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Saline water purification device and heavy metal removal method

A purification device and heavy metal technology, applied in chemical instruments and methods, alkali metal chlorides, water pollutants, etc., can solve problems such as excessive dosage of chemicals, increased energy consumption of salt water evaporation, and low purity of salt products

Pending Publication Date: 2022-07-29
深圳市小荷环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another object of the present invention is to provide a method to control the amount of medicament dosage in an appropriate range, reduce the waste of medicament, and keep the brine concentration from being diluted at the same time, so as to solve the problems of excessive medicament in the existing brine impurity removal, increased energy consumption of brine evaporation after purification, Heavy metal removal method for the problem of low purity of salt products

Method used

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  • Saline water purification device and heavy metal removal method
  • Saline water purification device and heavy metal removal method
  • Saline water purification device and heavy metal removal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1: Brine purification device

[0054] see figure 1 As shown in the figure, the structure of the salt water purification device of the present invention includes: a mixing barrel 1, a water pump 2, a filter barrel 3, and a self-priming pump 4 connected in sequence by pipelines; the upper opening of the mixing barrel 1 is equipped with a mixer 5 and a The electric mixer 12, the filter barrel 3 is provided with a flat membrane assembly 6; the three-way pipe 71 connects the self-priming pump 4 with the first electric ball valve 72 and the second electric ball valve 73, and the first electric ball valve 72 is connected with ten heads The flow divider 8 is connected to the water production port of the first flat membrane placed vertically through the pipeline, and the second electric ball valve 73 is connected to the water production port of the second flat membrane placed horizontally through the pipe joint and the pipeline.

[0055] see figure 2 , image 3 As sh...

Embodiment 2

[0059] Example 2: Flat membrane filtration and cleaning of salt water purification device

[0060] The salt water containing heavy metal sediments that has been mixed and precipitated in the 1-ton mixing tank 1 is transported to the filter tank 3 by the water pump 2. The flat membrane module 6 in the filter tank 3 is composed of 10 vertically parallel flat membranes 61 and 1 horizontally placed The horizontal flat film 61 is placed under 10 vertical flat films 62. The distance between the top of the vertical flat membrane 61 and the upper part of the filter barrel 3 is 300 mm. The first float level gauge 72 controls the start and stop of the water pump 2 . When the liquid level and the upper part of the filter bucket 3 are less than 100mm, the water pump 2 stops working, and the salt water in the mixing bucket 1 will not enter the filter bucket 3 again. When the liquid level and the upper part of the filter bucket 3 are greater than 300mm, the water pump 2 is started, and th...

Embodiment 3

[0063] Example 3: Sodium chloride brine purification and acid adjustment

[0064] Adjust the pH value of the brine before removing heavy metals by using the brine purification device in Example 1, and adjust the pH of the brine from 11 to 6.5 by using concentrated hydrochloric acid. According to the beaker experiment, add 2.5ml of concentrated hydrochloric acid per liter of brine, when the mixer gate valve 51 It has been closed, the mixer 5 contains brine, and when the mixer 52 on the upper part of the mixer 5 is in a stirring state, it starts to add concentrated hydrochloric acid. According to the proportional enlargement of the beaker test, it is necessary to put 2.5L of concentrated hydrochloric acid into the stirring tank 1 of 1 ton of brine, and use a syringe (not shown in the figure) to inhale 1L of concentrated hydrochloric acid and inject it into the liquid injection port above the mixer 5 (not shown in the figure), After the injection is completed, wait for 1 minute, ...

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Abstract

The invention relates to a saline water purification device and a heavy metal removal method. The saline water purification device is composed of a stirring barrel, a water pump, a filtering barrel and a self-priming pump which are sequentially connected through pipelines. A mixer and an electric stirrer are arranged at an opening in the upper part of the stirring barrel; a self-priming pump is connected with a first electric ball valve and a second electric ball valve through a three-way pipe, the first electric ball valve is connected with a ten-head flow divider, the flow divider is connected into a water production port of a first flat sheet membrane which is vertically placed through a pipeline, and the second electric ball valve is connected into a water production port of a second flat sheet membrane which is transversely placed through a pipe joint and a pipeline. The heavy metal removal method for saline water purification comprises the following steps: (1) feeding: sequentially feeding hydrochloric acid and a heavy metal trapping agent into a stirring barrel containing saline water; (2) mixing and precipitating: stirring for a set time to enable the heavy metal trapping agent to react with heavy metal ions in the saline water, stopping stirring and standing; (3) filtering: filtering the saline water in the stirring barrel by using a flat membrane; (4) discharging: discharging salt water which cannot be filtered into a stirring barrel; (5) cleaning the flat membrane.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and particularly relates to a salt water purification device and a heavy metal removal method. Background technique [0002] Salt-containing solid wastes such as fly ash produced by the incineration of domestic waste can be washed with water to effectively remove soluble salts. In addition to a large amount of sodium chloride, calcium chloride, potassium chloride, etc., the brine produced by fly ash washing also contains a certain amount of heavy metal chloride. Brine can be made into industrial salt products by evaporation and concentration. Heavy metals in brine will affect the purity of industrial salt products, so it is necessary to purify the brine before evaporation and concentration. [0003] The pH value of the brine after the fly ash washing is between 11 and 12, which is an alkaline brine. The suitable pH range of the heavy metal scavenger is 6.5 to 7.5, and the effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01D3/06C02F101/20
CPCC02F9/00C01D3/06C02F2101/20C02F1/66C02F1/44C02F2303/14C02F2209/06C02F2209/42C02F1/5236
Inventor 王丹丹谢巧玲
Owner 深圳市小荷环保技术有限公司
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