Intelligent compressed air energy storage and compression control device

Abstract

The invention provides an intelligent compressed air energy storage and compression control device, and belongs to the technical field of compressor application. The environment temperature, the first-stage compression air outlet temperature and the second-stage compression air outlet temperature are collected in real time through a temperature sensor, the temperature rising temperature difference and the air inlet temperature difference are calculated, and based on a preset threshold value, if T1 is larger than 30 DEG C, the cooling power is 100%; opening of an electromagnetic valve and the rotating speed of a rotating motor are dynamically adjusted, temperature closed-loop control is achieved, it is ensured that the system stably operates in the wide temperature range of-10 DEG C to 45 DEG C, the temperature monitoring sampling frequency reaches 10 Hz, and temperature changes can be captured in time; and when T2 exceeds the range of 65-90 DEG C, shutdown and alarm are carried out within 500ms, so that the equipment is prevented from being damaged due to overheating or supercooling, and the safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor applications, and in particular relates to an intelligent compressed air energy storage and compression control device. Background Art

[0002] With the continuous growth of energy demand and the emphasis on the use of renewable energy, energy storage technology has become a research hotspot in the energy field. Compressed air energy storage, as a large-scale energy storage technology, has the advantages of large energy storage capacity, long life, and relatively low cost. It has important application value in power system peak shaving and valley filling, and renewable energy grid integration. Application publication number CN118224066A discloses an air compression device and air compression method, comprising an air storage tank and a control panel. An equipment bracket is fixedly provided on the top surface of the air storage tank, and a compression chamber is installed on the top surface of the equipment bracket. The control panel includes a temperature monitoring unit, a cooling model establishment unit, a cooling efficiency balancing unit, a cooling control unit, and a turbulence control unit. The present invention adds a cooling function to the basic function of an existing two-stage piston compressor, cooling the compressed air whose temperature rises after the first compression, ensuring that the temperature is within a controllable range before the second compression. This not only increases the safety performance of the equipment but also improves the compression efficiency, so that the output compressed gas meets the high pressure requirement. During the cooling process, the cooling process can be precisely controlled according to the compression efficiency, thereby ensuring cooling efficiency while avoiding energy waste and achieving waste heat recovery effect, thereby achieving environmental protection and energy saving. However, the air compressor in the above scheme is a double-piston air compressor, which has the problem of noise pollution itself. The reciprocating motion of the piston generates mechanical noise, which requires additional sound insulation facilities; it is not safe enough: the piston seal is prone to leakage under high-pressure conditions, and there is a risk of oil-gas mixture explosion; in addition, the above scheme has the problem of complex control system and parameter calibration relying on experience; therefore, there is a need for an air energy storage and compression control device with intelligent control of compressed air energy storage function. Summary of the Invention

[0003] In response to the problems in the prior art, the present invention provides an intelligent compressed air energy storage and compression control device.

[0004] In order to achieve the above objectives, the technical solutions adopted in this application are: An intelligent compressed air energy storage and compression control device comprises a shell and a control system, wherein the bottom surface of the inner wall of the shell is fixedly connected to an air storage tank, and a mounting bracket is mounted on the outer side of the top of the air storage tank, the bottom of the mounting bracket is fixedly connected to the bottom surface of the inner wall of the shell; the top surface of the mounting bracket is fixedly connected to a support plate, and the top surfaces of the support plate are respectively fixedly connected to a first compressed gas chamber and a second compressed gas chamber; the first compressed gas chamber is fixedly mounted on the front end of the support plate, and the second compressed gas chamber is fixedly mounted on the rear end of the support plate; the air inlet end of the first compressed gas chamber is fixedly connected to an air inlet pipe, and the air outlet end of the first compressed gas chamber is fixedly connected to the air inlet end of the second compressed gas chamber through an intermediate pipe; the air outlet end of the second compressed gas chamber is fixedly connected to an air outlet pipe, and the other end of the air outlet pipe is fixedly connected to the air storage tank; a cooling mechanism is fixedly mounted on the outer side of the outlet pipe and the intermediate pipe; The control system includes a temperature monitoring unit, a compression model building unit and a compression control unit; The temperature monitoring unit is configured to collect temperature data in real time through a temperature sensor, wherein the temperature data includes the temperature T1 of the gas outlet of the first compressed gas cavity, the temperature T2 of the gas outlet of the second compressed gas cavity, and the ambient temperature T0; The compression model building unit is configured to calculate the first-stage compression temperature difference ΔT1 and the first-stage and second-stage intake temperature difference ΔT2 based on the temperature data; and output control parameters to the compression control unit based on ΔT1 and ΔT2; The compression control unit is configured to control the first compressed gas chamber, the second compressed gas chamber, and the cooling mechanism to change the air compression efficiency according to the instruction issued by the compression model building unit; The control system is equipped with an industrial-grade PLC controller; The specific process of the temperature compression model establishment unit establishing the temperature compression model is as follows: S1: Obtain the ambient temperature T0, the temperature T1 at the air inlet of the first compressed gas chamber, and the temperature T2 at the air outlet of the second compressed gas chamber, and calculate the first-stage compression temperature difference △T1 and the first-stage and second-stage inlet temperature difference △T2. The specific formulas are as follows: △T1=T1-T0; △T2=T2-T2set, where T2set=80℃; S2: When △T1>30℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 100%; when 30℃≥△T1≥20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 50%; when △T1<20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 30%; When ΔT2 is compared with 0, for every 5°C increase, an instruction is sent to the compression control unit to increase the working efficiency of the first compressed gas chamber and the second compressed gas chamber by 3%; for every 5°C decrease, an instruction is sent to the compression control unit to reduce the working efficiency of the first compressed gas chamber and the second compressed gas chamber by 3%. When T2>90℃ or <65℃, the machine will stop and alarm within 500ms.

[0005] Preferably, the cooling mechanism includes a cooling box, which is fixedly connected to the middle of the top surface of the support plate. The cooling box is respectively penetrated and fixedly connected with an intermediate pipe and an air outlet pipe; the back of the cooling box is fixedly connected to a water inlet pipe with a solenoid valve, and the front of the cooling box is fixedly connected to a drain pipe.

[0006] Preferably, two sets of air compression screws meshing with each other are rotatably installed in the first compressed gas chamber and the second compressed gas chamber respectively, and the ends of the air compression screws are fixedly sleeved with a driving gear and a driven gear respectively, and the driving gear and the driven gear are meshed with each other; one end of the air compression screw sleeved with the driving gear is fixedly connected to a rotating motor, and two rotating motors are provided, and the rotating motors are fixedly installed on the top surface of the support plate.

[0007] Preferably, the compression control unit is electrically connected to the rotating motor and the solenoid valve of the water inlet pipe respectively.

[0008] Preferably, a first temperature sensor is provided on the outer surface of the shell, and the first temperature sensor is used to obtain the ambient temperature T0; a second temperature sensor is provided at the air outlet end of the first compressed gas cavity, and the second temperature sensor is used to obtain the temperature T1 of the air after the first air compression; and a third temperature sensor is provided at the air outlet end of the second compressed gas cavity, and the third temperature sensor is used to obtain the temperature T2 of the air after the second air compression.

[0009] Preferably, the sampling frequency of the temperature monitoring unit is 10 Hz.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are: The intelligent compressed air energy storage and compression control device of the present invention uses temperature sensors to collect real-time ambient temperature, first-stage compression outlet temperature, and second-stage compression outlet temperature, calculates the temperature difference between the rising temperature and the intake air temperature difference, and dynamically adjusts the solenoid valve opening and the rotation motor speed based on preset thresholds, such as 100% cooling power when ΔT1>30°C. This device implements closed-loop temperature control, ensuring stable operation of the system over a wide temperature range of -10°C to 45°C. The temperature monitoring sampling frequency reaches 10Hz, allowing for timely capture of temperature changes. When T2 exceeds the range of 65°C to 90°C, the system shuts down and issues an alarm within 500ms, preventing damage from overheating or overcooling, thereby improving safety. In addition, the intelligent compressed air energy storage and compression control device, which includes an air storage tank, a mounting bracket, a support plate, a first compressed gas chamber, a second compressed gas chamber, an air inlet pipe, an intermediate pipe, an air outlet pipe, a cooling box, a water inlet pipe, a drain pipe, an air compression screw, a driving gear, a driven gear and a rotating motor, adopts an integrated layout with a compact structure, saves installation space, and facilitates modular deployment and maintenance in industrial scenarios; it also has the advantage of isolating noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 It is a cross-sectional view of the structural diagram of the present invention; Figure 2 It is a top view of the internal structure schematic diagram of the present invention; In the above figures, 1. shell; 2. gas storage tank; 3. mounting bracket; 4. support plate; 5. first compressed gas chamber; 6. second compressed gas chamber; 7. air inlet pipe; 8. intermediate pipe; 9. air outlet pipe; 10. cooling box; 11. water inlet pipe; 12. drain pipe; 13. air compression screw; 14. driving gear; 15. driven gear; 16. rotating motor. DETAILED DESCRIPTION

[0013] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0015] Example 1, as Figure 1 、 Figure 2As shown, an intelligent compressed air energy storage and compression control device of the present application includes a shell 1 and a control system. The bottom surface of the inner wall of the shell 1 is fixedly connected to the gas storage tank 2, and the outer side of the top of the gas storage tank 2 is provided with a mounting bracket 3. The bottom of the mounting bracket 3 is fixedly connected to the bottom surface of the inner wall of the shell 1; the top surface of the mounting bracket 3 is fixedly connected to the support plate 4, and the top surface of the support plate 4 is respectively fixedly connected to the first compressed gas cavity 5 and the second compressed gas cavity 6; the first compressed gas cavity 5 is fixedly installed at the front end of the support plate 4, and the second compressed gas cavity 6 is fixedly installed at the rear end of the support plate 4 The air inlet end of the first compressed gas cavity 5 is fixedly connected to an air inlet pipe 7, and the air outlet end of the first compressed gas cavity 5 is fixedly connected to the air inlet end of the second compressed gas cavity 6 through an intermediate pipe 8; the air outlet end of the second compressed gas cavity 6 is fixedly connected to an air outlet pipe 9, and the other end of the air outlet pipe 9 is fixedly connected to the gas storage tank 2; a cooling mechanism is fixedly installed on the outer side of the air outlet pipe 9 and the intermediate pipe 8; during use, the cooling mechanism cools down the air in the intermediate pipe 8 that has undergone the first air compression and the air in the air outlet pipe 9 that has undergone the second air compression, respectively; The control system includes a temperature monitoring unit, a compression model building unit and a compression control unit; The temperature monitoring unit is configured to collect temperature data in real time through a temperature sensor, wherein the temperature data includes the temperature T1 of the gas outlet of the first compressed gas cavity 5, the temperature T2 of the gas outlet of the second compressed gas cavity 6, and the ambient temperature T0; The compression model building unit is configured to calculate the first-stage compression temperature difference ΔT1 and the first-stage and second-stage intake temperature difference ΔT2 based on the temperature data; and output control parameters to the compression control unit based on ΔT1 and ΔT2; The compression control unit is configured to control the first compressed gas chamber 5, the second compressed gas chamber 6 and the cooling mechanism to change the air compression efficiency according to the instructions issued by the compression model building unit; The control system has an industrial-grade PLC controller built in; in this application, a Siemens S7-1200 is used; an integrated temperature monitoring unit, a compression model building unit, and a compression control unit; The specific process of the temperature compression model establishment unit establishing the temperature compression model is as follows: S1: Obtain the ambient temperature T0, the temperature T1 at the air inlet of the first compressed gas chamber 5, and the temperature T2 at the air outlet of the second compressed gas chamber 6, and calculate the first-stage compression temperature difference ΔT1 and the first-stage and second-stage air inlet temperature difference ΔT2. The specific formulas are as follows: ΔT1 = T1 - T0; ΔT2 = T2 - T2set, where T2set = 80°C. S2: When △T1>30℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 100%; when 30℃≥△T1≥20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 50%; when △T1<20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 30%; When ΔT2 is compared with 0, for every 5°C increase, an instruction is sent to the compression control unit to increase the working efficiency of the first compressed gas chamber 5 and the second compressed gas chamber 6 by 3%; for every 5°C decrease, an instruction is sent to the compression control unit to reduce the working efficiency of the first compressed gas chamber 5 and the second compressed gas chamber 6 by 3%. When T2>90℃ or <65℃, the machine will stop and alarm within 500ms.

[0016] The cooling mechanism includes a cooling box 10, which is fixedly connected to the middle of the top surface of the support plate 4. The cooling box 10 is respectively penetrated and fixedly connected with the intermediate pipe 8 and the air outlet pipe 9; the back of the cooling box 10 is fixedly connected with a water inlet pipe 11 with a solenoid valve, and the front of the cooling box 10 is fixedly connected with a drain pipe 12; the water inlet pipe 11 continuously injects cooling water into the cooling box 10, and the cooling water takes away the heat in the compressed hot air, and takes away the heat in the air of the first air compression entering the second compressed gas cavity 6 and the air of the second air compression entering the gas storage tank 2. The waste hot water after cooling is discharged through the drain pipe 12, and is supplied to meet the low-heat needs of users, thereby realizing waste heat recovery.

[0017] Two sets of air compression screws 13 meshing with each other are rotatably installed in the first compressed gas chamber 5 and the second compressed gas chamber 6 respectively. The ends of the air compression screws 13 are fixedly sleeved with a driving gear 14 and a driven gear 15, and the driving gear 14 and the driven gear 15 are meshed with each other; one end of the air compression screw 13 sleeved with the driving gear 14 is fixedly connected to the output end of the rotating motor 16, and two rotating motors 16 are provided, and the rotating motors 16 are fixedly installed on the top surface of the support plate 4.

[0018] The compression control unit is electrically connected to the rotating motor 16 and the solenoid valve of the water inlet pipe 11 respectively; during use, when ΔT1>30°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 100%; when 30°C≥ΔT1≥20°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 50%; when ΔT1<20°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 30%; Comparing △T2 with 0, for every 5℃ increase, a command is sent to the compression control unit to increase the rotation speed of the rotating motor by 3%; for every 5℃ decrease, a command is sent to the compression control unit to reduce the rotation speed of the rotating motor by 3%; For example, in a low-temperature winter operating condition: the initial parameters are T0=5℃, T1=75℃; △T1=70℃>30℃, the solenoid valve is fully open; T2 is measured at 68℃, △T2=-12℃, Kr=-7%; the speed of the rotating motor 16 is reduced from 2000rpm to 1860rpm; based on the dynamic adjustment of the temperature and the rotating motor 16, the control system can maintain stable and efficient operation at -10℃~45℃ while ensuring equipment safety.

[0019] The compression control unit is electrically connected to the rotating motor 16 and the solenoid valve of the water inlet pipe 11 respectively; during use, when ΔT1>30°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 100%; when 30°C≥ΔT1≥20°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 50%; when ΔT1<20°C, an instruction is sent to the compression control unit to adjust the opening of the solenoid valve to 30%; Comparing △T2 with 0, for every 5℃ increase, a command is sent to the compression control unit to increase the rotation speed of the rotating motor by 3%; for every 5℃ decrease, a command is sent to the compression control unit to reduce the rotation speed of the rotating motor by 3%; For example, in a low-temperature winter operating condition: the initial parameters are T0=5℃, T1=75℃; △T1=70℃>30℃, the solenoid valve is fully open; T2 is measured at 68℃, △T2=-12℃, Kr=-7%; the speed of the rotating motor 16 is reduced from 2000rpm to 1860rpm; based on the dynamic adjustment of the temperature and the rotating motor 16, the control system can maintain stable and efficient operation at -10℃~45℃ while ensuring equipment safety.

[0020] The sampling frequency of the temperature monitoring unit is 10 Hz.

[0021] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the present invention may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An intelligent compressed air energy storage and compression control device, characterized in that: The invention comprises a shell (1) and a control system, wherein the bottom surface of the inner wall of the shell (1) is fixedly connected to a gas storage tank (2), and the outer side surface of the top of the gas storage tank (2) is provided with a mounting bracket (3), and the bottom of the mounting bracket (3) is fixedly connected to the bottom surface of the inner wall of the shell (1); the top surface of the mounting bracket (3) is fixedly connected to a support plate (4), and the top surface of the support plate (4) is respectively fixedly connected to a first compressed gas cavity (5) and a second compressed gas cavity (6); the first compressed gas cavity (5) is fixedly mounted on the front end of the support plate (4), and the second compressed gas cavity (6) is fixedly mounted on the front end of the support plate (4). The compressed gas cavity (6) is fixedly mounted on the rear end of the support plate (4); the inlet end of the first compressed gas cavity (5) is fixedly connected to an inlet pipe (7), and the outlet end of the first compressed gas cavity (5) is fixedly connected to the inlet end of the second compressed gas cavity (6) through an intermediate pipe (8); the outlet end of the second compressed gas cavity (6) is fixedly connected to an outlet pipe (9), and the other end of the outlet pipe (9) is fixedly connected to the gas storage tank (2); a cooling mechanism is fixedly mounted on the outer side of the outlet pipe (9) and the intermediate pipe (8); The control system includes a temperature monitoring unit, a compression model building unit and a compression control unit; The temperature monitoring unit is configured to collect temperature data in real time through a temperature sensor, wherein the temperature data includes the temperature T1 of the gas outlet end of the first compressed gas cavity (5), the temperature T2 of the gas outlet end of the second compressed gas cavity (6), and the ambient temperature T0; The compression model building unit is configured to calculate the first-stage compression temperature difference ΔT1 and the first-stage and second-stage intake temperature difference ΔT2 based on the temperature data; and output control parameters to the compression control unit based on ΔT1 and ΔT2; The compression control unit is configured to control the first compressed gas chamber (5), the second compressed gas chamber (6) and the cooling mechanism to change the air compression efficiency according to the instructions issued by the compression model establishment unit; The control system is equipped with an industrial-grade PLC controller; The specific process of the temperature compression model establishment unit establishing the temperature compression model is as follows: S1: Obtain the ambient temperature T0, the temperature T1 at the air inlet of the first compressed gas chamber (5), and the temperature T2 at the air outlet of the second compressed gas chamber (6), and calculate the first-stage compression temperature difference △T1 and the first-stage and second-stage air inlet temperature difference △T2; the specific formula is as follows: △T1=T1-T0; △T2=T2-T2set, where T2set=80℃; S2: When △T1>30℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 100%; when 30℃≥△T1≥20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 50%; when △T1<20℃, a command is sent to the compression control unit to adjust the cooling power of the cooling mechanism to 30%; When ΔT2 is compared with 0, for every 5°C increase, a command is sent to the compression control unit to increase the working efficiency of the first compressed gas chamber (5) and the second compressed gas chamber (6) by 3%; for every 5°C decrease, a command is sent to the compression control unit to reduce the working efficiency of the first compressed gas chamber (5) and the second compressed gas chamber (6) by 3%. When T2>90℃ or <65℃, the machine will stop and alarm within 500ms.

2. The intelligent compressed air energy storage and compression control device according to claim 1, characterized in that: The cooling mechanism comprises a cooling box (10), which is fixedly connected to the middle of the top surface of the support plate (4), and the cooling box (10) is respectively penetrated and fixedly connected with an intermediate pipe (8) and an air outlet pipe (9); the back of the cooling box (10) is fixedly connected to a water inlet pipe (11) with a solenoid valve, and the front of the cooling box (10) is fixedly connected to a drain pipe (12).

3. The intelligent compressed air energy storage and compression control device according to claim 2, characterized in that: Two sets of mutually meshing air compression screws (13) are rotatably installed in the first compressed gas chamber (5) and the second compressed gas chamber (6), respectively. The ends of the air compression screws (13) are respectively fixedly sleeved with a driving gear (14) and a driven gear (15), and the driving gear (14) and the driven gear (15) are meshed with each other; one end of the air compression screw (13) sleeved with the driving gear (14) is fixedly connected to a rotating motor (16), two rotating motors (16) are provided, and the rotating motors (16) are fixedly installed on the top surface of the support plate (4).

4. The intelligent compressed air energy storage and compression control device according to claim 3, characterized in that: The compression control unit is electrically connected to the rotary motor (16) and the electromagnetic valve of the water inlet pipe (11), respectively.

5. The intelligent compressed air energy storage and compression control device according to claim 1, characterized in that: The outer surface of the shell (1) is provided with a first temperature sensor, and the first temperature sensor is used to obtain the ambient temperature T0; the air outlet end of the first compressed gas cavity (5) is provided with a second temperature sensor, and the second temperature sensor is used to obtain the temperature T1 of the air after the first air compression; the air outlet end of the second compressed gas cavity (6) is provided with a third temperature sensor, and the third temperature sensor is used to obtain the temperature T2 of the air after the second air compression.

6. The intelligent compressed air energy storage and compression control device according to claim 1, characterized in that: The sampling frequency of the temperature monitoring unit is 10 Hz.

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