Non-condensable gas automatic separation system for ORC (organic Rankine cycle) equipment

Abstract

The utility model discloses an automatic non-condensable gas separation system for ORC (organic Rankine cycle) equipment. The automatic non-condensable gas separation system comprises a pipeline pump, a shell-and-tube heat exchanger, a mixed gas inlet stop valve, a non-condensable gas discharge regulating valve, a liquid discharge switch valve and a cooling water inlet regulating valve, oRC equipment is connected with the pipeline pump and the shell-and-tube heat exchanger, the pipeline pump is connected with the shell-and-tube heat exchanger, and the shell-and-tube heat exchanger is connected with a cooling water inlet pipeline, a cooling water outlet pipeline and a non-condensable gas discharge pipeline; the mixed gas inlet stop valve is arranged on a connecting pipeline between the pipeline pump and the shell-and-tube heat exchanger; the liquid discharge switch valve is arranged on a connecting pipeline between the ORC equipment and the shell-and-tube heat exchanger; and a cooling water inlet regulating valve and a non-condensable gas discharge regulating valve are respectively arranged on the cooling water inlet pipeline and the non-condensable gas discharge pipeline. The device has the advantages that whether the non-condensable gas is mixed in the ORC equipment or not can be detected, and the non-condensable gas in the ORC equipment can be automatically separated and discharged.

Description

Technical Field

[0001] This utility model relates to the field of gas separation technology, and in particular to an automatic non-condensable gas separation system for ORC equipment. Background Technology

[0002] Organic Rankine Cycle (ORC) waste heat power generation systems are larger in size than conventional fluorine systems, with more flange connections and maintenance interfaces between components. When the equipment is shut down, the organic working fluid inside may condense from a gaseous state to a liquid state at room temperature in winter. At this time, the equipment is under negative pressure, and outside air may enter the equipment through connecting flanges or process maintenance interfaces. However, air cannot undergo phase change heat transfer inside the equipment, thus affecting its power generation. This portion of air inside the equipment is called non-condensable gas.

[0003] Therefore, this utility model provides an automatic non-condensable gas separation system for ORC equipment to automatically separate non-condensable gases from the fluorine system of waste heat power generation equipment (ORC) and improve the performance of waste heat power generation equipment. Utility Model Content

[0004] The purpose of this invention is to provide an automatic non-condensable gas separation system for ORC equipment, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An automatic non-condensable gas separation system for an ORC (Organic Refrigerant Control) device includes a pipeline pump, a shell-and-tube heat exchanger, a mixed gas inlet shut-off valve, a non-condensable gas discharge regulating valve, a liquid discharge switch valve, and a cooling water inlet regulating valve. The ORC device is connected to the pipeline pump and the shell-and-tube heat exchanger. The shell-and-tube heat exchanger is connected to a cooling water inlet pipe, a cooling water outlet pipe, and a non-condensable gas discharge pipe. The mixed gas inlet shut-off valve is installed on the connecting pipe between the pipeline pump and the shell-and-tube heat exchanger. The liquid discharge switch valve is installed on the connecting pipe between the ORC device and the shell-and-tube heat exchanger. The cooling water inlet regulating valve and the non-condensable gas discharge regulating valve are respectively installed on the cooling water inlet pipe and the non-condensable gas discharge pipe.

[0007] Preferably, the ORC device is equipped with a nitrogen detection sensor.

[0008] Preferably, a pump outlet pressure sensor is installed on the connecting pipe between the pipeline pump and the mixed gas inlet shut-off valve.

[0009] Preferably, the shell-and-tube heat exchanger is equipped with a heat exchanger pressure sensor.

[0010] Preferably, the shell-and-tube heat exchanger is equipped with a liquid level sensor.

[0011] Preferably, a Freon detection sensor is installed on the non-condensable gas discharge pipe; along the gas flow direction inside the non-condensable gas discharge pipe, the Freon detection sensor is located downstream of the non-condensable gas discharge regulating valve.

[0012] Preferably, the system also includes a PLC module, and the pipeline pump, the mixed gas inlet shut-off valve, the non-condensable gas discharge regulating valve, the liquid discharge switch valve, the cooling water inlet regulating valve, the nitrogen detection sensor, the pump outlet pressure sensor, the heat exchanger pressure sensor, the liquid level sensor, and the Freon detection sensor are all connected to the PLC module.

[0013] The beneficial effects of this utility model are: 1. The automatic separation system provided by this utility model can separate non-condensable gases while the ORC equipment is running. 2. The automatic separation system provided by this utility model can detect whether non-condensable gases are mixed in the ORC equipment and automatically separate and discharge the non-condensable gases from the ORC equipment. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the automatic separation system in an embodiment of this utility model.

[0015] In the diagram: 1-Pipeline pump; 2-Pump outlet pressure sensor; 3-Mixed gas inlet shut-off valve; 4-Shell-and-tube heat exchanger; 5-Non-condensable gas regulating valve; 6-Freon detection sensor; 7-Liquid level sensor; 8-Heat exchanger pressure sensor; 9-Drain switch valve; 10-Cooling water inlet regulating valve; 11-Nitrogen detection sensor; 12-PLC module. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0017] In this embodiment, an automatic non-condensable gas separation system is provided for an Organic Rankine Cycle (ORC) waste heat power generation device to improve the performance of the waste heat power generation device. For example... Figure 1As shown, the automatic separation system includes a pipeline pump 1, a shell-and-tube heat exchanger 4, a mixed gas inlet shut-off valve 3, a non-condensable gas discharge regulating valve 5, a liquid discharge switch valve 9, and a cooling water inlet regulating valve 10. The ORC equipment is connected to the pipeline pump 1 and the shell-and-tube heat exchanger 4. The pipeline pump 1 is connected to the shell-and-tube heat exchanger 4, and the shell-and-tube heat exchanger 4 is connected to a cooling water inlet pipe, a cooling water outlet pipe, and a non-condensable gas discharge pipe. The mixed gas inlet shut-off valve 3 is installed on the connecting pipe between the pipeline pump 1 and the shell-and-tube heat exchanger 4. The liquid discharge switch valve 9 is installed on the connecting pipe between the ORC equipment and the shell-and-tube heat exchanger 4. The cooling water inlet regulating valve 10 and the non-condensable gas discharge regulating valve 5 are respectively installed on the cooling water inlet pipe and the non-condensable gas discharge pipe.

[0018] In this embodiment, a nitrogen detection sensor 11 is installed on the ORC equipment. A pump outlet pressure sensor 2 is installed on the connecting pipe between the pipeline pump 1 and the mixed gas inlet shut-off valve 3. A heat exchanger pressure sensor 8 is installed on the shell-and-tube heat exchanger 4. A liquid level sensor 7 is installed in the shell-and-tube heat exchanger 4. A Freon detection sensor 6 is installed on the non-condensable gas discharge pipe; along the gas flow direction in the non-condensable gas discharge pipe, the Freon detection sensor 6 is located downstream of the non-condensable gas discharge regulating valve.

[0019] The automatic separation system also includes a PLC module 12. The pipeline pump 1, the mixed gas inlet shut-off valve 3, the non-condensable gas discharge regulating valve 5, the liquid discharge switch valve 9, the cooling water inlet regulating valve 10, the nitrogen detection sensor 11, the pump outlet pressure sensor 2, the heat exchanger pressure sensor 8, the liquid level sensor 7, and the Freon detection sensor 6 are all connected to the PLC module 12.

[0020] In this embodiment, when air enters the ORC device, the automatic separation system automatically starts. First, the nitrogen detection sensor 11 detects the air entering the ORC device and transmits this signal to the PLC module 12. The PLC module 12 controls the mixed gas inlet shut-off valve 3 to open, and then starts the pipeline pump 1 to deliver the Freon gas and air together to the shell-and-tube heat exchanger 4. At the same time, the PLC module 12 controls the cooling water inlet regulating valve 10 to open. The initial opening degree of the cooling water inlet regulating valve 10 is preset in the PLC module 12, and then it can be automatically adjusted according to the pressure signal of the heat exchanger pressure sensor 8. The higher the pressure, the larger the opening degree. At this time, the Freon gas in the mixed gas cools and liquefies, while the air accumulates at the top of the shell-and-tube heat exchanger 4, realizing the separation of Freon gas and air. When the pressure value of the heat exchanger pressure sensor 8 reaches 50% of the pump outlet pressure sensor 2 (adjustable) or remains constant, the non-condensable gas regulating valve 5 opens to release the air accumulated at the top of the shell-and-tube heat exchanger 4. Then, when the refrigerant detection sensor 6 detects refrigerant, it indicates that the air has been purged, and the PLC module 12 controls the non-condensable gas regulating valve 5 to close. Simultaneously, when the liquid refrigerant in the shell-and-tube heat exchanger 4 reaches the set liquid level, the liquid level sensor 7 sends a signal to the PLC module 12 to control the drain valve 9 to open, allowing the liquid refrigerant to return to the ORC equipment. When the liquid level reaches the low point (adjustable), the drain valve 9 closes again to prevent air from returning to the ORC equipment. This process repeats until the nitrogen detection sensor 11 shows that there is no nitrogen in the equipment, indicating that the air in the ORC equipment has been completely purged, and the PLC module 12 controls the automatic separation system to stop working. This allows for automatic detection and separation of air within the ORC equipment during operation.

[0021] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0022] This invention provides an automatic non-condensable gas separation system for ORC (Organic Refrigerant Control) equipment, which can separate non-condensable gases while the ORC equipment is in operation. The automatic separation system can detect whether non-condensable gases have entered the ORC equipment and automatically separate and discharge the non-condensable gases from the ORC equipment.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic non-condensable gas separation system for ORC equipment, characterized in that: The system includes a pipeline pump, a shell-and-tube heat exchanger, a mixed gas inlet shut-off valve, a non-condensable gas discharge regulating valve, a liquid discharge switch valve, and a cooling water inlet regulating valve. The ORC (Organic Refrigerant Control) equipment is connected to the pipeline pump and the shell-and-tube heat exchanger. The shell-and-tube heat exchanger is connected to a cooling water inlet pipe, a cooling water outlet pipe, and a non-condensable gas discharge pipe. The mixed gas inlet shut-off valve is located on the connecting pipe between the pipeline pump and the shell-and-tube heat exchanger. The liquid discharge switch valve is located on the connecting pipe between the ORC equipment and the shell-and-tube heat exchanger. The cooling water inlet regulating valve and the non-condensable gas discharge pipe are respectively equipped with a non-condensable gas discharge regulating valve.

2. The automatic non-condensable gas separation system for ORC equipment according to claim 1, characterized in that: The ORC device is equipped with a nitrogen detection sensor.

3. The automatic non-condensable gas separation system for ORC equipment according to claim 2, characterized in that: A pump outlet pressure sensor is installed on the connecting pipe between the pipeline pump and the mixed gas inlet shut-off valve.

4. The automatic non-condensable gas separation system for ORC equipment according to claim 3, characterized in that: The shell-and-tube heat exchanger is equipped with a heat exchanger pressure sensor.

5. The automatic non-condensable gas separation system for ORC equipment according to claim 4, characterized in that: The shell-and-tube heat exchanger is equipped with a liquid level sensor.

6. The automatic non-condensable gas separation system for ORC equipment according to claim 5, characterized in that: A Freon detection sensor is installed on the non-condensable gas emission pipeline; along the gas flow direction inside the non-condensable gas emission pipeline, the Freon detection sensor is located downstream of the non-condensable gas emission regulating valve.

7. The automatic non-condensable gas separation system for ORC equipment according to claim 6, characterized in that: It also includes a PLC module, and the pipeline pump, the mixed gas inlet shut-off valve, the non-condensable gas discharge regulating valve, the liquid discharge switch valve, the cooling water inlet regulating valve, the nitrogen detection sensor, the pump outlet pressure sensor, the heat exchanger pressure sensor, the liquid level sensor, and the Freon detection sensor are all connected to the PLC module.

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