JPS60191844A - Washing device in carrier vehicle for dangerous granular material - Google Patents

Abstract

PURPOSE:To facilitate washing for a purifying device for a cooler, by providng a selector valve in the intermediate part of an introduction pipe communicating between a water tank in a water scrubber and the purifying device, and as well by enabling eithr one of exhaust gas and high temperature water to be selectively fed to the downstream side of the selector valve. CONSTITUTION:When pulverized coal is discharged from a pulverized coal storage tank 2, exhaust gas from an engine 5 is introduced from an introduction pipe 7 into a discharge section 4 through a primary air supply pipe 8 by way of an water scrubber 10, a cooler 13, a cyclone 14 and a heater 15 after tank 2 is tilted by means of a dump cylinder 3 and therefore, pulverized coal is mixed into exhaust gas and then is discharged to the outside. If accumulation of carbon, oil mist, etc. is progressed in a purifying device during the above-mentioned discharging step and the washing of the purifying device is required, high temperature water in a water tank 12 in the water scrubber 10 is introduced from a pipe line 30 with the use of the pressure of exhaust gas so that the high temperature water flows through the cooler 13, the cyclone 14 and the heater 15 in the mentioned order to dissolve adhered substances, and then the water and the substances are discharged through a selector valve 21.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a cleaning device for a hazardous powder transport vehicle that uses engine exhaust gas to pump hazardous powder and granular materials such as pulverized coal.

(Prior Art) Conventionally, transport vehicles have been known that use engine exhaust gas to pump hazardous powder and granular materials in order to avoid dust explosions. At that time, dust such as graphite containing exhaust residue r-PK should be removed with a water scrubber, or carbon and oil mist that is not collected by the water scrubber may adhere to the inside of equipment such as tarps and heaters, reducing exhaust performance. It turns out. Although cleaning is carried out regularly to eliminate this problem, the device has to be disassembled each time, which has the drawback of requiring a great deal of effort for cleaning.

(Purpose) The present invention is intended to solve the above problems, and
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A cleaning device for dangerous powder and granular material carriers that can easily clean carbon, oil mist, etc. adhering to the inside of the purification device using the following formula: It provides:

(Configuration) A switching valve is installed in the middle of the introduction pipe leading from the water tank of the water scrubber to a purification device such as a cooler, and exhaust gas or high temperature water from the water tank can be selectively supplied to the downstream side of the VC! It was completed.

(Example) Examples of the present invention will be described below with reference to the drawings.

2 is a powder/granular material transport vehicle, and a powder/granular material storage tank 2 having a manhole is mounted on the vehicle body 1.
A dump cylinder 6 is interposed between the front part of the vehicle and the vehicle body 1.

Reference numeral 4 denotes a discharge section formed at the lower rear end of the powder storage tank 2, and no campus is provided in the discharge section. Reference numeral 5 designates the engine of the powder transport vehicle V, and an exhaust pipe 6 of the engine 5 is connected to one end of an introduction pipe 7 in which an exhaust gas cleaning device 10, which will be described later, is interposed.
The other end of the introduction pipe 7 is connected to the discharge section 4 via a primary air supply pipe 8 and a secondary air supply pipe 9.

In the middle of the supply pipes 8 and 9, there are switching valves 19 and 20.
In addition, valves 22 and 23 are interposed.

24 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 a switching valve 25 and a check valve 26 are interposed between the pipes. There is.

The exhaust gas purification device 10 is a water purification device 11.
, Cooler 16. Cyclen 14. The water scrubber 11 is configured by connecting the heaters 15 in sequence, and the water scrubber 11 is capable of removing impurities in the exhaust gas by bringing the introduced engine exhaust gas into contact with the water in the water tank 12. A heater 15 is installed in the water tank 12.
A heat exchanger is installed.

Reference numeral 28 denotes a switching valve that can be selected between a pressure feeding position for supplying exhaust gas to the powder storage tank 2 and a cleaning position tilt for cleaning the purification device 10. When the switching valve 28 is in the pressure feeding position, the water tank 12 Exhaust gas is piped from the top 27.
29 to the cooler 16, and when it is in the cleaning position 16, high temperature water is piped from the bottom of the water tank 12 through piping 30.29.
They are each guided to the cooler 16 through them.

In addition, a switching valve 21 is also interposed at the tip of the introduction tZ.

(Explanation of operation) Next, to explain the operation of the present invention, when discharging pulverized coal from the granular material storage tank 2, the dump cylinder 6 is extended, the granular material storage tank 2 is tilted, and the pulverized coal is Afterwards, the switching valves 19 and 20 are opened, while the switching valve 21 is closed to direct the exhaust gas from the engine 5 to the exhaust pipe 6. Introductory tube7. −
Next, the pulverized coal is caused to flow into the discharge part 4 through the air supply pipe 8, and the pulverized coal is mixed into the exhaust gas and discharged to the outside. At this time, the guide 7 Hakayama W I→mt Matsuwaka 1n Sukah Todai Parable-
Task Lover 10. Cooler 16. Since the cyclone 14 and the heater 15 are installed in sequence, the coarse dust contained in the engine exhaust gas is first removed by the water scrubber 10.
It is deleted by. Then, the temperature of the exhaust gas is lowered by the water scrubber 10 and then further cooled by the cooler 13, resulting in dew condensation with the fine dust as a core, and the moisture and the fine dust are removed by the cyclone 14. Thereafter, the temperature is raised by the heater 15, so that the moisture in the exhaust gas that has flowed out from the cooler 16 and has become supersaturated due to natural sudden cooling is evaporated by the heater 15.

In addition, if the pressure inside the powder/granular material tank 2 drops, the switching valve 25 is opened to allow exhaust gas to flow into the powder/granular material storage tank 2 to prevent the tank pressure in the powder/granular material storage tank 2 from decreasing. It can be prevented.

As described above, while the pressure-feeding operation is repeated, carbon and oil mist that cannot be collected by the water scrubber 11 or the cyclone 14 gradually accumulates in the purification device vt, 10.

As a result, if it is necessary to clean the inside of the purification device 10, first open the switching valve 21, then open the switching valve 19,
21. ], 25 and 17.18 are "closed". Next, after switching the switching valve 28 to the cleaning side, the engine 5 may be started. As a result, the exhaust gas is discharged into the water tank 12 of the water scrubber 11, and the discharge pressure causes the high temperature water in the water tank 12 to flow into the pipe 6.
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The cooler 16° cyclone 14. It flows into the purification device 10 of the heater 15, dissolves adhering dust such as carbon and oil mist, and is discharged from the switching valve 21.

When all of the 1% hot water in the water tank 12 is discharged from the switching valve 21, the engine 5 is stopped and the switching valves 17 and 18 are released.
The cleaning work is completed by opening the water scrubber 11 and draining the remaining water from the cyclone 14.

(Effects) As described above, according to the present invention, it becomes possible to clean the purification device u with a simple operation of adding a switching valve and piping to the purification device and switching the switching valve to the cleaning position. There is no need to disassemble the purification device one by one.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. 2... Powder storage tank, 4... Discharge section, 5...
... Engine, 6 ... Exhaust pipe, 7 ... Inlet pipe, 11 ... Water scrubber, 16 ... Cooler, 15 ... Heater, 28 ... Switching valve . ” Applicant ShinMaywa Industries Co., Ltd.

Claims (1)

[Claims] An exhaust gas purification system in which one end of an introduction pipe is connected to a discharge part of a powder storage tank, the other end of the introduction pipe is connected to an exhaust pipe from an engine, and at least a water scrubber and a heater are provided in the middle of the introduction pipe. In a vehicle for transporting hazardous powder and granular materials, which is equipped with equipment, downstream of the water scrubber, there is a pressure feeding position for supplying exhaust gas to the powder storage tank, and a cleaning position for cleaning the purification device. A selectable switching valve is disposed in the switching valve, and when the switching valve is in a pressure-feeding position, the exhaust gas is forced downstream through a pipe provided at the upper part of the water tank of the water scrubber, and the switching valve Cleaning of hazardous powder and granular material carriers configured to guide high-temperature water in the water tank downstream from the switching valve through piping installed at the bottom of the water tank when the vehicle is in the cleaning position.