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Method and device for recycling low-concentration brine

A brine circulation and low-concentration technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as increasing consumption, affecting the ecological environment, and increasing costs, and achieve reduction The effect of production cost, less human resources and low infrastructure cost

Active Publication Date: 2014-02-26
四川绿食佳农业有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] At present, there are mainly three methods for the treatment of brine with a certain concentration: one is direct discharge, but this method not only causes serious pollution to the environment, causes soil salinization, affects water quality and soil quality, affects the ecological environment, and causes environmental pollution, Moreover, a large amount of table salt is wasted in vain, which is not conducive to the realization of circular economy and increases the cost; the second is to dilute it and discharge it after reaching the discharge standard. Reduce the amount of water used to further increase the cost: the third method adopts some deep processing methods to turn salt water into treasure and increase the added value of products. For example, the processed salt water is further concentrated and processed into soy sauce, which can solve the problem of environmental pollution. Realized processing added value again, but this method has increased production cost and waste brine treatment cost again

Method used

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  • Method and device for recycling low-concentration brine
  • Method and device for recycling low-concentration brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: a kind of low-concentration saline brine recycling method comprises the following steps:

[0033] S10, collecting salt water, collecting salt water with a concentration of 15%;

[0034] S20, filtering, filtering the brine, and removing large particles of impurities and fine impurities in the brine in turn;

[0035] S30, activated carbon adsorption, through activated carbon to absorb free substances in the filtered brine, and remove peculiar smell, to obtain filtered and purified brine, the activated carbon is in the form of powder, granular and cylindrical activated carbon, selected from fruit shell activated carbon , wood activated carbon, coal-based activated carbon, any one or their mixture, the three activated carbons have good adsorption effect on the organic matter and pigment in the brine;

[0036] S40, chemical sterilization, adding sodium hypochlorite solution to the filtered and purified salt water to remove harmful microorganisms in the salt wa...

Embodiment 2

[0039] Embodiment 2: low-concentration saline brine recycling method, such as figure 1 shown, including the following steps:

[0040] S100, collecting brine, collecting brine with a concentration of 10%;

[0041] S200, initial filtration, the brine is initially filtered through the filter to remove large particles of impurities in the brine, among which, the filter of various materials that can remove large particles of impurities can be used in the initial filtration, generally speaking, the filter is made of metal It is made of silk, and the appropriate filter mesh diameter is selected according to the specific conditions of impurities contained in the brine. Generally, the mesh diameter of the filter mesh is at least 20 mesh;

[0042] S300, fine filtration, the brine after primary filtration is fine-filtered by a filter press to remove fine impurities in the brine, and the fine filter can be selected with a large processing capacity, low cost, good filtering effect, and is...

Embodiment 3

[0047] Embodiment 3: the same as Embodiment 2, the difference is:

[0048] S300, fine filtration, performing fine filtration on the brine after the preliminary filtration through a plate and frame filter press, so as to remove fine impurities in the brine;

[0049] S400, activated carbon adsorption, through the shell activated carbon to absorb the free substances in the finely filtered brine, and remove the peculiar smell, so as to obtain the filtered and purified brine, wherein the temperature of the finely filtered brine is kept at 45 °C, and the fruit shell activated carbon is added The amount is 5.0% of the brine after fine filtration, and the adsorption time is 60 minutes;

[0050]S500, chemical sterilization, adding sodium hypochlorite solution to the filtered and purified brine to remove harmful microorganisms in the brine, wherein the concentration of the sodium hypochlorite solution is 3mg / L, and the sterilization time is 50min;

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Abstract

The invention relates to a method and a device for recycling low-concentration brine and particularly relates to a method and a device for recycling low-concentration brine. The method comprises the following steps of: collecting the low-concentration brine with concentration less than 15%; filtering the brine to remove large-particle impurities and fine impurities in the brine in sequence; adsorbing free substances in the filtered brine by active carbon, and removing peculiar smell to obtain filtered and purified brine; adding sodium hypochlorite solution into the filtered and purified brine to remove harmful microorganisms in the brine; diluting the brine until concentration is less than 5% according to needs; and realizing recycling of the brine by using the purified brine obtained by treatment for cleaning and desalting of fermented vegetables. Purified brine treated by the method disclosed by the invention reaches requirements of water for processing and purifying the fermented vegetables, can be used for cleaning or desalting the fermented vegetables, so that the brine is recycled, production cost is lowered, and protective effect for environment is also achieved.

Description

technical field [0001] The invention relates to a saline brine recycling method and equipment, in particular to a low-concentration saline brine recycling method and equipment. Background technique [0002] At present, there are mainly three methods for the treatment of brine with a certain concentration: one is direct discharge, but this method not only causes serious pollution to the environment, causes soil salinization, affects water quality and soil quality, affects the ecological environment, and causes environmental pollution, Moreover, a large amount of table salt is wasted in vain, which is not conducive to the realization of circular economy and increases the cost; the second is to dilute it and discharge it after reaching the discharge standard. Reduce the amount of water used to further increase the cost: the third method adopts some deep processing methods to turn salt water into treasure and increase the added value of products. For example, the processed salt ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 卢晓黎杨欢陈丽兰杨国军虞桂兰
Owner 四川绿食佳农业有限公司
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