Water outlet automatic control system of heat recovery centrifugal compressor

Abstract

The utility model discloses an automatic water outlet control system of a heat recovery centrifugal compressor. The automatic water outlet control system of the heat recovery centrifugal compressor comprises a first-stage compression unit, a second-stage compression unit, a third-stage compression unit, a first-stage gas cooler, a second-stage gas cooler, a third-stage gas cooler, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor, a sixth temperature sensor, a first regulating valve, a second regulating valve, a third regulating valve and a main control circuit. According to the water outlet automatic control system of the heat recovery centrifugal compressor, on the premise that the gas consumption of a user and the energy consumption of a unit can be guaranteed, the water outlet temperature can be kept within the range required by the user constantly.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors and relates to a centrifugal compressor, in particular to an automatic water outlet control system for a heat recovery centrifugal compressor. Background Art

[0002] The electricity consumed by centrifugal units to increase the potential energy of the medium during compression only accounts for 15% of the total power consumption. Approximately 85% of the electricity is converted into heat, which is discharged into the atmosphere as a byproduct through the cooling system. Recycling waste heat can bring significant economic benefits to enterprises and reduce production costs.

[0003] Traditional heat recovery units are not skid-mounted, require heavy on-site construction work, occupy a large area, and the temperature of recovered hot water cannot be automatically adjusted in real time, failing to meet users' full coverage of hot water at 60°C to 90°C.

[0004] In view of this, there is an urgent need to design a new water outlet control method for a centrifugal compressor so as to overcome at least some of the above-mentioned defects of the existing water outlet control method. Utility Model Content

[0005] The utility model provides an automatic water outlet control system for a heat recovery centrifugal compressor, which can ensure that the outlet water temperature is constant within the user's required range under the premise of ensuring the user's gas consumption and unit energy consumption.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the following technical solutions are adopted:

[0007] A heat recovery centrifugal compressor water outlet automatic control system, the heat recovery centrifugal compressor water outlet automatic control system comprising: a first-stage compression unit, a second-stage compression unit, a third-stage compression unit, a first-stage gas cooler, a second-stage gas cooler, a third-stage gas cooler, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor, a first regulating valve, a second regulating valve, a third regulating valve, and a main control circuit;

[0008] The exhaust end of the first-stage compression unit is connected to the air inlet end of the first-stage gas cooler, and the exhaust end of the first-stage gas cooler is provided with a first temperature sensor; the first-stage gas cooler outputs cooling water through a first cooling water outlet pipeline, and the first cooling water outlet pipeline is provided with a fourth temperature sensor and a first regulating valve; the first temperature sensor is used to sense the temperature of the exhaust end of the first-stage gas cooler, and the fourth temperature sensor is used to sense the outlet temperature of the cooling water of the first-stage gas cooler;

[0009] The exhaust end of the second-stage compression unit is connected to the intake end of the secondary gas cooler, and the exhaust end of the secondary gas cooler is provided with a second temperature sensor; the secondary gas cooler outputs cooling water through a second cooling water outlet pipeline, and the second cooling water outlet pipeline is provided with a fifth temperature sensor and a second regulating valve; the second temperature sensor is used to sense the temperature of the exhaust end of the secondary gas cooler, and the fifth temperature sensor is used to sense the outlet temperature of the cooling water of the secondary gas cooler;

[0010] The exhaust end of the third-stage compression unit is connected to the intake end of the third-stage gas cooler, and the exhaust end of the third-stage gas cooler is provided with a third temperature sensor; the third-stage gas cooler outputs cooling water through a third cooling water outlet pipeline, and the third cooling water outlet pipeline is provided with a sixth temperature sensor and a third regulating valve; the third temperature sensor is used to sense the temperature of the exhaust end of the third-stage gas cooler, and the sixth temperature sensor is used to sense the outlet temperature of the cooling water of the third-stage gas cooler;

[0011] The main control circuit is respectively connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor, the first regulating valve, the second regulating valve, and the third regulating valve;

[0012] The output end of the first temperature sensor, the output end of the second temperature sensor, the output end of the third temperature sensor, the output end of the fourth temperature sensor, the output end of the fifth temperature sensor, and the output end of the sixth temperature sensor are respectively connected to the input end of the main control circuit, and the main control circuit receives temperature data sensed by the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, and the sixth temperature sensor;

[0013] The output end of the main control circuit is connected to the output end of the first regulating valve, the output end of the second regulating valve, and the output end of the third regulating valve respectively. The main control circuit sends control signals to the first regulating valve, the second regulating valve, and the third regulating valve respectively to control their operation, thereby adjusting the opening of the corresponding gas cooler.

[0014] As an embodiment of the present invention, the first cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the primary gas cooler is connected to the cooling water inlet main pipe through the first cooling water inlet pipe;

[0015] The second cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the secondary gas cooler is connected to the cooling water inlet main pipe through the second cooling water inlet pipe;

[0016] The third cooling water outlet pipeline is connected to the cooling water outlet main pipe, and the water inlet of the three-stage gas cooler is connected to the cooling water inlet main pipe through the third cooling water inlet pipeline.

[0017] As an embodiment of the present invention, a seventh temperature sensor is provided in the first cooling water inlet pipe or / and the second cooling water inlet pipe or / and the third cooling water inlet pipe.

[0018] As an implementation manner of the present utility model, the first regulating valve, the second regulating valve and the third regulating valve are solenoid valves.

[0019] As an implementation manner of the present utility model, the first regulating valve, the second regulating valve and the third regulating valve are electric valves.

[0020] The beneficial effect of the utility model is that the heat recovery centrifugal compressor outlet water automatic control system proposed by the utility model can ensure that the outlet water temperature is constant within the user's required range under the premise of ensuring the user's gas consumption and unit energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of an automatic water outlet control system for a heat recovery centrifugal compressor in one embodiment of the present invention.

[0022] Figure 2 This is a structural diagram of an automatic water outlet control system for a heat recovery centrifugal compressor in one embodiment of the present invention.

[0023] Figure 3 This is a schematic structural diagram of a three-stage gas cooler in one embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the composition of an automatic water outlet control system for a heat recovery centrifugal compressor in one embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0026] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0027] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar existing technical means and some technical features of the embodiments are interchangeable and fall within the scope of the description and protection of the present invention.

[0028] The term “connection” in the specification includes both direct connection and indirect connection.

[0029] The utility model discloses an automatic control system for water outlet of a heat recovery centrifugal compressor. Figures 1 to 3 The structure of the automatic control system for water outlet of a heat recovery centrifugal compressor in one embodiment of the utility model is disclosed. Figure 4 The invention discloses the composition of the automatic control system for the water outlet of the heat recovery centrifugal compressor in one embodiment; please refer to Figures 1 to 4 The heat recovery centrifugal compressor outlet water automatic control system includes: a first-stage compression unit 1, a second-stage compression unit 2, a third-stage compression unit 3, a first-stage gas cooler 4, a second-stage gas cooler 5, a third-stage gas cooler 6, a first temperature sensor 7, a second temperature sensor 8, a third temperature sensor 9, a fourth temperature sensor 10, a fifth temperature sensor 11, a sixth temperature sensor 12, a first regulating valve 13, a second regulating valve 14, a third regulating valve 15, and a main control circuit 16. The first regulating valve 13, the second regulating valve 14, and the third regulating valve 15 can be solenoid valves or electric valves.

[0030] The exhaust end of the first-stage compression unit 1 is connected to the air inlet end of the first-stage gas cooler 4, and the exhaust end of the first-stage gas cooler 4 is provided with a first temperature sensor 7; the first-stage gas cooler 4 outputs cooling water through a first cooling water outlet pipeline, and the first cooling water outlet pipeline is provided with a fourth temperature sensor 10 and a first regulating valve 13; the first temperature sensor 7 is used to sense the temperature of the exhaust end of the first-stage gas cooler 4, and the fourth temperature sensor 10 is used to sense the cooling water outlet temperature of the first-stage gas cooler 4.

[0031] The exhaust end of the second-stage compression unit 2 is connected to the air inlet end of the secondary gas cooler 5, and the exhaust end of the secondary gas cooler 5 is provided with a second temperature sensor 8; the secondary gas cooler 5 outputs cooling water through a second cooling water outlet pipeline, and the second cooling water outlet pipeline is provided with a fifth temperature sensor 11 and a second regulating valve 14; the second temperature sensor 8 is used to sense the temperature of the exhaust end of the secondary gas cooler 5, and the fifth temperature sensor 11 is used to sense the cooling water outlet temperature of the secondary gas cooler 5.

[0032] The exhaust end of the third-stage compression unit 3 is connected to the air inlet end of the third-stage gas cooler 6, and the exhaust end of the third-stage gas cooler 6 is provided with a third temperature sensor 9; the third-stage gas cooler 6 outputs cooling water through a third cooling water outlet pipeline, and the third cooling water outlet pipeline is provided with a sixth temperature sensor 12 and a third regulating valve 15; the third temperature sensor 9 is used to sense the temperature of the exhaust end of the third-stage gas cooler, and the sixth temperature sensor 12 is used to sense the cooling water outlet temperature of the third-stage gas cooler 6.

[0033] The main control circuit 16 is respectively connected to the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10, the fifth temperature sensor 11, the sixth temperature sensor 12, the first regulating valve 13, the second regulating valve 14, and the third regulating valve 15; the output end of the first temperature sensor 7, the output end of the second temperature sensor 8, the output end of the third temperature sensor 9, the output end of the fourth temperature sensor 10, the output end of the fifth temperature sensor 11, and the output end of the sixth temperature sensor 12 are respectively connected to the input end of the main control circuit 16, and the main control circuit 16 receives temperature data sensed by the first temperature sensor 7, the second temperature sensor 8, the third temperature sensor 9, the fourth temperature sensor 10, the fifth temperature sensor 11, and the sixth temperature sensor 12.

[0034] The output end of the main control circuit 16 is connected to the output end of the first regulating valve 13, the output end of the second regulating valve 14, and the output end of the third regulating valve 15, respectively. The main control circuit 16 sends control signals to the first regulating valve 13, the second regulating valve 14, and the third regulating valve 15 to control their operation, thereby adjusting the opening of the corresponding gas cooler.

[0035] In one embodiment of the present invention, the first cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the first-stage gas cooler is connected to the cooling water inlet main pipe via the first cooling water inlet pipe; the second cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the second-stage gas cooler is connected to the cooling water inlet main pipe via the second cooling water inlet pipe; the third cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the tertiary gas cooler is connected to the cooling water inlet main pipe via the third cooling water inlet pipe. In one embodiment, a seventh temperature sensor is provided on the first cooling water inlet pipe, / or the second cooling water inlet pipe, or / and the third cooling water inlet pipe.

[0036] In one usage scenario of the present invention, after the process medium undergoes the first-stage compression, the high-temperature gas enters the first-stage gas cooler for cooling, the cooled gas enters the second-stage compression, the compressed high-temperature gas enters the second-stage gas cooler for cooling, the cooled gas enters the third-stage compression, and the compressed high-temperature gas finally enters the third-stage gas cooler.

[0037] The low-temperature circulating water flows into the first-stage gas cooler, the second-stage gas cooler and the third-stage gas cooler respectively. After heat exchange in the coolers, it becomes high-temperature circulating water and then flows to the users.

[0038] The first regulating valve opening is calculated and controlled by the main control circuit based on the temperature monitored by the first temperature sensor and the fourth temperature sensor; the second regulating valve opening is calculated and controlled by the main control circuit based on the temperature monitored by the first temperature sensor, the second temperature sensor, and the fifth temperature sensor; the second regulating valve opening is calculated and controlled by the main control circuit based on the temperature monitored by the second temperature sensor, the third temperature sensor, and the sixth temperature sensor;

[0039] In summary, the heat recovery centrifugal compressor outlet water automatic control system proposed in this utility model can ensure that the outlet water temperature is constant within the user's required range under the premise of ensuring the user's gas consumption and unit energy consumption.

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The description and application of the present invention here are illustrative and are not intended to limit the scope of the present invention to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be reflected in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. Variations and changes to the embodiments disclosed here are possible, and replacements and various equivalent components of the embodiments are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that, without departing from the spirit or essential characteristics of the present invention, the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts. Other variations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. An automatic control system for water outlet of a heat recovery centrifugal compressor, characterized in that: The heat recovery centrifugal compressor water outlet automatic control system includes: a first-stage compression unit, a second-stage compression unit, a third-stage compression unit, a first-stage gas cooler, a second-stage gas cooler, a third-stage gas cooler, a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor, a first regulating valve, a second regulating valve, a third regulating valve, and a main control circuit; The exhaust end of the first-stage compression unit is connected to the air inlet end of the first-stage gas cooler, and the exhaust end of the first-stage gas cooler is provided with a first temperature sensor; the first-stage gas cooler outputs cooling water through a first cooling water outlet pipeline, and the first cooling water outlet pipeline is provided with a fourth temperature sensor and a first regulating valve; the first temperature sensor is used to sense the temperature of the exhaust end of the first-stage gas cooler, and the fourth temperature sensor is used to sense the outlet temperature of the cooling water of the first-stage gas cooler; The exhaust end of the second-stage compression unit is connected to the intake end of the secondary gas cooler, and the exhaust end of the secondary gas cooler is provided with a second temperature sensor; the secondary gas cooler outputs cooling water through a second cooling water outlet pipeline, and the second cooling water outlet pipeline is provided with a fifth temperature sensor and a second regulating valve; the second temperature sensor is used to sense the temperature of the exhaust end of the secondary gas cooler, and the fifth temperature sensor is used to sense the outlet temperature of the cooling water of the secondary gas cooler; The exhaust end of the third-stage compression unit is connected to the intake end of the third-stage gas cooler, and the exhaust end of the third-stage gas cooler is provided with a third temperature sensor; the third-stage gas cooler outputs cooling water through a third cooling water outlet pipeline, and the third cooling water outlet pipeline is provided with a sixth temperature sensor and a third regulating valve; the third temperature sensor is used to sense the temperature of the exhaust end of the third-stage gas cooler, and the sixth temperature sensor is used to sense the outlet temperature of the cooling water of the third-stage gas cooler; The main control circuit is respectively connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor, the first regulating valve, the second regulating valve, and the third regulating valve; The output end of the first temperature sensor, the output end of the second temperature sensor, the output end of the third temperature sensor, the output end of the fourth temperature sensor, the output end of the fifth temperature sensor, and the output end of the sixth temperature sensor are respectively connected to the input end of the main control circuit, and the main control circuit receives temperature data sensed by the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, and the sixth temperature sensor; The output end of the main control circuit is connected to the output end of the first regulating valve, the output end of the second regulating valve, and the output end of the third regulating valve respectively. The main control circuit sends control signals to the first regulating valve, the second regulating valve, and the third regulating valve respectively to control their operation, thereby adjusting the opening of the corresponding gas cooler.

2. The heat recovery centrifugal compressor water outlet automatic control system according to claim 1, characterized in that: The first cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the first-stage gas cooler is connected to the cooling water inlet main pipe through the first cooling water inlet pipe; The second cooling water outlet pipe is connected to the cooling water outlet main pipe, and the water inlet of the secondary gas cooler is connected to the cooling water inlet main pipe through the second cooling water inlet pipe; The third cooling water outlet pipeline is connected to the cooling water outlet main pipe, and the water inlet of the three-stage gas cooler is connected to the cooling water inlet main pipe through the third cooling water inlet pipeline.

3. The heat recovery centrifugal compressor water outlet automatic control system according to claim 2, characterized in that: The first cooling water inlet pipe and / or the second cooling water inlet pipe and / or the third cooling water inlet pipe are provided with a seventh temperature sensor.

4. The heat recovery centrifugal compressor water outlet automatic control system according to claim 1, characterized in that: The first regulating valve, the second regulating valve and the third regulating valve are solenoid valves.

5. The heat recovery centrifugal compressor water outlet automatic control system according to claim 1, characterized in that: The first regulating valve, the second regulating valve and the third regulating valve are electric valves.

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