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Method for treating sulfur wastewater

A treatment method and technology for wastewater, which are applied in the fields of energy wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc. Complete and other problems, to achieve the effect of shortened reaction time, good effect and simple desulphurization process

Inactive Publication Date: 2016-12-07
何晓东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, this method has the problems of incomplete sulfur removal and large consumption of flocculants, which cannot better treat sulfur-containing wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] S1: add formic acid polystyrene resin and methyl palmitate to the sulfur wastewater, the mass ratio of the three is 1:2:40, and react at a temperature of 90°C for 1 hour to obtain a reaction solution A;

[0024] S2: Adjust the pH value of the reaction solution A in step S1 to 8.0, and then concentrate it through a three-effect evaporator device under negative pressure, wherein the first-effect evaporation temperature is 78°C and the pressure is 0.07MPa; the second-effect evaporation temperature is 88°C , the pressure is 0.08Mpa; the three-effect evaporation temperature is 85°C, and the pressure is 0.06Mpa. The density of the reaction solution A is 1.5 times the density of water; then cooled to 10°C in a crystal separator to separate the crystal liquid to obtain a mixed solution B;

[0025] S3: Add polyacrylamide, iron stearate, aluminum acrylate, ethanol and activated carbon with a mass ratio of 1:3:4:30:0.3 into the reactor, stir at 120°C for 2h, and then pass through ...

Embodiment 2

[0033] S1: add formic acid polystyrene resin and methyl palmitate to the sulfur wastewater, the mass ratio of the three is 2:4:55, and react at a temperature of 120°C for 2 hours to obtain a reaction solution A;

[0034] S2: Adjust the pH value of the reaction solution A in step S1 to 9.0, and then concentrate it through a three-effect evaporator device under negative pressure, wherein the first-effect evaporation temperature is 85°C and the pressure is 0.08MPa; the second-effect evaporation temperature is 100°C , the pressure is 0.09Mpa; the three-effect evaporation temperature is 90°C, and the pressure is 0.07Mpa. The density of the reaction solution A is 2.0 times the density of water; then cooled to 15°C in a crystal separator to separate the crystal liquid to obtain a mixed solution B;

[0035] S3: Add polyacrylamide, iron stearate, aluminum acrylate, ethanol and activated carbon with a mass ratio of 1:3:4:30:0.5 into the reactor, stir at 130°C for 3h, and then pass throu...

Embodiment 3

[0043] S1: add formic acid polystyrene resin and methyl palmitate to the sulfur wastewater, the mass ratio of the three is 1:2:55, and react at a temperature of 90°C for 1 hour to obtain a reaction solution A;

[0044] S2: Adjust the pH value of the reaction solution A in step S1 to 8.5, and then concentrate it through a three-effect evaporator device under negative pressure, wherein the first-effect evaporation temperature is 80°C and the pressure is 0.075MPa; the second-effect evaporation temperature is 90°C , the pressure is 0.085Mpa; the three-effect evaporation temperature is 88°C, and the pressure is 0.065Mpa, so that the density of the reaction liquid A is 2.0 times the water density; then it is cooled to 12°C in the crystal separator, and the crystal liquid is separated to obtain a mixed Liquid B;

[0045] S3: Add polyacrylamide, iron stearate, aluminum acrylate, ethanol and activated carbon with a mass ratio of 1:3:4:30:0.7 into the reactor, stir at 125°C for 2.5h, an...

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PUM

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Abstract

The invention discloses a method for treating sulfur wastewater. The method includes the steps that formyl polystyrene resin and methyl palmitate are added into the sulfur wastewater, the mixture is reacted at the temperature of 90 DEG C to 120 DEG C for 1 h to 2 h, and a reaction solution A is obtained; the PH value of the reaction solution is adjusted to be 8.0 to 9.0, and the reaction solution is subjected to negative-pressure concentration through a triple effect evaporator to allow the density of the reaction solution A to be 1.5 to 2.0 times that of water; then the obtained reaction solution is cooled in a crystallization separator to be at the temperature of 10 DEG C to 15 DEG C, crystals and liquid are separated, and mixed liquor B is obtained; active carbon loading polyacrylamide, ferric stearate and aluminum acrylate is added into the mixed liquor B, and the mixture is stirred and reacted for 2 h to 3 h at the temperature of 130 DEG C to 150 DEG C at the rotating speed of 500 r / min to 650 r / min; then molecular sieves loading diethyl carbonate are added, the mixture is stirred for 30 min to 40 min at the temperature of 90 DEG C to 100 DEG C at the speed of 250 r / min to 300 r / min, and the treated wastewater can be obtained after filtering. By means of the method, the sulfur content in the wastewater is greatly reduced; meanwhile, flocculating agents are greatly reduced, and the sulfur removing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for sulfur wastewater. Background technique [0002] With the acceleration of my country's modernization process, the energy industry is developing rapidly, and coal-fired power plants are widely emerging. People's living standards have been greatly improved, and modern buildings have sprung up like mushrooms. However, with the continuous increase in fuel consumption, sulfur dioxide emissions are increasing, resulting in increasingly serious air pollution and a large number of Sulfur-containing wastewater. [0003] my country's power plant flue gas desulfurization technology started in 1961. Research institutes and colleges and universities have successively invested in the exploration and research of dry, wet and semi-dry flue gas desulfurization. The Ministry of Science and Technology (formerly the State Science and Technology Commis...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCY02W10/37C02F9/00C02F1/048C02F1/66C02F2001/5218
Inventor 何晓东
Owner 何晓东
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