CN204153792U - A kind of anti-overflow circulatory system for water immersion type scraping board slag conveyor - Google Patents

Abstract

The utility model relates to a kind of anti-overflow circulatory system for water immersion type scraping board slag conveyor, can produce the defect of overflow and the splashing of high temperature pulp water when compared with prior art solving water immersion type scraping board slag conveyor work.The utility model comprises dragveyer body and is installed on the slag bucket of dragveyer body upper part, the pipe outlet of chain flushing water pipeline is located at above the chain of the dragveyer body section of climbing, also comprise the anti-overflow chute be arranged on dragveyer body, anti-overflow slot in dragveyer body upper outside and around dragveyer body, the entrance of overflow water recovery channel is located at the bottom of anti-overflow chute, the pipe outlet of overflow water recovery channel is connected on chain flushing water pipeline, and overflow water recovery channel is provided with Pulp pump.The utility model achieves the anti-overflow process of submerged slag conveyor, solves the flooding problems in short-term maintaining the submerged slag conveyor that water level runs.

Description

An anti-overflow circulation system for water-immersed scraper scraper

technical field

The utility model relates to the technical field of a scraper slag remover, in particular to an anti-overflow circulation system for a water-immersed scraper slag remover.

Background technique

The slag removal method using the water-immersed scraper slag remover is the main scheme of hydraulic slag removal for domestic coal-fired units after 2000. The water-immersed scraper slag remover can effectively cool and granulate the high-temperature slag quickly, but Its slag water post-treatment system has been widely criticized for its large footprint, expensive equipment, high power consumption, cumbersome maintenance, and heavy workload. For this reason, some domestic power plants and design units try to maintain water level operation (also known as slag water self-balancing operation), maintain a reasonable water level when the slag extractor is running, and stop the subsequent slag water treatment system without overflowing. Judging from the actual operation situation, using the scraper slag scraper to maintain the water level can stop part of the original slag water post-treatment system, but it cannot completely eliminate the overflow phenomenon. This is due to the fact that the amount of replenished water is difficult to fully match the water consumption. At the same time, in order to ensure a safe water level, the operator deliberately maintains a small amount of short-term overflow during use, which still causes overflow. In addition, when the boiler soot blows or the boiler with severe coking drops large slag, it will cause high-temperature slag water splashing and short-term overflow, which will seriously affect the personal safety of operating personnel and the environmental sanitation of the plant. How to develop an anti-overflow device for the water-immersed scraper scraper has become an urgent technical problem to be solved.

Utility model content

The purpose of this utility model is to solve the defects of overflow and high-temperature slag splash in the prior art when the water-immersed scraper scraper is working, and to provide an anti-overflow for the water-immersed scraper scraper. flow circulation system to solve the above problems.

In order to achieve the above object, the technical scheme of the utility model is as follows:

An anti-overflow circulation system for a water-immersed scraper slag extractor, comprising a slag extractor body and a slag hopper installed on the upper part of the slag extractor body, and the pipe outlet of the chain flushing water pipeline is set at the slag extractor body climbing Above the chain of the section, it also includes an anti-overflow groove installed on the body of the slag removal machine. The anti-overflow groove is located on the upper outer side of the body of the slag removal machine and surrounds the body of the slag removal machine. The inlet of the overflow water recovery pipe is located at the anti-overflow At the bottom of the launder, the outlet of the overflow water recovery pipeline is connected to the chain flushing water pipeline, and a slurry pump is installed on the overflow water recovery pipeline.

It also includes a filter installed on the body of the slag extractor, the filter is located at the upper edge of the body of the slag extractor and surrounds the body of the slag extractor.

It also includes a splash guard, and the splash guard is installed above the overflow prevention tank and faces the slag hopper.

An accident overflow pipe is connected to the overflow prevention tank.

It also includes high and low liquid level gauge A and high and low liquid level gauge B, high and low liquid level gauge A is installed in the anti-overflow tank, high and low liquid level gauge B is installed in the slag removal machine body, high and low liquid level gauge A and high and low liquid level gauge B are respectively connected with the relay control box; the overflow water recovery pipeline is installed with the electric valve A, and the control end of the electric valve A and the control end of the slurry pump are respectively connected with the relay control box.

The accident overflow pipe is located below the overflow water level of the overflow prevention tank.

Beneficial effect

The utility model is an anti-overflow circulation system for a water-immersed scraper slag remover. Compared with the prior art, the anti-overflow treatment of the scraper slag remover is realized, and the problem of maintaining the water level of the scraper is solved. The short-term overflow problem of the slag extractor. It avoids splashing of high-temperature slag water caused by boiler soot blowing and coking and large slag during the operation of the traditional water-immersed scraper slag removal system, ensuring the safety of operating personnel and the environmental sanitation of the plant. Through the design of connecting the overflow water to the chain flushing water pipeline, not only the energy saving effect is achieved, but also the zero discharge of sewage during the operation of the scraper scraper machine is realized.

Description of drawings

Fig. 1 is the structural front view of the present utility model;

Fig. 2 is a structural side view of the utility model;

Among them, 1-slag hopper, 2-slagging machine body, 3-overflow prevention tank, 4-splash baffle, 5-filter, 6-high and low liquid level gauge A, 7-high and low liquid level gauge B, 8 -Electric valve A, 9-Manual valve A, 10-Check valve A, 11-Slurry pump, 12-Overflow water recovery pipeline, 13-Accident overflow pipeline, 14-Chain flushing water pipeline, 15-Check valve B, 16-manual valve B, 17-electric valve B, 18-conventional water supply pipeline, 19-check valve C, 20-manual valve C, 21-electric valve C, 22-relay control box.

Detailed ways

In order to have a further understanding and understanding of the structural features and the achieved effects of the utility model, a detailed description is provided in conjunction with preferred embodiments and accompanying drawings, as follows:

As shown in Figure 1 and Figure 2, the anti-overflow circulation system for the water-immersed scraper slag extractor described in the utility model includes the slag extractor body 2 and the slag extractor body 2 installed on the top Slag bucket 1. The pipeline outlet of the conventional water supply pipeline 18 is located above the chain of the descending section of the slag extractor body 2, and the conventional water supply pipeline 18 is respectively equipped with a check valve C19, a manual valve C20 and an electric valve C21. The pipeline outlet of the chain flushing water pipeline 14 is located above the chain of the climbing section of the slag removal machine body 2. The chain flushing water pipeline 14 is respectively equipped with a check valve B15, a manual valve B16 and an electric valve B17. The chain flushing water pipeline 14 comes out Water washes the chain of the slag removal machine body 2. Both the electric valve B17 and the electric valve C21 are connected with the relay control box 22, and are automatically controlled by the relay control box 22. The above are the contents of the prior art, and are also widely used in the slag water self-balancing operation system.

In order to avoid the overflow phenomenon that still occurs in the slag water self-balancing operation system, an anti-overflow groove 3 is installed on the slag removal machine body 2, and the overflow prevention groove 3 is directly installed on the slag removal machine body 2. The anti-overflow groove 3 is positioned at the upper outer side of the slag removal machine body 2 and surrounds the slag removal machine body 2, that is, the upper outer side of the slag removal machine body 2 is surrounded by an anti-overflow groove 3, preferably the anti-overflow groove 3 The height design is higher than the upper edge of the slag removal machine body 2. When the slag removal machine body 2 overflows, the overflow water does not flow out and enters the overflow prevention tank 3 for temporary storage, preventing the outflow. In order to ensure that the overflow water in the overflow tank 3 is discharged, the pipeline entrance of the overflow water recovery pipeline 12 is located at the bottom of the overflow tank 3, and the bottom of the overflow tank 3 can be designed with a slope, and the pipeline of the overflow water recovery pipeline 12 The entrance is located at the bottom of the slope, which is better than the discharge of overflow water; the bottom of the anti-overflow groove 3 can also be provided with a plurality of pipeline inlets of overflow water recovery pipes 12, which can discharge overflow water faster. The pipeline outlet of the overflow water recovery pipeline 12 is connected on the chain flushing water pipeline 14, and a slurry pump 11 is installed on the overflow water recovery pipeline 12. When the overflow water needs to be discharged, it can enter the chain flushing water pipeline 14 under the action of the slurry pump 11 and be used as chain flushing water. It not only solves the discharge problem of overflow water, but also plays a role in energy saving. Of course, according to the prior art, the overflow water recovery pipeline 12 is respectively installed with a manual valve A9 and a check valve A10 at both ends of the slurry pump 11 . An electric valve A8 is installed next to the check valve A10 on the overflow water recovery pipeline 12. The control end of the electric valve A8 is connected with the relay control box 22, and the opening and closing of the electric valve A8 can be controlled by the relay control box 22.

In order to prevent the anti-overflow tank 3 from accumulating and clogging, a filter screen 5 can be installed on the slag extractor body 2, and the filter screen 5 is located at the upper edge of the slag extractor body 2 and surrounds the slag extractor body 2. The filter screen 5 is used to filter impurities such as cinders and floating beads in the overflow water. When the slag removal machine body 2 finds overflow, the overflow water flows into the overflow prevention tank 3 through the filter screen 5, and the filter screen 5 filters the impurities therein. Avoid discharge clogging of the anti-overflow tank 3. In order to better prevent the high-temperature slag water from splashing when the large slag falls, causing personal injury to operating personnel and environmental pollution in the factory area, a splash guard 4 may also be included. An inwardly inclined splash guard 4 is arranged on the periphery of the overflow prevention tank 3, and the splash guard 4 is installed above the overflow prevention tank 3, facing the slag hopper 1, and the splash guard 4 is as close as possible to the slag hopper 1 (water seal board) wall. An accident overflow pipe 13 can also be connected to the anti-overflow tank 3, and the pipeline entrance of the accident overflow pipe 13 can be designed according to the position, usually it should be guaranteed to be located below the overflow water level of the anti-overflow tank 3, that is, not higher than the overflow water level. Level, but higher than the high level, used for emergency drainage in case of accidents or long-term over-temperature conditions.

In order to carry out automatic control better, it can also include a high and low liquid level gauge A6 and a high and low liquid level gauge B7, the high and low liquid level gauge A6 and the high and low liquid level gauge B7 are connected to the relay control box 22 respectively, and the control terminal of the slurry pump 11 is connected to the The relay control box 22 is connected. The high and low liquid level gauge A6 is installed in the anti-overflow tank 3. According to actual needs, the high liquid level of the high and low liquid level gauge A6 should preferably be lower than the accident overflow port (to avoid all water flowing away from the accident overflow port, and the water pump but not started), the low liquid level should ensure the normal start and stop of the slurry pump 11 and the anti-overflow tank 3 should be emptied as much as possible. The high and low liquid level meter A6 monitors the situation in the anti-overflow tank 3, and the monitoring signal sent by the high and low liquid level meter A6 is used to control the opening and closing of the electric valve B17 in the chain flushing water pipeline 14 and the opening and closing of the electric valve A8 in the overflow water recovery pipeline 12. Opening and closing and the start and stop of the slurry pump 11. The high and low liquid level gauge B7 is installed in the slag removal machine body 2. Similarly, the high and low liquid level gauge B7 can set the high liquid level at the overflow water level and the low liquid level at the safe operation water level of the equipment. The monitoring signal sent by the high and low liquid level gauge B7 The signal is used to control the opening and closing of the electric valve C21 in the conventional water supply pipeline 18 .

In actual use, when the scraper slag remover 2 overflows, the overflow water enters the overflow prevention tank 3 through the filter screen 5 for temporary storage, and the phenomenon of slag water discharge does not occur. When the high and low liquid level gauge B7 installed in the slag extractor 2 monitors the overflow water level, the electric valve C21 in the conventional water supply pipeline 18 is controlled to close by the relay control box 22 . Relying on the wet slag to take away water and evaporation loss, the water level of the slag extractor body 2 will gradually drop to the normal water level. At this time, the high and low liquid level gauge B7 controls the opening of the electric valve C21 through the relay control box 22, and the normal water replenishment resumes. In order to ensure the safety of the system and to deal with special working conditions, when there is a lot of overflow water in the anti-overflow tank 3 but does not reach the automatic control of the trigger relay control box 22 (the high liquid level of the high and low liquid level meter A6 is not reached), The manual valve B16 in the chain flushing water pipeline 14 can be closed manually, and the overflow water is used to flush the chain. After the normal water level is restored, the valve B16 is reopened to resume normal water supply.

When the high and low liquid level meter A6 installed in the anti-overflow tank 3 detects that the overflow water temporarily stored in the anti-overflow tank 3 reaches a high liquid level, the relay control box 22 controls the chain flushing water pipeline electric valve B17 to close, and the electric valve A8 Open, the slurry pump 11 starts, the overflow water enters the climbing section of the slag extractor body 2 through the overflow water recovery pipeline 12, and can flush the chain of the slag extractor body 2, realizing the internal circulation of the slag extractor slag water. After the anti-overflow tank 3 is emptied, the high and low liquid level gauge A6 controls the slurry pump 11 to stop through the relay control box 22, the electric valve B17 is opened, the electric valve A8 is closed, and normal flushing is resumed.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents. the

Claims (6)

1. An anti-overflow circulation system for a water-immersed scraper scraper, including a scraper body (2) and a slag hopper (1) installed on the upper part of the scraper body (2), chain flushing water The pipe outlet of the pipeline (14) is located above the chain of the climbing section of the slag removal machine body (2), and is characterized in that it also includes an overflow prevention groove (3) installed on the slag removal machine body (2) to prevent overflow The groove (3) is located on the outer side of the upper part of the slag extractor body (2) and surrounds the slag extractor body (2). The inlet of the overflow water recovery pipe (12) is located at the bottom of the overflow prevention tank (3), and the overflow water is recovered The pipeline outlet of the pipeline (12) is connected to the chain flushing water pipeline (14), and a slurry pump (11) is installed on the overflow water recovery pipeline (12). 2. An anti-overflow circulation system for water-immersed scraper slag extractor according to claim 1, characterized in that it also includes a filter screen (5) installed on the slag extractor body (2) , the filter screen (5) is located at the upper edge of the slag extractor body (2) and surrounds the slag extractor body (2). 3. An anti-overflow circulation system for a water-immersed scraper slag extractor according to claim 1, characterized in that it also includes an anti-splash baffle (4), and said anti-splash baffle ( 4) Installed above the anti-overflow tank (3) and facing the slag hopper (1). 4. An anti-overflow circulation system for water-immersed scraper slag extractor according to claim 1, characterized in that: said anti-overflow tank (3) is connected with an accident overflow pipe ( 13). 5. An anti-overflow circulation system for a water-immersed scraper slag extractor according to claim 1, characterized in that it also includes a high-low level gauge A (6) and a high-low level gauge B (7 ), the high and low liquid level gauge A (6) is installed in the anti-overflow tank (3), the high and low liquid level gauge B (7) is installed in the slag removal machine body (2), the high and low liquid level gauge A (6) and the high and low The liquid level gauge B (7) is respectively connected with the relay control box (22); the overflow water recovery pipe (12) is installed with the electric valve A (8), the control end of the electric valve A (8) and the slurry pump (11) The control ends are all connected with the relay control box (22). 6. An anti-overflow circulation system for water-immersed scraper slag extractor according to claim 4, characterized in that: the accidental overflow pipe (13) is located in the anti-overflow tank (3) below the overflow level.