A dust removal and denitration device for flue gas of a thermal power boiler
By combining an electrostatic treatment device and a catalytic reduction reactor, the problem of low dust removal efficiency in existing technologies has been solved, achieving efficient flue gas purification and improving dust removal and denitrification effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIHUAYI WEIYUAN CHEM CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-09
AI Technical Summary
Existing flue gas dust removal and denitrification devices for thermal power boilers have a single processing structure during desulfurization, resulting in low dust removal efficiency and the need for secondary treatment, which is not effective.
The system combines an electrostatic treatment device and a catalytic reduction reactor. It uses an electrostatic field to charge and adsorb dust particles, and combines a porous dust removal fiber layer with a catalytic reduction layer loaded with an active metal catalyst to achieve multi-stage treatment.
It improves the dust removal efficiency of a single treatment, achieves efficient flue gas purification, reduces the need for secondary treatment, and enhances the dust removal and denitrification effect.
Smart Images
Figure CN224331882U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas treatment technology, specifically to a dust removal and denitrification device for flue gas from a thermal power boiler. Background Technology
[0002] With the rapid development of industrialization and urbanization in my country, the demand for electricity is gradually increasing. Cogeneration boilers, as important energy conversion equipment, play a vital role in power production. However, during the combustion process, cogeneration boilers produce a large amount of flue gas, which contains acidic gases such as sulfur oxides and nitrogen oxides, as well as particulate pollutants. Direct emission of these pollutants can cause serious environmental pollution, affect air quality, and endanger human health.
[0003] The prior art discloses a low-cost flue gas denitrification and dust removal device with announcement number CN107261792A, including a flue gas inlet pipe, a nitrogen oxide treatment chamber, a dust removal chamber, and an anti-clogging component. The inner wall of the flue gas inlet pipe is provided with a jacket, and a flow pipe is provided between the jackets. A circulation pipe is provided on the outside of the flue gas inlet pipe, and the flue gas inlet pipe is connected to the nitrogen oxide treatment chamber. At least two sets of filter elements are vertically arranged on the front side of the nitrogen oxide treatment chamber. A dosing pipe is provided on the outside of the nitrogen oxide treatment chamber, and the dosing pipe is connected to the filter elements. A dividing shaft is provided on the rear side of the nitrogen oxide treatment chamber, with one half of the dividing shaft located inside the nitrogen oxide treatment chamber and the other half located inside the dust removal chamber. The rear side of the dust removal chamber is made of non-woven fabric, which is an outwardly convex arc shape. An air outlet pipe is provided above the dust removal chamber, and a dust collection pipe is provided below the non-woven fabric. The anti-clogging component is installed on a column on the rear side of the dust removal chamber. The above device has good denitrification and dust removal effects, accelerates the utilization of waste heat of flue gas, saves energy, reduces costs, simplifies equipment, has a simple process, occupies a small area, and improves efficiency.
[0004] The aforementioned dust removal and denitrification device for flue gas from thermal power boilers can save energy, reduce costs, achieve good denitrification and dust removal effects, simplify equipment, have a simple process, occupy a small area, and improve efficiency. However, the internal processing structure of the aforementioned dust removal and denitrification device is limited to a single filter element during desulfurization and dust removal, requiring secondary processing. This results in low dust removal efficiency and poor performance during use, and improvements are needed. Utility Model Content
[0005] The purpose of this invention is to provide a dust removal and denitrification device for flue gas from a thermal power boiler, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a dust removal and denitrification device for flue gas from a thermal power boiler, comprising a first treatment tower and a second treatment tower, wherein a connecting treatment device is provided on the top of the first treatment tower, an electrostatic treatment device is provided inside the connecting treatment device, and an inlet pipe is provided on the back of the first treatment tower.
[0007] The electrostatic treatment device includes an electrostatic generator, connecting pipes, an outer connecting electrode, an intermediate connecting plate, an inner electrode, an absorption pipe, a diversion discharge pipe, a flue gas catalytic reactor, and an inner connecting plate. The connecting pipe is fixedly connected to the right side of the electrostatic generator, the outer connecting electrode is fixedly connected to the right side of the connecting pipe, the intermediate connecting plate is fixedly connected to the inner ring of the outer connecting electrode, the inner electrode is fixedly connected to the surface of the intermediate connecting plate, the flue gas catalytic reactor is fixedly connected to the right side of the inner electrode, the absorption pipe is fixedly connected to the left side of the flue gas catalytic reactor, the inner connecting plate is connected to the inside of the flue gas catalytic reactor, and the diversion discharge pipe is fixedly connected to the right side of the flue gas catalytic reactor.
[0008] Preferably, the connection and processing device includes a connecting pipe, a processing cylinder, a processing tank, a connecting plate, an upper shell, a connecting box, a connecting disc, a filter screen, a connecting column, and a dust removal fiber layer. The connecting pipe is fixedly connected to the top of the first processing tower, the processing cylinder is fixedly connected to the side of the connecting pipe, the processing tank is fixedly connected to the side of the processing cylinder, the connecting plate is fixedly connected to the upper and lower ends inside the processing tank, and the upper shell is fixedly connected to the top right side of the connecting plate.
[0009] Preferably, the electrostatic generator is fixedly connected to the bottom of the inside of the treatment tank, and the model of the electrostatic generator is ESD-20G.
[0010] Preferably, a catalytic reduction plate is fixedly connected to the bottom of the connecting plate, and the connecting column is fixedly connected to the left side of the catalytic reduction plate. The catalytic reduction reactor is filled with a highly efficient catalyst. After electrostatic dust removal, the flue gas enters the catalytic reduction reactor, where the high-valence nitrogen oxides react further under the action of the catalyst and are finally converted into N2 and discharged, completing the flue gas treatment process. The catalytic reaction formula is as follows: 6NO2 + 4H2O + catalyst == 3N2 + 8H + +4NO3 − .
[0011] Preferably, the dust removal fiber layer is fixedly connected to the surface of the connecting column, and the filter screen is fixedly connected to the left side of the surface of the connecting column.
[0012] Preferably, the end of the connecting pipe away from the top of the first processing tower is fixedly connected to the top of the second processing tower.
[0013] Preferably, the connecting box is fixedly connected to the right side of the upper housing, and the connecting plate is fixedly connected to the right side of the connecting box.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] The dust removal and denitrification device for flue gas from this thermal power boiler is equipped with an electrostatic treatment device. When the flue gas passes through the plasma zone, the NO in it reacts with the active substances in the plasma. The electrostatic field charges the dust particles in the flue gas and adsorbs them onto the collecting electrode, thus achieving the purpose of dust removal. It works in conjunction with the subsequent catalytic oxidation reaction treatment components to complete the flue gas treatment process. The multi-stage treatment can be completed in one go, and secondary treatment is required. The dust removal efficiency is high and the effect is good when in use.
[0016] The dust removal and denitrification device for the flue gas of this thermal power boiler is equipped with a connection and processing device. During the transmission process, the flue gas passes through a filter screen, a dust removal fiber layer, and a catalytic reduction layer. The dust removal fiber layer is made into a porous structure through a special weaving or sintering process to improve the dust collection efficiency. The catalytic reduction layer can be equipped with an active metal catalyst, which can react with a reducing agent under suitable temperature and flue gas atmosphere to reduce nitrogen oxides. The above device purifies the flue gas and completes the initial filtration of the flue gas. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0018] Figure 2 This is a three-dimensional structural diagram of the connection processing device of this utility model;
[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This is a three-dimensional structural diagram of the electrostatic treatment device of this utility model;
[0021] Figure 5 This is a three-dimensional front view of the electrostatic treatment device of this utility model;
[0022] Figure 6 This utility model Figure 5 Enlarged structural diagram at point B.
[0023] In the diagram: 1. First processing tower; 2. Second processing tower; 3. Connecting processing device; 301. Connecting pipe; 302. Processing cylinder; 303. Processing tank; 304. Connecting plate; 305. Upper shell; 306. Connecting box; 307. Connecting disc; 308. Filter screen; 309. Connecting column; 310. Dust removal fiber layer; 4. Electrostatic treatment device; 401. Electrostatic generator; 402. Connecting pipe; 403. Outer connecting electrode; 404. Intermediate connecting plate; 405. Inner electrode; 406. Absorption pipe; 407. Diversion discharge pipe; 408. Flue gas catalytic reactor; 409. Inner connecting plate. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-6 The present invention provides the following technical solution:
[0026] A dust removal and denitrification device for flue gas from a thermal power boiler includes a first treatment tower 1 and a second treatment tower 2. A connecting treatment device 3 is provided on the top of the first treatment tower 1, and an electrostatic treatment device 4 is provided inside the connecting treatment device 3. An inlet pipe is provided on the back of the first treatment tower 1.
[0027] The electrostatic treatment device 4 includes an electrostatic generator 401, a connecting pipe 402, an outer connecting electrode 403, an intermediate connecting plate 404, an inner electrode 405, an absorption pipe 406, a diversion discharge pipe 407, a flue gas catalytic reactor 408, and an inner connecting plate 409. The connecting pipe 402 is fixedly connected to the right side of the electrostatic generator 401, the outer connecting electrode 403 is fixedly connected to the right side of the connecting pipe 402, and the intermediate connecting plate 404 is fixedly connected to the inner ring of the outer connecting electrode 403. 405 is fixedly connected to the surface of the intermediate connecting plate 404. The flue gas catalytic reactor 408 is fixedly connected to the right side of the inner electrode 405. The absorption pipe 406 is fixedly connected to the left side of the flue gas catalytic reactor 408. The inner connecting plate 409 is connected to the inside of the flue gas catalytic reactor 408. The diversion discharge pipe 407 is fixedly connected to the right side of the flue gas catalytic reactor 408. The electrostatic generator 401 is fixedly connected to the bottom of the inside of the treatment tank 303. The model of the electrostatic generator 401 is ESD-20G.
[0028] The connection processing device 3 includes a connecting pipe 301, a processing cylinder 302, a processing tank 303, a connecting plate 304, an upper housing 305, a connecting box 306, a connecting plate 307, a filter screen 308, a connecting column 309, and a dust removal fiber layer 310. The connecting pipe 301 is fixedly connected to the top of the first processing tower 1. The processing cylinder 302 is fixedly connected to the side of the connecting pipe 301. The processing tank 303 is fixedly connected to the side of the processing cylinder 302. The connecting plate 304 is fixedly connected to the upper and lower ends inside the processing tank 303. The upper housing 305 is fixedly connected to the top right side of the connecting plate 304. The connecting box 306 is fixedly connected to the right side of the upper housing 305. The connecting plate... 307 is fixedly connected to the right side of the connecting box 306. A catalytic reduction plate is fixedly connected to the bottom of the connecting plate 307. The connecting column 309 is fixedly connected to the left side of the catalytic reduction plate. The catalytic reduction reactor is filled with a high-efficiency catalyst. After electrostatic dust removal, the flue gas enters the catalytic reduction reactor. The high-valence nitrogen oxides in the gas are further reduced under the action of the catalyst and finally converted into N2 and discharged, completing the flue gas treatment process. The dust removal fiber layer 310 is fixedly connected to the surface of the connecting column 309. The filter screen 308 is fixedly connected to the left side of the surface of the connecting column 309. The end of the connecting pipe 301 away from the top of the first treatment tower 1 is fixedly connected to the top of the second treatment tower 2.
[0029] In operation, boiler gas is introduced into the first treatment tower 1 through the inlet pipe on its back side. The gas then flows upwards through the interior of the first treatment tower 1 until it enters the connecting pipe 301, and then into the treatment tank 303. After entering, the gas is transported from left to right, passing through the filter screen 308, the dust-removing fiber layer 310, and the catalytic reduction layer. The dust-removing fiber layer 310 is made into a porous structure using a special weaving or sintering process to improve dust collection efficiency. The catalytic reduction layer can use a catalyst loaded with an active metal, which, under suitable temperature and flue gas atmosphere, can react with a reducing agent to reduce nitrogen oxides. This device purifies the flue gas, completing the initial filtration, before the gas enters the treatment tank 303 near the right side. The flue gas is further processed using an electrostatic treatment device 4. A plasma generator is installed to generate plasma through high-voltage discharge. When the flue gas passes through the plasma area, the NO in it reacts with the active substances in the plasma. The electrostatic field charges the dust particles in the flue gas and adsorbs them onto the collecting electrode, achieving the purpose of dust removal. Then, the flue gas that has undergone multiple treatments is drawn into the flue gas catalytic reactor 408 through the absorption pipe 406. The catalytic reduction reactor is filled with a highly efficient catalyst. After electrostatic dust removal, the flue gas enters the catalytic reduction reactor, where the high-valence nitrogen oxides in it further react under the action of the catalyst and are finally converted into N2 and discharged, completing the flue gas treatment process. Multi-stage treatment can be completed in one go, and secondary treatment is required. The dust removal efficiency is high and the effect is good when in use.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dust removal and denitrification device for flue gas from a thermal power boiler, comprising a first treatment tower (1) and a second treatment tower (2), characterized in that: The top of the first processing tower (1) is provided with a connection processing device (3), and the inside of the connection processing device (3) is provided with an electrostatic treatment device (4). The back of the first processing tower (1) is provided with an inlet pipe. The electrostatic treatment device (4) includes an electrostatic generator (401), a connecting pipe (402), an outer connecting electrode (403), an intermediate connecting plate (404), an inner electrode (405), an absorption pipe (406), a diversion discharge pipe (407), a flue gas catalytic reactor (408), and an inner connecting plate (409). The connecting pipe (402) is fixedly connected to the right side of the electrostatic generator (401), the outer connecting electrode (403) is fixedly connected to the right side of the connecting pipe (402), and the intermediate connecting plate (409) is fixedly connected to the right side of the connecting pipe (402). 404) is fixedly connected to the inner ring of the outer connecting electrode (403), the inner electrode (405) is fixedly connected to the surface of the intermediate connecting plate (404), the flue gas catalytic reactor (408) is fixedly connected to the right side of the inner electrode (405), the absorption pipe (406) is fixedly connected to the left side of the flue gas catalytic reactor (408), the inner connecting plate (409) is connected to the inside of the flue gas catalytic reactor (408), and the diversion discharge pipe (407) is fixedly connected to the right side of the flue gas catalytic reactor (408).
2. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 1, characterized in that: The connection processing device (3) includes a connecting pipe (301), a processing cylinder (302), a processing tank (303), a connecting plate (304), an upper shell (305), a connecting box (306), a connecting plate (307), a filter screen (308), a connecting column (309), and a dust removal fiber layer (310). The connecting pipe (301) is fixedly connected to the top of the first processing tower (1). The processing cylinder (302) is fixedly connected to the side of the connecting pipe (301). The processing tank (303) is fixedly connected to the side of the processing cylinder (302). The connecting plate (304) is fixedly connected to the upper and lower ends inside the processing tank (303). The upper shell (305) is fixedly connected to the top right side of the connecting plate (304).
3. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 1, characterized in that: The electrostatic generator (401) is fixedly connected to the bottom of the inside of the treatment tank (303).
4. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 2, characterized in that: The bottom of the connecting plate (307) is fixedly connected to a catalytic reduction plate, and the connecting column (309) is fixedly connected to the left side of the catalytic reduction plate.
5. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 2, characterized in that: The dust removal fiber layer (310) is fixedly connected to the surface of the connecting column (309), and the filter screen (308) is fixedly connected to the left side of the surface of the connecting column (309).
6. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 2, characterized in that: The end of the connecting pipe (301) away from the top of the first processing tower (1) is fixedly connected to the top of the second processing tower (2).
7. The dust removal and denitrification device for flue gas from a thermal power boiler according to claim 2, characterized in that: The connecting box (306) is fixedly connected to the right side of the upper housing (305), and the connecting plate (307) is fixedly connected to the right side of the connecting box (306).