Method of recycling flucytosine chlorination wastewater

A technology of chlorinated wastewater and flucytosine, which is applied in chemical instruments and methods, natural water treatment, extracted water/sewage treatment, etc., can solve the problem of no recycling system for chlorinated wastewater, increased production costs of enterprises, and impact on the surrounding environment, etc. problems, to achieve the effect of reducing production water consumption and wastewater discharge, reducing treatment costs and improving economic benefits of enterprises

Inactive Publication Date: 2018-09-28
JINGHUA PHARMA GRP NANTONG
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current status of the process is that there is no comprehensive recycling system for chlorinated wastewater, and it is discharged after passing the three wastes treatment. The a

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  • Method of recycling flucytosine chlorination wastewater
  • Method of recycling flucytosine chlorination wastewater

Examples

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Embodiment 1

[0014] A method for recycling flucytosine chlorinated waste water, which comprises the following process steps: take 30 kg of waste water from the production line of flucytosine chlorination, send the above waste water into a chlorinated waste water treatment kettle, and open the waste water treatment still Stirring, the stirring speed is 180rpm, after cooling down to 10-20°C, continue to stir and add 20% calcium hydroxide solution dropwise, adjust the pH value to 9.0-10, filter through a filter, and filter to obtain phosphate solids and filter waste water. Filtration waste water is sent to chlorinated waste water extracting and washing tank, adds 2.4kg toluene and carries out extracting and washing 2 times, layering, and wherein upper strata is organic layer, and lower floor is water layer, and the hydrochloric acid solution that water layer is 8% with mass concentration is adjusted to pH is 6.5-7.5, 25kg of water is obtained after treatment, and the recovery rate is 83.3%. Th...

example 2

[0016] Such as figure 1 Shown, a kind of method for flucytosine chlorination waste water recycling, it comprises the following process steps: get waste water 50kg from the production industrial line of flucytosine chlorination, above-mentioned waste water is sent in the chlorination waste water treatment still, open Stir the wastewater treatment tank with a stirring speed of 180rpm. After cooling down to 10-15°C, continue to stir and add 20% calcium hydroxide solution dropwise to adjust the pH value to 9.0-10. Filter through a filter to obtain phosphate solids and filter Wastewater, the filtered waste water is sent to the extraction and washing kettle of chlorinated wastewater, and 4.5kg of toluene is added to carry out extraction and washing for 2 times, layered, wherein the upper layer is an organic layer, and the lower layer is an aqueous layer, and the aqueous layer is adjusted with a hydrochloric acid solution with a mass concentration of 8%. When the pH is 6.5-7.5, 42kg ...

example 3

[0018] Such as figure 1 Shown, a kind of method for flucytosine chlorination waste water recycling, it comprises the following process steps: get waste water 50kg from the production industrial line of flucytosine chlorination, above-mentioned waste water is sent in the chlorination waste water treatment still, open Stir the wastewater treatment tank at a stirring speed of 180rpm. After cooling down to 15-20°C, continue to stir and add 20% calcium hydroxide solution dropwise to adjust the pH value to 9.0-10. Filter through a filter to obtain phosphate solids and filter Wastewater, the filtered waste water is sent to the extraction and washing kettle of chlorinated wastewater, and 5.0kg toluene is added to extract and wash 3 times, and the layers are layered, wherein the upper layer is an organic layer, and the lower layer is an aqueous layer, and the aqueous layer is adjusted with a hydrochloric acid solution with a mass concentration of 8%. When the pH is 6.5-7.5, 41kg of wat...

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Abstract

The invention discloses a method of recycling flucytosine chlorination wastewater, which includes the steps of: 1) sending the flucytosine chlorination wastewater to a chlorination wastewater treatment kettle, stirring and cooling the wastewater at rotation speed of 180 rpm, dropwise-adding a Ca(OH)2 solution to neutralize the wastewater and regulate pH value to generate phosphate solid; 2) filtering the wastewater to remove the phosphate solid, and sending filtered wastewater to a chlorination wastewater extraction washing kettle; 3) adding a solvent to perform extraction washing, and layering the mixture to obtain an upper layer being an organic layer and a lower layer being a water layer; 4) removing the organic layer, and regulating pH of the water later to 6.5-7.5 with an 8 mass% hydrochloric acid solution; 5) feeding the water layer to a flucytosine chlorination industrial production line for recycling use. The method is advantaged in that the treated wastewater can be recycled,so that water consumption and wastewater emission during production are greatly reduced, thus reducing wastewater treatment cost and increasing economic benefit of enterprises. The method satisfies the concept of modern green and environment-friendly production.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for recycling flucytosine chlorinated wastewater. Background technique [0002] Flucytosine chlorination production process produces a large amount of wastewater. Specifically, for every ton of flucytosine produced, 8.7 tons of chlorinated wastewater will be produced, and the chlorinated wastewater is highly acidic, has high phosphorus content, and is highly toxic. The current status of the process is that there is no comprehensive recycling system for chlorinated wastewater, and it is discharged after passing the three wastes treatment. The industrial water consumption and wastewater discharge are very large, which leads to an increase in the production cost of the enterprise and may also affect the surrounding environment. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies of the prior art, ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/36
CPCC02F9/00C02F1/001C02F1/26C02F1/66C02F2103/36
Inventor 顾健波沈小娟吴竞周莉莉吴玉祥
Owner JINGHUA PHARMA GRP NANTONG
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