Pulverized coal discharging device for coal bed gas exploitation

Abstract

The invention discloses a pulverized coal discharging device for coal bed gas exploitation. A liquid injection assembly and a liquid discharging assembly are used for injecting anti-settling agent liquid into a pit, agent liquid facilitating pulverized coal dissolving is commonly adopted as the anti-settling agent liquid, pulverized coal can be well dissolved, and meanwhile discharging is ensured;the liquid injection assembly is used for injecting the anti-settling agent liquid into a pulverized coal anti-settling device in a pulse pressure manner, the liquid discharging assembly is used fordischarging the anti-settling agent liquid discharged by the pulverized coal anti-settling device, slurry can be discharged from liquid discharging holes in the pulverized coal anti-settling device, and pulverized coal dissolving and washing are achieved; and meanwhile, due to the fact that the diameter sizes of each set of liquid discharging holes are different, the flowing speeds of fluid flowing out of the liquid discharging holes are different, the flow is different, the liquid can better flow in the pit, and discharging of pulverized coal is better achieved. By means of the pulverized coal discharging device, multiple injection plates and liquid injection bag bodies are adopted, under the pulse pressure, stretching and contracting adjustment of the device can happen, in addition, dueto the fact that the flowing speeds of the liquid flowing out of the liquid discharging holes are different, the pressure is different due to deformation, the washing effect of the liquid on pulverized coal is ensured, and the discharging effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of similar material testing, and in particular relates to a pulverized coal discharge device for coalbed methane mining. Background technique [0002] During the exploitation of coalbed methane, if the quality of water discharged from the drainage well gradually turns black, it may indicate that the pulverized coal may be clogged or pulverized coal may have precipitated. In this case, if the coal powder settles in the pump barrel, it is easy to get stuck softly, resulting in a decrease in liquid discharge, unloading phenomenon in the down stroke, and severe shaking of the stroke hanger; , During the operation of the pumping unit, the downstroke current is small and the operation is fast, and the upstroke current is large and the operation is slow. The power diagram shows that the maximum load is larger than the normal value; if the coal powder is deposited on the valve seat, the pump will be lost. , resulti...

AI Technical Summary

Problems solved by technology

[0002] During the exploitation of coalbed methane, if the quality of water discharged from the drainage well gradually turns black, it may indicate that the pulverized coal may be clogged or pulverized coal may have precipitated. In this case, if the coal powder settles in the pump barrel, it is easy to get stuck softly, resulting in a decrease in liquid discharge, unloading phenomenon in the down stroke, and severe shaking of the stroke hanger; , During the operation of the pumping unit, the downstroke current is small and the operation is fast, and the upstroke current is large and the operation is slow. The power diagram shows that the maximum load is larger than the normal value; if the coal powder is deposited on the valve seat, the pump will be lost. , resulting in reduced liquid output and low pump efficiency, the leakage power diagram of the fixed valve shows that the lower left corner and the lower right corner are missing, the unloading of the down stroke is delayed, and the load is advanced in the up stroke

Therefore, in the process of mining coalbed methane, it is necessary to discharge the pulverized coal while ensuring the reliability of the discharge. The current discharge only relies on the way of pumping water. This method of pulverized coal is easy to cause precipitation and affects the discharge. Effect

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