Dust removal, desulfurization and denitration equipment

Abstract

This utility model provides a dust removal, desulfurization, and denitrification equipment, belonging to the field of flue gas treatment technology. It includes a dust removal unit, a desulfurization unit, and a denitrification unit for treating flue gas dust. The dust removal unit includes a buffer tank, with a dust collection box located on the outside of the buffer tank's outlet. A cover plate is threaded to the bottom of the buffer tank. The inlet of the dust collection box is connected to the outlet of the buffer tank, the outlet of the dust collection box is connected to the inlet of the desulfurization unit, and the inlet of the buffer tank is connected to the outlet of the denitrification unit. A filter screen is installed inside the dust collection box, and an electric telescopic rod is installed on the box wall. A cleaning component is located at the telescopic end of the electric telescopic rod inside the dust collection box. This utility model achieves the storage and protection of the cleaning brush through the coordinated operation of the dust removal mechanism, the cleaning component, and the sealing component, preventing it from losing its cleaning ability due to long-term exposure to a dusty environment.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas treatment technology, specifically relating to a dust removal, desulfurization, and denitrification device. Background Technology

[0002] Flue gas dust removal, desulfurization, and denitrification are three important environmental protection processes used in the industrial field to purify emitted flue gas. They are mainly used to reduce air pollution. They respectively remove particulate matter (dust), sulfur oxides (mainly sulfur dioxide SO2), and nitrogen oxides (mainly NOx) from flue gas. Currently, specialized dust removal, desulfurization, and denitrification equipment is required when performing dust removal, desulfurization, and denitrification on flue gas.

[0003] Existing dust removal, desulfurization, and denitrification equipment typically employs a combination of dust removal, desulfurization, and denitrification structures to treat flue gas. While these structures can effectively treat flue gas, several issues remain in actual operation. For example, after prolonged use, dust accumulates on the filter surfaces of the dust removal structure, leading to blockages. Although existing systems use cleaning brushes to maintain filtration efficiency, these brushes are typically exposed to dust, causing them to become covered in dust and lose their cleaning ability. This further shortens the overall performance and lifespan of the equipment. Utility Model Content

[0004] In view of this, the present invention provides a dust removal, desulfurization and denitrification equipment, which can achieve the storage and protection of the cleaning brush through the coordinated cooperation of the dust removal mechanism, cleaning component and sealing component, to prevent it from being exposed to the dusty environment for a long time and losing its cleaning ability, thereby improving the overall performance and service life of the equipment, while ensuring that the storage box forms a good sealed environment to prevent dust from entering the storage box and contaminating the cleaning brush.

[0005] To solve the above-mentioned technical problems, this utility model provides a dust removal, desulfurization, and denitrification equipment, including a dust removal unit, a desulfurization unit, and a denitrification unit for treating flue gas. The dust removal unit includes a buffer tank, and a dust collection box is provided on the outside of the outlet end of the buffer tank. A cover plate is threadedly connected to the bottom of the buffer tank. The inlet end of the dust collection box is connected to the outlet end of the buffer tank, the outlet end of the dust collection box is connected to the inlet end of the desulfurization unit, and the inlet end of the buffer tank is connected to the outlet end of the denitrification unit. A filter screen is provided in the inner cavity of the dust collection box, and an electric telescopic rod is installed on the wall of the dust collection box. A cleaning component is provided at the telescopic end of the electric telescopic rod located in the inner cavity of the dust collection box, which realizes the storage and protection of the cleaning brush, preventing it from being exposed to the dusty environment for a long time and losing its cleaning ability, thereby improving the overall performance and service life of the equipment.

[0006] The cleaning assembly includes a mounting plate located at the telescopic end of the electric telescopic pole. The mounting plate has symmetrically distributed fixing plates at both ends. Each fixing plate has a cleaning brush on its outer side. The cleaning brush contacts the filter surface of the adjacent filter screen on the same side, thus cleaning the filter surface of the filter screen.

[0007] The cleaning assembly also includes storage boxes symmetrically arranged on the outer wall of the inner cavity of the buffer tank. The side of the storage box closest to the buffer tank has an open structure. The storage box is movably inserted into the adjacent cleaning brush on the same side. The opening of the storage box corresponds to the adjacent fixing plate on the same side, thus realizing the storage of the cleaning brush.

[0008] Each cleaning brush is equipped with a vibration motor, which provides a vibration source.

[0009] It also includes a sealing component, which includes sealing plates that are slidably connected inside the storage box, thus serving a sealing function.

[0010] The sealing assembly also includes springs symmetrically arranged at both ends of the outer side of the sealing plate. The outer ends of the springs are fixedly connected to the grooves corresponding to the inner side of the dust collection box. The storage box is provided with openings that match the springs, thus providing elastic force.

[0011] The desulfurization unit includes a desulfurization tower, the inlet of which is connected to the outlet of a buffer tank via a connecting pipe. A demister is installed at the top of the inner cavity of the desulfurization tower, and a spray layer is installed above the inlet of the desulfurization tower to rapidly desulfurize the flue gas.

[0012] The denitrification unit includes a flue, the outlet of which is connected to the inlet of a buffer tank via a pipe. The inner cavity of the flue is equipped with an ammonia injection grid, and an SCR reactor is located below the ammonia injection grid in the inner cavity of the flue, which performs rapid denitrification of the flue gas.

[0013] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0014] 1. The flue gas first enters the dust collection box, where particulate matter is initially filtered through filters at both ends of the inner cavity. The dust-removed flue gas then enters the desulfurization and denitrification units for desulfurization and denitrification, thus achieving dust removal, desulfurization, and denitrification of the flue gas. As the equipment operates for an extended period, the electric telescopic rod is activated, and its telescopic end drives the cleaning brushes on the mounting plate and fixed plate to move synchronously, thereby cleaning the filter surface of the filter screen to restore filtration efficiency. After cleaning, the electric telescopic rod drives the cleaning brushes on the fixed plate to reset, and finally the cleaning brushes are inserted into the storage box. The mounting plate and the opening of the storage box are sealed to achieve storage protection, preventing them from being exposed to the dusty environment for a long time and losing their cleaning ability, thus improving the overall performance and service life of the equipment.

[0015] 2. Flue gas enters the flue, where ammonia or urea solution is injected as a reducing agent through an ammonia injection grid. A static mixer optimizes the airflow distribution, ensuring uniform mixing of the reducing agent and NOx in the flue gas. The mixed flue gas then enters the SCR reactor, where a reduction reaction occurs within a temperature range of –℃ under the action of the catalyst module: V□O□-WO□ / TiO2 substrate, converting NOx into N2 and H□O. The denitrified flue gas is then introduced into a buffer tank, where heavier particles naturally fall to the bottom, while lighter particles enter the dust collector along with the flue gas. A filter screen filters out particulate matter from the flue gas. The dust-removed flue gas then enters the desulfurization tower, where… Limestone powder is mixed with water to prepare a slurry, which is then transported to the slurry zone of the desulfurization tower. The limestone slurry is sprayed downwards through a spray layer, allowing it to fully contact the flue gas flowing upwards in the opposite direction. This process absorbs SO2 from the flue gas, generating a slurry containing calcium sulfite. The slurry in the desulfurization tower is then pumped back to the spray layer for recycling. Simultaneously, oxidizing air is blown into the desulfurization tower to oxidize the calcium sulfite into calcium sulfate. The desulfurized flue gas passes through a demister at the top of the desulfurization tower to remove droplets, resulting in purified flue gas. The tower bottom slurry is then concentrated by a hydrocyclone and dehydrated by a vacuum belt filter, producing gypsum with a moisture content of <%. The clean flue gas after dust removal, desulfurization, and denitrification is discharged through a chimney, thus achieving dust removal, desulfurization, and denitrification of the flue gas.

[0016] 3. Under the action of the spring, the sealing plate moves to the opening of the storage box, ensuring that the storage box forms a good sealed environment after the cleaning brush is removed from the storage box, preventing dust from entering the storage box and contaminating the cleaning brush.

[0017] 4. The cleaning brush is equipped with a vibration motor inside, which can start high-frequency vibration during the reset process to shake off the dust attached to its surface and further improve the cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a dust removal, desulfurization, and denitrification equipment according to the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the present invention.

[0021] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0022] Figure 5 This is an enlarged structural diagram of point B in this utility model;

[0023] Figure 6 This is a schematic diagram of the desulfurization unit structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the denitrification unit structure of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 100, buffer tank; 200, dust collection box; 201, filter screen; 202, electric telescopic rod; 203, mounting plate; 204, fixing plate; 205, cleaning brush; 206, storage box; 300, vibration motor; 400, sealing plate; 401, spring; 500, denitrification tower; 501, demister; 502, spray layer; 503, flue; 504, ammonia injection grid; 505, SCR reactor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-7 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0027] This embodiment provides a dust removal, desulfurization, and denitrification device, such as... Figure 1-5 The system includes a dust removal unit, a desulfurization unit, and a denitrification unit for treating flue gas. The dust removal unit includes a buffer tank 100, with a dust collection box 200 located outside the outlet end of the buffer tank. The inlet end of the buffer tank is located slightly below the middle of the tank body to prevent accumulated dust at the bottom of the tank from being blown up again. A cover plate is threaded to the bottom of the buffer tank. The inlet end of the dust collection box is connected to the outlet end of the buffer tank, the outlet end of the dust collection box is connected to the inlet end of the desulfurization unit, and the inlet end of the buffer tank is connected to the outlet end of the denitrification unit. A filter screen 201 is installed inside the dust collection box, and an electric telescopic rod 202 is installed on the box wall. The telescopic end of the electric telescopic rod is located in the inner cavity of the dust collection box and is equipped with a cleaning component. The cleaning component includes a mounting plate 203 set at the telescopic end of the electric telescopic rod 202. The two ends of the mounting plate are provided with symmetrically distributed fixing plates 204. The outer side of the fixing plates is provided with cleaning brushes 205. The cleaning brushes contact the filter surfaces of the adjacent filter screens on the same side. The cleaning component also includes a storage box 206 symmetrically arranged on the outer wall of the inner cavity of the buffer tank. The side of the storage box 206 near the buffer tank is open. The storage box is movably inserted into the cleaning brushes on the same side. The opening of the storage box corresponds to the adjacent fixing plate on the same side.

[0028] The flue gas first enters the dust collector 200, where particulate matter is initially filtered by filters 201 located at both ends of the inner cavity. The dust-removed flue gas then enters the desulfurization and denitrification units for desulfurization and denitrification, thus achieving dust removal, desulfurization, and denitrification of the flue gas. With prolonged operation, the electric telescopic rod 202 is activated, its telescopic end driving the cleaning brushes 205 on the mounting plate 203 and the fixed plate 204 to move synchronously, thereby cleaning the filter surface of the filters 201 to restore filtration efficiency. After cleaning... The electric telescopic rod 202 drives the cleaning brush 205 on the fixing plate 204 to reset. Finally, the cleaning brush 205 is inserted into the storage box 206. The mounting plate 203 and the opening of the storage box 206 are sealed to achieve storage protection and prevent it from losing its cleaning ability due to long-term exposure to the dusty environment. This improves the overall performance and service life of the equipment. In addition, the cleaning brush 205 has a built-in vibration motor 300, which can perform high-frequency vibration when the cleaning brush 205 is reset, thereby shaking off the dust on the cleaning brush 205 to ensure the cleaning effect of the cleaning brush 205.

[0029] like Figure 3-5 As shown, each cleaning brush is equipped with a vibration motor 300, which can perform high-frequency vibration when the cleaning brush 205 is reset, thereby shaking off the dust on the cleaning brush 205 to ensure the cleaning effect of the cleaning brush 205.

[0030] like Figure 2-5 As shown, it also includes a sealing assembly, which includes a sealing plate 400 that is slidably connected to the storage box. The sealing assembly also includes springs 401 that are symmetrically arranged at both ends of the outer side of the sealing plate. The outer ends of the springs are fixedly connected to the grooves corresponding to the inner side of the dust collector. The storage box is provided with openings that are compatible with the springs.

[0031] Under the elastic force of the spring 401, the sealing plate 401 moves to the opening of the storage box 206, so that after the cleaning brush 205 is removed from the storage box 206, the storage box 206 forms a good sealing environment to prevent dust from entering the storage box 206 and contaminating the cleaning brush 205. After cleaning is completed, the electric telescopic rod 202 drives the cleaning brush 205 on the fixing plate 204 to reset. During the reset process, the cleaning brush 205 pushes the sealing plate 401 to overcome the elastic force of the spring 401 and retracts.

[0032] like Figure 6-7 As shown, the desulfurization unit includes a desulfurization tower 500, the outlet of which is connected to the inlet of a buffer tank via a pipe. A demister 501 is provided at the top of the inner cavity of the desulfurization tower 500, and a spray layer 502 is provided above the inlet of the desulfurization tower 500. The denitrification unit includes a flue 503, the inlet of which is connected to the outlet of the desulfurization tower 503 via a pipe. An ammonia injection grid 504 is provided inside the flue, and an SCR reactor 505 is provided below the ammonia injection grid inside the flue.

[0033] Dust removal, desulfurization, and denitrification include the following steps:

[0034] S1: Flue gas enters flue 503, and ammonia or urea solution is injected into flue 503 as a reducing agent through ammonia injection grille 504. The airflow distribution is optimized by a static mixer to make the reducing agent and NOx in the flue gas mix evenly.

[0035] S2: The mixed flue gas is fed into the SCR reactor 505, where a reduction reaction is carried out in the temperature range of 280–420℃ under the action of the catalyst module: V□O□-WO□ / TiO2 substrate, converting NOx into N2 and H□O;

[0036] S3: The denitrified flue gas is introduced into the buffer tank 100. The heavier particles in the flue gas naturally fall to the bottom of the buffer tank 100, while the lighter particles enter the dust collector 200 with the flue gas and are filtered by the filter screen 201.

[0037] S4: The flue gas after dust removal enters the desulfurization tower bottom 500, and at the same time, limestone powder is mixed with water to prepare slurry, which is then transported to the slurry zone of the desulfurization tower bottom 500.

[0038] S5: Limestone slurry is sprayed downward through the spray layer 502, so that the slurry can fully contact the flue gas flowing upward, absorb SO2 in the flue gas, and generate slurry containing calcium sulfite.

[0039] S6: The slurry in the desulfurization tower bottom 500 is transported to the spray layer 502 for recycling via a circulation pump. At the same time, oxidizing air is blown into the desulfurization tower bottom 500 to oxidize calcium sulfite into calcium sulfate.

[0040] S7: The desulfurized flue gas passes through the demister 501 at the top of the desulfurization tower 500 to remove liquid droplets, resulting in purified flue gas;

[0041] S8: After the slurry in the bottom of the tower is concentrated by a hydrocyclone, it is dehydrated by a vacuum belt filter to produce gypsum with a moisture content of <10%.

[0042] S9: The clean flue gas after dust removal, desulfurization and denitrification is discharged through the chimney.

[0043] The working principle of the dust removal, desulfurization, and denitrification equipment provided by this utility model is as follows: Flue gas enters the flue 503, and ammonia or urea solution is injected into the flue 503 as a reducing agent through the ammonia injection grid 504. The airflow distribution is optimized by a static mixer to ensure that the reducing agent and NOx in the flue gas are evenly mixed. The mixed flue gas is then introduced into the SCR reactor 505, where a reduction reaction is carried out in the temperature range of 280–420℃ under the action of the catalyst module: V□O□-WO□ / TiO2 substrate, converting NOx into N2 and H□O. The denitrified flue gas is then introduced into the buffer tank 100, where heavier particles naturally fall to the bottom of the buffer tank 100, while lighter particles enter the dust collector along with the flue gas. Inside the chamber 200, particulate matter in the flue gas is filtered through a filter screen 201. The dust-removed flue gas enters the desulfurization tower 500. Simultaneously, limestone powder is mixed with water to prepare a slurry, which is then transported to the slurry zone of the desulfurization tower 500. The limestone slurry is sprayed downwards through the spray layer 502, ensuring full contact between the slurry and the counter-current flue gas. This slurry absorbs SO2 from the flue gas, generating a slurry containing calcium sulfite. The slurry in the desulfurization tower 500 is then pumped back to the spray layer 502 for recycling. Simultaneously, oxidizing air is blown into the desulfurization tower 500 to oxidize the calcium sulfite to calcium sulfate. The desulfurized flue gas passes through a demister 501 at the top of the desulfurization tower 500 to remove droplets, resulting in purified flue gas. The tower 500 is then... After the slurry is concentrated by a hydrocyclone, it is dewatered by a vacuum belt filter to produce gypsum with a moisture content of <10%. The clean flue gas after dust removal, desulfurization, and denitrification is discharged through a chimney, thus achieving dust removal, desulfurization, and denitrification of the flue gas. As the equipment operates for a long time, the electric telescopic rod 202 is activated, and its telescopic end drives the cleaning brush 205 on the mounting plate 203 and the fixed plate 204 to move synchronously, thereby cleaning the filter surface of the filter screen 201 to restore filtration efficiency. At the same time, the sealing plate 401 moves to the opening of the storage box 206 under the elastic force of the spring 401, so that the cleaning brush 205 is removed from the storage box 206, ensuring that the storage box 206 forms a good sealing environment and preventing dust from entering. The cleaning brush 205 is installed inside the storage box 206. The mounting plate 203 and the opening of the storage box 206 are sealed. After cleaning, the electric telescopic rod 202 drives the cleaning brush 205 on the fixing plate 204 to reset. During the reset process, the cleaning brush 205 pushes the sealing plate 401 to overcome the elastic force of the spring 401 and retracts. Finally, the cleaning brush 205 is inserted into the storage box 206 to achieve storage protection and prevent it from losing its cleaning ability due to long-term exposure to the dusty environment. This improves the overall performance and service life of the equipment. In addition, the cleaning brush 205 has a built-in vibration motor 300, which can perform high-frequency vibration when the cleaning brush 205 is reset, thereby shaking off the dust on the cleaning brush 205 to ensure the cleaning effect of the cleaning brush 205.

[0044] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A dust removal, desulfurization, and denitrification device, characterized in that: The system includes a dust removal unit, a desulfurization unit, and a denitrification unit for treating flue gas. The dust removal unit includes a buffer tank (100), and a dust collection box (200) is provided on the outside of the outlet end of the buffer tank. The bottom of the buffer tank is threaded with a cover plate. The inlet end of the dust collection box is connected to the outlet end of the buffer tank. The outlet end of the dust collection box is connected to the inlet end of the desulfurization unit. The inlet end of the buffer tank is connected to the outlet end of the denitrification unit. The inner cavity of the dust collection box is provided with a filter screen (201). An electric telescopic rod (202) is installed on the wall of the dust collection box. The telescopic end of the electric telescopic rod is provided with a cleaning component located in the inner cavity of the dust collection box.

2. The dust removal, desulfurization, and denitrification equipment as described in claim 1, characterized in that: The cleaning assembly includes a mounting plate (203) disposed at the telescopic end of the electric telescopic rod (202). The mounting plate has symmetrically distributed fixing plates (204) at both ends. Each fixing plate has a cleaning brush (205) on its outer side. The cleaning brush contacts the filter surface of the filter screen adjacent to it on the same side.

3. The dust removal, desulfurization, and denitrification equipment as described in claim 2, characterized in that: The cleaning assembly also includes a storage box (206) symmetrically arranged on the outer wall of the inner cavity of the buffer tank. The side of the storage box (206) near the buffer tank is open. The storage box is movably connected to the cleaning brushes adjacent to it on the same side. The openings of the storage boxes correspond to the fixing plates adjacent to them on the same side.

4. The dust removal, desulfurization, and denitrification equipment as described in claim 2, characterized in that: Each cleaning brush is equipped with a vibration motor (300).

5. The dust removal, desulfurization, and denitrification equipment as described in claim 3, characterized in that: It also includes a sealing assembly, which includes sealing plates (400) that are slidably connected within the storage box.

6. The dust removal, desulfurization, and denitrification equipment as described in claim 5, characterized in that: The sealing assembly also includes springs (401) symmetrically arranged at both ends of the outer side of the sealing plate. The outer ends of the springs are fixedly connected to the grooves corresponding to the inner side of the dust collector. The storage box is provided with openings that match the springs.

7. The dust removal, desulfurization, and denitrification equipment as described in claim 1, characterized in that: The desulfurization unit includes a desulfurization tower (500), the inlet of which is connected to the outlet of a buffer tank via a connecting pipe. A demister (501) is provided at the top of the inner cavity of the desulfurization tower (500), and a spray layer (502) is provided above the inlet of the desulfurization tower (500).

8. The dust removal, desulfurization, and denitrification equipment as described in claim 1, characterized in that: The denitrification unit includes a flue (503), the outlet of which is connected to the inlet of a buffer tank via a pipe. The inner cavity of the flue is provided with an ammonia injection grid (504), and an SCR reactor (505) is provided in the inner cavity of the flue below the ammonia injection grid.

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