Unlock instant, AI-driven research and patent intelligence for your innovation.

Treatment method of waste water from para-ester production

A technology for the production of waste water and treatment methods, which is applied in the direction of water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., can solve the serious pollution problems of bit ester production, achieve high recovery rate, reduce costs, and waste water less effect

Active Publication Date: 2020-05-12
新乡市锦源化工有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a treatment method for para-ester production wastewater. The treatment method solves the problem of serious pollution in the production of para-ester. At the same time, it can efficiently remove COD and recycle according to the characteristics of high salt content and high COD content in sewage. Inorganic salt

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The para-ester production wastewater discharged from a factory is characterized by: salt content of 280,000 mg / L, COD of 82,000 mg / L, pH value of 6.2, and sodium sulfate content of about 63,000 mg / L.

[0054] The above waste water is treated as follows:

[0055] Step 1: Pass the para-ester production wastewater into the MVR evaporator, control the steam pressure to 0.7MPa, and the negative pressure in the evaporator is 1.2MPa, evaporate and concentrate to 70% of the original volume, and then enter the filter to collect the precipitated inorganic Salt crystals, waste water enters the next step of treatment.

[0056] Step 2: Add an appropriate amount of white mud to the wastewater treated in the first step to make the pH value reach about 6. If there is precipitation, filter to remove the precipitation, and the wastewater enters the next step of treatment.

[0057]Step 3: Pump the waste water from the second step into the flocculation tank, add mannan of yeast cell wall ...

Embodiment 2

[0064] The wastewater treated in this embodiment is the same as in Example 1, and the difference between the treatment process and Example 1 mainly lies in the different conditions during evaporation and concentration, as follows.

[0065] Step 1: Pass the waste water from para-ester production into the MVR evaporator, control the steam pressure to 0.9MPa, and the negative pressure in the evaporator is 1MPa, evaporate and concentrate to 90% of the original volume, and then enter the filter to collect the precipitated inorganic salts Crystals, waste water enters the next step of treatment.

[0066] The second step: add an appropriate amount of white mud to the wastewater treated in the first step to make the pH value reach about 6. If there is precipitation, filter to remove the precipitation, and the wastewater enters the next step of treatment.

[0067] Step 3: Pump the waste water from the second step into the flocculation tank, add mannan of yeast cell wall to it, the addit...

Embodiment 3

[0074] The wastewater treated in this embodiment is the same as that in Embodiment 1, and the difference between the treatment process and Embodiment 1 mainly lies in the different flocculants used, as follows.

[0075] Step 1: Pass the waste water from para-ester production into the MVR evaporator, control the steam pressure to 0.7MPa, and the negative pressure in the evaporator is 1.2MPa, evaporate and concentrate to 70% of the original volume, and then enter the filter to collect the precipitated inorganic Salt crystals, waste water enters the next step of treatment.

[0076] The second step: add an appropriate amount of white mud to the wastewater treated in the first step to make the pH value reach about 6. If there is precipitation, filter to remove the precipitation, and the wastewater enters the next step of treatment.

[0077] The third step: pump the wastewater from the second step into the flocculation tank, add polyacrylamide to it, the addition amount is 2mg / mL, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a treatment method of para-ester production wastewater. The treatment method of the para-ester production wastewater comprises the following steps of introducing the para-ester production wastewater into an evaporator, conducting evaporation and concentration till the volume of the para-ester production wastewater is 70%-90% of the original volume and collecting separated organic salt crystal; adjusting the pH value of the evaporated and concentrated wastewater to 6-8 and then conducting flocculation treatment to obtain clarified liquor; making the clarified liquor pass through a nano-filtration membrane and collecting permeated liquor and intercepted liquor respectively; conducting crystallization treatment on the permeated liquor; oxidizing the intercepted liquor and removing COD. According to the treatment method of the para-ester production wastewater, the problem of severe para-ester production pollution is solved; meanwhile, aiming at the characteristics that sewage is high in salt content, high in COD content and the like, COD can be efficiently removed, and organic salts are recycled.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for treating waste water produced by para-esters. Background technique [0002] Para-ester, alias p-(β-sulfate ethyl sulfone) aniline, vinyl sulfone sulfate, 4-sulfate ethyl sulfone aniline, p-β-hydroxyethylsulfone aniline sulfate, p-β-hydroxyethylsulfone aniline Sulfate. Para-ester is an important intermediate of reactive dyes, and is used to synthesize reactive dyes containing vinylsulfone groups such as EF type, KN type, M / KM type, and ME type. [0003] The para-ester is a temporary water-soluble group, which can not only improve the solubility of the dye when it is applied, but also the reactive dye containing hydroxyethyl sulfone sulfate group has a low affinity to the fiber during dyeing, which may achieve the effect of level dyeing and generate Dye-fiber ether bond, ether bond has good acid resistance and thermal stability, which is beneficial to improve washing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C01B17/96C02F101/34
CPCC01B17/96C02F1/00C02F1/04C02F1/442C02F1/52C02F1/66C02F1/72C02F9/00C02F2101/34C02F2209/06C02F2209/08C02F2209/20
Inventor 蔡红新陈东梅王元闫玲玲徐周庆
Owner 新乡市锦源化工有限公司