CN216764509U - Coalescence adsorption oil-water efficient separation device - Google Patents
Coalescence adsorption oil-water efficient separation device Download PDFInfo
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- CN216764509U CN216764509U CN202123433706.1U CN202123433706U CN216764509U CN 216764509 U CN216764509 U CN 216764509U CN 202123433706 U CN202123433706 U CN 202123433706U CN 216764509 U CN216764509 U CN 216764509U
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Abstract
The application discloses a coalescence-adsorption oil-water efficient separation device, which comprises a precision filter, a coalescence separator and an adsorption oil remover; oily sewage enters the precision filter through an oily sewage feeding pipe, the effluent of the precision filter enters the coalescence separator through a coalescence separator feeding pipe, the coalescence separator is provided with a coalescence separator oil discharge pipe for discharging oil, a coalescence separator drain pipe for discharging water, the coalescence separator drain pipe is connected to the adsorption oil remover, and the adsorption oil remover is provided with an adsorption oil remover oil discharge pipe for discharging oil and a purified water outlet pipe as a purified water discharge pipe of the whole device for discharging purified water. The process route treatment technology of coalescence and adsorption separation is adopted to carry out demulsification and deoiling treatment on the oily sewage of the delayed coking device, so that oil-water separation is realized, the treatment requirement index of a downstream sewage stripping device is met, and the environment-friendly and economical treatment of the oily sewage of the coking device is achieved.
Description
Technical Field
The application relates to a coalescence-adsorption oil-water efficient separation device, which is particularly suitable for demulsification and deoiling treatment of oily sewage in the petrochemical field and belongs to the technical field of coalescence-adsorption treatment of oily sewage.
Background
With the complex water quality component of the oily sewage of the delayed coking device, the ammonia nitrogen and the oil concentration are high, and the oily sewage contains a large amount of organic pollutants such as coke powder, sulfide, phenol and the like, and is high-concentration and high-emulsification organic wastewater which has poor biodegradability and is difficult to treat by a stripping method. The concentration of pollutants in the coking oil-containing sewage far exceeds the water inlet standard of a stripping device, in particular to suspended substances such as sump oil, rubber powder and the like. If the waste water enters the stripping device directly, the waste water contains oil, the gas-liquid mass transfer resistance in the stripping tower is increased, hydrogen sulfide and ammonia are difficult to strip to a gas phase from the waste water, the waste water carries coke powder, tower trays are easy to block, the tower mass transfer efficiency is reduced, a reboiler at the bottom of the stripping tower is easy to block, the heat transfer resistance of the reboiler is increased, the energy consumption is increased, the normal production of the waste water treatment device is seriously influenced, and the negative influence is brought to the benefit and the environmental protection of the delayed coking device. Therefore, before the delayed coking oily sewage enters the stripping device, the delayed coking oily sewage must be strictly subjected to oil removal and coke powder suspension removal treatment.
The conventional method for treating suspended matters in oil removal and coke powder removal of oil-containing sewage of delayed coking mainly comprises a sand and coke filtering method, a gravity settling method, a centrifugal, jet flow or air-entrapping flotation method, a chemical demulsification method and a ceramic membrane filtering method, wherein the oil removal rate of the methods is usually low (generally about 30-45%), the labor intensity is high, the operation cost is high, and the stable operation is relatively difficult although the oil removal efficiency of an air floatation method is still enough; the gravity settling method can remove heavy oil and floating oil, but generally is used as a pretreatment means, and because the particle size of rubber powder in the coking oil-containing wastewater is small, the coking oil-containing wastewater is difficult to settle, and the settling speed of solid particles is relatively slow, if the coking oil-containing wastewater reaches higher treatment efficiency, longer residence time and a correspondingly larger oil separation sedimentation tank are needed, and the occupied area and the investment are larger; the chemical demulsification sedimentation method has large usage amount of chemical agents, high operation cost of oily sewage treatment and poor economical efficiency; while the pure ceramic membrane separation method has high filtration precision and can effectively realize the separation of oil and rubber powder suspended matters in water, the rubber powder blocks a pore channel during operation, the flux of a ceramic membrane is reduced, the service life is influenced, and the investment cost is increased.
Therefore, although a single treatment method can realize the separation of oil, water and solid in the oily sewage of the coking device to a certain extent, the single treatment method has the disadvantages of low efficiency and low cost.
SUMMERY OF THE UTILITY MODEL
The application aims at the characteristics of oily sewage of a coking device and provides an oily sewage treatment technology which is economical, feasible, reliable in performance, high in treatment efficiency, safe and environment-friendly.
In order to achieve the purpose, the technical scheme of the application provides a coalescence-adsorption oil-water efficient separation device which is characterized by comprising a precision filter, a coalescence separator and an adsorption oil remover; oily sewage enters the precision filter through an oily sewage feeding pipe, the effluent of the precision filter enters the coalescence separator through a coalescence separator feeding pipe, the coalescence separator is provided with a coalescence separator oil discharge pipe for discharging oil, a coalescence separator drain pipe for discharging water, the coalescence separator drain pipe is connected to the adsorption oil remover, and the adsorption oil remover is provided with an adsorption oil remover oil discharge pipe for discharging oil and a purified water outlet pipe as a purified water discharge pipe of the whole device for discharging purified water.
Preferably, the oil discharge pipe of the coalescence separator and the oil discharge pipe of the adsorption oil remover are communicated and then set as a dirty oil discharge pipeline of the whole device.
Preferably, the feed pipe of the coalescence separator is provided with a branch pipe serving as a bridging pipe of the coalescence separator and connected to the drain pipe of the coalescence separator, and the outlet water of the precision filter directly enters the adsorption oil remover through the feed pipe S of the coalescence separator, the bridging pipe of the coalescence separator and the drain pipe of the coalescence separator in sequence; the jumper tube of the coalescence separator is provided with a coalescence separator bypass valve.
Preferably, the drainage pipe of the coalescence separator is provided with a branch pipe which is used as a jumper pipe of the adsorption oil remover and is directly connected to the purified water outlet pipe; the jumper tube of the adsorption degreaser is provided with a bypass valve of the adsorption degreaser.
The application provides an economical and feasible, reliable in performance, high in treatment efficiency, safe and environment-friendly oily sewage treatment technology aiming at the characteristics of oily sewage of a coking device. Because the oily sewage of the delayed coking device is seriously emulsified, the single treatment method cannot economically and effectively destroy the surface tension of an oil-water interface to realize oil-water separation, the process route treatment technology of coalescence and adsorption separation is adopted to carry out demulsification and oil removal treatment on the oily sewage of the delayed coking device to realize oil-water separation, meet the treatment requirement index of a downstream sewage stripping device, and achieve the environment-friendly and economical treatment of the oily sewage of the coking device.
Drawings
FIG. 1 is a diagram of a coalescing adsorption oil-water high-efficiency separation device provided in an example;
reference numerals are as follows: 1-precision filter, 2-coalescence separator, 3-adsorption degreaser, 4-coalescence separator bypass valve, 5-adsorption degreaser bypass valve, S1-oily sewage feed pipe, S2-coalescence separator feed pipe, S3-coalescence separator oil discharge pipe, S4-coalescence separator drain pipe, S5-adsorption degreaser oil discharge pipe, S6-purified water outlet pipe, S7-coalescence separator jumper pipe, S8-adsorption degreaser jumper pipe.
Detailed Description
In order to make the present application more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
The embodiment provides a coalescence-adsorption oil-water high-efficiency separation device, as shown in fig. 1, which comprises a precision filter 1, a coalescence-separator 2 and an adsorption oil remover 3; the precision filter 1 is used for filtering and removing solid particles in oily sewage, the coalescence filter element is arranged in the coalescence separator 2 and is used for removing most of oil in the oily sewage, and the polymer adsorption material is arranged in the adsorption oil remover 3 and is used for deep oil-water separation of the oily sewage and can be used for purifying the oily sewage of a delayed coking device;
oily sewage enters a precision filter 1 through an oily sewage feeding pipe S1, the effluent of the precision filter 1 enters a coalescence separator 2 through a coalescence separator feeding pipe S2, the coalescence separator 2 is provided with a coalescence separator oil discharge pipe S3 for discharging oil, a coalescence separator drain pipe S4 for discharging water, a coalescence separator drain pipe S4 is connected to an adsorption oil eliminator 3, the adsorption oil eliminator 3 is provided with an adsorption oil eliminator oil discharge pipe S5 for discharging oil, and a purified water outlet pipe S6 is used as a purified water discharge pipe of the whole device for discharging purified water;
the oil discharge pipe S3 of the coalescence separator 2 and the oil discharge pipe S5 of the adsorption oil remover 3 of the coalescence separator are communicated as oil discharge lines and then used as dirty oil discharge pipelines of the whole device to enter a downstream sewage treatment device.
If the oil content of the oily sewage is lower, for example, lower than 500mg/l, after the oily sewage is filtered by the precision filter 1, the coalescer feed pipe S2 may be provided with a branch pipe as a coalescer jumper pipe S7 directly connected to the coalescer drain pipe S4, and the effluent of the precision filter 1 directly enters the adsorption degreaser 3 through the coalescer feed pipe S2, the coalescer jumper pipe S7 and the coalescer drain pipe S4 in sequence; the coalescer jumper tube S7 is provided with a coalescer bypass valve 4.
If the oil content of the effluent from the coalescer 2 meets the discharge requirement, the coalescer drain pipe S4 may be provided with a branch pipe as an adsorption degreaser jumper pipe S8 directly connected to the purified water outlet pipe S6, i.e. connected to the purified water discharge line of the whole apparatus; the adsorption degreaser jumper pipe S8 is provided with an adsorption degreaser bypass valve 5.
The working process of the separation device provided by the embodiment is as follows:
the oil-containing sewage raw material parameters of the delayed coking device to be treated are as follows: oil content: 200-50000 mg/L;
A. oily sewage of the delayed coking device enters the precision filter 1 through an oily sewage feeding pipe S1;
B. setting the parameters of the precision filter 1 as the parameters for removing the particles larger than 10 mu in the medium;
C. the oily sewage purified by the precision filter 1 enters a coalescence separator 2 after passing through a coalescence separator feeding pipe S2;
D. setting parameters of the coalescence-separation device 2: the oil content in the outlet water phase is lower than 500mg/l, and the water content in the outlet oil phase is lower than 0.1%;
E. after pretreatment by the coalescence separator 2, the filtered oil phase is merged into a dirty oil discharge pipeline through a coalescence separator oil discharge pipe S3, and the water phase enters an adsorption oil remover 3 through a coalescence separator water discharge pipe S4 for deep oil removal;
F. the oil phase treated by the adsorption oil remover 3 is merged into a dirty oil discharge pipeline through an oil discharge pipe S5 of the adsorption oil remover, and the water phase is merged into a purified water discharge pipeline through a purified water outlet pipe S6;
G. setting parameters of an adsorption oil remover: the oil content in the outlet water phase is lower than 150mg/l, and the water content in the outlet oil phase is lower than 0.1%.
In the embodiment, the coalescence material is used for coalescing water drops and oil drops in a liquid phase to carry out primary oil-water separation, and then the polymer adsorption material is used for carrying out deep oil-water separation on the oil-containing sewage after coalescence treatment so as to achieve the purpose of high-purity oil-water separation and meet the continuous treatment requirement of a downstream device; after the coalescence oil removal is carried out by the process technology, the oil content in the oily sewage is reduced to be below 500mg/l, the oil content in the oily sewage is reduced to be below 150mg/l after deep oil-water separation, and the water content in the discharged dirty oil is less than 0.1 percent. The technology can deeply remove the dirty oil and suspended matters in the oily sewage and meet the requirements of acidic water stripping and feeding.
Claims (4)
1. The efficient oil-water separation device by coalescence-adsorption is characterized by comprising a precision filter (1), a coalescence-separator (2) and an adsorption oil remover (3); oily sewage enters the precision filter (1) through an oily sewage feeding pipe (S1), the effluent of the precision filter (1) enters the coalescence separator (2) through a coalescence separator feeding pipe (S2), the coalescence separator (2) is provided with a coalescence separator oil discharge pipe (S3) for discharging oil, and a coalescence separator drain pipe (S4) for discharging water, the coalescence separator drain pipe (S4) is connected to the adsorption degreaser (3), and the adsorption degreaser (3) is provided with an adsorption degreaser oil discharge pipe (S5) for discharging oil, and a purified water outlet pipe (S6) serving as a purified water discharge pipe of the whole device for discharging purified water.
2. The efficient oil-water separator with coalescence adsorbent according to claim 1, wherein the oil discharge pipe (S3) of the coalescence separator (2) and the oil discharge pipe (S5) of the adsorption oil remover (3) are connected to each other and form a dirty oil discharge line of the entire apparatus.
3. The efficient oil-water separation device by coalescence adsorption of claim 1, wherein the coalescence separator feeding pipe (S2) is provided with a branch pipe as a coalescence separator jumper pipe (S7) connected to the coalescence separator drainage pipe (S4), and the outlet water of the precision filter (1) directly enters the adsorption oil remover (3) through the coalescence separator feeding pipe (S2), the coalescence separator jumper pipe (S7) and the coalescence separator drainage pipe (S4) in sequence; the coalescer jumper tube (S7) is provided with a coalescer bypass valve (4).
4. The coalescing adsorption oil-water high efficiency separating device according to claim 1, wherein the coalescing separator drain pipe (S4) is provided with a branch pipe as an adsorption degreaser jumper pipe (S8) directly connected to the purified water outlet pipe (S6); the adsorption degreaser jumper pipe (S8) is provided with an adsorption degreaser bypass valve (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123433706.1U CN216764509U (en) | 2021-12-30 | 2021-12-30 | Coalescence adsorption oil-water efficient separation device |
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| CN202123433706.1U CN216764509U (en) | 2021-12-30 | 2021-12-30 | Coalescence adsorption oil-water efficient separation device |
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