Cement kiln flue gas denitration device
By introducing a refrigeration plate, a first flow guide fan, an activated carbon filter plate and a sealing plate into the cement kiln flue gas denitrification device, the problem of the device lacking flue gas cooling and impurity cleaning functions is solved, and the safety reduction of flue gas temperature and convenient cleaning of impurities is achieved, and the denitrification effect and personal safety are improved.
Patent Information
- Application Number
- CN202421872405.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The existing cement kiln flue gas denitrification devices lack the function of cooling the flue gas and facilitating impurities cleaning, which leads to excessive flue gas temperature and may burn people, and the accumulation of impurities will lead to blockage, affecting the denitrification effect and personal safety.
A cement kiln flue gas denitrification device is designed, including a refrigeration plate, a first flow guide fan, an activated carbon filter plate and a sealing plate. The refrigeration plate generates air conditioning, and the first diversion fan mixes the air conditioning, ammonia gas reducing agent and flue gas to cool down; the activated carbon filter plate filters the impurities in the flue gas; and the sealing plate allows personnel to easily clean up the impurities on the activated carbon filter plate.
The cooling of flue gas is achieved, ensuring the temperature safety of flue gas during the denitrification process. Through the convenient impurity cleaning function, the blockage problems caused by impurities accumulation are avoided, and the denitrification effect and personal safety are improved.
Smart Images
Figure CN222900576U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical or biological purification of waste gas, and particularly relates to a denitration device for cement kiln flue gas. Background Art
[0002] A kiln is a device made of refractory materials for firing products and is an essential facility in pottery forming. Over tens of thousands of years of ceramic firing history by humans, rich kiln-building styles and experiences have been accumulated. From the open-air heap firing on the ground and pit building firing in primitive society to the steamed bun-shaped updraft round kiln, semi-inverted flame horseshoe kiln, Banpo dragon kiln, duck egg-shaped kiln, and then to the current indoor gas kiln and electric kiln, kiln technology has been continuously improved and developed. The cement kiln is also one of the most common kilns.
[0003] Common cement kiln flue gas denitration devices only include the function of flue gas denitration, which can carry out denitration operations on flue gas, but lack the functions of cooling the flue gas and facilitating impurity cleaning. They cannot ensure that impurities are cleaned after the flue gas is filtered and cannot ensure that the temperature is not too high to scald people. It is easy to occur that the temperature of the flue gas is too high during denitration, resulting in scalding people when discharging, and a large amount of impurities accumulate on the sieve plate after the flue gas is filtered, causing blockage, affecting the denitration effect and personal safety.
[0004] Therefore, aiming at the problems that the above-mentioned cement kiln flue gas denitration device lacks the functions of cooling the flue gas and facilitating impurity cleaning, cannot ensure that impurities are cleaned after the flue gas is filtered, and cannot ensure that the temperature is not too high to scald people, it is urgently needed to be solved to improve the use scenario of the cement kiln flue gas denitration device. Content of the Utility Model
[0005] In order to overcome the problems of common cement kiln flue gas denitration devices, which lack the functions of cooling the flue gas and facilitating impurity cleaning, cannot ensure that impurities are cleaned after the flue gas is filtered, and cannot ensure that the temperature is not too high to scald people, it is easy to occur that the temperature of the flue gas is too high during denitration, resulting in scalding people when discharging, and a large amount of impurities accumulate on the sieve plate after the flue gas is filtered, causing blockage, affecting the denitration effect and personal safety.
[0006] The technical solution of the utility model is as follows: A cement kiln flue gas denitration device includes a denitration box body. A maintenance door is arranged on the first side surface of the denitration box body. A sealing top plate is arranged on the top of the denitration box body. Four connecting rods are welded at the bottom of the sealing top plate in a rectangular shape. A refrigerating plate is arranged at the bottom end of the connecting rod. A number of first guide fans are arranged at equal intervals below the refrigerating plate. Three smoke inlets are arranged at equal intervals on the second side surface of the denitration box body. A sieve opening is opened below the smoke inlet. Two support bars are symmetrically welded on the inner side surfaces of both sides of the denitration box body corresponding to the sieve opening. A sealing plate is arranged inside the sieve opening. An activated carbon filter plate is arranged on the side surface of the sealing plate corresponding to the support bar.
[0007] Preferably, by setting a refrigeration plate to generate cold air, the first guiding fan blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. By setting a sealing plate, when personnel need to clean impurities, they only need to pull out the activated carbon filter plate from the denitration box body through the handle, so as to solve the problem of the common cement kiln flue gas denitration device, which only includes the flue gas denitration function, can carry out denitration operation on the flue gas, but lacks the functions of cooling the flue gas and facilitating impurity cleaning, cannot ensure that the impurities in the flue gas are cleaned after filtration, and cannot ensure that the temperature is too high and will not scald personnel. It is easy to occur that the temperature of the flue gas is too high during the denitration process and scalds personnel when discharging, and a large amount of impurities accumulate on the sieve plate after the flue gas is filtered, causing blockage, affecting the denitration effect and personal safety.
[0008] Preferably, a holding groove is provided on the side of the maintenance door. The maintenance door is movably connected to the denitration box body through a hinge. Opening the maintenance door can repair and maintain the components in the denitration box body.
[0009] Preferably, on the other inner side of the denitration box body corresponding to the position of the smoke inlet, a hollow plate is provided. A number of gas connection pipes are arranged at equal intervals on the side of the hollow plate. One end of the gas connection pipe penetrates through the denitration box body and is placed outside it. A number of jet heads are arranged at equal intervals on the other side of the hollow plate. Before the denitration operation, the operator connects the air pipe of the ammonia evaporator to the gas connection pipe. When the flue gas enters the inside of the denitration box body through the smoke inlet, the ammonia evaporator transports the ammonia gas reducing agent to the inside of the hollow plate through the gas connection pipe and then sprays it out through the jet heads, so that the ammonia gas reducing agent reacts with the flue gas.
[0010] Preferably, the activated carbon filter plate is placed above the support bar. A sealing ring is sleeved around the sealing plate. A handle is provided on the other side of the sealing plate. When the flue gas moves downward, it passes through the activated carbon filter plate. The activated carbon filter plate filters the impurities in the flue gas. After the flue gas filtration is completed, it continues to move downward. When personnel need to clean the activated carbon filter plate, they only need to pull out the activated carbon filter plate from the denitration box body through the handle to clean the impurities on its surface.
[0011] Preferably, a number of second guiding fans are provided at the bottom side of the inside of the denitration box body. When the flue gas reaches the bottom of the inside of the denitration box body, the second guiding fans blow the flue gas towards the smoke outlet.
[0012] Preferably, a smoke outlet is provided at the bottom of the third side of the denitration box body corresponding to the position of the second guiding fan. The flue gas enters the connecting frame through the smoke outlet, and the flue gas entering the connecting frame continues to move towards the N-shaped smoke exhaust frame.
[0013] Preferably, a connection frame is welded at the position of the bottom of the third side of the denitration box corresponding to the smoke outlet, and an N-shaped smoke exhaust frame is welded to the side of the connection frame. The flue gas is discharged from the opening of the N-shaped smoke exhaust frame. The extension of the N-shaped smoke exhaust frame increases the discharge time of the flue gas, so that the flue gas has enough time to react with the ammonia gas reducing agent.
[0014] Advantages of the present utility model:
[0015] 1. By setting a refrigeration plate to generate cold air, the first diversion fan blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. By setting a sealing plate, when personnel need to clean impurities, they only need to pull out the activated carbon filter plate from the denitration box through the handle, so as to solve the problem that the common cement kiln flue gas denitration device only includes the flue gas denitration function, can carry out denitration operation on the flue gas, but lacks the functions of cooling the flue gas and facilitating impurity cleaning, and cannot ensure that the impurities are cleaned after the flue gas is filtered and cannot ensure that the temperature is too high and will not scald personnel. It is easy to occur that the temperature of the flue gas is too high during denitration and scalds personnel when discharging, and a large amount of impurities accumulate on the sieve plate after the flue gas is filtered, causing blockage, affecting the denitration effect and personal safety.
[0016] 2. When the flue gas moves downward, it passes through the activated carbon filter plate, and the activated carbon filter plate filters the impurities in the flue gas. After the flue gas filtration is completed, it continues to move downward. When personnel need to clean the activated carbon filter plate, they only need to pull out the activated carbon filter plate from the denitration box through the handle to clean the impurities on its surface, realizing the function of facilitating impurity cleaning.
[0017] 3. The refrigeration plate generates cold air, and the first diversion fan blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas, realizing the function of cooling the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a three-dimensional structural schematic diagram of the cement kiln flue gas denitration device of the present utility model;
[0019] Figure 2 Shown is a three-dimensional exploded structural schematic diagram of the cement kiln flue gas denitration device of the present utility model;
[0020] Figure 3 Shown is a three-dimensional sectional structural schematic diagram of the denitration box of the cement kiln flue gas denitration device of the present utility model;
[0021] Figure 4 Shown is a three-dimensional structural schematic diagram of the N-shaped smoke exhaust frame of the cement kiln flue gas denitration device of the present utility model.
[0022] In the figure: 1, denitration box body; 2, maintenance door; 3, holding groove; 4, sealing top plate; 5, connecting rod; 6, refrigeration plate; 7, first diversion fan; 8, hollow plate; 9, gas connecting pipe; 10, jet head; 11, smoke inlet; 12, screening opening; 13, support bar; 14, sealing plate; 15, sealing ring; 16, handle; 17, activated carbon filter plate; 18, second diversion fan; 19, smoke outlet; 20, connecting frame; 21, N-shaped smoke exhaust frame. Detailed implementation mode
[0023] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] Please refer to Figures 1-4 , the present utility model provides an embodiment: a cement kiln flue gas denitration device, including a denitration box body 1, a maintenance door 2 is arranged on the first side surface of the denitration box body 1, a sealing top plate 4 is arranged on the top of the denitration box body 1, four connecting rods 5 are welded at the bottom of the sealing top plate 4 in a rectangular shape, a refrigeration plate 6 is arranged at the bottom end of the connecting rod 5, and a plurality of first diversion fans 7 are arranged at equal intervals below the refrigeration plate 6. Three smoke inlets 11 are arranged at equal intervals on the second side surface of the denitration box body 1, a screening opening 12 is opened below the smoke inlet 11, two support bars 13 are symmetrically welded on the inner side surfaces of both sides of the denitration box body 1 corresponding to the position of the screening opening 12, a sealing plate 14 is arranged inside the screening opening 12, and an activated carbon filter plate 17 is arranged on the side surface of the sealing plate 14 corresponding to the position of the support bar 13.
[0025] Please refer to Figures 1-4 , in this embodiment, a holding groove 3 is opened on the side surface of the maintenance door 2, the maintenance door 2 is movably connected to the denitration box body 1 through a hinge, the refrigeration plate 6 generates cold air, and the first diversion fan 7 blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. When the flue gas moves downward, it passes through the activated carbon filter plate 17, and the activated carbon filter plate 17 filters the impurities in the flue gas. After the flue gas filtration is completed, it continues to move downward. When the personnel need to clean the activated carbon filter plate 17, they only need to pull out the activated carbon filter plate 17 from the denitration box body 1 through the handle 16 to clean the impurities on its surface, completing the work of facilitating impurity cleaning and cooling the flue gas.
[0026] Please refer to Figures 1-4, in this embodiment, a hollow plate 8 is arranged at the position corresponding to the smoke inlet 11 on the other inner side surface of the denitration box body 1. A number of gas connecting pipes 9 are arranged at equal intervals on the side surface of the hollow plate 8. One end of the gas connecting pipe 9 penetrates through the denitration box body 1 and is placed outside it. A number of jet heads 10 are arranged at equal intervals on the other side surface of the hollow plate 8. The activated carbon filter plate 17 is placed above the support strip 13. A sealing ring 15 is sleeved around the sealing plate 14. A handle 16 is arranged on the other side surface of the sealing plate 14. A number of second diversion fans 18 are arranged at the bottom side of the inner part of the denitration box body 1. A smoke exhaust port 19 is opened at the position corresponding to the second diversion fans 18 at the bottom of the third side surface of the denitration box body 1. A connecting frame 20 is welded at the position corresponding to the smoke exhaust port 19 at the bottom of the third side surface of the denitration box body 1. An N-shaped smoke exhaust frame 21 is welded on the side of the connecting frame 20. The refrigeration plate 6 generates cold air. The first diversion fan 7 blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. When the flue gas moves downward, it passes through the activated carbon filter plate 17, and the activated carbon filter plate 17 filters the impurities in the flue gas. After the flue gas filtration is completed, it continues to move downward. When the personnel need to clean the activated carbon filter plate 17, they only need to pull out the activated carbon filter plate 17 from the denitration box body 1 through the handle 16 to clean the impurities on its surface, realizing the functions of facilitating impurity cleaning and cooling the flue gas, preventing the problem that the temperature of the flue gas is too high during denitration, causing burns to personnel when discharging, and a large amount of impurities accumulate on the sieve plate after flue gas filtration, resulting in blockage, affecting the denitration effect and personal safety.
[0027] When working, the personnel connect the smoke exhaust pipe of the cement kiln to the smoke inlet 11, and then connect the gas pipe of the ammonia evaporator to the gas connection pipe 9. The flue gas enters the denitration box body 1 through the smoke inlet 11. The ammonia evaporator transports the ammonia gas reducing agent to the inside of the hollow plate 8 through the gas connection pipe 9, and then sprays it out through the jet head 10, so that the ammonia gas reducing agent reacts with the flue gas. At the same time, the refrigeration plate 6 generates cold air, and the first guide fan 7 blows the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. When the flue gas moves downward, it passes through the activated carbon filter plate 17, and the activated carbon filter plate 17 filters the impurities in the flue gas. After the flue gas filtration is completed, it continues to move downward. When the flue gas reaches the bottom end of the denitration box body 1, the second guide fan 18 blows the flue gas toward the smoke outlet 19. The flue gas enters the connection frame 20 through the smoke outlet 19, and the flue gas entering the connection frame 20 continues to move toward the N-shaped smoke exhaust frame 21. The flue gas is discharged from the opening of the N-shaped smoke exhaust frame 21. The extension of the N-shaped smoke exhaust frame 21 increases the time for the flue gas to be discharged, so that the flue gas can have enough time to react with the ammonia gas reducing agent. When the personnel need to clean the activated carbon filter plate 17, they only need to pull out the activated carbon filter plate 17 from the denitration box body 1 through the handle 16 to clean the impurities on its surface, realizing the functions of facilitating impurity cleaning and cooling the flue gas.
[0028] Through the above steps, by setting the refrigeration plate 6 to generate cold air, and the first guide fan 7 blowing the cold air, ammonia gas reducing agent and flue gas downward together, so that the three are mixed, thereby cooling the flue gas. By setting the sealing plate 14, when the personnel need to clean the impurities, they only need to pull out the activated carbon filter plate 17 from the denitration box body 1 through the handle 16, so as to solve the problems of the common cement kiln flue gas denitration device, which only includes the flue gas denitration function and can carry out denitration operation on the flue gas, but lacks the functions of cooling the flue gas and facilitating impurity cleaning, cannot ensure that the impurities are cleaned after the flue gas is filtered, and cannot ensure that the temperature is too high and will not scald the personnel. It is easy to occur that the temperature of the flue gas is too high during the denitration process and scalds the personnel when discharging, and a large amount of impurities accumulate on the sieve plate after the flue gas is filtered, causing blockage, affecting the denitration effect and personal safety.
[0029] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those skilled in the art.
Claims
1. A cement kiln flue gas denitrification device, comprising a denitrification box (1), characterized in that: A maintenance door (2) is arranged on the first side of the denitration box (1), a sealing top plate (4) is arranged on the top of the denitration box (1), the bottom of the sealing top plate (4) is rectangular and has four connecting rods (5) welded thereto, a cooling plate (6) is arranged at the bottom end of the connecting rod (5), a plurality of first guide fans (7) are arranged at equal intervals below the cooling plate (6), three smoke inlets (11) are arranged at equal intervals on the second side of the denitration box (1), a sieve opening (12) is provided below the smoke inlet (11), two support bars (13) are symmetrically welded on both sides of the interior of the denitration box (1) at positions corresponding to the sieve openings (12), a sealing plate (14) is arranged on the inner side of the sieve opening (12), and an activated carbon filter plate (17) is arranged on the side of the sealing plate (14) at positions corresponding to the support bars (13).
2. The cement kiln flue gas denitrification device according to claim 1, characterized in that: A grip groove (3) is provided on the side of the maintenance door (2), and the maintenance door (2) is movably connected to the denitration box (1) via a hinge.
3. The cement kiln flue gas denitrification device according to claim 1, characterized in that: A hollow plate (8) is arranged at a position corresponding to the smoke inlet (11) on the other side of the interior of the denitration box (1), and a plurality of gas connection pipes (9) are arranged at equal intervals on the side of the hollow plate (8), one end of the gas connection pipe (9) passes through the denitration box (1) and is placed outside the denitration box, and a plurality of injection heads (10) are arranged at equal intervals on the other side of the hollow plate (8).
4. The cement kiln flue gas denitrification device according to claim 1, characterized in that: The activated carbon filter plate (17) is placed above the support bar (13), a sealing ring (15) is sleeved around the sealing plate (14), and a handle (16) is arranged on the other side of the sealing plate (14).
5. The cement kiln flue gas denitrification device according to claim 1, characterized in that: A plurality of second guide fans (18) are arranged on the bottom side of the denitration box (1).
6. The cement kiln flue gas denitrification device according to claim 5, characterized in that: A smoke exhaust port (19) is provided at the bottom of the third side of the denitration box (1) at a position corresponding to the second guide fan (18).
7. The cement kiln flue gas denitrification device according to claim 6, characterized in that: A connection frame (20) is welded at a position corresponding to the smoke exhaust port (19) at the bottom of the third side of the denitrification box (1), and an N-shaped smoke exhaust frame (21) is welded to the side of the connection frame (20).