Magnetic suspension natural gas differential pressure power generation cold energy utilization system

Abstract

The utility model belongs to the technical field of magnetic suspension natural gas differential pressure power generation cold energy utilization, and discloses a magnetic suspension natural gas differential pressure power generation cold energy utilization system which comprises a first magnetic suspension natural gas differential pressure power generation system. The cold energy output end of the first magnetic suspension expansion generator is connected with a first heat exchanger and a second magnetic suspension natural gas differential pressure power generation system through gas pipelines, and the second magnetic suspension natural gas differential pressure power generation system comprises a second magnetic suspension expansion generator. The cold energy output end of the second magnetic suspension expansion generator is connected with the input end of the first heat exchanger through a gas pipeline, and a second monitoring module and a second flow adjusting valve are sequentially installed on the gas pipeline between the second magnetic suspension expansion generator and the first heat exchanger. The input end of the second magnetic suspension expansion generator is further connected with a temperature rising assembly. According to the utility model, cold energy can be utilized, and the energy utilization rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic levitation natural gas pressure difference power generation and cold energy utilization, and specifically relates to a magnetic levitation natural gas pressure difference power generation and cold energy utilization system. Background Art

[0002] Natural gas pressure must be regulated before entering the pipeline system. During this process, pressure energy is completely consumed by overcoming flow resistance, resulting in a significant waste of pressure energy. However, using pressure differential power generation to convert pressure into electricity significantly improves energy efficiency. Traditional natural gas expansion pressure differential generators have several drawbacks: friction in the expansion generator bearings causes wear during operation, preventing the pressure energy from fully driving mechanical work and reducing efficiency. Compared to ORC waste heat generators, natural gas pressure differential generators use natural gas instead of R245fa as the medium, and the natural gas inlet temperature is generally lower, which can cause ice blockage.

[0003] The successful operation and significant power generation results of magnetic levitation low-temperature waste heat generators suggest a solid technical foundation for their application in the natural gas industry. Magnetic levitation technology enables frictionless support of rotating components, resulting in high efficiency, reliability, low noise, and zero pollution. Existing magnetic levitation natural gas pressure differential power generation systems often employ preheating to improve power generation efficiency, but this underutilizes the cooling capacity of the expander exhaust, resulting in wasted cooling energy. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to provide a magnetic levitation natural gas pressure difference power generation cold energy utilization system, which adopts magnetic levitation technology to improve power generation efficiency, adopts post-heating to avoid ice blockage, and utilizes the cold energy discharged by the expander to improve energy conversion rate.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A magnetic levitation natural gas pressure differential power generation cold energy utilization system includes a first magnetic levitation natural gas pressure differential power generation system, the first magnetic levitation natural gas pressure differential power generation system includes a first magnetic levitation expansion generator, the cold energy output end of the first magnetic levitation expansion generator is connected to a first heat exchanger and a second magnetic levitation natural gas pressure differential power generation system via a gas pipeline, the second magnetic levitation natural gas pressure differential power generation system includes a second magnetic levitation expansion generator, the cold energy output end of the second magnetic levitation expansion generator is connected to the input end of the first heat exchanger via a gas pipeline, a second monitoring module and a second flow regulating valve are sequentially installed on the gas pipeline between the second magnetic levitation expansion generator and the first heat exchanger, and the input end of the second magnetic levitation expansion generator is also connected to a heating component.

[0007] The following is a further optimization of the above technical solution by the present invention:

[0008] A first flow regulating valve is installed at the inlet of the first magnetic levitation expansion generator. The inlet of the first flow regulating valve is electrically connected to a flow monitoring and control system. The input end of the first flow regulating valve is also connected to a natural gas transmission device.

[0009] Further optimization: the flow monitoring and control system includes a first monitoring module, and the first monitoring module includes a first pressure detector, a first temperature detector and a flow detector connected in parallel.

[0010] Further optimization: the output end of the first monitoring module is electrically connected to the flow control module, the flow control module includes a sensor group, the input end of the sensor group is electrically connected to the output end of the first monitoring module, the output end of the sensor group is electrically connected to the controller, and the output end of the controller is electrically connected to the control end of the first flow regulating valve.

[0011] Further optimization: the first magnetic levitation expansion generator includes an expander and a generator, the input end of the expander is connected to the output end of the first flow regulating valve through a gas pipeline, and the output end of the generator is connected to the low-voltage power grid through a cable.

[0012] Further optimization: the heating component includes a second heat exchanger connected to the input end of the second magnetic levitation expansion generator, the input end of the second heat exchanger is connected to an air pump through a gas pipeline, the input end of the air pump is connected to a working fluid storage tank through a gas pipeline, and the input end of the working fluid storage tank is connected to the cold energy output end of the first magnetic levitation expansion generator through a gas pipeline.

[0013] Further optimization: the second monitoring module includes a second temperature detector and a second pressure detector.

[0014] Further optimization: the output end of the first heat exchanger is connected to the cold terminal, and the cold energy released by the first magnetic levitation expansion generator and the second magnetic levitation expansion generator enters the first heat exchanger for heat exchange, and then enters the cold terminal through the gas pipeline for refrigeration.

[0015] The utility model adopts the above technical solution, with ingenious conception and reasonable structure. It uses magnetic levitation technology to achieve frictionless support of the rotating parts of the generator, and has the characteristics of high efficiency, reliability, low noise and pollution-free. It does not adopt pre-heating, but uses post-refrigeration. While generating electricity, it can use the cold energy of the expander exhaust to recover cold energy, and use the cold energy for building cooling and other purposes, thereby ensuring the safety of pressure difference power generation and the energy utilization rate.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the working principle of the overall structure of the utility model.

[0018] In the figure: 1-natural gas transmission device; 2-first magnetic levitation natural gas pressure difference power generation system; 21-first flow regulating valve; 22-first magnetic levitation expansion generator; 221-expander; 222-generator; 23-first monitoring module; 231-first pressure detector; 232-first temperature detector; 233-flow detector; 24-flow control module; 241-sensor group; 242-controller; 3-second magnetic levitation natural gas pressure difference power generation system; 31-second magnetic levitation expansion generator; 32-second heat exchanger; 33-air pump; 34-working fluid storage tank; 4-first heat exchanger; 5-second flow regulating valve; 6-second monitoring module; 61-second temperature detector; 62-second pressure detector; 7-power grid; 8-cold terminal. DETAILED DESCRIPTION

[0019] like Figure 1 As shown: A magnetic levitation natural gas pressure difference power generation and cold energy utilization system includes a first magnetic levitation natural gas pressure difference power generation system 2, the first magnetic levitation natural gas pressure difference power generation system 2 includes a first magnetic levitation expansion generator 22, the cold energy output end of the first magnetic levitation expansion generator 22 is respectively connected to a first heat exchanger 4 and a second magnetic levitation natural gas pressure difference power generation system 3 through a gas pipeline, the second magnetic levitation natural gas pressure difference power generation system 3 includes a second magnetic levitation expansion generator 31, the cold energy output end of the second magnetic levitation expansion generator 31 is connected to the input end of the first heat exchanger 4 through a gas pipeline, a second monitoring module 6 and a second flow regulating valve 5 are sequentially installed on the gas pipeline between the second magnetic levitation expansion generator 31 and the first heat exchanger 4, and the input end of the second magnetic levitation expansion generator 31 is also connected to a heating component.

[0020] A first flow regulating valve 21 is installed at the inlet of the first magnetic levitation expansion generator 22 . The inlet of the first flow regulating valve 21 is electrically connected to a flow monitoring and control system. The input end of the first flow regulating valve 21 is also connected to the natural gas transmission device 1 .

[0021] The flow monitoring and control system includes a first monitoring module 23, which includes a first pressure detector 231, a first temperature detector 232 and a flow detector 233 connected in parallel;

[0022] The output end of the first monitoring module 23 is electrically connected to the flow control module 24, and the flow control module 24 includes a sensor group 241. The input end of the sensor group 241 is electrically connected to the output end of the first monitoring module 23, and the output end of the sensor group 241 is electrically connected to the controller 242. The output end of the controller 242 is electrically connected to the control end of the first flow regulating valve 21.

[0023] This design can detect the pressure, temperature and flow of the natural gas delivered by the natural gas delivery device 1, and feed the detection results back to the sensor group 241. The sensor group 241 transmits the valve adjustment electrical signal to the controller 242, and the controller 242 controls the valve opening size of the first flow control valve 21, thereby controlling the natural gas delivery rate, so that the pressure difference of the natural gas is at the optimal value suitable for power generation.

[0024] The first magnetic levitation expansion generator 22 includes an expander 221 and a generator 222. The input end of the expander 221 is connected to the output end of the first flow regulating valve 21 through a gas pipeline, and the output end of the generator 222 is connected to the low-voltage power grid 7 through a cable.

[0025] With this design, natural gas enters the expander 221 after passing through the first flow regulating valve 21, where it expands and reduces pressure to output mechanical energy. The output mechanical energy enters the generator 222, driving the generator 222 to generate electricity. The generated electricity enters the low-voltage grid 7 through a cable. After the natural gas is expanded and reduced in pressure, its temperature drops and it is discharged from the first magnetic levitation expansion generator 22. Part of it enters the second magnetic levitation natural gas pressure difference power generation system 3, and part enters the first heat exchanger 4. At this time, the temperature of the discharged natural gas is -75~-65℃.

[0026] The heating component includes a second heat exchanger 32 connected to the input end of the second magnetic levitation expansion generator 31. The input end of the second heat exchanger 32 is connected to an air pump 33 through a gas pipeline. The input end of the air pump 33 is connected to a working fluid storage tank 34 through a gas pipeline. The input end of the working fluid storage tank 34 is connected to the cold energy output end of the first magnetic levitation expansion generator 22 through a gas pipeline.

[0027] With this design, the natural gas cold energy output by the first magnetic levitation expansion generator 22 enters the working fluid storage tank 34 for storage, and then enters the second heat exchanger 32 after being pressurized by the air pump 33. The second heat exchanger 32 uses natural wind to exchange heat and heat the natural gas to increase the temperature of the natural gas. The natural gas then enters the second magnetic levitation expansion generator 31 and generates electricity using the pressure difference of the natural gas, which can effectively prevent ice blockage and thereby improve power generation efficiency.

[0028] In this embodiment, the magnetic levitation technology is applied to the bearing systems of the first magnetic levitation expansion generator 22 and the second magnetic levitation expansion generator 31, so that the rotors can rotate at high speed in a contactless state, reducing friction loss and improving the power generation efficiency and reliability of the unit.

[0029] The second monitoring module 6 includes a second temperature detector 61 and a second pressure detector 62 .

[0030] When in use, the second monitoring module 6 detects the temperature and pressure of the natural gas cold energy generated by the second magnetic levitation expansion generator 31, and adjusts the second flow control valve 5 according to the temperature and pressure values ​​to control the natural gas entering the first heat exchanger 4.

[0031] The output end of the first heat exchanger 4 is connected to the cold terminal 8, and the cold energy released by the first magnetic levitation expansion generator 22 and the second magnetic levitation expansion generator 31 enters the first heat exchanger 4 for heat exchange, and then enters the cold terminal 8 through the gas pipeline for refrigeration.

[0032] The cold consumption terminal 8 in this embodiment may be a residential building.

[0033] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. A magnetic levitation natural gas pressure difference power generation and cold energy utilization system, characterized by: The invention comprises a first magnetic levitation natural gas pressure difference power generation system (2), wherein the first magnetic levitation natural gas pressure difference power generation system (2) comprises a first magnetic levitation expansion generator (22), wherein a cold energy output end of the first magnetic levitation expansion generator (22) is respectively connected to a first heat exchanger (4) and a second magnetic levitation natural gas pressure difference power generation system (3) through a gas pipeline, and the second magnetic levitation natural gas pressure difference power generation system (3) comprises a second magnetic levitation expansion generator (31), wherein a cold energy output end of the second magnetic levitation expansion generator (31) is connected to an input end of the first heat exchanger (4) through a gas pipeline, and a second monitoring module (6) and a second flow regulating valve (5) are sequentially installed on the gas pipeline between the second magnetic levitation expansion generator (31) and the first heat exchanger (4), and a temperature increasing component is further connected to the input end of the second magnetic levitation expansion generator (31).

2. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 1 is characterized by: A first flow regulating valve (21) is installed at the inlet of the first magnetic levitation expansion generator (22), the inlet of the first flow regulating valve (21) is electrically connected to a flow monitoring and control system, and the input end of the first flow regulating valve (21) is also connected to a natural gas transmission device (1).

3. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 2 is characterized by: The flow monitoring and control system comprises a first monitoring module (23), wherein the first monitoring module (23) comprises a first pressure detector (231), a first temperature detector (232), and a flow detector (233) connected in parallel.

4. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 3 is characterized by: The output end of the first monitoring module (23) is electrically connected to the flow control module (24), the flow control module (24) comprises a sensor group (241), the input end of the sensor group (241) is electrically connected to the output end of the first monitoring module (23), the output end of the sensor group (241) is electrically connected to the controller (242), and the output end of the controller (242) is electrically connected to the control end of the first flow regulating valve (21).

5. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 4 is characterized by: The first magnetic levitation expansion generator (22) comprises an expander (221) and a generator (222), the input end of the expander (221) being connected to the output end of the first flow regulating valve (21) via a gas pipeline, and the output end of the generator (222) being connected to the low-voltage power grid (7) via a cable.

6. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 5, characterized in that: The temperature raising component comprises a second heat exchanger (32) connected to the input end of the second magnetic levitation expansion generator (31); the input end of the second heat exchanger (32) is connected to an air pump (33) via a gas pipeline; the input end of the air pump (33) is connected to a working fluid storage tank (34) via a gas pipeline; and the input end of the working fluid storage tank (34) is connected to the cold energy output end of the first magnetic levitation expansion generator (22) via a gas pipeline.

7. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 6, characterized in that: The second monitoring module (6) includes a second temperature detector (61) and a second pressure detector (62).

8. The magnetic levitation natural gas pressure difference power generation and cold energy utilization system according to claim 7, characterized in that: The output end of the first heat exchanger (4) is connected to the cold terminal (8), and the cold energy released by the first magnetic levitation expansion generator (22) and the second magnetic levitation expansion generator (31) enters the first heat exchanger (4) for heat exchange, and then enters the cold terminal (8) through the gas pipeline for refrigeration.

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