High-accuracy as-fired coal sampling and weighing and checking integrated system and method

Abstract

The invention discloses a high-accuracy as-fired coal sampling and weighing and checking integrated system and method, and belongs to the technical field of as-fired coal sampling and measuring. The as-fired coal sampling and weighing and checking integrated system is composed of a coal sampling device, a coal splitting and returning unit, a weighing and checking unit and a computer control unit; the computer control unit controls the coal sampling device to conduct automatic coal sampling, a coal sample enters the coal splitting and returning unit, standby samples are increased after splitting and sample reserving are conducted through a splitting device, the standby samples are subjected to automatic packaging and then sprayed with two-dimensional codes for encryption, and therefore random inspection and checking can be conveniently conducted. A rejected sample enters the weighing and checking unit and is weighed in a weighing coal bunker and on a belt scale separately, and the computer control unit conducts weighing and checking on the belt scale according to a weight signal fed back from the weighing coal bunker. According to the high-accuracy as-fired coal sampling and weighing and checking integrated system and method, automation and accuracy from coal sampling to belt scale checking can be achieved, and a good technical reference is provided for completing automatic sampling work on as-fired coal and improving the measuring accuracy of the as-fired coal.

Description

technical field [0001] The invention belongs to a furnace coal sampling and metering system, in particular to an integrated system and method for high-precision furnace coal sampling, weighing and verification. technical background [0002] In the coal-fired production process of a thermal power plant, the cost of fuel accounts for about 80% of the total cost, so ensuring the quality and stability of the incoming coal is of great significance for maintaining the economic benefits of the power plant. The sampling link has a great influence on the error caused by the analysis results. Most of the existing furnace coal sampling devices are installed in the middle of the conveyor belt. During the operation of the belt, the sampling head regularly scrapes the coal from the belt and enters the shrinkage equipment. The sample is lifted back to the conveyor belt by the bucket elevator. However, the depth of the sampling head is not easy to control. If it is too deep, it will damage...

AI Technical Summary

Problems solved by technology

However, the installation of the chain code verification is more complicated, affected by various factors such as the tension of the conveyor belt, the friction between the chain code and the belt surface, and the resistance of the moving parts of the chain code, the error after the inspection cannot be guaranteed, and physical verification is required every year. , Most of the coal handling systems of the factories do not design the silos and inlets for physical verification, the verification work is difficult and the accuracy is difficult to guarantee

[0004] In order to solve the problems existing in the process of coal sampling and weighing verification in the coal conveying system, the present invention proposes a high-precision integrated system and method for coal sampling and weighing verification in the furnace. Regular automatic coal sampling solves the problem of uneven sampling and low representativeness of the above-mentioned coal sampling equipment

The weight signal fed back by the corresponding sensor received by the computer control system can complete the automatic weighing verification, which solves the problems of difficult work and unguaranteed errors in the chain code dynamic verification.

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