CN211339415U

CN211339415U - Cutting fluid recovery and purification treatment device

Info

Publication number: CN211339415U
Application number: CN201922259878.8U
Authority: CN
Inventors: 顾斌; 杨莉
Original assignee: Zhenjiang Hanhong New Material Technology Co ltd
Current assignee: Zhenjiang Hanhong New Material Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-25
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a cutting fluid recovery purification unit, including the clarification tank, the clarification tank links to each other with centrifuge, centrifuge links to each other with solid collecting box, oil slick collecting box and stirred tank respectively, stirred tank links to each other with the charging box, adds the material through the charging box in to stirred tank, stirred tank links to each other with the cutting fluid case. The centrifugal filtration system is adopted, the number of parts is small, no material consumption is caused, the operation cost is low, the maintenance is convenient, and the concentration of the water-soluble cutting fluid is unchanged after the water-soluble cutting fluid is separated. The investment in the early stage is less, the operation and maintenance cost is low, and the consumption of consumables is minimum. Tests show that the oil removal efficiency of the separator of the skiving liquid recovery and purification treatment device is 95%, the floating oil content is almost zero, the degerming rate is 90%, the antirust performance is improved, and solid particles in liquid are effectively separated.

Description

Cutting fluid recovery and purification treatment device

Technical Field

The utility model relates to a cutting fluid recovery purification unit.

Background

In the metal cutting process, because of different processing modes and processing materials, the cutting fluid is required to be selected to remove impurities and heat generated in the metal cutting process, so that the surface smoothness and the processing precision of the metal cutting process are ensured. In the using process of the cutting fluid, along with the prolonging of the using time, the cutting fluid is easy to smell and deteriorate and needs to be replaced regularly, particularly in summer, the replacement is more frequent, and the discharged waste liquid not only causes pollution to the surrounding environment, but also causes the waste of useful components in the cutting fluid.

For factories, a main treatment method of the metal cutting fluid is to enter a sewage treatment station, and the metal cutting fluid contains various pollutants and can be discharged after being treated and meeting the locally specified wastewater treatment standard. At present, the following schemes are provided for the recovery and purification treatment of cutting fluid:

the first, adopt negative pressure paper tape filtration system, mainly to the cutting fluid filtration system of grinding machine development, the technology is ripe, the operation is stable, and the filter effect is good, and the shortcoming is: large occupied area, relatively complex maintenance and consumable consumption: and (5) filter paper.

Secondly, the membrane filtration system is adopted, the effect is best, the separation is also most thorough, and the defects are that: high early investment and high operation and maintenance cost.

In conclusion, the recycling of metal cutting fluid in the machining industry is an old and difficult problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a purification unit is retrieved to cutting fluid, the investment is less in earlier stage, and operation and maintenance cost are also low to the consumptive material consumption is minimum.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

purification unit is retrieved to cutting fluid, including the clarification tank, the clarification tank links to each other with centrifuge, centrifuge links to each other with solid collecting box, oil slick collecting box and stirred tank respectively, stirred tank links to each other with the charging box, adds the material in to stirred tank through the charging box, stirred tank links to each other with the cutting fluid case.

Preferably, the clarifying tank draws the emulsion filtered by the cutting fluid through an infusion pump, and a pre-filter and a check valve are further arranged between the infusion pump and the emulsion filtered by the cutting fluid.

Preferably, a primary filter and a secondary filter are sequentially arranged between the clarifying tank and the centrifuge, and the centrifuge is a disc centrifuge.

Preferably, the disc centrifuge is connected with the pressure stabilizing water tank through a pressure stabilizing water pump, and a diaphragm pump is arranged between the middle-effect filter and the disc centrifuge.

Preferably, the stirred tank is provided with a concentration detection assembly for measuring the concentration, and the feed box at least comprises the following feed box or any combination thereof:

a defoamer bin, a cutting stock solution bin, a water tank or an ozone generator;

when the charging box included cutting stoste case and water tank, stirred tank passed through the PID regulator and started cutting stoste respectively and add pump and water and add the pump, adjusted the cutting fluid to the settlement concentration.

Preferably, the stirring kettle is connected with the cutting fluid box through a fluid outlet pump and a first valve, and the fluid outlet pump is further connected with a fluid pump through a second valve.

Preferably, when the clarifying tank reaches a high liquid level, the liquid pump stops working; when the floating oil collecting box reaches a high liquid level S4, the centrifuge stops working and gives an alarm; when the pressure stabilizing water tank is at a low liquid level S5, alarming and stopping running the centrifuge; when the stirring kettle is at the low liquid level S8, the liquid outlet pump stops conveying.

Preferably, the clarifying tank extracts the emulsion filtered by the cutting fluid through at least two pipelines respectively; the stirring kettle is respectively connected with the cutting fluid box through at least two pipelines; the liquid outlet pump and the liquid pump are respectively connected through at least two pipelines; the clarification tank is provided with a first blowdown valve, and the stirred tank is provided with a second blowdown valve.

Correspondingly, the cutting fluid recovery and purification treatment method comprises the following steps:

step 1, pumping emulsion filtered by cutting fluid into a clarifying tank through at least 1 liquid pump;

step 2, when the liquid level of the clarifying tank is higher than the set liquid level, starting the diaphragm pump, filtering the cutting fluid to enter a disc centrifuge, separating, then, introducing floating oil in the cutting fluid to a floating oil collecting box, compressing the solid in the cutting fluid, and then periodically discharging the solid in the solid collecting box;

step 3, enabling the centrifugally separated clean cutting fluid to enter a stirring kettle, starting the stirring kettle to stir, quantitatively adding a defoaming agent through a defoaming agent adding pump in the stirring process, generating ozone through an ozone generator, and introducing the ozone into the stirring kettle to perform sterilization treatment;

step 4, measuring the concentration of the cutting fluid, respectively starting a cutting stock solution adding pump and a water adding pump through PID (proportion integration differentiation) adjustment, and adjusting the concentration of the cutting fluid to a set concentration;

and 5, after the cutting fluid is adjusted in the stirring kettle, respectively conveying the cutting fluid into the cutting fluid box through at least 1 liquid outlet pump.

Preferably, when the clarifying tank reaches a high liquid level, the liquid pump stops working, otherwise, the liquid pump starts working; when the floating oil collecting box reaches a high liquid level S4, the centrifuge stops working and gives an alarm; when the pressure stabilizing water tank is at a low liquid level S5, alarming and stopping running the centrifugal separator; when the stirring kettle is at a low liquid level S8, the liquid outlet pump stops conveying; the liquid outlet pump is connected with the liquid pump through a valve.

The utility model has the advantages that:

firstly, a centrifugal filtering system is adopted, the components are few, no consumable material is consumed, the operation cost is low, the maintenance is convenient, and the concentration of the water-soluble cutting fluid is unchanged after the water-soluble cutting fluid is separated (the demulsification of the cutting fluid cannot be caused by the rpm of a separator 6626). The investment in the early stage is less, the operation and maintenance cost is low, and the consumption of consumables is minimum.

Second, through tests, the oil removal efficiency of the separator of the paring liquid recovery and purification treatment device is 95%, the floating oil content is almost zero, the degerming rate is 90%, the antirust performance is improved, and solid particles in liquid are effectively separated.

Thirdly, the whole system is set to be a circulating loop, the service life of the emulsion is prolonged by 5-10 times, the consumption of the filter material is reduced by more than 90%, and waste liquid treatment including waste emulsion, cleaning liquid and the like is reduced. The consumption of the emulsion and the cleaning solution is reduced.

Fourthly, the recycling effect is good, the working environment is improved, the taste is reduced, and the defective rate and the rejection rate are reduced. The method has the advantages of reducing the cost and time of later maintenance, improving the processing quality, reducing the loss of processing cutters, and being particularly suitable for the recovery and purification treatment of the cutting fluid of the threading machine.

Drawings

FIG. 1 is a schematic structural view of a cutting fluid recovery and purification device of the present invention;

FIG. 2 is a plan view of the cutting fluid recovery and purification device of the present invention;

FIG. 3 is a front view of the cutting fluid recovery and purification device of the present invention;

FIG. 4 is a left side view of the cutting fluid recovery and purification device of the present invention;

FIG. 5 is a schematic view of the working principle of the cutting fluid recovery and purification device of the present invention;

the reference numerals of the drawings have the following meanings:

1: a clarifying tank; 2: a pressure stabilizing water tank; 3: a floating oil collecting box; 4: a primary filter; 5: a liquid inlet pipeline; 6: a disk centrifuge; 7: a solid collection box; 8: stirring the mixture in a kettle; 9: a concentration detection component; 10: a liquid outlet pipeline; 11: a liquid outlet pump; 12: a feed line; 13: a feed box; 14: an electromagnetic metering pump; 15: a pressure stabilizing water pump; 16: a liquid pump; 17: a medium-efficiency filter; 18: a first waste valve; 19: a second blowoff valve; 20: a disc centrifuge motor; 21: a diaphragm pump; 22: a water addition pump; 23: a cutting fluid tank; 24: a defoaming agent addition pump; 25: a cutting stock solution addition pump.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.

As shown in fig. 1 to 5, the cutting fluid recovery and purification treatment apparatus includes a clarifying tank 1, the clarifying tank 1 draws the emulsion filtered from the cutting fluid by an infusion pump 16, and a pre-filter and a check valve are further disposed between the infusion pump 16 and the emulsion filtered from the cutting fluid. The front filter can adopt a 200-mesh stainless steel net as a filter material, a filter cartridge is designed, the filter cartridge can be replaced quickly, a pressure sensor is arranged in a pressure gauge, and the filter cartridge is prompted to be replaced according to pressure difference. The clarifying tank 1 is connected with a centrifugal machine, and preferably, a primary filter 4 and a middle filter 17 are sequentially arranged between the clarifying tank 1 and the centrifugal machine. The primary filter 4 and the secondary filter 17 may have the same structure as the former filter, and the filter core materials are 400 mesh stainless steel net and 20u non-woven fabric, respectively.

The centrifuge may employ a disk centrifuge 6, and the disk centrifuge 6 (i.e., a disk centrifuge) is one of decanter centrifuges for separating miscellaneous oils and metal particles in an emulsion that is difficult to separate. The principle that the cooling liquid contains the miscellaneous oil, the homogeneous emulsion and the solid-phase metal particles which have different densities and are not mutually soluble is utilized to obtain different settling velocities in a centrifugal force field, so that the purposes of separating the miscellaneous oil, layering and settling the solid particles in the liquid are achieved.

Preferably, a high-speed disk centrifuge is used, operating at 6626rpm, which corresponds to the centrifugal force of 12293G. The different specific gravities of the miscellaneous oil, the emulsion and the metal particles entering the rotary drum generate a centrifugal force which is thousands to ten thousand times larger than the gravity of natural sedimentation in the rotary drum rotating at a high speed, and the separation and sedimentation processes are continuously and rapidly carried out. The great centrifugal force in the drum makes it possible to obtain, within a few seconds, a separation effect which can be obtained in the settling tank only by the action of natural gravity for a few hours. The main parts of the rotary drum and the like can be made of corrosion-resistant 316L stainless steel, and other parts in contact with materials can be made of corrosion-resistant 316L stainless steel, so that the durability and the long-term service life of equipment are ensured.

The centrifuge is respectively connected with a solid collecting box 7, a floating oil collecting box 3 and a stirring kettle 8, the floating oil collecting box 3 is used for storing floating oil in the separated cutting fluid, and the solid collecting box 7 is used for storing solids (scrap iron and the like) in the cutting fluid. The stirred tank can adopt stainless steel material, and the design of low-speed paddle, the clearance starts, can guarantee the cauldron in the temperature normal range, and clarification tank appearance material can be the same with stirred tank, only a few agitating unit.

Stirred tank 8 links to each other with charging box 13, through charging box 13 and charging pipeline 12 to the interior material that adds of stirred tank 8, each charging box 13 of preferred is provided with electromagnetic metering pump 14, charging box 13 includes following kind of feed box or its arbitrary combination at least: the defoaming agent workbin, cutting stoste case, water tank or ozone generator, wherein, the defoaming agent workbin adds pump 24 and is connected with stirred tank 8 through the defoaming agent, and cutting stoste case adds pump 25 and is connected with stirred tank 8 through the cutting stoste, and the water tank is connected with stirred tank 8 through water adds pump 22. Preferably, when the feed box 13 includes a cutting stock solution box and a water tank, the stirring kettle 8 is further provided with a concentration detection assembly 9 for measuring the concentration, for example, a concentration detector, and the stirring kettle 8 respectively starts the cutting stock solution adding pump 25 and the water adding pump 22 through a PID regulator to adjust the cutting solution to a set concentration.

Stirred tank 8 links to each other with cutting fluid case 23, as shown in fig. 5, stirred tank 8 links to each other with cutting fluid case 23 through going out liquid pump 11 and first valve, it still links to each other with drawing liquid pump 16 through the second valve to go out liquid pump 11, constitutes a circulation circuit, realizes the recovery of cutting fluid and purifies and recycle, and stirred tank 8 discharges out the cutting fluid through liquid outlet pipe 10.

Preferably, when the clarification tank 1 reaches a high liquid level, the liquid pump 16 stops working; when the floating oil collecting box 3 reaches the high liquid level S4, the centrifuge stops working and gives an alarm; when the pressure stabilizing water tank 2 is at a low liquid level S5, alarming and stopping running the centrifuge; when the stirring kettle 8 is at the low liquid level S8, the liquid outlet pump 11 stops conveying.

In order to ensure the stable operation of the centrifugal separator, the disc type centrifugal separator 6 is connected with the pressure stabilizing water tank 2 through the pressure stabilizing water pump 15, and when the pressure stabilizing water tank is at a low liquid level S5, an alarm is given and the centrifugal separator stops operating. A diaphragm pump 21 is arranged between the intermediate filter 17 and the disk centrifuge 6.

As shown in fig. 5, a plurality of pipelines may be arranged according to an actual production environment, that is, the clarifying tank 1 extracts the emulsion filtered by the cutting fluid through at least two pipelines respectively; the stirring kettle 8 is respectively connected with the cutting fluid tank 23 through at least two pipelines; the liquid outlet pump 11 and the liquid pump 16 are respectively connected through at least two pipelines; the clarifying tank 1 is provided with a first blowdown valve 18, and the stirring kettle 8 is provided with a second blowdown valve 19.

Specifically, the cutting fluid recovery and purification treatment method comprises the following steps:

step 1, pumping the emulsion filtered by the cutting fluid into a clarifying tank 1 through at least 1 liquid pump 16;

step 2, when the liquid level of the clarifying tank 1 is higher than the set liquid level, starting a diaphragm pump 21, filtering the cutting fluid to enter a disc centrifuge 6, separating, then, allowing the floating oil in the cutting fluid to enter a floating oil collecting box 3, compressing the solid in the cutting fluid, and then periodically discharging the solid into a solid collecting box 7;

step 3, enabling the centrifugally separated clean cutting fluid to enter a stirring kettle 8, starting the stirring kettle 8 to stir, quantitatively adding a defoaming agent through a defoaming agent adding pump 24 in the stirring process, generating ozone through an ozone generator, and introducing the ozone into the stirring kettle 8 to perform sterilization treatment;

step 4, measuring the concentration of the cutting fluid, respectively starting a cutting stock solution adding pump 25 and a water adding pump 22 through PID adjustment, and adjusting the concentration of the cutting fluid to a set concentration;

and step 5, after the cutting fluid is adjusted in the stirring kettle 8, respectively conveying the cutting fluid into the cutting fluid box 23 through at least 1 liquid outlet pump 11.

Preferably, when the clarifying tank 1 reaches a high liquid level, the liquid pump 16 stops working, otherwise, the liquid pump 16 starts working; when the floating oil collecting box 3 reaches the high liquid level S4, the centrifuge stops working and gives an alarm; when the pressure stabilizing water tank 2 is at the low liquid level S5, alarming and stopping running the centrifugal separator; when the stirring kettle 8 is at the low liquid level S8, the liquid outlet pump 11 stops conveying; the liquid outlet pump 11 is connected with a liquid pump 16 through a valve.

The device is particularly suitable for the recovery and purification treatment of the cutting fluid of the threading machine, and the following description takes the field working condition of the threading machine of an enterprise as an example, and by knowing the field working condition of the threading machine of the enterprise, small particles generated after cutting are fewer (relative to a grinding machine), so that a centrifugal filtration system is adopted, the early investment is less, the operation and maintenance cost is low, and the consumption of consumables is minimum.

The emulsion filtered by the four threading machines is respectively pumped into a clarifying tank through 4 liquid pumps and a liquid inlet pipeline 5, the emulsion stays in the clarifying tank, when the liquid level reaches a high liquid level, S1 gives a signal, the liquid pumps stop working, and when the liquid level in the clarifying tank is at a medium liquid level S2 and a low liquid level S3, the liquid pumps start working. Wherein, a pre-filter (200 meshes) and a check valve are arranged in front of the liquid-extracting pump.

When the liquid level of the clarifying tank is at a high liquid level, the diaphragm pump is started, the cutting fluid enters the disc type centrifugal separator after passing through the primary-effect filter and the intermediate-effect filter, after separation, the floating oil in the cutting fluid enters the floating oil collecting box, and when the floating oil collecting box reaches the high liquid level S4, the centrifugal separator stops working and gives an alarm; the solid (scrap iron, etc.) in the cutting fluid is compressed and then automatically discharged into a solid collecting box at regular intervals; in order to make the centrifugal separator operate stably, a pressure stabilizing pump and a pressure stabilizing water tank are arranged, and when the pressure stabilizing water tank is at a low liquid level S5, an alarm is given and the centrifugal separator stops operating.

The clean cutting fluid after centrifugal separation enters a stirring kettle, the stirring kettle is started, stirring is carried out at a low speed, and defoaming agent is quantitatively added through a defoaming agent adding pump to eliminate foam in the cutting fluid; ozone is generated by an ozone generator and is introduced into the stirring kettle for sterilization treatment.

And starting a cutting fluid concentration measuring instrument, measuring the concentration of the cutting fluid, respectively starting a cutting stock solution adding pump and a water adding pump through PID (proportion integration differentiation) regulation, and regulating the cutting fluid to correct concentration. After the cutting fluid is adjusted in the stirred tank, the cutting fluid is respectively conveyed into the cutting fluid boxes of the 4 turning wire machines through the 4 liquid outlet pumps, and when the stirred tank is at a low liquid level S8, the liquid outlet pumps stop conveying. The liquid outlet pump is respectively connected with the cutting fluid box and the liquid pump through two valves, so that the cutting fluid can be recycled, and an automatic recycling loop is formed.

Preferably, a high-speed disk centrifuge is used, operating at 6626rpm, which corresponds to the centrifugal force of 12293G. The high-speed disk centrifuge is driven by a disk centrifuge motor 20 to realize high-speed operation, the disk centrifuge motor is a Siemens motor, and the motor drives a hydraulic coupler to drive a rotary drum, so that dust produced during the operation of the equipment is prevented from polluting materials. The centrifuge occupies small space and is simple to install and debug; the whole machine is operated in a fully-sealed way, is safe and sanitary, and has good use environment. The equipment can be controlled by a PLC (programmable logic controller), humanized program control can be realized according to materials and production requirements, dual functions of automatic slag discharge and manual slag discharge are realized, and the operation is very convenient and flexible.

The field use effect is measured as follows:

1) the device can effectively separate solid particles in the liquid, and the concentration of the water-soluble cutting fluid is unchanged after the water-soluble cutting fluid is separated (the demulsification of the cutting fluid cannot be caused by the rpm of the separator 6626);

2) the floating oil content is almost zero, and the oil removal efficiency of the separator is 95%;

3) the degerming rate is 90 percent; the antirust performance is improved;

4) prolonging the service life of the emulsion by 5-10 times;

5) the consumption of the emulsion and the cleaning solution is effectively reduced;

6) the waste liquid treatment including waste emulsion, cleaning liquid and the like is reduced;

7) the consumption of the filter material is reduced by more than 90 percent;

8) improving working environment and reducing taste.

9) The loss of the machining tool is effectively reduced, the defective rate and the rejection rate are reduced, the operation time of a machine tool is prolonged, the maintenance time of the machine tool is shortened, and the machining quality is improved.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings are utilized, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. Purification unit is retrieved to cutting fluid, including clarification tank (1), its characterized in that, clarification tank (1) links to each other with centrifuge, centrifuge links to each other with solid collecting box (7), oil slick collecting box (3) and stirred tank (8) respectively, stirred tank (8) link to each other with charging box (13), through charging box (13) to stirred tank (8) interior interpolation material, stirred tank (8) link to each other with cutting fluid case (23).

2. The cutting fluid recovery and purification treatment device according to claim 1, wherein the clarification tank (1) is used for pumping the emulsion filtered from the cutting fluid by a fluid pump (16), and a pre-filter and a check valve are further arranged between the fluid pump (16) and the emulsion filtered from the cutting fluid.

3. The cutting fluid recovery and purification treatment device according to claim 1, wherein a primary filter (4) and a middle filter (17) are sequentially arranged between the clarifying tank (1) and the centrifuge, and the centrifuge is a disk centrifuge (6).

4. The cutting fluid recovery and purification treatment device according to claim 3, wherein the disk centrifuge (6) is connected with the pressure-stabilizing water tank (2) through a pressure-stabilizing water pump (15), and a diaphragm pump (21) is arranged between the medium-efficiency filter (17) and the disk centrifuge (6).

5. The cutting fluid recovery and purification treatment device according to claim 1, wherein the stirring tank (8) is provided with a concentration detection assembly (9) for measuring concentration, and the feed box (13) comprises at least one of the following feed boxes or any combination thereof:

when feeder box (13) are including cutting stoste case and water tank, stirred tank (8) are passed through the PID regulator and are started cutting stoste respectively and add pump (25) and water and add pump (22), adjust the cutting fluid to the set concentration.

6. The cutting fluid recovery and purification treatment device according to claim 1, wherein the stirring tank (8) is connected with the cutting fluid tank (23) through a fluid outlet pump (11) and a first valve, and the fluid outlet pump (11) is further connected with the fluid pump (16) through a second valve.