JPS58139922A - Transport apparatus for dangerous granular powder - Google Patents

Abstract

PURPOSE:To smoothly transport dangerous granular powder such as pulverized coal by utilizing exhaust gas by removing dust, water and the like from exhaust gas from an engine, and then supplying the exhaust gas to a discharge portion of a granular powder storing tank. CONSTITUTION:In transporting dangerous granular powder such as pulverized coal, the pulverized coal is first thrown from a manhole 29 in a tank 2, and a cart V loaded with a tank on its car body 1 is moved to the destination. In case of discharging the pulverized coal from the tank 2, a damp cylinder 3 is expanded to incline the tank 2, and then opening and closing valves 24, 25 are opened, and an opening and closing valve 23 is closed, whereby exhaust gas from an engine 5 of the cart V flows through an exhaust pipe 6, a conduit pipe 7 and a primary air feed pipe 8 in a discharge portion 4 of the tank 2, and the pulverized coal is mixed in the exhaust gas to be discharged to the outside. At this time, the exhaust gas is improved in quality by a water scrubber 10, a cooler 20, a cyclon 30, a heater 31 and so on.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for transporting hazardous powder and granular materials such as pulverized coal using engine exhaust gas.

In general, in a dust explosion, as the oxygen concentration decreases, the explosion pressure and pressure rise rate decrease, and eventually the substance loses its explosive properties. Furthermore, the critical oxygen concentration to prevent floating coal dust from escalating due to electric sparks is said to be 16% or less.

In this sense, it is effective to use vehicle engine exhaust gas to forcefully transport hazardous powder and granular materials.

However, the exhaust gas contains dust such as graphite, and if it is used as a compressed air source for granular materials while still containing dust F, the pulverized coal will deteriorate due to the dust, resulting in a decline in quality. In addition, when using an air slide canvas for pressure feeding, the canvas becomes clogged and becomes unusable, requiring frequent replacement of the canvas.

The present invention was developed in view of the above points, and the purpose is to reliably collect dust from engine exhaust gas and at the same time perform smooth pumping work.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings.

3 is a powder transport vehicle, in which a powder storage tank 2 is mounted on a vehicle body 1, and a dump cylinder 3 is interposed between the powder storage tank 2 and the vehicle body 1. is a discharge section formed at the lower part of the rear end of the powder storage tank 2, and the discharge section is not particularly provided with a canvas. Reference numeral 5 designates the engine of the powder transport vehicle V. One end of an inlet pipe 7 is connected to the middle of an exhaust pipe 6 of the engine 5, and the other end of the inlet pipe 7 is connected to a primary air supply pipe 8 and a secondary air supply pipe 8. It is connected to the discharge N4 via a supply pipe 9.

Reference numeral 10 denotes a water scrubber, which brings the introduced engine exhaust gas into contact with water in the water tank 11 to remove impurities from the exhaust gas.

17 is a back pressure air supply pipe, one end of which is connected to the introduction pipe 7, the other end of which is connected to the upper part of the powder storage tank 2, and an on-off valve 18 and a check valve 19 are interposed in the middle thereof. .

Note that 20 is a cooler interposed in the middle of the introduction pipe 7;
25, 24, 25, and 26 are on-off valves, 27 and 28 are check valves, 29 is a manhole, 30 is a cyclone, and 31 is a heater.

In the cram school 2, a heat exchanger as a heater 61 is installed in the water scrubber 10 and the heater tank 11, and the water temperature in the water tank 11 (always 80 to 85°C) is installed in the water scrubber 10 and the heater tank 11.
).

Therefore, the cooler 20, the cyclone 60 and -
The exhaust gas that has flowed into the heater 61 (approximately 40° 0) is heated by the heater 61 (approximately 80° 0) and then flows into the discharge portion 4 .

Next, to explain the operation of the present invention, first, after putting pulverized coal into the granular material storage tank 2 through the manhole 29,
Transport to destination. Next, when discharging pulverized coal from the granular material storage tank 2, the dump cylinder 6 is extended and the granular material storage tank 2 is tilted, and then the on-off valves 24 and 25 are opened, and the valves are closed for a while. 26 is closed to allow exhaust gas from the engine 5 to flow into the discharge part 4 via the exhaust pipe 6, the introduction pipe 7, and the secondary air supply pipe 8, and the pulverized coal is mixed into the exhaust gas and discharged to the outside. do. At this time, since a water scrubber 10, a cooler 20, a cyclone 30, a heater 61, etc. are sequentially installed in the middle of the introduction pipe 7, the coarse dust contained in the engine exhaust gas is first removed by the water scrubber 10. . Then, the temperature of the exhaust gas is lowered by the water scrubber 10 (550'o-
>80°0), and then further cooled by the cooler 20 (from 80°0 to 40°a), resulting in dew condensation with the fine dust as a nucleus, and the moisture and fine dust are removed by the cyclone 60. After that, the temperature is raised using the heater 61 (40°0 →
80° O), the moisture in the exhaust gas flowing out from the cooler 20 and becoming supersaturated due to natural air cooling is evaporated by the heater 51. Therefore, there is no possibility that the inner wall of the discharge part 4 is exposed to IV and the pulverized coal adheres and solidifies, thereby clogging the discharge part 4.

Note that when the pressure inside the powder storage tank 2 decreases, the on-off valve 18 is opened to allow exhaust gas to flow into the powder storage tank 2, thereby preventing the tank pressure inside the powder storage tank 2 from decreasing. .

As explained above, according to the present invention, when discharging dangerous powder particles such as pulverized coal, the dust in the engine exhaust gas is removed by the water scrubber, the temperature of the engine exhaust gas is lowered at the same time, and the engine exhaust gas is further cooled by the cooler 20. After lowering the absolute moisture content, the temperature is raised with a heater to evaporate the moisture in the exhaust gas, so the inner wall of the discharge part does not become clogged and close, and the pumping work can be carried out smoothly. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a 411 diagram showing one embodiment of the present invention, and FIG. 2 is a specific configuration diagram of the water scrubber and heater of the present invention.

Claims (2)

[Claims] (1) Connect one end of the introduction pipe to the discharge part of the powder storage tank, connect the other end of the introduction pipe to the exhaust pipe from the engine, and install a water scrubber, cooler, and heater in the middle of the introduction pipe. A device for transporting hazardous powder and granular materials that is sequentially interposed. (2) The apparatus for transporting hazardous powder and granular materials according to claim 1, wherein a cyclone is disposed between the cooler and the heater.