A water vapor single-screw compressor test system and water vapor recycling test method

Abstract

A water vapor single screw compressor test system and a water vapor recycling test method are characterized in that the system is composed of a steam drum (5) and a liquid-gas separator (3), an electric heater (12) and an inverted T-shaped steam distribution mixer (13) are installed in the steam drum (5), the steam drum (5) is connected to the water vapor single screw compressor (1) through a steam return line (6), the steam single screw compressor (1) is connected to the air inlet of the liquid-gas separator (3) through a high-pressure steam outlet line (2), the high-pressure steam separated by the liquid-gas separator (3) is connected to the air inlet of the inverted T-shaped steam distribution mixer (13) installed in the steam drum through a low-pressure steam line (4), the bottom of the inverted T-shaped steam distribution mixer (13) is below the waterline of the steam drum (5) and is covered with small holes, so that the high-temperature steam is evenly mixed with the water in the steam drum to transfer heat and recover heat energy. The present invention has a simple structure, does not require electric heating when the compressor is started, and saves energy and water resources.

Description

Technical Field

[0001] The present invention relates to a compressor performance testing technology, in particular to a single-screw compressor water vapor testing technology, specifically to a water vapor single-screw compressor testing system and a water vapor recycling testing method. Background Art

[0002] At present, there are a lot of waste steam in chemical, metallurgical, food, textile, energy and other industries. Single-screw compressors can be used to compress waste steam. Its characteristic is that the discharged steam is saturated steam. The water vapor single-screw compressor type test and factory test both require water vapor testing. Since the water vapor single compressor has a relatively large intake volume, it needs to be equipped with a large boiler. The steam discharged from the compressor cannot be used, resulting in a lot of waste, which is contrary to the current concept of energy conservation and environmental protection. Summary of the Invention

[0003] The purpose of the present invention is to address the problem of serious water vapor waste during the finalization and factory testing of existing water vapor single-screw compressors, design a water vapor single-screw compressor testing system that can realize water vapor recycling and reduce steam waste, and at the same time provide a corresponding water vapor recycling testing method.

[0004] One of the technical solutions of the present invention is:

[0005] A steam single-screw compressor test system, characterized in that: it mainly consists of a steam drum 5 and a liquid-gas separator 3, an electric heater 12 and an inverted T-shaped steam distribution mixer 13 are installed in the steam drum 5, the steam drum 5 is connected to the low-pressure air inlet of the steam single-screw compressor 1 to be tested through a steam return line 6, the high-pressure air outlet of the steam single-screw compressor 1 is connected to the air inlet of the liquid-gas separator 3 through a high-pressure steam outlet line 2, the high-pressure steam separated by the liquid-gas separator 3 is output from its upper part and is reduced in pressure by a regulating valve before being connected to the inverted T-shaped steam distribution mixer 1 installed in the steam drum through a low-pressure steam pipeline 4. 3 air inlet is connected, the bottom of the inverted T-shaped steam distributor mixer 13 is below the waterline of the steam drum 5 and is covered with small holes, which evenly mix the high-temperature steam with the water in the steam drum to transfer heat and recover heat energy; the lower part of the liquid-gas separator 3 is provided with a water recovery pipeline 9 connecting the liquid-gas separator and the steam drum, which is used to recover excess water in the liquid-gas separator 3 to the steam drum 5 through the pressure difference, thereby reducing the waste of deionized water and heat energy; the liquid-gas separator 3 also sprays water into the steam single-screw compressor 1 through the liquid injection pipeline 7 inserted into the water inside the liquid-gas separator 3; the upper part of the steam drum 5 is connected to the steam drum 5, and the lower part of the steam drum 5 is connected to the steam drum blowdown pipeline 10.

[0006] The steam return pipeline 6 and the high-pressure steam outlet pipeline 2 are both equipped with a shutoff valve, a regulating valve, a steam meter, a temperature sensor and a pressure sensor; the low-pressure steam pipeline 4 is equipped with a shutoff valve and a regulating valve.

[0007] The steam drum 5 and the liquid-gas separator 3 are both connected to a deionized water supply pipeline 8 , and a water supply pump, a one-way valve and a stop valve are installed on the deionized water supply pipeline 8 .

[0008] The steam drum 5 is equipped with a pressure sensor and a temperature sensor.

[0009] The liquid spraying pipeline 7 is equipped with a pressure sensor, a temperature sensor, a regulating valve, a liquid spraying flow meter and a stop valve.

[0010] The steam drum 5 and the liquid-gas separator 3 are both connected to a liquid level sensor and a safety valve.

[0011] The second technical solution of the present invention is:

[0012] A water vapor recycling test method for a water vapor single-screw compressor test system, characterized by:

[0013] First, start the electric heater on drum 5 to increase the steam pressure in the drum to above 0.3 MPa;

[0014] Secondly, open the stop valve and regulating valve on the steam return pipeline 6, start the steam screw compressor 1, and the high-pressure steam output by the steam screw compressor 1 enters the liquid-gas separator 3 through the high-pressure steam outlet pipeline 2;

[0015] Third, the water in the liquid-gas separator 3 is sprayed into the steam single-screw compressor 1 through the liquid spraying pipeline 7 inserted below the water level line;

[0016] Fourth, the high-pressure steam in the liquid-gas separator 3 is discharged from the top, decompressed by the regulating valve, and then discharged into the steam drum 5 through the low-pressure steam pipeline 4. An inverted T-shaped steam distribution mixing pipe is arranged inside the steam drum. The bottom of the inverted T-shaped steam distribution mixing pipe is below the waterline of the steam drum 5 and is covered with small holes. The high-temperature steam is evenly mixed with the water in the steam drum to transfer heat and recover heat energy. The vaporized water vapor is collected at the top of the steam drum 5 again, passes through the steam return pipeline to adjust the flow and pressure, and then enters the water vapor single-screw compressor 1 for compression again, realizing steam recycling.

[0017] Fifth, the pressure gradient in the system is: exhaust port of steam single screw compressor 1 > liquid-gas separator 3 > steam drum 5 > suction port of steam single screw compressor 1;

[0018] Sixth, a manual or automatic shut-off valve is installed on the steam return line 6 connecting the steam drum 5 outlet and the single-screw steam compressor 1 inlet for opening and closing the line; a regulating valve is used for pressure regulation; a flow meter is used to measure the suction flow of the steam single-screw compressor 1; and temperature and pressure sensors are installed for steam status monitoring;

[0019] Seventh, use the high-pressure steam outlet pipeline 2 to connect the exhaust port of the steam single-screw compressor 1 and the air inlet of the liquid-gas separator 3. A manual or automatic stop valve is installed on the pipeline, and a one-way valve is used to open and close the steam pipeline; temperature and pressure sensors are installed to monitor the steam status;

[0020] Eighth, a low-pressure steam outlet pipeline 4 is used to connect the outlet of the liquid-gas separator 3 and the air inlet of the steam drum 5. A manual or automatic stop valve is set on the pipeline to open and close the steam pipeline; a regulating valve is set to adjust the steam pressure;

[0021] Ninth, a liquid injection pipeline 7 is used to connect the liquid outlet of the liquid-gas separator 3 and the liquid injection port of the steam single-screw compressor 1. A manual or automatic stop valve is set on the pipeline to open and close the pipeline; a regulating valve is set to adjust the liquid injection flow rate; and temperature and pressure sensors are set to monitor the liquid injection status;

[0022] Tenth, a water recovery line 9 is used to connect the drain port of the liquid-gas separator 3 and the liquid return port of the steam drum 5 to recover the excess water in the liquid-gas separator 3 into the steam drum 5 through the pressure difference, thereby reducing the waste of deionized water and heat energy;

[0023] Eleventh, a safety valve is provided on the liquid-gas separator 3 for overpressure relief protection; a liquid level sensor is provided to discharge water when the liquid level is high and to replenish liquid through the liquid-gas separator replenishment pipeline 8 when the liquid level is low; the inlet of the liquid-gas separator replenishment pipeline 8 is connected to deionized water, which is pressurized by a multi-stage centrifugal pump and then flows into the liquid-gas separator 3 through a one-way valve and a manual or automatic stop valve;

[0024] Twelfth, in addition to the electric heater and steam distribution and mixing pipe, the steam drum 5 is also equipped with temperature, pressure and liquid level sensors for working status detection and protection. In case of overpressure, the pressure is released through the vent of the steam drum vent pipeline 11 equipped with an automatic valve. When the liquid level is high, the water is drained through the steam drum sewage pipeline 10 equipped with an automatic valve. When the liquid level is low, the water is pressurized by a multi-stage centrifugal pump and then flows into the steam drum 5 through a one-way valve and a manual or automatic stop valve. The steam drum is also equipped with a safety valve for overpressure protection during steam drum operation.

[0025] Thirteenth, once the test system cycle is established, the electric heater 12 in the steam drum 5 does not need to be started. The system heat source is provided by the steam single-screw compressor 1 when it is working. The steam is circulated and the hot water is recovered in stages to minimize the energy consumption of the test system.

[0026] Beneficial effects of the present invention:

[0027] The present invention realizes the recycling of water vapor and can greatly reduce the consumption of energy and deionized water. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the principle of the test recovery system of the present invention. In the figure, 14 is a pressure sensor, 15 is a temperature sensor, 16 is a steam flow meter, 17 is a regulating valve, 18 is a stop valve, 19 is a safety valve, 20 is a one-way valve, 21 is a liquid spray flow meter, 22 is a water supply pump, and 23 is a liquid level sensor. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and examples.

[0030] like Figure 1 shown.

[0031] A steam single-screw compressor test system, which mainly consists of a steam drum 5 and a liquid-gas separator 3. An electric heater 12 and an inverted T-shaped steam distribution mixer 13 are installed in the steam drum 5. The steam drum 5 is connected to the low-pressure air inlet of the steam single-screw compressor 1 to be tested through a steam return line 6. The high-pressure air outlet of the steam single-screw compressor 1 is connected to the air inlet of the liquid-gas separator 3 through a high-pressure steam outlet line 2. The high-pressure steam separated by the liquid-gas separator 3 is output from its upper part and, after being reduced in pressure by a regulating valve, is then connected to the inverted T-shaped steam distribution mixer 13 installed in the steam drum through a low-pressure steam line 4. The bottom of the inverted T-shaped steam distributor mixer 13 is below the waterline of the steam drum 5 and is covered with small holes. This uniformly mixes the high-temperature steam with the water in the steam drum to transfer heat and recover heat energy. A water recovery line 9 is provided below the liquid-gas separator 3, connecting the liquid-gas separator and the steam drum. This line is used to recover excess water in the liquid-gas separator 3 back into the steam drum 5 through a pressure differential, reducing the waste of deionized water and heat energy. The liquid-gas separator 3 also sprays water into the steam single-screw compressor 1 via a liquid injection line 7 inserted into the water inside the liquid-gas separator 3. A steam drum vent line 11 is connected to the top of the steam drum 5, and a steam drum drain line 10 is connected to the bottom of the steam drum 5. The steam return line 6 and the high-pressure steam outlet line 2 are both equipped with a shutoff valve, a regulating valve, a steam meter, a temperature sensor, and a pressure sensor. The low-pressure steam line 4 is also equipped with a shutoff valve and a regulating valve. The steam drum 5 and the gas-liquid separator 3 are both connected to a deionized water supply line 8, on which a water supply pump, a one-way valve and a shut-off valve are installed. The steam drum 5 is installed with a pressure sensor and a temperature sensor. The liquid injection line 7 is installed with a pressure sensor, a temperature sensor, a regulating valve, a liquid injection flow meter and a shut-off valve. The steam drum 5 and the gas-liquid separator 3 are both connected to a liquid level sensor and a safety valve. Figure 1 The usage is as follows:

[0032] 1. Start the electric heater on drum 5 to increase the steam pressure in the drum to above 0.3 MPa;

[0033] 2. Then open the stop valve and regulating valve on the steam return pipeline 6, start the steam screw compressor 1, and the high-pressure steam enters the liquid-gas separator 3 through the high-pressure steam outlet pipeline 2;

[0034] 3. The water in the liquid-gas separator 3 is sprayed into the steam single-screw compressor 1 through the liquid spray line 7 inserted below the water level line.

[0035] 4. The high-pressure steam in the liquid-gas separator 3 is discharged from the top, decompressed by the regulating valve, and then discharged into the steam drum 5 through the low-pressure steam pipeline 4. A steam distribution mixing pipe is set inside the steam drum. The mixing pipe is arranged in an inverted T shape, with the bottom below the waterline of the steam drum 5 and covered with small holes. The high-temperature steam is evenly mixed with the water in the steam drum for heat transfer and heat energy recovery.

[0036] 5. The vaporized water vapor gathers at the top of the steam drum 5 and enters the steam single-screw compressor 1 again for compression after the flow and pressure are adjusted through the steam reflux pipeline, thus realizing steam recycling.

[0037] 6. The pressure gradient in the system is: exhaust port of steam single screw compressor 1 > liquid-gas separator 3 > steam drum 5 > suction port of steam single screw compressor 1;

[0038] 7. The steam return pipeline 6 connects the air outlet of the steam drum 5 and the air inlet of the single-screw steam compressor 1. A manual or automatic stop valve is set on the pipeline for opening and closing the pipeline; a regulating valve is used for pressure regulation; a flow meter is used to measure the suction flow of the steam single-screw compressor 1; and temperature and pressure sensors are set for steam status monitoring.

[0039] 8. The high-pressure steam outlet pipeline 2 connects the exhaust port of the steam single-screw compressor 1 and the air inlet of the liquid-gas separator 3. A manual or automatic stop valve is installed on the pipeline, and a one-way valve is used to open and close the steam pipeline; temperature and pressure sensors are installed for steam status monitoring.

[0040] 9. The low-pressure steam outlet pipeline 4 connects the outlet of the liquid-gas separator 3 and the air inlet of the steam drum 5. A manual or automatic stop valve is set on the pipeline to open and close the steam pipeline; a regulating valve is set to adjust the steam pressure.

[0041] 10. The liquid spray pipeline 7 connects the liquid outlet of the liquid-gas separator 3 and the liquid spray outlet of the steam single-screw compressor. A manual or automatic stop valve is set on the pipeline for opening and closing the pipeline; a regulating valve is set for regulating the liquid spray flow rate; and temperature and pressure sensors are set for monitoring the liquid spray status.

[0042] 11. The water recovery pipeline 9 connects the sewage outlet of the liquid-gas separator 3 and the liquid return port of the steam drum 5, and is used to recover the excess water in the liquid-gas separator 3 into the steam drum 5 through the pressure difference, thereby reducing the waste of deionized water and heat energy.

[0043] 12. A safety valve is provided on the liquid-gas separator 3 for overpressure relief protection; a liquid level sensor is provided to discharge water when the liquid level is high and to replenish liquid through the liquid-gas separator replenishment pipeline 8 when the liquid level is low; the inlet of the liquid-gas separator replenishment pipeline 8 is connected to deionized water, which is pressurized by a multi-stage centrifugal pump and then flows into the liquid-gas separator 3 through a one-way valve and a manual or automatic stop valve.

[0044] 13. In addition to the electric heater and steam distribution mixing pipe, the steam drum 5 is also equipped with temperature, pressure and liquid level sensors for working status detection and protection. In case of overpressure, the pressure is released through the vent 11 with an automatic valve. When the liquid level is high, the water is discharged through the steam drum drain pipeline 10 with an automatic valve. When the liquid level is low, the liquid is pressurized by a multi-stage centrifugal pump and then flows into the steam drum 5 through a one-way valve and a manual or automatic stop valve. The steam drum is also equipped with a safety valve for overpressure protection during steam drum operation.

[0045] 14. Once the system circulation is established, the electric heater in the drum 5 does not need to be started. The system heat source is provided by the steam single-screw compressor 1 when it is working. The steam is circulated and the hot water is recovered in stages to minimize the energy consumption of the test system.

[0046] The parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology.

Claims

1. A steam single-screw compressor testing system, characterized by: The invention comprises a steam drum (5) and a liquid-gas separator (3), wherein an electric heater (12) and an inverted T-shaped steam distribution mixer (13) are installed in the steam drum (5), wherein the steam drum (5) is connected to the low-pressure air inlet of the tested steam single-screw compressor (1) through a steam return line (6), and the high-pressure air outlet of the steam single-screw compressor (1) is connected to the air inlet of the liquid-gas separator (3) through a high-pressure steam outlet line (2). The high-pressure steam separated by the liquid-gas separator (3) is output from the upper part thereof and is decompressed by a regulating valve and then connected to the air inlet of the inverted T-shaped steam distribution mixer (13) installed in the steam drum through a low-pressure steam line (4). The bottom of the inverted T-shaped steam distribution mixer (13) is below the waterline of the steam drum (5) and is covered with small holes, so that the high-temperature steam is evenly mixed with the water in the steam drum for heat transfer and heat energy is recovered; the lower part of the liquid-gas separator (3) is provided with a A water recovery pipeline (9) is provided connecting the liquid-gas separator and the steam drum, and is used to recover excess water in the liquid-gas separator (3) into the steam drum (5) through a pressure difference, thereby reducing the waste of deionized water and heat energy; the liquid-gas separator (3) simultaneously sprays water into the steam single-screw compressor (1) through a liquid spray pipeline (7) inserted into the water inside the liquid-gas separator (3); the upper part of the steam drum (5) is connected to a steam drum venting pipeline (11), and the lower part of the steam drum (5) is connected to a steam drum sewage pipeline (10); the steam return pipeline (6) and the high-pressure steam outlet pipeline (2) are both equipped with a stop valve, a regulating valve, a steam flow meter, a temperature sensor and a pressure sensor; the low-pressure steam pipeline (4) is equipped with a stop valve and a regulating valve; the steam drum (5) and the liquid-gas separator (3) are both connected to a deionized water supply pipeline (8), and the deionized water supply pipeline (8) is equipped with a water supply pump, a one-way valve and a stop valve.

2. The steam single-screw compressor testing system according to claim 1, characterized in that: The steam drum (5) is equipped with a pressure sensor and a temperature sensor.

3. The steam single-screw compressor testing system according to claim 1, characterized in that: The liquid spraying pipeline (7) is equipped with a pressure sensor, a temperature sensor, a regulating valve, a liquid spraying flow meter and a stop valve.

4. The steam single-screw compressor testing system according to claim 1, characterized in that: The steam drum (5) and the liquid-gas separator (3) are both connected to a liquid level sensor and a safety valve.

5. A water vapor recycling testing method for a water vapor single-screw compressor testing system according to claim 1, characterized in that: First, start the electric heater on the drum (5) to increase the steam pressure in the drum to above 0.3 MPa; Next, the stop valve and the regulating valve on the steam return pipeline (6) are opened to start the steam single-screw compressor (1). The high-pressure steam outputted by the steam single-screw compressor (1) enters the liquid-gas separator (3) through the high-pressure steam outlet pipeline (2); Third, the water in the liquid-gas separator (3) is sprayed into the steam single-screw compressor (1) through the liquid spraying pipeline (7) inserted below the water level line; Fourth, the high-pressure steam in the liquid-gas separator (3) is discharged from the top, and after being reduced in pressure by the regulating valve, it is discharged into the steam drum (5) through the low-pressure steam pipeline (4). An inverted T-shaped steam distribution mixing pipe is arranged inside the steam drum. The bottom of the inverted T-shaped steam distribution mixing pipe is below the water line of the steam drum (5) and is covered with small holes. The high-temperature steam is evenly mixed with the water in the steam drum to transfer heat and recover heat energy. The vaporized water vapor is collected at the top of the steam drum (5) again, and after the flow rate and pressure are adjusted by the steam return pipeline, it enters the water vapor single-screw compressor (1) again for compression, thereby realizing steam recycling. The pressure gradient in the system is: the exhaust port of the steam single screw compressor (1) > the liquid-gas separator (3) > the steam drum (5) > the suction port of the steam single screw compressor (1); Once the test system cycle is established, the electric heater (12) in the drum (5) does not need to be started. The system heat source is provided by the steam single-screw compressor (1) when it is working. The steam is circulated and the hot water is recycled in stages, which minimizes the energy consumption of the test system.

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