CN114352366A - Compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system of thermal power plant - Google Patents

Abstract

The invention discloses a compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system in a thermal power plant, comprising a low-pressure compressor, a high-pressure compressor, a solid particle heat storage system, a lava heat storage system, a low-pressure compressor and a high-pressure compressor It is driven by the motor or driven by the steam turbine. When the electricity load of the power grid is small or the power plant has surplus electricity, the excess electricity drives the low-pressure compressor and the high-pressure compressor to compress the air sucked from the atmosphere; The lava heat storage system and the solid particle heat storage system store the heat of the compression process. The invention solves the problems of low energy storage efficiency of the existing compressed air and large loss of exhaust residual energy, effectively utilizes the internal energy of the exhaust gas, increases the carbon dioxide concentration in the exhaust gas, and effectively reduces the carbon capture operation cost.

Description

A thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system

technical field

The invention relates to the field of thermal power generation, and more particularly, to a thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system.

Background technique

New energy power represented by wind power and solar power has the characteristics of instability and volatility. When large-scale grid connection, it will cause a certain impact on the power grid, and put forward higher requirements for the peak shaving and valley filling, safety and stability adjustment of the power grid. requirements. In my country's current power structure, thermal power still occupies a large proportion. In the context of the rapid development of new energy power in the next ten years, further excavation of the flexibility of thermal power plants and flexible peak regulation through energy storage and other methods can make up for new energy power. Inadequate balance of power supply fluctuations. From the electricity consumption side, the electricity load will also have peaks and troughs during the day, forming a mismatch with the power generation side. The development of combined peak shaving with fire and storage can also obtain high electricity prices. The development of thermal power plus energy storage is not only beneficial to grid dispatching, but also can improve the income of power generation enterprises, so it has great development potential.

Among the national carbon dioxide emissions, energy production and conversion account for 47%, of which thermal power generation is the main source of carbon emissions from energy conversion. The development of CCUS in thermal power plants is one of the ways to reduce carbon emissions. However, the operating cost of carbon capture is highly correlated with the concentration of carbon dioxide in the flue gas. Increasing the concentration of carbon dioxide can reduce the cost of carbon capture. Oxygen-enriched combustion can effectively increase the concentration of carbon dioxide in the flue gas and reduce the cost of carbon capture. After the compressed air is cryogenically cooled, the oxygen and nitrogen are separated, which can realize the functions of energy storage and oxygen-enriched combustion at the same time.

At present, the widely used energy storage methods mainly include: electrochemical energy storage, pumped hydro energy storage, compressed air energy storage, etc. Electrochemical energy storage has high efficiency, fast start-up speed, and short construction period, but high price, small capacity, poor consistency after battery grouping, short cycle life, and large battery manufacturing pollution. It is currently in the early stage of development. Pumped storage is the earliest energy storage method developed on a large scale. It has mature technology and low cost. It is suitable for large-scale energy storage, but is limited by geographical conditions. Compressed air energy storage has low cost and long service life, and is easy to realize large-scale application.

The existing compressed air energy storage power generation technology mainly stores the compressed air, and the heat released by the compression heats the heat transfer oil or water to heat the compressed air for expansion work. This system has a large loss of exhaust air residual energy, and the compressor efficiency and turbine efficiency affect each other, resulting in low efficiency of the overall energy storage power generation system. The existing liquid air energy storage technology fails to effectively utilize the residual energy of the exhaust gas, and it is difficult to achieve the high efficiency of the whole plant.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system, and solve the problems of low energy storage efficiency of the existing compressed air and large loss of exhaust residual energy , Cryogenic separation of nitrogen and oxygen through compressed air, decoupling the compression process and the expansion process, you can gasify the liquid gas and absorb the compression heat storage into the turbine to generate electricity, and the liquid oxygen and liquid nitrogen can also be used as industrial products. The turbine exhaust mixed boiler flue gas is circulated into the boiler here, effectively utilizing the internal energy of the exhaust gas, and at the same time increasing the carbon dioxide concentration in the exhaust gas, effectively reducing the operating cost of carbon capture.

The purpose of this invention is to realize through the following scheme:

A thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system, comprising a low-pressure compressor, a high-pressure compressor, a solid particle heat storage system and a lava heat storage system, the low-pressure compressor and the high-pressure compressor are driven by a motor or Driven by the steam turbine, when the electricity load of the power grid is small or the power plant has surplus electricity, the excess electricity drives the low-pressure compressor and the high-pressure compressor to compress the air sucked from the atmosphere; the compression increases the temperature of the air and passes through the lava heat storage system. And the solid particle heat storage system stores the heat of the compression process.

Further, the solid particle heat storage system includes a first-stage solid particle heat-absorbing heat exchanger, an expansion section solid particle heat-releasing heat exchanger, a solid particle heat storage tank and a second-stage solid particle heat-absorbing heat exchanger; the solid heat storage The particles are transported from the solid particle heat storage tank by compressed air to the first-stage solid particle heat-absorbing heat exchanger for heat absorption, and then return to the solid particle heat storage tank; the solid heat storage particles are transported from the solid particle heat storage tank by compressed air to The first-stage solid particles absorb heat in the heat-absorbing heat exchanger, and then return to the solid particle heat storage tank. The air is compressed to above 450 ℃ by the low pressure compressor, and cooled to about 220 ℃ through the first-stage solid particle heat-absorbing heat exchanger.

Further, the air from the first-stage solid particle heat-absorbing heat exchanger enters the high-pressure compressor for compression, and after compression, the temperature rises to above 650°C, and the heat is stored in the lava heat storage system.

Further, the lava heat storage system includes a compression section lava heat absorbing heat exchanger, a high temperature lava storage tank, a compression section lava pump, an expansion section lava pump and an expansion section lava heat exchanger; the high temperature lava in the high temperature lava storage tank is composed of The lava pump in the compression section is transported into the lava heat-absorbing heat exchanger in the compression section to absorb heat, and the endothermic lava flows back to the high-temperature lava storage tank; the high-pressure mixture preliminarily heated by the solid particle exothermic heat exchanger in the expansion section enters the lava in the expansion section In the exothermic heat exchanger, the high-temperature lava extracted from the high-temperature lava storage tank by the lava pump in the expansion section is further heated, and the heated high-temperature and high-pressure gas enters the gas power generation turbine to generate electricity, and the heat-exchanged lava flows back under the residual pressure of the lava pump in the expansion section. Enter the high-temperature lava storage tank; the high-temperature air at the outlet of the high-pressure compressor enters the lava heat-absorbing heat exchanger in the compression section to cool down to about 560 °C, and then enters the second-stage solid particle heat-absorbing heat exchanger to heat the solid particles.

Further, the solid heat storage particles are transported from the solid particle heat storage tank by compressed air to the second-stage solid particle heat-absorbing heat exchanger and the outlet air of the lava heat-absorbing heat exchanger in the compression section for heat exchange, and the temperature of the high-pressure air is cooled to 320 ° C Left and right, the solid particles after heat exchange return to the solid particle heat storage tank.

Further, the high-pressure air enters the expander after passing through the particle heat exchanger, and the high-pressure air expands to drive the engine to generate electricity and connect it to the power grid.

Further, the air at the outlet of the cooler enters the rectification tower for fractionation, and the liquid oxygen enters the liquid oxygen storage tank; most of the fractionated liquid nitrogen is bottled and sold as a by-product, and the liquid oxygen can be bottled and sold according to the actual situation or used through the back-end system. to generate electricity.

Further, in the peak period of electricity consumption or when the power grid needs to adjust the peak, the liquid oxygen is transported to the liquid oxygen gasifier through the liquid oxygen pump for gasification. After the gasification pressure reaches about 4.6MPa, it enters the high-pressure gas buffer tank; The pump is transported to the liquid nitrogen gasifier for gasification. After the gasification pressure reaches about 4.6MPa, it enters the high-pressure gas buffer tank 22 to be mixed with high-pressure oxygen. According to the demand for peak regulation, the oxygen mixing ratio can be adjusted to 30-80%.

Further, the mixed high-pressure mixed gas enters the solid particle exothermic heat exchanger in the expansion section to absorb heat, and the high-pressure mixed gas is heated to about 260 ° C, and then enters the lava heat exchange system for heating, and passes through the lava exothermic heat exchanger in the expansion section. The temperature rises to around 550°C.

Further, the high-pressure and high-temperature mixed gas heated by the lava enters the gas power generation turbine to expand to do work, drive the generator to generate electricity, and integrate it into the power grid. The size of peak-shaving power generation is adjusted by the demand on the grid side, through the gasification of liquid oxygen and liquid, and by controlling the amount of high-pressure air entering the gas power generation turbine to do work.

Further, the exhaust gas at the outlet of the gas power generation turbine has a certain amount of internal energy, and the direct emission loss is relatively large. This part of oxygen enrichment is mixed with the boiler flue gas into the flue gas oxygen enrichment mixer, and a certain proportion of high temperature oxygen enrichment is configured to enter the boiler for combustion. landfill. The oxygen enrichment ratio of the gas entering the boiler can be controlled by adjusting the oxygen ratio entering the high pressure gas buffer tank and the gas volume entering the flue gas oxygen enrichment mixer from the CCUS outlet.

Beneficial effects of the present invention:

The compressed air cryogenic energy storage system of the thermal power plant of the present invention decouples the compression process and the expansion process of the gas, through the two-stage compression interstage cooling, the compressor can reach the maximum efficiency, and the heat storage system heats and expands the work gas to improve the gas efficiency. Power generation turbine efficiency, thereby increasing overall system efficiency.

The compressed air cryogenic energy storage system of the thermal power plant of the present invention is designed with a lava heat exchange system and a solid particle heat storage system. These two heat storage methods have the characteristics of large heat storage and high medium temperature, which can greatly improve the temperature before entering the gas power generation turbine. Gas temperature, and the gas pressure after gasification can be greatly increased by the liquid oxygen pump and liquid nitrogen pump, so that the total temperature and total pressure of the gas at the inlet of the power generation turbine can be increased, thereby effectively improving the efficiency of the gas power generation turbine.

The compressed air cryogenic energy storage system of the thermal power plant of the present invention is provided with a cryogenic unit, which can realize product diversification, and the liquid oxygen and liquid nitrogen after rectification can be sold as by-products or flexibly connected to the system for power generation according to peak regulation conditions; When a large amount of power is required in the peak shaving process, liquid oxygen and liquid nitrogen can quickly enter the turbine to generate power through the process of rapid gasification and reheating. The system has fast response speed and high adjustment flexibility.

The compressed air cryogenic energy storage system of the thermal power plant of the present invention is provided with a cryogenic unit, the storage capacity of liquid oxygen and liquid nitrogen after rectification is large, and the heat storage capacity of lava heat storage and solid heat storage is also higher than that of conventional heat storage methods. It is easy to increase the temperature and pressure of a large amount of gas used for power generation, which is conducive to the large-scale realization of the entire energy storage system.

The thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system of the invention can effectively utilize the waste heat of the exhaust gas of the power generation turbine; the oxygen-enriched exhaust gas is mixed with the flue gas and then enters the boiler to realize oxygen-enriched combustion, and the oxygen-enriched ratio can be adjusted by The mixing ratio of liquid oxygen and liquid nitrogen is flexibly adjusted, and the adjustment range is wide; the oxygen-enriched combustion coupled with flue gas recirculation can reduce the operating cost of CCUS.

Description of drawings

The drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural representation of the present invention;

In the figure, 1-low pressure compressor, 2-high pressure compressor, 3-first-stage solid particle heat-absorbing heat exchanger, 4-compression section lava heat-absorbing heat exchanger, 5-lava storage tank, 6-compression section lava Pump, 7-expansion section lava pump, 8-expansion section lava exothermic heat exchanger, 9-expansion section solid particle exothermic heat exchanger, 10-solid particle heat storage tank, 11-second-stage solid particle endothermic heat exchanger Heater, 12-expander, 13-gas turbine, 14-rectification tower, 15-cooler, 16-liquid oxygen storage tank, 17-liquid oxygen pump, 18-liquid oxygen gasifier, 19-flue gas rich Oxygen mixer, 20-liquid nitrogen pump, 21-liquid nitrogen gasifier, 22-high pressure gas buffer tank.

Detailed ways

All features disclosed in all embodiments in this specification, or steps in all methods or processes that are implicitly disclosed, may be combined or substituted in any way except for mutually exclusive features and/or steps.

The detailed structure, application principle, function and effect of the present invention, as shown in Figure 1, are described in detail by the following embodiments:

A thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system of the present invention includes a low-pressure compressor 1, a high-pressure compressor 2, a first-stage solid particle heat-absorbing heat exchanger 3, and a compression section lava heat-absorbing system Heat exchanger 4, high temperature lava storage tank 5, compression section lava pump 6, expansion section lava pump 7, expansion section lava exothermic heat exchanger 8, expansion section solid particle exothermic heat exchanger 9, solid particle heat storage tank 10 , second-stage solid particle heat-absorbing heat exchanger 11, expander 12, gas power turbine 13, rectification tower 14, cooler 15, liquid oxygen storage tank 16, liquid oxygen pump 17, liquid oxygen gasifier 18, flue gas Oxygen-enriched mixer 19 , liquid nitrogen pump 20 , liquid nitrogen gasifier 21 and high-pressure gas buffer tank 22 .

The working principle of the invention is as follows: the compressor is driven to compress the air to store electric energy by the power plant bottom computer or the surplus electric energy, the compressor efficiency is improved through the inter-cooling heat exchange during the compression process, the compressed air drives the generator to generate electricity through the turbo expander, and The temperature of the air exhausted from the turboexpander decreases, and then enters the rectification tower to realize air liquefaction. When the power grid needs electricity, the stored liquid oxygen and liquid nitrogen are released and heated by the lava heat storage and solid particle heat storage system at the front end of the system to obtain high temperature. The high-pressure compressed gas enters the turbine for power generation, and the system increases the total temperature and total pressure of the gas entering the power generation turbine, thereby improving the power generation efficiency. The turbine exhaust gas has a certain amount of heat energy, and the composition can adjust the oxygen content through the ratio of liquid oxygen and liquid nitrogen. After mixing with the boiler flue gas, it enters the boiler to realize oxygen-enriched combustion. By increasing the proportion of oxygen entering the boiler, the carbon dioxide concentration in the flue gas can be increased. Reduced CCUS operating costs.

The present invention will be further described below through specific embodiments.

Example 1: A thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system, including a low-pressure compressor, a high-pressure compressor, a solid particle heat storage system and a lava heat storage system, a low-pressure compressor and a high-pressure compressor It is driven by the motor or driven by the steam turbine. When the electricity load of the power grid is small or the power plant has surplus electricity, the excess electricity drives the low-pressure compressor and the high-pressure compressor to compress the air sucked from the atmosphere; The lava heat storage system and the solid particle heat storage system store the heat of the compression process.

Example 2: On the basis of Example 1, as shown in FIG. 1 , it is a schematic diagram of a thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system of the present invention. When the electricity load of the power grid is small or the power plant has surplus electricity, the excess electricity drives the air sucked by the low-pressure compressor 1 and the high-pressure compressor 2 from the atmosphere and compresses it. The compression process gradually increases the air temperature, and a heat exchanger is installed in the middle of the two-stage compressor to absorb the heat generated by the compression process. The purpose is to improve the efficiency of the compression process and reduce heat loss. The air is compressed to 2.0MPa by the low-pressure compressor 1, above 450°C, and enters the solid particle heat storage system for heat exchange. After the first-stage solid particle heat-absorbing heat exchanger 3 is cooled to about 220°C, it enters the high-pressure compressor 2 to continue compression. After compression, the temperature rises to above 650°C and the pressure is 4.6MPa. The gas at the outlet of the high-pressure compressor enters the lava heat-absorbing heat exchanger 4 in the compression section to cool down to about 560 °C, and then enters the second-stage solid particle heat-absorbing heat exchanger 11 to heat the solid particles, and the temperature of the high-pressure air is cooled to about 320 °C.

The high-pressure air enters the expander 12 after passing through the particle heat exchanger, and the high-pressure air expands to drive the engine to generate electricity and connect it to the power grid.

The air at the outlet of the cooler 15 enters the rectification tower 14 for fractionation, and the liquid oxygen enters the liquid oxygen storage tank 16 . Most of the fractionated liquid nitrogen is bottled and sold as a by-product, and the liquid oxygen can be bottled and sold according to the actual situation or used to generate electricity through the back-end system.

In the peak period of electricity consumption or when the power grid needs to adjust the peak, the liquid oxygen is transported to the liquid oxygen gasifier 18 for gasification through the liquid oxygen pump 17, and enters the high pressure gas buffer tank 22 after the gasification pressure reaches about 4.6MPa. The liquid nitrogen is transported by the liquid nitrogen pump 20 to the liquid nitrogen gasifier 21 for gasification. After the gasification pressure reaches about 4.6MPa, it enters the high-pressure gas buffer tank 22 and is mixed with high-pressure oxygen. According to the demand for peak regulation, the oxygen mixing ratio can be adjusted to 30 ~80%.

The mixed high-pressure mixed gas enters the solid particle exothermic heat exchanger 9 in the expansion section to absorb heat, the high-pressure mixed gas is heated to about 260 ° C, and then enters the lava heat exchange system for heating, and passes through the lava exothermic heat exchanger 8 in the expansion section. raised to about 550°C.

The high-pressure and high-temperature mixed gas heated by the lava enters the gas generating turbine 13 to expand and do work, and drives the generator to generate electricity, which is integrated into the power grid. The size of the peak-shaving power generation is adjusted by controlling the amount of high-pressure air entering the gas power generation turbine 13 to do work through the demand on the grid side, through the gasification of liquid oxygen and liquid volume.

The exhaust gas at the outlet of the gas turbine 13 has a certain internal energy, and the direct emission loss is relatively large. This part of oxygen enrichment is mixed with the boiler flue gas into the flue gas oxygen enrichment mixer 19, and a certain proportion of high temperature oxygen enrichment is configured to enter the boiler for combustion. or landfill. The oxygen enrichment ratio of the gas entering the boiler can be controlled by adjusting the oxygen ratio entering the high pressure gas buffer tank 22 and the gas volume entering the flue gas oxygen enrichment mixer 19 from the CCUS outlet. Oxygen-enriched combustion can reduce the operating cost of CCUS by increasing the proportion of carbon dioxide in the flue gas.

In addition to the above examples, those skilled in the art can obtain enlightenment from the above disclosure or use knowledge or technology in the relevant field to make changes to obtain other embodiments, the features of each embodiment can be interchanged or replaced, and the changes and changes made by those skilled in the art Without departing from the spirit and scope of the present invention, all should fall within the protection scope of the appended claims of the present invention.

Claims (8)

1. A thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system is characterized by comprising a low-pressure compressor (1), a high-pressure compressor (2), a solid particle heat storage system and a lava heat storage system, wherein the low-pressure compressor (1) and the high-pressure compressor (2) are driven by a motor or driven by a steam turbine, and when the power load of a power grid is small or the power plant has surplus power, redundant electric energy drives the low-pressure compressor (1) and the high-pressure compressor (2) to compress air sucked from the atmosphere; the temperature of the compressed air rises, and the heat in the compression process is stored through the lava heat storage system and the solid particle heat storage system.

2. The system for deep-cooling energy storage and oxygen-enriched combustion carbon capture of compressed air in thermal power plant according to claim 1, wherein the lava heat storage system comprises: the device comprises a compression section lava heat absorption heat exchanger (4), a high-temperature lava storage tank (5), a compression section lava pump (6), an expansion section lava pump (7) and an expansion section lava heat release heat exchanger (8); high-temperature air at the outlet of the high-pressure compressor (2) enters a compression section lava heat absorption heat exchanger (4) for cooling and then enters a solid particle heat storage system; high-temperature lava in the high-temperature lava storage tank (5) is conveyed into the compression section lava heat absorption heat exchanger (4) by the compression section lava pump (6) to absorb heat, and the lava after absorbing heat flows back to the high-temperature lava storage tank (5); high-pressure mixed gas preliminarily heated by the expansion section solid particle heat-releasing heat exchanger (9) enters the expansion section lava heat-releasing heat exchanger (8) to be further heated by high-temperature lava pumped out from the high-temperature lava storage tank (5) by the expansion section lava pump (7), the heated high-temperature high-pressure gas enters the gas power generation turbine (13) to generate power, and the lava subjected to heat exchange flows back into the high-temperature lava storage tank (5) under the residual pressure of the expansion section lava pump (7).

3. The thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system as claimed in claim 2, wherein the solid particle heat storage system comprises a first stage solid particle heat absorption heat exchanger (3), an expansion section solid particle heat release heat exchanger (9), a solid particle heat storage tank (10) and a second stage solid particle heat absorption heat exchanger (11); high-temperature air at the outlet of the high-pressure compressor (2) enters a compression section lava heat absorption heat exchanger (4) for cooling and then enters a second-stage solid particle heat absorption heat exchanger (11) of the solid particle heat storage system for heating solid particles; the solid heat storage particles are conveyed from the solid particle heat storage tank (10) to the first-stage solid particle heat absorption heat exchanger (3) by compressed air to absorb heat, and then return to the solid particle heat storage tank (10); the solid heat storage particles are conveyed from the solid particle heat storage tank (10) to the second-stage solid particle heat absorption heat exchanger (11) by compressed air to exchange heat with air at the outlet of the compression section lava heat absorption heat exchanger (4), and the solid particles after heat exchange return to the solid particle heat storage tank (10); the mixed high-pressure mixed gas enters an expansion section solid particle heat release heat exchanger (9) to absorb heat.

4. The system for cryogenic energy storage and oxygen-enriched combustion carbon capture of compressed air in a thermal power plant according to claim 3, characterized by comprising an expander (12) and a cooler (15), wherein the high-pressure air enters the expander (12) after passing through the second-stage solid particle heat absorption heat exchanger (11), the high-pressure air expands to work to drive the engine to generate power and is merged into a power grid, and the high-pressure air passes through the cooler (15) after the temperature of the compressed air is reduced.

5. The thermal power plant compressed air cryogenic energy storage and oxygen-enriched combustion carbon capture system as claimed in claim 4, characterized by comprising a rectifying tower (14) and a liquid oxygen storage tank (16), wherein air at the outlet of the cooler (15) enters the rectifying tower (14) for fractionation, and liquid oxygen enters the liquid oxygen storage tank (16).

6. The system for deep-cooling energy storage and oxygen-enriched combustion carbon capture of compressed air of a thermal power plant according to claim 5, characterized in that when the peak electricity utilization period or the peak load of a power grid needs to be adjusted, liquid oxygen is conveyed to the liquid oxygen gasifier (18) through the liquid oxygen pump (17) to be gasified, and then enters the high-pressure gas buffer tank (22) after being gasified; liquid nitrogen is conveyed into a liquid nitrogen vaporizer (21) through a liquid nitrogen pump (20) to be vaporized, and the vaporized liquid nitrogen enters a high-pressure gas buffer tank (22) to be mixed with high-pressure oxygen.

7. The system for deep-cooling energy storage and oxygen-enriched combustion carbon capture of compressed air in a thermal power plant according to claim 6, characterized by comprising a gas power generation turbine (13), wherein high-pressure and high-temperature mixed gas heated by lava enters the gas power generation turbine (13) to expand and work to drive a generator to generate power and is incorporated into a power grid.

8. The system for deep-cold energy storage and oxygen-enriched combustion carbon capture of compressed air of a thermal power plant as claimed in claim 7, characterized in that part of the oxygen enrichment at the outlet of the gas power generation turbine (13) is mixed with the boiler flue gas entering the flue gas oxygen enrichment mixer (19), and the proportion of oxygen entering the high-pressure gas buffer tank (22) and the amount of air entering the flue gas oxygen enrichment mixer (19) at the outlet of the CCUS can be adjusted.

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