CN219061101U - External buried CNG storage well of natural gas pipeline - Google Patents

Abstract

A buried CNG storage well externally connected to a natural gas pipeline, which relates to the field of natural gas storage and transportation. The utility model device includes a protection wellbore, a supporting roof, a CNG storage tank, a gas transmission pipeline, a connecting pipeline, and a control box. A supporting roof is arranged on the top of the protecting wellbore. CNG storage tanks and liquid level gauges are arranged inside the protected wellbore. The CNG storage tanks are connected to the connecting pipelines through gas transmission pipelines. Electric control valves, flow meters, and booster pumps are arranged on the gas transmission pipelines. Pressure gauges are arranged on the CNG storage tanks. For sensors, a supporting frame is arranged on the surface of the supporting roof, and the connecting pipe is fixedly arranged on the supporting frame. A control box is arranged on the top of the connecting pipe, and a data sending and receiving device, a valve controller, a brake controller, and a positioner are arranged in the control box. Small in size and flexible in installation, it can store and release natural gas by remote control, which solves the problems of high cost, long construction period and high maintenance cost of conventional construction of natural gas peak shaving storage.

Description

A kind of buried CNG storage well connected outside the natural gas pipeline

technical field

The utility model relates to the field of natural gas storage and transportation, in particular to a buried type CNG storage well externally connected to a natural gas pipeline.

Background technique

In the context of developing a low-carbon economy, natural gas is highly regarded and is gradually becoming the pillar of primary energy for the world in the future. The main component of natural gas is CH ₄ , and the combustion products are CO ₂ and water. It is a clean energy and low-carbon fuel. The CO ₂ emitted by natural gas during combustion is 57% of coal combustion, 71% of fuel oil, and the emission of NO _X is higher than that of Coal and oil are reduced by 80% and 72% respectively, making it an ideal clean fuel.

CNG, or Compressed Natural Gas (CNG for short), is natural gas that is pressurized and stored in a container in a gaseous state. In addition to natural gas in oil fields and natural gas fields, compressed natural gas can also be used to artificially produce biogas (mainly composed of methane). The composition of natural gas and pipeline natural gas is the same, and the main component is methane (CH ₄ ). As one of the commonly used natural gas storage and transportation methods, CNG has great convenience.

At present, in natural gas safety peak-shaving technology, natural gas peak-shaving storage is usually built to adjust the peak, valley, and level of gas-consuming units. However, the cost of building a natural gas peak-shaving storage is relatively high, and it takes a long time from the pre-construction land acquisition to the final construction. 1-2 years, and the labor cost of follow-up maintenance is also high.

In "Niu Yue. Development Status and Prospects of my country's Natural Gas Storage Peak Shaving System [J]. Contemporary Chemical Industry, 2021, 50 (07). " also pointed out that the main problems of my country's gas storage peak shaving system include four aspects:

1) Although 25 underground gas storages have been built in my country, due to the difficulty of development and the limitation of injection and production capacity, the pace of construction of underground gas storages is quite slow. At the same time, the topographical conditions of salt cavern underground gas storages in my country are complex, and artificial cavity construction is difficult It is very large, and there are many unstable factors in the construction of the inventory, resulting in a long construction time.

2) Since LNG prices are easily affected by international oil prices, my country's LNG import prices have a relatively high premium compared with developed countries. LNG peak shaving stations in large domestic cities have very weak anti-risk capabilities, and LNG receiving stations are easily affected by gas supply sources, collection and transportation costs, and climate.

3) Most of the gas fields in my country have certain limitations in terms of reserves and production capacity, and there are few high-quality gas fields suitable for peak shaving. Many gas fields in service have experienced severe water and sand production and a sharp decline in production, which has caused great hidden dangers to the scientific development of gas fields.

4) At present, the domestic land natural gas import pipeline gas is mainly imported, which has caused huge pressure on the peak-shaving gas supply in the main gas-consuming areas in eastern my country.

Therefore, in view of the above problems, the utility model proposes a buried CNG storage well externally connected to a natural gas pipeline, so as to solve the problem of the existing natural gas peak-shaving storage.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings, and provide a buried CNG storage well externally connected to a natural gas pipeline. The new device is small in size, flexible in installation, and short in operation time. Coordinated use can monitor and protect the liquid level in the wellbore, natural gas storage/output flow, and natural gas storage pressure in real time. Through the coordinated use of data transceiver devices, electric control valves, booster pumps, valve controllers, and brake controllers, remote control can be realized. The operation of storing and releasing natural gas is carried out in a controlled manner, and only one operator is required to operate multiple new devices during use, which solves the problems of high cost, long construction period and high maintenance cost of the conventional construction of natural gas peak-shaving storage For natural gas peak shaving storage, the new device does not require separate land acquisition, and the new device can be installed only under the pipeline.

The new device can relieve the pressure of natural gas safety peak shaving, but it cannot completely replace the natural gas peak shaving warehouse.

The embodiment of the utility model provides a buried CNG storage well externally connected to a natural gas pipeline, which includes a protection shaft, a supporting roof, a CNG storage tank, a gas transmission pipeline, a connecting pipeline, and a control box. The top of the protection shaft is arranged with a supporting roof, so A CNG storage tank and a liquid level gauge are arranged inside the protected shaft, and the CNG storage tank is connected to the connecting pipeline through a gas transmission pipeline, and an electric control valve, a flow meter, and a booster pump are arranged on the gas transmission pipeline. A pressure sensor is arranged on the CNG storage tank, a support frame is arranged on the surface of the supporting roof, the connecting pipe is fixedly arranged on the supporting frame, a control box is arranged on the top of the connecting pipe, and flanges are arranged at both ends of the connecting pipe , the control box is arranged with a data transceiver, a valve controller, a brake controller, and a positioner.

The data transmitting and receiving device is connected with liquid level gauge, flow meter, pressure sensor, valve controller, brake controller and positioner through data cable, and the valve controller is connected with electric control valve through control cable. The brake controller is connected with the booster pump through a control cable.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the structure of the utility model.

Figure 2 is a schematic diagram of the layout of the control box.

Figure 3 is a schematic diagram of testing the new device.

Reference numerals: 1. Protective wellbore 2, supporting roof 3, CNG storage tank 4, liquid level gauge 5, gas transmission pipeline 6, connecting pipeline 7, electric control valve 8, flow meter 9, booster pump 10, pressure sensor 11 , Control box 12, support frame 13, flange 14, data transceiver device 15, valve controller 16, brake controller 17, positioner.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1-3, the embodiment of the utility model provides a buried CNG storage well externally connected to a natural gas pipeline, including a protection wellbore 1, a supporting roof 2, a CNG storage tank 3, a gas transmission pipeline 5, a connecting pipeline 6, a control box 11, a support roof 2 is arranged on the top of the protection shaft 1, a CNG storage tank 3 and a liquid level gauge 4 are arranged inside the protection shaft 1, and the CNG storage tank 3 is connected to the connecting pipe 6 through the gas transmission pipeline 5 An electric control valve 7, a flow meter 8, and a booster pump 9 are arranged on the gas pipeline 5, a pressure sensor 10 is arranged on the CNG storage tank 3, and a support frame 12 is arranged on the surface of the supporting top plate 2, so The connecting pipe 6 is fixedly arranged on the support frame 12, the top of the connecting pipe 6 is arranged with a control box 11, the two ends of the connecting pipe 6 are arranged with flanges 13, and the control box 11 is arranged with a data transmitting and receiving device 14, Valve controller 15, brake controller 16, positioner 17.

The data transceiving device 14 is connected with the liquid level meter 4, the flow meter 8, the pressure sensor 10, the valve controller 15, the brake controller 16, and the positioner 17 through the data cable, and the valve controller 15 is connected with the control cable through the control cable. The electric control valve 7 is connected, and the brake controller 16 is connected with the booster pump 9 through a control cable.

When the protection shaft 1 is manufactured, a storage pit is first dug at the target use site, and then heat preservation and waterproofing are carried out, and then bricks, steel bars, and concrete are used for construction. The specifications of the protection shaft 1 can be adjusted according to actual use requirements.

The supporting top plate 2 is made of stainless steel, and its specifications are adjusted according to the specifications of the protected shaft 1. A gasket is arranged at the joint between the supporting top plate 2 and the protected shaft 1.

The CNG storage tank 3 is a conventional CNG storage container, and its volume can be adjusted according to actual usage requirements.

When the new device is used, due to weather or other reasons, there may be a certain amount of accumulated water in the protection shaft 1. The liquid level gauge 4 is used to monitor the liquid level in the protection shaft 1. When in use, the liquid level gauge 4 passes through the data cable. It is connected with the data transceiver device 14 for transmitting the liquid level data to the data transceiver device 14 .

The gas transmission pipeline 5 is made of stainless steel, and is used for storing the natural gas in the connecting pipeline 6 into the CNG storage tank 3 and for exporting the natural gas in the CNG storage tank 3 to the connecting pipeline 6 .

The connecting pipe 6 is made of stainless steel, and is connected to the natural gas pipeline through the flanges 13 at both ends when in use, and its specification is adjusted according to the actual operation target natural gas pipeline.

The electronically controlled valve 7 is connected to a valve controller 15 through a control cable, and the valve controller 15 is connected to a data transceiver device 14 through a data cable.

The flow meter 8 is used to record the flow of natural gas. When in use, the flow meter 8 is connected to the data transceiver device 14 through a data cable, and is used to transmit the flow data to the data transceiver device 14 .

The booster pump 9 is connected to a brake controller 16 through a control cable, and the brake controller 16 is connected to a data transceiver device 14 through a data cable.

When the utility model is used, the data transceiver device 14 is connected with the control center signal, the control center sends the control signal to the data transceiver device 14, the data transceiver device 14 transfers the control signal to the valve controller 15, and the valve controller 15 controls the electric control valve 7 to open On/off, the data transceiving device 14 transfers the control signal to the brake controller 16, and the brake controller 16 controls the positive/reverse rotation of the booster pump 9 and the output of braking power.

The pressure sensor 10 is used to record the pressure of the CNG storage tank 3 . In use, the pressure sensor 10 is connected to the data transceiver device 14 through a data cable for transmitting pressure data to the data transceiver device 14 .

The control box 11 is used to protect its internal components from environmental factors.

The support frame 12 is made of stainless steel and is used to support the connecting pipe 6 .

The data transceiving device 14 is connected with the control center signal when in use, and is used to send liquid level data, flow data, pressure data, and positioning data to the control center in real time, and receive control signals sent by the control center in real time, and send them to the valve controller 15. Braking controller 16.

The locator 17 is used to obtain location information and send the location information to the data transceiver device 14, and the locator 17 is connected to the data transceiver device 14 through a data cable.

The inner walls of the CNG storage tank 3 , the gas pipeline 5 and the connecting pipeline 6 are provided with a ceramic anti-corrosion film.

The specification of each component of the utility model can be adjusted according to actual application.

The utility model needs to be connected to a power source when in use.

One or more devices of the utility model can be arranged on a natural gas pipeline.

The method for using a buried CNG storage well externally connected to a natural gas pipeline comprises the following steps:

Step 1. Adjust the specifications of each component of the utility model device according to the actual use conditions.

Step 2. During new construction/overhaul of natural gas pipelines, dig out storage pits at the target site of use, then carry out heat preservation and waterproofing operations, and then use bricks, steel bars, and concrete for construction to build a protective shaft 1, and gradually install other parts of the new device Install.

Step 3: Connect the two ends of the connecting pipeline 6 with the natural gas pipeline through the flange 13 .

Step 4, connect the data transceiving device 14 with the control center, and use the positioning information of the locator 17 as the serial number of the utility model device.

In one embodiment, in step 4, 10 utility model devices are installed on the natural gas pipeline, and according to the positioning information of the locator 17, the ten utility model devices are numbered as KCKJ01-10.

Step 5. When the amount of natural gas is at a trough, the control center sends a control signal to the data transceiver device 14, and the data transceiver device 14 sends a control signal to the valve controller 15. The valve controller 15 controls the electric control valve 7 to open, and the data transceiver device 14 sends The control signal is sent to the brake controller 16, and the brake controller 16 controls the booster pump 9 to rotate forward, and the natural gas in the connecting pipeline 6 is boosted and output to the CNG storage tank 3 through the gas transmission pipeline 5, and the pressure is continued to compress the natural gas After the storage is completed, the booster pump 9 and the electric control valve 7 are closed. During the operation, the flow data is recorded by the flow meter 8, and the pressure data is recorded by the pressure sensor 10.

Step 6. When the amount of natural gas is peak, the control center sends a control signal to the data transceiver device 14, and the data transceiver device 14 sends a control signal to the valve controller 15. The valve controller 15 controls the opening of the electric control valve 7, and the data transceiver device 14 sends a control signal. The signal is sent to the brake controller 16, and the brake controller 16 controls the booster pump 9 to reverse, and the natural gas in the CNG storage tank 3 is boosted and output to the connecting pipeline 6 through the gas transmission pipeline 5. After the output is completed, the booster pump 9 is turned off , The electric control valve 7, during operation, the flow data is recorded by the flow meter 8, and the pressure data is recorded by the pressure sensor 10.

Step 7. When the new device is in use, when there is water accumulation in the protection shaft 1, the liquid level gauge 4 transmits the liquid level data to the data transceiver device 14 and the control center, and then artificial drainage can be performed.

The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (2)

1. A buried type CNG storage well externally connected to a natural gas pipeline, characterized in that it comprises a protection shaft (1), a supporting roof (2), a CNG storage tank (3), a gas transmission pipeline (5), and a connecting pipeline (6) , a control box (11), a support roof (2) is arranged on the top of the protection shaft (1), a CNG storage tank (3) and a liquid level gauge (4) are arranged inside the protection shaft (1), and the CNG The storage tank (3) is connected to the connection pipeline (6) through the gas pipeline (5), and the gas pipeline (5) is arranged with an electric control valve (7), a flow meter (8), a booster pump (9 ), a pressure sensor (10) is arranged on the CNG storage tank (3), a support frame (12) is arranged on the surface of the support top plate (2), and the connecting pipeline (6) is fixedly arranged on the support frame (12) Above, a control box (11) is arranged on the top of the connecting pipe (6), flanges (13) are arranged at both ends of the connecting pipe (6), and a data transmitting and receiving device (14) is arranged in the control box (11) ), valve controller (15), brake controller (16), positioner (17). 2. A kind of buried type CNG storage well externally connected to a natural gas pipeline according to claim 1, characterized in that, the gas transmission pipeline (5) and the connecting pipeline (6) are made of stainless steel, and the CNG storage tank (3 ), the inner walls of the gas pipeline (5) and the connection pipeline (6) are arranged with a ceramic anti-corrosion film.

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