Sintering flue gas dust removal device

Abstract

The utility model provides a sintering flue gas dust removal device, which belongs to the technical field of sintering flue gas treatment and comprises a coarse dust removal device, a fine dust removal device and a flue gas emission device, the coarse dust removal device comprises a dust collection cover arranged above the pelletizing disc, a dust removal conveying pipeline connected with the dust collection cover and a spraying structure arranged in the dust removal conveying pipeline; the fine dust removal device comprises a shell, a folded plate dehydration device and a dehydrated flue gas retreatment device, and the folded plate dehydration device is arranged in the shell and is close to the flue gas slurry inlet end; the top end of the baffle is arranged at the top end of the interior of the shell, and the airflow uniform distribution plate, the water bath assembly and the tube bundle demister are sequentially arranged in a space formed by the baffle and the inner side wall, close to the dust removal flue gas discharging end, of the shell from bottom to top. By utilizing the device, the problems of bag pasting and corrosion when a bag-type dust remover is used for removing dust from sintering flue gas containing water vapor generated in a sintering and pelletizing process in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of sintering flue gas treatment technology, and more specifically, to a sintering flue gas dust removal device. Background Technology

[0002] During the sintering and pelletizing process, a large amount of sintering flue gas containing water vapor is generated during pellet making and pellet conveyor belt transportation. This flue gas will escape into the atmosphere during the production process, polluting the surrounding atmospheric environment, deteriorating the working environment, posing a health hazard to on-site workers, and also polluting the surrounding area.

[0003] If a traditional dry bag filter is used to remove dust from the flue gas generated in the sintering and pelletizing process, the presence of water vapor in the flue gas can easily lead to bag clogging and corrosion.

[0004] Therefore, there is currently a lack of a solution in the existing technology that can effectively handle the sintering flue gas generated in the sintering pelletizing process. Utility Model Content

[0005] In view of the above problems, the purpose of this utility model is to provide a sintering flue gas dust removal device to solve the problems of bag clogging and corrosion in the existing technology, where the sintering flue gas generated in the sintering pelletizing process contains water vapor and the traditional dry bag dust collector is used for flue gas treatment.

[0006] The sintering flue gas dust removal device provided by this utility model is applied in the sintering and pelletizing process, and includes a coarse dust removal device, a fine dust removal device, and a flue gas emission device; wherein...

[0007] The coarse dust removal device includes a dust collection hood set above the pelletizing disc of the sintered pellets, a dust removal conveying pipe connected to the dust collection hood, and a spray structure set inside the dust removal conveying pipe; a pressure sensor is set on the dust removal conveying pipe;

[0008] The fine dust removal device includes a shell, a baffle plate dehydration device, and a dehydrated flue gas retreatment device; wherein...

[0009] A flue gas and slurry inlet is provided on one side of the housing and connected to the dust removal conveying pipe, and a dust removal flue gas outlet is provided at the top of the other end of the housing.

[0010] The folding plate dewatering device is located inside the shell and near the flue gas slurry inlet;

[0011] The dehydrated flue gas retreatment device includes a baffle plate with its top end set at the inner top of the housing, an airflow distribution plate, a water bath assembly, and a tube bundle demister arranged sequentially from bottom to top in the space formed by the baffle plate and the inner side wall of the housing near the dust removal flue gas discharge end;

[0012] The gap between the lower end of the baffle and the inner bottom of the shell, and the gap between the baffle dehydration device and the baffle, form a flue gas baffle channel.

[0013] The flue gas emission device is connected to the dust removal flue gas discharge end.

[0014] In addition, a preferred structure is that a dust collection hood is provided above each pelletizing plate; each dust collection hood is connected to the dust removal conveying pipeline through a flue gas conveying branch pipe.

[0015] Furthermore, a preferred structure is that a coarse treatment port is provided at the lower part of the flue gas and sludge inlet of the shell; a fine treatment port is provided at the bottom middle part of the shell; and a coarse sludge discharge pipeline and a fine sludge discharge pipeline are respectively connected to the coarse treatment port and the fine treatment port.

[0016] Furthermore, a preferred configuration further includes a recycling device; wherein,

[0017] The recirculation device includes a primary sedimentation tank, a sludge tank, a secondary sedimentation tank, and a tertiary sedimentation tank; wherein, the primary sedimentation tank is connected to both the coarse sludge discharge pipeline and the fine sludge discharge pipeline;

[0018] A sewage pump is installed in the primary sedimentation tank, and the sewage pump is connected to the sludge tank through a sewage pipeline.

[0019] A sludge pump is installed in the sludge tank, and a filter press is connected to the sludge outlet of the sludge pump.

[0020] The secondary sedimentation tank is connected to the primary sedimentation tank and the tertiary sedimentation tank, respectively;

[0021] A dust removal pipe spray pump is installed in the three-stage sedimentation tank, and the dust removal pipe spray pump is connected to the spray structure through a spray pipeline.

[0022] Furthermore, a preferred configuration is that a flow meter is installed on the spray line.

[0023] Furthermore, a preferred configuration is that a first agitator is provided in the primary sedimentation tank; and / or a second agitator is provided in the sludge tank.

[0024] Furthermore, a preferred structure is that the flue gas emission device includes a flue gas emission pipe connected to the dust removal flue gas emission end, a flue gas connecting pipe connected to the flue gas emission pipe, and a chimney connected to the flue gas connecting pipe;

[0025] An induced draft fan is installed on the flue gas connection pipe;

[0026] A first purified water outlet is provided at the lower part of the flue gas emission duct, a second purified water outlet is provided at the lower part of the chimney, and a third purified water outlet is provided at the bottom of the induced draft fan.

[0027] The first purified water outlet, the second purified water outlet, and the third purified water outlet are all connected to the three-stage sedimentation tank via purified water pipelines.

[0028] Furthermore, a preferred structure is that the spray structure includes a spray head disposed inside the dust removal conveying pipe and a spray head connecting pipe connected to the spray head;

[0029] The spray head connecting pipe is connected to the spray pipeline;

[0030] A spray head control valve is installed on the spray head connecting pipe;

[0031] The spray head control valve is located outside the dust removal conveying pipeline.

[0032] Furthermore, in a preferred configuration, a folding plate backwashing spray head is provided above the folding plate dewatering device; the folding plate backwashing spray head is connected to the spray pipeline via a spray delivery branch pipe.

[0033] Furthermore, in a preferred configuration, a component backwashing spray head is provided below the water bath assembly; a sprayer backwashing spray head is provided above the tube bundle sprayer; the component backwashing spray head and the sprayer backwashing spray head are respectively connected to a purified water pipeline via a first pipeline and a second pipeline, and a purified water pump is provided on the purified water pipeline.

[0034] As can be seen from the above technical solution, the sintering flue gas dust removal device provided by this utility model collects the flue gas generated during pelletizing through a dust collection hood set above the pelletizing disc of the sintering pellets. The collected flue gas enters the dust removal conveying pipeline and is fully mixed with spray water through its internal spray structure to form slurry, removing large particles in the flue gas and giving the flue gas coarse dust removal treatment. After coarse dust removal, the flue gas enters the fine dust removal device, first undergoing preliminary dehydration through a baffle plate dehydration device to reduce the water content in the flue gas, and then passing through an airflow equalization plate to even out the airflow. The flue gas then passes through a water bath assembly and a tube bundle demister for final fine dust removal, which can remove small particles and water vapor that were not treated by the previous spraying, and finally make the discharged flue gas meet the emission standards and be discharged through the flue gas emission device. The flue gas dust removal effect is good and can effectively solve the problems of bag clogging and corrosion that exist in the existing bag dust collectors when removing flue gas containing water vapor. This invention enables effective control of water vapor-containing dust generated during the pelletizing process, shortens the entire dust removal process, reduces the operating cost of the entire device, greatly improves flue gas treatment efficiency, and reduces the impact on the surrounding environment. Attached Figure Description

[0035] Other objects and results of this invention will become clearer and easier to understand with reference to the following description taken in conjunction with the accompanying drawings, and with a more comprehensive understanding of the invention.

[0036] Figure 1 This is a schematic diagram of the sintering flue gas dust removal device according to an embodiment of the present utility model;

[0037] Figure 2 This is a top view of the sintering flue gas dust removal device according to an embodiment of the present utility model;

[0038] Figure 3 This is a schematic diagram of the structure of the fine dust removal device according to an embodiment of the present utility model.

[0039] In the attached drawings, 11-dust collection hood, 12-dust removal conveying pipe, 13-spraying structure, 131-spray head, 132-spray head connecting pipe, 133-spray head control valve, 14-flue gas conveying branch pipe, 21-shell, 211-flue gas and slurry inlet, 212-dust removal flue gas outlet, 22-baffle plate dewatering device, 221-baffle plate backwashing spray head, 222-spraying conveying branch pipe, 231-baffle plate, 232-airflow distribution plate, 233-water bath assembly, 2331-assembly backwashing spray head, 234-tube bundle demister, 2341-sprayer backwashing. Spray head, 24-Flue gas baffle channel, 25-Coarse sludge discharge pipeline, 26-Fine sludge discharge pipeline, 31-Flue gas emission pipeline, 32-Flue gas connection pipe, 33-Chimney, 34-Exhaust fan, 41-Primary sedimentation tank, 42-Sludge tank, 43-Secondary sedimentation tank, 44-Tertiary sedimentation tank, 45-Sewage pump, 46-Sewage pipeline, 47-Sludge pump, 48-Filter press, 49-Dust removal pipe spray pump, 5-Spray pipeline, 51-Flow meter, 6-First agitator, 7-Second agitator, 8-Purified water pipeline, 91-Purified water pipe, 92-Purified water pump.

[0040] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0041] In response to the aforementioned issue that, in the existing technology, the sintering flue gas generated in the sintering pelletizing process contains water vapor, and the use of traditional dry bag filters for flue gas treatment results in problems such as bag clogging and corrosion, a sintering flue gas dust removal device is proposed.

[0042] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0043] To illustrate the sintering flue gas dust removal device provided by this utility model Figure 1 The principle structure of the sintering flue gas dust removal device according to an embodiment of the present invention is shown; Figure 2 A top view of the sintering flue gas dust removal device according to an embodiment of the present invention is shown; Figure 3 The structure of a fine dust removal device according to an embodiment of the present invention is shown.

[0044] like Figures 1 to 3 As shown in the diagram, the sintering flue gas dust removal device provided by this utility model is applied in the sintering and pelletizing process, and includes a coarse dust removal device, a fine dust removal device, and a flue gas emission device; wherein,

[0045] The coarse dust removal device includes a dust collection hood 11 installed above the pelletizing tray of the sintered pellets, a dust removal conveying pipe 12 connected to the dust collection hood 11, and a spray structure 13 installed inside the dust removal conveying pipe 12; a pressure sensor is installed on the dust removal conveying pipe 12.

[0046] The dust removal device includes a housing 21, a baffle plate dewatering device 22, and a dewatered flue gas retreatment device; wherein,

[0047] A flue gas and slurry inlet 211 connected to the dust removal conveying pipe 12 is provided on one side of the housing 21, and a dust removal flue gas outlet 212 is provided at the top of the other end of the housing 21.

[0048] The baffle plate dewatering device 22 is located inside the housing 21 and close to the flue gas slurry inlet 211;

[0049] The dehydrated flue gas retreatment device includes a baffle 231 with its top end set at the inner top of the housing 21, an airflow distribution plate 232 arranged from bottom to top in the space formed by the baffle 231 and the inner side wall of the housing 21 near the dust removal flue gas discharge end 212, a water bath assembly 233 and a tube bundle demister 234.

[0050] The gap between the lower end of the baffle 231 and the inner bottom of the housing 21, and the gap between the baffle dewatering device 22 and the baffle 231 form a flue gas baffle channel 24; the flue gas emission device is connected to the dust removal flue gas emission end 212.

[0051] The flue gas generated during pelletizing is collected by a dust collection hood 11 located above the pelletizing pan of the sintering pellets. The collected flue gas enters the dust removal conveying pipe 12, where it is thoroughly mixed with spray water by the internal spray structure 13 to form a slurry, removing large particles from the flue gas and providing coarse dust removal treatment. After coarse dust removal, the flue gas enters the fine dust removal device, where it first undergoes preliminary dehydration by a baffle plate dehydration device 22 to reduce the moisture content of the flue gas. Then, the airflow is evenly distributed by an airflow distribution plate 232, and the flue gas then sequentially passes through a water bath assembly 233 and a tube bundle demister 234 for further processing. The final fine dust removal process removes small particles and water vapor that were not treated by the initial spraying, ensuring that the discharged flue gas meets emission standards and is then discharged through a flue gas emission device. This method provides excellent flue gas dust removal and effectively solves the problems of bag clogging and corrosion that exist in existing bag filters when removing flue gas containing water vapor. This invention can effectively control the water vapor-containing dust generated in the pelletizing process, shorten the entire dust removal process, reduce the operating cost of the entire device, greatly improve flue gas treatment efficiency, and reduce the impact on the surrounding environment.

[0052] As a preferred embodiment of this utility model, a dust collection hood 11 is provided above each pelletizing plate; each dust collection hood 11 is connected to the dust removal conveying pipe 12 through a flue gas conveying branch pipe 14.

[0053] Specifically, each pelletizing tray in the pelletizing chamber is equipped with a dust collection hood 11 to better collect the sintering flue gas generated by each pelletizing tray. Alternatively, a large dust collection hood can be uniformly installed above multiple pelletizing trays; this invention does not impose any particular limitation on this method. When each pelletizing tray is equipped with a corresponding dust collection hood 11, each dust collection hood 11 is connected to a dust removal conveying pipe 12 via a flue gas conveying branch pipe 14. The flue gas conveying branch pipe 14 and the dust removal conveying pipe 12 can be connected by insertion. For example, multiple insertion holes are provided on the dust removal conveying pipe 12, and the end of the flue gas conveying branch pipe 14 is inserted into the insertion holes. To better collect the sintering flue gas, the unloading point of the pellet conveying belt can be sealed, allowing the flue gas collected by each dust collection hood 11 to flow into the dust removal conveying pipe 12 through the aforementioned insertion method.

[0054] As a preferred embodiment of this utility model, a coarse treatment port is provided at the lower part of the flue gas and sludge inlet 211 of the shell 21; a fine treatment port is provided at the bottom middle part of the shell 21; and a coarse sludge discharge pipeline 25 and a fine sludge discharge pipeline 26 are respectively connected to the coarse treatment port and the fine treatment port.

[0055] Specifically, the coarse sludge that has undergone coarse treatment by the spray structure 13 inside the dust removal conveying pipe 12 and the fine sludge that has undergone fine treatment by dewatering, water bath and demisting inside the shell 21 through the coarse sludge discharge pipe 25 and the fine sludge discharge pipe 26 are respectively discharged from the shell 21 through the coarse sludge discharge pipe 25 and the fine sludge discharge pipe 26.

[0056] As a preferred embodiment of this utility model, it also includes a recirculation device; wherein the recirculation device includes a primary sedimentation tank 41, a sludge tank 42, a secondary sedimentation tank 43, and a tertiary sedimentation tank 44; wherein the primary sedimentation tank 41 is connected to both the coarse sludge discharge pipeline 25 and the fine sludge discharge pipeline 26; a sewage pump 45 is installed in the primary sedimentation tank 41, and the sewage pump 45 is connected to the sludge tank 42 through a sewage discharge pipeline 46; a sludge pump 47 is installed in the sludge tank 42, and the sludge outlet of the sludge pump 47 is connected to a filter press 48; the secondary sedimentation tank 43 is connected to both the primary sedimentation tank 41 and the tertiary sedimentation tank 44; a dust removal pipe spray pump 49 is installed in the tertiary sedimentation tank 44, and the dust removal pipe spray pump 49 is connected to the spray structure 13 through a spray pipeline 5.

[0057] Specifically, by constructing a recycling device nearby, the sludge generated by the spraying is treated by sedimentation in a three-stage sedimentation tank. The upper clear water can be directly used as circulating water. Water is supplied to the spraying structure 13 through the dust removal pipe spray pump 49 and spray pipeline 5, so that the spraying water can be recycled. The sludge in the sedimentation tank is pumped into the sludge tank 42 through the sewage pump 45 and sewage pipeline 46. In the sludge tank 42, the sludge is filtered by the sludge pump 47 and filter press 48. The water pressed out can be discharged back into the primary sedimentation tank 41. The main component of the sludge after filtration is the dust generated during pelleting, most of which is pelleting raw material. After drying, it can be recycled.

[0058] As a preferred embodiment of this utility model, a flow meter 51 is provided on the spray pipeline 5.

[0059] Specifically, the flow meter 51 facilitates the measurement of the water supply flow rate on the spray pipeline 5, and makes it easy to adjust the water supply according to the flow rate.

[0060] As a preferred embodiment of this utility model, a first agitator 6 is provided in the primary sedimentation tank 41; and / or, a second agitator 7 is provided in the sludge tank 42.

[0061] Specifically, the agitator facilitates the mixing of sedimentation tanks and sludge tanks.

[0062] As a preferred embodiment of this utility model, the flue gas emission device includes a flue gas emission pipe 31 connected to the dust removal flue gas discharge end 212, a flue gas connecting pipe 32 connected to the flue gas emission pipe 31, and a chimney 33 connected to the flue gas connecting pipe 32; an induced draft fan 34 is provided on the flue gas connecting pipe 33; a first purified water outlet is provided at the lower part of the flue gas emission pipe 31, a second purified water outlet is provided at the lower part of the chimney 33; a third purified water outlet is provided at the bottom of the induced draft fan 34; the first purified water outlet, the second purified water outlet, and the third purified water outlet are all connected to the three-stage sedimentation tank 44 through a purified water pipeline 8.

[0063] Specifically, the water generated during the emission of flue gas in the flue gas emission device is purified water, which can be directly discharged into the three-stage sedimentation tank 44 for spray water supply.

[0064] As a preferred embodiment of the present invention, the spray structure 13 includes a spray head 131 disposed inside the dust removal conveying pipe 12 and a spray head connecting pipe 132 connected to the spray head 131; the spray head connecting pipe 132 is connected to the spray pipeline 5; a spray head control valve 133 is disposed on the spray head connecting pipe 132; the spray head control valve 133 is disposed outside the dust removal conveying pipe 12.

[0065] Specifically, a spray head control valve 133 is installed outside the dust removal conveying pipeline 12 to facilitate the control of the spray operation.

[0066] As a preferred embodiment of this utility model, a folding plate backwashing spray head 221 is provided above the folding plate dewatering device 22; the folding plate backwashing spray head 221 is connected to the spray pipeline 5 through the spray conveying branch pipe 222.

[0067] Specifically, the supernatant water produced in the three-stage sedimentation tank 44 of the recirculation unit can also be used for the backwashing process of the baffle plate dewatering device 22, the water bath assembly 233, and the tube bundle demister 234, further conserving water. Most of the water can enter the sedimentation tank for settling and recycling. The water lost during dust removal is mainly due to natural evaporation from the sludge sedimentation tank and evaporation during sludge drying after filter pressing. The treated flue gas meets national ultra-low emission standards and is discharged into the atmosphere through an exhaust stack after passing through a fan and silencer.

[0068] As a preferred embodiment of this utility model, a component backwashing spray head 2331 is provided below the water bath component 233; a sprayer backwashing spray head 2341 is provided above the tube bundle sprayer 234; the component backwashing spray head 2331 and the sprayer backwashing spray head 2341 are respectively connected to the purified water pipe 91 through the first pipeline and the second pipeline, and a purified water pump 92 is provided on the purified water pipe 91.

[0069] It should be noted that the component backwash spray head 2331 and the sprayer backwash spray head 2341 can be supplied with water from the purified water pipe 91 or from the three-stage sedimentation tank 44 of the recirculation device. This utility model does not make any special limitation in this regard.

[0070] As can be seen from the above specific embodiments, the sintering flue gas dust removal device provided by this utility model collects the flue gas generated during pelletizing through a dust collection hood set above the pelletizing pan of the sintering pellets. The collected flue gas enters the dust removal conveying pipeline, where the flue gas and spray water are fully mixed through the internal spray structure to form a slurry, removing large particles from the flue gas and thus performing coarse dust removal treatment. The flue gas after coarse dust removal enters the fine dust removal device, where it first undergoes preliminary dehydration through a baffle plate dehydration device to reduce the moisture content of the flue gas. Then, the airflow is evenly distributed through an airflow distribution plate, and the flue gas then sequentially passes through a water bath assembly and... The tube bundle demister performs final fine dust removal, removing small particles and water vapor that were not treated by the previous spraying, ultimately ensuring that the discharged flue gas meets emission standards and is discharged through the flue gas emission device. This method offers excellent flue gas dust removal and effectively solves the problems of bag clogging and corrosion that exist in existing bag filters when removing water vapor-containing flue gas. This invention effectively controls the water vapor-containing dust generated during the pelletizing process, shortens the entire dust removal process, reduces the operating cost of the entire device, greatly improves flue gas treatment efficiency, and reduces the impact on the surrounding environment.

[0071] The sintering flue gas dust removal device according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the sintering flue gas dust removal device proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A sintering flue gas dust removal device, applied in the sintering and pelletizing process, characterized in that, It includes a coarse dust removal device, a fine dust removal device, and a flue gas emission device; among which, The coarse dust removal device includes a dust collection hood set above the pelletizing disc of the sintered pellets, a dust removal conveying pipe connected to the dust collection hood, and a spray structure set inside the dust removal conveying pipe; a pressure sensor is set on the dust removal conveying pipe; The fine dust removal device includes a shell, a baffle plate dehydration device, and a dehydrated flue gas retreatment device; wherein... A flue gas and slurry inlet is provided on one side of the housing and connected to the dust removal conveying pipe, and a dust removal flue gas outlet is provided at the top of the other end of the housing. The folding plate dewatering device is located inside the shell and near the flue gas slurry inlet end; The dehydrated flue gas retreatment device includes a baffle plate with its top end set at the inner top of the housing, an airflow distribution plate, a water bath assembly, and a tube bundle demister arranged sequentially from bottom to top in the space formed by the baffle plate and the inner side wall of the housing near the dust removal flue gas discharge end; The gap between the lower end of the baffle and the inner bottom of the shell, and the gap between the baffle dehydration device and the baffle, form a flue gas baffle channel. The flue gas emission device is connected to the dust removal flue gas discharge end.

2. The sintering flue gas dust removal device according to claim 1, characterized in that, Each pelletizing tray is equipped with a dust collection hood above it; Each dust collection hood is connected to the dust removal conveying pipeline via a flue gas conveying branch pipe.

3. The sintering flue gas dust removal device according to claim 1, characterized in that, A coarse treatment port is provided at the lower part of the flue gas and slurry inlet of the shell. A fine-processing port is provided at the bottom middle part of the housing; The coarse treatment port and the fine treatment port are respectively connected to a coarse sludge discharge pipeline and a fine sludge discharge pipeline.

4. The sintering flue gas dust removal device according to claim 3, characterized in that, It also includes a recirculation device; wherein, The recirculation device includes a primary sedimentation tank, a sludge tank, a secondary sedimentation tank, and a tertiary sedimentation tank; wherein, the primary sedimentation tank is connected to both the coarse sludge discharge pipeline and the fine sludge discharge pipeline; A sewage pump is installed in the primary sedimentation tank, and the sewage pump is connected to the sludge tank through a sewage pipeline. A sludge pump is installed in the sludge tank, and a filter press is connected to the sludge outlet of the sludge pump. The secondary sedimentation tank is connected to the primary sedimentation tank and the tertiary sedimentation tank, respectively; A dust removal pipe spray pump is installed in the three-stage sedimentation tank, and the dust removal pipe spray pump is connected to the spray structure through a spray pipeline.

5. The sintering flue gas dust removal device according to claim 4, characterized in that, A flow meter is installed on the spray pipeline.

6. The sintering flue gas dust removal device according to claim 4, characterized in that, A first agitator is provided in the primary sedimentation tank; and / or, A second agitator is installed inside the sludge tank.

7. The sintering flue gas dust removal device according to claim 4, characterized in that, The flue gas emission device includes a flue gas emission pipe connected to the dust removal flue gas discharge end, a flue gas connecting pipe connected to the flue gas emission pipe, and a chimney connected to the flue gas connecting pipe; An induced draft fan is installed on the flue gas connection pipe; A first purified water outlet is provided at the lower part of the flue gas emission duct, a second purified water outlet is provided at the lower part of the chimney, and a third purified water outlet is provided at the bottom of the induced draft fan. The first purified water outlet, the second purified water outlet, and the third purified water outlet are all connected to the three-stage sedimentation tank via purified water pipelines.

8. The sintering flue gas dust removal device according to claim 4, characterized in that, The spray structure includes a spray head disposed inside the dust removal conveying pipe and a spray head connecting pipe connected to the spray head; The spray head connecting pipe is connected to the spray pipeline; A spray head control valve is installed on the spray head connecting pipe; The spray head control valve is located outside the dust removal conveying pipeline.

9. The sintering flue gas dust removal device according to claim 8, characterized in that, A folding plate backwash spray head is provided above the folding plate dewatering device; The folding plate backwash spray head is connected to the spray pipeline via a spray delivery branch pipe.

10. The sintering flue gas dust removal device according to claim 1, characterized in that, A backwash spray head is provided below the water bath assembly; A sprayer backwash nozzle is provided above the tube bundle demister; The component backwash spray head and the sprayer backwash spray head are respectively connected to the purified water pipeline through the first pipeline and the second pipeline, and a purified water pump is installed on the purified water pipeline.

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