CN212151802U

CN212151802U - Pretreatment equipment for grinding oil stains and SS in wastewater

Info

Publication number: CN212151802U
Application number: CN201922471184.0U
Authority: CN
Inventors: 解付兵; 刘宜德; 曹莹; 欧阳书径; 陈利娟; 翟海军; 陈人可; 熊金云; 曾宪军
Original assignee: Shenzhen Yuepeng Environmental Protection Technology Co Ltd; Hunan Jingyi Xiangtai Environmental Protection High Tech Development Co Ltd
Current assignee: Shenzhen Yuepeng Environmental Protection Technology Co Ltd; Hunan Jingyi Xiangtai Environmental Protection High Tech Development Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-12-15
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a pre treatment facilities of greasy dirt and SS in grinding waste water, includes teeter chamber, dissolves gas chamber, cyclone and separation chamber, is provided with the grinding waste water entry on the teeter chamber, and teeter chamber, the gas chamber of dissolving all communicate with cyclone, and the cyclone bottom sets up the SS discharge port, and the cyclone top and separation chamber intercommunication, separation chamber upper portion set up the oil phase export, and the separation chamber lower part sets up the aqueous phase export. The utility model discloses compact structure, area is little, can accomplish breakdown of emulsion, SS separation and oil-water separation's process simultaneously, and the SS clearance to grinding waste water is greater than 90%, and the greasy dirt clearance reaches 70%, and the effect is splendid, and the running cost is low.

Description

Pretreatment equipment for grinding oil stains and SS in wastewater

Technical Field

The utility model relates to a waste water treatment technical field, concretely relates to preprocessing equipment of greasy dirt and SS in grinding waste water.

Background

In the process of grinding the mobile phone glass, a certain proportion of organic matters are required to be added into the grinding fluid, so that the related performance of the grinding fluid is enhanced. After the grinding fluid is scrapped, the grinding fluid is often mixed with the cleaning of workpieces and equipment and discharged to form waste water containing oil stains and SS simultaneously, wherein the SS is a general term for suspended matters in water environment research and treatment. SS in the waste water is mainly ground waste powder, the average particle size of the SS is only a few microns, about 10 percent of particles have the particle size of less than 200 nanometers, the small SS is difficult to settle, and particularly part of organic emulsified oil in the waste water is adhered to part of solid small particles, so that the overall density of the solid small particles is reduced, the settling speed is slower, the oil phase and the SS of the waste water are difficult to treat, the treatment cost is higher, and the subsequent processes are easily influenced.

In the traditional air floatation process, part of oil phase and solid phase are mutually wrapped, and the solid phase is adhered and taken out in the oil phase agglomeration floating process, so that the concentration and the quantity of organic oil phase pollutants are increased. The operation results in increased output of hazardous waste and increased enterprise burden. In the traditional precipitation process, the settling velocity of larger solid-phase particles which are adhered to the part in the water phase by the oil phase is lower than that of normal SS, so that the SS of the effluent of the settling tank exceeds the standard easily, meanwhile, SS below 200 nm in the grinding wastewater is difficult to settle, and the particles can move due to weak disturbance of water flow, so that the settling velocity is slower, therefore, the SS settling efficiency of the wastewater in the traditional precipitation process is low, and the SS of the effluent is higher, so that the burden of the subsequent process is increased.

In the prior art, two common air flotation tanks and two horizontal flow sedimentation tanks are arranged in parallel in the horizontal direction to treat grinding wastewater, and the air flotation tanks and the sedimentation tanks respectively carry out oil phase removal and SS separation, but because the separation efficiency of the traditional equipment is low, the amount of organic waste is increased additionally and the effluent SS of the horizontal flow sedimentation tank exceeds the standard. Therefore, the utility model aims at developing a pretreatment equipment and method of greasy dirt and SS in grinding waste water with better processing grinding waste water, reduce organic waste's production volume, reduce the content of water SS, reduce the useless treatment cost of danger and follow-up waste water treatment cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a preprocessing equipment of greasy dirt and SS in the grinding waste water to solve the problem in the above-mentioned background art.

The utility model provides a technical problem adopt following technical scheme to realize:

the utility model provides a pre treatment facilities of greasy dirt and SS in grinding waste water, includes teeter chamber, dissolves gas chamber, cyclone and separation chamber, is provided with the grinding waste water entry on the teeter chamber, and teeter chamber, the gas chamber of dissolving all communicate with cyclone, and the cyclone bottom sets up the SS discharge port, and the cyclone top and separation chamber intercommunication, separation chamber upper portion set up the oil phase export, and the separation chamber lower part sets up the aqueous phase export.

Furthermore, the stirring chamber and the separation chamber are arranged in parallel, the gas dissolving chamber and the cyclone separator are arranged in parallel, the stirring chamber is arranged at the top of the gas dissolving chamber, and the separation chamber is arranged at the top of the cyclone separator.

Furthermore, a stirring device is arranged in the stirring chamber, and the grinding wastewater enters the upper part of the cyclone separator along the tangential direction under the action of the stirring device.

Furthermore, the air dissolving chamber is provided with a compressed air inlet and a high-pressure water inlet, the compressed air inlet extends into the air dissolving chamber through an air pipe, the tail end of the air pipe is provided with a microporous aeration disc, and the top of the air dissolving chamber is communicated with the cyclone separator through a gas-liquid conveying pipe.

Furthermore, the cyclone separator is communicated with the separation chamber through an overflow pipe, an opening at the tail end of the gas-liquid conveying pipe faces the bottom of the overflow pipe, and high-pressure gas and liquid output by the gas-liquid conveying pipe are sprayed into the separation region through the overflow pipe and drive the oil phase to rise.

Has the advantages that: 1) the utility model is an integrated device, has compact structure and small occupied area, can simultaneously complete the processes of emulsion breaking, SS separation and oil-water separation, and has good effect of removing SS and oil stains of grinding wastewater;

2) the stirring device in the stirring chamber is simple and energy-saving, and can demulsify the oil stains in an emulsified state and push the oil stains into the cyclone separator at a high speed;

3) the grinding wastewater rotates at a high speed in the cyclone separator to form a centrifugal force field, so that the separation of the SS and the oil phase is realized, and in the separation process, the flow velocity entering the cyclone separator can be adjusted by adjusting the stirring speed of the stirring device in the stirring chamber, so that the centrifugal force generated by the fluid entering the cyclone separator can be adjusted, and the adjustment can be performed according to the specific conditions of the SS particle size in the wastewater, the emulsification state of the organic oil phase and the like;

4) the centrifugal force generated in the cyclone separator is more than 50 times larger than the gravity, the separation efficiency of the SS and the oil phase is far higher than that of the traditional horizontal sedimentation tank, and meanwhile, the SS is continuously discharged from the lower end of the cyclone separator and is easy to collect;

5) the mixed phase of air and water with pressure drives the oil phase to float upwards and enter the separation chamber, grinding wastewater flows in from the upper part of the cyclone separator, the air dissolved in high-pressure water is separated out along with the reduction of the pressure in the floating process of the mixed phase to form fine bubbles, oil drops with small granularity can be captured, the oil content in sewage is effectively reduced, the mixed phase and the water phase are separated by natural overflow at the top end of the separation chamber, SS is continuously discharged from the lower end of the cyclone separator without increasing equipment monitoring, and the operation cost is low.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Wherein: 1. a stirring chamber; 2. a gas dissolving chamber; 3. a cyclone separator; 4. a separation chamber; 5. a grinding wastewater inlet; 6. a stirring device; 7. stirring blades; 8. a pressure gauge; 9. a high-pressure water inlet; 10. a compressed air inlet; 11. an air tube; 12. a microporous aeration disc; 13. a gas-liquid delivery pipe; 14. an SS outlet; 15. an overflow pipe; 16. a water phase outlet; 17. an oil phase outlet; 18. oil baffle plate.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.

The pretreatment equipment for oil stains and SS in grinding wastewater shown in figure 1 comprises a stirring chamber 1, a gas dissolving chamber 2, a cyclone separator 3 and a separation chamber 4, wherein the stirring chamber 1 and the separation chamber 4 are arranged in parallel, the gas dissolving chamber 2 and the cyclone separator 3 are arranged in parallel, the stirring chamber 1 is arranged at the top of the gas dissolving chamber 2, the separation chamber 4 is arranged at the top of the cyclone separator 3, a grinding wastewater inlet 5 is formed in the stirring chamber 1, the stirring chamber 1 and the gas dissolving chamber 2 are both communicated with the cyclone separator 3, an SS discharge port 14 is formed in the bottom of the cyclone separator 3, the top of the cyclone separator 3 is communicated with the separation chamber 4, an oil phase outlet 17 is formed in the upper part of the separation chamber 4, and a water phase outlet 16 is formed in the lower part.

A stirring device 6 is arranged in a stirring chamber 1, a stirring blade 7 arranged at the bottom of the stirring device 6 is right opposite to the communication position of the stirring chamber 1 and the cyclone separator 3, under the action of the stirring device 6, part of oil phase in an emulsified state is firstly demulsified and then enters the upper part of the cyclone separator 3 along the tangential direction with acceleration, the oil phase flows in the cyclone separator 3 in a rotating manner, SS moves towards the wall of the cyclone separator 3 under the action of centrifugal force and is separated from the oil phase, and a solid material layer close to the wall of the cyclone separator moves downwards along the wall under the action of pushing and extruding action of upper slurry and gravity, and is discharged and collected from an SS discharge port 14.

The air dissolving chamber 2 is provided with a compressed air inlet 10 and a high-pressure water inlet 9, the pressure in the air dissolving chamber 2 is monitored by a pressure gauge 8, the compressed air inlet 10 extends into the air dissolving chamber 2 through an air pipe 11, the tail end of the air pipe 11 is provided with a micropore aeration disc 12, compressed air enters the air dissolving chamber 2 and generates a large amount of fine bubbles through the micropore aeration disc 12, the fine bubbles are fully dissolved in water and are conveyed into the cyclone separator 3 through an air-liquid conveying pipe 13 arranged at the top of the air dissolving chamber 2, the cyclone separator 3 and the separation chamber 4 are communicated through an overflow pipe 15, the opening at the tail end of the air-liquid conveying pipe 13 is arranged towards the bottom of the overflow pipe 15, high-pressure air and liquid output by the air-liquid conveying pipe 13 are sprayed into the separation zone 4 through the overflow pipe 15 and drive an oil phase to ascend, and the air dissolved in, can catch the oil droplet of the very little micro emulsion state of granularity, the oil phase of micro emulsion state merges the gathering at the in-process that rises and grows up, it floats on the bubble to adhere, form stable oil reservoir at the surface of water, and discharge from oil phase export 17, the aqueous phase of having got rid of most oil phase and SS discharges from aqueous phase export 16, get into next processing procedure, because aqueous phase export 16 sets up in separation chamber 4 lower part, in order to prevent that the not abundant oil phase mistake that is adsorbed by the bubble of separation chamber 4 lower part from discharging through aqueous phase export 16, vertical oil baffle 18 has been set up in the embodiment, oil baffle 18 constitutes the drainage chamber with separation chamber 4 inner wall, drainage chamber open-top, and the open-top of drainage chamber is close to the well upper portion setting of separation chamber 4.

Application example: the wastewater of a certain mobile phone screen processing plant of the company contains a large amount of fine grinding powder and a small amount of oil stain, and after the equipment is adopted, the wastewater before entering the equipment contains 200mg/l of oil and 1500mg/l of SS. After the pretreatment of the equipment, the subsequent cost is reduced, and particularly the service life of a membrane system for reclaimed water reuse is prolonged.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pre treatment facilities of greasy dirt and SS in grinding waste water, its characterized in that, includes teeter chamber, dissolves air chamber, cyclone and separation chamber, is provided with the grinding waste water entry on the teeter chamber, and teeter chamber, dissolved air chamber all communicate with cyclone, and the cyclone bottom sets up the SS discharge port, and cyclone top and separation chamber intercommunication, separation chamber upper portion set up the oil phase export, and the separation chamber lower part sets up the aqueous phase export.

2. The pretreatment equipment for grinding oil stain and SS in wastewater according to claim 1, wherein the stirring chamber is arranged in parallel with the separation chamber, the gas dissolving chamber is arranged in parallel with the cyclone separator, the stirring chamber is arranged at the top of the gas dissolving chamber, and the separation chamber is arranged at the top of the cyclone separator.

3. The pretreatment equipment for oil stain and SS in grinding wastewater according to claim 1, characterized in that a stirring device is arranged in the stirring chamber, and the grinding wastewater enters the upper part of the cyclone separator tangentially under the action of the stirring device.

4. The pretreatment apparatus for grinding oil and SS in wastewater according to claim 1, wherein the air dissolving chamber is provided with a compressed air inlet and a high pressure water inlet, the compressed air inlet extends into the air dissolving chamber through an air pipe, the end of the air pipe is provided with a microporous aeration disc, and the top of the air dissolving chamber is communicated with the cyclone separator through a gas-liquid delivery pipe.

5. The pretreatment apparatus for grinding oil and SS in wastewater according to claim 4, wherein said cyclone separator and said separation chamber are connected by an overflow pipe, the end opening of said gas/liquid delivery pipe is disposed toward the bottom of the overflow pipe, and the high-pressure gas/liquid output from the enterprise delivery pipe is sprayed into the interior of the separation zone by the overflow pipe and drives the oil phase to rise.