A multi-stage filtration coal sinking system for flushing waste coal water

Abstract

The utility model discloses a multi-stage filtration coal sinking system for flushing waste coal water, including: a three-stage coal sinking ditch device and a waste coal water collecting device arranged in a stepped manner from top to bottom, the first coal sinking ditch is arranged horizontally, its inlet end is connected to the tail of the belt-washing coal slag ditch, and a detachable first filter is arranged at the outlet end; the second coal sinking ditch is stepped down to connect the first coal sinking ditch and its cross section is L-shaped, and a second filter is detachably provided at its outlet end; the third coal sinking ditch is stepped down to connect the second coal sinking ditch and its cross section is L-shaped, and a third filter is detachably provided at its outlet end; the inlet end of the waste coal water collecting device is connected to the third coal sinking ditch, a submerged water pump is provided inside, the first filter, the second filter, and the third filter are designed in stages, and an overflow tank is provided on the top side of each filter. The present application adopts multi-stage filtration, the device structure is simple, and the installation is convenient, which can realize the significant reduction and recycling of the coal content in the waste coal water.

Description

Technical Field

[0001] The utility model relates to the technical field of treatment of waste coal flushing water, in particular to a multi-stage filtering coal sinking system for flushing waste coal water. Background Art

[0002] In the coal transportation area of ​​a thermal power plant, when the coal conveyor belt deviates or equipment fails during operation, coal will leak and leak. The treatment after coal leakage is mainly carried out by manual cleaning and then water flushing to clean the coal powder on the ground. On the one hand, the coal sewage generated by water flushing flows into the waste coal pit of the submersible pump along the rainwater ditch. On the other hand, when it rains, rainwater will also carry coal slurry into the rainwater ditch and discharge to the waste coal pit of the submersible pump. After the coal sewage flows into the waste coal pit of the submersible pump along the rainwater ditch, due to sedimentation, coal slag and coal slurry accumulate at the bottom of the sump, causing the following hazards: 1. It accumulates at the inlet and pipeline of the submersible pump, blocking the inlet filter, causing the submersible pump to be unable to pump water; 2. The wear of the submersible pump increases, shortening the service life of the submersible pump; 3. Coal-containing wastewater is easy to cause environmental pollution after entering the coal-containing wastewater pool for fuel transportation; 4. In order to ensure the normal operation of the equipment, special personnel must be arranged to enter the waste coal pit and the coal-containing wastewater pool for fuel transportation for manual dredging on a regular basis, which increases safety risks and labor costs.

[0003] The Chinese utility model patent with publication number CN 105879486 A discloses a coal-containing sewage filtration and recovery device and a filtration and recovery method, which are characterized by comprising a tank body, a discharge port is provided at the bottom of the tank body, and the discharge port is connected to a cage; a valve plate is also provided in the tank body for buckling and covering the discharge port and the sediment to be discharged above the discharge port, and the valve plate is connected to a lifter through a lifting rod; a feed port is provided at the lower part of the tank body, and a filter screen is provided on the feed port for filtering out lumps with a particle size greater than 20 mm; an overflow port is provided at the upper part of the tank body. The filtration and recovery method is to first open the valve plate, and two types of sewage are fed intermittently, and the large particles of coal in the first sewage are deposited to form a filter layer for adsorbing and depositing small particles of coal and mud in the second sewage. After a period of time, the valve plate is closed and the material is discharged by a auger. The utility model is cleverly designed, and utilizes the interaction between the two types of sewage, with low equipment investment, high filtration efficiency, and significant energy-saving and consumption-reducing effects. However, the coal wastewater in this technical solution needs to be classified and treated in advance, and the device cannot be directly applied to the coal transportation system. Moreover, the coal blocks are used as filter layers in this solution, which also has the problem of clogging, which will affect the treatment efficiency of the entire device.

[0004] Based on the above-mentioned problems, this application aims to develop a device for flushing waste coal water and filtering coal sinking, which can be directly connected to the coal transportation system, reducing the consumption and waste of manpower and material resources, effectively treating coal wastewater, and realizing the recycling of coal wastewater. Utility Model Content

[0005] The problem to be solved by the utility model is that the treatment of waste coal in the existing coal conveying system mainly relies on manual labor, and the coal sewage generated at the same time easily causes blockage of the treatment system and environmental pollution, increasing the difficulty and danger of manual cleaning.

[0006] In order to solve the above problems, the utility model provides a multi-stage filtering coal sinking system for flushing waste coal water, comprising: a three-stage coal sinking ditch device and a waste coal water collecting device arranged in a stepped manner from top to bottom, the three-stage coal sinking ditch device comprises a first coal sinking ditch, a second coal sinking ditch and a third coal sinking ditch in sequence from top to bottom, the first coal sinking ditch is horizontally arranged, the inlet end of the first coal sinking ditch is connected to the tail of the belt-flushing coal slag ditch, and the outlet end of the first coal sinking ditch is provided with a detachable first filter screen; the inlet end of the upper part of the second coal sinking ditch is connected to the outlet end of the first coal sinking ditch and then extends vertically downward to the horizontal bottom of the second coal sinking ditch, and the cross section of the second coal sinking ditch is It is L-shaped, and a second filter is detachably provided at the outlet end of the bottom of the second coal sinking ditch; the inlet end of the upper part of the third coal sinking ditch is connected to the outlet end of the second coal sinking ditch and then extends vertically downward to the horizontal bottom of the third coal sinking ditch. The cross-section of the third coal sinking ditch is L-shaped, and a third filter is detachably provided at the outlet end of the bottom of the third coal sinking ditch; the inlet end of the waste coal water collection device is connected to the outlet end of the third coal sinking ditch, and a submersible pump is provided inside the waste coal water collection device, which is used to pump coal-containing waste water to the waste coal water system for combustion and transportation; wherein, the meshes of the first filter, the second filter, and the third filter become denser step by step, and an overflow groove is provided on the top side of each filter.

[0007] According to an embodiment of the present application, the inlet end of the upper part of the second coal sinking ditch is connected to the outlet end of the first coal sinking ditch and extends vertically downward by 100 mm. The inlet end of the upper part of the third coal sinking ditch is connected to the outlet end of the second coal sinking ditch and also extends vertically downward by 100 mm.

[0008] According to an embodiment of the present application, the filter screens of the first filter screen, the second filter screen, and the third filter screen are respectively placed in frames made of flat iron.

[0009] According to an embodiment of the present application, an overflow groove is provided on the upper side of the frame, and the height of the overflow groove is 50 mm.

[0010] According to an embodiment of the present application, the first filter screen, the second filter screen and the third filter screen are all detachably installed in the slide rail through a frame, and the outlet ends of the first coal sinking ditch, the second coal sinking ditch and the third coal sinking ditch are all provided with slide rails.

[0011] According to an embodiment of the present application, two 380V submersible water pumps are installed in the waste coal water collection device, and the submersible water pumps are automatically started and stopped by a built-in float.

[0012] According to an embodiment of the present application, the first filter screen is a #304 / 50 mesh stainless steel filter screen, the second filter screen is a #304 / 100 mesh stainless steel filter screen, and the third filter screen is a #304 / 300 mesh stainless steel filter screen.

[0013] According to an embodiment of the present application, the first coal sinking ditch is located at the tail of the belt-flushing coal slag ditch, and the first coal sinking ditch is 1000 mm long, 300 mm wide, and 400 mm deep.

[0014] According to an embodiment of the present application, the waste coal water collection device is a cube with a length of 1500 mm, a width of 1500 mm, and an inner height of 2000 mm.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0016] 1. The utility model proposes a multi-stage filtering coal-sinking device for flushing waste coal water, and is designed with 3-stage filter screens and 3-stage coal-sinking ditches. The meshes of the 3-stage filter screens are arranged from large to small. The first-stage filter screen filters larger coal particles and settles them in the first-stage coal-sinking ditches; the second-stage filter screen filters small coal particles and settles them in the second-stage coal-sinking ditches; the third-stage filter screen filters fine coal slime and settles them in the third-stage coal-sinking ditches. In this way, the waste coal water entering the waste coal water collection device is treated, and the coal powder particles and the coal content of the waste coal water are significantly reduced, which greatly reduces the number of times workers clean the waste coal water pit, reduces the pressure of silting the waste coal water system, avoids the problems of clogging of the filter device and frequent clogging of the submersible pump inlet and pipeline caused by conventional filtration methods, has good filtration effect and high efficiency, and the circulating water after filtration can be reused, which reduces the consumption and waste of manpower and material resources, enhances personal safety, and improves the normal input rate of equipment and work efficiency.

[0017] 2. The multi-stage filtering coal sinking device for flushing waste coal water of the utility model has a simple structure and is easy to install. The coal sinking ditches at each level can be customized by the manufacturer and are easy to connect to the coal transportation system and waste coal water recycling system of the power plant, and have strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a multi-stage filtering coal sinking system for flushing waste coal water as an example of the utility model.

[0019] The following are the descriptions of the reference numerals:

[0020] 1. Overflow trough, 10. First coal sinking ditch, 11. First filter screen, 20. Second coal sinking ditch, 21. Second filter screen, 30. Third coal sinking ditch, 31. Third filter screen, 40. Waste coal water collection device, 41. Submersible water pump, 42. Float, 50. Waste coal water system for combustion and transportation.

[0021] The arrows represent the direction of water flow. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0023] See also Figure 1 As shown, the utility model shows a multi-stage filtration coal sinking system for flushing waste coal water, including three-stage coal sinking ditch devices and waste coal water collecting devices 40 arranged in a stepped manner from top to bottom, wherein the outlet end of each stage of the coal sinking ditch device is equipped with a corresponding filter screen, and the mesh of the filter screen of the three-stage coal sinking ditch device gradually becomes denser. Compared with the prior art, the coal wastewater of the present application is filtered after three-stage sedimentation, which avoids the accumulation and clogging of coal slag and coal slurry in the waste coal water pit, and the treated coal wastewater can be directly input into the coal-containing wastewater pool for recycling. The whole system has a simple structure and is easy to install. It can be directly applied to the coal transportation system of the power plant and has strong practicality.

[0024] In this embodiment, the three-stage coal sinking water ditch device includes a first coal sinking water ditch 10, a second coal sinking water ditch 20 and a third coal sinking water ditch 30 from top to bottom.

[0025] Specifically, the first coal sinking ditch 10 is horizontally arranged, the inlet end of the first coal sinking ditch 10 is connected to the tail of the belt-washing coal slag ditch, and the outlet end of the first coal sinking ditch 10 is provided with a detachable first filter 11. The first coal sinking ditch 10 is located at the tail of the belt-washing coal slag ditch and extends horizontally, and its size can be 1000mm long, 300mm wide, and 400mm deep; the filter of the first filter 11 is installed in a frame made of flat iron, and the upper part of the frame is provided with an overflow trough 1, and the height of the overflow trough 1 can be 50mm; the outlet end of the first coal sinking ditch 10 is provided with a slide rail, and the frame of the first filter 11 is inserted into the slide rail for fixed installation, and the design of the slide rail facilitates the installation, disassembly and cleaning of the first filter 11.

[0026] Specifically, the inlet end of the upper part of the second coal sinking ditch 20 is connected to the outlet end of the first coal sinking ditch 10 and then extends vertically downward to the horizontal bottom of the second coal sinking ditch 20. The cross-section of the second coal sinking ditch 20 is L-shaped, and the outlet end at the bottom of the second coal sinking ditch 20 is removably provided with a second filter net 21. The second coal sinking ditch 20 is adjacent to the tail of the first coal sinking ditch 10 and dives in a stepped manner. The inlet end of the upper part of the second coal sinking ditch 20 is connected to the outlet end of the first coal sinking ditch 10 and extends vertically downward to a depth of 100mm. The size of the second coal sinking ditch 20 may be 1000mm long, 300mm wide, and 400mm deep. The filter of the second filter 21 is installed in a frame made of flat iron, and an overflow trough 1 is provided on the upper part of the frame. The height of the overflow trough 1 may be 50mm. The outlet end of the second coal sinking ditch 20 is provided with a slide rail, and the frame of the second filter 21 is inserted into the slide rail for fixed installation. The slide rail design facilitates the installation, disassembly and cleaning of the second filter 21.

[0027] Specifically, the inlet end of the upper part of the third coal sinking ditch 30 is connected to the outlet end of the second coal sinking ditch 20 and then extends vertically downward to the horizontal bottom of the third coal sinking ditch 30. The cross section of the third coal sinking ditch 30 is L-shaped, and the outlet end of the bottom of the third coal sinking ditch 30 is detachably provided with a third filter 31. The third coal sinking ditch 30 is located in the third coal sinking ditch 30 and dives in a stepped form. The inlet end of the upper part of the third coal sinking ditch 30 is connected to the outlet end of the second coal sinking ditch 20 and then extends vertically downward by 100mm. The size of the third coal sinking ditch 30 can be 1000mm long, 300mm wide, and 400mm deep. The filter of the third filter 31 is installed in a frame made of flat iron, and an overflow trough 1 is provided on the upper part of the frame. The height of the overflow trough 1 can be 50mm. The outlet end of the third coal sinking ditch 30 is provided with a slide rail, and the frame of the third filter 31 is inserted into the slide rail for fixed installation. The design of the slide rail facilitates the installation, removal and cleaning of the second filter 21.

[0028] The installation of the filter and the frame is not capped, and a certain space is left between the top side of the filter and the upper side of the frame to be designed as an overflow trough 1. The overflow trough 1 is designed to prevent sewage from overflowing the ditch to the outside and causing environmental pollution.

[0029] Specifically, the inlet end of the waste coal water collection device 40 is connected to the outlet end of the third coal sinking ditch 30, and a submerged water pump 41 is provided inside the waste coal water collection device 40, and the submerged water pump 41 is used to transport the coal-containing waste water to the combustion and transportation waste coal water system 50. Preferably, two 380V submerged water pumps 41 are installed in the waste coal water collection device 40, and the submerged water pump 41 is automatically started and stopped by the internal float 42. When the water level of the waste coal water collection device 40 reaches the set position, the float 42 is lifted by the water to the set position, and the submerged water pump 41 is automatically started to transport the waste coal water to the combustion and transportation waste coal water system 50.

[0030] Specifically, the waste coal water collection device 40 may be a cube with a length of 1500 mm, a width of 1500 mm, and an inner height of 2000 mm.

[0031] In this embodiment, the meshes of the first filter screen 11, the second filter screen 21, and the third filter screen 31 are gradually denser. The first filter screen 11, the second filter screen 21, and the third filter screen 31 are all detachably mounted in the slide rail through the frame, and the outlet ends of the first coal sinking ditch 10, the second coal sinking ditch 20, and the third coal sinking ditch 30 are all provided with slide rails, which facilitate the removal and cleaning of the filter screen when it is blocked.

[0032] Specifically, the first filter screen 11 is preferably a #304 / 50 mesh stainless steel filter screen, the second filter screen 21 is preferably a #304 / 100 mesh stainless steel filter screen, and the third filter screen 31 is preferably a #304 / 300 mesh stainless steel filter screen. Layer-by-layer filtration and screening can significantly reduce the coal powder particles and coal slime in the coal wastewater.

[0033] The working process and principle of a multi-stage filtration coal sinking system for flushing waste coal water in the present embodiment are as follows: the device for flushing waste coal water to filter coal sinking includes three levels of coal sinking ditches, each level of coal sinking ditches is 100mm lower than the previous level, and goes down in a stepped manner. A slide rail is designed at the end of each level of coal sinking ditches to facilitate the installation and cleaning of the filter screen. The waste coal water flows from the tail ditch of the coal conveyor belt to the first-level filter screen, where large particles of coal are filtered. When there is a lot of coal accumulated in the first-level coal sinking ditch, the waste coal water can enter the second-level coal sinking ditch from the overflow port of the first-level filter screen. At this time, the workers can clean the accumulated coal in the first-level coal sinking ditch, and the cleaning of the first-level coal sinking ditch can be completed by one worker; the waste coal water continues to flow down through the second-level coal sinking ditch, and filters small coal particles through the second-level filter screen. Similarly, when there is a lot of coal accumulated in the second-level coal sinking ditch, the waste coal water can enter the third-level coal sinking ditch from the overflow port of the second-level filter screen. , at this time, a single worker can also independently complete the cleaning of the second-level coal sinking ditch; the waste coal water containing particulate coal after the second-level filtration is basically filtered out, and continues to flow downward to the third-level coal sinking ditch, and after filtering the coal slime in the waste coal water through the third-level filter net, it enters the coal water ditch and then flows into the waste coal water collection device 40. Similarly, when there is more coal slime in the third-level coal sinking ditch, the waste coal water flows into the waste coal water collection device 40 through the overflow port of the third-level filter net. At this time, a single worker can complete the cleaning of the coal slime in the third-level coal sinking ditch. As a result, the waste coal water entering the waste coal water collection device 40 greatly reduces the waste coal, avoiding the problem that the inlet of the submersible water pump 41 in the waste coal water collection device 40 is blocked by the accumulation of waste coal and affects the normal operation of the equipment, and significantly reducing the workload of cleaning the coal accumulation in the coal sinking pit. If the filter net in the waste coal water filtering coal sinking device is blocked by coal particles, it can be simply disassembled and taken out for flushing. Finally, when the water level of the waste coal water collection device 40 reaches the set position, the float 42 in the waste coal water collection device 40 is lifted by the water to the set position, and the submersible water pump 41 is automatically started, and automatically started and stopped according to the liquid level. The submersible water pump 41 can transport the coal-containing wastewater to the coal-containing wastewater pool for combustion and transportation, thereby realizing the recycling of the coal-containing wastewater.

[0034] Another aspect of the present application discloses the application of the above multi-stage filtration coal sinking system in a waste coal water reuse system. A portion of the coal waste water at the tail of the belt is treated by the multi-stage filtration coal sinking system and then input into the coal sinking tank by the submerged water pump 41. The supernatant of the sedimentation tank is then controlled by the water pump and the solenoid valve to enter the purifier. The liquid treated by the purifier is concentrated in the coal water reuse water pool. The water in the coal water reuse water pool can be used for engineering ash removal, factory road spraying, etc. Another portion of the waste coal water is treated by the multi-stage filtration coal sinking system and then input into the coal sinking tank by the submerged water pump 41. The supernatant output from the coal sinking tank can be used for production project water after overflow, filtration, and wastewater treatment.

[0035] Another aspect of the present application discloses the application of the above-mentioned multi-stage filtering and coal sinking system for washing waste coal water in the coal transportation system. For example, the tail of the 1#, 2#, 4#, and 6# belt conveyors of the power plant coal transportation system are all provided with the above-mentioned multi-stage filtering and coal sinking system for washing waste coal water. When the above-mentioned belt conveyors are in operation, belt deviation, equipment failure, and other reasons may occur during operation, which may cause coal leakage and leakage. The waste coal water generated after manual cleaning and water flushing flows into the waste coal water filtering and coal sinking device in the present application, passes through the 3-stage filter screen and the 3-stage coal sinking ditch, and the waste coal water in the waste coal water pit is treated to reduce a large amount of coal powder particles, greatly reducing the number of times workers clean the waste coal water pit, reducing the pressure of dredging the waste coal water system, and reducing the consumption and waste of manpower and material resources; enhancing personal safety and improving the normal investment rate of equipment.

[0036] In summary, the technical solution of the present application has the following beneficial effects:

[0037] 1. The utility model proposes a multi-stage filtering coal-sinking device for flushing waste coal water, and is designed with 3-stage filter screens and 3-stage coal-sinking ditches. The meshes of the 3-stage filter screens are arranged from large to small. The first-stage filter screen filters larger coal particles and settles them in the first-stage coal-sinking ditches; the second-stage filter screen filters small coal particles and settles them in the second-stage coal-sinking ditches; the third-stage filter screen filters fine coal slime and settles them in the third-stage coal-sinking ditches. In this way, the waste coal water entering the waste coal water collection device is treated, and the coal powder particles and the coal content of the waste coal water are significantly reduced, which greatly reduces the number of times workers clean the waste coal water pit, reduces the pressure of silting the waste coal water system, avoids the problems of clogging of the filter device and frequent clogging of the submersible pump inlet and pipeline caused by conventional filtration methods, has good filtration effect and high efficiency, and the circulating water after filtration can be reused, which reduces the consumption and waste of manpower and material resources, enhances personal safety, and improves the normal input rate of equipment and work efficiency.

[0038] 2. The multi-stage filtering coal sinking device for flushing waste coal water of the utility model has a simple structure and is easy to install. The coal sinking ditches at each level can be customized by the manufacturer and are easy to connect to the coal transportation system and waste coal water recycling system of the power plant, and have strong applicability.

[0039] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage filtration coal sinking system for flushing waste coal water, characterized in that: include: A three-stage coal sinking ditch device and a waste coal water collection device are arranged in a stepped manner from top to bottom, wherein the three-stage coal sinking ditch device includes a first coal sinking ditch, a second coal sinking ditch and a third coal sinking ditch in sequence from top to bottom, The first coal sinking ditch is arranged horizontally, the inlet end of the first coal sinking ditch is connected to the tail end of the belt-flushing coal slag ditch, and the outlet end of the first coal sinking ditch is provided with a detachable first filter screen; The inlet end of the upper part of the second coal sinking ditch is connected to the outlet end of the first coal sinking ditch and then extends vertically downward to the horizontal bottom of the second coal sinking ditch. The cross section of the second coal sinking ditch is L-shaped. The outlet end of the bottom of the second coal sinking ditch is detachably provided with a second filter screen. The inlet end of the upper part of the third coal sinking ditch is connected to the outlet end of the second coal sinking ditch and then extends vertically downward to the horizontal bottom of the third coal sinking ditch. The cross section of the third coal sinking ditch is L-shaped. The outlet end of the bottom of the third coal sinking ditch is detachably provided with a third filter screen. The inlet end of the waste coal water collection device is connected to the outlet end of the third coal sinking water ditch, and a submersible water pump is provided inside the waste coal water collection device, and the submersible water pump is used to pump the coal-containing waste water to the combustion and transportation waste coal water system; The meshes of the first filter screen, the second filter screen and the third filter screen become denser step by step, and an overflow groove is provided on the top side of each filter screen.

2. A multi-stage filtration coal sinking system for washing waste coal water according to claim 1, characterized in that: The inlet end of the upper part of the second coal sinking ditch is connected to the outlet end of the first coal sinking ditch and extends vertically downward to a depth of 100 mm. The inlet end of the upper part of the third coal sinking ditch is connected to the outlet end of the second coal sinking ditch and also extends vertically downward by 100 mm.

3. A multi-stage filtration coal sinking system for washing waste coal water according to claim 1, characterized in that: The filter screens of the first filter screen, the second filter screen and the third filter screen are respectively placed in frames made of flat iron.

4. A multi-stage filtration coal sinking system for washing waste coal water according to claim 3, characterized in that: The upper part of the frame is provided with the overflow trough, and the height of the overflow trough is 50mm.

5. The multi-stage filtration coal sinking system for washing waste coal water according to claim 3 is characterized in that: The first filter screen, the second filter screen and the third filter screen are all detachably installed in the slide rail through the frame, and the outlet ends of the first coal sinking ditch, the second coal sinking ditch and the third coal sinking ditch are all provided with the slide rail.

6. The multi-stage filtration coal sinking system for flushing waste coal water according to claim 1, characterized in that: Two 380V submersible water pumps are installed in the waste coal water collection device, and the submersible water pumps are automatically started and stopped by a built-in float.

7. The multi-stage filtration coal sinking system for washing waste coal water according to claim 1, characterized in that: The first filter screen is a #304 / 50 mesh stainless steel filter screen, the second filter screen is a #304 / 100 mesh stainless steel filter screen, and the third filter screen is a #304 / 300 mesh stainless steel filter screen.

8. The multi-stage filtration coal sinking system for washing waste coal water according to claim 1, characterized in that: The first coal sinking ditch is located at the tail end of the belt-flushing coal slag ditch. The first coal sinking ditch is 1000mm long, 300mm wide and 400mm deep.

9. The multi-stage filtration coal sinking system for washing waste coal water according to claim 1, characterized in that: The waste coal water collection device is a cube with a length of 1500 mm, a width of 1500 mm and an inner height of 2000 mm.

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