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System and method for automatic adding flocculant

An automatic flocculant addition technology, applied in separation methods, chemical instruments and methods, precipitation separation, etc., can solve the problems of lack of coal slime water concentration and flow feed-forward detection system, waste of water source and flocculant, etc., to achieve the improvement of clean coal Productivity, reduce overflow water concentration, save the effect of consumption

Inactive Publication Date: 2009-02-04
TAIYUAN UNIV OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The task of the present invention is to use a combination of computer and virtual instrument technology to control the system and method for automatically adding flocculants during the treatment of slime water in coal washing plants, so as to solve the problem of lack of coal in the process of coal slime water treatment in existing coal washing plants. The feed-forward detection system of muddy water concentration and flow rate, the hysteresis of the overflow concentration detection of the thickener, and manual valve control lead to the waste of water source and flocculant in the process of water-coal slime treatment, so as to save the amount of flocculant and increase the yield of clean coal , to reduce the concentration of overflow water, thereby providing an automatic flocculant adding system and method thereof

Method used

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  • System and method for automatic adding flocculant
  • System and method for automatic adding flocculant
  • System and method for automatic adding flocculant

Examples

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Embodiment approach 1

[0019] The specific embodiment of the automatic flocculant adding system of the present invention includes: a dosing part, a main pipe flow concentration detection part, a coal slime interface detection part, and a control part.

[0020] Example image 3 As shown in Fig. 4, the dosing part mainly includes: a three-phase motor 16, a metering screw pump 1, a medicine storage tank 2, a liquid level sensor 3, an electric ball valve, and a valve pipeline. The three-phase motor 16 and the metering screw pump 1 are a set of screw pumps composed of one or more sets. The metering screw pump 1 is the main pipe dosing pipe 10 connected with the medicine storage box 2 through the pipeline and the stop valve, and the metering screw pump 16 sucks the flocculant solution from the medicine storage box through the concentration tank dosing pipe 13 and the slime water feeding pipe 15 and Slime water mix. The capacitive liquid level sensor or the ultrasonic liquid level sensor 3 is used to mea...

Embodiment approach 2

[0026] The present invention is used for the addition method of flocculant automatic addition system, embodiment figure 1 In, at first detect the concentration and the flow rate of the coal slime water in the coal slime water feeding pipe 15 by the main pipe concentration meter 8 and the main pipe flowmeter 9, calculate the dry coal slime amount that will be added to the contained dry coal slime amount of the coal slime water in the thickening tank by the industrial control machine 4 How much, according to the amount of dry slime, control the frequency converter, the frequency converter controls the speed of the main pipe dosing motor 16, the main pipe dosing motor 16 drives the screw pump 1, the screw pump 1 discharges a certain amount of flocculant and is added by the main pipe dosing pipe 10 Into the coal slime water feeding pipe 15, that is, the feed-forward dosing part, forming a rough control of the flocculant. A liquid level sensor 3 and an electric ball valve 5 are ins...

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Abstract

An automatic flocculant adding system for treating the sewage in coal dressing plant is composed of a feeding tube with flowmeter and concentration meter, concentrating pool, a detecting instrument on the interface of said concentrating pool, flocculant storage tank with ball valve, pump and sensor, flocculant adding tube, industrial computer, and electric control cabinet. Its method features that when liquid level is lower, the ball valve is opened to add flocculant under the control of industrial control computer and when liquid level is higher, the ball valve is closed and the concentration of overflowed liquid is determined while it is determined by industrial control computer that if the flocculant is added.

Description

technical field [0001] The invention relates to a coal washing plant coal slime water treatment system and method thereof, in particular to a coal washing plant automatic flocculant adding system and method during the coal slime water treatment process. Background technique [0002] Coal slime water treatment is an important and complex production process in coal washing plants. In the treatment of coal slime water, people generally use the method of adding polymer flocculants to accelerate the purification and precipitation of coal slime water, so that the coal slime water can be reused. The goal is to save water resources and reduce costs. The flocculant addition is an important and complicated process. Whether the flocculant is added in time or not, and the amount of addition are directly related to the concentration of the slime water clarified liquid and the speed of clarification, and are directly related to the clean coal washed out by the coal washing plant. quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/01B01D21/34
Inventor 寇子明高贵军董宪姝吴娟卫进李军霞
Owner TAIYUAN UNIV OF TECH
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