Slurry impurity removal device of belt conveyor

Abstract

The utility model relates to the technical field of desulfurization and impurity removal, in particular to a slurry impurity removal device of a belt conveyor. The slurry impurity removing device of the belt conveyor comprises a driving wheel, a filtering conveying belt is arranged on the driving wheel, a discharging port is formed in the filtering conveying belt, a discharging outlet is formed in one side of the driving wheel, and a first-stage rotary washing wheel and a second-stage rotary washing wheel are arranged between the discharging port and the discharging outlet. A loosening rake is arranged between the first-stage rotary washing wheel and the second-stage rotary washing wheel, a first-stage supporting frame is arranged below the first-stage rotary washing wheel, a first-stage scraping plate is arranged on the first-stage supporting frame, a first-stage impurity removing canvas is arranged on the first-stage scraping plate, and the first-stage impurity removing canvas is in contact with the filtering conveying belt. According to the device, through the arrangement of the loosening rake, black substances attached to the interior or the bottom of gypsum are also exposed, and the impurity removal efficiency is greatly improved; and through the arrangement of a scraping plate, the working efficiency of the impurity removal canvas is improved.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization and impurity removal technology, specifically to a belt conveyor slurry impurity removal device. Background Technology

[0002] The limestone-gypsum wet flue gas desulfurization (FGD) system in thermal power plants is a complex process. Its core lies in the reaction of limestone slurry with sulfur dioxide (SO2) in the flue gas to produce gypsum. In this process, gypsum formation and dehydration are critical steps, directly impacting the system's operating costs and gypsum quality. Precise vacuum control is essential for the system's proper functioning to ensure efficient gypsum dehydration.

[0003] In actual production, the black substances in the absorber slurry of the desulfurization system cause difficulties in gypsum dewatering during dewatering operations. After replacing the two large-diameter hydrocyclone settling nozzles, more water comes out, more organic black substances are carried out, more foam is generated, the water on the belt cannot be dried, the vacuum degree increases, the gypsum has low water permeability and high water content, and the vacuum pump current increases, causing difficulties for normal operation. Utility Model Content

[0004] To address the shortcomings of the existing technology, the purpose of this invention is to provide a belt conveyor slurry impurity removal device. A thick canvas is added to the belt distributor to cover the gypsum, blocking some foam and black substances. The subsequent rinsing water then dilutes some of the foam and black substances, preventing the black substances from hindering water absorption. This increases the permeability of the gypsum, thereby reducing its water content, vacuum level, and effectively lowering the current of the vacuum pump and belt conveyor, extending the equipment's service life, and reducing the chloride ion content in the filtrate and gypsum produced during dehydration.

[0005] This utility model is achieved using the following technical solution:

[0006] The belt conveyor slurry impurity removal device includes a drive wheel, a filter conveyor belt on the drive wheel, a discharge port on the filter conveyor belt, a discharge outlet on one side of the drive wheel, a primary rotary flushing wheel and a secondary rotary flushing wheel between the discharge port and the discharge outlet, a loosening rake between the primary rotary flushing wheel and the secondary rotary flushing wheel, a primary support frame below the primary rotary flushing wheel, a primary scraper on the primary support frame, a primary impurity removal canvas on the primary scraper, and the primary impurity removal canvas in contact with the filter conveyor belt.

[0007] The belt diverter is located between the primary and secondary rotary flushing wheels. The belt conveyor slurry impurity removal device also includes a vacuum system, including a vacuum pump and a belt conveyor.

[0008] A driven wheel is provided on one side of the discharge port. The driving wheel and the driven wheel together support the rotation of the filter conveyor belt. The loosening rake is equipped with rake teeth. After the black substance on the surface of the gypsum is treated by the primary impurity removal canvas, most of the black substance on the upper surface is removed. Then, after the loosening rake, the black substance attached to the inside or bottom of the gypsum is also exposed and cleaned by the secondary impurity removal canvas.

[0009] The secondary rotating washing wheel is provided with a secondary support frame below it, and a secondary impurity removal canvas is provided on the secondary rotating washing wheel. The secondary impurity removal canvas is in contact with the filter conveyor belt.

[0010] The secondary support frame is equipped with secondary scrapers. The primary scraper is located on one side of the primary cleaning canvas, and the secondary scraper is located on the other side of the secondary cleaning canvas. When there is too much black substance on the primary cleaning canvas, the primary rotating washing wheel is rotated, bringing the primary cleaning canvas closer to the primary scraper to scrape off the black substance adhering to its surface. The secondary cleaning canvas is cleaned in the same way.

[0011] A primary flushing disc is provided above the primary rotating flushing wheel, a secondary flushing disc is provided above the secondary rotating flushing wheel, and a tertiary flushing disc is provided between the secondary rotating flushing wheel and the drive wheel.

[0012] A recovery hopper is provided below the loosening rake, and a tightening roller is provided below the filter conveyor belt.

[0013] A negative pressure sealing belt is provided below the filter conveyor belt, located between the driving wheel and the driven wheel. The negative pressure sealing belt and the conveyor belt above form a sealed space, which is connected to a vacuum pump.

[0014] The working principle of this utility model is as follows:

[0015] The gypsum product falls onto the filter conveyor belt through the discharge port. The drive wheel, primary washing disc, secondary washing disc, tertiary washing disc, and vacuum pump begin operation. Most of the black material on the gypsum surface is removed after treatment by the primary cleaning canvas. Then, after being loosened by a rake, the black material adhering to the interior or bottom of the gypsum is exposed and cleaned by the secondary cleaning canvas. The gypsum then enters the next device through the discharge outlet. When there is too much black material on the primary cleaning canvas, the primary rotary washing wheel rotates, bringing the primary cleaning canvas closer to the primary scraper to scrape off the black material adhering to the surface. The belt separator is located between the primary and secondary rotary washing wheels, and the belt conveyor slurry cleaning device also includes a vacuum system.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model of belt conveyor slurry impurity removal device involves adding a thick canvas to the gypsum at the belt distributor to block some foam and black substances. The subsequent rinsing water further dilutes these substances, preventing them from hindering water absorption. This increases the gypsum's permeability, reducing its water content, vacuum level, and effectively lowering the current of the vacuum pump and belt conveyor, thus extending equipment lifespan and reducing the chloride ion content in the filtrate produced during dehydration. The loosening rake exposes black substances adhering to the interior or bottom of the gypsum, significantly improving impurity removal efficiency. The scraper further enhances the working efficiency of the impurity removal canvas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the slurry impurity removal device for belt conveyors of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the loosening rake of this utility model;

[0020] In the diagram: 1. Drive wheel; 2. Filter conveyor belt; 3. Discharge port; 4. Primary rotary flushing wheel; 5. Secondary rotary flushing wheel; 6. Primary support frame; 7. Secondary support frame; 8. Primary impurity removal canvas; 9. Secondary impurity removal canvas; 10. Primary scraper; 11. Secondary scraper; 12. Primary flushing disc; 13. Secondary flushing disc; 14. Tertiary flushing disc; 15. Loosening rake; 16. Recovery hopper; 17. Negative pressure sealing belt; 18. Tensioning roller; 19. Discharge outlet. Detailed Implementation

[0021] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 As shown, the belt conveyor slurry impurity removal device includes a drive wheel 1, a filter conveyor belt 2 mounted on the drive wheel 1, a discharge port 3 on the filter conveyor belt 2, a discharge outlet 19 on one side of the drive wheel 1, a primary rotating flushing wheel 4 and a secondary rotating flushing wheel 5 between the discharge port 3 and the discharge outlet 19, a loosening rake 15 between the primary rotating flushing wheel 4 and the secondary rotating flushing wheel 5, a primary support frame 6 below the primary rotating flushing wheel 4, a primary scraper 10 on the primary support frame 6, and a primary impurity removal canvas 8 on the primary scraper 10, which contacts the filter conveyor belt 2. The area between the primary rotating flushing wheel 4 and the secondary rotating flushing wheel 5 is a belt diverter. The belt conveyor slurry impurity removal device also includes a vacuum system, including a vacuum pump and a belt conveyor. Figure 2As shown, a driven wheel is provided on one side of the discharge port 3. The driving wheel 1 and the driven wheel together support the rotating filter conveyor belt 2. The loosening rake 15 is provided with rake teeth. A secondary support frame 7 is provided below the secondary rotating washing wheel 5. A secondary impurity removal canvas 9 is provided on the secondary rotating washing wheel 5, and the secondary impurity removal canvas 9 is in contact with the filter conveyor belt 2. A secondary scraper 11 is provided on the secondary support frame 7. The primary scraper 10 is located on one side of the primary impurity removal canvas 8, and the secondary scraper 11 is located on one side of the secondary impurity removal canvas 9. A primary washing disc 12 is provided above the primary rotating washing wheel 4, a secondary washing disc 13 is provided above the secondary rotating washing wheel 5, and a tertiary washing disc 14 is provided between the secondary rotating washing wheel 5 and the driving wheel 1. A recovery hopper 16 is provided below the loosening rake 15, and a tightening roller 18 is provided below the filter conveyor belt 2. A negative pressure sealing belt 17 is provided below the filter conveyor belt 2, and the negative pressure sealing belt 17 is located between the driving wheel 1 and the driven wheel.

[0024] The above-mentioned belt conveyor slurry impurity removal device includes the following steps during operation:

[0025] (1) The gypsum product falls onto the filter conveyor belt 2 through the discharge port 3. The drive wheel 1, the first-stage rinsing plate 12, the second-stage rinsing plate 13, the third-stage rinsing plate 14 and the vacuum pump start to work. The black substances on the surface of the gypsum are mostly removed after being treated by the first-stage cleaning canvas 8. After that, the black substances attached to the inside or bottom of the gypsum are exposed by the loosening rake 15. After being cleaned by the second-stage cleaning canvas 9, the product enters the next device through the discharge port 19. (2) When there is too much black substance on the first-stage cleaning canvas 8, the first-stage rotating rinsing wheel 4 is rotated. The first-stage cleaning canvas 8 approaches the first-stage scraper 10 and scrapes off the black substances attached to its surface.

Claims

1. A slurry impurity removal device for a belt conveyor, characterized in that, Includes a drive wheel (1), a filter conveyor belt (2) on the drive wheel (1), a discharge port (3) on the filter conveyor belt (2), a discharge outlet (19) on one side of the drive wheel (1), a primary rotating flushing wheel (4) and a secondary rotating flushing wheel (5) between the discharge outlet (3) and the discharge outlet (19), a loosening rake (15) between the primary rotating flushing wheel (4) and the secondary rotating flushing wheel (5), a primary support frame (6) below the primary rotating flushing wheel (4), a primary scraper (10) on the primary support frame (6), a primary impurity removal canvas (8) on the primary scraper (10), and the primary impurity removal canvas (8) in contact with the filter conveyor belt (2).

2. The belt conveyor slurry impurity removal device according to claim 1, characterized in that, The discharge port (3) is provided with a driven wheel on one side, and the driving wheel (1) and the driven wheel together support the rotating filter conveyor belt (2). The loosening rake (15) is provided with rake teeth.

3. The belt conveyor slurry impurity removal device according to claim 1, characterized in that, The secondary rotating flushing wheel (5) is provided with a secondary support frame (7) below it, and a secondary cleaning canvas (9) is provided on the secondary rotating flushing wheel (5). The secondary cleaning canvas (9) is in contact with the filter conveyor belt (2).

4. The belt conveyor slurry impurity removal device according to claim 3, characterized in that, The secondary support frame (7) is provided with a secondary scraper (11), the primary scraper (10) is located on one side of the primary cleaning canvas (8), and the secondary scraper (11) is located on one side of the secondary cleaning canvas (9).

5. The belt conveyor slurry impurity removal device according to claim 1, characterized in that, A first-level flushing disc (12) is provided above the first-level rotating flushing wheel (4), a second-level flushing disc (13) is provided above the second-level rotating flushing wheel (5), and a third-level flushing disc (14) is provided between the second-level rotating flushing wheel (5) and the drive wheel (1).

6. The belt conveyor slurry impurity removal device according to claim 1, characterized in that, The loosening rake (15) is provided with a recovery hopper (16) below it, and the filter conveyor belt (2) is provided with a tightening roller (18) below it.

7. The belt conveyor slurry impurity removal device according to claim 2, characterized in that, The filter conveyor belt (2) is provided with a negative pressure sealing belt (17) below it, and the negative pressure sealing belt (17) is located between the driving wheel (1) and the driven wheel.

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