CN217354502U - Carbon-based renewable combustion cycle system driven by new energy - Google Patents
Carbon-based renewable combustion cycle system driven by new energy Download PDFInfo
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- CN217354502U CN217354502U CN202123365813.5U CN202123365813U CN217354502U CN 217354502 U CN217354502 U CN 217354502U CN 202123365813 U CN202123365813 U CN 202123365813U CN 217354502 U CN217354502 U CN 217354502U
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Abstract
The utility model provides a new forms of energy driven carbon base can regenerate combustion cycle system relates to energy cyclic utilization technical field. The system at least comprises a carbon-based combined thermal power generation module of a power generation unit for generating power generation working medium based on fuel combustion, a new energy power generation module, a power transmission module, a carbon dioxide processing module and a liquid fuel preparation module. The system can effectively recycle carbon-based energy and new energy; the stable power is ensured by combining the thermal power and new energy matching, and the safety is high; the liquid fuel is prepared by electrolyzing carbon dioxide discharged by new energy and combined thermal power, so that the carbon emission is greatly reduced; as the by-product produced by liquid fuel (such as methanol) can be conveniently burnt off by the carbon-based combined thermal power generation module for power generation, the requirement on selectivity is greatly reduced, and the production cost of the liquid fuel is greatly reduced.
Description
Technical Field
The utility model relates to an energy cyclic utilization technical field, especially a new forms of energy driven carbon base combustion cycle system that can regenerate.
Background
The current dominant energy sources in China are fossil fuels, namely coal and petroleum, wherein the coal mainly solves the power demand, and the petroleum mainly solves the traffic energy demand. Under the carbon neutral background, China is confronted with main energy transformation to meet the requirements of safety, economy and environmental protection.
At present, the large-scale supply of new energy mainly comprising wind power generation and photovoltaic power generation is realized, and the generated energy of the new energy is in the same order of magnitude as the electric power demand of China. However, the new energy cannot be used as the main energy source, mainly due to the following two points: (1) the new energy is strongly associated with weather and climate, so that the fluctuation problem of the new energy along with the change of the climate is large; (2) energy resources in China are not uniformly distributed geographically, whether fossil energy or new wind and light energy are abundant in west and north regions, but are barren in east and south regions, and the distribution direction of the energy resources is just opposite to the distribution direction of economic activities, so that long-distance transmission of energy is very important, and long-distance transmission of a large amount of unstable new energy power is very difficult.
For this reason, energy storage schemes for new energy electric power have been developed, mainly including hydrogen energy storage and battery energy storage schemes. However, hydrogen is easy to escape, is easy to react with steel, and has a wide explosion range, so that the storage and transportation safety and the use safety which are required by main energy are not provided; meanwhile, hydrogen needs to be pressurized, liquefied, stored and transported, and because the hydrogen is difficult to be pressurized and liquefied, huge electric energy needs to be consumed in the compression process, so that the comprehensive energy efficiency is low, and the hydrogen energy storage scheme has defects in both safety and economy. Because the battery is volatile and stable under disturbance and endogenous reaction after instability can not be inhibited, the fire control difficulty is very high, the battery production and recycling links involve a large amount of pollution and are difficult to recycle, the battery production involves a large amount of consumption of energy storage materials, so that the cost is higher and higher, and the battery energy storage scheme has endogenous major defects in the aspects of safety, environmental protection and economy.
Therefore, there is a need for a new dominant energy solution in carbon and background.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a new energy driven carbon based renewable combustion cycle system that overcomes or at least partially addresses the above-mentioned problems.
An object of the utility model is to provide a can effectively utilize fossil energy and new forms of energy, security height, greatly reduced carbon emission and reduce liquid fuel manufacturing cost's new forms of energy driven carbon base regenerative combustion circulation system by a wide margin.
A further object of the utility model is to reduce the carbon capture cost.
Another further object of the present invention is to save the cost of carbon capture by carbon rich cycle or even omit the carbon capture step.
In particular, according to an aspect of the embodiments of the present invention, there is provided a new energy driven carbon-based renewable combustion cycle system, including:
the carbon-based combined thermal power generation module at least comprises a power generation unit which generates power generation working medium based on fuel combustion;
a new energy power generation module;
the power transmission module is respectively connected with the carbon-based combined thermal power generation module and the new energy power generation module, and is configured to receive all power generated by the carbon-based combined thermal power generation module as first power and at least a part of power generated by the new energy power generation module as second power, so that the first power and the second power are combined according to a preset proportion and then transmitted to a load as stable power;
the carbon dioxide processing module is connected with the carbon-based combined thermal power generation module, is configured to process the carbon dioxide-containing flue gas discharged by the carbon-based combined thermal power generation module to obtain carbon dioxide meeting the target requirement, and provides at least part of the carbon dioxide to the liquid fuel preparation module; and
the liquid fuel preparation module is connected with the new energy power generation module, the carbon dioxide treatment module and the carbon-based combined thermal power generation module respectively, is configured to receive surplus power generated by the new energy power generation module, prepares liquid fuel by water electrolysis by using supplied carbon dioxide under the driving of the surplus power, and returns at least part of the generated liquid fuel and combustible byproducts as fuel to the power generation unit of the carbon-based combined thermal power generation module, which generates power generation working medium based on fuel combustion.
Optionally, the new energy power generation module comprises a wind power generation unit and/or a photovoltaic power generation unit.
Optionally, the carbon-based combined thermal power generation module comprises a gas turbine power generation unit and a carbon-based material-based power generation unit; and is
The liquid fuel preparation module is coupled to the gas turbine power generation unit to return at least a portion of the produced liquid fuel and combustible byproducts as fuel to the gas turbine power generation unit.
Optionally, the power generation unit based on a carbon-based material is a coal-fired steam turbine power generation unit.
Optionally, the carbon-based material based power generation unit is a biomass fired boiler-steam turbine power generation unit or a natural gas boiler-steam turbine power generation unit.
Optionally, the carbon dioxide treatment module comprises a carbon capture module, and the carbon capture module comprises:
the absorption tower and the desorption tower are connected in sequence, are respectively connected with the carbon-based combined thermal power generation module and the liquid fuel preparation module, and are respectively configured to absorb carbon dioxide in flue gas discharged by the carbon-based combined thermal power generation module through an absorbent and desorb the carbon dioxide under the action of heat energy so as to release the carbon dioxide absorbed by the absorbent; and
a compression unit connected to the desorption tower and the liquid fuel preparation module, respectively;
wherein the desorber is further configured to deliver the released carbon dioxide to the liquid fuel preparation module and the compression unit, respectively, according to the carbon dioxide demand of the liquid fuel preparation module; and is provided with
The compression unit is configured to perform gaseous compression on the delivered carbon dioxide for carbon dioxide storage, and is further configured to deliver the required carbon dioxide to the liquid fuel preparation module when the carbon dioxide released by the absorption/desorption tower does not meet the carbon dioxide demand of the liquid fuel preparation module.
Optionally, the carbon dioxide treatment module further comprises:
and the carbon dioxide storage device is connected with the compression unit and is configured to store the compressed carbon dioxide so as to realize compressed gas energy storage.
Optionally, the new energy driven carbon based renewable combustion cycle system further comprises:
a first waste heat reuse module connected to the liquid fuel preparation module and the desorption tower, respectively, configured to collect and store waste heat generated during the liquid fuel preparation process, and to transfer the waste heat to the desorption tower to provide heat for carbon dioxide desorption.
Optionally, the power generation unit based on the carbon-based material is a power generation unit using carbon dioxide as a cycle fluid, and a gas input end of the power generation unit using carbon dioxide as a cycle fluid is connected with a gas output end of the gas turbine power generation unit.
Optionally, the new energy driven carbon-based renewable combustion cycle system further comprises:
and the oxygen-enriched combustion supply pipeline is connected with the carbon-based combined thermal power generation module and the liquid fuel preparation module, and is configured to convey oxygen generated by the liquid fuel preparation module in the water electrolysis process to a power generation unit of the carbon-based combined thermal power generation module, which generates a power generation working medium based on fuel combustion, so as to carry out oxygen-enriched combustion.
Optionally, the carbon dioxide processing module comprises a compression module configured to provide at least a portion of the flue gas exhausted by the carbon-based combined thermal power generation module to the liquid fuel preparation module according to the carbon dioxide demand of the liquid fuel preparation module, and perform gas compression storage and/or compression energy storage on the remaining flue gas.
Optionally, the liquid fuel is methanol;
the new energy driven carbon based renewable combustion cycle system further comprises:
a thermal decomposition module connected between the power generation unit of the carbon-based combined thermal power generation module that generates the power generation medium based on fuel combustion and the liquid fuel preparation module, and configured to thermally decompose at least a portion of the liquid fuel and the combustible by-products before returning them to the power generation unit that generates the power generation medium based on fuel combustion; and
and the second waste heat reuse module is respectively connected with the liquid fuel preparation module and the thermal decomposition module, is configured to collect and store waste heat generated in the liquid fuel preparation process, and conveys the waste heat to the thermal decomposition module.
Optionally, the new energy driven carbon based renewable combustion cycle system further comprises:
and the byproduct storage and delivery module is respectively connected with the power generation unit generating the power generation working medium based on fuel combustion and the liquid fuel preparation module, is configured to store liquid and gaseous combustible byproducts generated in the liquid fuel preparation, and delivers the liquid and gaseous combustible byproducts to the power generation unit generating the power generation working medium based on fuel combustion of the carbon-based combined thermal power generation module.
The utility model provides an among the carbon back renewable combustion cycle system of new forms of energy driven, as stable power output after the electric power that thermal power module produced is united with the carbon back and new forms of energy electric power according to certain proportion ratio, the carbon dioxide that utilizes abundant new forms of energy electric power and carbon back to unite thermal power module power generation in-process to produce liquid fuel such as methyl alcohol simultaneously, and at least partly and the flammable accessory substance of the liquid fuel that will make return carbon back and unite thermal power module and be used for the electricity generation with stable electric wire netting, thereby realize carbon back renewable combustion cycle. The system can effectively recycle carbon-based energy and new energy; the stable power is ensured by combining the thermal power and new energy matching, and the safety is high; the carbon dioxide discharged by the combined thermal power is utilized as a raw material to the maximum extent to prepare the liquid fuel, so that the carbon emission is greatly reduced; as the carbon-based combined thermal power generation module can be used for conveniently burning the byproducts generated by the production of the liquid fuel (such as methanol) for power generation, the requirement on selectivity is greatly reduced, and the production cost of the liquid fuel is greatly reduced.
Further, the utility model discloses an among the new forms of energy driven carbon base combustion cycle system that can regenerate, carbon capture is carried out to the carbon emission of uniting the thermoelectricity through absorption/desorption link to be used for the desorption link of carbon capture with the waste heat recovery in the liquid fuel preparation process, reduced carbon capture cost, thereby improve whole efficiency.
Further, the utility model discloses an among the combustion cycle system can be regenerated to new forms of energy driven carbon back, supply for carbon back joint thermal power module through a large amount of oxygen with liquid fuel preparation production and be used for the oxygen boosting burning, can further improve thermoelectricity generating efficiency, obtain the flue gas that is rich in carbon dioxide simultaneously to practice thrift the investment and the running cost of carbon entrapment greatly.
Furthermore, oxygen generated by liquid fuel preparation is utilized to carry out oxygen-enriched combustion, so that carbon-enriched renewable combustion circulation is realized, the concentration of carbon dioxide in flue gas discharged by thermal power can be greatly improved, and the simple carbon capture can be carried out on the premise of not obviously reducing the liquid fuel preparation efficiency, and even the carbon capture link is omitted. Furthermore, by controlling the proportion of the liquid fuel returning to the carbon-based combined thermal power generation module, the oxidant required by the carbon-based combined thermal power generation module can be completely provided by the oxygen generated by the preparation of the liquid fuel without mixing air, and at the moment, the flue gas generated by the combined thermal power generation is almost pure carbon dioxide, so that the carbon capture link with huge investment can be omitted.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following description will particularly refer to specific embodiments of the present invention.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system according to an embodiment of the present invention;
FIG. 2 illustrates a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system in accordance with another embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system according to yet another embodiment of the present disclosure;
fig. 4 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system according to yet another embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system according to yet another embodiment of the present invention;
fig. 6 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system in accordance with yet another embodiment of the present disclosure;
fig. 7 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system in accordance with yet another embodiment of the present invention;
fig. 8 shows a schematic diagram of a new energy driven carbon based renewable combustion cycle system, according to yet another embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the above technical problem, the utility model provides a Carbon base Renewable Combustion Cycle (CRCC) system of new forms of energy driven, the following combines the figure to carry out detailed description. It should be noted that solid arrows in the drawings indicate the corresponding flow of electricity, material, or heat.
Fig. 1 shows a schematic diagram of a new energy driven carbon based renewable combustion cycle system 100 according to an embodiment of the present invention. Referring to fig. 1, a new energy-powered carbon-based renewable combustion cycle system 100 may generally include a carbon-based combined thermal power generation module 110, a new energy power generation module 120, a power transmission module 130, a carbon dioxide processing module 140, and a liquid fuel preparation module 150.
The carbon-based cogeneration module 110 may be in the form of a cogeneration power plant that includes at least power generation units that generate power based on the combustion of fuel. The power generation working medium mentioned herein refers to a fluid working medium, such as steam, high-temperature and high-pressure gas (such as carbon dioxide) and the like, which can drive a turbine to convert chemical energy into mechanical energy so as to drive a generator to generate power. The fuel burned in the power generation unit can be the current main energy, such as coal, petroleum and natural gas, and can also be a novel energy, such as biomass and the like. For example, in some particular embodiments, the power generation unit that generates the power generation working fluid based on the combustion of the fuel may be at least one of a coal-fired steam turbine power generation unit, a biomass-fired boiler-steam turbine power generation unit, a natural gas boiler-steam turbine power generation unit, a gas turbine power generation unit, and the like.
The new energy power generation module 120 may refer to a module that generates power by using renewable energy based on new technology, for example, solar energy, wind energy, geothermal energy, ocean energy, and the like. In a particular embodiment, new energy generation module 120 may include a wind power generation unit that generates electricity using wind energy and/or a photovoltaic power generation unit that generates electricity using solar energy.
The power transmission module 130 is connected to the carbon-based cogeneration module 110 and the new energy power generation module 120, respectively. Specifically, the total power output terminal of the carbon-based combined thermal power generation module 110 is connected to the power input terminal of the power transmission module 130, so that the power transmission module 130 can receive all the power generated by the carbon-based combined thermal power generation module 110 as the first power. Meanwhile, a power output end of the new energy power generation module 120 is also connected to a power input end of the power transmission module 130, so that the power transmission module 130 can receive at least a portion of the power generated by the new energy power generation module 120 as the second power. The power transmission module 130 combines the first power and the second power according to a preset ratio and transmits the combined power to the load as a stable power. The preset ratio can be set according to the actual application requirement, and can be set to any value in the range of 1:2 to 2:1, such as 1:2, 2:3, 1:1, 3:2, 2:1, and the like. Preferably, the preset ratio may be set to 1:1, and at this ratio, an optimal balance may be achieved between the use of new energy power and the stability of the power after the proportioning is maintained. The power transmission module 130 may include a "wind, solar, and fire bundle" power transmission line and necessary grid devices, such as a grid-connected device, a transformer, a power distribution cabinet, etc., which are well known in the art and will not be described in detail herein.
The carbon dioxide processing module 140 is coupled to the carbon-based cogeneration module 110. Specifically, the gas output of the carbon-based combined thermal power module 110 is connected to the gas input of the carbon dioxide processing module 140. The carbon dioxide processing module 140 processes the carbon dioxide-containing flue gas discharged from the carbon-based combined thermal power generation module 110 to obtain carbon dioxide meeting a target requirement, and provides at least part of the carbon dioxide to the liquid fuel preparation module 150. The carbon dioxide processing module 140 may employ a carbon capture stage or other stages according to the concentration of carbon dioxide in the exhaust of the carbon-based cogeneration module 110, which will be described later.
The liquid fuel preparation module 150 is connected to the new energy power generation module 120, the carbon dioxide treatment module 140, and the carbon-based cogeneration module 110, respectively. Specifically, the power input end of the liquid fuel preparation module 150 is connected to another power output end of the new energy power generation module 120, the gas input end is connected to the gas output end of the carbon dioxide processing module 140, and the product output end is connected to the fuel input end of the power generation unit generating the power generation working medium based on fuel combustion in the carbon-based combined thermal power generation module 110. The liquid fuel preparation module 150 receives surplus power generated by the new energy power generation module 120, prepares liquid fuel through water electrolysis using supplied carbon dioxide under the driving of the surplus power, and returns at least a part of the generated liquid fuel and combustible byproducts as fuel to the power generation unit generating power generation medium based on fuel combustion in the carbon-based combined thermal power generation module 110. The remaining liquid fuel is then stored as a product output or may be piped to the intended user.
For example, in some specific embodiments, when the carbon-based cogeneration module 110 includes at least one of a coal-fired steam turbine power generation unit, a biomass-fired boiler-steam turbine power generation unit, a natural gas boiler-steam turbine power generation unit, a gas turbine power generation unit, and the like as the power generation unit that generates the power generation medium based on fuel combustion, at least a portion of the liquid fuel and the combustible byproduct generated by the liquid fuel preparation module 150 may be returned as the fuel to the power generation unit. Of course, when the carbon-based combined thermal power generation module 110 includes two or more power generation units that generate power generation working medium based on fuel combustion, at least a portion of the liquid fuel and the combustible by-products may return to each of the two or more power generation units, or may return to only any one of the two or more power generation units or a specific power generation unit, and the number of power generation units to which the liquid fuel and the combustible by-products return and the distribution ratio between the power generation units may be set according to actual application requirements, which is not particularly limited by the present invention.
The liquid fuel may be methanol or other carbon, hydrogen and oxygen based liquid fuels. In one specific embodiment, the liquid fuel produced may be methanol, which may be used as a substitute for gasoline or diesel. Combustible byproducts may include combustible gaseous byproducts and combustible liquid byproducts, such as hydrogen, carbon monoxide, methane, formaldehyde, formic acid, and the like.
The embodiment of the utility model provides an among the carbon base renewable combustion cycle system 100 of new forms of energy driven, as stable power output after the electric power that thermal power generation module 110 produced is united with the carbon base according to certain proportion ratio with the new forms of energy electric power, utilize the carbon dioxide that thermal power generation module 110 power generation in-process produced is united to surplus new forms of energy electric power and carbon base simultaneously to carry out water electrolysis preparation for liquid fuel such as methyl alcohol, and at least part and the flammable accessory substance of the liquid fuel that will make return back carbon base and unite thermal power generation module 110 and be used for the electricity generation with stable electric wire netting, thereby realize carbon base renewable combustion cycle. The system can effectively recycle carbon-based energy and new energy; the stable power is ensured by combining the thermal power and new energy matching, and the safety is high; the carbon dioxide discharged by the combined thermal power is utilized as the raw material to the maximum extent to prepare the liquid fuel, so that the carbon emission is greatly reduced.
In addition, those skilled in the art will recognize that the cost of producing liquid fuel (such as methanol) is generally greatly increased with the increase of selectivity requirement, and in the present system, since the byproduct of producing liquid fuel (such as methanol) can be conveniently burned away for power generation by the power generation unit based on fuel combustion in the carbon-based cogeneration module 110, the requirement for selectivity is greatly reduced, i.e., high selectivity is not required, so that the production cost of liquid fuel is greatly reduced, and at the same time, the overall energy efficiency of the system is also greatly increased. In other words, the new energy-driven carbon-based renewable combustion cycle system 100 of the present invention can reduce the selectivity requirement of liquid fuel (such as methanol) synthesis, allow the generation of byproducts, allow a low carbon dioxide conversion rate, and even allow not to perform strict gas separation, but to safely return the liquid fuel and the combustible byproducts to the carbon-based cogeneration module 110 for direct combustion by controlling the flow rate, controlling the container size, the pipeline size, the thermal conductivity, adding a flame retardant, and the like.
Fig. 2 shows a schematic diagram of a new energy driven carbon based renewable combustion cycle system 100, according to another embodiment of the present disclosure.
Referring to fig. 2, in some embodiments, to facilitate recycling of the byproducts of the liquid fuel production, the new energy driven carbon-based renewable combustion cycle system 100 may further include a byproduct storage and delivery module 191. The byproduct storage and delivery module 191 is respectively connected to the power generation unit generating the power generation working medium based on fuel combustion and the liquid fuel preparation module 150 in the carbon-based combined thermal power generation module 110, configured to store the liquid and gaseous combustible byproducts generated in the liquid fuel preparation, and deliver the liquid and gaseous combustible byproducts to the power generation unit generating the power generation working medium based on fuel combustion of the carbon-based combined thermal power generation module 110, so as to generate power or assist in power generation.
With continued reference to fig. 2, in some embodiments, the carbon-based combined-cycle power module 110 may specifically include a gas turbine power generation unit 111 and a carbon-based material based power generation unit 112. The liquid fuel preparation module 150 is connected to the gas turbine power generation unit 111 to return at least a part of the produced liquid fuel and combustible by-products as fuel to the gas turbine power generation unit 111, thereby further improving the power generation efficiency of the entire system. The carbon-based material used by the power generation unit 112 based on the carbon-based material may be the current main energy, such as coal, petroleum, and natural gas, or may be a new energy, such as biomass, or may be a working medium, such as carbon dioxide, which will be described later.
In some embodiments, the carbon-based material based power generation unit 112 may be a coal fired turbine power generation unit 1121, a biomass fired boiler-turbine power generation unit 1122, or a natural gas boiler-turbine power generation unit 1124. Coal-fired turbine power generation unit 1121 may generally include a coal-fueled boiler, a turbine, and a generator, the operating principles of which will be well known to those skilled in the art and will not be described in detail. Coal is the current main energy in China, and the power generation technology of a coal-fired steam turbine is very mature. The biomass fired boiler-turbine power generation unit 1122 is substantially the same or similar in construction to the coal fired turbine power generation unit 1121. Since biomass is derived from carbon dioxide absorbed by biomass, which inherently has carbon neutralization properties, carbon emissions can be further reduced with biomass fuels. Moreover, the biomass power generation itself is divided into two types of direct combustion power generation and gasification power generation, wherein the type of gasification power generation is configured with a gas turbine device, so the biomass combustion boiler-steam turbine power generation unit 1122 can be realized by using the existing biomass power generation device, and simultaneously, the gas turbine device of the existing biomass power generation device itself can be used for gasification combustion of liquid fuel (such as methanol) and byproducts thereof, and no additional gas turbine is needed to be configured, thereby reducing the construction cost of the system. The natural gas boiler/turbine power generation unit 1124 has substantially the same or similar structure as the coal-fired turbine power generation unit 1121, and uses natural gas as a fuel, thereby achieving high combustion efficiency.
Fig. 3 shows a schematic structural diagram of a new energy driven carbon based renewable combustion cycle system according to yet another embodiment of the present invention. Referring to FIG. 3, in some embodiments, the carbon dioxide treatment module 140 may include a carbon capture module 141 to collect carbon dioxide from the exhaust of the cogeneration power via a carbon capture stage.
Specifically, the carbon capture module 141 may include an absorption tower 1411a and an desorption tower 1411b connected in series, which are respectively connected to the carbon-based integrated thermal power generation module 110 and the liquid fuel preparation module 150, and are respectively configured to absorb carbon dioxide in flue gas discharged from the carbon-based integrated thermal power generation module 110 through an absorbent, and to perform desorption under the influence of thermal energy to release the carbon dioxide absorbed by the absorbent. The released carbon dioxide will be delivered to the liquid fuel preparation module 150 as needed. The absorbent may be, for example, alcohol amine, calcium hydroxide, soda lime, sodium carbonate, potassium carbonate, or the like. In practical application, a solution of the absorbent is utilized to contact with the flue gas for carbon dioxide absorption.
Further, the carbon capture module 141 may further include a compression unit 1412 connected to the desorption tower 1411b and the liquid fuel preparation module 150, respectively. The desorption tower 1411b is also configured to deliver the released carbon dioxide to the liquid fuel preparation module 150 and the compression unit 1412, respectively, according to the carbon dioxide demand of the liquid fuel preparation module 150. The compression unit 1412 is configured to perform gaseous compression of the delivered carbon dioxide for carbon dioxide storage and is further configured to deliver the required carbon dioxide to the liquid fuel preparation module 150 when the carbon dioxide released by the desorber 1411b does not meet the carbon dioxide demand of the liquid fuel preparation module 150.
In a further embodiment, the carbon dioxide processing module 140 may also include a carbon dioxide storage device (not shown). The carbon dioxide storage device is connected to the compression unit 1412 and configured to store compressed carbon dioxide to realize compressed gas energy storage. That is, the carbon dioxide storage device also serves as a compressed gas energy storage device, and the work done by the compressed carbon dioxide stored in the carbon dioxide storage device after decompression and release can be recycled for power generation.
In the scheme of the embodiment, since the carbon dioxide is not required to be liquefied and only needs to be subjected to gaseous compression and storage, a large amount of electric power required by the liquefaction of the carbon dioxide is omitted while the storage of partial energy (such as electricity and hydrogen) is replaced by the convenient storage of the carbon dioxide, so that the cost of carbon capture is reduced. The power required for carbon dioxide compression may also come from the new energy generation module 120.
In some embodiments, carbon dioxide treatment module 140 may also include storage unit 143. The storage unit 143 may be connected to the absorption tower 1411a, and configured to store an absorbent having absorbed carbon dioxide, for example, a salt of the absorbent with carbon dioxide, such as a sodium salt, a calcium salt, and the like. By means of the storage of the absorbent, it is likewise possible to replace part of the energy storage with the convenient storage of carbon dioxide.
With continued reference to fig. 3, in some preferred embodiments, the carbon-based renewable combustion cycle system 100 may further include a first waste heat reuse module 161 coupled (and specifically thermally coupled) to the liquid fuel preparation module 150 and the desorber 1411b, respectively, configured to collect and store waste heat generated during the liquid fuel preparation process and to transfer the waste heat to the desorber 1411b to provide heat for carbon dioxide desorption. The first waste heat reuse module 161 may use existing waste heat recovery technologies, such as phase change heat storage materials.
The embodiment carries out carbon capture on the carbon emission of the combined thermal power through the absorption/desorption link, and uses waste heat recovery in the liquid fuel preparation process for the desorption link of carbon capture, thereby solving the huge energy consumption required by carbon capture, not influencing the thermal power output, reducing the carbon capture cost, and improving the overall energy efficiency. According to the test, the carbon capture cost can be reduced to below 50 yuan/ton.
With continued reference to fig. 3, in some embodiments, the liquid fuel produced is methanol. The liquid fuel preparation module 150 may include an electrolytic hydrogen production unit 151 and a methanol synthesis unit 152. Electrolytic hydrogen production unit 151 is connected to new energy power generation module 120, and specifically, a power input end of electrolytic hydrogen production unit 151 is connected to another power output end of new energy power generation module 120 to receive the surplus power output by new energy power generation module 120. The electrolytic hydrogen production unit 151 performs water electrolysis driven by the surplus power to produce hydrogen gas, and also produces oxygen gas. The methanol synthesis unit 152 is respectively connected with the carbon dioxide processing module 140, the electrolytic hydrogen production unit 151 and the power generation unit based on fuel combustion generation working medium in the carbon-based combined thermal power generation module 110. Specifically, the gas input end of the methanol synthesis unit 152 is connected to the gas output end of the carbon dioxide processing module 140 and the hydrogen output end of the electrolytic hydrogen production unit 151, respectively, and the product output end is connected to the fuel input end of the power generation unit generating the power generation working medium based on fuel combustion in the carbon-based combined thermal power generation module 110. Preferably, the product output of the methanol synthesis unit 152 is connected to the gas input of the gas turbine power generation unit 111 in the carbon-based combined cycle power module 110. The methanol synthesis unit 152 is configured to produce methanol using the hydrogen produced by the electrolytic hydrogen production unit 151 and the carbon dioxide provided from the carbon dioxide treatment module 140.
In practical applications, the electrolytic hydrogen production unit 151 will generate waste heat at about 100 ℃ during the water electrolysis process, while the methanol synthesis unit 152 will generate waste heat at about 200 ℃ and 400 ℃ during the synthesis process. The aforementioned first waste heat reuse module 161 may be thermally connected to the electrolytic hydrogen production unit 151 and the methanol synthesis unit 152, respectively, so as to collect and store waste heat generated therefrom, which is recovered for carbon dioxide desorption in the carbon capture stage.
In other embodiments, referring to FIG. 4, the liquid fuel preparation module 150 may include an electrolytic synthesis unit 153 that integrates water electrolysis and liquid fuel (e.g., methanol) synthesis into a single integrated reactor simultaneously. In this case, a power input terminal of the electrolysis-synthesis unit 153 is connected to another power output terminal of the new energy generation module 120 to receive power required for water electrolysis. The gas output of the carbon dioxide processing module 140 is connected to the gas input of the electrolytic synthesis unit 153. The carbon dioxide is used as a working medium and a synthetic raw material to enter the electrolytic synthesis unit 153 to assist the water electrolysis reaction, and simultaneously reacts with the generated hydrogen to synthesize liquid fuel (such as methanol). The surplus carbon dioxide may also carry combustible gaseous byproducts back to the carbon-based combined thermal power module 110, which may improve product carrying capacity and improve electrolysis energy efficiency.
With continued reference to fig. 3 and 4, in some embodiments, the new energy powered carbon-based renewable combustion cycle system 100 may also include an oxycombustion supply line 170, represented by a gray heavy line in the figures. The oxycombustion supply line 170 connects the carbon-based combined-cycle power generation module 110 and the liquid fuel preparation module 150, and is configured to deliver oxygen generated by the liquid fuel preparation module 150 during the preparation of the liquid fuel to the carbon-based combined-cycle power generation module 110 for oxycombustion. In the case where the liquid fuel preparation module 150 includes the electrolytic hydrogen production unit 151, the inlet end of the oxycombustion supply line 170 is connected to the electrolytic hydrogen production unit 151, and in the case where the liquid fuel preparation module 150 includes the electrolytic synthesis unit 153, the inlet end of the oxycombustion supply line 170 is connected to the electrolytic synthesis unit 153. Further, in the case where the gas turbine power generation unit 111 and the carbon-based material-based power generation unit 112 both need to perform fuel combustion, for example, in the case where the carbon-based material-based power generation unit 112 is the coal-fired turbine power generation unit 1121, the biomass-fired boiler-turbine power generation unit 1122, or the natural gas boiler-turbine power generation unit 1124, the outlet end of the oxycombustion supply line 170 is connected to the gas turbine power generation unit 111 and the carbon-based material-based power generation unit 112, respectively, and oxygen is supplied thereto in accordance with their respective oxygen requirements.
In this embodiment, a large amount of oxygen generated by preparing the liquid fuel is supplied to the carbon-based combined thermal power generation module 110 for oxygen-enriched combustion, so that the thermal power generation efficiency can be further improved, and meanwhile, flue gas rich in carbon dioxide is obtained, and the concentration of carbon dioxide in the flue gas is improved, thereby greatly saving the investment and the operation cost of carbon capture.
With continued reference to fig. 3 and 4, in some embodiments, the new energy-driven carbon-based renewable combustion cycle system 100 may further include a thermal decomposition module 180 coupled between the fuel-combustion-based power generation unit of the carbon-based cogeneration module 110 and the liquid fuel preparation module 150. In some particular embodiments, the thermal decomposition module 180 may be connected between the gas turbine power generation unit 111 and the liquid fuel preparation module 150 (which may be specifically the methanol synthesis unit 152 or the electrolytic synthesis unit 153). In some more specific embodiments, the thermal decomposition module 180 may be coupled between a power generation unit (e.g., gas turbine power generation unit 111) of the carbon-based cogeneration module 110 that generates power generation fluid based on fuel combustion and the byproduct storage and delivery module 191. The thermal decomposition module 180 is configured to thermally decompose at least a portion of a liquid fuel (e.g., methanol) and a combustible byproduct before returning them to the power generation unit of the carbon-based cogeneration module 110 that generates a power generation medium based on fuel combustion, increasing a calorific value, thereby improving the combustion efficiency of the power generation unit and thus the power generation efficiency thereof. Taking methanol as an example, the methanol is heated and decomposed into synthesis gas, and the synthesis gas enters the gas turbine power generation unit 111 to be combusted and generate power, so that the power generation efficiency of more than 40% can be obtained.
Further, where the system 100 includes a thermal decomposition module 180, the heat output of the aforementioned first waste heat reuse module 161 may also be connected to the thermal decomposition module 180 such that a portion of the recovered waste heat may be delivered to the thermal decomposition module 180 to provide the heat required for thermal decomposition of the liquid fuel and combustible byproducts that are returned to the carbon-based cogeneration module 110.
The carbon-based renewable combustion circulation scheme realized by combining thermal power with carbon capture and new energy driven liquid fuel preparation is introduced. Specifically, the scheme includes an alcohol-coal cogeneration scheme in which coal and methanol are used as fuel to generate electricity, that is, the carbon-based cogeneration module 110 is composed of a gas turbine power generation unit 111 using methanol as fuel and a coal turbine power generation unit 1121 using coal as fuel. For convenience, the carbon-based combined Cycle power generation module 110 composed of the gas turbine power generation unit 111 and the Coal-fired turbine power generation unit 1121 is not referred to as an alcohol-Coal thermal power plant, and the new energy-driven carbon-based Renewable Combustion Cycle system 100 including the alcohol-Coal thermal power plant may be specifically referred to as a new energy-driven alcohol-Coal Renewable Combustion Cycle (MCRCC) system.
As mentioned above, a large amount of oxygen generated by the liquid fuel preparation can be supplied to the carbon-based combined thermal power generation module 110 through the oxycombustion supply line 170 for oxycombustion, and at this time, because there is no large amount of air (mainly nitrogen) mixed, the concentration of carbon dioxide in the flue gas discharged by the thermal power plant is greatly increased, and at the same time, the nitrogen oxide in the flue gas is reduced, so that the flue gas rich in carbon dioxide can be obtained. In this case, the investment of the carbon capture step can be reduced without significantly reducing the efficiency of liquid fuel production, and only simple carbon capture is performed, even the carbon capture step is omitted. In this case, the new energy driven Carbon-based Renewable Combustion Cycle system 100 of the present invention may also be specifically referred to as a new energy driven Carbon-rich Renewable Combustion Cycle (CR) 2 CC) system.
Fig. 5-8 show schematic structural diagrams of a new energy driven carbon-based renewable combustion cycle system (also referred to as a new energy driven carbon-rich renewable combustion cycle system) 100, according to still further embodiments of the present disclosure. An implementation of the new energy driven carbon rich renewable combustion cycle system is described below with reference to fig. 5-8.
As shown in fig. 5 to 8, inAn oxygen-enriched combustion supply line 170 (indicated by a gray thick solid line) is provided to deliver oxygen generated by the liquid fuel preparation module 150 during water electrolysis to the carbon-based combined thermal power generation module 110 for oxygen-enriched combustion, thereby forming a new energy-driven CR 2 And (3) a CC system.
In some embodiments, the carbon-based material based power generation unit 112 may be a coal fired steam turbine power generation unit 1121, a biomass fired boiler-steam turbine power generation unit 1122, a carbon dioxide cycle power generation unit 1123, or a natural gas boiler-steam turbine power generation unit 1124. The operation of coal-fired turbine power generation unit 1121, biomass-fired boiler-turbine power generation unit 1122, and natural gas boiler-turbine power generation unit 1124 are as described above and will not be repeated here.
The gas input end of the power generation unit 1123 using carbon dioxide as the circulating medium is connected to the gas output end of the gas turbine power generation unit 111, so that the power generation unit 1123 using carbon dioxide as the circulating medium can use the high-temperature carbon dioxide gas burned by the gas turbine power generation unit 111 as the power generation medium, and specifically, the carbon dioxide gas is pressurized to supercritical carbon dioxide to drive the turbine to generate power. The power generation unit 1123 using carbon dioxide as the cycle fluid uses carbon dioxide instead of steam generated by a traditional boiler as the power generation cycle fluid, so that the power generation efficiency can be improved, the water consumption can be reduced, and the complexity of the system can be reduced.
The oxycombustion supply line 170 may be connected differently for different carbon-based material based power generation units 112 depending on whether the carbon-based material based power generation units 112 need to burn fuel. Generally, the oxycombustion supply line 170 connects the liquid fuel preparation module 150 to the power generation units of the carbon-based combined cycle power module 110 that require fuel combustion. Specifically, when the carbon-based material-based power generation unit 112 is the coal-fired steam turbine power generation unit 1121, the biomass-fired boiler-steam turbine power generation unit 1122, or the natural gas boiler-steam turbine power generation unit 1124, the oxycombustion supply line 170 connects two power generation units of the carbon-based cogeneration module 110 with the liquid fuel preparation module 150, respectively; when the power generation unit 112 based on the carbon-based material is the power generation unit 1123 using carbon dioxide as a circulating medium, the oxycombustion supply line 170 connects only the liquid fuel preparation module 150 and the gas turbine power generation unit 111.
Since the concentration of carbon dioxide in the exhaust gas of the carbon-based cogeneration module 110 is greatly increased, the carbon capture process can be greatly simplified or even omitted. In some embodiments, the carbon dioxide processing module 140 may include a compression module 142 configured to provide at least a portion of the flue gas (mostly carbon dioxide) exiting the carbon-based co-fired power generation module 110 to the liquid fuel preparation module 150 and to perform gaseous compression storage and/or compressed energy storage on the remaining flue gas according to the carbon dioxide demand of the liquid fuel preparation module 150. In the embodiment, only carbon dioxide is compressed without carbon capture, so that the cost of carbon capture is saved, and carbon dioxide storage and compressed energy storage are combined into a whole.
In a further embodiment, the carbon dioxide processing module 140 may also include a carbon dioxide storage device (not shown). The carbon dioxide storage device is connected to the compression module 142 and configured to store compressed carbon dioxide to achieve compressed gas energy storage. That is, the carbon dioxide storage device also serves as a compressed gas energy storage device, and the work done by the compressed carbon dioxide stored in the carbon dioxide storage device after decompression and release can be recycled for power generation.
In a preferred embodiment, the return ratio of the liquid fuel to the carbon-based co-fired power generation module 110 may be controlled such that the oxidant required for the carbon-based co-fired power generation module 110 is provided entirely by oxygen delivered by the oxycombustion supply line 170. At this time, air does not need to be added, and the gas discharged from the carbon-based combined thermal power generation module 110 is almost pure carbon dioxide, so that high preparation efficiency and energy efficiency of the whole system can be ensured.
The preferred return ratio of the liquid fuel will be described below by taking a system including the carbon-based cogeneration module 110 formed of the coal-fired turbine power generation unit 1121 and the gas turbine power generation unit 111 as an example.
The reaction equation of coal combustion is C+O 2 ＝CO 2 If 1.5 trillion coal is to be produced to produce 12 million tons of carbon dioxide, 36/48 × 12 tons of oxygen are required. The reaction equation for methanol combustion is 2CH 3 OH+3O 2 ＝2CO 2 +4H 2 O, assuming 6 million tons of methanol are combusted, the oxygen required is 3 × 32/(2 × 32) × 6 ═ 9 million tons. Therefore, the oxygen amount required by the alcohol-coal thermal power plant is 18 hundred million tons.
The water electrolysis reaction formula involved in the preparation process of the methanol is 2H 2 O＝2H 2 +O 2 The hydrogen to methanol reaction formula is 3H 2 +CO 2 ＝CH 3 OH+H 2 O, total reaction formula is 4H 2 O+2CO 2 ＝2CH 3 OH+3O 2 . Thus, the amount of oxygen produced by electrolysis in a total of 12 million tons of methanol produced 6+6 was calculated to be 3 × 32/(2 × 32) × 12-18 million tons. The amount of oxygen produced is exactly equal to the amount of oxygen required for combustion in the combined thermal power plant.
Thus, if half of the methanol (or its equivalent heating value by-product) is maintained for combustion in the cogeneration power plant and half of the methanol is supplied externally as a liquid fuel, complete oxygen combustion can be achieved in the cogeneration power plant without the use of air.
Furthermore, if methanol is not fed out, carbon dioxide will always circulate inside the system and the oxygen electrolyzed out is just enough for complete oxyfuel combustion. In this case, only a small loss of carbon dioxide needs to be replenished without delay.
With continued reference to fig. 5-8, in some embodiments of the new energy driven carbon rich renewable combustion cycle system, liquid fuel preparation module 150 may likewise include electrolytic hydrogen production unit 151 and methanol synthesis unit 152, or electrolytic synthesis unit 153, whose functions have been described previously and are not repeated.
In some embodiments, the liquid fuel preparation module 150 includes an electrolytic hydrogen production unit 151 and a methanol synthesis unit 152, a gas output of the carbon dioxide treatment module 140 (specifically, the compression module 142) is connected to a gas input of the methanol synthesis unit 152, and carbon dioxide is input to the methanol synthesis unit 152 as a raw material for the synthesis reaction.
In other embodiments, the liquid fuel preparation module 150 includes an electrolytic synthesis unit 153, and the gas output of the carbon dioxide treatment module 140 (specifically, the compression module 142) may be connected to the gas input of the electrolytic synthesis unit 153. In this case, carbon dioxide is simultaneously used as a working medium and a synthetic raw material to enter the electrolytic synthesis unit 153 to assist the progress of the water electrolysis reaction, thereby improving the carrying capacity of the product and improving the electrolysis energy efficiency. And, the oxygen-rich combustion supply line 170 is connected between the electrolytic synthesis unit 153 and the carbon-based combined-cycle power generation module 110 to transfer oxygen carried by carbon dioxide generated in the electrolytic synthesis unit 153 during water electrolysis to the carbon-based combined-cycle power generation module 110. In addition, the excessive carbon dioxide can be used as a working medium to carry combustible gaseous byproducts to return to the carbon-based combined thermal power generation module 110 (specifically, the gas turbine power generation unit 111). Therefore, the combustion effect of the combined thermal power plant can be conveniently adjusted by controlling the flow rate of the gas.
With continued reference to fig. 5-8, in some embodiments of the new energy driven carbon rich renewable combustion cycle system, a thermal decomposition module 180 may also be included, coupled between the fuel combustion based power generation unit of the carbon-based cogeneration module 110 (specifically, the gas turbine power generation unit 111) and the liquid fuel preparation module 150, configured to thermally decompose at least a portion of the liquid fuel and the combustible byproducts before returning them to the carbon-based cogeneration module 110.
Further, the system may further include a second waste heat reuse module 162 connected to the liquid fuel preparation module 150 and the thermal decomposition module 180, respectively, configured to collect and store waste heat generated during the liquid fuel preparation process and to transfer the waste heat to the thermal decomposition module 180. The second waste heat reuse module 162 may employ the same or similar configuration as the first waste heat reuse module 161. The energy utilization efficiency of the entire system can be improved by recycling the waste heat generated in the liquid fuel preparation process for the thermal decomposition of the liquid fuel and the combustible by-products returned to the carbon-based combined thermal power generation module 110.
In some embodiments, the new energy driven carbon-based renewable combustion cycle system 100 may further include a gas supplement module 190 coupled to the gas turbine power generation unit 111 and configured to supplement the gas turbine power generation unit 111 with a gas fuel. The gaseous fuel may include natural gas or biomass gasification gas, or the like.
In some embodiments, in the case where the carbon-based power generation unit 112 is the power generation unit 1123 using carbon dioxide as a cycle fluid and carbon dioxide is input to the electrolytic synthesis unit 153 as a fluid to assist electrolysis, the new energy-driven carbon-rich renewable combustion cycle system uses carbon dioxide as a fluid to circulate the whole cycle. At the moment, the carbon dioxide is not only a combustion product, but also a power generation working medium and an electrolysis working medium, and is also an energy storage working medium (comprising gaseous compression storage and compression energy storage). Because carbon dioxide is used as a uniform working medium, the carbon-rich renewable combustion circulation system driven by the new energy can also be called a power generation, regeneration and energy storage system taking carbon dioxide as the uniform working medium.
In some embodiments, a gas treatment module (not shown) may be further disposed between the carbon-based cogeneration module 110 and the carbon dioxide treatment module 140, and is used for purifying the carbon dioxide-containing gas (flue gas) discharged from the carbon-based cogeneration module and then delivering the purified gas into the carbon dioxide treatment module.
According to any one of the above-mentioned optional embodiments or the combination of a plurality of optional embodiments, the embodiment of the present invention can achieve the following advantageous effects:
the utility model provides an among the carbon back renewable combustion cycle system of new forms of energy driven, as stable power output after the electric power that thermal power module produced is united with the carbon back and new forms of energy electric power according to certain proportion ratio, the carbon dioxide that utilizes abundant new forms of energy electric power and carbon back to unite thermal power module power generation in-process to produce liquid fuel such as methyl alcohol simultaneously, and at least partly and the flammable accessory substance of the liquid fuel that will make return carbon back and unite thermal power module and be used for the electricity generation with stable electric wire netting, thereby realize carbon back renewable combustion cycle. The system can effectively recycle carbon-based energy and new energy; the stable power is ensured by combining the thermal power and the new energy source, and the safety is high; the carbon dioxide discharged by the combined thermal power is utilized as a raw material to the maximum extent to prepare the liquid fuel, so that the carbon emission is greatly reduced; as the by-product produced by liquid fuel (such as methanol) can be conveniently burnt off by the carbon-based combined thermal power generation module for power generation, the requirement on the selectivity of methanol production is greatly reduced, and the production cost of the liquid fuel is greatly reduced.
Further, the utility model discloses an among the new forms of energy driven carbon base combustion cycle system that can regenerate, carbon capture is carried out to the carbon emission of uniting the thermoelectricity through absorption/desorption link to be used for the desorption link of carbon capture with the waste heat recovery in the liquid fuel preparation process, reduced carbon capture cost, thereby improve whole efficiency.
Further, the utility model discloses an among the combustion cycle system can be regenerated to new forms of energy driven carbon back, supply for carbon back joint thermal power module through a large amount of oxygen with liquid fuel preparation production and be used for the oxygen boosting burning, can further improve thermoelectricity generating efficiency, obtain the flue gas that is rich in carbon dioxide simultaneously to practice thrift the investment and the running cost of carbon entrapment greatly.
Furthermore, oxygen generated by liquid fuel preparation is utilized to carry out oxygen-enriched combustion, so that carbon-enriched renewable combustion circulation is realized, the concentration of carbon dioxide in flue gas discharged by thermal power can be greatly improved, and the simple carbon capture can be carried out on the premise of not obviously reducing the liquid fuel preparation efficiency, and even the carbon capture link is omitted. Furthermore, by controlling the proportion of the liquid fuel returning to the carbon-based combined thermal power generation module, the oxidant required by the carbon-based combined thermal power generation module can be completely provided by the oxygen generated by the preparation of the liquid fuel without mixing air, and at the moment, the flue gas generated by the combined thermal power generation is pure carbon dioxide, so that the carbon capture link with huge investment can be omitted.
Further, the utility model discloses an among the carbon base combustion cycle system that can regenerate of new forms of energy driven, need not carry out direct storage to electricity and hydrogen, but the convenient storage of carbon dioxide, heat, methyl alcohol is replaced, realizes saving the new forms of energy in different stages from this, has strengthened stability and security. Meanwhile, the compressed storage of the carbon dioxide can have the function of energy storage.
Further, the utility model discloses an among the carbon base renewable combustion cycle system of new forms of energy driven, need not hydrogen liquefaction and carbon dioxide liquefaction, left out their required a large amount of electric powers, reduced the cost of system's operation.
Further, the utility model discloses a new forms of energy driven carbon base can regenerate combustion cycle system's operation does not relate to the complex material and synthesizes, can not introduce a large amount of pollutions, and the feature of environmental protection is good.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (13)
1. A new energy driven carbon based renewable combustion cycle system comprising:
the carbon-based combined thermal power generation module at least comprises a power generation unit which generates power generation working medium based on fuel combustion;
a new energy power generation module;
the power transmission module is respectively connected with the carbon-based combined thermal power generation module and the new energy power generation module, and is configured to receive all power generated by the carbon-based combined thermal power generation module as first power and at least a part of power generated by the new energy power generation module as second power, so that the first power and the second power are combined according to a preset proportion and then transmitted to a load as stable power;
the carbon dioxide processing module is connected with the carbon-based combined thermal power generation module, is configured to process the carbon dioxide-containing flue gas discharged by the carbon-based combined thermal power generation module to obtain carbon dioxide meeting the target requirement, and provides at least part of the carbon dioxide to the liquid fuel preparation module; and
the liquid fuel preparation module is connected with the new energy power generation module, the carbon dioxide treatment module and the carbon-based combined thermal power generation module respectively, is configured to receive surplus power generated by the new energy power generation module, prepares liquid fuel by water electrolysis by using supplied carbon dioxide under the driving of the surplus power, and returns at least part of the generated liquid fuel and combustible byproducts as fuel to the power generation unit of the carbon-based combined thermal power generation module, which generates power generation working medium based on fuel combustion.
2. The new energy driven carbon-based renewable combustion cycle system of claim 1, wherein the new energy power generation module comprises a wind power generation unit and/or a photovoltaic power generation unit.
3. The new energy driven carbon-based renewable combustion cycle system of claim 1, wherein the carbon-based combined thermal power generation module comprises a gas turbine power generation unit and a carbon-based material based power generation unit; and is
The liquid fuel preparation module is coupled to the gas turbine power generation unit to return at least a portion of the produced liquid fuel and the combustible by-products to the gas turbine power generation unit as fuel.
4. The new energy driven carbon-based renewable combustion cycle system of claim 3, wherein the carbon-based material based power generation unit is a coal fired turbine power generation unit.
5. The new energy driven carbon-based renewable combustion cycle system according to claim 3, wherein said carbon-based material based power generation unit is a biomass fired boiler-steam turbine power generation unit or a natural gas boiler-steam turbine power generation unit.
6. The new energy driven carbon-based renewable combustion cycle system of claim 4 or 5, wherein the carbon dioxide processing module comprises a carbon capture module, and the carbon capture module comprises:
an absorption tower and a desorption tower connected in sequence, respectively connected to the carbon-based combined thermal power generation module and the liquid fuel preparation module, and respectively configured to absorb carbon dioxide in flue gas discharged from the carbon-based combined thermal power generation module through an absorbent, and to desorb the carbon dioxide absorbed by the absorbent under the action of heat energy; and
a compression unit connected to the desorption tower and the liquid fuel preparation module, respectively;
wherein the desorber is further configured to deliver the released carbon dioxide to the liquid fuel preparation module and the compression unit, respectively, according to a carbon dioxide demand of the liquid fuel preparation module; and is
The compression unit is configured to gaseous compress the delivered carbon dioxide for carbon dioxide storage and is further configured to deliver the required carbon dioxide to the liquid fuel preparation module when the carbon dioxide released by the desorber does not meet the carbon dioxide demand of the liquid fuel preparation module.
7. The new energy driven carbon-based renewable combustion cycle system of claim 6, wherein the carbon dioxide treatment module further comprises:
and the carbon dioxide storage device is connected with the compression unit and is configured to store the compressed carbon dioxide so as to realize compressed gas energy storage.
8. The new energy driven carbon-based renewable combustion cycle system of claim 6 further comprising:
a first waste heat reuse module connected to the liquid fuel preparation module and the desorption tower, respectively, configured to collect and store waste heat generated during liquid fuel preparation, and to transfer the waste heat to the desorption tower to provide heat for carbon dioxide desorption.
9. The new energy driven carbon-based renewable combustion cycle system of claim 3, wherein the carbon-based material power generation unit is a carbon dioxide power generation unit using carbon dioxide as a cycle fluid, and a gas input end of the carbon dioxide power generation unit is connected to a gas output end of the gas turbine power generation unit.
10. The new energy driven carbon based renewable combustion cycle system of claim 1, further comprising:
and the oxygen-enriched combustion supply pipeline is connected with the carbon-based combined thermal power generation module and the liquid fuel preparation module, and is configured to convey oxygen generated by the liquid fuel preparation module in the water electrolysis process to a power generation unit of the carbon-based combined thermal power generation module, which generates a power generation working medium based on fuel combustion, so as to carry out oxygen-enriched combustion.
11. The new energy driven carbon-based renewable combustion cycle system of claim 10, wherein the carbon dioxide processing module comprises a compression module configured to provide at least a portion of the flue gas exiting the carbon-based combined thermal power generation module to the liquid fuel preparation module and to perform gaseous compression storage and/or compressed energy storage on the remaining flue gas according to the carbon dioxide demand of the liquid fuel preparation module.
12. The new energy driven carbon based renewable combustion cycle system of claim 1, wherein the liquid fuel is methanol;
the new energy driven carbon based renewable combustion cycle system further comprises:
a thermal decomposition module connected between the power generation unit of the carbon-based combined thermal power generation module that generates the power generation medium based on fuel combustion and the liquid fuel preparation module, and configured to thermally decompose at least a portion of the liquid fuel and the combustible byproduct before returning them to the power generation unit that generates the power generation medium based on fuel combustion; and
and the second waste heat reuse module is respectively connected with the liquid fuel preparation module and the thermal decomposition module, is configured to collect and store waste heat generated in the liquid fuel preparation process, and conveys the waste heat to the thermal decomposition module.
13. The new energy driven carbon-based renewable combustion cycle system of claim 1 further comprising:
and the byproduct storage and conveying module is respectively connected with the power generation unit generating the power generation working medium based on fuel combustion and the liquid fuel preparation module, is configured to store liquid and gaseous combustible byproducts generated in the liquid fuel preparation, and conveys the liquid and gaseous combustible byproducts to the power generation unit generating the power generation working medium based on fuel combustion of the carbon-based combined thermal power generation module.
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