CN106477670A - A kind of oil-containing emulsifies sewage breaking device - Google Patents

Abstract

The invention discloses an oil-containing emulsified sewage demulsification device, which is characterized in that the demulsification device includes a sewage treatment tank for demulsification treatment of sewage, and the side wall of the sewage treatment tank is provided with a sewage inlet, a sewage discharge outlet and The clean water outlet is filled with sewage, and is equipped with a gas-liquid mixing system, a high-speed injection system, a coalescence separation system, and several partitions. The invention mixes oxygen or ozone with tap water through a gas-liquid miscibility system to form a gas-liquid mixed flow liquid, which enters the high-efficiency injection system tangentially, rotates and rises in the conical liquid channel, reaches the outlet and mixes with sewage, and breaks through the emulsified oil , so that the oil-in-water emulsification and demulsification, small oil droplets gather, and float upward, reach the coalescence separation system, the oil droplets continue to coalesce on the coalescence plate, and reach the top of the coalescence plate, and the water with a larger specific gravity falls back to the sewage The lower part of the tank, and flows to the outlet through the partition. The invention has a reasonable design and realizes the demulsification of the emulsified oil with low energy consumption.

Description

A demulsification device for oily emulsified sewage

technical field

The invention relates to the environmental protection treatment industry, in particular to an oil-containing emulsified sewage demulsification device.

Background technique

Petroleum exploration, chemical production, urban life, ship operation, etc. will produce deeply emulsified oily sewage, which must be purified before being reused or discharged. The oily sewage in the present invention mainly exists in the form of oil-in-water. Since the particle size of the emulsified oil is extremely small (about 0.1-10 microns) and has certain stability, it is difficult to separate oil from water only by gravity sedimentation. Traditional and mature treatment methods are mostly carried out by means of dosing, flocculation, etc., because of high investment, complicated process, and subsequent generation of a large amount of sludge, which brings a huge burden to users; in addition, other existing treatments such as coalescence, cyclone, and ultrasonic Although the problem of oil-water separation has been solved to a certain extent, it is difficult to achieve stable sewage treatment and discharge. In my country's petroleum and petrochemical production, a large amount of oily emulsified wastewater will be produced. According to data, Daqing Oilfield can produce hundreds of millions of cubic meters of oily wastewater every year, and the purification of this part of the wastewater requires a lot of chemicals and high costs; so how to find Reliable and simple physical methods to treat sewage is an urgent problem for environmental protection personnel. In view of the above, the oil-containing emulsified sewage demulsification device of the present invention successfully solves the above related problems, has remarkable social and economic benefits, and is suitable for industrial applications.

Contents of the invention

In view of the above problems, the object of the present invention is to provide an oil-containing emulsified sewage demulsification device, which can realize the demulsification treatment of oil-containing emulsified sewage, and the demulsified sewage is separated from oil and water to meet the discharge standard.

The technical solution adopted by the present invention to solve the above technical problems is: an oily emulsified sewage demulsification device, characterized in that the demulsification device includes a sewage treatment tank for sewage demulsification treatment, and the side wall of the sewage treatment tank There are sewage inlets, sewage outlets and water purification outlets above. The sewage treatment tank is filled with sewage, and is equipped with a gas-liquid mixing system, a high-speed injection system, a coalescence separation system, and several partitions. The coalescence The separation system is set in the upper part of the sewage treatment tank, and the gas-liquid mixing system, high-efficiency injection system and several partitions are set under the coalescence separation system. The gas-liquid mixing system mixes ozone with water, and after mixing The gas-liquid flow enters the high-speed injection system. The high-speed injection system speeds up the gas-liquid flow. The high-speed spray system mixes evenly with the sewage in the sewage treatment tank and breaks the emulsion. The water is discharged from the clean water outlet after passing through several partitions.

Preferably, the high-speed injection system is a conical liquid channel, and the gas-mixed liquid after passing through the gas-liquid mixing system enters tangentially, and is ejected at high speed after spiral acceleration. The treatment box is fixedly connected, and the coalescing and separation system is fixedly connected with the inner wall of the sewage treatment tank, including several coalescing plates, and several partitions are arranged on one side of the high-speed injection system and below the coalescing and separating system, and alternately set up.

Preferably, the gas-liquid mixing system is a cylindrical pipeline with an injection unit inside, and a number of injection holes are arranged on the outer wall of the injection unit, and the injection unit and the gas-liquid mixing system The inner wall forms an injection cavity, through which the gas is injected through the injection hole and mixed with the liquid.

Preferably, the opening direction of the injection hole is inclined to the direction of liquid flow, and is arranged to be opposite to the direction of liquid flow.

The advantages of the present invention are:

1. The present invention mixes oxygen or ozone with tap water through a gas-liquid miscible system to form a gas-liquid mixed flow liquid, which enters the high-speed injection system tangentially, and after spiral acceleration, it is injected into the sewage and mixed evenly to make the oil-in-water Emulsification and demulsification, small oil droplets gather, float up, and reach the coalescence separation system. The oil droplets continue to coalesce on the coalescence plate and reach the top of the coalescence plate. The water with a larger specific gravity falls back to the lower part of the sewage tank and passes through the separation The plate flows to the outlet, the design of the invention is reasonable, and the demulsification of oily sewage is realized with low energy consumption;

2. The high-efficiency injection system is adopted to introduce the mixed liquid tangentially, so that the mixed liquid is spirally accelerated in the conical channel to realize high-speed rotary injection. A supplementary gas conduit is installed at the ejection outlet to supplement trace amounts of oxygen or ozone to increase the energy of the mixed liquid. The design is reasonable ;

3. The injection part is equipped with several injection holes, so that the gas can be directly mixed with the liquid after being sprayed through the injection holes, and the inclination angle of the set injection holes is just opposite to the flow direction of the liquid, so that the gas can be injected in reverse to achieve high-efficiency mixing. melting effect;

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required for the description of the specific embodiments or the prior art.

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

Fig. 2 is a schematic structural diagram of the gas-liquid mixing system of the present invention.

Fig. 3 is a structural schematic diagram of the high-speed injection system of the present invention.

in:

1. Sewage treatment tank 2. Sewage inlet 3. Sewage outlet 4. Clean water outlet 5. Gas-liquid mixing system 6. High-speed injection system 7. Coalescence separation system 8. Baffle

501, injection unit 502, high pressure spoiler 503, injection hole 504, injection cavity 505, flange 506, fixed edge 507, injection part 508, pressure reducing valve 509, pressure gauge

601, tapered liquid channel 602, tangential inlet 603, swivel outlet 604, make-up gas outlet 605, gas line

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

An oil-containing emulsified sewage demulsification device as shown in Figure 1-3 is characterized in that: the demulsification device includes a sewage treatment tank 1 for sewage demulsification treatment, and the side wall of the sewage treatment tank 1 is provided with Sewage inlet 2, sewage outlet 3 and clean water outlet 4, said sewage outlet 3 is arranged on the top of sewage treatment tank 1, said sewage treatment tank 1 is filled with sewage, and is equipped with a gas-liquid mixing system 5 , a high-speed injection system 6, a coalescence separation system 7, a plurality of partitions 8, the gas-liquid mixing system 5 is a cylindrical pipeline, and an injection unit 501 is provided inside, and the injection unit 501 is a hollow structure, A cylindrical water channel with the same axial direction is provided, and a number of injection holes 503 are provided on the outer wall of the injection unit 501, and the injection unit 501 and the inner wall of the gas-liquid mixing system 5 form an injection cavity 504, The injection cavity 504 is connected to the gas pipeline 605; the gas is injected at high speed through the injection hole of the injection unit, and quickly mixes with the passing liquid to realize gas-liquid mixed flow. The gas-liquid mixing system 5 and the high-speed injection system 6 Fixed connection, the high-speed injection system 6 is a conical liquid channel 601, the mixed solution after passing through the gas-liquid mixing system 5 enters the conical liquid channel 601 from the tangential inlet 602, and the top of the conical liquid channel 601 is a rotating Outlet 603, the gas-liquid mixed flow entering the high-injection system at a low speed enters tangentially and then rotates up at high speed inside. Due to the centrifugal force, the speed of the gas-liquid mixed flow is gradually accelerated during the rising process, and when it reaches the rotating outlet, the speed can reach that of the inlet. Several times, the gas-liquid mixed flow ejected from the rotating outlet collides and mixes with the emulsified sewage in the sewage treatment tank, breaking the emulsified liquid, breaking through the oil-in-water droplets, separating the oil and water, and completing the demulsification. Due to the low density, the final oil droplets continuously gather and float upwards and reach the coalescence separation system. The high-speed injection system 6 is arranged at the bottom of the sewage treatment tank 1 and is fixedly connected with the sewage treatment tank 1. The coalescence separation system 7 Set above the atomization system, including several coalescing plates, the coalescing and separating system 7 is fixedly connected with the inner wall of the sewage treatment tank 1, the oil droplets gather on the coalescing plates in the coalescing and separating system, and because of the density small, gradually float up, while the water phase gradually sinks to complete the separation after demulsification, and several partitions 8 are arranged on one side of the high-speed injection system 6 and below the coalescence separation system 7, and are arranged alternately.

Preferably, several supplementary gas outlets 604 are provided around the rotating outlet 603, the supplementary gas outlets 604 communicate with the gas pipeline 605, and the liquid inlet is arranged on the outer wall of the tapered liquid channel 601 near the open end, And the entering direction of the liquid is tangent to the tapered liquid channel 601 .

Preferably, the high-speed injection system 6 includes several conical liquid channels 601 , each conical liquid channel 601 is equipped with a liquid inlet, and the liquid entering direction is tangent to the conical liquid channel 601 .

Preferably, two ends of the gas-liquid mixing system 5 are welded with flanges 505, one end is connected to the tap water pipeline through the flange 505, and the other end is closed with a cover.

Preferably, several gas-liquid mixing systems 5 are connected in series through the flange 505 .

Preferably, the sewage inlet 2 and the clean water outlet 4 are respectively arranged on two side walls of the sewage treatment tank 1 that are far away from each other.

Preferably, the injection unit 501 is in the shape of an "I", including upper and lower fixed edges 506 and a central injection part 507. The injection unit 501 is a hollow structure with cylindrical channels with the same axial direction. The channel is for liquid circulation, the outer diameter of the fixed edge 506 is the same as the inner diameter of the miscible body, and the injection unit 501 is inserted into the miscible body by external force, so that the injection unit 501 is perfectly matched with the miscible body, and the The outer ring of the injection unit 501 and the inner wall of the miscible body form a distributed annular injection cavity 504. The injection part 507 is provided with a number of injection holes 503, and the injection holes 503 communicate with the channel. A gas inlet is provided on the outer wall of the miscible body corresponding to the injection cavity 504 , and the high-pressure spoiler 502 is arranged downstream of the injection unit 501 along the reverse flow of the liquid, and is fixedly connected with the gas-liquid mixing system 5 .

Preferably, the opening direction of the injection hole 503 is inclined to the direction of liquid flow, and is arranged to be opposite to the direction of liquid flow.

Preferably, the demulsification device further includes a pre-fast filter device to prevent solid waste in the sewage from clogging the demulsification.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (4)

1. A kind of oil-containing emulsified sewage demulsification device, it is characterized in that: demulsification device comprises the sewage treatment tank that is used for sewage demulsification treatment, and described sewage treatment tank casing side wall is provided with sewage inlet, dirt discharge outlet and The clean water outlet, the sewage treatment tank is filled with sewage, and is equipped with a gas-liquid mixing system, a high-speed injection system, a coalescence separation system, and several partitions, and the coalescence separation system is arranged in the sewage treatment tank. In the upper part, a gas-liquid mixing system, a high-speed injection system and several partitions are arranged below the coalescence separation system. The injection system enters the sewage treatment tank to realize mixing with sewage and demulsification. After demulsification, the dirty oil is collected and discharged from the dirty oil outlet, and the treated water is discharged from the clean water outlet through several partitions. 2. A kind of demulsification device for oily emulsified sewage according to claim 1, characterized in that: the high-speed injection system is a conical liquid channel, and the mixed solution after passing through the gas-liquid mixing system enters the conical liquid channel, so The top of the conical liquid channel is the gas-liquid fluid outlet, the high-speed injection system is arranged at the bottom of the sewage treatment tank, and is fixedly connected with the sewage treatment tank, and the coalescence separation system is fixedly connected with the inner wall of the sewage treatment tank, including Several coalescing plates, several partitions are arranged on one side of the high-speed injection system and below the coalescing and separating system, and are arranged alternately. 3. A demulsification device for oily emulsified sewage according to claim 1, characterized in that: the gas-liquid mixing system is a cylindrical pipeline with a spray unit inside, and the outer wall of the spray unit A number of injection holes are arranged on the top, and the injection unit forms an injection cavity with the inner wall of the gas-liquid mixing system, and the gas is injected into the injection cavity through the injection holes to mix with the liquid. 4. The demulsification device for oil-containing emulsified sewage according to claim 1, characterized in that: the opening direction of the injection hole is inclined to the direction of liquid flow, and is set at an inclination opposite to the direction of liquid flow.