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Water treatment coagulant aid and preparation method thereof

A technology of coagulation aid and water treatment, which is applied in the field of water treatment coagulation aid and its preparation, which can solve the problems that the water quality is difficult to meet the national standard and the coagulation effect of water treatment is poor, so as to achieve remarkable coagulation aid effect and reduce the cost of water treatment , the effect of reducing consumption

Active Publication Date: 2012-04-25
XIAN ENVIROMENTAL PROTECTION IND TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a coagulation aid for water treatment and a preparation method thereof, in order to solve the problem that the coagulation effect of water treatment is poor and the water quality after treatment is difficult to reach the national standard when the water quality of the water source is at low temperature, low turbidity and low alkalinity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A coagulation aid for water treatment, containing the following raw materials in mass proportion: 83% of alkaline sodium silicate, 8% of potassium permanganate, 8.5% of potassium hydrogen persulfate and 0.5% of citric acid.

[0016] The preparation method is as follows: after the above raw materials are proportioned and measured, they are mixed and stirred evenly in a molten state to obtain a homogeneous transparent liquid.

[0017] Water source conditions of the place of use: a county in Shangluo, Shaanxi Province, water source: reservoir water, raw water turbidity: 400-500NTU, coagulation dose of about 100 kg per day, water turbidity after sinking 2NTU, factory water turbidity basically meets the standard, daily water supply 5000 tons.

[0018] The method of use is: when the raw water conditions and coagulant dosage (dosing at 20mg / l) remain unchanged. The using method of the product of the present invention: 1. dilute the water treatment coagulant aid and water acco...

Embodiment 2

[0021] A coagulation aid for water treatment, containing the following raw materials in mass proportion: 85% of alkaline sodium silicate, 7% of potassium permanganate, 7% of potassium hydrogen persulfate and 1% of citric acid.

[0022] The preparation method is as follows: after the above raw materials are proportioned and measured, they are stirred evenly in a molten state to obtain a homogeneous transparent liquid.

[0023] Water source conditions of the place of use: A tap water factory in Xi'an City, the water source water is reservoir water, from December to April of the next year, the raw water turbidity is 3∽5NTU, the water temperature is 4∽8℃, which is a typical low-temperature and low-turbidity water. When no coagulant is used, the alum flowers formed by adding polyaluminum ferric chloride are small and not dense, and it is difficult to settle, and the turbidity of the factory water sometimes exceeds the national standard of 1NTU.

[0024] The method of use is: whe...

Embodiment 3

[0027] A coagulation aid for water treatment, containing the following raw materials in mass proportion: 75% of alkaline sodium silicate, 12% of potassium permanganate, 12% of potassium hydrogen persulfate and 1% of citric acid.

[0028] The preparation method is as follows: after the above-mentioned raw materials are proportioned and measured, they are mixed and stirred evenly in a molten state to obtain a homogeneous transparent liquid.

[0029] Conditions of water sources used: A water company in the south of Shaanxi Province, due to endogenous pollution, the manganese content in raw water exceeds the standard from June to September every year. Due to the lack of pre-oxidation treatment, the turbidity and chroma of the effluent from the filter increased significantly after being disinfected by adding chlorine dioxide. .

[0030] The method of use is: when the raw water conditions and coagulant dosage (dosing at 20mg / l) remain unchanged. The using method of the product of ...

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Abstract

The invention relates to a water treatment coagulant aid and a preparation method thereof. When the raw water has special water quality of low temperature, low turbidity, low alkalinity and the like, the floccus forming speed and the floccus settling velocity are reduced along with reduction of water temperature; and the probability of particle impact is reduced in the water treatment flocculation process due to the reduction of the turbidity of the raw water so as to affect flocculation; therefore, the treatment of the water with low temperature, low turbidity and low alkalinity is a problemin water treatment. The invention provides the water treatment coagulant aid, which comprises the following raw materials in percentage by mass: 75 to 85 percent of alkali sodium silicate, 7 to 12 percent of potassium permanganate, 7 to 12 percent of potassium monopersulfate and 0.5 to 1 percent of citric acid, wherein the raw materials are prepared according to the proportion, and then the molten raw materials are mixed and stirred uniformly to form uniform transparent liquid. The water treatment coagulant aid has remarkable treatment effect on the raw water with low temperature, low turbidity and low alkalinity, can improve the effect of a coagulant, reduce the consumption of the coagulant, reduce the water treatment cost and effectively reduce the content of organic substances and the like in the water, has the function of removing color and smell, is easy to add, and does not need special equipment.

Description

technical field [0001] The invention belongs to the technical field of water treatment preparations for drinking water production, and relates to a coagulation aid for water treatment and a preparation method thereof. Background technique [0002] At present, the conventional drinking water production process using surface water as the water source mainly includes four stages: coagulation, sedimentation, filtration, and disinfection. -2006). However, when the raw water is of special water quality such as low temperature, low turbidity, and low alkalinity, the coagulation effect is poor when treated with conventional processes, and the water quality after treatment is difficult to meet the national standard. This is mainly because as the water temperature decreases, the viscosity of the water increases, and both the floc formation rate and the sedimentation rate decrease. In addition, the reduction of raw water turbidity reduces the probability of particle collision during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 苏林东赵胜美
Owner XIAN ENVIROMENTAL PROTECTION IND TRADE
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