JPH0554009B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a catalytic combustion device for treating gasoline vapor generated in the treatment of waste oil such as spilled oil at a gasoline filling station or the like.

[Conventional technology and its problems]

Such a catalytic combustion device catalytically burns hydrocarbons, and is constructed by, for example, providing a catalytic combustion chamber filled with catalytic fibers such as platinum in the middle of an air vent for vapor exhaust. On the inflow side, only a vapor inlet was formed.

However, the amount of gasoline vapor generated changes, and the amount sent to the catalytic combustion chamber is also not constant. Therefore, if concentrated gasoline vapor is sent into the catalytic combustion chamber all at once, it will exceed the processing capacity of the combustion chamber, and gas will be released in a state of incomplete combustion, causing pollution or causing ignition. or cause danger. Furthermore, the temperature inside the catalytic combustion chamber increases, which is dangerous and also accelerates the deterioration of the internal catalyst.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
An object of the present invention is to provide a catalytic combustion device that can maintain appropriate combustion performance by controlling the concentration of vapor sent into a catalytic combustion chamber.

[Means for solving problems]

In order to achieve the above object, the present invention provides that an air inflow path is connected to the gasoline vapor inflow path to the catalytic combustion chamber, and that the air inflow path is provided with means for controlling the amount of air inflow according to the vapor concentration. That is.

[Effect]

According to the present invention, by controlling the amount of air flowing from the air inflow path to the vapor inflow path, it is possible to control the concentration of vapor that passes through the vapor inflow path and enters the catalytic combustion chamber. It can be sent to the catalytic combustion chamber.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The figure is an explanatory view showing one embodiment of the catalytic combustion apparatus of the present invention, in which 1 is a gas station, and 2 is a gasoline refueling machine installed on the site of the gas station 1. A pit 4 with a drainboard 3 on the upper surface is formed on the floor in front of the refueling machine 2, and its bottom is connected to an oil-water separation tank 6 through an oil guide pipe 5.

On the other hand, an air vent 8 was connected to the end of the air supply path 7 communicating with the oil/water separation tank 6 and the pit 4.

This air vent 8 is stored with its tip protruding into an external small room on the side of the wall of the gas station 1, and there is a blower 9, a flame arrester (a wire mesh that prevents fire from passing through) 10, and a catalytic combustion chamber. 11 are provided in order from the bottom.

Of the air vents 8, one end of the air inflow path 13 is connected to a stage before the blower 9 of the gasoline vapor inflow path 12 which is the inflow side of the catalytic combustion chamber 11. A vapor concentration detector 14 was installed.

Furthermore, a valve 15 was provided in the air inflow path 13 as a means for controlling the amount of air inflow, the output of the vapor concentration detector 14 was introduced into a control device 16, and the output of the control device 16 was introduced into the valve 15. Further, the control device 16 outputs an output to the blower 9.

Next, the usage and operation will be explained. The control device 16 has a built-in timer, and turns on the blower 9 at the start and end of the service station 1.
Control off. Therefore, the blower 9 continues to rotate while the gas station 1 is open.

On the other hand, spilled gasoline and water from car washing are collected in the pit 4 and accumulated in the oil-water separation tank 6, but the generated gasoline vapor flows through the air supply path 7 into the vapor inflow path 12 of the air vent 8 by the action of the blower 9. The catalytic converter is then sent to the catalytic combustion chamber 11.

At that time, if the vapor concentration is higher than the specified value, the vapor concentration detector 14 detects this, and the control device 1
Output to 6. The control device 16 receives this output and outputs it to the valve 15 to open the valve. As a result, air is sent from the air inflow path 13 to the vapor inflow path 12 to dilute the gasoline vapor passing through the inflow path 12.

This prevents excessively concentrated gasoline vapor from flowing into the catalytic combustion chamber 11, resulting in a proper combustion effect.

In the above embodiment, the blower 9 was operated at a constant speed, but the rotation speed may be controlled by the control device 16.

〔Effect of the invention〕

As described above, the catalytic combustion device of the present invention has the following features:
The concentration of gasoline vapor flowing into the catalytic combustion chamber can be easily controlled, and there is no possibility that too much concentrated gasoline vapor will be sent into the catalytic combustion chamber and cause incomplete combustion.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the catalytic combustion apparatus of the present invention. 1... Gas station, 2... Gasoline refueling machine, 3...
Drainboard, 4... pit, 5... oil guide pipe, 6... oil/water separation tank, 7... air supply path, 8... air vent,
9...Blower, 10...Flame arrester,
DESCRIPTION OF SYMBOLS 11...Catalytic combustion chamber, 12...Gasoline vapor inflow path, 13...Air inflow path, 14...Vapor concentration detector, 15...Valve, 16...Control device.

Claims (1)

[Claims] 1. A catalytic combustion device, characterized in that an air inflow path is connected to a gasoline vapor inflow path into a catalytic combustion chamber, and the air inflow path is provided with means for controlling the amount of air inflow according to vapor concentration.