CN110877944A - Dichloromethane wastewater treatment method and treatment device - Google Patents
Dichloromethane wastewater treatment method and treatment device Download PDFInfo
- Publication number
- CN110877944A CN110877944A CN201911129228.XA CN201911129228A CN110877944A CN 110877944 A CN110877944 A CN 110877944A CN 201911129228 A CN201911129228 A CN 201911129228A CN 110877944 A CN110877944 A CN 110877944A
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- China
- Prior art keywords
- dichloromethane
- wastewater
- lime
- reaction vessel
- wastewater treatment
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 title claims abstract description 233
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 29
- 239000002351 wastewater Substances 0.000 claims abstract description 48
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 42
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 42
- 239000004571 lime Substances 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract description 10
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract description 5
- 235000019253 formic acid Nutrition 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Images
Classifications
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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
- C02F2101/36—Organic compounds containing halogen
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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)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a dichloromethane wastewater treatment method, which comprises the following steps: step one, receiving dichloromethane wastewater; adding lime into the dichloromethane wastewater until the dichloromethane wastewater has a set pH value; step three, heating the dichloromethane wastewater until the dichloromethane wastewater reaches a set temperature; the second step and the third step do not limit the sequence. Still relate to a dichloromethane effluent treatment plant, it includes: a reaction vessel; the lime dosing assembly comprises a lime adding channel, and the lime adding channel extends into the reaction container; a heating assembly disposed in the reaction vessel. A quantity of lime is added to the methylene chloride and heated to convert the methylene chloride to formic acid for biochemical processing. The invention adopts dichloromethane waste water to be added with lime for reaction at a certain temperature, thereby solving the problems of complex operation and higher requirement.
Description
Technical Field
The invention belongs to the field of wastewater treatment, relates to a dichloromethane wastewater treatment method, and further relates to a dichloromethane wastewater treatment device.
Background
At present, a pretreatment method of iron-carbon, Fenton oxidation and coagulating sedimentation is mostly adopted for dichloromethane wastewater, the main problems of the treatment process are that the process route is long, the operation is complex, firstly, the pH value of the wastewater is adjusted to 2-3 by sulfuric acid, then, the pH value is adjusted to 8-9 by liquid caustic soda, the acid and the caustic soda are adjusted back and forth by a system, the cost of the medicament is high, meanwhile, a large amount of salt is added by the system, the subsequent biochemical treatment is influenced, the proportional relation of the medicament is required to be well controlled in Fenton oxidation operation, and the operation requirement is high. The above problems need to be solved.
Disclosure of Invention
The invention aims to provide a dichloromethane wastewater treatment method which can simplify a wastewater treatment process.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a dichloromethane wastewater treatment method, which comprises the following steps:
step one, receiving dichloromethane wastewater;
adding lime into the dichloromethane wastewater until the dichloromethane wastewater has a set pH value;
step three, heating the dichloromethane wastewater until the dichloromethane wastewater reaches a set temperature;
the second step and the third step do not limit the sequence.
Optionally, it further comprises:
stirring the dichloromethane wastewater;
the step four is arranged before or after any step of the step one to the step three.
Optionally, the set pH value is 9-10.
Optionally, the set temperature is 40 ℃ to 60 ℃.
Optionally, it further comprises:
the contact time of the dichloromethane wastewater and the lime lasts for 2 to 3 hours.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the dichloromethane wastewater treatment method, the lime is added into the dichloromethane wastewater until the dichloromethane wastewater reaches the set pH value, and the dichloromethane wastewater is heated to reach the set temperature, so that the dichloromethane is converted into the formic acid convenient for biochemical treatment. Aiming at the background technology, the invention adopts the dichloromethane wastewater and the lime to react at a certain temperature, thereby solving the problems of complex operation and higher requirement.
Another object of the present invention is to provide a dichloromethane wastewater treatment apparatus, which can simplify the wastewater treatment process.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a dichloromethane waste water treatment device, which comprises:
a reaction vessel;
the lime dosing assembly comprises a lime adding channel, and the lime adding channel extends into the reaction container;
a heating assembly disposed in the reaction vessel.
Optionally, it further comprises:
a stirring assembly disposed in the reaction vessel.
Optionally, it further comprises:
a pH meter disposed in the reaction vessel.
Further, the pH meter is in signal connection with the lime dosing assembly.
Optionally, the heating assembly comprises a heating medium feeding channel, and an outlet of the heating medium feeding channel is arranged at the bottom of the reaction vessel.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the dichloromethane wastewater treatment device, the reaction container is arranged to load dichloromethane wastewater, the lime dosing device is arranged to add lime into the reaction container, and the heating assembly is arranged to heat the dichloromethane wastewater in the reaction container, so that dichloromethane is converted into formic acid convenient for biochemical treatment. Aiming at the background technology, the invention adopts the dichloromethane wastewater and the lime to react at a certain temperature, thereby solving the problems of complex operation and higher requirement.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of a dichloromethane wastewater treatment method of the present invention;
FIG. 2 is a schematic structural view of an embodiment of a dichloromethane wastewater treatment device according to the present invention;
wherein the reference numerals are as follows:
1. a reaction vessel;
2. lime dosing assembly;
3. a heating assembly;
4. a stirring assembly;
5. a pH meter;
6. a lime addition channel;
7. a heating medium addition channel;
8. stirring blades;
9. an electric motor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The methylene dichloride wastewater treatment method shown in figure 1 comprises the following steps:
step one, receiving dichloromethane wastewater;
adding lime into the dichloromethane wastewater until the dichloromethane wastewater has a set pH value, and preferably, the pH value is 9-10;
step three, heating the dichloromethane wastewater until the dichloromethane wastewater reaches a set temperature, wherein the set temperature is preferably 40-60 ℃, more preferably about 50 ℃ (such as 45-55 ℃), and preferably using steam for heating, so that a steam system which is conventionally equipped in a workshop can be utilized;
stirring the dichloromethane wastewater to ensure that the lime is fully contacted with dichloromethane in the wastewater, which is an optional step, and in other embodiments, the dichloromethane wastewater can be not stirred;
and (3) contacting the dichloromethane wastewater with lime for a period of time, wherein most dichloromethane can be treated when the time lasts for 2-3 hours, and if the time is longer, a small part of dichloromethane can still be treated, and the longer the reaction time is, the more dichloromethane is treated.
The sequence of step two and step three is not limited, and step four may be set before or after any of step one to step three.
The main component of the lime is calcium oxide, and after the dichloromethane wastewater reacts with the lime, the dichloromethane can be converted into formic acid which is convenient for biochemical treatment.
TABLE 1 Experimental conditions
As can be seen from the experimental conditions shown in Table 1, the effect of wastewater treatment is greatly affected by the set pH value and the set temperature, and the effect of wastewater treatment is better when the pH value is 9-10, the set temperature is 40-60 ℃, and more preferably 50 ℃. The longer the reaction time, the better the effect of wastewater treatment.
As shown in FIG. 2, the dichloromethane waste water treatment apparatus comprises a reaction vessel 1, wherein the reaction vessel 1 is used for loading dichloromethane waste water.
The lime adding device comprises a lime adding component 2, wherein the lime adding component 2 comprises a lime adding channel 6, the lime adding channel 6 extends into the reaction vessel 1, so that lime is introduced into the reaction vessel 1 to react with dichloromethane wastewater.
The device also comprises a heating assembly 3, wherein the heating assembly 3 comprises a heating medium adding channel 7, the outlet of the heating medium adding channel 7 is arranged at the bottom of the reaction container 1 so as to heat the waste water better, and a heating medium is introduced into the heating medium adding channel 7. In the embodiment, the heating medium is steam generated by a steam system which is conventionally equipped in a workshop, and the materials are convenient to obtain. In other embodiments, other heating elements, such as electrical heating rods or the like, may also be used. The wastewater is heated to a temperature of from 40 ℃ to 60 ℃, more preferably to about 50 ℃, for example from 45 ℃ to 55 ℃.
In order to bring the lime into contact with the methylene chloride more sufficiently, a stirring assembly 4 is provided in the reaction vessel 1, and the stirring assembly 4 includes a stirring blade 8 and a motor 9 for driving the stirring blade 8 to rotate.
In order to control the adding amount of lime, a pH meter 5 is also arranged in the reaction container 1, and the pH value of the wastewater is adjusted to be within the range of 9-10 according to the adding amount of the lime. The pH meter 5 is also in signal communication with the lime dosing assembly 2 to determine whether to continue adding lime based on the value measured by the pH meter 5.
The device has compact structure and obvious effect of processing dichloromethane wastewater, so that dichloromethane is converted into formic acid which is convenient for biochemical treatment. Aiming at the background technology, the invention adopts the dichloromethane wastewater and the lime to react at a certain temperature, thereby solving the problems of complex operation and higher requirement.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A dichloromethane wastewater treatment method is characterized by comprising the following steps:
step one, receiving dichloromethane wastewater;
adding lime into the dichloromethane wastewater until the dichloromethane wastewater has a set pH value;
step three, heating the dichloromethane wastewater until the dichloromethane wastewater reaches a set temperature;
the second step and the third step do not limit the sequence.
2. The methylene chloride wastewater treatment method according to claim 1, further comprising:
stirring the dichloromethane wastewater;
the step four is arranged before or after any step of the step one to the step three.
3. The method for treating dichloromethane wastewater according to claim 1, wherein: the pH value is set to be 9-10.
4. The method for treating dichloromethane wastewater according to claim 1, wherein: the set temperature is 40-60 ℃.
5. The methylene chloride wastewater treatment method according to claim 1, further comprising:
and (3) keeping the contact time of the dichloromethane wastewater and the lime for 2-3 hours.
6. A dichloromethane waste water treatment device is characterized by comprising:
a reaction vessel (1);
the lime dosing assembly (2) comprises a lime adding channel (6), and the lime adding channel (6) extends into the reaction vessel (1);
a heating assembly (3), the heating assembly (3) being arranged in the reaction vessel (1).
7. The dichloromethane wastewater treatment apparatus according to claim 6, further comprising:
a stirring assembly (4), the stirring assembly (4) being disposed in the reaction vessel (1).
8. The dichloromethane wastewater treatment apparatus according to claim 6, further comprising:
a pH meter (5), the pH meter (5) being disposed in the reaction vessel (1).
9. The dichloromethane wastewater treatment apparatus according to claim 8, wherein: the pH meter (5) is connected with the lime dosing assembly (2) in a signal mode.
10. The dichloromethane wastewater treatment apparatus according to claim 6, wherein: the heating assembly (3) comprises a heating medium adding channel (7), and an outlet of the heating medium adding channel (7) is arranged at the bottom of the reaction vessel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129228.XA CN110877944A (en) | 2019-11-18 | 2019-11-18 | Dichloromethane wastewater treatment method and treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129228.XA CN110877944A (en) | 2019-11-18 | 2019-11-18 | Dichloromethane wastewater treatment method and treatment device |
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| Publication Number | Publication Date |
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| CN110877944A true CN110877944A (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911129228.XA Pending CN110877944A (en) | 2019-11-18 | 2019-11-18 | Dichloromethane wastewater treatment method and treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394693A (en) * | 2022-01-22 | 2022-04-26 | 安徽科技学院 | Clarification treatment method for industrial oily wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH078990A (en) * | 1993-06-24 | 1995-01-13 | Chikyu Kankyo Sangyo Gijutsu Kenkyu Kiko | Method for treatment of waste water |
| JP2001239252A (en) * | 1999-12-22 | 2001-09-04 | Canon Inc | Method for cleaning polluted soil, device for cleaning polluted soil, chlorine-containing gas generator and polluted gas cracking device using this chlorine- containing gas generator |
| CN211367296U (en) * | 2019-11-18 | 2020-08-28 | 苏州淡林环境科技有限公司 | Dichloromethane waste water treatment device |
-
2019
- 2019-11-18 CN CN201911129228.XA patent/CN110877944A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH078990A (en) * | 1993-06-24 | 1995-01-13 | Chikyu Kankyo Sangyo Gijutsu Kenkyu Kiko | Method for treatment of waste water |
| JP2001239252A (en) * | 1999-12-22 | 2001-09-04 | Canon Inc | Method for cleaning polluted soil, device for cleaning polluted soil, chlorine-containing gas generator and polluted gas cracking device using this chlorine- containing gas generator |
| CN211367296U (en) * | 2019-11-18 | 2020-08-28 | 苏州淡林环境科技有限公司 | Dichloromethane waste water treatment device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394693A (en) * | 2022-01-22 | 2022-04-26 | 安徽科技学院 | Clarification treatment method for industrial oily wastewater |
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