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Technology and device of refining brine through organic tubular membrane

A technology of refined brine and tubular membranes, applied in membrane technology, semi-permeable membrane separation, permeation/dialysis water/sewage treatment, etc., can solve the problems of short ceramic membrane cleaning cycle, narrow ceramic membrane channel, and easy breakage, and achieve The effect of long chemical cleaning cycle, slow flux decay speed and strong anti-pollution ability

Inactive Publication Date: 2019-01-04
安徽星奇达膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process adopts cross-flow filtration technology, which effectively reduces membrane fouling, but there are the following problems in practical application: (1) The ceramic membrane is brittle and easy to break, and needs to be shut down for repair if there is a problem, and a set of ceramic membrane modules is often required on site (2) The channel of the ceramic membrane is narrow, which is prone to blockage of the membrane channel; (3) The cleaning cycle of the ceramic membrane is short, and it needs to be cleaned once a week, and the concentration of the cleaning agent is high, which requires 15% hydrochloric acid soaking; High energy consumption and high investment cost

Method used

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  • Technology and device of refining brine through organic tubular membrane
  • Technology and device of refining brine through organic tubular membrane
  • Technology and device of refining brine through organic tubular membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as figure 1 , 2 , Shown in 5, a kind of technique of organic tubular membrane refining brine, comprises the following steps: crude brine to be treated adds NaOH and NaOH in baffle tank 2 CO 3 Then it flows into the reaction tank, and the coarse brine in the reaction tank is sent to the organic tubular membrane system. The organic tubular membrane intercepts impurities such as suspended solids, colloids, and precipitates in the coarse brine, and the brine that passes through the organic tubular membrane is refined brine. The intercepted concentrated liquid is sent to the filter press, the pressed salt mud is transported outside for treatment, and the filtered liquid is returned to the reaction tank for recycling;

[0045] The organic tubular membrane system includes at least one organic tubular membrane stack 20, and the membrane stack inlet 21 and the membrane stack outlet 22 of the organic tubular membrane stack 20 are connected to a circulating pump 32 through ...

Embodiment 2

[0060] A device for purifying brine with organic tubular membrane, such as Figure 6 As shown, it includes the above-mentioned organic tubular membrane system 90, the raw liquid inlet port of the organic tubular membrane system 90 is connected with the outlet of the reaction barrel 103 of refined brine, and the filtrate outlet of the organic tubular membrane system 90 is connected to The refined brine tank 105 is connected, the concentrated liquid outlet of the organic tubular membrane system 90 is connected with the filter press 104, and the filter press outlet of the filter press 104 is connected with the reaction tank 103; the feed end of the reaction tank 103 passes through The baffle tank 102 is connected with the crude brine tank 101 .

Embodiment 3

[0062] The process of refining brine is as follows (such as figure 1 shown):

[0063] S1: The coarse brine to be treated is first sent into the baffle tank, and the refined NaOH and NaOH are metered into the baffle tank 2 CO 3 , and then flow into the reaction barrel, wherein, the Mg in the crude brine 2+ , Ca 2+ Respectively with NaOH, Na 2 CO 3 The reaction produces Mg(OH) 2 , CaCO 3 Solid matter; the amount of NaOH added is the same as Mg 2+ Excessive 0.1~0.3g / L after reaction, Na 2 CO 3 The amount added is the same as Ca 2+ Excessive 0.3-0.5g / L after reaction.

[0064] S2: The crude brine after the refining reaction is sent to the filtration system, and the organic tubular membrane stack intercepts impurities such as suspended solids, colloids, and sediments in the crude brine, and the brine that passes through the organic tubular membrane stack is the refined brine;

[0065] S3: The concentrated liquid intercepted by the organic tubular membrane stack is sent ...

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Abstract

The invention relates to a technology and a device of refining brine through an organic tubular membrane. The technology comprises the steps of crude brine refining reaction and brine filtration, wherein the brine filtration is to filter crude brine after the refining reaction through an organic tubular membrane system to form the refined brine; the organic tubular membrane system comprises at least one organic tubular membrane stack; membrane stack inlets and membrane stack outlets of the organic tubular membrane stacks are connected by circulating pipes and circulating pumps to form a circulating system; and at least two organic tubular membrane components are in series connection to form each entire organic tubular membrane stack. The technology is advanced; a technical process is simple; the refined brine is high in quality; and the organic tubular membrane system is high in integration level, small in floor area and strong in anti-pollution ability.

Description

technical field [0001] The invention belongs to the technical field of brine refining, and in particular relates to a process and a device for refining brine with an organic tubular membrane. Background technique [0002] At present, the domestic chlor-alkali industry mainly adopts the ion-exchange membrane method to make alkali, and uses saturated brine as raw material to electrolyze to produce sodium hydroxide and other products. OH - The insoluble matter produced by the reaction is deposited on the ionic membrane, which seriously affects the life of the ionic membrane. Therefore, brine refining is extremely important in the production process of ionic membrane alkali production. [0003] The domestic traditional primary brine refining process based on the "barrel reactor + Doyle clarifier + sand filter" process route has been basically eliminated. At present, domestic chlor-alkali enterprises mainly use the following two membrane filtration processes: Gore membrane, The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/14B01D61/00C02F1/44
CPCB01D61/00C01D3/14C02F1/44
Inventor 尹燕亓石风强吴江鹰
Owner 安徽星奇达膜科技有限公司
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