CN113739615A - Waste heat recycling system for high-temperature power generation - Google Patents
Waste heat recycling system for high-temperature power generation Download PDFInfo
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- CN113739615A CN113739615A CN202111147071.0A CN202111147071A CN113739615A CN 113739615 A CN113739615 A CN 113739615A CN 202111147071 A CN202111147071 A CN 202111147071A CN 113739615 A CN113739615 A CN 113739615A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a waste heat recycling system for high-temperature power generation, which comprises a power generator, a heat exchanger A, an air input pipeline, a fuel input pipeline and a high-temperature tail gas output pipeline, wherein the air input pipeline and the fuel input pipeline are respectively connected with the heat exchanger A; two ends of the high-temperature tail gas output pipeline are respectively connected with the generator and the heat exchanger A, and the heat exchanger A is connected with the low-temperature tail gas carbon collection and recovery pipeline; and tail gas generated by the generator is connected with the heat exchanger A through a high-temperature tail gas output pipeline, and the tail gas output after heat exchange of the heat exchanger A is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use. This system collects electricity generation, high temperature steam, carbon and utilizes in an organic whole, through waste heat multipurpose recycle, has solved traditional waste heat utilization inadequately or heat utilization and can not match with the ability ingeniously, can promote the reproducibility strong.
Description
Technical Field
The invention belongs to the technical field of high-temperature power generation, and particularly relates to a waste heat recycling system for high-temperature power generation.
Background
High-temperature power generation systems generally include fuel gas turbine systems, coal-fired steam turbine systems, hybrid steam and gas turbine power generation systems, high-temperature fuel cell systems, and the like. The high-temperature power generation system is a high-temperature power generation system and the like which needs to continuously supply gaseous or liquid fuel to a power generator and continuously discharge high-temperature tail gas or tail liquid. The following description focuses on a high temperature fuel cell.
A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and is also called an electrochemical generator. It is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation. The fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through electrochemical reaction, and is not limited by the Carnot cycle effect, so the efficiency is high; in addition, fuel and oxygen are used as raw materials for the fuel cell, and mechanical transmission parts are not arranged, so that the discharged harmful gas is extremely little, and the service life is long. Therefore, from the viewpoint of energy conservation and ecological environment protection, fuel cells are promising power generation technologies.
The fuel cell has the advantages that the power generation efficiency is high (the product power generation efficiency of the fuel cell reaches 74% reported by Elcogen company in Europe, and the stable power generation efficiency of the product of ENE FARM Type S of Osaka fuel gas company in Japan is 55%), and the comprehensive energy utilization efficiency of the cogeneration is also high (more than 87%). Taking the solid oxide fuel cell power generation system as an example, the operation temperature of the stack is as high as 650 ℃ or higher, and generally between 700 ℃ and 800 ℃. At such a high operation temperature, the temperature of the tail gas of the reacted system is usually higher, and a common technical route is that the tail gas is subjected to heat exchange with cooling water on the secondary side, so that the tail gas is cooled, and high-temperature hot steam is prevented from directly diffusing into the atmosphere to cause thermal pollution; and secondly, the purpose of heating cold water into hot water is achieved, so that hot water, winter heating and the like are provided for users.
Nowadays, with the development of hydrogen energy strategies in various countries, countries in the daily, European and American countries have a vigorous development trend of using fuel cell-based cogeneration for vehicles and households, distributed cogeneration for industry and commerce and the like. The use of advanced fuel cell technologies such as PAFC (phosphate fuel cell), PEM (proton exchange membrane fuel cell) and SOFC (solid oxide fuel cell) has reached new peaks in the last decade. The normal operation temperature of the fuel cell, especially the solid oxide fuel cell, is higher, and the fuel cell is suitable for the field of combined heat and power. When the generated power is fixed, the release of thermal energy is also substantially fixed, whereas the demand for thermal energy on the user side is not fixed. Such as in the fields requiring hot water, hot steam, heating, etc. Often, with the difference of different seasons and different time points, the user-side demand also shows a large difference. The method is mainly applied to mismatching of the demand of water at the side of a user and the heat supply of a fuel cell, for example, through initial calculation, for a 900W household fuel cell thermoelectric system, the heat supply is often larger than the demand of the user, so that the heat supply is excessive particularly in summer, the actual comprehensive utilization efficiency is not expected, and certain heat energy waste is caused. It is very important how to make full use of the waste heat of the high-temperature power generation system with more waste heat.
Therefore, based on sustainable development, the need of reducing carbon dioxide emission is reduced, and how to reasonably utilize a large amount of waste heat energy generated by the high-temperature power generation system becomes a research focus.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides a waste heat recycling system for high temperature power generation, which skillfully solves the problems of insufficient waste heat utilization or unmatched heat utilization and energy utilization through a waste heat multipurpose utilization mode of a fuel cell power generation system. The system can be used for recycling waste heat of a power generation system, has important significance in recycling waste heat of high-temperature power generation, and can be widely applied to multi-direction and multi-channel energy supply of household, industrial and commercial and agricultural systems.
The invention adopts the following technical scheme: the waste heat recycling system for high-temperature power generation comprises a power generator, a heat exchanger A, an air input pipeline, a fuel input pipeline and a high-temperature tail gas output pipeline, wherein the power generator, the heat exchanger A, the air input pipeline, the fuel input pipeline and the high-temperature tail gas output pipeline are connected in series, and the high-temperature tail gas output pipeline is connected with the power generator
The air input pipeline and the fuel input pipeline are respectively connected with a heat exchanger A, the heat exchanger A is connected with the generator, and air and fuel conveyed by the air input pipeline and the fuel input pipeline are input into the generator to generate electricity after passing through the heat exchanger;
the two ends of the high-temperature tail gas output pipeline are respectively connected with the generator and the heat exchanger A, and the output end of the heat exchanger A is connected with the low-temperature tail gas carbon collection and recovery pipeline; the tail gas generated after the power generator generates power is connected with the heat exchanger A through a high-temperature tail gas output pipeline, and the tail gas output after heat exchange of the heat exchanger A is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use.
The system preheats the normal-temperature fuel and the normal-temperature oxygen (or normal-temperature air containing oxygen) entering the generator or the power generation system by utilizing the high-temperature tail gas of the generator (or the power generation device).
Further, the air input pipeline and the fuel input pipeline are also directly connected with the input end of the generator.
The reformer is further included, and the output end of the heat exchanger A, the reformer and the input end of the generator are connected through a fuel input pipeline.
Furthermore, an intelligent regulating valve is arranged on a high-temperature tail gas output pipeline connected between the generator and the heat exchanger A, the intelligent regulating valve is also connected with the heat exchanger B, and tail gas output after heat exchange of the heat exchanger B is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use.
Furthermore, the input end of the heat exchanger B is also communicated with a cold water pipeline, and hot water is output through a hot water pipeline after heat exchange of the heat exchanger B for users to use.
Furthermore, a temperature measuring instrument and a flow meter are arranged on the cold water pipeline.
Furthermore, a flowmeter or a thermodetector is arranged on the hot water pipeline.
Furthermore, the hot water output by the hot water pipeline is stored in a water tank; and/or the hot water output by the hot water pipeline is connected with a reheater, and is heated by the reheater to output heating.
Further, a flow meter and/or a temperature measuring instrument are arranged on the air input pipeline or the fuel input pipeline.
Further, the air input pipeline connected with the heat exchanger A is connected with an air pump.
Furthermore, the heat exchanger A adopts a concentric annular multilayer structure, tail gas generated after power generation of the generator is positioned in the middle layer, and normal-temperature air and normal-temperature fuel input by the air input pipeline and the fuel input pipeline are positioned in adjacent layers close to the middle layer.
By adopting the technical scheme of the invention, the invention has the beneficial effects that: the system has the core that the system integrates power generation, high-temperature steam and carbon collection and utilization, and skillfully solves the problems of insufficient utilization of the traditional waste heat or mismatching of heat utilization and energy utilization through a waste heat multipurpose recycling mode of the system, can be widely used for a power generation system, and has strong popularization and reproducibility; through reasonable design, the tail gas of the high-temperature power generation system can be utilized in a multi-stage gradient manner, intelligent control is performed on the premise of mastering and establishing the design operation range and the demand range of each system device, and the efficiency maximization of the system energy utilization is realized.
Drawings
Fig. 1 is a schematic flow diagram of a waste heat recycling system for high temperature power generation according to the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings, so that the technical solutions can be more clearly and clearly understood. Other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The embodiment relates to a waste heat recycling system for high-temperature power generation, which mainly comprises a power generator (power generation equipment), a heat exchanger A, a heat exchanger B, a reheater, an air input pipeline, a fuel input pipeline, a high-temperature tail gas output pipeline, a low-temperature tail gas carbon collection and recovery pipeline (containing carbon), peripheral control equipment (such as intelligent control equipment of a computer or single or multiple intelligent control equipment formed by a network) and the like as shown in figure 1, so that a set of complete power generation, high-temperature steam waste heat utilization and carbon collection and recovery system is constructed, and the system has the advantages of flexible operation mode, wide operation scene and the like.
The air input pipeline and the fuel input pipeline are respectively connected with a heat exchanger A, and the heat exchanger A is connected with the generator. Or the air input pipeline and the fuel input pipeline are directly connected with the input end of the generator. And the air and the fuel conveyed by the air input pipeline and the fuel input pipeline are input into the generator to generate electricity after passing through the heat exchanger.
The two ends of the high-temperature tail gas output pipeline are respectively connected with the generator and the heat exchanger A, and the output end of the heat exchanger A is connected with the low-temperature tail gas carbon collection and recovery pipeline; the tail gas generated after the power generator generates power is connected with the heat exchanger A through the high-temperature tail gas output pipeline, and the tail gas output after the heat exchange of the heat exchanger A is output through the low-temperature tail gas carbon collecting and recycling pipeline for users to use, such as greenhouse gas fertilizer, drying, cooking and the like.
The output end of the heat exchanger A, the reformer and the input end of the generator are connected through a fuel input pipeline. An intelligent regulating valve is arranged on a high-temperature tail gas output pipeline connected between the generator and the heat exchanger A, the intelligent regulating valve is also connected with the heat exchanger B, and tail gas output after heat exchange of the heat exchanger B is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use. The input end of the heat exchanger B is also communicated with a cold water pipeline, and hot water is output through a hot water pipeline for users to use after heat exchange is carried out by the heat exchanger B. The heat energy can be used for hot water storage in the water tank or used for heating residents as heat energy.
The main waste heat utilization mode of the system is as follows: the tail gas generated by the generator is used for preheating fuel gas and oxidizing gas (such as pure oxygen, air containing oxygen and the like). The details are as follows.
1. Because the generator needs to operate at high temperature (600-. The heat generated by the reaction of the generator is usually not sufficient to maintain the operating temperature, so the generator needs to be heated intermittently by the heat generated by the combustion of the fuel gas, thereby ensuring the high-temperature operating environment. In order to improve the overall heat utilization efficiency, the fuel gas and the oxidizing gas (air) can be preheated before entering the generator by preheating the tail gas to enter the fuel gas, the oxidizing gas (air) and the like of the power generation system. The reduction of the temperature of the generator after the normal-temperature fuel gas and the normal-temperature oxidizing gas enter the generator is reduced, so that the overall energy utilization rate of the system is improved;
2. the tail gas of the high-temperature generator is usually a high-temperature heat source, and the tail gas of the high-temperature generator is generally supplied with external heat in a heat exchange mode, for example, cold water (such as tap water) is introduced, and the tail gas exchanges heat with the high-temperature tail gas through a heat exchanger, so that the cold water is changed into hot water for household use. If the hot water quantity fully meets the user requirement, when cold water is not required to be heated continuously, intelligent adjustment can be carried out on the part of tail gas under the control of the tail gas adjusting valve. The direct method is to lead the tail gas to another channel in a large flow rate, enter the gas path supply side of the power generation system, and exchange heat with the normal temperature air and the fuel gas to realize the preheating of the fuel gas and the air.
By the ingenious design, the heat energy of the high-temperature tail gas of the original generator system is fully utilized. And when the user uses the combined heat and power function, the use can be intelligently adjusted. When satisfying basic heat supply demand, increased the waste heat utilization mode, promoted whole energy efficiency.
Other multipurpose modes of waste heat utilization of the system are as follows: the tail gas of the high-temperature waste heat is not directly exhausted after being output, and is coupled with the high-temperature steam pot to provide a cooking function; and (3) providing and drying: clothes drying/food drying/medicine drying/chemical substance drying and the like; supplying heat, carbon dioxide and the like to the greenhouse; providing a heat source for a high temperature carbon collection system, etc.
The generator in the system can adopt various high-temperature fuel cell generators (such as a high-temperature solid oxide fuel cell power generation system and the like). It typically requires fuel (gaseous or liquid) input, an oxidizer (such as oxygen or fuel input), and output including electricity, high temperature tail gas, etc.
The heat exchanger A adopts a heat exchanger with three-side heat exchange function, and has the main function of exchanging the heat of the tail gas at the middle side to cold sources at the inner side and the outer side through the annular heat exchanger by using the high-temperature hot tail gas or tail liquid generated by the generator. The heat sink includes a normal temperature fuel gas flowing inside the annular heat exchanger and a normal temperature oxidizing gas (generally air or oxygen) flowing outside the annular heat exchanger. The device is mainly used for supplying fuel gas and oxygen by the heat of high-temperature tail gas to realize preheating of the fuel gas and air before entering a power generation device.
The embodiment provides a heat exchanger A with an optimal structure, and the annular multilayer structure adopting the concentric design is mainly designed into three layers because the three-side heat exchange is carried out on fuel and air by utilizing tail gas, the middle layer is used as a tail gas channel, the air and the fuel are positioned at the outermost layer and the innermost layer, and the inner layer and the outer layer are heated by utilizing the heat of the middle layer.
The heat exchanger B is a conventional mature heat exchanger, and has the main function of exchanging heat of the high-temperature hot tail gas or tail liquid generated by the power generation equipment to a cold source on the secondary side of the heat exchanger through heat exchange. The heat of the high-temperature tail gas is supplied to cold water input from the outside, so that the cold water is heated, and functions of providing hot water for a user side, warming and the like are realized.
The system uses two heat exchangers, the heat exchangers A and B can be mutually standby, and when one heat exchanger fails, the complete cooling function can be provided through the other heat exchanger. For example, when the heat exchanger B fails, the heat exchanger a is put into use, and the cooling (mainly air cooling) of the tail gas can be realized by increasing the air flow rate, but the heat exchanger a also needs to be properly adjusted according to the requirement for the downstream high-temperature tail gas. The user will not get hot water if heat exchanger B fails.
The reheater is a small burner, and when heating is required in winter but the amount of hot water is insufficient, fuel gas is supplied from a fuel inlet to ignite and burn. An ignition needle is arranged inside. The reheater needs to be equipped with fuel gas and air input pipes to further heat the hot water.
An air input pipe, which is generally provided with an air pump; and configures an intelligent control device (e.g., via a computer or network, etc.) to control the amount of intake air.
The fuel input pipeline can input various non-carbon-containing fuels such as hydrogen gas, carbon-containing gaseous fuel, liquid fuel and the like, and if the non-carbon-containing fuels are carbon gaseous fuel and liquid fuel, a reformer can be added to be used as reformed fuel to enter the power generation equipment.
The reformer, which is arranged between the heat exchanger A and the generator, means that the fuel needs to be preheated and then enters the reformer and finally enters the generator (device). In a fuel cell generator, the hydrogen required by the stack is typically produced from the reformer.
The high-temperature steam output pipeline outputs tail gas waste heat which is mainly divided into two parts for recycling:
(a) and (3) high-temperature waste heat utilization: high temperature steam can be connected for cooking: a high-temperature steam boiler; drying: laundry/food drying; drying medicinal materials, drying chemicals and the like. Where the steam needs to be filtered if it is in direct contact with food, etc.
(b) The low-temperature (carbon-containing) tail gas carbon collection and recovery application comprises the following steps: the carbon is output through a low-temperature tail gas carbon collecting and recycling pipeline and is supplied to greenhouse gas fertilizers, temperature supply and the like. If the power generation equipment adopts carbon-containing fuel, the tail gas contains carbon dioxide, part of low-temperature waste heat, water vapor and the like, and the condensed tail gas and the like can be introduced into a farm to supply heat and CO2 to a greenhouse. A methane tank is arranged beside the greenhouse, and the methane can be introduced into a power generation system for recycling. And the negative carbon cycle of the whole system is realized. The high-temperature steam condensate water after being cooled and used can be merged into a tail gas condensation pipeline for further recycling.
Peripheral control equipment, this system adopt full intelligent control, all set up intelligent flowmeter, intelligent thermometer in each pipeline, and the signal that intelligent flowmeter, intelligent thermometer etc. gathered passes through wireless network transmission to controlgear and carries out intelligent control.
The system comprises a plurality of operation modes:
power generation + heat supply (only hot water supply) + preheated gas/air: in a normal operation mode, the control system grasps the water outlet temperature and the water outlet flow of the hot water tank, and the system pre-distributes the exhaust flow on the premise of meeting the temperature and the water amount set by a user. Thereby realizing the rest tail gas to fuel gas/air. The waste heat of the tail gas of the system is fully utilized. In the operation mode, the generator basically does not need to be heated additionally, the self-heating of the system is enough to maintain the high-temperature environment required by power generation, the air inlet valve for regulating air can regulate the operation temperature of the pile, and the waste heat loss of the system only comprises the heat loss of the generator heat-insulating material, the pipeline air flue heat-insulating material and the water tank heat-insulating material, which is difficult to avoid. The overall thermoelectric comprehensive utilization efficiency of the system can be predicted to be more than 95%;
(II) power generation + heat supply (only hot water supply) + preheating gas/air + high-temperature steam (cooking/drying): the tail gas is further utilized by waste heat, so that the overall thermoelectric comprehensive utilization efficiency of the system is further improved;
(III) power generation + heat supply (only hot water supply): the mode is suitable for the condition that the demand for hot water is large and also suitable for the condition that the heat exchanger A fails;
(IV) power generation, heat supply and heating: this mode is suitable for winter;
(V) emergency: power generation + water supply (small amount of condensed water), where the system is used in emergency situations, such as open use without a cold water source, cooled by air. The condensed water in emergency can be used for other purposes (can be used as drinking water after being connected with a filter).
The system can be widely used for a power generation system and has strong popularization and reproducibility. The system is reasonable in design, tail gas of the high-temperature power generation system can be utilized in a multi-stage gradient mode, intelligent control is conducted on the premise that the design operation range and the demand range of each system device are mastered and set through the intelligent control system, and efficiency maximization of system energy utilization is achieved. Meanwhile, an emergency operation mode is also designed. The system has flexible operation mode and wide operation scene.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The waste heat recycling system for high-temperature power generation is characterized by comprising a power generator, a heat exchanger A, an air input pipeline, a fuel input pipeline and a high-temperature tail gas output pipeline, wherein the air input pipeline and the fuel input pipeline are respectively connected with the heat exchanger A, the heat exchanger A is connected with the power generator, and air and fuel conveyed by the air input pipeline and the fuel input pipeline are input into the power generator to generate power after passing through the heat exchanger;
the two ends of the high-temperature tail gas output pipeline are respectively connected with the generator and the heat exchanger A, and the output end of the heat exchanger A is connected with the low-temperature tail gas carbon collection and recovery pipeline; the tail gas generated after the power generator generates power is connected with the heat exchanger A through a high-temperature tail gas output pipeline, and the tail gas output after heat exchange of the heat exchanger A is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use.
2. The system for recycling waste heat from high temperature power generation of claim 1, wherein the air input pipe and the fuel input pipe are also directly connected to the input end of the generator.
3. The system for recycling waste heat generated in high temperature power generation according to claim 1, further comprising a reformer, wherein the output end of the heat exchanger A, the reformer and the input end of the power generator are connected through a fuel input pipeline.
4. The system for recycling the waste heat generated by the high-temperature power generation according to any one of claims 1 to 3, wherein an intelligent regulating valve is arranged on a high-temperature tail gas output pipeline connected between the power generator and the heat exchanger A, the intelligent regulating valve is further connected with the heat exchanger B, and the tail gas output after heat exchange of the heat exchanger B is output through a low-temperature tail gas carbon collecting and recycling pipeline for users to use.
5. The waste heat recycling system for high temperature power generation according to claim 4, wherein the input end of the heat exchanger B is further communicated with a cold water pipeline, and hot water is output through a hot water pipeline for users to use after heat exchange is performed by the heat exchanger B.
6. The waste heat recycling system for high temperature power generation according to claim 5, wherein a temperature measuring instrument and a flow meter are provided on the cold water pipe.
7. The waste heat recycling system for high temperature power generation according to claim 5, wherein a flow meter or a temperature measuring instrument is provided on the hot water pipe.
8. The waste heat recycling system for high temperature power generation according to claim 5, wherein the hot water output from the hot water pipeline is stored in a water tank; and/or the hot water output by the hot water pipeline is connected with a reheater, and is heated by the reheater to output heating.
9. The system for recycling waste heat from high temperature power generation according to any one of claims 1 to 3, wherein a flow meter and/or temperature measurement is provided on the air input pipe or the fuel input pipe
Measuring; or the air input pipeline connected with the heat exchanger A is connected with an air pump.
10. The system for recycling the waste heat generated in the high-temperature power generation according to any one of claims 1 to 3, wherein the heat exchanger A has a concentric annular multilayer structure, the generator generates tail gas in the middle layer after power generation, and the air input pipeline and the fuel input pipeline input normal-temperature air and normal-temperature fuel are located in adjacent layers close to the middle layer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036529A (en) * | 2022-07-26 | 2022-09-09 | 重庆科技学院 | Solid oxide fuel cell heat energy utilization and management system and working method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036529A (en) * | 2022-07-26 | 2022-09-09 | 重庆科技学院 | Solid oxide fuel cell heat energy utilization and management system and working method |
| CN115036529B (en) * | 2022-07-26 | 2023-11-10 | 重庆科技学院 | Heat energy utilization and management system of solid oxide fuel cell and working method |
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