Polishing wastewater recycling system

Abstract

The utility model discloses a polishing wastewater recycling system and relates to the technical field of wastewater treatment and recycling. The polishing wastewater recycling system comprises a water storage tank, a polishing module, wastewater treatment equipment and a water supply device, the water storage tank, the polishing module and the wastewater treatment equipment are sequentially arranged from top to bottom, and the polishing module comprises polishing equipment and a drainage groove; the output end of the water storage tank is connected with the water inlet of the polishing equipment; the water outlet of the polishing equipment is connected with the input end of the drainage tank; the wastewater treatment equipment comprises a multi-stage wastewater treatment device, a sludge water tank, squeezing equipment and a sludge pumping device. According to the polishing wastewater recycling system disclosed by the utility model, water resources in the polishing wastewater can be recycled to the maximum extent, a water suction pump can be omitted, waste residues in the polishing wastewater do not need to be manually fished, and the treated waste residues are blocky and are easy to subsequently treat.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment and recycling technical field especially relates to a polishing wastewater recycling system. BACKGROUND

[0002] In the production and processing of metal workpieces, it is inevitable to use a polishing machine to polish the surface of the metal workpiece. A large amount of water is needed in the polishing process, for example, water is needed to wash off the dust and other impurities on the surface of the metal workpiece before polishing; after polishing, water is also needed to clean the metal workpiece to remove the metal powder and polishing wheel wear residues and other residues left on the surface of the metal workpiece during polishing. If these residues are not cleaned, they may affect the subsequent processing or use of the metal workpiece; and during polishing, water is also needed to absorb and remove the heat generated by friction to prevent the metal workpiece from deforming due to overheating.

[0003] In order to save water resources, the commonly used method at present is to set a buffer tank on one side of the polishing machine. The inside of the buffer tank is divided into a clean water pool and a sewage pool by a filter screen. A water supply pump is provided in the clean water pool, and a water suction pump is provided in the sewage pool. The output end of the water supply pump is connected to the water inlet of the polishing machine, and the input end of the water suction pump is connected to the water outlet of the polishing machine. At the beginning of polishing, a certain amount of water is added to the buffer tank through a tap water pipe, and then the water in the clean water pool is pumped to the polishing machine for use by the water supply pump. The waste water generated by the polishing machine is pumped back to the sewage pool by the water suction pump. Due to the action of the filter screen, the waste water in the sewage pool can be filtered to make the relatively clean water flow into the clean water pool, and the filtered water is then pumped to the polishing machine for use by the water supply pump. This method can recycle the polishing waste water to some extent, achieving the purpose of saving water to some extent. However, since the waste water generated by polishing contains metal powder and polishing wheel wear residues, over time, more and more waste residues will accumulate in the sewage pool. In order to prevent the filter screen and the two water pumps from being clogged, the waste residues in the sewage pool need to be manually salvaged and treated regularly, which not only consumes time and effort, but also the salvaged waste residues are usually in a paste-like state and difficult to handle. In addition, some water will be salvaged along with the waste residues during the salvaging process, making it difficult for the polishing waste water to be fully recycled, and even new tap water needs to be added to the clean water pool regularly to make up for the loss of water. In addition, since the water suction pump is used to pump waste water containing a large amount of metal powder and polishing wheel wear residues, it is very easy to cause the water suction pump to overload and burn out, resulting in a short service life. SUMMARY

[0004] The technical problem to be solved by the utility model lies in providing a polishing wastewater recycling system, which can realize the maximum recycling of water resources in polishing wastewater, can save the water pump, and can save manual salvage of waste residues in polishing wastewater and easily treat the blocky waste residues.

[0005] In order to solve the above technical problem, the utility model provides a polishing wastewater recycling system, which comprises a water storage tank, a polishing module, a wastewater treatment equipment and a water supply device, the water storage tank, the polishing module and the wastewater treatment equipment are sequentially arranged from top to bottom, the polishing module comprises a polishing equipment and a drain groove;

[0006] The output end of the water storage tank is connected with the water inlet of the polishing equipment, and the water outlet of the polishing equipment is connected with the input end of the drain groove;

[0007] The wastewater treatment equipment comprises a multistage wastewater treatment device, a sludge tank, a squeezing equipment and a sludge pumping device, the output end of the drain groove is connected with the input end of the multistage wastewater treatment device, the multistage wastewater treatment device is used for carrying out multistage filtration treatment on the polishing wastewater discharged from the drain groove to obtain reuse water and sludge, the sludge pumping device is used for pumping the sludge in the multistage wastewater treatment device to the sludge tank, the output end of the sludge tank is connected with the input end of the squeezing equipment, the squeezing equipment is used for squeezing the sludge to obtain mud blocks and squeezing clean water, the squeezing clean water output end of the squeezing equipment is connected with the squeezing clean water input end of the multistage wastewater treatment device, so that the squeezing clean water and the reuse water are combined to form circulating water, and the water supply device is used for conveying the circulating water to the polishing equipment and the water storage tank.

[0008] As the improvement of the above technical scheme, the multistage wastewater treatment device comprises a treatment tank, a first filtering mechanism and a second filtering mechanism, the first filtering mechanism and the second filtering mechanism are vertically and spacedly arranged in the interior of the treatment tank along the length direction of the treatment tank, so that the interior of the treatment tank is divided into a first stage sedimentation tank, a second stage sedimentation tank and a clean water tank which are sequentially communicated, the first filtering mechanism is used for carrying out first stage filtration on the polishing wastewater, and the second filtering mechanism is used for carrying out second stage filtration on the polishing wastewater;

[0009] The output end of the drain groove is communicated with the first stage sedimentation tank, the squeezing clean water output end of the squeezing equipment is communicated with the clean water tank, the input end of the water supply device is connected with the clean water tank, and the water inlet of the polishing equipment and the circulating water input end of the water storage tank are respectively connected with the output end of the water supply device.

[0010] As the improvement of the above technical scheme, the sludge pumping device comprises a pumping pump, a first sludge pumping pipe, a second sludge pumping pipe and a discharge main pipe, the first sludge pumping pipe is installed on the first-stage sedimentation tank, and the input end of the first sludge pumping pipe is located at the bottom of the first-stage sedimentation tank, the second sludge pumping pipe is installed on the second-stage sedimentation tank, and the input end of the second sludge pumping pipe is located at the bottom of the second-stage sedimentation tank, the output ends of the first sludge pumping pipe and the second sludge pumping pipe are connected with the input end of the pumping pump respectively, the output end of the pumping pump is connected with the input end of the discharge main pipe, and the output end of the discharge main pipe is connected with the input end of the sludge tank.

[0011] As the improvement of the above technical scheme, the sludge pumping device further comprises a first water pumping pipe, a second water pumping pipe, a first water discharging pipe, a second water discharging pipe and a third water discharging pipe.

[0012] The input ends of the first water discharging pipe, the second water discharging pipe and the third water discharging pipe are connected with the discharge main pipe respectively.

[0013] The first water pumping pipe and the first water discharging pipe are both installed on the first-stage sedimentation tank, and the input end of the first water pumping pipe is located at the upper part of the first-stage sedimentation tank, and the output end of the first water discharging pipe is located at the lower part of the first-stage sedimentation tank.

[0014] The second water pumping pipe and the second water discharging pipe are both installed on the second-stage sedimentation tank, and the input end of the second water pumping pipe is located at the upper part of the second-stage sedimentation tank, and the output end of the second water discharging pipe is located at the lower part of the second-stage sedimentation tank.

[0015] The output ends of the first water pumping pipe and the second water pumping pipe are connected with the input end of the pumping pump respectively.

[0016] The third water discharging pipe is installed on the clean water tank.

[0017] As the improvement of the above technical scheme, valves are respectively arranged on the first sludge pumping pipe, the second sludge pumping pipe, the discharge main pipe, the first water pumping pipe, the second water pumping pipe, the first water discharging pipe, the second water discharging pipe and the third water discharging pipe.

[0018] As the improvement of the above technical scheme, the wastewater treatment device further comprises a sludge conveying device, the output end of the sludge tank is connected with the input end of the sludge conveying device, and the output end of the sludge conveying device is connected with the input end of the pressing device.

[0019] As the improvement of the above technical scheme, the polishing wastewater recycling system further comprises a primary filtering device, the primary filtering device is located between the drain tank and the wastewater treatment device, the output end of the drain tank is connected with the input end of the primary filtering device, the primary filtering device is used for removing large-volume solid waste in the polishing wastewater, and the filtered liquid output end of the primary filtering device is communicated with the primary sedimentation tank.

[0020] As the improvement of the above technical scheme, the polishing wastewater recycling system further comprises a primary filtering device, the primary filtering device is located between the drain tank and the wastewater treatment device, the output end of the drain tank is connected with the input end of the primary filtering device, the primary filtering device is used for removing large-volume solid waste in the polishing wastewater, and the filtered liquid output end of the primary filtering device is communicated with the primary sedimentation tank.

[0021] The output end of the first circulating water supply sub-pipe is connected with the input end of the second circulating water supply sub-pipe, the output end of the second circulating water supply sub-pipe is connected with the input end of the third circulating water supply sub-pipe, and the water inlet of the polishing device is connected with the third circulating water supply sub-pipe.

[0022] As the improvement of the above technical scheme, the polishing wastewater recycling system comprises a plurality of water storage tanks and a plurality of polishing modules, and each polishing module is provided with the polishing device and the drain tank.

[0023] The output end of the first circulating water supply sub-pipe is connected with the input end of the second circulating water supply sub-pipe, the output end of the second circulating water supply sub-pipe is connected with the input end of the third circulating water supply sub-pipe, and the water inlet of the polishing device is connected with the third circulating water supply sub-pipe.

[0024] As the improvement of the above technical scheme, the polishing wastewater recycling system further comprises a first wastewater discharge pipe and a second wastewater discharge pipe, the output end of each drain tank is connected with the first wastewater discharge pipe, the output end of the first wastewater discharge pipe is connected with the input end of the second wastewater discharge pipe, and the output end of the second wastewater discharge pipe is connected with the input end of the primary filtering device.

[0025] The polishing wastewater recycling system has the following beneficial effects:

[0026] 1. Through the synergistic effect of the water storage tank, the polishing module, the wastewater treatment device and the water supply device, metal powder and polishing wheel loss residues in the polishing wastewater can be effectively removed, the water resources in the polishing wastewater can be recycled, and the purpose of saving water is achieved.

[0027] 2. The sludge in the multi-stage wastewater treatment device can be pumped to the sludge tank in time through the sludge pumping device, manual fishing of the sludge in the polishing wastewater is not needed, the working intensity of the workers is reduced, and the polishing wastewater treatment efficiency is improved; the sludge is pressed by the pressing device, the metal powder pressed out and the polishing wheel loss residue are solid sludge blocks, the sludge blocks occupy small space and are easy to handle, meanwhile, the water in the sludge can be further recovered by pressing the sludge, the water resource in the polishing wastewater can be recycled to the maximum extent, basically, the water resource can be recycled in a full cycle, basically, no new tap water needs to be added in the long polishing process of the polishing device, the polishing wastewater can be basically zero discharged, and pollution of the polishing wastewater to the environment is avoided.

[0028] 3. The wastewater treatment device is located below the polishing module, the polishing wastewater discharged from the drainage groove can be directly discharged into the multi-stage wastewater treatment device due to the installation height difference, no additional water pump is needed to pump the polishing wastewater, and the use of the water pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the polishing wastewater recycling system in one embodiment of the present application;

[0030] Figure 2 is Figure 1 a structural schematic view of the wastewater treatment device and the water supply device in the polishing wastewater recycling system shown in the figure;

[0031] Figure 3 is Figure 2 an enlarged view of S in the figure;

[0032] Figure 4 is Figure 2 a structural schematic view of the multi-stage wastewater treatment device, the sludge pumping device and the water supply device in the figure;

[0033] In the figure: water storage tank 1, polishing module 2, primary filter equipment 3, wastewater treatment equipment 4, water supply device 5, circulating water supply mother pipe 6, polishing equipment 21, drain tank 22, multi-stage wastewater treatment device 41, sludge tank 42, squeezing equipment 43, sludge pumping device 44, sludge conveying device 45, first circulating water supply sub-pipe 71, second circulating water supply sub-pipe 72, third circulating water supply sub-pipe 73, first wastewater discharge pipe 81, second wastewater discharge pipe 82, treatment tank 411, first filter mechanism 412, second filter mechanism 413, primary sedimentation tank 414, secondary sedimentation tank 415, clear water tank 416, squeezing clear water output end 431, pumping pump 441, first mud pumping pipe 442, second mud pumping pipe 443, discharge mother pipe 444, first water pumping pipe 445, second water pumping pipe 446, first drain pipe 447, second drain pipe 448, third drain pipe 449. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the drawings to make the utility model more detailed description. The utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.

[0035] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In the description of the utility model, it is necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] As shown in Figures 1 to 4 A polishing wastewater recycling system, comprising a water storage tank 1, a polishing module 2, a wastewater treatment equipment 4 and a water supply device 5, the water storage tank 1, the polishing module 2 and the wastewater treatment equipment 4 are arranged from top to bottom in turn, the polishing module 2 comprises a polishing equipment 21 and a drain tank 22;

[0038] The output end of the water storage tank 1 is connected with the water inlet of the polishing device 21, and the water outlet of the polishing device 21 is connected with the input end of the drainage groove 22;

[0039] The wastewater treatment device 4 comprises a multi-stage wastewater treatment device 41, a sludge tank 42, a squeezing device 43 and a sludge pumping device 44. The output end of the drainage groove 22 is connected with the input end of the multi-stage wastewater treatment device 41, which is used for multi-stage filtration treatment of the polishing wastewater discharged from the drainage groove 22 to obtain recycled water and sludge. The sludge pumping device 44 is used for pumping the sludge in the multi-stage wastewater treatment device 41 to the sludge tank 42. The output end of the sludge tank 42 is connected with the input end of the squeezing device 43, which is used for squeezing the sludge to obtain sludge blocks and squeezing clean water. The squeezing clean water output end 431 of the squeezing device 43 is connected with the squeezing clean water input end of the multi-stage wastewater treatment device 41, so that the squeezing clean water and the recycled water are combined to form circulating water. The water supply device 5 is used for delivering the circulating water to the polishing device 21 and the water storage tank 1.

[0040] The polishing device 21, the water storage tank 1, the wastewater treatment device 4 and the water supply device 5 are cooperated to effectively remove the waste residues such as metal powder and polishing wheel loss residues in the polishing wastewater, so that the water resources in the polishing wastewater can be recycled and used, and the water consumption is saved. The sludge in the multi-stage wastewater treatment device 41 can be pumped to the sludge tank 42 by the sludge pumping device 44, so that the manual fishing of the sludge in the polishing wastewater is not needed, the working intensity of the workers is reduced, and the treatment efficiency of the polishing wastewater is improved. The sludge is squeezed by the squeezing device 43, so that the metal powder and the polishing wheel loss residues are solid sludge blocks, which are easy to handle and occupy small space. The water in the sludge can be further recovered by the squeezing treatment, so that the water resources in the polishing wastewater can be recycled to the maximum extent, and basically all the water resources can be recycled. In the long polishing process of the polishing device 21, new tap water is basically not needed, so that the water consumption in the polishing process is effectively saved, the polishing wastewater is basically zero discharged, and the pollution of the polishing wastewater to the environment is avoided. In addition, the wastewater treatment device 4 is located below the polishing module 2, so that the polishing wastewater discharged from the drainage groove 22 can be directly discharged into the multi-stage wastewater treatment device 41 due to the height difference, and the water pump is not needed to pump the polishing wastewater, so that the use of the water pump is reduced.

[0041] Preferably, the squeezing device 43 is a filter press.

[0042] Preferably, the water storage tank 1 is further connected with an external tap water supply pipeline, and the tap water supply pipeline provides raw water for the polishing equipment 21.

[0043] In an embodiment, the multi-stage wastewater treatment device 41 comprises a treatment tank 411, a first filtering mechanism 412 and a second filtering mechanism 413, the first filtering mechanism 412 and the second filtering mechanism 413 are vertically and spacedly arranged inside the treatment tank 411 along the length direction of the treatment tank 411, so that the inside of the treatment tank 411 is divided into a first-stage sedimentation tank 414, a second-stage sedimentation tank 415 and a clean water tank 416 which are sequentially communicated, the first filtering mechanism 412 is used for performing first-stage filtration on the polishing wastewater, and the second filtering mechanism 413 is used for performing second-stage filtration on the polishing wastewater.

[0044] The output end of the drainage groove 22 is communicated with the first-stage sedimentation tank 414, the pressing clean water output end of the pressing device 43 is communicated with the clean water tank 416, the input end of the water supply device 5 is connected with the clean water tank 416, and the water inlet of the polishing equipment 21 is connected with the circulating water input end of the water storage tank 1.

[0045] It is worth noting that, in the embodiment, the polishing wastewater is discharged into the first-stage sedimentation tank 414, the first filtering mechanism 412 is used to perform first-stage filtration on the polishing wastewater, so that the larger waste residues in the polishing wastewater are isolated in the first-stage sedimentation tank 414, and the polishing wastewater which is preliminarily purified enters the second-stage sedimentation tank 415 through the first filtering mechanism 412, and the second filtering mechanism 413 is used to further purify the polishing wastewater, so that the smaller waste residues are isolated in the second-stage sedimentation tank 415, and the clean water obtained through the second-stage filtration enters the clean water tank 416 through the second filtering mechanism 413, the clean water in the clean water tank 416 is the recycled water, the recycled water can be delivered to the polishing equipment 21 through the water supply device 5 for continuous use, and the excess recycled water can also be delivered to the water storage tank 1 through the water supply device 5 for storage, so as to facilitate subsequent use and realize the recycling of the polishing wastewater.

[0046] Preferably, the first filtering mechanism 412 and the second filtering mechanism 413 are both filter screens, and the pore size of the filter screen used by the second filtering mechanism 413 is smaller than that of the filter screen used by the first filtering mechanism 412, so that the polishing wastewater can be subjected to multi-stage filtration treatment, and the recycled water with higher purity can be obtained.

[0047] More preferably, the first filtering mechanism 412 and the second filtering mechanism 413 are both stainless steel filter screens.

[0048] Specifically, the first filtering mechanism 412 and the second filtering mechanism 413 with appropriate pore sizes can be selected according to the particle size of the waste residues in the polishing wastewater.

[0049] In one embodiment, the sludge pumping device 44 comprises a pumping pump 441, a first sludge pumping pipe 442, a second sludge pumping pipe 443, and a discharge main pipe 444, the first sludge pumping pipe 442 is installed on the primary sedimentation tank 414, and the input end of the first sludge pumping pipe 442 is located at the bottom of the primary sedimentation tank 414, the second sludge pumping pipe 443 is installed on the secondary sedimentation tank 415, and the input end of the second sludge pumping pipe 443 is located at the bottom of the secondary sedimentation tank 415, the output end of the first sludge pumping pipe 442 and the output end of the second sludge pumping pipe 443 are respectively connected with the input end of the pumping pump 441, the output end of the pumping pump 441 is connected with the input end of the discharge main pipe 444, and the output end of the discharge main pipe 444 is connected with the input end of the sludge tank 42.

[0050] The waste residues in the primary sedimentation tank 414 and the secondary sedimentation tank 415 respectively deposit at the lower part to form sludge, and the sludge in the primary sedimentation tank 414 and the secondary sedimentation tank 415 respectively can be pumped to the sludge tank 42 by the pumping pump 441, and then the sludge is pressed by the pressing equipment 43 to obtain mud blocks and pressed clean water, the mud blocks are in solid state, easy to handle and small in storage space, and the clean water obtained by pressing is returned to the clean water tank 416 through a pipeline and combined with the recycled water in the clean water tank to obtain circulating water.

[0051] Preferably, the pumping pump 441 is a gas pump, when the sludge is thick and difficult to pump, the gas pump can add gas to the sludge to improve the fluidity of the sludge and reduce the density of the sludge, so that the pumping pump can more effectively pump the sludge, thereby improving the efficiency in the pumping process.

[0052] In one embodiment, the sludge pumping device 44 further comprises a first water pumping pipe 445, a second water pumping pipe 446, a first water discharging pipe 447, a second water discharging pipe 448, and a third water discharging pipe 449;

[0053] The input ends of the first water discharging pipe 447, the second water discharging pipe 448, and the third water discharging pipe 449 are respectively connected with the discharge main pipe 444;

[0054] The first water pumping pipe 445 and the first water discharging pipe 447 are both installed on the primary sedimentation tank 414, and the input end of the first water pumping pipe 445 is located at the upper part of the primary sedimentation tank 414, and the output end of the first water discharging pipe 447 is located at the lower part of the primary sedimentation tank 414;

[0055] The second pumping pipe 446 and the second draining pipe 448 are both installed on the secondary sedimentation tank 415, and the input end of the second pumping pipe 446 is located at the upper part of the secondary sedimentation tank 415, and the output end of the second draining pipe 448 is located at the lower part of the secondary sedimentation tank 415.

[0056] The output ends of the first pumping pipe 445 and the second pumping pipe 446 are connected with the input end of the pumping and draining pump 441.

[0057] The third draining pipe 449 is installed on the clean water tank 416.

[0058] It is worth mentioning that after the polishing wastewater in the primary sedimentation tank 414 and the secondary sedimentation tank 415 is left to stand for a period of time, the waste residue will be deposited at the lower part of the sedimentation tank to form sludge, and the upper part of the sedimentation tank will be relatively clear clean water. At this time, the clean water at the upper part of the primary sedimentation tank 414 can be directly pumped and drained to the secondary sedimentation tank 415 or the clean water tank 416 by the pumping and draining pump 441, and the clean water at the upper part of the secondary sedimentation tank 415 can be directly pumped and drained to the clean water tank 416 by the pumping and draining pump 441. In addition, when the sludge is relatively thick, it may be difficult for the pumping and draining pump 441 to pump and drain the sludge. At this time, the clean water at the upper part of the primary sedimentation tank 414 can be pumped up by the cooperation of the pumping and draining pump 441 and the first pumping pipe 445, and discharged to the lower part of the primary sedimentation tank 414 through the first draining pipe 447, so as to dilute the sludge, thereby facilitating the pumping and draining of the sludge. Furthermore, this process can simultaneously charge the sludge with gas, thereby being more conducive to the pumping and draining of the sludge. The sludge pumping and draining process of the secondary sedimentation tank 415 is also the same. If the sludge in the secondary sedimentation tank 415 is relatively thick and not conducive to pumping and draining, the clean water at the upper part of the secondary sedimentation tank 415 can be pumped up by the cooperation of the pumping and draining pump 441 and the second pumping pipe 446, and discharged to the lower part of the secondary sedimentation tank 415 through the second draining pipe 448, so as to dilute the sludge, thereby facilitating the pumping and draining of the sludge, and thereby pumping and draining the sludge to the sludge water tank 42.

[0059] In an embodiment, valves are respectively arranged on the first sludge pumping pipe 442, the second sludge pumping pipe 443, the draining main pipe 444, the first water pumping pipe 445, the second water pumping pipe 446, the first draining pipe 447, the second draining pipe 448 and the third draining pipe 449, so that each pipe can be controlled individually, thereby selectively opening or closing a specific pipe according to actual needs.

[0060] It is worth noting that the valve in the draining main pipe 444 is arranged between the third draining pipe 449 and the sludge water tank 42.

[0061] In an embodiment, the wastewater treatment device 4 further comprises a sludge conveying device 45, the output end of the sludge tank 42 is connected with the input end of the sludge conveying device 45, and the output end of the sludge conveying device 45 is connected with the input end of the squeezing device 43. The sludge conveying device 45 can convey the sludge in the sludge tank 42 to the squeezing device 43, so that the squeezing device 43 can squeeze the sludge to obtain sludge blocks and squeezed clean water.

[0062] Preferably, the sludge conveying device 45 is a screw pump.

[0063] In an embodiment, the polishing wastewater recycling system further comprises a primary filtration device 3, which is located between the drain tank 22 and the wastewater treatment device 4, the output end of the drain tank 22 is connected with the input end of the primary filtration device 3, the primary filtration device 3 is used for removing large-volume solid waste in the polishing wastewater, and the filtered liquid output end of the primary filtration device 3 is communicated with the primary sedimentation tank 414. The primary filtration device 3 can remove the large-volume solid waste in the polishing wastewater, so as to avoid the large-volume solid waste from blocking the pumping device 441.

[0064] Specifically, the primary filtration device 3 can be any device capable of removing large-volume solid waste in wastewater.

[0065] In an alternative embodiment of the present application, the primary filtration device 3 comprises a filter tank and a primary filter screen, the primary filter screen is installed on the upper portion of the filter tank, and the bottom of the filter tank is communicated with the primary sedimentation tank 414. The polishing wastewater discharged from the drain tank 22 falls into the filter tank after being filtered by the primary filter screen, and then enters the primary sedimentation tank 414 through the filter tank. The primary filter screen can remove large-volume solid waste in the wastewater. Specifically, the primary filter screen with a proper aperture can be selected according to the size of the large-volume solid waste. For example, the aperture of the primary filter screen can be 2mm-15mm.

[0066] In an embodiment, the polishing wastewater recycling system further comprises a circulating water supply main pipe 6, a first circulating water supply sub-pipe 71, a second circulating water supply sub-pipe 72 and a third circulating water supply sub-pipe 73, the output end of the water supply device 5 is connected with the input end of the circulating water supply main pipe 6, and the first circulating water supply sub-pipe 71, the second circulating water supply sub-pipe 72 and the third circulating water supply sub-pipe 73 are respectively connected with the output end of the circulating water supply main pipe 6.

[0067] The input end of the circulating water of the water storage tank 1 is connected with the output end of the first circulating water supply sub-pipe 71, the output end of the water storage tank 1 is connected with the second circulating water supply sub-pipe 72, the second circulating water supply sub-pipe 72 is connected with the third circulating water supply sub-pipe 73, and the water inlet of the polishing equipment 21 is connected with the third circulating water supply sub-pipe 73. Through the cooperation of the water supply device 5, the circulating water supply main pipe 6 and the third circulating water supply sub-pipe 73, the circulating water can be directly delivered to the polishing equipment 21; through the cooperation of the water supply device 5, the circulating water supply main pipe 6 and the first circulating water supply sub-pipe 71, the circulating water can be delivered to the water storage tank 1, and then the circulating water is delivered to the polishing equipment 21 for use through the water storage tank 1. Through the buffering effect of the water storage tank, the circulating water can be more stably provided to the polishing equipment 21.

[0068] Preferably, the second circulating water supply sub-pipe 72 is also connected with an external water-using equipment, and the excess circulating water can be delivered to the external water-using equipment for use.

[0069] In an embodiment, the polishing wastewater recycling system comprises a plurality of water storage tanks 1 and a plurality of polishing modules 2, and each polishing module 2 is provided with the polishing equipment 21 and the drain tank 22.

[0070] The input end of each of the plurality of water storage tanks 1 is connected with the first circulating water supply sub-pipe 71, the output end of each of the plurality of water storage tanks 1 is connected with the second circulating water supply sub-pipe 72, and the water inlet of each of the plurality of polishing equipment 21 is connected with the third circulating water supply sub-pipe 73.

[0071] The polishing wastewater recycling system of the embodiment can process the polishing wastewater generated by the plurality of polishing equipment 21, so that the polishing wastewater can be recycled. When in use, only one water supply device 5 is needed to supply water to the plurality of polishing equipment 21, which can effectively reduce the preparation cost and operation cost of the system.

[0072] Preferably, the water supply device 5 is a water pump.

[0073] More preferably, a standby water supply device 5 can be additionally provided, so that when one of the water supply devices 5 is damaged, the standby water supply device 5 can be quickly replaced to ensure the normal operation of the system.

[0074] In an embodiment, the polishing wastewater recycling system further comprises a first wastewater discharge pipe 81 and a second wastewater discharge pipe 82, the output ends of the plurality of water drainage tanks 22 are connected with the first wastewater discharge pipe 81 respectively, the output end of the first wastewater discharge pipe 81 is connected with the input end of the second wastewater discharge pipe 82, and the output end of the second wastewater discharge pipe 82 is connected with the input end of the primary filtration device 3.

[0075] Specifically, the working process of the polishing wastewater recycling system of the embodiment is as follows:

[0076] (1) In the initial stage of system operation, a certain amount of water is introduced into the water storage tank 1 through an external tap water supply pipeline to provide a raw water source for the system;

[0077] (2) The raw water source in the water storage tank 1 enters the polishing device 21 in sequence through the second circulating water supply sub-pipe 72 and the third circulating water supply sub-pipe 73, the polishing wastewater after use of the polishing device 21 passes through the primary filtration device 3 for primary filtration to remove large-volume solid waste in the polishing wastewater, and the polishing wastewater after primary filtration falls to the primary sedimentation tank 414 through a pipeline;

[0078] (3) The secondary filtered clear water is obtained in the clear water tank 416 through the filtering action of the first filtration mechanism 412 and the second filtration mechanism 413, and after a period of standing, the clear water in the upper part of the primary sedimentation tank 414 and the secondary sedimentation tank 415 is pumped to the clear water tank 416 through the pumping pump 441, and the sludge in the lower part of the primary sedimentation tank 414 and the secondary sedimentation tank 415 is pumped to the sludge tank 42 through the pumping pump 441;

[0079] (4) The sludge in the sludge tank 42 is transported to the pressing device 43 through the sludge conveying device 45, the sludge is pressed by the pressing device 43 to obtain mud blocks and pressing clear water, the pressing clear water flows back to the clear water tank 416, and the recycled water in the clear water tank 416 is combined to form circulating water, which is pumped to the water storage tank 1 and the polishing device 21 through the water supply device 5, so that the polishing wastewater is recycled.

[0080] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will fall within the protection scope of the present application.

Claims

1. A polishing wastewater recycling system, characterized in that, It includes a water storage tank, a polishing module, a wastewater treatment device, and a water supply device, wherein the water storage tank, the polishing module, and the wastewater treatment device are arranged sequentially from top to bottom, and the polishing module includes polishing equipment and a drainage tank; The output end of the water storage tank is connected to the inlet of the polishing equipment, and the outlet of the polishing equipment is connected to the input end of the drainage trough. The wastewater treatment equipment includes a multi-stage wastewater treatment unit, a sludge tank, a pressing device, and a sludge pumping device. The output end of the drainage trough is connected to the input end of the multi-stage wastewater treatment unit. The multi-stage wastewater treatment unit is used to perform multi-stage filtration treatment on the polishing wastewater discharged from the drainage trough to obtain recycled water and sludge. The sludge pumping device is used to pump the sludge from the multi-stage wastewater treatment unit to the sludge tank. The output end of the sludge tank is connected to the input end of the pressing device. The pressing device is used to press the sludge to obtain mud blocks and press water. The press water output end of the pressing device is connected to the press water input end of the multi-stage wastewater treatment unit, so that the press water and the recycled water are combined to form circulating water. The water supply device is used to transport the circulating water to the polishing equipment and the water storage tank.

2. The polishing wastewater recycling system according to claim 1, characterized in that, The multi-stage wastewater treatment device includes a treatment tank, a first filtration mechanism, and a second filtration mechanism. The first filtration mechanism and the second filtration mechanism are vertically arranged and spaced apart inside the treatment tank along its length, so that the interior of the treatment tank is divided into a primary sedimentation tank, a secondary sedimentation tank, and a clear water tank that are connected in sequence. The first filtration mechanism is used to perform primary filtration of polishing wastewater, and the second filtration mechanism is used to perform secondary filtration of polishing wastewater. The output end of the drainage trough is connected to the primary sedimentation tank, the output end of the pressing water from the pressing equipment is connected to the clear water tank, the input end of the water supply device is connected to the clear water tank, and the inlet of the polishing equipment and the circulating water input end of the water storage tank are respectively connected to the output end of the water supply device.

3. The polishing wastewater recycling system according to claim 2, characterized in that, The sludge pumping device includes a pumping pump, a first sludge pumping pipe, a second sludge pumping pipe, and a discharge header. The first sludge pumping pipe is installed in the primary sedimentation tank, and its input end is located at the bottom of the primary sedimentation tank. The second sludge pumping pipe is installed in the secondary sedimentation tank, and its input end is located at the bottom of the secondary sedimentation tank. The output ends of the first and second sludge pumping pipes are respectively connected to the input end of the pumping pump. The output end of the pumping pump is connected to the input end of the discharge header. The output end of the discharge header is connected to the input end of the sludge tank.

4. The polishing wastewater recycling system according to claim 3, characterized in that, The sludge pumping device also includes a first pumping pipe, a second pumping pipe, a first drain pipe, a second drain pipe, and a third drain pipe; The inlet ends of the first drain pipe, the second drain pipe, and the third drain pipe are respectively connected to the main discharge pipe; Both the first pumping pipe and the first draining pipe are installed in the primary sedimentation tank, with the input end of the first pumping pipe located at the upper part of the primary sedimentation tank and the output end of the first draining pipe located at the lower part of the primary sedimentation tank. Both the second pumping pipe and the second draining pipe are installed in the secondary sedimentation tank, with the input end of the second pumping pipe located at the upper part of the secondary sedimentation tank and the output end of the second draining pipe located at the lower part of the secondary sedimentation tank. The output ends of the first pumping pipe and the second pumping pipe are respectively connected to the input end of the pumping pump; The third drainage pipe is installed in the clear water tank.

5. The polishing wastewater recycling system according to claim 4, characterized in that, Valves are provided on the first sludge suction pipe, the second sludge suction pipe, the discharge main pipe, the first water suction pipe, the second water suction pipe, the first drain pipe, the second drain pipe, and the third drain pipe.

6. The polishing wastewater recycling system according to claim 1, characterized in that, The wastewater treatment equipment also includes a sludge conveying device, the output end of the sludge tank is connected to the input end of the sludge conveying device, and the output end of the sludge conveying device is connected to the input end of the pressing equipment.

7. The polishing wastewater recycling system according to claim 2, characterized in that, The polishing wastewater recycling system also includes a primary filtration device, which is located between the drainage tank and the wastewater treatment equipment. The output end of the drainage tank is connected to the input end of the primary filtration device. The primary filtration device is used to remove large-volume solid waste from the polishing wastewater. The filtrate output end of the primary filtration device is connected to the primary sedimentation tank.

8. The polishing wastewater recycling system according to claim 7, characterized in that, The polishing wastewater recycling system also includes a main circulating water supply pipe, a first circulating water supply sub-pipe, a second circulating water supply sub-pipe, and a third circulating water supply sub-pipe. The output end of the water supply device is connected to the input end of the main circulating water supply pipe, and the first circulating water supply sub-pipe, the second circulating water supply sub-pipe, and the third circulating water supply sub-pipe are respectively connected to the output end of the main circulating water supply pipe. The water storage tank's circulating water input end is connected to the output end of the first circulating water supply subpipe, the water storage tank's output end is connected to the second circulating water supply subpipe, the second circulating water supply subpipe is connected to the third circulating water supply subpipe, and the polishing equipment's water inlet is connected to the third circulating water supply subpipe.

9. The polishing wastewater recycling system according to claim 8, characterized in that, The polishing wastewater recycling system includes several water storage tanks and several polishing modules, each of which is equipped with the polishing equipment and the drainage tank; The circulating water input ends of several water storage tanks are respectively connected to the first circulating water supply sub-pipe, the output ends of several water storage tanks are respectively connected to the second circulating water supply sub-pipe, and the water inlets of several polishing devices are respectively connected to the third circulating water supply sub-pipe.

10. The polishing wastewater recycling system according to claim 9, characterized in that, The polishing wastewater recycling system also includes a first wastewater discharge pipe and a second wastewater discharge pipe. The output ends of the plurality of drainage tanks are respectively connected to the first wastewater discharge pipe. The output end of the first wastewater discharge pipe is connected to the input end of the second wastewater discharge pipe. The output end of the second wastewater discharge pipe is connected to the input end of the primary filtration device.

Images