CN217149333U - Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine - Google Patents

Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine Download PDF

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CN217149333U
CN217149333U CN202220735538.7U CN202220735538U CN217149333U CN 217149333 U CN217149333 U CN 217149333U CN 202220735538 U CN202220735538 U CN 202220735538U CN 217149333 U CN217149333 U CN 217149333U
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storage tank
unit
coal
outlet
green
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刘学军
常姣姣
孙予罕
高峰
鲁锋
王慧
范卫尧
袁瑞山
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Shaanxi Provincial Government Investment Evaluation Center
Shanghai Lanze Energy Technology Co ltd
Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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Shaanxi Provincial Government Investment Evaluation Center
Shanghai Lanze Energy Technology Co ltd
Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02P20/133—Renewable energy sources, e.g. sunlight

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Abstract

The utility model discloses a coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine, the system includes new forms of energy power generation system, booster station, electrolysis hydrogen generation station, current coal electric unit, CO 2 Capture unit, CO 2 A storage tank, a methanol synthesis unit and a methanol storage tank; an electrolytic cell is arranged in the electrolytic hydrogen production station, a gas outlet of the electrolytic cell is respectively provided with a green oxygen storage tank and a green hydrogen storage tank, and an outlet of the green hydrogen storage tank is connected with a methanol synthesis unit; CO2 2 The collecting unit is connected with the clean flue of the existing coal-electric machine set, and CO 2 CO is arranged at the outlet of the trapping unit 2 Storage tank, CO 2 The outlet of the storage tank is connected with a methanol synthesis unit; the electric power for producing hydrogen by electrolyzing water is completely from a new energy power generation system, so that the generated H 2 And O 2 Completely green, and a large amount of green oxygen is used for chemical engineering projects, so that the oxygen power consumption of an air separation system can be reduced, the consumption of ash electricity is reduced, the carbon reduction effect is further realized, and CO is captured by the carbon capture unit 2 Realizes low carbonization of the coal-electricity unit, and the synthesized green methanol realizes CO 2 And (5) resource utilization.

Description

Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine
Technical Field
The utility model belongs to the technical field of the electricity generation, concretely relates to coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine.
Background
The output characteristics of the wind power and photovoltaic power generation system are always in dynamic change along with the change of wind speed and illumination conditions, but the load demand of a user side is generally relatively stable, so that the output characteristic curves of the power generation side and the user side are not matched along with the large-scale access of new energy to a power system, and the safety and the stability of a power grid system are further influenced. The coal-electricity unit is used as a high-quality and stable peak regulation resource and is a key factor for promoting the consumption of new energy. However, a high proportion of coal electricity will in turn lead to a large amount of CO 2 Emissions, the relevant data indicate: china's power system CO 2 The emission accounts for more than 40 percent of the total national emission and is the largest domestic CO 2 And (4) discharging the materials.
Many chemical engineering projects or gas turbine unit need set up air separation system, obtain pure oxygen, increase power consumption.
Therefore, the CO of the coal electric unit is reduced by adopting a carbon reduction measure 2 And on the premise of realizing the carbon peak-reaching carbon neutralization target, the emission of the coal-electricity unit is of great significance to new energy consumption and improvement of the safety of a power grid while maintaining the proper scale.
Based on the reason, the utility model discloses on the basis of the low carbon technology of the abundant research coal electricity, provide a low carbon technology of coal electricity based on liquid sunshine.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a coal electric unit subtracts carbon system based on liquid sunshine technique not only helps solving the difficult problem of coal electric low carbon development, can promote the new forms of energy to consume moreover, has important meaning to realizing the double-carbon target.
In order to realize the purpose, the utility model discloses a technical scheme is: a coal electric machine set carbon reduction system based on new energy and liquid sunlight comprises a new energy power generation system, a booster station, an electrolysis hydrogen production station, an existing coal electric machine set and CO 2 Capture unit, CO 2 A storage tank, a methanol synthesis unit and a methanol storage tank; an electrolytic cell is arranged in the electrolytic hydrogen production station, a green oxygen storage tank and a green hydrogen storage tank are respectively arranged at a gas outlet of the electrolytic cell, and the green hydrogen storage tankThe outlet of the methanol synthesis unit is connected with a methanol synthesis unit; CO2 2 The collecting unit is connected with the clean flue of the existing coal-electric machine set, and CO 2 CO is arranged at the outlet of the trapping unit 2 Storage tank, CO 2 The outlet of the storage tank is connected with a methanol synthesis unit; the methanol synthesis unit is connected with a methanol storage tank; the outlet of the green oxygen storage tank is connected with an air separation system of an industrial user.
The pipeline from the outlet of the green hydrogen storage tank to the methanol synthesis unit is provided with H 2 Compressor, CO 2 CO is arranged on a pipeline from the outlet of the storage tank 10 to the methanol synthesis unit 2 A compressor.
CO 2 An induced draft fan is arranged at the inlet of the trapping unit.
The new energy power generation system is a wind power generation system, a solar power generation system, a tidal power generation system and/or a biomass power generation system.
The outlet of the methanol storage tank is provided with a methanol purification unit.
The booster station is connected with the hydrogen generation station through a special line or a power grid.
CO 2 The trapping unit adopts a physical adsorption system.
A pressure stabilizing valve is arranged at a hydrogen outlet of the electrolytic cell.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the electric power for producing hydrogen by electrolyzing water is completely from a new energy power generation system, and the generated H 2 And O 2 Is completely green; through the system, can also increase consumption of new forms of energy electric power
(2) When the green oxygen is used in a chemical project, the oxygen power consumption of an air separation system can be reduced, the consumption of ash electricity is reduced, and the carbon reduction effect is achieved;
(3) CO capture by carbon capture unit 2 The low carbonization of the coal-electric machine set is facilitated;
(4) based on the methanol synthesis unit, green methanol can be synthesized to realize CO 2 Resource utilization, the synthesized methanol is applied to the fields of chemical industry, traffic, electric power and the like to replace gray methanol, and the low-carbon development of the chemical industry, the traffic, the electric power and the like is realized.
Drawings
FIG. 1 is a schematic diagram of a liquid sunlight-based carbon reduction system of a coal-electric machine set.
The reference numbers in the figures mean: 1-a new energy power generation system; 2-a booster station; 3-an electrolytic cell; 4-a green oxygen storage tank; 5-a green hydrogen storage tank; 6-a coal electric boiler; 7-a draught fan; 8-a chimney; 9-CO 2 A trapping unit; 10-CO 2 A storage tank; 11-CO 2 A compressor; 12-H 2 A compressor; 13-a methanol synthesis unit; 14-a methanol storage tank; 15-methanol purification unit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the parts related to the present invention are shown in the drawings.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict. The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples will be understood as providing exemplary features of various details of some ways in which the technical concepts of the present invention may be practiced. Thus, unless otherwise indicated, the features of the various embodiments/examples may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present invention.
As shown in figure 1, the coal electric machine set carbon reduction system based on new energy and liquid sunlight comprises a new energy power generation system 1, a booster station 2, an electrolysis hydrogen production station, an existing coal electric machine set and CO 2 Capture Unit 9, CO 2 A storage tank 10, a methanol synthesis unit 13, a methanol storage tank 14, and a methanol purification unit 15; an electrolytic cell 3 is arranged in the electrolytic hydrogen production station, a gas outlet of the electrolytic cell 3 is respectively provided with a green oxygen storage tank 4 and a green hydrogen storage tank 5, and an outlet of the green hydrogen storage tank 5 is connected with a methanol synthesis unit 13; CO2 2 The trapping unit 9 is connected with the existing coal powerClean flue of the unit, CO 2 CO is provided at the outlet of the trap unit 9 2 Storage tank 10, CO 2 The outlet of the storage tank 10 is connected with a methanol synthesis unit 13; h is arranged on a pipeline from the outlet of the green hydrogen storage tank 5 to the methanol synthesis unit 13 2 Compressor 12, CO 2 CO is arranged on a pipeline from the outlet of the storage tank 10 to the methanol synthesis unit 13 2 A compressor 11; the outlet of the green oxygen storage tank 4 is connected with the oxygen side of an air separation system of an industrial user; the green oxygen is used for chemical engineering projects, so that the oxygen production ash electricity consumption of an air separation system can be reduced, and the carbon reduction effect is further realized.
In actual production, more wind power generation systems and photovoltaic power generation systems are used as power supplies, collected on the low-voltage side of the booster station through a collecting line, and conveyed to the electrolytic hydrogen production station through a special line or a power grid after boosting. Green hydrogen and green oxygen are respectively obtained through an electrolytic cell 3 of an electrolytic hydrogen production station, and the green oxygen generated by an anode is conveyed to a green oxygen storage tank 4 through a pipeline and further conveyed to an industrial user for replacing gray oxygen generated by an air separation system; the green hydrogen generated by the cathode is conveyed to a green hydrogen storage tank 5 through a pipeline and is used as a raw material for synthesizing the methanol. The hydrogen green tank 5 here serves for storage and pressure stabilization. The flue gas led from the outlet of the 6-furnace desulfurization absorption tower of the flue gas coal electric boiler is collected by carbon and then returns to a chimney to be discharged to the atmosphere, thereby reducing CO of a coal electric unit 2 Emission of CO 2 CO captured by the capture unit 9 2 Is transported to CO through a pipeline 2 Storage tank 10, here CO 2 The function of the tank 10 is the same as that of the green oxygen tank.
CO 2 The trapping unit adopts a physical adsorption system, and the heat source of the physical adsorption system can be from the power generation of a coal-electric machine set or the low-quality steam of the coal-electric machine set.
The hydrogen outlet of the electrolytic cell is provided with a pressure stabilizing valve to ensure the safe operation and stable output of the electrolytic cell.
H from Green Hydrogen tank 5 2 And from CO 2 CO of tank 10 2 Respectively pressurized by a compressor according to a set proportion and then conveyed to a methanol synthesis unit 13 to synthesize CH 3 OH, crude methanol obtained after synthesis is stored in a methanol storage tank 14, and finally is purified by a methanol purification unit 15 and then is conveyed to a user to replace gray produced by coal powerAnd the methanol realizes low carbonization of the coal-electric machine set and the coupling industry.
The traditional coal electric unit obtains high-temperature and high-pressure steam by burning coal and drives a steam turbine generator unit to obtain electric energy. A large amount of CO is generated in the process of burning coal in a boiler 2 Large amount of CO 2 The greenhouse effect generated by the emission into the atmosphere seriously affects the living environment.
Referring to fig. 1, the present invention is directed to a method for reducing CO in a coal-electric machine set 2 The emission carbon reduction system drives related industries to reduce carbon through coupling with other industries, so that CO is reduced 2 Resource utilization, wherein the system comprises a green hydrogen subsystem and CO 2 A capture subsystem and a synthetic methanol subsystem; the green hydrogen subsystem comprises a new energy power generation system 1, a booster station 2 and an electrolytic cell 3; CO2 2 The capture subsystem comprises a coal-electric boiler 6 and a CO2 capture unit 9, and the synthetic methanol subsystem comprises a methanol synthesis unit 13, a methanol storage tank 14 and a methanol purification unit 15; a gas outlet of the electrolytic cell 3 is respectively provided with a green oxygen storage tank 4 and a green hydrogen storage tank 5, and an outlet of the green hydrogen storage tank 5 is connected with a methanol synthesis unit 13; CO2 2 The collecting unit 9 is connected with the clean flue of the existing coal-electric machine set, CO 2 CO is provided at the outlet of the trap unit 9 2 Storage tank 10, CO 2 The outlet of the storage tank 10 is connected with a methanol synthesis unit 13; the methanol synthesis unit 13 is connected with a methanol storage tank 14;
the specific working process is as follows: green electric energy generated by a new energy power generation system 1 composed of photovoltaic and wind power is collected at the low-voltage side of the booster station 2 through a low-voltage collecting line, and the green power boosted by the booster station 2 is transmitted to a hydrogen generation station through a special line or a power grid. Converting electric energy into green hydrogen and green oxygen through an electrolytic bath 3 of a hydrogen production station, storing the green oxygen generated at the anode in a green oxygen storage tank 4, and conveying the green oxygen to a chemical plant by a pipeline or a tank truck for replacing part of ash oxygen of an air separation system; hydrogen gas generated at the cathode is stored in the hydrogen green tank 5. Derived from CO 2 CO of tank 10 2 And hydrogen from the green hydrogen storage tank 5 passes through CO respectively according to a set proportion 2 Compressor 11 and H 2 The pressurized methanol enters a methanol synthesis unit 13 after being pressurized by a compressor 12, crude methanol is generated in the methanol synthesis unit 13 under the action of a catalyst, and the crude methanol is conveyed into the methanol synthesis unit 13 through a pipelineIn the methanol storage tank 14, the methanol enters the methanol purification unit 15 for purification to obtain refined methanol, and at the moment, the system finishes a process.

Claims (8)

1. A coal electric machine set carbon reduction system based on new energy and liquid sunlight is characterized by comprising a new energy power generation system (1), a booster station (2), an electrolysis hydrogen generation station, an existing coal electric machine set and CO 2 A capture unit (9), CO 2 A storage tank (10), a methanol synthesis unit (13) and a methanol storage tank (14); an electrolytic cell (3) is arranged in the electrolytic hydrogen production station, a gas outlet of the electrolytic cell (3) is respectively provided with a green oxygen storage tank (4) and a green hydrogen storage tank (5), and an outlet of the green hydrogen storage tank (5) is connected with a methanol synthesis unit (13); CO2 2 The gathering unit (9) is connected with the flue and CO behind the desulfurization island of the existing coal-electric machine set 2 CO is arranged at the outlet of the trapping unit (9) 2 Storage tank (10), CO 2 The outlet of the storage tank (10) is connected with a methanol synthesis unit (13); the methanol synthesis unit (13) is connected with a methanol storage tank (14); the outlet of the green oxygen storage tank (4) is connected with the oxygen side of an air separation system of an industrial user.
2. The coal-electric unit carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, wherein H is arranged on a pipeline from an outlet of the green hydrogen storage tank (5) to the methanol synthesis unit (13) 2 Compressor (12), CO 2 CO is arranged on a pipeline from the outlet of the storage tank (10) to the methanol synthesis unit (13) 2 A compressor (11).
3. The coal-electric machine set carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, wherein CO is selected from the group consisting of CO, CO and CO 2 The inlet of the trapping unit (9) is arranged at the downstream of the induced draft fan (7).
4. The coal-electric machine set carbon reduction system based on new energy and liquid sunlight as claimed in claim 1 is characterized in that the new energy power generation system (1) is a wind power generation system, a solar power generation system, a tidal power generation system and/or a biomass power generation system.
5. The coal-electric machine set carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, characterized in that the outlet of the methanol storage tank (14) is provided with a methanol purification unit (15).
6. The coal-electric unit carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, characterized in that the booster station (2) is connected to the hydrogen generation station through a dedicated line or a power grid.
7. The coal-electric machine set carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, wherein CO is selected from the group consisting of CO, CO and CO 2 The trapping unit (9) adopts a physical adsorption system.
8. The coal-electric machine set carbon reduction system based on new energy and liquid sunlight as claimed in claim 1, characterized in that a pressure stabilizing valve is arranged at a hydrogen outlet of the electrolytic cell (3).
CN202220735538.7U 2022-03-29 2022-03-29 Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine Active CN217149333U (en)

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Application Number Priority Date Filing Date Title
CN202220735538.7U CN217149333U (en) 2022-03-29 2022-03-29 Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220735538.7U CN217149333U (en) 2022-03-29 2022-03-29 Coal electric unit subtracts carbon system based on new forms of energy and liquid sunshine

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