阅读说明：本技术 高效油水分离的废液的处理方法 (Treatment method of waste liquid of high-efficiency oil-water separation ) 是由 唐谊平 陈强 张健力 金杨福 徐登波 沈华 郑忠斌 于 2021-08-10 设计创作，主要内容包括：本发明提出了一种高效油水分离的废液的处理方法,废液在生产过程中产出后进行导流并通过管道输送至汇集容器中,废液在汇集容器中缓流至静置,废液在静置状态下固体颗粒物下沉至底部,油性液体上浮为顶层,其余中间部分为水性溶液,将顶层油性液体单独导流排出并集中,将中层水性溶液导流到循环净化装置中,所述水性溶液中的含水比例≥85%、固体颗粒物质量比例≤5%、油性液体质量比例≤10%,水性溶液在循环净化装置中产生净水,其余部分进行循环过滤,最终的高浓度废液集中收集。本方案中通过采用前期静置以及配合循环净化的方式,提高废液的过滤效果。(The invention provides a method for treating waste liquid of high-efficiency oil-water separation, which comprises the steps of guiding the flow of the waste liquid after the waste liquid is produced in the production process, conveying the waste liquid into a collecting container through a pipeline, slowly flowing the waste liquid in the collecting container to stand, sinking solid particles to the bottom of the waste liquid in the standing state, floating the oily liquid to form a top layer, guiding and discharging the oily liquid in the top layer independently and concentrating the oily liquid in the middle layer, guiding the aqueous solution in the middle layer into a circulating purification device, wherein the water content of the aqueous solution is more than or equal to 85%, the mass proportion of the solid particles is less than or equal to 5%, the mass proportion of the oily liquid is less than or equal to 10%, purifying the aqueous solution in the circulating purification device to generate purified water, circularly filtering the rest of the aqueous solution, and finally collecting the high-concentration waste liquid in a centralized manner. Through the mode that adopts to stand in earlier stage and cooperate circulation to purify in this scheme, improve the filter effect of waste liquid.)

1. A method for treating waste liquid of high-efficiency oil-water separation is characterized by comprising the following steps: the method comprises the steps of guiding the waste liquid after the waste liquid is produced in the production process and conveying the waste liquid to a collecting container through a pipeline, slowly flowing the waste liquid in the collecting container to stand, allowing solid particles of the waste liquid to sink to the bottom in the standing state, allowing the oily liquid to float upwards to form a top layer, allowing the rest of the oily liquid to be aqueous solution, independently guiding and discharging the oily liquid on the top layer and concentrating, guiding the aqueous solution on a middle layer to a circulating purification device, wherein the water content of the aqueous solution is more than or equal to 85%, the mass proportion of the solid particles is less than or equal to 5%, the mass proportion of the oily liquid is less than or equal to 10%, allowing the aqueous solution to generate purified water in the circulating purification device, performing circulating filtration on the rest of the aqueous solution, and finally and intensively collecting the high-concentration waste liquid.

2. The method for treating a waste liquid from high efficiency oil-water separation according to claim 1, characterized in that: the circulation purification device comprises a tank body (1) and a membrane filtration device (2), wherein the tank body (1) is connected with an outflow pipe (3), the outflow pipe (3) is connected to the membrane filtration device (2), a liquid pressurization device is arranged on the outflow pipe (3), the liquid in the tank body (1) flows into the membrane filtration device (2) after being pressurized, the membrane filtration device (2) is provided with a solid filtration device (4) and a liquid permeation filtration device (5), waste liquid firstly passes through the fixed filtration device to separate solid particles and then enters the liquid permeation filtration device (5), oily liquid and dissolved inorganic salt are filtered in the liquid permeation filtration device (5), and water purification is generated.

3. The method for treating a waste liquid from high efficiency oil-water separation according to claim 2, characterized in that: the solid filtering device (4) and the liquid permeation filtering device (5) comprise a shell (6), a solid filtering core (7) is concentrically arranged in the shell (6) of the solid filtering device (4), a permeation filtering core (8) is concentrically arranged in the liquid permeation filtering device (5), the solid filtering core (7) and the permeation filtering core (8) are both formed into a cylindrical structure, the outer side of the cylindrical structure is raw liquid, the inner side of the cylindrical structure is filtering liquid, the two ends of the shell (6) are respectively provided with an inlet and an outlet, the inlet is hermetically communicated with the outer side, the outlet is hermetically communicated with the inner side, waste liquid enters the outer side contacting the solid filtering core (7) and the permeation filtering core (8) from the inlet and enters the inner side after being filtered, and then flows out through the outlet.

4. The method for treating a waste liquid from high efficiency oil-water separation according to claim 3, wherein: the solid structure of the solid filter core (7) is provided with filter holes, and the filter holes are uniformly distributed and formed on the solid filter core (7).

5. The method for treating a waste liquid from high efficiency oil-water separation according to claim 3, wherein: the infiltration filter element (8) adopts an oil-water separation membrane and a silicon carbide ceramic membrane, the oil-water separation membrane and the silicon carbide ceramic membrane are both formed into a cylindrical shape, the outer diameter of the silicon carbide ceramic membrane is smaller than the inner diameter of the oil-water separation membrane and are mutually sleeved, a gap is formed between the oil-water separation membrane and the silicon carbide ceramic membrane, and waste liquid sequentially passes through the oil-water separation membrane and the silicon carbide ceramic membrane.

6. The method for treating a waste liquid from high efficiency oil-water separation according to any one of claims 3 to 5, wherein: be provided with backward flow mouth (9) on casing (6), backward flow mouth (9) are by the outside of casing (6) to the inside intercommunication shaping of casing (6), and the part that can't pass through in solid filter equipment (4) and the liquid permeation filtration device (5) is flowed by backward flow mouth (9) to switch on in jar body (1) through the pipeline.

7. The method for treating a waste liquid from high efficiency oil-water separation according to claim 2, characterized in that: the bottom of the tank body (1) is provided with a discharge port, a valve is arranged on the discharge port, and the discharge port is connected to a concentrated waste liquid storage device through a liquid discharge pipeline.

8. The method for treating a waste liquid from high efficiency oil-water separation according to claim 7, wherein: the tank body (1) and the membrane filtering device (2) are connected with each other through pipes, and the circulating purification device comprises a tank body (1) and a membrane filtering device (2) which are both provided with more than two shells (6) and an internal filter element structure.

Technical Field

The invention relates to a high-efficiency recovery processing device for waste liquid in a production and processing process, in particular to a processing method for the waste liquid of high-efficiency oil-water separation.

Background

The metal working fluid is a functional fluid applied to a metal working process, waste materials of the working fluid generated after the metal working fluid is used are waste liquids, components in the waste liquids are complex, the metal working fluid is more in types, and the metal working fluid mainly plays roles in lubricating and cooling and has functions of rust prevention and cleaning and the like. General metal working fluids include cutting fluid, cutting oil, punching oil, quenching agent, high-temperature oil, extreme-pressure cutting fluid, grinding fluid, antirust oil, cleaning agent and the like, various types of working fluids are collected in a centralized manner, impurity components in the waste fluid are complex, the waste fluid mainly contains metal particles and other impurity particles, and inorganic salt impurities can be dissolved, the metal working fluids are usually prepared into emulsion for reducing oxidation corrosion in the metal working process, and water can be added for dilution in use, so that the post-treatment difficulty of the metal working waste fluid is high, if the waste fluid is treated, the waste fluid needs to be sent to a special treatment mechanism for treatment after being centralized, the storage and transportation costs are high, in addition, the additional treatment cost is high, the cost and pressure of enterprises are high, and in order to reduce the later maintenance cost of the enterprises, certain technical improvement is necessary, the waste liquid is discharged to a certain degree, the post-treatment cost is reduced, the environmental pollution is reduced, and the assistance is provided for the technical upgrading and development of enterprises.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a method for treating waste liquid of high-efficiency oil-water separation.

The technical scheme adopted by the invention for solving the problems is as follows: the method comprises the steps of guiding the waste liquid after the waste liquid is produced in the production process and conveying the waste liquid to a collecting container through a pipeline, slowly flowing the waste liquid in the collecting container to stand, allowing solid particles of the waste liquid to sink to the bottom in the standing state, allowing the oily liquid to float upwards to form a top layer, allowing the rest of the oily liquid to be aqueous solution, independently guiding and discharging the oily liquid on the top layer and concentrating, guiding the aqueous solution on a middle layer to a circulating purification device, wherein the water content of the aqueous solution is more than or equal to 85%, the mass proportion of the solid particles is less than or equal to 5%, the mass proportion of the oily liquid is less than or equal to 10%, allowing the aqueous solution to generate purified water in the circulating purification device, performing circulating filtration on the rest of the aqueous solution, and finally and intensively collecting the high-concentration waste liquid.

In the scheme, the mode of earlier-stage standing and matched circulating purification is adopted, the filtering effect of the waste liquid is improved, the earlier-stage standing is used for sinking metal and nonmetal solid particles in the original waste liquid, meanwhile, oily liquid with lighter specific gravity rises, the oily liquid is subjected to diversion separation after layering, the aqueous solution in the middle part is subjected to circulating purification to separate water in the oily liquid, after the earlier-stage standing treatment, the solid particles with large particle size are separated, most of the oily liquid is also separated, then the content of the solid and the oily liquid in the aqueous liquid sent into the circulating purification device is greatly reduced, the work load of the circulating purification device is reduced, the long-term stable online work of the circulating purification device is realized, the maintenance cost of equipment is low, the purified water can be directly put into production again, and the concentrated high-concentration waste liquid can be collected and treated in a centralized manner, the storage cost is greatly reduced, the cost for transporting to professional institutions is also greatly reduced relatively, and the post-treatment burden of production enterprises is reduced.

Further, circulation purifier includes jar body and membrane filter equipment, and the jar body is connected with the outlet pipe, and the outlet pipe is connected to membrane filter equipment, is provided with liquid supercharging device on the outlet pipe, flows to in the membrane filter equipment after the internal liquid pressure boost of jar, membrane filter equipment is provided with solid filter equipment and liquid permeation filter equipment, and the waste liquid gets into liquid permeation filter equipment after earlier through fixed filter equipment separation solid particle again, filters oily liquid and dissolved inorganic salt in liquid permeation filter equipment to produce the water purification, be provided with the air supporting device in the jar body, the air supporting device carries out the electrolysis to the waste liquid in the jar body. The jar body of circulation purifier is used for flowing liquid, provides liquid and backward flow liquid for membrane filter equipment, and the waste liquid carries out solid separation earlier and carries out the separation of water purification again, produces high-quality water purification, can directly be used for production, and the effect of purification is good, and the air supporting device can carry out the electrolysis to the waste liquid, produces the flocculent material, and the material of being convenient for deposits, and oily liquid is favorable to the come-up simultaneously, improves the effect of separation.

Further, solid filter equipment and liquid infiltration filter equipment all include the casing, install the solid filter core in solid filter equipment's casing with one heart, install the infiltration filter core with one heart in liquid infiltration filter equipment, the solid filter core and the infiltration filter core all shaping are the tubular structure, its outside is the stoste, the inboard is the filtrate, the both ends of casing are import and export respectively, the airtight switch-on in import and outside, export and the airtight switch-on in inboard, the waste liquid enters into the outside that contacts solid filter core and infiltration filter core by the import to enter into the inboard after filtering, later flow through the export. The casing is the main structure that the restriction waste liquid flows, and the waste liquid forms the filtrate behind the space between casing and the filter core and through the filter core, and the efficiency of work is good, and under the state of pressure boost, filterable quality is good.

Furthermore, solid structure of the solid filter core is provided with filter holes, and the filter holes are uniformly distributed and formed on the solid filter core. Solid particles are separated through the filtering holes, so that liquid can pass through, and the filtering efficiency is improved.

Furthermore, the filter element is penetrated by an oil-water separation membrane and a silicon carbide ceramic membrane, the oil-water separation membrane and the silicon carbide ceramic membrane are both formed into a cylindrical shape, the outer diameter of the silicon carbide ceramic membrane is smaller than the inner diameter of the oil-water separation membrane and are sleeved with each other, a gap is formed between the oil-water separation membrane and the silicon carbide ceramic membrane, and waste liquid sequentially passes through the oil-water separation membrane and the silicon carbide ceramic membrane. Dissolved substances and oily liquid in the liquid can not pass through the permeable membrane, purified water can be separated, the cylindrical structure is convenient to form, and the contact surface of filtration is large.

Furthermore, be provided with the backward flow mouth on the casing, the backward flow mouth is by the outside of casing to the inside intercommunication shaping of casing, and the unable part that passes through among solid filter equipment and the liquid permeation filtration device is flowed by the backward flow mouth to put through in the jar body through the pipeline. Filterable in-process can leave unable filtration and divide high concentration waste liquid, flows back to the jar body through the backward flow mouth in, can circulate and filter repeatedly, and filterable quality is better.

Further, the bottom of the tank body is provided with a discharge port, a valve is arranged on the discharge port, and the discharge port is connected to a concentrated waste liquid storage device through a liquid discharge pipeline. When the concentration of the waste liquid in the heating storage tank is higher, the waste liquid can be discharged in a centralized manner and can be handed to a professional treatment structure for treatment, the treatment cost is greatly reduced, and the transportation cost is correspondingly reduced.

Furthermore, the tank body and the membrane filtering device straight-through pipe are connected with each other, and the circulating purification device comprises a tank body and a membrane filtering device which are both provided with more than two shells and an internal filter element structure. The two-stage filtering device is connected through the straight pipe, the flowing efficiency is high, and the filtering pressure of liquid can be kept.

Compared with the prior art, the invention has the following advantages and effects: through the mode that adopts the earlier stage to stew and cooperate circulation purification in this scheme, the processing back that stews in the earlier stage, the solid particulate matter of big particle diameter is separated, and most oily liquid is also separated, the solid in the aqueous liquid that later sends into circulation purification device and the content of oily liquid reduce in a large number, circulation purification device's work burden has been reduced, the long-term stable online work of circulation purification device has been realized, the maintenance cost of equipment is low, the water purification after the purification can directly drop into production once more, concentrated high concentration waste liquid can concentrate the collection and handle, storage cost greatly reduced, and transport to the expense of professional mechanism's processing also relatively greatly reduced, reduce its manufacturing enterprise's aftertreatment burden.

Drawings

FIG. 1 is a schematic view of the structure of a circulation purification apparatus.

In the figure: 1. the device comprises a tank body, 2, a membrane filtering device, 3, an outflow pipe, 4, a solid filtering device, 5, a liquid permeation filtering device, 6, a shell, 7, a solid filtering core, 8, a permeation filtering core, 9 and a backflow port.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

A method for treating waste liquid of high-efficiency oil-water separation includes such steps as generating waste liquid, guiding the waste liquid, delivering the waste liquid to a collecting container, slowly flowing the waste liquid to stand, sinking solid particles to bottom, floating the oily liquid to top layer, collecting the aqueous solution in middle part, guiding the aqueous solution in top layer to discharge and concentrate, guiding the aqueous solution in middle layer to circulation purifier, circulating the aqueous solution in the middle layer to filter, and collecting the high-concentration waste liquid.

The circulation purification device comprises a tank body 1 and a membrane filtration device 2, wherein the tank body 1 is connected with an outflow pipe 3, the outflow pipe 3 is connected to the membrane filtration device 2, a liquid pressurization device is arranged on the outflow pipe 3, liquid in the tank body 1 flows into the membrane filtration device 2 after being pressurized, the membrane filtration device 2 is provided with a solid filtration device 4 and a liquid permeation filtration device 5, waste liquid firstly passes through a fixed filtration device to separate solid particles and then enters the liquid permeation filtration device 5, and oily liquid and dissolved inorganic salt are filtered out in the liquid permeation filtration device 5, and purified water is generated.

Solid filter equipment 4 and liquid permeation filtration device 5 all include casing 6, install solid filter element 7 in the concentric in solid filter equipment 4's casing 6, install the permeation filtration core 8 in the concentric in liquid permeation filtration device 5, solid filter element 7 and permeation filter element 8 all the shaping are the tubular structure, its outside is the stoste, the inboard is the filtrate, the both ends of casing 6 are import and export respectively, import and the airtight switch-on in outside, export and the airtight switch-on in inboard, the waste liquid enters into the outside that contacts solid filter element 7 and permeation filter element 8 by the import, and enter into the inboard after filtering, later flow through the export.

The solid structure of the solid filter element 7 is provided with filter holes, and the filter holes are uniformly distributed and formed on the solid filter element 7.

The infiltration filter element 8 adopts an oil-water separation membrane and a silicon carbide ceramic membrane, the oil-water separation membrane and the silicon carbide ceramic membrane are both formed into a cylindrical shape, the outer diameter of the silicon carbide ceramic membrane is smaller than the inner diameter of the oil-water separation membrane and are mutually sleeved, a gap is arranged between the oil-water separation membrane and the silicon carbide ceramic membrane, and waste liquid sequentially passes through the oil-water separation membrane and the silicon carbide ceramic membrane.

The shell 6 is provided with a return port 9, the return port 9 is formed by communicating the outside of the shell 6 to the inside of the shell 6, and the parts which cannot pass through the solid filtering device 4 and the liquid permeation filtering device 5 flow out of the return port 9 and are communicated with the tank body 1 through a pipeline.

The bottom of the tank body 1 is provided with a discharge port, a valve is arranged on the discharge port, and the discharge port is connected to a concentrated waste liquid storage device through a liquid discharge pipeline.

The tank body 1 and the membrane filtering device 2 are connected with each other through a pipe, and the circulating purification device comprises a tank body 1 and a membrane filtering device 2 which are both provided with more than two shells 6 and an internal filter element structure.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that the present embodiments be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.