A stirring device

Abstract

This application discloses a stirring device for stirring black water in the clear water tank of a coal gasification slag remover. The device includes: an air supply pipe for supplying compressed air; a control valve located on the air supply pipe for controlling airflow; a jet ring pipe connected to the air supply pipe and arranged inside the clear water tank of the slag remover; and multiple connecting pipes, all connected to the jet ring pipe, each connected to a nozzle for spraying compressed air to agitate the black water. This stirring device uses compressed air instead of an electric motor, eliminating the need for a speed reducer and other components, saving energy and procurement costs, avoiding impeller wear risks, simplifying maintenance, reducing maintenance cycles, and lowering repair costs. Eliminating the top motor improves the working environment, reduces casing corrosion, and lowers maintenance frequency, labor intensity, safety risks, and environmental pollution.

Description

Technical Field

[0001] This application generally relates to the field of slag and water treatment technology in coal gasification plants. More specifically, this application relates to a stirring device. Background Technology

[0002] During the operation of a coal gasification unit, the coal undergoes a gasification reaction in the gasifier, producing a large amount of coarse slag. This coarse slag is transferred to the slag pool of the slag remover via a slag lock hopper, where it is then separated from the black water. Existing slag removers typically consist of a housing, scrapers, chains, agitators, a reducer, an inducer wheel, a tensioning device, an overflow valve, and a slag pool pump. The housing is clearly divided into two areas: a slag side and a clean water side. In the specific separation process, the slag remover uses a reducer to drive the chain connected to the scrapers, thereby separating the slag from the black water in the slag pool. The separated slag is sent to a dewatering vibrating screen for secondary dewatering, and then transported away by a belt conveyor to a slag car. The separated black water enters the clean water side pool of the slag remover through the overflow valve.

[0003] To prevent fine ash from precipitating in the black water in the clear water tank and clogging the inlet pipeline of the slag tank pump, the existing technology usually installs an electric motor-driven agitator in the clear water tank of the slag remover. With the continuous operation of the agitator, the black water on the clear water side can be kept in a flowing state, so that the fine ash is suspended in the water. Finally, this black water is transported to the settling tank through the slag tank pump to treat the fine ash in it.

[0004] This type of motor-driven agitator has several inherent drawbacks in practical applications. First, because the interior of the clear water side of the slag remover is a rectangular pool, the mechanical agitator cannot cover the corners of the pool during operation, creating dead zones. Fine ash in the black water gradually settles in these dead zones, and when there is a large amount of slag, it can overload the agitator, causing it to trip or even fail to start. With prolonged operation, the agitator impeller can also wear, deform, or even detach due to continuous contact with slag particles. Once the agitator stops operating, the slag accumulation at the bottom of the clear water side of the slag remover will rapidly increase, leading to a higher solids content in the black water. This not only accelerates the wear of the slag pool pump and conveying pipelines but can also completely block the pump's inlet and outlet pipelines, directly affecting the stable operation of the gasification unit. Furthermore, subsequent maintenance requires installing blind flanges for energy isolation before manual entry into the confined space for slag removal, which is not only labor-intensive but also poses high safety risks and can easily cause environmental pollution to the equipment and ground. Second, the agitator's motor is installed on top of the slag remover, in an area with extremely harsh environmental conditions. When the gasifier discharges slag, trace amounts of acidic gas and toxic combustible gas will escape from the black water, along with a large amount of hot steam. This causes the motor to be in a high-temperature, humid, and corrosive environment for a long time, which in turn leads to corrosion of the motor casing and a significant reduction in its service life.

[0005] In view of this, there is an urgent need to provide a stirring device solution so as to more fully stir the black water to prevent fine ash in the black water from clogging the inlet pipeline of the slag pool pump. Utility Model Content

[0006] In order to at least solve one or more of the technical problems mentioned above, this application proposes a stirring device that is low in cost, highly safe and has good stirring effect in several aspects.

[0007] This application provides a stirring device for stirring black water in the clear water tank of a coal gasification slag remover, comprising: an air supply pipe for supplying compressed air; a control valve disposed on the air supply pipe for controlling the air flow; an air jet ring pipe connected to the air supply pipe and arranged inside the clear water tank of the slag remover; and a plurality of connecting pipes, all of which are connected to the air jet ring pipe, and each of the connecting pipes is connected to a nozzle for spraying compressed air to agitate the black water.

[0008] In some embodiments, the jet ring pipe has a cylindrical structure; the connecting pipe is disposed on the peripheral wall of the jet ring pipe and extends radially outward along the jet ring pipe.

[0009] In some embodiments, the clear water tank has a cuboid structure; the jet ring pipe is provided with four connecting pipes, and the extended ends of all these connecting pipes are provided with a frame adapted to the shape of the clear water tank, the frame is connected to the connecting pipes, and has a plurality of spaced nozzles below.

[0010] In some embodiments, a pressure gauge is provided on the air supply pipe for monitoring the pressure of compressed air.

[0011] In some embodiments, the operating pressure of the compressed air ranges from 0.3 MPa to 0.7 MPa.

[0012] In some embodiments, the installation height of the jet ring pipe is no more than 30 cm from the bottom of the clear water tank.

[0013] In some embodiments, the control valve is communicatively connected to the control system and can be remotely controlled to open or close.

[0014] By using the stirring device provided above, this embodiment of the application replaces the traditional electric motor drive with compressed air as the power source, eliminating the need for mechanical components such as speed reducers and impellers. This not only significantly saves energy consumption but also reduces equipment procurement costs. Attached Figure Description

[0015] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein: Figure 1 A schematic diagram of the structure of the stirring device according to an embodiment of this application, arranged in a slag tank, is shown.

[0016] In the diagram: 100, stirring device; 101. Air supply pipe; 102. Control valve; 103. Pressure gauge; 104. Air jet ring pipe; 105. Connecting pipe; 106. Pump inlet pipe; 107. Nozzle; 108. Frame. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0020] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0021] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 As shown, in some embodiments, this application provides a stirring device 100 for stirring black water in the clear water tank of a coal gasification slag remover, comprising: an air supply pipe 101 for supplying compressed air; a control valve 102 disposed on the air supply pipe 101 for controlling the air flow; an air jet ring pipe 104 connected to the air supply pipe 101 and arranged inside the clear water tank of the slag remover; and a plurality of connecting pipes 105, all of which are connected to the air jet ring pipe 104, and each of the connecting pipes 105 is connected to a nozzle 107, the nozzle 107 being used to spray compressed air to agitate the black water.

[0023] The mixing device 100 provided in this application mainly includes an air supply pipe 101, a control valve 102, an air jet ring pipe 104, a connecting pipe 105, and a nozzle 107. Specifically, the air supply pipe 101 serves as a compressed air delivery channel, responsible for introducing the compressed air generated by the air blower into the mixing device 100, providing a power source for the entire mixing process. The control valve 102 is installed on the air supply pipe 101 and is used to precisely regulate the flow of air, thereby effectively controlling the operating status of the mixing device 100. The air jet ring pipe 104 is located inside the clear water tank of the slag remover and is connected to the air supply pipe 101, responsible for receiving and distributing the compressed air delivered by the air supply pipe 101. In addition, multiple connecting pipes 105 are connected to the jet ring pipe 104. The multiple connecting pipes 105 extend to the area close to the side wall of the clear water pool, and each connecting pipe 105 is connected to a nozzle 107. The function of these nozzles 107 is to spray compressed air into the black water, thereby agitating the black water through airflow disturbance and preventing fine ash from settling.

[0024] In use, the stirring device 100 delivers compressed air that meets the pressure requirements to the jet ring pipe 104 through the air supply pipe 101. After being distributed through the connecting pipe 105, the compressed air is evenly sprayed into the black water in the clear water tank by each nozzle 107. The high-speed airflow creates strong turbulence in the water, driving the overall flow of the black water and keeping the fine ash in the black water in a suspended state, thus replacing the blade stirring function of the traditional mechanical stirrer.

[0025] The mixing device 100 provided in this application uses compressed air as power instead of the traditional electric motor drive, eliminating the need for mechanical components such as reducers and impellers. This not only significantly saves energy but also reduces equipment procurement costs. By eliminating the mechanical impeller, the risk of wear and deformation that may occur due to long-term operation is completely avoided, making maintenance simpler and extending the service life of the device significantly, thereby greatly reducing maintenance costs caused by frequent malfunctions. Simultaneously, by eliminating the electric motor installed on top of the slag remover, the device effectively improves the working environment and enhances safety: on the one hand, it avoids the electric motor being exposed to harsh environments containing high temperatures, humidity, acidic gases, and toxic flammable gases for extended periods, reducing corrosion of the motor casing and extending the equipment's service life; on the other hand, it significantly reduces the need for frequent maintenance due to motor failures or slag accumulation, lowering the frequency of manual entry into confined spaces for slag removal. This not only reduces the labor intensity of energy isolation and manual slag removal operations but also lowers related safety risks, while avoiding environmental pollution to on-site equipment and the ground during maintenance.

[0026] In one specific embodiment, the jet ring pipe 104 is a cylindrical structure; the connecting pipe 105 is disposed on the peripheral wall of the jet ring pipe 104 and extends outward along the radial direction of the jet ring pipe 104.

[0027] In this application, the jet ring pipe 104 adopts a cylindrical structure design. This structure can evenly distribute the compressed air delivered by the air supply pipe 101, laying the foundation for stable jetting of subsequent airflow. The connecting pipe 105 is disposed on the peripheral wall of the jet ring pipe 104 and extends outward along the radial direction of the jet ring pipe 104. Its extended end maintains a preset distance from the side wall of the clear water pool, and a nozzle 107 is provided at the extended end of each connecting pipe 105.

[0028] The solution of this application uses the layout of the connecting pipe 105 extending radially outward along the jet ring pipe 104, combined with the design of maintaining a preset distance between the extension end and the side wall of the clear water pool, to accurately cover the edge area of ​​the pool according to the size of the clear water pool, thereby avoiding the jet blind zone caused by the distance from the side wall of the clear water pool being too far, and ensuring that the airflow range covers the edge position of the clear water pool.

[0029] In one specific implementation, the clear water tank has a cuboid structure; and the extended ends of all these connecting pipes 105 are provided with a frame 108 adapted to the shape of the clear water tank. The frame 108 is connected to the connecting pipe 105 and has a plurality of spaced nozzles 107 below it.

[0030] In this application, taking advantage of the rectangular structure of the clear water tank, a rectangular frame 108 adapted to the shape of the clear water tank is provided at the extended end of the connecting pipe 105. The frame 108 is connected to the connecting pipe 105, and multiple nozzles 107 are installed at intervals below it. That is to say, in this application, the connecting pipe 105 is connected to the nozzles 107 through the frame 108.

[0031] In this application, the frame 108 is designed to fit the internal contours of the clear water tank, and multiple evenly spaced nozzles 107 below it can cover corner areas that are difficult for traditional mixers to reach. During use, compressed air enters the frame 108 through the connecting pipe 105 and is then evenly sprayed out by the nozzles 107, creating multi-directional airflow disturbance that drives the black water to flow comprehensively, effectively eliminating dead zones and preventing fine ash settling. This dual optimization of the frame 108's fit to the tank and the spacing of the nozzles 107 improves the comprehensiveness of airflow coverage and the uniformity of mixing, and, in conjunction with compressed air drive, enhances the fine ash suspension effect, ensuring production stability.

[0032] It is worth noting that the length of the connecting pipe 105 is not limited in the present application. That is to say, the connecting pipe 105 can be two pipes of the same length that are arranged opposite each other, or the four connecting pipes 105 can be of different lengths. It is only necessary to ensure that the distance between the extended end of each connecting pipe 105 and the side wall of the clear water pool opposite it is uniform.

[0033] In some embodiments, a pressure gauge 103 is provided on the air supply pipe 101, the pressure gauge 103 being used to monitor the pressure of the compressed air. The operating pressure range of the compressed air is 0.3 MPa to 0.7 MPa.

[0034] In this design, a pressure gauge 103 is installed on the air supply pipe 101. The pressure gauge 103 can detect and display the pressure value of the compressed air in the air supply pipe 101. Those skilled in the art will understand that the pressure of the compressed air directly affects the intensity of the airflow jet and the agitation effect of the black water. If the pressure is too low, the kinetic energy of the air jet from the nozzle 107 is insufficient, failing to effectively drive the black water flow, which may lead to the settling of fine ash. Conversely, if the pressure is too high, it may cause energy waste, or even cause additional damage to the pool or pipeline due to excessive airflow impact. Therefore, in this design, the compressed air pressure is controlled within the range of 0.3-0.7 MPa. During use, the operator can promptly monitor pressure changes through the real-time monitoring of the pressure gauge 103, and then adjust the air source or control valve 102 to ensure that the pressure is maintained within the optimal range, guaranteeing the uniformity and reliability of the agitation effect.

[0035] In addition, pressure gauge 103 can promptly report abnormal pressure conditions in the gas supply line 101. A sudden pressure drop may indicate pipeline leaks or gas source malfunctions, which, if not detected in time, could lead to agitation interruption. A sudden pressure rise may reflect a malfunction in control valve 102 or pipeline blockage, posing a risk of pipeline overpressure damage. In this solution, operators can quickly identify abnormalities and take intervention measures through the monitoring data from pressure gauge 103, reducing the probability of equipment failure and mitigating safety risks such as slag pool pump blockage and production interruptions caused by agitation failure.

[0036] In some implementations, the installation height of the jet ring pipe 104 is no more than 30 centimeters from the bottom of the clear water tank.

[0037] Those skilled in the art will understand that fine ash in black water tends to settle at the bottom of the pool. If the air jet ring pipe 104 is installed too high, the airflow will be attenuated by water resistance before reaching the bottom of the pool, failing to effectively stir the sediment and significantly reducing the stirring effect. Furthermore, it will increase the probability of fine ash settling in the middle and lower layers of the water, making it difficult for the airflow to fully carry it into a suspended state. Therefore, in this application, the installation height of the air jet ring pipe 104 is limited to a distance of no more than 30 cm from the bottom of the clear water pool. This ensures that the compressed air ejected from the nozzle 107 directly acts on the bottom area where fine ash is most likely to settle. Through the direct impact and disturbance of the airflow, the deposited or soon-to-be-deposited fine ash is reintroduced into the water flow, reducing the risk of settling from the source.

[0038] Furthermore, this application has been verified through actual testing that the optimal mixing effect is achieved when the installation height of the jet ring pipe 104 is limited to 20 cm from the bottom of the clear water tank. This height setting can more accurately match the settling characteristics of fine ash at the bottom of the tank, allowing the compressed air ejected from the nozzle 107 to act directly on the bottom area of ​​the tank with optimal intensity. Through the efficient impact and disturbance of the airflow, the deposition of fine ash is minimized, further improving the uniformity and stability of black water mixing, and effectively ensuring the operating effect of the device.

[0039] In one specific implementation, the control valve 102 is communicatively connected to the control system and can be remotely controlled to open or close.

[0040] In this application, the control valve 102 is installed on the air supply pipe 101 as a switch for compressed air delivery. Its communication connection with the control system enables a remote control mode that requires no on-site operation. During use, the operator can send commands to the control valve 102 through the control system, such as the workshop central control system, to precisely control the on / off of the airflow, thereby starting or stopping the operation of the stirring device 100. This design eliminates the reliance on on-site manual operation and is particularly suitable for harsh environments where there is hot steam, acidic gas, and toxic flammable gas around the slag remover's clear water pool.

[0041] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A stirring device (100) for stirring black water in the clear water tank of a coal gasification slag remover, characterized in that, include: Air supply pipe (101), which is used to deliver compressed air; A control valve (102) is provided on the air supply pipe (101) and is used to control the air flow. A jet ring pipe (104), which is connected to the air supply pipe (101), is arranged inside the clear water tank of the slag remover; and Multiple connecting pipes (105) are connected to the jet ring pipe (104), and each connecting pipe (105) is connected to a nozzle (107) for spraying compressed air to agitate the black water.

2. The stirring device (100) according to claim 1, characterized in that, The jet ring pipe (104) has a cylindrical structure; the connecting pipe (105) is disposed on the peripheral wall of the jet ring pipe (104) and extends outward along the radial direction of the jet ring pipe (104).

3. The stirring device (100) according to claim 2, characterized in that, The clear water pool has a rectangular parallelepiped structure. The jet ring pipe (104) is provided with four connecting pipes (105), and the extended ends of all these connecting pipes (105) are provided with a frame (108) adapted to the shape of the clear water pool. The frame (108) is connected to the connecting pipe (105) and has a plurality of spaced nozzles (107) below it.

4. The stirring device (100) according to claim 1, characterized in that, A pressure gauge (103) is installed on the air supply pipe (101), and the pressure gauge (103) is used to monitor the pressure of compressed air.

5. The stirring device (100) according to claim 4, characterized in that, The working pressure range of the compressed air is 0.3MPa to 0.7MPa.

6. The stirring apparatus (100) according to any one of claims 1-5, characterized in that, The installation height of the jet ring pipe (104) is no more than 30 cm from the bottom of the clear water tank.

7. The stirring device (100) according to claim 1, characterized in that, The control valve (102) is communicatively connected to the control system and can be remotely controlled to open or close.

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