Flying ash sampling device of electric dust remover

Abstract

The invention relates to a sampling device in the field of electrical energy sources and particularly relates to a flying ash sampling device of an electric dust remover, which is used for detecting the carbon content of flying ash of a boiler of a coal-fired power plant. According to the technical scheme, a hole is formed in a pipeline between an electric dust removing ash cabin and a cabin pump; a sampling barrel is inserted into the hole; through holes are formed in the wall of the sampling barrel; a packing auger is arranged in the sampling barrel in the axial direction; the packing auger is connected with a motor shaft at the outer side of the pipeline; a flying ash distributor is arranged between the motor and the pipeline; the flying ash distributor is connected with ash storage pots respectively by 2-5 pneumatic ball valves; the distributor is sleeved on the packing auger at the outer side of the pipeline; the motor and the pneumatic ball valves are controlled by a controller. The flying ash sampling device of the electric dust remover has the beneficial effects that the difficulty in sampling two-phase-flow solid grains is avoided and a novel sampling method for sampling the flying ash of a thermal power plant is provided; the overlapped area of a small hole of an outer barrel of a sampling gun and the gap of an inner barrel is changed to control the ash taking amount of the flying ash sampling device and continuously sample the flying ash of the boiler.

Description

technical field [0001] The invention relates to a sampling device in the field of electric energy, in particular to an electrostatic precipitator fly ash sampling device for detecting the carbon content of fly ash of a coal-fired power plant boiler. Background technique [0002] Solid incomplete combustion loss is one of the largest heat losses of coal-fired power plant boilers. Reducing the carbon content of fly ash is the main direction of energy conservation and emission reduction in thermal power plants. In order to obtain accurate data on the carbon content of fly ash, fly ash sampling It is the most critical work. At present, the main fly ash sampling methods in thermal power plants include fly ash constant velocity sampling, impact fly ash sampling, and self-priming fly ash sampling. Their respective advantages and disadvantages are as follows: [0003] 1. Fly ash isokinetic sampling device [0004] The fly ash constant velocity sampling device uses the principle of...

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Problems solved by technology

[0008] This sampling method uses the suction force generated by the negative pressure of the flue itself to suck the fly ash out of the flue. The advantage is that the fly ash can be sucked out without using external force. The disadvantage is that the sampling is not representative On the one hand, the reason is that its single-point sampling has poor representativeness of sampling, and on the other hand, it cannot achieve isokinetic sampling

[0009] The reason why the above methods are inaccurate in sampling is mainly due to the complexity of the gas-solid two-phase flow. It is very difficult to extract solid particles from the gas-solid two-phase flow with accuracy and representativeness.

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