Centralized control system of coal preparation plant

Abstract

The invention discloses a centralized control system of a coal preparation plant. The centralized control system is characterized by comprising a centralized control room and substations, wherein thesubstations communicate with the centralized control room, PLC (Programmable Logic Controller) cabinets are respectively installed in the centralized control room and the substations, an upper computer is installed in the centralized control room, lower computers which communicate with the substations are installed on the substations, and an equipment control schematic diagram in each PLC cabinetcomprises a fuse Fu, a breaker QL, a normally-closed protective contact KP, a first relay KM, a start button SF, a stop button SS and a module output second relay KC. Compared with the prior art, thecentralized control system has the following advantages that operating signals such as leakage alarm signals, start fault signals, electric signals, operating signals, shutdown signals and the like can be detected in real time, and current AI data of a motor (above 37 KW) and various material level and liquid level and bin level signals can be detected in real time.

Description

technical field [0001] The invention relates to a control system, and more specifically to a centralized control system in a coal washing plant. Background technique [0002] With the continuous development of the industry and the advancement of technology, the original design of the raw coal washing capacity of the coal preparation plant is becoming more and more insufficient. For example, the initial design of the raw coal washing capacity of a factory is 4 million tons per year, and it is 8 million tons after the technical transformation in 2005. / year, after more years of technical transformation, the ability to wash raw coal is getting stronger and stronger. At the same time, other supporting equipment is also being continuously improved, such as increasing the filter press workshop equipment, etc., while the system is constantly expanding, the centralized control system is also constantly improving. Expansion, which leads to the contradiction between the low transmiss...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the industry and the advancement of technology, the original design of the raw coal washing capacity of the coal preparation plant is becoming more and more insufficient. For example, the initial design of the raw coal washing capacity of a factory is 4 million tons per year, and it is 8 million tons after the technical transformation in 2005. / year, after more years of technical transformation, the ability to wash raw coal is getting stronger and stronger. At the same time, other supporting equipment is also being continuously improved, such as increasing the filter press workshop equipment, etc., while the system is constantly expanding, the centralized control system is also constantly improving. Expansion, which leads to the contradiction between the low transmission rate of the original PLC and the continuously increasing CPU system, which causes the CPU of the centralized control system to run unstable with the equipment, and the sudden failure rate is relatively common, and statistics show that there is an upward trend year by year

In addition, the number of technical transformations has led to inconsistent module specifications and models, and some modules have been discontinued and cannot be purchased

[0003] In addition, the current data transmission adopts GENIUS bus transmission, the data rate is only a few Mbps, and the maintenance of the control system is limited, which delays the effective time to deal with the problem to a certain extent

[0004] The degree of automation of equipment is low, and the risk of equipment operation is high. Many equipment cannot complete remote monitoring of equipment operation status

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