Hardening-preventing slag bin of wet type submerged scraper conveyor

Abstract

The utility model provides a hardening-preventing slag bin of a wet type submerged scraper conveyor, and relates to the technical field of slag bin equipment of submerged scraper conveyors. Comprising a slag bin, a compressed air purging pipeline, a material level measuring point, a vibrator, a water filtering element and a water filtering pipe flowmeter. High and low material level measuring points are arranged in the slag bin, purging pipelines with control pneumatic valves are arranged in the middle and at the bottom of the slag bin, a water filtering element is arranged at the bottom of the slag bin, and a vibrator corresponding to the discharge port is further arranged. The material level is accurately judged through a material level measuring point, bottom slag is dredged through purging of a pipeline to prevent hardening, the flow meter monitors the water filtering state, and the vibrator assists in discharging. The problems of bottom slag hardening, material level misjudgment and the like are solved, the operation stability, reliability and efficiency of the slag bin are improved, the smooth production process is guaranteed, and the method is suitable for hardening prevention and efficient operation scenes of the slag bin of the wet-type submerged scraper conveyor.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for power equipment, and in particular to a slag bin for a wet scraper slag remover that prevents caking. Background Technology

[0002] The existing operation mode of wet scraper ash removal machines in ash bins: Taking most coal-fired power plants as an example, the bottom ash system adopts a wet mechanical ash removal method. During operation, the bottom ash falls from the furnace through the ash well into the water tank above the ash removal machine. The ash is cooled, cracked, and settles at the bottom of the tank. With the movement of the conveying scraper, it is gradually raised, draining most of the cooling water into the ash bin. The ash in the ash bin is further dehydrated through a drain filter pipe. The moisture content of the dehydrated ash is required to be below 25%, and it is regularly transported to comprehensive utilization users or ash disposal sites using dedicated dump trucks.

[0003] In the wet mechanical slag removal process of coal-fired power plants, the existing slag bin system has the following core defects:

[0004] Distortion in material level monitoring leads to caking risk: Traditional ultrasonic level gauges are easily affected by caking and adhesion on the inner wall of the slag bin, and cannot accurately reflect the actual material level. This makes it difficult for operators to adjust the slag removal frequency in a timely manner, and the slag bin remains in a high material level state for a long time, which aggravates the bottom slag compression and caking.

[0005] Stubborn and difficult-to-dredge bottom slag: After absorbing water, the quartz SiO2 in the bottom slag expands and forms a slag layer that cannot be broken by conventional rapping and water flushing under the pressure of the slag layer and the crystallization of calcium carbonate. This blocks the slag bin discharge port and may even force the generator unit to limit the load due to slag bin abnormalities.

[0006] Lack of real-time monitoring of filtration efficiency: When the filter element is clogged, it cannot be detected in time, and the increased moisture content of the bottom sludge further aggravates water absorption and caking, forming a vicious cycle. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a wet scraper slag bin for preventing caking, thus solving the problems mentioned in the background section. This achieves accurate material level monitoring, effectively prevents bottom slag caking, ensures normal operation of the filter elements, and facilitates smooth unloading. To achieve the above objectives, this utility model adopts the following technical solution:

[0008] A wet scraper slag bin for preventing caking includes: a slag bin, a compressed air purging pipe, a material level measuring point, a vibrator, a water filter element, and a water filter pipe flow meter;

[0009] The slag bin is equipped with high-level measuring points and low-level measuring points, and the high-level measuring points are installed at a higher height than the low-level measuring points.

[0010] The slag bin is equipped with compressed air purging pipes in the middle and at the bottom, and each purging pipe is equipped with a control pneumatic valve.

[0011] A water filter element is installed at the bottom of the slag bin. The water filter element is connected to the drainage system through a water filter pipe, and a water flow measurement point is provided on the water filter pipe.

[0012] The bottom of the slag bin is equipped with a vibrator, which is set in accordance with the discharge port at the bottom of the slag bin.

[0013] Furthermore, an ultrasonic level gauge is installed on the top of the slag bin to monitor the continuous changes in the slag level in real time.

[0014] Furthermore, the high-level measuring point and the low-level measuring point are level switches, which are used to assist in judging the warning height and safe height of the material level in the slag bin, respectively.

[0015] Furthermore, the central compressed air purging pipe is arranged circumferentially along the side wall of the slag bin, and the purging port is inclined at 30°-45° toward the center of the slag bin.

[0016] Furthermore, the bottom compressed air purging pipe is located in the cone section of the slag bin, and the horizontal distance between the purging port and the bottom discharge port of the slag bin is 0.5-1 meter.

[0017] Furthermore, the compressed air purging pipe is also equipped with a manual isolation valve, which is located between the pneumatic valve and the air source.

[0018] Furthermore, the water filtration element is a multi-layer metal filter screen with a pore size of 2-5mm, and a guide plate is provided below the filter screen.

[0019] Furthermore, the water flow measurement point is an electromagnetic flow meter, which is used to monitor the drainage flow in the filter pipe in real time and feed it back to the control system.

[0020] Furthermore, the vibrator is a pneumatic vibrator, which is fixed to the outside of the bottom of the slag bin by a bracket, and the vibrating frequency is 50-100 times / minute.

[0021] Furthermore, the bottom of the slag bin is equipped with a slag discharge pneumatic valve, which is connected to an instrument air tank and is powered by the air tank for opening and closing.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] By adding material level measuring points at different locations in the slag bin, multiple measuring points assist operators in judging the actual material level, ensuring the frequency of slag removal, and preventing the slag bin from caking due to prolonged high material levels on the side walls caused by inaccurate material level judgment. Adding flow meters to the slag bin's drainage pipes allows for real-time monitoring of the drainage components' operating status, enabling timely detection and handling of blockages, and preventing the bottom slag from absorbing water and caking due to high moisture content. The slag bin is equipped with central and bottom compressed air purging, combined with the use of vibrators, which effectively helps to clear and unblock the bottom slag, reducing the possibility of bottom slag caking. This solves the potential problem of generator unit load limiting caused by slag bin malfunctions, ensuring the safe and stable operation of the unit. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the process flow of an embodiment of this utility model.

[0026] In the above attached diagram: 1. Level gauge; 2. High level measuring point; 3. Slag bin; 4. Pneumatic valve for purging in the middle of the slag bin; 5. Purge pipe; 6. Vibrator; 7. Low level measuring point; 8. Instrument air tank; 9. Flow meter; 10. Drainage pipe; 11. Pneumatic valve for slag discharge; 12. Drainage element in the slag bin; 13. Pneumatic valve for purging at the bottom of the slag bin; 14. Manual valve for purging. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 As shown in the figure, this utility model embodiment proposes a slag bin for a wet scraper slag remover to prevent caking, including a slag bin 3. An ultrasonic level gauge 1 is installed on the top of the slag bin 3 to monitor the continuous changes in the slag level in the slag bin in real time and accurately report the slag level situation in the slag bin.

[0029] The slag bin 3 is equipped with a high material level measuring point 2 at a high position and a low material level measuring point 7 at a low position. This helps to assist in judging the true material level of the slag bin and effectively eliminates the interference of some caking inside the slag bin on the material level judgment. These points correspond to the warning height and safety height monitoring of the material level, respectively.

[0030] The slag bin 3 is equipped with a purge pipe 5, on which a manual purge valve 14 is installed, located between the pneumatic valve and the air source, to ensure the isolation of compressed air during system maintenance. The purge pipe 5 also includes a central pneumatic purge valve 4 and a bottom pneumatic purge valve 13. The central compressed air purge pipe is arranged circumferentially along the side wall of the slag bin, with the purge port inclined at 30°-45° towards the center of the slag bin. The bottom compressed air purge pipe is located in the cone section of the slag bin, with the horizontal distance between the purge port and the bottom discharge port of the slag bin being 0.5-1 meter. Compressed air can be intermittently used to loosen the bottom slag in the slag bin, preventing slag caking and allowing for the immediate removal of any loose or caked bottom slag.

[0031] The bottom of the slag bin 3 is equipped with a vibrator 6, specifically a pneumatic vibrator, which is fixed to the outside of the bottom of the slag bin by a bracket. The vibrating frequency is 50-100 times / minute. It is set to correspond to the discharge port at the bottom of the slag bin 3 to assist in emptying the bottom slag. When it is necessary to empty the bottom slag, it is used in conjunction with the slag discharge operation to help the bottom slag be unloaded smoothly onto the trailer.

[0032] A water filter element 12 is installed at the bottom of the slag bin 3. It adopts a multi-layer metal filter screen with a mesh size of 2-5mm. A guide plate is provided below the filter screen. The water filter element 12 is equipped with a drain pipe 10 to filter and discharge the water in the bottom slag into the ditch. A flow meter 9, specifically an electromagnetic flow meter, is installed on the drain pipe 10 to monitor the drainage flow in the water filter pipe in real time and feed it back to the control system. It can immediately reflect the working efficiency of the water filter element. If the water filtration efficiency is poor, timely maintenance and intervention can be carried out to prevent the bottom slag from caking due to high water content.

[0033] The bottom of the slag bin 3 is equipped with a slag discharge pneumatic valve 11 for venting bottom slag. The slag discharge pneumatic valve 11 is equipped with an instrument air storage tank 8 to provide the power air source for the slag discharge pneumatic valve and ensure stable power for slag discharge operation.

[0034] During actual operation, operators use level gauge 1, high level measuring point 2, and low level measuring point 7 to comprehensively determine the actual material level in the slag bin. Based on the material level, they intermittently open the pneumatic valve 4 in the middle of the slag bin or the pneumatic valve 13 at the bottom of the slag bin to purge and clear the bottom slag using compressed air. Simultaneously, the operating status of the filter element is monitored in real time by observing the flow meter 9. If a decrease in filtration efficiency is detected, the filter element is promptly inspected and repaired. When it is necessary to vent the bottom slag, the slag discharge pneumatic valve 11 is opened, and the vibrator 6 is activated to help the bottom slag be smoothly unloaded onto the trailer.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A slag bin for a wet scraper slag remover that prevents caking, characterized in that, Includes: slag bin, compressed air purging pipeline, material level measuring point, vibrator, water filter element and water filter pipe flow meter; The slag bin is equipped with high-level measuring points and low-level measuring points, and the high-level measuring points are installed at a higher height than the low-level measuring points. The slag bin is equipped with compressed air purging pipes in the middle and at the bottom, and each purging pipe is equipped with a control pneumatic valve. A water filter element is installed at the bottom of the slag bin. The water filter element is connected to the drainage system through a water filter pipe, and a water flow measurement point is provided on the water filter pipe. The bottom of the slag bin is equipped with a vibrator, which is set in accordance with the discharge port at the bottom of the slag bin.

2. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The top of the slag bin is equipped with an ultrasonic level gauge for real-time monitoring of continuous changes in the slag level.

3. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The high-level measuring point and the low-level measuring point are level switches, which are used to assist in judging the warning height and safe height of the material level in the slag bin, respectively.

4. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The central compressed air purging pipe is arranged circumferentially along the side wall of the slag bin, and the purging port is inclined at 30°-45° toward the center of the slag bin.

5. The slag bin of a wet scraper slag remover as described in claim 1, characterized in that, The bottom compressed air purging pipe is located in the cone section of the slag bin, and the horizontal distance between the purging port and the bottom discharge port of the slag bin is 0.5-1 meter.

6. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The compressed air purging pipeline is also equipped with a manual isolation valve, which is located between the pneumatic valve and the air source.

7. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The water filter element is a multi-layer metal filter screen with a pore size of 2-5mm, and a guide plate is provided below the filter screen.

8. The slag bin of a wet scraper slag remover as described in claim 1, characterized in that, The water flow measurement point is an electromagnetic flow meter, which is used to monitor the drainage flow in the filter pipe in real time and feed it back to the control system.

9. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The vibrator is a pneumatic vibrator, which is fixed to the outside of the bottom of the slag bin by a bracket, and the vibrating frequency is 50-100 times / minute.

10. The slag bin of a wet scraper slag remover for preventing caking as described in claim 1, characterized in that, The bottom of the slag bin is equipped with a slag discharge pneumatic valve, which is connected to an instrument air storage tank and is powered by the air storage tank.

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