JPH10299995A - Continuous supplement type gas supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply gas temporarily in an emergency by providing branch piping between an intake check valve and a measuring emergency breaker of gas piping for individual demand houses, and a connecting a high-function gas storage container that can occlude and desorb a large quantity of fuel gas under specific pressure, to the branch piping through a pressure control valve. SOLUTION: City gas normally passes intake piping for demand houses from a main gas pipe (k) and is supplied to each gas appliance via an intake check valve (c), piping (a) and a measuring emergency breaker (b). At the time of emergency when city gas supply of the main gas pipe (k) is stopped due to a disaster or the like, city gas stored in a high-function gas storage container (e) is supplied to each gas appliance via a pressure control valve f2 , branch piping d2 , the piping (a) and the measuring emergency breaker (b). Further when the pressure of gas flowing in the piping (a) at the normal time is higher than the set value of a pressure control valve f1 , city gas flows to the gas storage container (e) via piping d1 and the pressure control valve f1 abreast with the supply of gas to each gas appliance, and the gas storage container (e) is always kept in a full state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fuel gas consumer such as a home, an office, a hospital, etc., when gas supply is stopped during a disaster or when gas supply is temporarily stopped due to gas piping work. The present invention relates to a system for temporarily supplying fuel gas for about one or two days.

[0002]

2. Description of the Related Art In the event of a temporary stoppage of fuel gas supply during a disaster such as an earthquake or short-term gas piping work, there is no special gas supply method. Inconvenience was inevitable.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a system for temporarily supplying gas to a fuel gas consumer in the case of construction or a disaster, and a consumption of about one or two days without requiring any special security equipment or maintenance. It is an object of the present invention to provide a system having a function of always storing an amount of fuel gas and waiting to be able to supply it when required, and a system having a function of automatically switching supply at a predetermined time without any special operation. I do.

[0004]

Means for Solving the Problems The present inventor utilizes a high-performance gas storage material capable of storing and releasing a large amount of fuel gas and a container filled with the storage material, and uses this in a gas piping system of individual consumers. The above problem was solved by using an embedded system.

That is, according to the present invention, a branch pipe (d) is provided between the individual customer metering / emergency circuit breaker (b) of the individual customer fuel gas pipe (a) and the intake check valve (c) for the individual customer. A high-performance gas storage container (e) capable of storing and releasing a large amount of fuel gas at normal pressure or a pressure not exceeding 10 kg / cm ² G is connected to the branch pipe via a pressure control valve (f). The present invention provides a temporary fuel gas supply system.

FIG. 1 shows an example of a temporary fuel gas supply system according to the present invention, in which city gas is supplied. The system will be described below with reference to this figure.

During normal times, city gas passes from the gas main line (k) through the intake pipe to the customer, passes through the individual customer intake check valve (c) located inside the boundary of the customer site, and becomes individual. Enter the city gas pipe (a) for the customer,
It is consumed by each gas appliance such as a boiler and a gas water heater through the emergency circuit breaker (b).

On the other hand, in an emergency, when the supply of city gas to the gas main is stopped due to a disaster or the like, the gas pressure in the pipe (a) drops, so that the city gas stored in the high-performance gas storage container (e) is The gas passes through the branch pipe (d ₂ ) via the control valve (f ₂ ), enters the individual customer city gas pipe (a), and is supplied to each gas appliance via the metering / emergency circuit breaker (b). In this case, the gas flowing out of the container (e) to the pipe (a) is stopped by the check valve (c), and does not flow back to the gas main pipe (k).

Further, in normal times, when the pressure of the gas flowing through the pipe (a) is higher than the set value of the pressure control valve (f ₁ ), the city gas is supplied to the pipe ( The gas flows through the gas storage container (e) via d ₁ ) and the valve (f ₁ ), is stored until the capacity of the storage container (e) is full, and is always kept full.

If the pressure of the gas flowing through the pipe (a) is lower than the set value of the pressure control valve (f ₂ ) even in normal times, the city gas stored in the gas storage container (e) becomes an emergency. As at the time, the gas flows out of the valve (f ₂ ),
₂ ) Through (a), it is supplied to each gas appliance (j) via the metering / emergency circuit breaker (b).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an individual customer metering / emergency circuit breaker (b) is one in which an emergency shutoff function is incorporated in a gas meter and is used for city gas and the like. It is a device that has a function of measuring and integrating the amount of gas used, and a function of automatically shutting off the gas supply automatically in the event of gas leaks from gas appliances or piping or forgetting to turn off the combustor. As long as it has both of the above functions, it includes all known functions.

In the present invention, the individual customer intake check valve (c) is a valve that separates the gas main pipe (k) from the individual customer piping (a) that supplies gas. However, in the past, a simple stop valve was used, but in the present invention, a check valve of a backflow prevention type is used, and the gas main pipe (k, gas pressure feed pipe) is bordered by the check valve (c). The check valve (c) is automatically closed when the pressure on the side becomes lower than the pressure on the customer side. This prevents the gas from flowing back to the main pipe when gas supply from the high-performance gas storage container (e) is started.

In the present invention, the high-performance gas storage container (e) is at normal pressure, that is, 0 kg / cm ² G (gauge pressure).
It has a function of absorbing a large amount of city gas at a gas pressure not exceeding 10 kg / cm ² G and releasing again. If the container has such a function,
All materials, shapes and structures are included in the present invention.

As a specific example, as described in claim 2, for example, a porous material (h) having a large specific surface area is filled in a gas storage container having a pressure resistance of 10 kg / cm ² G or less, and a fuel gas and a host gas are filled. -A host compound (g) constituting a guest relationship is injected and adsorbed on a porous material.

The mode of filling the gas container with the porous material coexisting with the host compound includes all types commonly used in the art such as a multi-tube type, a tray type and the like.

Specific examples of the porous material (h) having a large specific surface area include inorganic materials such as ceramics and activated clay.
Organic materials such as activated carbon are exemplified.

In particular, as described in claim 3, the activated carbon can be easily produced in various shapes such as powdery, granular, or fibrous ones called activated carbon fibers, or knitted fibers. It is particularly preferable because it can be obtained as a commercial product.

In the host compound (g) which forms a host-guest relationship with the fuel gas, some molecules are aggregated under the influence of the potential energy of the pores of the porous material, and form hydrogen bonds via hydrogen bonds. It is a compound capable of forming a certain kind of hollow three-dimensional structure, and has a function of forming an inclusion space such as a cage or a tube to occlude guest molecules. Specific examples include water, alcohols, organic acids, urea that can store lower hydrocarbons, and hydroquinone that can store rare gases.

In particular, as described in claim 3, water reacts with methane under appropriate conditions to form gaseous hydrate (methane hydrate), which is under the influence of activated carbon, in a cage-shaped inclusion space. Is particularly preferred since a large amount of lower hydrocarbons can be stored by forming

FIGS. 2, 3 and 4 show a comparison between a porous material using a pitch-based activated carbon having a specific surface area of 1765 m ² / g and a pore volume of 0.971 cm ³ and adsorbing water as a host compound. As a result, the results of occlusion of methane at a temperature of 30 ° C. at various pressures were shown for those for which water was not adsorbed. 0.9 hours after the start of adsorption from FIG. 2 (pressure 0.2 atm), the occluding material used in the present invention occluded 90 times more methane than the case without the host compound,
From FIG. 3, the storage material used in the present invention occluded methane more than ten times more in the vicinity of normal pressure than in the absence of the host compound. From FIG. 4, the methane gas adsorption pressure of the storage material used in the present invention was 10 kg / cm. It turns out that ² G or less is sufficient, and it turns out that the gas occlusion container (e) used in the present invention has a high function to achieve the above object.

In the present invention, the pressure control valve (f) is a valve provided at the gas inlet / outlet of the gas occluding device (e). Taking the city gas supply of FIG. 1 as an example, the pressure P of the city gas flowing through the individual customer city gas pipe (a) is as follows.
Valve when lower than the set pressure P ₂ of (f _2), feeding city gas in the gas adsorber (e) to the pipe (a), also the set pressure of city gas flowing in the pipe (a) is value P _This pressure control valve has a function of taking city gas from the valve (f ₁ ) into the gas occlusion device (e) when it is higher than ₁ (here, P ₂ ≧ P ₁ ). The valve (f) used in the present invention includes all types of pressure control valves known in the art as long as they have such a function.

In the present invention, the fuel gas to be applied includes all hydrocarbon gases used in the combustor. Specifically, it includes lower hydrocarbons such as methane and ethane, and petroleum gas, natural gas, and city gas mainly containing propane and butane.

[0023]

According to the system of the present invention, once a high-performance gas storage container is installed in each customer, the fuel gas consumed for about one or two days is always stored in the container in normal times. Therefore, gas can be supplied temporarily without installing a pipe or a gas tank in the event of a disaster or construction.

Since the internal pressure of the high-performance gas storage container used in the present invention does not exceed 10 kg / cm ² G, it can be always installed at each customer without being restricted by high-pressure gas safety regulations.

[0025]

[Brief description of the drawings]

FIG. 1 is a system diagram illustrating a continuous supply gas supply system of the present invention for supplying city gas to a household.

[0026]

FIG. 2 is a diagram showing a gas adsorption speed for an example of a high-performance gas storage material used in the present invention.

[0027]

FIG. 3 is a diagram showing a relationship between a gas adsorption amount and a gas pressure in a low pressure region for an example of a high-performance gas storage material used in the present invention.

[0028]

FIG. 4 is a diagram showing a relationship between a gas adsorption amount and a gas pressure in a high-pressure region for an example of a high-performance gas storage material used in the present invention.

[0029]

[Explanation of symbols]

 a: City gas piping for individual customers b: Metering / emergency circuit breaker for individual customers c: Intake check valve for individual customers d: Branch piping e: High-performance gas Storage container f: Pressure control valve j: Each gas appliance k: City gas main pipe m: Host compound adder

Claims (4)

[Claims] 1. A branch pipe (d) is provided between an individual customer metering / emergency circuit breaker (b) of an individual customer fuel gas pipe (a) and an intake check valve (c) for an individual customer, Normal pressure to 1
Temporary supply of fuel gas by connecting a high-performance gas storage container (e) capable of storing and releasing a large amount of fuel gas at a pressure not exceeding 0 kg / cm ² G to the branch pipe via a pressure control valve (f) system. 2. The high-performance gas storage container (e) is filled with a porous material (h) having a large specific surface area in which a host compound (g) forming a host-guest relationship with a fuel gas coexists. Item 4. The temporary fuel gas supply system according to Item 1. 3. The fuel according to claim 1, wherein the porous material (h) having a large specific surface area is activated carbon or ceramics, and the host compound (g) is water, alcohols, organic acids, urea or quinones. Temporary gas supply system. 4. The fuel gas stored in the gas storage container (e) is a natural gas mainly composed of methane or the like, or a petroleum gas mainly composed of propane or butane.
Or the temporary supply system of the fuel gas of Claim 3.