A new compressor venting and blowdown system

Abstract

The application discloses a novel compressor emptying and blowdown system, which comprises an inert gas input end connected to a seal and a spacer of at least one cylinder end through two pipelines, and a pressure regulating valve is arranged on the two pipelines connected by the inert gas input end for regulating the pressure of the pipeline, and the pressure of the two pipelines is not equal; the system further comprises a blowdown tank, the seal of the at least one cylinder end is connected to the blowdown tank through a blowdown pipeline, and is discharged into the blowdown tank through the upper part, gas is directly discharged, and liquid flows into the blowdown tank; the spacer of the at least one cylinder end is connected to the blowdown pipeline through an emptying pipeline, and is sunk into the lower part of the blowdown tank, liquid is left in the blowdown tank through liquid sealing, and gas enters the upper part of the blowdown tank. The application has the advantages of inert gas multi-pressure inflation, timely reflection of abnormal leakage, discharge of low-pressure gas into a high-pressure pipeline network, overpressure protection of the spacer and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical equipment. More particularly, the present application relates to a novel compressor venting and blowdown system. BACKGROUND

[0002] Due to the movement and sealing characteristics of the compressor, some gas leakage and oil pollution are inevitable. If the leakage gas and oil pollution cannot be discharged in time, it will cause the accumulation of dangerous sources, or leak into the crankcase, endangering the safety of equipment and personnel.

[0003] For this problem, some manufacturers use inert gas flushing to reduce sealing leakage, but the pressure control is not accurate, which may cause overpressure of the spacer, and the leakage gas is generally discharged locally, which has safety and environmental risk. SUMMARY

[0004] An object of the present application is to provide a novel compressor venting and blowdown system, which has the advantages of inert gas multi-pressure charging, timely reflection of abnormal leakage, low-pressure gas can be discharged into high-pressure pipe network, and spacer can be overpressure protected.

[0005] In order to solve the above technical problems, the present application provides a novel compressor venting and blowdown system, which comprises an inert gas input end connected to the sealing member and the spacer of at least one cylinder end through two pipelines, a pressure regulating valve is arranged on each of the two pipelines connected to the inert gas input end for regulating the pressure of the pipeline, and the pressures of the two pipelines are not equal; a blowdown tank is further provided, the sealing member of at least one cylinder end is connected to the blowdown tank through a blowdown pipeline, and the gas is directly discharged and the liquid flows into the blowdown tank through the upper part; the spacer of at least one cylinder end is connected to the blowdown pipeline through a venting pipeline and sinks into the lower part of the blowdown tank, and the liquid is left in the blowdown tank and the gas enters the upper part of the blowdown tank through liquid seal.

[0006] Preferably, a flow sensor is arranged on each of the two pipelines connected to the inert gas input end, and a pressure sensor is arranged in front of the pressure regulating valve, and the pressure regulating valve adjusts the pressure size through the feedback of the pressure sensor.

[0007] Preferably, the pressure of each of the two pipelines connected to the inert gas input end is reduced, and the pressure charged into each sealing member of each cylinder end is greater than the pressure charged into each spacer of each cylinder end.

[0008] Preferably, a temperature sensor is arranged on each of the blowdown pipelines corresponding to the plurality of cylinder ends.

[0009] Preferably, two liquid level switches are arranged on the blowdown tank to monitor the high and low liquid levels respectively; and a pressure sensor is arranged on the blowdown tank to monitor the pressure of the blowdown tank.

[0010] Preferably, the blowdown tank is connected to a low-pressure vent through an outlet pipeline, and a safety valve is further connected in parallel to the outlet pipeline.

[0011] Preferably, an ejector is further connected in parallel to the outlet pipeline, and the ejector is connected to external high-pressure gas through an ejector pipeline.

[0012] Preferably, a high-pressure gas regulating valve is arranged on the ejector pipeline, and the high-pressure gas regulating valve is interlocked with a pressure sensor arranged on the blowdown tank to realize synchronous adjustment of opening and closing size.

[0013] Preferably, a blowdown pump is further arranged at the bottom of the blowdown tank.

[0014] Preferably, a control system is further included, which is used to acquire data of each pressure sensor, flow sensor, temperature sensor and liquid level switch, and the control system is further used to control opening and closing and opening size of the pressure regulating valve, the safety valve, the high-pressure gas regulating valve and the blowdown pump; the control system controls the pressure regulating valve to reduce pressure to a set pressure value by acquiring pressure sensor data of two pipelines corresponding to the inert gas input end; the control system monitors temperature sensor data of the blowdown pipeline and compares the temperature sensor data with a set threshold value, and if the temperature sensor data exceeds the threshold value, an alarm is given; the control system monitors liquid level switch data of the blowdown tank and compares the liquid level switch data with a set threshold value, and if the liquid level exceeds a maximum value or is less than a minimum value, an alarm is given, and if the liquid level exceeds the maximum value, the control system controls the blowdown pump to start blowdown; the control system monitors pressure sensor data of the blowdown tank, and compares the pressure sensor data with a set pressure bearing of the spacer, and if a data difference is within a set range, the safety valve is controlled to jump, and low-pressure gas is introduced into the low-pressure vent pipeline; the control system controls the high-pressure gas regulating valve and the blowdown tank pressure sensor to change in a synchronous proportional manner.

[0015] The present application at least includes the following beneficial effects:

[0016] 1. The present application uses nitrogen and other inert gases to charge the unit at two pressures to form a slight positive pressure and reduce gas leakage. The low-pressure part of the charge is vented and blowdown into a manifold, and then discharged into a blowdown tank through a liquid seal; the high-pressure part of the charge is directly blowdown into the blowdown tank. The gas in the blowdown tank is discharged into a vent pipeline through high-pressure gas injection, and the liquid is discharged by a blowdown pump, so that low-pressure gas is discharged into a closed pipeline network, which is safe and environmentally friendly.

[0017] 2. The system of this invention is equipped with high-pressure sewage discharge temperature detection via a temperature sensor; it also includes inert gas flow detection, low-pressure venting gas flow detection, and a low-pressure venting pipeline safety valve. Through high-pressure ejection, leaking low-pressure gas (i.e., the mixed gas leading to the sewage tank) can be introduced into the high-pressure venting pipeline after the low-pressure venting port, ensuring smooth discharge even if the leaking low-pressure gas pressure is high. High-pressure sewage discharge temperature and flow detection can promptly detect and reflect sealing abnormalities, protecting the spacer components from overpressure. The high-pressure gas flow regulating valve PCV1601 can dynamically adjust the high-pressure ejector gas consumption, reducing consumption and saving energy.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the system structure of the present invention. Detailed Implementation

[0020] To better understand the purpose, structure, and function of this invention, the invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0021] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1 As shown, this invention provides a novel compressor venting and sewage discharge system, including an inert gas input end, which is connected to a seal and a spacer at at least one cylinder end via two pipelines. Each of the two pipelines connected to the inert gas input end is equipped with a pressure regulating valve to adjust the pressure of the pipelines, and the pressures on the two pipelines are unequal. It also includes a sewage discharge tank. The seal at least one cylinder end is connected to the sewage discharge tank via a sewage discharge pipeline, and the gas is directly discharged while the liquid flows into the sewage discharge tank. The spacer at least one cylinder end is connected to the sewage discharge pipeline via a venting pipeline and is submerged in the lower part of the sewage discharge tank. Through a liquid seal, the liquid remains in the sewage discharge tank, while the gas enters the upper part of the sewage discharge tank.

[0023] The two pipelines connected to the inert gas input end are provided with flow sensors, and a pressure sensor is arranged in front of the pressure regulating valve to feed back the pressure regulated by the pressure regulating valve. The pressures in the two pipelines connected to the inert gas input end are reduced by pressure regulating, and the pressure in each sealing element at the end of each cylinder is greater than the pressure in each spacing element at the end of each cylinder.

[0024] A temperature sensor is arranged on each of the plurality of cylinder end corresponding blowdown pipelines. Two liquid level switches are arranged on the blowdown tank to monitor the high and low liquid levels respectively. A pressure sensor is arranged on the blowdown tank to monitor the pressure of the blowdown tank. A blowdown pump is further arranged at the bottom of the blowdown tank.

[0025] The blowdown tank is connected to a low-pressure venting port through a blowdown pipeline, and a safety valve is further connected in parallel on the blowdown pipeline. An eductor is further connected in parallel on the blowdown pipeline, which is connected to external high-pressure eductor gas through an eductor pipeline. A high-pressure eductor gas regulating valve is arranged on the eductor pipeline, which is interlocked with the pressure sensor arranged on the blowdown tank to realize synchronous adjustment of the opening and closing size.

[0026] A control system is further included for acquiring data of each pressure sensor, flow sensor, temperature sensor, and liquid level switch. The control system is further used to control the opening and closing and opening size of the pressure regulating valve, safety valve, high-pressure eductor gas regulating valve, and blowdown pump. The control system controls the pressure regulating valve to reduce the pressure to a set pressure value by acquiring the pressure sensor data of the two pipelines corresponding to the inert gas input end. The control system monitors the temperature sensor data of the blowdown pipeline and compares it with a set threshold value, and if the threshold value is exceeded, an alarm is given. The control system monitors the liquid level switch data of the blowdown tank and compares it with a set threshold value, and if the liquid level exceeds the maximum value or is less than the minimum value, an alarm is given, and if the liquid level exceeds the maximum value, the control system controls the blowdown pump to start blowdown. The control system monitors the pressure sensor data of the blowdown tank and compares it with a set spacing element pressure, and if the data difference is within a set range, the safety valve is controlled to jump, and low-pressure gas is introduced into the low-pressure venting port pipeline. The control system controls the high-pressure eductor gas regulating valve and the blowdown tank pressure sensor to change in a synchronous proportional manner.

[0027] Embodiment (with two cylinder ends as an example):

[0028] As Figure 1As shown, the inert gas is divided into two paths, one path is configured with flow sensor FT-1601, pressure regulating valve PCV-1601, pressure sensor PT-1601, and the pressure is reduced to P1 through the pressure reducing valve (pressure regulating valve PCV-1601); one path is configured with flow sensor FT-1602, pressure regulating valve PCV-1602, pressure sensor PT-1602, and the pressure is reduced to P2 through the pressure reducing valve (pressure regulating valve PCV-1602); wherein P1 is greater than P2. P1 pressure gas fills each seal at each cylinder end, and P2 pressure gas fills each spacer at each cylinder end. If the pressure changes after pressure regulation, the pressure sensor PT-1601 and the pressure sensor PT-1602 can feedback in time.

[0029] Temperature sensor TT-1601 and temperature sensor TT-1602 are respectively arranged on the seal drain pipeline between the two cylinder ends and the blowdown tank, and are discharged into the blowdown tank V-1601 through the upper part; the gas is directly discharged, and the liquid flows into the blowdown tank. The spacer vent pipeline is merged into the blowdown pipeline and sinks into the lower part of the blowdown tank, and through the liquid seal, the liquid remains in the blowdown tank, and the gas enters the upper part of the blowdown tank.

[0030] When the seal leakage increases, the temperature sensor TT-1601 or the temperature sensor TT-1602 feedbacks the temperature rise due to the high temperature of the compressor exhaust gas and the temperature rise of the blowdown pipeline. The blowdown tank is provided with liquid level switches LSL-101, LSH-102 and pressure sensor PT-1603, and when the liquid level on the low pressure side is too high or too low, or the blowdown tank pressure is too high, timely alarm is performed.

[0031] The gas side of the blowdown tank is provided with flow sensor FT-1603, safety valve PSV-1601, ejector, high pressure injection gas regulating valve PCV-1601, and each ball valve VL, each one-way valve VC, and pressure gauge PG. When the blowdown tank pressure is too high and approaches the pressure bearing of the spacer, the safety valve PSV-1601 jumps, and the gas is discharged into the low pressure vent; the high pressure injection gas passes through the ejector and enters the low pressure vent pipeline through the "Venturi effect", realizing that even if the pressure of the leaked low pressure gas is high, it can also be smoothly discharged. The high pressure injection gas regulating valve PCV-1601 is interlocked with the blowdown tank pressure sensor PT-1603, and when the blowdown tank pressure increases, the regulating valve opening increases, and when the blowdown tank pressure decreases, the regulating valve opening decreases, reducing the consumption of high pressure injection gas. When the seal leakage increases, the gas flow FT-1603 and the blowdown tank pressure PT-1603 increase.

[0032] When there is more liquid in the blowdown tank, the liquid level switch LSH-102 alarms, prompting the liquid to be discharged through the blowdown pump P-1601.

[0033] It is to be understood that the present application is described by way of example only, and that modifications or alterations can be made to the features and embodiments described without departing from the spirit and scope of the application. Although embodiments of the present application have been disclosed in connection with the enumerated embodiments, the present application is not limited to those embodiments. Rather, it is intended to embrace all alternatives, modifications and substitutions as is permitted by the scope of the claims and equivalents thereof.

Claims

1. A novel compressor venting and sewage discharge system, characterized in that, It includes an inert gas inlet, which is connected to a seal and a spacer at at least one cylinder end via two pipelines. Each of the two pipelines connected to the inert gas inlet is equipped with a pressure regulating valve to adjust the pressure of the pipeline. The pressures on the two pipelines are not equal. It also includes a drain tank. The seal at at least one cylinder end is connected to the drain tank via a drain pipeline and is discharged into the drain tank from the top. Gas is discharged directly and liquid flows into the drain tank. The spacer at at least one cylinder end is connected to the drain pipeline via a vent pipeline and is submerged in the lower part of the drain tank. Through a liquid seal, the liquid remains in the drain tank and the gas enters the upper part of the drain tank. Flow sensors are installed on both pipelines connected to the inert gas inlet, and a pressure sensor is installed in front of the pressure regulating valve. The pressure sensor provides feedback on the pressure adjusted by the pressure regulating valve. The sewage tank is connected to a low-pressure vent via a discharge pipeline, and a safety valve is also connected in parallel on the discharge pipeline. An ejector is also connected in parallel on the discharge pipeline, which is connected to external high-pressure ejector gas through the ejector pipeline; A high-pressure ejector gas regulating valve is installed on the ejector pipeline, which is interlocked with the pressure sensor installed on the sewage tank to achieve synchronous adjustment of the opening and closing size.

2. The novel compressor venting and sewage discharge system as described in claim 1, characterized in that, The pressure on both pipelines connected to the inert gas inlet is reduced, and the pressure on each seal at each cylinder end is greater than the pressure on each spacer at each cylinder end.

3. The novel compressor venting and sewage discharge system as described in claim 1, characterized in that, Temperature sensors are installed on the drain lines corresponding to the cylinder ends.

4. The novel compressor venting and sewage discharge system as described in claim 3, characterized in that, The sewage tank is equipped with two liquid level switches to monitor the high and low liquid levels respectively; the sewage tank is also equipped with a pressure sensor to monitor the pressure of the sewage tank.

5. The novel compressor venting and sewage discharge system as described in claim 4, characterized in that, A sewage pump is also installed at the bottom of the sewage tank.

6. The novel compressor venting and sewage discharge system as described in claim 5, characterized in that, The system also includes a control system for acquiring data from various pressure sensors, flow sensors, temperature sensors, and level switches. This control system also controls the opening and closing of pressure regulating valves, safety valves, high-pressure ejector gas regulating valves, and sewage pumps, as well as the degree of opening. The control system controls the pressure regulating valves to reduce pressure to a set value by acquiring pressure sensor data from the two pipelines corresponding to the inert gas input end. The control system monitors temperature sensor data on the sewage pipeline and compares it with a set threshold; if the threshold is exceeded, an alarm is triggered. The control system monitors level switch data on the sewage tank and compares it with a set threshold; if the level exceeds the maximum value or is less than the minimum value, an alarm is triggered, and if the level exceeds the maximum value, the control system controls the sewage pump to start discharging sewage. The control system monitors pressure sensor data corresponding to the sewage tank and compares it with a set pressure bearing capacity; if the data difference is within a set range, the control system activates the safety valve, introducing low-pressure gas into the low-pressure vent pipeline. The control system controls the high-pressure ejector gas regulating valve to change its opening size synchronously with the sewage tank pressure sensor.

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