Dust-containing gas purification wet dust collector

Abstract

The utility model discloses a dust-containing gas purification wet dust collector which comprises a dust collection box, a demisting chamber and a water distribution mechanism, a water body is stored in the dust collection box, a gas inlet pipe and a blow-off pipe are arranged on one side of the dust collection box, the dust collection box is communicated with an outlet of a double-shaft stirrer through the gas inlet pipe, and the other end of the blow-off pipe is communicated with a waste water pit. The water distribution mechanism is communicated with one side, close to the air inlet pipe, of the dust removal box and is communicated with the blow-off pipe; the demisting chamber is communicated with one side, far away from the water distribution mechanism, of the dust removal box through a pipeline. The utility model belongs to the technical field of the thermal power industry, and particularly relates to a device which is used for purifying solid particles in dusty gas, carrying out dust falling treatment on the dusty gas for multiple times, effectively removing particles in flue gas, reducing the content of particulate pollutants in flue gas at the tail of thermal power, meeting the national requirement for emission of the particulate pollutants of the thermal power and reducing the environmental pollution. And the wet dust collector for purifying the dusty gas can also protect the health of a thermal power plant and surrounding personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power industry, and particularly relates to a wet dust collector for purifying dust-containing gas. Background Art

[0002] During the operation of traditional thermal power plants, a large amount of dust is inevitably generated. Whether from the perspective of environmental protection or the protection of the physical health of staff, flue gas dust removal is a very important task for the thermal power industry.

[0003] For every 100 μg / m increase in particulate pollutants in the air 3 , the mortality rate of the human body due to respiratory system diseases will increase by 8.32%, the mortality rate due to coronary heart disease will increase by 8.92%, and the mortality rate due to chronic obstructive pulmonary disease will increase by 7.25%. Thus, it can be seen the huge threat of particulate pollutants to humans. And according to the emission requirements for solid particulate pollutants in the GB 31571-2015 "Emission Standards for Pollutants from the Petroleum Chemical Industry" promulgated by the state.

[0004] To achieve an ideal dust removal effect, in view of this problem, a wet dust collector for purifying dust-containing gas is proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to effectively remove particulate matter in the flue gas and reduce the content of particulate pollutants in the flue gas at the tail of thermal power, which can not only meet the national requirements for the emission of thermal power particulate pollutants, but also protect the physical health of thermal power plants and surrounding personnel.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is as follows: A wet dust collector for purifying dust-containing gas, including a dust removal box, which stores water inside. An air inlet pipe and a sewage discharge pipe are opened on one side of the dust removal box. The dust removal box is connected to the outlet of a double-shaft mixer through the air inlet pipe. The other end of the sewage discharge pipe is connected to a waste water pit. It also includes a demisting chamber and a water distribution mechanism. The water distribution mechanism is connected to one side of the dust removal box close to the air inlet pipe and is connected to the sewage discharge pipe, and is used to adjust the balance of the inflow and outflow of water in the dust removal box. The demisting chamber is connected to the dust removal box through a pipeline on the side far from the water distribution mechanism, and is used for secondary dust removal and discharge of gas.

[0007] Further, the dust removal box further includes an air inlet spraying mechanism and a cyclone generator. The air inlet spraying mechanism is arranged in the upper part of the air inlet pipe, and the cyclone generator is arranged in the upper part of the dust removal box for centrifuging dust gas and contacting with water.

[0008] Further, the air inlet spraying mechanism includes spraying nozzles, and the spraying nozzles are fixedly connected to the upper inner wall of the air inlet pipe for primary spraying and dust removal of the dust-containing gas.

[0009] Furthermore, a sewage discharge mechanism is provided at the bottom of the dust removal box. The sewage discharge mechanism is located at the lower part of the dust removal box and is used for detecting and emptying the sludge inside the dust removal box. The sewage discharge mechanism includes a maintenance and emptying pipe, which is connected to the bottom of the dust removal box, and a manual isolation valve is arranged in the middle section of the maintenance and emptying pipe.

[0010] Furthermore, one end of the sewage discharge pipe far away from the wastewater pit is connected with a sewage pump. The sewage pump is located inside the dust removal box. The sewage discharge pipe is communicated with the water outlet end of the sewage pump, and the sewage pump is connected with the spray nozzle through a pipeline.

[0011] Furthermore, the water distribution mechanism includes a water inlet component and a double-shaft stirring and spraying component. The water inlet component is communicated with one side of the dust removal box, and the double-shaft stirring and spraying component is communicated with the side wall of the sewage discharge pipe. At least one group of double-shaft stirring and spraying components is provided.

[0012] Furthermore, the water inlet component includes a water inlet pipe and a connecting pipe. The water inlet pipe is communicated with one side of the dust removal box, and the connecting pipe is communicated between the sewage pipe and the water inlet pipe, so that the sewage pipe and the water inlet pipe are connected in parallel.

[0013] A manual ball valve is arranged at the water inlet end of the water inlet pipe, and an electric water inlet regulating valve is arranged in the middle section of the water inlet pipe. The electric water inlet regulating valve is located between the connecting pipe and the dust removal box.

[0014] A pneumatic ball valve I is connected to the middle section of the connecting pipe, and a pneumatic ball valve II is connected to the middle section of the sewage discharge pipe. The pneumatic ball valve I is located on one side of the output end of the pneumatic ball valve II.

[0015] Furthermore, the double-shaft stirring and spraying component includes a spray pipe and a spray head. The spray pipe is communicated with the side wall of the sewage discharge pipe. The spray pipe is arranged in parallel with the sewage discharge pipe. The spray head is connected to the water outlet end of the spray pipe and is used for spraying and dust reduction of the double-shaft mixer. A pneumatic ball valve III is arranged in the middle section of the spray pipe.

[0016] Furthermore, the demisting chamber further includes a centrifugal fan and a fan motor. The centrifugal fan is arranged inside the demisting chamber. The fan motor is connected with the centrifugal fan by a belt. The centrifugal fan is driven by the fan motor to rotate inside the demisting chamber for secondary centrifugal separation of the dust-containing gas.

[0017] Furthermore, a submersible agitator is arranged inside the dust removal box, and a water level sensor is arranged on the upper inner wall of the dust removal box. The water level sensor is electrically connected to the PLC control system and is used for regulating the water inlet inside the dust removal box.

[0018] After adopting the above structure, the beneficial effects of the utility model are as follows: aiming at the purification of solid particles in the dust-containing gas, the dust-containing gas is subjected to multiple dust reduction treatments;

[0019] (1) The dusty gas enters the dust removal box through the intake pipe. The intake spray mechanism sprays the dusty gas in the intake pipe for primary dust removal by spraying, and the cyclone generator centrifugally processes the dusty gas inside the dust removal box, forcing the dusty gas to pass through the water body inside the dust removal box to capture solid particles.

[0020] (2) The dusty gas that has passed through the water body enters the demisting chamber for secondary centrifugal dust removal treatment. After secondary dust removal of the preliminarily dust-removed dusty gas and capturing water vapor and a small amount of solid particles in the gas, it is discharged.

[0021] (3) The sludge mixed with dust and water is collected inside the dust removal box. The submersible agitator stirs the water body to prevent the sludge from depositing inside the dust removal box. The sewage pump discharges the muddy water through the sewage discharge pipe for treatment. At the same time, the muddy water inside the dust removal box can be recycled and introduced into the intake spray mechanism and the double-shaft stirring spray assembly respectively for dust removal treatment, and the inside of the dust removal box is detected and emptied through the sewage discharge mechanism.

[0022] (4) The water distribution mechanism adjusts the balance of the inflow and outflow of water inside the dust removal box. When the recycled muddy water is continuously discharged, the water level sensor detects the water level inside the dust removal box, and the water inlet assembly continuously replenishes clean water into the dust removal box. Description of the Drawings

[0023] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model.

[0024] Figure 1 It is a schematic diagram of the overall structure of a wet dust collector for purifying dusty gas proposed by the present utility model.

[0025] In the drawings: 1. Dust removal box, 2. Intake pipe, 3. Sewage discharge pipe, 4. Demisting chamber, 5. Water distribution mechanism, 6. Intake spray mechanism, 7. Cyclone generator, 8. Spray nozzle, 9. Sewage discharge mechanism, 10. Maintenance and evacuation pipe, 11. Manual isolation valve, 12. Sewage pump, 13. Water inlet assembly, 14. Double-shaft stirring spray assembly, 15. Intake pipe, 16. Connecting pipe, 17. Manual ball valve, 18. Pneumatic ball valve II, 19. Spray pipe, 20. Spray head, 21. Pneumatic ball valve III, 22. Centrifugal fan, 23. Fan motor, 24. Submersible agitator, 25. Water level sensor, 26. Electric water inlet regulating valve, 27. Pneumatic ball valve I. Detailed Embodiments

[0026] As Figure 1As shown in the figure, a wet dust collector for purifying dust-containing gas includes a dust removal box 1, which stores water inside. An air inlet pipe 2 and a sewage discharge pipe 3 are provided on one side of the dust removal box 1. The dust removal box 1 is connected to the outlet of a double-shaft mixer through the air inlet pipe 2, and the other end of the sewage discharge pipe 3 is connected to a waste water pit. It also includes a demisting chamber 4 and a water distribution mechanism 5. The water distribution mechanism 5 is connected to the side of the dust removal box 1 close to the air inlet pipe 2 and is connected to the sewage discharge pipe 3, and is used to adjust the balance of the inflow and outflow of water in the dust removal box 1. The demisting chamber 4 is connected to the side of the dust removal box 1 far from the water distribution mechanism 5 through a pipeline, and is used for secondary dust removal and discharge of gas. The air inlet pipe 2 absorbs the dust-containing gas at the outlet of the double-shaft mixer, contacts with the water body inside the dust removal box 1 for primary dust removal, and the dust-containing gas after primary dust removal is introduced into the demisting chamber 4 for secondary dust removal. After capturing the water vapor and a small amount of solid particles in the gas, it is discharged. The sludge generated inside the dust removal box 1 is discharged through the sewage discharge pipe 3. At the same time, the water distribution mechanism 5 maintains the balance of the water inflow and outflow in the dust removal box 1 and adjusts it to an equilibrium state.

[0027] In order to achieve the primary dust removal treatment of the dust-containing gas inside the dust removal box 1, the dust removal box 1 further includes an intake spray mechanism 6 and a cyclone generator 7. The intake spray mechanism 6 is arranged in the upper part of the air inlet pipe 2, and the cyclone generator 7 is arranged in the upper part of the dust removal box 1 and is used for centrifuging the dust-laden gas and contacting with the water body. The intake spray mechanism 6 includes spray nozzles 8, and the spray nozzles 8 are fixedly connected to the upper inner wall of the air inlet pipe 2 and are used for the primary spray dust removal of the dust-containing gas. When the dust-containing gas passes through the air inlet pipe 2, it is preliminarily sprayed and dust-removed through the intake spray mechanism 6. At the same time, inside the dust removal box 1, through the cyclone generator 7, the dust-containing gas entering the dust removal box 1 is centrifuged and forced to contact with the water body, and the solid particles in the flue gas are captured by the water body and mixed with the water body to produce muddy water.

[0028] In order to meet the gas emission standards, the secondary dust removal treatment is carried out on the dust-containing gas after primary dust removal. The demisting chamber 4 further includes a centrifugal fan 22 and a fan motor 23. The centrifugal fan 22 is arranged inside the demisting chamber 4, and the fan motor 23 is belt-connected to the centrifugal fan 22. The fan motor 23 drives the centrifugal fan 22 to rotate inside the demisting chamber 4 for the secondary centrifugal separation of the dust-laden gas. The gas after secondary separation is discharged into the atmosphere.

[0029] In order to discharge the sewage inside the dust removal box 1, a sewage pump 12 is connected to the end of the sewage discharge pipe 3 far from the waste water pit. The sewage pump 12 is located inside the dust removal box 1, and the sewage discharge pipe 3 is connected to the water outlet end of the sewage pump 12. The muddy water inside the dust removal box 1 is discharged into the waste water pit through the sewage pump 12. A submersible agitator 24 is arranged inside the dust removal box 1 to stir the muddy water inside the dust removal box 1 to avoid sludge deposition.

[0030] Moreover, during the process of discharging muddy water from the dust removal tank 1, in order to regulate the water balance inside the dust removal tank 1, maintain the water level inside the dust removal tank 1, and continuously utilize the water body to capture solid particles in the dust-containing gas, the water distribution mechanism 5 includes a water inlet assembly 13 and a double-shaft stirring and spraying assembly 14. The water inlet assembly 13 is connected to one side of the dust removal tank 1, and the double-shaft stirring and spraying assembly 14 is connected to the side wall of the sewage discharge pipe 3. At least one group of double-shaft stirring and spraying assemblies 14 is provided. The dust removal tank 1 discharges sludge through the sewage discharge pipe 3. At the same time, the double-shaft stirring and spraying assembly 14 is connected to the sewage discharge pipe 3. When the sewage discharge pipe 3 continuously discharges muddy water, the water body inside the dust removal tank 1 decreases, and clean water is supplemented into the dust removal tank 1 through the water inlet assembly 13.

[0031] In order to recycle the muddy water inside the dust removal tank 1, the sewage pump 12 is connected to the spray nozzle 8 through a pipeline. At the same time, the sewage pump 12 pumps the muddy water into the spray nozzle 8 through the pipeline, and a filter screen is arranged in the pipeline to prevent the spray nozzle 8 from being blocked, so that the muddy water acts on the intake pipe 2 for preliminary spray dust removal;

[0032] At the same time, the recycled muddy water acts on the double-shaft mixer for dust removal. The double-shaft stirring and spraying assembly 14 includes a spray pipe 19 and a spray head 20. The spray pipe 19 is connected to the side wall of the sewage discharge pipe 3. The spray pipe 19 is arranged in parallel with the sewage discharge pipe 3. The spray head 20 is connected to the water outlet end of the spray pipe 19 and is used for spraying and dust removal of the double-shaft mixer. A pneumatic ball valve III 21 is arranged in the middle section of the spray pipe 19 to control the on-off of the spray pipe 19. When the pneumatic ball valve III 21 is opened, the muddy water enters the spray head 20 through the spray pipe 19 and is sprayed out by the spray head 20 to spray and dust the double-shaft mixer.

[0033] When it is necessary to supplement clean water into the dust removal tank 1, the water inlet assembly 13 includes a water inlet pipe 15 and a connecting pipe 16. The water inlet pipe 15 is connected to one side of the dust removal tank 1, so that the sewage pipe and the water inlet pipe 15 are connected in parallel. The water inlet pipe 15 is externally connected to a water supply device. A water level sensor 25 is arranged on the upper wall inside the dust removal tank 1. The water level sensor 25 is electrically connected to the PLC control system and is used to regulate the water inlet inside the dust removal tank 1. Clean water is supplemented into the dust removal tank 1 through the water inlet pipe 15. A manual ball valve 17 is arranged at the water inlet end of the water inlet pipe 15, and an electric water inlet regulating valve 26 is arranged in the middle section of the water inlet pipe 15. The electric water inlet regulating valve 26 is located between the connecting pipe and the dust removal tank 1. The on-off of the water inlet pipe 15 is realized by opening and closing the manual ball valve 17 and the electric water inlet regulating valve 26. When the manual ball valve 17 and the electric water inlet regulating valve 26 are all opened, the external water supply device supplies water into the dust removal tank 1;

[0034] The connecting pipe 16 is connected between the sewage pipe and the water inlet pipe 15. A pneumatic ball valve 27 is connected to the middle section of the connecting pipe 16, and a pneumatic ball valve 18 is connected to the middle section of the sewage discharge pipe 3. The pneumatic ball valve 27 is located on one side of the output end of the pneumatic ball valve 18. The pneumatic ball valve 18 is used for the on-off of the sewage discharge pipe 3, and the pneumatic ball valve 27 is used for the on-off of the connecting pipe 16. Opening the manual ball valve 17 and the pneumatic ball valve 27 and closing the electric water inlet regulating valve 26 and the pneumatic ball valve 18 can be used for the cleaning of the sewage discharge pipe 3.

[0035] When the muddy water inside the dust removal box 1 is emptied and the inside of the dust removal box 1 is detected for emptying, a sewage discharge mechanism 9 is provided at the bottom of the dust removal box 1. The sewage discharge mechanism 9 is located at the lower part of the dust removal box 1 and is used for the detection and emptying of the sludge inside the dust removal box 1. The sewage discharge mechanism 9 includes a maintenance and emptying pipe 10, and the maintenance and emptying pipe 10 is connected to the bottom of the dust removal box 1. A manual cut-off valve 11 is arranged in the middle section of the maintenance and emptying pipe 10. When the muddy water inside the dust removal box 1 is emptied through the sewage discharge pipe 3, the manual cut-off valve 11 is opened, and the inside of the dust removal box 1 is checked through the maintenance and emptying pipe 10.

[0036] During specific use, the operator connects the air inlet pipe 2 to the outlet of the double-shaft mixer, and passes the dust-containing gas into the dust removal box 1 through the air inlet pipe 2. Inside the dust removal box 1, the dust-containing gas is centrifuged by the cyclone generator 7 and forced to contact the water body, and the water body is used to capture the solid particles in the dust-containing gas and mix with the water body to generate muddy water, realizing the preliminary dust reduction of the dust-containing gas.

[0037] In order to avoid the sedimentation of sludge inside the dust removal box 1, the submersible agitator 24 is driven to rotate, and the muddy water is pumped into the waste pit through the sewage discharge pipe 3 by the sewage pump 12. The pneumatic ball valve 18 is used for the on-off control of the sewage pump.

[0038] When the muddy water inside the dust removal box 1 is recycled, the muddy water is pumped into the spray nozzle 8 by the sewage pump 12 to spray and reduce the dust of the dust-containing gas flowing in the air inlet pipe 2. At the same time, the pneumatic ball valve 21 is controlled to open, and the muddy water enters the spray head 20 through the spray pipe 19 and is sprayed out by the spray head 20 to spray and reduce the dust of the double-shaft mixer, realizing the recycling of the muddy water.

[0039] After the sewage pump 12 discharges the muddy water, the water body inside the dust removal box 1 decreases. The water inlet assembly 13 is used to supplement clean water into the dust removal box 1. When the water level sensor 25 detects that the water body inside the dust removal box 1 decreases, the manual ball valve 17 and the electric water inlet regulating valve 26 are opened, so that the external water supply device supplies clean water into the dust removal box 1 through the water inlet pipe 15 to adjust the balance of the water body inlet and outlet of the dust removal box 1.

[0040] The dust-containing gas after the initial dust reduction is introduced into the demisting chamber 4 for secondary dust reduction treatment. The fan motor 23 drives the centrifugal fan 22 to rotate inside the demisting chamber 4 for the secondary centrifugal separation of the dust-containing gas. The gas after the secondary separation is discharged into the atmosphere.

[0041] Finally, after the muddy water in the dust removal tank 1 is emptied through the sewage discharge pipe 3, open the manual isolation valve 11, discharge the remaining sludge in the dust removal tank 1 through the maintenance emptying pipe 10, and check the internal situation of the dust removal tank 1.

[0042] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. In summary, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative efforts without departing from the purpose of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A dust-containing gas purification wet dust collector, comprising a dust removal box, water is stored in the dust removal box, an air inlet pipe and a sewage pipe are provided on one side of the dust removal box, the dust removal box is connected to the outlet of the double-shaft mixer through the air inlet pipe, and the other end of the sewage pipe is connected to a wastewater pit, characterized in that: It also includes a defogger chamber and a water distribution mechanism. The water distribution mechanism is connected to the side of the dust removal box close to the air inlet pipe and is connected to the sewage pipe for adjusting the balance of water inlet and outlet in the dust removal box. The defogger chamber pipeline is connected to the side of the dust removal box away from the water distribution mechanism for secondary dust reduction and discharge of the gas.

2. A wet dust collector for purifying dusty gas according to claim 1, characterized in that: The dust removal box also includes an air intake spray mechanism and a cyclone generator. The air intake spray mechanism is arranged at the upper inner part of the air intake pipe, and the cyclone generator is arranged at the upper inner part of the dust removal box to separate the centrifugal dust and gas and contact it with the water body.

3. A wet dust collector for purifying dusty gas according to claim 2, characterized in that: The air intake spray mechanism comprises a spray nozzle, which is fixedly connected to the inner upper wall of the air intake pipe and is used for the initial spraying of dust-containing gas to reduce dust.

4. A wet dust collector for purifying dusty gas according to claim 2, characterized in that: A sewage discharge mechanism is provided at the bottom of the dust removal box. The sewage discharge mechanism is located at the lower part of the dust removal box and is used for detecting and emptying the sludge inside the dust removal box. The sewage discharge mechanism includes a maintenance sewage discharge pipe, which is connected to the bottom of the dust removal box. A manual isolation valve is provided in the middle section of the maintenance sewage discharge pipe.

5. A wet dust collector for purifying dusty gas according to claim 1 or 3, characterized in that: The end of the sewage pipe away from the wastewater pit is connected to a sewage pump, the sewage pump is located inside the dust removal box, the sewage pipe is connected to the water outlet end of the sewage pump, and the sewage pump is connected to the spray nozzle by a pipeline.

6. A wet dust collector for purifying dusty gas according to claim 1, characterized in that: The water distribution mechanism includes a water inlet assembly and a double-axis stirring and spraying assembly. The water inlet assembly is connected to one side of the dust removal box, and the double-axis stirring and spraying assembly is connected to the side wall of the sewage pipe. At least one group of double-axis stirring and spraying assemblies is provided.

7. A wet dust collector for purifying dusty gas according to claim 6, characterized in that: The water inlet assembly includes a water inlet pipe and a connecting pipe, wherein the water inlet pipe is connected to one side of the dust removal box, and the connecting pipe is connected between the sewage pipe and the water inlet pipe, so that the sewage pipe and the water inlet pipe are connected in parallel; A manual ball valve is provided at the water inlet end of the water inlet pipe, and an electric water inlet regulating valve is provided in the middle section of the water inlet pipe, and the electric water inlet regulating valve is located between the connecting pipe and the dust removal box; The middle section of the connecting pipe is connected to a pneumatic ball valve 1, the middle section of the sewage pipe is connected to a pneumatic ball valve 2, and the pneumatic ball valve 1 is located at one side of the output end of the pneumatic ball valve 2.

8. A wet dust collector for purifying dusty gas according to claim 6, characterized in that: The double-axis stirring spray assembly includes a spray pipe and a spray head. The spray pipe is connected to the side wall of the sewage pipe. The spray pipe and the sewage pipe are arranged in parallel. The spray head is connected to the water outlet end of the spray pipe and is used for spraying and dust reduction of the double-axis mixer. A pneumatic ball valve three is provided in the middle section of the spray pipe.

9. A wet dust collector for purifying dusty gas according to claim 1, characterized in that: The demisting chamber also includes a centrifugal fan and a fan motor. The centrifugal fan is arranged in the demisting chamber. The fan motor is connected to a centrifugal fan belt. The centrifugal fan is driven by the fan motor to rotate inside the demisting chamber for secondary centrifugal separation of dust and gas.

10. A wet dust collector for purifying dusty gas according to claim 1, characterized in that: A submersible agitator is provided inside the dust removal box, and a water level sensor is provided on the upper inner wall of the dust removal box. The water level sensor is electrically connected to the PLC control system and is used to regulate water inflow into the dust removal box.

Images