Desulfurization slurry circulating pump

Abstract

The utility model discloses a desulfurization slurry circulating pump relates to circulating pump technical field, including circulating pump main part, the outlet of circulating pump main part is fixedly connected with connecting piece no.

Description

Technical Field

[0001] This utility model relates to the field of circulating pump technology, and in particular to a desulfurization slurry circulating pump. Background Technology

[0002] Currently, coal-fired power units generally adopt wet desulfurization, adjusting the number of slurry circulation pumps in operation based on the SO2 emission concentration in the flue gas. The desulfurization principle involves using limestone slurry to spray the flue gas at the boiler tail end in a counter-current manner, thereby purifying the flue gas to meet environmental emission requirements.

[0003] During the period of low load and low sulfur content operation of the unit, the concentration of SO2 in the raw flue gas is relatively low. Even with the minimum number of slurry circulation pumps in operation, there is still a large allowable emission margin. Moreover, the SO2 emission value of the clean flue gas often remains at or close to 0 for a long time. The existing desulfurization plant's circulation pump operation mode has a high power consumption rate, which cannot meet the energy conservation and emission reduction requirements. Utility Model Content

[0004] The purpose of this invention is to address the problems in the existing technology where the SO2 emission value of the clean flue gas often remains at or close to 0 for a long time, and the existing desulfurization plant's circulating pump operation mode has a high power consumption rate, which cannot meet the requirements of energy conservation and emission reduction. Therefore, a desulfurization slurry circulating pump is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a desulfurization slurry circulation pump, comprising a circulation pump body, wherein a connecting component is fixedly connected to the outlet of the circulation pump body, and a connecting mechanism is provided at the bottom of the connecting component. The connecting mechanism includes a connecting pipe, a base, and a sleeve. A support plate is fixedly connected to the top of the base, and the top of the support plate is fixedly connected to the circulation pump body. A positioning plate and a plug-in plate are fixedly connected to both sides of the base, and the positioning plate and the plug-in plate are slidably connected. One end of the sleeve is fixedly connected to the base, and a guide rod is inserted into the sleeve. One end of the guide rod is fixedly connected to the base. The connecting pipe is located on the top of the base, and one end of the connecting pipe is connected to the connecting component through a connecting flange.

[0006] Preferably, both the positioning plate and the plug-in plate have positioning holes on their tops, and limit pins are inserted into the positioning holes.

[0007] Preferably, a one-way valve is bolted to the feed inlet of the circulating pump body, and a filter element is fixedly connected to one end of the one-way valve.

[0008] Preferably, a filter screen is fitted into the inner wall of the filter element, and a flushing pipe is provided on one side of the filter screen. The flushing pipe is L-shaped, and the end of the flushing pipe penetrates through the side wall of the filter element.

[0009] Preferably, the bottom of the filter element is fixedly connected to two drain pipes, which are located on both sides of the filter screen.

[0010] Preferably, one end of the filter element is fixedly connected to a mounting flange, and a one-way valve is bolted to the mounting flange.

[0011] Preferably, one end of the one-way valve is fixedly connected to a connecting component two, and one end of the connecting component two is connected to a connecting pipe two via a connecting flange.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the positioning plate and the plug-in plate are slidably connected, and the guide rod is plugged into the sleeve. The plug-in plate is inserted into the positioning plate, and the plug-in plate is moved to align the positioning holes on the plug-in plate and the positioning plate. The plug-in plate and the guide rod can guide the splicing of the two bases. The two bases are used together to facilitate changing the operation mode and number of circulating pumps according to the site conditions, reducing the operating current, reducing the power consumption rate, and meeting the requirements of energy conservation and emission reduction.

[0013] 2. In this utility model, the filter screen is engaged with the inner wall of the filter element, the top of the drain pipe is connected to the filter element, and water is discharged from the end of the flushing pipe to flush one side of the filter screen, reducing the residue of impurities on the surface of the filter screen. The drain pipe accelerates the discharge of impurities and sewage. One-way valve one and one-way valve two control the flow direction of sewage. The cleaning of the filter screen ensures the effectiveness of the filter screen and prevents impurities from entering the base and causing blockage and damage to the base. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of the desulfurization slurry circulation pump is provided for this utility model; Figure 2 This utility model provides a schematic diagram of the installation of a one-way valve for a desulfurization slurry circulation pump. Figure 3 A cross-sectional schematic diagram of the filter element structure of the desulfurization slurry circulation pump proposed in this utility model; Figure 4 This utility model provides a schematic diagram of the installation of the plug plate structure for the desulfurization slurry circulation pump.

[0015] Legend: 1. Connector 1; 2. Connecting pipe 1; 3. Circulating pump body; 4. Connector 2; 5. Connecting pipe 2; 6. Filter element; 7. One-way valve 1; 8. Flushing pipe; 9. Filter screen; 10. Mounting flange; 11. Drain pipe; 12. One-way valve 2; 13. Base; 14. Positioning plate; 15. Sleeve; 16. Support plate; 17. Insert plate; 18. Guide rod. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1: Refer to Figures 1-4 As shown: A desulfurization slurry circulation pump includes a circulation pump body 3. The outlet of the circulation pump body 3 is fixedly connected to a connector 1. A connecting mechanism is provided at the bottom of the connector 1. The connecting mechanism includes a connecting pipe 2, a base 13, and a sleeve 15. A support plate 16 is fixedly connected to the top of the base 13. The top of the support plate 16 is fixedly connected to the circulation pump body 3. A positioning plate 14 and a plug-in plate 17 are fixedly connected to both sides of the base 13, respectively. The positioning plate 14 and the plug-in plate 17 are slidably connected. One end of the sleeve 15 is fixedly connected to the base 13. A guide rod 18 is inserted into the sleeve 15. One end of the guide rod 18 is fixedly connected to the base 13. The connecting pipe 2 is located on the top of the base 13, and one end of the connecting pipe 2 is connected to the connector 1 through a connecting flange. Positioning holes are opened on the top of the positioning plate 14 and the plug-in plate 17, and limit pins are inserted into the positioning holes.

[0019] The circulating pump body 3 is fixed to the base 13 by the support plate 16. The combination of the support plate 16 and the base 13 has strong stability and can effectively fix the circulating pump body 3 to prevent shaking during operation. After the positioning plates 14 on both sides of the base 13 slide and engage with the plug plate 17, the limit pin is inserted to lock the position, making the base 13 easy to install and position, and flexible to disassemble and use. The sleeve 15 and the guide rod 18 are plugged into each other to help the base 13 maintain stable positioning. The connecting part 1 at the outlet of the circulating pump body 3 is connected to the connecting pipe 2 through the connecting flange to realize the transportation of slurry. The sleeve 15 and the guide rod 18 improve the positioning accuracy of the base 13 and ensure the sealing of the connection between the connecting part 1 and the connecting pipe 2.

[0020] Example 2: Figures 1-3 As shown, a one-way valve 12 is bolted to the feed inlet of the circulating pump body 3. One end of the one-way valve 12 is fixedly connected to a filter element 6. A filter screen 9 is fitted into the inner wall of the filter element 6. A flushing pipe 8 is provided on one side of the filter screen 9. The flushing pipe 8 is L-shaped and its end penetrates the side wall of the filter element 6. Two drain pipes 11 are fixedly connected to the bottom of the filter element 6. The drain pipes 11 are located on both sides of the filter screen 9. A mounting flange 10 is fixedly connected to one end of the filter element 6. A one-way valve 7 is bolted to the mounting flange 10. A connector 4 is fixedly connected to one end of the one-way valve 7. A connector 5 is connected to one end of the connector 4 through a connecting flange.

[0021] The slurry enters the connecting part 4 through the connecting pipe 2 5, and flows into the filter element 6 after passing through the one-way valve 1 7. The filter screen 9 inside the filter element 6 filters impurities in the slurry, reducing internal wear of the circulating pump body 3 and extending the service life of the equipment. The flushing pipe 8 can flush and clean the filter screen 9. The filtered slurry enters the circulating pump body 3 through the one-way valve 2 12. The drain pipes 11 on both sides of the filter screen 9 are used to discharge filtered impurities and flushing wastewater. The cooperation between the flushing pipe 8 and the drain pipe 11 allows for online cleaning of the filter screen 9 without disassembling the filter element 6, resulting in high maintenance efficiency. The one-way valve 1 7 and the one-way valve 2 12 prevent slurry backflow, ensuring the one-way stability of slurry delivery and avoiding damage from idling. The mounting flange 10 achieves a stable connection between the filter element 6 and the one-way valve 1 7. The bolt connection method facilitates disassembly and maintenance.

[0022] The usage method and working principle of this device are as follows: First, select one or two slurry circulation pumps in the absorption tower and change them from the power frequency operation mode to the variable frequency operation mode. The operation mode can be one variable frequency pump plus one or two power frequency pumps. The two variable frequency circulation pumps can be operated in either variable frequency or power frequency mode. The specific operation mode is determined according to the actual site conditions. When two circulating pumps are needed, the bases 13 at the bottom of the two bases 13 are spliced ​​together, so that the plug plate 17 on one side of one base 13 is inserted into the positioning plate 14 of the other base 13. At this time, the guide rod 18 is inserted into the sleeve 15. Then, the limiting pin is inserted into the positioning hole of the positioning plate 14 and the plug plate 17 for fixation. The connecting pipe 2 is installed between the two connecting parts 1 and 4, and the connecting pipe 5 is installed between the two connecting parts 4. The two bases 13 can be used in combination. The material enters the filter element 6 through the connecting part 4, is filtered by the filter screen 9, and then enters the circulating pump body 3. When it is necessary to rinse the filter screen 9 inside the filter element 6, the one-way valve 7 and one-way valve 12 on both sides of the filter element 6 are closed. At this time, the rinsing pipe 8 is connected to the water source, and water is sprayed out from the end of the rinsing pipe 8 to rinse one side of the filter screen 9. Wastewater and impurities can be discharged from the bottom of the drain pipe 11.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A desulfurization slurry circulation pump, comprising a circulation pump body (3), characterized in that: The discharge port of the circulating pump body (3) is fixedly connected to a connector (1). The bottom of the connector (1) is provided with a connecting mechanism, which includes a connecting pipe (2), a base (13) and a sleeve (15). A support plate (16) is fixedly connected to the top of the base (13). The top of the support plate (16) is fixedly connected to the circulating pump body (3). A positioning plate (14) and a plug plate (17) are fixedly connected to both sides of the base (13). The positioning plate (14) and the plug plate (17) are slidably connected. One end of the sleeve (15) is fixedly connected to the base (13). A guide rod (18) is inserted inside the sleeve (15). One end of the guide rod (18) is fixedly connected to the base (13).

2. The desulfurization slurry circulation pump according to claim 1, characterized in that: The top of both the positioning plate (14) and the plug-in plate (17) are provided with positioning holes, and limit pins are inserted into the positioning holes.

3. The desulfurization slurry circulation pump according to claim 1, characterized in that: The feed inlet of the circulating pump body (3) is fitted with a one-way valve (12) by bolts.

4. The desulfurization slurry circulation pump according to claim 3, characterized in that: A filter screen (9) is fitted into the inner wall of the filter element (6). A flushing pipe (8) is provided on one side of the filter screen (9). The flushing pipe (8) is L-shaped and its end penetrates the side wall of the filter element (6).

5. The desulfurization slurry circulation pump according to claim 4, characterized in that: The bottom of the filter element (6) is fixedly connected to two drain pipes (11).

6. The desulfurization slurry circulation pump according to claim 5, characterized in that: The filter element (6) is fixedly connected to a mounting flange (10) at one end, and a one-way valve (7) is bolted to the mounting flange (10).

7. The desulfurization slurry circulation pump according to claim 6, characterized in that: One end of the one-way valve (7) is fixedly connected to the connector (4), and one end of the connector (4) is connected to the connecting pipe (5) through the connecting flange.

8. The desulfurization slurry circulation pump according to claim 5, characterized in that: The drain pipe (11) is located on both sides of the filter screen (9).

9. The desulfurization slurry circulation pump according to claim 3, characterized in that: One end of the one-way valve (12) is fixedly connected to a filter element (6).

10. The desulfurization slurry circulation pump according to claim 1, characterized in that: The connecting pipe 1 (2) is located on the top of the base (13), and one end of the connecting pipe 1 (2) is connected to the connecting piece 1 (1) through a connecting flange.

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