Flue gas deacidification device of rotary kiln

Abstract

The invention discloses a flue gas deacidification device of a rotary kiln, and relates to the technical field of flue gas deacidification, the flue gas deacidification device comprises a tower body and a feeding assembly, one side of the tower body is provided with the feeding assembly, the feeding assembly comprises a gas inlet pipe, and one side of the tower body is connected with the gas inlet pipe. When the device is used, the feeding amount of a deacidification agent in the dry-process deacidification section can be automatically regulated and controlled according to the flow of flue gas, regulation through a sensor is not needed, and during regulation and control, a pipeline can be knocked to avoid pipeline blockage caused by accumulation and compression due to the fact that the deacidification agent cannot fall down in time; in addition, during deacidification, the spraying amount of a deacidification agent in the wet-process deacidification section can be automatically regulated and controlled according to the temperature of flue gas, waste heat can be used for drying when waste generated in the deacidification process is mixed into gypsum slurry to be discharged, waste heat recovery is completed while tail gas is cooled, and the waste heat recovery efficiency is improved. And extra energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas deacidification, and specifically to a flue gas deacidification device for a rotary kiln. Background Art

[0002] Rotary kilns are widely used in industries such as metallurgy, chemical engineering, building refractory materials, and environmental sanitation. During their operation, a large amount of flue gas is generated, and the generated flue gas needs to be treated by deacidification, dust removal, etc. to meet the emission standards before being discharged into the atmosphere.

[0003] When the existing flue gas deacidification device is in use, when regulating the feeding amount of the deacidifying agent in the dry deacidification section, usually a sensor is placed in the flue gas flow channel, and then the feeding amount is adjusted according to the data detected by the sensor. The sensor is constantly scoured by acidic flue gas and is prone to corrosion and damage, resulting in inaccurate detection results. Summary of the Invention

[0004] The purpose of the present invention is to provide a flue gas deacidification device for a rotary kiln to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A flue gas deacidification device for a rotary kiln, including a tower body and a feeding assembly. The feeding assembly is arranged on one side of the tower body. The feeding assembly includes an air inlet pipe. The air inlet pipe is connected to one side of the tower body, and one end of the air inlet pipe is rotatably connected to an impeller. One side of the air inlet pipe is connected to a feeding pipe, and one end of the feeding pipe is connected to a feeding cylinder. A feeding hopper is arranged on one side of the feeding cylinder, and a feeding rod is rotatably connected in the feeding cylinder. Transmission wheels are connected to the sides of the impeller and the feeding rod far from the tower body, and a tail gas pipe is connected below the air inlet pipe.

[0006] Further, the transmission wheels are connected by a belt. The feeding cylinder is communicated with the air inlet pipe through the feeding pipe, and the feeding pipe is inclined with respect to the air inlet pipe. The tail gas pipe is L-shaped, and the upper part of the tail gas pipe is trumpet-shaped.

[0007] Further, the other end of the feeding rod is connected to a cam, a support plate is connected to the tower body below the cam, and return springs are symmetrically connected to both sides of the support plate.

[0008] Further, one end of the return spring is connected to a backing plate, sliding rods are symmetrically connected to both sides of the backing plate, one end of the sliding rod is connected to a knocking plate, and the sliding rod is engaged and slidably connected to the support plate. The backing plate is elastically connected to the support plate through the return spring.

[0009] Further, a partition is arranged in the middle of the tower body, a guide plate is arranged between the tower body and the partition, a guide ring is arranged at the lower part of the tower body, and an air outlet is arranged at the upper side of the tower body.

[0010] Further, a steam pump is provided on the upper side of the tower body. One side of the steam pump is connected with a liquid suction pipe, the middle of one side of the steam pump is connected with a liquid discharge pipe, and one end of the liquid discharge pipe is connected with a spray pipe which is located inside the partition plate.

[0011] Further, the other side of the steam pump is connected with a steam inlet pipe, and one end of the steam inlet pipe is connected with a spiral pipe which is located inside the tail gas pipe.

[0012] Further, the other side of the steam pump is also connected with a water return pipe, and one end of the water return pipe is connected with a circulation tank. One side of the circulation tank is connected with a water outlet pipe which is communicated with the spiral pipe.

[0013] Further, the lower side of the tower body is connected with a waste discharge pipe, and the lower part of the waste discharge pipe is connected with a sewage discharge tank. There is an inclination angle between the lower surface of the inner wall of the sewage discharge tank and the horizontal plane.

[0014] Further, one side of the sewage discharge tank is connected with a blower, and one side of the blower is connected with a heating pipe which is spiral. The heating pipe is located inside the tail gas pipe, and the other end of the heating pipe penetrates through the tail gas pipe and communicates with the outside.

[0015] The present invention provides a flue gas deacidification device for a rotary kiln, which has the following beneficial effects: during use, it can automatically adjust the dosage of the deacidifying agent in the dry deacidification section according to the flow rate of the flue gas without adjusting through a sensor. During the adjustment, the pipeline can be knocked to avoid the accumulation and compression caused by the failure of the deacidifying agent to fall in time, resulting in pipeline blockage, and also avoid the adhesion of particulate matter to the inner wall of the pipeline, resulting in blockage. During deacidification, it can automatically adjust the spraying amount of the deacidifying agent in the wet deacidification section according to the temperature of the flue gas. When the waste generated during the deacidification process is discharged after being mixed into gypsum slurry, the waste heat can be used for drying, while cooling the tail gas and completing waste heat recovery, reducing additional energy consumption.

[0016] 1. During the use of the present invention, as the tail gas enters the intake pipe, the impeller can drive the feeding rod to rotate in the feeding cylinder to convey the deacidifying agent in the dry deacidification section. And as the intake amount of the tail gas changes, the rotation speed of the feeding rod automatically changes, so as to automatically adjust the dosage of the deacidifying agent, without detecting and adjusting through a sensor, which speeds up the reaction speed of the adjustment and also avoids the loss caused by the long-term erosion of the sensor by the acidic flue gas.

[0017] 2. When the deacidifying agent in the dry deacidifying section is transported, the feeding rod can drive the cam to rotate synchronously, so that the cam applies force to the pad, and the pad drives the knocking plate through the sliding rod to reciprocate under the support plate, thereby repeatedly knocking on the pipeline, so that the deacidifying agent in the feed pipe is fluffy and falls under the vibration, avoiding the accumulation of the deacidifying agent in the feed pipe, resulting in force compression in the feed barrel, and then causing the feed barrel and feed pipe to be blocked. At the same time, the knocking can also shake off the particles on the inner wall of the intake pipe, avoiding the particles adhering to the inner wall of the intake pipe and causing the intake pipe to be blocked.

[0018] 3. When the present invention is in use, the heating tube and the spiral tube can cool down the flue gas in turn to prevent high-temperature flue gas from directly entering the device and causing damage to the device, and the air that absorbs heat in the heating tube can be sent to the sewage tank to dry the gypsum slurry in the sewage tank, and the circulating water in the spiral tube absorbs heat and evaporates to form steam, which can provide power for the steam pump, so that the external wet deacidification agent is drawn into the liquid outlet pipe and sprayed to the inside of the partition through the spray pipe to wet deacidify the flue gas. As the temperature of the flue gas changes, the amount of steam generated in the spiral tube will also change, thereby changing the operating power of the steam pump, and then automatically dynamically adjusting the spraying amount of the wet deacidification agent, and realizing waste heat recovery to reduce additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall half-section three-dimensional structure of a flue gas deacidification device of a rotary kiln according to the present invention; Figure 2 It is a schematic diagram of a half-section three-dimensional structure of a feeding assembly of a flue gas deacidification device of a rotary kiln according to the present invention; Figure 3 It is a schematic diagram of the cross-sectional front view of the structure of a flue gas deacidification device of a rotary kiln according to the present invention; Figure 4 It is a schematic diagram of the overall three-dimensional structure of a flue gas deacidification device of a rotary kiln according to the present invention; Figure 5 It is a schematic diagram of a half-cut three-dimensional exploded structure of a tower body of a flue gas deacidification device of a rotary kiln according to the present invention; Figure 6 The present invention is a schematic diagram of the three-dimensional exploded structure of a sewage discharge tank of a flue gas deacidification device of a rotary kiln.

[0020] In the figure: 1. Tower body; 2. Feeding assembly; 201. Inlet pipe; 202. Impeller; 203. Feed pipe; 204. Feeding cylinder; 205. Feed hopper; 206. Feeding rod; 207. Driving wheel; 208. Tail gas pipe; 3. Cam; 4. Support plate; 5. Return spring; 6. Base plate; 7. Slide bar; 8. Knocking plate; 9. Partition plate; 10. Deflector; 11. Deflection ring; 12. Air outlet; 13. Steam pump; 14. Liquid suction pipe; 15. Liquid discharge pipe; 16. Spray pipe; 17. Steam inlet pipe; 18. Spiral pipe; 19. Return water pipe; 20. Circulation tank; 21. Water outlet pipe; 22. Waste discharge pipe; 23. Sewage tank; 24. Fan; 25. Heating pipe. Detailed implementation mode

[0021] Please refer to Figures 1 to 6 , the present invention provides a technical solution: a flue gas deacidification device for a rotary kiln, including a tower body 1 and a feeding assembly 2. A feeding assembly 2 is arranged on one side of the tower body 1. The feeding assembly 2 includes an inlet pipe 201. An inlet pipe 201 is connected to one side of the tower body 1, and an impeller 202 is rotatably connected to one end of the inlet pipe 201. A feed pipe 203 is connected to one side of the inlet pipe 201, and a feeding cylinder 204 is connected to one end of the feed pipe 203. A feed hopper 205 is arranged on one side of the feeding cylinder 204, and a feeding rod 206 is rotatably connected in the feeding cylinder 204. Driving wheels 207 are connected to the sides of the impeller 202 and the feeding rod 206 far from the tower body 1. A tail gas pipe 208 is connected below the inlet pipe 201.

[0022] Please refer to Figures 1 to 4 , the driving wheels 207 are connected by a belt. The feeding cylinder 204 is communicated with the inlet pipe 201 through the feed pipe 203, and the feed pipe 203 is inclined with respect to the inlet pipe 201. The tail gas pipe 208 is L-shaped, and the upper part of the tail gas pipe 208 is bell-shaped. The other end of the feeding rod 206 is connected to a cam 3. A support plate 4 is connected to the tower body 1 below the cam 3. Return springs 5 are symmetrically connected to both sides of the support plate 4. One end of the return spring 5 is connected to a base plate 6, and slide bars 7 are symmetrically connected to both sides of the base plate 6. One end of the slide bar 7 is connected to a knocking plate 8, and the slide bar 7 is engaged and slidably connected to the support plate 4. The base plate 6 is elastically connected to the support plate 4 through the return spring 5; The specific operation is as follows. When in use, as the exhaust gas enters the intake pipe 201, the impeller 202 can drive the feeding rod 206 to rotate in the feeding barrel 204 to transport the deacidification agent of the dry deacidification section. As the amount of exhaust gas entering changes, the rotation speed of the feeding rod 206 automatically changes, thereby automatically regulating the amount of deacidification agent to be delivered. There is no need to detect and then regulate through the sensor, which speeds up the reaction speed of regulation and avoids the loss of the sensor caused by long-term erosion of acidic flue gas. When the deacidification agent of the dry deacidification section is transported, the feeding rod 20 6 can drive the cam 3 to rotate synchronously, so that the cam 3 applies force to the pad 6, so that the pad 6 drives the knocking plate 8 to reciprocate under the support plate 4 through the sliding rod 7, thereby repeatedly knocking the pipeline, so that the deacidifying agent in the feed pipe 203 is fluffy and falls under the vibration, avoiding the accumulation of the deacidifying agent in the feed pipe 203, resulting in force compression in the feed barrel 204, and then causing the feed barrel 204 and the feed pipe 203 to be blocked. At the same time, the knocking can also shake off the particles on the inner wall of the intake pipe 201, avoiding the particles adhering to the inner wall of the intake pipe 201 and causing the intake pipe 201 to be blocked.

[0023] See also Figure 1 and Figures 3 to 6 A partition 9 is provided in the middle of the tower body 1, and a guide plate 10 is provided between the tower body 1 and the partition 9, a guide ring 11 is provided in the lower part of the tower body 1, and an air outlet 12 is provided on the upper side of the tower body 1, a steam pump 13 is provided on the upper side of the tower body 1, and a liquid suction pipe 14 is connected to one side of the steam pump 13, a liquid outlet pipe 15 is connected to the middle of one side of the steam pump 13, and one end of the liquid outlet pipe 15 is connected to a spray pipe 16, and the spray pipe 16 is located on the inner side of the partition 9, a steam inlet pipe 17 is connected to the other side of the steam pump 13, and one end of the steam inlet pipe 17 is connected to a spiral pipe 18, and the spiral pipe 18 is located in the tail gas pipe 208, the steam The other side of the pump 13 is also connected to a return pipe 19, and one end of the return pipe 19 is connected to a circulation box 20, one side of the circulation box 20 is connected to a water outlet pipe 21, and the water outlet pipe 21 is connected to the spiral tube 18, the lower side of the tower body 1 is connected to a waste pipe 22, and the lower part of the waste pipe 22 is connected to a sewage trough 23, there is an inclination angle between the lower surface of the inner wall of the sewage trough 23 and the horizontal plane, one side of the sewage trough 23 is connected to a fan 24, and one side of the fan 24 is connected to a heating pipe 25, the heating pipe 25 is spiral, and the heating pipe 25 is located in the tail gas pipe 208, and the other end of the heating pipe 25 penetrates the tail gas pipe 208 and is connected to the outside; The specific operation is as follows. During use, the heating pipe 25 and the spiral pipe 18 can cool the flue gas successively to avoid damage to the device caused by direct entry of high-temperature flue gas into the device. Moreover, the air that has absorbed heat in the heating pipe 25 can be sent into the sewage discharge tank 23 to dry the gypsum slurry in the sewage discharge tank 23. The circulating water in the spiral pipe 18 absorbs heat and evaporates to form steam, which can provide power for the steam pump 13, thereby pumping the external wet desulfurization agent into the liquid outlet pipe 15 and spraying it onto the inner side of the partition plate 9 through the spray pipe 16 to carry out wet desulfurization of the flue gas. As the temperature of the flue gas changes, the amount of steam generated in the spiral pipe 18 also changes, so that the operating power of the steam pump 13 changes, and then the spraying amount of the wet desulfurization agent is automatically and dynamically regulated, realizing waste heat recovery and reducing additional energy consumption.

[0024] In summary, for this flue gas desulfurization device of a rotary kiln, during use, first send the flue gas into the tail gas pipe 208. The heating pipe 25 and the spiral pipe 18 can absorb heat and cool the flue gas in multiple stages, and can reduce the temperature of the flue gas to within the tolerance range of the device, avoiding direct entry of high-temperature flue gas into the intake pipe 201 and causing damage to the internal structure of the device. The flue gas enters the intake pipe 201 after being accelerated in the tail gas pipe 208, driving the impeller 202 to rotate in the intake pipe 201. Then, through the belt drive between the transmission wheels 207, the feeding rod 206 is driven to rotate in the feeding cylinder 204 to convey the dry desulfurization agent in the feeding cylinder 204. The dry desulfurization agent can be replenished from the feed hopper 205. After the dry desulfurization agent moves to the connection between the feeding cylinder 204 and the feeding pipe 203, it can slide down along the feeding pipe 203 and be sucked into the intake pipe 201 under the action of the flue gas flow, and enter the tower body 1 together with the flue gas. As the inflow of the flue gas changes, the rotation speed of the impeller 202 also changes accordingly, driving the rotation speed of the feeding rod 206 to change, and then automatically and dynamically regulating the feeding amount of the dry desulfurization agent. There is no need to detect through a sensor and then carry out regulation, which speeds up the reaction speed of the regulation and also avoids the loss caused by long-term erosion of the sensor by acidic flue gas. When the deacidifying agent of the dry deacidifying section is transported, the feeding rod 206 can drive the cam 3 to rotate synchronously, so that the cam 3 applies force to the pad 6, so that the pad 6 is reciprocated and lifted above the support plate 4 under the action of the reset spring 5, so that the pad 6 drives the knocking plate 8 to reciprocate under the support plate 4 through the sliding rod 7. The support plate 4 can limit the movement trajectory of the pad 6 and the knocking plate 8 through the sliding rod 7 to avoid the pad 6 and the knocking plate 8 from deflecting when moving. As the knocking plate 8 moves, the knocking plate 8 can repeatedly knock on the outer wall of the intake pipe 201 The knocking causes it to vibrate. After the vibration is transmitted to the feed pipe 203, the deacidification agent in the feed pipe 203 can be fluffy and fall down under the vibration, thereby preventing the dry deacidification agent from accumulating in the feed pipe 203, causing the dry deacidification agent in the feed barrel 204 to be compressed under the operation of the feed rod 206, thereby causing the feed barrel 204 and the feed pipe 203 to be blocked. At the same time, the knocking can also shake off the particles on the inner wall of the air inlet pipe 201, so that it can enter the tower body 1 together with the flue gas, thereby preventing the particles from adhering to the inner wall of the air inlet pipe 201 and causing the air inlet pipe 201 to be blocked; After the flue gas enters the tower body 1, it can move downward in a spiral along the guide plate 10 in the tower body 1 and mix with the dry deacidification agent, thereby performing dry deacidification on the flue gas. After the flue gas flows to the lower part of the tower body 1, the solid waste falls close to the inner wall of the tower body 1 under the action of centrifugal force, while the flue gas enters the inner side of the partition plate 9 under the action of the guide ring 11 and spirally rises. After the circulating water in the circulation box 20 enters the spiral tube 18 from the outlet pipe 21, it absorbs the heat of the flue gas to form steam, and then enters from the steam inlet pipe 17 The steam pump 13 is provided with power so that the steam pump 13 absorbs the wet deacidification agent placed outside through the liquid suction pipe 14, and sends it into the spray pipe 16 through the liquid outlet pipe 15 and sprays it to the inner side of the partition 9 to perform wet deacidification on the flue gas. During the wet deacidification, as the temperature of the flue gas changes, the amount of steam and the steam pressure generated in the spiral tube 18 will also change, thereby causing the operating power of the steam pump 13 to change, and then automatically dynamically adjusting the spraying amount of the wet deacidification agent; After deacidification, the flue gas leaves the tower body 1 from the gas outlet 12 and undergoes other purification processes, while the waste liquid that absorbs the acidic substances in the flue gas falls to the lower part of the tower body 1, mixes with the solid waste generated in the dry deacidification section to form gypsum slurry, and then enters the sewage trough 23 from the waste pipe 22 and slides along the inclined surface of the sewage trough 23. At this time, the fan 24 sends the air in the heating pipe 25 that absorbs the heat of the flue gas into the sewage trough 23, so that the gypsum slurry in the sewage trough 23 can be heated and dried, thereby realizing the waste heat recovery of the rotary kiln and reducing additional energy consumption.

[0025] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0026] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that due to the limitation of literal expression and objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. A flue gas deacidification device for a rotary kiln, characterized in that, It includes a tower body (1) and a feeding assembly (2). The feeding assembly (2) is arranged on one side of the tower body (1). The feeding assembly (2) includes an air inlet pipe (201). The air inlet pipe (201) is connected to one side of the tower body (1), and one end of the air inlet pipe (201) is rotatably connected to an impeller (202). One side of the air inlet pipe (201) is connected to a feeding pipe (203), and one end of the feeding pipe (203) is connected to a feeding cylinder (204). A feeding hopper (205) is arranged on one side of the feeding cylinder (204), and a feeding rod (206) is rotatably connected inside the feeding cylinder (204). Transmission wheels (207) are connected to the sides of the impeller (202) and the feeding rod (206) far from the tower body (1). A tail gas pipe (208) is connected below the air inlet pipe (201).

2. The flue gas deacidification device of a rotary kiln according to claim 1, characterized in that, The transmission wheels (207) are connected by a belt. The feeding cylinder (204) is communicated with the air inlet pipe (201) through the feeding pipe (203), and the feeding pipe (203) is inclinedly distributed with respect to the air inlet pipe (201). The tail gas pipe (208) is L-shaped, and the upper part of the tail gas pipe (208) is bell-shaped.

3. The flue gas deacidification device of a rotary kiln according to claim 1, characterized in that, The other end of the feeding rod (206) is connected to a cam (3). A support plate (4) is connected to the tower body (1) below the cam (3). Return springs (5) are symmetrically connected to both sides of the support plate (4).

4. The flue gas deacidification device for a rotary kiln according to claim 3, characterized in that, One end of the return spring (5) is connected to a backing plate (6), and sliding rods (7) are symmetrically connected to both sides of the backing plate (6). One end of the sliding rod (7) is connected to a knocking plate (8), and the sliding rod (7) is engaged and slidably connected with the support plate (4). The backing plate (6) is elastically connected to the support plate (4) through the return spring (5).

5. The flue gas deacidification device for a rotary kiln according to claim 1, characterized in that, A partition plate (9) is arranged in the middle of the tower body (1), and a flow guiding plate (10) is arranged between the tower body (1) and the partition plate (9). A flow guiding ring (11) is arranged at the lower part inside the tower body (1), and an air outlet (12) is arranged on the upper side of the tower body (1).

6. The flue gas deacidification device of a rotary kiln according to claim 5, characterized in that, A steam pump (13) is arranged on the upper side of the tower body (1). A liquid suction pipe (14) is connected to one side of the steam pump (13). A liquid outlet pipe (15) is connected to the middle of one side of the steam pump (13), and one end of the liquid outlet pipe (15) is connected to a spray pipe (16). The spray pipe (16) is located inside the partition plate (9).

7. The flue gas deacidification device of a rotary kiln according to claim 6, characterized in that, Another side of the steam pump (13) is connected to a steam inlet pipe (17), and one end of the steam inlet pipe (17) is connected to a spiral pipe (18). The spiral pipe (18) is located inside the tail gas pipe (208).

8. The flue gas deacidification device for a rotary kiln according to claim 7, characterized in that, Another side of the steam pump (13) is also connected to a water return pipe (19), and one end of the water return pipe (19) is connected to a circulation tank (20). A water outlet pipe (21) is connected to one side of the circulation tank (20), and the water outlet pipe (21) is communicated with the spiral pipe (18).

9. The flue gas deacidification device for a rotary kiln according to claim 1, characterized in that, A waste discharge pipe (22) is connected to the lower side of the tower body (1), and a sewage discharge tank (23) is connected below the waste discharge pipe (22). There is an inclination angle between the lower surface of the inner wall of the sewage discharge tank (23) and the horizontal plane.

10. The flue gas deacidification device of a rotary kiln according to claim 9, characterized in that, One side of the sewage discharge tank (23) is connected to a blower (24), and one side of the blower (24) is connected to a heating pipe (25). The heating pipe (25) is spiral and is located in the tail gas pipe (208). The other end of the heating pipe (25) penetrates through the tail gas pipe (208) and communicates with the outside.

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