CN217362588U - Alcohol-coal renewable combustion circulation system driven by new energy - Google Patents

Abstract

The utility model provides a new forms of energy driven mellow wine-coal combustion circulation system that can regenerate relates to energy cyclic utilization technical field. The system comprises a carbon-based combined thermal power generation module at least comprising a coal-fired steam turbine power generation unit, a new energy power generation module, a power transmission module, a flue gas treatment module, a carbon dioxide treatment module and a liquid fuel preparation module. The system can effectively recycle coal energy and new energy; the stable power is ensured by combining the thermal power and new energy matching, and the safety is high; the alcohol liquid fuel is prepared by using new energy and carbon dioxide discharged by combined thermal power as raw materials through water electrolysis, 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

Alcohol-coal renewable combustion circulation system driven by new energy

Technical Field

The utility model relates to an energy cyclic utilization technical field, especially a new forms of energy driven mellow wine-coal combustion circulation 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 fluctuation problem of new energy along with climate change is large; (2) no matter the fossil energy or new wind and light energy is abundant in the west and north regions, but is barren in the east and south regions, the distribution direction of the fossil energy and the new wind and light energy is just opposite to the distribution direction of economic activities, and long-distance transmission of energy is needed, but 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 alcohol-coal renewable combustion cycle system that overcomes, or at least partially solves, the above problems.

An object of the utility model is to provide a can effectively utilize coal energy and new forms of energy comprehensively, the security is high, greatly reduced carbon emission just reduces liquid fuel manufacturing cost's new forms of energy driven mellow wine-coal can regenerate combustion cycle system by a wide margin.

A further object of the utility model is to reduce the carbon capture cost.

The utility model discloses a further another aim at further improves thermoelectricity generating efficiency, practices thrift the investment and the running cost of carbon entrapment simultaneously.

In particular, according to an aspect of an embodiment of the present invention, there is provided a new energy driven alcohol-coal renewable combustion cycle system, including:

the carbon-based combined thermal power generation module at least comprises a coal-fired steam turbine power generation unit;

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 flue gas treatment module is connected with the carbon-based combined thermal power generation module and is configured to purify the carbon dioxide-containing flue gas discharged by the carbon-based combined thermal power generation module;

the gas input end of the carbon dioxide processing module is connected with the gas output end of the flue gas processing module, the carbon dioxide processing module is configured to process the purified flue gas to obtain carbon dioxide meeting the target requirement, and at least part of the carbon dioxide is provided for 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 alcohol liquid fuel by water electrolysis by using supplied carbon dioxide under the driving of the surplus power, and returns at least one part of the generated liquid fuel and combustible byproducts as fuel to at least one of power generation units which can generate power generation working medium through fuel combustion in the carbon-based combined thermal power generation module.

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 further comprises a gas turbine power generation unit; and is

The liquid fuel preparation module is connected to the gas turbine power generation unit in the carbon-based combined thermal power generation module 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 carbon dioxide treatment module comprises a carbon capture module comprising:

and the absorption tower and the desorption tower are connected with the flue gas treatment module and the liquid fuel preparation module respectively and are configured to absorb carbon dioxide in the purified flue gas through an absorbent and perform desorption under the action of heat energy to release the carbon dioxide absorbed by the absorbent.

Optionally, the carbon capture module further comprises:

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

The compression unit is configured to perform gaseous compression on the delivered carbon dioxide for carbon dioxide storage, and is further configured to deliver 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;

the carbon dioxide processing 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 alcohol-coal renewable combustion cycle system further comprises:

a waste heat reuse module respectively connected with the liquid fuel preparation module and the desorption tower, 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 carbon dioxide treatment module further comprises a storage unit configured to store the absorbent absorbed with carbon dioxide.

Optionally, the liquid fuel is methanol;

the liquid fuel preparation module includes:

the electrolytic hydrogen production unit is connected with the new energy power generation module and is configured to carry out water electrolysis under the driving of the surplus power so as to produce hydrogen; and

the methanol synthesis unit is respectively connected with the carbon dioxide treatment module, the electrolytic hydrogen production unit and the carbon-based combined thermal power generation module, and is configured to prepare methanol by using the hydrogen produced by the electrolytic hydrogen production unit and the carbon dioxide provided by the carbon dioxide treatment module;

alternatively, the first and second electrodes may be,

the liquid fuel preparation module includes:

and the electrolytic synthesis unit is respectively connected with the new energy power generation module, the carbon dioxide treatment module and the carbon-based combined thermal power generation module and is configured to simultaneously carry out water electrolysis and methanol synthesis reaction under the driving of the surplus power and the assistance of carbon dioxide.

Optionally, the new energy driven alcohol-coal 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 electrolytic hydrogen production unit or the electrolytic synthesis unit, and is configured to convey oxygen generated by the electrolytic hydrogen production unit or the electrolytic synthesis unit in the water electrolysis process to a power generation unit capable of generating power generation working media through fuel combustion in the carbon-based combined thermal power generation module for oxygen-enriched combustion.

Optionally, the combustible byproducts include liquid and gaseous combustible byproducts;

the new energy driven alcohol-coal renewable combustion cycle system further comprises:

a byproduct storage and delivery module, which is respectively connected to the carbon-based combined thermal power generation module and the liquid fuel preparation module, and is configured to store combustible byproducts generated in the liquid fuel preparation and deliver the combustible byproducts to at least one of the power generation units in the carbon-based combined thermal power generation module, which can generate power generation working media through fuel combustion; and

a thermal decomposition module coupled between the carbon-based cogeneration module and the byproduct storage and delivery module and configured to thermally decompose at least a portion of the liquid fuel and the combustible byproduct prior to returning them to at least one of the power generation units in the carbon-based cogeneration module that can generate a power generation working medium by combustion of the fuel.

The utility model provides an among the renewable combustion cycle system of new forms of energy driven alcohol-coal, electric power that thermal power module produced is united to the carbon back that will include coal-fired steam turbine power generation unit at least and new forms of energy electric power are as stable power output after according to certain proportion ratio, utilize the carbon dioxide that produces in surplus new forms of energy electric power and the carbon back joint thermal power module power generation process to carry out water electrolysis preparation alcohols liquid fuel such as methyl alcohol simultaneously, and at least partly and the combustible byproduct of the liquid fuel that will make return back carbon back and unite thermal power module and be used for the electricity generation with stable electric wire netting, thereby realize the renewable combustion cycle of alcohol-coal. The system can effectively recycle coal 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 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 alcohol-coal combustion cycle system that can regenerate, carbon entrapment is carried out to the carbon emission that unites thermoelectricity through absorption/desorption link to waste heat recovery in the liquid fuel preparation process is used for the desorption link of carbon entrapment, has reduced carbon entrapment cost, thereby improves whole efficiency.

Further, the utility model discloses an among the new forms of energy driven alcohol-coal combustion circulation system that can regenerate, supply for carbon group thermal power module jointly 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.

The above 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 according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

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 alcohol-coal renewable combustion cycle system according to an embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a new energy driven alcohol-coal renewable combustion cycle system according to another embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a new energy driven alcohol-coal renewable combustion cycle system according to yet another embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a new energy driven alcohol-coal 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 alcohol-coal 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 alcohol-coal renewable combustion cycle system according to yet another embodiment of the present invention;

fig. 7 shows a schematic diagram of a new energy driven alcohol-coal 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 present invention provides a new energy-driven alcohol-coal renewable combustion cycle system, which is described in detail below with reference to the accompanying drawings. 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 alcohol-coal renewable combustion cycle system 100 according to an embodiment of the present invention. Referring to fig. 1, a new energy driven alcohol-coal 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 flue gas treatment module 190, a carbon dioxide treatment 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 a coal-fired steam turbine power generation unit 112. The coal-fired turbine power generation unit 112 is fueled by coal, which is one of the current main energy sources, and may generally include a coal-fueled boiler, a turbine, and a generator, the operating principles of which are 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 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, the 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 end of the carbon-based combined thermal power generation module 110 is connected to the power input end 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 terminal of the new energy power generation module 120 is also connected to a power input terminal 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 a 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 flue gas treatment module 190 is connected to the carbon-based cogeneration module 110. Specifically, the gas input of the flue gas treatment module 190 is connected to the gas output of the carbon-based combined thermal power generation module 110. The flue gas treatment module 190 is configured to purify the flue gas containing carbon dioxide discharged from the carbon-based combined thermal power generation module 110. The cleaning treatment herein may include the necessary treatment of the flue gas discharged from the fossil power, including but not limited to desulfurization, denitration, dust removal, etc.

The carbon dioxide treatment module 140 is connected to the flue gas treatment module 190. Specifically, the gas output of the flue gas treatment module 190 is connected to the gas input of the carbon dioxide treatment module 140. The carbon dioxide processing module 140 processes the purified 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 at least one of the power generation units in the carbon-based combined thermal power generation module 110, which can generate the power generation working medium through fuel combustion. The liquid fuel preparation module 150 receives surplus power generated by the new energy power generation module 120, prepares liquid fuel by water electrolysis using supplied carbon dioxide under the drive of the surplus power, and returns at least a part of the generated liquid fuel and combustible byproducts as fuel to at least one of the power generation units in the carbon-based combined thermal power generation module 110 that can generate power generation working medium by fuel combustion. The remaining liquid fuel is then stored as a product output or may be piped to the intended user.

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 burnt in the power generation unit capable of generating the power generation working medium through fuel combustion can be current main energy such as coal, petroleum and natural gas, and can also be novel energy such as biomass and the like. For example, in some embodiments, the coal turbine power generation unit 112 can be used as the power generation unit that generates power generation working fluid by combustion of a fuel, in which case at least a portion of the liquid fuel and the combustible byproduct are returned to the coal turbine power generation unit 112 as fuel. Of course, in other embodiments, the carbon-based cogeneration module 110 may also include other power generation units that can generate power by burning fuel, such as 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. In this case, at least a part of the liquid fuel and the combustible by-products can be returned to at least one of the coal-fired steam turbine power generation unit 112 and other power generation units capable of generating power generation working medium by burning fuel, and the number of the power generation units to which the liquid fuel and the combustible by-products are returned and the distribution ratio between the power generation units can be set according to the actual application requirements, and the utility model discloses do not specifically limit this.

The liquid fuel may be an alcohol liquid fuel, such as methanol or the like. 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. In this case, the new energy driven alcohol-Coal Renewable Combustion Cycle system may be referred to simply as new energy driven MCRCC (Methanol-Coal Renewable Combustion Cycle) system.

The embodiment of the utility model provides an among the renewable combustion cycle system of new forms of energy driven alcohol-coal, electric power that thermal power module 110 produced is united to the carbon back that will include coal-fired steam turbine power generation unit 112 at least and new forms of energy electric power are as stabilized power output after according to certain proportion ratio, utilize the carbon dioxide that thermal power module 110 power generation in-process produced is united to surplus new forms of energy electric power and carbon back to carry out the water electrolysis and prepare alcohol liquid fuel such as methyl alcohol simultaneously, and the at least partly and the flammable accessory substance of the liquid fuel that will make return back carbon back that thermal power module 110 is united to the carbon back and be used for the electricity generation with stable electric wire netting, thereby realize the renewable combustion cycle of alcohol-coal. The system can effectively recycle coal 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 can recognize that the production cost of alcohol liquid fuel (such as methanol) is greatly increased along with the increase of selectivity requirement, and in the system, because the byproduct of alcohol liquid fuel (such as methanol) production can be conveniently burned off for power generation by the power generation unit capable of generating power generation working medium by fuel combustion in the carbon-based combined thermal power generation module 110, the requirement on selectivity is greatly reduced, i.e. high selectivity is not needed, so that the production cost of alcohol liquid fuel is greatly reduced, and meanwhile, the overall energy efficiency of the system is also greatly increased. In other words, the new energy-driven alcohol-coal renewable combustion cycle system 100 of the present invention can reduce the selectivity requirement of alcohol liquid fuel (such as methanol) synthesis, allow the generation of byproducts, allow low carbon dioxide conversion, and even allow the liquid fuel and combustible byproducts to safely return 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, and adding the flame retardant.

Fig. 2 shows a schematic diagram of a new energy driven alcohol-coal renewable combustion cycle system 100 according to another embodiment of the present invention.

Referring to FIG. 2, in some embodiments, the carbon-based combined cycle power module 110 may also include a gas turbine power generation unit 111. 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.

Fig. 3 shows a schematic diagram of a new energy driven alcohol-coal renewable combustion cycle system 100 according to yet another embodiment of the present invention.

Referring to fig. 3, in some embodiments, to facilitate recycling of the byproducts of the liquid fuel production, the new energy driven alcohol-coal 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 carbon-based combined thermal power generation module 110 (specifically, at least one of the power generation units in the carbon-based combined thermal power generation module 110, such as the gas turbine power generation unit 111, that can generate a power generation working medium through fuel combustion) and the liquid fuel preparation module 150, and is configured to store liquid and gaseous combustible byproducts generated in the liquid fuel preparation, and deliver the liquid and gaseous combustible byproducts to at least one of the power generation units in the carbon-based combined thermal power generation module 110, which can generate a power generation working medium through fuel combustion, so as to generate power or assist in power generation.

Fig. 4 to 7 respectively show schematic structural diagrams of a new energy driven alcohol-coal renewable combustion cycle system 100 according to a further embodiment of the present invention.

Referring to fig. 4-7, in some embodiments, the carbon dioxide treatment module 140 may include a carbon capture module 141 to collect carbon dioxide from the combined thermal power exhaust via a carbon capture stage.

Specifically, the carbon capture module 141 may include an absorption tower 1411a and a desorption tower 1411b connected in series, which are respectively connected to the flue gas treatment module 190 and the liquid fuel preparation module 150, and are respectively configured to absorb carbon dioxide in the purified flue gas by an absorbent, and perform desorption under the action 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 with 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, because the carbon dioxide is not required to be liquefied, and only the carbon dioxide is required 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 sources (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 formed by the absorbent and 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. 4-7, in some preferred embodiments, the new energy driven alcohol-coal renewable combustion cycle system 100 may further include a waste heat reuse module 160 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. Waste heat reuse module 160 may employ existing waste heat recovery techniques, such as phase change heat storage materials and the like.

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. 4 and 6, 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. The hydrogen electrolysis unit 151 is connected to the new energy power generation module 120, and specifically, a power input end of the hydrogen electrolysis unit 151 is connected to another power output end of the new energy power generation module 120 to receive the surplus power output by the 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 to the carbon dioxide processing module 140, the electrolytic hydrogen production unit 151, and the carbon-based combined thermal power generation module (specifically, at least one of the power generation units in the carbon-based combined thermal power generation module 110, such as the gas turbine power generation unit 111, which can generate a power generation working medium through fuel combustion), specifically, a gas input end of the methanol synthesis unit 152 is respectively connected to a gas output end of the carbon dioxide processing module 140 and a hydrogen output end of the electrolytic hydrogen production unit 151, and a product output end is connected to a fuel input end of the power generation unit in the carbon-based combined thermal power generation module 110, which can generate a power generation working medium through fuel combustion. 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 waste heat reuse module 160 may be thermally connected to the electrolytic hydrogen production unit 151 and the methanol synthesis unit 152, respectively, so as to collect and store the waste heat generated by them, which is recovered for carbon dioxide desorption in the carbon capture stage.

In other embodiments, referring to fig. 5 and 7, 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. 4-7, in some embodiments, the new energy driven alcohol-coal renewable combustion cycle system 100 may also include an oxycombustion supply line 170, represented in the figures by a gray heavy solid line. The oxycombustion supply line 170 connects the carbon-based combined thermal 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 water electrolysis to the carbon-based combined thermal 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. Moreover, the gas outlet end of the oxygen-enriched combustion supply pipeline 170 can be respectively connected with all power generation units in the carbon-based combined thermal power generation module 110, which can generate power generation working medium through fuel combustion. For example, in the case where the carbon-based cogeneration module 110 includes the coal-fired turbine power generation unit 112 and the gas turbine power generation unit 111, the outlet end of the oxyfuel combustion supply line 170 is connected to the gas turbine power generation unit 111 and the coal-fired turbine power generation unit 112, respectively, and supplies oxygen thereto according to 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. 4-7, in some embodiments, the new energy driven alcohol-coal renewable combustion cycle system 100 may further include a thermal decomposition module 180 coupled between the carbon-based co-fired power generation module 110 (specifically, at least one of the power generation units in the carbon-based co-fired power generation module 110 that may generate power generation fluid via fuel combustion, such as the gas turbine power generation unit 111) and the liquid fuel preparation module 150. When the byproduct storage and delivery module 191 is present in the alcohol-coal renewable combustion cycle system 100 driven by new energy, the thermal decomposition module 180 is connected between the carbon-based cogeneration module 110 (specifically, at least one of the power generation units in the carbon-based cogeneration module 110, such as the gas turbine power generation unit 111, that can generate a power generation medium by combustion of fuel) and the byproduct storage and delivery module 191. The thermal decomposition module 180 is configured to thermally decompose at least a portion of the liquid fuel (e.g., methanol) and the combustible byproduct before returning them to at least one of the power generation units in the carbon-based cogeneration module 110 that can generate the power generation medium through combustion of the fuel, increasing the heating value, thereby improving the combustion efficiency of the power generation units 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, referring to fig. 6 and 7, in some embodiments, the thermal output of the waste heat reuse module 160 may also be connected to the thermal decomposition module 180, such that the recovered waste heat may also be delivered to the thermal decomposition module 180 for thermal decomposition of the returned liquid fuel and combustible byproducts, as needed, thereby improving the energy utilization efficiency of the overall system.

The above introduces the alcohol-coal renewable combustion circulation scheme realized by combining thermal power with carbon capture and liquid fuel preparation driven by new energy, and the following explains the emission reduction performance of the new energy driven alcohol-coal renewable combustion circulation system 100 of the present invention by taking the alcohol-coal combined thermal power generated by taking coal and methanol as fuels (i.e., the carbon-based combined thermal power generation module 110 is composed of the gas turbine power generation unit 111 taking methanol as fuel and the coal-fired turbine power generation unit 112 taking coal as fuel) as an example. For convenience, the carbon-based cogeneration module 110 composed of the gas turbine power generation unit 111 and the coal-fired turbine power generation unit 112 is not referred to as an alcohol-coal thermal power plant.

In 2019, the coal-fired power consumption of China is about 5 trillion degrees, gasoline consumption is 1.2 million tons, and diesel oil consumption is 1.8 million tons, so that the produced carbon dioxide amounts are about 40 million tons, 3.5 million tons and 5.2 million tons respectively, and the total amount of carbon dioxide is about 48.7 million tons. Use aforementioned 2019 year data as the reference, if adopt the utility model discloses a new forms of energy driven alcohol-coal can regenerate combustion cycle system 100 satisfies above-mentioned energy resource consumption, and the efficiency of the first conservative setting carbon entrapment is 70%, then the implementation is: the coal-fired power was reduced to 1.5 trillion degrees, which produced about 12 million tons of carbon dioxide. About 6 million tons of methanol are combusted on site in the alcohol-coal thermal power plant to generate electricity, and the conservative setting of the gas-turbine combined cycle power generation efficiency is 35 percent, so that about 1.1 trillion-degree electricity is generated. Thus, the alcohol-coal fired power plant can output 2.6 trillion degrees of electricity in total. By proportioning new energy electricity in a ratio of 1:1, 5.2 trillion-degree electricity can be output in total, so that the requirement of 5 trillion-degree electricity is met.

In order to replace 1.2 million tons of gasoline and 1.8 million tons of diesel oil, 8 million tons of carbon dioxide generated by coal-fired thermal power are collected to prepare about 6 million tons of methanol, and the heat value of the 6 million tons of methanol can comprehensively replace 1.2 million tons of gasoline and 1.8 million tons of diesel oil.

Thus, the net carbon emissions ultimately to the atmosphere from this system are only 12 million tons from coal-fired fossil power (with 8 million tons producing methanol to replace gasoline, diesel, and discharged after combustion), and about 2.5 million tons of carbon dioxide that methanol leaks off the carbon capture after fossil power combustion, for a total emission of 14.5 million tons. Compared with the carbon emission of 48.7 million tons in China in 2019, the emission reduction reaches 34.2 million tons, and the emission reduction amplitude reaches 70 percent. Meanwhile, the total amount of 12 billion tons of methanol used for power generation and gasoline and diesel oil replacement is produced, and 2.5 trillion degrees of new energy electricity is matched with alcohol-coal fire electricity, the total amount of the required new energy is about 15 trillion degrees, and the developable reserves of wind power resources and/or solar energy resources in China can be completely met.

According to any one or combination of a plurality of the above-mentioned optional embodiments, the embodiment of the present invention can achieve the following beneficial effects:

the utility model provides an among the renewable combustion cycle system of new forms of energy driven alcohol-coal, electric power that thermal power module produced is united to the carbon back that will include coal-fired steam turbine power generation unit at least and new forms of energy electric power are as stable power output after according to certain proportion ratio, utilize the carbon dioxide that produces in surplus new forms of energy electric power and the carbon back joint thermal power module power generation process to carry out water electrolysis preparation alcohols liquid fuel such as methyl alcohol simultaneously, and at least partly and the combustible byproduct of the liquid fuel that will make return back carbon back and unite thermal power module and be used for the electricity generation with stable electric wire netting, thereby realize the renewable combustion cycle of alcohol-coal. The system can effectively recycle coal 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 alcohol-coal combustion cycle system that can regenerate, carbon entrapment is carried out to the carbon emission that unites thermoelectricity through absorption/desorption link to waste heat recovery in the liquid fuel preparation process is used for the desorption link of carbon entrapment, has reduced carbon entrapment cost, thereby improves whole efficiency.

Further, the utility model discloses an among the new forms of energy driven alcohol-coal combustion circulation system that can regenerate, supply for carbon group thermal power module jointly 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.

Further, the utility model discloses an among the new forms of energy driven alcohol-coal renewable combustion circulation system, need not carry out direct storage to electricity and hydrogen, but replace the convenient storage of carbon dioxide, heat, methyl alcohol, realize from this that the new forms of energy saves in different stages, strengthened stability and security. Meanwhile, the compressed storage of the carbon dioxide can have the function of energy storage.

Further, in the alcohol-coal renewable combustion circulation system driven by new energy, hydrogen liquefaction and carbon dioxide liquefaction are not needed, a large amount of electric power required by the alcohol-coal renewable combustion circulation system is omitted, and the running cost of the system is reduced.

Furthermore, the new energy driven alcohol-coal renewable combustion circulation system of the utility model does not involve complex material synthesis in operation, does not introduce a large amount of pollution, and has excellent environmental protection performance.

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 (10)

1. A new energy driven alcohol-coal renewable combustion cycle system comprising:

the carbon-based combined thermal power generation module at least comprises a coal-fired steam turbine power generation unit;

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 flue gas treatment module is connected with the carbon-based combined thermal power generation module and is configured to purify the carbon dioxide-containing flue gas discharged by the carbon-based combined thermal power generation module;

the gas input end of the carbon dioxide processing module is connected with the gas output end of the flue gas processing module, the carbon dioxide processing module is configured to process the purified flue gas to obtain carbon dioxide meeting the target requirement, and at least part of the carbon dioxide is provided for 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 alcohol liquid fuel by water electrolysis by using supplied carbon dioxide under the driving of the surplus power, and returns at least one part of the generated liquid fuel and combustible byproducts as fuel to at least one of power generation units which can generate power generation working medium through fuel combustion in the carbon-based combined thermal power generation module.

2. The new energy driven alcohol-coal 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 alcohol-coal renewable combustion cycle system of claim 1, wherein the carbon-based combined thermal power generation module further comprises a gas turbine power generation unit; and is

The liquid fuel preparation module is connected to the gas turbine power generation unit in the carbon-based combined thermal power generation module to return at least a portion of the produced liquid fuel and combustible byproducts as fuel to the gas turbine power generation unit.

4. The new energy driven alcohol-coal renewable combustion cycle system of claim 1, wherein the carbon dioxide processing module comprises a carbon capture module comprising:

the absorption tower and the desorption tower are connected with the flue gas treatment module and the liquid fuel preparation module in sequence, and are respectively configured to absorb carbon dioxide in the purified flue gas through an absorbent and perform desorption under the action of heat energy to release the carbon dioxide absorbed by the absorbent.

5. The new energy driven alcohol-coal renewable combustion cycle system of claim 4, wherein the carbon capture module further comprises:

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

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;

the carbon dioxide processing 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.

6. The new energy driven alcohol-coal renewable combustion cycle system as set forth in claim 4 or 5, further comprising:

a waste heat reuse module respectively connected with the liquid fuel preparation module and the desorption tower, 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.

7. The new energy driven alcohol-coal renewable combustion cycle system as in claim 4 or 5, wherein the carbon dioxide treatment module further comprises a storage unit configured to store the absorbent having absorbed carbon dioxide.

8. The new energy driven alcohol-coal renewable combustion cycle system of claim 1 wherein the liquid fuel is methanol;

the liquid fuel preparation module includes:

the electrolytic hydrogen production unit is connected with the new energy power generation module and is configured to carry out water electrolysis under the driving of the surplus power so as to produce hydrogen; and

the methanol synthesis unit is respectively connected with the carbon dioxide treatment module, the electrolytic hydrogen production unit and the carbon-based combined thermal power generation module and is configured to prepare methanol by using the hydrogen produced by the electrolytic hydrogen production unit and the carbon dioxide provided by the carbon dioxide treatment module;

alternatively, the first and second electrodes may be,

the liquid fuel preparation module includes:

and the electrolytic synthesis unit is respectively connected with the new energy power generation module, the carbon dioxide treatment module and the carbon-based combined thermal power generation module and is configured to simultaneously carry out water electrolysis and methanol synthesis reaction under the driving of the surplus power and the assistance of carbon dioxide.

9. The new energy driven alcohol-coal renewable combustion cycle system of claim 8, further comprising:

and the oxygen-enriched combustion supply pipeline is connected with the carbon-based combined thermal power generation module and the electrolytic hydrogen production unit or the electrolytic synthesis unit, and is configured to convey oxygen generated by the electrolytic hydrogen production unit or the electrolytic synthesis unit in the water electrolysis process to a power generation unit capable of generating power generation working media through fuel combustion in the carbon-based combined thermal power generation module for oxygen-enriched combustion.

10. The new energy driven alcohol-coal renewable combustion cycle system of claim 1, wherein the combustible byproducts include liquid and gaseous combustible byproducts;

the new energy driven alcohol-coal renewable combustion cycle system further comprises:

a byproduct storage and delivery module, which is respectively connected to the carbon-based combined thermal power generation module and the liquid fuel preparation module, and is configured to store combustible byproducts generated in the liquid fuel preparation and deliver the combustible byproducts to at least one of the power generation units in the carbon-based combined thermal power generation module, which can generate power generation working media through fuel combustion; and

a thermal decomposition module coupled between the carbon-based cogeneration module and the byproduct storage and delivery module and configured to thermally decompose at least a portion of the liquid fuel and the combustible byproduct prior to returning them to at least one of the power generation units in the carbon-based cogeneration module that can generate a power generation working medium by combustion of the fuel.

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