A raw coal push-pull coal hopper sampling device and coal storage system

Abstract

The invention discloses a raw coal push-pull type coal hopper sampling device and a coal storage system, comprising a sampling channel arranged in the middle of the coal storage device, the upper and lower end surfaces of the sampling channel are respectively provided with upper and lower sealing plates, and the upper sealing plate There is a gap in the middle of the plate, which can make the coal sample fall; there is a guide rail between the upper and lower sealing plates, and a sampling box is movable on the guide rail, and the sampling box moves along the guide rail between the upper and lower sealing plates, so that the falling coal The sample is delivered to the outside of the sampling channel. The invention ensures that when the device is in operation state, the raw coal will not blow out of the sampling bag uncontrollably, which greatly improves the working environment of sampling.

Description

technical field [0001] The invention relates to a raw coal push-pull coal hopper sampling device and a coal storage system. Background technique [0002] In the thermal test process of power plant boilers, raw coal sampling is an important link. Accurate sampling of coal can provide real coal quality data for the subsequent calculation of various performance indicators. When conducting boiler performance tests, the national standard GB10184-2015 requires fuel sampling: "Sampling should be taken from the flowing solid material flow. If there is more than one feeding port, samples should be taken at equal intervals at each feeding port." The current raw coal sampling locations mainly include coal feeding belt and coal feeder. The best position to take coal is at the coal feeder hopper, such as figure 1 As shown, the current coal measuring points are very simple, often open directly at the coal hopper, weld the coal outlet pipe, and then use a flange or a ball valve as a swit...

AI Technical Summary

Problems solved by technology

[0004] 1. For the measuring points sealed by flanges, the flanges need to be removed when taking coal. However, due to the positive pressure there, once the flanges are removed, the raw coal will not stop gushing out. Not only is it difficult to seal it again, but also The exposed raw coal has seriously affected the surrounding sanitation

[0005] The second is that for the coal sampling point closed by the ball valve, due to the large raw coal particles, the problem of pipe blockage is prone to occur, and the coal cannot be extracted often.

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