JP2014008476A - Exhaust gas treatment device, activated carbon absorption tower and filtration type dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an exhaust gas treatment device compact.SOLUTION: In an exhaust gas treatment device 100, filtration type dust collectors 4 are installed at both sides of an activated carbon absorption tower 1 and partition walls 50 are formed by integrating side faces 10a of a main body 10 of the activated carbon absorption tower 1 with the side faces 42a of housings 42 of the filtration type dust collectors 4. Upper sections of the partition walls 50 are provided with communication ports 54 which communicate the main body 10 of the activated carbon absorption tower 1 with the housings 42 of the filtration type dust collectors 4. The activated carbon absorption tower 1 has activated carbon cartridges 2 installed therein and a clean gas pipe 3 connected thereto through an exhaust pipe on a bottom face of the main body 10. The filtration type dust collectors 4 have a polluted gas pipe 5 connected thereto through hoppers 8 below the same. The clean gas pipe 3 and the polluted gas pipe 5 are arranged in a space below the activated carbon absorption tower 1 and lateral to the filtration type dust collectors 4. The activated carbon cartridges 2 can be replaced through an opening section 11 of the main body 10. Thus, this configuration can make the exhaust gas treatment device 100 compact.

Description

  The present invention relates to an exhaust gas treatment apparatus, an activated carbon adsorption tower, and a filtration type dust collector for treating soot and harmful chemical substances contained in exhaust gas generated from a waste incinerator or the like.

  Exhaust gas generated from waste incinerators, ore smelting furnaces, electric furnaces, etc. includes dust, dioxins, heavy metals, volatile organic compounds (VOC), persistent organic pollutants (POPs (Persistent Organic) Pollutants)). Soot can be collected by a filtration type dust collector. Dioxins, heavy metals, volatile organic compound harmful substances, and the like can be removed by an activated carbon adsorption tower filled with granular activated carbon.

  As an activated carbon adsorption apparatus, the technique disclosed in Patent Document 1 is conventionally known. This activated carbon adsorbing device is a cartridge type in which a plurality of activated carbon layers are arranged inside, and the activated carbon layer is a permeation having heat permeability and heat resistance such as punching metal on the gas inflow side surface and the outflow side surface. A material is used, and a non-permeable surface such as a frame portion is configured using a heat-resistant non-permeable material such as a steel plate. The activated carbon is held inside by the permeable material at a predetermined thickness that does not cause self-ignition.

  Place one of the activated carbon layers as the gas inflow side and the other as the gas outflow side in parallel and face-to-face positions, introduce the exhaust gas into the space facing the gas inflow side, let the activated carbon layer pass, The exhaust gas discharged from the side is discharged from the space where the gas outflow side faces. The flow of this exhaust gas becomes a cross flow. The activated carbon cartridge of the activated carbon adsorption device is replaced with a new one when the adsorption performance of the activated carbon layer is lowered.

  As an example of such a cartridge-type activated carbon adsorption device, a technique described in Non-Patent Document 1 is known. This activated carbon adsorption device includes a box-shaped main body for introducing exhaust gas, an attachment / detachment port for attaching / detaching the activated carbon cartridge provided on the side surface of the main body, an exhaust gas introduction pipe connected to the upper portion of the main body, and a cleanness provided on the bottom surface of the main body. It consists of a gas discharge pipe. Moreover, the activated carbon adsorption device is disposed downstream of an incinerator, a temperature reduction tower, and a filtration dust collector, for example, in a cleaning factory. When the predetermined operating time has elapsed or when the activated carbon adsorption performance has deteriorated, the lid of the attachment / detachment opening is opened and the activated carbon cartridge is replaced. By adopting an activated carbon cartridge in which a plurality of activated carbon layers are arranged and the flow of exhaust gas is cross flow, the activated carbon adsorption device can be downsized.

JP 2005-152719 A JFE Engineering Co., Ltd. “Exhaust gas purification equipment using activated carbon”, Industrial Machinery No.734, page 67 (Japan Industrial Machinery Manufacturers Association, 2011)

  However, if the conventional activated carbon adsorption device and the filtration type dust collector are installed together, the gas pipe management and work space are necessary for each, so the substantial installation area becomes large, and the building and the site must be enlarged accordingly. There was a problem of having to. This invention is made in order to solve the subject which concerns.

The exhaust gas treatment apparatus according to the present invention has an activated carbon adsorption tower in which activated carbon adsorption means is installed inside the main body, and a plurality of tubular filter cloths (bag filters) inside the housing, and the main body of the activated carbon adsorption tower. A filter-type dust collector arranged adjacent to the side, an exhaust gas inlet provided on the side surface of the main body of the activated carbon adsorption tower, and a side surface of the casing of the filter-type dust collector facing the main body of the activated carbon adsorption tower The exhaust gas outlet is connected, and a communication portion is provided that communicates the inside of the main body of the activated carbon adsorption tower and the housing of the filtration dust collector.

  By arranging the filtration type dust collector adjacent to the side of the activated carbon adsorption tower, the entire exhaust gas treatment apparatus can be made compact. In this case, by connecting the exhaust gas inlet of the activated carbon adsorption tower and the exhaust gas outlet of the filtration dust collector, the exhaust gas is moved by communicating the interior of the main body of the activated carbon adsorption tower and the housing of the filtration dust collector. Let Note that the activated carbon dust collector and the filtration dust collector are adjacent to each other at least at an interval smaller than the outer dimension of the activated carbon adsorption means.

  The exhaust gas treatment apparatus according to the present invention includes an activated carbon adsorption tower in which activated carbon adsorption means is installed inside the main body, a plurality of cylindrical filter cloths inside the housing, and the left and right sides of the main body of the activated carbon adsorption tower. A filter-type dust collector disposed on the side of the main body of the activated carbon adsorption tower, an exhaust gas inlet provided on the side of the main body of the activated carbon adsorption tower, and an exhaust gas outlet provided on the side of the casing of the filter-type dust collector facing the main body of the activated carbon adsorption tower And a communication part that communicates the insides of the main body of the activated carbon adsorption tower and the housing of the filter-type dust collector.

  When the amount of processing gas is large, it is preferable to use a plurality of filtration dust collectors in parallel, particularly in a pulse jet filtration dust collector. Moreover, it is desirable to introduce the exhaust gas that has passed through the filter-type dust collector into the activated carbon adsorption tower at as short a distance as possible. Therefore, in the present invention, the activated carbon adsorption tower is arranged in the center and the filtration type dust collector is arranged on the left and right sides thereof, and the main body of the activated carbon adsorption tower and the case of the filtration type dust collector are communicated with each other at the communicating portion. Therefore, the exhaust gas treatment apparatus can be made compact, and exhaust gas can be introduced from the filtration dust collector into the activated carbon adsorption tower at a short distance.

  Moreover, in the said invention, it is preferable that the said activated carbon adsorption tower is set as the structure provided with the opening part provided in the upper part of the main body, and the cover part provided in this opening part so that attachment or detachment was possible.

  By providing an opening at the top of the main body, the activated carbon adsorbing means installed inside can be replaced from above. For this reason, a work space is not required on the side of the activated carbon adsorption tower, the filtration dust collector can be disposed adjacent to the activated carbon adsorption tower, and the entire apparatus can be made compact.

  Moreover, in the said invention, it is preferable that the side surface of the main body of the said activated carbon adsorption tower and the side surface of the housing | casing of a filtration type dust collector are integrated, a partition wall is comprised, and the said communicating port is formed in this partition wall.

  By integrating the side of the main body of the activated carbon adsorption tower and the side of the housing of the filtration dust collector, the gap between the activated carbon adsorption tower and the filtration dust collector can be almost eliminated. Can be made compact. In addition, in the case of integrating the side surfaces, not only when the main body and the housing are integrated by a common steel plate, but also when two steel plates are stacked and bonded, there are cases where they are bonded via a heat insulating layer or the like. included.

  Further, in the above invention, when a filtration type dust collector is further disposed on the side of the activated carbon adsorption tower, the activated carbon adsorption is placed in a space below the activated carbon adsorption tower and on the side of the filtration type dust collector. It is preferable that a clean gas pipe for deriving the clean gas that has passed through the activated carbon adsorbing means installed in the tower is disposed.

  According to such a configuration, the gas pipe space can be accommodated within the installation area of the exhaust gas treatment apparatus, so that the entire apparatus can be made compact.

  In the above invention, the activated carbon adsorbing means comprises an activated carbon cartridge in which a pollutant gas passage is opened on the upper surface and a clean gas passage is opened on the lower surface, and a frame-like convex portion is provided around the lower surface. A frame-like support structure for supporting the lower surface of the activated carbon cartridge is provided around the clean gas outlet on the lower surface of the adsorption tower, and the upper surface of the support structure has a frame shape corresponding to the convex portion, and A configuration in which an elastic member wider than the convex portion is provided is preferable.

  When the activated carbon cartridge is placed on the support structure, the convex portion on the lower surface of the activated carbon cartridge is cut into the elastic member and sealed, and the gap between the activated carbon cartridge and the bottom surface of the activated carbon adsorption tower is kept airtight. In addition, since an elastic member having a width wider than that of the convex portion is used, sealing is possible even if the installation position is slightly shifted. Thereby, it is possible to prevent the untreated gas from leaking into the clean gas outlet of the bottom surface. The convex portion preferably has a rounded tip. For example, a solid round bar or a hollow round bar made of a rigid member is desirable.

  In the above invention, the activated carbon adsorbing means includes an activated carbon storage section filled with the granular activated carbon, a contaminated gas passage through which exhaust gas flowing into the activated carbon storage section flows, and exhaust gas flowing out of the activated carbon storage section. Flowing clean gas passages are arranged in a line, and the activated carbon storage portion includes an activated carbon layer formed by the granular activated carbon and a pair of parallel gas passage surfaces, and the contaminated gas passage and the clean gas passage. The gas passage preferably has a configuration in which the main flow direction of the exhaust gas is perpendicular to the thickness direction of the activated carbon layer.

  The activated carbon adsorption tower according to the present invention is an activated carbon adsorption tower for treating exhaust gas from a filtration dust collector, and has a side surface integrated with a side surface of a housing of the filtration dust collector, And an exhaust gas inlet connected to an exhaust gas outlet of the filtration type dust collector provided on a side surface of the main body.

  The filtration type dust collector according to the present invention is a filtration type dust collector for leading the treated exhaust gas to the activated carbon adsorption tower, and has a side surface integrated with a side surface of the main body of the activated carbon adsorption tower and has an internal And a casing having a plurality of cylindrical filter cloths, and an exhaust gas outlet provided on a side surface of the casing and connected to the exhaust gas inlet of the activated carbon adsorption tower.

  According to the present invention, the exhaust gas treatment apparatus can be made compact by devising the layout of the activated carbon adsorption tower and the filtration dust collector.

FIG. 1 is a perspective view showing an exhaust gas treatment apparatus according to Embodiment 1 of the present invention. FIG. 2 is an exploded view of the exhaust gas treatment apparatus shown in FIG. FIG. 3 is a plan view of the exhaust gas treatment apparatus shown in FIG. FIG. 4 is an explanatory view showing the internal structure of the activated carbon adsorption tower shown in FIG. FIG. 5 is a cross-sectional view of the activated carbon adsorption tower shown in FIG. FIG. 6 is an explanatory view of the activated carbon cartridge shown in FIG. FIG. 7 is an explanatory diagram of the activated carbon storage unit shown in FIG. 1. FIG. 8 is an explanatory view showing a support structure of the activated carbon cartridge shown in FIG. FIG. 9 is an explanatory view showing another example of the activated carbon cartridge. FIG. 10 is an explanatory view showing the flow of the exhaust gas of the exhaust gas treatment apparatus shown in FIG. FIG. 11 is an explanatory view showing a modified example of the activated carbon cartridge. FIG. 12 is a perspective view showing an exhaust gas treatment apparatus according to another embodiment of the present invention. FIG. 13 is a perspective view showing an exhaust gas treatment apparatus according to Embodiment 2 of the present invention.

(Embodiment 1)
FIG. 1 is a perspective view showing an exhaust gas treatment apparatus according to Embodiment 1 of the present invention. FIG. 2 is an exploded view of the exhaust gas treatment apparatus shown in FIG. 3 is a plan view of the exhaust gas treatment apparatus shown in FIG. 1, in which (a) is a top view, (b) is a side view, and (c) is a front view. FIG. 4 is an explanatory diagram showing the internal structure of the activated carbon adsorption tower. FIG. 5 is a cross-sectional view of the activated carbon adsorption tower. 6A and 6B are explanatory views of the activated carbon cartridge, wherein FIG. 6A is a sectional view and FIG. 6B is a perspective view. FIG. 7 is an explanatory view of the activated carbon storage unit, in which (a) is a front view and (b) is a cross-sectional view. FIG. 8 is an explanatory view showing a support structure of the activated carbon cartridge.

  This exhaust gas treatment apparatus 100 is adjacent to the activated carbon adsorption tower 1 in which the activated carbon cartridge 2 is disposed, the clean gas pipe 3 disposed below the activated carbon adsorption tower 1, and the left and right sides of the activated carbon adsorption tower 1. It comprises a pair of filter-type dust collectors 4 arranged and a polluted gas pipe 5 arranged on the side of the filter-type dust collector 4 and below the clean gas pipe 3. Note that the filter-type dust collector 4 is disposed adjacent to the activated carbon adsorption tower 1, as described later, that the main body 10 and the housing 42 are integrated, a heat insulating layer or the like between the main body 10 and the housing 42. And having a certain gap or space, and being close to each other at a distance smaller than the size of the activated carbon cartridge 2 described later.

  A plurality of exhaust pipes 7 are provided on the lower surface of the main body 10 of the activated carbon adsorption tower 1. The lower end of the exhaust pipe 7 is connected to the clean gas pipe 3. A plurality of hoppers 8 for discharging the collected dust are provided on the lower surface of the housing 42 of the filter type dust collector 4. An introduction pipe 9 is provided at an intermediate position in the height direction of the hopper 8. The introduction pipe 9 is connected to the contaminated gas pipe 5. A rotary valve (not shown) is provided at the lower end of the hopper 8 so that dust can be discharged while gas is sealed. The clean gas pipe 3 has one end closed and the other end connected to a chimney or the like (not shown). One end of the contaminated gas pipe 5 is closed, and the other end is connected to a furnace or the like (not shown) that generates the contaminated gas.

  The clean gas pipe 3 and the contaminated gas pipe 5 are arranged one above the other and in a space formed between the filtration dust collector 4 and the activated carbon adsorption tower 1. In other words, when the upper surface (lid portion 12) of the activated carbon adsorption tower 1 and the upper surface (lid portion 46) of the filtration dust collector 4 are disposed adjacent to each other, the volume of the filtration dust collector 4 is increased. Therefore, a space is formed on the lower side of the activated carbon adsorption tower 1 and on the lateral side of the filtering dust collector 4. The clean gas pipe 3 and the contaminated gas pipe 5 are disposed in the space. For this reason, since a gas pipe space can be stored in the installation area of the exhaust gas treatment apparatus 100, the exhaust gas treatment apparatus 100 can be made compact. Further, the pollutant gas pipe 5 and the clean gas pipe 3 are arranged in parallel in a substantially straight line, the pollutant gas pipe 5 is provided to extend to one side of the exhaust gas treatment apparatus 100, and the clean gas pipe 3 is on the other side. It is provided to extend. Thereby, when installing the exhaust gas processing apparatus 100 in a cleaning factory, a steelworks, etc., an efficient layout is attained.

  The activated carbon adsorption tower 1 includes a rectangular parallelepiped main body 10, an opening 11 provided on the upper surface of the main body 10, and a lid 12 provided on the opening 11 (the lid 12 is removed in FIG. 1). And the exhaust pipe 7 provided on the bottom surface 13 of the main body 10. In the main body 10, a plurality of communication ports 54 are provided above the wall surface 10 a on the side adjacent to the filtration dust collector 4. An activated carbon cartridge 2 that is activated carbon adsorption means is installed on the bottom surface 13 of the main body 10. The activated carbon cartridge 2 can be replaced by opening the lid 12 from the opening 11. A support structure 16 for the activated carbon cartridge 2 is provided around the opening 7 a (clean gas outlet) of the exhaust pipe 7 on the bottom surface 13. The support structure 16 is welded in a hermetic manner to the bottom surface 13 by welding a beam 17 made of a shape steel such as an I-shaped steel into a square frame shape.

Since the activated carbon adsorption tower 1 is required to have a high removal rate (for example, 99% or more), untreated exhaust gas that does not pass through the activated carbon layer 21 leaks from between the activated carbon cartridge 2 and the bottom surface 13 of the main body 10 of the activated carbon adsorption tower 1. It is necessary not to come out.

  A rectangular frame-shaped packing 19 is provided on the top surface 18 of the support structure 16. The packing 19 uses silicon having a heat resistant temperature of 200 ° C. in order to withstand high temperature gas. Its cross section is strip-shaped, rectangular or square. Around the lower surface of the flange 22a of the cartridge housing 22, a bar 20 (rigid member such as a solid round bar or a hollow round bar) which is a convex portion arranged in a square frame shape is provided. The bar 20 is welded to the lower surface of the flange 22a in an airtight state. When the activated carbon cartridge 2 is placed on the activated carbon layer 21, the bar 20 bites into the packing 19, and the space between the activated carbon cartridge 2 and the exhaust pipe 7 is kept airtight and isolated from the outside. In addition, since the packing 19 is highly flexible, even if there is some distortion in the bar 20, it can be absorbed to maintain confidentiality. The width of the packing 19 is preferably wider than the diameter of the bar 20. Thereby, even if some position shift arises when installing activated carbon cartridge 2 with a crane, the secrecy of activated carbon cartridge 2 is maintained. In addition, although three activated carbon cartridges 2 are arrange | positioned in the main body 10, it is not limited to this.

  As shown in FIGS. 6 and 7, the activated carbon cartridge 2 has a cartridge housing 22, an activated carbon storage portion 24 composed of a rectangular thin box-like beam structure 23, and air permeability such as punching metal and a net-like plate. A gas passage surface 25, a shielding plate 26 for regulating the flow of gas, a lid portion 27 used when the activated carbon layer 21 is taken in and out, and an activated carbon layer 21 formed by filling the activated carbon storage portion 24 with granular activated carbon. And steel wool 28 housed in the upper part of the activated carbon layer 21. In order to prevent the granular activated carbon from bubbling, the activated carbon layer 21 is closely packed while being vibrated by a vibrator or struck by a rod or the like. The activated carbon storage units 24 are provided in four rows at regular intervals in the cartridge housing 22. The upper portions of the spaces of the first activated carbon storage portion 24a and the second activated carbon storage portion 24b are connected and covered by a shielding plate 26. The lower portions of the spaces of the second activated carbon storage portion 24b and the third activated carbon storage portion 24c are connected and covered by a shielding plate 29. The upper portions of the spaces of the third activated carbon storage portion 24c and the fourth activated carbon storage portion 24d are connected and covered by a shielding plate 28.

  In addition, the first activated carbon storage unit 24 a and the fourth activated carbon storage unit 24 d are arranged at a certain distance from the inner wall of the cartridge housing 22. Further, the lower portions of the first activated carbon storage portion 24 a and the fourth activated carbon storage portion 24 d and the lower end of the cartridge housing 22 are connected and covered by a shielding plate 30. Thereby, the space between the inner wall of the cartridge housing 22 and the first activated carbon storage portion 24a, the space between the second activated carbon storage portion 24b and the third activated carbon storage portion 24c, the fourth activated carbon storage portion 24d and the cartridge. A space with the inner wall of the housing 22 serves as a contaminated gas passage 31. In addition, the space between the first activated carbon storage portion 24a and the second activated carbon storage portion 24b and the space between the third activated carbon storage portion 24c and the fourth activated carbon storage portion 24d serve as the clean gas passage 32. The contaminated gas passage 31 is opened on the upper surface of the activated carbon cartridge 2, and the clean gas passage 32 is opened on the lower surface. According to such a configuration, the so-called cross flow in which the main flow direction of the exhaust gas in the polluted gas passage 31 and the clean gas passage 32 and the main flow direction (flow in the thickness direction) of the exhaust gas in the activated carbon layer 21 are substantially orthogonal to each other. Become.

  In addition, the number of the activated carbon storage parts 24 mounted in one activated carbon cartridge 2 is not limited to this. For example, by increasing the number of activated carbon storage portions 24 to six, the number of contaminated gas passages 31 may be four and the number of clean gas passages 32 may be three. Various configurations are possible depending on the combination of the number of the activated carbon storage portions 24 and the shielding plates 26 and 29.

  Further, the activated carbon storage unit 24 has a slow flow of exhaust gas at the upper end 24f due to its structure. Granular activated carbon generates heat due to adsorption of harmful substances, and if the flow of exhaust gas is slow, heat storage proceeds and there is a risk of ignition. Therefore, by providing the steel wool 28 at the upper end 24f of the activated carbon storage 24, there is no risk of self-ignition even if heat is stored in the upper end 24f of the activated carbon storage 24. Further, the steel wool 28 is adhered to both the inner surface of the lid portion 27 of the activated carbon storage unit 24 and the activated carbon layer 21. The steel wool 28 is freely deformed in shape and pressurizes the granular activated carbon by its entire elastic force. For this reason, even when gas passes through the granular activated carbon, fluidization hardly occurs in the activated carbon layer 21, and the removal efficiency of harmful substances does not decrease. Therefore, it becomes possible to remove harmful substances with a smaller amount of granular activated carbon than in the past.

  The thickness of the activated carbon layer 21 of the activated carbon storage unit 24 is desirably 30 mm to 100 mm. This is because if the layer thickness of the activated carbon layer 21 is less than 30 mm, exhaust gas may slip through and the harmful component removal performance may deteriorate, and if the layer thickness exceeds 100 mm, the activated carbon layer 21 may accumulate heat and ignite. Further, the height and depth of the activated carbon storage unit 24 can be arbitrarily determined. The said height and depth shall be the range of 500 mm-3000 mm, for example. The width of the polluted gas passage 31 and the clean gas passage 32 (the dimension in the thickness direction of the activated carbon layer 21) is preferably in the range of about 20 mm to 300 mm for reasons of flow velocity and structure.

  Moreover, the gas passage surface 25 may swell by filling the activated carbon storage part 24 with granular activated carbon (indicated by a dotted line in FIG. 7). When the gas passage surface 25 swells, the thickness of the activated carbon layer 21 is not constant, and the contaminated gas passage 31 and the clean gas passage 32 are narrowed, which adversely affects the pressure loss and harmful substance removal efficiency of the activated carbon cartridge 2. Therefore, in the activated carbon cartridge 2, as shown in FIG. 7, an intermediate support member 33 made of a rigid member is provided at the center of the gas passage surface 25. The intermediate support member 33 presses the gas passage surface 25 of the activated carbon storage unit 24 and prevents the gas passage surface 25 from expanding. A plurality of intermediate support members 33 may be provided at regular intervals.

  The cartridge housing 22 of the activated carbon cartridge 2 is preferably made of a metal such as ordinary steel, stainless steel, or aluminum for reasons such as strength, durability, and ease of manufacture. Moreover, the gas passage surface 25 is preferably thin (about 1 mm in thickness) and light in shape with high air permeability such as a metal mesh or punching metal made of the above material for reasons such as ventilation, durability, and weight. . The shape of the activated carbon storage portion 24 is preferably a rectangular parallelepiped, but may be any other shape as long as it has a pair of parallel gas passage surfaces 25. By disposing one set of gas passage surfaces 25 in parallel, exhaust gas can be made to flow uniformly to the activated carbon layer 21 and the removal efficiency of harmful substances can be improved.

  When the members constituting the cartridge housing 22 of the activated carbon cartridge 2 are fastened and fixed with bolts and nuts, it is preferable to seal the tightened portions of the bolts and nuts. Thereby, it is possible to prevent gas from leaking from the tightening portion of the bolt and nut. The lid portion 26 can be opened and closed, and is fixed with a bolt or the like so as not to open carelessly.

  As the granular activated carbon, any of crushed coal, granulated coal, formed coal (granulated coal), and spherical coal can be used. Since the columnar coal has little variation in shape and size and is low in cost, it is optimal for the production of granular activated carbon. Further, depending on the harmful substance to be removed by adsorption, chemicals or metals may be attached to the granular activated carbon.

  As for the size of the granular activated carbon, it is desirable that the particle size is 0.5 mm or more and 2.4 mm or less (the particle size is 8 mesh or more and 32 mesh or less). In the activated carbon adsorption tower 1, granular activated carbon having a particle size of 4 mm or more (particle size of 5 mesh or less) is often used to prevent fluidization, but dioxins and the like are adsorbed near the surface of the activated carbon particles. Therefore, granular activated carbon having a smaller particle size has a larger contact area with exhaust gas per unit volume and higher removal efficiency. For this reason, it is preferable that a particle size shall be less than 2.4 mm. On the other hand, if the particle diameter of the granular activated carbon is less than 0.5 mm, it will be difficult to produce a gas passage surface 25 suitable for the particle activated carbon, so the particle diameter is preferably 0.5 mm or more.

  When the activated carbon cartridge 2 is replaced, the lid portion 12 of the opening 11 is opened, the activated carbon cartridge 2 is lifted by a crane, and a new activated carbon cartridge 2 is inserted. When the activated carbon cartridge 2 is installed, the bar 20 of the flange 22a bites into the packing 19 of the support structure 16, and the activated carbon cartridge 2 and the exhaust pipe 7 are connected in an airtight manner. The opening 11 and the lid 12 may be sized so that a single activated carbon cartridge 2 can be taken in and out, or sized so that a plurality of activated carbon cartridges 2 can be taken in and out. The lid 12 may have a separate structure or a hinge structure.

  Next, the filtering dust collector 4 has a structure in which a large number of cylindrical coverings 41 made of a material such as Teflon (registered trademark) fiber or glass fiber are housed in a housing 42. A partition plate 43 that divides the interior up and down is provided at an upper portion in the housing 42. A large number of holes 44 are provided in the partition plate 43, and the cylindrical cloth 41 is suspended from the holes 44. A retainer for holding the shape in a cylindrical shape is provided in the cylindrical cloth 41 (not shown).

  The casing 42 is a rectangular parallelepiped long in one direction, and an opening 45 is provided on the upper surface thereof. A lid 46 is detachably provided in the opening 45 (FIG. 1 shows both the state where the lid 46 is removed and the state where it is attached). A plurality of hoppers 8 are provided on the lower surface of the housing 42 as described above. A rotary valve is provided at the lower end of the hopper 8 (not shown). Further, an air ejection pipe for ejecting pulse jet air is provided in the housing 42 and above the partition plate 43 (not shown because it is a known technique). The air ejection pipe is provided with a number of ejection openings, and each ejection opening faces the upper end opening of the cylindrical cloth 41. A compressed air supply unit that supplies air of a predetermined pressure and a pulse jet generation valve that includes a diaphragm valve and the like are provided at the end of the air ejection pipe. In addition, as a method for dust removal, a mechanical vibration method or a counter pressure dust removal method may be employed in addition to the pulse jet method.

  In the filter type dust collector 4, it is necessary to slow down the gas flow rate passing through the filter cloth (about 0.5 to 1.5 m / min). For this reason, the filter-type dust collector 4 is larger than other components of the exhaust gas treatment apparatus 100. On the other hand, if the lateral width of the filter type dust collector 4 is made too wide, problems such as difficulty in uniformly flowing the compressed air of the pulse jet occur. Therefore, when the amount of processing gas is large, the pulse jet type filter type dust collector 4 is particularly large. Then, for example, it is preferable to cope by installing two filtration type dust collectors 4 in parallel.

  Both side surfaces 10a of the main body 10 of the activated carbon adsorption tower 1 and one side surface 42a of the case 42 of the filter-type dust collector 4 disposed on the left and right sides of the activated carbon adsorption tower 1 are integrated to form a partition wall 50. To do. For example, the partition wall 50 is configured by a single steel plate common to both side surfaces 10 a of the main body 10 of the activated carbon adsorption tower 1 and one side surface 42 a of the housing 42 of the filtration dust collector 4. In another structure, the steel plate which comprises the both sides 10a of the main body 10 of the activated carbon adsorption tower 1, and the one side 42a of the housing | casing 42 of the filter-type dust collector 4 provided in the right and left both sides of the said activated carbon adsorption tower 1 are comprised. The partition wall 50 is configured by superimposing the steel plates and welding or mechanically fastening and integrating them.

  In still another configuration, as shown in FIG. 9A, steel plates constituting both side surfaces 10 a of the main body 10 of the activated carbon adsorption tower 1 and filtration type dust collectors 4 provided on the left and right sides of the activated carbon adsorption tower 1. A partition wall 50 is configured by integrating a steel plate constituting one side surface 42a of the casing 42 with a heat-insulating layer 51 made of a constant gap or a heat insulating material. By forming the heat insulation layer 51, it is possible to prevent the heat of the exhaust gas from moving from the filtration dust collector 4 to the activated carbon adsorption tower 1.

  In still another aspect, as shown in FIG. 9 (b), steel plates constituting both side surfaces 10 a of the main body 10 of the activated carbon adsorption tower 1 and filtration type dust collectors 4 provided on the left and right sides of the activated carbon adsorption tower 1. The steel plate constituting one side 42a of the casing 42 is integrated with a gap smaller than the size of the activated carbon cartridge 2. In this exhaust gas treatment apparatus 100, the activated carbon cartridge 2 is exchanged from the top, and the exchange work on the side of the activated carbon adsorption tower 1 is not performed. For this reason, the main body 10 and the casing 42 can be disposed adjacent to each other with a gap smaller than the outer dimension of the activated carbon cartridge 2.

  In the upper part of the partition wall 50, a communication port 54 for communicating the activated carbon adsorption tower 1 and the filtration dust collector 4 is provided. The communication port 54 includes an exhaust gas inlet 54 a of the activated carbon adsorption tower 1 and an exhaust gas outlet 54 b of the filtration type dust collector 4. When the partition wall 50 is composed of a single steel plate, the communication port 54 is configured by a simple hole having the functions of the exhaust gas inlet 54a of the activated carbon adsorption tower 1 and the exhaust gas outlet 54b of the filtration dust collector 4. The When the partition wall 50 is configured by combining two steel plates, holes are provided in each steel plate and the holes are aligned to form one communication port 54. In addition, when the partition wall 50 is comprised from two steel plates, and there exists a clearance gap or the heat insulation layer 51 between a steel plate, the communicating port 54 connects the holes of each steel plate and those holes. Consists of short cylinders or holes.

  Thus, the partition wall 50 is formed by integrating the both side surfaces 10a of the main body 10 of the activated carbon adsorption tower 1 and the one side surface 42a of the housing 42 of the filter type dust collector 4 disposed on the left and right sides of the activated carbon adsorption tower 1. By configuring, the size of the entire apparatus can be reduced. Further, exhaust gas is introduced into the main body through the communication port 54 from the left and right sides of the activated carbon adsorption tower 1 without passing through the gas pipe.

  Next, the operation of the exhaust gas treatment apparatus 100 will be described. FIG. 10 is an explanatory view showing the flow of exhaust gas. Exhaust gas G discharged from an incinerator or the like enters the inside of the housing 42 from an intermediate position of the hopper 8 of the filtration dust collector 4 through the polluted gas pipe 5 and the introduction pipe 9. In the filter type dust collector 4, dust contained in the exhaust gas is collected on the outer surface of a large number of cylindrical cloths 41. The collected dust is wiped off by a pulse jet periodically ejected to the inner surface. The dust removed is collected by the hopper 8 and discharged from a rotary valve (not shown).

  The exhaust gas that has passed through the cylindrical cloth 41 still contains harmful substances that exist as gases such as gaseous dioxins. This exhaust gas flows into the upper part of the filtration type dust collector 4, passes through the communication port 54, and is introduced into the upper part of the activated carbon adsorption tower 1. In the activated carbon adsorption tower 1, harmful substances are removed by the activated carbon layer 21 when the exhaust gas passes through the activated carbon cartridge 2. In the activated carbon cartridge 2, the exhaust gas containing harmful substances entering the polluted gas passage 31 enters the activated carbon layer 21 from the gas passage surface 25 of the activated carbon layer 21 and is discharged from the opposite gas passage surface 25 to the clean gas passage 32. The Exhaust gas from which harmful substances have been removed from the clean gas passage 32 passes through the exhaust pipe 7 of the activated carbon adsorption tower 1 and reaches the clean gas pipe 3. The exhaust gas discharged to the clean gas pipe 3 is discharged from a chimney or the like.

  As described above, according to the exhaust gas treatment apparatus 100 of the present invention, since the filtration dust collectors 4 are adjacently disposed on both the left and right sides of the activated carbon adsorption tower 1, the entire apparatus becomes compact. Moreover, the whole apparatus can be made more compact by arrange | positioning the pollutant gas pipe | tube 5 and the clean gas pipe | tube 3 in the space between the filtration type dust collector 4 and the activated carbon adsorption tower 1. FIG. Furthermore, since the activated carbon cartridge 2 is exchanged from the upper part of the activated carbon adsorption tower 1, the exchange work space around the activated carbon adsorption tower 1 is omitted, and the filtration type dust collectors 4 are installed on the left and right of the activated carbon adsorption tower 1. The activated carbon cartridge can be replaced in a short time using a crane.

  FIG. 11 is an explanatory view showing a modification of the activated carbon cartridge. This activated carbon cartridge 120 includes a casing 122, an activated carbon storage section 24 made of a rectangular thin box-like beam structure, a gas passage surface 25 having air permeability such as a punching metal or a net-like plate, and restricts the flow of gas. Shielding plate 126 to be used, lid portion 127 used when taking in and out activated carbon layer 21, activated carbon layer 21 formed by filling activated carbon storage portion 24 with granular activated carbon, and steel stored above activated carbon layer 21 It is composed of wool 28.

  In addition, the activated carbon storage unit 24 is provided at a predetermined position in the housing 122. The upper part of the activated carbon storage unit 24 and the upper part of one surface of the housing 122 are connected and covered by a shielding plate 126. Further, the lower part of the activated carbon storage unit 24 and the lower part of the other surface of the housing 122 are connected and covered by a shielding plate 128. As a result, the pollutant gas passage 31 is formed between the activated carbon storage unit 24 and the other surface of the housing 122, and the clean gas passage 32 is formed between the activated carbon storage unit 24 and one surface of the housing 122. In the contaminated gas passage 31 and the clean gas passage 32, a restraining member 130 is provided. The restraining member 130 is a long member having a U-shaped cross section made of a steel plate, and is provided substantially vertically along the main flow direction of the exhaust gas. The flange 131 is fixed in contact with the inner surface of the housing 122 and the gas passage surface 25 facing the inner surface. The flat portion 132 is disposed so as to be substantially perpendicular to the gas passage surface 25 of the activated carbon storage portion 24.

  The restraining member 130 abuts the flange 131 on the gas passage surface 25, thereby preventing the activated carbon storage unit 24 from expanding due to filling with the granular activated carbon. One constraining member 130 may be provided in each of the pollutant gas passage 31 and the clean gas passage 32, or a plurality of restraining members 130 may be provided. By providing a plurality of restraining members 130, it is possible to further prevent the gas passage surface 25 from bulging and to enhance the rectification effect of the exhaust gas in the contaminated gas passage 31 and the clean gas passage 32. Other configurations are the same as those of the activated carbon cartridge 2 shown in FIGS. Moreover, you may provide the restraint member 130 in the contaminated gas channel | path 31 and the clean gas channel | path 32 of the activated carbon cartridge 2 shown in FIG.6 and FIG.7.

  FIG. 12 is a perspective view showing an exhaust gas treatment apparatus according to another embodiment of the present invention. This exhaust gas treatment device 150 has a configuration in which the filtration type dust collector 4 of the exhaust gas treatment device 100 described in the first embodiment is provided on one side of the activated carbon adsorption tower 1. Since the detailed configurations of the filtration dust collector 4 and the activated carbon adsorption tower 1 are the same as those of the first embodiment, the description thereof is omitted. Also in the exhaust gas treatment device 150, the clean gas pipe 3 and the contaminated gas pipe 5 are arranged in a space formed on the side of the filtration dust collector 4 below the activated carbon adsorption tower 1. For this reason, it is not necessary to provide a gas pipe space around the exhaust gas treatment device 150. Furthermore, since the opening parts 11 and 45 of the main bodies 10 and 42 of the activated carbon adsorption tower 1 and the filtration type dust collector 4 are provided on the upper part, the activated carbon cartridge 2 and the cylindrical cloth can be replaced by a crane. No replacement work space for the activated carbon cartridge 2 is required around 100. Moreover, since the one side 10a of the main body 10 of the activated carbon adsorption tower 1 and the one side surface 42a of the housing 42 of the filtration dust collector 4 are integrated to form the partition wall 50, the size of the entire apparatus can be reduced.

(Embodiment 2)
FIG. 13 is a perspective view showing an exhaust gas treatment apparatus according to Embodiment 2 of the present invention. This exhaust gas treatment apparatus 200 has a configuration in which a filtration type dust collector 204 has a donut-like circular shape and an activated carbon adsorption tower 201 is provided at the center. The exhaust gas treatment apparatus 200 also has the same configuration requirements as those of the first embodiment and has the same operational effects. That is, the filter-type dust collector 204 whose volume is increased is adjacent to the side periphery of the activated carbon adsorption tower 201, and one side surface 242 a of the housing 242 of the filter-type dust collector 204 and the side surface 210 a of the main body 210 of the activated carbon adsorption tower 1. Are integrated into a partition wall 250. A plurality of communication ports 254 are provided in the upper part of the partition wall 250. Thereby, since the space between the filtration dust collector 204 and the activated carbon adsorption tower 201 is omitted, the entire apparatus becomes compact. In the integration of one side surface 242a of the housing 242 of the filter-type dust collector 204 and the side surface 210a of the main body 210 of the activated carbon adsorption tower 201, the one side surface 242a and the side surface 210a are made of different steel plates and are stacked. The structure which joined may be sufficient and you may integrate in the state which provided the heat insulation layer between the said one side 242a and the side 210a.

  An opening 211 is provided at the top of the main body 210, and the activated carbon cartridge 202 can be replaced by opening and closing the lid 212 of the opening 211. For this reason, the space for replacement | exchange of the activated carbon cartridge 202 around an apparatus is unnecessary. Further, a filtration type dust collector 204 can be disposed around the entire activated carbon adsorption tower 201.

  A hole 207 a is formed in the bottom surface 213 of the activated carbon adsorption tower 201. A support structure 216 having the same configuration as that described in Embodiment 1 is provided around the hole 207a. The activated carbon cartridge 202 is mounted on the support structure 216 and sealed with a packing and a bottom bar (both not shown) having the same configuration as that shown in the first embodiment. The clean gas pipe 203 extends from the lower part of the activated carbon adsorption tower 201.

  The housing 204 of the filtration dust collector 204 is divided into two layers by a partition plate 243. A plurality of holes 244 are provided in the partition plate 243, and the cylindrical cloth 241 of the same filter cloth as that of the first embodiment is detachably provided in the holes 244. An opening 245 is provided in the upper part of the housing 204, and the cylindrical cloth 241 can be exchanged by opening and closing the lid 246 of the opening 245. The contaminated gas pipe is connected to a hopper 208 provided on the lower surface of the filtration type dust collector 204.

  As described above, according to the exhaust gas treatment apparatus 200 according to the second embodiment, since the filter-type dust collector 204 is disposed around the side of the activated carbon adsorption tower 201 as in the first embodiment, the entire apparatus becomes compact. . Further, since the activated carbon cartridge 202 can be exchanged from the upper part of the activated carbon adsorption tower 201, the working space around the activated carbon adsorption tower 201 can be omitted, and the filtration type dust collector 204 can be arranged around the activated carbon adsorption tower 201. It becomes like this. Furthermore, since the activated carbon cartridge 202 can be handled from above, the activated carbon cartridge 202 can be replaced in a short time using a crane. Similarly, since the cylindrical cloth 241 can be exchanged from the upper part of the housing 242 of the filter type dust collector 204, the work space around the filter type dust collector 204 can be omitted. Also, the crane work becomes extremely easy.

DESCRIPTION OF SYMBOLS 100 Exhaust gas treatment apparatus 1 Activated carbon adsorption tower 2 Activated carbon cartridge 3 Clean gas pipe 4 Filtration type dust collector 5 Contaminated gas pipe 7 Exhaust pipe 8 Hopper 9 Introducing pipe 10 Case 11 Opening part 12 Cover part 16 Support structure 19 Packing 20 Rod Material 21 Activated carbon layer 22 Cartridge housing 24 Activated carbon storage part 25 Gas passage surface

Claims (9)

Activated carbon adsorption tower with activated carbon adsorption means installed inside the main body,
While having a plurality of cylindrical filter cloth inside the housing, a filtration type dust collector disposed adjacent to the side of the main body of the activated carbon adsorption tower,
An exhaust gas inlet provided on a side surface of the main body of the activated carbon adsorption tower and an exhaust gas outlet provided on a side surface of the housing of the filtration dust collector facing the main body of the activated carbon adsorption tower are connected, A communicating portion that communicates with the inside of the housing of the filtration dust collector;
An exhaust gas treatment apparatus comprising: Activated carbon adsorption tower with activated carbon adsorption means installed inside the main body,
A plurality of cylindrical filter cloths inside the housing, and a filtration type dust collector disposed on the left and right sides of the main body of the activated carbon adsorption tower,
An exhaust gas inlet provided on a side surface of the main body of the activated carbon adsorption tower and an exhaust gas outlet provided on a side surface of the housing of the filtration dust collector facing the main body of the activated carbon adsorption tower are connected, A communicating portion that communicates with the inside of the housing of the filtration dust collector;
An exhaust gas treatment apparatus comprising:   3. The exhaust gas treatment apparatus according to claim 1, wherein the activated carbon adsorption tower further includes an opening provided at an upper portion of the main body and a lid provided detachably at the opening. .   The side surface of the main body of the activated carbon adsorption tower and the side surface of the housing of the filtration dust collector are integrated to form a partition wall, and the communication port is formed in the partition wall. The exhaust gas treatment apparatus according to any one of the above.   Further, when a filtration type dust collector is arranged on the side of the activated carbon adsorption tower, the activated carbon installed in the activated carbon adsorption tower below the activated carbon adsorption tower and in a space on the side of the filtration type dust collector. The exhaust gas treatment apparatus according to any one of claims 1 to 4, further comprising a clean gas pipe for deriving the clean gas that has passed through the adsorption means. The activated carbon adsorbing means comprises an activated carbon cartridge in which a pollutant gas passage is opened on the upper surface and a clean gas passage is opened on the lower surface, and a frame-shaped convex portion is provided around the lower surface,
A frame-like support structure for supporting the lower surface of the activated carbon cartridge is provided around the clean gas outlet on the lower surface of the activated carbon adsorption tower, and the upper surface of the support structure has a frame shape corresponding to the convex portion. The exhaust gas treatment apparatus according to any one of claims 1 to 5, wherein an elastic member wider than the convex portion is provided. The activated carbon adsorbing means includes an activated carbon storage section filled with the granular activated carbon, a contaminated gas passage through which exhaust gas flowing into the activated carbon storage section flows, and a clean gas passage through which exhaust gas flowing out of the activated carbon storage section flows. Arranged in a row,
The activated carbon storage unit includes an activated carbon layer formed of the granular activated carbon and a pair of parallel gas passage surfaces,
The contaminated gas passage and the clean gas passage have a shape in which a main flow direction of exhaust gas is orthogonal to a thickness direction of the activated carbon layer. Exhaust gas treatment apparatus as described in one. An activated carbon adsorption tower for treating exhaust gas from a filtration dust collector,
A main body having a side surface integrated with a side surface of the housing of the filtration type dust collector and having activated carbon adsorption means installed therein;
An exhaust gas inlet connected to an exhaust gas outlet of the filtration dust collector, provided on a side surface of the main body;
The activated carbon adsorption tower characterized by having. A filtration type dust collector for discharging treated exhaust gas to an activated carbon adsorption tower,
A housing having a side surface integrated with a side surface of the main body of the activated carbon adsorption tower and having a plurality of cylindrical filter cloths therein;
An exhaust gas outlet connected to an exhaust gas inlet of the activated carbon adsorption tower, provided on a side surface of the housing;
A filtration type dust collector characterized by comprising:

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