Dry desulfurization dust pretreatment equipment

Abstract

The utility model discloses dust pretreatment equipment for dry desulfurization, and belongs to the technical field of dry desulfurization. Comprising a dust removal box which is internally provided with a filter plate; two filter screens are arranged on the filter plate, one filter screen is located in the dust removal box, and the other filter screen is located outside the dust removal box; a fixed box is fixedly arranged on the dust removal box, and a moving structure fixedly connected with the filter plate is arranged in the fixed box; a supporting plate is fixedly arranged on the dust removal box, and a cleaning nozzle is arranged on the supporting plate; a water storage tank is fixedly arranged below the dust removal box, and a cleaning structure connected with the cleaning nozzle is arranged in the water storage tank. The two filter screens are arranged on one filter plate, and the filter plate can be driven to slide in the dust removal box by utilizing the moving structure, so that the filter screens can be quickly replaced under the condition that the dust removal box is not disassembled, the replacement efficiency is high, the pretreatment process does not need to be suspended, and meanwhile, waste gas containing sulfur dioxide in the dust removal box cannot flow out.

Description

Technical Field

[0001] The utility model provides dry desulfurization dust pretreatment equipment, belonging to the technical field of dry desulfurization. Background Art

[0002] Dry desulfurization is a method for removing sulfur dioxide from coal-fired exhaust gas. Compared with traditional wet desulfurization, dry desulfurization usually uses limestone or gypsum as raw materials. In the dry desulfurization process, limestone or gypsum is sprayed into the flue gas and reacts chemically with sulfur dioxide in the flue gas to produce calcium sulfate or gypsum, thereby removing sulfur dioxide without using water or generating wastewater, and has high applicability.

[0003] During the desulfurization process of coal-fired exhaust gas, since there are still a lot of dust impurities in the exhaust gas itself, the presence of dust and other impurities will affect the efficiency and performance of the dry desulfurization system. It is often necessary to add additional dust pretreatment equipment before the desulfurization equipment to filter out most of the dust in order to protect the normal operation of subsequent equipment and improve the desulfurization efficiency.

[0004] When pre-treating dust in exhaust gas that needs to be desulfurized, a filter is often used to filter out most of the larger dust particles. The filter needs to be replaced or cleaned after a period of use. At this time, exhaust gas containing sulfur dioxide often remains in the filter box. If the pre-treatment device is directly opened to clean and replace the filter structure, it is easy to cause the exhaust gas to spread, and the replacement process is also troublesome, which often delays the dust pre-treatment process. Utility Model Content

[0005] The technical problem to be solved by the utility model is that when pre-treating and filtering dust in waste gas, cleaning and replacing the filter screen often delays the pre-treatment process and easily causes the diffusion of waste gas containing sulfur dioxide in the pre-treatment structure.

[0006] In order to solve the above problems, the utility model proposes the following technical solutions: a dry desulfurization dust pretreatment device, comprising a dust removal box, an inlet pipe and an outlet pipe are respectively arranged on both sides of the dust removal box, and a filter plate is arranged in the dust removal box; two filter screens are arranged on the filter plate, one of which is located in the dust removal box, and the other is located outside the dust removal box; a fixed box is fixedly arranged on the dust removal box, and a movable structure fixedly connected to the filter plate is arranged in the fixed box; a support plate is fixedly arranged on the dust removal box, and a cleaning nozzle is arranged on the support plate; a water storage tank is fixedly arranged below the dust removal box, and a cleaning structure connected to the cleaning nozzle is arranged in the water storage tank.

[0007] As an improvement, the movable structure includes a movable block and a connecting rod; a guide groove connected to the dust removal box is opened at the bottom of the fixed box, and the connecting rod is located in the guide groove, one end of the connecting rod is fixedly connected to the movable block, and the other end of the connecting rod is fixedly connected to the filter plate.

[0008] As an improvement, a motor is provided at one side of the fixed box, a screw rod rotatably provided in the fixed box is fixedly connected to the output shaft of the motor, and the moving block is threadedly connected to the screw rod.

[0009] As an improvement, the cleaning structure includes a water pump and a cleaning pipe; the water pump is located in a water storage tank, one end of the cleaning pipe is connected to the water pump, and the other end is connected to the cleaning nozzle.

[0010] As an improvement, the support plate and the cleaning nozzles on the support plate are provided with two groups, both groups of cleaning nozzles are connected to the cleaning pipe, and the cleaning pipe is provided with two electrically controlled valves that can control the operation of the two groups of cleaning nozzles respectively.

[0011] As an improvement, the water tank is a coverless frame structure, and the filter plate is located directly above the water tank; a wastewater filter membrane is arranged in the water tank.

[0012] Beneficial effects of the utility model:

[0013] There are two filters on the filter plate, one of which is located in the dust removal box, and the other is located outside the dust removal box. A movable structure fixedly connected to the filter plate is provided in the fixed box; the movable structure can drive the filter plate to slide in the dust removal box, so that the filter can be quickly replaced without disassembling the dust removal box, with high replacement efficiency, without suspending the pretreatment process, and at the same time, the exhaust gas containing sulfur dioxide in the dust removal box will not flow out. At the same time, the cleaning nozzle on the support plate can rinse the replaced filter to ensure the normal use of the filter next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereoscopic diagram of a dry desulfurization dust pretreatment device of the utility model.

[0015] Figure 2 This is a stereoscopic diagram from another perspective of the dry desulfurization dust pretreatment equipment of the utility model.

[0016] Figure 3 It is a rear view of a dry desulfurization dust pretreatment device of the utility model.

[0017] Figure 4 It is a cross-sectional view of a dust removal box and a fixed box of a dry desulfurization dust pretreatment device of the utility model.

[0018] Figure 5It is a cross-sectional view of a water storage tank of a dry desulfurization dust pretreatment device of the utility model.

[0019] 1. Water storage tank; 2. Outflow pipe; 3. Dust removal box; 4. Fixed box; 5. Filter plate; 6. Inflow pipe; 7. Support plate; 8. Cleaning nozzle; 9. Cleaning pipe; 10. Guide groove; 11. Screw rod; 12. Moving block; 13. Motor; 14. Wastewater filter membrane; 15. Water pump. DETAILED DESCRIPTION

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

[0021] according to Figure 1-5 As shown: the utility model provides a dry flue gas desulfurization dust pretreatment equipment: it includes a dust removal box 3, an inlet pipe 6 and an outlet pipe 2 are respectively arranged on both sides of the dust removal box 3, and a filter plate 5 is arranged in the dust removal box 3; two filter screens are arranged on the filter plate 5, one of which is located in the dust removal box 3, and the other filter screen is located outside the dust removal box 3; a fixed box 4 is fixedly arranged on the dust removal box 3, and a movable structure fixedly connected to the filter plate 5 is arranged in the fixed box 4; a support plate 7 is fixedly arranged on the dust removal box 3, and a cleaning nozzle 8 is arranged on the support plate 7; a water storage tank 1 is fixedly arranged below the dust removal box 3, and a cleaning structure connected to the cleaning nozzle 8 is arranged in the water storage tank 1.

[0022] The present application arranges two filter screens on a filter plate 5, and utilizes a movable structure to drive the filter plate 5 to slide in the dust removal box 3, so that the filter screens can be quickly replaced without disassembling the dust removal box 3. The replacement efficiency is high, and there is no need to suspend the pretreatment process. At the same time, the exhaust gas containing sulfur dioxide in the dust removal box 3 will not flow out.

[0023] The moving structure includes a moving block 12 and a connecting rod; a guide groove 10 connected to the dust removal box 3 is provided at the bottom of the fixed box 4, and the connecting rod is located in the guide groove 10, one end of the connecting rod is fixedly connected to the moving block 12, and the other end of the connecting rod is fixedly connected to the filter plate 5. A motor 13 is provided on one side of the fixed box 4, and a screw rod 11 rotatably provided in the fixed box 4 is fixedly connected to the output shaft of the motor 13, and the moving block 12 is threadedly connected to the screw rod 11.

[0024] The arrangement of the guide groove 10 and the connecting rod can limit the rotation of the moving block 12 , thereby converting the rotation of the screw rod 11 into the movement of the moving block 12 , and transmitting the movement to the filter plate 5 through the connecting rod.

[0025] The cleaning structure includes a water pump 15 and a cleaning pipe 9; the water pump 15 is located in the water storage tank 1, one end of the cleaning pipe 9 is connected to the water pump 15, and the other end is connected to the cleaning nozzle 8. The support plate 7 and the cleaning nozzle 8 on the support plate 7 are provided with two groups, both groups of cleaning nozzles 8 are connected to the cleaning pipe 9, and the cleaning pipe 9 is provided with two electric control valves that can control the operation of the two groups of cleaning nozzles 8 respectively.

[0026] The two groups of cleaning nozzles 8 can correspond to two filter screens respectively. The two groups of cleaning nozzles 8 can be controlled by the electric control valve to work separately, so that the replaced filter screens can be cleaned, so that the two filter screens can be used alternately and repeatedly.

[0027] The water tank 1 is a coverless frame structure, and the filter plate 5 is located directly above the water tank 1 ; a wastewater filter membrane 14 is arranged in the water tank 1 .

[0028] The cleaned wastewater can directly fall into the water storage tank 1, and the wastewater filter membrane 14 can filter and recycle the wastewater used to clean the filter screen, thereby saving water resources.

[0029] Principle of the utility model

[0030] like Figure 1-3 In the normal working state diagram of this application, the exhaust gas containing sulfur dioxide enters the dust removal box 3 through the inlet pipe 6, and after filtering out most of the dust through the filter screen on the filter plate 5, it flows to the next process for desulfurization through the outlet pipe 2. After a period of time, a lot of dust particles accumulate on the filter screen. In order to ensure the normal filtering effect, the filter screen often needs to be cleaned. Figure 4 As shown, the motor 13 is started, and driven by the moving block 12, the filter plate 5 slides in the dust removal box 3, and the filter originally located in the dust removal box 3 comes out, and the filter originally located outside the dust removal box 3 enters the dust removal box 3 to replace the old filter. Therefore, the filter can be replaced quickly, and the pretreatment process does not need to be suspended, which can ensure the normal operation of the pretreatment; most importantly, the dust removal box 3 does not need to be opened, which avoids the leakage of sulfur dioxide exhaust gas contained in the dust removal box 3.

[0031] like Figure 5 As shown, the water pump 15 is started, and the electric control valve corresponding to the filter screen just replaced is opened at the same time, and the replaced filter screen is cleaned by the cleaning nozzle 8, and the replaced filter screen is cleaned and dried and waits for the next replacement. At the same time, the cleaned waste water is filtered by the waste water filter membrane 14 and then re-enters the water storage tank 1, thereby completing the water cycle and avoiding the waste of water resources.

[0032] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A dry desulfurization dust pretreatment device, comprising a dust removal box (3), wherein an inlet pipe (6) and an outlet pipe (2) are respectively arranged on both sides of the dust removal box (3), and a filter plate (5) is arranged in the dust removal box (3); characterized in that: The filter plate (5) is provided with two filter screens, one of which is located inside the dust removal box (3) and the other is located outside the dust removal box (3); a fixed box (4) is fixedly provided on the dust removal box (3), and a movable structure fixedly connected to the filter plate (5) is provided inside the fixed box (4); a support plate (7) is fixedly provided on the dust removal box (3), and a cleaning nozzle (8) is provided on the support plate (7); a water storage tank (1) is fixedly provided below the dust removal box (3), and a cleaning structure connected to the cleaning nozzle (8) is provided inside the water storage tank (1).

2. A dry desulfurization dust pretreatment equipment according to claim 1, characterized in that: The movable structure comprises a movable block (12) and a connecting rod; a guide groove (10) connected to the dust removal box (3) is provided at the bottom of the fixed box (4); the connecting rod is located in the guide groove (10); one end of the connecting rod is fixedly connected to the movable block (12); and the other end of the connecting rod is fixedly connected to the filter plate (5).

3. A dry desulfurization dust pretreatment equipment according to claim 2, characterized in that: A motor (13) is arranged on one side of the fixed box (4); a screw rod (11) rotatably arranged in the fixed box (4) is fixedly connected to the output shaft of the motor (13); and the moving block (12) is threadedly connected to the screw rod (11).

4. The dry desulfurization dust pretreatment equipment according to claim 1 is characterized in that: The cleaning structure comprises a water pump (15) and a cleaning pipe (9); the water pump (15) is located in the water storage tank (1); one end of the cleaning pipe (9) is connected to the water pump (15) and the other end is connected to the cleaning nozzle (8).

5. A dry desulfurization dust pretreatment equipment according to claim 4, characterized in that: The support plate (7) and the cleaning nozzles (8) on the support plate (7) are provided with two groups, the two groups of cleaning nozzles (8) are both connected to the cleaning pipe (9), and the cleaning pipe (9) is provided with two electric control valves capable of respectively controlling the operation of the two groups of cleaning nozzles (8).

6. The dry desulfurization dust pretreatment equipment according to claim 1 is characterized in that: The water storage tank (1) is a coverless frame structure, and the filter plate (5) is located directly above the water storage tank (1); a wastewater filter membrane (14) is arranged in the water storage tank (1).

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