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Method and device for preparing bactericide
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A bactericide and solution technology, applied in the field of preparation of bactericides, can solve the problems of high power consumption, reduced seawater desalination efficiency, low electrolysis efficiency, etc.
Inactive Publication Date: 2016-10-12
SHOUGANG JINGTANG IRON & STEEL CO LTD
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[0006] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for preparing a sterilizing agent to solve the problem of high power consumption and low electrolysis efficiency when the seawater bactericide is prepared by directly using electrolyzed seawater in the prior art. Technical problems that lead to reduced desalination efficiency
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Embodiment 1
[0039] This embodiment provides a kind of method for preparing fungicide, such as figure 1 As shown, the method includes the following steps:
[0040] Step 110, at 1m 3 Add 5-6 kg of sodium carbonate to the concentrated brine, and obtain the first solution after reaction, precipitation and filtration.
[0041] In this step, firstly, concentrated brine will be prepared using seawater desalination equipment, specifically, as figure 2 As shown, the seawater desalination equipment includes: a booster pump 1, a heat source 2, an evaporator 3, a circulating pump 4, a first regulating valve 5, and a second regulating valve 6; wherein,
[0042] The heat source 2 is used to provide steam for the evaporator 3, and the evaporator 3 utilizes steam to exchange heat with seawater entering the evaporator 3 to obtain finished water and brine. The finished product water refers to water with a salinity rate not greater than 5 mg / L.
[0043] see figure 2 , the evaporator comprises: one-ef...
Embodiment 2
[0079] Corresponding to Embodiment 1, this embodiment also provides a device for preparing bactericide, such as image 3 As shown, the device includes: a first reactor 31, a first settler 32, a first filter membrane 33, a first filter 34, a first filter press 35, a second reactor 36, a second settler 37 , the second filter membrane 38, the second filter 39, the second filter press 40;
[0080] The first reactor 31 is used for 1m 3 The concentrated brine is reacted with 5-6kg of sodium carbonate, and after the reaction, the first reaction solution is obtained. After the first reaction solution is obtained, the first settler 32 is used to settle the first reaction solution to obtain the first solution (ie the solution in the upper layer of the first settler 32 ). After the first solution is obtained, the first filter membrane 33 is used to filter the first solution. Wherein, the first filter membrane 33 may specifically include an ultrafiltration membrane or the like. Here, ...
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Abstract
The invention provides a method and device for preparing a bactericide, the method comprising: 3 Add 5-6kg of sodiumcarbonate to the concentrated brine, react, precipitate and filter to obtain the first solution; add 3-3.5kg of sodiumhydroxide to the first solution, react, precipitate and filter to obtain the second solution; Adding 8-9 kg of 33% hydrochloric acid into the second solution to adjust the pH value of the second solution; electrolyzing the second solution to generate sodiumhypochlorite. In this way, by using the concentrated brine after decalcification and magnesium removal to carry out electrolysis to prepare sodium hypochlorite as a bactericide, the high temperature of the concentrated brine can effectively reduce power consumption; the high salt content (higher chlorideion concentration) of the concentrated brine can effectively Improve the efficiency of electrolysis; and, when the concentration of calcium and magnesium ions in the concentrated brine is reduced, it can effectively reduce the risk of fouling of the electrode plate in the electrolytic cell.
Description
technical field [0001] The invention belongs to the technical field of seawaterdesalination, and in particular relates to a method and a device for preparing a bactericide. Background technique [0002] With the increasing shortage of fresh water resources in our country, seawaterdesalination has been more and more widely used. For seawaterdesalination enterprises, the pollution caused by marine organisms has always been a difficult problem to solve. Marine organisms can cause corrosion, scaling, and blockage of seawater desalination equipment. Therefore, before seawater desalination, it is necessary to use a large amount of fungicides in the feed seawater to ensure the purity of the feed seawater. [0003] In the prior art, adding fungicides to the seawater feed mainly includes two methods: first, adding liquid chlorine, sodium hypochlorite, potassiumpermanganate, chlorine dioxide and other fungicides to the seawater, but due to the need for seawater desalination The ...
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