CN101961567B - Oil-removing three-phase separator - Google Patents

Abstract

A three-phase separator for oil removal is characterized in that a water inlet pipe is arranged at the lower section of the separator, and a water inlet guide cylinder is arranged at the upper part of the outlet of the water inlet pipe, and the two are connected by reinforcement. The side wall of the separator is provided with an overflow tank in the circumferential direction, the overflow tank is connected to the water outlet pipe, and the multi-stage multi-baffle separation assembly is arranged between the water inlet guide cylinder and the overflow tank, so that a 10- 20cm dense phase oil layer. The oil and water separation effect of the invention is good.

Description

A three-phase separator for oil removal

technical field

The invention relates to a three-phase separator for oil removal, which can be used for the separation of three-phase media containing oil, gas and water in conventional oil removers, and is especially suitable for the separation of oil, gas and water including coarse-grained oil removers. Separation can also be used for gas, solid and liquid three-phase separation including downflow three-phase biological fluidized bed, etc. It belongs to the technical field of sewage (waste) water treatment.

Background technique

Oily wastewater widely exists in the process of petroleum extraction and refining, processing of oil products and oily products, and domestic sewage including catering industry, and is one of the main sources of environmental pollution. Through the oil-water separation process, the oil in the sewage (waste) water can be removed and recycled, which can effectively reduce environmental pollution and improve the utilization rate of oil resources. Among them, the oil-water separation efficiency is subject to the structure, function and effect of the oil-water separator. In many oil-water separators, through aeration and other methods, the adsorption of air bubbles to fine oil particles and the floating speed are enhanced to improve the degreasing effect. Typical coarse-grained degreasers, through the contact of oily wastewater and solid fillers, The bubbles formed by adsorption, interception and aeration adhere to the surface of the oil and drag them up, thus greatly improving the separation effect of oil and water. In this process, the final separation of oil, gas and water three-phase substances is the key to promote the removal and recovery of oily substances.

Figure 1 is a schematic diagram of the working principle of a conventional oil-water separator. The separator 2 is set above the degreaser 1. Depending on the gravity difference between the oil and water, the oil is naturally floated up and separated from the water by setting a single inclined partition. It has a certain effect on slick oil, but it has little effect on emulsified oil, dispersed oil and soluble oil; many coarse-grained degreasers, due to the unreasonable three-phase separation process, make the already formed larger oil Particles cannot be effectively separated, which affects the oil removal efficiency. Based on this, the present invention proposes a multi-stage, multi-baffle type oil removal three-phase separator that can greatly improve the oil removal efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide an oil removal three-phase separator capable of separating oil, gas and water three-phase substances in oily wastewater and effectively recovering useful oil resources. It can also be used for the three-phase separation of gas, solid and liquid, including the following three-phase biological fluidized bed.

In order to solve the problems of the technologies described above, the present invention is achieved in that:

A three-phase separator used for the separation of oil, gas and water in the treatment of oily wastewater, including: a three-phase separator connected to the oil remover and an oily wastewater inlet pipe located in the separator, a water inlet guide cylinder, an overflow Groove, outlet pipe, multi-stage and multi-baffle separation components. Wherein, the water inlet pipe is located at the lower section of the separator, and the water inlet guide cylinder is located at the upper part of the outlet of the water inlet pipe, and is connected with the outlet elbow of the water inlet pipe with reinforcement. Outlet pipe: The multi-stage and multi-baffle separation assembly is located between the water inlet guide cylinder and the oil overflow tank, so that a 10-20cm dense phase oil layer is formed under the liquid surface of the oil overflow tank. The separator is equipped with different levels of multi-stage and multi-baffle separation components in the vertical direction. The same-level partitions are arranged symmetrically, and the angle between them and the horizontal plane is 40-50°. The same-side partitions of different levels are parallel to each other. The bulkhead assembly consists of more than two bulkheads. The cross-section of the separator is rectangular or circular, and a plurality of installation joint plates are arranged around the inner wall of the separator. Bolts or pins are used between the partition plates and the joint plates, so that the multi-stage and multi-partition plates can separate the assembly and the cylinder to achieve Detachable fixed.

Compared with the existing separator, the present invention has the following advantages:

In order to solve the problems of low oil-water (or oil, gas, water) separation efficiency and poor oil removal effect of many oil-water separators (oil removers) in the past, the invention separates the water inlet guide cylinder and the multi-stage multi-baffle plate The organic combination makes it the core unit for separating oil and water, so as to achieve the following functions: 1) Through the reverse flow guide effect of the water inlet guide cylinder, the oil-water mixture entering the water inlet pipe is deflected downward along the inner wall of the guide cylinder, showing a concave shape Inertial detour, under the action of centrifugal force, the heavy water goes down and enters the degreaser under the separator for further separation, while the light oil floats up to realize the partial oil and water separation effect of the incoming water; 2) The dense-phase oil and water (or oil, gas, water) mixture separated and floated by the degreaser further promotes the upward movement of the oil particles in the oil and water mixture that the flow guide tube inertially circles while floating itself; 3) the above The two streams of floating dense phase oil-water (or oil, gas, water) mixture flow together and further enter the multi-stage multi-baffle separation assembly, through the outward flow guide of the multi-stage multi-baffle separation assembly and the adhesion of oil particles on the lower surface of the partition The effect is to make the oil particles further aggregate and grow up, accelerate the floating and separation, which is beneficial to the floating and separation of larger oil particles, and merge into the dense phase oil layer under the liquid surface of the oil overflow tank; The multi-stage multi-baffle separation component is on the top, so that the two liquid streams do not mix with each other. Through the multi-stage aggregation and separation of the multi-stage multi-baffle separation component, the oil and water separation effect can be greatly improved. The inventor's previous application practice shows that the oil-water separation efficiency can usually be increased by more than 30%.

Description of drawings

Figure 1. Working principle diagram of conventional oil-water separator;

Fig. 2. basic structural representation of oil, gas, water three-phase separator of the present invention;

Figure 3. The process flow of the water inlet diversion device and the cross-section of the diversion tube;

Figure 4. Structural diagram of multi-stage and multi-baffle separation components.

Explanation of main symbols in the drawings: separator cylinder 21, oily wastewater inlet pipe 22, water inlet guide cylinder 23, oil overflow tank 24, water outlet pipe 25, multi-stage and multi-baffle separation assembly 26

Detailed ways

The present invention will be further described in detail below in combination with specific embodiments.

Referring to Figures 2 to 4, in the oil removal three-phase separator 2, it includes a three-phase separator cylinder 21 communicated with the oil remover 1 and an oily waste water inlet pipe 22 located in the three-phase separator, and the water inlet guide cylinder 23, an oil overflow tank 24, a water outlet pipe 25, and a multi-stage and multi-baffle separation assembly 26.

The water inlet pipe 22 is located at the lower section of the three-phase separator, the outlet of the water inlet pipe is bent upwards, the water inlet guide cylinder 23 is located at the upper part of the water inlet pipe outlet, and is connected with the outlet elbow of the water inlet pipe with reinforcement, and the oil overflow tank 24 is located at The upper side of the separator cylinder 21 is arranged along the periphery, the outlet pipe 25 is located on the side of the three-phase separator cylinder 21 and communicates with the oil overflow tank 24, and the multi-stage and multi-baffle separation assembly 26 is located on the upper part of the water inlet guide cylinder 23 And under the oil overflow tank 24, make the dense phase oil layer of 10-20cm be formed under the oil overflow tank liquid level. According to the diameter, height and oil concentration of the three-phase separator, the multi-stage and multi-baffle separation components can be set, and each stage can be equipped with multiple partitions. Symmetrical or axisymmetric radial, with a radiation angle of 40-50°, different levels of partitions on the same side are parallel to each other, and each level is used as an assembly. A plurality of installation joint plates are arranged around the inner wall of the separator, so that the multi-stage and multi-baffle separation components and the cylinder body can be detachably fixed.

The oily waste water enters from the curved upward water inlet pipe 22, and goes straight up to the inverted bowl-type water inlet guide cylinder 23. Through the reverse flow guide effect of the guide cylinder 23, the oil-water mixture entering the water inlet pipe 22 is deflected downward, showing a concave inertia. Circumvention, under the action of centrifugal force, the heavier water goes down, enters the degreaser 1 under the oil-water separator 2 for further separation, and the lighter oil floats up to realize the partial oil and water separation effect of the water inlet; The dense-phase oil and water (or oil, gas, water) mixture that is separated and floated by the degreaser 1 floats on its own, and further promotes the upward movement of the oil particles in the oil-water mixture that the flow guide tube inertially circles; The floating dense phase oil-water (or oil, gas, water) mixture converges, and further enters the multi-stage multi-baffle separation assembly 26, through the external flow guide effect of the multi-stage multi-baffle separation assembly 26 and the adhesion of oil particles on the lower surface of the partition The effect is to make the oil particles further gather and grow up, accelerate to float up, enter the oil overflow tank 24, and flow out of the three-phase separator cylinder 21 through the water outlet pipe 25.

The above specific embodiments do not limit the technical solutions of the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims (1)

1. A degreasing three-phase separator, characterized in that it comprises: a water inlet pipe, a water inlet guide cylinder, an overflow tank, a water outlet pipe, a multi-stage multi-baffle separation assembly, the water inlet pipe is located at the lower section of the separator, and the water inlet pipe The outlet of the separator is bent upwards, the water inlet guide cylinder is set on the upper part of the outlet of the water inlet pipe, and connected with the outlet elbow of the water inlet pipe with reinforcement, the side wall of the separator is provided with an overflow groove around the circumference, and the overflow groove is connected to the outlet pipe, multi-stage The multi-baffle separation assembly is arranged between the water inlet guide cylinder and the overflow tank, so that a 10-20 cm dense phase oil layer is formed under the liquid level of the overflow tank; the separator is provided with different stages of multi-stage Multi-baffle separation module, the partitions of the multi-stage multi-baffle separation module of the same level are arranged symmetrically, and the included angle with the horizontal plane is 40-50°, and the same-side partitions of different levels of multi-stage multi-baffle separation modules are parallel to each other , each stage of multi-stage multi-baffle separation assembly contains more than two partitions; The cross-section of the separator is rectangular or circular, and a plurality of installation joint plates are arranged around the inner wall of the separator, so that the multi-stage and multi-partition separation components are detachably fixed to the cylinder body.

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