Waste gas purification device for waste heat power generation of cement cellar

Abstract

The waste gas purification device comprises a purification box, a gas inlet pipe and a negative pressure fan are arranged on the left side and the right side of the purification box respectively, a water storage box is arranged at the top end outside the purification box, and a first water pump and a second water pump are arranged on the two sides of the bottom end of the water storage box respectively. According to the utility model, the first water pump is used for driving the spraying assembly to spray large-particle dust impurities in waste gas to reduce dust, and then the dust filtering screen plate is used for filtering and intercepting small-particle dust in the waste gas to realize secondary dust removal, so that the waste gas purification effect is improved through the combination of two dust removal modes; and a second water pump is started to pump water in a water storage tank into an elastic hose, and a water pipe is used for performing high-pressure flushing on the dust filtering screen plate, so that small-particle dust impurities on the surface of the dust filtering screen plate are cleaned, blockage is avoided, normal operation of waste gas purification work is ensured, and high practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement kiln waste heat power generation, in particular to an exhaust gas purification device used for cement kiln waste heat power generation. Background Art

[0002] In order to further improve the comprehensive utilization value of cement ore, it is necessary to carry out calcination treatment on it. The equipment to be used is cement kiln, which is a calcination equipment with multiple functions, excellent performance and strong professionalism. Cement kiln will generate waste heat during use. The waste heat generated by cement kiln is mainly used for material drying and waste heat power generation. The waste gas after waste heat utilization needs to be purified by purification device to avoid environmental pollution.

[0003] Based on the findings in the prior art, most of the existing exhaust gas purification devices have a single structure, and only rely on filtering components to filter and purify the dust in the exhaust gas. The means are single, and the dust in the exhaust gas cannot be fully eliminated. The purification effect is poor, and the filtering component filtering method is also prone to clogging by dust impurities, which affects the normal exhaust gas purification work and is not practical. Therefore, the utility model proposes an exhaust gas purification device for waste heat power generation in cement kilns to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to propose an exhaust gas purification device for waste heat power generation in cement kilns, so as to solve the problems that the existing exhaust gas purification device method can not fully eliminate the dust in the exhaust gas, the purification effect is poor, and the dust impurities are easy to clog the filter components.

[0005] In order to achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: an exhaust gas purification device for power generation from waste heat of cement kiln, comprising a purification box, an air intake pipe and a negative pressure fan are respectively provided on the left and right sides of the purification box, a water storage tank is provided on the top of the outside of the purification box, a first water pump and a second water pump are respectively provided on both sides of the bottom end of the water storage tank, the output ends of the first water pump and the second water pump both penetrate into the purification box and are respectively connected to a spray assembly and an elastic hose, a dust filter screen is installed on the side of the purification box close to the negative pressure fan, a screw rod driven to rotate by a motor is provided on the side of the purification box close to the elastic hose, a threaded block is threadedly sleeved on the screw rod, a water pipe connected to the elastic hose is fixed on the side of the threaded block close to the dust filter screen, and high-pressure nozzles are equidistantly provided on the side of the water pipe close to the dust filter screen.

[0006] A further improvement is that leakage holes are equidistantly provided at the bottom of the purification box and are located below the spray assembly, a recovery water tank is provided below the leakage holes, an impurity filter is provided inside the recovery water tank, the bottom of the recovery water tank is connected to a circulation pipe through a third water pump, and the top of the circulation pipe is connected to the water storage tank.

[0007] A further improvement is that a water leakage groove is symmetrically opened on one side of the bottom end of the purification box close to the dust filter screen plate, a water box is provided below the bottom end of the water leakage groove, and the bottom end of the water box is connected to the recovery water tank through a waste pipe.

[0008] A further improvement is that: limit blocks are fixed at both ends of the water pipe, limit grooves matching the limit blocks are opened on the inner walls of the front and rear sides of the purification box, and a sealed box door is hingedly installed on the side of the front of the purification box close to the dust filter screen.

[0009] A further improvement is that: a roller distributed in an isosceles triangle and driven to rotate by a motor is provided under the spray assembly, water-splashing plates distributed in a ring shape and equidistantly are fixed to the outer wall of the roller through a connecting rod, the bottom end of the purification box is fixedly connected to a base through symmetrically distributed support rods, and universal wheels are symmetrically installed on the bottom end of the base.

[0010] A further improvement is that the spray assembly includes a main pipe connected to the output end of the first water pump and a branch pipe connected to the main pipe, the branch pipes are equidistantly distributed on both sides of the main pipe, and water spray outlets are equidistantly arranged at the bottom ends of the branch pipes.

[0011] The beneficial effects of the utility model are as follows: the utility model includes a purification box, which first drives the spray assembly through the first water pump to spray and reduce dust on large particles of dust impurities in the exhaust gas, and then filters and intercepts small particles of dust in the exhaust gas through the dust filter screen to achieve secondary dust removal, thereby improving the exhaust gas purification effect through the combination of two dust removal methods, and by starting the second water pump to pump water in the water storage tank into the elastic hose and use the water pipe to perform high-pressure flushing on the dust filter screen, and starting the motor to drive the screw rod to rotate, so that the threaded block on the screw rod drives the water pipe to rise and fall to clean the small particles of dust impurities on the surface of the dust filter screen to avoid blockage, thereby ensuring the normal progress of the exhaust gas purification work and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the utility model;

[0013] Figure 2 It is a front sectional view of the utility model;

[0014] Figure 3 It is a bottom view of the spray assembly of the utility model.

[0015] Among them: 1. purification box; 2. air intake pipe; 3. negative pressure fan; 4. water storage tank; 5. first water pump; 6. second water pump; 7. spray assembly; 8. elastic hose; 9. dust filter screen; 10. screw rod; 11. threaded block; 12. water pipe; 13. water leakage hole; 14. recovery water tank; 15. impurity filter; 16. third water pump; 17. circulation pipe; 18. water leakage groove; 19. water box; 20. waste pipe; 21. limit block; 22. limit groove; 23. roller; 24. water flapper; 25. base; 701, main pipe; 702, branch pipe. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0017] according to Figure 1 , Figure 2 , Figure 3 As shown, the present embodiment provides an exhaust gas purification device for power generation from waste heat of cement kiln, comprising a purification box 1 for filtering and purifying dust impurities in the exhaust gas, and an air intake pipe 2 and a negative pressure fan 3 arranged on the left and right sides of the purification box 1. The air intake pipe 2 is provided with a control valve on one side outside the purification box 1 to facilitate the control of exhaust gas entry. The negative pressure fan 3 is provided with two groups and the air input end extends into the purification box 1. A water storage tank 4 for storing water for spraying is provided at the top of the outside of the purification box 1. A water inlet is also provided at the top of the water storage tank 4. A first water pump 5 is connected to the left side of the bottom end of the water storage tank 4, and the output end of the first water pump 5 passes through the inside of the purification box 1 and is connected to a spray assembly 7. A second water pump 6 is connected to the right side of the bottom end of the water storage tank 4, and the output end of the second water pump 6 passes through the inside of the purification box 1 and is connected to an elastic hose 8 with elastic telescopic function. A filter for filtering and intercepting small particles of dust impurities in the exhaust gas is installed on the right side inside the purification box 1. The dust screen plate 9 first drives the spray assembly 7 through the first water pump 5 to spray and reduce dust on large particles of dust impurities in the exhaust gas, and then filters and intercepts small particles of dust in the exhaust gas through the dust filter screen plate 9 to achieve secondary dust removal, thereby improving the exhaust gas purification effect through the combination of two dust removal methods. A screw rod 10 is provided on the left side of the dust filter screen plate 9, and the screw rod 10 is driven to rotate by the motor at the bottom of the purification box 1. A threaded block 11 is threadedly sleeved on the screw rod 10, and a water pipe 12 is fixedly connected to the right end of the threaded block 11. The top of the water pipe 12 is connected to the elastic hose 8, and the right side of the water pipe 12 is provided with equidistantly distributed high-pressure nozzles. By starting the second water pump 6, water in the water storage tank 4 is pumped into the elastic hose 8 and the dust filter screen plate 9 is washed with high pressure using the water pipe 12, and the motor is started to drive the screw rod 10 to rotate, so that the threaded block 11 on the screw rod 10 drives the water pipe 12 to move up and down to clean the small particles of dust impurities on the surface of the dust filter screen plate 9 to avoid blockage.

[0018] There is a leakage hole 13 at the bottom of the purification box 1, which is located below the spray assembly 7 and is equidistantly distributed. A recovery water tank 14 fixed to the bottom end of the outside of the purification box 1 is provided below the leakage hole 13. The spray water flowing out of the leakage hole 13 is recovered by the recovery water tank 14. An impurity filter 15 for purifying and filtering the spray water is provided inside the recovery water tank 14. A third water pump 16 is connected to the bottom of the recovery water tank 14. The bottom end of the third water pump 16 is the output end and is connected to a circulation pipe 17. The top end of the circulation pipe 17 is the water outlet end and is connected to the water storage tank 4. The filtered and purified spray water is re-pumped into the water storage tank 4 through the third water pump 16 to achieve recycling.

[0019] On the right side of the bottom end of the purification box 1, there are provided water leakage grooves 18 symmetrically distributed on both sides below the dust filter screen 9, and a water box 19 is provided below the bottom end of the water leakage groove 18. The flushing water flowing out of the water leakage groove 18 is recovered through the water box 19, and a waste pipe 20 is connected to the bottom end of the water box 19. The water outlet end of the waste pipe 20 passes through the recovery water tank 14 and is located above the impurity filter screen 15, so as to facilitate the flushing water in the water box 19 to be discharged into the recovery water tank 14.

[0020] Limiting blocks 21 are fixed at both the front and rear ends of the water pipe 12, and limiting grooves 22 adapted to the limiting blocks 21 are opened on the inner walls of the front and rear sides of the purification box 1. The limiting blocks 21 are limited by the limiting grooves 22, so that the water pipe 12 is more stable during the lifting process. A sealed box door is hingedly installed on the side of the front of the purification box 1 close to the dust filter screen plate 9, which is convenient for users to open the purification box 1 and inspect, maintain or replace the dust filter screen plate 9.

[0021] The purification box 1 is also provided with rollers 23 arranged in an isosceles triangle below the displacement spray assembly 7. The rollers 23 are provided in three groups and are driven to rotate by a motor. Connecting rods arranged in an annular shape and equidistantly are fixed on the outer wall of the rollers 23 and a water-slapping plate 24 is fixed through the connecting rod. The motor is started to drive the rollers 23 to drive the water-slapping plate 24 to stir and beat the falling spray water, so that the spray water is more evenly distributed and the dust reduction effect is improved. Support rods are symmetrically fixed to the bottom end of the purification box 1 and a base 25 is fixed to the bottom end of the support rods. Universal wheels are installed at the four corners of the bottom end of the base 25 to facilitate the movement of the device.

[0022] The spray assembly 7 includes a main pipe 701 and a branch pipe 702, wherein the main pipe 701 is connected to the output end of the first water pump 5, and the branch pipe 702 is connected to the main pipe 701. The branch pipes 702 are equidistantly distributed on both sides of the front and rear of the main pipe 701 and have water spray outlets equidistantly arranged at the bottom. Water is pumped into the main pipe 701 by the first water pump 5, and then flows from the main pipe 701 into the branch pipe 702, so that the water is sprayed downward evenly.

[0023] When it is necessary to purify the waste gas generated by the waste heat power generation of the cement kiln, first connect the air inlet pipe 2 to the waste gas outlet of the waste heat power generation of the cement kiln through the flange, and start the negative pressure fan 3 to exhaust the inside of the purification box 1. When the waste gas enters the purification box 1, first start the first water pump 5 to drive the spray component 7 to spray and reduce dust on the incoming waste gas to remove large particles of dust impurities in the waste gas. At the same time, start the motor to drive the roller 23 to drive the water flapping plate 24 to stir and beat the falling spray water, so that the spray water is more evenly distributed and the dust reduction effect is improved. The waste gas after spraying and reducing dust is discharged by the negative pressure fan 3. It flows from left to right and is filtered by the dust filter screen 9 to intercept small dust particles, realizing secondary dust removal, and is finally discharged from the air outlet of the negative pressure fan 3 to the outside of the purification box 1. During the secondary dust removal of the exhaust gas by the dust filter screen 9, its surface will inevitably be blocked by small dust particles and impurities. At this time, the second water pump 6 is started to pump the water in the water storage tank 4 into the elastic hose 8 and use the water pipe 12 to perform high-pressure flushing on the dust filter screen 9, and the motor is started to drive the screw 10 to rotate, so that the threaded block 11 on the screw 10 drives the water pipe 12 to rise and fall, so as to realize the surface cleaning of the dust filter screen 9 to avoid blockage.

[0024] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An exhaust gas purification device for cement kiln waste heat power generation, characterized in that: The invention comprises a purification box (1), wherein an air inlet pipe (2) and a negative pressure fan (3) are respectively arranged on the left and right sides of the purification box (1), a water storage tank (4) is arranged on the top of the outside of the purification box (1), a first water pump (5) and a second water pump (6) are respectively arranged on the two sides of the bottom end of the water storage tank (4), the output ends of the first water pump (5) and the second water pump (6) are both penetrated into the purification box (1) and are respectively connected to a spray assembly (7) and an elastic hose (8), a dust filter screen (9) is installed on the side of the purification box (1) close to the negative pressure fan (3), a screw rod (10) driven to rotate by a motor is arranged on the side of the purification box (1) close to the elastic hose (8), a threaded block (11) is threadedly sleeved on the screw rod (10), a water pipe (12) connected to the elastic hose (8) is fixed on the side of the threaded block (11) close to the dust filter screen plate (9), and high-pressure nozzles are equidistantly arranged on the side of the water pipe (12) close to the dust filter screen plate (9).

2. The exhaust gas purification device for cement kiln waste heat power generation according to claim 1 is characterized by: The bottom end of the purification box (1) is provided with water leakage holes (13) located below the spray assembly (7) at equal intervals, a water recovery tank (14) is provided below the water leakage holes (13), an impurity filter screen (15) is provided inside the water recovery tank (14), the bottom end of the water recovery tank (14) is connected to a circulation pipe (17) via a third water pump (16), and the top end of the circulation pipe (17) is connected to the water storage tank (4).

3. The exhaust gas purification device for cement kiln waste heat power generation according to claim 2 is characterized in that: A water leakage groove (18) is symmetrically provided on one side of the bottom end of the purification box (1) close to the dust filter screen plate (9), a water box (19) is provided below the bottom end of the water leakage groove (18), and the bottom end of the water box (19) is connected to the recovery water tank (14) through a waste discharge pipe (20).

4. The exhaust gas purification device for cement kiln waste heat power generation according to claim 1 is characterized by: Limit blocks (21) are fixed at both the front and rear ends of the water pipe (12); limit grooves (22) adapted to the limit blocks (21) are provided on the inner walls on both the front and rear sides of the purification box (1); and a sealed box door is hingedly installed on one side of the front of the purification box (1) close to the dust filter screen (9).

5. The exhaust gas purification device for cement kiln waste heat power generation according to claim 1 is characterized by: A rotating roller (23) is arranged below the spray assembly (7) and is arranged in an isosceles triangle shape and is driven to rotate by a motor. Water splashing plates (24) that are arranged in an annular shape and are equidistantly distributed are fixed to the outer wall of the rotating roller (23) via a connecting rod. The bottom end of the purification box (1) is fixedly connected to a base (25) via symmetrically distributed support rods. Universal wheels are symmetrically mounted on the bottom end of the base (25).

6. The exhaust gas purification device for cement kiln waste heat power generation according to claim 1 is characterized by: The spray assembly (7) comprises a main pipe (701) connected to the output end of the first water pump (5) and a branch pipe (702) connected to the main pipe (701), wherein the branch pipes (702) are equidistantly distributed on both sides of the main pipe (701) and the bottom ends of the branch pipes (702) are equidistantly provided with water spray outlets.

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