A wind-solar-hydrogen co-fired power generation system

Abstract

This utility model discloses a wind-solar-hydrogen co-fired power generation system, relating to the field of energy technology. The system includes: a wind-solar power generation system connected to a hydrogen production system and an air separation unit; the hydrogen production system connected to a hydrogen storage system and a combustion-supporting system; the hydrogen storage system connected to an ammonia synthesis unit; the air separation unit connected to the ammonia synthesis unit and the combustion-supporting system; the ammonia synthesis unit connected to the coal-fired power generation system; and the coal-fired power generation system connected to the combustion-supporting system. The hydrogen production system converts electrical energy, which cannot be stored in large quantities, into hydrogen energy, which is relatively easy to store, reducing wind and solar power curtailment during off-peak periods.

Description

Technical Field

[0001] This utility model relates to the field of energy technology, and in particular to a wind-solar-hydrogen co-fired power generation system. Background Technology

[0002] The acquisition of new energy power generation is characterized by volatility, randomness, and intermittency. The shocks caused by new energy grid connection pose a significant threat to the safe and stable operation of the power system, and these shocks will be exacerbated with a high proportion of new energy connected to the grid. Furthermore, the rapid growth of new energy power generation capacity far exceeds the growth rate of total electricity consumption, creating considerable pressure on power absorption. Moreover, wind and solar resources and electricity load exhibit an inverse distribution.

[0003] Against the backdrop of the aforementioned new power system, the excessively high proportion of new energy power generation capacity has led to insufficient grid peak-shaving capacity and severe wind and solar curtailment during off-peak periods. Utility Model Content

[0004] The purpose of this invention is to provide a wind-solar-hydrogen coupled coal-fired power generation system, which aims to solve or improve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A wind-solar-hydrogen-coal-fired power generation system includes: a wind-solar power generation system, a coal-fired power generation system, a hydrogen production system, a hydrogen storage system, an air separation unit, an ammonia synthesis unit, and a combustion-supporting system;

[0007] The wind and solar power generation system is connected to the hydrogen production system and the air separation unit to supply power to the hydrogen production system and the air separation unit.

[0008] The hydrogen production system is connected to the hydrogen storage system and the combustion support system, and is used to supply hydrogen to the hydrogen storage system and oxygen to the combustion support system.

[0009] The hydrogen storage system is connected to the ammonia synthesis unit and is used to supply hydrogen to the ammonia synthesis unit;

[0010] The air separation unit is connected to the ammonia synthesis unit and the combustion-supporting system, and is used to supply nitrogen to the ammonia synthesis unit and oxygen to the combustion-supporting system;

[0011] The ammonia synthesis unit is connected to the coal-fired power generation system and is used to supply ammonia to the coal-fired power generation system for flue gas denitrification and boiler co-firing.

[0012] The coal-fired power generation system is connected to the combustion support system, which supplies carbon dioxide to the combustion support system, while the combustion support system supplies combustion-supporting gas to the coal-fired power generation system.

[0013] Furthermore, it also includes the distribution network, with wind and solar power generation systems and coal-fired power generation systems connected to the distribution network to supply power to it.

[0014] Furthermore, it also includes an electric heating system, with wind and solar power generation systems connected to the electric heating system to supply power to it.

[0015] Furthermore, it also includes hydrogen refueling stations, with hydrogen storage systems connected to the refueling stations to supply hydrogen gas.

[0016] Furthermore, it also includes a CCUS system, where the coal-fired power generation system is connected to the CCUS system to supply carbon dioxide and store excess carbon dioxide.

[0017] Furthermore, it also includes coal-fired heating systems, where coal-fired power generation systems are connected to coal-fired heating systems for heating purposes.

[0018] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0019] This utility model discloses a wind-solar-hydrogen-coal-fired power generation system. The system converts electrical energy, which cannot be stored in large quantities, into hydrogen energy, which is relatively easy to store, through a hydrogen production system, thereby reducing the curtailment of wind and solar power during off-peak periods.

[0020] By supplying power to the air separation unit, air is separated into nitrogen and oxygen. The oxygen is then mixed with oxygen produced by the hydrogen production system and fed into the coal-fired power generation system to aid combustion, thereby stabilizing the coal-fired power generation system under low load conditions and expanding its deep peak-shaving capacity.

[0021] The hydrogen produced by the hydrogen production system and the nitrogen separated by the air separation device are used to synthesize ammonia, which can be used as a reducing agent to remove nitrogen oxides produced by coal-fired power generation systems, and can also be used as agricultural fertilizer, thus improving the efficiency of resource recycling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a wind-solar-hydrogen-coal-fired power generation system according to the present invention. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The purpose of this invention is to provide a wind-solar-hydrogen-coal-fired power generation system, which aims to solve or improve at least one of the above-mentioned technical problems.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Glossary

[0028] CCUS stands for Carbon Capture, Utilization and Storage. This technology captures carbon dioxide from industrial emissions or the atmosphere and then utilizes or stores it to achieve permanent emission reductions, making it one of the key technologies for addressing climate change.

[0029] like Figure 1 As shown, this utility model provides a wind-solar-hydrogen production coupled coal-fired power generation system, including a power distribution network, a wind-solar power generation system, a coal-fired power generation system, an electric heating system, a hydrogen production system, a hydrogen storage system, an air separation device, an ammonia synthesis device, a combustion-supporting system, a CCUS system, and a coal-fired heating system;

[0030] The wind and solar power generation system and the coal-fired power generation system are respectively connected to the distribution network to supply power to the distribution network;

[0031] The wind and solar power generation system is connected to the electric heating system, hydrogen production system and air separation unit to supply power to the electric heating system, hydrogen production system and air separation unit;

[0032] The hydrogen production system is connected to the hydrogen storage system and the combustion support system, and is used to supply hydrogen to the hydrogen storage system and oxygen to the combustion support system.

[0033] The hydrogen storage system is connected to the hydrogen filling station and the ammonia synthesis unit, and is used to supply hydrogen to the hydrogen filling station and the ammonia synthesis unit;

[0034] The ammonia synthesis unit is connected to the coal-fired power generation system and is used to supply ammonia to the coal-fired power generation system for flue gas denitrification and boiler co-firing; the air separation unit is connected to the ammonia synthesis unit and the combustion-supporting system and is used to supply nitrogen to the ammonia synthesis unit and oxygen to the combustion-supporting system.

[0035] The coal-fired power generation system is connected to the combustion support system, which supplies carbon dioxide to the combustion support system, while the combustion support system supplies oxygen or carbon dioxide to the coal-fired power generation system for combustion support.

[0036] The coal-fired power generation system is connected to the CCUS system to supply carbon dioxide to the CCUS system and to store excess carbon dioxide.

[0037] The coal-fired power generation system is connected to the coal-fired heating system for heating purposes.

[0038] The execution flow of the above system is as follows:

[0039] Wind and solar power systems and coal-fired power systems supply power to the loads of the distribution network.

[0040] During periods of low load, surplus electricity from wind and solar power systems is supplied to electric heating systems, hydrogen production systems, and air separation units.

[0041] The hydrogen production system generates hydrogen and oxygen. The hydrogen is transported to the hydrogen storage system for storage, and the oxygen is transported to the combustion-supporting system.

[0042] The air separation unit generates oxygen and nitrogen. The nitrogen is sent to the ammonia synthesis unit, and the oxygen is sent to the combustion support system.

[0043] The hydrogen storage system delivers hydrogen to hydrogen filling stations and ammonia synthesis units.

[0044] The ammonia synthesis unit synthesizes hydrogen and nitrogen into ammonia water or liquid ammonia, which is then transported to the coal-fired power generation system for flue gas denitrification or boiler co-firing.

[0045] The carbon dioxide produced by the coal-fired power generation system is transported to the combustion support system. After being mixed with oxygen in the combustion support system, it enters the coal-fired power generation system for combustion, producing high-concentration carbon dioxide which is then sent to the CCUS system to achieve carbon dioxide capture and storage, while simultaneously providing heat for the coal-fired power generation system.

[0046] The combustion-supporting system delivers a mixture of carbon dioxide and oxygen to the coal combustion-supporting system for combustion support.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0048] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A wind-solar-hydrogen co-fired power generation system, characterized in that, This includes wind and solar power generation systems, coal-fired power generation systems, hydrogen production systems, hydrogen storage systems, air separation units, ammonia synthesis units, and combustion-supporting systems; The wind and solar power generation system is connected to the hydrogen production system and the air separation device, and is used to supply power to the hydrogen production system and the air separation device; The hydrogen production system is connected to the hydrogen storage system and the combustion-supporting system, and is used to supply hydrogen to the hydrogen storage system and oxygen to the combustion-supporting system. The hydrogen storage system is connected to the ammonia synthesis unit and is used to supply hydrogen to the ammonia synthesis unit; The air separation device is connected to the ammonia synthesis device and the combustion-supporting system, and is used to supply nitrogen to the ammonia synthesis device and oxygen to the combustion-supporting system; The ammonia synthesis unit is connected to the coal-fired power generation system and is used to supply ammonia to the coal-fired power generation system for flue gas denitrification and boiler co-firing. The denitrification system of the coal-fired power generation system is connected to the combustion-supporting system and is used to supply carbon dioxide to the combustion-supporting system, while the combustion-supporting system supplies combustion-supporting gas to the coal-fired power generation system.

2. The wind-solar-hydrogen co-fired power generation system according to claim 1, characterized in that, It also includes a power distribution network, with the wind and solar power generation system and the coal-fired power generation system respectively connected to the power distribution network for supplying power to the power distribution network.

3. The wind-solar-hydrogen co-fired power generation system according to claim 1, characterized in that, It also includes an electric heating system, wherein the wind and solar power generation system is connected to the electric heating system and is used to supply power to the electric heating system.

4. A wind-solar-hydrogen co-fired power generation system according to claim 1, characterized in that, It also includes a hydrogen refueling station, and the hydrogen storage system is connected to the hydrogen refueling station to supply hydrogen to the hydrogen refueling station.

5. A wind-solar-hydrogen co-fired power generation system according to claim 1, characterized in that, It also includes a CCUS system, which is connected to the coal-fired power generation system and is used to supply carbon dioxide to the CCUS system to store excess carbon dioxide.

6. A wind-solar-hydrogen co-fired power generation system according to claim 1, characterized in that, It also includes coal-fired heating systems, where coal-fired power generation systems are connected to coal-fired heating systems for heating purposes.

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