CN217127249U

CN217127249U - Drying device suitable for wet sludge

Info

Publication number: CN217127249U
Application number: CN202123065354.9U
Authority: CN
Inventors: 赖瑞琪; 湛汉钊; 黄惠民
Original assignee: Foshan Yongda Machinery Manufacturing Co ltd
Current assignee: Foshan Yongda Machinery Manufacturing Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-08-05
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a drying device suitable for wet sludge, which comprises a reactor and a thermalization dryer, wherein the top of the reactor is provided with a material inlet and an exhaust pipe; the thermalization dryer comprises an inner container and a sleeve which are coaxially arranged inside and outside in a sealing manner, and the inner container can rotate around a central shaft relative to the sleeve; an interlayer channel for an external gas heat source to flow through is formed between the inner wall of the sleeve and the outer wall of the inner container; the bottom of the reactor is provided with a reaction discharge hole communicated with the inner container; wet sludge put into the reaction cylinder from a material inlet and a self-heating drier are subjected to hydration heating reaction to obtain wet crushed sludge, wherein high-temperature steam generated by the reaction is discharged into the interlayer channel through the exhaust pipe to be recycled as a gas heat source; and the wet crushed mud after the reaction is put into the inner container from the reaction discharge hole, and the wet crushed mud exchanges heat with the gas heat source of the interlayer channel along with the rotation action of the inner container.

Description

Drying device suitable for wet sludge

Technical Field

The utility model relates to a technical field of sludge treatment equipment especially indicates a mummification device suitable for wet mud.

Background

How to effectively recycle and treat wet sludge is a subject of continuous research in the field of environmental protection, and various technical modes are applied in the market: drying, burning, landfill, composting as organic fertilizer and the like, but the utilization effect is not ideal, wherein the drying and burning modes have large energy consumption and high operation cost; the landfill mode occupies land and causes secondary pollution; the method of composting organic fertilizer has the risk of influencing the quality of crops, and the purposes of energy conservation, environmental protection and resource recycling are not achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a mummification device suitable for wet mud, possess energy-conservation, environmental protection, efficient characteristics.

In order to achieve the purpose, the drying device suitable for wet sludge provided by the utility model comprises a reactor and a thermalization dryer, wherein the top of the reactor is provided with a material inlet and an exhaust pipe; the thermalization dryer comprises an inner container and a sleeve which are coaxially arranged inside and outside in a sealing manner, and the inner container can rotate around a central shaft relative to the sleeve; an interlayer channel for an external gas heat source to flow through is formed between the inner wall of the sleeve and the outer wall of the inner container; the front end and the rear end of the sleeve are respectively provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the interlayer channel, and the air inlet is communicated with the exhaust pipe; the bottom of the reactor is provided with a reaction discharge hole communicated with the inner container; wet sludge put into the reaction cylinder from a material inlet and a self-heating drier are subjected to hydration heating reaction to obtain wet crushed sludge, wherein high-temperature steam generated by the reaction is discharged into the interlayer channel through the exhaust pipe to be recycled as a gas heat source; and the reacted wet crushed mud is put into the inner container from the reaction discharge hole, and the wet crushed mud exchanges heat with the gas heat source of the interlayer channel along with the rotation action of the inner container.

Furthermore, a crushing and stirring knife set is arranged in the reaction cylinder, wherein wet sludge and the self-heating drier which are put into the reaction cylinder from a material inlet are crushed and stirred under the action of the crushing and stirring knife set.

Further, the crushing and stirring knife bank is provided with a rotary driving unit for driving the crushing and stirring knife bank to rotate directionally.

Furthermore, a discharge gate capable of being opened and closed movably is arranged at the discharge port.

Furthermore, the discharging gate is provided with a discharging telescopic unit for driving the discharging gate to turn around a fixed point.

Further, the inner wall shaping of inner bag has the spiral gallery, wherein, the wet garrulous mud of delivering into the inner bag by the feed inlet is along with spiral type gallery auger delivery towards the discharge gate direction.

Further, a heat storage metal net is filled in the interlayer channel, wherein the heat storage metal net is tightly attached to and wraps the outer wall of the inner container.

Further, the tail end of the inner container extends to the outside of the sleeve, wherein the overlapped area of the inner container and the sleeve is used as a thermalization section, the area of the inner container extending to the outside of the sleeve is used as a heat dissipation section, and the outer wall of the sleeve is coated with a heat insulation layer.

Further, the tail end of the inner container is provided with a suction fan cover.

Furthermore, the inner container is provided with an inner container driving unit which can drive the inner container to rotate around the central shaft.

The utility model adopts the above technical scheme, its beneficial effect lies in: wet sludge and self-heating drying agent are crushed, stirred and pretreated by the reactor, and then the generated high-temperature steam is conveyed into the interlayer channel to be recycled as a gas heat source, so that the wet crushed sludge material is subjected to thermalization drying treatment, and the method has the characteristics of high efficiency, energy conservation, environmental protection and the like.

Drawings

Fig. 1 is a schematic view of a drying apparatus.

Fig. 2 is a schematic view of a thermalizing dryer.

Fig. 3 is a side view of a thermalizing dryer.

Fig. 4 is an enlarged view of a portion a in fig. 2.

Fig. 5 is a front sectional view of the reactor.

Fig. 6 is a side sectional view of the reactor.

The device comprises a 10-thermalization dryer, a 11-sleeve, a 111-air inlet, a 112-air outlet, a 12-inner container, a 121-feed inlet, a 122-inner container discharge outlet, a 123-spiral tunnel, a 13-heat storage metal net, a 14-suction fan cover, a 15-negative pressure draught fan, a 16-inner container driving unit, a 30-heat insulation layer, a 20-reaction cylinder, a 201-material inlet, a 202-reaction discharge outlet, a 21-discharge gate, a 211-discharge telescopic unit, a 22-crushing stirring cutter set, a 221-rotation driving unit and a 23-exhaust pipe.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1-6, a drying apparatus for wet sludge includes a reactor and a thermalizing dryer 10. The reactor comprises a reaction cylinder 20, a crushing stirring cutter set 22 and a rotary driving unit 221, wherein the reaction cylinder 20 is of an elliptic cylinder structure with a cavity, and the outer wall of the metal material and the outer wall of the cylinder body of the metal material are coated with an insulating layer for reducing heat energy loss. The thermalization dryer 10 comprises an inner container 12 and a sleeve 11, wherein the inner container 12 and the sleeve 11 are both in a right-circular-cylinder-shaped structure and are made of metal materials, the sleeve 11 is sleeved on the periphery of the inner container 12 to achieve coaxial internal and external sealing arrangement of the inner container and the sleeve, and the connection position of the end part of the sleeve 11 and the outer wall of the inner container 12 can be hermetically connected in a sealing mode such as a sealing rubber block and the like, and is not limited here and is selected as required.

In this embodiment, the crushing and stirring knife assembly 22 is disposed in the reaction cylinder 20, wherein the crushing and stirring knife assembly 22 includes a knife shaft and a plurality of crushing knives mounted on the knife shaft, wherein the knife shaft extends along a transverse direction, and two ends of the knife shaft respectively extend through the outside of the reaction cylinder 20 to connect with a preset bearing seat, so as to realize the rotational connection between the knife shaft and the reaction cylinder 20; one end of the knife shaft is in transmission connection with a rotation driving unit 221 arranged on the periphery of the reaction cylinder 20, so that the knife shaft is driven to rotate by the rotation driving unit 221. Secondly, each crushing cutter is arc-shaped, and the outer end part of each crushing cutter is provided with a transverse cutter which extends along the axial direction of the parallel cutter shaft,

specifically, the cutter shafts are driven to rotate at high speed by the rotation driving unit 221, so that the crushing cutters are driven to rotate rapidly in the reaction cylinder 20 synchronously, wet sludge is cut, crushed and stirred conveniently, the problem of bonding of the wet sludge is solved, and meanwhile, the transverse cutters are utilized to throw and turn over wet sludge synchronously, so that the wet sludge is prevented from agglomerating.

Further, the rotation driving unit 221 of the present embodiment may employ a reduction motor.

In this embodiment, the inner container 12 can rotate around a central axis relative to the sleeve 11, wherein the inner container 12 is provided with an inner container driving unit 16 capable of driving the inner container 12 to rotate around the central axis, specifically, the inner container driving unit 16 of this embodiment includes a speed reduction motor of the inner container 12 and a transmission gear sleeved on the inner container 12, an output shaft of the speed reduction motor of the inner container 12 is sleeved with a driving gear, and the driving gear is meshed with the transmission gear for transmission, so that the inner container 12 can rotate under the driving of the speed reduction motor of the inner container 12.

In this embodiment, a top material inlet 201 of the reaction cylinder 20 and at least one exhaust pipe 23 led out outwards are provided, wherein the material inlet 201 is used for throwing wet sludge and self-heating drying agent into the reaction cylinder 20, one or more than two material inlets 201 may be correspondingly provided according to actual conditions, the wet sludge and the self-heating drying agent may be thrown from the same material inlet 201, or the wet sludge and the self-heating drying agent may be thrown from different material inlets 201, and the above is not limited herein as required.

In this embodiment, an interlayer channel is formed between the inner wall of the sleeve 11 and the outer wall of the inner container 12, the interlayer channel can be used for an external gas heat source to flow through, and the gas heat source can release heat in the interlayer channel, so that the heat energy is conducted to the inner cavity through the outer wall of the inner container 12. Specifically, the front end and the rear end of the sleeve 11 are respectively provided with an air inlet 111 and an air outlet 112, the air inlet 111 is communicated with the exhaust pipe 23, so that high-temperature water vapor exhausted by the exhaust pipe 23 is used as a gas heat source and is sent into the interlayer channel through the air inlet 111, the air outlet 112 can be externally connected with a negative pressure induced draft fan 15, and the gas heat source is exhausted from the air outlet 112 after passing through the interlayer channel under the action of negative pressure.

In the present embodiment, a reaction outlet 202 is disposed at the bottom of the reaction cylinder 20, wherein the reaction outlet 202 is configured with an outlet gate 21 capable of being opened and closed movably. Specifically, the discharge gate 21 is configured with a discharge telescopic unit 211 for driving the discharge telescopic unit to perform a turning motion around a fixed point, the discharge telescopic unit 211 of this embodiment is preferably a telescopic cylinder, the tail end of the discharge telescopic unit 211 is hinged to the outer wall of the reaction cylinder 20, the telescopic end of the discharge telescopic unit is hinged to a rotary arm of force preformed on the discharge gate 21, and the fixed point of the rotary arm of force is hinged to the outer wall of the reaction cylinder 20, so that the turning motion of the discharge gate 21 around the fixed point is realized through the telescopic motion of the discharge telescopic unit 211, and further, the opening/closing motion of the reaction discharge port 202 is realized.

In this embodiment, two ends of the inner container 12 are respectively provided with a feeding port 121 and an inner container discharging port 122, wherein the feeding port 121 is used for feeding wet crushed mud into the inner container 12, and the inner container discharging port 122 is used for discharging the processed crushed mud material. Specifically, the feed inlet 121 of the inner container 12 is communicated with the reaction discharge port 202 of the reaction cylinder 20, so that the wet crushed sludge treated by the reaction cylinder 20 is fed into the inner container 12 through the feed inlet 121.

In this embodiment, a spiral tunnel 123 is formed on the inner wall of the inner container 12, and the wet crushed mud delivered from the inlet 121 to the inner container 12 can be spirally conveyed toward the outlet 122 of the inner container along with the spiral tunnel 123 by the rotation of the inner container 12 and the cooperation with the spiral tunnel 123. Meanwhile, the wet crushed mud continuously contacts the inner wall of the inner container 12 with temperature during conveying, so that the wet crushed mud exchanges heat with a gas heat source of the interlayer channel through the inner container 12 during conveying, and the residual moisture of the wet crushed mud absorbs heat and evaporates.

To facilitate understanding of the above-described reactor, the following is further explained in conjunction with a specific working principle.

When the device works, the discharging gate 21 is firstly closed and the rotary driving unit 221 is started; then, wet sludge and self-heating drying agent are put into the reaction cylinder 20 from the material inlet 201, the crushing and stirring cutter set 22 at the moment can crush and stir the wet sludge, and the self-heating drying agent can be fully contacted with moisture in the wet sludge to generate hydration heating reaction, so that a large amount of heat is released to promote the wet sludge to be rapidly heated to more than 80 ℃, and the moisture in the wet sludge is heated, evaporated and converted into high-temperature steam; with the continuous crushing and stirring actions of the crushing and stirring knife set 22, the wet sludge and the self-heating drier can be fully mixed and reacted; a large amount of water vapor generated during the process can be discharged out of the reaction cylinder 20 through the exhaust pipe 23 (the heat energy of the water vapor can be recycled or environmentally treated); finally, when the preset stirring and crushing effect or time is reached, the discharge gate 21 can be opened to discharge the wet crushed mud and other materials from the discharge port.

In this embodiment, the self-heating drying agent used in the above-mentioned method is composed of inorganic minerals and metal powder, and its main material components include calcium carbonate, ferric oxide and aluminum powder, and the component ratio is determined by the water content of the actual wet sludge, which is not limited herein. Specifically, the temperature in the reaction cylinder 20 is firstly increased to more than 80 ℃ as the excitation temperature of the subsequent aluminothermic reaction by utilizing the characteristic that the calcium carbonate is contacted with water to generate hydration reaction and has heat release and temperature rise, and the temperature in the reaction cylinder 20 is increased to more than 150 ℃ again by utilizing the aluminothermic reaction of the aluminum powder and the ferric oxide under higher excitation temperature, so that the water evaporation speed is accelerated, and meanwhile, the generated high temperature can kill bacteria contained in wet sludge at high temperature, and the aims of deodorization, sterilization and water evaporation are finally achieved.

In this embodiment, the aluminum powder and ferric oxide are used in the self-heating drying agent in an amount of 1-5% and 3-10%, respectively, and the amount of the aluminum powder and ferric oxide is relatively small, so that the required excitation temperature for thermite reaction does not need to be too high, and uncontrollable heat energy generated by excessive thermite reaction can be avoided, thereby ensuring the safety performance of the reactor.

In this embodiment, in order to improve the heat conduction effect of the gas heat source in the interlayer channel, the interlayer channel may be filled with the heat storage metal mesh 13, wherein the heat storage metal mesh 13 is tightly attached to the outer wall of the inner container 12, and the heat energy of the gas heat source is absorbed and conducted to the inner container 12 by using the heat conductivity and the heat storage property of the metal material. The heat storage metal mesh 13 of this embodiment is a honeycomb aluminum alloy mesh.

In this embodiment, the heat of the gas heat source is released in the interlayer channel to realize the thermal drying treatment of the wet crushed sludge material, and the wet crushed sludge material is converted into the dried crushed sludge material with the water content lower than 40%.

In this embodiment, the tail end of the inner container 12 extends to the outside of the sleeve 11, wherein the overlapping area of the inner container 12 and the sleeve 11 serves as a thermalization section, and the crushed sludge material in the thermalization section continuously exchanges heat with a gas heat source to perform a thermalization drying function; the area of the inner container 12 extending out of the sleeve 11 is used as a heat dissipation section, the outer wall of the inner container 12 in the heat dissipation end is directly exposed in the air, and at the moment, the heat of the crushed mud material and the inner container 12 can be dissipated into the air, so that the effects of heat dissipation and cooling are achieved.

Further, the outer wall of the sleeve 11 is coated with an insulating layer 30 for reducing heat loss of the thermalization section.

In this embodiment, the tail end of the inner container 12 is provided with a suction hood 14, wherein the suction hood 14 is sleeved on the tail end of the inner container 12, the inner container 12 can rotate relative to the suction hood 14, the suction hood 14 at this time is externally connected to a negative pressure induced draft fan 15 through a pipeline, and the wet vapor and the residual odor in the inner container 12 are exhausted through the negative pressure suction effect.

Further, the wet vapor, the odor and the gas heat source in the sandwich channel in the inner container 12 can be discharged to an additionally configured environmental protection processing device (not shown) by the negative pressure induced draft fan 15 for environmental protection processing, which is not limited herein.

The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents of the embodiments of the invention without departing from the scope of the invention. Therefore, the content of the technical scheme of the utility model, according to the equivalent change made by the idea of the utility model, should be covered in the protection scope of the utility model.

Claims

1. The utility model provides a mummification device suitable for wet sludge which characterized in that: the device comprises a reactor and a thermalization dryer (10), wherein the top of the reactor is provided with a material inlet (201) and an exhaust pipe (23); the thermalization dryer (10) comprises an inner container (12) and a sleeve (11) which are coaxially arranged in an inner and outer sealing mode, wherein the inner container (12) can rotate around a central shaft relative to the sleeve (11); an interlayer channel is formed between the inner wall of the sleeve (11) and the outer wall of the inner container (12); the front end and the rear end of the sleeve (11) are respectively provided with an air inlet (111) and an air outlet (112), the air inlet (111) and the air outlet (112) are communicated with the interlayer channel, and the air inlet (111) is communicated with the exhaust pipe (23); the bottom of the reactor is provided with a reaction discharge hole (202) communicated with the inner container (12); wet sludge put into the reaction cylinder (20) from the material inlet (201) and a self-heating drier are subjected to hydration heating reaction to obtain wet crushed sludge, wherein high-temperature steam generated by the reaction is discharged into the interlayer channel through the exhaust pipe (23) for recycling; and the reacted wet crushed mud is put into the inner container (12) from the reaction discharge hole (202), and the wet crushed mud exchanges heat with the gas heat source of the interlayer channel along with the rotation action of the inner container (12).

2. The drying device for wet sludge according to claim 1, wherein: a crushing and stirring knife set (22) is arranged in the reaction cylinder (20), wherein wet sludge and the self-heating drier which are put into the reaction cylinder (20) from the material inlet (201) are crushed and stirred under the action of the crushing and stirring knife set (22).

3. The drying device for wet sludge according to claim 2, wherein: the crushing and stirring knife group (22) is provided with a rotary driving unit (221) for driving the crushing and stirring knife group to rotate directionally.

4. The drying device for wet sludge according to claim 1, wherein: the discharge port is provided with a discharge gate (21) which can be opened and closed movably.

5. The drying device for wet sludge according to claim 4, wherein: the discharging gate (21) is provided with a discharging telescopic unit (211) for driving the discharging gate to perform overturning motion around a fixed point.

6. The drying device for wet sludge according to claim 1, wherein: the inner wall of the inner container (12) is formed with a spiral tunnel (123), wherein wet crushed mud delivered to the inner container (12) from the feed inlet (121) is spirally conveyed towards the discharge outlet along with the spiral tunnel.

7. The drying device for wet sludge according to claim 1, wherein: the heat storage metal net (13) is filled in the interlayer channel, wherein the heat storage metal net (13) is tightly attached to and covers the outer wall of the inner container (12).

8. The drying device for wet sludge according to claim 1, wherein: the tail end of inner bag (12) extends to outside sleeve (11), wherein, the regional thermalization section as with sleeve (11) overlap of inner bag (12), the regional heat dissipation section as that inner bag (12) extend to outside sleeve (11), the outer wall cladding of sleeve (11) has heat preservation (30).

9. The drying device for wet sludge according to claim 1, wherein: the tail end of the inner container (12) is provided with a suction fan cover (14).

10. The drying device for wet sludge according to claim 1, wherein: the inner container (12) is provided with an inner container driving unit (16) which can drive the inner container to rotate around a central shaft.