CN219297320U - Treatment system for N-methyldiethanolamine-containing wastewater - Google Patents
Treatment system for N-methyldiethanolamine-containing wastewater Download PDFInfo
- Publication number
- CN219297320U CN219297320U CN202320154147.0U CN202320154147U CN219297320U CN 219297320 U CN219297320 U CN 219297320U CN 202320154147 U CN202320154147 U CN 202320154147U CN 219297320 U CN219297320 U CN 219297320U
- Authority
- CN
- China
- Prior art keywords
- methyldiethanolamine
- wastewater
- concentration
- line mixing
- water outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The utility model relates to the field of wastewater treatment, in particular to a treatment system for wastewater containing N-methyldiethanolamine. The utility model provides a treatment system of N-methyldiethanolamine-containing wastewater, which comprises a concentration device, an on-line mixing and reacting device, a filtering device and a purifying device which are sequentially connected through pipelines; and an organic acid feed inlet is arranged on a pipeline connecting the concentration device and the on-line mixing and reacting device. The treatment system can greatly reduce the content of N-methyldiethanolamine in the wastewater, and the purified wastewater can enter a downstream acid water stripping or production sewage or municipal sewage biochemical treatment device for conventional treatment.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to a treatment system for wastewater containing N-methyldiethanolamine.
Background
N-Methyldiethanolamine (MDEA) is a tertiary amine substance, is a common desulfurizing agent, and is widely applied to the fields of natural gas desulfurization, coal gasification desulfurization, refinery gas desulfurization and the like. MDEA has stable property, is extremely easy to dissolve in water, is not easy to be absorbed, is difficult to biodegrade, and has certain toxicity to microorganisms. MDEA wastewater has the characteristics of strong alkalinity, high Chemical Oxygen Demand (COD) content and the like, and is difficult to treat by adopting conventional wastewater treatment technologies such as an adsorption method, an oxidation method, a flocculation method, a biological method and the like.
The MDEA wastewater treatment technical scheme in the prior art mainly comprises a reinforced biodegradation technology, a high-grade oxidation technology and a combination of the two technologies.
The enhanced biodegradation technology is mostly an anaerobic biological treatment technology, and the technology not only needs long-term anaerobic microorganism domestication to realize the adaptation of the technology to the MDEA wastewater quality, but also has limited treatment efficiency and long treatment period, and is not suitable for large-scale development; the advanced oxidation technology is to utilize free radicals (such as hydroxyl free radical-OH) which are generated under different conditions and have strong oxidizing property and no selectivity to oxidatively degrade refractory organic matters in MDEA wastewater to small molecular organic matters or CO which are easy to biodegrade 2 And a water process. Common MDEA wastewater advanced oxidation treatment technologies include Fenton oxidation, ozone oxidation and UV/H 2 O 2 Etc., but the above methods all involve the administration of a pharmaceutical agentLarge amount, low oxidation efficiency and the like; advanced oxidation technology is also a common means of treating MDEA wastewater in combination with biology. The technology adopts an advanced oxidation technology as a pretreatment means to improve the biodegradability of MDEA wastewater, and mainly realizes the degradation of organic matters through a biodegradation unit, but the technology has the disadvantages of long process flow, inconvenient management and operation and complex operation.
To sum up, the prior art cannot treat the N-methyldiethanolamine wastewater with high efficiency to effectively reduce the N-methyldiethanolamine content in the wastewater.
Disclosure of Invention
Therefore, the utility model aims to overcome the defect that the prior art cannot treat the N-methyldiethanolamine wastewater efficiently to effectively reduce the content of the N-methyldiethanolamine in the wastewater, and further provides a treatment method and a treatment system for the wastewater containing the N-methyldiethanolamine.
The utility model provides a method for treating wastewater containing N-methyldiethanolamine, which comprises the following steps:
1) Concentrating the N-methyldiethanolamine-containing wastewater, mixing and reacting the concentrated N-methyldiethanolamine-containing wastewater with organic acid to obtain wastewater containing heat stable salt;
2) Filtering and purifying the waste water containing the heat stable salt to obtain purified waste water.
The solution of N-Methyldiethanolamine (MDEA) and the organic acid react under certain conditions to form ionic amine salts which cannot be removed from the solution of N-methyldiethanolamine by heating, known as Heat Stable Salts (HSS) (Heat Stable Salts, HSS) or heat stable amine salts (Heat Stable Amine Salts, HSAS). The thermal stable salt formation process is shown in formula (1) (taking monoacid as an example):
HX+MDEA＝MDEAH + X - (1)
in the formula (1), HX is an organic acid, MDEAH + X - Refers to heat stable salts, MDEAH + To tie down amine, X - Is a heat stable salt anion.
Preferably, the concentration of N-methyldiethanolamine in the N-methyldiethanolamine-containing wastewater is 5-25wt%, and the concentration of N-methyldiethanolamine in the concentrated wastewater is 30-50wt%.
Preferably, the temperature of the reaction in the step 1) is 40-130 ℃, and the pressure of the reaction is 0.05-0.15MPa;
preferably, the organic acid is at least one selected from formic acid, oxalic acid and acetic acid;
the adding amount of the organic acid in the concentrated wastewater is 1:0.5-1.0 according to the mol ratio of the organic acid to the N-methyldiethanolamine in the concentrated wastewater.
Preferably, the physical filtration is adopted for filtration, and the content of impurities with the granularity of more than or equal to 5 mu m in the filtered wastewater containing the heat stable salt is not more than 1.0wt%;
and purifying and removing the heat stable salt of the wastewater containing the heat stable salt by adopting ion exchange, wherein the content of the heat stable salt in the purified wastewater is less than 1.0wt%.
The physical filtration is performed by a filter having a microfiltration membrane with a filtration mesh size of 1-5 μm.
The ion exchange is performed through an ion exchange resin bed, and the ion exchange resin bed is an anion ion exchange resin bed.
The precise membrane filter can remove impurities in the wastewater containing N-methyldiethanolamine, protect ion exchange resin and prolong the service life of the ion exchange resin.
Preferably, the concentration step is performed by a distillation tower, and the concentration obtained in the concentration process generates purified water and the purified wastewater is recycled;
step 2) the method further comprises the step of mixing and reacting part of the wastewater containing the heat stable salt with the concentrated wastewater and the organic acid again before filtering the wastewater containing the heat stable salt.
The step of mixing and reacting part of the waste water containing the heat stable salt with the concentrated waste water again and the organic acid can promote the reaction of generating the heat stable salt to be more sufficient.
The utility model also provides a treatment system of the N-methyldiethanolamine-containing wastewater, which comprises a concentration device, an on-line mixing and reacting device, a filtering device and a purifying device which are sequentially connected through pipelines;
and an organic acid feed inlet is arranged on a pipeline connecting the concentration device and the on-line mixing and reacting device.
Preferably, the concentration device is a distillation column.
Preferably, the in-line mixing and reacting device is an in-line mixer.
Preferably, the filter device is a filter.
Preferably, the purification device is an ion exchange resin bed.
The purification device has a thermal steady state salt discharge outlet.
Optionally, the filtration membrane of the filter is a microfiltration membrane.
Alternatively, the microfiltration membrane has a filter mesh size of 1-5 μm.
The ion exchange resin can effectively remove various anions in the filtered wastewater containing the heat stable salt, and can remove the heat stable salt in the filtered wastewater containing the heat stable salt.
Preferably, the device also comprises a wastewater recovery device, wherein the water inlet of the wastewater recovery device is connected with the water outlet of the purification device.
Preferably, the concentration device is provided with a concentration purified water outlet, and the concentration purified water outlet is connected with a water outlet of the purification device.
Preferably, the on-line mixing and reacting device is provided with a first water outlet and a second water outlet, the first water outlet of the on-line mixing and reacting device is connected with the water inlet of the filtering device, and the second water outlet of the on-line mixing and reacting device is connected with the water inlet of the on-line mixing and reacting device.
The technical scheme of the utility model has the following advantages:
1. the utility model provides a treatment method of wastewater containing N-methyldiethanolamine, which comprises the following steps: 1) Concentrating the N-methyldiethanolamine-containing wastewater, and carrying out a mixing reaction on the concentrated wastewater and organic acid to obtain wastewater containing heat stable salt; 2) Filtering and purifying the waste water containing the heat stable salt to obtain purified waste water.
The characteristic that N-methyldiethanolamine reacts with organic acid to generate heat stable salt is utilized, the concentrated N-methyldiethanolamine-containing wastewater is mixed with the organic acid to react, so that the N-methyldiethanolamine is converted into the heat stable salt which is easy to remove, the mixing reaction efficiency is high, and the reaction speed is high; after the mixed reaction is finished, the content of N-methyldiethanolamine in the wastewater is greatly reduced through subsequent filtration and purification treatment, and the purified wastewater can enter a downstream acid water stripping or production sewage or municipal sewage biochemical treatment device for conventional treatment.
2. The utility model provides a treatment system of N-methyldiethanolamine-containing wastewater, which comprises a concentration device, an on-line mixing and reacting device, a filtering device and a purifying device which are sequentially connected through pipelines; and an organic acid feed inlet is arranged on a pipeline connecting the concentration device and the on-line mixing and reacting device.
The concentration device is used for concentrating the N-methyldiethanolamine-containing wastewater and discharging the concentrated N-methyldiethanolamine-containing wastewater into an online mixing and reacting device, the N-methyldiethanolamine and the organic acid are subjected to mixing reaction in the online mixing and reacting device to produce the easily removed heat stable salt, the wastewater containing reaction products is sequentially introduced into the filtering device and the purifying device to remove the heat stable salt generated by the mixing reaction, the N-methyldiethanolamine content in the N-methyldiethanolamine-containing wastewater is greatly reduced, and the purified wastewater can enter a downstream acid water stripping or production sewage or biochemical treatment device of municipal sewage for conventional treatment.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a system for treating N-methyldiethanolamine-containing wastewater in example 1 of the present utility model.
Reference numerals:
100-concentrating means; 101-concentrating to generate a purified water outlet; 200-an online mixing and reacting device; 201-an organic acid feed inlet; 202-a first water outlet; 203-a second water outlet; 300-a filtration device; 301-an impurity discharge port; 400-purifying device; 401-thermal steady state salt discharge port; 500-a wastewater recovery device.
Detailed Description
The following examples are provided for a better understanding of the present utility model and are not limited to the preferred embodiments described herein, but are not intended to limit the scope of the utility model, any product which is the same or similar to the present utility model, whether in light of the present teachings or in combination with other prior art features, falls within the scope of the present utility model.
The specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
Example 1
The embodiment provides a treatment system of N-methyldiethanolamine-containing wastewater, which comprises a concentration device 100, an on-line mixing and reacting device 200, a filtering device 300 and a purifying device 400 which are sequentially connected through pipelines; an organic acid feed port 201 is provided in a pipeline connecting the concentration device 100 and the on-line mixing and reaction device 200.
The concentration device 100 concentrates the N-methyldiethanolamine-containing wastewater and then discharges the concentrated N-methyldiethanolamine-containing wastewater into the on-line mixing and reacting device 200, the N-methyldiethanolamine and the organic acid are mixed and reacted in the on-line mixing and reacting device 200 to produce the easily removed heat stable salt, and the reaction products are sequentially introduced into the filtering device 300 and the purifying device 400 to remove impurities and the heat stable salt generated by the mixing reaction, so that the N-methyldiethanolamine-containing wastewater reaches the standard of subsequent discharge or use. In conclusion, the treatment system for the N-methyldiethanolamine-containing wastewater provided by the utility model can be used for efficiently treating the N-methyldiethanolamine in the N-methyldiethanolamine-containing wastewater and effectively reducing the content of the N-methyldiethanolamine in the wastewater.
In this embodiment, the concentrating device 100 is a distillation column. In other embodiments, the concentration device 100 may be other devices.
In this embodiment, the treatment system for wastewater containing N-methyldiethanolamine further includes a wastewater recovery device 500, wherein a water inlet of the wastewater recovery device 500 is connected with a water outlet of the purification device 400. The recovery device 500 recovers the N-methyldiethanolamine-containing wastewater treated by the purification device 400 and the purified water produced by concentration in the concentration process of the concentration device 100.
In this embodiment, the concentration device 100 further has a concentration purified water discharge port 101, and the concentration purified water discharge port 101 is connected to the water inlet of the wastewater recovery device 500. The concentration device 100 generates a concentrated clean water during concentration, and the concentrated clean water can be directly used and discharged through the concentrated clean water discharge port 101.
In this embodiment, the in-line mixing and reaction device 200 is an in-line mixer, and in other embodiments, the in-line mixing and reaction device 200 may be other devices.
In this embodiment, the filtering device 300 is a filter. The filtering membrane of the filtering device 300 is a microfiltration membrane. The filter mesh size of the microfiltration membrane is 1-5 μm, for example 1 μm, 2 μm, 3 μm or 5 μm. The filter device 300 may be other devices in other embodiments.
In this embodiment, the filtering apparatus 300 has an impurity discharging port 301, and the impurity discharging port 301 can discharge the filtered impurities, avoid clogging of the filtering apparatus 300, and protect the ion exchange resin bed.
In this embodiment, the purification apparatus 400 is an ion exchange resin bed. In other embodiments the filter device 400 may be other devices.
In this embodiment, the ion exchange resin can effectively remove various anions in the filtered wastewater containing the heat stable salt, and can remove the heat stable salt in the filtered wastewater containing the heat stable salt.
In this embodiment, the purification apparatus 400 has a heat stable salt discharge 401, and the heat stable salt discharge 401 can discharge filtered heat stable salt, so that the ion exchange resin bed is regenerated.
In this embodiment, the online mixing and reaction device 200 has a first water outlet 203 and a second water outlet 202, the first water outlet 203 of the online mixing and reaction device 200 is connected to the water inlet of the filtering device 300, and the second water outlet 202 of the online mixing and reaction device 200 is connected to the water inlet of the online mixing and reaction device 200.
The second water outlet 202 mixes and reacts the part of the waste water containing the heat stable salt with the concentrated waste water and the organic acid in the on-line mixing and reacting device 200 again, so that the reaction for generating the heat stable salt can be promoted to be more sufficient.
The following examples were conducted to determine the concentration of the heat stable amine salt using SHZH-T4.26.00.107.2004 "analytical method for heat stable salt content in amine solutions".
The ion exchange resin of the ion exchange resin beds used in examples 2-4 was Versalt-A/B, wherein the volume ratio of Versalt-A to Versalt-B was 1:1.
example 2
The embodiment provides a method for treating wastewater containing N-methyldiethanolamine, which adopts the treatment system for wastewater containing N-methyldiethanolamine provided in the embodiment 1, and comprises the following steps:
1) Distilling and concentrating 1000kg of N-methyldiethanolamine-containing wastewater with the concentration of 8wt% into concentrated wastewater with the concentration of 40wt% by a concentrating device 100, and discharging purified water generated by concentration in the concentrating process into a wastewater recycling device 500 through a purified water discharge port 101 for recycling; injecting 40.3kg of acetic acid into the online mixing and reacting device 200 through the organic acid feed inlet 201, and carrying out mixing reaction with concentrated wastewater at 50 ℃ and 0.1MPa to obtain wastewater containing heat stable salt;
2) Injecting the wastewater containing the heat stable salt obtained in the step 1 into a filtering device 300 for physical filtration (the physical filtration is carried out by a filter with a precise filtering membrane, the filtering mesh size of the precise filtering membrane is 5 mu m, and the content of impurities with the granularity of more than or equal to 5 mu m in the filtered wastewater containing the heat stable salt is 0.5 wt%); the filtrate after filtration was subjected to ion exchange purification by the purification apparatus 400 (the purification apparatus 400 was an ion exchange resin bed, and the content of heat stable salt in the purified wastewater was 0.05 wt%), to obtain purified wastewater, which was recovered by the recovery apparatus 500.
Example 3
The embodiment provides a method for treating wastewater containing N-methyldiethanolamine, which adopts the treatment system for wastewater containing N-methyldiethanolamine provided in the embodiment 1, and specifically comprises the following steps:
1) 1000kg of N-methyldiethanolamine-containing wastewater with the concentration of 12wt% is distilled and concentrated into concentrated wastewater with the concentration of 35wt% by a concentrating device 100, and the concentrated purified water generated in the concentrating process is discharged into a wastewater recycling device 500 through a concentrated purified water outlet 101 for recycling; 60.5kg of organic acid (the organic acid comprises 0kg of formic acid, 0kg of oxalic acid and 60.5kg of acetic acid) is injected into the online mixing and reacting device 200 through an organic acid feed port 201, and mixed with concentrated wastewater at 50 ℃ and 0.1MPa for reaction to obtain wastewater containing heat steady-state salt;
2) Injecting the wastewater containing the heat stable salt obtained in the step 1 into a filtering device 300 for physical filtration (the physical filtration is carried out by a filter with a precise filtering membrane, the filtering mesh size of the precise filtering membrane is 5 mu m, and the content of impurities with the granularity of more than or equal to 5 mu m in the filtered wastewater containing the heat stable salt is 0.8wt%); the filtrate after filtration was subjected to ion exchange purification by the purification apparatus 400 (the purification apparatus 400 was an ion exchange resin bed, and the content of heat stable salt in the purified wastewater was 0.05 wt%), to obtain purified wastewater, which was recovered by the recovery apparatus 500.
Example 4
The embodiment provides a method for treating wastewater containing N-methyldiethanolamine, which adopts the treatment system for wastewater containing N-methyldiethanolamine provided in the embodiment 1, and specifically comprises the following steps:
1. 1000kg of N-methyldiethanolamine-containing wastewater with the concentration of 20wt% is distilled and concentrated into concentrated wastewater with the concentration of 30wt% by a concentrating device 100, and the concentrated purified water generated in the concentrating process is discharged into a wastewater recycling device 500 through a concentrated purified water outlet 101 for recycling; 169.1kg of organic acid (46 kg of formic acid, 63kg of oxalic acid and 60kg of acetic acid are included in the organic acid) is injected into the online mixing and reacting device 200 through the organic acid feed inlet 201, and mixed reaction is carried out with the concentrated wastewater at 50 ℃ and 0.1MPa, so as to obtain wastewater containing heat steady-state salt;
2. the wastewater containing the heat stable salt obtained in the step 1 is injected into a filtering device 300 to perform physical filtration (the physical filtration is performed by a filter with a precise filtering membrane, the filtering mesh size of the precise filtering membrane is 5 μm, the content of impurities with the granularity of more than or equal to 5 μm in the filtered wastewater containing the heat stable salt is 0.6wt%) and the filtered filtrate is subjected to ion exchange purification by a purifying device 400 (the purifying device 400 is an ion exchange resin bed layer, the content of the heat stable salt in the purified wastewater is 0.05wt%) to obtain purified wastewater, and the purified wastewater is recovered by a recovering device 500.
Test case
The purified wastewater obtained in the purification apparatus 400 of examples 2 to 4 was subjected to N-methyldiethanolamine concentration test, and the results are shown in Table 1.
Determination of N-methyldiethanolamine concentration the determination was carried out using DB 44/T1122-2013N-methyldiethanolamine.
TABLE 1
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (9)
1. The treatment system of the N-methyldiethanolamine-containing wastewater is characterized by comprising a concentration device, an on-line mixing and reacting device, a filtering device and a purifying device which are sequentially connected through pipelines;
and an organic acid feed inlet is arranged on a pipeline connecting the concentration device and the on-line mixing and reacting device.
2. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, characterized in that the concentration means is a distillation column.
3. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, wherein the in-line mixing and reacting device is an in-line mixer.
4. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, wherein the filter means is a filter.
5. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, wherein the purification means is an ion-exchange resin bed.
6. The system for treating wastewater containing N-methyldiethanolamine according to claim 5, characterized in that the purification unit has a thermal steady-state salt discharge outlet.
7. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, further comprising a wastewater recovery device, wherein the water inlet of the wastewater recovery device is connected with the water outlet of the purification device.
8. The system for treating wastewater containing N-methyldiethanolamine according to claim 7, wherein the concentrating means further comprises a concentrate-produced clean water outlet connected to the water inlet of the wastewater recovery means.
9. The system for treating wastewater containing N-methyldiethanolamine according to claim 1, wherein the on-line mixing and reaction apparatus has a first water outlet and a second water outlet, the first water outlet of the on-line mixing and reaction apparatus is connected to the water inlet of the filtration apparatus, and the second water outlet of the on-line mixing and reaction apparatus is connected to the water inlet of the on-line mixing and reaction apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320154147.0U CN219297320U (en) | 2023-02-01 | 2023-02-01 | Treatment system for N-methyldiethanolamine-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320154147.0U CN219297320U (en) | 2023-02-01 | 2023-02-01 | Treatment system for N-methyldiethanolamine-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219297320U true CN219297320U (en) | 2023-07-04 |
Family
ID=86982612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320154147.0U Active CN219297320U (en) | 2023-02-01 | 2023-02-01 | Treatment system for N-methyldiethanolamine-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219297320U (en) |
-
2023
- 2023-02-01 CN CN202320154147.0U patent/CN219297320U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103288309B (en) | Coal gasification wastewater zero-emission treatment method, and application thereof | |
| CN203568944U (en) | Coking wastewater reuse treatment system | |
| CN104185610A (en) | Method of recovering oil or gas and treating the resulting produced water | |
| CN103922549B (en) | A kind of coal gasification waste water treatment and reuse method and device thereof | |
| CN102718363A (en) | Coking wastewater comprehensive treatment method and system thereof | |
| CN103833166B (en) | A kind of methyldiethanolamine (MDEA) process for treating industrial waste water | |
| JP3227863B2 (en) | Ultrapure water production method | |
| CN104803542A (en) | Integrated treatment and reuse technology of esterification wastewater | |
| CN205442755U (en) | A fragrant iron ion follows device that ring method handled organic waste water | |
| CN107935094B (en) | Treatment process device and method for resin adsorption regeneration high-concentration organic waste liquid | |
| CN219297320U (en) | Treatment system for N-methyldiethanolamine-containing wastewater | |
| JP2013119523A (en) | Method for producing cyclohexanone oxime, and method and system of effluent treatment | |
| CN110092711A (en) | A kind of formaldehyde separation method of butanol purifying technique | |
| CN110563223A (en) | process method for treating difficultly degraded COD (chemical oxygen demand) in produced water of high-sulfur-content gas field | |
| CN115974334A (en) | Method and system for treating wastewater containing N-methyldiethanolamine | |
| CN110963595A (en) | Coal chemical industry salt-containing wastewater treatment system and treatment method | |
| CN104150711A (en) | Process for treating refractory organic wastewater with combination of low-temperature plasma and biochemical | |
| CN113800720A (en) | Leachate treatment method and leachate treatment system | |
| CN116040826A (en) | Treatment method and treatment system for coal chemical industry mixed salt mother liquor | |
| JP3168757B2 (en) | Advanced treatment method and equipment for purified water | |
| CN112794472A (en) | Concentration system and concentration method for high-salinity wastewater | |
| CN105859035A (en) | Reclaimed water reuse and treatment process | |
| CN101891325A (en) | Method for treating recycled water by combining chemical oxidation method and double-membrane method | |
| CN220098794U (en) | Treatment system for wastewater containing methyl diethanolamine | |
| CN105271585A (en) | Method for processing wastewater generated in a process for preparing butadiene through oxidative dehydrogenation of industrial butylene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |