Pollution discharge device for coal conveying system
By setting up partition plates and grilles in the sewage pit, the sedimentation and separation of coal slime and coal blocks is achieved, and the problem of equipment failure caused by coal slime and coal blocks in the sewage pit is solved, the sewage treatment efficiency and system stability are improved, and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421456763.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The deposition of coal sludge and coal blocks in existing sewage pits leads to equipment failure, affecting sewage treatment efficiency and increasing maintenance costs.
A sewage discharge device for coal transportation system is designed, including a partition plate to divide the sewage pit into a sedimentation area and a drainage area, a grille pre-filters large-particle coal block, a water pump and a drainage pipeline are used to treat sewage, and a liquid level gauge and a control device are used to automatically control the sewage discharge process.
Through preliminary precipitation and separation, the risk of impurities blocking the water pump is reduced, the efficiency of sewage treatment is improved, maintenance costs are reduced, and automated control is achieved to improve system stability.
Smart Images
Figure CN222804746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal-water separation, in particular to a sewage discharge device for a coal transportation system. Background Art
[0002] At present, coal-fired thermal power plants generally use hydraulic cleaning as the main cleaning method for coal transportation systems. Operators use flushing spray guns to manually clean the floors of various transfer stations, trestles and other coal transportation system buildings. The generated sewage carries coal mud, coal dust and a small amount of coal blocks, which flows into the drainage ditch at the bottom through the floor drains and downpipes on the floor. The drainage ditch finally collects these coal-containing sewage into the drainage pit at the lowest point of the building.
[0003] As the wastewater collection area of each coal transportation system structure, the sewage pit undertakes the key task of collecting coal-containing sewage and sending it to the sewage treatment facility. Each structure has at least one sewage pit. After the sewage is collected in the sewage pit, it is sent to the sewage treatment station of the power plant by the sewage pump installed in it for treatment.
[0004] However, most sewage pits are only used as simple collection pools. Since coal-containing sewage is mixed with coal slime, coal dust and coal lumps, these impurities are easily deposited at the bottom of the pool during operation. Long-term accumulation will block the sewage pump, causing equipment damage and affecting sewage recovery. For this reason, thermal power plants often need to manually clean up the sediment, which not only has a harsh working environment, low efficiency, but also high labor intensity. Utility Model Content
[0005] The utility model aims to design a sewage discharge device for a coal transport system which can solve the problem of equipment failure caused by the deposition of coal slime and coal blocks which is common in sewage pits.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a sewage discharge device for a coal transportation system, comprising: a sewage discharge pit, a partition plate, a water pump, a drainage pipeline, a grille, and a sewage discharge ditch for introducing coal-containing sewage;
[0007] The partition plate is arranged in the drainage pit along the up and down directions and divides the drainage pit into a sedimentation area and a drainage area. A connecting channel connecting the sedimentation area and the drainage area is provided on the top of the partition plate. The water outlet of the drainage ditch is connected to the sedimentation area. The grille is arranged at the water outlet of the drainage ditch. The first end of the drainage pipeline is arranged in the drainage pit and connected to the drainage area, and the second end thereof is used to connect to a sewage treatment station. The water pump is arranged on the drainage pipeline.
[0008] Furthermore, it also includes a liquid level meter, which is arranged in the drainage area.
[0009] Furthermore, it also includes a first sewage valve, the water pump is located at the first end of the drainage pipeline, the first sewage valve is connected in series to the drainage pipeline, and is located between the water pump and the second end of the drainage pipeline.
[0010] Furthermore, it also includes a check valve assembly, which is connected in series to the drainage pipeline and is located between the water pump and the first sewage valve.
[0011] Furthermore, it also includes a backflush pipeline and a second sewage valve, one end of the backflush pipeline is connected to the drainage pipeline and is located between the first sewage valve and the water pump, the other end of the backflush pipeline is arranged at the bottom of the drainage area, and the second sewage valve is connected in series to the backflush pipeline.
[0012] Furthermore, it also includes a branch pipeline, one end of which is connected to the backwash pipeline and is located on the side of the second sewage valve close to the drainage area, and the other end of the branch pipeline is connected to the bottom of the sedimentation area.
[0013] Furthermore, the first end of the drainage pipeline is arranged at the bottom of the drainage area.
[0014] Furthermore, the water outlet of the drainage ditch is arranged above the sedimentation area.
[0015] Furthermore, the aperture of the grille is 50mm*50mm.
[0016] Furthermore, it also includes a control device, which is communicatively connected with the water pump, the first sewage valve, the second sewage valve and the liquid level meter respectively.
[0017] Compared with the prior art, the sewage discharge device for a coal transport system in the embodiment of the utility model has the following beneficial effects:
[0018] The sewage discharge device for the coal transportation system of the utility model embodiment pre-filters large-particle coal blocks through a grid to prevent large pieces of coal or debris from entering the sewage pit and damaging the sewage pump; the sewage pit is divided into a drainage area and a sedimentation area by the setting of a partition plate, thereby achieving preliminary sedimentation and separation of coal-containing sewage and preventing impurities from clogging the water pump, which not only improves the efficiency and effect of sewage treatment, but also reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of a sewage discharge device for a coal transport system according to an embodiment of the utility model.
[0020] In the figure, 1. sewage pit; 11. sedimentation area; 12. drainage area; 13. connecting channel; 2. partition plate; 3. water pump; 4. drainage pipeline; 41. first end; 42. second end; 5. grille; 6. sewage ditch; 7. liquid level meter; 81. first sewage valve; 82. second sewage valve; 83. inspection valve assembly; 91. backwash pipeline; 92. branch pipeline. DETAILED DESCRIPTION
[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0023] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or a welding connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] The present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.
[0025] Reference Figure 1 , a sewage discharge device for a coal transport system according to an embodiment of the utility model comprises: a sewage discharge pit 1, a partition plate 2, a water pump 3, a drainage pipeline 4, a grille 5 and a sewage discharge ditch 6 for introducing coal-containing sewage;
[0026] The partition plate 2 is arranged in the sewage pit 1 along the up and down direction and divides the sewage pit 1 into a sedimentation area 11 and a drainage area 12. A connecting channel 13 connecting the sedimentation area 11 and the drainage area 12 is provided on the top of the partition plate 2. The outlet of the sewage ditch 6 is connected to the sedimentation area 11. The grille 5 is arranged at the outlet of the sewage ditch 6. The first end 41 of the drainage pipe 4 is arranged in the sewage pit 1 and connected to the drainage area 12. The second end 42 thereof is used to connect to the sewage treatment station. The water pump 3 is arranged on the drainage pipe 4.
[0027] A grid 5 for intercepting large pieces of coal is added at the outlet of the drainage ditch 6 to prevent large pieces of coal or debris from entering the drainage pit 1 and damaging the sewage pump 3. A partition plate 2 is set to divide the drainage pit 1 into a drainage area 12 and a sedimentation area 11. After the coal-containing sewage enters the sedimentation area 11, it is blocked by the partition plate 2 and temporarily stored in the sedimentation area 11. The suspended coal slime in the coal-containing sewage will gradually settle below the sedimentation area 11. With the continuous discharge of sewage from the drainage ditch 6, the water level of the coal-containing sewage in the sedimentation area 11 gradually rises, and the coal-containing sewage after sedimentation passes over the partition plate 2 and enters the drainage area 12 from the connecting channel 13. At this time, the concentration of the suspended coal slime in the coal-containing sewage is effectively reduced after being clarified in the sedimentation area 11, and a large amount of coal slime deposition will not be formed at the suction port of the water pump 3, which can avoid the blockage of the water pump 3 and reduce the occurrence of equipment damage.
[0028] Some improved schemes of the present application further include a liquid level meter 7, which is arranged in the drainage area 12. The liquid level meter 7 is used to detect the water level in the drainage area 12, so as to determine the opening and closing of the water pump 3 or the related sewage valve.
[0029] In some improved solutions of the present application, a first drain valve 81 is further included. The water pump 3 is located at the first end 41 of the drainage pipeline 4. The first drain valve 81 is connected in series to the drainage pipeline 4 and is located between the water pump 3 and the second end 42 of the drainage pipeline 4. The provision of the first drain valve 81 allows the operator to control the flow of sewage more flexibly. By closing the first drain valve 81, the connection between the drainage pit 1 and the sewage treatment station can be isolated, which is convenient for flushing or cleaning the system.
[0030] In some improved solutions of the present application, a check valve assembly 83 is further included, which is connected in series to the drainage pipeline 4 and is located between the water pump 3 and the first sewage valve 81. When the drainage pipeline 4, the water pump 3 or the first sewage valve 81 needs maintenance or replacement, the check valve assembly 83 can be closed to isolate the part, ensuring the normal operation of other parts, thereby improving the stability of the system.
[0031] In some improved schemes of the present application, a backwash pipeline 91 and a second sewage valve 82 are also included. One end of the backwash pipeline 91 is connected to the drainage pipeline 4 and is located between the first sewage valve 81 and the water pump 3. The other end of the backwash pipeline 91 is arranged at the bottom of the drainage area 12. The second sewage valve 82 is connected in series to the backwash pipeline 91. When the water level of the coal-containing sewage in the drainage area 12 is high, the first sewage valve 81 can be closed, the second sewage valve 82 can be opened, and the sewage pump 3 can be started. The relatively clean coal-containing sewage in the drainage area 12 re-enters the bottom of the drainage area 12 through the backwash pipeline 91 to cause a rapid jet, thereby violently disturbing the drainage area 12. The small amount of coal sludge deposited in the drainage area 12 is re-formed into a uniform suspension state under the disturbance of the high-speed jet, which is convenient for discharge and cleaning.
[0032] In some improved schemes of the present application, a branch pipeline 92 is further included, one end of which is connected to the backwash pipeline 91 and is located on the side of the second sewage valve 82 close to the drainage area 12, and the other end of the branch pipeline 92 is connected to the bottom of the sedimentation area 11. When the water level of the coal-containing sewage in the drainage area 12 is high, the first sewage valve 81 is closed, the second sewage valve 82 is opened, and the sewage pump 3 is started. The relatively clean coal-containing sewage in the drainage area 12 re-enters the bottom of the drainage area 12 and the sedimentation area 11 through the backwash pipeline 91 and its branch pipeline 92. The sewage causes a rapid jet at the bottom of the sewage pit 1, thereby violently disturbing the drainage area 12 and the sedimentation area 11. The small amount of coal slime deposited in the drainage area 12 and the large amount of coal slime deposited in the sedimentation area 11 are re-formed into a uniform suspension state under the disturbance of the high-speed jet, which is convenient for discharge and cleaning.
[0033] In some improved solutions of the present application, the first end 41 of the drainage pipe 4 is arranged at the bottom of the drainage area 12 to facilitate the discharge of sewage in the drainage area 12.
[0034] In some improved solutions of the present application, the outlet of the drainage ditch 6 is arranged above the sedimentation area 11, and the outlet and the grid 5 are arranged above the sedimentation area 11, so that the coal-containing sewage can enter the sedimentation area 11 and the staff can clean the grid 5 regularly. The grid 5 can also be hoisted as a whole, and the staff can clean the large coal lumps inside it.
[0035] In some improved solutions of the present application, the aperture of the grille 5 is 50 mm*50 mm to prevent large pieces of coal or debris from entering the sewage pit 1 and damaging the sewage pump 3.
[0036] Some improved solutions of the present application further include a control device, which is communicatively connected to the water pump 3, the first sewage valve 81, the second sewage valve 82 and the liquid level meter 7 respectively.
[0037] Specifically, the water level above the partition plate 2 may be defined as a high liquid level, and the water level below the partition plate 2 may be defined as a low liquid level.
[0038] The specific operation process of the sewage discharge device of this application is as follows:
[0039] The drainage ditch 6 drains the water, and the water level of the coal-containing sewage in the sedimentation area 11 gradually rises. The clarified coal-containing sewage passes over the partition plate 2 and enters the drainage area 12 from the connecting channel 13, so that the water level of the coal-containing sewage in the drainage area 12 gradually rises. When the liquid level meter 7 detects that the sewage in the drainage area 12 reaches a high liquid level, the control device controls the first sewage valve 81 to close, opens the second sewage valve 82, and starts the sewage pump 3 at the same time. The coal-containing sewage in the drainage area 12 enters the bottom of the drainage area 12 and the sedimentation area 11 through the backwash pipeline 91 and the branch pipeline 92. The backwash pipeline 91 causes a fast jet at the bottom of the drainage pit 1, thereby violently disturbing the drainage area 12 and the sedimentation area 11. The small amount of coal slime deposited in the drainage area 12 and the large amount of coal slime deposited in the sedimentation area 11 are re-formed into a uniform suspension state under the disturbance of the high-speed jet.
[0040] After a delay of 30 seconds, when the coal slime in the sewage pit 1 is evenly suspended, the first sewage valve 81 is opened, the second sewage valve 82 is closed, and the water pump 3 pumps the coal-containing sewage in the drainage area 12 to the coal-water treatment station of the power plant. The coal-containing sewage in each sewage pit 1 is transported to the coal-water treatment station for unified treatment through the control device, without the need to clean the precipitated coal slime in each sewage pit 1 separately.
[0041] The water level in the drainage area 12 gradually decreases. Due to the presence of the partition plate 2, the water level in the sedimentation area 11 will only decrease to the same height as the partition plate 2. When the water level reaches the low liquid level, the water pump 3 stops pumping and the first sewage valve 81 is closed. At this time, the water level in the drainage area 12 is the low liquid level, and the water level in the sedimentation area 11 is flush with the partition plate 2. The coal-containing sewage in the sewage ditch 6 continues to flow into the sedimentation area 11 for clarification, and the next transportation cycle begins.
[0042] In summary, the embodiment of the utility model provides a sewage discharge device for a coal transportation system, which has the following advantages:
[0043] 1. Use the sedimentation area 11 to carry out sedimentation and clarification to reduce the concentration of suspended matter in the coal-containing sewage in the drainage area 12, so that the sewage pump 3 can operate normally;
[0044] 2. The backwash pipe 91 and the branch pipe 92 connected to the drainage pipe 4 are used to self-backwash the sewage pit 1 without introducing external water source;
[0045] 3. Use high backwash water jets to disturb and fully stir the coal slime deposited at the bottom of the drainage area 12 and the sedimentation area 11, without the need to set up mechanical stirring or dredging equipment, and without the need for separate mechanical maintenance;
[0046] 4. The coal-containing wastewater from each sewage pit 1 is pumped to the coal-containing wastewater treatment station for unified treatment, and there is no need to clean the coal sludge in each sewage pit 1 separately.
[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A sewage discharge device for a coal transport system, characterized in that: include: Sewage pits, dividers, pumps, drainage pipes, gratings and drainage ditches for coal-containing sewage; The partition plate is arranged in the drainage pit along the up and down directions and divides the drainage pit into a sedimentation area and a drainage area. A connecting channel connecting the sedimentation area and the drainage area is provided on the top of the partition plate. The water outlet of the drainage ditch is connected to the sedimentation area. The grille is arranged at the water outlet of the drainage ditch. The first end of the drainage pipeline is arranged in the drainage pit and connected to the drainage area, and the second end thereof is used to connect to a sewage treatment station. The water pump is arranged on the drainage pipeline.
2. The sewage discharge device for a coal transportation system according to claim 1, characterized in that: It also includes a liquid level meter, which is arranged in the drainage area.
3. The sewage discharge device for a coal transportation system according to claim 2, characterized in that: It also includes a first sewage valve. The water pump is located at the first end of the drainage pipeline. The first sewage valve is connected in series to the drainage pipeline and is located between the water pump and the second end of the drainage pipeline.
4. The sewage discharge device for a coal transportation system according to claim 3, characterized in that: It also includes a check valve assembly, which is connected in series to the drainage pipeline and is located between the water pump and the first sewage valve.
5. The sewage discharge device for a coal transportation system according to claim 3, characterized in that: It also includes a backflush pipeline and a second sewage valve, one end of the backflush pipeline is connected to the drainage pipeline and is located between the first sewage valve and the water pump, the other end of the backflush pipeline is arranged at the bottom of the drainage area, and the second sewage valve is connected in series to the backflush pipeline.
6. The sewage discharge device for a coal transportation system according to claim 5, characterized in that: It also includes a branch pipeline, one end of which is connected to the backwash pipeline and is located on the side of the second sewage valve close to the drainage area, and the other end of the branch pipeline is connected to the bottom of the sedimentation area.
7. The sewage discharge device for a coal transportation system according to claim 1, characterized in that: The first end of the drainage pipeline is arranged at the bottom of the drainage area.
8. The sewage discharge device for a coal transportation system according to claim 1, characterized in that: The water outlet of the sewage ditch is arranged above the sedimentation area.
9. The sewage discharge device for a coal transportation system according to claim 1, characterized in that: The aperture of the grille is 50mm*50mm.
10. The sewage discharge device for a coal transportation system according to claim 5, characterized in that: It also includes a control device, which is communicatively connected with the water pump, the first sewage valve, the second sewage valve and the liquid level meter respectively.