CN113091052B - Catalytic combustion ignition starting device and method utilizing thermochemical heat storage - Google Patents

Catalytic combustion ignition starting device and method utilizing thermochemical heat storage Download PDF

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CN113091052B
CN113091052B CN202110458861.4A CN202110458861A CN113091052B CN 113091052 B CN113091052 B CN 113091052B CN 202110458861 A CN202110458861 A CN 202110458861A CN 113091052 B CN113091052 B CN 113091052B
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heat storage
catalytic combustion
heat
thermochemical
reaction
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CN113091052A (en
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鲍泽威
陈昱江
王健礼
李象远
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Sichuan University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
    • F23C13/02—Apparatus in which combustion takes place in the presence of catalytic material characterised by arrangements for starting the operation, e.g. for heating the catalytic material to operating temperature
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
    • 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
    • Y02E60/14—Thermal energy storage

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)

Abstract

A catalytic combustion ignition starting device utilizing thermochemical heat storage comprises a thermochemical heat storage reaction system and a catalytic combustion chemical reaction system, wherein a chemical reaction of heat storage materials releasing heat is carried out in the thermochemical heat storage reaction system to generate thermochemical heat storage reaction products, the catalytic combustion chemical reaction system absorbs the heat released by the heat storage materials to carry out catalytic combustion ignition starting and carries out catalytic combustion after the catalytic combustion ignition starting to release heat, and the thermochemical heat storage reaction products in the thermochemical heat storage reaction system absorb the heat released by the catalytic combustion to be decomposed again to generate the heat storage materials so as to realize heat storage. A catalytic combustion ignition starting method utilizing thermochemical heat storage carries out chemical reaction for releasing heat on a heat storage material; the heat released by the heat storage material is used for catalytic combustion ignition starting; after the catalytic combustion is started, the catalytic combustion is carried out to release heat, and the thermochemical heat storage reaction products absorb the heat released by the catalytic combustion to be decomposed again to generate a heat storage material, so that the heat is stored.

Description

Catalytic combustion ignition starting device and method utilizing thermochemical heat storage
Technical Field
The invention relates to the field of catalytic combustion ignition starting, in particular to a catalytic combustion ignition starting device and method utilizing thermochemistry heat storage.
Background
The process of using a catalyst to increase combustion efficiency and reduce the formation of non-target products is commonly referred to as catalytic combustion. The catalytic combustion is a typical gas-solid phase catalytic reaction, and can obviously reduce the activation energy of reactant molecules, reduce energy consumption and improve the reaction conversion efficiency. The catalytic combustion is an organic waste treatment technology with low energy consumption, high efficiency and environmental protection. In addition, the catalytic combustion technology can effectively solve the problems of unstable gas phase combustion, insufficient fuel combustion and the like under the microscale.
In the catalytic combustion device, the ignition mode for starting the catalytic combustion reaction mainly comprises high-energy ignition, direct reaction and ignition with a catalyst, preheating incoming flow gas ignition and the like. The high-energy ignition device is a common ignition mode, but the ignition temperature of the catalytic combustion of part of fuel is high, and the direct ignition is difficult to realize. In addition, the fuel contains a large amount of combustible components, explosion can be caused when the fuel meets open fire, and the direct adoption of high-energy ignition has certain danger for gas catalytic combustion. The direct reaction with the catalyst for ignition is to react the fuel directly with the catalyst, and sometimes it is necessary to provide a catalyst for combustion start. However, this approach is difficult to achieve for fuels with higher light-off temperatures, and lower initial temperatures can greatly extend catalytic combustion start-up times. The preheating incoming flow gas ignition mode usually adopts an electric heating device to heat the incoming flow gas to a temperature higher than the ignition temperature, so as to realize the self-starting of the catalytic combustion reaction. However, electrical heating methods typically achieve only a small range of heating, and do not heat a large volume of gas simultaneously, which can extend the catalytic combustion start-up time. In addition, the above-mentioned several catalytic combustion starting modes have higher requirements for ignition sources and heating sources, and increase the complexity of the catalytic combustion device, and increase the energy consumption, which limits the application occasions of the catalytic combustion technology and reduces the convenience of the operation of the catalytic combustion device. Therefore, there is a need to develop a more convenient and efficient catalytic combustion start-up.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a catalytic combustion ignition starting device and a method by utilizing thermochemical heat storage, which do not need an additional heat source; the waste heat generated by the heat release of the catalytic combustion reaction is effectively utilized; part of energy released by catalytic combustion is stored by the heat storage material and used for starting ignition of the next catalytic combustion, so that the convenience of operation and the energy utilization efficiency are improved.
The purpose of the invention is realized by the following technical scheme:
a catalytic combustion ignition starting device utilizing thermochemical heat storage comprises a thermochemical heat storage reaction system and a catalytic combustion chemical reaction system, wherein a chemical reaction of heat storage materials releasing heat is carried out in the thermochemical heat storage reaction system to generate thermochemical heat storage reaction products, the catalytic combustion chemical reaction system absorbs the heat released by the heat storage materials in the thermochemical heat storage reaction system to carry out catalytic combustion ignition starting, catalytic combustion is carried out in the catalytic combustion chemical reaction system after the catalytic combustion ignition starting to release heat, and the thermochemical heat storage reaction products in the thermochemical heat storage reaction system absorb the heat released by the catalytic combustion to decompose again to generate heat storage materials so as to realize heat storage.
Further, the catalytic combustion chemical reaction system comprises a catalytic combustion reaction chamber, a catalytic combustion catalyst layer is arranged in the catalytic combustion reaction chamber, the catalytic combustion reaction chamber is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with an air inlet valve and an air outlet valve, and the catalytic combustion chemical reaction system is partially or completely surrounded by the thermochemical heat storage reaction system;
the thermochemical heat storage reaction system comprises a reactant storage tank and a thermochemical heat storage reaction chamber connected with the reactant storage tank, wherein a thermochemical heat storage reaction working medium inlet and outlet valve is arranged between the reactant storage tank and the thermochemical heat storage reaction chamber, and a thermochemical heat storage material bed layer is arranged in the thermochemical heat storage reaction chamber.
Further, the thermochemical heat storage reaction chamber partially or completely surrounds the catalytic combustion reaction chamber.
Further, the sections of the thermochemical heat storage reaction chamber and the catalytic combustion reaction chamber are of concentric circle structures.
Further, the thermochemical heat storage material bed layer and the catalytic combustion catalyst layer are fixed through a metal separator.
A catalytic combustion ignition starting method utilizing thermochemical heat storage comprises the following steps:
s1: carrying out a chemical reaction for releasing heat on the heat storage material;
s2: the heat released by the heat storage material is used for catalytic combustion ignition starting;
s3: after the catalytic combustion is started, the catalytic combustion is carried out to release heat, and the thermochemical heat storage reaction products absorb the heat released by the catalytic combustion to be decomposed again to generate a heat storage material, so that the heat is stored.
Further, the step S1 includes the following sub-steps:
s101: placing a heat storage material on a thermochemical heat storage material bed layer of the thermochemical heat storage reaction chamber;
s102: opening a thermochemical heat storage reaction working medium inlet and outlet valve, introducing an auxiliary material which reacts with the heat storage material into the thermochemical heat storage reaction chamber from the reactant storage tank, and carrying out synthetic reaction on the heat storage material and the introduced auxiliary material to generate a thermochemical heat storage reaction product and release heat.
Further, the step S2 includes the following sub-steps:
s201: opening an air inlet valve of the catalytic combustion reaction chamber, and introducing fuel and air premixed gas of the catalytic combustion reaction through an air inlet;
s202: the heat released by the heat storage material heats the premixed gas of the fuel and the air and supplies heat for the catalytic combustion ignition start.
Further, the step S3 includes the following sub-steps:
s301: carrying out catalytic combustion reaction on the premixed gas of the fuel and the air and releasing heat;
s302: part of heat released by catalytic combustion heats thermal chemical heat storage reaction products to be decomposed again to generate a heat storage material, so that heat is stored;
s303: and (3) when the thermal storage material is generated by decomposing the thermal chemical heat storage reaction product again, the auxiliary material is also generated and flows back into the reactant storage tank for storage, and then the inlet and outlet valves of the thermal chemical heat storage reaction working medium are closed.
The beneficial effects of the invention are:
(1) no extra heat source is needed, the device is suitable for various occasions, and the use conditions are convenient and quick;
(2) the waste heat generated by the heat release of the catalytic combustion reaction can be effectively utilized; the ignition starting of the catalytic combustion can be simply and conveniently carried out;
(3) part of energy released by catalytic combustion is stored by the heat storage material and used for starting ignition of the next catalytic combustion, so that the convenience of operation and the energy utilization efficiency are improved.
Drawings
FIG. 1 is a schematic structural view of a catalytic combustion pilot starting apparatus utilizing thermochemical heat storage;
FIG. 2 is a cross-sectional view of a catalytic combustion pilot starter utilizing thermal chemical heat storage;
FIG. 3 is a left side view showing the construction of a catalytic combustion pilot starting apparatus using thermal chemical heat accumulation;
FIG. 4 is a right side view showing a structure of a catalytic combustion pilot starting apparatus using thermal chemical heat accumulation;
the reference numbers in the figures illustrate: 1. a reactant storage tank; 2. a bed of thermochemical heat storage material; 3. a thermochemical heat storage reaction chamber; 301. a thermochemical heat storage reaction working medium inlet and outlet valve; 4. a catalytic combustion catalyst layer; 5. a catalytic combustion reaction chamber; 501. an air inlet valve; 502. an air outlet valve; 6. an air inlet; 7. a thermochemical heat storage reaction working medium inlet and outlet; 8. a metal separator; 9. and an air outlet.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. 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.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1 to 4, a catalytic combustion ignition starting device using thermochemical heat storage includes a thermochemical heat storage reaction system and a catalytic combustion chemical reaction system, wherein a chemical reaction of heat storage material releasing heat in the thermochemical heat storage reaction system generates a thermochemical heat storage reaction product, the catalytic combustion chemical reaction system absorbs heat released by the heat storage material in the thermochemical heat storage reaction system to perform catalytic combustion ignition starting, the catalytic combustion chemical reaction system performs catalytic combustion after catalytic combustion ignition starting to release heat, and the thermochemical heat storage reaction product in the thermochemical heat storage reaction system absorbs heat released by catalytic combustion and is decomposed again to generate a heat storage material, so that heat is stored.
The catalytic combustion chemical reaction system comprises a catalytic combustion reaction chamber 5, a catalytic combustion catalyst layer 4 is arranged in the catalytic combustion reaction chamber 5, the catalytic combustion reaction chamber 5 is provided with an air inlet 6 and an air outlet 9, the air inlet 6 and the air outlet 9 are respectively provided with an air inlet valve 501 and an air outlet valve 502, and part or all of the catalytic combustion chemical reaction system is surrounded by a thermochemical heat storage reaction system;
the catalytic combustion catalyst layer 4 is provided with a catalyst which is a supported platinum catalyst;
the thermochemical heat storage reaction system comprises a reactant storage tank 1 and a thermochemical heat storage reaction chamber 3 connected with the reactant storage tank 1 through a connecting pipeline, a thermochemical heat storage reaction working medium inlet and outlet valve 301 is arranged between the reactant storage tank 1 and the thermochemical heat storage reaction chamber 3, and a thermochemical heat storage material bed layer 2 is arranged in the thermochemical heat storage reaction chamber 3.
The thermochemical heat storage reaction chamber 3 is provided with a thermochemical heat storage reaction working medium inlet and outlet 7, the thermochemical heat storage reaction working medium inlet and outlet 7 is connected with the reactant storage tank 1 through a connecting pipeline, and the thermochemical heat storage reaction working medium inlet and outlet 7 is provided with a thermochemical heat storage reaction working medium inlet and outlet valve 301.
And a thermal storage material is placed on the thermochemical thermal storage material bed layer 2.
The reactant storage tank 1 is internally provided with an auxiliary material which reacts with the heat storage material, and the auxiliary material is H2O。
The heat storage material is MgO.
The thermochemical regenerative reaction chamber 3 partially or totally surrounds the catalytic combustion reaction chamber 5 in an annular configuration.
The sections of the thermochemical heat storage reaction chamber 3 and the catalytic combustion reaction chamber 5 are of concentric circle structures.
The thermochemical heat storage material bed layer 2 and the catalytic combustion catalyst layer 4 are fixed by a metal separator 8.
A catalytic combustion ignition starting method utilizing thermochemical heat storage comprises the following steps:
s1: carrying out a chemical reaction for releasing heat on the heat storage material;
s101: placing a heat storage material in a thermochemical heat storage material bed layer 2 of a thermochemical heat storage reaction chamber 3;
the heat storage material is MgO.
S102: opening a thermochemical heat storage reaction working medium inlet and outlet valve 301, introducing an auxiliary material which reacts with a heat storage material into the thermochemical heat storage reaction chamber 3 from the reactant storage tank 1, and performing synthetic reaction on the heat storage material and the introduced auxiliary material to generate a thermochemical heat storage reaction product and release heat;
the auxiliary material is gas or steam; the auxiliary material is H2O；
Heating H in reactant storage tank 1 by using low-temperature heat source2O, such that H2O gasification enters from a thermochemical heat storage reaction working medium inlet and outlet 7, and H2The O steam fully reacts with the heat storage material MgO on the thermochemical heat storage material bed layer 2 to release a large amount of heat and generate a thermochemical heat storage reaction product Mg (OH)2. The temperature is raised to 50 to 80 ℃ higher than the boiling point of ethanol, namely 120 to 160 ℃ (the boiling point of ethanol is about 78.4 ℃), and the next step (step S2) is carried out.
S2: the heat released by the heat storage material is used for catalytic combustion ignition starting;
s201: opening an air inlet valve 501 of the catalytic combustion reaction chamber 5, and introducing fuel ethanol and air premixed gas of the catalytic combustion reaction through an air inlet 6;
s202: the heat released by the heat storage material is used for heating premixed gas of fuel ethanol and air and supplying heat for the catalytic combustion ignition starting;
heat storage materials MgO and H2The heat released by the O steam reaction enters a catalytic combustion reaction chamber 5, the catalytic combustion reaction temperature is raised to the starting temperature on the catalytic combustion catalyst layer 4, and the ethanol undergoes a catalytic combustion reaction;
s3: after the catalytic combustion ignition is started, the catalytic combustion is carried out to release heat, and the thermochemical heat storage reaction product absorbs the heat released by the catalytic combustion to be decomposed again to generate a heat storage material so as to realize the storage of the heat;
s301: the premixed gas of fuel ethanol and air carries out catalytic combustion reaction in the catalytic combustion catalyst layer 4 and releases the self reaction heat;
s302: part of heat released by catalytic combustion maintains the self reaction temperature of catalytic combustion, and the other part of heat enters the thermochemical heat storage reaction chamber 3 to heat the thermochemical heat storage reaction products to be decomposed again to generate heat storage materials, so that the heat is stored.
S303: when the thermal storage material is generated by the re-decomposition of the thermal chemical thermal storage reaction product, an auxiliary material is generated, the auxiliary material flows back into the reactant storage tank 1 to be stored in a gaseous or liquid state, and then the inlet and outlet valve 301 of the thermal chemical thermal storage reaction working medium is closed.
Purified gas CO generated by ethanol catalytic combustion reaction2And gaseous H2O is discharged through the outlet 9.
When the temperature generated by the ethanol catalytic combustion reaction reaches 350 ℃ or above, a part of heat is remained in the catalytic combustion reaction chamber 5 to keep the catalytic combustion reaction temperature of the reaction, the other part of heat is transferred to the thermochemical heat storage reaction chamber 3 again, and thermochemical heat storage reaction products Mg (OH) in the thermochemical heat storage reaction chamber 32The reaction regenerates the heat storage materials MgO and H2O vapor, Mg (OH)2Has a decomposition temperature of about 350 ℃ and H2The O steam is discharged from the thermochemical heat storage reaction working medium inlet and outlet 7 back to the reactant storage tank 1 to be condensed and stored.
By hydration of the heat-accumulating material MgO to form the thermochemical heat-accumulating reaction product Mg (OH)2The heat released by the thermochemical reaction realizes the ignition starting of the ethanol catalytic combustion, and the thermochemical heat-storage reaction product Mg (OH) is generated by utilizing the heat generated by the ethanol catalytic combustion2The reaction occurs to generate a heat storage material MgO for heat storage.
MgO/Mg(OH)2Thermochemical regenerative reaction system based on Mg (OH)2Has high heat storage density which can reach 380kWh/m3Heat storage density of (3), Mg (OH)2The decomposition temperature of (a) is about 350 ℃.
The boiling point of the ethanol is about 78.4 ℃, the ethanol starts to burn when the temperature reaches about 120 ℃ under the action of the supported platinum catalyst, and the final combustion stable temperature reaches over 450 ℃.
Heat-accumulative materials MgO and H2The hydration reaction carried out by the O steam can release a large amount of heat, and the heat raises the temperature in the ethanol catalytic combustion reaction chamber 5 to the catalytic combustion reaction starting temperature, so that the purpose of starting the catalytic combustion reaction is achieved. Meanwhile, a part of heat generated by the ethanol catalytic combustion reaction is used for the self-catalytic combustion reaction, and the other part of heat enters the thermochemical heat storage reaction chamber 3, so that Mg (OH)2Decomposition reaction occurs, and sufficient heat is absorbed to obtain the heat storage material MgO and gaseous H again2And O, achieving the purpose of energy storage.
A catalytic combustion ignition starting device and a method thereof by utilizing thermochemical heat storage do not need an additional heat source, are suitable for various occasions, and have convenient and rapid use conditions; the waste heat generated by the heat release of the catalytic combustion reaction can be effectively utilized; the ignition starting of the catalytic combustion can be simply and conveniently carried out; the system directly absorbs the heat released by the catalytic combustion reaction and consists of a positive displacement device, and has small thermal resistance, small heat loss and high energy utilization rate in the heat storage process; part of energy released by catalytic combustion is stored by the heat storage material and used for starting ignition of the next catalytic combustion, so that the convenience of operation and the energy utilization efficiency are improved.
The catalytic combustion reaction emits a large amount of heat, partial heat is stored through the heat storage material, and the heat stored in the heat storage material is released to preheat fuel and gas when the next catalytic combustion is started, so that the purpose of catalytic combustion ignition starting is achieved.
The catalytic combustion heat production is stored by adopting a gas-solid thermochemical heat storage technology. The thermochemical heat storage technology is based on reversible thermochemical reaction, and has the advantages of high energy storage density, no need of heat preservation and the like. When absorbing heat, decomposition reaction occurs, and products are separated and stored; when heat is needed, the synthesis reaction is carried out to release heat, thereby achieving the purpose of storing and releasing heat energy.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (7)

1. A catalytic combustion ignition starting device utilizing thermochemical heat storage is characterized in that: the thermochemical heat storage reaction system and the catalytic combustion chemical reaction system are included, the thermochemical heat storage reaction system carries out chemical reaction of heat storage materials for releasing heat to generate thermochemical heat storage reaction products, the catalytic combustion chemical reaction system absorbs the heat released by the heat storage materials in the thermochemical heat storage reaction system to carry out catalytic combustion ignition starting, the catalytic combustion chemical reaction system carries out catalytic combustion after the catalytic combustion ignition starting to release heat, and the thermochemical heat storage reaction products in the thermochemical heat storage reaction system absorb the heat released by the catalytic combustion to be decomposed again to generate heat storage materials so as to realize heat storage;
the catalytic combustion chemical reaction system comprises a catalytic combustion reaction chamber, a catalytic combustion catalyst layer is arranged in the catalytic combustion reaction chamber, the catalytic combustion reaction chamber is provided with an air inlet and an air outlet, an air inlet valve and an air outlet valve are respectively arranged on the air inlet and the air outlet, and the catalytic combustion chemical reaction system is partially or completely surrounded by a thermochemical heat storage reaction system;
the thermochemical heat storage reaction system comprises a reactant storage tank and a thermochemical heat storage reaction chamber connected with the reactant storage tank, wherein a thermochemical heat storage reaction working medium inlet and outlet valve is arranged between the reactant storage tank and the thermochemical heat storage reaction chamber, and a thermochemical heat storage material bed layer is arranged in the thermochemical heat storage reaction chamber;
a thermal storage material is placed on the thermochemical thermal storage material bed layer;
the reactant storage tank is internally provided with an auxiliary material which reacts with the heat storage material, and the auxiliary material is H2O；
The heat storage material is MgO.
2. The catalytic combustion ignition starting apparatus utilizing thermal chemical heat accumulation as set forth in claim 1, wherein:
the sections of the thermochemical heat storage reaction chamber and the catalytic combustion reaction chamber are of concentric circle structures.
3. The catalytic combustion ignition starting apparatus utilizing thermal chemical heat accumulation as set forth in claim 1, wherein:
the thermochemical heat storage material bed layer and the catalytic combustion catalyst layer are fixed through the metal partition plate.
4. A catalytic combustion ignition starting method using thermal chemical heat storage applied to a catalytic combustion ignition starting apparatus using thermal chemical heat storage according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
s1: carrying out a chemical reaction for releasing heat on the heat storage material;
s2: the heat released by the heat storage material is used for catalytic combustion ignition starting;
s3: after the catalytic combustion is started, the catalytic combustion is carried out to release heat, and the thermochemical heat storage reaction products absorb the heat released by the catalytic combustion to be decomposed again to generate a heat storage material, so that the heat is stored.
5. The method for starting catalytic combustion ignition by thermal chemical heat accumulation according to claim 4, wherein: the step S1 includes the following sub-steps:
s101: placing a heat storage material on a thermochemical heat storage material bed layer of the thermochemical heat storage reaction chamber;
s102: opening a thermochemical heat storage reaction working medium inlet and outlet valve, introducing an auxiliary material which reacts with the heat storage material into the thermochemical heat storage reaction chamber from the reactant storage tank, and carrying out synthetic reaction on the heat storage material and the introduced auxiliary material to generate a thermochemical heat storage reaction product and release heat.
6. The method for starting catalytic combustion ignition by thermal chemical heat accumulation according to claim 4, wherein: the step S2 includes the following sub-steps:
s201: opening an air inlet valve of the catalytic combustion reaction chamber, and introducing fuel and air premixed gas of the catalytic combustion reaction through an air inlet;
s202: the heat released by the heat storage material heats the premixed gas of the fuel and the air and supplies heat for the catalytic combustion ignition start.
7. The method for starting catalytic combustion ignition by thermal chemical heat accumulation according to claim 6, wherein: the step S3 includes the following sub-steps:
s301: carrying out catalytic combustion reaction on the premixed gas of the fuel and the air and releasing heat;
s302: part of heat released by catalytic combustion heats thermal chemical heat storage reaction products to be decomposed again to generate a heat storage material, so that heat is stored;
s303: and (3) when the thermal storage material is generated by decomposing the thermal chemical heat storage reaction product again, the auxiliary material is also generated and flows back into the reactant storage tank for storage, and then the inlet and outlet valves of the thermal chemical heat storage reaction working medium are closed.
CN202110458861.4A 2021-04-27 2021-04-27 Catalytic combustion ignition starting device and method utilizing thermochemical heat storage Active CN113091052B (en)

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