Concentration basin step concentration polling-type automatic measurement device

Abstract

The invention relates to the field of concentration basin coal slime water measurement in coal washery and discloses a concentration basin step concentration polling-type automatic measurement device.The device is formed by a concentration basin, an A-layer coal slime water feed pipe, a B-layer coal slime water feed pipe, a C-layer coal slime water feed pipe, a D-layer coal slime water feed pipe,an E-layer coal slime water feed pipe, an A solenoid valve, a B solenoid valve, a C solenoid valve, a D solenoid valve, an E solenoid valve, a feed gathering pipe, a pump, a discharge vertical pipe,a discharge return pipe, a densimeter and an electric control device. A feed port of the pump is connected with the feed gathering pipe; the feed gathering pipe is connected with the A, B, C, D and Ecoal slime water feed pipes; and each feed pipe is equipped with one solenoid valve. Through cycle control of on / off states of the solenoid valves, density of coal slime water at different depths is measured indirectly, and the density is converted into a corresponding concentration value through corresponding calculation, thereby realizing measurement of concentration of the coal slime water at different depths. The automatic measurement device is stable and reliable, simple in structure, and high in degree of automation.

Description

technical field [0001] The invention relates to the field of measuring the concentration of slime water in a thickening pool used in a coal washing plant, in particular to a stepped concentration polling automatic measuring device for the thickening pool. Background technique [0002] The concentration link is very important in the slime water treatment process of the coal washing plant, and it is responsible for the collection, settlement and concentration of the slime water tailings of the entire coal washing plant, as well as the production accident slime water. The thickener is generally used as the main equipment of the thickening process in the coal washing plant. Its diameter is 30-50 meters, and the processing capacity is large. There are various types of thickening pools, but its cross-section is in the shape of an inverted trapezoid, with a narrow bottom and a wide top. The wall of the concentration pool is inclined at a certain angle. In the production process of...

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Problems solved by technology

[0003] During the production process of the thickener, it is necessary to monitor the concentration of slime water at different depths in the thickening tank in real time, because when the concentration of slime water in the thickening tank is low, it will increase the processing load of the subsequent filter press process, as well as the production load of the pump and the consumption of electric energy ; and when the concentration of slime water in the thickening tank is high, it is easy to cause the turbidity of the overflow water of the thickening tank, so that the overflow water cannot meet the requirements of the coal washing plant for circulating water, and the blockage of the slime water pipeline will lead to production accidents and excessive concentration At this time, due to the great increase of the resistance of the slime water, it will extremely cause the occurrence of "cracking" accidents, seriously affecting the normal production of the coal washing plant

At present, there is no suitable concentration online detection sensor for the detection of the concentration of slime water in the thickening tank. The detection of the concentration of the slimy water in the thickening tank basically relies on manually holding a long rod deep into the thickening tank, and qualitatively estimates the current by feeling the resistance encountered by the long rod. The concentration of slime water at a certain depth in the thickening tank cannot be quantified, and can only be qualitatively estimated at a certain depth, which cannot be monitored in real time, and the labor intensity is high, which increases the labor intensity of operators and work risks

[0004] With the development of science and technology and social progress, coal preparation design institutes, institutions of higher learning and related companies have begun to try to apply some new sensors to the measurement of the concentration of slime water in the thickener, such as turbidity meters. At the beginning, it was not designed for the concentration of slime water in the thickener of the coal preparation plant. It was directly applied to the measurement of the concentration of slime water in the thickener. The effect was poor, the measurement was inaccurate, and the reliability was low. Reliable and high-precision measurement of the concentration of slime water in each layer of the thickening tank of the coal preparation plant, and a step-by-step concentration polling measuring device for the thickening tank is proposed

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