Anti-blocking device for bottom of settling tank
By designing anti-blocking devices for the bottom of the settlement tank, including feed port switching and black water pipeline flushing system, the bottom flow pump blockage caused by scaling in the inner wall of the settlement tank is solved, ensuring the stable operation of the system and extending the operating cycle.
Patent Information
- Application Number
- CN202422182615.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The inner wall of the settlement tank is severely fouled, resulting in blockage of the inlet pipeline of the bottom flow pump, affecting the discharge of ash, and thus forcing the gasification system to stop or reduce production.
A blocking device for the bottom of the settlement tank is designed, including two feed ports, one for normal use and one for standby use. When the normal feed port is blocked, automatically switch to the backup feed port and start the backup pump to ensure the stable operation of the system. At the same time, a black water pipeline flushing system is set up to clean the pipeline regularly to prevent blockage.
Effectively prevent the bottom of the settlement tank from being blocked, ensure the normal operation of the system, avoid the gasification system stopping or reducing production, and extend the long-term operation of the system.
Smart Images
Figure CN223009902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slag water treatment, and specifically relates to an anti-blocking device for the bottom of a settling tank. Background Technique
[0002] The working principle of the settling tank is to utilize the sedimentation difference of particulate matters under the action of gravity to achieve solid-liquid separation. The clarified liquid with better water quality in the upper part overflows to the ash water tank for recycling, and the solid particles in the lower part are sent to the filter press by the underflow pump.
[0003] However, with the increase of the operation time, the inner wall of the settling tank scales seriously. During each start-up and shutdown process of the gasification system, due to the changes of factors such as pressure and water temperature, the wall hanging of the settling tank falls off and accumulates at the bottom of the settling tank, resulting in the blockage of the inlet pipeline of the underflow pump, and the ash and slag cannot be discharged in time, resulting in the forced shutdown or reduced production of the gasification system. Therefore, in order to extend the long-term operation of the system, it is necessary to propose an effective solution. Content of the Utility Model
[0004] The purpose of the utility model is to provide an anti-blocking device for the bottom of a settling tank to solve the problems put forward in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: an anti-blocking device for the bottom of a settling tank, including a first feed inlet and a second feed inlet. Both the first feed inlet and the second feed inlet are fixed at the bottom of the conical shell. The position of the second feed inlet is higher than that of the first feed inlet. The first feed inlet is connected to the underflow pump through a pipeline, and the underflow pump is connected to the filter press through a pipeline; the second feed inlet is connected to a standby channel through a pipeline. The standby channel includes a standby underflow pump, and the standby underflow pump is connected to the filter press through a pipeline. Moreover, the standby channel and the pipelines between the first feed inlet and the underflow pump are all connected to the black water pipeline flushing water system.
[0006] Preferably, the first feed inlet and the second feed inlet are respectively distributed on both sides of the conical shell, and a bottom slag discharge valve is installed at the bottom end of the conical shell.
[0007] Preferably, a settling tank discharge valve and an underflow pump inlet valve are installed on the pipe body between the first feed inlet and the underflow pump. The settling tank discharge valve is located at one end of the pipeline close to the first feed inlet, and the underflow pump inlet valve is located at one end of the pipeline close to the underflow pump.
[0008] Preferably, an underflow pump outlet valve is installed on the pipeline connecting the underflow pump to the filter press.
[0009] Preferably, a spare settling tank discharge valve, a spare underflow pump inlet valve, and a spare underflow pump outlet valve are installed on the spare channel. The spare settling tank discharge valve and the spare underflow pump inlet valve are located between the second feed inlet and the spare underflow pump. The spare settling tank discharge valve is located at one end of the pipeline between the second feed inlet and the spare underflow pump close to the second feed inlet, and the spare underflow pump inlet valve is located at one end of the pipeline between the second feed inlet and the spare underflow pump close to the spare underflow pump. The spare underflow pump outlet valve is installed on the pipeline between the spare underflow pump and the filter press.
[0010] Preferably, the black water pipeline flushing water system includes three branches, which are respectively connected to the bottom end of the conical shell, the pipeline between the second feed inlet and the spare underflow pump, and the pipeline between the first feed inlet and the underflow pump, and control valves are arranged on all three branches.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] The anti-blocking device for the bottom of the settling tank proposed by the present utility model changes the bottom of the previous equipment into a conical structure, with an anti-corrosion coating provided on the inner wall. Flange openings are provided at corresponding positions at the conical bottom, and an external valve is connected to the ash slag collection area. Two holes with different heights are opened on the conical side wall as the feed holes for the underflow pump. The lower hole is used as the common hole during normal operation; when scale falls off during system startup and shutdown, the lower hole is blocked, and the upper hole is used instead while starting the spare pump to stabilize production. Since there are many ash slag and black water impurities and they are corrosive, the corresponding pipelines and valves should use wear-resistant and anti-corrosion materials, and flushing water should be provided on the corresponding ash slag and black water pipelines. Description of the Drawings
[0013] Figure 1 It is a schematic structural diagram of the present utility model.
[0014] In the figure: the first feed inlet 1, the second feed inlet 2, the bottom slag discharge valve 3, the underflow pump 4, the spare underflow pump 5, the black water pipeline flushing water system 6, the spare settling tank discharge valve 7, the spare underflow pump inlet valve 8, the spare underflow pump outlet valve 9, the settling tank discharge valve 10, the underflow pump outlet valve 11, the underflow pump inlet valve 12, the conical shell 13. Detailed Embodiments
[0015] In order to clearly and completely describe the purpose and technical solution of the present utility model, and make the advantages more clear, the following further details the embodiments of the present utility model with reference to the drawings. It should be understood that the specific embodiments described herein are some embodiments of the present utility model, but not all of them, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0016] Please refer to Figure 1 , the present utility model provides a technical solution: an anti-blocking device for the bottom of a settling tank, which includes a first feed inlet 1 and a second feed inlet 2. Both the first feed inlet 1 and the second feed inlet 2 are fixed at the bottom of a conical shell 13. The first feed inlet 1 and the second feed inlet 2 are respectively distributed on both sides of the conical shell 13. A bottom slag discharge valve 3 is installed at the bottom end of the conical shell 13. The position of the second feed inlet 2 is higher than that of the first feed inlet 1.
[0017] The first feed inlet 1 is connected to a bottom flow pump 4 through a pipeline, and the bottom flow pump 4 is connected to a filter press through a pipeline. A settling tank discharge valve 10 and a bottom flow pump inlet valve 12 are installed on the pipeline between the first feed inlet 1 and the bottom flow pump 4. The settling tank discharge valve 10 is located at one end of the pipeline close to the first feed inlet 1, and the bottom flow pump inlet valve 12 is located at one end of the pipeline close to the bottom flow pump 4. A bottom flow pump outlet valve 11 is installed on the pipeline where the bottom flow pump 4 is connected to the filter press. When the system operates normally, the black water at the bottom of the settling tank is sent to the filter press through the first feed inlet 1, the settling tank discharge valve 10, the bottom flow pump inlet valve 12, the bottom flow pump 4, and the bottom flow pump outlet valve 11, and the black water settling system operates normally.
[0018] The second feed inlet 2 is connected to the standby channel through a pipeline. The standby channel includes a standby underflow pump 5. The standby underflow pump 5 is connected to the filter press through a pipeline. A standby settling tank discharge valve 7, a standby underflow pump inlet valve 8, and a standby underflow pump outlet valve 9 are installed on the standby channel. The standby settling tank discharge valve 7 and the standby underflow pump inlet valve 8 are between the second feed inlet 2 and the standby underflow pump 5. The standby settling tank discharge valve 7 is at one end of the pipeline between the second feed inlet 2 and the standby underflow pump 5 close to the second feed inlet 2. The standby underflow pump inlet valve 8 is at one end of the pipeline between the second feed inlet 2 and the standby underflow pump 5 close to the standby underflow pump 5. The standby underflow pump outlet valve 9 is installed on the pipeline between the standby underflow pump 5 and the filter press; when the system starts up and shuts down or production fluctuations cause scaling or wall hanging to fall off, a large number of scale flakes block the first feed inlet 1, the settling tank discharge valve 10, the underflow pump inlet valve 12, and the impeller of the underflow pump 4, resulting in blockage of the underflow pump inlet pipeline and the impeller of the pump body. The black water cannot be sent to the filter press, affecting the normal operation of the settling tank system. In severe cases, the equipment is damaged or the gasifier is forced to stop. At this time, a large number of scale flakes at the bottom of the settling tank are first discharged to the ash and slag collection place through the bottom slag discharge valve 3, and then the second feed inlet 2, the standby settling tank discharge valve 7, the standby underflow pump inlet valve 8, and the standby underflow pump 5 are opened. The standby underflow pump 5 is started, and then the standby underflow pump outlet valve 9 is slowly opened and sent to the filter press to make the settling tank system operate normally. When the system is in normal production, through the flushing water system, the underflow pump inlet valve 12 is closed, the lowest hand valve of the flushing water system is opened, and the settling tank discharge valve 10 is opened to backflush the scale flakes in the pipeline to the bottom of the settling tank. After standing for a period of time, the scale flakes are discharged to the ash and slag collection place through the bottom slag discharge valve 3. The pump shell of the underflow pump 4 is disassembled, the settling tank discharge valve 10 is closed, and the underflow pump inlet valve 12 is opened to flush out the scale flakes in the pipeline and the impeller of the pump body. The bottom slag discharge valve 3 is opened every 2 - 4 hours to discharge the scale flakes at the conical bottom to the ash and slag collection place. When no scale flakes are discharged from the bottom slag discharge valve 3, the settling tank discharge valve 10 is opened to switch to the normal process and pass through the pipeline of the underflow pump 4.
[0019] The standby channel and the pipeline between the first feed inlet 1 and the underflow pump 4 are both connected to the black water pipeline flushing water system 6. The black water pipeline flushing water system 6 includes three branches. The three branches are respectively connected to the bottom end of the conical shell 13, the pipeline between the second feed inlet 2 and the standby underflow pump 5, and the pipeline between the first feed inlet 1 and the underflow pump 4, and control valves are arranged on the three branches; when the system stops for a long time or is under maintenance, the settling tank discharge valve 10 can be closed and the pipeline and the black water in the pump can be flushed clean with the black water pipeline flushing water system 6 to avoid blockage or corrosion of the pipeline and the machine pump due to long-term shutdown.
[0020] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for preventing the bottom of a sedimentation tank from being blocked, comprising a first feed port (1) and a second feed port (2), wherein the first feed port (1) and the second feed port (2) are both fixed at the bottom of a conical shell (13), characterized in that: The feed port 2 (2) is located at a higher position than the feed port 1 (1); the feed port 1 (1) is connected to an underflow pump (4) via a pipeline, and the underflow pump (4) is connected to a filter press via a pipeline; the feed port 2 (2) is connected to a spare channel via a pipeline, the spare channel includes a spare underflow pump (5), and the spare underflow pump (5) is connected to the filter press via a pipeline, and the spare channel and the pipeline between the feed port 1 (1) and the underflow pump (4) are all connected to a black water pipeline flushing water system (6).
2. The device for preventing blockage at the bottom of a sedimentation tank according to claim 1, characterized in that: The feed inlet 1 (1) and the feed inlet 2 (2) are respectively distributed on both sides of the conical shell (13), and a bottom slag discharge valve (3) is installed at the bottom end of the conical shell (13).
3. The device for preventing blockage at the bottom of a sedimentation tank according to claim 1, characterized in that: A settling tank discharge valve (10) and an underflow pump inlet valve (12) are installed on the pipe body between the feed inlet 1 (1) and the underflow pump (4). The settling tank discharge valve (10) is located at one end of the pipe close to the feed inlet 1 (1), and the underflow pump inlet valve (12) is located at one end of the pipe close to the underflow pump (4).
4. The device for preventing blockage at the bottom of a sedimentation tank according to claim 1, characterized in that: An underflow pump outlet valve (11) is installed on the pipeline connecting the underflow pump (4) to the filter press.
5. The device for preventing blockage at the bottom of a sedimentation tank according to claim 1, characterized in that: The standby passage is provided with a standby sedimentation tank discharge valve (7), a standby underflow pump inlet valve (8) and a standby underflow pump outlet valve (9); the standby sedimentation tank discharge valve (7) and the standby underflow pump inlet valve (8) are located between the second feed port (2) and the standby underflow pump (5); the standby sedimentation tank discharge valve (7) is located at one end of the pipeline between the second feed port (2) and the standby underflow pump (5) close to the second feed port (2); the standby underflow pump inlet valve (8) is located at one end of the pipeline between the second feed port (2) and the standby underflow pump (5) close to the standby underflow pump (5); and the standby underflow pump outlet valve (9) is installed on the pipeline between the standby underflow pump (5) and the filter press.
6. The device for preventing blockage at the bottom of a sedimentation tank according to claim 1, characterized in that: The black water pipeline flushing water system (6) comprises three branches, which are respectively connected to the bottom end of the conical shell (13), the pipeline between the second feed port (2) and the spare underflow pump (5), and the pipeline between the first feed port (1) and the underflow pump (4), and control valves are arranged on the three branches.