CN117977675A

CN117977675A - Industrial energy internet

Info

Publication number: CN117977675A
Application number: CN202311689019.7A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: University of Science and Technology of China USTC
Current assignee: University of Science and Technology of China USTC
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-05-03

Abstract

The invention discloses an industrial energy internet, which comprises: a power network; at least one plant energy subsystem; at least one synthetic gasification plant; at least one fluid fuel network and a fluid fuel power plant. The industrial energy internet uses plasma energy and hydrogen energy as media, and couples electric power with industrial energy subsystems such as metallurgy, building materials, chemical industry and the like to form the industrial energy internet with power grid-large industrial user-fuel pipe network energy bidirectional flow and/or closed loop flow. The plasma energy equipment and the water electrolysis hydrogen production device are used as adjustable loads of an electric power system, can be used for greatly absorbing fluctuating renewable energy power, and ensure the operation safety of a power grid and energy.

Description

Industrial energy internet

Technical Field

The invention belongs to the technical field of energy Internet, and particularly relates to an industrial energy Internet with a closed loop of power grid-large industrial user-fuel pipe network constructed by taking plasma energy and hydrogen energy as media.

Background

The end consumption of energy sources is mainly electrical energy, thermal energy, kinetic energy and chemical energy (chemical energy storage and materials). Electric energy is an advanced energy source in conventional energy production. Because the electric-thermal, electric-dynamic and electric-chemical energy sources are convenient to convert, and the electric energy lines are convenient and efficient to transport, along with the continuous reduction of clean electric power production cost and transmission cost of photovoltaic, wind power and the like, the production and use of energy sources are increasingly dependent on electric energy, a system network of electric power source-network-charge-storage is continuously developed and enhanced, a large number of distributed power sources are connected, an electric power system is based, and a traffic system (charge storage), a natural gas network, a heat energy pipe network and an information network are combined to form the existing open energy Internet.

The existing energy internet has various problems: firstly, in a power system, because electric energy is difficult to directly store on a large scale, electric power generated by main angle wind power/photovoltaic of clean electric power has volatility and intermittence, and hydrogen energy of renewable energy power with volatility can be absorbed on a large scale, and the cost is difficult to accept in the market due to the difficulties of storage, transportation, canning and the like; the energy network surrounds an open power system, and the heat energy pipe network focuses on energy grading utilization and has limited scale; the traffic (mainly electric automobile) part absorbs the fluctuating renewable energy power; a small amount of gas-steam Combined Cycle Power Plant (CCPP) taking natural gas as fuel partially solves the problem of power grid fluctuation, and coal-fired power generation is still the main force of a power grid and is also the main force of power grid stability; because of wide distributed energy access, the 'source-network-load-storage' interactive regulation and control of the energy Internet is based on an information network; however, the physical main body of the energy network is unidirectional, the space-time distribution of the source-charge is unbalanced, the inertia (energy storage) of the system is insufficient, the cooperative regulation of the source-network-charge-storage is not exerted, and the development of renewable energy power is greatly limited.

Disclosure of Invention

In view of the above, the invention is necessary to provide an industrial energy internet which can consume a great deal of renewable energy power with fluctuation and ensure the operation safety of a power grid and energy.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The invention provides an industrial energy internet, which comprises:

an electrical power network for providing electrical power, including power generation, power delivery, and power consumers; wherein the electricity production comprises a fluctuating renewable energy power station with a network capacity of more than 30%, and particularly mentioned examples of such renewable energy power stations are photovoltaic power stations and/or wind power stations.

At least one plant energy subsystem comprising an industrial kiln and a plasma energy device, the plasma energy device utilizing electrical energy to generate plasma energy, the generated plasma energy being used to heat and convert carbon dioxide to produce gas;

At least one synthesis gasification plant comprising an electrolyzed water hydrogen plant and a synthesis gas synthesis plant that synthesizes gaseous fuel, and/or liquid fuel, and/or other organic material using hydrogen produced by the electrolyzed water hydrogen plant and gas produced by the plant energy subsystem;

At least one fluid fuel pipe network, wherein the fluid fuel pipe network is a gaseous fuel pipe network or a liquid fuel pipe network, and is used for storing and/or transporting gaseous or/and liquid fuel, including gas produced by the plant energy subsystem and gaseous and/or liquid fuel produced by the synthesis gasification plant;

And a fluid fuel power plant for generating electricity using said fluid fuel from gas produced in said plant energy subsystem and/or gaseous and/or liquid fuel produced in said synthetic gasification plant. The fluid fuel power plant may employ a power plant common in the art, and specific examples that may be mentioned include, but are not limited to, a gas-steam Combined Cycle Power Plant (CCPP), a hydrogen fuel cell power plant, or other power plants using gaseous and/or liquid fuel, preferably the fluid fuel power plant is a gas-steam Combined Cycle Power Plant (CCPP).

The plasma energy equipment and the water electrolysis hydrogen production device are used as adjustable loads of an electric power system to consume intermittent renewable energy power; the adjustable-output power plant in the fluid fuel power plant acting power grid is used for peak shaving or/and frequency modulation power generation of a power system.

Further, the plant energy subsystem comprises at least one plant, the plant being a ferrous metallurgical plant and/or a cement plant, the ferrous metallurgical plant comprising a blast furnace, the cement plant comprising a cement kiln.

Further, the ferrous metallurgy factory comprises at least one blast furnace and a plasma energy device, wherein the plasma energy device is matched with the blast furnace; the plasma energy equipment is used for providing energy required by the blast furnace for iron making and converting carbon dioxide generated by the blast furnace to obtain coal gas.

Further, the ferrous metallurgy factory further comprises a gas separator, wherein the gas separator is used for separating carbon dioxide in the gas discharged from the blast furnace to obtain pure gas.

Further, the cement plant comprises at least one cement kiln and a plasma energy device, wherein the plasma energy device is matched with the cement kiln; the plasma energy device is used for providing the energy required by the cement production process and converting carbon dioxide to obtain coal gas.

Further, the cement plant also comprises a gas separator, wherein the gas separator is used for separating carbon dioxide in the gas discharged from the cement kiln to obtain pure gas.

Further, the fluid fuel power plant is independently present in the industrial energy internet and/or included in the plant energy subsystem.

Further, the synthetic gasification plant is independently present in the industrial energy internet and/or included in the plant energy subsystem.

Further, the industrial energy internet further comprises an oxygen pipe network, wherein the oxygen pipe network is used for storing oxygen produced by the electrolytic water hydrogen production device and/or conveying the oxygen produced by the electrolytic water hydrogen production device to the factory energy subsystem and/or the fluid fuel power plant.

Further, the industrial energy internet further comprises a carbon dioxide pipe network, the carbon dioxide pipe network comprises a carbon dioxide storage bag, the carbon dioxide pipe network is communicated with the plurality of different plant energy subsystems and/or communicated with the fluid fuel power plant and/or the CO ₂ permanent sealing place and the like, and the carbon dioxide pipe network is used for adjusting the carbon dioxide treatment capacity of different plants, adjusting the fluctuation of the CO ₂ treatment capacity of the electric load of the plasma energy equipment and transporting CO ₂ to the permanent sealing place for sealing.

The invention has the beneficial effects that:

in the industrial energy Internet, the two-way flow of the gas energy is formed by the gas production of the factory energy subsystem and the use of a gas fuel and fluid fuel pipe network; the electric load of the factory energy subsystem and the gas-liquid fuel power generation in the factory energy subsystem form the bidirectional flow of the electric power of the electric network and the factory energy subsystem.

The industrial energy Internet takes plasma energy and hydrogen energy as media, and is coupled with an electric power-metallurgy, building materials and chemical industry energy subsystem-fuel pipe network to form the closed-loop industrial energy Internet of a power grid-industrial load/fuel production-fuel pipe network-power generation-power grid.

In the energy internet operation mode, the renewable energy source generates electricity to provide main electric energy of a power grid, the water electrolysis hydrogen production and the factory energy subsystem are main loads of the power grid and are adjustable power loads, and the renewable energy source is balanced with the power; the plasma can convert CO ₂ to generate coal gas and synthesize hydrogen generated by hydrogen production by water electrolysis into gaseous and/or liquid fuel; meanwhile, the plasma energy is converted into CO ₂ to generate coal gas to provide peak regulation power generation for power grid power generation peak regulation and frequency modulation for the fluid fuel power plant; the liquid fuel is stored in large quantities for long periods of time to supply renewable energy power fluctuations in the balance grid of a fluid-fuelled power plant.

The energy internet can consume a large amount of fluctuating renewable energy power, solves the problem of electric energy storage, ensures the operation safety of a power grid and energy, solves the problem of difficult storage and transportation of hydrogen energy, realizes carbon dioxide utilization, and provides a large amount of liquid fuel.

The main effects of the invention are as follows:

① The 'power grid-industrial power load-fuel pipe network-power grid' closed-loop network connected by industrial users is constructed, and the 'source-network-load-storage' cooperative regulation of the energy Internet is realized;

② Solves the problems of carbon dioxide emission, conversion and utilization in the industries of steel, cement, chemical industry and the like;

③ The renewable energy power can be greatly consumed;

④ Can solve the problem of hydrogen storage and/or transportation;

⑤ The traditional industrial kiln is utilized to produce the additional high-heat-value pure gas, and the produced high-heat-value pure gas does not contain nitrogen, can be used for generating high efficiency with chemical synthetic fuel, and is beneficial to capturing and recycling CO ₂;

⑥ The hydrogen production by water electrolysis generates oxygen for combustion and utilization, which is beneficial to CO ₂ capture.

Drawings

FIG. 1 is a schematic diagram of an implementation of the industrial energy Internet in example 1;

FIG. 2 is a schematic diagram of the implementation of the Internet of industrial energy in example 2;

Fig. 3 is a schematic diagram of an implementation of the industrial energy internet in example 3.

Detailed Description

The following detailed description of embodiments of the invention is exemplary and is provided merely to illustrate the invention and is not to be construed as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Terms herein

(1) Plasma energy: the thermal plasma is a cluster of particles such as electrons, ions, excited particles, active free radicals and the like, and is a high-grade carrier of light energy, heat energy and chemical energy, namely plasma energy.

(2) Plasma energy apparatus (device): devices (apparatuses) that convert electric energy into plasma energy and directly utilize the energy thereof or/and output the energy thereof, such as arc furnaces, plasma torches, plasma reactors, plasma generators, and the like.

(3) Gas-gas separator: the method is used for separating and capturing CO ₂ in the gas discharged from the industrial kiln, and the rest is mainly CO, H ₂ and the like.

The invention provides an industrial energy internet, which uses plasma energy and hydrogen energy as media to be coupled with an electric power-metallurgy/building material/chemical industry industrial energy subsystem to form an industrial energy internet of power grid-industrial load/fuel production-fuel pipe network-power grid, and the energy of the industrial energy internet can flow in a bidirectional and closed-loop manner.

In an exemplary embodiment of the invention, the industrial energy internet comprises an electrical power network, at least one plant energy subsystem, at least one fluid fuel pipe network, at least one synthetic gasification plant, and at least one fluid fuel power plant.

The power network described in the present invention is a grid of a conventional power system in the art for providing electrical energy to plant energy subsystems and synthetic gasification plants. The grid of an electrical power system includes power generation (power production), power transmission and transformation networks, and power consumers. The power generation comprises a nuclear power plant, a hydropower plant, a coal-fired power plant, a gas power plant and a renewable energy power plant; the power consumer includes large industrial consumer, agricultural consumer, civil business consumer, etc. In some embodiments of the invention, the power network capacity comprises more than 30% of a fluctuating renewable energy power plant, where the renewable energy power plant is a power plant conventional in the art, examples that may be specifically mentioned include, but are not limited to, photovoltaic power plants, wind power plants, hydro power plants, tidal power plants, wave energy power plants, and the like; alternatively, the renewable energy power station employs a photovoltaic power station or a wind power station.

The factory energy subsystem comprises a high-temperature industrial kiln and plasma energy equipment, wherein the high-temperature industrial kiln can be used for discharging carbon dioxide through reduction reaction or discharging carbon dioxide through carbonate pyrolysis; the plasma energy device is matched with the industrial kiln, in particular, the plasma energy device converts electric energy into plasma energy, and the generated plasma energy can provide heat energy of the industrial kiln and energy required by converting carbon dioxide generated by the industrial kiln into coal gas. It is understood that the plasma energy apparatus employed may be conventional in the art, such as the plasma energy apparatus disclosed in the chinese patent application of the invention of publication No. CN115612769 a. It is worth noting that the plasma energy equipment is used as an adjustable load of an electric power system at the same time, CO ₂ is converted into gas through plasma energy heat supply, and the main component of the gas is CO, so that the transportation and the utilization are convenient; about 30% of the chemical energy in the gas comes from the plasma energy. The plant energy subsystem may also include production of lime, glass, ceramics, refractory materials, various metal smelters, etc., which may also use plasma energy, and/or produce CO ₂ emissions.

Further, the plant energy subsystem of the invention refers to a plant energy system such as metallurgy and/or building materials, for example, a ferrous metallurgy plant with a blast furnace, and a cement plant with a cement kiln. According to different factory forms, different embodiments are provided, and corresponding high-temperature industrial kilns are different.

In some embodiments of the invention, the plant energy subsystem is a ferrous metallurgical plant, in which case the industrial kiln is a blast furnace. The ferrous metallurgy factory at least comprises a blast furnace and plasma energy equipment matched with the blast furnace. The plasma energy equipment converts electric energy into plasma energy through gas discharge, and the generated plasma energy provides energy required by blast furnace ironmaking and converting carbon dioxide separated from coal gas discharged from the blast furnace into coal gas.

Specifically, the plasma energy equipment of the ferrous metallurgy factory converts electric energy into plasma energy to provide the blast furnace heat energy; in the plasma energy device and/or the blast furnace, the plasma energy heats and converts carbon dioxide and hydrocarbon (coal dust, biomass or the like) into high-temperature coal gas (> 2500K, mainly containing carbon monoxide and a small amount of hydrogen), the high-temperature coal gas provides energy required for reducing iron ore and most of reducing agent, and the coal gas discharged from the blast furnace is mainly carbon monoxide, carbon dioxide, a small amount of hydrogen and water.

Optionally, the ferrous metallurgy factory further comprises a gas-gas separator, wherein the gas-gas separator can separate carbon dioxide in the gas discharged from the blast furnace to obtain pure gas, and the pure gas mainly contains carbon monoxide and a small amount of hydrogen. The pure coal gas (mainly containing carbon monoxide, carbon dioxide and a small amount of hydrogen) is obtained by removing carbon dioxide through the gas separator, and the pure coal gas can enter a coal gas pipe network for storage and/or transportation; the separated carbon dioxide can be recycled back to the plasma energy device and/or blast furnace for reprocessing.

In other embodiments of the invention, the plant energy subsystem is a cement plant, in which case the industrial kiln is a cement kiln. The cement plant comprises at least one cement kiln and plasma energy equipment matched with the cement kiln. The plasma energy equipment converts electric energy into plasma energy, and the generated plasma energy provides energy required by the cement production process and pure coal gas.

Specifically, the plasma energy equipment of the cement plant converts electric energy into plasma energy to provide the cement kiln heat energy; in a decomposing furnace of a cement kiln which is supplied with heat by plasma energy equipment, the plasma energy supplies heat to convert carbon dioxide into high-temperature gas (mainly containing carbon monoxide and a small amount of hydrogen), limestone in the decomposing furnace of the cement kiln can decompose carbon dioxide, the high-temperature gas supplies energy required for decomposing the limestone, and the gas discharged from the decomposing furnace of the cement kiln is mainly carbon monoxide, carbon dioxide, a small amount of hydrogen and water.

Optionally, the cement plant further comprises a gas-gas separator. The gas separator can separate carbon dioxide in the gas discharged from the cement kiln to obtain pure gas, the pure gas mainly contains carbon monoxide and a small amount of hydrogen, and the obtained pure gas can enter a gas pipe network for storage and/or transportation; the separated carbon dioxide can be recycled back to the plasma energy device and/or the cement kiln and converted into gas.

The synthesis gasification factory comprises an electrolytic water hydrogen production device and a synthesis gas synthesis device. The electrolytic water hydrogen production device is used for converting electric energy into hydrogen energy and simultaneously used as a depth-adjustable power load of the power system; the synthesis gas synthesis device synthesizes the hydrogen and the coal gas generated by the factory energy subsystem into gaseous fuel and/or liquid fuel and/or other organic materials, thereby being convenient for the storage, transportation and utilization of hydrogen energy. In particular, the electrolytic water hydrogen production device utilizes electric energy to generate hydrogen, the generated hydrogen is mainly used as chemical energy, and in order to facilitate the storage and utilization of hydrogen energy, the synthesis gas synthesis device is used for synthesizing the hydrogen generated by the electrolytic water hydrogen production device and pure coal gas generated by a factory energy subsystem into gaseous fuel and/or liquid fuel (such as methanol, glycol, gasoline and the like) and/or other organic materials (such as olefin, benzene and the like). Wherein the synthetic gaseous fuel is typically methane (synthetic natural gas); the synthesized liquid fuel is used as a hydrogen energy carrier, is favorable for storage and transportation, can be stored for a large amount for a long time, is used for fuel power generation of a fluid fuel power plant, and can balance the long-time fluctuation of renewable energy power. Notably, the electrolytic water hydrogen production device can be used as a depth-adjustable power load of a power system to realize power balance of a power network. The synthesis gas synthesis apparatus according to the present invention may be an apparatus for synthesizing ammonia using hydrogen and nitrogen.

The fluid fuel pipe network mainly comprises a fluid pipeline and a storage bag (tank), wherein the fluid fuel pipe network comprises a gas fuel pipe network or/and a liquid fuel pipe network; the fluid fuel pipe network is used for storing and/or transporting the gaseous fuel or the liquid fuel produced by the energy internet, and particularly comprises coal gas produced in a factory energy subsystem and/or gaseous fuel and/or liquid fuel produced by a synthesis gasification factory.

In some embodiments of the invention, the gaseous fuel network is a gas network, or/and a natural gas network;

The gas pipe network mainly comprises a gas pipeline and a gas storage bag, and is mainly used for storing and/or transporting gas produced by an energy subsystem of a factory, wherein the gas can be pure gas after separation or gas containing carbon dioxide. It will be appreciated that the gas network may exist as a stand-alone unit in the industrial energy internet or may be included in a plant energy subsystem; the gas pipe network mainly conveys the gas produced by the factory energy subsystem to a synthesis gasification factory and/or a fluid fuel power plant and/or stores and conveys the gas in the factory energy subsystem;

the natural gas pipe network mainly comprises a natural gas pipeline and a natural gas storage bag and is mainly used for storing and/or transporting natural gas produced by a synthetic gasification factory; the natural gas pipe network mainly conveys the synthetic natural gas produced by the synthetic gasification factory to a fluid fuel power plant; the natural gas pipe network can also be an existing natural gas pipe network.

In other embodiments of the invention, the gas network may be integrated with an existing natural gas network.

In some embodiments of the invention, the liquid fuel piping network is composed primarily of liquid piping and liquid storage tanks, and is primarily used to store and/or transport liquid fuel produced by a synthetic gasification plant to a fluid fuel power plant.

The fluid fuel power plant refers to a power plant which uses the fluid fuel for power generation, and can use gas of the gas pipe network and/or gaseous fuel and/or liquid fuel synthesized by a synthesis gas synthesis device in a synthesis gasification plant for power generation. Examples of fluid fuel power plants specifically mentioned in the present invention include, but are not limited to, gas-steam Combined Cycle Power Plants (CCPP), and/or fuel cell power plants. The CCPP can be compatible with natural gas, coal gas and liquid fuel to generate electricity; fuel cell power plants include the use of hydrogen fuel cells and/or solid oxide fuel cells to generate electricity, for which a gaseous or liquid fuel is converted to hydrogen. It will be appreciated that the fluid-fuelled power plant may exist independently in the industrial energy internet, may be included in the electrical power network, or may be included in the plant energy subsystem.

In some preferred embodiments of the present invention, the industrial energy internet further comprises an oxygen network consisting essentially of an oxygen storage bag and an oxygen pipeline. The oxygen pipe network is coupled to an electrolyzed water hydrogen plant, a plant energy subsystem, and/or a fluid fuel power plant. Specifically, oxygen generated by the electrolytic water hydrogen production device is transported to an oxygen pipe network for storage and/or provided to a factory energy subsystem and/or a fluid fuel power plant for combustion, so that carbon dioxide capture is facilitated; it will be appreciated that when oxygen is used for combustion, carbon dioxide may be added to the fuel to adjust the combustion temperature.

In some preferred embodiments of the present invention, the industrial energy internet further comprises a carbon dioxide network consisting essentially of carbon dioxide lines and carbon dioxide storage bags. The carbon dioxide pipe network can be connected with different factory energy subsystems, fluid fuel power plants, other carbon dioxide utilization areas and permanent landfill areas; the invention can adjust the carbon dioxide treatment capacity of different factories by utilizing the carbon dioxide pipe network, or store carbon dioxide when the power supply is insufficient and convert the carbon dioxide again when the power supply is rich.

The industrial energy Internet takes plasma energy and hydrogen energy as media, and forms the closed-loop industrial energy Internet of power grid-large industrial user-fuel pipe network-power grid by coupling the 'electric power/metallurgy/building material/chemical industry' industrial energy subsystem.

In some embodiments of the invention, the power network provides the electric energy of the plasma energy equipment in the factory energy subsystem, the plasma energy equipment can be combined with the industrial kiln to produce gas, the produced gas enters a gas pipe network, the gas pipe network provides the gas of the fluid fuel power plant, and the fluid fuel power plant generates electricity to supply the electric network to form a closed loop of the energy network. The plasma energy equipment in the factory energy subsystem is an adjustable power load, and a large amount of renewable energy power is consumed.

In other embodiments of the invention, the power network provides electrical power to a plasma energy device in the plant energy subsystem, which may be combined with an industrial kiln to produce gas, the produced gas entering a gas network. The electric power network provides electric energy for the water electrolysis hydrogen production device, and the water electrolysis hydrogen production device generates hydrogen; the synthesis gas factory synthesizes gaseous fuel and/or liquid fuel by using gas stored in a gas pipe network and hydrogen generated by an electrolytic water hydrogen production device; the gaseous fuel and/or liquid fuel may be transported to a fluid fuel power plant for power generation, which is then circulated to a power network, forming a closed loop of the energy network. The electrolytic water hydrogen production device is an adjustable power load and can consume a large amount of renewable energy power.

The industrial energy internet can balance the renewable energy power generation power of the power grid of the power system by adjusting the load of the water electrolysis hydrogen production device and the load of the plasma energy equipment (for producing coal gas); meanwhile, when the power supplied by the power grid is insufficient, the fluid fuel power plant is used for generating electricity to realize frequency modulation or peak shaving power generation to realize power balance; the electric load adjusting range of the hydrogen production by water electrolysis is rated maximum load to 0; the power load adjustment range of the plasma energy equipment is rated maximum load to 0.

In some preferred embodiments, the carbon dioxide separated from the gas produced by the industrial kiln is stored when the power supply is insufficient, and the stored CO ₂ is converted into gas when the power supply is abundant due to the inclusion of a carbon dioxide pipe network.

The energy internet can consume a large amount of fluctuating renewable energy power, solves the problem of electric energy storage, ensures the operation safety of a power grid and energy, solves the problem of hydrogen energy utilization, provides a large amount of liquid fuel and realizes carbon dioxide utilization.

The industrial energy internet according to the present invention will be specifically described with reference to the specific embodiments.

Example 1

One implementation of the industrial energy internet (as shown in fig. 1) is shown in this example.

The industrial energy internet comprises a power grid 1, a plant energy subsystem 2, a synthetic gasification plant 3, a gas pipe network 4, a fluid fuel power plant 5 and a natural gas pipe network 6.

Wherein the power grid 1 is a power network in which a plurality of power stations and power consumers are interconnected, wherein the plurality of power stations comprises a plurality of renewable energy power stations, including photovoltaic power stations, wind power stations, etc.

The plant energy subsystem 2 includes an electrical load and gas production, wherein the electrical load is primarily a plasma energy device 20. The plasma energy equipment converts electric energy into plasma energy, and coal or biomass is combined to convert carbon dioxide into coal gas, wherein the main components of the coal gas are CO and a small amount of H ₂, and the coal gas is supplied to heat energy of the industrial kiln 21; the main components of the gas produced by the industrial kiln 21 are CO ₂, CO and a small amount of H ₂, and CO ₂ is separated by a gas separator 22 to obtain pure gas. Specifically, the plant energy subsystem 2 includes an industrial furnace 21 and a plasma energy apparatus 20 matched with the industrial furnace, and the type of the industrial furnace 21 is different according to different plant forms, and the plant energy subsystem 2 may be a ferrous metallurgy plant including a blast furnace or a cement plant including a cement kiln, which will not be described in detail herein.

The plurality of plant energy subsystems 2 may be respectively coupled to the grid 1 by a plurality of power lines 12; the plurality of plant energy subsystems may be coupled to the gas pipe network 4 by a plurality of gas lines 24, respectively.

The synthesis gasification plant 3 mainly comprises an electrolyzed water hydrogen plant 30 and a synthesis gas synthesis plant 31. Wherein the synthesis gas synthesis unit 31 produces methane (synthetic natural gas); the synthesis gasification plant 3 may also include a hydrogen storage package that disables the hydrogen plant at zero power supply and stores hydrogen to ensure continuous operation of the synthesis gas synthesis plant. The power grid 1 provides the electric energy of the synthetic gasification plant 3 via a power line 13, wherein the main electric load is an electrolyzed water hydrogen plant 30; the gas pipe network 4 is coupled to the synthesis gasification plant 3 via a gas pipe 43 for providing the gas required by the synthesis gas synthesis plant 31.

The gas pipe network 4 mainly comprises a gas storage bag and gas pipelines (24, 42, 43). The coal gas produced by the plant energy subsystem 2 is conveyed to the coal gas pipeline 4 for storage through the coal gas pipeline 24 after being separated from CO ₂ and conveyed to the synthesis gasification plant 3 through the coal gas pipeline 43, and the coal gas stored in the coal gas pipeline 4 can also be reversely conveyed to the plant energy subsystem 2 through the coal gas pipeline 42; the gas produced by the factory energy subsystem 2 can also directly enter a gas pipe network without CO ₂ separation or partial CO ₂ separation.

The natural gas network 6 is an existing natural gas network. Synthetic natural gas (methane as a main component) produced by the synthetic gasification plant 3 enters the natural gas pipe network 6 through the natural gas pipeline 36 and is transported to the fluid fuel power plant 5 through the natural gas pipeline 65 to generate electricity, wherein the fluid fuel power plant 5 is CCPP in the embodiment.

In specific operation, the power grid 1 transmits the generated power ① to the plasma energy device 20 of the factory energy subsystem 2 through the power line 12, the plasma energy device 20 converts electric energy into plasma energy, and the generated plasma energy provides energy required by the industrial kiln 21 for heating and converting carbon dioxide into coal gas; meanwhile, the plasma energy apparatus 20 may be used as an adjustable load for an electric power system. ② The water electrolysis hydrogen production device is transported to the synthesis gasification factory 3 through the power line 13, the main power load is the water electrolysis hydrogen production device 30, and the water electrolysis hydrogen production device 30 is the adjustable load of the power system.

The gas generated by the factory energy subsystem 2 is transported to the gas pipe network 4 through the gas pipeline 24 for transferring and storing, and meanwhile, the gas in the gas pipe network 4 can be reversely supplied to the factory energy subsystem 2 through the gas pipeline 42.

The electrolytic water hydrogen plant 30 generates hydrogen by using electric energy, the generated hydrogen is transported to the synthesis gas synthesis device 31 through the hydrogen pipeline 33, meanwhile, the gas pipe network 4 transports gas to the synthesis gas synthesis device 31 through the gas pipeline 43, the synthesis gas synthesis device 31 synthesizes natural gas (methane) by using the hydrogen and the gas, and the hydrogen is transported to the natural gas pipe network 6 for storage and/or transportation through the natural gas pipeline 36.

The natural gas pipe network 6 transports natural gas through a natural gas line 65 to the fluid-fuelled power plant 5 for power generation.

The fluid-fueled power plant 5 in this embodiment is a gas-steam Combined Cycle Power Plant (CCPP) that can be used for frequency modulation and peak shaving of an electrical power system. The energy efficiency of the combined cycle of the fuel gas and the steam can reach more than 60 percent, the relative efficiency is more than 20 percent higher than that of the common coal-fired power generation, and the emission of CO ₂ is correspondingly reduced; meanwhile, the CCPP is suitable for peak regulation and frequency modulation power generation.

In this embodiment, the synthetic gasification plant 3 may be included in the plant energy subsystem 2, which may reduce the gas piping of the gas pipe network 4.

The gas pipe network 4 is in bidirectional transportation with the factory energy subsystem 2 through gas pipelines (24, 42), so that energy in the energy network flows bidirectionally.

The power generated by the fluid-fuel power plant 5 is then cyclically transported into the power grid 1, thereby forming a closed loop of the energy network.

In the industrial energy internet in the embodiment, the electrolytic water hydrogen production device 30 and the plasma energy equipment 20 in the factory energy subsystem 2 are used as the adjustable load of the power system, so that renewable energy power can be greatly consumed, and the problems of conversion of industrial emission carbon dioxide and hydrogen storage and transportation are solved.

Example 2

Another specific implementation of the industrial energy internet (as shown in fig. 2) is shown in this example.

The industrial energy internet comprises a power grid 1, a plant energy subsystem 2, a synthetic gasification plant 3, a gas pipe network 4, an oxygen pipe network 32, a fluid fuel power plant 5 and a liquid fuel pipe network 7.

The plant energy subsystem 2 converts carbon dioxide into gas by using electric energy, and the gas is separated to obtain pure gas, specifically, the plant energy subsystem 2 comprises an industrial kiln 21 and a plasma energy device 20 (see fig. 1 specifically) matched with the industrial kiln 21, the specific type of the industrial kiln 21 is different according to different plant forms, and the plant energy subsystem 2 can be a ferrous metallurgy plant containing a blast furnace or a cement plant containing a cement kiln, which is not specifically described herein.

The synthesis gasification plant 3 includes an electrolyzed water hydrogen plant 30 and a synthesis gas synthesis plant 31. The synthesis gas synthesizing device 31 produces liquid fuel, such as methanol, gasoline, etc., which is convenient for long-term storage and transportation, and is used for regulating long-term power fluctuation of the power grid and moving energy fuel. The energy conversion efficiency of the synthetic methanol is high, and the synthetic gasoline can directly enter the existing gasoline pipeline and a gas station; the synthetic product in this example was methanol.

The gas pipe network 4 mainly comprises gas pipelines (24, 42, 43, 45) and gas storage bags in the pipe network.

In specific operation, the power grid 1 transmits the generated power ① to the plasma energy device 20 of the factory energy subsystem 2 through the power line 12, the plasma energy device 20 converts electric energy into plasma energy, and the generated plasma energy provides energy required by the industrial kiln 21 for heating and converting carbon dioxide into coal gas; meanwhile, the plasma energy apparatus 20 may be used as an adjustable load for an electric power system. ② Is transmitted to the electrolytic water hydrogen production device 30 through the power line 13, and the electrolytic water hydrogen production device 30 is used as an adjustable power load of a power system.

The gas generated by the factory energy subsystem 2 is transported to the gas pipe network 4 for storage through the gas pipe 24, meanwhile, the gas pipe network 4 can also reversely supply the gas to the factory energy subsystem 2 through the gas pipe 42, and can also supply the gas to the fluid fuel power plant 5 through the gas pipe 45.

The electrolytic water hydrogen production device 30 generates hydrogen by using electric energy, the generated hydrogen is transported to the synthesis gas synthesis device 31 through the hydrogen pipeline 33, meanwhile, the gas pipe network 4 transports gas to the synthesis gas synthesis device 31 through the gas pipeline 43, the synthesis gas synthesis device 31 synthesizes liquid fuel by using the hydrogen and the gas, and the liquid fuel is transported to the liquid fuel pipe network 7 for storage and/or transportation through the liquid fuel transportation line 37. In addition, oxygen produced by the electrolyzed water hydrogen plant 30 enters an oxygen pipeline 32 (storage package), and oxygen ① in the oxygen pipeline 32 is transported to the plant energy subsystem 2 through an oxygen pipeline 35; ② Is transported into the fluid-fuel power plant 5 via an oxygen line 35.

In addition, the liquid fuel piping network 7 includes a liquid fuel line 75 and a liquid fuel storage tank. Delivering a fuel supply to the fluid fuel power plant 5 via a liquid fuel line 75 for generating electricity; other transportation means may also be provided to the fluid-fuelled power plant.

The fluid-fueled power plant 5 described in the present invention is a CCPP, and the generated power is cyclically transmitted to the power grid 1 via the power line 15, thereby forming a closed loop of the energy network.

In the industrial energy internet in the embodiment, the electrolytic water hydrogen production device 30 and the plasma energy equipment 20 in the factory energy subsystem 2 are used as the adjustable load of the power system, so that renewable energy power can be greatly consumed, the problem of converting and utilizing industrial discharged carbon dioxide is solved, and the generated coal gas is used for synthesizing with hydrogen and used as a hydrogen carrier, and the problem of storing and transporting hydrogen is solved. At the same time, the gas pipe network 4 provides the daytime peak shaving power generation fuel of the fluid fuel power plant 5, and the long-time peak shaving power generation uses the liquid fuel stored in the liquid fuel pipe network 7.

Example 3

This example shows a specific implementation of the industrial energy internet, which is further enlarged on the basis of the industrial energy internet of example 1 or example 2 (see in particular fig. 3), comprising, a power grid 1, a gas pipe network 4, a liquid fuel pipe network 7, a carbon dioxide pipe network 23 and an oxygen pipe network 32, and the listed partial plant energy subsystems (2-1, 2-2, 2-3), a separate synthetic gasification plant 3-0, and the listed fluid fuel power plants 5-3, etc.; wherein the plant energy subsystem (2-1, 2-2) comprises a synthetic gasification plant (3-1, 3-2) respectively, and the plant energy subsystem (2-1, 2-2) comprises a fluid fuel power plant (5-1, 5-2) respectively. Wherein the gas pipe network 4 is also compatible with existing natural gas pipe networks. Wherein the factory energy subsystem 2-3 comprises an industrial kiln using plasma energy, or/and an industrial kiln using coal gas, or/and an industrial kiln generating coal gas.

The power grid 1 in the present embodiment is a renewable energy power grid (VRE) of a wave nature, a power network interconnected by a plurality of power plants (stations) and consumers of electricity. In this embodiment, the power grid 1 includes a plurality of power stations (1-1, 1-2,1-3,1-4,1-5,1-6,1-7,1-8, and 1-9), wherein the power stations (1-1, 1-2,1-3,1-4,1-6,1-8, and 1-9) are renewable energy power stations, the power stations (1-5, 1-7) are conventional power stations, the power stations 1-5 are thermal power stations, the power stations 1-7 are nuclear power stations, and the thermal power stations may include coal-fired power stations, biomass power stations, garbage power stations, fuel power stations, and/or gas power stations, and the like; the power grid 1 carries out power transmission to the factory energy subsystems (2-1, 2-2, 2-3) through power lines (12, 13, 15) respectively, wherein the factory energy subsystems (2-1, 2-2) respectively comprise fluid fuel power plants (5-1, 5-2) and can reversely transmit power to the power grid 1; the synthetic gasification plant 3-0 may be powered by a separate power plant 1-1, the power plant 1-1 may be a wind power plant and/or a photovoltaic power plant, the power plant 1-1 may also be coupled to the power grid 1, being part of the power grid 1.

In this embodiment, a plurality of plant energy subsystems (2-1, 2-2, and 2-3) are included, for example, plant energy subsystem 2-1, which includes industrial kiln 21-1 and plasma energy device 20-1. The factory energy subsystem (2-1, 2-2) converts carbon dioxide into coal gas by utilizing electric energy, and pure coal gas is obtained through separation; the produced gas enters the (gas pipe network 4-1, 4-2) contained in the factory energy subsystem (2-1, 2-2) and is transported to the gas pipe network 4 of the industrial energy internet, and the gas pipe network 4 can also transport the gas to the factory energy subsystems (2-1, 2-2 and 2-3); the factory energy subsystem 2-3 can also transport the generated coal gas to the coal gas pipe network 4; the plant energy subsystems (2-1, 2-2) also respectively comprise a synthesis gasification plant (3-1, 3-2), the hydrogen production device of the synthesis gasification plant is powered by the power grid 1, and the synthesis gasification plant (3-1, 3-2) respectively uses gas produced in the corresponding plant energy subsystem (2-1, 2-2) to synthesize liquid fuel and can also use 4 gas from a gas pipe network of the industrial energy Internet.

In this embodiment, a plurality of synthetic gasification plants (3-0, 3-1 and 3-2) are included, wherein the synthetic gasification plants 3-0 independently exist in the industrial energy internet in this embodiment and are connected with the power station 1-1, the power station 1-1 independently supplies power, and the synthetic gasification plants (3-1, 3-2) respectively exist in the plant energy subsystems (2-1, 2-2).

The gas pipe network 4 in this embodiment includes a plurality of gas pipe networks (4-1, 4-2) inside the industrial energy subsystem (2-1, 2-2), and the plant energy subsystem, the flow fuel power plant, and the synthetic gasification plant are interconnected with the gas pipe network 4 through a plurality of gas pipes 45'.

The carbon dioxide pipe network 23 in this embodiment includes carbon dioxide pipes (202, 202') connected to a plurality of plant energy subsystems, a plurality of fluid fuel power plants and a CO ₂ landfill (indicated by arrows in the figure) for the treatment adjustment and utilization of CO ₂ discharged from different systems, wherein the plant energy subsystems (2-1, 2-2) may include carbon dioxide pipe networks (23-1, 23-2) respectively for the adjustment of the treatment of CO ₂ in the corresponding plant energy subsystems.

The liquid fuel pipe network 7 in this embodiment connects a plurality of synthetic gasification plants with a fluid fuel power plant, and can also be connected with the existing liquid fuel pipe network to store and/or transport the liquid fuel produced by the synthetic gasification plants to the fluid fuel power plant and/or to other large users.

In the embodiment, the oxygen pipe network 32 is mutually communicated through oxygen pipelines (34, 34') and is connected with the synthesis gasification plant, the plant energy subsystem and the fluid fuel power plant, and O ₂ generated by the synthesis gasification plant is conveyed to an industrial kiln of the plant energy subsystem and the fluid fuel power plant for efficient combustion and CO ₂ capture; wherein the interior of the plant energy subsystem may be coupled by an internal O ₂ line or O ₂ pipe network.

In this embodiment, a plurality of fluid fuel power plants (5-1, 5-2, 5-3) are included, and the plurality of fluid fuel power plants (5-1, 5-2, 5-3) are CCPP, wherein the fluid fuel power plants (5-1, 5-2) exist in the plant energy subsystem (2-1, 2-2), and the fluid fuel power plants 5-3 exist in the industrial energy internet in this embodiment or are included in the power grid 1.

In specific operation, the plant energy subsystem 2-1 is taken as an example, and the plant energy subsystem 2-1 includes the industrial kiln 21-1 and the plasma energy apparatus 20-1, and the specific operation is the same as that of embodiment 1 or embodiment 2. The power grid 1 delivers electrical energy to the plant energy subsystem 2-1 and the synthetic gasification plant 3-1 via power lines (12, 12'); the plasma energy device 20-1 of the iron and steel plant of the plant energy subsystem 2-1 converts electric energy into plasma energy, the plasma energy converts CO ₂ into gas in the industrial kiln 21-1 (blast furnace in this embodiment), the gas is conveyed to the fluid fuel power plant 5-3 through the gas pipeline (45', 45) to generate electricity, and the generated electricity is conveyed to the power grid 1 through the power line 15 to form an energy closed loop. The fluid fuel power plant 5-1 transmits power into the power grid 1 through the power line 12', forming an energy closed loop; or the electrolytic water hydrogen production device in the synthetic gasification factory 3-1 uses electric energy to produce hydrogen, the hydrogen and coal gas produced by the industrial kiln 21-1 are synthesized into liquid fuel, the liquid fuel is transported to the fluid fuel power plant 5-3 through a liquid fuel transport line '(37, 37'), and the generated power is transported to the power grid 1 through the power line 15 to form an energy closed loop.

The plant energy subsystem 2-1 further includes a synthetic gasification plant 3-1, a gas pipe network 4-1, a fluid fuel power plant 5-1, and a carbon dioxide pipe network 23-1 included in the plant energy subsystem 2-1 of the present embodiment, and the specific operation is similar to that of the embodiment 1 or 2, wherein the gas pipe network 4-1 is used for storing and/or transporting gas or pure gas from the industrial kiln 21-1, and transporting gas to the synthetic gasification plant 3-1 for synthesizing liquid fuel, and the synthesized liquid fuel is transported to the liquid fuel pipe network 7; while the oxygen produced in the synthetic gasification plant 3-1 is transported to the oxygen piping network 32 and the independent fluid-fuel power plant 5-3. Furthermore, the gas pipe network 4-1 simultaneously supplies gas to the fluid fuel power plant 5-1 for combustion power generation. And the carbon dioxide pipe network 23-1 is respectively connected with the industrial kiln 21-1 and the fluid fuel power plant 5-1. The coupling and workflow of the plant energy subsystem 2-2 is identical to that of the plant energy subsystem 2-1 and will not be described in detail herein.

Further, in this embodiment, the synthesis gasification plant 3-0 independent from the industrial energy internet is powered by the independent power station 1-1, the oxygen generated by the synthesis gasification plant 3-1 is transported to the oxygen pipe network 32 for storage or use, and the synthesized liquid fuel is transported to the liquid fuel pipe network 7 for storage or use.

In this embodiment, the plant energy subsystem 2-3 is mainly other metallurgical, building material or chemical industry plants, and is powered by the power grid 1 through the power line 15; the gas used by the method is conveyed from a gas pipe network 4 through a gas pipeline 45; the CO ₂ produced by the method can also be conveyed to the carbon dioxide pipe network 23 through a CO ₂ pipeline.

In this embodiment, the fluid-fueled power plant 5-3, which is independent of the industrial energy internet, supplies power to the power grid 1 via the power line 15; the device is also respectively connected with a gas pipe network 4, a carbon dioxide pipe network 23 and an oxygen pipe network 32, specifically, the gas in the gas pipe network 4 and the oxygen in the oxygen pipe network 32 are used for combustion power generation, and discharged CO ₂ is conveyed into the carbon dioxide pipe network 23.

The carbon dioxide pipe network 23 in this embodiment can adjust the carbon dioxide treatment amount, or store carbon dioxide when the power supply is insufficient, and reconvert carbon dioxide when the power supply is rich.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An industrial energy internet, comprising:

A power network for providing electrical energy;

at least one plant energy subsystem comprising an industrial kiln and a plasma energy device, the plasma energy device utilizing electrical energy to generate plasma energy, the generated plasma energy being used to heat the industrial kiln and convert carbon dioxide to produce gas;

At least one fluid fuel network for storing and/or transporting fluid fuel, said fluid fuel comprising gas produced by said plant energy subsystem, gaseous and/or liquid fuel produced by said synthetic gasification plant;

And a fluid fuel power plant that generates power using the fluid fuel;

The plasma energy equipment and the water electrolysis hydrogen production device are used as adjustable loads of an electric power system to consume renewable energy power; the fluid fuel power plant is used for peak shaving and/or frequency modulation power generation of a power system in an action power grid.

2. The industrial energy internet of claim 1, wherein the power network capacity comprises greater than 30% of fluctuating renewable energy power stations.

3. The industrial energy internet of claim 2, wherein the renewable energy power station is a photovoltaic power station or a wind power station.

4. The industrial energy internet of claim 1, wherein the plant energy subsystem comprises at least one plant, the plant being a ferrous metallurgical plant and/or a cement plant, the ferrous metallurgical plant comprising a blast furnace and the cement plant comprising a cement kiln.

5. The industrial energy internet of claim 4, wherein the ferrous metallurgy plant comprises at least one blast furnace and a plasma energy device, the plasma energy device being mated with the blast furnace; the plasma energy equipment is used for providing energy required by the blast furnace for iron making and converting carbon dioxide generated by the blast furnace to obtain coal gas;

Preferably, the ferrous metallurgy factory further comprises a gas separator, wherein the gas separator is used for separating carbon dioxide in the gas discharged from the blast furnace to obtain pure gas.

6. The industrial energy internet of claim 4, wherein the cement plant comprises at least one cement kiln and a plasma energy device, the plasma energy device being mated with the cement kiln; the plasma energy equipment is used for providing energy required by the cement production process and converting carbon dioxide to obtain coal gas;

Preferably, the cement plant further comprises a gas separator, wherein the gas separator is used for separating carbon dioxide in the gas discharged from the cement kiln to obtain pure gas.

7. The industrial energy internet of claim 1 or 4, wherein the fluid-fuelled power plant is independently present in the industrial energy internet and/or included in the plant energy subsystem.

8. The industrial energy internet of claim 1 or 4, wherein the synthetic gasification plant is independently present in the industrial energy internet and/or included in the plant energy subsystem.

9. An industrial energy internet as described in claim 1 wherein said industrial energy internet further comprises an oxygen network for storing and/or transporting oxygen produced by said electrolyzed water hydrogen plant to said plant energy subsystem and/or a fluid fuel power plant.

10. The industrial energy internet of claim 1, further comprising a carbon dioxide network comprising a carbon dioxide storage package, the carbon dioxide network communicating with a plurality of the plant energy subsystems, and/or with a fluid fuel power plant, and/or with a CO ₂ permanent sequestration site.