CN204490674U - A kind of Novel oil refining wastewater comprehensive treatment system - Google Patents
A kind of Novel oil refining wastewater comprehensive treatment system Download PDFInfo
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- CN204490674U CN204490674U CN201520164188.3U CN201520164188U CN204490674U CN 204490674 U CN204490674 U CN 204490674U CN 201520164188 U CN201520164188 U CN 201520164188U CN 204490674 U CN204490674 U CN 204490674U
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Abstract
The utility model relates to a kind of Novel oil refining wastewater comprehensive treatment system, it comprises pretreatment unit, sewage enrichment unit, supercritical water oxidation unit, described sewage enrichment unit comprises the oil removal--air flotation pool and intermediate regulations pond that are communicated with successively, the entrance of described oil removal-air flotation pool connects the outlet of described pretreatment unit, and the pure water outlet in described intermediate regulations pond connects clean water basin; The overcritical water oxidization reactor of described supercritical water oxidation unit, gas solid separation system, Separate System of Water-jet connect successively, the fuel inlet of overcritical water oxidization reactor connects described starting fluid system, the oxygen intake of overcritical water oxidization reactor connects described oxygen supply system, the sewage inlet of described overcritical water oxidization reactor connects the dense water out in described intermediate regulations pond, and the outlet of described Separate System of Water-jet connects described clean water basin.The combination of the utility model oil removal-air supporting enrichment and supercritical water oxidation enables the refinery water of wider COD value carry out supercritical water oxidation process, realizes no pollution discharge, reclaims large energy simultaneously, solve a difficult problem for refinery water process.
Description
Technical field
The utility model belongs to sewage disposal and energy resource circulation and stress field, relates to a kind of Novel oil refining wastewater comprehensive treatment system.
Background technology
The principal pollutant matter of refinery water is that COD pollutes, and waste water composition is complicated.Oil refining and petrochemical wastewater, except containing except oil, sulphur, phenol, prussiate, COD, also contain multiple organic chemistry product, as polycyclic aromatic hydrocarbon compounds, aromatic amine compounds, heterogeneous ring compound etc.Principal pollutant in waste water, generally can be summarized as hydro carbons and soluble organic and inorganic component.The wherein heavy metal of soluble inorganic component mainly hydrogen sulfide, chlorine compound and trace; The large multipotency of soluble organic constituent is degraded by Institute of Micro-biology, also has small portion to be difficult to biological degradation.In waste water, the nutritive ingredient such as nitrogenous, the phosphorus of institute is often unbalanced.Waste water quality with the former oil properties of processing and technological process different with method and alter a great deal.Normal produce the water quality of discharge and open, the water quality difference of discharging between shut-down initial stage and turn(a)round is larger.Wherein a large amount of pollution is COD, and main component is petroleum-type and volatile phenol.If use traditional chemistry, physics, anaerobic technology can not reclaim resource wherein and the energy, and processing costs is higher, is difficult to accomplish complete harmless treatment, easily causes the appearance of secondary pollution.
Therefore, need to seek a kind of refinery water total system be more suitable for.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, for existing refinery water treatment technology Problems existing, provide that a kind of processing efficiency is high, no pollution discharge, simple to operate, the energy and resource recycling, saving input, Novel oil refining wastewater comprehensive treatment system that processing cost is lower can be realized simultaneously.
A kind of Novel oil refining wastewater comprehensive treatment system, it is characterized in that: comprise pretreatment unit, sewage enrichment unit, supercritical water oxidation unit, described sewage enrichment unit comprises the oil removal--air flotation pool and intermediate regulations pond that are communicated with successively, the entrance of described oil removal-air flotation pool connects the outlet of described pretreatment unit, and the pure water outlet in described intermediate regulations pond connects clean water basin, described supercritical water oxidation unit comprises oxygen supply system, starting fluid system, overcritical water oxidization reactor, gas solid separation system, Separate System of Water-jet, wherein, overcritical water oxidization reactor, gas solid separation system, Separate System of Water-jet connects successively, the fuel inlet of overcritical water oxidization reactor connects described starting fluid system, the oxygen intake of overcritical water oxidization reactor connects described oxygen supply system, the sewage inlet of described overcritical water oxidization reactor connects the dense water out in described intermediate regulations pond, the outlet of described Separate System of Water-jet connects described clean water basin.
The sewage inlet of described overcritical water oxidization reactor connects the dense water out in described intermediate regulations pond by a membrane concentration assembly, described membrane concentration assembly comprises the film filter of one or more series connection.
Described overcritical water oxidization reactor comprises cylindrical shell, burner, evaporation wall; Described inner barrel arranges evaporation wall with one heart, the narrow gap closed of the multistage annular along cylindrical shell axial distribution is formed between described evaporation wall and cylindrical shell, each described narrow gap has water inlet on cylindrical shell, the liquid passed into via water inlet can be infiltrated by described evaporation wall, forms moisture film at evaporation wall internal surface; Burner stretches into from cylindrical shell top, and the burner of described burner is positioned at cylindrical shell, and cylindrical shell top is shaped with sewage inlet and oxygen intake, and burner is shaped with fuel inlet and oxygen intake, and cylinder body bottom is shaped with liquid outlet.
Described evaporation wall is made of porous materials.
Another outlet of described gas solid separation connects solid salt collecting device.
Arrange heat exchange system between described gas solid separation system and Separate System of Water-jet, the vapour outlet of described heat exchange system connects steam utilization equipment.
Pneumatic outlet Bonding pressure energy recovery system, oxygen enrichment reclaiming system and the described oxygen supply system successively of described Separate System of Water-jet.
Advantage of the present utility model and beneficial effect are:
1, Novel oil refining wastewater comprehensive treatment system of the present utility model, for situation about polluting for COD a large amount of in refinery water, adds oil removal-air supporting process of enriching and concentrates waste water in the front end of supercritical water oxidation technique.Organism in dense water is highly enriched, enters supercritical water oxidation system and processes; Product water simultaneously through membrane concentration technique is that middle water carries out reuse.The combination of oil removal-air supporting enrichment and supercritical water oxidation (SCWO) enables the refinery water polluted for COD in a large number carry out supercritical water oxidation process, realizes no pollution discharge, recycles ample resources and energy simultaneously, save and drop into.
2, Novel oil refining wastewater comprehensive treatment system of the present utility model, because the COD value of refinery water can not reach the standard of directly carrying out supercritical water oxidation, therefore before entering overcritical water oxidization reactor, needs the sewage after to adjustment to concentrate.Namely sewage after concentrated be suitable for carrying out supercritical water oxidation.
Accompanying drawing explanation
Fig. 1 is Novel oil refining wastewater comprehensive treatment system structural representation;
Fig. 2 is the structural representation of the overcritical water oxidization reactor in the utility model.
Description of reference numerals
Equalizing tank 1, containing oil removal-air flotation pool 2, intermediate regulations pond 3, first medicine system 4, second medicine system 5, clean water basin 6, starting fluid system 7, supercritical water oxidation (SCWO) reactor 8, gas solid separation system 9, heat exchange system 10, Separate System of Water-jet 11, pressure energy recovery system 12, oxygen supply system 13, solid salt collecting device 14, connect steam utilization equipment 15, oxygen enrichment reclaiming system 16.Cylindrical shell 17, water inlet 18, narrow gap 19, sewage inlet and oxygen intake 20, fuel inlet and oxygen intake 21, burner 22, evaporation wall 23, liquid outlet 24.
Embodiment
Below by specific embodiment, the utility model is described in further detail, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of Novel oil refining wastewater comprehensive treatment system, comprise pretreatment unit, sewage enrichment unit, supercritical water oxidation unit, pretreatment unit, sewage enrichment unit, supercritical water oxidation unit are communicated with successively.
Pretreatment unit, comprise equalizing tank 1, first medicine system 4, equalizing tank is communicated with the first medicine system.
Sewage enrichment unit, comprise oil removal-air flotation pool 2, second medicine system 5, intermediate regulations pond 3, clean water basin 6, oil removal-air flotation pool, intermediate regulations pond, clean water basin are communicated with successively, and the second medicine system is communicated with oil removal-air flotation pool.
Supercritical water oxidation unit, comprise oxygen supply system 13, starting fluid system 7, supercritical water oxidation (SCWO) reactor 8, gas solid separation system 9, heat exchange system 10, pressure energy recovery system 11, Separate System of Water-jet 12, oxygen enrichment reclaiming system 16, oxygen supply system, starting fluid system is all communicated with supercritical water oxidation (SCWO) reactor, supercritical water oxidation (SCWO) reactor, gas solid separation system, heat exchange system, pressure energy recovery system, Separate System of Water-jet, oxygen enrichment reclaiming system is communicated with successively, Separate System of Water-jet is communicated with clean water basin simultaneously, with oxygen supply system connectivity while of oxygen enrichment reclaiming system.The vapour outlet of heat exchange system connects steam utilization equipment 15.Another outlet of gas solid separation connects solid salt collecting device 14.
Overcritical water oxidization reactor comprises cylindrical shell 17, burner 22, evaporation wall 23; Inner barrel arranges evaporation wall with one heart, the narrow gap 19 closed of the multistage annular along cylindrical shell axial distribution is formed between evaporation wall and cylindrical shell, each described narrow gap has water inlet 18 on cylindrical shell, the liquid passed into via water inlet can be infiltrated by described evaporation wall, forms moisture film at evaporation wall internal surface; Burner stretches into from cylindrical shell top, and the burner of described burner is positioned at cylindrical shell, and cylindrical shell top is shaped with sewage inlet and oxygen intake 20, and burner is shaped with fuel inlet and oxygen intake 21, and cylinder body bottom is shaped with liquid outlet 24.Evaporation wall is made of porous materials.Liquid is subcritical water.
The principle of work of overcritical water oxidization reactor is: in cylindrical shell, arrange the evaporation wall that porous material makes, the narrow gap space of multiple sealing is formed between cylindrical shell and evaporation wall, seal in narrow gap space is subcritical water, subcritical water is under the effect of pressure reduction, flow into evaporation wall internal surface, form the uniform moisture film of a layer thickness thereon, the inorganic salt produced in supercritical reaction process are dissolved, prevent the fouling of inorganic salt on inwall, prevent corrosives to contact with inner tube wall thus the corrosion caused simultaneously.Reacting fluid after desalination flows out from bottom, improves the security of device, and the use of evaporation wall reduces the selection difficulty to reactor cylinder material.This reactor lower end cover exit is designed to the conical flow guiding bottom surface structure of large chamfering, reaction after product washing away orlop evaporation wall can be reduced so to greatest extent, effectively can be avoided evaporating the blocking of wall, and reduce the corrosion of subcritical water to lower floor's evaporation wall.When evaporation wall is broken or block, without the need to changing all evapn wall, the evaporation wall only need changing damage can use.
The principle of work of Novel oil refining wastewater comprehensive treatment system of the present invention is:
In the present embodiment, design influent COD is 85900mg/L, PH is 10.78;
(1) homogeneous: namely oily(waste)water enters equalizing tank, carries out that homogeneous is all measured, pH value regulates;
(2) oil removal-dissolved air flotation: adopt the second medicine system to add the medicament such as PAC coagulating agent, PAM flocculation agent in oil removal-air flotation pool, make air flotation effect better, different with the density of oil according to water, aeration is utilized the part that can float in oily(waste)water to be separated, remove most of scum silica frost, the scum silica frost produced is by the collection and treatment of scum silica frost collecting device, and the waste water after scumming enters intermediate regulations pond.
(3) supercritical water oxidation (SCWO): the oily(waste)water namely after dissolved air flotation enters supercritical water oxidation (SCWO) reactor by intermediate regulations pond, simultaneously oxygen supply system prepare oxygen, starting fluid equipment fuel enter overcritical water oxidization reactor respectively and carry out oxidizing reaction, operating pressure is at 25-28MPa, working temperature, at 400-500 DEG C, generates supercutical fluid and inorganic salt.
(4) gas solid separation: be separated by cyclonic separator with inorganic salt at the reacted supercutical fluid of overcritical water oxidization reactor internal oxidition, inorganic salt remove in solid form to be collected by solid salt collecting device.
(5) heat energy utilization: after the supercutical fluid after desalination enters heat exchange system multi-stage heat exchanger, its temperature reduces to 100 ~ 200 DEG C, pressure reduces to 22 ~ 35MPa, and thermal power transfer is that steam enters steam utilization equipment and carries out generating electricity or heating etc.
(6) gas-liquid separation: Separate System of Water-jet passes through back pressure valve control pressure to 5 ~ 10MPa, gas phase and liquid phase separation are carried out to the product of heat exchange system, gas fraction is carbonic acid gas and unnecessary oxygen, liquid portion is water, the clear water that gas-liquid separation obtains directly enters clean water basin and is utilized, and gas fraction enters oxygen enrichment reclaiming system.
(7) pressure energy reclaims: the gas fraction that step (6) produces enters into pressure energy recovery system, and relief pressure also enters oxygen enrichment reclaiming system after output kinetic energy.
(8) oxygen enrichment reuse: the gas after gas-liquid separation contains carbon dioxide and oxygen, unnecessary oxygen can directly be recycled in the present system.
Claims (7)
1. a Novel oil refining wastewater comprehensive treatment system, it is characterized in that: comprise pretreatment unit, sewage enrichment unit, supercritical water oxidation unit, described sewage enrichment unit comprises the oil removal--air flotation pool and intermediate regulations pond that are communicated with successively, the entrance of described oil removal-air flotation pool connects the outlet of described pretreatment unit, and the pure water outlet in described intermediate regulations pond connects clean water basin, described supercritical water oxidation unit comprises oxygen supply system, starting fluid system, overcritical water oxidization reactor, gas solid separation system, Separate System of Water-jet, wherein, overcritical water oxidization reactor, gas solid separation system, Separate System of Water-jet connects successively, the fuel inlet of overcritical water oxidization reactor connects described starting fluid system, the oxygen intake of overcritical water oxidization reactor connects described oxygen supply system, the sewage inlet of described overcritical water oxidization reactor connects the dense water out in described intermediate regulations pond, the outlet of described Separate System of Water-jet connects described clean water basin.
2. a kind of Novel oil refining wastewater comprehensive treatment system according to claim 1, it is characterized in that: the sewage inlet of described overcritical water oxidization reactor connects the dense water out in described intermediate regulations pond by a membrane concentration assembly, described membrane concentration assembly comprises the film filter of one or more series connection.
3. a kind of Novel oil refining wastewater comprehensive treatment system according to claim 1, is characterized in that: described overcritical water oxidization reactor comprises cylindrical shell, burner, evaporation wall; Described inner barrel arranges evaporation wall with one heart, the narrow gap closed of the multistage annular along cylindrical shell axial distribution is formed between described evaporation wall and cylindrical shell, each described narrow gap has water inlet on cylindrical shell, the liquid passed into via water inlet can be infiltrated by described evaporation wall, forms moisture film at evaporation wall internal surface; Burner stretches into from cylindrical shell top, and the burner of described burner is positioned at cylindrical shell, and cylindrical shell top is shaped with sewage inlet and oxygen intake, and burner is shaped with fuel inlet and oxygen intake, and cylinder body bottom is shaped with liquid outlet.
4. a kind of Novel oil refining wastewater comprehensive treatment system according to claim 3, is characterized in that: described evaporation wall is made of porous materials.
5. according to a kind of Novel oil refining wastewater comprehensive treatment system one of claim 1-4 Suo Shu, it is characterized in that: another outlet of described gas solid separation connects solid salt collecting device.
6. according to a kind of Novel oil refining wastewater comprehensive treatment system one of claim 1-4 Suo Shu, it is characterized in that: arrange heat exchange system between described gas solid separation system and Separate System of Water-jet, the vapour outlet of described heat exchange system connects steam utilization equipment.
7. according to a kind of Novel oil refining wastewater comprehensive treatment system one of claim 1-4 Suo Shu, it is characterized in that: pneumatic outlet Bonding pressure energy recovery system, oxygen enrichment reclaiming system and the described oxygen supply system successively of described Separate System of Water-jet.
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| CN201520164188.3U CN204490674U (en) | 2015-03-23 | 2015-03-23 | A kind of Novel oil refining wastewater comprehensive treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773891A (en) * | 2015-03-23 | 2015-07-15 | 王冰 | Novel oil-refining wastewater comprehensive processing system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773891A (en) * | 2015-03-23 | 2015-07-15 | 王冰 | Novel oil-refining wastewater comprehensive processing system and method |
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Granted publication date: 20150722 |