Device for safely storing CNG (compressed natural gas)

Abstract

The utility model discloses a device for safely storing CNG (compressed natural gas), which belongs to the technical field of natural gas storage and comprises a vertical tank and a horizontal tank, the bottom of the vertical tank is welded with the top of the horizontal tank, and the vertical tank and the horizontal tank are internally communicated. A vertical well is formed on the periphery of the vertical tank, and a horizontal well is formed on the periphery of the horizontal tank; a safety operation mechanism is arranged at the top of the vertical tank; according to the utility model, the vertical tank and the horizontal tank which are made of 16Mnr special steel are combined and welded, the outer wall of the tank body adopts three-PE (Poly Ethylene) for corrosion prevention, and the foundation at the periphery of the tank body is mounted by tamping and wrapping concrete, so that the mounting cost and the manufacturing cost are effectively reduced and are only 20% of the manufacturing cost of similar products; according to the utility model, the vertical shaft device is reasonably added, the reserve is greatly increased, the purpose of quantity storage peak regulation is completely realized, and the economic benefits of operators are increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas storage technical field especially relates to a device of safe storage of CNG gas. BACKGROUND

[0002] The storage mode of CNG mainly includes high-pressure storage, and is usually stored in a storage tank with a working pressure of 20MPa. The existing storage mode is a CNG high-pressure gas cylinder group, an LNG storage tank and a high-pressure underground gas storage well.

[0003] Among them, the CNG high-pressure gas cylinder group one, due to the ground installation form, the characteristics of high-pressure gas, cause the equipment must choose special material steel, and select the winding and the like measures. Therefore, the manufacturing cost is very high, and the investment is too large. In addition, such device, there is a great security risk, therefore, the related facilities matched with it on site must also meet the sufficient installation distance. Thus, the land occupation area is too large, and the storage capacity is very limited, and it is difficult to realize the purpose of storage regulation.

[0004] The LNG storage tank can meet the relative storage, but also because the material and process requirements are too high, so as to lead to the cost being too large; the installation distance on site is also the same as the above device, so the land occupation area is also very large; the investment cost is too large, and it is difficult to realize the economic benefits.

[0005] The high-pressure underground gas storage well must increase the depth to realize the storage purpose, so the facility detection difficulty is increased; at the same time, because the depth is too large, the construction cost is too large.

[0006] In order to solve the above problems, a device for safe storage of CNG gas is provided. UTILITY MODEL CONTENTS

[0007] The main purpose of the utility model is to provide a device for safe storage of CNG gas, which solves the problems mentioned in the background technology.

[0008] The purpose of the utility model can be achieved by adopting the following technical scheme:

[0009] A device for safe storage of CNG gas, comprising a vertical tank and a horizontal tank, the bottom of the vertical tank is welded with the top of the horizontal tank, and the interiors of the two are communicated;

[0010] The vertical tank is formed with a vertical shaft around, and the horizontal tank is formed with a horizontal shaft around;

[0011] The top of the vertical tank is provided with a safety operation mechanism.

[0012] Further, the vertical tank and the horizontal tank are both made of 16Mnr special steel pipe, and the diameter is 500mm.

[0013] Further, the vertical tanks are arranged on the horizontal tanks, and the adjacent vertical tanks are spaced 5m apart, and the horizontal tanks are arranged in groups of 50m, and the horizontal groups are spaced 5m apart.

[0014] Further, the vertical shafts and the horizontal shafts are rammed earth layers, and are internally filled with steel components for fixing the vertical tanks and the horizontal tanks.

[0015] Further, the vertical shafts are 5-6m deep.

[0016] Further, the vertical shafts are 5-6m deep.

[0017] Further, the safety operating mechanism is a tank opening operating valve group, and a communication pipe is detachably installed on the spherical sealing caps at the two ends of the horizontal tank, and the communication pipe is in a U-shaped structure.

[0018] The beneficial technical effects of the utility model are as follows:

[0019] The vertical tank and the horizontal tank made of 16Mnr special steel are combined and welded, and the tank body outer wall is provided with three PE anti-corrosion layers, and the tank body peripheral foundation is wrapped and installed by rammed earth, so that the installation cost and the manufacturing cost are effectively reduced, and the manufacturing cost is only 20% of that of similar products.

[0020] The vertical shaft device is reasonably increased, the storage capacity is greatly increased, the purpose of quantity storage peak regulation is completely achieved, and the economic benefits of the operator are increased.

[0021] Since the depth of the vertical shaft in the device is only between 5-6m, great convenience is brought to detection, safety controllability is increased, and construction difficulty is reduced.

[0022] The device is installed underground, the safety factor is increased, the installation distance from related equipment is reduced, and the occupied area is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a preferred embodiment of the connection structure of the horizontal tank and the vertical tank in the device for safely storing CNG gas according to the utility model.

[0024] Fig. 2 It is a preferred embodiment of the installation of the horizontal tank and the vertical tank in the base soil layer in the device for safely storing CNG gas according to the utility model.

[0025] The reference signs are explained as follows:

[0026] Horizontal tank; 2, vertical tank; 3, tank opening operating valve group; 4, base soil layer; 5, vertical shaft; 6, horizontal shaft; 7, communication pipe. Detailed Implementation

[0027] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0028] like Figs. 1-2 As shown, this embodiment provides a device for safely storing CNG gas, including a vertical tank 2 and a horizontal tank 1. The bottom of the vertical tank 2 is welded to the top of the horizontal tank 1, and the two are internally connected. A vertical well 5 is formed around the periphery of the vertical tank 2, and a horizontal well 6 is formed around the periphery of the horizontal tank 1; a safety operating mechanism is provided on the top of the vertical tank 2.

[0029] The vertical tank 2 and the horizontal tank 1 were welded using the gas steel pipe welding process.

[0030] Both vertical tank 2 and horizontal tank 1 are constructed using 16Mnr special steel pipes, each with a diameter of 500mm. They are also protected against corrosion using PE (polyethylene) coatings to enhance their durability in underground soil. 3PE anti-corrosion material is a three-layer polyethylene (3PE) anti-corrosion coating primarily used for the external corrosion protection of metal pipelines. Its structure includes an epoxy powder coating as the base layer, an adhesive layer as the middle layer, and an outer polyethylene coating. This structure gives 3PE anti-corrosion material excellent corrosion resistance, water vapor permeability resistance, and mechanical properties, making it widely used in industries such as oil pipelines.

[0031] Several vertical tanks 2 are set on horizontal tanks 1, with a 5m interval between adjacent vertical tanks 2. The horizontal tanks 1 are set in groups of 50m. The number of groups of horizontal tanks 1 is determined according to the site conditions, with a 5m horizontal interval between each group.

[0032] Both vertical shaft 5 and horizontal shaft 6 are made of rammed earth, and steel components for fixing vertical tank 2 and horizontal tank 1 are buried inside. Compared with the traditional high-pressure underground gas storage wells which use concrete encapsulation, the rammed earth layer has the effect of reducing construction costs.

[0033] The depth of vertical shaft 5 is 5-6m. The shallow shaft facilitates safety inspection and reduces construction difficulty. At the same time, in conjunction with the horizontal shaft 6 at the bottom, it can increase the storage capacity and fully realize the purpose of quantity storage and peak shaving.

[0034] The soil layer 4 is located between shaft 5.

[0035] The safety operating mechanism is the top of the operating valve group at the tank opening. The connecting pipe 7 is detachably installed on the spherical sealing caps at both ends of the horizontal tank 1. The operating valve group consists of common valve components such as inlet valve, shut-off valve, control valve, and outlet valve. The connecting pipe 7 is used to connect adjacent horizontal tank groups. The connecting pipe 7 has a U-shaped structure and can withstand 200KG pressure.

[0036] The working principle of the device: during the construction and installation, the horizontal tank 1 is laid in the ground with a top pipe machine with an arc, and the wall of the horizontal tank 1 needs to be treated with three PE anticorrosion. The vertical tank 2 is fixed by artificial hole digging, and the bottom is communicated with the inside of the horizontal tank by welding, and the welding process adopts gas steel pipe welding process. The tank opening operation valve group top of the vertical tank 2 adopts a molded factory detection product, which realizes functions such as filling, releasing, detecting, safety cutting and the like. The steel material buried part for fixing structure adopts three PE anticorrosion treatment, and is filled and buried with three soil.

[0037] With the above structure, the safety operation and safety controllability can be realized, which is obviously better than various devices used in the current market, and the safety controllability is realized by using ordinary detection means; the storage capacity is better than the similar devices, and the peak regulation effect is achieved, and the storage capacity can be increased at any time according to the needs, which is small to several million cubic meters of NG and large to several hundred million cubic meters, so that the economic benefits of peak regulation are realized; compared with the similar devices, the manufacturing and installation costs are saved, and the investment is saved by 70-85% compared with the similar devices.

[0038] The above is only a further embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the scope disclosed by the present application, which belongs to the protection scope of the present application.

Claims

1. A device for safe storage of CNG gas comprising a vertical tank (2) and a horizontal tank (1), characterized in that: The bottom of the vertical tank (2) is welded with the top of the horizontal tank (1), and the interiors of the two are communicated; The vertical tank (2) is peripherally shaped with a vertical shaft (5), and the horizontal tank (1) is peripherally shaped with a horizontal shaft (6); The top of the vertical tank (2) is provided with a safety operation mechanism.

2. A device for safely storing a quantity of CNG gas as claimed in claim 1 wherein: The vertical tank (2) and the horizontal tank (1) are both made of 16Mnr special steel pipe, and the diameter of each is 500mm.

3. A device for safely storing a quantity of CNG gas as claimed in claim 2 wherein: The vertical tank (2) is provided on the horizontal tank (1) in several, and the adjacent vertical tanks (2) are spaced 5m apart, and the horizontal tank (1) is provided as a group of 50m, and each group is spaced 5m apart.

4. A device for safely storing a quantity of CNG gas as claimed in claim 3 wherein: The vertical shaft (5) and the horizontal shaft (6) are both rammed three-layered soil, and the interiors are filled with steel components for fixing the vertical tank (2) and the horizontal tank (1).

5. A device for safely storing a quantity of CNG gas as claimed in claim 4 wherein: The depth of the vertical shaft (5) is 5-6m.

6. A device for safely storing a quantity of CNG gas as claimed in claim 5 wherein: The vertical shaft (5) is a base soil layer (4).

7. A device for safely storing a quantity of CNG gas as claimed in claim 6 wherein: The safety operation mechanism is a tank opening operation valve group, and a connecting pipe (7) is detachably installed on the spherical plugging cap at the two ends of the horizontal tank (1), and the connecting pipe (7) is a U-shaped structure.

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