CN109592830A - A kind of processing system and its processing method of the waste water containing solvent - Google Patents
A kind of processing system and its processing method of the waste water containing solvent Download PDFInfo
- Publication number
- CN109592830A CN109592830A CN201811518623.2A CN201811518623A CN109592830A CN 109592830 A CN109592830 A CN 109592830A CN 201811518623 A CN201811518623 A CN 201811518623A CN 109592830 A CN109592830 A CN 109592830A
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- Prior art keywords
- stripping tower
- water
- waste water
- solvent
- processing system
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a kind of processing systems of waste water containing solvent, including rectifying column, stripping tower, heater, air blower and low temperature gas-liquid separator, stripping tower top is equipped with water inlet end and is connected with the water outlet of rectifying column lower part, stripping tower top is equipped with outlet side and is connected with the inlet end of low temperature gas-liquid separator, stripping tower lower part is equipped with inlet end and connect with air blower, stripping tower bottom is equipped with water outlet, heater is connected in the middle part of stripping tower and for heating stripping tower, low temperature gas-liquid separator lower part is equipped with water outlet and connect with the water inlet end of rectifying column, have the advantages that energy continuous treatment variety classes solvent the present invention also provides aforementioned processing system and production cost is low.
Description
Technical field
The present invention relates to the environment protection field of chemical production wastewater processing more particularly to a kind of processing systems of waste water containing solvent
And its processing method.
Background technique
In Chemical Manufacture, product is washed with water or solvent is a kind of common production technology.For the washing after washing
Waste water inevitably contains a large amount of solvents.Most of solvent can often be recycled using the method for rectifying, but still have the molten of residual volume
Agent is present in water body (as solvent strength one≤3000ppm) and is difficult to eliminate, especially with solvent similar in water Quan Rong or boiling point.
If untreated be directly entered biochemical system, capable of not only killing biochemical strain, (pyridine is higher than 10ppm biochemical bacteria and is difficult to deposit in such as water
It is living), and can enter in atmosphere with biochemical aeration, form secondary pollution, (bibliography: organic in the coking wastewaters such as He Miao
Vaporization characteristics environmental science under the conditions of object aeration stripping, 1,997 18 (05) 34-36) the serious existence that threaten enterprise, and
With sharp rising for solvent cost in recent years, reduce cost and have become inexorable trend, how to remove and recycle these residual solvents at
For the key of Business survival.
CN105000616A industrialization utilization is very successful, and it discloses a kind of wastewater treatment methods, but is only capable of interval
Property waste water of the processing containing pyridine, the also only a small amount of condensation of waste water by condensation process, most of all burning disposals, this is virtually
Increase production cost.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and it is not of the same race to provide a kind of energy continuous treatment
The processing system and its processing method of class solvent and the low waste water containing solvent of production cost.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of processing system of the waste water containing solvent, including rectifying column, stripping tower, heater, air blower and low temperature gas-liquid point
From device, the stripping tower top is equipped with water inlet end and is connected with the water outlet of rectifying column lower part, and the stripping tower top is equipped with
Outlet side is simultaneously connected with the inlet end of low temperature gas-liquid separator, and the stripping tower lower part is equipped with inlet end and connects with air blower
It connects, the stripping tower bottom is equipped with water outlet, and the heater is connected in the middle part of stripping tower and for heating stripping tower, described low
Wet liquid/gas separator lower part is equipped with water outlet and connect with the water inlet end of rectifying column.
As further improvement to above-mentioned technical proposal:
The processing system further includes solvent recovery tank, and the solvent recovery tank is connected with the outlet side of rectifier
It connects.
The processing system further includes multiple water pumps, wherein a water pump is connected to the water inlet end of stripping tower and going out for rectifying column
Between water end (W.E.).
The processing system further includes waste water tank, and the water outlet of the waste water tank and the water inlet end of rectifying column connect.
Water pump is connected between the water outlet of the waste water tank and the water inlet end of rectifying column.
The water outlet of the low temperature gas-liquid separator is connect with waste water tank.
The low temperature gas-liquid separator top is equipped with outlet side.
The inventive concept total as one, the present invention also provides a kind of processing systems of aforementioned waste water containing solvent to carry out solvent
The processing method of waste water, comprising the following steps: waste water is carried out to rectification process in rectifying column and removes a part of solvent, another portion
Divide residual solvent to enter stripping tower and carry out stripping processing, residual solvent a part is made to switch to gas by liquid phase under the action of heater
Then gas phase residual solvent is collected concentrate by low temperature gas-liquid separator by phase, liquid phase part enters in rectifying column to be recycled again
Processing, gas phase portion burning disposal, the liquid phase residual solvent in stripping tower export on demand from the water outlet of stripping tower bottom
It is further processed.
As further improvement to above-mentioned technical proposal:
In the stripping tower, the gas liquid ratio of air and waste water is 120~150 ︰ 1；The waste water enter stripping tower when
Temperature is 60~65 DEG C, and the heating temperature of heater is 90~95 DEG C in the middle part of the stripping tower.
The solvent be Ammonia, pyridine, pyrroles, MIBK, THF, furans, naphthalene, biphenyl, dimethylbenzene, toluene, ethylbenzene one kind
Or it is a variety of.
Compared with the prior art, the advantages of the present invention are as follows:
The processing system of the waste water containing solvent of the invention, it is recyclable that rectifying column carries out rectification process to high-content solvent waste water
A large amount of solvents, the remaining waste water containing residual solvent enter stripping tower from stripping tower top, heat at the middle part of stripping tower, air from
The blowing air down machine of stripping tower enters, and the waste water after stripping is on demand into biochemical system or other treatment process, stripping to stripping
The highly concentrated solvent on tower top and the mixture of a small amount of water enter low temperature gas-liquid separator refrigerated separation, are largely again introduced into rectifying
Tower rectifying recovery processing, and the gas of small part entrainment minute quantity solvent realizes industrial into RTO incinerator burning disposal
Continuous production.
The processing method of present invention waste water containing solvent, using stripping tower, by solvent concentrate, rectifying is recycled again, is solved
Since solvent strength is too low in rectifying later period water, solvent indivisible technical problem in rectifying column will be empty in stripping tower
Gas is passed through in waste water, changes the vapor liquid equilibrium that stripping tower internal solvent is established in water, to the maximum extent by the solvent in water phase
It is transferred in gas phase, by the solvent that low temperature gas-liquid separator deep cooling recycling stripping goes out, since the solvent that stripping goes out contains a small amount of water,
Therefore be collected into it is a certain amount of after need to return rectifying column and recycled separation.The air for the entrainment minute quantity solvent that stripping goes out uses
RTO incinerator burning disposal.Processing method of the invention fundamentally eliminates the residual solvent in waste water, eliminates secondary dirt
Dye, and recycling design reduces production cost, the reuse especially suitable for high value solvent.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Each label indicates in figure:
1, waste water tank；2, water pump；3, rectifying column；4, solvent recovery tank；5, stripping tower；6, heater；7, air blower；8, low
Wet liquid/gas separator.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
As shown in Figure 1, a kind of processing system of waste water containing solvent of the invention, including rectifying column 3, stripping tower 5, heater
6, air blower 7 and low temperature gas-liquid separator 8,5 top of stripping tower are equipped with water inlet end and are connected with the water outlet of 3 lower part of rectifying column
It connects, 5 top of stripping tower is equipped with outlet side and is connected with the inlet end of low temperature gas-liquid separator 8, and 5 lower part of stripping tower is equipped with air inlet
It holds and is connect with air blower 7,5 bottom of stripping tower is equipped with water outlet, and heater 6 is connected to 5 middle part of stripping tower and blows for heating
De- tower 5,8 lower part of low temperature gas-liquid separator are equipped with water outlet and connect with the water inlet end of rectifying column 3.
In the present invention, rectifying column 3, which carries out rectification process to high-content solvent waste water, can be recycled a large amount of solvents, and residue is containing remnants
The waste water of solvent enters stripping tower 5 from 5 top of stripping tower, heats at the middle part of stripping tower 5, air is roused from the lower part of stripping tower 5
Blower 7 enters, and for the waste water after stripping on demand into biochemical system or other treatment process, stripping is highly concentrated to 5 top of stripping tower
The mixture of solvent and a small amount of water enters 8 refrigerated separation of low temperature gas-liquid separator, is largely again introduced into 3 rectifying of rectifying column recycling
Processing, realizes industrial continuous production.
Processing system further includes solvent recovery tank 4, and solvent recovery tank 4 is connected with the outlet side on 3 top of rectifying column.
Processing system further includes multiple water pumps 2, wherein a water pump 2 is connected to the water inlet end of stripping tower 5 and going out for rectifying column 3
Between water end (W.E.).There are two water pumps 2 for the present embodiment.
Processing system further includes waste water tank 1, and the water outlet of waste water tank 1 is connect with the water inlet end of rectifying column 3.
Water pump 2 is connected between the water outlet of waste water tank 1 and the water inlet end of rectifying column 3.
The water outlet of low temperature gas-liquid separator 8 is connect with waste water tank 1.
8 top of low temperature gas-liquid separator is equipped with outlet side.The gas that small part carries minute quantity solvent secretly passes through low temperature gas-liquid
The outlet side of separator 8 is into RTO incinerator burning disposal.
The processing method of a kind of waste water containing solvent of the invention, comprising the following steps: waste water is carried out to essence in rectifying column 3
It evaporates processing and removes a part of solvent, another part residual solvent enters stripping tower 5 and carries out stripping processing, in the effect of heater 6
Under so that residual solvent a part is switched to gas phase by liquid phase, then by gas phase residual solvent by low temperature gas-liquid separator 8 collection mention
Dense, liquid phase part enters in rectifying column 3 to be recycled again, gas phase portion burning disposal, and the liquid phase remnants in stripping tower 5 are molten
Agent is further processed on demand from the water outlet output of 5 bottom of stripping tower.
Waste water in waste water tank 1 is entered by water pump 2 to rectifying column 3,3 top of rectifying column is entered after most of rectification process
Solvent recovery tank 4 in recycling, another part enters 3 lower part water outlet of rectifying column and entered in stripping tower 5 by water pump 2, given up
Water drops to 5 middle part of stripping tower from 5 top of stripping tower, after being heated by heater 6, in the effect of 5 bottom blast machine 7 of stripping tower
Under, in a part of stripping to low temperature gas-liquid separator 8, another part is done on demand from the output of 5 bottom water outlet of stripping tower into one
Step processing；Waste water into low temperature gas-liquid separator 8 collects concentrate by condensation, and liquid phase part enters waste water tank 1 to carry out again
Recovery processing, gas phase portion burning disposal.
Embodiment 1:
Certain workshop waste water containing pyrroles, 108 ton/days of discharge amount, 19.8kg/T containing pyrroles.Before the laggard stripping tower 5 of waste water rectifying
Pyrrole concentrations 2968g/T.Waste water after rectifying is mentioned in stripping tower 5 with water pump 2, while entering after 7 inspiration air of air blower and blowing
De- tower 5 controls 60 DEG C of 5 inflow temperature of stripping tower, and 5 middle part heter temperature of stripping tower is 90 DEG C, and low temperature gas-liquid separator 8 is kept
At 0~5 DEG C.From the air containing pyrroles come out in stripping tower 5 after the separation of low temperature gas-liquid separator 8, gas enters RTO incinerator
Burn, coolant liquid be collected into it is a certain amount of return rectifying column 3, by air flow meter control into tower tolerance be 189L/S, fluid flow
For 4.54m3/ h makes gas liquid ratio 150:1, continuous operation.
Pyrroles's disposition in the waste water containing pyrroles per ton of table 1
Embodiment 2:
Certain workshop waste water containing MIBK, 145 ton/days of discharge amount, 11.34kg/T containing MIBK.Before the laggard stripping tower 5 of rectifying
MIBK concentration 1702g/T.It is mentioned in stripping tower 5 with waste water after pump handle rectifying, stripping tower 5 is entered after 7 inspiration air of air blower,
Controlling 5 inlet water temperature of stripping tower is 65 DEG C, and 5 middle part heter temperature of stripping tower is 95 DEG C, and low temperature gas-liquid separator 8 is maintained at 0
~5 DEG C, from the air containing MIBK come out in stripping tower 5, gas enters RTO incinerator and burns after low temperature gas-liquid separator 8 separates
Burn, coolant liquid be collected into it is a certain amount of after return rectifying column 3, being controlled by flowmeter into tower tolerance is 202L/S, and fluid flow is
6.06m3/ h makes 120 ︰ 1 of gas liquid ratio.Continuous operation.
MIBK disposition in the waste water containing MIBK per ton of table 2
In other embodiments, solvent be Ammonia, pyridine, THF, furans, naphthalene, biphenyl, dimethylbenzene, toluene, ethylbenzene one
Kind or a variety of obtain the same or similar technical effect.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (10)
1. a kind of processing system of waste water containing solvent, it is characterised in that: including rectifying column (3), stripping tower (5), heater (6),
Air blower (7) and low temperature gas-liquid separator (8), stripping tower (5) top be equipped with water inlet end and with rectifying column (3) lower part go out
Water end (W.E.) is connected, and stripping tower (5) top is equipped with outlet side and is connected with the inlet end of low temperature gas-liquid separator (8), institute
Stripping tower (5) lower part is stated equipped with inlet end and is connect with air blower (7), stripping tower (5) bottom is equipped with water outlet, described to add
Hot device (6) is connected in the middle part of stripping tower (5) and for heating stripping tower (5), and low temperature gas-liquid separator (8) lower part is equipped with
Water end (W.E.) is simultaneously connect with the water inlet end of rectifying column (3).
2. processing system according to claim 1, it is characterised in that: the processing system further includes solvent recovery tank (4),
The solvent recovery tank (4) is connected with the outlet side on rectifying column (3) top.
3. processing system according to claim 1 or 2, it is characterised in that: the processing system further includes multiple water pumps
(2), wherein a water pump (2) is connected between the water inlet end of stripping tower (5) and the water outlet of rectifying column (3).
4. processing system according to claim 3, it is characterised in that: the processing system further includes waste water tank (1), described
The water outlet of waste water tank (1) is connect with the water inlet end of rectifying column (3).
5. processing system according to claim 4, it is characterised in that: the water outlet and rectifying column (3) of the waste water tank (1)
Water inlet end between be connected with water pump (2).
6. processing system according to claim 4, it is characterised in that: the water outlet of the low temperature gas-liquid separator (8) with
Waste water tank (1) connection.
7. processing system according to claim 1 or 2, it is characterised in that: low temperature gas-liquid separator (8) top is equipped with
Outlet side.
8. a kind of processing for carrying out solvent waste water to the processing system of the waste water containing solvent described in any one of 7 according to claim 1
Method, it is characterised in that: the following steps are included: waste water is carried out to rectification process in rectifying column (3) removes a part of solvent, separately
A part of residual solvent enter stripping tower (5) carry out stripping processing, make under the action of heater (6) residual solvent a part by
Liquid phase switchs to gas phase, gas phase residual solvent is then collected concentrate by low temperature gas-liquid separator (8), liquid phase part enters rectifying
It is recycled in tower (3) again, gas phase portion burning disposal, the liquid phase residual solvent in stripping tower (5) is from stripping tower (5) bottom
The water outlet output in portion is further processed on demand.
9. processing method according to claim 8, it is characterised in that: in the stripping tower (5), the gas-liquid of air and waste water
Than for 120~150 ︰ 1；Temperature of the waste water when entering stripping tower (5) is 60~65 DEG C, is added in the middle part of the stripping tower (5)
The heating temperature of hot device (6) is 90~95 DEG C.
10. processing method according to claim 8, it is characterised in that: the solvent be Ammonia, pyridine, pyrroles, MIBK,
THF, furans, naphthalene, biphenyl, dimethylbenzene, toluene, ethylbenzene it is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518623.2A CN109592830A (en) | 2018-12-12 | 2018-12-12 | A kind of processing system and its processing method of the waste water containing solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518623.2A CN109592830A (en) | 2018-12-12 | 2018-12-12 | A kind of processing system and its processing method of the waste water containing solvent |
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| CN109592830A true CN109592830A (en) | 2019-04-09 |
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| CN201811518623.2A Pending CN109592830A (en) | 2018-12-12 | 2018-12-12 | A kind of processing system and its processing method of the waste water containing solvent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111003740A (en) * | 2019-11-29 | 2020-04-14 | 重庆聚狮新材料科技有限公司 | Method and apparatus for desalting by thin film desolventizing |
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| CN108569957A (en) * | 2018-05-04 | 2018-09-25 | 南京师范大学 | 2- naphthyl methyl ethers are extracted from beta naphthal, methanol, 2- naphthyl methyl ethers and p-methyl benzenesulfonic acid and recycle the device and method of component |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111003740A (en) * | 2019-11-29 | 2020-04-14 | 重庆聚狮新材料科技有限公司 | Method and apparatus for desalting by thin film desolventizing |
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Application publication date: 20190409 |