JPS6318071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for supplying gas to general consumers at low pressure using butane or other liquefied gas as a raw material.

(Prior art and its problems) Conventional gas supply is carried out by a device as shown in FIG.

That is, liquefied fuel such as butane is supplied from a storage tank 1 to a vapor riser mixer 3 by a pump 2, is gasified by a hot water heating type gas generator 4, and is made into a raw material gas, and the pressure is regulated by a pressure regulating valve 5. The gas is mixed with a predetermined amount of air in a ventilator tube 6 and stored in a water-type low-pressure gas holder 7.

In order to supply this stored gas to consumers, it is pressurized by a blower 8 and supplied at a predetermined gas pressure by a pressure regulating valve 9.

In this method, it is difficult to accurately define the mixing ratio of raw material gas and air, that is, the calorific value.

The blower 8 is always operated at maximum capacity, and when the demand is low, excess pressurized gas is circulated to the gas holder 7, which requires a large amount of electric power. The amount of water that accumulates in the water collector 11 installed in the tank increases, and it is necessary to perform water sampling work frequently.

In addition, large-capacity diesel generators are required to operate blowers and other power sources in case of power outages, which not only forces the power facilities to become larger, but also requires a large amount of money for safety measures because the gas is compressed. It costs money.

(Purpose) The present invention not only allows a desired accurate mixing ratio to be obtained using a relatively simple device, but also reduces the water content in the mixed gas, and eliminates the need for a gas supply blower, which was conventionally required. This provides a gas supply method that can save electricity, and since the blower is not needed, the backup power equipment attached to it can also be made unnecessary.

(Structure) The present invention supplies raw material gas and dehumidified pressurized air to be mixed with the same pressure to a mixer through an orifice having an aperture ratio proportional to a desired mixing ratio, thereby generating a predetermined amount of heat all at once. This system stores a pressurized mixed gas in a tank, reduces the pressure to 0.02 to 1.0 Kg/cm ² using a governor, and supplies it to end users. It has the advantage of not requiring a blower or other gas pressurization and pressure feeding equipment.

(Implementation equipment and operation) The equipment applied to the implementation of the present invention is as shown in ^FIG . introduced and gasified. 23 is a hot water heating type gas generator, 24 is a pressure regulating valve, and the pressure of the generated gas is regulated to 3.0 kg/cm ² .

On the other hand, the pressurized air for mixing is supplied by the compressor or blower 2.
5 to about 7 kg/cm ² , cooled and dehumidified by a cooler 26 , and this dehumidified pressurized air (dry air) is stored in a tank 27 . This dry air is reduced in pressure to a pressure equal to the pressure P ₁ in the gas supply pipe A on its secondary side by a pressure equalizing valve 28 provided in the supply pipe B.

That is, the diaphragm of the pressure equalizing valve 28 is connected to the conduit 29.
, a pressure P ₁ is applied, and this pressure changes the opening degree of the pressure equalizing valve 28 against the counter spring, so that the secondary side pressure P ₂ of the pressure equalizing valve 28 is always P ₁
is adjusted to be equal to

Gas orifice Ofa and air orifice Ofb
is a fixed orifice set to a diameter ratio proportional to the desired mixing ratio, e.g. 24:76. gas pressure
Since P ₁ and air pressure P ₂ are P ₁ = P ₂ , mixer 3
At 0, mixing is performed at the above set ratio and the tank 31
can be stored in Therefore, governor 3 is sent to each consumer.
2 is supplied through conduit 10 as 0.02 to 1.0 Kg/cm ² .

(Effects) As described above, according to the method of the present invention, the mixing amount of gas and air is determined only by two orifices whose diameters are set in proportion to the mixing ratio, so it is highly stable and This can be easily achieved with a single pressure equalization valve without introducing a complicated control system for pressure regulation. It goes without saying that a known pressure regulator can be used as the pressure regulating means.

Furthermore, since there is no need for a pressure feeder at the factory outlet, no electricity is required, and since the mixed air is once pressurized to become dry air, the amount of moisture that condenses in the conduit is extremely small.

In addition, even in the event of a power outage, the pump 2 can continue supplying the gas tank 31 for a short time.
Since only a small amount of electric power is required to drive the air compressor 25 and the air compressor 25, the power generation device can be small-scale.

In this case, since the material to be compressed by the compressor 25 is air, it is safe to directly connect a gas engine or the like as the motive force for the compressor, and efficiency is also good because no generator is involved. As mentioned above, the gas supply method of the present invention consumes much less power than the conventional gas supply method, which is not only economical, but also makes it easy and inexpensive to secure power during a power outage, so the entire device can be The economic efficiency of the system will be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of gas supply according to a conventional method, and FIG. 2 is a schematic diagram of an apparatus applied to the method of the present invention.

Claims (1)

[Claims] 1 In a method of supplying gas at low pressure using liquefied gas as a raw material, the gasified raw material gas and the dehumidified pressurized air for mixing, which is made equal to the gas pressure, each have an aperture ratio proportional to a predetermined mixing ratio. A gas supply method characterized by introducing the mixed gas into a mixer through an orifice, storing the mixed gas in the mixer at that pressure in a gas tank, and supplying the gas to each customer under reduced pressure through a governor.