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Method and device thereof for secondarily diluting and feeding coagulant

A technology of secondary dilution and coagulant, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large consumption and uneven dispersion of coagulant

Active Publication Date: 2009-12-16
上海艾晟特环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the higher the concentration, the more uneven the degree of dispersion of the coagulant in the water body, and the greater the consumption.

Method used

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  • Method and device thereof for secondarily diluting and feeding coagulant
  • Method and device thereof for secondarily diluting and feeding coagulant
  • Method and device thereof for secondarily diluting and feeding coagulant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 1 Shown is a kind of equipment for implementing the second dilution and dosing method of coagulant, including dilution tank 1, flocculation reaction tank 7, mixing device 6, infusion pipeline 4, infusion pump 2, diluent flow meter 3, and water pipeline 9. Regulating valve 11 and water flow meter 10; the infusion pipeline 4 starts from the dilution tank 1 and connects to the mixing device before the flocculation reaction tank 7 through the infusion pump 2 and the dilution liquid flow meter 3. The mixing device is a stirring mixing device 6 ; The water delivery pipeline 9 is connected to the position before the diluent dosing point 5 after the diluent flow meter 3 in the delivery pipeline 4 through the regulating valve 11 and the water flow meter 10; The length between the connection position of the pipeline 9 and the diluent dosing point 5 is 120D, that is, 3m.

[0021] Using the above equipment to implement the coagulant secondary dilution dosing method, the fir...

Embodiment 2

[0023] Such as figure 2 Shown is another kind of equipment that implements the coagulant secondary dilution dosing method. The mixing device adopts a pipeline static mixer 13; the inner diameter of the infusion pipeline 4 is φ=32mm, and the infusion pipeline 4 is from the position where the water delivery pipeline 9 is connected to the diluted The length between the liquid dosing points 5 is 100D, that is, 3.2m. The rest are the same as in Example 1.

[0024] Use the above equipment to implement the coagulant secondary dilution dosing method, control the mass concentration of the coagulant primary dilution to 5% during the primary dilution; the dilution water injection point for the secondary dilution is 3.2m before the dilution point 5, control The mass concentration of the coagulant secondary dilution is 0.5%. The rest are the same as in Example 1.

Embodiment 3

[0026] image 3 Shown is another kind of equipment that implements the coagulant secondary dilution dosing method, the inner diameter of the infusion pipeline 4 is φ=25mm, and the length of the infusion pipeline 4 from the position where the water delivery pipeline 9 is connected to the diluent dosing point 5 is 68D, that is, 1.7m; a static mixer 14 is provided after the connection position of the water delivery pipeline 9 in the infusion pipeline 4 and before the diluent dosing point 5 . The rest are the same as in Example 1.

[0027] Use the above equipment to implement the coagulant secondary dilution dosing method, control the mass concentration of the coagulant primary dilution to 10% during the primary dilution; the dilution water injection point for the secondary dilution is 1.7m before the dilution point 5, control The mass concentration of the secondary dilution of the coagulant is 0.8%. The rest are the same as in Example 1.

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Abstract

The invention relates to a method and a device thereof for secondarily diluting and feeding coagulant. The device comprises a diluting tank, a flocculation reaction tank, a mixing device, an infusion pipe, an infusion pump and a diluent flow meter, a water pipe, an adjusting valve and a water flow meter; the infusion pipe is connected to the flocculation reaction tank through the infusion pump and the diluent flow meter; and the water pipe is connected to the infusion pipe through the adjusting valve and the water flow meter. The primary dilution of the coagulant is finished in the diluting tank, and then the primary diluent is conveyed to a diluent feeding point by the infusion pump through the infusion pipe; simultaneously, the water for diluting is injected to the infusion pipe by the water pipe to realize secondary dilution of the coagulant; and the secondary diluent is fed to the water to be treated at the diluent feeding point, and undergoes a flocculation reaction in the flocculation reaction tank after full mixing so as to finish the purification treatment for the water. By implementing the method, the mass concentration of the coagulant is reduced to 0.5 to 2 percent through the secondary dilution, so that the utilization efficiency is improved, and the using amount is reduced.

Description

technical field [0001] The invention belongs to a water treatment technology, in particular to a method for adding a coagulant after secondary dilution in the water treatment process and corresponding equipment. Background technique [0002] Due to the strong dissolving ability of water, water is not only mixed with impurities such as mud sand and clay in the process of natural circulation, but also can dissolve various solids, liquids and gases. According to the needs of water treatment, the impurities in natural water can be divided into dissolved substances, suspended substances, colloids, dissolved organic polymer compounds and microorganisms. The main objects of drinking water treatment are colloids and suspended solids. Colloidal particles are generally less than 100 microns in size and negatively charged. They are quite stable in water and will not sink naturally after a long period of standing. The reason why the water is turbid is essentially the comprehensive expr...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 马学范杨曦帆陆颋浩
Owner 上海艾晟特环保科技股份有限公司
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