CN114702184A - High-salt high-organic-matter wastewater treatment device and method - Google Patents
High-salt high-organic-matter wastewater treatment device and method Download PDFInfo
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- CN114702184A CN114702184A CN202210366432.9A CN202210366432A CN114702184A CN 114702184 A CN114702184 A CN 114702184A CN 202210366432 A CN202210366432 A CN 202210366432A CN 114702184 A CN114702184 A CN 114702184A
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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
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The invention discloses a high-salinity high-organic-matter wastewater treatment device and method, and belongs to the technical field of wastewater treatment. The device includes: a water storage tank; a liquid inlet of the distillation kettle is connected with the water storage tank; a liquid inlet of the renewable adsorption tower is connected with a residual distillation liquid outlet of the distillation kettle; a liquid inlet of the reduced pressure rectifying tower is connected with a distillation liquid outlet of the distillation kettle, and the reduced pressure rectifying tower is connected with a water storage tank; the series multi-effect evaporator is formed by connecting 3 evaporators in series, and a liquid inlet of the series multi-effect evaporator is connected with a liquid outlet of the renewable adsorption tower; and the first material pool is connected with a discharge port of the series multi-effect evaporator. The invention also provides a method for treating the high-salt high-organic wastewater by using the device, the wastewater can reach the standard after the high-salt high-organic wastewater is subjected to distillation, rectification, adsorption and multiple-effect treatment, the subsequent biochemical treatment is not needed, and the resource recovery of the crystallized inorganic salt is realized.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a high-salinity high-organic-matter wastewater treatment device and method.
Background
The chemical industry uses some organic salts in the production process, such as: bromomethane triphenylphosphine, chloromethane triphenylphosphine, potassium tert-butoxide, sodium tert-butoxide, etc. The organic salts can bring chemical wastewater with high salt content (mass fraction is 5-20%) and high organic content (COD is 180000mg/L) after the reaction. The treatment of high-salinity high-organic wastewater usually adopts a dilution method to reduce the salt content of the wastewater, but the discharge of the wastewater after the salt concentration is reduced still causes environmental deterioration, and even causes salinization of soil and watershed. In addition, the organic matters in the wastewater often contain benzene ring organic matters and halogenated hydrocarbon organic matters, and the biological biodegradability of the organic matters is poor, so that the organic matters have high biological toxicity and great environmental safety hazards.
The traditional method for treating the high-salt high-organic-matter wastewater comprises the following steps: (1) the wastewater is treated by the traditional method after being diluted, the total discharge amount of the wastewater of enterprises is increased by the method, and the technologies such as Fenton oxidation, iron-carbon micro-electrolysis, catalytic oxidation and the like are carried out at the same time, and are limited by factors such as organic matters in the wastewater, method conditions, treatment cost and the like, so that the treated effluent still contains part of organic matters which are difficult to degrade, and the environment is also adversely affected in the later period. (2) The evaporation concentration desalination method has the advantages that the energy consumption required in the treatment is high, and the salt generated after concentration belongs to hazardous waste and is difficult to treat. For example, CN105461157A discloses a zero discharge method for high-salt and high-organic industrial wastewater, which adopts a submerged membrane bioreactor + nanofiltration + high-efficiency reverse osmosis + membrane distillation + evaporative crystallization to treat the high-salt and high-organic industrial wastewater. Although the method can be used for maximally recovering water resources while solving the problem of wastewater discharge and basically realizing zero discharge of high-salt high-organic matter industrial wastewater, nanofiltration concentrated water generated in the treatment process of the method is difficult to further treat, and nanofiltration membranes are easy to pollute and increase the input cost. (3) And (4) carrying out incineration treatment, namely carrying out incineration treatment on the high-salt high-organic matter wastewater by adopting an incinerator, removing organic matters in the wastewater, reducing the wastewater, and finally generating salt-containing hazardous waste. For example, CN201110227902.5 discloses a method for treating high-salt high-organic-content wastewater, which comprises extracting organic substances in wastewater with an extractant to separate phases, distilling and drying the aqueous phase obtained after the phase separation to obtain mixed salts, and incinerating the organic phase obtained after the phase separation. But the incineration tail gas becomes a difficult problem for a plurality of enterprises. The requirement of incineration for waste water is that the salinity is less than 10%, which is no longer applicable for higher salinity. If the salt is diluted to an appropriate range, the organic concentration tends to be too low to facilitate combustion. Even if the incineration requirement is met, the cost for treating the wastewater is still high. Moreover, aerosol can be generated in the incineration process, the difficulty is increased for subsequent tail gas treatment, and meanwhile, the aerosol can also cause the blockage of the waste heat boiler. The core of incineration treatment is to remove organic matters in water, the incineration process is used for preventing energy consumption, and on the other hand, a large amount of waste gas is generated, which runs counter to the goals of energy conservation and emission reduction. On one hand, the treatment technology does not reduce the discharge amount of pollutants in the environment, but increases the discharge amount, and on the other hand, the development of many chemical enterprises is greatly limited.
Although a method for treating industrial wastewater with high salt content and high organic matter content is disclosed, the method still has the problems of high equipment input cost or process running cost, insufficient removal of organic matters, ineffective utilization of inorganic salt resources and the like. Therefore, how to develop an effective method for treating industrial wastewater with high salt and high organic matter content can remove organic matter with complex components and difficult treatment, can realize effective utilization of inorganic salt resources, and has extremely high value.
Disclosure of Invention
The invention aims to provide a high-salinity high-organic-matter wastewater treatment device and a method, which can remove organic matters with complex components and difficult treatment and can realize effective utilization of inorganic salt resources.
In one aspect, the present invention relates to a high salinity and high organic matter wastewater treatment apparatus, comprising: a water storage tank; a liquid inlet of the distillation kettle is connected with the water storage tank; a liquid inlet of the renewable adsorption tower is connected with a residual distillation liquid outlet of the distillation kettle; a liquid inlet of the reduced pressure rectifying tower is connected with a distillate outlet of the distillation kettle, and the reduced pressure rectifying tower is connected with a water storage tank; the series multi-effect evaporator is formed by connecting 3 evaporators in series, and a liquid inlet of the series multi-effect evaporator is connected with a liquid outlet of the renewable adsorption tower; and the first material pool is connected with a discharge port of the series multi-effect evaporator.
Furthermore, in the high-salinity high-organic-matter wastewater treatment device provided by the invention, one side of the regenerable adsorption tower is provided with a regeneration activation device, and the regeneration activation device comprises a leaching tank, a leaching solution distillation kettle and a second material pool.
Furthermore, in the high-salinity high-organic-matter wastewater treatment device provided by the invention, the leaching tank is connected with the liquid inlet of the renewable adsorption tower; the liquid inlet of the leacheate distillation kettle is connected with the discharge port of the reproducible adsorption tower, and the liquid outlet of the leacheate distillation kettle is connected with the liquid inlet of the leacheate tank; the second material pool is connected with a discharge hole of the leacheate distillation kettle.
In another aspect, the present invention relates to a method for treating high-salinity high-organic wastewater, which comprises treating the high-salinity high-organic wastewater with the high-salinity high-organic wastewater treatment apparatus.
Further, in the method for treating the high-salinity high-organic-matter wastewater, the salt content of the high-salinity high-organic-matter wastewater is 5-20 wt%, and the COD concentration is 180000-320000 mg/L.
Further, the method for treating the high-salinity high-organic wastewater provided by the invention comprises the following steps: sending the high-salt high-organic wastewater from the water storage tank 1 into a distillation still 2 through a pipeline for distillation treatment, and sending the distilled volatile organic compounds into a reduced pressure distillation tower 4 through a pipeline for distillation recovery treatment; the residual distillation liquid in the distillation kettle 2 enters a regenerable adsorption tower 3 to remove residual organic matters in the wastewater, and the wastewater after adsorption treatment enters a series multi-effect evaporator 5 through an outlet of the regenerable adsorption tower 3 to be evaporated, crystallized and dewatered; recovering water evaporated by the series multi-effect evaporator 5, and collecting the inorganic salt subjected to crystallization treatment in the first material pool 6.
Further, the method for treating the high-salinity high-organic-matter wastewater provided by the invention further comprises regeneration and activation treatment, wherein the regeneration and activation treatment comprises the following steps: stopping feeding after the adsorption saturation of the regenerable adsorption tower 3, and performing regeneration activation treatment on the regenerable adsorption tower 3; slowly adding the leaching solvent in the leaching tank 7 into the renewable adsorption tower 3, leaching out the organic matters adsorbed in the renewable adsorption tower 3, allowing the leached leaching solution to enter a leaching solution distillation kettle 8 for distillation recovery treatment, and allowing the distillation residue obtained by the distillation recovery treatment to enter a second material pool 9 for treatment.
Further, in the method for treating the high-salinity high-organic-matter wastewater, the operating temperature of the distillation kettle is 50-90 ℃, and the operating pressure is 0.05-0.1 MPa; the operating temperature of the reduced pressure rectifying tower is 50-90 ℃, the operating pressure is 0.05-0.1 MPa, and the reflux ratio at the top of the tower is 0.2-5; the operating temperature of the eluent distillation kettle is 50-110 ℃, and the operating pressure is 0.05-0.1 MPa.
Further, in the method for treating the high-salinity high-organic-matter wastewater, the operating temperatures of 3 evaporators connected in series with a multi-effect evaporator from a liquid inlet to a liquid outlet are 85-95 ℃, 75-85 ℃ and 65-75 ℃ in sequence; the operating pressure of any evaporator is 0.05-0.5 MPa.
Further, in the method for treating high-salinity high-organic-matter wastewater, the leacheate in the leaching tank is any one or a mixture of more of water, dichloromethane, trichloromethane, carbon tetrachloride, methanol and ethanol, and the amount of the leacheate is 1-5 times of the effective volume of the regenerable adsorption tower.
The method comprises the steps of conveying high-salinity high-organic-matter wastewater to be treated into a distillation kettle from a water storage tank through a pipeline for distillation treatment, and conveying distilled volatile organic matters into a reduced pressure distillation tower through a pipeline for distillation recovery treatment; the residual distillation liquid in the distillation kettle enters a reproducible absorption tower to remove residual organic matters in the wastewater, and the wastewater after absorption treatment enters a series multi-effect evaporator through an outlet of the reproducible absorption tower to be evaporated, crystallized and dewatered; the evaporated water can reach the standard and be discharged, and the inorganic salt after the crystallization treatment flows into the material pool, so that the aim of recycling the high-salt high-organic wastewater is achieved. Therefore, the invention further claims the application of the method in the treatment of high-salt high-organic wastewater.
Compared with the prior art, the invention has the following beneficial effects or advantages:
the invention provides a high-salt high-organic-matter wastewater treatment device and a method, the device and the method separate volatile organic matters in high-salt high-organic-matter wastewater by distillation, the separated volatile organic matters enter a reduced pressure rectifying tower for rectification, and the rectified organic matters are recycled and reused; the residual distillation liquid in the distillation kettle enters an adsorption device, and a small amount of residual organic matter components in the residual distillation liquid are removed by adsorption; and (4) carrying out evaporation, crystallization and dehydration on the inorganic salt wastewater subjected to adsorption treatment by using a multi-effect evaporator. The device and the method realize harmless treatment of high-salt high-organic matter wastewater, the evaporated water reaches the discharge standard, and inorganic salt in the wastewater can be crystallized to obtain high-purity inorganic salt for resource recovery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-salinity and high-organic-matter wastewater treatment device provided by the invention, wherein 1 is a water storage tank, 2 is a distillation still, 3 is a renewable adsorption tower, 4 is a reduced pressure rectification tower, 5 is a series multi-effect evaporator, 6 is a first material tank, 7 is a leaching tank, 8 is a leaching liquor distillation still, and 9 is a second material tank.
Detailed Description
The following examples are given to illustrate the technical aspects of the present invention, but the present invention is not limited to the following examples.
Example 1
The embodiment provides a treatment and recovery process of high-salt high-organic wastewater.
As shown in fig. 1, the water storage tank 1 is filled with high-salt high-organic wastewater to be treated. The distillation kettle 2 is connected with a liquid inlet of the reduced pressure rectifying tower 4 through a distillation liquid outlet, and the reduced pressure rectifying tower 4 is used for rectifying volatile organic compounds. The decompression rectifying tower 4 and the water storage tank 1 form a loop, volatile organic matters rectified by the decompression rectifying tower 4 are recovered, and distillation residue liquid flows back to the water storage tank 1 to be treated. The distillation kettle 2 is connected with a liquid inlet of a reproducible adsorption tower 3 through a distillation residue liquid outlet, and the reproducible adsorption tower is used for adsorbing residual organic matters in the distillation residue liquid. The liquid outlet of the regenerable adsorption tower 3 is connected with the liquid inlet of the series multi-effect evaporator 5, and the series multi-effect evaporator 5 is used for distilling water in the wastewater. The series multi-effect evaporator 5 is composed of an evaporator 5-1, an evaporator 5-2 and an evaporator 5-3 which are connected in series. The discharge port of the multi-effect evaporator 5 is connected with a first material pool 6, and the first material pool 6 is used for recovering inorganic salt after evaporation and crystallization.
Illustratively, a regeneration activation device is further disposed on one side of the regenerable adsorption tower 3, and the adsorbent saturated in adsorption is subjected to leaching regeneration activation by using a leaching solution, so that regenerable recycle of the adsorption tower is realized. Specifically, the regeneration device comprises a leaching tank 7, a leaching solution distillation kettle 8 and a second material pool 9. The leaching tank 7 is connected with a liquid inlet of the reproducible adsorption tower 3; one side of a discharge hole of the regenerable adsorption tower 3 is connected with a liquid inlet of the distillation kettle; the liquid outlet of the eluent distillation kettle 8 is connected with the liquid inlet of the leaching tank 7; the discharge hole of the eluent distillation kettle 8 is connected with a second material pool 9.
In the embodiment, the content of inorganic salt in the high-salt high-organic-matter wastewater is 5 wt%, and the COD concentration is 180000 mg/L. Wherein the inorganic component is potassium bromide, and the organic component is triphenylphosphine oxide, triphenylphosphine, tetrahydrofuran and tert-butyl alcohol. In the organic components, the ratio of triphenylphosphine oxide to triphenylphosphine is 24%, the ratio of triphenylphosphine to triphenylphosphine is 14%, the ratio of tetrahydrofuran to tetrahydrofuran is 42%, and the ratio of tertiary butanol to tertiary butanol is 20%.
According to the device shown in figure 1, high-salt high-organic-matter wastewater to be treated is sent into a distillation still 2 from a water storage tank 1 through a pipeline for distillation treatment, and distilled volatile organic matters enter a reduced-pressure distillation tower 4 through a pipeline for rectification recovery treatment; the residual distillation liquid in the distillation kettle 2 enters a regenerable adsorption tower 3 to remove residual organic matters in the wastewater, and the wastewater after adsorption treatment enters a series multi-effect evaporator 5 through an outlet of the regenerable adsorption tower 3 to be evaporated, crystallized and dewatered; the evaporated water can reach the standard and be discharged, and the inorganic salt after crystallization treatment flows into the first material pool 6 for recycling. After the adsorbent in the regenerable adsorption tower 5 is adsorbed and saturated, stopping feeding, starting to perform regenerable adsorption tower 5 regeneration and activation treatment, slowly adding eluent in the leaching tank 7 into the regenerable adsorption tower 5, leaching out organic matters adsorbed in the adsorbent, and allowing the leached eluent to enter an eluent distillation kettle 8 for distillation and recovery treatment; and the residual distillation liquid enters a second material pool 9 to be treated.
Still 2 has the dimensions:
the effective volume is 500L, the operation temperature is 50-90 ℃, and the operation pressure is 0.05-0.1 MPa. The size of the vacuum rectification column 4 is as follows:
the effective volume is 200L, the operation temperature is 50-90 ℃, and the operation pressure is 0.05-0.1 MPa; the reflux ratio of the tower top is 0.2-5. The size of the leacheate distillation kettle 8 is as follows:
the effective volume is 500L, the operation temperature is 50-110 ℃, and the operation pressure is 0.05-0.1 MPa. The size of the spray washing tank 7 is as follows:
the effective volume is 300L, and methanol is filled in the leaching tank as a leaching solvent. The size of each evaporator of the series multi-effect evaporator is as follows:
the effective volume is 200L, and the operating temperature is respectively as follows: the operating temperature of the evaporator 5-1 is 85-95 ℃, the operating temperature of the evaporator 5-2 is 75-85 ℃, the operating temperature of the evaporator 5-3 is 65-75 ℃, and the operating pressure is 0.05-0.5 MPa.
The dimensions of the regenerable adsorption column 5 were:
the effective volume is 200L, 200L of polystyrene adsorption resin is filled in the adsorption tower for adsorbing residual organic matters, when the distilled liquid with 3 times of the effective volume of the reproducible adsorption tower is adsorbed, the adsorption tower is in an adsorption saturated state or a state close to the saturation state, and the reproducible activation operation is started; wherein the dosage of the leacheate is 1 time of the effective volume of the regenerable adsorption tower 3.
After treatment by the above method:
the COD concentration of the multi-effect distilled water is 32mg/L, the TDS concentration is 18mg/L, the content of volatile organic matters recovered by rectification is 99.2%, and the content of inorganic salt potassium bromide is 97.4%.
Example 2
This example provides a test of recovery from treatment of high salt high organic matter wastewater.
The high-salt and high-organic wastewater used in the example has a salt content of 10 wt% and a COD concentration of 240000 mg/L. Wherein the inorganic component is potassium chloride, and the organic component is triphenylphosphine oxide, triphenylphosphine, tetrahydrofuran and tert-butyl alcohol. The organic component contains 12% of triphenylphosphine oxide, 15% of triphenylphosphine, 46% of tetrahydrofuran and 27% of tertiary butanol.
The eluent in this example is a methanol solvent, and its usage amount is 3 times of the effective volume of the regenerable adsorption column 3.
After treatment by the above method:
the COD concentration of the multi-effect distilled water is 44mg/L, and the TDS concentration is 32 mg/L; the content of volatile organic matters recovered by rectification is 98.8%, and the content of inorganic salt potassium bromide is 98.2%.
Example 3
This example provides a test of recovery from treatment of high salt high organic matter wastewater.
The content of inorganic salts in the high-salt high-organic wastewater used in the example was 20 wt%, and the COD concentration was 320000 mg/L. Wherein the inorganic component is potassium bromide, and the organic component is triphenylphosphine oxide, triphenylphosphine, diphenyl phosphine oxide, tetrahydrofuran and tert-butyl alcohol. In the organic salt component, the ratio of triphenylphosphine oxide is 14%, the ratio of triphenylphosphine is 18%, the ratio of diphenylphosphine oxide is 8%, the ratio of tetrahydrofuran is 38%, and the ratio of tert-butyl alcohol is 22%.
The eluent in this example is a methanol solvent, and its usage amount is 5 times of the effective volume of the regenerable adsorption column 3.
After treatment by the above method:
the COD concentration of the multi-effect distilled water is 51mg/L, and the TDS concentration is 32 mg/L; the content of volatile organic matters recovered by rectification is 98.5%, and the content of inorganic salt potassium bromide is 95.7%.
As described above, the present invention can be preferably implemented, and the above-mentioned embodiments only describe the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes and modifications of the technical solution of the present invention made by those skilled in the art without departing from the design spirit of the present invention shall fall within the protection scope defined by the present invention.
Claims (10)
1. The utility model provides a high organic matter effluent treatment plant of high salt which characterized in that includes:
a water storage tank (1);
the liquid inlet of the distillation kettle (2) is connected with the water storage tank (1); a renewable adsorption tower (3), wherein a liquid inlet of the renewable adsorption tower is connected with a distillation residue liquid outlet of the distillation kettle (2); a liquid inlet of the reduced pressure rectifying tower (4) is connected with a distillate outlet of the distillation kettle (2), and the reduced pressure rectifying tower (4) is connected with the water storage tank (1);
the series multi-effect evaporator (5) is formed by connecting 3 evaporators in series, and a liquid inlet of the series multi-effect evaporator (5) is connected with a liquid outlet of the renewable adsorption tower (3);
and the first material pool (6) is connected with a discharge port of the series multi-effect evaporator (5).
2. The high-salinity high-organic-matter wastewater treatment device according to claim 1, characterized in that one side of the regenerable adsorption tower (3) is provided with a regeneration activation device, and the regeneration activation device comprises a leaching tank (7), a leaching solution distillation still (8) and a second material tank (9).
3. The high-salinity high-organic-matter wastewater treatment device according to claim 2, characterized in that the leaching tank (7) is connected with a liquid inlet of the regenerable adsorption tower (3);
a liquid inlet of the leacheate distillation kettle (8) is connected with a discharge hole of the renewable adsorption tower (3), and a liquid outlet of the leacheate distillation kettle is connected with a liquid inlet of the leacheate tank (7);
and the second material pool (9) is connected with a discharge hole of the leacheate distillation kettle (8).
4. A method for treating high-salinity high-organic-matter wastewater is characterized in that the high-salinity high-organic-matter wastewater is treated by the high-salinity high-organic-matter wastewater treatment device according to any one of claims 1 to 3; in the high-salt high-organic matter wastewater, the salt content is 5-20 wt%, and the COD concentration is 180000-320000 mg/L.
5. The method for treating high-salinity high-organic-matter wastewater according to claim 4, characterized by comprising the following steps: the high-salt high-organic-matter wastewater is sent into the distillation still (2) for distillation treatment through the water storage tank (1) through a pipeline, and the distilled volatile organic matters enter the reduced-pressure distillation tower (4) through a pipeline for rectification recovery treatment; residual distillation liquid in the distillation kettle (2) enters the renewable adsorption tower (3) to remove residual organic matters in the wastewater, and the wastewater after adsorption treatment enters the series multi-effect evaporator (5) through an outlet of the renewable adsorption tower (3) to be evaporated, crystallized and dewatered; and recovering water evaporated by the series multi-effect evaporator (5), and feeding inorganic salt subjected to crystallization treatment into the first material pool (6) for collection.
6. The method for treating high-salinity high-organic-matter wastewater according to claim 4, characterized by further comprising a regeneration activation treatment, wherein the regeneration activation treatment comprises: the feeding is stopped after the adsorption of the regenerable adsorption tower (3) is saturated, and the regenerable adsorption tower (3) is subjected to regeneration activation treatment; slowly adding the leaching solvent in the leaching tank (7) into the renewable adsorption tower (3), leaching out organic matters adsorbed in the renewable adsorption tower (3), feeding the leached leaching solution into the leaching solution distillation kettle (8) for distillation recovery treatment, and feeding the distillation residue obtained by the distillation recovery treatment into a second material pool (9) for treatment.
7. The method for treating the high-salt high-organic-matter wastewater according to claim 5, wherein the operating temperature of the distillation kettle (2) is 50-90 ℃, and the operating pressure is 0.05-0.1 MPa; the operating temperature of the reduced pressure rectifying tower (4) is 50-90 ℃, the operating pressure is 0.05-0.1 MPa, and the reflux ratio at the top of the tower is 0.2-5;
the operating temperature of the leacheate distillation kettle (8) is 50-110 ℃, and the operating pressure is 0.05-0.1 MPa.
8. The method for treating high-salinity high-organic-matter wastewater according to claim 5, characterized in that the 3 evaporators of the series multi-effect evaporator (5) are sequentially an evaporator (5-1), an evaporator (5-2) and an evaporator (5-3) from a liquid inlet to a liquid outlet; the operating temperature of the evaporator (5-1) is 85-95 ℃, the operating temperature of the evaporator (5-2) is 75-85 ℃, and the operating temperature of the evaporator (5-3) is 65-75 ℃; the operating pressure of any one of the evaporator (5-1), the evaporator (5-2) and the evaporator (5-3) is 0.05-0.5 MPa.
9. The method for treating high-salinity high-organic-matter wastewater according to claim 5, wherein the leacheate in the leaching tank (7) is any one or more of water, dichloromethane, trichloromethane, carbon tetrachloride, methanol and ethanol, and the amount of the leacheate is 1-5 times of the effective volume of the regenerable adsorption tower (3).
10. The method for treating high-salinity high-organic-matter wastewater according to any one of claims 4 to 9, which is applied to the treatment of high-salinity high-organic-matter wastewater.
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| CN112174244A (en) * | 2020-09-25 | 2021-01-05 | 西安瑞联新材料股份有限公司 | Device and method for treating medium-low concentration DMF (dimethyl formamide) wastewater |
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| JPH11226560A (en) * | 1998-02-13 | 1999-08-24 | Hitachi Ltd | Method and device for treating waste liquid or waste water |
| CN104355470A (en) * | 2014-10-11 | 2015-02-18 | 波鹰(厦门)科技有限公司 | Device for recovering glycerinum in high-salinity organic wastewater |
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