CN208250073U - The processing unit of oily wastewater - Google Patents
The processing unit of oily wastewater Download PDFInfo
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- CN208250073U CN208250073U CN201721730300.0U CN201721730300U CN208250073U CN 208250073 U CN208250073 U CN 208250073U CN 201721730300 U CN201721730300 U CN 201721730300U CN 208250073 U CN208250073 U CN 208250073U
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Abstract
The utility model provides a kind of processing unit of oily wastewater.The processing unit includes ceramic membrane separation device and stripper plant, and ceramic membrane separation device is used to carry out ceramic membrane separation to oily wastewater to obtain oily phase and water phase；Stripper plant is connected with ceramic membrane separation device, for carrying out stripping processing to water phase.In this way, can carry out grease pre-separation to oily wastewater using ceramic membrane separation device, and the separating effect of ceramic membrane separation device is preferable, the moisture content itself in oily phase separated is lower, and the oil content in water phase is relatively low.After ceramic membrane separation device is handled, obtained water phase enters after stripper plant carries out stripping processing, can be further separated out the COD carried in water phase and come.In short, can more effectively separate oil, COD and the water in oily wastewater using above-mentioned processing unit.
Description
Technical field
The utility model relates to technical field of sewage, in particular to a kind of processing unit of oily wastewater.
Background technique
Oily wastewater oil content caused by coal to olefin project methanol-to-olefins device is big, and COD content is high, if the stock
Water cannot be effectively addressed, by the serious development for restricting coal-to-olefin.The part oily wastewater mainly includes methanol-to-olefins
The oil extraction of grease, settling tank, the oil water mixture of underground sewage tank, part oil-containing condensed water and the alkene of reaction member gasoline slot
Separative unit product gas compresses two or three sections of lime sets.90% the above are water in oily wastewater, remaining is oils and solubility COD, leads
It to be 100 many kinds of substance such as multi-methyl benzene, long chain alkane, long-chain olefin, alcohols, ethers.
Domestic conventional processing mode is that simply the oily wastewater is stored in two storage tanks of a constant volume at present,
One storage tank adds demulsifier to carry out stratification point oil, another storage tank then receives oily wastewater, alternately.However, the party
Method can only simply carry out preliminary water-oil separating, waste water of the lower layer containing a small amount of oil and a large amount of COD after oily wastewater stratification
It then directly arranges to sewage treatment unit, the oil (a small amount of water of oil-containing) on upper layer then sell outside by entrucking.Due to settle and separate can not completely by
Oil, which separates out to come and go, removes or reduces COD, whom this is directly partially separated and is arranged to sewage treatment unit progress sewage treatment, difficulty
It is larger, often impact is brought to sewage disposal system.Meanwhile the oil separated using stratification sell outside entrucking
When, it must be carried out dehydrating again after entrucking, and there are biggish security risks for dehydration.In short, this part contains at present
Oily water brings biggish threat to coal-to-olefin enterprise security long period oepration at full load, therefore effectively handles this part
Oily wastewater is particularly important to coal-to-olefin enterprise.
Utility model content
The main purpose of the utility model is to provide a kind of processing units of oily wastewater, in the prior art to solve
The problem of the produced oily waste water treatment effect difference of methanol-to-olefins device.
To achieve the goals above, one aspect according to the present utility model provides a kind of processing dress of oily wastewater
It sets comprising: ceramic membrane separation device, for carrying out ceramic membrane separation to oily wastewater to obtain oily phase and water phase；Stripping dress
It sets, is connected with ceramic membrane separation device, for carrying out stripping processing to water phase.
Further, ceramic membrane separation device includes one or more ceramic membrane separation units, each ceramic membrane separation unit
It is provided with the oily wastewater import for being passed through oily wastewater, and each ceramic membrane separation unit is connected with stripper plant.
Further, ceramic membrane separation unit includes: primary ceramic membrane component, is provided with oily wastewater import, concentration phase
Outlet and the first water outlet；Second level ceramic film component is provided with concentration phase import, the second water outlet and mutually exports with oil, phase is concentrated
Outlet is connected with concentration phase import, and oil is mutually exported for oily phase to be discharged；Wherein, the first water outlet and the second water outlet with stripping
Device is connected.
Further, processing unit further includes surge tank, and surge tank is provided with pre-separation oil mutually outlet and pre-separation water phase
Outlet, the outlet of pre-separation water phase are connected with oily wastewater import, and surge tank is used to carry out grease pre-separation to oily wastewater.
Further, pre-separation water phase outlet is connected with oily wastewater import by the first transfer pipeline, the first delivery pipe
Road is provided with the first delivery pump.
Further, processing unit further includes oily phase pans, and oily phase pans pass through the second delivery pipe with oily mutually outlet
Road is connected.
Further, oily mutually conveying branch, oil mutually conveying branch and oily wastewater import are provided on the second transfer pipeline
It is connected.
Further, stripper plant includes: stripper, is provided with stripper import, tower top outlet and tower bottom outlet, stripping
Tower import is connected with ceramic membrane separation device, and tower bottom is exported for the purified water of oily wastewater after processing to be discharged；Overhead condensation
Device is connected with tower top outlet, for condensing to the gas phase that tower top outlet is discharged.
Further, the top of stripper is also provided with refluxing opening, overhead condenser be additionally provided with fixed gas outlet and
Condensate outlet, fixed gas export the fixed gas for being discharged in condensation process, and condensate outlet is connected with refluxing opening, and condense
Condensate discharge branch is additionally provided on the pipeline that liquid outlet is connected with refluxing opening.
Further, stripper plant further includes return tank, and the pipe that condensate outlet is connected with refluxing opening is arranged in return tank
On the road, and the upstream of condensate discharge branch is arranged in return tank.
Further, stripper plant further includes tower bottom reboiler, and the import of tower bottom reboiler is connected with tower bottom outlet, is used for
A part in purified water is heated and is back in stripper.
Further, stripper plant further includes water phase pans, and water phase pans are arranged in stripper import and ceramic membrane
On the connected pipeline of separator.
Further, purified water discharge branch is additionally provided on the pipeline that the import of tower bottom reboiler is connected with tower bottom outlet
Road, stripper plant further include heat exchanger, heat exchanger be provided with thermal medium inlet, thermal medium outlet corresponding with thermal medium inlet,
Material inlet to be heated, heated material outlet corresponding with material inlet to be heated, wherein thermal medium inlet and purified water discharge
Branch is connected, and material inlet to be heated is connected with the outlet of water phase pans, and heated material outlet is connected with stripper import.
Using the technical solution of the utility model, a kind of processing unit of oily wastewater is provided comprising ceramic membrane point
From device and stripper plant, ceramic membrane separation device is used to carry out ceramic membrane separation to oily wastewater to obtain oily phase and water phase；
Stripper plant is connected with ceramic membrane separation device, for carrying out stripping processing to water phase.
In this way, grease pre-separation, and ceramic membrane separation device can be carried out to oily wastewater using ceramic membrane separation device
Separating effect it is preferable, the moisture content itself in oily phase separated is lower, and the oil content in water phase is relatively low.Through
After ceramic membrane separation device processing, obtained water phase enters after stripper plant carries out stripping processing, can will carry in water phase
COD, which is further separated out, to be come.In short, can more effectively be separated using above-mentioned processing unit the oil in oily wastewater, COD and
Water.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 is shown according to a kind of processing unit schematic diagram of the oily wastewater of embodiment of the utility model.
Wherein, the above drawings include the following reference numerals:
10, ceramic membrane separation device；11, ceramic membrane separation unit；101, primary ceramic membrane component；102, second level ceramic membrane
Component；20, stripper plant；21, stripper；22, overhead condenser；23, return tank；24, tower bottom reboiler；25, among water phase
Tank；26, heat exchanger；201, third delivery pump；202, the 4th delivery pump；203, the 5th delivery pump；30, surge tank；31, first is defeated
Send pipeline；301, the first delivery pump；302, the second delivery pump；40, oily phase pans；41, the second transfer pipeline；50, oil storage tank.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As described in background technology part, the produced oily waste water treatment effect of methanol-to-olefins device in the prior art
Fruit is poor.
In order to solve this problem, the utility model provides a kind of processing unit of oily wastewater, as shown in Figure 1, its
Including ceramic membrane separation device 10 and stripper plant 20, ceramic membrane separation device 10 is used to carry out ceramic membrane separation to oily wastewater
To obtain oily phase and water phase；Stripper plant 20 is connected with ceramic membrane separation device 10, for carrying out stripping processing to water phase.
In this way, grease pre-separation can be carried out to oily wastewater using ceramic membrane separation device 10, and ceramic membrane separation fills
Set 10 separating effect it is preferable, the moisture content itself in oily phase separated is lower, and the oil content in water phase is also relatively
It is low.After the processing of ceramic membrane separation device 10, obtained water phase enters after stripper plant 20 carries out stripping processing, can be by water phase
The COD of middle carrying, which is further separated out, to be come.In short, can more effectively be separated in oily wastewater using above-mentioned processing unit
Oil, COD and water.
In a kind of preferred embodiment, ceramic membrane separation device 10 includes one or more ceramic membrane separation units 11,
Each ceramic membrane separation unit 11 is provided with the oily wastewater import for being passed through oily wastewater, and each ceramic membrane separation unit 11
It is connected with stripper plant 20.When oily waste water treatment amount is big, can be arranged in parallel using multiple ceramic membrane separation units 11
Mode carry out Combined Treatment, can be further improved the treatment effeciency of oily wastewater in this way.Certainly, ceramic membrane separation unit 11
How much quantity can be increased and decreased actual conditions as needed.
Preferably, ceramic membrane separation device 10 is inorganic ceramic film filter.In the actual production process, inorganic ceramic
Film is after prolonged operation, because the pollution of film surface may result in variations of flux, filter capacity decline, need to film surface into
Row regeneration treatment makes membrane flux be restored, filter capacity reaches initial state.Regeneration can be chemical cleaning: use
4% concentration lye cleans 2 hours at a temperature of 80 DEG C or so, when that can not restore membrane flux using caustic dip liquid, needs to use
2% or so nitric acid room temperature cleans 1 hour or so, restores membrane flux.
In a kind of preferred embodiment, ceramic membrane separation unit 11 includes primary ceramic membrane component 101 and second level ceramics
Membrane module 102, primary ceramic membrane component 101 are provided with oily wastewater import, concentration mutually outlet and the first water outlet；Second level ceramics
Membrane module 102 is provided with concentration phase import, the second water outlet and mutually exports with oil, and mutually outlet is connected with concentration phase import for concentration, oil
Mutually outlet is for being discharged oily phase；Wherein, the first water outlet and the second water outlet are connected with stripper plant 20.In this way, each
It is arranged in series two ceramic film components in a ceramic membrane separation unit 11, can also further increase the grease point of oily wastewater
From effect.
Preferably, as shown in Figure 1, the ceramic membrane separation device 10 in above-mentioned processing unit is using the " wrong of two and two string datas
Stream " filter type.
In a kind of preferred embodiment, processing unit further includes surge tank 30, and surge tank 30 is provided with pre-separation oil phase
Outlet and the outlet of pre-separation water phase, the outlet of pre-separation water phase are connected with oily wastewater import, and surge tank 30 is used for oily wastewater
Carry out grease pre-separation.Oily wastewater can be carried out to preliminary buffering oil removal in surge tank 30 in advance in this way, thus further
Improve oil-water separation.
It in the actual operation process, can be by the oil extraction of the grease, settling tank of methanol to olefins reaction unit gasoline slot, ground
Oil water mixture, part oil-containing condensed water and the separation of olefins unit product air pressure of lower Water Tank are contracted total five strands of two or three sections of lime sets
Oily wastewater, which is sent into surge tank 30, carries out preliminary buffering oil removal, then carries out ceramic membrane separation,
In a kind of preferred embodiment, the outlet of pre-separation water phase passes through 31 phase of the first transfer pipeline with oily wastewater import
Even, the first delivery pump 301 is provided on the first transfer pipeline.Pre-separation water phase can be exported and be arranged using the first delivery pump 301
Water phase out, which is steadily delivered in ceramic membrane separation device 10, carries out water-oil separating.
Preferably, as shown in Figure 1, when ceramic membrane separation device 10 includes multiple ceramic membrane separation units 11, each ceramics
It is connected between the oily wastewater import of film separation unit 11 and the first transfer pipeline 31 by branch line, and on each branch line
It is provided with the second delivery pump 302.
In a kind of preferred embodiment, processing unit further includes oily phase pans 40, and oily phase pans 40 mutually go out with oil
Mouth is connected by the second transfer pipeline 41.In this way, the oil of oily mutually outlet discharge can mutually be kept in oily phase pans 40.It is excellent
The pre-separation oil of surge tank 30 is mutually exported and is connected with the oil phase pans 40 by selection of land.
In a kind of preferred embodiment, oily mutually conveying branch, oil phase conveying branch are provided on the second transfer pipeline 41
It is connected with oily wastewater import.In this way, can mutually be conveyed in the oily phase that ceramic membrane separation device 10 is discharged branch by oily
A part is back in ceramic membrane separation device 10 and is further separated, this can be further improved the effect of water-oil separating.
On the other hand, the oil that this part returns can also mutually guarantee crossflow velocity.
In a kind of preferred embodiment, stripper plant 20 includes stripper 21 and overhead condenser 22, and stripper 21 is set
It is equipped with stripper import, tower top outlet and tower bottom outlet, stripper import to be connected with ceramic membrane separation device 10, tower bottom outlet is used
In the purified water of discharge oily wastewater after processing；Overhead condenser 22 is connected with tower top outlet, for tower top outlet to be discharged
Gas phase condensed.Ceramic membrane separation device 10 enters in stripper 21, after stripping is handled, COD and a small amount of oily impurity from
Enter overhead condenser 22 after tower top outlet discharge and carries out condensation process.COD and a small amount of oily impurity can be separated in this way.
In a kind of preferred embodiment, the top of stripper 21 is also provided with refluxing opening, and overhead condenser 22 is also set
Be equipped with fixed gas outlet and condensate outlet, fixed gas exports fixed gas for being discharged in condensation process, condensate outlet with
Refluxing opening is connected, and is additionally provided with condensate discharge branch on the pipeline that is connected with refluxing opening of condensate outlet.It can incite somebody to action in this way
Fixed gas (mainly including alcohol, keto-aldehyde and a small amount of alkene) discharge, and COD and a small amount of oil are more fully separated by reflux setting
Impurity.In actual application, fixed gas may return to methanol-to-olefins system and recycle, and condensate liquid (oil-containing, mainly
Multi-methyl benzene and long chain alkane) and oily phase pans 40 in oil enter oil storage tank 50 together after finally carry out selling outside entrucking.
Preferably, above-mentioned stripper 21 is blister form, has better treatment effect.
In a kind of preferred embodiment, stripper plant 20 further includes return tank 23, and the setting of return tank 23 goes out in condensate liquid
On the pipeline that mouth is connected with refluxing opening, and the upstream of condensate discharge branch is arranged in return tank 23.
In a kind of preferred embodiment, stripper plant 20 further includes tower bottom reboiler 24, the import of tower bottom reboiler 24
It is connected with tower bottom outlet, for heating and being back in stripper 21 by a part in purified water.In this way by boiling circulation again
Setting, can further increase Srteam Stripping effect.
In a kind of preferred embodiment, stripper plant 20 further includes water phase pans 25, and the setting of water phase pans 25 exists
On the pipeline that stripper import is connected with ceramic membrane separation device 10.
In a kind of preferred embodiment, it is additionally provided on the pipeline that the import of tower bottom reboiler 24 is connected with tower bottom outlet
Purified water discharges branch, and stripper plant 20 further includes heat exchanger 26, and heat exchanger 26 is provided with thermal medium inlet and thermal medium inlet
Corresponding thermal medium outlet, material inlet to be heated, heated material outlet corresponding with material inlet to be heated, wherein thermal medium
Import is connected with purified water discharge branch, and material inlet to be heated is connected with the outlet of water phase pans 25, and heated material goes out
Mouth is connected with stripper import.The higher purified water of temperature of tower bottom outlet discharge be can use in this way to ceramic membrane separation device
The water phase of 10 discharges is preheated, to improve the effective use of the energy, energy saving.
Preferably, third delivery pump 201 is provided on the pipeline where material inlet to be heated；Where thermal medium inlet
The 4th delivery pump 202 is provided on pipeline；The 5th delivery pump 203 is provided on pipeline where refluxing opening.
In actual application, oil-containing water overall target is COD:20000mg/L, and oil content is 5%~10%, flow
About 20t/h.Using in the utility model processing unit processing after, send outside to sewage treatment unit sewage index be COD≤
800mg/L, oil content≤5mg/L, treated, and this strand of water sewage treatment unit is able to carry out preferable processing.
It can be seen from the above description that the above embodiments of the utility model achieve the following technical effects:
1, the device can realize that oil, water in oily wastewater separate, and can substantially reduce the content of COD in sewage, improve
The biodegradability of sewage, while eliminating impact of this strand of water to sewage treatment unit；
2, the sewage treatment process separation product of the device can realize that oily phase, water phase efficiently separate, while can realize
Active principle recycles to greatest extent in sewage, improves the economic benefit of enterprise；
3, preferably, which uses inorganic ceramic membrane group " series-parallel " design cycle oily waste water produced to coal-to-olefin
It is separated, good separating effect, regenerative process is simple, and regeneration liquid measure is few and regenerated liquid can repeatedly circulating repetition utilize；
4, preferably, which uses bubble column tray type, can more effectively remove COD in sewage,
And it can more fully recycle active principle；
5, treated that oil no longer needs to during sell outside entrucking carry out second dehydration processing for the device, eliminates original place reason
Oil existing security risk in the process is sold outside mode；
6, the plant investment is small, low energy consumption, implements simple and easy, high degree of automation, is not necessarily to manual intervention, operation operation
Simply, maintenance cost is low；
7, the device is easily promoted and applied in coal to olefin project, and exploitativeness is strong.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (11)
1. a kind of processing unit of oily wastewater characterized by comprising
Ceramic membrane separation device (10), for carrying out ceramic membrane separation to the oily wastewater to obtain oily phase and water phase；
Stripper plant (20) is connected with the ceramic membrane separation device (10), for carrying out stripping processing to the water phase；It is described
Ceramic membrane separation device (10) includes one or more ceramic membrane separation units (11), and each ceramic membrane separation unit (11) is equal
Be provided with the oily wastewater import for being passed through the oily wastewater, and each ceramic membrane separation unit (11) with the vapour
It mentions device (20) to be connected, the ceramic membrane separation unit (11) includes:
Primary ceramic membrane component (101) is provided with the oily wastewater import, concentration mutually outlet and the first water outlet；Second level pottery
Porcelain membrane module (102) is provided with concentration phase import, the second water outlet and mutually exports with oil, the concentration mutually outlet and the concentration
Phase import is connected, and the oil is mutually exported for the oily phase to be discharged；
Wherein, first water outlet and second water outlet are connected with the stripper plant (20).
2. processing unit according to claim 1, which is characterized in that the processing unit further includes surge tank (30), institute
It states surge tank (30) and is provided with pre-separation oil mutually outlet and the outlet of pre-separation water phase, the pre-separation water phase outlet and the oil-containing
Wastewater inlet is connected, and the surge tank (30) is used to carry out grease pre-separation to the oily wastewater.
3. processing unit according to claim 2, which is characterized in that the pre-separation water phase outlet and the oily wastewater
Import is connected by the first transfer pipeline (31), and the first delivery pump (301) are provided on first transfer pipeline.
4. processing unit according to any one of claim 1 to 3, which is characterized in that the processing unit further includes oil
Phase pans (40), the oil phase pans (40) mutually export with the oil to be connected by the second transfer pipeline (41).
5. processing unit according to claim 4, which is characterized in that be provided with oily phase on second transfer pipeline (41)
Branch is conveyed, mutually conveying branch is connected the oil with the oily wastewater import.
6. processing unit according to any one of claim 1 to 3, which is characterized in that the stripper plant (20) includes:
Stripper (21) is provided with stripper import, tower top outlet and tower bottom outlet, the stripper import and the ceramic membrane
Separator (10) is connected, and the tower bottom outlet is for being discharged the purified water of the oily wastewater after processing；
Overhead condenser (22), is connected with the tower top outlet, and the gas phase for the tower top outlet to be discharged condenses.
7. processing unit according to claim 6, which is characterized in that the top of the stripper (21) is additionally provided with reflux
Mouthful, the overhead condenser (22) is additionally provided with fixed gas outlet and condensate outlet, and the fixed gas outlet is for being discharged
The fixed gas in condensation process is stated, the condensate outlet is connected with the refluxing opening, and the condensate outlet and described time
Condensate discharge branch is additionally provided on the connected pipeline of head piece.
8. processing unit according to claim 7, which is characterized in that the stripper plant (20) further includes return tank
(23), the return tank (23) is arranged on the pipeline that the condensate outlet is connected with the refluxing opening, and the return tank
(23) upstream of the condensate discharge branch is set.
9. processing unit according to claim 6, which is characterized in that the stripper plant (20) further includes tower bottom reboiler
(24), the import of the tower bottom reboiler (24) is connected with tower bottom outlet, for adding a part in the purified water
Heat is simultaneously back in the stripper (21).
10. processing unit according to claim 9, which is characterized in that the stripper plant (20) further includes among water phase
The pipe being connected in the stripper import with the ceramic membrane separation device (10) is arranged in tank (25), the water phase pans (25)
On the road.
11. processing unit according to claim 10, which is characterized in that the import of the tower bottom reboiler (24) with it is described
Purified water discharge branch is additionally provided on the connected pipeline in tower bottom outlet, the stripper plant (20) further includes heat exchanger (26),
The heat exchanger (26) be provided with thermal medium inlet, thermal medium outlet corresponding with the thermal medium inlet, material to be heated into
Mouthful, heated material outlet corresponding with the material inlet to be heated, wherein the thermal medium inlet and purified water discharge
Branch is connected, and the material inlet to be heated is connected with the outlet of the water phase pans (25), and the heated material outlet
It is connected with the stripper import.
Priority Applications (1)
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|---|---|---|---|
| CN201721730300.0U CN208250073U (en) | 2017-12-12 | 2017-12-12 | The processing unit of oily wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721730300.0U CN208250073U (en) | 2017-12-12 | 2017-12-12 | The processing unit of oily wastewater |
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| CN208250073U true CN208250073U (en) | 2018-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540331A (en) * | 2019-09-23 | 2019-12-06 | 南京蓝胜环保科技有限公司 | process method for removing oil and reducing COD (chemical oxygen demand) of wastewater by using hexamethyl silazane |
-
2017
- 2017-12-12 CN CN201721730300.0U patent/CN208250073U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540331A (en) * | 2019-09-23 | 2019-12-06 | 南京蓝胜环保科技有限公司 | process method for removing oil and reducing COD (chemical oxygen demand) of wastewater by using hexamethyl silazane |
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Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: Guoneng Baotou Coal Chemical Co.,Ltd. Patentee after: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: SHENHUA BAOTOU COAL CHEMICAL Co.,Ltd. Patentee before: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. |