Liquid nitrogen cycle power generation system method

Abstract

The invention discloses a liquid nitrogen circulation power generation system method. The liquid nitrogen circulation power generation system method comprises a liquid nitrogen storage tank 1, a heat exchanger 2, an efficient power generator 3, a liquid making machine and a compressor 4. The invention relates to a system scheme for generating power through liquid nitrogen circulation, in particular to integrated equipment which gasifies liquid nitrogen through heat exchange to generate high-pressure gas to drive an efficient generator set and converts nitrogen into liquid through a compression or deep freezing method. Each pipeline is provided with a temperature metering device, a pressure metering device, a flow metering device and the like and uploads the data to the control system, the control system adjusts operation parameters of the system according to monitoring data and carries out collection, the collected data are uploaded to a digital cloud, and the purpose of digital operation and maintenance is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of a liquid nitrogen circulation power generation system method, and in particular to an application method for realizing liquid nitrogen circulation. Technical Background

[0002] With the increase of greenhouse gas emissions, global temperature rises, causing a series of serious environmental and ecological problems such as extreme weather and rising sea levels. Reducing carbon emissions has become a key measure to address climate change, which has promoted the research and application of energy-saving and carbon-reduction technologies; traditional fossil energy such as coal, oil, and natural gas have limited reserves, and there are problems such as environmental pollution during mining and use; in order to ensure the sustainability of energy supply and reduce dependence on limited resources, it is necessary to develop energy-saving and carbon-reduction technologies, improve energy utilization efficiency, and develop renewable energy.

[0003] With the development of social economy, a wave of clean energy has been set off in the world. Liquid nitrogen cycle power generation uses liquid nitrogen as raw material, gasifies liquid nitrogen through heat exchange to produce high-pressure gas, and drives turbine generator sets. Nitrogen is converted into liquid by compression or deep freezing. It is an integrated device; nitrogen compression or deep freezing is a necessary procedure for circulating liquid nitrogen power generation, and the efficiency of nitrogen compression or deep freezing is directly related to the power generation efficiency. Therefore, if you want to occupy an active position in the market, you must improve the conversion rate of products, reduce the operating energy consumption of equipment, tap the energy-saving potential of equipment operation, and reduce air pollution as much as possible. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid nitrogen circulation power generation field to overcome the defects of environmental pollution in the current power generation field.

[0005] The technical solution adopted by the present invention is as follows: A system solution for power generation by circulating liquid nitrogen, which gasifies liquid nitrogen through heat exchange to produce high-pressure gas, thereby driving a high-efficiency generator set. Nitrogen is converted into liquid integrated equipment through compression or deep freezing.

[0006] After heat exchange, liquid nitrogen generates high-pressure nitrogen gas which enters the high-efficiency generator set. Driven by the high-pressure nitrogen gas, the high-efficiency generator set converts kinetic energy into electrical energy to obtain efficient clean energy.

[0007] Liquid nitrogen cycle power generation can be used in a wide range of fields: such as boilers, steel, electricity, new materials, building materials, etc.

[0008] Compared with the prior art, the present invention has the following advantages: Compared with hydropower stations, it has low construction costs, short construction periods, and no ecological damage; Compared with thermal power plants, it has low energy consumption, zero emissions and is more environmentally friendly; Compared with nuclear power plants, it is pollution-free and requires a small investment scale; Compared with photovoltaic solar energy, it occupies less space and generates more stable power; BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Flowchart of method for implementing liquid nitrogen cycle power generation system The specific preparation process of liquid nitrogen cycle power generation equipment is as follows: (1) Liquid nitrogen introduction: Connect the liquid nitrogen storage container and introduce liquid nitrogen into the heat exchanger.

[0010] (2) Heat exchange process: Liquid nitrogen exchanges heat with another fluid with a higher temperature (such as gas or liquid) in a heat exchanger; the high-temperature fluid transfers heat to the liquid nitrogen, raising its temperature; the liquid nitrogen in a high-temperature environment instantly vaporizes into high-pressure nitrogen.

[0011] (3) Power generation stage: High-pressure nitrogen is connected to a high-efficiency generator set. Under the impetus of high-pressure nitrogen, the high-efficiency generator set converts kinetic energy into electrical energy to obtain efficient clean energy.

[0012] (4) Liquid production stage: The heated nitrogen enters the compressor or liquid production machine; the compressor or liquid production machine compresses or deep freezes the nitrogen, increases its pressure or lowers its temperature, and reliquefies the nitrogen.

[0013] (5) Recovery and storage: The reliquefied liquid nitrogen is recovered to a storage container or transported to where it is needed for use.

[0014] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes that do not deviate from the present invention are equivalent replacement modes and are included in the protection scope of the present invention.

Claims

1. A liquid nitrogen circulation power generation system method, characterized in that: A liquid nitrogen circulating power generation device comprises (1) a compressor or a liquid making machine; (2) an evaporator; (3) a high-efficiency generator set; (4) a nitrogen storage tank; the circulating liquid nitrogen power generation device comprises the following steps: Step 1: The heat exchanger is connected to a liquid nitrogen storage tank, and the liquid nitrogen introduced is used to absorb heat and cool the heat exchanger. The liquid nitrogen input into the heat exchanger from the liquid nitrogen storage tank is converted into nitrogen gas through the heat source of the heat exchanger to absorb heat and gasify. A pressure meter and a flow meter are installed inside the heat exchanger. Step 2, the expander is connected to the heat exchanger in step 1, and continues to exchange cold energy with the nitrogen introduced into the heat exchanger in step 1 and the refrigerant, so as to remove heat and continue to exchange cold energy; Step 3, the high-efficiency generator set is connected to the expander in step 2, and nitrogen with residual cooling is introduced by using the standard of 640 times the gasification of the expander in step 2 to drive the high-efficiency generator set; Step 4, the liquid making machine is connected to the high-efficiency generator set in step 3, and the nitrogen enters the liquid making machine through the high-efficiency generator set in step 3 to liquefy the nitrogen; Step 5: The liquid nitrogen circulation power generation system is connected to an electrical distribution cabinet.

2. A liquid nitrogen circulation power generation system method according to claim 1, characterized in that: A flow rate and pressure meter for detecting the liquid nitrogen entering the heat exchanger is used. When the liquid nitrogen flow rate is lower than a predetermined value, the flow rate and pressure meter are automatically adjusted.

3. A liquid nitrogen circulation power generation system method according to claim 1, characterized in that: Automatic frequency regulation of the rated pressure value of the high-efficiency generator set. When the heat value of the heat exchanger is lower than the preset value, the power of the heat exchanger and the power of the high-efficiency generator set are controlled.

4. A liquid nitrogen circulation power generation system method according to claim 1, characterized in that: After heat exchange with liquid nitrogen, the heat exchanged nitrogen is liquefied by a liquid making machine.

5. A liquid nitrogen circulation power generation system method according to claim 1, characterized in that: Integrated pipe connection and temperature and pressure control.

6. A liquid nitrogen circulation power generation system method according to claim 1, characterized in that: The liquid nitrogen power generation system is connected to an electrical distribution cabinet, and frequency modulation and digital operation and maintenance capabilities are achieved through real-time detection of the pressure meter and the flow meter on the electrical distribution cabinet.

7. A liquid nitrogen circulation power generation system method according to claim 2, characterized in that: In the step 1, the flow measurement, pressure measurement and temperature measurement entering the heat exchanger are detected, including: liquid nitrogen is connected to the heat exchanger through a pipeline, liquid nitrogen generates nitrogen, the nitrogen pressure value rises and the nitrogen temperature rises, the nitrogen flow rate and the nitrogen pressure and the temperature information are collected and processed, and automatic frequency modulation is performed according to the nitrogen pressure data and the nitrogen temperature data.

8. A method for implementing a liquid nitrogen circulation power generation system as claimed in claim 3, characterized in that: The automatic frequency regulation of the rated pressure value of the high-efficiency generator set includes: after the liquid nitrogen exchanges heat with the heat exchanger, the nitrogen pipe diameter remains unchanged, the nitrogen dynamic pressure rises, and the high-efficiency generator set is connected according to the nitrogen pressure value, and the high-efficiency generator set is driven by the nitrogen dynamic pressure flow rate; the high-efficiency generator set has a built-in pressure and flow collector, and the high-efficiency generator set is tested according to the data collected by the built-in pressure and flow collector of the high-efficiency generator set.

9. A liquid nitrogen circulation power generation system method according to claim 4, characterized in that: Recycling and reusing liquid nitrogen after heat exchange; including: recycling and reusing the nitrogen, according to which the nitrogen after heat exchange has a certain residual cooling condition, the nitrogen is connected to a liquid nitrogen compressor or a liquid making machine, and the recycling purpose is formed according to the reliquefaction of the nitrogen.

10. A liquid nitrogen circulation power generation system method according to claim 5, characterized in that: Integrated connection of pipelines and control of temperature and pressure; including: controlling the temperature of the pipeline and detecting the pressure of the pipeline, and performing integrated temperature and pressure detection and control of the pipeline according to the application of thermal insulation cotton or refrigeration equipment between the pipelines.

11. A liquid nitrogen circulation power generation system method according to claim 6, characterized in that: The temperature meter, the pressure meter, and the flow meter are connected to a control system. The control system adjusts the operating parameters of the system according to the monitoring data for collection, and the collected data is uploaded to the digital cloud to achieve the purpose of digital operation and maintenance.

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