Cement kiln desulfurization and denitrification equipment

Abstract

The utility model discloses a cement kiln desulfurization denitration equipment, including dust removal device, denitration subassembly and desulfurization subassembly, the left end of dust removal device is communicated with intake pipe, the top end of dust removal device is communicated with gas outlet pipeline, the other end of gas outlet pipeline is communicated with denitration subassembly, the desulfurization subassembly is communicated with the denitration subassembly. The right side wall of the denitration assembly is communicated with a connecting pipeline, and the other end of the connecting pipeline is communicated with a desulfurization assembly; the device comprises a box body, the upper section of the left side wall of the box body is communicated with one end of a connecting pipeline, a mixing box is arranged in an inner cavity of the box body, a stirring device is installed in the mixing box, and the bottom wall of the mixing box is communicated with a spraying device. The problems that the spraying range of lime water in the desulfurization tower is small, and meanwhile, part of gas can rapidly descend when entering the spraying position, so that the lime water cannot be fully mixed and reacted with flue gas, and the flue gas treatment effect is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, and specifically, to a desulfurization and denitration device for a cement kiln furnace. Background Art

[0002] The flue gas desulfurization and denitration technology is a boiler flue gas purification technology applied to the chemical industry with the generation of multiple nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Therefore, the application of this technology is of great benefit to the purification of ambient air. Currently known flue gas desulfurization and denitration technologies include PAFP, ACFP, pyrolusite method, electron beam ammonia method, pulse corona method, gypsum wet method, catalytic oxidation method, microbial degradation method, etc.

[0003] It is found that a cement kiln furnace flue gas desulfurization and denitration system disclosed in the publication number: CN209237693U discloses that "it includes a kiln furnace, a desulfurization tower is arranged on one side of the kiln furnace, a waste liquid collection pool is arranged at the bottom end of the desulfurization tower, the waste liquid collection pool and the desulfurization tower are connected by a pipeline, a flue gas circulation pipe is installed on the kiln furnace, a denitration cylinder is arranged between the kiln furnace and the desulfurization tower, a mixer is arranged above the denitration cylinder, a first gas guide pipe is installed on the mixer, an ammonia gas inlet pipe is arranged on one side of the first gas guide pipe, a catalyst layer is arranged inside the denitration cylinder, a second gas guide pipe is arranged at the bottom end of the denitration cylinder, a spray pipe is arranged on the desulfurization tower, and an air outlet pipe is arranged on one side of the desulfurization tower. A waste liquid collection pool and a partition board are provided. Under the action of the partition board, the flue gas is isolated on one side of the waste liquid collection pool, so as to dust the flue gas with the lime water waste liquid for desulfurization. While dusting the flue gas, the waste liquid for desulfurization is utilized, and there is no need to use other water sources or other methods for dust removal, and the cost of dust removal is lower".

[0004] However, the above-mentioned cement kiln furnace flue gas desulfurization and denitration system has the following disadvantages:

[0005] 1. When the above-mentioned flue gas desulfurization and denitration system in the patent is in use, during the desulfurization operation of the flue gas, the spraying range of the lime water in the desulfurization tower is small, and at the same time, some gases will also drop rapidly when entering the spraying area, resulting in insufficient mixing reaction between the lime water and the flue gas, affecting the flue gas treatment effect.

[0006] To solve the above problems, a desulfurization and denitration device for a cement kiln furnace is proposed in this application. Content of the Utility Model

[0007] In view of the problems in the related art, the utility model provides a desulfurization and denitration device for a cement kiln furnace, which can fully mix and react the lime water with the flue gas during the desulfurization operation, thereby improving the flue gas treatment effect.

[0008] To this end, the specific technical solutions adopted by the utility model are as follows:

[0009] A cement kiln desulfurization and denitrification device, comprising a dust removal device, a denitrification component and a desulfurization component, wherein the left end of the dust removal device is connected to an air inlet pipe, the top end of the dust removal device is connected to an air outlet pipe, the other end of the air outlet pipe is connected to the denitrification component, the right side wall of the denitrification component is connected to a connecting pipe, and the other end of the connecting pipe is connected to the desulfurization component;

[0010] The desulfurization component includes a box body, the upper section of the left side wall of the box body is connected to one end of a connecting pipe, a mixing box is opened in the inner cavity of the box body, a stirring device is installed in the mixing box, a spray device is connected on the bottom wall of the mixing box, a return pipe is connected on the top wall of the mixing box, the other end of the return pipe is connected to a spray chamber, a guide plate is installed in the spray chamber, an air inlet window is opened on the left side wall of the spray chamber, an exhaust pipe is connected on the top wall of the spray chamber, and an air outlet window is opened on the top wall of the mixing box.

[0011] As a further solution of the present invention, the stirring device includes a driving motor, which is fixedly mounted on the outside of the right side wall of the mixing box. The output end of the driving motor is connected to a rotating shaft through a reduction device, and a stirring blade is installed on the rotating shaft, and the rotating shaft is located in the inner cavity of the mixing box.

[0012] As a further solution of the utility model, the spray device includes a liquid suction pump, the liquid inlet end of the liquid suction pump is connected to the bottom wall of the mixing box, and the right side wall of the liquid outlet end of the liquid suction pump is connected to a water pipe, the other end of the water pipe passes through the right side wall of the spray chamber and extends into the spray chamber, and the bottom wall of this section of the water pipe is connected to a nozzle, a guide plate is installed below the nozzle, and a first valve is installed on the water pipe.

[0013] As a further solution of the utility model, the bottom end of the liquid outlet end of the liquid suction pump is connected to a drain pipe, and a second valve is installed on the drain pipe.

[0014] As a further solution of the utility model, support columns are fixedly installed at the four corners of the bottom end of the box.

[0015] As a further solution of the utility model, the denitrification component includes a denitrification tower, the left wall of the denitrification tower is connected to an air outlet pipe, the right wall of the denitrification tower is connected to a connecting pipe, and a catalytic reaction layer is installed in the inner cavity of the denitrification tower.

[0016] As a further solution of the utility model, an ammonia inlet pipe is connected to the top wall of the denitrification tower, and a gas nozzle is installed at the bottom end of the ammonia inlet pipe after passing through the top wall of the denitrification tower, and pillars are fixedly installed at the four corners of the bottom end of the denitrification tower.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, the dust removal device, denitration component and desulfurization component are cooperatively operated. When in use, the waste gas enters the dust removal device through the intake pipe to complete the dust removal operation, and then enters the denitration component through the outlet pipe to complete the denitration operation. Then, it enters the mixing tank through the connecting pipe. Under the action of the stirring device, it is fully mixed and reacted with the lime water in the mixing tank. Subsequently, it enters the spraying chamber through the cooperation of the air outlet window and the air inlet window. The lime water sprayed from the nozzle can perform secondary desulfurization on the flue gas again. During this process, the guide plate can divide the flue gas flow, making it contact the lime water sprayed from the nozzle more fully and achieving more thorough desulfurization. Then, the purified flue gas is discharged from the exhaust pipe. Therefore, the device can fully mix and react the lime water with the flue gas during the desulfurization operation, thereby improving the flue gas treatment effect. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the overall structural schematic diagram of a cement kiln desulfurization and denitration device according to an embodiment of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the denitration component of a cement kiln desulfurization and denitration device according to an embodiment of the present utility model;

[0022] Figure 3 is the structural schematic diagram of the desulfurization component of a cement kiln desulfurization and denitration device according to an embodiment of the present utility model;

[0023] Figure 4 is the enlarged schematic diagram of the structure at A of a cement kiln desulfurization and denitration device according to an embodiment of the present utility model;

[0024] Figure 5 is the cooperation schematic diagram of the guide plate and the nozzle of a cement kiln desulfurization and denitration device according to an embodiment of the present utility model.

[0025] In the figure:

[0026] 1. Dust removal device; 2. Denitration component; 21. Denitration tower; 22. Catalytic reaction layer; 23. Ammonia inlet pipe; 24. Jet nozzle; 25. Support pillar; 3. Desulfurization component; 4. Inlet pipe; 5. Outlet pipeline; 6. Connecting pipeline; 7. Box body; 8. Mixing box; 9. Stirring device; 91. Driving motor; 92. Rotating shaft; 93. Stirring blade; 10. Spraying device; 101. Liquid suction pump; 102. Water delivery pipe; 103. Nozzle; 104. First valve; 105. Drain pipe; 106. Second valve; 11. Return water pipe; 12. Spraying chamber; 13. Deflector; 14. Air inlet window; 15. Exhaust pipe; 16. Air outlet window; 17. Support column. Detailed implementation manners

[0027] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] According to an embodiment of the present utility model, a desulfurization and denitration device for a cement kiln is provided.

[0029] Please refer to the attached drawings of the specification Figures 1-5, according to 1. an embodiment of the utility model, a cement kiln desulfurization and denitrification equipment, comprising a dust removal device 1, a denitrification component 2 and a desulfurization component 3, characterized in that: the left end of the dust removal device 1 is connected with an air inlet pipe 4, the top of the dust removal device 1 is connected with an air outlet pipe 5, the other end of the air outlet pipe 5 is connected with the denitrification component 2, the right side wall of the denitrification component 2 is connected with a connecting pipe 6, and the other end of the connecting pipe 6 is connected with the desulfurization component 3; the desulfurization component 3 comprises a box body 7, the upper section of the left side wall of the box body 7 is connected with one end of the connecting pipe 6, a mixing box 8 is opened in the inner cavity of the box body 7, a stirring device 9 is installed in the mixing box 8, the stirring device 9 comprises a driving motor 91, the driving motor 91 is fixedly installed on the outside of the right side wall of the mixing box 8, the output end of the driving motor 91 is connected to a rotating shaft 92 through a reduction device, a stirring blade 93 is installed on the rotating shaft 92, and the rotating shaft 92 is located in the inner cavity of the mixing box 8, and the bottom wall of the mixing box 8 is connected to There is a spray device 10, the spray device 10 includes a liquid suction pump 101, the liquid inlet end of the liquid suction pump 101 is connected to the bottom wall of the mixing box 8, and the right side wall of the liquid outlet end of the liquid suction pump 101 is connected to a water delivery pipe 102, the other end of the water delivery pipe 102 passes through the right side wall of the spray chamber 12 and extends into the spray chamber 12, and the bottom wall of the water delivery pipe 102 is connected to a nozzle 103, a guide plate 13 is installed below the nozzle 103, and the water delivery pipe 102 is installed with a nozzle 103. A valve 104 is provided, and the bottom end of the liquid outlet end of the suction pump 101 is connected to a drain pipe 105, and a second valve 106 is installed on the drain pipe 105. The top wall of the mixing box 8 is connected to a return pipe 11, and the other end of the return pipe 11 is connected to a spray chamber 12. A guide plate 13 is installed in the spray chamber 12, and an air inlet window 14 is provided on the left side wall of the spray chamber 12. The top wall of the spray chamber 12 is connected to an exhaust pipe 15, and an air outlet window 16 is provided on the top wall of the mixing box 8. The dust removal device 1, the denitrification component 2 and the desulfurization component 3 are arranged to work in coordination. When in use, the exhaust gas enters the dust removal device 1 through the air inlet pipe 4 to complete the dust removal operation, and then enters the denitrification component 2 through the air outlet pipe 5 to complete the denitrification operation, and then enters the mixing box 8 through the connecting pipe 6. Under the action of the stirring device 9, it is fully mixed and reacted with the lime water in the mixing box 8, and then enters the spray chamber 12 through the air outlet window 16 and the air inlet window 14. The lime water sprayed from the nozzle 103 can desulfurize the flue gas again. In this process, the guide plate 13 can divert the flue gas so that it can contact with the lime water sprayed from the nozzle 103 more fully, so that the desulfurization is more thorough, and then the purified flue gas is discharged from the exhaust pipe 15, so that the equipment can fully mix the lime water with the flue gas during the desulfurization operation, thereby improving the flue gas treatment effect.

[0030] In one embodiment, please refer to the attached manual.Figure 1 and Figure 3 As a further solution of the present utility model, support columns 17 are fixedly installed at the four corners of the bottom end of the box body 7. The provided support columns 17 provide good support for the box body 7.

[0031] In an embodiment, please refer to the accompanying specification Figure 1 and Figure 2 As a further solution of the present utility model, the denitration assembly 2 includes a denitration tower 21. An air outlet pipe 5 is communicated with the left side wall of the denitration tower 21. A connecting pipe 6 is communicated with the right side wall of the denitration tower 21. A catalytic reaction layer 22 is installed in the inner cavity of the denitration tower 21. An ammonia inlet pipe 23 is communicated with the top wall of the denitration tower 21. And a jet nozzle 24 is installed at the bottom end of the ammonia inlet pipe 23 after passing through the top wall of the denitration tower 21. Support columns 25 are fixedly installed at the four corners of the bottom end of the denitration tower 21. During use, flue gas enters the inner cavity of the denitration tower 21 through the air outlet pipe 5. During this process, ammonia is sprayed out at the jet nozzle 24 at the bottom end of the ammonia inlet pipe 23, so that it reacts with the incoming flue gas. Subsequently, the mixed flue gas flows through the catalytic reaction layer 22 to complete the denitration operation. Then, the denitrated flue gas enters the connecting pipe 6.

[0032] Working process: During use, the flue gas first enters the dust removal device 1 through the air inlet pipe 4. Subsequently, the flue gas after dust removal enters the inner cavity of the denitration tower 21 through the air outlet pipe 5. During this process, ammonia is sprayed out at the jet nozzle 24 at the bottom end of the ammonia inlet pipe 23, so that it reacts with the incoming flue gas. Subsequently, the mixed flue gas flows through the catalytic reaction layer 22 to complete the denitration operation. Then, the denitrated flue gas enters the mixing box 8 through the connecting pipe 6. Subsequently, the driving motor 91 works, drives the stirring blade 93 to work through the rotating shaft 92, so that the flue gas reacts fully with the lime water in the mixing box 8. Then, the desulfurized flue gas enters the spray chamber 12 through the air outlet window 16 and the air inlet window 14. Subsequently, the liquid suction pump 101 works. During this process, the first valve 104 is opened and the second valve 106 is closed. The lime water in the mixing box 8 is sent to the spray head 103 through the water delivery pipe 102 and sprayed out to complete the secondary desulfurization operation of the flue gas. The purified flue gas is discharged through the exhaust pipe 15. Then, the sprayed lime water falls onto the bottom wall of the spray chamber 12 through the guide plate 13. Subsequently, it flows back to the mixing box 8 through the water return pipe 11. When it is necessary to discharge the lime water in the mixing box 8, the liquid suction pump 101 works, the first valve 104 is closed, and the second valve 106 is opened, and the lime water can be discharged.

[0033] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A desulfurization and denitrification device for a cement kiln, comprising a dust removal device (1), a denitrification component (2) and a desulfurization component (3), characterized in that: The left end of the dust removal device (1) is connected to an air inlet pipe (4), the top end of the dust removal device (1) is connected to an air outlet pipe (5), the other end of the air outlet pipe (5) is connected to a denitration component (2), a connecting pipe (6) is connected to the right side wall of the denitration component (2), and the other end of the connecting pipe (6) is connected to a desulfurization component (3). The desulfurization component (3) includes a box body (7). The upper section of the left side wall of the box body (7) is connected to one end of the connecting pipe (6). A mixing box (8) is arranged in the inner cavity of the box body (7). A stirring device (9) is installed in the mixing box (8). A spraying device (10) is connected to the bottom wall of the mixing box (8). A water return pipe (11) is connected to the top wall of the mixing box (8). The other end of the water return pipe (11) is connected to a spraying chamber (12). A guide plate (13) is installed in the spraying chamber (12). An air inlet window (14) is opened on the left side wall of the spraying chamber (12). An exhaust pipe (15) is connected to the top wall of the spraying chamber (12). An air outlet window (16) is opened on the top wall of the mixing box (8).

2. The desulfurization and denitrification equipment for a cement kiln according to claim 1, characterized in that: The stirring device (9) includes a driving motor (91). The driving motor (91) is fixedly installed outside the right side wall of the mixing box (8). The output end of the driving motor (91) is connected to a rotating shaft (92) through a speed reducing device. Stirring blades (93) are installed on the rotating shaft (92), and the rotating shaft (92) is located in the inner cavity of the mixing box (8).

3. A desulfurization and denitrification device for a cement kiln according to claim 1, characterized in that: The spraying device (10) includes a liquid suction pump (101). The liquid inlet end of the liquid suction pump (101) is connected to the bottom wall of the mixing box (8). A water delivery pipe (102) is connected to the right side wall of the liquid outlet end of the liquid suction pump (101). The other end of the water delivery pipe (102) passes through the right side wall of the spraying chamber (12) and extends into the spraying chamber (12). Nozzles (103) are connected to the bottom wall of this section of the water delivery pipe (102). A guide plate (13) is installed below the nozzles (103). A first valve (104) is installed on the water delivery pipe (102).

4. A desulfurization and denitration device for a cement kiln according to claim 3, characterized in that: A drain pipe (105) is connected to the bottom end of the liquid outlet end of the liquid suction pump (101). A second valve (106) is installed on the drain pipe (105).

5. A desulfurization and denitrification device for a cement kiln according to claim 1, characterized in that: Support columns (17) are fixedly installed at the four corners of the bottom end of the box body (7).

6. The desulfurization and denitrification equipment for a cement kiln according to claim 1, characterized in that: The denitration component (2) includes a denitration tower (21). The left side wall of the denitration tower (21) is connected to the air outlet pipe (5). The right side wall of the denitration tower (21) is connected to the connecting pipe (6). A catalytic reaction layer (22) is installed in the inner cavity of the denitration tower (21).

7. The desulfurization and denitration equipment for a cement kiln according to claim 6, characterized in that: An ammonia inlet pipe (23) is connected to the top wall of the denitration tower (21). The bottom end of the ammonia inlet pipe (23) passes through the top wall of the denitration tower (21) and a jet nozzle (24) is installed. Support columns (25) are fixedly installed at the four corners of the bottom end of the denitration tower (21).

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