JP2004353834A - Box storage type membrane gas holder - Google Patents

Abstract

An object of the present invention is to store a bag made of a gas-tight and liquid-tight flexible membrane material in a rigid structure box at a factory and install it on site, thereby reducing the construction cost with a simple storage structure with good operability and increasing the number of units. The present invention also provides a box-storage type membrane gas holder which can be easily moved and has excellent durability and versatility.
A gas storage bag capable of taking in and out a gas formed of a bag made of a flexible film material having airtightness and liquid tightness in a rigid structure box made of a reinforced plastic material, a metal material, or the like. The gas storage bag is separated from each of the ceiling, the side wall and the bottom wall of the box, and the outer side of the gas storage bag is horizontally extended so that the gas storage bag can be expanded and contracted. It is supported around the middle part in the direction.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a biogas treatment facility for generating methane gas or the like from organic waste such as human waste, septic tank sludge, waste from livestock and fisheries facilities, and garbage, or a waste gas or low-pressure fuel gas from a steel mill or the like. The present invention relates to a box storage type membrane type gas holder applied to a storage facility or the like.
[0002]
[Prior art]
As a conventional membrane gas holder, there is, for example, an invention disclosed in Japanese Patent Application Laid-Open No. HEI 5-229592, "Structure of a balloon provided so as to be vertically movable in a tank".
This conventional invention attaches the periphery of a balloon made of a flexible material to a position substantially at the height of the center of the inner surface of the tank, prevents contact friction at the center of the top portion when the balloon is loosened, and furthermore, constantly measures. A disk made of a non-flexible material is attached to the center of the top to make it possible to reduce the installation space, and a rope connected to a balance weight is attached to the center of the disk. It is.
[0003]
Further, a “membrane gas holder” invented in view of problems such as durability and the construction cost of a conventional membrane gas holder is disclosed in Japanese Patent Application No. 2002-316336 (Patent Document 2). See).
The improved “membrane gas holder” has a structure in which a bag body having an upright flat bottom cylindrical dome shape is installed inside the outer shell of a flat bottom cylindrical storage tank structure.
[0004]
[Patent Document 1]
JP-A-5-229592 (FIG. 1 and page 2, right orchid lines 5 to 8; page 2 right orchid lines 18 to 23)
[Patent Document 2]
Japanese Patent Application No. 2002-316336 [0005]
[Problems to be solved by the invention]
The membrane-type gas holder of Patent Document 1 introduced above has a large balloon that partitions the upright cylindrical tank up and down and is large in weight, so that the tensile load on the flexible material due to repeated vertical movement and inversion is large, In addition, there is a concern that the load applied to the balloon fixing portion is large and the durability is reduced.
[0006]
Further, the membrane gas holder disclosed in Patent Document 2 requires a large space between the wall surface and the bag body so that the cylindrical bag body does not come into contact with the inner wall surface of the cylindrical shell so as not to be damaged. The space has become large, and a strong mounting structure has been required to maintain the sealing performance of the bottom mounting portion of the bag body. Furthermore, since the outer shell and the bag to be installed upright on the cylinder are assembled and installed locally, the construction is troublesome, the construction period is prolonged, and the equipment cost and the construction cost tend to increase.
[0007]
An object of the present invention has been made in view of the above-mentioned problems of the prior art, and stores a bag made of an air-tight liquid-tight flexible film material in a rigid box in a factory. A box storage type membrane with excellent durability and versatility, with a simple storage structure with good operability, low construction cost, easy addition and movement, by installing the box containing The present invention provides a gas holder.
[0008]
[Means for Solving the Problems]
The box storage type membrane gas holder according to the first invention is a bag made of a flexible membrane material having airtightness and liquid tightness in a rigid structure box made of a reinforced plastic material, a metal material, or the like. A structure for storing a formed gas storage bag capable of taking in and out the formed gas, wherein the gas storage bag is separated from each of the ceiling, the side wall and the bottom wall of the box, and the gas storage bag can be expanded and contracted. So that it is supported around the outer horizontal intermediate portion of the gas storage bag.
[0009]
Further, in the box type membrane gas holder according to the second invention, the box having the rigid structure has a rectangular parallelepiped shape, and the gas storage bag of the bag has a horizontal cylindrical shape or a spherical shell shape. A pipe member is mounted in a horizontal direction along a side wall surface at a predetermined height position in the inside, and a mounting member formed around an outer horizontal intermediate portion of the gas storage bag is mounted to the pipe member via an engaging material. It is what was held.
[0010]
Further, in the box storage type membrane gas holder according to the third aspect of the present invention, the connection between the gas storage bag and the piping such as the gas inlet / outlet and the drain vent is performed by forming a membrane cloth connection pipe with a flexible membrane material. The gas storage bag and the end of the membrane connection tube are bonded or welded together to fix the flange, and the end of the membrane connection tube on the piping side is fixed by a flange via a sealing material.
[0011]
Further, the box-holding type membrane gas holder according to the fourth invention is an annular weight balancer smaller than the outer peripheral shape of the gas storage bag provided on the upper surface of the gas storage bag with a reinforcing tape for holding the gas storage bag. Is mounted, and a counterweight is provided which hangs outside the box via a balance wire connected to the weight balancer, thereby always ensuring the operating pressure corresponding to a change in the gas storage amount.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a box storage type membrane gas holder according to the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional explanatory view in the case where the gas storage bag has a spherical shell shape, and FIGS. 2 and 3 show the case where the gas storage bag has a horizontal cylindrical shape and the position in the take-out direction of the nozzle is changed. (A) is a vertical sectional view seen from the side, (b) is a vertical sectional view seen from the front.
1 is a box having a rigid structure to be an outer shell, made of resin bonded or welded using a reinforced plastic material (FRP or the like) or panel bonded with bolts and nuts, or made of metal welded or panel bonded using a steel plate material or the like. It is formed in a rectangular parallelepiped shape including a bottom plate, side plates, and a ceiling plate having a rectangular planar shape.
The box having the rigid structure uses a container box 1, and has a gas-tight and liquid-tight flexible membrane material having a light weight and a tensile strength for accommodating gas inside an outer shell of the container box 1. To store the gas storage bag 2 formed in the bag.
This gas storage bag 2 is formed in a spherical shell shape in FIG. 1, and in FIG. 2 and FIG.
The gas storage bag 2 is separated from each of the ceiling, the side walls, and the bottom wall of the container box 1, and is provided at an outer horizontal intermediate portion of the storage bag 2 so that the gas storage bag 2 can expand and contract. The periphery is supported by the side wall of the container box 1.
A nozzle 3 such as a gas inlet / outlet is provided at the bottom of the gas storage bag 2.
[0013]
This container-type membrane gas holder is a finished product in which a gas storage bag 2 integrally formed in a bag body in a container box 1 in advance at a factory and a nozzle connecting member up to a first flange portion outside the container box are attached. This finished product is transported to the site by vehicle.
Then, at the site, it is only necessary to install the container box 1, and furthermore, it is only necessary to arrange a plurality of container boxes 1 side by side and connect or stack the pipes, so that the on-site work can be reduced, and Significant shortening is possible.
[0014]
The box-shaped container box 1 having a rectangular parallelepiped shape has a simple structure as an outer shell structure for protecting the membrane, and has a length of, for example, about 20 to 40 feet (6 to 12 meters) and a volume of 20 to 40 feet. By using a standard product of about 40 cubic meters or the like, the construction cost can be reduced. When the used container box 1 is used for other purposes such as transportation and storage, the waste product is effectively used, and the cost is further reduced and the economic efficiency is improved.
The box 1 may be a general-purpose JIS-compliant transport container box or the like.
As described above, when the container box 1 of a standard product that can be transported such as JIS standard is used, the container can be transported in a normal container transport vehicle, and can be appropriately moved and used according to the demand for gas. It is possible to easily replace a gas-used container box with a gas-filled container box at the place of use.
[0015]
The container box 1 is installed on a foundation in a raised floor type, and when the gas storage amount is increased, the container box 1 can be installed adjacently in parallel or stacked in multiple stages as needed.
In the case of the raised floor type shown in FIGS. 1 and 2 (a) and 2 (b), the pipe from the nozzle 3 is formed so as to be introduced into the bottom plate surface of the container box, and when the container boxes 1 are stacked, , As shown in FIGS. 3A and 3B.
[0016]
Further, the pipe member 4 is attached at a predetermined height position about the middle height of the container box 1 around a horizontal direction along the inner wall surface of the container box 1. The horizontal height position of the pipe member 4 is provided so as to face the mounting member 5 formed at the center height position of the gas storage bag 2.
The pipe member 4 is, for example, provided with a plurality of columns standing upright on a bottom wall and provided in a horizontal handrail shape on the columns, or directly mounted horizontally on the side wall surface, or supports from the side wall surface. Overhang and mount horizontally on this support.
[0017]
4 (a), 4 (b) and 4 (c) show a partially cut-away portion of the attachment member 5 formed at the middle portion of the gas storage bag 2 on the outside in the horizontal direction.
The mounting member 5 is formed outside the center of the gas storage bag 2 and around the middle part in the horizontal direction. The attachment member 5 is formed on a flare-shaped film end cloth 5A or a tab-shaped film end cloth 5B, and a plurality of perforated portions 6 are provided on the film end cloths 5A and 5B so as to be separated from each other.
The gas storage bag 2 shown in FIG. 3A is formed by welding two upper and lower membranes in a half-split cylindrical shape. The flared welded portion is used for the membrane end cloth 5A to make a hole. The case where the part 6 is provided is shown. Further, the gas storage bag 2 shown in (b) has a tab-shaped membrane end cloth 5B attached to the outer peripheral portion of the cylindrical body by welding or an adhesive, and a perforated portion 6 is provided on the membrane end cloth 5B. Is shown.
[0018]
4C, the perforated portion 6 of the mounting member 5 and the pipe member 4 are entangled with an engaging member 7 such as a synthetic fiber rope or a wire rope, and the gas storage bag 2 is cut. And hold it.
As described above, the mounting member 5 on the outer peripheral portion of the gas storage bag 2 is attached and held to the pipe member 4 by the engaging member 7, so that the gas storage bag 2 is prevented from rising and moving in a one-sided manner, and stably moves to the intermediate portion. Is held, and the film body above the intermediate position can be freely expanded and contracted, so that the film body does not come into contact with the inner wall surface of the container box, so that the film body does not suffer from frictional damage.
In addition, the gas storage bag 2 is stably held at the intermediate portion even when the vehicle is being transported to the site, and the film body does not come into contact with the side wall or the bottom wall of the container box 1. In addition, it is possible to prevent the membrane from being damaged, and it is possible to manufacture a finished product at a factory.
The mounting member 5 fixed to the pipe member 4 also has durability against repeated tensile loads caused by expansion and contraction of the gas storage bag 2 due to gas inflow and outflow during use.
[0019]
The gas storage bag 2 is formed in a spherical shell shape or a cylindrical shape into a sealed integral bag body using a flexible film material.
Since the bag body has a spherical shell shape or a cylindrical shape as described above, the tensile force generated by the internal pressure is received on the entire curved surface, so that the structure is resistant to tensile stress and repetitive stress caused by the internal pressure fluctuation.
Further, the film body of the bag body is made of a commercially available lightweight flexible film material having airtightness, for example, the vicinity of the horizontal center of the bag body is used as a joint between the upper and lower film cloths, and both ends of the film cloth are used. Heat-sealed in a flared shape to produce high-quality products without the risk of leakage, and can be manufactured easily and easily without the need for special joining members, with good workability, and with no labor. .
[0020]
The flexible film material forming the gas storage bag 2 is, for example, a sheet member formed of a synthetic resin material such as a polyolefin resin, an ethylene vinyl acetate resin, or a polyvinyl chloride resin, or a polyester fiber or a glass fiber. An air-tight and liquid-tight sheet body such as a cloth material coated with a synthetic resin such as the polyvinyl chloride resin is used for the fibers.
Since the gas storage bag 2 is stored in the container box 1, it is not exposed to sunlight or the outside air, so it is not deteriorated by ultraviolet rays, and prevents collapse of the membrane due to strong wind and damage due to flying objects. And safety and durability can be ensured.
[0021]
FIG. 5 shows an enlarged view of the gas storage bag 2, the inlet / outlet of the gas, and the connection of the nozzle 3 to the pipe 11 such as drainage.
The nozzle 3 forms the membrane cloth connecting pipe 8 with a flexible membrane material or the like, welds the gas storage bag 2 and the end of the membrane cloth connecting pipe 8 and fixes them with the flanges 9A and 9B. The end of the membrane cloth connecting pipe 8 to be connected is fixed with flanges 10A and 10B with a sealing material 12 interposed.
The flanges 9A and 9B are made of a lightweight synthetic resin material or the like so as not to damage the membrane, and if necessary, a sealing material or the like for improving airtightness is interposed.
In addition, an expansion joint or a flexible tube that absorbs and relaxes bending and displacement can be employed.
[0022]
As described above, by using the membrane cloth connecting pipe 8 for connection with the various pipes 11, the expansion and contraction behavior of the membrane caused by the fluctuation of the pressure in the stored gas is absorbed by the membrane cloth connecting pipe 8, and the membrane and the membrane are connected. It is possible to prevent fatigue cracks at the joint with the cloth connection pipe.
Further, since the membrane flange attachment portion and the end portion of the membrane cloth connection pipe are welded at the factory, and the flange 9A is attached and carried to the site, it is possible to prevent the flange portion from leaking, which is likely to occur at the site construction.
As described above, since the gas storage bag is integrally formed at the factory and the leak inspection is performed by attaching it to the first flange of various pipes, it is only necessary to install the container box 1 on site, and the on-site work is simple and the construction period is short. Can be shortened.
[0023]
FIGS. 6A, 6B, and 6C show examples of a structure in which an external pressure is applied to a stored gas.
An annular weight balancer 13 smaller than the outer peripheral shape of the gas storage bag provided with a reinforcing tape 14 for holding the gas storage bag 2 is placed on the upper surface of the gas storage bag 2, and a balance coupled to the weight balancer 13 is provided. A counterweight 16 is provided which hangs outside the container box 1 via a wire 15.
By using the weight balancer 13, the balance wire 15, and the counterweight 16, the gas storage bag 2 is moved up and down stably, and the internal pressure of the gas storage bag 2 is always kept constant in response to the fluctuation of the gas storage amount. Hold to maintain a predetermined operating pressure. The operating pressure is usually a relatively low pressure of 600 mm or less (2 kPa to 6 kPa) in a water column.
[0024]
The weight balancer 13 can change or adjust the operating pressure by changing the weight of the weight, and a level meter is provided on the counterweight 16 to measure the gas storage capacity from the outside according to the height position. be able to.
[0025]
In addition, the reinforcing tape 14 for pressing the upper surface of the gas storage bag 2 can maintain the balance of the annular weight balancer 13, reduce the tension generated in the upper membrane due to the internal pressure, and expand upward. Can be suppressed.
Further, a predetermined load corresponding to the operating pressure is always loaded on the membrane above the gas storage bag 2 by the weight balancer 13 and the counterweight 16, so that the predetermined operating pressure is ensured even when the gas storage amount is small. Also, the present invention can be applied to a gas production facility having an unstable gas generation amount, and a gas supply pump for exhausting stored gas is not required.
[0026]
【The invention's effect】
The box storage type membrane gas holder according to the first invention is a bag made of a flexible membrane material having airtightness and liquid tightness in a rigid structure box made of a reinforced plastic material, a metal material, or the like. A structure for storing a formed gas storage bag capable of taking in and out the formed gas, wherein the gas storage bag is separated from each of the ceiling, the side wall and the bottom wall of the box, and the gas storage bag can be expanded and contracted. So that it is supported around the middle part of the outside of the gas storage bag in the horizontal direction, against vibrations and shocks during expansion of the membrane due to fluctuations in the gas storage amount and internal pressure and during transportation of the vehicle to the site. Also, the film body does not come into contact with the inner wall of the container box, preventing frictional damage and breakage of the film body, and there is no fixed point that regulates the movement of the film body in the bulging and extending direction, so the circumferential direction Swelling Is uniform, it is not possible to concentrated load is applied to the film body, a strong structure in the inner pressure.
Also, as a finished product with a gas storage bag integrally molded in a bag in a factory in the factory, this finished product is transported to the site by vehicle, and the box only needs to be installed at the site. It is only necessary to connect a plurality of boxes side by side or to stack and connect them, so that the on-site work can be reduced and the construction period can be greatly shortened.
And since the gas storage bag is located in the box and is not exposed to sunlight or the outside air, it is not deteriorated by ultraviolet rays, and can prevent collapse of the membrane due to strong winds and damage due to flying objects, and Durability can be ensured.
Furthermore, when the film body of the bag body is made of a commercially available lightweight flexible film material having airtightness, and the film ends of the upper and lower films are welded in a flared shape near the horizontal center, the film ends from this film end. It is a high-quality product with no fear of leakage, etc., and can be manufactured easily, easily, with good workability and with no labor and economically without the need for special joining members.
[0027]
Further, in the box type membrane gas holder according to the second invention, the box having the rigid structure has a rectangular parallelepiped shape, and the gas storage bag of the bag has a horizontal cylindrical shape or a spherical shell shape. A pipe member is mounted in a horizontal direction along a side wall surface at a predetermined height position in the inside, and a mounting member formed around an outer horizontal intermediate portion of the gas storage bag is mounted to the pipe member via an engaging material. Since it is held, the rectangular parallelepiped box-shaped box has a simple structure as an outer shell structure that protects the membrane, and can be reduced in price by using standard products such as container boxes. When a general-purpose container box is used for the product, the waste product is effectively used, and the cost is reduced and the economic efficiency is improved.
In addition, when using a container container for transportation such as JIS standard, this container box can be appropriately moved according to the demand for gas using a normal vehicle for transporting the container, or the gas can be supplied at the demand destination. It can be easily replaced with a filled container box.
And, since the bag is placed in a horizontal cylindrical or spherical shell shape, the dead space in the box can be reduced as much as possible, and the tensile force generated by the internal pressure is received over the entire curved surface. The structure is resistant to stress.
To hold the membrane in the container, the pipe material attached to the side wall of the container and the attachment member at the center of the outside of the membrane are connected by an engaging material, and for example, holes are formed at appropriate intervals in the membrane end cloth of the attachment member. By opening the eyelet processing part after opening, and fixing the eyelet hole part and the pipe material with an engaging material such as a synthetic fiber rope, the expansion and contraction behavior of the membrane due to the fluctuation of the pressure in the stored gas is reduced. In addition, the membrane end cloth and the engaging material follow each other, so that the membrane is not damaged, and the safety can be enhanced even in the case of a high internal pressure.
[0028]
Further, in the box storage type membrane gas holder according to the third aspect of the present invention, the connection between the gas storage bag and the piping such as the gas inlet / outlet and the drain vent is performed by forming a membrane cloth connection pipe with a flexible membrane material. The gas storage bag and the end of the membrane cloth connection pipe are bonded or welded together to fix the flange, and the end of the membrane cloth connection pipe on the piping side is flange-fixed via a sealing material. By using the connecting pipe, the expansion and contraction behavior of the membrane due to the fluctuation of the pressure in the stored gas can be absorbed by the membrane connecting pipe, and the membrane can be prevented from being damaged.
In addition, since the welded portion between the gas storage bag and the end of the membrane cloth connection pipe is fixed with a flange, peeling of the membrane cloth at the welded part due to expansion of the membrane and the membrane cloth connection pipe due to fluctuations in the pressure in the stored gas is prevented. can do.
Furthermore, since the membrane flange attachment portion and the end portion of the membrane connection pipe are welded at the factory, and the flange is attached and transported to the site, it is possible to prevent the flange portion from leaking, which is likely to occur at the site work.
As described above, since the air leak inspection is performed by integrally molding the membrane of the bag body and mounting the various pipes to the first flange portion at the factory, only the installation and connection with the on-site pipes are required on site, and the work is simple. The construction period can be significantly reduced, and the economic efficiency can be improved.
[0029]
Further, the box-holding type membrane gas holder according to the fourth invention is an annular weight balancer smaller than the outer peripheral shape of the gas storage bag provided on the upper surface of the gas storage bag with a reinforcing tape for holding the gas storage bag. By placing a counterweight that hangs outside the box via a balance wire connected to the weight balancer, thereby always ensuring operating pressure in response to changes in the gas storage amount and providing an annular weight. Since the reinforcement tape is attached to the weight balancer, the weight of the weight balancer is evenly applied to the upper surface of the gas storage bag, so that the internal pressure of the gas storage bag can always be kept constant, and the weight due to the fluctuation of the gas storage amount can be reduced. The balance of the weight balancer can be maintained even when the balancer moves up and down.
Also, a predetermined load corresponding to the operating pressure is always loaded on the upper surface of the gas storage bag by the weight balancer and the counterweight, so that even when the gas storage amount is small, the predetermined operating pressure can be secured, and the gas generation amount can be secured. Can also be applied to gas production facilities that are unstable.
Further, by changing the weight of the weight of the counterweight, it is possible to easily change or adjust the operating pressure, and it is also possible to measure the gas storage capacity from the outer surface according to the height position by providing a level meter.
[0030]
[Brief description of the drawings]
FIG. 1 is an explanatory longitudinal sectional view showing an embodiment of a box storage type membrane gas holder according to the present invention, in which a gas storage bag has a spherical shell shape.
FIGS. 2A and 2B show a case in which a gas storage bag has a horizontal cylindrical shape, wherein FIG. 2A is a vertical sectional view viewed from a side, and FIG.
FIGS. 3A and 3B show another embodiment in which the nozzle position in FIG. 2 is changed, wherein FIG. 3A is a vertical sectional view viewed from the side, and FIG. 3B is a vertical sectional view viewed from the front.
FIGS. 4A and 4B are cross-sectional explanatory views showing, in an enlarged manner, the vicinity of a fixing portion of a mounting member formed at an intermediate portion in the outer horizontal direction of the gas storage bag, and FIG. 4C is a mounting member near the fixing portion; FIG. 4 is an explanatory view showing a state in which a perforated portion of the membrane end cloth is engaged with a pipe.
FIG. 5 is an explanatory longitudinal sectional view showing a nozzle portion.
6A and 6B show a situation in which pressure is applied using a weight balancer, wherein FIG. 6A is a plan view, FIG. 6B is a side view, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Box (container box) 2 Gas storage bag 3 Nozzle 4 Pipe material 5 Mounting member 5A, 5B Membrane end cloth 6 Perforated part 7 Engaging material 8 Membrane cloth connecting pipe 9A, 9B Flange 10A, 10B Flange 11 Piping 12 Sealing material 13 Weight balancer 14 Reinforcement tape 15 Balance wire 16 Counter weight

Claims (4)

A structure in which a gas storage bag formed of a bag made of a flexible film material having airtightness and liquid tightness and capable of taking in and out a gas is housed in a rigid structure box made of a reinforced plastic material, a metal material, or the like. The gas storage bag is separated from each of the ceiling, the side wall and the bottom wall of the box, and an outer horizontal intermediate portion of the gas storage bag so that the gas storage bag can expand and contract. Box-type membrane-type gas holder, which is supported around the box. The rigid structure box has a rectangular parallelepiped shape, and the gas storage bag of the bag has a horizontal cylindrical shape or a spherical shell shape, and a pipe material extends horizontally along a side wall surface at a predetermined height in the box. 2. A box storage type membrane type according to claim 1, wherein a mounting member formed around an outer horizontal intermediate portion of said gas storage bag is mounted and held on said pipe member via an engaging member. Gas holder. The connection between the gas storage bag and the piping such as the gas inlet / outlet and drainage is performed by forming a membrane connection pipe with a flexible membrane material, and bonding or welding the end of the gas storage bag and the membrane cloth connection pipe. 3. The box-type membrane gas holder according to claim 1, wherein the flange is fixed, and an end of the membrane connection pipe on the piping side is flange-fixed via a sealing material. On the upper surface of the gas storage bag, an annular weight balancer smaller than the outer peripheral shape of the gas storage bag provided with a reinforcing tape for holding the gas storage bag is placed, and via a balance wire coupled to the weight balancer. 4. The box-stored membrane gas holder according to claim 1, wherein an operating pressure is always maintained in response to a change in gas storage amount by providing a hanging counterweight outside the box.

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