CN113440966B - Automatic bottom dedusting system and method for sludge low-temperature drying equipment - Google Patents
Automatic bottom dedusting system and method for sludge low-temperature drying equipment Download PDFInfo
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- CN113440966B CN113440966B CN202110845325.XA CN202110845325A CN113440966B CN 113440966 B CN113440966 B CN 113440966B CN 202110845325 A CN202110845325 A CN 202110845325A CN 113440966 B CN113440966 B CN 113440966B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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Abstract
The invention discloses an automatic dust removal system and method for the bottom of sludge low-temperature drying equipment, which comprises a drying room, wherein a multi-stage dust collection part is arranged in the drying room and is connected with a pneumatic conveying part connected with the drying room, the invention monitors the dust accumulation thickness in the drying room in real time through the multi-stage dust collection part, avoids the problems that the normal use and the internal wind flow of a fan are influenced by the raised dust caused by more dust accumulation and the dust cleaning effect, provides a stable wind channel for the fan operation and the dust cleaning, guides the circulating air in the drying room to clean the dust and gather for collection and transportation, avoids the problems that the cleaning frequency is high and the efficiency is low and the personnel health is influenced by manual cleaning, and avoids the problems that the dust enters a host system to cause dust collection and corrosion to influence the normal operation of the equipment, the efficiency of sludge drying is improved and the maintenance cost of the machine is reduced.
Description
Technical Field
The invention relates to the technical field of sludge drying, in particular to a system and a method for automatically removing dust from the bottom of a low-temperature sludge drying device.
Background
Sludge is solid sediment substances generated in the sewage treatment process, is thick substances between liquid and solid, contains a large amount of harmful substances and needs to be treated to avoid harm to the environment, and the sludge is dried in a sludge treatment mode, so that the transportation cost and the processing energy consumption of the sludge can be reduced.
The low-temperature sludge drying equipment comprises a heat pump host and a drying room part, air is dried through the heat pump host, and the water is removed by heating sludge through circulating air, a large amount of dust can be generated in the sludge drying process, the low-temperature sludge drying adopts a closed air internal circulation mode to dry the sludge, more dust is accumulated in the equipment, especially, the dust at the dead corner in the equipment is more difficult to clean, the sludge drying effect is influenced, the cleaning frequency is high through manual cleaning, the efficiency is low, and the influence on the health of personnel can be generated, therefore, the automatic dust removing system and the automatic dust removing method at the bottom of the low-temperature sludge drying equipment need to be designed.
Disclosure of Invention
The invention aims to provide an automatic bottom dust removal system and method for a sludge low-temperature drying device, and solves the problems that the sludge drying effect is influenced by dust accumulation in the conventional sludge low-temperature drying device, the cleaning frequency is high, the efficiency is low and the influence on the health of personnel is caused when the sludge is manually cleaned.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
the utility model provides an automatic dust pelletizing system in mud low temperature mummification equipment bottom, includes the baking house, be provided with multistage collection dirt part in the baking house, multistage collection dirt part be connected with the pneumatic defeated material part that the baking house is connected, just multistage collection dirt part is right the inside dust of baking house is piled up thickness and is detected and right through guide inside circulating air the inside dust clearance of baking house gathers to appointed area, pneumatic defeated material part negative pressure adsorbs the dust and carries the collection.
As a preferred scheme of the invention, the multistage dust collecting part comprises a fan arranged in the drying room, a dust collecting groove arranged on the bottom in the drying room along a direction perpendicular to the blowing direction of the air flow of the fan, and an induction element arranged on the inner wall of the drying room and used for detecting the accumulation thickness of dust, wherein a guide plate arranged on the bottom in the drying room is obliquely arranged on the outer side of a notch of the dust collecting groove, and an air knife arranged on an feeding section and a discharging section on the bottom in the drying room and used for assisting the fan in cleaning dust by compressed air flow is arranged on the other side outside the notch of the dust collecting groove;
the pneumatic conveying part is connected with the dust collecting groove, when the sensing element detects that the dust accumulation thickness in the drying room reaches a certain thickness, the fan and the air knife generate wind airflow to clean and guide dust to impact the guide plate to perform gas-solid separation, and the separated dust is collected to the dust collecting groove along the guide plate under the action of gravity.
As a preferable scheme of the present invention, the dust collecting tank is provided with a dust removing screw along a length direction, the dust collecting tank is provided with a dust suction port which is controlled to open and close by an electric ball valve, the pneumatic conveying member is connected to the dust suction port, and the dust removing screw pushes dust in the dust collecting tank to gather to the dust suction port and is transported after being adsorbed by the pneumatic conveying member under negative pressure.
In a preferred embodiment of the present invention, the notch of the dust collecting groove is connected to the lowest horizontal side of the deflector, and an arc chamfer is provided at the connection between the deflector and the dust collecting groove.
As a preferable scheme of the invention, a plurality of secondary separation grooves are arranged on the airflow contact surface of the guide plate at equal intervals along the horizontal direction, arc-shaped transition is arranged between the inner side wall of the secondary separation groove close to the dust collecting groove and the outer wall of the guide plate, and an extension plate is arranged and extends outwards along the horizontal direction at one side of the secondary separation groove far away from the dust collecting groove;
the higher one side of level is outer circular arc form on the epitaxial plate, just wind-force air current via the arc transition extremely in the secondary separating tank with the epitaxial plate and be provided with the epitaxial plate the inner wall of secondary separating tank takes place to strike and carries out secondary gas-solid separation.
As a preferable scheme of the invention, two elastic connecting plates are arranged along the horizontal direction at the part of the airflow contact surface of the guide plate, which is higher than the secondary separation tank in the horizontal height, a filter screen is jointly arranged between the two elastic connecting plates, a pneumatic vibrator is arranged on one of the elastic connecting plates, the filter screen filters and separates dust from the airflow, and the pneumatic vibrator intermittently drives the elastic connecting plates to vibrate and clean the dust adhered to the filter screen and the guide plate.
As a preferable scheme of the present invention, the pneumatic material conveying component includes a gas conveying pipe through which compressed air is introduced and a pneumatic conveyor provided on the gas conveying pipe and used for conveying the compressed air, the gas conveying pipe is communicated with a negative pressure dust suction pipe, the negative pressure dust suction pipe is communicated with the dust suction port, and the negative pressure dust suction pipe generates negative pressure through high-speed movement of the compressed air in the gas conveying pipe to suck dust in the dust suction port into the gas conveying pipe and conveys the dust to a corresponding area through the compressed air to be collected.
As a preferable mode of the present invention, the negative pressure dust suction pipe includes a connection section and an inclined section, the connection section is communicated with the dust suction port, the inclined section is communicated with the air delivery pipe and the connection section, and an angle formed by a center line direction of the inclined section and a flow direction of compressed air in the air delivery pipe is smaller than 90 degrees.
As a preferable scheme of the present invention, an output end of the air delivery pipe is connected to a cyclone separator, one end of the cyclone separator is communicated with the inside of the drying room, and the cyclone separator separates dust in an air flow in the air delivery pipe and returns the air flow to the drying room.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
a dust removing method of an automatic dust removing system at the bottom of a low-temperature sludge drying device, which comprises the following steps,
s100, when the dust accumulation thickness in the drying room monitored by the sensing element is larger than a preset value, starting a fan, filling air into an air knife, cleaning and blowing dust by compressed air flow generated by the wind power of the fan and the air knife, and separating the dust by a guide plate to collect in a dust collecting groove;
s200, starting a dust removal screw to push dust to a dust suction port, opening the dust suction port by an electric ball valve, introducing compressed air into a conveying air pipe by a pneumatic conveyor to adsorb the dust in the dust suction port and conveying the dust to a corresponding area;
s300, opening the cyclone separator to separate dust and airflow in the conveying air pipe, and introducing the separated airflow into the drying room.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the dust accumulation thickness in the drying room is monitored in real time through the multi-stage dust collection component, so that the problems that the normal use of a fan and the internal wind flow are influenced due to raised dust caused by more dust accumulation and the dust cleaning effect are avoided, a stable wind channel is provided for the fan operation and the dust cleaning, then circulating air in the drying room is guided to clean dust and gather for collection and transportation, the problems of high cleaning frequency and low efficiency and influence on personnel health caused by manual cleaning are avoided, the problem that the normal operation of equipment is influenced by dust collection and corrosion caused by dust entering a host system is avoided, the sludge drying efficiency is improved, and the machine maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic structural diagram of an automatic bottom dedusting system of a low-temperature sludge drying apparatus according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a portion a shown in fig. 1 according to an embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1-a drying room; 3-pneumatic conveying parts;
201-a fan; 202-dust collecting groove; 203-a flow guide plate; 204-an air knife; 205-dedusting screw; 206-dust absorption port; 207-secondary separation tank; 208-arc transition; 209-epitaxial plate; 210-an elastic web; 211-sieve; 212-a pneumatic vibrator; 213-an inductive element;
301-a gas delivery pipe; 302-pneumatic conveyor; 303-negative pressure dust suction pipe; 304-a connecting segment; 305 — oblique segment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1:
as shown in the figures 1 and 2, the invention provides an automatic bottom dust removal system of a low-temperature sludge drying device, which comprises a drying room 1, wherein a multi-stage dust collection part is arranged in the drying room 1, the multi-stage dust collection part is connected with a pneumatic conveying part 3 connected with the drying room 1, the multi-stage dust collection part detects the accumulation thickness of dust in the drying room 1 and cleans and gathers the dust in the drying room to a designated area by guiding internal circulating air, and the pneumatic conveying part 3 adsorbs the dust under negative pressure for conveying and collecting.
When the dust cleaning device is used, the multi-stage dust collecting part guides the circulating air in the drying room 1 to blow and clean the dust in the drying room, so that the dust is gathered to a designated area along with the movement of air flow, and the pneumatic conveying part 3 adsorbs the dust in a negative pressure adsorption mode to convey the dust, thereby finishing cleaning the dust in the drying room 1.
The invention avoids the problems of high cleaning frequency and low cleaning efficiency in manual cleaning and the harm of volatile harmful substances and dust to the human body in the sludge drying process, and also avoids the problem of generating the influence of dust on the surrounding environment by adsorbing and transporting the dust in a negative pressure adsorption mode.
Further, a plurality of the multi-stage dust collecting part and the pneumatic conveying part 3 may be provided to improve the cleaning effect and the cleaning speed of the dust inside the inner drying room 1.
The multistage dust collection part comprises a fan 201 arranged in the drying room 1, a dust collection groove 202 arranged at the bottom in the drying room 1 along the air flow blowing direction perpendicular to the fan 201, and an induction element 213 arranged on the inner wall of the drying room 1 and used for detecting the dust accumulation thickness, a guide plate 203 arranged at the bottom in the drying room 1 is obliquely arranged on the outer side of a notch of the dust collection groove 202, and an air knife 204 which is arranged at the bottom in the drying room 1 and used for assisting the fan 201 in cleaning dust in a compressed air flow is arranged on the other side outside the notch of the dust collection groove 202.
Wherein, the pneumatic conveying part 3 is connected with the dust collecting groove 202, and when the sensing element 213 detects the dust accumulation thickness in the drying room 1 to a certain thickness, the fan 201 and the air knife 204 generate wind airflow to clean and guide the dust to impact the guide plate 203 for gas-solid separation, and the separated dust is collected along the guide plate 203 to the dust collecting groove 202 by gravity.
When the multi-stage dust collecting component is used, firstly, the thickness of dust accumulated at the bottom in the drying room 1 is detected by the sensing element 213, and when the accumulated thickness of the dust reaches a preset value, the multi-stage dust collecting component is started.
Wind power generated by the fan 201 carries dust to move to the guide plate 203 to generate impact, wind power airflow moves upwards along the inclined plane on the guide plate 203 to cause the wind speed to slow down, the dust carried in the airflow also impacts the surface of the guide plate 203, dust particles are separated from the airflow by gravity and slide down along the surface of the guide plate 203 to the inside of the dust collection groove 202 to be collected, the dust in the drying room 1 is cleaned and collected into the dust collection groove 202, and the pneumatic conveying part 3 adsorbs and transfers the dust to a corresponding collection area through negative pressure.
Because there are blind area and dead angle position in the air current of fan 201 at the inside flow of baking house 1, and partial large granule dust is difficult to be cleared up by the air current that fan 201 produced, lead to partial regional dust to pile up more unable quilt clearance, compress the thin air current of formation high pressure through air knife 204 to the wind-force of input, promote the gas flow rate, the reinforcing is to the cleaning strength of inside dust, and sets up in corresponding position, further guarantees the cleaning effect of the inside dust of baking house 1.
The baffle 203 is arranged obliquely for separating dust from the air flow without affecting the circulation of the internal air flow.
Fan 201 is the equipment that can purchase now, and for all devices in the mud low temperature mummification equipment baking house 1 part, has promoted fan 201's utilization ratio, and makes the combination degree of multistage collection dirt part and baking house 1 higher, and the space occupies littleer.
Sensing element 213 is the sensor, can pile up the change of thickness to the dust in the baking house 1 and monitor, for example the change of distance between the monitoring of laser rangefinder sensor and the dust, starts multistage collection dirt part clearance dust when the interval is less than a definite value, and the sensor that can monitor the dust and pile up the thickness change is all right in the in-service use.
The dust collecting groove 202 is perpendicular to the airflow direction of the fan 201, so that the length of a collecting area can be enlarged, and dust can be collected more effectively.
In practical use, the dust removal time of each time of the multi-stage dust collection component is about 180 seconds to 240 seconds, the conveyed dust is about 40 liters, dust cleaning is sequentially carried out in a drying room provided with a plurality of multi-stage dust collection components, the dust cleaning time and the dust cleaning effect are improved, the dust removal frequency of one time a day, multiple times a day and multiple times a day or multiple times a day can be maintained, and the dust removal frequency is specifically set according to the dust concentration.
Secondly, the gas consumption of a single gas knife is about 4 cubes per minute for a duration of about 1 minute.
The dust collection groove 202 is provided with a dust removal screw 205 along the length direction, a dust suction port 206 controlled to be opened and closed by an electric ball valve is arranged in the dust collection groove 202, the pneumatic conveying component 3 is connected with the dust suction port 206, and the dust removal screw 205 pushes dust in the dust collection groove 202 to be gathered to the dust suction port 206 and is transported after being adsorbed by the pneumatic conveying component 3 under negative pressure.
Secondly, considering that the dust collecting groove 202 has a long length and affects the negative pressure adsorption effect of the pneumatic conveying component 3, the dust collecting groove is provided with a dust suction port 206 and a dust removing screw 205, the dust removing screw 205 is driven by a driving device to rotate and push the dust in the dust collecting groove 202 to be collected at the dust suction port 206, so that the negative pressure adsorption effect of the pneumatic conveying component 3 is maximized, and the dust in the dust collecting groove 202 can be effectively cleaned.
Secondly, the opening and closing of the dust suction port 206 is controlled by the electric ball valve, so that the sealing state of the interior of the drying room 1 during normal work is ensured.
The notch of the dust collection groove 202 is connected with the side of the guide plate 203 with the lowest horizontal height, and the connection part of the guide plate 203 and the dust collection groove 202 is provided with an arc chamfer.
The guide plate 203 is connected with the notch of the dust collection groove 202 and provided with the arc chamfer, so that the situation that part of dust cannot completely enter the dust collection groove 202 and stays at the joint of the dust collection groove 202 and the guide plate 203 due to the fact that the dust is blocked when sliding along the surface of the guide plate 203 is avoided, and the dust collection effect is improved.
A plurality of secondary separation grooves 207 are arranged on the airflow contact surface of the guide plate 203 at equal intervals along the horizontal direction, arc-shaped transition 208 is arranged between the inner side wall of the secondary separation groove 207 close to the dust collection groove 202 and the outer wall of the guide plate 203, and an extension plate 209 is arranged in the secondary separation groove 207 along the horizontal direction and extends outwards from one side far away from the dust collection groove 202;
the side of the extension plate 209 with the higher horizontal height is in an outer arc shape, and the wind airflow is in an arc transition 208 to the secondary separation tank 207 and impacts with the extension plate 209 and the inner wall of the secondary separation tank 207 provided with the extension plate 209 to perform secondary gas-solid separation.
Considering that after the gas flow impacts the surface of the flow guide plate 203 to perform gas-solid separation, part of dust is carried in the gas flow rising along the surface of the flow guide plate 203, and the dust enters other areas along with the gas flow to affect normal operation.
Through the secondary separating tank 207 who sets up, the air current that flows along guide plate 203 surface leads to inside the secondary separating tank 207 through arc transition 208, and take place to strike with the inner wall of secondary separating tank 207 and the surface of epitaxial plate 209 and carry out secondary gas-solid separation, the dust bumps the back because self inertia and action of gravity with the air current separation and along guide plate 203 surface landing to the dust collecting tank 202 in, the air current moves to guide plate 203 along the epitaxial plate 209 and continues to flow on the surface, the separation effect to carrying the dust in the air current has further been promoted through the setting of a plurality of secondary separating tanks 207.
Secondly, the top of epitaxial plate 209 is outer circular arc form, and the dust that the separation dropped is gathered to dust collecting tank 202 in along guide plate 203 landing through self gravity and circular-arc surface guide, has avoided the dust to pile up and has influenced dust separation and clearance effect at epitaxial plate 209 top, and has great impact between epitaxial plate 209 level setting and the air current, further promotes the separation effect between dust and the air current.
The gas flow contact surface of the baffle 203 is the surface where the baffle 203 impacts the gas flow to perform gas-solid separation.
Two elastic connecting plates 210 are arranged on the part of the airflow contact surface of the guide plate 203, the horizontal height of which is greater than that of the secondary separation groove 207, along the horizontal direction, a filter screen 211 is jointly arranged between the two elastic connecting plates 210, a pneumatic vibrator 212 is arranged on one of the elastic connecting plates 210, the filter screen 211 filters and separates dust from airflow, and the pneumatic vibrator 212 intermittently strikes the elastic connecting plates 210 to generate vibration to clean the dust adhered to the filter screen 211 and the guide plate 203.
Considering that the smaller and the great dust of stickness of some granule easily adheres inside guide plate 203 surface and secondary separating tank 207, not only influence the clearance effect of inside dust, and can produce raise dust and get into other regional influences normal operating under the drive of air current, secondly further can influence the separation effect of guide plate 203 and secondary separating tank 207 dust in to the air current.
Therefore, the elastic connecting plate 210 is driven to deform by driving the pneumatic vibrator 212 to circularly and intermittently drive, the elastic connecting plate 210 is reciprocated in the process of restoring the deformation to form a vibration effect to clean the dust adhered to the filter screen 211, and then the vibration is transmitted to the guide plate 203, so that the guide plate 203 vibrates to clean the dust on the surface and inside the secondary separation groove 207, the cleaned dust is collected by the dust collection groove 202 through the surface of the guide plate 203 in a sliding manner, the cleaning effect on the dust inside the drying room 1 is further improved, and the separation effect of the guide plate 203 and the secondary separation groove 207 on the dust is ensured.
Meanwhile, the filter screen 211 is arranged between the two elastic connecting plates 210 to filter and separate dust from the air flow again, so that the dust separating effect in the air flow is further improved.
The pneumatic conveying component 3 comprises a conveying air pipe 301 communicated with compressed air and a pneumatic conveyor 302 arranged on the conveying air pipe 301 and used for conveying the compressed air, a negative pressure dust suction pipe 303 is communicated with the conveying air pipe 301, the negative pressure dust suction pipe 303 is communicated with the dust suction port 206, the negative pressure dust suction pipe 303 generates negative pressure through high-speed movement of the compressed air in the conveying air pipe 301 to suck dust in the dust suction port 206 into the conveying air pipe 301, and the dust is conveyed to a corresponding area through the compressed air and collected.
When the pneumatic conveying component 3 conveys dust, high-speed compressed air is conveyed in the conveying air pipe 301 through the pneumatic conveyor 302, the compressed air passes through the communication part of the negative pressure dust suction pipe 303 and the conveying air pipe 301 at a high speed, so that dust accumulated in the negative pressure absorption dust suction port 206 is formed in the negative pressure dust suction pipe 303, and the dust is absorbed into the conveying air pipe 301 through negative pressure and mixed with air flow formed by the compressed air, and is conveyed to a corresponding area through the conveying air pipe 301 to be collected.
Carry the dust through the mode of negative pressure absorption and avoided causing the dust to scatter all around and produce the raise dust, not only influence the environment and influence dust clearance effect.
In practical use, the gas consumption of the single pneumatic conveyor 302 is about 1.5 cubic meters per minute with a gas supply of 0.6 mpa, and if 5 pneumatic conveyors 302 are provided, the gas consumption is superimposed, with the duration superimposed.
The negative pressure dust suction pipe 302 comprises a connecting section 304 and an inclined section 305, the connecting section 304 is communicated with the dust suction port 206, the inclined section 305 is communicated with the conveying air pipe 301 and the connecting section 304, and the central line direction of the inclined section 305 and the flow direction of the compressed air in the conveying air pipe 301 form an angle smaller than 90 degrees.
The inclined section 305 and the flow direction of the compressed air in the conveying pipeline 301 form an acute angle, so that negative pressure is more conveniently formed in the inclined section 305 of the negative pressure dust suction pipe 303 by high-speed air, a better negative pressure adsorption effect is achieved, and blocking interference of the communicated part of the inclined section 305 and the conveying pipeline 301 on dust can be reduced.
The output end of the air conveying pipe 301 is connected with a cyclone separator, one end of the cyclone separator is communicated with the interior of the drying room 1, and the cyclone separator separates dust in air flow in the air conveying pipe 301 and returns the air flow to the drying room 1.
Can carry on the gas-solid separation to the high-speed air current that carries the dust in carrying trachea 301 through the cyclone that sets up to the air current cyclic utilization who separates, and avoid the air current to produce the impact to the dust of collecting and cause the raise dust, also can produce the deodorization effect simultaneously.
Example 2:
the invention also provides a dust removing method of the automatic dust removing system at the bottom of the sludge low-temperature drying equipment, which comprises the steps of,
s100, when the dust accumulation thickness in the drying room monitored by the sensing element is larger than a preset value, starting a fan, filling air into an air knife, cleaning and blowing dust by compressed air flow generated by the wind power of the fan and the air knife, and separating the dust by a guide plate to collect in a dust collecting groove;
s200, starting a dust removal screw to push dust to a dust suction port, opening the dust suction port by an electric ball valve, introducing compressed air into a conveying air pipe by a pneumatic conveyor to adsorb the dust in the dust suction port and conveying the dust to a corresponding area;
s300, opening the cyclone separator to separate dust and airflow in the conveying air pipe, and introducing the separated airflow into the drying room.
In S200, when there is a lot of dust inside the drying room 1, the air knife 204, the dust removing screw 205 and the dust suction port 206 may be simultaneously opened to increase the dust cleaning speed.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (7)
1. The utility model provides an automatic dust pelletizing system in mud low temperature mummification equipment bottom which characterized in that: the drying room comprises a drying room (1), wherein a multi-stage dust collecting part is arranged in the drying room (1), the multi-stage dust collecting part is connected with a pneumatic conveying part (3) connected with the drying room (1), the multi-stage dust collecting part detects the accumulated thickness of dust in the drying room (1) and cleans and gathers the dust in the drying room to a designated area by guiding internal circulating air, and the pneumatic conveying part (3) adsorbs the dust under negative pressure to convey and collect;
the multi-stage dust collection part comprises a fan (201) arranged in the drying room (1), a dust collection groove (202) arranged on the inner bottom of the drying room (1) along the direction perpendicular to the air flow blowing direction of the fan (201), and an induction element (213) arranged on the inner wall of the drying room (1) and used for detecting the dust accumulation thickness, wherein a guide plate (203) arranged on the inner bottom of the drying room (1) is obliquely arranged on the outer side of a notch of the dust collection groove (202), and an air knife (204) which is arranged on a feeding section and a discharging section on the inner bottom of the drying room (1) and used for assisting the fan (201) in dust cleaning by compressed air flow is arranged on the other side outside the notch of the dust collection groove (202);
the pneumatic conveying part (3) is connected with the dust collecting groove (202), and when the sensing element (213) detects that the dust accumulation thickness in the drying room (1) reaches a certain thickness, the fan (201) and the air knife (204) generate wind airflow to clean and guide dust to impact the guide plate (203) for gas-solid separation, and the separated dust is collected into the dust collecting groove (202) along the guide plate (203) under the action of gravity;
a plurality of secondary separation grooves (207) are arranged on the airflow contact surface of the guide plate (203) at equal intervals along the horizontal direction, arc-shaped transition (208) is arranged between the inner side wall of the secondary separation groove (207) close to the dust collection groove (202) and the outer wall of the guide plate (203), and an extension plate (209) is arranged along the horizontal direction and extends outwards on one side of the secondary separation groove (207) far away from the dust collection groove (202);
the side, with the higher horizontal height, of the extension plate (209) is in an outer arc shape, and the wind airflow is impacted with the extension plate (209) and the inner wall of the secondary separation tank (207) provided with the extension plate (209) through the arc transition (208) to perform secondary gas-solid separation;
the air current contact surface of guide plate (203) goes up the level and is greater than the part of secondary separating tank (207) is provided with two elastic connection board (210), two along the horizontal direction be provided with filter screen (211) between elastic connection board (210) jointly, one of them be provided with pneumatic vibrator (212) on elastic connection board (210), and filter screen (211) right the air current filters the separation dust, and passes through pneumatic vibrator (212) intermittent drive elastic connection board (210) produce the vibration clearance adhere in filter screen (211) with dust on guide plate (203).
2. The automatic bottom dedusting system for the sludge low-temperature drying equipment according to claim 1, which is characterized in that: dust collecting tank (202) are provided with dust removal spiral (205) along length direction, be provided with in dust collecting tank (202) through dust absorption mouth (206) of electronic ball valve control switching, just pneumatic defeated material part (3) with dust absorption mouth (206) are connected, dust removal spiral (205) promote the inside dust of dust collecting tank (202) gathers to dust absorption mouth (206), and by pneumatic defeated material part (3) negative pressure adsorbs the back transportation.
3. The automatic bottom dedusting system for the sludge low-temperature drying equipment according to claim 2, characterized in that: the notch of the dust collection groove (202) is connected with the side of the guide plate (203) with the lowest horizontal height, and the connection part of the guide plate (203) and the dust collection groove (202) is provided with an arc chamfer.
4. The automatic bottom dedusting system for the sludge low-temperature drying equipment according to claim 2, characterized in that: pneumatic conveying part (3) are in including logical air conveying pipe (301) that have compressed air and setting pneumatic conveyor (302) that are used for carrying compressed air on air conveying pipe (301), the intercommunication has negative pressure dust absorption pipe (303) on air conveying pipe (301), just negative pressure dust absorption pipe (303) with dust absorption mouth (206) intercommunication, negative pressure dust absorption pipe (303) pass through compressed air is in high-speed motion produces the negative pressure absorption in air conveying pipe (301) dust in the dust absorption mouth (206) extremely in air conveying pipe (301), and via compressed air transports to corresponding regional collection.
5. The automatic bottom dedusting system for the sludge low-temperature drying equipment according to claim 4, characterized in that: the negative pressure dust suction pipe (303) comprises a connecting section (304) and an inclined section (305), the connecting section (304) is communicated with the dust suction port (206), the inclined section (305) is communicated with the air conveying pipe (301) and the connecting section (304), and an angle formed by the center line direction of the inclined section (305) and the flowing direction of the compressed air in the air conveying pipe (301) is smaller than 90 degrees.
6. The automatic bottom dedusting system for the sludge low-temperature drying equipment according to claim 5, characterized in that: the output end of the air conveying pipe (301) is connected with a cyclone separator, one end of the cyclone separator is communicated with the interior of the drying room (1), and the cyclone separator separates dust in air flow in the air conveying pipe (301) and returns the air flow to the interior of the drying room (1).
7. The dust removal method applied to the automatic dust removal system at the bottom of the low-temperature sludge drying equipment of any one of claims 1 to 6 is characterized in that: comprises the steps of (a) carrying out,
s100, when the dust accumulation thickness in the drying room monitored by the sensing element is larger than a preset value, starting a fan, filling air into an air knife, cleaning and blowing dust by compressed air flow generated by the wind power of the fan and the air knife, and separating the dust by a guide plate to collect in a dust collecting groove;
s200, starting a dust removal screw to push dust to a dust suction port, opening the dust suction port by an electric ball valve, introducing compressed air into a conveying air pipe by a pneumatic conveyor to adsorb the dust in the dust suction port and conveying the dust to a corresponding area;
s300, opening the cyclone separator to separate dust and airflow in the conveying air pipe, and introducing the separated airflow into the drying room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110845325.XA CN113440966B (en) | 2021-07-26 | 2021-07-26 | Automatic bottom dedusting system and method for sludge low-temperature drying equipment |
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