Semi-dry desulfurization testing device of circulating fluidized bed

Abstract

The utility model relates to the field of desulfurization testing devices, in particular to a semi-dry desulfurization testing device of a circulating fluidized bed, which comprises a bottom plate, and a cyclone separator is arranged at the upper end of the bottom plate. Simulated high-temperature flue gas enters from the bottom of the feeding bin and is accelerated by the venturi in the reaction bed, a desulfurizing agent and water are added above the venturi to form a suspended bed layer, and after being discharged from the reaction bed, a reaction product enters the first bag collector through the gas return pipe and the fixed cover and then enters the cyclone separator, so that the flue gas enters the first bag collector through the gas return pipe and the fixed cover. Gas-solid separation and cloth bag dust removal are performed through a cyclone separator, a solid phase falls into a first material return bin at the bottom, gas is discharged from the top of a flue gas discharge pipe through an exhaust mechanism, and a waste material part returns to the reaction bed through a material return mechanism; the problems that in the prior art, a semi-dry desulfurization testing device cannot return a waste material part in the testing process to a circular reaction bed through a feeder, and detection of material performance is difficult to improve are solved.

Description

Technical Field

[0001] The utility model belongs to the field of desulfurization testing devices, in particular to a semi-dry desulfurization testing device for a circulating fluidized bed. Background Art

[0002] Circulating fluidized bed semi-dry desulfurization technology is a highly efficient flue gas desulfurization method, widely used in power and industrial boilers. Its main principle is to use desulfurizers such as limestone to react with sulfur dioxide in the flue gas in a fluidized bed to produce harmless gypsum. Compared with traditional wet desulfurization, the semi-dry method has the advantages of low energy consumption, flexible operation and simple wastewater treatment.

[0003] Desulfurization experimental test is a method used to evaluate and verify the efficiency of desulfurization technology or equipment. Its main purpose is to measure the removal rate of sulfur dioxide in flue gas and the reaction performance of desulfurizer. Through this type of test, the desulfurization process parameters can be optimized to ensure compliance with environmental protection standards. However, the semi-dry desulfurization test device in the existing technology is difficult to simulate high-temperature flue gas entering from the bottom of the circulating reaction bed, and it is impossible to return the waste part of the test process to the circulating reaction bed through the feeder, making it difficult to improve the detection of material properties.

[0004] Therefore, a semi-dry desulfurization test device for a circulating fluidized bed is proposed, which can simulate high-temperature flue gas entering from the bottom of the circulating reaction bed and return the waste part in the test process to the circulating reaction bed through the feeder, thereby improving the detection of material properties. Utility Model Content

[0005] In order to overcome the problem that the semi-dry desulfurization test device in the prior art is difficult to simulate the high-temperature flue gas entering from the bottom of the circulating reaction bed, the waste part in the test process cannot be returned to the circulating reaction bed through the feeder, and it is difficult to improve the detection of material properties.

[0006] The technical scheme of the utility model is as follows: a semi-dry desulfurization test device for a circulating fluidized bed comprises a bottom plate; a cyclone separator is arranged at the upper end of the bottom plate, a first return bin is threadedly installed on the inner wall of the discharge end of the cyclone separator, a first bag dust collector is fixedly connected to the gas outlet end of the cyclone separator, a feed bin is fixedly connected to the upper end of the bottom plate, a thermocouple is fixedly connected to the upper end of the feed bin, a reaction bed is fixedly connected to the upper end of the thermocouple, a flue gas exhaust pipe is fixedly connected to the upper end of the reaction bed, a collection box is arranged on the flue gas exhaust pipe, a sampling mechanism is arranged on the collection box, a return mechanism and a flue gas discharge mechanism are arranged on the side wall of the feed bin, a detection mechanism is also arranged on the upper end of the bottom plate, a return air pipe is fixedly connected to the side wall of the return air pipe in a through-type manner, a fixed cover is connected to the side wall pipeline of the return air pipe, a lower end of the fixed cover is fixedly connected to the upper end of the first bag dust collector, a venturi device is arranged in the reaction bed, and an exhaust mechanism is arranged on the side wall of the cyclone separator.

[0007] When in use, simulated high-temperature flue gas enters from the bottom of the feed bin, is accelerated by the venturi device in the reaction bed, and desulfurizer and water are added above the venturi to form a suspended bed layer. After the reaction product is discharged from the reaction bed, it enters the first bag dust collector through the return air pipe and the fixed cover, and then enters the cyclone separator. After the cyclone separator is subjected to gas-solid separation + bag dust removal, the solid phase falls into the first return bin at the bottom, and the gas is discharged from the top of the flue gas exhaust pipe through the exhaust mechanism, and the waste part returns to the reaction bed through the return mechanism, which solves the problem that the semi-dry desulfurization test device in the prior art is difficult to simulate high-temperature flue gas entering from the bottom of the circulating reaction bed, and the waste part in the test process cannot be returned to the circulating reaction bed through the feeder, making it difficult to improve the detection of material properties.

[0008] The exhaust mechanism includes an air outlet pipe and a second bag dust collector. The other gas outlet end of the side wall of the cyclone separator is fixedly connected to the air outlet pipe. The second bag dust collector is installed on the upper end of the air outlet pipe. The upper end of the second bag dust collector is fixedly connected to the lower end of the return air pipe.

[0009] The return mechanism includes a second return bin, a blower, a sealing cover, a return pipe and an electric valve; the second return bin is fixedly connected to the upper end of the bottom plate, a blower is threadedly installed on the inner wall of the upper end of the second return bin, a sealing cover is fixedly connected to the upper end of the blower, one end of the return pipe is fixedly connected to the lower part of the side wall of the second return bin, the other end of the return pipe passes through the side wall of the feed bin and extends to the inner wall of the feed bin, an electric valve is fixedly arranged on the return pipe, and the air outlet port of the blower faces downward.

[0010] The smoke exhaust mechanism includes a smoke inlet pipe, a smoke fan and a heater; one end of the smoke inlet pipe is fixedly connected to the side wall of the feed bin, the other end of the smoke inlet pipe is fixedly connected to the smoke fan, and the side wall of the smoke inlet pipe is fixedly connected to the heater.

[0011] The detection mechanism comprises a fixed platform, a mass flow display and a smoke component detector; the upper end of the bottom plate is fixedly connected with the fixed platform, and the upper end of the fixed platform is fixedly connected with the mass flow display and the smoke component detector.

[0012] The sampling mechanism includes a U-shaped block, a motor, a screw body, a screw nut and a detection piece; the end of the collection box away from the center of the smoke exhaust pipe is frame-shaped, the end of the collection box away from the smoke exhaust pipe is fixedly connected to the U-shaped block, the end of the U-shaped block away from the smoke exhaust pipe is fixedly connected to the motor, the output shaft of the motor passes through the U-shaped block and is fixedly connected to the screw body, the outer wall of the screw body is threadedly installed with a screw nut, the side wall of the screw nut is provided with evenly distributed grooves, and the inner wall of the groove is installed with a detection piece through bolts.

[0013] The collection box and the air return pipe correspond to each other, and the inner wall of one end of the air return pipe close to the smoke exhaust pipe is flush with the outer wall of the screw rod body.

[0014] The beneficial effects of the utility model are as follows: by simulating high-temperature flue gas entering from the bottom of the feed bin, accelerating through the venturi device in the reaction bed, adding desulfurizer and water above the venturi to form a suspended bed layer, and after the reaction product is discharged from the reaction bed, it enters the first bag dust collector through the return air pipe and the fixed cover, and then enters the cyclone separator, and undergoes gas-solid separation + bag dust removal through the cyclone separator, and the solid phase falls into the first return bin at the bottom, and the gas is discharged from the top of the flue gas exhaust pipe through the exhaust mechanism, and the waste part returns to the reaction bed through the return mechanism, thereby solving the problem that the semi-dry desulfurization test device in the prior art is difficult to simulate high-temperature flue gas entering from the bottom of the circulating reaction bed, and the waste part in the test process cannot be returned to the circulating reaction bed through the feeder, and it is difficult to improve the detection of material properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a semi-dry desulfurization test device of a circulating fluidized bed of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of a fixing platform of a semi-dry desulfurization testing device for a circulating fluidized bed of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the flue gas inlet pipe of the semi-dry desulfurization test device of the circulating fluidized bed of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the second return bin of the semi-dry desulfurization test device of the circulating fluidized bed of the utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the sampling mechanism of the semi-dry desulfurization testing device of the circulating fluidized bed of the utility model.

[0020] The markings in the attached drawings are: 1. bottom plate, 2. cyclone separator, 3. first return bin, 4. first bag dust collector, 5. outlet pipe, 6. return pipe, 7. second bag dust collector, 8. fixed cover, 9. feed bin, 10. thermocouple, 11. reaction bed, 12. flue gas exhaust pipe, 13. collection box, 14. fixed table, 15. mass flow display, 16. flue gas composition detector, 17. flue gas inlet pipe, 18. flue gas fan, 19. heater, 20. second return bin, 21. blower, 22. sealing cover, 23. return pipe, 24. electric valve, 25. U-shaped block, 26. motor, 27. screw body, 28. screw nut, 29. groove, 30. detection sheet. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the utility model provides an embodiment: a semi-dry desulfurization test device for a circulating fluidized bed, comprising a bottom plate 1; a cyclone separator 2 is arranged at the upper end of the bottom plate 1, a first return bin 3 is threadedly installed on the inner wall of the discharge end of the cyclone separator 2, a first bag dust collector 4 is fixedly connected to the gas outlet end of the cyclone separator 2, a feed bin 9 is fixedly connected to the upper end of the bottom plate 1, a thermocouple 10 is fixedly connected to the upper end of the feed bin 9, a reaction bed 11 is fixedly connected to the upper end of the thermocouple 10, and a reaction bed 11 is fixedly connected to the upper end of the reaction bed 11. A flue gas exhaust pipe 12 is connected, a collection box 13 is provided on the flue gas exhaust pipe 12, a sampling mechanism is provided on the collection box 13, a material return mechanism and a flue gas discharge mechanism are provided on the side wall of the feed bin 9, a detection mechanism is also provided on the upper end of the bottom plate 1, a return air pipe 6 is fixedly connected to the side wall of the flue gas exhaust pipe 12, a fixed cover 8 is connected to the side wall pipe of the return air pipe 6, and the lower end of the fixed cover 8 is fixedly connected to the upper end of the first bag dust collector 4, a venturi device is provided in the reaction bed 11, and an exhaust mechanism is provided on the side wall of the cyclone separator 2.

[0023] When in use, simulated high-temperature flue gas enters from the bottom of the feed bin 9, is accelerated by the venturi in the reaction bed 11, and the desulfurizer and water are added above the venturi to form a suspended bed layer. After the reaction product is discharged from the reaction bed 11, it enters the first bag dust collector 4 through the return air pipe 6 and the fixed cover 8, and then enters the cyclone separator 2. After the cyclone separator 2 is subjected to gas-solid separation + bag dust removal, the solid phase falls into the first return bin 3 at the bottom, and the gas is discharged from the top of the flue gas exhaust pipe 12 through the exhaust mechanism, and the waste part returns to the reaction bed 11 through the return mechanism.

[0024] like Figure 1 As shown, in this embodiment, the exhaust mechanism includes an outlet pipe 5 and a second bag dust collector 7. The other gas outlet end of the side wall of the cyclone separator 2 is fixedly connected to the outlet pipe 5. The second bag dust collector 7 is installed on the upper end of the outlet pipe 5. The upper end of the second bag dust collector 7 is fixedly connected to the lower end of the return air pipe 6. The gas generated during the reaction of the reaction products will enter the return air pipe 6 through the outlet pipe 5 and the second bag dust collector 7, and then be discharged into the air through the flue gas exhaust pipe 12.

[0025] like Figure 1 and Figure 4As shown, in the present embodiment, the return mechanism comprises a second return bin 20, a blower 21, a sealing cover 22, a return pipe 23 and an electric valve 24; the second return bin 20 is fixedly connected to the upper end of the bottom plate 1, the blower 21 is threadedly installed on the inner wall of the upper end of the second return bin 20, the sealing cover 22 is fixedly connected to the upper end of the blower 21, one end of the return pipe 23 is fixedly connected to the lower part of the side wall of the second return bin 20, the other end of the return pipe 23 passes through the side wall of the feed bin 9 and extends to the inner wall of the feed bin 9, the electric valve 24 is fixedly arranged on the return pipe 23, the air outlet port of the blower 21 faces downward, after placing the waste part to be tested inside the second return bin 20, the blower 21 is threadedly installed on the inner wall of the upper end of the second return bin 20, the blower 21 is turned on to form a downward wind force, and the waste in the second return bin 20 can be blown into the feed bin 9 through the return pipe 23, and then reach the reaction bed 11 through the thermocouple 10 for continued circulation reaction.

[0026] like Figure 1 and Figure 3 As shown, in the present embodiment, the smoke exhaust mechanism includes a smoke inlet pipe 17, a smoke fan 18 and a heater 19; one end of the smoke inlet pipe 17 is fixedly connected to the side wall of the feed bin 9 in a through-type manner, the other end of the smoke inlet pipe 17 is fixedly connected to the smoke fan 18, and the side wall of the smoke inlet pipe 17 is fixedly connected to the heater 19. When the smoke fan 18 is turned on, the gas can be injected into the feed bin 9 through the smoke inlet pipe 17.

[0027] like Figure 1 and Figure 2 As shown, in this embodiment, the detection mechanism includes a fixing platform 14, a mass flow display 15 and a smoke component detector 16; the upper end of the bottom plate 1 is fixedly connected to the fixing platform 14, and the upper end of the fixing platform 14 is fixedly connected to the mass flow display 15 and the smoke component detector 16. When in use, the mass flow display 15 displays the smoke mass flow value in the reaction bed 11. After the reaction, the smoke component detector 16 is turned on to quickly detect the captured smoke components.

[0028] like Figure 1 and Figure 5As shown, in this embodiment, the sampling mechanism includes a U-shaped block 25, a motor 26, a screw body 27, a screw nut 28 and a detection piece 30; the end of the collection box 13 away from the center of the smoke exhaust pipe 12 is frame-shaped, the end of the collection box 13 away from the smoke exhaust pipe 12 is fixedly connected to the U-shaped block 25, the end of the U-shaped block 25 away from the smoke exhaust pipe 12 is fixedly connected to the motor 26, the output shaft of the motor 26 passes through the U-shaped block 25 and is fixedly connected to the screw body 27, the outer wall of the screw body 27 is threadedly installed with a screw nut 28, and the side wall of the screw nut 28 is opened There are evenly distributed grooves 29, and the inner wall of the groove 29 is installed with a detection piece 30 by bolts. When in use, the motor 26 is turned on to rotate the screw body 27, and the screw nut 28 will move along the side wall of the screw body 27, which will drive the detection piece 30 to move, and move the detection piece 30 to the central area of ​​the smoke exhaust pipe 12. The detection piece 30 can absorb part of the smoke discharged upward from the smoke exhaust pipe 12. When the detection piece 30 is taken out from the inner wall of the groove 29, the smoke composition detector 16 can be used to quickly detect the detection piece 30.

[0029] like Figure 1 and Figure 5 As shown, in this embodiment, the collection box 13 and the return air pipe 6 correspond to each other, and the inner wall of one end of the return air pipe 6 close to the smoke exhaust pipe 12 is flush with the outer wall of the screw body 27. The gas entering the smoke exhaust pipe 12 through the return air pipe 6 will directly impact the screw body 27, making it convenient for the detection piece 30 to collect such gas.

[0030] Working principle: First, simulate high-temperature flue gas entering from the bottom of the feed bin 9. Turn on the flue gas fan 18 to inject the gas into the feed bin 9 through the flue gas inlet pipe 17, accelerate through the venturi in the reaction bed 11, add desulfurizer and water above the venturi to form a suspended bed layer, and after the reaction product is discharged from the reaction bed 11, it enters the first bag dust collector 4 through the return air pipe 6 and the fixed cover 8, and then enters the cyclone separator 2. After the cyclone separator 2 is subjected to gas-solid separation + bag dust removal, the solid phase falls into the first return bin 3 at the bottom, and the gas is discharged from the top of the flue gas exhaust pipe 12 through the exhaust mechanism;

[0031] The gas generated by the reaction of the reaction products will enter the return air pipe 6 through the outlet pipe 5 and the second bag filter 7, and then be discharged into the air through the flue gas exhaust pipe 12;

[0032] After the reaction, the motor 26 is turned on to rotate the screw body 27, and the screw nut 28 moves along the side wall of the screw body 27, which drives the detection piece 30 to move to the central area of ​​the smoke exhaust pipe 12. The detection piece 30 can absorb part of the smoke discharged upward from the smoke exhaust pipe 12. When the detection piece 30 is taken out from the inner wall of the groove 29, the smoke component detector 16 can be used to quickly detect the detection piece 30;

[0033] The waste material is then returned to the reaction bed 11 through the return mechanism. After the waste material under test is placed inside the second return bin 20, the blower 21 is threadedly installed on the upper inner wall of the second return bin 20. The blower 21 is turned on to form a downward wind force to blow the waste material in the second return bin 20 into the feed bin 9 through the return pipe 23, and then reaches the reaction bed 11 through the thermocouple 10 for continued cyclic reaction.

[0034] During the detection process, the mass flow display 15 can be used to display the flue gas mass flow value in the reaction bed 11, and the flue gas component detector 16 can be turned on to quickly detect the captured flue gas components.

Claims

1. The semi-dry desulfurization test device of the circulating fluidized bed is characterized by: The invention comprises a bottom plate (1), a cyclone separator (2) is arranged at the upper end of the bottom plate (1), a first return bin (3) is threadedly mounted on the inner wall of the discharge end of the cyclone separator (2), a first bag dust collector (4) is fixedly connected to the gas outlet end of the cyclone separator (2), a feed bin (9) is fixedly connected to the upper end of the bottom plate (1), a thermocouple (10) is fixedly connected to the upper end of the feed bin (9), a reaction bed (11) is fixedly connected to the upper end of the thermocouple (10), a flue gas exhaust pipe (12) is fixedly connected to the upper end of the reaction bed (11), and the flue gas exhaust pipe (12) is fixedly connected to the upper end of the reaction bed (11). A collection box (13) is provided on the upper surface of the first bag dust collector (4), a sampling mechanism is provided on the collection box (13), a material return mechanism and a smoke exhaust mechanism are provided on the side wall of the feed bin (9), a detection mechanism is also provided on the upper end of the bottom plate (1), a return air pipe (6) is fixedly connected to the side wall of the smoke exhaust pipe (12), a fixed cover (8) is connected to the side wall pipe of the return air pipe (6), the lower end of the fixed cover (8) is fixedly connected to the upper end of the first bag dust collector (4), a venturi device is provided in the reaction bed (11), and an exhaust mechanism is provided on the side wall of the cyclone separator (2).

2. The semi-dry desulfurization test device for a circulating fluidized bed according to claim 1, characterized in that: The exhaust mechanism comprises an air outlet pipe (5) and a second bag dust collector (7); the other gas outlet end of the side wall of the cyclone separator (2) is fixedly connected to the air outlet pipe (5), the upper end of the air outlet pipe (5) is equipped with the second bag dust collector (7), and the upper end of the second bag dust collector (7) is fixedly connected to the lower end of the return air pipe (6).

3. The semi-dry desulfurization test device for a circulating fluidized bed according to claim 1, characterized in that: The material return mechanism comprises a second material return bin (20), a blower (21), a sealing cover (22), a material return pipe (23) and an electric valve (24); the second material return bin (20) is fixedly connected to the upper end of the bottom plate (1); the blower (21) is threadedly mounted on the inner wall of the upper end of the second material return bin (20); the sealing cover (22) is fixedly connected to the upper end of the blower (21); one end of the material return pipe (23) is fixedly connected to the lower part of the side wall of the second material return bin (20); the other end of the material return pipe (23) passes through the side wall of the feed bin (9) and extends to the inner wall of the feed bin (9); the electric valve (24) is fixedly arranged on the material return pipe (23); and the air outlet port of the blower (21) faces downward.

4. The semi-dry desulfurization test device for a circulating fluidized bed according to claim 1, characterized in that: The smoke exhaust mechanism comprises a smoke inlet pipe (17), a smoke fan (18) and a heater (19); one end of the smoke inlet pipe (17) is fixedly connected to the side wall of the feed bin (9) in a penetrating manner, the other end of the smoke inlet pipe (17) is fixedly connected to the smoke fan (18), and the side wall of the smoke inlet pipe (17) is fixedly connected to the heater (19).

5. The semi-dry desulfurization test device for a circulating fluidized bed according to claim 1, characterized in that: The detection mechanism comprises a fixed platform (14), a mass flow display (15) and a smoke component detector (16); the upper end of the bottom plate (1) is fixedly connected to the fixed platform (14), and the upper end of the fixed platform (14) is fixedly connected to the mass flow display (15) and the smoke component detector (16).

6. The semi-dry desulfurization test device for a circulating fluidized bed according to claim 1, characterized in that: The sampling mechanism comprises a U-shaped block (25), a motor (26), a screw body (27), a screw nut (28) and a detection sheet (30); one end of the collection box (13) away from the center of the smoke exhaust pipe (12) is frame-shaped, the end of the collection box (13) away from the smoke exhaust pipe (12) is fixedly connected to the U-shaped block (25), the end of the U-shaped block (25) away from the smoke exhaust pipe (12) is fixedly connected to the motor (26), the output shaft of the motor (26) passes through the U-shaped block (25) and is fixedly connected to the screw body (27), the outer wall of the screw body (27) is threadedly mounted with a screw nut (28), the side wall of the screw nut (28) is provided with evenly distributed grooves (29), and the inner wall of the groove (29) is mounted with a detection sheet (30) via bolts.

7. The semi-dry desulfurization testing device for a circulating fluidized bed according to claim 1, characterized in that: The collection box (13) and the air return pipe (6) correspond to each other, and the inner wall of one end of the air return pipe (6) close to the smoke exhaust pipe (12) is flush with the outer wall of the screw body (27).

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