Buried compressed natural gas storage well

Abstract

The utility model relates to a buried compressed natural gas storage well which comprises a ground main body, a gas storage well assembly and an equipment box, and the gas storage well assembly and the equipment box are arranged on the ground main body. According to the buried compressed natural gas storage well, the circulating cooling mechanism is arranged, cooling water in the water storage tank is pumped into the U-shaped heat exchange pipe in the cooling chamber through the first water pressure pump, and then the cooling water in the U-shaped heat exchange pipe is refrigerated through low-temperature gas generated by the refrigerating machine; the cooled cooling water enters the refrigeration cavity again, the cooling mode can effectively avoid the situation that the pressure in the tank is increased due to heating of natural gas in the inner tank, finally, a water return pipe and a second water pressure pump are arranged, the cooling water losing the cooling effect can flow back into the water storage tank again, and then the recycling effect is achieved; according to the design, water resources are effectively saved, meanwhile, environmental pollution is reduced, the operation cost is reduced, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas storage well technical field, concretely is a kind of buried compressed natural gas storage well. BACKGROUND

[0002] Natural gas storage well is a kind of underground equipment for storing natural gas, usually artificial hole is dug in oil and gas field or gas reservoir, gas is compressed and injected to store, and natural gas storage well has greater gas storage capacity and longer service life, usually more than several decades, and has automatic pressure relief, explosion-proof, anticorrosion, leakage prevention and other protection measures, ensure the safety and reliability of stored gas.

[0003] At present, there are many kinds of natural gas storage wells, for example, a compressed natural gas storage well of Chinese patent No. CN201220285937.4, including gas cylinder, inner sleeve, outer sleeve, the upper part of the gas cylinder is connected with a gas inlet valve through pipeline, a pressure gauge and a safety valve are arranged between the gas inlet valve and the gas cylinder, the bottom of the gas cylinder is connected with a blowdown pipeline, the other end of the blowdown pipeline is provided with a blowdown pipeline valve, the gas cylinder is placed in the inner sleeve, the outer side of the inner sleeve is sequentially provided with the outer sleeve and oil well cement, a drying pipeline is arranged between the inner sleeve and the gas cylinder, the other end of the drying pipeline is provided with a drying pipeline valve, the inner sleeve and the outer sleeve are fixed together through sleeve coupling, the utility model has the advantages of simple structure, double sleeve improves impact resistance, avoids crack generation and reduces groundwater intrusion, and the inner sleeve can be lifted out as a whole for pipeline maintenance. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a buried compressed natural gas storage well, which has the advantages of adjustable cooling and solves the problem of physical cooling.

[0005] To achieve the above-mentioned adjustable cooling purpose, the utility model provides the following technical scheme: a buried compressed natural gas storage well, comprising a ground main body, a gas storage well assembly and an equipment box, the ground main body is provided with a gas storage well assembly and an equipment box, and a circulating cooling mechanism is arranged in the equipment box.

[0006] The circulating cooling mechanism comprises a water storage tank, a cooling chamber and a first water pressure pump, the water storage tank, the cooling chamber and the first water pressure pump are fixedly installed in the interior of the equipment box, the refrigerating machine and the U-shaped heat exchange pipe are fixedly installed in the interior of the cooling chamber, the backwater pipe extending to the interior of the gas storage well assembly is fixedly installed on the inner bottom wall of the water storage tank, the second water pressure pump is fixedly connected to one end of the backwater pipe extending to the interior of the gas storage well assembly, and the water inlet extending to the exterior of the equipment box is fixedly installed on the left side of the water storage tank.

[0007] Further, the gas storage well assembly is composed of a casing pipe, a gas storage tank body, a head and well cementing steel cement.

[0008] Further, the casing pipe is fixedly connected with the gas storage tank body in the interior, the upper and lower ends of the casing pipe are fixedly connected with the head, and the outer wall of the casing pipe and the upper head is paved with well cementing steel cement.

[0009] Further, the natural gas conveying pipe is fixedly installed on the inner top wall of the gas storage tank body, the natural gas discharging pipe is fixedly installed on the inner bottom wall of the gas storage tank body, the refrigerating cavity is formed on the inner wall of the gas storage tank body, a plurality of connecting frames are fixedly installed in the refrigerating cavity, and through holes are formed in the connecting frames.

[0010] Further, the water inlet end of the first water pressure pump is fixedly connected with the right inner wall of the water storage tank, and the water outlet end of the first water pressure pump is fixedly connected with the left side of the U-shaped heat exchange pipe.

[0011] Further, the bottom of the second water pressure pump is fixedly connected with the top of the lower head, the right end of the U-shaped heat exchange pipe is fixedly connected with the top inner wall of the refrigerating cavity through a pipeline, and the bottom end of the second water pressure pump is fixedly connected with the bottom inner wall of the refrigerating cavity through a pipeline.

[0012] Compared with the prior art, the technical scheme has the following beneficial effects:

[0013] 1. The buried compressed natural gas storage well is provided with the circulating cooling mechanism, the cooling water in the water storage tank is first pumped into the U-shaped heat exchange pipe in the cooling chamber through the first water pressure pump, the cooling water in the pipe is then refrigerated by the low-temperature gas generated by the refrigerating machine, the cooled cooling water enters the refrigerating cavity through the flow-through pipe arranged between the equipment box and the gas storage tank body, the gas storage tank body is effectively cooled after a large amount of cooling water enters the refrigerating cavity, the natural gas in the inner tank is prevented from being heated to cause the pressure in the tank to rise, the cooling water in the refrigerating cavity that has lost the cooling effect can be returned to the water storage tank through the backwater pipe and the second water pressure pump, and the effect of recycling is achieved, water resources are effectively saved, environmental pollution is reduced, the operation cost is reduced, and the practicability is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a structural front view of the utility model;

[0016] Figure 3 It is an assembly view of the gas storage well of the utility model;

[0017] Figure 4 It is an assembly view of the circulating cooling mechanism of the utility model.

[0018] In the figure: 1, ground main body; 2, gas storage well assembly; 201, casing; 202, gas storage tank main body; 2021, natural gas conveying pipe; 2022, natural gas discharge pipe; 2023, refrigeration cavity; 2024, connecting frame; 203, end closure; 204, well cementation steel cement; 3, equipment box; 4, circulating cooling mechanism; 401, water storage tank; 402, cooling chamber; 403, first water pressure pump; 404, refrigeration machine; 405, U-shaped heat exchange pipe; 406, return pipe; 407, second water pressure pump; 408, water injection port. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-4 A buried compressed natural gas storage well in the embodiment comprises a ground main body 1, a gas storage well assembly 2 and an equipment box 3, the gas storage well assembly 2 and the equipment box 3 are arranged on the ground main body 1, and the equipment box 3 is internally provided with a circulating cooling mechanism 4.

[0021] The circulating cooling mechanism 4 comprises a water storage tank 401, a cooling chamber 402 and a first water pressure pump 403, the inside of the equipment box 3 is fixedly installed with the water storage tank 401, the cooling chamber 402 and the first water pressure pump 403, the inside of the cooling chamber 402 is fixedly installed with a refrigeration machine 404 and a U-shaped heat exchange pipe 405, wherein the water inlet end of the first water pressure pump 403 is fixedly connected with the right side inner wall of the water storage tank 401, the water outlet end of the first water pressure pump 403 is fixedly connected with the left side of the U-shaped heat exchange pipe 405, and the right end of the U-shaped heat exchange pipe 405 is fixedly connected with the top inner wall of the refrigeration cavity 2023 through a pipeline. First, the cooling water in the water storage tank 401 is pumped into the U-shaped heat exchange pipe 405 in the cooling chamber 402 through the first water pressure pump 403, and then the cooling water in the pipe is subjected to refrigeration treatment by the low-temperature gas generated by the refrigeration machine 404. The cooled cooling water enters the refrigeration cavity 2023 through the flow-through pipe arranged between the equipment box 3 and the gas storage tank body 202. When a large amount of cooling water enters the refrigeration cavity 2023, the gas storage tank body 202 is effectively cooled. This cooling method can effectively prevent the pressure in the inner tank from rising due to heating of the natural gas. The inner bottom wall of the water storage tank 401 is fixedly installed with a backwater pipe 406 extending into the inside of the gas storage well assembly 2. One end of the backwater pipe 406 extending into the inside of the gas storage well assembly 2 is fixedly connected with a second water pressure pump 407. The bottom of the second water pressure pump 407 is fixedly connected with the top of the lower head 203, and the bottom end of the second water pressure pump 407 is fixedly connected with the bottom inner wall of the refrigeration cavity 2023 through a pipeline. Finally, the cooling water in the refrigeration cavity 2023 that has lost the cooling effect can be returned to the water storage tank 401 through the backwater pipe 406 and the second water pressure pump 407, thereby achieving the effect of recycling. This design effectively saves water resources, reduces environmental pollution and reduces operating costs, and has high practicability.

[0022] In the case implementation, the gas storage well assembly 2 is composed of a casing 201, a gas storage tank body 202, a head 203 and well cementing reinforced concrete 204, wherein the inside of the casing 201 is fixedly connected with the gas storage tank body 202, the casing 201 and the gas storage tank body 202 belong to the main part of the gas storage well, mainly used for fixing and storing natural gas, the upper and lower ends of the casing 201 are fixedly connected with the head 203, and the head 203 is located at the upper and lower ends of the casing 201, which can effectively fix and support. The outer walls of the casing 201 and the upper head 203 are both paved with well cementing reinforced concrete 204, which can effectively reinforce the main part of the gas storage well 204 and ensure its stability.

[0023] In the case implementation, the inner top wall of the gas tank body 202 is fixedly installed with a natural gas conveying pipe 2021, which facilitates the storage of natural gas. The inner bottom wall of the gas tank body 202 is fixedly installed with a natural gas discharge pipe 2022, which facilitates the extraction of natural gas. The inner wall of the gas tank body 202 is provided with a refrigeration cavity 2023. By arranging the refrigeration cavity 2023, the cooling water can be more effectively cooled. A plurality of connecting frames 2024 are fixedly installed in the refrigeration cavity 2023. The connecting frames 2024 can effectively maintain the stability of the gas tank body 202. The connecting frames 2024 are provided with through holes, which facilitate the filling of the entire refrigeration cavity 2023 with cooling water, thereby achieving better cooling effect.

[0024] In the case implementation, the left side of the water storage tank 401 is fixedly installed with a water inlet 408 extending to the outside of the equipment box 3. This can facilitate the replenishment of cooling water in the water storage tank 401 at any time, avoiding the depletion of cooling water due to consumption.

[0025] In the implementation, the following steps are performed:

[0026] 1) First, the cooling water in the water storage tank 401 is pumped into the U-shaped heat exchange pipe 405 in the cooling chamber 402 by the first water pressure pump 403;

[0027] 2) Then, the cooling water in the pipe is cooled by the low-temperature gas generated by the refrigeration machine 404;

[0028] 3) Then, the cooling water enters the refrigeration cavity 2023 through the flow pipe arranged between the equipment box 3 and the gas tank body 202. This cooling method can effectively prevent the natural gas in the inner tank from being heated and causing the pressure in the tank to rise;

[0029] 4) Finally, the cooling water in the refrigeration cavity 2023 that has lost its cooling effect can be returned to the water storage tank 401 through the return pipe 406 and the second water pressure pump 407, thereby achieving the effect of recycling.

[0030] In summary, the buried compressed natural gas storage well, by setting the circulating cooling mechanism 4, first through the first water pump 403 in the water storage tank 401 in the cooling chamber 402 into the U-shaped heat pipe 405, and then through the refrigeration machine 404 generated by the low temperature gas cooling water in the pipe for refrigeration treatment, the cooling down of the cooling water will be through the equipment box 3 and the gas storage tank body 202 between the flow pipe and enter the refrigeration cavity 2023, when a large amount of cooling water enters the refrigeration cavity 2023, the gas storage tank body 202 will be effectively cooled, the cooling method can effectively avoid the natural gas in the inner tank due to heat and cause the pressure in the tank to rise, finally through the setting of the backwater pipe 406 and the second water pump 407, the cooling water in the refrigeration cavity 2023 which has lost the cooling effect can be returned to the water storage tank 401, thereby completing the effect of recycling, the design effectively saves water resources, reduces environmental pollution and reduces operating costs, and has high practicability, solves the problem that the patent and the traditional natural gas storage well cannot cool the internal gas storage tank, if the internal and external temperature of the gas storage tank is large, the natural gas stored in the internal gas storage tank will be converted, and the converted form is easy to make the pressure in the natural gas storage tank rise, thereby generating a safety hazard.

[0031] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0032] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A buried compressed natural gas storage well, comprising a surface main body (1), a storage well assembly (2), and an equipment box (3), characterized in that: The ground body (1) is provided with a gas storage well assembly (2) and an equipment box (3), and the equipment box (3) is provided with a circulating cooling mechanism (4); The circulating cooling mechanism (4) includes a water storage tank (401), a cooling chamber (402), and a first water pressure pump (403). The water storage tank (401), the cooling chamber (402), and the first water pressure pump (403) are fixedly installed inside the equipment box (3). The cooling chamber (402) is fixedly installed with a chiller (404) and a U-shaped heat exchange tube (405). The inner bottom wall of the water storage tank (401) is fixedly installed with a return water pipe (406) extending into the gas storage well assembly (2). One end of the return water pipe (406) extending into the gas storage well assembly (2) is fixedly connected to a second water pressure pump (407). The left side of the water storage tank (401) is fixedly installed with a water inlet (408) extending into the outside of the equipment box (3).

2. The buried compressed natural gas storage well according to claim 1, characterized in that: The gas storage well assembly (2) is composed of a casing (201), a gas storage tank body (202), a head (203), and cementing steel reinforcement (204).

3. The buried compressed natural gas storage well according to claim 2, characterized in that: The casing (201) is fixedly connected to the gas storage tank body (202), and both the upper and lower ends of the casing (201) are fixedly connected to end caps (203). The outer walls of the casing (201) and the upper end cap (203) are both covered with cementing steel reinforcement (204).

4. The buried compressed natural gas storage well according to claim 2, characterized in that: A natural gas transmission pipe (2021) is fixedly installed on the inner top wall of the gas storage tank body (202), a natural gas discharge pipe (2022) is fixedly installed on the inner bottom wall of the gas storage tank body (202), a refrigeration cavity (2023) is opened on the inner wall of the gas storage tank body (202), and a plurality of connecting brackets (2024) are fixedly installed in the refrigeration cavity (2023), and each of the plurality of connecting brackets (2024) is provided with through holes.

5. The buried compressed natural gas storage well according to claim 1, characterized in that: The inlet of the first water pump (403) is fixedly connected to the inner wall of the right side of the water storage tank (401), and the outlet of the first water pump (403) is fixedly connected to the left side of the U-shaped heat exchange tube (405).

6. A buried compressed natural gas storage well according to claim 4, characterized in that: The bottom of the second water pressure pump (407) is fixedly connected to the top of the lower end cap (203), the right end of the U-shaped heat exchange tube (405) is fixedly connected to the top inner wall of the refrigeration cavity (2023) through a pipe, and the bottom end of the second water pressure pump (407) is fixedly connected to the bottom inner wall of the refrigeration cavity (2023) through a pipe.

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