Steam recovery and steady flow heat preservation device for heat exchange system of gas transmission station

Abstract

The utility model discloses a heat exchange system steam recovery and steady flow heat preservation device for gas transmission station, including steam recovery subassembly, control unit and auxiliary heating pipeline, steam recovery subassembly includes pressure control recovery tank, flow distribution valve and pressure regulating valve, pressure control recovery tank is equipped with first export and second export, is connected with the inlet of auxiliary heating pipeline and the return line of heat exchange system or water supply tank respectively, control unit includes program controller, temperature sensor and pressure sensor, and auxiliary heating pipeline is close to the outer wall of main process pipeline and is laid, the utility model discloses creatively integrate steam recovery, pressure stabilization, storage tank buffer, pipeline auxiliary heating and intelligent energy supplement function in one, convert the originally wasted emission steam into useful heat preservation heat source and system supplement energy, significantly reduce the energy consumption of electric auxiliary heating or gas heating, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of natural gas transmission technology, and in particular to a steam recovery and flow stabilization insulation device for a heat exchange system in a gas transmission station, used for waste heat recovery and stable operation of the heat exchange system in a gas transmission station in cold regions. Background Technology

[0002] A gas transmission station heat exchanger is a device used in natural gas transmission stations. It is mainly used to recover and utilize the cold energy of natural gas during the transmission process and convert it into usable heat energy or other forms of energy, thereby improving energy utilization efficiency and reducing energy consumption and operating costs.

[0003] In existing natural gas transmission stations in cold regions, hot water is commonly used as the heat exchange medium to heat natural gas or other process equipment. Due to the influence of external environmental factors and water quality, the high-temperature, high-pressure water used tends to generate large amounts of superheated steam during the day when sunlight is strong and ambient temperatures rise. Current technology typically releases this steam directly into the atmosphere, resulting in significant waste of high-quality heat energy and posing certain safety hazards. Furthermore, the uncontrolled release of steam causes fluctuations in internal system pressure and heat load, affecting the stable operation of the main heat exchange equipment. Additionally, a sudden drop in ambient temperature at night reduces heat exchange efficiency, potentially causing terminal equipment (such as separators and pressure regulating skids) to operate abnormally due to low temperatures.

[0004] In the existing technology, direct steam recovery and utilization devices are rare. The conventional approach is to directly discharge the steam or use simple condensation recovery, which cannot achieve intelligent distribution and pressure stabilization control according to system needs, nor can the recovered steam be used for pipeline insulation.

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device that can recover waste heat, stabilize system operation, eliminate safety hazards, and is energy-efficient. Utility Model Content

[0006] This invention provides a steam recovery and flow stabilization insulation device for a heat exchange system in a gas transmission station, which can solve the above-mentioned defects in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model provides a steam recovery and flow stabilization insulation device for a heat exchange system in a gas transmission station, including: a steam recovery component, a control unit, and an auxiliary heating pipe; The steam recovery assembly includes a pressure-controlled recovery tank, a flow distribution valve, and a pressure regulating valve; the outlet of the pressure regulating valve is connected to the inlet of the flow distribution valve via a pipe, and one outlet of the flow distribution valve is connected to the inlet of the pressure-controlled recovery tank via a pipe. The pressure-controlled recovery tank has a first outlet and a second outlet. The first outlet has a first check valve and is connected to the inlet of the auxiliary heating pipe. The second outlet has a second check valve and an energy replenishment control valve and is connected to the return pipeline or the water supply tank of the heat exchange system via a pipe. The control unit includes a programmable controller, a temperature sensor, and a pressure sensor; wherein, the temperature sensor is installed on the outer wall of the main process pipeline to detect the temperature inside the main process pipeline; the pressure sensor is installed on the pipeline between the flow distribution valve and the pressure regulating valve; the signal input terminal of the programmable controller is electrically connected to the temperature sensor and the pressure sensor, and its signal output terminal is electrically connected to the flow distribution valve, the energy replenishment control valve, and the pressure regulating valve; The program controller controls the opening and closing or the degree of opening of the flow distribution valve, the energy replenishment control valve and the pressure regulating valve based on the detection signals of the temperature sensor and the pressure sensor. The auxiliary heating pipe is laid close to the outer wall of the main process pipe and is used to heat and insulate the main process pipe.

[0008] In a preferred embodiment of this utility model, the flow distribution valve is an electric three-way regulating valve, whose inlet receives steam after pressure regulation, whose first outlet is connected to the pressure control recovery tank through a pipeline, and whose second outlet is connected to the auxiliary heating pipeline through a pipeline.

[0009] In a preferred embodiment of this utility model, the pressure regulating valve is a self-operated pressure regulating valve or an electric regulating valve.

[0010] In a preferred embodiment of the present invention, the steam recovery assembly further includes a safety valve and a first shut-off valve, wherein the outlet of the safety valve is connected to the inlet of the first shut-off valve, and the outlet of the first shut-off valve is connected to the inlet of the pressure regulating valve.

[0011] In a preferred embodiment of the present invention, the pressure-controlled recovery tank is covered with an insulation layer.

[0012] In a preferred embodiment of the present invention, the auxiliary heating pipe is attached to the outer wall of the main process pipe in a parallel or spiral winding manner.

[0013] In a preferred embodiment of this utility model, the auxiliary heating pipe is a metal pipe of DN15-DN25.

[0014] In a preferred embodiment of the present invention, a second shut-off valve is provided on the pipeline between the flow distribution valve and the auxiliary heating pipeline; and a third shut-off valve is provided on the pipeline between the flow distribution valve and the pressure control recovery tank.

[0015] In a preferred embodiment of this utility model, the program controller is configured to: control the flow distribution valve to distribute steam to the auxiliary heating pipeline when the temperature detected by the temperature sensor is lower than a first set threshold; and control the opening of the energy replenishment control valve when the temperature detected by the temperature sensor is lower than a second set threshold.

[0016] In a preferred embodiment of this utility model, the device is connected after the safety vent valve of the heat exchange equipment in the gas transmission station.

[0017] The beneficial effects of this utility model are as follows: This utility model is a steam recovery and flow stabilization heat preservation device for a heat exchange system in a gas transmission station. It creatively integrates functions such as steam recovery, pressure stabilization, storage tank buffering, pipeline auxiliary heating and intelligent energy replenishment into one unit. It transforms the originally wasted exhaust steam into a useful heat source for heat preservation and system energy replenishment, which significantly reduces the energy consumption of electric heat tracing or gas heating and has strong practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of a steam recovery and flow stabilization insulation device for a heat exchange system in a gas transmission station according to the present invention; The components in the attached diagram are labeled as follows: 10. Pressure-controlled recovery tank; 11. Insulation layer; 12. Inlet; 13. First outlet; 14. Second outlet; 20. Flow distribution valve, 30. Pressure regulating valve, 40. First shut-off valve, 50. Safety valve, 60. Second shut-off valve, 70. Third shut-off valve, 80. Auxiliary heating pipeline, 90. First check valve, 100. Second check valve, 110. Energy replenishment control valve, 120. Water replenishment tank, 130. Temperature sensor, 140. Pressure sensor, 150. Main process pipeline. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] like Figure 1 As shown, the steam recovery and flow stabilization insulation device for the heat exchange system of the gas transmission station of this utility model is connected after the safety vent valve of the heat exchange equipment in the gas transmission station, and specifically includes: a steam recovery component, a control unit and an auxiliary heating pipeline.

[0021] Specifically, the steam recovery assembly includes a pressure-controlled recovery tank 10, a flow distribution valve 20, a pressure regulating valve 30, a first shut-off valve 40, and a safety valve 50. The outlet of the safety valve 50 is connected to the inlet of the first shut-off valve 40, the outlet of the first shut-off valve 40 is connected to the inlet of the pressure regulating valve 30, the outlet of the pressure regulating valve 30 is connected to the inlet of the flow distribution valve 20 via a pipeline, one outlet of the flow distribution valve 20 is connected to the inlet 12 of the pressure-controlled recovery tank 10 via a pipeline, the flow distribution valve 20 is an electrically operated three-way regulating valve, and its second outlet is connected to the auxiliary heating pipeline 80 via a pipeline. The pressure regulating valve 30 is a self-operated pressure regulating valve or an electrically operated regulating valve.

[0022] In addition, a second shut-off valve 60 is provided on the pipeline between the flow distribution valve 20 and the auxiliary heating pipeline 80; a third shut-off valve 70 is provided on the pipeline between the flow distribution valve 20 and the pressure control recovery tank 10.

[0023] Steam flows sequentially through the safety valve 50, the normally open first shut-off valve 40, the pressure regulating valve 30, and the flow distribution valve 20. The pressure regulating valve 30 stabilizes the upstream pressure at 0.3 MPa. One outlet of the flow distribution valve 20 leads to the pressure control recovery tank 10 via the third shut-off valve 70, and the other outlet leads to the auxiliary heating pipeline 80 via the second shut-off valve 60.

[0024] The pressure-controlled recovery tank 10 has a pressure-bearing tank body covered with an insulation layer 11. The tank body also has a first outlet 13 and a second outlet 14. The first outlet 13 is equipped with a first check valve 90 and connected to the inlet of the auxiliary heating pipe 80. The second outlet 14 is equipped with a second check valve 100 and a replenishment control valve 110, and is connected to the return pipe of the heat exchange system or the replenishment water tank via a pipeline. The return pipe is the low-temperature return water pipe of the heat exchange system; in this embodiment, it is connected to the replenishment water tank 120.

[0025] The control unit includes a programmable controller, a temperature sensor 130, and a pressure sensor 140. The temperature sensor 130 is installed on the outer wall of the main process pipeline 150 to detect the temperature inside the main process pipeline; the pressure sensor 140 is located on the pipeline between the flow distribution valve 20 and the pressure regulating valve 30.

[0026] The signal input terminal of the program controller is electrically connected to the temperature sensor 130 and the pressure sensor 140, and its signal output terminal is electrically connected to the flow distribution valve 20, the energy replenishment control valve 110 and the pressure regulating valve 30.

[0027] Specifically, the program controller is configured to: when the temperature detected by the temperature sensor 130 is lower than a first set threshold, control the flow distribution valve 20 to distribute steam to the auxiliary heating pipe 80; and when the temperature detected by the temperature sensor 130 is lower than a second set threshold, control the opening of the energy replenishment control valve 110.

[0028] During operation, the program controller is set to activate auxiliary heating when the temperature threshold is T1 < 50℃ and to activate supplementary energy when the temperature threshold is T1 < 30℃. The system operates automatically without manual intervention, achieving fully automated management of waste heat recovery, stable insulation, and safe supplementary energy.

[0029] The auxiliary heating pipe 80 is a DN15 metal pipe that is tightly attached to the outer wall of the main process pipe 150 in a spiral winding manner, specifically inside the outer insulation layer, in order to maximize the heat exchange area and heat and insulate the main process pipe.

[0030] The working principle of this utility model is as follows: The control unit monitors the temperature T1 of the main process pipeline 150 and the inlet pressure P1 of the pressure control recovery tank 10 in real time. When the system generates excess steam, the steam is stabilized by the safety valve 50 and the pressure regulating valve 30, and then guided by the flow distribution valve 20 to the pressure control recovery tank 10 for storage or directly into the auxiliary heat pipeline 80.

[0031] Normal heat preservation mode: When T1 is lower than the first set value (e.g., 50℃) but higher than the second set value (e.g., 30℃), the program controller adjusts the flow distribution valve 20 to introduce part of the steam into the auxiliary heating pipeline 80, and uses the residual heat of the steam to continuously insulate the main process pipeline 150, replacing electric heat tracing.

[0032] Tank filling mode: When the system produces a large amount of steam but the insulation requirement is low, the program controller will introduce the excess steam into the pressure control recovery tank 10 for storage.

[0033] Energy replenishment mode: When T1 is detected to be lower than the second set value (e.g., 30℃), indicating that the heat provided by the auxiliary heating pipeline 80 is insufficient, the program controller opens the energy replenishment control valve 110 to replenish the high-temperature steam / water mixture stored in the pressure control recovery tank 10 to the main process pipeline 150 of the heat exchange system, directly increasing the medium temperature and achieving efficient energy replenishment.

[0034] Pressure protection: Pressure sensor 140 at the inlet of pressure control recovery tank 10 monitors the pressure in real time. If P1 exceeds the safety value, the program controller can fully open the flow distribution valve 20 to the auxiliary heating pipeline 80 for emergency pressure relief to ensure system safety.

[0035] Compared with the prior art, the present invention has the following significant advantages: Creative integration for energy saving and consumption reduction: It integrates functions such as steam recovery, pressure stabilization, tank buffering, pipeline auxiliary heating and intelligent energy replenishment into one unit, transforming the originally wasted exhaust steam into a useful heat source for insulation and system supplementary energy, significantly reducing the energy consumption of electric heat tracing or gas heating.

[0036] Stable operation and improved efficiency: The design of the pressure regulating valve and control unit eliminates the fluctuations in system pressure and heat load caused by steam discharge, ensuring the continuous and stable operation of the main heat exchange equipment and improving the overall operating efficiency of the station.

[0037] Safe and reliable, eliminating hidden dangers: It transforms disorderly and dangerous high-temperature steam emissions into controllable and orderly recycling and utilization, completely eliminating the safety hazards and visual pollution caused by direct emissions.

[0038] Ingenious structure and strong practicality: It adopts a low-pressure thin pipe bypassing the main pipe, which is simple in structure, easy to install, low in investment cost, and has a significant heat preservation effect.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A steam recovery and flow stabilization insulation device for a heat exchange system in a gas transmission station, characterized in that, include: Steam recovery components, control unit, and auxiliary heating piping; The steam recovery assembly includes a pressure-controlled recovery tank, a flow distribution valve, and a pressure regulating valve; the outlet of the pressure regulating valve is connected to the inlet of the flow distribution valve via a pipe, and one outlet of the flow distribution valve is connected to the inlet of the pressure-controlled recovery tank via a pipe. The pressure-controlled recovery tank has a first outlet and a second outlet. The first outlet has a first check valve and is connected to the inlet of the auxiliary heating pipe. The second outlet has a second check valve and an energy replenishment control valve and is connected to the return pipeline or the water supply tank of the heat exchange system via a pipe. The control unit includes a programmable controller, a temperature sensor, and a pressure sensor; wherein, the temperature sensor is installed on the outer wall of the main process pipeline; the pressure sensor is disposed on the pipeline between the flow distribution valve and the pressure regulating valve; the signal inlet of the programmable controller is electrically connected to the temperature sensor and the pressure sensor, and its signal outlet is electrically connected to the flow distribution valve, the energy replenishment control valve, and the pressure regulating valve; the programmable controller controls the opening and closing or the opening degree of the flow distribution valve, the energy replenishment control valve, and the pressure regulating valve according to the detection signals of the temperature sensor and the pressure sensor; The auxiliary heating pipe is laid close to the outer wall of the main process pipe and is used to heat and insulate the main process pipe.

2. The apparatus according to claim 1, characterized in that, The flow distribution valve is an electric three-way regulating valve. Its inlet receives steam after pressure regulation, its first outlet is connected to the pressure control recovery tank through a pipeline, and its second outlet is connected to the auxiliary heating pipeline through a pipeline.

3. The apparatus according to claim 1, characterized in that, The pressure regulating valve is a self-operated pressure regulating valve or an electric regulating valve.

4. The apparatus according to claim 1, characterized in that, The steam recovery assembly also includes a safety valve and a first shut-off valve, the outlet of the safety valve being connected to the inlet of the first shut-off valve, and the outlet of the first shut-off valve being connected to the inlet of the pressure regulating valve.

5. The apparatus according to claim 1, characterized in that, The pressure-controlled recovery tank is covered with an insulation layer.

6. The apparatus according to claim 1, characterized in that, The auxiliary heating pipes are attached to the outer wall of the main process pipes in a parallel or spiral winding manner.

7. The apparatus according to claim 6, characterized in that, The auxiliary heating pipe is a metal pipe with a diameter of DN15-DN25.

8. The apparatus according to claim 2, characterized in that, A second shut-off valve is provided on the pipeline between the flow distribution valve and the auxiliary heating pipeline; a third shut-off valve is provided on the pipeline between the flow distribution valve and the pressure control recovery tank.

9. The apparatus according to claim 1, characterized in that, The program controller is configured to: when the temperature detected by the temperature sensor is lower than a first set threshold, control the flow distribution valve to distribute steam to the auxiliary heating pipeline; and when the temperature detected by the temperature sensor is lower than a second set threshold, control the opening of the energy replenishment control valve.

10. The apparatus according to any one of claims 1-9, characterized in that, The device is connected after the safety vent valve of the heat exchange equipment at the gas transmission station.

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