Circulating double-feeding dry desulfurization device

Abstract

The utility model discloses a circulating double-feeding dry desulfurization device which comprises a desulfurization tower, an arc-shaped hopper is fixedly arranged on the inner wall of a connecting pipe and located at the lower edge of one butt joint pipe, an exhaust hole is formed in the middle of the top end of the connecting pipe, and a first filter screen is fixedly arranged on the inner wall of the exhaust hole; an arc-shaped baffle is fixedly arranged on the inner wall of the connecting pipe at the edge of the exhaust hole, and a guide pipe is inserted into one side of the top end of the desulfurizing tower. According to the device, sulfur-containing gas with catalyst particles passes through the arc-shaped baffle in the flowing process, enters the inner side of the arc-shaped baffle and continuously impacts the exhaust holes, the gas enters the guide pipe through the first filter screen, and the catalyst particles fall on the arc-shaped hopper at the lower end after being intercepted by the first filter screen; and the gas is introduced into the desulfurization tower through the arc-shaped hopper to react with sulfur-containing gas secondarily entering from the upper end and flue gas newly entering from the lower end, so that double-feeding repeated contact reaction is realized, and the desulfurization quality of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry desulfurization, in particular to a circulating double-feeding dry desulfurization device. Background Art

[0002] Dry desulfurization, also known as dry flue gas desulfurization, refers to the use of powdered or granular absorbents, adsorbents or catalysts to remove sulfide-containing gases from flue gas. With the development of modern technology, the functions of desulfurization towers used in dry desulfurization are constantly increasing, so that the desulfurization tower can purify the sulfur-containing substances and gases in the flue gas to the greatest extent during flue gas desulfurization.

[0003] In view of this, Chinese Patent No. CN213433781U proposes a circulating double-feed dry desulfurization device, which solves the technical problems of bed collapse accidents in existing desulfurization processes, desulfurizer slab blockage, large system resistance, low desulfurization efficiency, etc. However, in the above technical scheme, for the secondary desulfurization method of cyclic repeated contact, it only supports the secondary feeding of unreacted catalyst to react with new flue gas, and the flue gas that has not been thoroughly purified cannot be circulated and will be discharged together with the gas generated by the reaction, which will still cause air pollution, thereby reducing the desulfurization quality of the device. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a circulating double-feed dry desulfurization device to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model proposes a circulating double-feed dry desulfurization device, comprising a desulfurization tower, a double-feed contact reaction desulfurization mechanism is arranged at the upper end of the desulfurization tower, and a separation mechanism for automatic impurity collection is arranged inside the desulfurization tower;

[0006] The dual-feed contact reaction desulfurization mechanism includes butt joints inserted through the upper and lower ends of one side of the desulfurization tower, a connecting pipe is fixedly provided at one end of the two butt joints, an arc-shaped hopper is fixedly provided on the inner wall of the connecting pipe at the lower edge of one of the butt joints, an exhaust hole is opened in the middle position of the top of the connecting pipe, a first filter is fixedly provided on the inner wall of the exhaust hole, an arc-shaped baffle is fixedly provided on the inner wall of the connecting pipe at the edge of the exhaust hole, a conduit is inserted through one side of the top of the desulfurization tower, and one end of the conduit is fixedly connected to the top of the connecting pipe, the inner wall of the conduit is communicated with the inner wall of the exhaust hole, and a catalyst inlet pipe is inserted through the middle position of the top of the desulfurization tower.

[0007] In one example, the automatic impurity collection separation mechanism includes a screen fixed to the lower end of the inner wall of the desulfurization tower, a turntable is rotatably provided in the middle position of the lower end of the inner wall of the desulfurization tower, a scraper is fixed on one side of the turntable, and the bottom of the scraper is in contact with the top of the screen.

[0008] In one example, a first motor is fixedly installed on the inner wall of the desulfurization tower, and one end of the turntable passes through the inner wall of the desulfurization tower and is fixedly connected to the output end of the first motor, a leakage groove is opened on one side of the top of the screen, and a discharge hole is opened at the bottom of the inner wall of the leakage groove, a sealing cover is inserted into the inner wall of the discharge hole, and the outer wall of the sealing cover is threadedly connected to the inner wall of the discharge hole.

[0009] In one example, a rotating shaft is inserted into the inner wall of the desulfurization tower at the upper end of the turntable, a stirring impeller is fixedly provided at the middle position of the outer wall of the rotating shaft, a second motor is fixedly provided on the outer wall of the desulfurization tower, and one end of the rotating shaft is fixedly connected to the output end of the second motor, an exhaust pipe is inserted into one side of the outer wall of the desulfurization tower at the lower end of one of the docking pipes, and an induced draft fan is fixedly provided at one end of the exhaust pipe.

[0010] In one example, a dust removal box is fixedly provided on one side of the desulfurization tower, an air intake pipe is inserted through one side of the dust removal box, a boiler is fixedly provided at one end of the air intake pipe, and a second filter is fixedly provided at the upper end of the inner wall of the dust removal box.

[0011] In one example, a switch panel is fixedly provided on one side of the desulfurization tower, and the first motor, the second motor and the induced draft fan are electrically connected to an external power supply through the switch panel.

[0012] The circulating double-feeding dry desulfurization device proposed by the utility model can bring the following beneficial effects:

[0013] 1. In a circulating double-feed dry desulfurization device, unreacted catalyst and sulfur-containing gas enter the connecting pipe through the butt joint at the lower end. The sulfur-containing gas carries the catalyst particles through the arc baffle during the flow and enters the inner side of the arc baffle, continuously impacting the exhaust hole. The gas enters the conduit through the first filter and enters the upper end of the desulfurization tower through the conduit. The catalyst particles are intercepted by the first filter and fall on the arc hopper at the lower end. They enter the butt joint at the upper end through the arc hopper and are introduced into the desulfurization tower to react with the sulfur-containing gas entering the upper end for the second time and the flue gas entering the lower end, thereby realizing double-feed repeated contact reaction, which can make the catalyst react with the flue gas more thoroughly and improve the desulfurization quality of the device.

[0014] 2. In this circulating double-feed dry desulfurization device, solid particles generated by the reaction of the catalyst and the sulfur-containing gas fall on the screen at the lower end, and the purified gas leaks through the screen and is discharged from the desulfurization tower through the guidance of the induced draft fan on one side. After the solid particles accumulate for a period of time, the first motor is started to make the turntable with the scraper move in a circle on the upper end of the screen, and the solid impurities are uniformly scraped into the leakage groove on one side, and then the sealing cover is opened to discharge and collect them from the discharge hole, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure inside the connecting pipe of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure inside the desulfurization tower of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the stirring impeller of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of dust removal inside the dust removal box of the utility model.

[0021] In the figure: 1. desulfurization tower; 2. docking pipe; 3. connecting pipe; 4. arc hopper; 5. exhaust hole; 6. first filter; 7. arc baffle; 8. conduit; 9. catalyst inlet pipe; 10. screen; 11. turntable; 12. scraper; 13. first motor; 14. trough; 15. sealing cover; 16. rotating shaft; 17. stirring impeller; 18. second motor; 19. induced draft fan; 20. dust removal box; 21. air inlet pipe; 22. boiler; 23. second filter. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0023] The examples are as follows:

[0024] The utility model provides Figure 1-5 A circulating double-feed dry desulfurization device is shown, comprising a desulfurization tower 1, and a double-feed contact reaction desulfurization mechanism is arranged at the upper end of the desulfurization tower 1;

[0025] The double-feed contact reaction desulfurization mechanism includes a butt-joint pipe 2 inserted into the upper and lower ends of one side of the desulfurization tower 1, a connecting pipe 3 is fixedly provided at one end of the two butt-joint pipes 2, an arc hopper 4 is fixedly provided at the lower edge of one of the butt-joint pipes 2 on the inner wall of the connecting pipe 3, an exhaust hole 5 is opened in the middle position of the top of the connecting pipe 3, a first filter screen 6 is fixedly provided on the inner wall of the exhaust hole 5, an arc baffle 7 is fixedly provided on the inner wall of the connecting pipe 3 at the edge of the exhaust hole 5, a conduit 8 is inserted into one side of the top of the desulfurization tower 1, and one end of the conduit 8 is fixedly connected to the top of the connecting pipe 3, the inner wall of the conduit 8 is communicated with the inner wall of the exhaust hole 5, a catalyst inlet pipe 9 is inserted into the middle position of the top of the desulfurization tower 1, and the arc hopper 4 is tilted and fixed, and the catalyst particles will slide into the butt-joint pipe 2 when they are blocked and fall on the upper end, and the lower end of the arc baffle 7 has a larger expansion area than the upper end, so that after the gas and catalyst particles enter the upper end through the lower end and are intercepted by the first filter screen 6, the particles will fall vertically and fall on the arc hopper 4;

[0026] Furthermore, the separation mechanism for automatic impurity collection includes a screen 10 fixed to the lower end of the inner wall of the desulfurization tower 1, a turntable 11 is rotatably provided in the middle position of the lower end of the inner wall of the desulfurization tower 1, a scraper 12 is fixed on one side of the turntable 11, and the bottom of the scraper 12 is in contact with the top of the screen 10, and an exhaust pipe connected to the induced draft fan 19 is installed at the lower end of the screen 10, so that the purified gas passes through the screen 10 and is introduced into the exhaust pipe for discharge.

[0027] A first motor 13 is fixedly provided on the inner wall of the desulfurization tower 1, and one end of the turntable 11 passes through the inner wall of the desulfurization tower 1 and is fixedly connected to the output end of the first motor 13. A leakage groove 14 is provided on one side of the top of the screen 10, and a discharge hole is provided at the bottom of the inner wall of the leakage groove 14. A sealing cover 15 is inserted through the inner wall of the discharge hole, and the outer wall of the sealing cover 15 is threadedly connected to the inner wall of the discharge hole. The discharge hole is provided in a concave state, so that after impurities fall into the leakage groove 14, they will slide near the discharge hole, and then the sealing cover 15 is opened so that the impurities will be discharged from the discharge hole;

[0028] Furthermore, a rotating shaft 16 is inserted into the inner wall of the desulfurization tower 1 at the upper end of the turntable 11, a stirring impeller 17 is fixedly provided at the middle position of the outer wall of the rotating shaft 16, a second motor 18 is fixedly provided on the outer wall of the desulfurization tower 1, and one end of the rotating shaft 16 is fixedly connected to the output end of the second motor 18, an exhaust pipe is inserted into one side of the outer wall of the desulfurization tower 1 at the lower end of one of the docking pipes 2, and a draft fan 19 is fixedly provided at one end of the exhaust pipe.

[0029] A dust removal box 20 is fixedly provided on one side of the desulfurization tower 1 , an air intake pipe 21 is inserted through one side of the dust removal box 20 , a boiler 22 is fixedly provided at one end of the air intake pipe 21 , and a second filter screen 23 is fixedly provided at the upper end of the inner wall of the dust removal box 20 .

[0030] A switch panel is fixedly provided on one side of the desulfurization tower 1, and the first motor 13, the second motor 18 and the induced draft fan 19 are all electrically connected to an external power supply through the switch panel.

[0031] Working principle: When using the circulating double-feed dry desulfurization device in this design, first, the connecting pipe 3 needs to be installed on one side of the desulfurization tower 1 through two butt-joint pipes 2, and the flue gas generated in the boiler 22 is introduced into the dust removal box 20 through the air inlet pipe 21, and after dust removal through the second filter 23 therein, it is introduced into the desulfurization tower 1 for desulfurization. During desulfurization, the catalyst in the catalyst inlet pipe 9 enters and falls to react with the sulfur dioxide in the flue gas, and the reaction is more complete when the second motor 18 drives the rotating shaft 16 to rotate the stirring impeller 17. The reaction generates a large amount of heat, which increases the pressure in the desulfurization tower 1, so that the unreacted catalyst and sulfur-containing gas enter the connecting pipe 3 through the butt-joint pipe 2 at the lower end. The sulfur-containing gas carries the catalyst particles through the arc baffle 7 during the flow process, and enters the inner side of the arc baffle 7, constantly impacting the exhaust hole 5, and the gas enters the conduit 8 through the first filter 6, and It enters the upper end of the desulfurization tower 1 through the conduit 8, and the catalyst particles are intercepted by the first filter 6 and fall on the arc hopper 4 at the lower end, and enter the docking pipe 2 at the upper end through the arc hopper 4 and are introduced into the desulfurization tower 1 to react with the sulfur-containing gas entering the upper end for the second time and the flue gas entering the lower end, thereby realizing double-feeding repeated contact reaction, which can make the catalyst and the flue gas react more thoroughly and improve the desulfurization quality of the device. After the solid particles produced by the reaction of the catalyst and the sulfur-containing gas fall on the screen 10 at the lower end, the purified gas leaks through the screen 10 and is discharged from the desulfurization tower 1 through the guidance of the induced draft fan 19 on one side. After the solid particles accumulate for a period of time, the first motor 13 is started to make the turntable 11 carry the scraper 12 to make a circular motion on the upper end of the screen 10, and the solid impurities are uniformly scraped into the leakage groove 14 on one side, and then the sealing cover 15 is opened to discharge and collect them from the discharge hole, thereby improving the convenience of using the device.

[0032] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A circulating double-feed dry desulfurization device, comprising a desulfurization tower (1), characterized in that: The upper end of the desulfurization tower (1) is provided with a double-feeding contact reaction desulfurization mechanism, and the interior of the desulfurization tower (1) is provided with a separation mechanism for automatically collecting impurities; The dual-feed contact reaction desulfurization mechanism comprises a butt joint pipe (2) inserted at the upper and lower ends of one side of the desulfurization tower (1), a connecting pipe (3) is fixedly provided at one end of the two butt joint pipes (2), an arc-shaped hopper (4) is fixedly provided on the inner wall of the connecting pipe (3) at the lower edge of one of the butt joint pipes (2), an exhaust hole (5) is opened in the middle position of the top of the connecting pipe (3), a first filter screen (6) is fixedly provided on the inner wall of the exhaust hole (5), an arc-shaped baffle (7) is fixedly provided on the inner wall of the connecting pipe (3) at the edge of the exhaust hole (5), a conduit (8) is inserted at one side of the top of the desulfurization tower (1), and one end of the conduit (8) is fixedly connected to the top of the connecting pipe (3), the inner wall of the conduit (8) is communicated with the inner wall of the exhaust hole (5), and a catalyst inlet pipe (9) is inserted in the middle position of the top of the desulfurization tower (1).

2. A circulating double-feed dry desulfurization device according to claim 1, characterized in that: The automatic impurity collection separation mechanism comprises a screen (10) fixed to the lower end of the inner wall of the desulfurization tower (1), a turntable (11) is rotatably provided at the middle position of the lower end of the inner wall of the desulfurization tower (1), a scraper (12) is fixedly provided on one side of the turntable (11), and the bottom of the scraper (12) is in contact with the top of the screen (10).

3. A circulating double-feed dry desulfurization device according to claim 2, characterized in that: A first motor (13) is fixedly mounted on the inner wall of the desulfurization tower (1), and one end of the turntable (11) passes through the inner wall of the desulfurization tower (1) and is fixedly connected to the output end of the first motor (13). A leakage groove (14) is provided on one side of the top of the screen (10), and a discharge hole is provided at the bottom of the inner wall of the leakage groove (14). A sealing cover (15) is inserted through the inner wall of the discharge hole, and the outer wall of the sealing cover (15) is threadedly connected to the inner wall of the discharge hole.

4. A circulating double-feed dry desulfurization device according to claim 1, characterized in that: A rotating shaft (16) is inserted through the inner wall of the desulfurization tower (1) at the upper end of the rotating disk (11), a stirring impeller (17) is fixedly provided at the middle position of the outer wall of the rotating shaft (16), a second motor (18) is fixedly provided on the outer wall of the desulfurization tower (1), and one end of the rotating shaft (16) is fixedly connected to the output end of the second motor (18), an exhaust pipe is inserted through one side of the outer wall of the desulfurization tower (1) at the lower end of one of the butt joints (2), and an induced draft fan (19) is fixedly provided at one end of the exhaust pipe.

5. The circulating double-feed dry desulfurization device according to claim 1 is characterized in that: A dust removal box (20) is fixedly provided on one side of the desulfurization tower (1), an air intake pipe (21) is inserted through one side of the dust removal box (20), a boiler (22) is fixedly provided at one end of the air intake pipe (21), and a second filter screen (23) is fixedly provided at the upper end of the inner wall of the dust removal box (20).

6. A circulating double-feed dry desulfurization device according to claim 4, characterized in that: A switch panel is fixedly provided on one side of the desulfurization tower (1), and the first motor (13), the second motor (18) and the induced draft fan (19) are all electrically connected to an external power supply via the switch panel.

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