CN210385499U - Power generation and desulfurization integrated equipment for ship based on supercritical carbon dioxide - Google Patents

Power generation and desulfurization integrated equipment for ship based on supercritical carbon dioxide Download PDF

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CN210385499U
CN210385499U CN201920567888.5U CN201920567888U CN210385499U CN 210385499 U CN210385499 U CN 210385499U CN 201920567888 U CN201920567888 U CN 201920567888U CN 210385499 U CN210385499 U CN 210385499U
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carbon dioxide
supercritical carbon
storage tank
desulfurization
inlet
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陈恺祺
蒲文灏
宋张扬
岳晨
何纬峰
韩东
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E10/72Wind turbines with rotation axis in wind direction

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Abstract

The utility model discloses a based on marine electricity generation desulfurization integration equipment of supercritical carbon dioxide belongs to the new forms of energy and energy saving and emission reduction field. The equipment mainly comprises a supercritical carbon dioxide gas storage tank, a solid fuel (such as calcium oxide, magnesium oxide and the like) storage tank, a chemical reactor, a heat exchanger, a turbine, a carbon dioxide exhaust gas storage tank, a seawater reservoir and a desulfurizing tower. The method is characterized in that: the volume of a generator set in the ship is reduced by means of the supercritical characteristic and high energy storage density of the carbon dioxide; the solid fuel and the seawater can react and release a large amount of heat energy, so that the supercritical carbon dioxide is preheated to drive the turbine to do work; the product of the chemical reaction can also carry out desulfurization treatment on the diesel engine flue gas in a desulfurization tower; the compressor does not need to be operated all the time, and the power requirement can be met only by mounting the small wind power generation equipment on the ship. The system combines the power generation equipment and the desulfurization equipment in the ship together, reduces the emission of pollutants, and has good environmental protection and energy-saving effects.

Description

Power generation and desulfurization integrated equipment for ship based on supercritical carbon dioxide
Technical Field
The utility model discloses a based on marine electricity generation desulfurization integration equipment of supercritical carbon dioxide belongs to the new forms of energy and energy saving and emission reduction field.
Background
The existing power generation equipment and the flue gas desulfurization equipment of the ship are separated. The sources of power-on of the ship are: the generator and the crankshaft of the diesel engine are coaxially arranged, the rotation of the diesel engine is utilized to drive the rotor of the generator, the generator can output induced electromotive force by virtue of the electromagnetic induction principle, and current can be generated through a closed load loop. Therefore, the marine diesel engine needs to increase fuel consumption to ensure that additional work is input into the generator to generate power while maintaining the speed of the ship at a constant output power.
SOXThe large amount of the water is discharged, which causes ecological environment destruction and serious acid rain. In the exhaust gases of marine combustion engines, SO2And SO3The contents are 95% and 5%, respectively, and all result from the combustion of elemental sulfur in fossil fuels. According to the MARPOL convention, when the ship runs to an emission limit value area, SO is required to be convertedXThe discharge is reduced to a certain requirement, otherwise the region is prohibited from entering for operation. The existing flue gas desulfurization can be divided into wet flue gas desulfurization, dry flue gas desulfurization and semi-dry flue gas desulfurizationThree processes of flue gas desulfurization.
The carbon dioxide is non-toxic, has good physical and chemical properties, has a proportion of 0.3% in air, has a low critical temperature of Tc 31.1 deg.C and a moderate critical pressure of 7.38 x 106Pa. When the carbon dioxide is in a supercritical state, the carbon dioxide has the dual characteristics of gas and liquid, the density is similar to that of liquid (about 200-800 times of air density), the viscosity and the diffusion coefficient are close to those of gas (about 100 times of liquid), and the carbon dioxide has better fluidity and transmission characteristics. Furthermore, its energy storage density is about 2 times that of air compared to air of the same parameters.
Wind power generation has the characteristics of intermittence, volatility and the like, has the defects of difficult access, difficult control and the like when power generation is connected into a network, and can generate adverse effects on the quality and the reliability of electric energy input into an electric appliance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a based on marine electricity generation desulfurization integration equipment of supercritical carbon dioxide. By utilizing the advantages that the supercritical carbon dioxide has large energy storage potential, the metal oxide and water can release large amount of heat in reaction, the reaction product can realize wet flue gas desulfurization and the like, the power generation and desulfurization equipment in the ship is integrated, the volume of necessary equipment in the ship is reduced, and the oil consumption of a diesel engine is saved. Meanwhile, the intermittent and fluctuating property of the wind power generation can be easily coped with, and the wind power generation device is very environment-friendly.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a based on marine power generation desulfurization integration equipment of supercritical carbon dioxide which characterized in that: the system comprises a supercritical carbon dioxide power generation unit, a chemical reaction working medium supply unit, a flue gas desulfurization unit and a wind power generation compression unit; the supercritical carbon dioxide power generation unit comprises a supercritical carbon dioxide gas storage tank, a heat exchanger, a turbine, a power generator and a carbon dioxide exhaust storage tank; the gas outlet of the supercritical carbon dioxide gas storage tank is communicated with the inlet of the heat exchanger through an electric switch valve of a supercritical carbon dioxide gas supply section; the outlet of the heat exchanger is communicated with the inlet of the turbine through a pipeline; the outlet of the turbine is connected with a carbon dioxide exhaust storage tank, so that the aim of recycling the working medium is fulfilled; the turbine is connected with the generator through a bearing to driveIt operates to supply power to the electrical equipment of the ship; the chemical reaction working medium supply unit comprises a solid fuel storage tank, a seawater reservoir and a chemical reactor; the heat exchanger is embedded in the chemical reactor; the upper part of the chemical reactor comprises a solid fuel inlet and a seawater inlet, and the bottom of the chemical reactor is provided with a desulfurization liquid discharge port; the outlet of the solid fuel storage tank is connected with the solid fuel inlet of the chemical reactor through a fuel supply section electric switch valve and a fuel supply section check valve arranged on a connecting pipeline of the solid fuel storage tank, and provides a solid reactant for chemical reaction; the water outlet of the seawater reservoir is connected with the seawater inlet at the upper right side of the chemical reactor through a water supply section electric switch valve, a water supply section water pump and a water supply section check valve in sequence to provide a liquid reactant for chemical reaction; the flue gas desulfurization unit comprises the chemical reactor, a flue gas regenerator, a desulfurization tower and a spray tower; the flue gas heat regenerator is arranged on a pipeline communicated with the outlet of the heat exchanger and the inlet of the turbine; the flue gas regenerator is provided with four ports, wherein the top port is a supercritical carbon dioxide inlet, the bottom port is a supercritical carbon dioxide outlet, the right port is a high-temperature diesel engine flue gas inlet, and the left port is a low-temperature diesel engine flue gas outlet; the top port is connected with the outlet of the heat exchanger through a pipeline, the bottom port is communicated with the inlet of the turbine through a pipeline, and the right port is communicated with the tail gas discharge port of the diesel engine through a pipeline; the spraying is positioned at the upper part of the desulfurizing tower; a flue gas shunting and discharging pipeline is arranged at the bottom of the desulfurization tower, is connected with a left port of the flue gas heat regenerator through a pipeline, and sends the flue gas to be treated into the tower; in the flue gas heat regenerator, the tail gas of the diesel engine flue gas transfers heat to preheated supercritical carbon dioxide in a countercurrent heat exchange mode, and a working medium is heated for the second time and then a turbine is pushed to do work to generate electricity; the chemical reactor sequentially passes through the electric switch valve of the desulfurization liquid supply section, the water pump of the desulfurization liquid supply section and the check valve of the desulfurization liquid supply section, is connected with the spray, and sprays the desulfurization liquid into the tower to absorb SO in the flue gasx(ii) a The wind power generation compression unit comprises the supercritical carbon dioxide gas storage tank, the carbon dioxide exhaust gas storage tank and a compressor. The outlet of the compressor is connected with a supercritical carbon dioxide gas storage tank through an electric switch valve of a supercritical carbon dioxide gas storage section arranged on a connecting pipeline; carbon dioxide exhaust gas storageThe tank is communicated with the inlet of the compressor through an electric switch valve of the air inlet section of the compressor.
The power generation and desulfurization integrated equipment for the supercritical carbon dioxide ship is characterized in that a chemical reactor utilizes solid fuel (such as calcium oxide, magnesium oxide and the like) to react with seawater and release a large amount of heat, the heat is transmitted into a heat exchanger and then transmitted to working medium flowing from a supercritical carbon dioxide gas storage tank through an internal coil pipe to preheat the working medium.
The power generation and desulfurization integrated equipment for the supercritical carbon dioxide ship is characterized in that the compressor is driven by a small-sized wind driven generator on the ship. The wind driven generator converts the intermittent and fluctuating clean and renewable energy (wind energy) into electric energy to compress the recovered working medium, thereby realizing the purpose of recycling
The method for the marine power generation and desulfurization integrated equipment based on the supercritical carbon dioxide is characterized by comprising the following steps of: at the initial stage of starting the equipment, opening an electric switch valve of a supercritical carbon dioxide gas supply section, an electric switch valve of a fuel supply section, an electric switch valve of a water supply section and a water pump of the water supply section, wherein solid fuel in a solid fuel storage tank flows through a check valve of the fuel supply section and then enters a chemical reactor, and the solid fuel and seawater from a seawater reservoir through a check valve of the water supply section are subjected to exothermic reaction. And the supercritical carbon dioxide working medium flows out of the supercritical carbon dioxide gas storage tank corresponding to the opened electric switch valve, enters a coil pipe in the heat exchanger and absorbs heat to preheat. After the reaction is stable, the electric switch valve of the desulfurization liquid supply section is opened, and under the action of the water pump of the desulfurization liquid supply section, chemical reaction products pass through the check valve of the desulfurization liquid supply section and are sprayed out from the spray in the desulfurization tower to desulfurize the smoke of the diesel engine. The flue gas enters the tube bundle in the heat regenerator from the port at the right side of the flue gas heat regenerator, releases heat to the supercritical carbon dioxide flowing in from the port at the top of the flue gas heat regenerator in a counter-current mode, then flows out from the port at the left side, is discharged into the desulfurizing tower after being shunted by a pipeline, fully contacts with the desulfurizing liquid sprayed and sprayed, reacts, and absorbs SOxAnd finally discharged to the atmosphere. Absorption of SOxThe latter is hardly soluble in the liquidThe solid product of the body, along with excess liquid, is stored in the bottom of the desulfurization column as a liquid-solid mixture. And the secondarily heated supercritical carbon dioxide flows out from the bottom port of the flue gas heat regenerator, enters the turbine, pushes the turbine to do work, drives the generator to generate power through the bearing, discharges the gas after doing work into the carbon dioxide exhaust storage tank, closes the corresponding electric switch valve of the supercritical carbon dioxide gas supply section when the gas in one supercritical carbon dioxide gas storage tank is used up, opens the other electric switch valve of the supercritical carbon dioxide gas supply section, and allows the system to continue to maintain operation. When the wind power at the position of the ship is stable and the wind speed is enough to generate power, the electric switch valve of the air inlet section of the compressor and the electric switch valve of the supercritical carbon dioxide air storage section corresponding to the air storage tank are opened, the compressor is driven by the small-sized wind driven generator to compress the gas flowing out of the carbon dioxide exhaust storage tank and store the gas back to the air storage tank, and the cyclic utilization is realized.
Drawings
FIG. 1 is a system diagram of a power generation and desulfurization integrated equipment for a ship based on supercritical carbon dioxide;
number designation in the figures: 1-supercritical carbon dioxide gas storage tank; 2-electric switch valve of supercritical carbon dioxide gas supply section; 3-a heat exchanger; 4-a chemical reactor; 5-a flue gas heat regenerator; 6-a turbine; 7-a generator; 8-a carbon dioxide vent gas storage tank; 9-a solid fuel storage tank; 10-fuel supply section electric on-off valve; 11-fuel supply section check valve; 12-a seawater reservoir; 13-electric switch valve of water supply section; 14-water supply section water pump; 15-water supply section check valve; 16-electric switch valve of desulfurization liquid supply section; 17-a desulfurization liquid supply section water pump; 18-a desulfurization liquid supply section check valve; 19-a desulfurization tower; 20-spraying; 21-electric switch valve of air inlet section of compressor; 22-a compressor; 23-supercritical carbon dioxide gas storage section electric switch valve
Detailed Description
Fig. 1 is a power generation and desulfurization integrated device for a ship based on supercritical carbon dioxide, and the working process of the device is described with reference to fig. 1.
At the initial stage of starting the equipment, opening an electric switch valve 2 of a supercritical carbon dioxide gas supply section, an electric switch valve 10 of a fuel supply section, an electric switch valve 13 of a water supply section and a water pump 14 of the water supply section, enabling solid fuel in a solid fuel storage tank 9 to flow through a check valve 11 of the fuel supply section and then enter a chemical reactor 4, and enabling the solid fuel to perform exothermic reaction with seawater from a seawater reservoir 12 through a check valve 15 of the water supply section. And the supercritical carbon dioxide working medium flows out of the supercritical carbon dioxide gas storage tank 1 corresponding to the opened electric switch valve, enters a coil pipe inside the heat exchanger 3, and absorbs heat to preheat.
After the reaction is stable, the electric switch valve 16 of the desulfurization liquid supply section is opened, and under the action of the water pump 17 of the desulfurization liquid supply section, chemical reaction products pass through the check valve 18 of the desulfurization liquid supply section and are sprayed out from the spray 20 in the desulfurization tower 19, so that the diesel engine flue gas is desulfurized. The flue gas enters the tube bundle in the regenerator from the right port of the flue gas regenerator 5, releases heat to the supercritical carbon dioxide flowing in from the top port of the flue gas regenerator 5 in a counter-current mode, then flows out from the left port, is discharged into the desulfurizing tower 19 after being shunted by a pipeline, fully contacts with the desulfurizing liquid sprayed out from the spray 20, reacts to absorb SOxAnd finally discharged to the atmosphere. Absorption of SOxThe latter solid product, which is hardly soluble in liquid, is stored in the bottom of the desulfurization tower 19 as a liquid-solid mixture with an excess of liquid.
The supercritical carbon dioxide after secondary heating flows out from the bottom port of the flue gas heat regenerator 5, enters the turbine 6, pushes the turbine to do work, drives the generator 7 to generate electricity through the bearing, and the gas after the work is discharged into a carbon dioxide exhaust storage tank 8. When the gas in one supercritical carbon dioxide gas storage tank 1 is used up, the corresponding supercritical carbon dioxide gas supply section electric switch valve 2 is closed, and the other supercritical carbon dioxide gas supply section electric switch valve 2 is opened, so that the system continues to maintain operation.
When the wind power at the position of the ship is stable and the wind speed is enough to generate power, the electric switch valve 21 at the air inlet section of the compressor and the electric switch valve 23 at the supercritical carbon dioxide air storage section corresponding to the air storage tank are opened, and the compressor 22 is driven by the small-sized wind driven generator to compress the gas flowing out of the carbon dioxide exhaust storage tank 9 and store the gas back to the air storage tank, so that the cyclic utilization is realized.

Claims (2)

1. The utility model provides a based on marine power generation desulfurization integration equipment of supercritical carbon dioxide which characterized in that: the system comprises a supercritical carbon dioxide power generation unit, a chemical reaction working medium supply unit, a flue gas desulfurization unit and a wind power generation compression unit;
the supercritical carbon dioxide power generation unit comprises a supercritical carbon dioxide gas storage tank (1), a heat exchanger (3), a turbine (6), a power generator (7) and a carbon dioxide exhaust storage tank (8); the air outlet of the supercritical carbon dioxide air storage tank (1) is communicated with the inlet of the heat exchanger (3) through an electric switch valve (2) of a supercritical carbon dioxide air supply section; the outlet of the heat exchanger (3) is communicated with the inlet of the turbine (6) through a pipeline; the outlet of the turbine (6) is connected with a carbon dioxide exhaust storage tank (8); the turbine (6) is connected with the generator (7) through a bearing;
the chemical reaction working medium supply unit comprises a solid fuel storage tank (9), a seawater reservoir (12) and a chemical reactor (4); the heat exchanger (3) is embedded in the chemical reactor (4); the upper part of the chemical reactor (4) comprises a solid fuel inlet and a seawater inlet, and the bottom of the chemical reactor is provided with a desulfurization liquid discharge port; the outlet of the solid fuel storage tank (9) is connected with the solid fuel inlet of the chemical reactor (4) through a fuel supply section electric switch valve (10) and a fuel supply section check valve (11) which are arranged on the connecting pipeline of the solid fuel storage tank; a water outlet of the seawater reservoir (12) is connected with a seawater inlet at the upper right side of the chemical reactor (4) through a water supply section electric switch valve (13), a water supply section water pump (14) and a water supply section check valve (15) in sequence;
the flue gas desulfurization unit comprises the chemical reactor (4), a flue gas regenerator (5), a desulfurization tower (19) and a spray (20); the flue gas heat regenerator (5) is arranged on a pipeline communicated with the outlet of the heat exchanger (3) and the inlet of the turbine (6); the flue gas regenerator (5) is provided with four ports, the top port is a supercritical carbon dioxide inlet, the bottom port is a supercritical carbon dioxide outlet, the right port is a high-temperature diesel engine flue gas inlet, and the left port is a low-temperature diesel engine flue gas outlet; the top port is connected with the outlet of the heat exchanger (3) through a pipeline, the bottom port is communicated with the inlet of the turbine (6) through a pipeline, and the right port is communicated with the tail gas discharge port of the diesel engine through a pipeline; the spray (20) is positioned at the upper part of the desulfurizing tower (19); a flue gas split-flow discharge pipeline is arranged at the bottom of the desulfurizing tower (19) and is connected with the left port of the flue gas heat regenerator (5) through a pipeline; the chemical reactor (4) is connected with a spray (20) after sequentially passing through a desulfurization liquid supply section electric switch valve (16), a desulfurization liquid supply section water pump (17) and a desulfurization liquid supply section check valve (18);
the wind power generation compression unit comprises the supercritical carbon dioxide gas storage tank (1), the carbon dioxide exhaust gas storage tank (8) and a compressor (22); the outlet of the compressor (22) is connected with the supercritical carbon dioxide gas storage tank (1) through a supercritical carbon dioxide gas storage section electric switch valve (23) arranged on a connecting pipeline; the carbon dioxide exhaust storage tank (8) is communicated with the inlet of the compressor (22) through an electric switch valve (21) of the air inlet section of the compressor.
2. The integrated power generation and desulfurization equipment for ships based on supercritical carbon dioxide as claimed in claim 1, wherein the compressor (22) is driven by a small-sized wind power generator on the ship.
CN201920567888.5U 2019-04-24 2019-04-24 Power generation and desulfurization integrated equipment for ship based on supercritical carbon dioxide Active CN210385499U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110064303A (en) * 2019-04-24 2019-07-30 南京航空航天大学 Based on the supercritical carbon dioxide desulfurization integrated device and method of power generation peculiar to vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110064303A (en) * 2019-04-24 2019-07-30 南京航空航天大学 Based on the supercritical carbon dioxide desulfurization integrated device and method of power generation peculiar to vessel

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