Boiler flue gas pollutant treatment device
By introducing a pretreatment box and treatment tower into the boiler flue gas treatment device, cold air is sent to cool down and moisture and particles are separated, the problem of flue gas dew point corrosion is solved, ensuring the stable operation and efficient treatment of the subsequent treatment device.
Patent Information
- Application Number
- CN202421581375.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing boiler flue gas deep treatment devices lack pretreatment devices. The newly released flue gas is prone to smoke and dew point corrosion during the discharge process, and the high humidity will affect the subsequent device processing.
A boiler flue gas pollutant treatment device is designed, including a pretreatment box, cooling pipe, separation box and treatment tower. The cold air is sent into the fan for heat exchange and cooling, and the filter is used to separate the moisture and particles in the flue gas, and then desulfurization, denitrification and adsorption treatment are carried out in the treatment tower.
Effectively reduce the flue gas humidity, avoid atomization and corrosion of the device, ensure the normal operation of the subsequent treatment device, and improve the processing efficiency.
Smart Images
Figure CN223042484U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of boiler flue gas treatment, and specifically relates to a device for treating boiler flue gas pollutants. Background Art
[0002] During the operation of a boiler, a large amount of flue gas is emitted. The main pollutants in the flue gas of coal-fired boilers are dust, sulfides, and nitrogen oxides. In the field of boiler flue gas desulfurization and dust removal, the wet desulfurization method is currently widely used. To achieve better desulfurization effects, multiple devices are generally used in combination for treatment. The device for treating boiler flue gas pollutants is also one type in boiler flue gas.
[0003] For example, a patent with the publication number CN216457585U discloses a device for deeply treating multiple pollutants in boiler flue gas, including a treatment tank main body, a movable component, and a mounting component. A filter box is installed at the middle position of the smoke inlet pipe. A filter screen is movably installed inside the treatment tank main body through the movable component. The rotating disc drives one end of the movable connecting rod to perform circular motion. As one end of the movable connecting rod rotates, the movable connecting rod drives the push rod to repeatedly move inside the mounting frame. When the push rod moves repeatedly, it drives the filter screen to repeatedly move inside the filter box, facilitating the shaking off of the dust adhered to the surface of the filter screen and also pushing the dust on the inner wall of the filter box into the dust outlet for dust collection. When the filter screen moves, the movable ring is driven to move through the mounting rod, and under the action of the return spring, a good buffering effect is achieved.
[0004] However, the device for deeply treating multiple pollutants in boiler flue gas in this application lacks a pretreatment device for flue gas. The freshly discharged flue gas is prone to forming smoke and dew point corrosion during the emission process, and the high humidity will affect the treatment of subsequent devices. Summary of the Utility Model
[0005] The purpose of this application is to provide a device for treating boiler flue gas pollutants to solve the problem that the device for deeply treating multiple pollutants in boiler flue gas in the above-mentioned application lacks a pretreatment device for flue gas, and the freshly discharged flue gas is prone to forming smoke and dew point corrosion during the emission process, and the high humidity will affect the treatment of subsequent devices.
[0006] The technical solution adopted in this application is as follows: A boiler flue gas pollutant treatment device includes a boiler. A boiler pipe is fixedly connected to the side end of the boiler. A pretreatment box is fixedly connected to the top end of the boiler pipe. A blower is fixedly installed on the top of the pretreatment box. An air inlet pipe is fixedly connected to the side end of the blower. The other end of the air inlet pipe away from the blower is fixedly connected to the boiler pipe. A cooling pipe is fixedly connected to the top end of the boiler pipe and inside the pretreatment box. A separation box is fixedly installed on the top end of the cooling pipe. A temperature detection platform is fixedly installed on the top of the separation box. A flue gas pipe is fixedly connected to the top side end of the separation box. An exhaust pipe is fixedly connected to the side end of the pretreatment box and below the flue gas pipe. The other end of the flue gas pipe away from the pretreatment box is fixedly installed with a treatment tower.
[0007] By adopting the above technical solution, the flue gas in the boiler is sent to the cooling pipe inside the pretreatment box through the boiler pipe. Then, the blower is started, and the cooling air is sent into the pretreatment box through the air inlet pipe to exchange heat and cool down the flue gas in the cooling pipe and the separation box. The water condensed during the flue gas cooling and some solid particle impurities will be filtered at the filter screen and then discharged from the drain pipe, so that some particles and moisture in the flue gas can be separated. The temperature in the separation box can be observed through the temperature detection platform. During the heat exchange and cooling process, the exchanged air can be discharged from the exhaust pipe. When the heat exchange and cooling of the flue gas inside the separation box are completed, the air valve can be opened to discharge the flue gas from the flue gas pipe and send it into the treatment tower for desulfurization, denitrification, and filtration adsorption treatment.
[0008] In a preferred embodiment, a filter screen is fixedly installed inside the separation box and below the cooling pipe. A drain pipe is fixedly connected to the bottom end inside the separation box.
[0009] By adopting the above technical solution, the filter screen is located below the inlet of the cooling pipe, which is convenient for separating and filtering the moisture and some particles during the condensation process.
[0010] In a preferred embodiment, an air valve is installed on the surface of the flue gas pipe, and a water valve is installed on the bottom side end of the drain pipe.
[0011] By adopting the above technical solution, the water valve can control the discharge of sewage in the drain pipe.
[0012] In a preferred embodiment, a desulfurization chamber is opened at the bottom end inside the treatment tower. A denitrification chamber is opened above the desulfurization chamber inside the treatment tower. An adsorption chamber is opened above the desulfurization chamber inside the treatment tower.
[0013] By adopting the above technical solution, devices for desulfurization, denitrification, and adsorption are sequentially arranged from bottom to top inside the treatment tower.
[0014] In a preferred embodiment, an alkaline solution tank is fixedly installed on the side of the treatment tower and close to the desulfurization chamber. A spray head is fixedly installed inside the desulfurization chamber, and a dust removal tank is installed at the bottom side end of the desulfurization chamber.
[0015] By adopting the above technical solution, the inside of the alkaline solution tank is used to store the solution for spraying, such as limestone slurry or alkaline solution, to adsorb sulfur dioxide in the flue gas, and the by-products are convenient to process. The spray head is used to spray the liquid. The dust removal tank is used to process the by-products, and the by-products can be taken out by opening the dust removal tank.
[0016] In a preferred embodiment, a gas transmission pipe is fixedly connected to the top end of the desulfurization chamber. A catalytic box is fixedly installed at the top end of the gas transmission pipe and inside the denitration chamber, and an ammonia tank is fixedly connected to the side end of the catalytic box.
[0017] By adopting the above technical solution, the valve at the gas transmission pipe is opened to send the flue gas into the catalytic box, and ammonia is sent into the catalytic box through the ammonia tank, so that ammonia reacts with nitrogen oxides to produce harmless nitrogen and water.
[0018] In a preferred embodiment, an activated carbon adsorption box is fixedly connected to the top end of the catalytic box and inside the adsorption chamber.
[0019] By adopting the above technical solution, the activated carbon adsorption box is used to filter and adsorb the flue gas after desulfurization again.
[0020] In a preferred embodiment, a smoke exhaust port is opened at the top end of the treatment tower.
[0021] By adopting the above technical solution, the activated carbon adsorption box is used to filter and adsorb the flue gas after desulfurization again.
[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present application are as follows:
[0023] In the present application, the fan is started, and the cooling air is sent into the pretreatment box through the air inlet pipe to exchange heat and cool down the flue gas in the cooling pipe and the separation box. The water and some solid particle impurities condensed during the cooling of the flue gas will be filtered at the filter screen and then discharged from the drain pipe, so that part of the particles and moisture in the flue gas can be separated. The temperature in the separation box can be observed through the temperature detection platform. During the heat exchange and cooling, the exchanged air can be discharged from the exhaust pipe. When the heat exchange and cooling of the flue gas in the separation box are completed, the gas valve can be opened to discharge the flue gas from the smoke pipe into the treatment tower for desulfurization, denitration, filtration and adsorption treatment. This device can cool down and dehydrate the flue gas from the steel furnace, avoid the corrosion of the atomized flue gas to the device, affect the subsequent flue gas treatment device, and avoid the damage of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic structural diagram of a boiler flue gas pollutant treatment device in this application;
[0025] Figure 2 It is a plan view of the internal structure of the pretreatment device in this application;
[0026] Figure 3 It is a plan view of the internal structure of the treatment tower in this application.
[0027] Markings in the figure: 1. Boiler; 2. Boiler tube; 3. Pretreatment box; 4. Treatment tower; 5. Fan; 6. Exhaust pipe; 7. Intake pipe; 8. Cooling pipe; 9. Separation box; 10. Temperature detection platform; 11. Gas valve; 12. Flue gas pipe; 13. Filter screen; 14. Drain pipe; 15. Water valve; 16. Desulfurization chamber; 17. Denitrification chamber; 18. Adsorption chamber; 19. Activated carbon adsorption box; 20. Smoke outlet; 21. Sprinkler; 22. Alkaline solution tank; 23. Dust removal tank; 24. Gas transmission pipe; 25. Ammonia tank; 26. Catalytic box. Specific implementation manners
[0028] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts shall fall within the protection scope of this application.
[0029] Embodiment:
[0030] Refer to Figures 1 - 3, including a boiler 1, a boiler pipe 2 is fixedly connected to the side end of the boiler 1, a pretreatment tank 3 is fixedly connected to the top end of the boiler pipe 2, a blower 5 is fixedly installed on the top of the pretreatment tank 3, an air inlet pipe 7 is fixedly connected to the side end of the blower 5, the other end of the air inlet pipe 7 away from the blower 5 is fixedly connected to the boiler pipe 2, a cooling pipe 8 is fixedly connected to the top end of the boiler pipe 2 and inside the pretreatment tank 3, a separation tank 9 is fixedly installed at the top end of the cooling pipe 8, a temperature detection platform 10 is fixedly installed on the top of the separation tank 9, a flue gas pipe 12 is fixedly connected to the top side end of the separation tank 9, an exhaust pipe 6 is fixedly connected to the side end of the pretreatment tank 3 and below the flue gas pipe 12. The other end of the flue gas pipe 12 away from the pretreatment tank 3 is fixedly installed with a treatment tower 4. The inside of the pretreatment tank 3 is used to cool the flue gas input from the boiler pipe 2, so that the moisture in the flue gas condenses and the water content is reduced. During use, the flue gas in the boiler 1 can be sent to the cooling pipe 8 inside the pretreatment tank 3 through the boiler pipe 2. Then, start the blower 5 to send the cooling air into the pretreatment tank 3 through the air inlet pipe 7 to exchange heat and cool the flue gas in the cooling pipe 8 and the separation tank 9. The condensed water and some solid particle impurities in the flue gas during cooling will be filtered at the filter screen 13 and then discharged from the drain pipe 14, so that some particles and moisture in the flue gas can be separated. The temperature in the separation tank 9 can be observed through the temperature detection platform 10. During heat exchange and cooling, the exchanged air can be discharged from the exhaust pipe 6. When the heat exchange and cooling of the flue gas inside the separation tank 9 are completed, the air valve 11 can be opened to discharge the flue gas from the flue gas pipe 12 and send it into the treatment tower 4 for desulfurization, denitrification, filtration and adsorption treatment.
[0031] Refer to Figure 2 , a filter screen 13 is fixedly installed inside the separation tank 9 and below the cooling pipe 8, and a drain pipe 14 is fixedly connected to the bottom end inside the separation tank 9. The filter screen 13 is located below the inlet of the cooling pipe 8, which is convenient for separating and filtering the moisture and some particles during the condensation process.
[0032] Refer to Figure 2 , an air valve 11 is installed on the surface of the flue gas pipe 12, and a water valve 15 is installed on the bottom side end of the drain pipe 14. The sewage discharge in the drain pipe 14 can be controlled through the water valve 15.
[0033] Refer to Figure 3 , a desulfurization chamber 16 is opened at the bottom end inside the treatment tower 4, a denitrification chamber 17 is opened above the desulfurization chamber 16 inside the treatment tower 4, and an adsorption chamber 18 is opened above the desulfurization chamber 16 inside the treatment tower 4. The devices for desulfurization, denitrification and adsorption are arranged in sequence from bottom to top inside the treatment tower 4.
[0034] Refer to Figure 3, on the side of the processing tower 4 near the desulfurization chamber 16, an alkaline solution tank 22 is fixedly installed. Inside the desulfurization chamber 16, a spray head 21 is fixedly installed. At the bottom side of the desulfurization chamber 16, a dust removal tank 23 is installed. The inside of the alkaline solution tank 22 is used to store the solution for spraying, such as limestone slurry or alkaline solution, to adsorb sulfur dioxide in the flue gas and facilitate the treatment of by-products. The spray head 21 is used to spray the liquid. The dust removal tank 23 is used to treat the by-products.
[0035] Refer to Figure 3 , at the top of the desulfurization chamber 16, an air delivery pipe 24 is fixedly connected. At the top of the air delivery pipe 24 and inside the denitrification chamber 17, a catalytic box 26 is fixedly installed. At the side of the catalytic box 26, an ammonia tank 25 is fixedly connected. After the desulfurization treatment is completed, the valve at the air delivery pipe 24 can be opened to send the flue gas into the inside of the catalytic box 26, and ammonia is sent into the inside through the ammonia tank 25 to react ammonia with nitrogen oxides to produce harmless nitrogen and water.
[0036] Refer to Figure 3 , at the top of the catalytic box 26 and inside the adsorption chamber 18, an activated carbon adsorption box 19 is fixedly connected. The activated carbon adsorption box 19 is used to filter and adsorb the flue gas after desulfurization again.
[0037] Refer to Figure 3 , at the top of the processing tower 4, a smoke exhaust port 20 is opened. The smoke exhaust port 20 can discharge the harmless flue gas after the treatment is completed.
[0038] The implementation principle of an embodiment of the boiler flue gas pollutant treatment device in this application is as follows: During use, the flue gas in the boiler 1 can be sent to the internal cooling pipe 8 of the pretreatment tank 3 through the boiler pipe 2. Then, the fan 5 is started, and the cooling air is sent into the pretreatment tank 3 through the air inlet pipe 7 to exchange heat and cool down the flue gas in the cooling pipe 8 and the separation tank 9. The condensed water and some solid particle impurities during the cooling of the flue gas will be filtered at the filter screen 13 and then discharged from the drain pipe 14, so that some particles and moisture in the flue gas can be separated. The sewage discharge in the drain pipe 14 can be controlled through the water valve 15. The filter screen 13 is located below the inlet of the cooling pipe 8, which is convenient for separating and filtering the moisture and some particles during the condensation process. The temperature of the separation tank 9 can be observed through the temperature detection platform 10. During the heat exchange and cooling process, the exchanged air can be discharged from the exhaust pipe 6. When the heat exchange and cooling of the flue gas in the separation tank 9 are completed, the gas valve 11 can be opened to discharge the flue gas from the flue gas pipe 12 and send it to the inside of the treatment tower 4 for desulfurization, denitrification, filtration and adsorption treatment. The inside of the alkaline solution tank 22 is used to store the solution for spraying, such as limestone slurry or alkaline solution, to adsorb sulfur dioxide in the flue gas, and the by-products are convenient to process. The spray head 21 is used to spray the liquid. The dust removal tank 23 is used to process the by-products. After the desulfurization treatment is completed, the valve at the gas transmission pipe 24 can be opened to send the flue gas into the inside of the catalytic tank 26, and ammonia gas is sent into it through the ammonia gas tank 25 to react ammonia gas with nitrogen oxides to produce harmless nitrogen and water. Finally, the flue gas is sent into the inside of the activated carbon adsorption tank 19 for adsorption treatment. This device can cool down and dehydrate the flue gas from the steel furnace, which can avoid the corrosion of the atomized flue gas to the device, affect the subsequent flue gas treatment device, and avoid the damage of the device.
[0039] The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A boiler flue gas pollutant treatment device, comprising a boiler (1), characterized in that: The side end of the boiler (1) is fixedly connected to a boiler tube (2), the top end of the boiler tube (2) is fixedly connected to a pretreatment box (3), the top of the pretreatment box (3) is fixedly installed with a fan (5), the side end of the fan (5) is fixedly connected to an air intake pipe (7), the other end of the air intake pipe (7) away from the fan (5) is fixedly connected to the boiler tube (2), the top end of the boiler tube (2) and located inside the pretreatment box (3) is fixedly connected to a cooling pipe (8), the top end of the cooling pipe (8) is fixedly installed with a separation box (9), the top of the separation box (9) is fixedly installed with a temperature detection platform (10), the top side end of the separation box (9) is fixedly connected to a flue gas pipe (12), the side end of the pretreatment box (3) and located below the flue gas pipe (12) is fixedly connected to an exhaust pipe (6), and the other end of the flue gas pipe (12) away from the pretreatment box (3) is fixedly installed with a treatment tower (4).
2. A boiler flue gas pollutant treatment device as claimed in claim 1, characterized in that: A filter screen (13) is fixedly installed inside the separation box (9) and below the cooling pipe (8), and a drainage pipe (14) is fixedly connected to the bottom end of the separation box (9).
3. A boiler flue gas pollutant treatment device as claimed in claim 2, characterized in that: An air valve (11) is installed on the surface of the smoke pipe (12), and a water valve (15) is installed on the bottom side of the drainage pipe (14).
4. A boiler flue gas pollutant treatment device as claimed in claim 1, characterized in that: A desulfurization chamber (16) is provided at the bottom of the treatment tower (4), a denitrification chamber (17) is provided inside the treatment tower (4) and above the desulfurization chamber (16), and an adsorption chamber (18) is provided inside the treatment tower (4) and above the desulfurization chamber (16).
5. A boiler flue gas pollutant treatment device as claimed in claim 1, characterized in that: An alkaline solution tank (22) is fixedly installed at the side end of the treatment tower (4) and close to the desulfurization chamber (16), a nozzle (21) is fixedly installed inside the desulfurization chamber (16), and a dust removal tank (23) is installed at the bottom side end of the desulfurization chamber (16).
6. A boiler flue gas pollutant treatment device as claimed in claim 4, characterized in that: The top of the desulfurization chamber (16) is fixedly connected to a gas supply pipe (24), the top of the gas supply pipe (24) and a catalyst box (26) is fixedly installed inside the denitration chamber (17), and the side end of the catalyst box (26) is fixedly connected to an ammonia box (25).
7. A boiler flue gas pollutant treatment device as claimed in claim 6, characterized in that: An activated carbon adsorption box (19) is fixedly connected to the top of the catalyst box (26) and located inside the adsorption chamber (18).
8. A boiler flue gas pollutant treatment device as claimed in claim 1, characterized in that: A smoke exhaust port (20) is provided at the top of the treatment tower (4).