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A kind of recovery process of magnesium hydroxide washing water

A technology of magnesium hydroxide and washing water, applied in magnesium hydroxide, chemical industry, alkali metal chloride and other directions, can solve the problems of blank, low technical level and low product quality of magnesium hydroxide washing water recycling, and achieve the realization of Economic and environmental win-win, lower production costs, and the effect of reducing emissions

Active Publication Date: 2016-03-09
SHANGHAI KAIXIN ISOLATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small scale, low product quality and low technical level of domestic production equipment, especially the recovery and utilization of magnesium hydroxide washing water is almost blank

Method used

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  • A kind of recovery process of magnesium hydroxide washing water
  • A kind of recovery process of magnesium hydroxide washing water
  • A kind of recovery process of magnesium hydroxide washing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A kind of magnesium hydroxide washing water recovery process, such as figure 1 As shown, the process includes the following steps:

[0060] (1) feed the magnesium hydroxide washing water into the raw material storage tank, add lye to adjust the pH value in the raw material storage tank, so that the magnesium hydroxide washing water produces magnesium hydroxide colloid;

[0061] (2) The magnesium hydroxide washing water flowing out from the raw material storage tank is filtered through the ultra / microfiltration unit, the magnesium hydroxide colloid and fine particles are trapped in the ultra / microfiltration unit, and the filtrate containing sodium chloride leaves the ultra / microfiltration unit unit, into the reverse osmosis unit;

[0062] (3) In the reverse osmosis unit, sodium chloride is concentrated and introduced into the sodium chloride concentrate storage tank, and the filtrate passing through the reverse osmosis unit is industrial water.

[0063] Step (1) compri...

Embodiment 2

[0077] A kind of magnesium hydroxide washing water recovery process, such as figure 1 As shown, the process includes the following steps:

[0078] (1) feed the magnesium hydroxide washing water into the raw material storage tank, add lye to adjust the pH value in the raw material storage tank, so that the magnesium hydroxide washing water produces magnesium hydroxide colloid;

[0079] (2) The magnesium hydroxide washing water flowing out from the raw material storage tank is filtered through the ultra / microfiltration unit, the magnesium hydroxide colloid and fine particles are trapped in the ultra / microfiltration unit, and the filtrate containing sodium chloride leaves the ultra / microfiltration unit unit, into the reverse osmosis unit;

[0080](3) In the reverse osmosis unit, sodium chloride is concentrated and introduced into the sodium chloride concentrate storage tank, and the filtrate passing through the reverse osmosis unit is industrial water.

[0081] Step (1) compris...

Embodiment 3

[0089] A kind of magnesium hydroxide washing water recovery process, such as figure 1 As shown, the process includes the following steps:

[0090] (1) feed the magnesium hydroxide washing water into the raw material storage tank, add lye to adjust the pH value in the raw material storage tank, so that the magnesium hydroxide washing water produces magnesium hydroxide colloid;

[0091] (2) The magnesium hydroxide washing water flowing out from the raw material storage tank is filtered through the ultra / microfiltration unit, the magnesium hydroxide colloid and fine particles are trapped in the ultra / microfiltration unit, and the filtrate containing sodium chloride leaves the ultra / microfiltration unit unit, into the reverse osmosis unit;

[0092] (3) In the reverse osmosis unit, sodium chloride is concentrated and introduced into the sodium chloride concentrate storage tank, and the filtrate passing through the reverse osmosis unit is industrial water.

[0093] Step (1) compri...

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Abstract

The invention relates to a magnesium hydroxide washing water recovery technology which comprises the following steps: magnesium hydroxide washing water is led into a raw material storage tank, an alkali liquid is added into the raw material storage tank to regulate the pH value to enable the magnesium hydroxide washing water to produce magnesium hydroxide colloid; the magnesium hydroxide washing water flowing out from the raw material storage tank is filtered by a super / microfiltration unit, the magnesium hydroxide colloid and fine particle matters are trapped in the super / microfiltration unit, sodium chloride-containing filtrate leaves the super / microfiltration unit to enter into a reverse osmosis unit; in the reverse osmosis unit, sodium chloride is concentrated and introduced into a sodium chloride concentration solution storage tank, and filtrate penetrating the reverse osmosis unit is industrial water. Compared with the prior art, by use of the technology, 99.9% of magnesium hydroxide and 99% of sodium chloride and 60-80% of water can be recovered, the production cost of production enterprises can be reduced, wastewater emissions and solid waste emissions can be greatly reduced, energy-saving emission reduction targets of the enterprises can be achieved.

Description

technical field [0001] The invention relates to the utilization of magnesium hydroxide washing water, in particular to a recovery process of magnesium hydroxide washing water. Background technique [0002] Magnesium hydroxide is a liquid-phase inorganic alkali product mainly used in the field of environmental protection. It has high activity, large specific surface area, strong adsorption capacity, strong buffer and neutralization capacity, non-precipitation, good fluidity, and convenient use and adjustment. , mild, safe, non-toxic, harmless, less corrosive, easy to operate, easy to recycle and comprehensively utilize by-products, etc. It is called an environmentally friendly "green and safe neutralizer" and is used in the neutralization of acidic wastewater, waste Heavy metal ions (Ni 2+ , Mn 2+ 、Cd 2+ 、Cu 2+ 、Cr 3+ 、Cr 6+ etc.) removal, flue gas desulfurization, printing and dyeing waste liquid treatment and other environmental protection fields, it has incomparable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04B01D61/58C01D3/04C01F5/14C02F1/44
CPCY02P20/10
Inventor 葛文越齐唯刘胜伟
Owner SHANGHAI KAIXIN ISOLATION TECH CO LTD
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