CN209940669U - Device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted - Google Patents
Device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted Download PDFInfo
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- CN209940669U CN209940669U CN201920296080.8U CN201920296080U CN209940669U CN 209940669 U CN209940669 U CN 209940669U CN 201920296080 U CN201920296080 U CN 201920296080U CN 209940669 U CN209940669 U CN 209940669U
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Abstract
The utility model discloses a device that acid out and oxidation allies oneself with to be used jointly to handle thiophosphoric acid diester waste water and adopt has acidizing cauldron, conductivity tester, two way check valve according to reaction flow, and two way check valve connects reposition of redundant personnel pipeline A, reposition of redundant personnel pipeline B respectively, and reposition of redundant personnel pipeline A UNICOM oxidation cauldron, reposition of redundant personnel pipeline B UNICOM waste oil tank. The utility model discloses an equipment spare part is less, the setting of two-way valve and reposition of redundant personnel pipeline for reaction intermediate separation realizes easily, and the control through the conductivity makes the separation of two kinds of compositions more accurate, and the alkali lye supply among the oxidation kettle need not to use other containers, and equipment cost is low.
Description
Technical Field
The utility model relates to a wastewater treatment device in the chemical industry.
Background
The thiophosphoric diester is an organophosphorus flame retardant with better flame retardance, has double functions of flame retardance and plasticization, has less corrosivity and toxicity than halogen flame retardants, and thus has wide development prospect. In the process of generating dithio pyrophosphate by taking pyridine as an acid-binding agent, high-concentration organic wastewater containing pyridine and thiopyrophosphoric acid is generated. The waste water has high toxicity and poor biodegradability, and if the waste water cannot be effectively treated, the waste water not only pollutes the environment, but also wastes useful resources.
Acid precipitation sedimentation is to convert some substances from a dissolved state or a colloidal state into a suspended state under an acidic condition and separate the substances from a solution by using methods such as flocculation precipitation, air flotation and the like.
Fenton oxidation is carried out under acidic conditions with Fe2+As catalyst, with H2O2A method for treating wastewater by chemical oxidation. Fe2+、H2O2The system of the composition is called Fenton reagent, and the reaction mechanism is Fe2+And H2O2The hydroxyl free radical with strong oxidizing property is generated by the reaction, and generates organic free radical with organic matters which are difficult to degrade in aqueous solution, so that the structure of the organic matters is destroyed, and finally, the oxidative decomposition is realized.
Disclosure of Invention
Utility model purpose: provides a device for treating the waste water of the thiophosphoric acid diester by combining acidification and oxidation, which has high efficiency, environmental protection, good purification effect and less discharge.
The technical scheme is as follows: the utility model discloses a device of thiophosphoric acid diester waste water is used with oxidation to acidification and separation has the acidizing cauldron (the sulphuric acid entry that has the top, waste water entry, and the acidizing fluid export of bottom), conductivity tester, two way check valve according to reaction flow, and two way check valve connects reposition of redundant personnel pipeline A, reposition of redundant personnel pipeline B respectively, and reposition of redundant personnel pipeline A UNICOM oxidation kettle, reposition of redundant personnel pipeline B UNICOM waste oil tank. An alkali liquor port is arranged above the oxidation kettle and communicated with an alkali liquor supply tank; a wastewater outlet is arranged below the oxidation kettle and communicated with the post-treatment device; the waste oil tank is provided with an oil outlet connected with the incineration device. And stirring devices are respectively connected in the acidification kettle and the oxidation kettle, so that the reaction solution in the acidification kettle and the oxidation kettle can be stirred conveniently, and the reaction is uniform and thorough.
The utility model discloses can adopt following processing procedure:
(1) the COD of the thiophosphoric diester wastewater is more than 90000ppm, the total phosphorus is more than 8000ppm, the wastewater is acidified by concentrated sulfuric acid in an acidification kettle, and the phosphorus impurities in the wastewater are converted into a floating state by utilizing the characteristic that the phosphorus impurities have low solubility under a strong acid condition.
(2) After the acidification is finished, conveying the lower-layer wastewater to an oxidation treatment kettle, and putting the acidified wastewater into the oxidation treatment kettle under interlocking control by utilizing the characteristic that the conductivity of a water layer is different from that of an oil layer, wherein the COD (chemical oxygen demand) of the treated wastewater is less than 40000ppm, and the total phosphorus is less than 4000 ppm; the floating oil is put into a waste oil tank and is used for incineration treatment in the later period.
(3) The Fenton oxidation reagent is added for oxidation reaction between the pH value of the mixture adjusted in a chain manner to 2.5 ~ 3.5.5, the oxidation reaction is carried out under the acidic condition, the reaction has the catalytic effect, the speed is high, the conversion rate is high, the reaction temperature is controlled to be 45-55 ℃, and the reaction time is 2-4 hours.
(4) Adding liquid alkali to adjust the pH value to about 7, standing, filtering while hot to obtain iron salt, and reusing the iron salt to prepare a Fenton oxidation reagent so as to save useful resources. The waste water is cooled and then centrifuged to obtain the byproduct mirabilite, wherein the COD of the waste water is 3000-5000ppm, the total phosphorus is 300-500ppm, and the waste water has better direct biodegradability.
Has the advantages that:
the utility model discloses an degree of automation is high, and waste water treatment is effectual, and COD, total phosphorus can be followed 90000ppm, 8000ppm and dropped to 4200ppm, 360ppm, and COD, total phosphorus clearance reach more than 95%, and waste water has direct biochemical nature, and valuable midbody and waste material obtain abundant recycle, have practiced thrift the resource, have reduced the emission, have better economic environmental protection performance. The utility model discloses an equipment spare part is less, the setting of two way check valve and reposition of redundant personnel pipeline for reaction intermediate separation realizes easily, and the control of conductivity makes the separation of two kinds of compositions more accurate, and the alkali lye supply among the oxidation kettle need not to use other containers, and equipment cost is low, and later stage reaction treatment is efficient.
Drawings
FIG. 1 is a schematic view of a connection structure of a device according to the present invention;
in the figure, 1-an acidification treatment kettle, 2-a stirring device, 3-a concentrated sulfuric acid supply tank, 4-a wastewater source, 5-a conductivity tester, 6-an acidification liquid outlet, 7-a two-way valve, 8-a diversion pipeline A, 9-an alkali liquid supply tank, 10-an oxidation kettle, 11-a wastewater outlet, 12-a post-treatment device, 13-an incineration device, 14-a waste oil tank and 15-a diversion pipeline B.
Detailed Description
The device for treating the waste water of the thiophosphoric acid diester by combining the acid precipitation and the oxidation as shown in the figure 1 sequentially comprises an acidification kettle, a conductivity tester and a two-way valve according to a reaction flow; the two-way valve is respectively connected with a shunt pipeline A and a shunt pipeline B, the shunt pipeline A is communicated with the oxidation kettle, and the shunt pipeline B is communicated with the waste oil tank; a wastewater outlet is arranged below the oxidation kettle and communicated with the post-treatment device; the waste oil tank is provided with an oil outlet and is connected with the incineration device.
A sulfuric acid inlet and a wastewater inlet are arranged above the acidification kettle, and an acidification liquid outlet is arranged at the bottom of the acidification kettle; an alkali liquor port is arranged above the oxidation kettle and communicated with an alkali liquor supply tank; and the acidification kettle and the oxidation kettle are respectively connected with a stirring device.
Claims (4)
1. The utility model provides a device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted which characterized in that: according to the reaction flow, the device is sequentially provided with an acidification kettle, a conductivity tester and a two-way valve; the two-way valve is respectively connected with a shunt pipeline A and a shunt pipeline B, the shunt pipeline A is communicated with the oxidation kettle, and the shunt pipeline B is communicated with the waste oil tank; a wastewater outlet is arranged below the oxidation kettle and communicated with the post-treatment device; the waste oil tank is provided with an oil outlet and is connected with the incineration device.
2. The apparatus for treating a phosphorothioate diester wastewater with the combination of acidification and oxidation according to claim 1, wherein: and the acidification kettle and the oxidation kettle are respectively connected with a stirring device.
3. The apparatus for treating a phosphorothioate diester wastewater with the combination of acidification and oxidation as claimed in claim 2, wherein:
the upper part of the acidification kettle is provided with a sulfuric acid inlet and a waste water inlet, and the bottom of the acidification kettle is provided with an acidification liquid outlet.
4. The apparatus for treating a phosphorothioate diester wastewater with the combination of acidification and oxidation as claimed in claim 1, 2 or 3, wherein: an alkali liquor port is arranged above the oxidation kettle and communicated with an alkali liquor supply tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920296080.8U CN209940669U (en) | 2019-03-08 | 2019-03-08 | Device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920296080.8U CN209940669U (en) | 2019-03-08 | 2019-03-08 | Device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted |
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| Publication Number | Publication Date |
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| CN209940669U true CN209940669U (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920296080.8U Active CN209940669U (en) | 2019-03-08 | 2019-03-08 | Device that acidification and oxidation were used jointly to handle thiophosphoric acid diester waste water and are adopted |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209940669U (en) |
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2019
- 2019-03-08 CN CN201920296080.8U patent/CN209940669U/en active Active
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