An energy-saving anti-icing and anti-blocking gathering and transportation device and its gathering and transportation system

Abstract

This utility model belongs to the field of high-sulfur natural gas gathering and transportation technology, and discloses an energy-saving and anti-icing-blocking gathering and transportation device, its gathering and transportation system, and its application. The energy-saving and anti-icing-blocking gathering and transportation device includes a first natural gas transmission pipeline, a second natural gas transmission pipeline, a temperature transmitter, a first temperature control valve, a second temperature control valve, a pressure regulating valve, a pressure transmitter, a condensate heater, a condensate tap water transmission pipeline, a condensate self-return water transmission pipeline, and a low-pressure steam pipeline. The energy-saving and anti-icing-blocking gathering and transportation device provided by this utility model uses low-pressure steam transported by the low-pressure steam pipeline network to keep the collected natural gas warm, and at the same time uses the waste heat of the condensate condensed after the steam used in the natural gas desulfurization and purification device does work to heat the collected natural gas. The distance of the condensate transported from the purification unit to the gathering and transportation unit is relatively short, which can realize the centralized layout of the gathering and transportation device, modular construction, effective prevention and control of ice blockage in high-pressure and high-yield wells, and energy saving through waste heat recovery and utilization.

Description

Technical Field

[0001] This utility model relates to the field of high-sulfur gas field development technology that integrates gas extraction and purification, specifically to an energy-saving anti-icing and anti-blocking gathering and transportation device and its gathering and transportation system. Background Technology

[0002] Because the natural gas exiting the wellhead during the extraction of high-sulfur natural gas is under high pressure, a tree-forming unit (KN) is typically installed at the wellhead to regulate the working pressure and flow rate of the gas well, ensuring stable and safe extraction of natural gas. After leaving the KN, a throttling method is generally used to reduce the pressure and temperature of the natural gas to facilitate subsequent pipeline transportation in the purification unit. However, after throttling, the natural gas temperature decreases, and due to the considerable distance between the gathering and transportation unit and the wellhead, hydrate formation can occur, causing pipeline blockage. Therefore, in a typical process, a water-jacketed heater is used after throttling to provide a stable heat source for the natural gas, increasing its temperature to exceed the natural gas dew point at the current pressure, ensuring normal well production. The water-jacketed heater mainly consists of the heater body and control system. The heater body mainly comprises a shell, fire tubes, heater coils, level gauges, expansion tank, and chimney; the control system mainly comprises an automatic controller, a local controller, temperature sensors, and a burner. The high-temperature flame generated by the combustion of fuel natural gas in the burner directly enters the fire tubes and the flue gas outlet. Water near the fire tube and flue gas outlet expands under high temperature, decreasing in density and rising. This hot water comes into contact with the heating coil, transferring heat to the natural gas inside the coil, gradually raising its temperature. The water temperature then gradually decreases after heat transfer, increasing in density, and sinks back to the vicinity of the fire tube, where it is reheated and rises again. This cycle repeats continuously, forming a thermal circulation system. The natural gas flowing through the coil continuously gains heat in this thermal cycle, gradually increasing in temperature until the preset heating effect is achieved.

[0003] However, in actual production processes, water-jacketed heaters require additional fuel or electricity to heat water or other heat transfer media, which are then used to heat natural gas. Due to the need for continuous external energy input, energy consumption is high, especially in natural gas well sites where operating costs increase significantly without local heat supply. Furthermore, the working principle of a water-jacketed heater involves transferring heat from the heating medium to the water jacket and then from the water jacket to the natural gas, resulting in a long heat transfer path, significant heat loss, and low overall efficiency. Heat transfer effectiveness is also limited by water quality and equipment condition, making heat loss difficult to avoid. Secondly, water-jacketed heaters, due to water circulation, are prone to scaling and corrosion, especially in poor water quality conditions, increasing the complexity and cost of equipment maintenance. Regular cleaning and maintenance of the water jacket system is also necessary, potentially leading to extended downtime. In addition, water-jacketed heaters are large, requiring additional space to install the water jacket and heating devices, especially when used in multiple well areas simultaneously, increasing the footprint and limiting space utilization. Finally, due to the long heat transfer path, the water jacket heater cannot control the temperature accurately during the heating process, which can easily lead to underheating or overheating, affecting the stable transportation and processing of natural gas. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology of heating natural gas using a water jacket heater has problems such as long heat transfer path leading to large heat loss, inaccurate temperature control, easy scale corrosion, complex equipment maintenance, high cost, and large footprint of the water jacket heater. The present invention provides an energy-saving and anti-icing blockage gathering and transmission device that can improve heating efficiency while saving energy costs, maintenance costs, and footprint.

[0005] To solve the above-mentioned technical problems, the first aspect of this utility model provides an energy-saving anti-icing and anti-blocking gathering and transmission device, including a first natural gas transmission pipeline, a second natural gas transmission pipeline, a temperature transmitter, a first temperature control valve, a second temperature control valve, a pressure regulating valve, a pressure transmitter, a condensate heater, a condensate tap water transmission pipeline, a condensate self-return water transmission pipeline, and a low-pressure steam pipeline. The natural gas outlet of the gas-producing tree is connected to the natural gas inlet of the condensate heater via a first natural gas transmission pipeline; the natural gas outlet of the condensate heater is connected to the inlet of the metering separator via a second natural gas transmission pipeline; a temperature transmitter is installed at the end of the first natural gas transmission pipeline near the condensate heater; the inlet of the condensate heater is connected to the main condensate water supply via a condensate water supply pipeline, and the outlet of the condensate heater is connected to the main condensate water supply via a condensate return pipeline; a pressure transmitter, a pressure regulating valve, and a second temperature control valve are sequentially installed on the condensate water supply pipeline; a low-pressure steam pipeline is located outside the first natural gas transmission pipeline, and a first temperature control valve is installed on the low-pressure steam pipeline; the temperature transmitter, the first temperature control valve, the second temperature control valve, the pressure regulating valve, and the pressure transmitter are electrically connected to a controller.

[0006] In this invention, there are no particular restrictions on the way the temperature transmitter, the first temperature control valve, the second temperature control valve, the pressure regulating valve, and the pressure transmitter are electrically connected to the controller, and all of these are conventional technologies known or known to those skilled in the art.

[0007] According to some embodiments of the present invention, a first throttle valve is provided at the end of the first natural gas transmission pipeline near the gas production tree; a venting pipeline is provided after the first throttle valve; And / or, the second natural gas transmission pipeline is sequentially equipped with a second throttle valve and a third throttle valve.

[0008] According to some embodiments of the present invention, the outer layer of the low-pressure steam pipeline is provided with a heat insulation layer; the heat insulation layer is aluminum silicate fiber.

[0009] Aluminosilicate fiber can withstand temperatures exceeding 1000℃, making it suitable for high-temperature steam tracing systems. It is resistant to deformation and decomposition, and its low thermal conductivity provides excellent insulation, effectively reducing heat loss, lowering energy consumption, and improving tracing efficiency. Furthermore, its lightweight nature facilitates construction and installation, and it is easy to cut and shape. Its flexibility allows it to adapt to complex pipe shapes, helping to shorten installation time. Aluminosilicate fiber is not easily corroded by water vapor and chemicals, maintaining stability in harsh environments for extended periods, extending its service life and reducing maintenance frequency. Environmentally, aluminosilicate fiber is an inorganic material that does not release harmful substances during use, making it relatively environmentally friendly and meeting industrial safety and environmental requirements.

[0010] According to some embodiments of this utility model, a protective layer is provided outside the insulation layer; the protective layer is an aluminum sheet.

[0011] Because the moisture absorption of aluminum silicate fibers affects their insulation performance, aluminum cladding, with its excellent waterproof properties, can block water vapor and moisture, preventing the aluminum silicate fibers from becoming damp and ensuring that the insulation performance is not affected by the environment. The surface of the aluminum cladding can reflect some radiant heat, further reducing heat loss and improving insulation efficiency. Furthermore, the aluminum cladding can form an easily removable protective layer on the insulation layer, facilitating routine inspection and maintenance of the pipelines and reducing construction time. In addition, aluminum cladding also has good corrosion resistance, making it particularly suitable for outdoor environments or locations with strong corrosive atmospheres. It can protect the aluminum silicate fiber layer and the heat tracing pipeline from corrosion by external climate and chemicals, ensuring the long-term operation of the heat tracing system.

[0012] According to some embodiments of this utility model, at least three pressure transmitters are provided. Three pressure transmitters are installed in the condensate / tap water supply pipeline to monitor the pipeline pressure.

[0013] According to some embodiments of this utility model, a venting pipeline is provided above the condensate heater.

[0014] According to some embodiments of this utility model, at least two low-pressure steam pipelines are provided.

[0015] In this invention, the low-pressure steam pipeline is closely attached to the outer wall of the first natural gas transmission pipeline and is arranged in a U-shape along the axial direction of the first natural gas transmission pipeline.

[0016] The second aspect of this utility model provides a system including the energy-saving anti-icing device provided in the first aspect, comprising a data acquisition unit, a transmission unit, a temperature control unit, and a heating unit; The acquisition unit is used to acquire natural gas; The conveying unit is used to transport natural gas; The temperature control unit is used to control the temperature of natural gas; The heating unit is used to heat natural gas.

[0017] Beneficial effects: The energy-saving and anti-icing-blocking gathering and transportation device provided by this utility model uses low-pressure steam transported by a low-pressure steam pipeline network to keep the collected natural gas warm. At the same time, it uses the waste heat of the condensate water condensed after the steam used in the natural gas desulfurization and purification device does work to heat the collected natural gas. The distance from the purification unit to the gathering and transportation unit is relatively short (generally no more than 500 meters). It can realize the centralized layout of the gathering and transportation device, modular construction, effective prevention and control of ice blockage in high-pressure and high-yield wells, and energy saving through waste heat recovery and utilization.

[0018] The energy-saving and anti-icing-blocking gathering and transmission device provided by this utility model utilizes the waste heat of condensate to heat natural gas, eliminating the need for additional energy input and significantly reducing energy consumption. Simultaneously, the distance the condensate is transported from the purification unit to the gathering and transmission unit is relatively short (generally no more than 500 meters), resulting in a more direct heat transfer process, a shorter path, and less heat loss, thus leading to higher thermal efficiency. Furthermore, the gathering and transmission section occupies a small area and is simple to operate and maintain. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a system including the energy-saving anti-icing device described in this utility model.

[0020] Figure 2 This is a partial schematic diagram of the insulation layer of the first natural gas transmission pipeline in the energy-saving and anti-icing device of this utility model.

[0021] In the diagram, 1-First natural gas transmission pipeline, 2-Second natural gas transmission pipeline, 3-Temperature transmitter, 4-First temperature control valve, 5-Second temperature control valve, 6-Pressure regulating valve, 7-Pressure transmitter, 8-Condensate heater, 9-Condensate tap water transmission pipeline, 10-Condensate self-return water transmission pipeline, 11-Low-pressure steam pipeline, 12-First throttle valve, 13-Second throttle valve, 14-Third throttle valve, 15-Insulation layer, 16-Protective layer, 17-Gas tree, 18-Vent pipeline, 19-Metering separator, 20-Low-pressure steam inlet pipeline, 21-Condensate tap water main pipe, 22-Condensate self-return water main pipe, 23-Low-pressure steam outlet pipeline. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments. However, the present invention is not limited to these embodiments.

[0023] Unless otherwise specified, all raw materials and components used in the following embodiments and comparative examples of this utility model are commercially available.

[0024] In the following embodiments of this utility model, the condensate heater was purchased from Shandong Lianmeng Special Equipment Co., Ltd., model number R22046.

[0025] Example This embodiment provides an energy-saving anti-icing device. The energy-saving anti-icing device includes a first natural gas transmission pipeline 1, a second natural gas transmission pipeline 2, a temperature transmitter 3, a first temperature control valve 4, a second temperature control valve 5, a pressure regulating valve 6, a pressure transmitter 7, a condensate heater 8, a condensate tap water transmission pipeline 9, a condensate return water transmission pipeline 10, and a low-pressure steam pipeline 11. The natural gas outlet of the gas extraction tree 17 is connected to the natural gas inlet of the condensate heater 8 via a first natural gas transmission pipeline 1; the natural gas outlet of the condensate heater 8 is connected to the inlet of the metering separator 19 via a second natural gas transmission pipeline 2; the temperature transmitter 3 is installed at one end of the first natural gas transmission pipeline 1 near the condensate heater 8; the inlet of the condensate heater 8 is connected to the condensate main water supply pipe 21 via a condensate water supply pipeline 9, and the outlet of the condensate heater 8 is connected to the condensate main water supply pipe 21 via a condensate water supply pipeline 9. The condensate return water pipeline 10 is connected to the condensate return water main 22; the condensate water pipeline 9 is sequentially equipped with the pressure transmitter 7, the pressure regulating valve 6, and the second temperature control valve 5; the low-pressure steam pipeline 11 is located on the outer layer of the first natural gas pipeline 1, and the low-pressure steam pipeline 11 is equipped with the first temperature control valve 4; the temperature transmitter 3, the first temperature control valve 4, the second temperature control valve 5, the pressure regulating valve 6, and the pressure transmitter 7 are electrically connected to the controller.

[0026] In the above-mentioned device, a first throttle valve 12 is installed at the end of the first natural gas transmission pipeline 1 near the gas production tree 17; a second throttle valve 13 and a third throttle valve 14 are sequentially installed on the second natural gas transmission pipeline 2; an insulation layer 15 is provided on the outer layer of the low-pressure steam pipeline 11; the insulation layer 15 is made of aluminum silicate fiber; a protective layer 16 is provided outside the insulation layer 15; the protective layer 16 is made of aluminum sheet; three pressure transmitters 7 are provided; two low-pressure steam pipelines 11 are provided; and venting pipelines 18 are provided above the condensate heater 8 and after the first throttle valve 12.

[0027] The working process of the energy-saving anti-icing device described in this embodiment is as follows: Natural gas extracted through the gas extraction tree 17 is depressurized by the first throttle valve 12. After initial adjustment of the flow rate and pressure, it enters the condensate heater 8 through the first natural gas transmission pipeline 1. While passing through the first natural gas transmission pipeline 1, the low-pressure steam in the low-pressure steam pipeline 11 heats and keeps the natural gas warm. Then, in the condensate heater 8, it undergoes sufficient heat exchange with the condensate from the condensate tap water main 21 to raise its temperature before entering the second natural gas transmission pipeline 2. The condensate enters from the top and exits from the bottom through the shell side of the condensate heater 8, while the natural gas enters from the bottom and exits from the top through the tube side of the condensate heater 8. The natural gas inside the coil undergoes sufficient heat exchange with the condensate in the shell side, thereby raising the temperature of the natural gas. When the pressure reaches 90% of the shell side design pressure... The safety valve opens to release pressure. On the second natural gas pipeline 2, natural gas passes through the second throttle valve 13 and the third throttle valve 14 for secondary and tertiary throttling to reduce pressure before entering the metering separator 19 for gas-liquid separation. Temperature transmitter 3, first temperature control valve 4, second temperature control valve 5, pressure regulating valve 6, and pressure transmitter 7 are electrically connected to the controller. Temperature information is transmitted to the controller through temperature transmitter 3. The controller adjusts the first temperature control valve 4 and the second temperature control valve 5 based on the temperature information feedback. By adjusting the valve opening of the first temperature control valve 4 and the second temperature control valve 5, the flow rate of low-pressure steam entering the low-pressure steam pipeline 11 or the flow rate of condensate entering the condensate heater 8 is controlled. By changing the medium flow rate, the heating temperature is precisely controlled.

[0028] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. An energy-saving, anti-icing and anti-blocking data collection and transportation device, characterized in that, It includes a first natural gas transmission pipeline (1), a second natural gas transmission pipeline (2), a temperature transmitter (3), a first temperature control valve (4), a second temperature control valve (5), a pressure regulating valve (6), a pressure transmitter (7), a condensate heater (8), a condensate tap water transmission pipeline (9), a condensate self-return water transmission pipeline (10), and a low-pressure steam pipeline (11). The natural gas outlet of the gas extraction tree (17) is connected to the natural gas inlet of the condensate heater (8) via the first natural gas transmission pipeline (1); the natural gas outlet of the condensate heater (8) is connected to the inlet of the metering separator (19) via the second natural gas transmission pipeline (2); the temperature transmitter (3) is installed at one end of the first natural gas transmission pipeline (1) near the condensate heater (8); the inlet of the condensate heater (8) is connected to the condensate main water supply pipe (21) via the condensate tap water transmission pipeline (9), and the outlet of the condensate heater (8) is connected to the condensate tap water main pipe (21). The self-return water pipeline (10) is connected to the condensate self-return water main (22); the pressure transmitter (7), the pressure regulating valve (6), and the second temperature control valve (5) are sequentially installed on the condensate tap water pipeline (9); the low-pressure steam pipeline (11) is installed on the outer layer of the first natural gas pipeline (1), and the first temperature control valve (4) is installed on the low-pressure steam pipeline (11); the temperature transmitter (3), the first temperature control valve (4), the second temperature control valve (5), the pressure regulating valve (6), and the pressure transmitter (7) are electrically connected to the controller respectively.

2. The gathering and transportation device according to claim 1, characterized in that, A first throttle valve (12) is installed at the end of the first natural gas transmission pipeline (1) near the gas production tree (17).

3. The gathering and transportation device according to claim 1, characterized in that, A second throttle valve (13) and a third throttle valve (14) are sequentially installed on the second natural gas transmission pipeline (2).

4. The gathering and transportation device according to claim 1, characterized in that, The low-pressure steam pipeline (11) is provided with an insulation layer (15) on its outer layer.

5. The gathering and transportation device according to claim 4, characterized in that, A protective layer (16) is provided outside the insulation layer (15).

6. The gathering and transportation device according to claim 1, characterized in that, At least three pressure transmitters (7) are provided.

7. The gathering and transportation device according to claim 6, characterized in that, Three pressure transmitters (7) are provided.

8. The gathering and transportation device according to claim 1, characterized in that, At least two low-pressure steam pipelines (11) are provided.

9. The gathering and transportation device according to claim 8, characterized in that, Two low-pressure steam pipelines (11) are provided.

10. A data collection and transportation system comprising the energy-saving anti-icing and anti-blocking data collection and transportation device according to any one of claims 1-9, characterized in that, It includes a data acquisition unit, a transmission unit, a temperature control unit, and a heating unit; The acquisition unit is used to acquire natural gas; The conveying unit is used to transport natural gas; The temperature control unit is used to control the temperature of natural gas; The heating unit is used to heat natural gas.

Images