Cement kiln denitration device

Abstract

The utility model relates to the technical field of cement kiln denitration, and discloses a cement kiln denitration device which comprises a box body, an exhaust fan is fixedly arranged below the rear end wall of the box body, the exhaust end of the exhaust fan is communicated with the interior of a cement kiln through a pipe body, a denitration mechanism is arranged below the interior of the box body, and the exhaust end of the exhaust fan is communicated with the interior of the cement kiln through the pipe body. The flue gas denitration device comprises a box body, an exhaust fan is arranged in the box body, a sealing door is hinged to the lower portion of the right side wall of the box body, a heat recovery mechanism is arranged on the upper portion of the interior of the box body, and a smoke exhaust port is fixedly formed in the top end of the box body. Through cooperative use of a spraying plate, a spraying head, a steam engine, a gas conveying pipe, a partition plate, a first conical tooth, a rotating column, a stirring rod, a double-shaft motor, a shaft column and a second conical tooth, conveyed flue gas can be in full contact with molybdenum dioxide steam conveniently, and good gas conveying denitration treatment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement kiln denitration, in particular to a cement kiln denitration device. Background Art

[0002] During the cement production process of cement kilns, there will be some nitrogen dioxide and other substances in the flue gas discharged. The treatment of such nitrogen oxide substances is called denitrification. Denitrification refers to the removal of nitrogen oxides (NOx) in the exhaust gas, mainly including NO and NO2. It is one of the main pollutants that cause acid rain, damage the ozone layer, form photochemical smog, and cause the greenhouse effect, which seriously threatens the human living environment. NOx mainly comes from the combustion of coal. my country is the world's largest coal producer and consumer. Most of the coal is used for combustion, and the NOx emission is large. Denitrification of exhaust gas is an important step.

[0003] The existing referenceable Chinese utility model patent has a publication number of CN210729146U, which discloses a cement kiln desulfurization and denitrification device. The utility model sets up a denitrifier, and the flue gas enters the denitrifier through a connecting pipe. The steam engine is turned on, and molybdenum dioxide vapor is injected into the interior through the steam pipe to denitrify the flue gas. After denitrification, the flue gas enters the air outlet channel, and the moisture in the flue gas is filtered through a gas-liquid separator, and the flue gas falls into a collection tray through a feed pipe, and then is pulled out through a drawer for easy collection. The flue gas can enter the desulfurizer through the feed pipe, so that the flue gas circulates and reacts in the purification device, so that the reaction is thorough and the desulfurization and denitrification effects are efficient. Desulfurization is performed again to improve the desulfurization efficiency, and further filtration is performed through an activated carbon filter to make air emissions better.

[0004] When the above-mentioned cement kiln denitrification device is in use, it is unable to fully contact the kiln flue gas with molybdenum dioxide vapor for denitrification, so that the denitrification is not fully discharged to the outside and causes environmental pollution, and the heat contained in the discharged flue gas is not easy to recover, resulting in a waste of energy. Therefore, the technical personnel in this field provide a cement kiln denitrification device to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a cement kiln denitrification device, which has the advantages of sufficient denitrification and heat recovery, and solves the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement kiln denitration device, comprising: a box body, an exhaust fan is fixedly arranged below the rear end wall of the box body, the exhaust end of the exhaust fan is connected with the inside of the cement kiln through a pipe body, a denitration mechanism is arranged below the inside of the box body, a sealing door is hinged below the right side wall of the box body, a heat recovery mechanism is arranged above the inside of the box body, and a smoke exhaust port is fixedly arranged at the top of the box body;

[0009] The denitrification mechanism includes: a spray plate is arranged inside the box, a group of nozzles is fixedly arranged on the bottom end of the spray plate, a steam engine is fixedly arranged on the left side wall of the box, a gas delivery pipe is fixedly arranged on the gas delivery end of the steam engine, a partition is fixedly arranged at the lower part of the inside of the box, first conical teeth are rotatably connected to both sides of the inner bottom end of the box through bearings, rotating columns are fixedly arranged on the tops of the two first conical teeth, one ends of the two rotating columns pass through the top of the partition and a group of stirring rods are fixedly arranged on the outer surface thereof, a double-axis motor is fixedly arranged in the middle of the inner bottom end of the box, both output ends of the double-axis motor are fixedly connected to shaft columns, and one end of the two shaft columns is fixedly arranged with second conical teeth.

[0010] As a preferred technical solution of the utility model, one end of the air delivery pipe is connected to the spray plate.

[0011] As a preferred technical solution of the present utility model, the two first conical teeth are meshedly connected with the two second conical teeth.

[0012] As a preferred technical solution of the utility model, the heat recovery mechanism includes: a water tank is fixedly arranged on the upper part of the interior of the box body, a water inlet pipe is fixedly arranged on the right side of the top end of the water tank, a water outlet pipe is fixedly arranged on the right side of the water tank, the water inlet pipe and the water outlet pipe both extend to the outside of the box body, a through opening is opened in the middle of the water tank from top to bottom, a filter is fixedly arranged in the middle of the bottom end of the water tank, a group of circular plates are fixedly arranged inside the through opening, and air holes are opened on the group of circular plates.

[0013] As a preferred technical solution of the utility model, the spray plate is fixedly arranged on the outer side of the bottom end of the water tank.

[0014] As a preferred technical solution of the utility model, a group of air holes on the circular plate are staggered.

[0015] Compared with the prior art, the utility model provides a cement kiln denitrification device, which has the following beneficial effects:

[0016] 1. The utility model is provided with a denitration mechanism. When in use, the exhaust fan is turned on to transport the flue gas in the cement kiln to the inside of the box. The nozzle, the steam engine, the gas pipe, the partition, the first conical teeth, the rotating column, the stirring rod, the double-axis motor, the shaft column and the second conical teeth are used in coordination to facilitate the transported flue gas to fully contact with the molybdenum dioxide vapor, so as to perform better denitration treatment.

[0017] 2. The utility model sets a heat recovery mechanism. When in use, through the coordinated use of the water tank, the water inlet pipe, the water outlet pipe, the through-hole, the filter screen, the circular plate and the air hole, the speed of smoke circulation can be slowed down, the water in the water tank can be heated, the heat can be better recovered and utilized, and the energy-saving effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure inside the box of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the first conical tooth and the second conical tooth connected to each other in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the connection between the water tank and the through port of the utility model.

[0022] Among them: 1. Box body; 2. Exhaust fan; 3. Denitrification mechanism; 301. Spray plate; 302. Spray head; 303. Steam engine; 304. Gas pipe; 305. Partition; 306. First conical tooth; 307. Rotating column; 308. Agitating rod; 309. Double-axis motor; 310. Shaft column; 311. Second conical tooth; 4. Sealing door; 5. Heat recovery mechanism; 501. Water tank; 502. Water inlet pipe; 503. Water outlet pipe; 504. Through port; 505. Filter; 506. Round plate; 507. Air hole; 6. Smoke exhaust port. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-Figure 4 A cement kiln denitration device comprises: a box body 1, an exhaust fan 2 is fixedly arranged below the rear end wall of the box body 1, the exhaust end of the exhaust fan 2 is connected with the inside of the cement kiln through a pipe body, a denitration mechanism 3 is arranged below the inside of the box body 1, a sealing door 4 is hinged below the right side wall of the box body 1, a heat recovery mechanism 5 is arranged above the inside of the box body 1, and a smoke exhaust port 6 is fixedly arranged at the top of the box body 1;

[0027] The denitration mechanism 3 includes: a spray plate 301 is arranged inside the box 1, a group of spray heads 302 are fixedly arranged at the bottom of the spray plate 301, a steam engine 303 is fixedly arranged on the left wall of the box 1, a gas delivery pipe 304 is fixedly arranged at the gas delivery end of the steam engine 303, a partition 305 is fixedly arranged at the bottom of the box 1, first conical teeth 306 are rotatably connected to both sides of the bottom end of the box 1 through bearings, and rotating columns 307 are fixedly arranged at the tops of the two first conical teeth 306, and two One end of the rotating column 307 passes through the top of the partition 305, and a group of stirring rods 308 are fixedly set on the outer surface thereof. A dual-axis motor 309 is fixedly set in the middle of the inner bottom end of the box body 1, and the two output ends of the dual-axis motor 309 are fixedly connected with shaft columns 310, and one end of the two shaft columns 310 is fixedly set with second conical teeth 311; one end of the air supply pipe 304 passes through the spray plate 301; the two first conical teeth 306 are meshingly connected with the two second conical teeth 311.

[0028] Furthermore, when in use, the exhaust fan 2 is turned on to transport the flue gas in the cement kiln to the inside of the box body 1, and the steam engine 303 is turned on to transport the molybdenum dioxide vapor to the spray plate 301 through the gas pipe 304 and then sprayed out from a group of nozzles 302 to denitrify the flue gas. At the same time, the dual-axis motor 309 is started to drive the two shafts 310 to rotate, and its two second conical teeth 311 drive the two first conical teeth 306 to rotate, and the two rotating columns 307 rotate, thereby causing the two groups of stirring rods 308 to rotate, so as to facilitate the transported flue gas to fully contact with the molybdenum dioxide vapor, so as to achieve better denitrification treatment.

[0029] The heat recovery mechanism 5 includes: a water tank 501 is fixedly arranged on the upper part of the box body 1, a water inlet pipe 502 is fixedly arranged on the right side of the top of the water tank 501, and a water outlet pipe 503 is fixedly arranged on the right side of the water tank 501, and the water inlet pipe 502 and the water outlet pipe 503 are both extended to the outside of the box body 1, a through opening 504 is opened in the middle of the water tank 501 from top to bottom, a filter screen 505 is fixedly arranged in the middle of the bottom end of the water tank 501, a group of circular plates 506 are fixedly arranged inside the through opening 504, and air holes 507 are opened on the group of circular plates 506; the spray plate 301 is fixedly arranged on the outer side of the bottom end of the water tank 501; the air holes 507 on the group of circular plates 506 are staggered.

[0030] Furthermore, water is added to the interior of the water tank 501 through the water inlet pipe 502, and the impurities in the flue gas after denitrification can be filtered through the filter 505 to avoid polluting the environment. The flue gas after denitrification flows through the opening 504 and is discharged from the smoke exhaust port 6. When passing through the smoke exhaust port 6, a group of circular plates 506 and air holes 507 cooperate to slow down the speed of smoke circulation, heat the water in the water tank 501, and better recycle and utilize the heat, thereby achieving an energy-saving effect. When using hot water, just open the valve body on the water outlet pipe 503.

[0031] Working principle: When in use, turn on the exhaust fan 2 to transport the flue gas in the cement kiln to the inside of the box 1, and turn on the steam engine 303 to transport the molybdenum dioxide vapor through the gas pipe 304 to the spray plate 301 and then spray out from a group of nozzles 302 to denitrate the flue gas. At the same time, start the double-axis motor 309 to drive the two shafts 310 to rotate, and the two second conical teeth 311 drive the two first conical teeth 306 to rotate, and the two rotating columns 307 rotate, so that the two groups of stirring rods 308 rotate, so as to facilitate the transported flue gas to fully contact with the molybdenum dioxide vapor, so that it is better denitrated. Water is added to the interior of the water tank 501 through the water inlet pipe 502. The flue gas after denitrification can filter out impurities in the flue gas through the filter 505 to avoid polluting the environment. The filtered impurities fall on the bottom end of the inner part of the box body 1 and can be taken out by opening the sealing door 4. The flue gas after denitrification flows through the through port 504 and is discharged from the smoke exhaust port 6. When passing through the smoke exhaust port 6, a group of circular plates 506 and air holes 507 cooperate to slow down the speed of smoke circulation, heat the water in the water tank 501, better recycle and utilize the heat, and achieve energy-saving effect. When using hot water, just open the valve body on the water outlet pipe 503.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cement kiln denitrification device, comprising: The box (1) is characterized in that: an exhaust fan (2) is fixedly arranged below the rear end wall of the box (1), the exhaust end of the exhaust fan (2) is connected to the interior of the cement kiln through a pipe body, a denitrification mechanism (3) is arranged below the interior of the box (1), a sealing door (4) is hinged below the right side wall of the box (1), a heat recovery mechanism (5) is arranged above the interior of the box (1), and a smoke exhaust port (6) is fixedly arranged at the top of the box (1); The denitration mechanism (3) comprises: a spray plate (301) is arranged inside the housing (1), a group of spray heads (302) are fixedly arranged at the bottom end of the spray plate (301), a steam engine (303) is fixedly arranged on the left side wall of the housing (1), a gas transmission pipe (304) is fixedly arranged at the gas transmission end of the steam engine (303), a partition plate (305) is fixedly arranged at the bottom of the housing (1), and first conical teeth (306) are rotatably connected to both sides of the bottom end of the housing (1) via bearings. , a rotating column (307) is fixedly provided at the top of the two first conical teeth (306), one end of the two rotating columns (307) passes through the top of the partition (305), and a group of stirring rods (308) are fixedly provided on the outer surface thereof, a dual-axis motor (309) is fixedly provided at the middle of the inner bottom end of the box body (1), and both output ends of the dual-axis motor (309) are fixedly connected to a shaft column (310), and one end of the two shaft columns (310) is fixedly provided with a second conical tooth (311).

2. A cement kiln denitrification device according to claim 1, characterized in that: One end of the gas delivery pipe (304) is connected to the spray plate (301).

3. A cement kiln denitrification device according to claim 1, characterized in that: The two first conical teeth (306) are meshingly connected with the two second conical teeth (311).

4. A cement kiln denitrification device according to claim 1, characterized in that: The heat recovery mechanism (5) comprises: a water tank (501) is fixedly arranged on the upper part of the interior of the box body (1); a water inlet pipe (502) is fixedly arranged on the right side of the top of the water tank (501); a water outlet pipe (503) is fixedly arranged on the right side of the water tank (501); the water inlet pipe (502) and the water outlet pipe (503) both extend to the outside of the box body (1); a through opening (504) is opened in the middle of the water tank (501) from top to bottom; a filter screen (505) is fixedly arranged in the middle of the bottom end of the water tank (501); a group of circular plates (506) are fixedly arranged inside the through opening (504); and each of the circular plates (506) is provided with air holes (507).

5. A cement kiln denitrification device according to claim 4, characterized in that: The spray plate (301) is fixedly arranged on the outer side of the bottom end of the water tank (501).

6. A cement kiln denitrification device according to claim 4, characterized in that: A group of air holes (507) on the circular plate (506) are arranged in a staggered manner.

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