A smoke purification system for hazardous waste incineration treatment

Abstract

The present application relates to the technical field of flue gas treatment, in particular to a smoke purification system for hazardous waste incineration treatment, which comprises a pretreatment module and a purification module, the pretreated flue gas is transported to the first chamber of the treatment box, when the air extraction assembly extracts air from the second chamber, the flue gas entering the first chamber passes through the side wall of the plastic burning plate into the air guide cavity, the particulate matters in the flue gas are intercepted outside the plastic burning plate, after a period of operation, the air guide cavity is supplied with air by the back blowing assembly, the particulate matters adhering to the outside of the plastic burning plate are separated from the plastic burning plate, the amount of particulate matters adhering to different positions of the plastic burning plate is different, so the degree of blockage of different positions of the plastic burning plate is different, at this time, the back blowing assembly can adjust the air pressure supplied by each communication port into the air guide cavity according to the blockage condition of the plastic burning plate, so as to avoid the condition that the back blowing force of the plastic burning plate is too large or too small, and then ensure that the plastic burning plate maintains good filtering performance, thereby improving the purification efficiency of the flue gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, in particular to a flue dust purification system for hazardous waste incineration treatment. BACKGROUND

[0002] With the acceleration of industrialization, the amount of hazardous waste is increasing, and hazardous waste incineration has become an important harmless disposal method. In the process of hazardous waste incineration, the flue dust purification system is the key link to ensure environmental safety and meet emission standards. The plastic burning plate dust collector is usually used in flue dust purification. The plastic burning plate dust collector uses the microporous structure of the plastic burning plate. Its small pore size can effectively intercept small dust particles. At the same time, the surface coating enhances the adsorption and filtration capacity of harmful substances, thereby achieving efficient flue dust purification. In order to prevent excessive dust accumulation from affecting the filtering performance, the pulse backflush mechanism is started periodically. Through short and strong airflow impact, the dust on the surface of the plastic burning plate is removed, ensuring that the equipment can run continuously and stably, and maintaining good filtering efficiency.

[0003] When the plastic burning plate dust collector is working, the gas flow and composition contacted by the plastic burning plates at different positions are significantly different, which causes different dust accumulation conditions on the surfaces of the plastic burning plates in different regions. When the plastic burning plate is pulse backflushed, it is difficult to find a suitable wind balance point. If the plastic burning plate is backflushed with too strong wind, although most of the dust can be quickly removed, the initial dust layer formed on the surface of the plastic burning plate after long-term operation, which has auxiliary effect on the filtering effect, is easily damaged, reducing the ability to capture fine particles. On the contrary, if the plastic burning plate is backflushed with too weak wind, the dust cannot be completely removed, and the dust gradually accumulates, which will block the micropores, increase the airflow resistance, reduce the equipment running efficiency, and shorten the service life of the plastic burning plate. SUMMARY

[0004] The present application provides a flue dust purification system for hazardous waste incineration treatment to solve the problem of low purification efficiency of existing flue dust purification systems for flue gas generated during hazardous waste incineration.

[0005] The flue dust purification system for hazardous waste incineration treatment provided by the present application adopts the following technical scheme:

[0006] A flue dust purification system for hazardous waste incineration treatment comprises a pretreatment module and a purification module.

[0007] The pretreatment module is used for preliminary treatment of flue gas; the purification module comprises a treatment box, a plastic burning plate, a back blowing assembly and an air extraction assembly; the treatment box is hollow inside, and has a separation sleeve inside, which can separate the inside of the treatment box into a first chamber and a second chamber which are relatively isolated; flue gas treated by the pretreatment module is delivered to the first chamber, and the air extraction assembly is used for extracting gas from the second chamber; the plastic burning plate is provided in multiple, and has a gas guide cavity inside, and the multiple plastic burning plates are fixedly arranged in the first chamber; the plastic burning plate is provided with two communication ports arranged on opposite end faces thereof, and the communication ports are used for communicating the gas guide cavity with the second chamber; the back blowing assembly supplies gas to the gas guide cavity through the two communication ports, and can adjust the gas pressure supplied by each communication port to the gas guide cavity according to the clogging condition of the plastic burning plate.

[0008] Further, the back blowing assembly comprises two back blowing pipes and two guide rails, the guide rails are fixedly arranged in the second chamber, and each back blowing pipe is slidingly arranged along one guide rail; each back blowing pipe can supply gas to the gas guide cavity through one communication port.

[0009] Further, the back blowing assembly further comprises multiple sensing plates, each sensing plate is arranged corresponding to one communication port, and two sensing plates at the two communication ports of the same plastic burning plate are fixedly connected by a connecting rod, and the connecting rod is slidingly connected with the inner side wall of the treatment box; the gas blown by the communication port to the sensing plate can change the distance between the sensing plate and the communication port.

[0010] Further, the back blowing assembly further comprises a control plate and two regulating valves, each regulating valve is arranged on one back blowing pipe, and the regulating valve can affect the conduction degree of the back blowing pipe; the control plate can control the conduction degree of the regulating valve according to the distance between the sensing plate and the communication port.

[0011] Further, the back blowing assembly further comprises two extrusion rods and two regulating valves, each regulating valve is arranged on one back blowing pipe, and the regulating valve can affect the conduction degree of the back blowing pipe; each extrusion rod is arranged on one regulating valve, and the extrusion rod is slidingly connected with the back blowing pipe; the extrusion rod can change the conduction degree of the regulating valve when sliding on the back blowing pipe; the extrusion rod can abut against the sensing plate, and the distance between the sensing plate and the communication port can control the sliding amount of the extrusion rod on the back blowing pipe.

[0012] Further, the back blowing assembly further comprises two auxiliary pipes, each auxiliary pipe is slidingly arranged with one guide rail, and each auxiliary pipe can supply gas to the gas guide cavity through one communication port; the auxiliary pipes are arranged at intervals with the back blowing pipes, and the gas output of each auxiliary pipe is in linear relationship with the gas output of one back blowing pipe.

[0013] Further, the back blowing assembly further comprises a gas supply pump, which can intermittently supply gas to the auxiliary pipes and the back blowing pipes.

[0014] Further, the plurality of plastic burning plates can be divided into two groups, the two groups of plastic burning plates are spaced apart in the first chamber in the vertical direction, the plurality of plastic burning plates in each group are arranged in the horizontal direction, the adjacent two plastic burning plates in each group have the same overlapping area in the vertical direction, and the upper end surfaces of the plurality of plastic burning plates in each group are slightly stepped; the flue gas preliminarily treated by the pretreatment module is transported to the first chamber through the side of the first chamber.

[0015] Further, the air extraction assembly comprises an air extraction pump for extracting the gas in the second chamber.

[0016] Further, the pretreatment module is a cyclone separator, and the cyclone separator has an air inlet pipe and an air outlet pipe, the air inlet pipe is communicated with the combustion furnace, and the air outlet pipe is communicated with the first chamber.

[0017] The beneficial effects of the present application are: the smoke purification system for hazardous waste incineration treatment of the present application comprises a pretreatment module and a purification module, when the hazardous waste is incinerated, the hazardous waste combustion will produce toxic flue gas, the pretreatment module pretreats the flue gas, and the pretreated flue gas is transported to the first chamber of the treatment box, the plurality of plastic burning plates are arranged in the first chamber, and the communication port arranged on the plastic burning plate is communicated with the second chamber, when the air extraction assembly extracts the air in the second chamber, the flue gas entering the first chamber passes through the side wall of the plastic burning plate to enter the air guide cavity, the gas entering the air guide cavity enters the second chamber through the communication port, and the particulate matters in the flue gas are intercepted on the outside of the plastic burning plate, after a period of operation, the back blowing assembly supplies air to the air guide cavity, so that the particulate matters attached to the outside of the plastic burning plate are separated from the plastic burning plate, when the back blowing assembly operates, the amount of particulate matters attached to different positions of the plastic burning plate is different, then the degree of blockage of different positions of the plastic burning plate is different, at this time, the back blowing assembly can adjust the air pressure of each communication port supplied to the air guide cavity according to the blockage condition of the plastic burning plate, so as to avoid the condition that the back blowing force of the plastic burning plate is too large or too small, and then ensure that the plastic burning plate maintains good filtering performance, thereby improving the purification efficiency of the flue gas. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 A structure schematic view of a smoke purification system for hazardous waste incineration treatment provided by the present application is provided.

[0020] Figure 2A structure diagram of a purification module in a smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided.

[0021] Figure 3 A side view of the purification module in the smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided.

[0022] Figure 4 A structure diagram of the purification module in the smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided.

[0023] Figure 5 A structure diagram of the plastic burning plate in the smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided.

[0024] Figure 6 A structure diagram of the air supply pipe in the smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided.

[0025] Figure 7 A structure diagram of the air supply pipe in the smoke purification system for hazardous waste incineration treatment provided by the embodiment of the present application is provided. Figure 4 A local enlarged view of A in the middle.

[0026] In the figure: 110, treatment box; 120, plastic burning plate; 130, split sleeve; 210, back flushing pipe; 211, air outlet; 220, guide rail; 310, induction plate; 320, connecting rod; 330, control valve; 340, extrusion rod; 350, auxiliary pipe; 360, auxiliary valve; 410, auxiliary rod; 420, linkage rod; 430, sliding sleeve; 440, lead screw; 450, energy dissipation plate; 510, air pump; 520, cyclone separator. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0028] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] As shown in Figures 1 to 7 The smoke purification system for hazardous waste incineration provided by the embodiment of the present application includes a pretreatment module and a purification module.

[0031] When hazardous waste is incinerated, the combustion of hazardous waste will produce toxic flue gas, and the pretreatment module is used to preliminarily treat the flue gas, so that part of the particulate matter in the flue gas can be preliminarily filtered. For example, the pretreatment module is a bag filter, and the bag filter is arranged in a closed chamber. The flue gas after the bag filter can be collected, and the reprocessing program of the flue gas is facilitated.

[0032] The purification module comprises a treatment box 110, a plastic-burning plate 120, a back-flushing assembly and an air extraction assembly. The treatment box 110 is hollow inside, and has a partition sleeve 130. Specifically, the partition sleeve 130 is annular, and is coaxially arranged with the treatment box 110. The lower end of the partition sleeve 130 is fixedly connected with the lower end surface of the treatment box 110, and the upper end of the partition sleeve 130 is fixedly connected with the upper end surface of the treatment box 110. The partition sleeve 130 can divide the inside of the treatment box 110 into a first chamber and a second chamber which are relatively isolated. The first chamber is the space inside the partition sleeve 130, and the second chamber is an annular chamber surrounded by the outer side wall of the partition sleeve 130 and the inner side wall of the treatment box 110. The plastic-burning plate 120 is provided in plurality, and is fixedly arranged in the first chamber. The plurality of plastic-burning plates 120 are arranged in the first chamber in a first preset manner. The inside of each plastic-burning plate 120 is hollow, and the hollow chamber inside the plastic-burning plate 120 is a gas guide chamber. The plurality of plastic-burning plates 120 are fixedly connected with the partition sleeve 130. The plastic-burning plate 120 is provided with a communication port which communicates the gas guide chamber and the second chamber. The communication port is provided in two, and is arranged on the opposite end surfaces of the plastic-burning plate 120. The flue gas treated by the pretreatment module is delivered to the first chamber, and the air extraction assembly is used to extract the gas in the second chamber. When the flue gas is delivered to the first chamber by the pretreatment module, the air extraction assembly starts to extract the gas in the second chamber. The flue gas entering the first chamber can pass through the side wall of the plastic-burning plate 120 and enter the gas guide chamber. The gas entering the gas guide chamber can enter the second chamber through the communication port, and then be extracted from the second chamber by the air extraction assembly. The back-flushing assembly supplies gas to the gas guide chamber through the two communication ports. The back-flushing assembly can adjust the gas pressure supplied by each communication port to the gas guide chamber according to the blockage condition of the plastic-burning plate 120. Specifically, as the flue gas is treated, the particulate matters in the flue gas are intercepted by the side wall of the plastic-burning plate 120, and then adhere to the side wall of the plastic-burning plate 120. After a period of treatment of the flue gas, the particulate matters in the flue gas block the tiny gas-permeable holes on the side wall of the plastic-burning plate 120. At this time, the back-flushing assembly supplies gas to the gas guide chamber through the two communication ports simultaneously, so as to clean the tiny gas-permeable holes on the side wall of the plastic-burning plate 120. In order to ensure that the impurities adhering to the side wall of the plastic-burning plate 120 can be completely cleaned, the back-flushing assembly does not damage the primary dust layer on the surface of the plastic-burning plate 120. The back-flushing assembly adjusts the gas pressure supplied by each communication port to the gas guide chamber according to the blockage condition of the plastic-burning plate 120.

[0033] The application discloses a smoke purification system for hazardous waste incineration treatment. When hazardous waste is incinerated, toxic smoke is generated. The pre-treatment module pre-treats the smoke. The pre-treated smoke is transported to the first chamber of the treatment box 110. The plurality of plastic burning plates 120 are arranged in the first chamber, and the communication ports arranged on the plastic burning plates 120 are in communication with the second chamber. When the air extraction assembly extracts air from the second chamber, the smoke entering the first chamber passes through the side wall of the plastic burning plate 120 and enters the air guide cavity. The gas entering the air guide cavity passes through the communication ports and enters the second chamber. The particulate matters in the smoke are intercepted on the outside of the plastic burning plate 120. After a period of operation, the back blowing assembly supplies air to the air guide cavity, so that the particulate matters attached to the outside of the plastic burning plate 120 are separated from the plastic burning plate 120. When the back blowing assembly operates, the amount of particulate matters attached to different positions of the plastic burning plate 120 is different, and the degree of blockage of different positions of the plastic burning plate 120 is different. At this time, the back blowing assembly can adjust the air pressure supplied by each communication port to the air guide cavity according to the blockage condition of the plastic burning plate 120, so as to avoid the condition that the back blowing force of the plastic burning plate 120 is too large or too small, and thus the filtering performance of the plastic burning plate 120 is ensured to be good, thereby improving the purification efficiency of the smoke.

[0034] In one embodiment, the back blowing assembly includes two back blowing pipes 210 and two guide rails 220. The guide rails 220 are fixedly arranged in the second chamber, and each back blowing pipe 210 is slidingly arranged along one guide rail 220. Specifically, the extension direction of the back blowing pipe 210 in the second chamber is the same as the extension direction of the communication port. The back blowing pipe 210 is provided with a plurality of air outlets 211, and the plurality of air outlets 211 are uniformly arranged along the extension direction of the back blowing pipe 210. When it is necessary to back blow and clean the plastic burning plate 120, each back blowing pipe 210 moves to one communication port of the plastic burning plate 120 along the guide rail 220, and the plurality of air outlets 211 on the two back blowing pipes 210 simultaneously blow air into the air guide cavity, so that the air in the air guide cavity is discharged through the plurality of tiny air permeable holes on the side wall of the plastic burning plate 120, thereby back blowing and cleaning the impurities on the side wall of the plastic burning plate 120. Further, after one of the plastic burning plates 120 is cleaned, the two back blowing pipes 210 simultaneously move to the position of the communication port of the next plastic burning plate 120 along the guide rail 220, and the impurities attached to the side wall of the next plastic burning plate 120 are cleaned.

[0035] In one of the embodiments, the back flushing assembly further comprises a plurality of sensing plates 310, each of which is arranged corresponding to one of the communication ports, and two of the sensing plates 310 at two communication ports of the same plastic burning plate 120 are fixedly connected by a connecting rod 320, which is slidably connected to the inner side wall of the treatment box 110. Specifically, after the flue gas passes through the side wall of the plastic burning plate 120 into the gas guiding cavity, the particulate matters in the flue gas are intercepted outside the plastic burning plate 120, and the gas entering the gas guiding cavity passes through the two communication ports into the second chamber. According to the flue gas entering the gas guiding cavity from different positions of the plastic burning plate 120, the gas entering the gas guiding cavity is discharged into the second chamber from the nearest communication port. If the different positions of the plastic burning plate 120 have different blockage conditions, the gas discharge speeds at the two communication ports are different, and the gas discharged at each communication port can act on one of the sensing plates 310. In the initial state, each of the sensing plates 310 is arranged corresponding to one of the communication ports, and the distances between each of the sensing plates 310 and the corresponding communication port are the same. If the gas discharge speeds at the two communication ports on the same plastic burning plate 120 are different, the distances between the corresponding sensing plates 310 and the communication ports will change. Accordingly, the closer the distance between the sensing plate 310 and the communication port, the higher the degree of blockage of the side of the plastic burning plate 120 close to the communication port, so as to control the gas pressure of the back flushing pipe 210 back flushing into the gas guiding cavity according to the distance between the sensing plate 310 and the communication port, and prevent the condition that the back flushing force of the plastic burning plate 120 is too large to damage the primary dust layer.

[0036] In one of the embodiments, the back flushing assembly further comprises a control panel and two regulating valves 330, each of which is arranged on one of the back flushing pipes 210, and the regulating valve 330 can affect the conduction degree of the back flushing pipe 210. The control panel can control the conduction degree of the regulating valve 330 according to the distance between the sensing plate 310 and the communication port. Specifically, the regulating valve 330 is an electric control valve, and the control panel comprises a distance detector and a control program. When the back flushing pipe 210 moves to the communication port of the plastic burning plate 120, the distance detector detects the distance between the sensing plate 310 and the communication port. In the initial state, the distances between the sensing plates 310 and the communication ports are the same, and the detection signal of the distance detector can be transmitted to the control program. The control program can control the conduction degree of the regulating valve 330 according to the detection result of the distance detector, so as to control the gas pressure of the back flushing pipe 210 back flushing into the gas guiding cavity.

[0037] In one of the embodiments, the backflushing assembly further comprises two extrusion rods 340 and two regulating valves 330, each regulating valve 330 is arranged on one backflushing pipe 210, the regulating valve 330 can affect the degree of conduction of the backflushing pipe 210, specifically, the regulating valve 330 is a mechanical valve, the regulating valve 330 comprises a fixed valve plate and a rotating valve plate, the fixed valve plate is provided with a first opening, the rotating valve plate is coaxially fixedly connected with the fixed valve plate, the rotating valve plate is provided with a second opening, the fixed valve plate can block the second opening, and the rotating valve plate can block the first opening. Each extrusion rod 340 is arranged on one regulating valve 330, the extrusion rod 340 is fixedly connected with the rotating valve plate, and the extrusion rod 340 is slidably connected with the backflushing pipe 210. When the extrusion rod 340 slides on the backflushing pipe 210, the degree to which the first opening is blocked by the rotating valve plate can be changed, thereby adjusting the degree of conduction of the backflushing pipe 210. When the backflushing pipe 210 moves to the communication port, the extrusion rod 340 can abut against the sensing plate 310, the distance between the sensing plate 310 and the communication port can control the sliding amount of the extrusion rod 340 on the backflushing pipe 210, thereby controlling the air pressure of the backflushing pipe 210 to the air guide cavity.

[0038] In one of the embodiments, the backflushing assembly further comprises two auxiliary pipes 350, each auxiliary pipe 350 is slidably arranged with one guide rail 220, and the auxiliary pipe 350 slides along the guide rail 220 synchronously when the backflushing pipe 210 moves along the guide rail 220. Each auxiliary pipe 350 is used in cooperation with one backflushing pipe 210, the auxiliary pipe 350 is arranged at intervals with the backflushing pipe 210, the length of the auxiliary pipe 350 is the same as that of the backflushing pipe 210, and the auxiliary pipe 350 is provided with a plurality of air permeable holes which are uniformly arranged along the extension direction of the auxiliary pipe 350. Each auxiliary pipe 350 can supply air to the air guide cavity through one communication port. The gap between the auxiliary pipe 350 and the backflushing pipe 210 is equal to the gap between two adjacent plastic-burning plates 120, and when the backflushing pipe 210 supplies air to the air guide cavity inside one of the plastic-burning plates 120, the auxiliary pipe 350 supplies air to the air guide cavity inside the adjacent plastic-burning plate 120, thereby preventing the impurities attached to the side wall of the plastic-burning plate 120 from splashing onto the adjacent plastic-burning plate 120 when the backflushing pipe 210 backflushes the side wall of one of the plastic-burning plates 120.

[0039] The air supply amount of each auxiliary pipe 350 is in a linear relationship with the air supply amount of one backflushing pipe 210, specifically, the auxiliary pipe 350 is provided with an auxiliary valve 360, the auxiliary valve 360 can affect the degree of conduction of the auxiliary pipe 350, the auxiliary valve 360 is adjusted synchronously with the regulating valve 330, and the degree to which the auxiliary valve 360 conducts the auxiliary pipe 350 is the same as the degree to which the regulating valve 330 conducts the backflushing pipe 210. Further, the auxiliary valve 360 and the regulating valve 330 are both electrically controlled valves, and the control board can control the auxiliary valve 360 and the regulating valve 330 simultaneously according to the distance between the sensing plate 310 and the communication port.

[0040] In other embodiments, the auxiliary valve 360 and the regulating valve 330 are both mechanical valves, the auxiliary valve 360 comprises a first valve plate and a second valve plate, the first valve plate and the second valve plate are both provided with auxiliary holes, the first valve plate is fixedly connected with the valve body, the second valve plate is rotationally connected with the first valve plate, the second valve plate is fixedly provided with an auxiliary rod 410, the auxiliary rod 410 slides on the auxiliary pipe 350, and the auxiliary rod 410 is hingedly connected with the linkage rod 420 between the extrusion rod 340, so that when the extrusion rod 340 is extruded by the induction plate 310 to slide along the blowback pipe 210, the auxiliary rod 410 slides on the auxiliary pipe 350 through the transmission of the linkage rod 420, so as to change the conduction degree of the auxiliary valve 360.

[0041] In one of the embodiments, the blowback assembly further comprises a gas supply pump, which can intermittently supply gas into the auxiliary pipe 350 and the blowback pipe 210, specifically, when it is necessary to backflush clean the plurality of sintering plates 120, the gas supply pump is started when the blowback pipe 210 corresponds to the communication port of one sintering plate 120, and the gas supply pump is in a shutdown state when the blowback pipe 210 moves along the guide rail 220.

[0042] In one of the embodiments, the blowback pipe 210 is provided with a sliding sleeve 430, the guide rail 220 is provided with a lead screw 440, the sliding sleeve 430 is slidingly connected to the guide rail 220, and the sliding sleeve 430 is provided with a spiral protrusion inside, the spiral protrusion in the sliding sleeve 430 cooperates with the lead screw 440, the processing box 110 is provided with a driving motor, the driving motor is used to drive the lead screw 440 to rotate, and when the lead screw 440 rotates, the sliding sleeve 430 slides along the guide rail 220, so as to change the sintering plate 120 to be cleaned by the blowback pipe 210.

[0043] In one of the embodiments, the plurality of sintered plates 120 can be divided into two groups, the two groups of sintered plates 120 are spaced apart in the vertical direction in the first chamber, each group of sintered plates 120 has a plurality of sintered plates 120, the plurality of sintered plates 120 in each group are arranged in the horizontal direction, each two adjacent sintered plates 120 in each group have the same overlapping area in the vertical direction, and the upper end surfaces of the plurality of sintered plates 120 in each group are slightly stepped. The flue gas preliminarily treated by the pretreatment module is transported to the first chamber through the side of the first chamber. Specifically, the first chamber is internally provided with an energy dissipation plate 450, the upper end of the energy dissipation plate 450 is fixedly connected to the upper end of the first chamber, and the lower end of the energy dissipation plate 450 is arranged below the lower end of the lower group of sintered plates 120. When the flue gas treated by the pretreatment module is transported to the first chamber, the flue gas can directly impact on the energy dissipation plate 450, and under the guidance of the energy dissipation plate 450, the flue gas first enters the gap between the plurality of sintered plates 120 in the lower group, and when the flue gas reaches between the two groups of sintered plates 120, the flue gas can diffuse between the two groups of sintered plates 120. In the process of flue gas diffusion, the plurality of sintered plates 120 arranged in steps can make the flue gas uniformly enter between each two adjacent sintered plates 120, so as to ensure that the particulate matters attached to each two adjacent sintered plates 120 are substantially the same.

[0044] In one of the embodiments, the air extraction assembly includes an air extraction pump 510 for extracting the gas in the second chamber, the air extraction pump 510 starts to start when the flue gas enters the first chamber, and the air extraction pump 510 extracts the gas in the second chamber.

[0045] In one of the embodiments, the pretreatment module is a cyclone separator 520, the cyclone separator 520 has an air inlet pipe and an air outlet pipe, the air inlet pipe is in communication with the combustion furnace, and the air outlet pipe is in communication with the first chamber. The flue gas discharged from the air outlet pipe of the cyclone separator 520 can directly impact on the energy dissipation plate 450.

[0046] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flue gas purification system for hazardous waste incineration, characterized in that, include: The pretreatment module is used for preliminary treatment of flue gas; The purification module includes a treatment box, sintered plates, a backflushing assembly, and an extraction assembly. The treatment box is hollow and has a partition sleeve that divides the interior into a first chamber and a second chamber, which are relatively isolated. The flue gas treated by the pretreatment module is delivered to the first chamber, and the extraction assembly is used to extract gas from the second chamber. Multiple sintered plates are provided, each with an internal air guiding chamber, and these plates are fixedly installed in the first chamber. Each sintered plate has two connecting ports located on opposite ends of the plate, connecting the air guiding chamber to the second chamber. The backflushing assembly supplies air to the air guiding chamber through the two connecting ports, and can adjust the air pressure supplied to the air guiding chamber through each connecting port according to the blockage status of the sintered plates. The backflush assembly includes two backflush pipes and two guide rails. The guide rails are fixedly installed in the second chamber, and each backflush pipe is slidably installed along one guide rail. Each backflush pipe can supply air to the air chamber through a connecting port. The backflush assembly also includes multiple induction plates, each induction plate being set with a corresponding connection port. The two induction plates at the two connection ports of the same plastic sintering plate are fixedly connected by a connecting rod, which is slidably connected to the inner side wall of the processing box. The gas blown from the connection port to the induction plate can change the distance between the induction plate and the connection port. The backflush assembly also includes two squeeze rods and two control valves, each control valve being mounted on a backflush tube. The control valves can affect the conductivity of the backflush tube; the squeeze rods can change the conductivity of the control valves as they slide on the backflush tubes, and the squeeze rods can abut against the sensing plate. The control valve is a mechanical valve, comprising a fixed valve plate and a rotating valve plate. The fixed valve plate has a first opening, and the rotating valve plate is coaxially and fixedly connected to the fixed valve plate. The rotating valve plate has a second opening, which the fixed valve plate can block, and the rotating valve plate can block the first opening. Each extrusion rod is mounted on a control valve and is fixedly connected to the rotating valve plate. The extrusion rod is slidably connected to the backflush pipe. When the extrusion rod slides on the backflush pipe, the degree to which the first opening is blocked by the rotating valve plate can be changed, thereby adjusting the conductivity of the backflush pipe. When the backflush pipe moves to the connecting port, the extrusion rod can abut against the sensing plate. The distance between the sensing plate and the connecting port can control the amount of sliding of the extrusion rod on the backflush pipe, thereby controlling the backflush air pressure in the air chamber.

2. The flue gas purification system for hazardous waste incineration according to claim 1, characterized in that: The backflush assembly also includes two auxiliary pipes, each of which is slidably mounted on a guide rail. Each auxiliary pipe can supply air into the air chamber through a connecting port. The auxiliary pipes and the backflush pipes are spaced apart, and the air output of each auxiliary pipe is linearly related to the air output of a backflush pipe.

3. The flue gas purification system for hazardous waste incineration according to claim 2, characterized in that: The backflush assembly also includes an air supply pump that can intermittently supply air to the auxiliary pipe and the backflush pipe.

4. The flue gas purification system for hazardous waste incineration according to claim 1, characterized in that: The air extraction assembly includes an air extraction pump, which is used to extract gas from the second chamber.

5. The flue gas purification system for hazardous waste incineration according to claim 1, characterized in that: The pretreatment module is a cyclone separator, which has an inlet pipe and an outlet pipe. The inlet pipe is connected to the combustion furnace, and the outlet pipe is connected to the first chamber.

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