Return gas temperature regulation and control system of reciprocating compressor system

Abstract

The utility model discloses a return gas temperature regulation and control system of a reciprocating compressor system, which comprises an air inlet pipeline and an inlet washing tank, the air inlet pipeline is communicated with an air inlet of the inlet washing tank, and an air outlet of the inlet washing tank is communicated with an air inlet of an inlet buffer tank. An air outlet of the inlet buffer tank is communicated with an air inlet of the reciprocating compressor, an air outlet of the reciprocating compressor is communicated with an air inlet of the outlet buffer tank, an exhaust port of the outlet buffer tank is communicated with an air inlet of the cooler through an air outlet pipeline of the outlet buffer tank, and the cooler is communicated with an exhaust pipeline. According to the return gas temperature regulation and control system of the reciprocating compressor system, an outlet buffer tank gas outlet pipeline is connected with a return gas inlet pipeline through a hot return pipeline, a return temperature control valve is arranged on the hot return pipeline, and a pressure transmitter is installed on an inlet washing tank. Signals of the pressure transmitter are used for controlling the valve opening degree of the backflow pressure control valve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of ocean engineering, especially relates to a reciprocating compressor system backflow gas temperature regulation system. BACKGROUND

[0002] Reciprocating compressor is widely used in ocean platform because of its wide adaptability, strong reliability, convenient operation and maintenance and other advantages. The compressor system of ocean platform is usually composed of an inlet washing tank, a compressor and an outlet heat exchanger. In order to facilitate the adjustment of the pressure and flow of the compressor system, a backflow system is usually provided, a backflow pipeline is connected to the outlet pipeline of the heat exchanger and the inlet pipeline of the washing tank, and a backflow pressure control valve is installed. When the inlet pressure of the compressor is too low or the outlet pressure of the compressor is too high, the backflow control valve is opened, and part of the natural gas at the outlet of the heat exchanger is depressurized and backflows to the inlet, thereby increasing the inlet pressure of the compressor or reducing the outlet pressure of the compressor.

[0003] Since the discharge pressure of the conventional compressor system is low, throttling and pressure reduction will not cause low temperature and freezing, so the temperature of the backflow natural gas is not considered. However, in recent years, with the increase of high pressure / ultra-high pressure compressor projects and high CO2-containing natural gas compressor projects on ocean platforms, the discharge pressure of some compressor systems even reaches 50 MPag, and the low temperature and freezing caused by the backflow pressure regulation process cannot be ignored.

[0004] Therefore, there is an urgent need to design a reciprocating compressor system backflow gas temperature regulation system to solve the problem of low temperature and freezing caused by the backflow pressure regulation process mentioned above. SUMMARY

[0005] To solve the technical problem of the increase of high pressure / ultra-high pressure compressor projects and high CO2-containing natural gas compressor projects on ocean platforms mentioned in the background, a reciprocating compressor system backflow gas temperature regulation system is provided to solve the problem of low temperature and freezing caused by the backflow pressure regulation process.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the reciprocating compressor system backflow gas temperature regulation system of the utility model is as follows:

[0007] A reciprocating compressor system backflow gas temperature regulation system, comprising an inlet pipeline and an inlet washing tank, the inlet pipeline being in communication with the inlet of the inlet washing tank, the outlet of the inlet washing tank being in communication with the inlet of an inlet buffer tank, the outlet of the inlet buffer tank being in communication with the inlet of a reciprocating compressor, the outlet of the reciprocating compressor being in communication with the inlet of an outlet buffer tank, the outlet of the outlet buffer tank being in communication with the inlet of a cooler through an outlet buffer tank outlet pipeline, and the cooler being in communication with an exhaust pipeline.

[0008] Further, a main reflux pipeline is arranged between the gas inlet pipeline and the gas outlet pipeline, the main reflux pipeline is composed of a main reflux gas inlet pipeline and a main reflux gas outlet pipeline, the main reflux gas inlet pipeline and the main reflux gas outlet pipeline are connected through a reflux pressure control valve, and a temperature transmitter and a pressure transmitter are installed on the main reflux gas outlet pipeline.

[0009] Further, a hot reflux pipeline is arranged between the gas outlet pipeline of the outlet buffer tank and the main reflux gas inlet pipeline, and a reflux temperature control valve is arranged on the hot reflux pipeline.

[0010] Further, high-pressure and high-temperature natural gas in the gas outlet pipeline of the outlet buffer tank is mixed with high-pressure and low-temperature natural gas in the main reflux gas inlet pipeline to enter a mixer buffer tank, and after being uniformly mixed in the mixer buffer tank, the high-pressure and high-temperature natural gas flows to the reflux pressure control valve.

[0011] Further, a signal of the temperature transmitter is used to regulate the valve opening degree of the reflux temperature control valve, the temperature transmitter is installed at a position close to the reflux pressure control valve, and a normal operation temperature of the temperature transmitter is consistent with the inlet gas temperature of the reciprocating compressor.

[0012] Further, the temperature transmitter sets an alarm threshold, and when the outlet temperature of the reflux pressure control valve is higher or lower than the threshold, the compressor system alarms.

[0013] Further, the temperature transmitter is installed at a position close to the inlet washing tank, and the temperature transmitter sets a shutdown threshold, and when the outlet temperature of the reflux pressure control valve is higher than the threshold, the compressor system is shut down.

[0014] Further, a main reflux gas inlet pipeline one-way valve should be installed at the inlet of the main reflux gas inlet pipeline to prevent the hot reflux natural gas from flowing in the reverse direction.

[0015] Further, a hot reflux pipeline one-way valve should be installed at the outlet of the temperature reflux control valve to prevent the reflux natural gas from flowing in the reverse direction.

[0016] Further, a mixed gas buffer tank is arranged between the hot reflux pipeline and the reflux pressure control valve to ensure that the hot reflux natural gas and the cold reflux natural gas can be uniformly mixed before passing through the reflux pressure control valve.

[0017] The reciprocating compressor system reflux gas temperature regulation system has the following advantages:

[0018] The outlet buffer tank gas outlet pipeline is connected with the backflow gas inlet pipeline through a heat backflow pipeline, a backflow temperature control valve inlet is arranged on the heat backflow pipeline, a pressure transmitter is arranged on the outlet buffer tank, the signal of the pressure transmitter is used for controlling the valve opening degree of the backflow pressure control valve, a temperature transmitter is arranged on the gas outlet of the backflow pressure control valve, the signal of the temperature transmitter is used for controlling the valve opening degree of the backflow temperature control valve, when the temperature transmitter monitors that the gas temperature is lower than the set temperature, the backflow temperature control valve increases the valve opening degree, the heat gas flow of the backflow pipeline is increased, and the effect of controlling the outlet temperature of the backflow pressure control valve is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model discloses a reciprocating compressor system backflow gas temperature regulation system's process flow diagram.

[0020] Mark explanation in the drawing:

[0021] 1, gas inlet pipeline, 2, inlet washing tank, 3, inlet buffer tank, 4, reciprocating compressor, 5, outlet buffer tank, 6, outlet buffer tank gas outlet pipeline, 7, cooler, 8, exhaust pipeline, 9, main backflow gas inlet pipeline, 10, main backflow gas inlet pipeline check valve, 11, heat backflow pipeline check valve, 12, backflow pressure control valve, 13, temperature transmitter, 14, main backflow gas outlet pipeline, 15, temperature transmitter, 16, pressure transmitter, 17, heat backflow pipeline, 18, backflow temperature control valve, 19, mixed gas buffer tank. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0023] The person skilled in the art can understand that the combination of the features of different embodiments means being within the scope of the utility model and forming different embodiments, although some embodiments include certain features in other embodiments instead of other features. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0024] The following will refer to the drawings Figure 1 The reciprocating compressor system backflow gas temperature regulation system of the utility model is described.

[0025] As Figure 1As shown, the reciprocating compressor system backflow gas temperature regulation system in the utility model includes air inlet pipeline 1 and entrance washing tank 2, air inlet pipeline 1 is communicated with the air inlet of entrance washing tank 2, the air outlet of entrance washing tank 2 is communicated with the air inlet of entrance buffer tank 3, the air outlet of entrance buffer tank 3 is communicated with the air inlet of reciprocating compressor 4, the air outlet of reciprocating compressor 4 is communicated with the air inlet of outlet buffer tank 5, the air outlet of outlet buffer tank 5 is communicated with the air inlet of cooler 7 through outlet buffer tank outlet gas pipeline 6, cooler 7 is communicated with exhaust pipe 8 line.

[0026] Through outlet buffer tank outlet gas pipeline 6 and backflow air inlet pipeline, heat backflow pipeline 47 is connected, heat backflow pipeline 17 is provided with backflow temperature control valve 18 on it, pressure transmitter 16 is installed on entrance washing tank 2, the signal of pressure transmitter 16 is used to control the valve opening of backflow pressure control valve 12, temperature transmitter 15 is installed on the air outlet of backflow pressure control valve 12, the signal of temperature transmitter 15 is used to control the valve opening of backflow temperature control valve 18, when temperature transmitter 15 monitors that the gas temperature is lower than the set temperature, backflow temperature control valve 18 will increase the valve opening, by increasing the hot gas flow of backflow pipeline, the effect of controlling the outlet temperature of backflow pressure control valve 12 is achieved.

[0027] Further, as shown, Figure 1 The air inlet pipeline 1 and the exhaust pipeline are provided with a main backflow pipeline, the main backflow pipeline is composed of a main backflow air inlet pipeline 9 and a main backflow air outlet pipeline 14, the main backflow air inlet pipeline 9 and the main backflow air outlet pipeline 14 are connected through a backflow pressure control valve 12, a temperature transmitter 13 and a pressure transmitter 16 are installed on the main backflow air outlet pipeline 14; a heat backflow pipeline 17 is arranged between the outlet buffer tank 6 air outlet pipeline and the main backflow air inlet pipeline 9, and a backflow temperature control valve 18 is arranged on the heat backflow pipeline 17; the high-pressure high-temperature natural gas of the outlet buffer tank 6 air outlet pipeline mixes with the high-pressure low-temperature natural gas in the main backflow air inlet pipeline 9 to enter a mixer buffer tank 19, and then flows to the backflow pressure control valve 12 after being uniformly mixed in the mixer buffer tank 19.

[0028] In this embodiment, preferably, the natural gas enters the entrance washing tank 2 through the air inlet pipeline 1 to remove liquid and solid particle impurities, and then enters the entrance buffer tank 3, is pressurized in the reciprocating compressor 4, and is discharged from the outlet buffer tank 5; the high-pressure natural gas discharged from the outlet buffer tank 5 has a high temperature, is then cooled in the cooler 7, and is then discharged through the exhaust pipeline 8.

[0029] A main backflow pipeline is arranged between the air inlet pipeline 1 and the exhaust pipeline 8, the main backflow pipeline is composed of a main backflow air inlet pipeline 9 and a main backflow air outlet pipeline 14, the main backflow air inlet pipeline 9 and the main backflow air outlet pipeline 14 are connected through a backflow pressure control valve 12, and the high-pressure low-temperature natural gas from the exhaust pipeline 8 flows to the air inlet pipeline 1 through the main backflow pipeline.

[0030] A heat reflux pipeline 17 is arranged between the outlet buffer tank gas outlet pipeline 6 and the main reflux gas inlet pipeline 9, and a reflux temperature control valve 18 is arranged on the heat reflux pipeline 17. High-pressure and high-temperature natural gas from the outlet buffer tank gas outlet pipeline 6 and high-pressure and low-temperature natural gas in the main reflux gas inlet pipeline 9 enter a mixer buffer tank 19, and then flow to the reflux pressure control valve 12 after being uniformly mixed in the mixer buffer tank 19.

[0031] Further, as shown in Figure 1 , the signal of the temperature transmitter 13 is used to regulate the valve opening degree of the reflux temperature control valve 12. The temperature transmitter 13 is arranged close to the reflux pressure control valve 12, and the normal operation temperature of the temperature transmitter 13 is consistent with the inlet temperature of the reciprocating compressor 4. When the outlet temperature of the reflux pressure control valve 12 is higher or lower than the threshold value, the compressor system is alarmed. The temperature transmitter 16 is arranged close to the inlet washing tank 2, and the temperature transmitter 16 is arranged with a shutdown threshold value. When the outlet temperature of the reflux pressure control valve 12 is higher than the threshold value, the compressor system is shut down.

[0032] In this embodiment, preferably, a temperature transmitter 13 is arranged at the outlet of the reflux pressure control valve 12. The signal monitored by the temperature transmitter 13 controls the valve opening degree of the temperature reflux control valve 18, which is used to adjust the flow of the heat reflux natural gas. The temperature transmitter 13 should be arranged as close to the reflux pressure control valve 12 as possible to ensure accurate temperature monitoring.

[0033] Preferably, a temperature transmitter 15 is arranged on the main reflux gas outlet pipeline 14. When the temperature transmitter 15 monitors that the temperature of the natural gas in the main reflux gas outlet pipeline 14 is higher than the set threshold value, the entire compressor system needs to be shut down to ensure the safety of the compressor system. The temperature transmitter 15 should be arranged as close to the inlet pipeline 1 as possible to ensure accurate temperature monitoring.

[0034] Further, as shown in Figure 1 , a main reflux gas inlet pipeline check valve 10 is arranged at the inlet of the main reflux gas inlet pipeline 9 to prevent the heat reflux natural gas from flowing in the reverse direction. A heat reflux pipeline check valve 11 is arranged at the outlet of the temperature reflux control valve 18 to prevent the reflux natural gas from flowing in the reverse direction. A mixed gas buffer tank 19 is arranged between the heat reflux pipeline 17 and the reflux pressure control valve 12 to ensure that the heat reflux natural gas and the cold reflux natural gas can be uniformly mixed before passing through the reflux pressure control valve 12.

[0035] In this embodiment, preferably, a hot reflux pipeline non-return valve 11 should be installed at the outlet of the temperature reflux control valve 18 to prevent the reflux natural gas from flowing in the reverse direction; a main reflux intake pipeline non-return valve 10 should be installed at the inlet of the main reflux intake pipeline 9 to prevent the hot reflux natural gas from flowing in the reverse direction.

[0036] Preferably, a mixed gas buffer tank 19 should be directly arranged between the hot reflux pipeline 17 and the reflux pressure control valve 12 to ensure that the hot reflux natural gas can be mixed uniformly with the cold reflux natural gas before passing through the reflux pressure control valve 12; if the mixed gas buffer tank 19 cannot be arranged due to factors such as site area limitation, the connection point of the hot reflux pipeline 17 and the main reflux pipeline should be ensured to be far enough from the reflux pressure control valve 12.

[0037] The working principle of the reciprocating compressor system reflux gas temperature regulation system in the utility model is as follows:

[0038] When the pressure transmitter 16 monitors that the pressure at the inlet washing tank 2 is lower than the operating pressure, the reflux pressure control valve 12 is opened, and the valve opening degree of the reflux pressure control valve 12 is adjusted according to the signal transmitted by the pressure transmitter 16 to ensure that the pressure at the inlet washing tank 2 reaches the normal working pressure.

[0039] When the temperature transmitter 13 monitors that the natural gas temperature at the main reflux outlet pipeline 14 is lower than the set temperature, the reflux temperature control valve 18 is opened, and the valve opening degree of the reflux temperature control valve 18 is adjusted according to the signal transmitted by the temperature transmitter 13; the temperature of the mixed hot reflux natural gas and cold reflux natural gas is higher than the temperature of the cold reflux natural gas, the natural gas temperature passing through the reflux pressure control valve 12 is consistent with the normal working temperature of the reciprocating compressor 4, and low temperature and freezing are avoided in the main reflux outlet pipeline 14, the inlet washing tank 2 and the like, so that the compressor system can stably operate.

[0040] Based on the reciprocating compressor system reflux gas temperature regulation system, the utility model connects the outlet buffer tank 5 outlet pipeline and the reflux intake pipeline through the hot reflux pipeline, installs the pressure transmitter 16 on the inlet washing tank 3 of the hot reflux pipeline 17, uses the signal of the pressure transmitter 16 to control the valve opening degree of the reflux pressure control valve 12, installs the temperature transmitter 15 at the outlet of the reflux pressure control valve 12, uses the signal of the temperature transmitter 15 to control the valve opening degree of the reflux temperature control valve 18, and when the temperature transmitter 15 monitors that the gas temperature is lower than the set temperature, the reflux temperature control valve 18 can increase the valve opening degree, the hot gas flow of the reflux pipeline is increased, and the effect of controlling the outlet temperature of the reflux pressure control valve 12 is achieved.

[0041] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A reciprocating compressor system backflow gas temperature regulation system, characterized by, The inlet pipeline is communicated with the gas inlet of the inlet washing tank, the gas outlet of the inlet washing tank is communicated with the gas inlet of the inlet buffer tank, the gas outlet of the inlet buffer tank is communicated with the gas inlet of the reciprocating compressor, the gas outlet of the reciprocating compressor is communicated with the gas inlet of the outlet buffer tank, and the gas outlet of the outlet buffer tank is communicated with the gas inlet of the cooler through the outlet buffer tank gas pipeline. The heat return pipeline is provided between the outlet buffer tank gas pipeline and the main return gas pipeline, and a return temperature control valve is arranged on the heat return pipeline.

2. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, The main return pipeline is composed of a main return gas pipeline and a main return gas outlet pipeline, the main return gas pipeline and the main return gas outlet pipeline are connected through a return pressure control valve, and a temperature transmitter and a pressure transmitter are installed on the main return gas outlet pipeline.

3. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, The high-pressure and high-temperature natural gas in the outlet buffer tank gas pipeline and the high-pressure and low-temperature natural gas in the main return gas pipeline are mixed into the mixer buffer tank, and then flow to the return pressure control valve after being uniformly mixed in the mixer buffer tank.

4. The reciprocating compressor system backflow gas temperature regulation system of claim 2, wherein, The signal of the temperature transmitter is used to regulate the valve opening degree of the return temperature control valve, the temperature transmitter is installed near the return pressure control valve, and the normal operating temperature of the temperature transmitter is consistent with the inlet temperature of the reciprocating compressor.

5. The reciprocating compressor system backflow gas temperature regulation system of claim 4, wherein, The temperature transmitter sets an alarm threshold, and the compressor system alarms when the outlet temperature of the return pressure control valve is higher or lower than the threshold.

6. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, The temperature transmitter is installed near the inlet washing tank, and the temperature transmitter sets an off threshold, and the compressor system is turned off when the outlet temperature of the return pressure control valve is higher than the threshold.

7. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, A main return gas pipeline check valve should be installed at the inlet of the main return gas pipeline to prevent the reverse flow of the heat return natural gas.

8. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, A heat return pipeline check valve should be installed at the outlet of the temperature return control valve to prevent the reverse flow of the return natural gas.

9. The reciprocating compressor system backflow gas temperature regulation system of claim 1, wherein, A mixed gas buffer tank is arranged between the heat return pipeline and the return pressure control valve to ensure that the heat return natural gas and the cold return natural gas can be uniformly mixed before passing through the return pressure control valve.

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