Dry denitration equipment for rotary cement kiln

Abstract

The utility model provides dry denitration equipment for a rotary cement kiln. The dry denitration equipment for the rotary cement kiln comprises a device body, a circulating box is fixedly connected to the device body, a circulating base is fixedly connected to the interior of the circulating box, a circulating pump is fixedly connected to the circulating base, a circulating pipe is fixedly connected to the circulating pump, a circulating output pipe is fixedly connected to the circulating pump, and the circulating output pipe is fixedly connected to the device body. A circulating pump is fixedly connected to the device main body, a circulating electromagnetic valve is arranged on the circulating pump, a water tank is fixedly connected to the device main body, a cooling distillation box is fixedly connected to the device main body, an ammonia gas input pipe is fixedly connected to the cooling distillation box, a condenser is fixedly connected to the ammonia gas input pipe, a liquid ammonia input pipe is fixedly connected to the condenser, and a liquid ammonia outlet pipe is fixedly connected to the liquid ammonia input pipe. A liquid ammonia box is arranged on the device main body, and an exhaust pipe is fixedly connected to the device main body. The dry denitration equipment for the rotary cement kiln has the effect of reducing environmental pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of cement industry flue gas denitration, in particular to a cement rotary kiln dry denitration equipment. Background Art

[0002] Cement rotary kiln is an important equipment in cement production, and its main function is to burn cement clinker. During the burning process of cement rotary kiln, a large amount of nitrogen oxides will be produced, which has caused serious harm to the environment and human health. In order to reduce the emission of nitrogen oxides, cement rotary kiln usually adopts dry denitrification technology.

[0003] Dry denitrification technology refers to spraying denitrification agent into the cement rotary kiln to react with nitrogen oxides and convert them into harmless nitrogen and water. Commonly used denitrification agents include liquid ammonia. In the dry denitrification process, the denitrification agent needs to be sprayed into the cement rotary kiln to react with nitrogen oxides and convert them into harmless nitrogen and water. However, in the dry denitrification process, ammonia escape will occur, that is, ammonia that does not participate in the reaction is discharged into the atmosphere, which will cause serious environmental pollution.

[0004] Therefore, it is necessary to provide a cement rotary kiln dry denitrification equipment to solve the above technical problems. Utility Model Content

[0005] The utility model provides a cement rotary kiln dry denitration device, which solves the problem that ammonia gas not participating in the reaction is discharged into the atmosphere and causes environmental pollution.

[0006] In order to solve the above technical problems, the utility model provides a cement rotary kiln dry denitrification equipment comprising: a device body, a circulation box is fixedly connected to the device body, a circulation base is fixedly connected to the circulation box, a circulation pump is fixedly connected to the circulation base, a circulation pipe is fixedly connected to the circulation pump, a circulation output pipe is fixedly connected to the circulation pump, a circulation solenoid valve is arranged on the circulation pump, a water tank is fixedly connected to the device body, water is arranged inside the water tank, a cooling distillation box is fixedly connected to the device body, the circulation output pipe is fixedly connected to the cooling distillation box, an ammonia input pipe is fixedly connected to the cooling distillation box, a condenser is fixedly connected to the ammonia input pipe, a liquid ammonia input pipe is fixedly connected to the condenser, a liquid ammonia tank is arranged on the device body, the liquid ammonia tank is fixedly connected to the liquid ammonia input pipe, liquid ammonia is arranged inside the liquid ammonia tank, a controller is installed on the device body, and an exhaust pipe is fixedly connected to the device body.

[0007] Preferably, a reduction base is fixedly connected to the device body, a reduction pump is fixedly connected to the reduction base, a reduction liquid inlet pipe is fixedly connected to the original pump, and a reduction output pipe is fixedly connected to the reduction pump.

[0008] Preferably, a reduction shunt pipe is fixedly connected to the reduction output pipe, a plurality of reduction nozzles are evenly arranged on the reduction shunt pipe, and a reduction solenoid valve is arranged on the reduction pump.

[0009] Preferably, a filter fixing frame is fixedly connected to the device body, a filter box is fixedly connected to the filter fixing frame, a filter screen is arranged inside the filter box, and an air inlet is fixedly connected to the filter box.

[0010] Preferably, a device support frame is provided on the device body, an air outlet is fixedly connected to the water tank, a guide plate is provided inside the device body, and a connecting pipe is fixedly connected to the device body.

[0011] Preferably, a cooling diverter pipe is provided inside the cooling distillation box, an observation window is provided on the device body, and a pipeline fixing block is fixedly connected to the device body.

[0012] Preferably, the exhaust pipe is fixedly connected to the water tank.

[0013] Compared with the related art, the cement rotary kiln dry denitrification equipment provided by the utility model has the following beneficial effects:

[0014] The utility model provides a cement rotary kiln dry denitration equipment, which is provided with a circulation pump. When the device is used, the reduced gas will contain part of vaporized ammonia. At this time, the gas is introduced into water, and the circulation pump draws the aqueous solution containing ammonia into the interior of a cooling distillation box. The high-temperature flue gas heats and distills the aqueous solution in the cooling distillation box to distill out the ammonia, and finally liquefies it through a condenser, and the liquid ammonia is input into a liquid ammonia tank for recycling. The device has the function of digesting harmful gases inside the device to reduce the emission of harmful gases, reduces the emission of harmful gases, successfully solves the problem of ammonia escape, and makes the gas finally discharged into the air contain no harmful gases, thereby achieving the effect of reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a preferred embodiment of a cement rotary kiln dry denitrification device provided by the utility model;

[0016] Figure 2 for Figure 1 A schematic cross-sectional view of the device body shown;

[0017] Figure 3 for Figure 2 An enlarged schematic diagram of part A is shown;

[0018] Figure 4 for Figure 2 An enlarged schematic diagram of part B is shown.

[0019] Numbers in the figure: 1. device body, 2. liquid ammonia input pipe, 3. condenser, 4. circulation box, 5. ammonia input pipe, 6. filter fixing block, 7. filter box, 8. air inlet, 9. device support frame, 10. pipe fixing frame, 11. connecting pipe, 12. observation window, 13. controller, 14. exhaust pipe, 15. air outlet, 16. water tank, 17. cooling diverter pipe, 18. filter, 19. guide plate, 20. circulation box, 21. circulation pump, 22. circulation base, 23. circulation output pipe, 24. circulation solenoid valve, 25. reduction solenoid valve, 26. reduction output pipe, 27. reduction diverter pipe, 28. reduction nozzle, 29. reduction base, 30. reduction pump, 31. liquid ammonia tank, 32. liquid ammonia, 33. water, 34. cooling distillation box, 35. reduction liquid inlet pipe. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a cement rotary kiln dry denitrification device provided by the utility model; Figure 2 for Figure 1 A schematic cross-sectional view of the device body shown; Figure 3 for Figure 2 An enlarged schematic diagram of part A is shown; Figure 4 for Figure 2A cement rotary kiln dry denitration device comprises: a device body 1, a circulation box 4 is fixedly connected to the device body 1, a circulation base 22 is fixedly connected to the circulation box 4, a circulation pump 21 is fixedly connected to the circulation base 22, a circulation pipe 20 is fixedly connected to the circulation pump 21, a circulation output pipe 23 is fixedly connected to the circulation pump 21, a circulation solenoid valve 24 is arranged on the circulation pump 21, a water tank 16 is fixedly connected to the device body 1, water 33 is arranged inside the water tank 16, a cooling distillation box 34 is fixedly connected to the device body 1, and the circulation output pipe 23 is fixedly connected to the circulation pump 21. The circulation solenoid valve 24 is arranged on the circulation pump 21, the water tank 16 is fixedly connected to the device body 1, and the cooling distillation box 34 is fixedly connected to the device body 1. The circulation output pipe 23 is fixedly connected to the cooling distillation box 34, the cooling distillation box 34 is fixedly connected to an ammonia input pipe 5, the ammonia input pipe 5 is fixedly connected to a condenser 3, the condenser 3 is fixedly connected to a liquid ammonia input pipe 2, a liquid ammonia tank 31 is provided on the device body 1, the liquid ammonia tank 31 is fixedly connected to the liquid ammonia input pipe 2, liquid ammonia 32 is provided inside the liquid ammonia tank 31, a controller 13 is installed on the device body 1, the device body 1 is fixedly connected to an exhaust pipe 14, and the liquid ammonia 32 serves as a reducing agent to denitrify the flue gas.

[0022] A reduction base 29 is fixedly connected to the device body 1, a reduction pump 30 is fixedly connected to the reduction base 29, a reduction liquid inlet pipe 35 is fixedly connected to the reduction pump 30, a reduction output pipe 26 is fixedly connected to the reduction pump 30, and the reduction pump 30 has the function of pumping ammonia water dissolved with ammonia gas into the cooling distillation box 34.

[0023] The reduction output pipe 26 is fixedly connected with a reduction shunt pipe 27 , and a plurality of reduction nozzles 28 are evenly arranged on the reduction shunt pipe 27 . The reduction pump 30 is provided with a reduction solenoid valve 25 , and the reduction nozzles 28 have the function of spraying liquid ammonia 32 .

[0024] The device body 1 is fixedly connected with a filter fixing frame 6, the filter fixing frame 6 is fixedly connected with a filter box 7, a filter screen 18 is arranged inside the filter box 7, the filter box 7 is fixedly connected with an air inlet 8, and the filter screen 18 has the function of filtering particulate matter in the smoke.

[0025] The device body 1 is provided with a device support frame 9, the water tank 16 is fixedly connected with an air outlet 15, a guide plate 19 is provided inside the device body 1, and a connecting pipe 11 is fixedly connected to the device body 1, and the guide plate 19 has the function of guiding the water 33 generated by the reaction into the water tank 16.

[0026] The cooling distillation box 34 is provided with a cooling shunt pipe 17 inside, the device body 1 is provided with an observation window 12, and the device body 1 is fixedly connected with a pipe fixing block 10, and the pipe fixing block 10 has the function of fixing the circulation pipe 20.

[0027] The exhaust pipe 14 is fixedly connected to the water tank 16 , and the controller 13 has the function of controlling the operation of the device body 1 .

[0028] The working principle of a cement rotary kiln dry denitrification equipment provided by the utility model is as follows:

[0029] When the operator uses the device, the flue gas will form nitrogen and water 33 after reduction. The water 33 formed at this time will enter the water tank 16. At this time, the gas is mixed with vaporized ammonia. At this time, the gas with ammonia will enter the water tank 16 through the exhaust pipe 14. Because ammonia is easily soluble in water 33, the ammonia therein will dissolve in the water 33. Since nitrogen is an inert gas and is not easily soluble in water 33, the nitrogen will be directly discharged. At this time, the circulating pump 21 will draw the aqueous solution containing ammonia into the cooling distillation box 34 through the circulating pipe 20. At this time, the high-temperature flue gas will pass through the cooling distillation box 34 to heat the aqueous solution containing ammonia therein and distill it. At this time, the ammonia will enter the condenser 3 through the ammonia input pipe 5. At this time, the condenser 3 will compress the ammonia and compress the ammonia into liquid ammonia 32. After the compression is completed, the liquid ammonia 32 will be input into the liquid ammonia tank 31 through the liquid ammonia input pipe 2 for recycling.

[0030] Compared with the related art, the cement rotary kiln dry denitrification equipment provided by the utility model has the following beneficial effects:

[0031] The utility model provides a cement rotary kiln dry denitration equipment, which is provided with a circulation pump 21. When the device is used, the reduced gas will contain part of vaporized ammonia. At this time, the gas is introduced into water 33. At this time, the circulation pump 21 draws the aqueous solution containing ammonia into the cooling distillation box 34. The high-temperature flue gas heats and distills the aqueous solution in the cooling distillation box 34 to distill out the ammonia. Finally, it is liquefied through a condenser 3, and the liquid ammonia 32 is input into the liquid ammonia tank 31 for recycling. The device has the function of digesting harmful gases inside the device to reduce the emission of harmful gases, reduces the emission of harmful gases, successfully solves the problem of ammonia escape, and makes the gas finally discharged into the air contain no harmful gases, thereby achieving the effect of reducing environmental pollution.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cement rotary kiln dry denitrification equipment, characterized in that: include: The device body has a circulation box fixedly connected to the device body, a circulation base fixedly connected inside the circulation box, a circulation pump fixedly connected to the circulation base, a circulation pipe fixedly connected to the circulation pump, a circulation output pipe fixedly connected to the circulation pump, a circulation solenoid valve arranged on the circulation pump, a water tank fixedly connected to the device body, water arranged inside the water tank, a cooling distillation box fixedly connected to the device body, the circulation output pipe fixedly connected to the cooling distillation box, an ammonia input pipe fixedly connected to the cooling distillation box, a condenser fixedly connected to the ammonia input pipe, a liquid ammonia input pipe fixedly connected to the condenser, a liquid ammonia tank arranged on the device body, the liquid ammonia tank is fixedly connected to the liquid ammonia input pipe, liquid ammonia is arranged inside the liquid ammonia box, a controller is installed on the device body, and an exhaust pipe is fixedly connected to the device body.

2. The cement rotary kiln dry denitrification equipment according to claim 1, characterized in that: The device body is fixedly connected with a reduction base, the reduction base is fixedly connected with a reduction pump, the reduction pump is fixedly connected with a reduction liquid inlet pipe, and the reduction pump is fixedly connected with a reduction output pipe.

3. The cement rotary kiln dry denitrification equipment according to claim 2, characterized in that: The reduction output pipe is fixedly connected with a reduction shunt pipe, a plurality of reduction nozzles are evenly arranged on the reduction shunt pipe, and the reduction pump is provided with a reduction solenoid valve.

4. The cement rotary kiln dry denitrification equipment according to claim 1, characterized in that: A filter fixing frame is fixedly connected to the device body, a filter box is fixedly connected to the filter fixing frame, a filter screen is arranged inside the filter box, and an air inlet is fixedly connected to the filter box.

5. The cement rotary kiln dry denitrification equipment according to claim 1, characterized in that: A device support frame is arranged on the device body, an air outlet is fixedly connected to the water tank, a guide plate is arranged inside the device body, and a connecting pipe is fixedly connected to the device body.

6. The cement rotary kiln dry denitrification equipment according to claim 1, characterized in that: A cooling shunt pipe is arranged inside the cooling distillation box, an observation window is arranged on the device body, and a pipeline fixing block is fixedly connected to the device body.

7. The cement rotary kiln dry denitrification equipment according to claim 1, characterized in that: The exhaust pipe is fixedly connected to the water tank.

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