CN112496895B - Grinding fluid centralized treatment system for roll grinder and grinding fluid recovery method - Google Patents

Abstract

The invention discloses a grinding fluid centralized treatment system for a roll grinder and a grinding fluid recovery method, and belongs to the field of roll grinder equipment. The processing system comprises a grinding machine body, a water storage tank communicated with a grinding area of the grinding machine body, and a filtering component communicated with a water return tank of the grinding machine body, wherein the filtering component is also communicated with the water storage tank, and comprises a filtrate tank, a driven roller, a driving roller, a filtering medium, a vacuum cavity and a pressure sensor, the top end of the filtrate tank is communicated with the water return tank, the driven roller is rotatably connected with one end of the filtrate tank, the driving roller is rotatably connected with the other end of the filtrate tank, the filtering medium is in sleeve fit with the driven roller and the driving roller at two ends, the vacuum cavity is in butt fit with the bottom end of the filtering medium, and the pressure sensor is fixedly arranged in the vacuum cavity.

Description

Grinding fluid centralized treatment system for roll grinder and grinding fluid recovery method

Technical Field

The invention belongs to the field of roll grinder equipment, and particularly relates to a centralized processing system and a recovery method of grinding fluid for a roll grinder.

Background

The working method of the conventional grinding fluid recovery equipment is realized by filtering grinding fluid through a filter medium and then refluxing the grinding fluid into a water storage tank.

Disclosure of Invention

The purpose of the invention is as follows: the grinding fluid centralized processing system for the roll grinder and the grinding fluid recovery method are provided to solve the problems in the prior art.

The technical scheme is as follows: the grinding fluid centralized processing system for the roll grinder comprises: the grinding machine comprises a grinding machine body, a water storage tank communicated with a grinding area of the grinding machine body, and a filtering assembly communicated with a water return tank of the grinding machine body, wherein the filtering assembly is further communicated with the water storage tank, and grinding liquid is stored in the water storage tank.

The filter component comprises a filtrate tank, a driven roller, a driving roller, a filter medium, a pressure sensor and a water storage tank, wherein the top end of the filtrate tank is communicated with the return water tank, the driven roller is connected with one end of the filtrate tank in a rotating mode, the driving roller is connected with the other end of the filtrate tank in a rotating mode, the two ends of the filter medium are connected with the driven roller and the driving roller in a sleeved mode, the vacuum chamber is matched with the bottom end of the filter medium in an abutted mode, the pressure sensor is fixedly installed in the vacuum chamber, and the vacuum chamber is communicated with the water storage tank.

After the grinding fluid and the impurities enter the filter fluid pool, the grinding fluid is sucked into the vacuum cavity by the negative pressure of the vacuum cavity and then is conveyed to the water storage tank, the impurities are adsorbed on the upper surface of the filter medium, when the pressure sensor detects that the pressure in the vacuum cavity reaches a preset value, the driving roller rolls the filter medium above the vacuum cavity, and the filter medium to be processed on the driven roller is conveyed to the position above the vacuum cavity.

The pressure sensor is used for detecting the pressure in the vacuum cavity, when the pressure does not reach a preset value, the filter medium is not fully utilized, when the pressure in the vacuum cavity reaches the preset value, the filter medium is replaced, and the problem that the utilization area of the filter medium is fixed to cause low utilization rate of the filter medium in the prior art can be solved.

When the pressure reaches a preset value, the driving roller rolls the filter medium above the vacuum cavity, the filter medium to be processed on the driven roller can be conveyed to the position above the vacuum cavity to achieve the effect of replacing the filter medium, and the problems that the filter medium is frequently replaced and the manual replacement efficiency is low in the prior art are solved.

In a further embodiment, one side of the initiative roller of the filter assembly is fixedly provided with a waste residue dehumidifying system, the waste residue dehumidifying system comprises a scraper blade matched with the butt of a filter medium, a diaphragm pump communicated with the water storage tank, a lower slag box communicated with the diaphragm pump and an upper slag box detachably connected with the lower slag box, and the upper slag box is located at the position below the scraper blade.

The bottom of the upper-layer slag box is of a grid structure, wool felts are further paved above the grid structure, and the lower-layer slag box is a sealed cavity.

The scraper blade scrapes the moisture impurity on filter medium surface and falls to the upper slag box in, when impurity reached the predetermined amount, starts the diaphragm pump and forms the negative pressure chamber in lower floor's slag box, and the grinding fluid in the impurity is inhaled in the lower floor's slag box by the negative pressure and is discharged to the storage water tank in by the diaphragm pump.

The water content of the impurities treated by the negative pressure dehumidification method is below 7 percent, so that the method is suitable for customers and areas with high requirements on the water content of waste residues and environmental protection, the magnetic loss does not exist in the dehumidification process, the problem of high failure rate of the existing equipment is solved by rigid contact with the impurities, and the water liquid in the impurities is discharged into the water storage tank by the diaphragm pump again, so that the recovery and utilization rate of the grinding liquid is improved.

In a further embodiment, the grinding fluid centralized treatment system for the roll grinder further comprises a flushing system, wherein the flushing system comprises a sewage pump communicated with the water storage tank, a water tank cleaning assembly fixedly connected with the sewage pump, and the water tank cleaning assembly are connected in parallel at the water outlet end of the sewage pump.

The water tank cleaning assembly comprises a water tank flushing nozzle and a sewage pump.

The water tank cleaning assembly comprises at least two water tank flushing ball valves communicated with the sewage pump and at least two rows of water tank flushing nozzles communicated with the water tank flushing ball valves, the water tank flushing nozzles are matched with the water tank flushing ball valves in a one-to-one correspondence mode, the water tank flushing ball valves are connected to the water outlet end of the sewage pump in parallel, the water tank flushing nozzles are fixedly installed at the bottom end of the water storage tank, and the bottom end of the water storage tank is of an inclined surface structure.

When the water tank flushing ball valve is in a closed state, the sewage pump pumps out the grinding fluid from the water storage tank to continuously flush the water return tank. When the water tank flushing ball valve is in an open state, the sewage pump discharges the grinding fluid in the water storage tank out of the water storage tank and simultaneously flushes impurities deposited at the bottom of the tank by using the pumped grinding fluid.

Set up to the inclined plane structure through the bottom with the storage water tank, can be with can making the long-pending sediment in the storage water tank toward water tank one side deposit, take out the grinding fluid through the dredge pump in following the storage water tank and wash the wet return in succession, can solve impurity and deposit in the wet return and reduce wet return collecting capacity, lead to the problem that grinding fluid recovery ability reduces, when needs wash the storage water tank, on one side with the grinding fluid discharge box in the storage water tank through the dredge pump, utilize the grinding fluid of taking out to wash the impurity of deposiing at the bottom of the case on one side, can play the effect of flush tank, and can filter impurity once more in washing impurity and carrying to the wet return, improve the purifying effect to the grinding fluid.

In a further embodiment, the grinding fluid centralized processing system for the roll grinder further comprises a fluid infusion system, wherein the fluid infusion system comprises an online concentration monitor, a stock solution tank and a water purification tank which are communicated with the water storage tank, the online concentration monitor is respectively electrically connected with the stock solution tank and the water purification tank, and the online concentration monitor detects the concentration and the liquid level of the grinding fluid in the water storage tank.

When the concentration on-line monitor detects that the concentration and the liquid level of the grinding fluid in the water storage tank reach a preset range, the concentration on-line monitor controls the stock solution tank and the water purification tank to supplement a preset amount of the grinding fluid stock solution and the clean water into the water storage tank.

The concentration of the grinding fluid in the water storage tank can be detected in real time through the concentration on-line monitor, the total amount of the stock solution and the clear water which need to be supplemented is calculated by comparing the current concentration value with the target set concentration value, the problems that the volume of the grinding fluid in the using process and the filtering process in the prior art is lost, the working effect of the grinding fluid is reduced due to the fact that the ratio of the stock solution and the water is changed, and the problem that the use time efficiency is shortened after the stock solution and the clear water are mixed in the prior art can be solved through the real-time supplement of the stock solution.

In a further embodiment, the grinding fluid centralized treatment system for the roll grinder further comprises an oxygen increasing system, the oxygen increasing system comprises an air compression assembly and an oxygen increasing device communicated with the air compression assembly, the oxygen increasing device is fixedly installed in the water storage tank, and the oxygen increasing system supplies oxygen to the water storage tank at intervals of preset time.

The oxygen supplementing system can be used for periodically supplementing oxygen to the water tank, so that the proliferation speed of anaerobic bacteria can be reduced, and the use time of the grinding fluid can be prolonged.

In a further embodiment, an oil-water separation system is further fixedly mounted between the filtering assembly and the grinding machine body, the oil-water separation system comprises an oil-water separation tank and a flush water pump communicated with the oil-water separation tank, and the flush water pump is further communicated with a water storage tank.

The water inlet of the oil-water separation tank is communicated with the water return tank and the water storage tank, and the water outlet of the oil-water separation tank is communicated with the filtering component.

The grinding fluid mixed with lubricating oil and impurities in the water return tank is discharged into the oil-water separation tank, the oil-water separation tank is used for carrying out oil-water separation on the grinding fluid mixed with the lubricating oil and the impurities, the oil-water separation tank is used for discharging the separated lubricating oil to a preset position, and the grinding fluid mixed with the impurities after separation is discharged into a filtrate pool of the filtering component.

When the oil-water separation tank is used for a preset time, the washing water pump extracts grinding fluid from the water storage tank to clean the oil-water separation tank, and discharges cleaned dirty fluid into a filtering fluid pool of the filtering component, wherein in the process of cleaning the oil-water separation tank, the oil-water separation tank simultaneously performs oil-water separation.

The oil-water separation system can separate the oil from the grinding fluid mixed with the lubricating oil and impurities, can separate the lubricating oil mixed in the grinding fluid, can solve the problem that the filtering system in the prior art can only filter solid impurities and can not filter the liquid lubricating oil, reduces the degree of pollution of the grinding fluid by oil stains, and improves the use timeliness of the grinding fluid.

In a further embodiment, the grinding fluid centralized treatment system for the roll grinder further comprises a waste oil recovery and purification system, wherein the waste oil recovery and purification system comprises a transfer oil tank communicated with the oil-water separation tank, an oil purifier communicated with the transfer oil tank and a liquid level meter fixedly installed in the transfer oil tank.

The oil outlet of the transfer oil tank is communicated with an oil purifier, the oil outlet of the oil purifier is communicated with a lubricating oil system of the grinding machine body, and the water outlet of the oil purifier is communicated with the filtering assembly.

When the liquid level meter monitors that the volume of the waste oil in the transfer oil tank reaches a preset value, the oil purifier extracts the waste oil from the transfer oil tank for oil purification treatment, and conveys the purified lubricating oil to the lubricating oil system and the grinding fluid to the filtering assembly.

The lubricating oil is stored to a preset volume through the transfer oil tank and then is conveyed to the oil purifier to be purified, the problem that in the prior art, the lubricating oil cannot be recovered after being separated due to the fact that the volume of the lubricating oil after being separated is too small at every time and further purification and recovery cannot be performed is solved, the purified lubricating oil is conveyed to a lubricating oil system, grinding fluid is conveyed to a filter assembly, the problem that the environment pollution caused by the fact that the lubricating oil separated in the prior art is directly discharged is solved, and the problem of lubricating oil waste is solved.

In a further embodiment, the filter assembly further comprises at least one limiting roller fixedly arranged between the driving roller and the driven roller, the pressure sensor is electrically connected with the driving roller, the limiting roller is in abutting fit with the lower surface of the filter medium, the driving roller, the driven roller and the limiting roller are distributed in a U shape, and the filter medium is influenced by the gravity of the grinding fluid and impurities and the negative pressure of the vacuum cavity to be in an arc shape above the vacuum cavity.

The filter medium is only supported by the limiting roller fixedly arranged on the lower surface of the filter medium, the gravity of grinding fluid and impurities is utilized, the filter medium is arc-shaped above the vacuum cavity due to negative pressure influence of the vacuum cavity, the contact area and the contact time of the filter medium, the grinding fluid and the impurities can be increased, the utilization rate of the filter medium is improved, rigid contact between the limiting roller and the impurities in the prior art is also solved, abrasion and erosion are caused to the limiting roller, the impurities above the filter medium are further compacted by the limiting roller, the impurities penetrate through the filter medium under pressure to pollute the vacuum cavity, and the problem that the scraper is worn out for a long time due to overlarge impurity density and rigidity when impurities are subsequently scraped is solved.

In a further embodiment, the grinding fluid centralized processing system for the roll grinder further comprises a magnetic roller filter fixedly installed between the water return tank of the grinder body and the filtering component, one end of the magnetic roller filter is communicated with the water return tank of the grinder body, the other end of the magnetic roller filter is communicated with the filtering component, the magnetic roller filter sucks magnetic impurities in the grinding fluid and then discharges the grinding fluid, most of metal magnetic impurities such as scrap iron in dirty fluid can be separated out through the magnetic roller filter to reduce the load of the filtering medium, the grinding fluid separated by the magnetic roller filter flows into the filtering medium again, the damage of the metal magnetic impurities such as the scrap iron to the filtering medium can be avoided, and the service life of the filtering medium is effectively prolonged.

The grinding fluid recovery method based on the grinding fluid centralized treatment system for the roll grinder comprises the following steps: s1, when the grinding machine body works, the water storage tank provides grinding fluid for a grinding area of the grinding machine body, the water return tank conveys the grinding fluid and impurities into the oil-water separation system, the oil-water separation system conveys lubricating oil in the grinding fluid into a transfer oil tank of a waste oil recovery and purification system, the oil-water separation system conveys the separated grinding fluid and impurities into the filtering component, the filtering component conveys the impurities into the waste residue dehumidifying system, and the filtering component conveys the filtered grinding fluid into the water storage tank.

And S2, monitoring the volume of the waste oil in the transfer oil tank in real time by the liquid level meter in the transfer oil tank, extracting the waste oil from the transfer oil tank by the oil purifier for oil purification treatment when the volume of the waste oil in the transfer oil tank is monitored by the liquid level meter to reach a preset value, conveying the purified lubricating oil to a lubricating oil system by the oil purifier, and conveying the purified and separated grinding fluid to the filtering component.

S3, when the impurity in the upper slag box of the waste residue dehumidifying system reaches a preset amount, the diaphragm pump is started to form a negative pressure cavity in the lower slag box, grinding fluid in the impurity is sucked into the lower slag box by negative pressure and is discharged into the water storage tank by the diaphragm pump, and when the impurity in the upper slag box after being dehumidified exceeds a preset value, the upper slag box and the lower slag box are separated and replaced by a new upper slag box.

S4, when the grinding machine body works, the water tank flushing ball valve is in a closed state, and the sewage pump pumps grinding fluid out of the water storage tank to continuously flush the water return tank. The grinding machine body stops working after working for a preset time, the water tank flushing ball valve is in an open state, the sewage pump discharges grinding fluid in the water storage tank out of the water storage tank, and simultaneously discharges the grinding fluid and impurities out of the water storage tank after impurities deposited at the bottom of the tank are flushed by the pumped grinding fluid.

And S5, when the grinding machine works, the concentration online monitor monitors the concentration and the liquid level of the grinding fluid in the water storage tank in real time, and when the concentration and the liquid level of the grinding fluid in the water storage tank reach a preset range, the concentration online monitor controls the stock solution tank and the water purification tank to supplement a preset amount of the grinding fluid stock solution and clean water into the water storage tank.

And S6, when the grinding fluid is used for a preset time, the oxygen increasing system supplies oxygen to the water storage tank.

In a further embodiment, when the pressure in the vacuum cavity is in a preset range, the grinding fluid in the filtrate tank is sucked into the vacuum cavity by the negative pressure of the vacuum cavity and then is conveyed to the water storage tank, and impurities are adsorbed on the upper surface of the filter medium and are blocked in the filtrate tank.

When the pressure sensor detects that the pressure in the vacuum cavity is reduced to the lower limit of a preset range or below, the driving roller rolls the filter medium above the vacuum cavity, and the filter medium to be processed on the driven roller is conveyed to the upper side of the vacuum cavity.

When the pressure sensor detects that the pressure in the vacuum cavity rises to the upper limit of a preset range or above, the driving roller conveys the filter medium to the driven roller, the lower surface of the filter medium is in butt fit with the vacuum cavity, and the filter medium above the vacuum cavity is in an arc shape under the influence of impurities and the negative pressure of the vacuum cavity.

Has the advantages that: the invention discloses a grinding fluid centralized processing system for a roll grinder and a grinding fluid recovery method.

When the pressure reaches a preset value, the driving roller rolls the filter medium above the vacuum cavity, the filter medium to be processed on the driven roller can be conveyed to the position above the vacuum cavity to achieve the effect of replacing the filter medium, and the problems that the filter medium is frequently replaced and the manual replacement efficiency is low in the prior art are solved.

The contact position of the filter medium and the grinding fluid is changed by replacing the filter medium through the active roller in a rolling mode, and the pressure in the vacuum cavity is detected through the pressure sensor, so that the utilization rate of the filter medium is improved, the replacement frequency of the filter medium is reduced, and the replacement efficiency of the filter medium is also improved.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention.

Fig. 2 is a schematic front perspective view of the present invention.

FIG. 3 is a schematic view of a slag dehumidifying system of the present invention.

FIG. 4 is a schematic view of a magnetic roller filter according to an embodiment of the present invention

The reference numerals shown in fig. 1 to 4 are: the device comprises a grinding machine body 1, a water storage tank 2, a filtering component 3, a waste residue dehumidifying system 4, a flushing system 5, a liquid supplementing system 6, an oxygenation system 7, an oil-water separating system 8, a waste oil recycling and purifying system 9, a magnetic roller filter 10, a filtrate tank 31, a vacuum cavity 32, a driven roller 33, a driving roller 34, a filtering medium 35, a pressure sensor 36, a scraper 41, a diaphragm pump 42, a lower-layer residue tank 43, an upper-layer residue tank 44, a sewage pump 51, a water tank cleaning component 52, a water tank cleaning component 53, an online concentration monitor 61, a raw liquid tank 62, a water purifying tank 63, an air compression component 71, an oxygenation device 72, an oil-water separating tank 81, a flushing water pump 82, a transfer oil tank 91, an oil purifier 92, a wool felt 441, a water tank flushing nozzle 531 and a water tank flushing ball valve 532.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

The applicant finds that the working method of the conventional grinding fluid recovery device is realized by filtering the grinding fluid through a filter medium and then refluxing the grinding fluid into a water storage tank, in the technology, the filter medium is fixedly connected with a machine tool, the grinding fluid passes through the filter medium from a fixed position, and the problems of low utilization rate of the filter medium, frequent and high replacement of the filter medium and low replacement efficiency caused by fixed utilization area of the filter medium exist.

This grinding fluid centralized processing system for roll grinder includes: the device comprises a grinding machine body 1, a water storage tank 2, a filtering component 3, a waste residue dehumidifying system 4, a flushing system 5, a liquid supplementing system 6, an oxygenation system 7, an oil-water separating system 8, a waste oil recycling and purifying system 9, a grinding area 11, a filtrate tank 31, a vacuum cavity 32, a driven roller 33, a driving roller 34, a filtering medium 35, a pressure sensor 36, a scraper 41, a diaphragm pump 42, a lower-layer residue tank 43, an upper-layer residue tank 44, a sewage pump 51, a water tank cleaning component 52, a water tank cleaning component 53, an online concentration monitor 61, a stock solution tank 62, a water purifying tank 63, an air compression component 71, an oxygenation device 72, an oil-water separating tank 81, a flushing water pump 82, a transit oil tank 91, an oil purifier 92, a wool felt 441, a water tank flushing nozzle 531 and a water tank flushing ball valve 532.

The grinding machine body 1 comprises a grinding area, a water return tank and a lubricating oil system, the lubricating oil system is communicated with the grinding area, grinding fluid is sprayed out to assist machining when the grinding area machines a workpiece, and the sprayed grinding fluid drives impurities on the surface of the workpiece and lubricating oil leaked from the lubricating oil system to flow into the water return tank.

The grinding fluid is stored in the water storage tank 2, the water storage tank 2 is communicated with the grinding area of the grinding machine body 1, wherein the water outlet end of the water storage tank 2 is connected with a high-pressure liquid supply pump and a low-pressure liquid supply pump in parallel, the water outlet ends of the high-pressure liquid supply pump and the low-pressure liquid supply pump are communicated with the same precision filter, the precision filter can select a cloth bag precision filter, a high-pressure water pump is started during high-speed grinding, the low-pressure water pump is started during common grinding, water outlet of the water pump enters a grinding area through the cloth bag precision filter, the requirement of high-end cold rolling and aluminum foil industries on impurities in the grinding fluid is high, and the requirement of the cloth bag precision filter can be met.

One end of the filter component 3 is communicated with a water return tank of the grinding machine body 1, the other end is communicated with the water storage tank 2, the filter component 3 comprises a filtrate tank 31, the top end of which is communicated with the water return tank, a driven roller 33 which is rotationally connected with one end of the filtrate tank 31, a driving roller 34 which is rotationally connected with the other end of the filtrate tank 31, a filter medium 35, the two ends of which are in sleeve joint with the driven roller 33 and the driving roller 34, a vacuum chamber 32 which is in butt joint with the bottom end of the filter medium 35, and a pressure sensor 36 which is fixedly installed in the vacuum chamber 32, the vacuum chamber 32 is communicated with the water storage tank 2, and a roots fan is fixedly installed in the vacuum chamber 32, wherein the filter medium 35 is a filter layer such as filter paper or a filter screen, the driving roller 34 is in transmission connection with a drag chain motor, and the drag chain motor provides rotary power for the driving roller 34.

Grinding fluid and impurities in a water return tank of the grinding machine body 1 enter a filtering fluid pool 31 and then flow to the upper surface of a filtering medium 35 above a vacuum cavity 32, the grinding fluid is sucked into the vacuum cavity 32 by the negative pressure of the vacuum cavity 32 and then is conveyed to a water storage tank 2, the impurities are adsorbed on the upper surface of the filtering medium 35, when a pressure sensor 36 detects that the pressure in the vacuum cavity 32 is reduced to a preset value, the upper surface of the filtering medium 35 is covered by the impurities, at the moment, a driving roller 34 winds the filtering medium 35 above the vacuum cavity 32, and the filtering medium 35 to be worked on a driven roller 33 is conveyed to the position above the vacuum cavity 32.

The working principle is as follows: when the grinding machine body 1 works, grinding fluid is conveyed from the water storage tank 2 to a grinding area, the grinding fluid in the grinding area is collected into a water return tank along with impurities, then the grinding fluid is conveyed into a filtrate tank 31 of the filter component 3 from the water return tank, when the grinding machine body 1 works, a Roots blower extracts gas in the vacuum cavity 32 to generate negative pressure, a vacuum state is gradually formed to accelerate the speed of the grinding fluid passing through the filter medium 35, the impurities form a thick filter cake on the filter medium 35, a pressure sensor 36 detects the pressure in the vacuum cavity 32, when the pressure does not reach a preset value, the filter medium 35 is not fully utilized, the pressure in the vacuum cavity 32 is gradually reduced along with the increase of the impurities on the upper surface of the filter medium 35, and when the pressure in the vacuum cavity 32 is reduced to the preset value, a drag chain motor drives the driving roller 34 to roll the filter medium 35 above the vacuum cavity 32.

The contact position of the filter medium 35 and the grinding fluid is changed by replacing the filter medium 35 through the mode that the driving roller 34 winds the filter medium 35, and the pressure in the vacuum cavity 32 is detected through the pressure sensor 36, so that the utilization rate of the filter medium 35 is improved, the replacement frequency of the filter medium 35 is reduced, and the replacement efficiency of the filter medium 35 is also improved.

In a further embodiment, the Roots blower in the prior art exhausts the air in the vacuum chamber 32 directly into the air, which causes a waste of energy.

In order to solve the above problem, the filter assembly 3 further comprises an exhaust fan, wherein an air inlet end of the exhaust fan is communicated with the vacuum cavity 32, and an air outlet end of the exhaust fan is communicated with the filtrate tank 31.

Through the inlet end and the vacuum cavity 32 intercommunication with the air exhauster, the pressure differential that vacuum cavity 32 and filtrating pond 31 can be increased to the end of giving vent to anger and filtrating pond 31 intercommunication improves filter assembly 3's filtration efficiency, can also get up the air utilization of the end of giving vent to anger of air exhauster and solve the extravagant problem of energy consumption.

In a further embodiment, the moisture content of the impurities recovered by the existing magnetic roller extrusion type is more than 10%, so that the environmental protection requirement is difficult to meet, and the magnetic roller filter has the problem of high failure rate due to magnetic loss and rigid contact with the impurities.

In order to solve the above problem, a waste residue dehumidifying system 4 is fixedly mounted on one side of the driving roller 34 of the filter assembly 3, the waste residue dehumidifying system 4 comprises a scraper 41 in abutting fit with the filter medium 35, a diaphragm pump 42 communicated with the water storage tank 2, a lower layer slag box 43 communicated with the diaphragm pump 42, and an upper layer slag box 44 detachably connected with the lower layer slag box 43, and the upper layer slag box 44 is located below the scraper 41.

The bottom end of the upper-layer slag box 44 is of a grid structure, wool felt 441 is laid above the grid structure, the lower-layer slag box 43 is a sealed cavity, and ear pieces are fixedly arranged on the side surface of the upper-layer slag box 44 as shown in fig. 3, so that the upper-layer slag box 44 and the lower-layer slag box 43 can be detached conveniently.

The scraper 41 scrapes the impurities containing water on the surface of the filter medium 35 into the upper layer slag box 44, when the impurities reach a preset amount, the diaphragm pump 42 is started to form a negative pressure cavity in the lower layer slag box 43, and the grinding fluid in the impurities is sucked into the lower layer slag box 43 by the negative pressure and is discharged into the water storage tank 2 by the diaphragm pump 42.

The water content of the impurities treated by the negative pressure dehumidification method is below 7 percent, so that the method is suitable for customers and areas with high requirements on the water content of waste residues and environmental protection, no magnetic loss exists in the dehumidification process, the problem of high failure rate of the existing equipment is solved by rigid contact with the impurities, and the water liquid in the impurities is discharged into the water storage tank 2 by the diaphragm pump 42 again, so that the recovery rate of the grinding liquid is improved.

In a further embodiment, a small amount of fine impurities in the prior art can penetrate through the filter medium 35 and enter the water storage tank 2 to affect the grinding fluid recycling effect, and the water return tank is used for recycling the grinding fluid only by gravity, so that the impurities are easily precipitated to reduce the liquid collecting capacity of the water return tank, and the grinding fluid recycling capacity is reduced.

In order to solve the problems, the grinding fluid centralized treatment system for the roll grinder further comprises a flushing system 5, wherein the flushing system 5 comprises a sewage pump 51 communicated with the water storage tank 2, a water tank cleaning component 52 fixedly connected with the sewage pump 51 and a water tank cleaning component 53 fixedly connected with the sewage pump 51, and the water tank cleaning component 52 and the water tank cleaning component 53 are connected in parallel at the water outlet end of the sewage pump 51.

The sink cleaning assembly 52 includes a sink flush nozzle with a sewage pump 51.

The water tank cleaning component 53 comprises at least two water tank flushing ball valves 532 communicated with the sewage pump 51 and at least two rows of water tank flushing nozzles 531 communicated with the water tank flushing ball valves 532, the water tank flushing nozzles 531 are matched with the water tank flushing ball valves 532 in a one-to-one correspondence manner, the water tank flushing ball valves 532 are connected to the water outlet end of the sewage pump 51 in parallel, the water tank flushing nozzles 531 are fixedly installed at the bottom end of the water storage tank 2, and the bottom end of the water storage tank 2 is of an inclined plane structure.

When the water tank flushing ball valve 532 is in a closed state, the sewage pump 51 pumps grinding fluid out of the water storage tank 2 to continuously flush the water return tank. When the water tank flushing ball valve 532 is in an open state, the sewage pump 51 flushes impurities deposited on the bottom of the tank by the pumped grinding fluid while discharging the grinding fluid in the water storage tank 2 out of the water storage tank 2.

Set up to the inclined plane structure through the bottom with storage water tank 2, can be with can making the long-pending sediment in the storage water tank 2 toward water tank one side deposit, take out grinding fluid from storage water tank 2 through dredge pump 51 and wash the wet return in succession, can solve impurity and deposit in the wet return and reduce wet return collecting capacity, lead to the problem that grinding fluid recovery capacity reduces, when needs wash storage water tank 2, on one side with the grinding fluid discharge box in the storage water tank 2 through dredge pump 51, utilize the grinding fluid of taking out to wash away the impurity of deposiing at the bottom of the case on one side, can play the effect of flush tank, and wash away impurity and carry and can filter impurity once more in the wet return, improve the purifying effect to grinding fluid.

In a further embodiment, the grinding fluid recycling system in the prior art filters impurities in the grinding fluid for direct use, but the volume of the grinding fluid is lost in the use and filtering processes of the grinding fluid, the proportion of stock solution and water is changed, the working effect of the grinding fluid is reduced, and the problem of shortened use time after the stock solution and clean water are mixed in the prior art is solved.

In order to solve the problems, the grinding fluid centralized treatment system for the roll grinder further comprises a fluid infusion system 6, the fluid infusion system 6 comprises an online concentration monitor 61, a stock solution tank 62 and a water purification tank 63 which are communicated with the water storage tank 2, the online concentration monitor 61 is electrically connected with the stock solution tank 62 and the water purification tank 63 respectively, and the online concentration monitor 61 detects the concentration and the liquid level of the grinding fluid in the water storage tank 2.

When the concentration on-line monitor 61 detects that the concentration and the liquid level of the grinding fluid in the water storage tank 2 reach the preset range, the concentration on-line monitor 61 controls the stock solution tank 62 and the clear water tank 63 to supplement the preset amount of the grinding fluid stock solution and the clean water into the water storage tank 2.

The concentration of the grinding fluid in the water storage tank 2 can be detected in real time through the concentration on-line monitor 61, the total amount of the stock solution and the clear water which need to be supplemented is calculated by comparing the current concentration value with the target set concentration value, the problems that the volume of the grinding fluid in the using process and the volume of the grinding fluid in the filtering process in the prior art are lost, the working effect of the grinding fluid is reduced due to the fact that the ratio of the stock solution and the water is changed, and the problem that the use time efficiency is shortened after the stock solution and the clear water are mixed in the prior art can be solved through the real-time supplement of the stock solution.

In a further embodiment, anaerobic bacteria can grow in the grinding fluid after the grinding fluid is used for a long time, so that the grinding fluid is emulsified and smelled, and the problem of reduction of the use time of the grinding fluid is caused.

In order to solve the problems, the grinding fluid centralized processing system for the roll grinder further comprises an oxygen increasing system 7, the oxygen increasing system 7 comprises an air compression assembly 71 and an oxygen increasing device 72 communicated with the air compression assembly 71, the oxygen increasing device 72 is fixedly installed in the water storage tank 2, the oxygen increasing system 7 supplies oxygen to the water storage tank 2 at intervals of preset time, the oxygen increasing device 72 is an oxygen cake fixedly installed in the water storage tank 2, the air compression assembly 71 comprises an air pump and a pneumatic triple piece, meanwhile, the air compression assembly 71 is also communicated with the diaphragm pump 42 to provide clean compressed air for the diaphragm pump 42, a power source is saved, the production cost is reduced, and the failure rate of the diaphragm pump 42 is also reduced.

The oxygen increasing system 7 can be used for periodically supplying oxygen to the water tank, so that the proliferation speed of anaerobic bacteria can be reduced, and the use time of the grinding fluid can be prolonged.

In a further embodiment, the working environment of the roll grinder is complex, lubricating oil is mixed into the grinding fluid in use, and the filtering system in the prior art can only filter solid impurities and cannot filter liquid lubricating oil, so that the problems that the grinding fluid is seriously polluted by oil stains and the use time of the grinding fluid is reduced are caused.

In order to solve the problems, an oil-water separation system 8 is fixedly arranged between the filtering component 3 and the grinding machine body 1, the oil-water separation system 8 comprises an oil-water separation tank 81 and a flushing water pump 82 communicated with the oil-water separation tank 81, and the flushing water pump 82 is also communicated with the water storage tank 2.

The water inlet of the oil-water separation tank 81 is communicated with the water return tank and the water storage tank 2, and the water outlet is communicated with the filtering component 3.

The grinding fluid mixed with the lubricating oil and the impurities in the water return tank is discharged into the oil-water separation tank 81, the oil-water separation tank 81 is used for carrying out oil-water separation on the grinding fluid mixed with the lubricating oil and the impurities, the oil-water separation tank 81 is used for discharging the separated lubricating oil to a preset position, and the grinding fluid mixed with the impurities after separation is discharged into the filtrate tank 31 of the filtering component 3.

After the oil-water separation tank 81 is used for a preset time, the washing water pump 82 extracts grinding fluid from the water storage tank 2 to clean the oil-water separation tank 81, and discharges the cleaned dirty fluid to the filtrate tank 31 of the filter assembly 3, wherein the oil-water separation tank 81 simultaneously performs oil-water separation in the process of cleaning the oil-water separation tank 81.

Through water oil separating system 8 to the grinding fluid oil-water separation who thoughtlessly has lubricating oil and impurity, can separate the lubricating oil who mixes in the grinding fluid, can solve prior art's filtration system and only can filter the unable problem of filtering liquid lubricating oil of solid impurity, reduced the degree that the grinding fluid received greasy dirt pollution, improved the use prescription of grinding fluid.

In a further embodiment, the reason why the separated lubricating oil cannot be recovered in the prior art is that the volume of the lubricating oil after each separation is too small to perform further purification and recovery, and the direct discharge of the separated lubricating oil not only has the problem of environmental pollution, but also has the problem of lubricating oil waste.

In order to solve the above problem, the grinding fluid centralized processing system for the roll grinder further comprises a waste oil recovery and purification system 9, wherein the waste oil recovery and purification system 9 comprises a transfer oil tank 91 communicated with the oil-water separation tank 81, an oil purifier 92 communicated with the transfer oil tank 91, and a liquid level meter fixedly installed in the transfer oil tank 91.

An oil outlet of the transfer oil tank 91 is communicated with an oil purifier 92, an oil outlet of the oil purifier 92 is communicated with a lubricating oil system of the grinding machine body 1, and a water outlet of the oil purifier 92 is communicated with the filter assembly 3.

When the liquid level meter monitors that the volume of the waste oil in the transfer oil tank 91 reaches a preset value, the oil purifier 92 extracts the waste oil from the transfer oil tank 91 for oil purification treatment, and the oil purifier 92 conveys the purified lubricating oil to the lubricating oil system and conveys the grinding fluid to the filtering component 3.

Through the oil purification of the transfer tank 91 in the oil purifier 92 after accumulating lubricating oil to the predetermined volume, the problem that the lubricating oil after the separation in the prior art can not be recovered because the volume of the lubricating oil after the separation is too small at every turn and further purification and recovery can not be carried out is solved, and the purified lubricating oil is conveyed to a lubricating oil system, the grinding fluid is conveyed to the filter assembly 3, and the problems of environmental pollution and lubricating oil waste caused by the fact that the lubricating oil separated in the prior art is directly discharged are solved.

In a further embodiment, in order to increase the contact area and contact time between the filter medium 35 and the grinding fluid and impurities and improve the utilization rate of the filter medium 35, two limiting rollers are fixedly mounted above the filter medium 35 to make the filter medium 35 above the vacuum chamber 32U-shaped, but the limiting rollers in the technology are fixedly mounted above the filter medium 35 to make rigid contact with the impurities, which not only causes abrasion and erosion to the limiting rollers, but also further compacts the impurities above the filter medium 35, causes the impurities to penetrate through the filter medium 35 under pressure to pollute the vacuum chamber 32, and causes the problem that the density and rigidity of the impurities are too high when the impurities are subsequently scraped, resulting in the problem that the scraper 41 is worn for a too long life.

In order to solve the above problems, the filter assembly 3 further comprises at least one limiting roller fixedly installed between the driving roller 34 and the driven roller 33, the pressure sensor 36 is electrically connected with the driving roller 34, the limiting roller is in abutting fit with the lower surface of the filter medium 35, the driving roller 34, the driven roller 33 and the limiting roller are distributed in a U shape, and the filter medium 35 is in an arc shape above the vacuum chamber 32 under the influence of the gravity of the grinding fluid and impurities and the negative pressure of the vacuum chamber 32.

The limiting roller is fixedly arranged on the lower surface of the filter medium 35 and only supports the filter medium 35, gravity of grinding fluid and impurities is utilized, the filter medium 35 is in an arc shape above the vacuum cavity 32 due to negative pressure influence of the vacuum cavity 32, the contact area and the contact time of the filter medium 35 and the grinding fluid and the impurities can be increased, the utilization rate of the filter medium 35 is improved, the problems that in the prior art, the limiting roller is in rigid contact with the impurities, abrasion and erosion are caused to the limiting roller, the impurities above the filter medium 35 are further compacted by the limiting roller, the impurities are pressed to penetrate through the filter medium 35 to pollute the vacuum cavity 32, and the problem that the scraper 41 is abraded and has a long service life due to the fact that the density and the rigidity of the impurities are too large when the impurities are subsequently scraped are solved.

In a further embodiment, workpieces processed by the conventional grinding machine are usually made of metal materials such as iron, sharp magnetic impurities are usually generated during grinding, and the sharp magnetic impurities easily damage the filter medium when contacting the filter medium, so that the impurities pass through the filter medium and directly enter the filter tank, the filter effect cannot be achieved, and the service life of the filter medium is also shortened.

In order to solve the problems, the grinding fluid centralized processing system for the roll grinder further comprises a magnetic roller filter 10 fixedly installed between the water return tank of the grinder body and the filter assembly, one end of the magnetic roller filter 10 is communicated with the water return tank of the grinder body, the other end of the magnetic roller filter 10 is communicated with the filter assembly, and the magnetic roller filter 10 sucks magnetic impurities in the grinding fluid and then discharges the grinding fluid.

Can separate out most metal magnetism impurity such as iron fillings in dirty liquid through magnetic roller filter 10 to alleviate filter media's load, the grinding fluid after magnetic roller filter 10 separation flows into filter media again, can avoid metal magnetism impurity such as iron fillings to cause the injury to filter media, the effectual life who prolongs filter media.

The grinding fluid recovery method of the grinding fluid centralized processing system for the roll grinder in combination with the embodiment comprises the following steps: s1, when the grinding machine body 1 works, the water storage tank 2 provides grinding fluid for a grinding area of the grinding machine body 1, the water return tank conveys the grinding fluid and impurities into the oil-water separation system 8, the oil-water separation system 8 conveys lubricating oil in the grinding fluid into the transfer oil tank 91 of the waste oil recovery and purification system 9, the oil-water separation system 8 conveys the separated grinding fluid and impurities into the filtering component 3, the filtering component 3 conveys the impurities into the waste residue dehumidifying system 4, and the filtering component 3 conveys the filtered grinding fluid into the water storage tank 2.

S2, a liquid level meter in the transfer oil tank 91 monitors the volume of the waste oil in the transfer oil tank 91 in real time, when the liquid level meter monitors that the volume of the waste oil in the transfer oil tank 91 reaches a preset value, an oil purifier 92 extracts the waste oil from the transfer oil tank 91 for oil purification treatment, the oil purifier 92 conveys the purified lubricating oil to a lubricating oil system, the purified and separated grinding fluid is conveyed to the filtering component 3, after the oil-water separation tank 81 is used for preset time, a washing water pump 82 extracts the grinding fluid from the water storage tank 2 to clean the oil-water separation tank 81, and discharges the cleaned dirty fluid to a filtrate tank 31 of the filtering component 3, wherein the oil-water separation tank 81 performs oil-water separation while the oil-water separation tank 81 is cleaned.

S3, when the impurity in the upper slag box 44 of the waste slag dehumidifying system 4 reaches a preset amount, the diaphragm pump 42 is started to form a negative pressure cavity in the lower slag box 43, the grinding fluid in the impurity is sucked into the lower slag box 43 by negative pressure and is discharged into the water storage tank 2 by the diaphragm pump 42, and when the impurity in the upper slag box 44 after being dehumidified exceeds the preset value, the upper slag box 44 and the lower slag box 43 are separated and replaced by a new upper slag box 44.

S4, when the grinding machine body 1 works, the water tank flushing ball valve 532 is in a closed state, the sewage pump 51 pumps grinding fluid from the water storage tank 2 to continuously flush the water return tank, the grinding machine body 1 stops working after working for a preset time, the water tank flushing ball valve 532 is in an open state, the sewage pump 51 discharges the grinding fluid in the water storage tank 2 out of the water storage tank 2 while flushing impurities deposited at the bottom of the grinding machine body by the pumped grinding fluid and then discharges the grinding fluid and the impurities out of the water storage tank 2.

And S5, when the grinding machine works, the concentration online monitor 61 monitors the concentration and the liquid level of the grinding fluid in the water storage tank 2 in real time, and when the concentration and the liquid level of the grinding fluid in the water storage tank 2 reach a preset range, the concentration online monitor 61 controls the stock solution tank 62 and the purified water tank 63 to supplement a preset amount of the grinding fluid stock solution and the clean water into the water storage tank 2.

S6, when the grinding fluid is used for a preset time, the oxygen increasing system 7 supplies oxygen to the water storage tank 2.

When the pressure in the vacuum chamber 32 is within the predetermined range in S1, the grinding fluid in the filtrate tank 31 is sucked into the vacuum chamber 32 by the negative pressure of the vacuum chamber 32 and then is transferred to the water storage tank 2, and the impurities are adsorbed on the upper surface of the filter medium 35 and blocked in the filtrate tank 31.

When the pressure sensor 36 detects that the pressure in the vacuum chamber 32 is reduced to the lower limit of the predetermined range or below, the driving roller 34 winds up the filter medium 35 above the vacuum chamber 32 and sends the filter medium 35 to be worked on the driven roller 33 to the upper side of the vacuum chamber 32.

When the pressure sensor 36 detects that the pressure in the vacuum chamber 32 rises to the upper limit of the predetermined range or above, the driving roller 34 conveys the filter medium 35 toward the driven roller 33, the lower surface of the filter medium 35 is in abutting fit with the vacuum chamber 32, and the filter medium 35 above the vacuum chamber 32 is curved under the influence of the impurities and the negative pressure of the vacuum chamber 32.

Claims (10)

1. Grinding fluid centralized processing system for roll grinder, its characterized in that includes: the grinding machine comprises a grinding machine body, a water storage tank communicated with a grinding area of the grinding machine body, a filtering assembly communicated with a water return tank of the grinding machine body, and a liquid supplementing system communicated with the water storage tank, wherein the filtering assembly is also communicated with the water storage tank, and grinding liquid is stored in the water storage tank;

the filter assembly comprises a filtrate tank, a driven roller, a driving roller, a filter medium, a vacuum chamber and a pressure sensor, wherein the top end of the filtrate tank is communicated with the return water tank;

after grinding fluid and impurities enter a filtering fluid pool, the grinding fluid is sucked into a vacuum cavity by negative pressure of the vacuum cavity and then is conveyed to a water storage tank, the impurities are adsorbed on the upper surface of a filtering medium, when a pressure sensor detects that the pressure in the vacuum cavity reaches a preset value, a driving roller winds the filtering medium above the vacuum cavity, and a to-be-processed filtering medium on a driven roller is conveyed to the upper part of the vacuum cavity;

a waste residue dehumidifying system is fixedly mounted on one side of the driving roller of the filtering assembly and comprises a scraper plate in butt fit with the filtering medium, a diaphragm pump communicated with the water storage tank, a lower layer slag box communicated with the diaphragm pump and an upper layer slag box detachably connected with the lower layer slag box, wherein the upper layer slag box is positioned below the scraper plate;

the scraper blade scrapes the moisture impurity on filter medium surface and falls to the upper slag box in, when impurity reached the predetermined amount, starts the diaphragm pump and forms the negative pressure chamber in lower floor's slag box, and the grinding fluid in the impurity is inhaled in the lower floor's slag box by the negative pressure and is discharged to the storage water tank in by the diaphragm pump.

2. The centralized processing system of grinding fluid for a roll grinder as claimed in claim 1, wherein the bottom end of the upper layer slag box is of a grid structure, wool felt is laid above the grid structure, and the lower layer slag box is a sealed cavity.

3. The centralized processing system of grinding fluid for a roll grinder as claimed in claim 1, further comprising a flushing system, wherein the flushing system comprises a sewage pump communicated with the water storage tank, a water tank cleaning assembly fixedly connected with the sewage pump, and the water tank cleaning assembly are connected in parallel at the water outlet end of the sewage pump;

the water tank cleaning component comprises a water tank flushing nozzle of a sewage pump;

the water tank cleaning assembly comprises at least two water tank flushing ball valves communicated with the sewage pump and at least two rows of water tank flushing nozzles communicated with the water tank flushing ball valves, the water tank flushing nozzles are matched with the water tank flushing ball valves in a one-to-one correspondence mode, the water tank flushing ball valves are connected to the water outlet end of the sewage pump in parallel, the water tank flushing nozzles are fixedly installed at the bottom end of the water storage tank, and the bottom end of the water storage tank is of an inclined surface structure;

when the water tank flushing ball valve is in a closed state, the sewage pump pumps out the grinding fluid from the water storage tank to continuously flush the water return tank; when the water tank flushing ball valve is in an open state, the sewage pump discharges the grinding fluid in the water storage tank out of the water storage tank and simultaneously flushes impurities deposited at the bottom of the tank by using the pumped grinding fluid.

4. The centralized processing system of the grinding fluid for the roll grinder as claimed in claim 1, wherein the fluid replacement system comprises an online concentration monitor, a stock solution tank and a clean water tank which are communicated with the water storage tank, the online concentration monitor is respectively electrically connected with the stock solution tank and the clean water tank, and the online concentration monitor detects the concentration and the liquid level of the grinding fluid in the water storage tank;

when the concentration on-line monitor detects that the concentration and the liquid level of the grinding fluid in the water storage tank reach a preset range, the concentration on-line monitor controls the stock solution tank and the water purification tank to supplement a preset amount of the grinding fluid stock solution and the clean water into the water storage tank.

5. The centralized processing system of grinding fluid for a roll grinder as claimed in claim 4, further comprising an oxygen increasing system, wherein the oxygen increasing system comprises an air compression assembly and an oxygen increasing device communicated with the air compression assembly, the oxygen increasing device is fixedly installed in the water storage tank, and the oxygen increasing system supplies oxygen to the water storage tank at intervals of preset time.

6. The centralized processing system of the grinding fluid for the roll grinder as claimed in claim 1, wherein an oil-water separation system is further fixedly installed between the filtering component and the grinder body, the oil-water separation system comprises an oil-water separation tank and a flush water pump communicated with the oil-water separation tank, and the flush water pump is further communicated with a water storage tank;

the water inlet of the oil-water separation tank is communicated with the water return tank and the water storage tank, and the water outlet of the oil-water separation tank is communicated with the filtering component;

the grinding fluid mixed with lubricating oil and impurities in the water return tank is discharged into an oil-water separation tank, the oil-water separation tank is used for carrying out oil-water separation on the grinding fluid mixed with the lubricating oil and the impurities, the oil-water separation tank is used for discharging the separated lubricating oil to a preset position, and the grinding fluid mixed with the impurities after separation is discharged into a filtrate pool of the filtering component;

when the oil-water separation tank is used for a preset time, the washing water pump extracts grinding fluid from the water storage tank to clean the oil-water separation tank, and discharges cleaned dirty fluid into a filtering fluid pool of the filtering component, wherein in the process of cleaning the oil-water separation tank, the oil-water separation tank simultaneously performs oil-water separation.

7. The centralized processing system of grinding fluid for a roll grinder as claimed in claim 6, further comprising a waste oil recovery and purification system, wherein the waste oil recovery and purification system comprises a transit oil tank communicated with the oil-water separation tank, an oil purifier communicated with the transit oil tank, and a liquid level meter fixedly installed in the transit oil tank;

an oil outlet of the transfer oil tank is communicated with an oil purifier, an oil outlet of the oil purifier is communicated with a lubricating oil system of the grinding machine body, and a water outlet of the oil purifier is communicated with the filtering assembly;

when the liquid level meter monitors that the volume of the waste oil in the transfer oil tank reaches a preset value, the oil purifier extracts the waste oil from the transfer oil tank for oil purification treatment, and conveys the purified lubricating oil to the lubricating oil system and the grinding fluid to the filtering assembly.

8. The centralized processing system of grinding fluid for a roll grinder according to claim 1, wherein the filter assembly further comprises at least one limiting roller fixedly installed between the driving roller and the driven roller, the pressure sensor is electrically connected with the driving roller, the limiting roller is in abutting fit with the lower surface of the filter medium, the driving roller, the driven roller and the limiting roller are distributed in a U shape, and the filter medium is in an arc shape above the vacuum chamber under the influence of the gravity of the grinding fluid and impurities and the negative pressure of the vacuum chamber.

9. The centralized processing system of grinding fluid for a roll grinder as claimed in claim 1, further comprising a magnetic roll filter fixedly installed between the water return tank of the grinder body and the filter assembly, wherein one end of the magnetic roll filter is communicated with the water return tank of the grinder body, and the other end of the magnetic roll filter is communicated with the filter assembly, and the magnetic roll filter sucks magnetic impurities in the grinding fluid and then discharges the grinding fluid.

10. The grinding fluid recovery method of the centralized processing system for grinding fluid for a roll grinder according to claim 8, comprising: s1, when the grinding machine body works, the water storage tank provides grinding fluid for a grinding area of the grinding machine body, the water return tank conveys the grinding fluid and impurities into the oil-water separation system, the oil-water separation system conveys lubricating oil in the grinding fluid into a transfer oil tank of the waste oil recovery and purification system, the oil-water separation system conveys the separated grinding fluid and impurities into the filtering component, the filtering component conveys the impurities into the waste residue moisture removal system, and the filtering component conveys the filtered grinding fluid into the water storage tank;

s2, a liquid level meter in the transfer oil tank monitors the volume of waste oil in the transfer oil tank in real time, when the liquid level meter monitors that the volume of the waste oil in the transfer oil tank reaches a preset value, an oil purifier extracts the waste oil from the transfer oil tank for oil purification treatment, conveys purified lubricating oil to a lubricating oil system, conveys grinding fluid which is purified and separated to a filtering component, and after the oil-water separation tank is used for a preset time, a washing water pump extracts the grinding fluid from a water storage tank to clean the oil-water separation tank and discharges cleaned dirty fluid to a filter fluid pool of the filtering component, wherein the oil-water separation tank performs oil-water separation while the oil-water separation tank is cleaned;

s3, when impurities in an upper layer slag box of the waste residue dehumidifying system reach a preset amount, starting a diaphragm pump to form a negative pressure cavity in the lower layer slag box, sucking grinding fluid in the impurities into the lower layer slag box by negative pressure and discharging the grinding fluid into a water storage tank by the diaphragm pump, and when the impurities in the upper layer slag box after being dehumidified exceed a preset value, separating the upper layer slag box from the lower layer slag box and replacing the upper layer slag box with a new one;

s4, when the grinding machine body works, the water tank flushing ball valve is in a closed state, and the sewage pump pumps grinding fluid out of the water storage tank to continuously flush the water return tank; the grinding machine body stops working after working for a preset time, the water tank flushing ball valve is in an open state, the sewage pump discharges the grinding fluid in the water tank out of the water tank, and simultaneously the pumped grinding fluid is utilized to flush impurities deposited at the bottom of the tank and then the grinding fluid and the impurities are discharged out of the water tank;

s5, when the grinder works, the concentration on-line monitor monitors the concentration and the liquid level of the grinding fluid in the water storage tank in real time, and when the concentration and the liquid level of the grinding fluid in the water storage tank reach the preset range, the concentration on-line monitor controls the stock solution tank and the purified water tank to supplement the grinding fluid stock solution and the clean water with preset amount into the water storage tank;

and S6, when the grinding fluid is used for a preset time, the oxygen increasing system supplies oxygen to the water storage tank.

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