Humidity-controllable hydrogen fuel kiln system
By introducing components such as low-temperature heat exchange modules, heat pump modules, and expansion modules into the hydrogen fuel cell kiln, the temperature and pressure of the combustion products are adjusted, solving the problem of excessive water vapor content and achieving controllable humidity within the kiln, thus meeting the humidity requirements of different fired products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-10
AI Technical Summary
The existing hydrogen fuel cell kilns have excessively high moisture content, which affects humidity control inside the kiln and makes it difficult to meet the firing requirements of specific products.
The system employs a humidity-controlled hydrogen fuel cell kiln, which uses components such as a low-temperature heat exchange module, a heat pump module, a high-temperature heat exchange module, and an expansion module to regulate the temperature and pressure of the combustion products, thereby achieving the condensation and discharge of water vapor and controlling the humidity inside the kiln.
It effectively regulates the humidity inside the kiln, meets the humidity requirements of different fired products, reduces the water vapor content inside the kiln, and achieves diversified humidity control.
Smart Images
Figure CN223985569U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to industrial kiln technical field, concretely relates to a controllable humid hydrogen fuel kiln system. BACKGROUND
[0002] The existing kiln generally uses natural gas as raw material, and the kiln flue gas has the disadvantages of high carbon emission and serious pollution. Using hydrogen fuel to replace natural gas fuel is a feasible way to achieve carbon emission reduction and reduce pollution. Hydrogen combustion with oxygen releases heat and produces water. Compared with the combustion products of natural gas, which are carbon dioxide and water, the combustion products of hydrogen are pure water, which can cause the water vapor content in the kiln to be too high, which is not conducive to the firing of specific products. SUMMARY
[0003] To overcome the problem of excessive water vapor content in the above-mentioned hydrogen fuel kiln, the utility model provides the following technical scheme:
[0004] A controllable humid hydrogen fuel kiln system, characterized in that: it comprises: a kiln, the furnace wall of the kiln comprises: a furnace wall high temperature zone, a furnace wall heat insulation layer and a furnace wall low temperature zone, the furnace wall high temperature zone, the furnace wall heat insulation layer and the furnace wall low temperature zone are arranged in order from inside to outside, the controllable humid hydrogen fuel kiln system further comprises: a low temperature heat exchange module and a high temperature heat exchange module communicated with the tail gas outlet of the controllable humid hydrogen fuel kiln, a heat pump module, the inlet of the heat pump module is communicated with the outlet of the low temperature heat exchange module; the outlet of the heat pump module is communicated with the inlet of the high temperature heat exchange module, and the combustion product outlet of the high temperature heat exchange module is communicated with the furnace wall high temperature zone.
[0005] Further, the system further comprises: a compression module and an expansion module, the compression module inlet is communicated with the combustion product outlet of the low temperature heat exchange module, the combustion product inlet of the expansion module is communicated with the combustion product outlet of the compression module, and the combustion product outlet of the expansion module is communicated with the combustion product inlet of the high temperature heat exchange module.
[0006] Further, the low temperature heat exchange module comprises a first heat exchanger, the combustion product inlet of the first heat exchanger is communicated with the combustion product outlet of the kiln, the combustion product outlet of the first heat exchanger is communicated with the combustion product inlet of the compression module, and the heat exchange working medium outlet of the first heat exchanger is communicated with the heat exchange working medium inlet of the high temperature heat exchange module through the heat pump module.
[0007] Further, the low temperature heat exchange module comprises a first heat storage module, and the heat storage working medium inlet of the first heat storage module is communicated with the heat storage working medium outlet of the first heat exchanger.
[0008] Further, the high-temperature heat exchange module comprises a second heat exchanger, the second heat exchanger heat exchange working medium inlet is communicated with the first heat exchanger heat exchange working medium outlet through the heat pump module, and the second heat exchanger combustion product inlet is communicated with the expansion module combustion product outlet.
[0009] Further, the high-temperature heat exchange module comprises a second heat exchanger, the second heat exchanger heat exchange working medium inlet is communicated with the first heat exchanger heat exchange working medium outlet through the heat pump module, and the second heat exchanger combustion product inlet is communicated with the expansion module combustion product outlet.
[0010] Further, the second heat storage module heat storage working medium inlet is communicated with the first heat storage module heat storage working medium outlet.
[0011] Further, the hydrogen inlet and the oxidant inlet are further arranged on the furnace wall of the kiln.
[0012] Compared with the prior art, the controllable-humidity hydrogen fuel kiln system has the following beneficial effects:
[0013] Firstly, the high-temperature combustion product rich in water vapor is first cooled and pressurized, and then pressurized and cooled, so that the water vapor is condensed and discharged under the condition of low temperature and high pressure, thereby adjusting the water vapor content in the combustion chamber.
[0014] Secondly, the controllable-humidity hydrogen fuel kiln system can adjust and control the discharge amount of condensed water according to the requirement of the fired product on the firing humidity, so as to realize the humidity change in the kiln and meet the humidity requirement of the diversified firing environment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 FIG. 1 is a structure diagram of the controllable-humidity hydrogen fuel kiln system of embodiment 1;
[0016] Figure 2 FIG. 2 is a structure diagram of the controllable-humidity hydrogen fuel kiln system of embodiment 2;
[0017] Figure 3 FIG. 3 is a structure diagram of the controllable-humidity hydrogen fuel kiln system of embodiment 3.
[0018] In the figure: 1, kiln; 2, hydrogen inlet; 3, oxidant inlet; 4, high-temperature zone of furnace wall; 5, heat insulation layer of furnace wall; 6, low-temperature zone of furnace wall; 7, heat pump module; 8, low-temperature heat exchange module; 81, first heat storage module; 82, first heat exchanger; 9, high-temperature heat exchange module; 91, second heat storage module; 92, second heat exchanger; 10, compression module; 11, expansion module. DETAILED DESCRIPTION
[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0020] Embodiment 1
[0021] Please refer to the drawings Figure 1 A controllable humidity hydrogen fuel kiln system comprises a kiln 1, the furnace wall of the kiln 1 comprises a furnace wall high temperature zone 4, a furnace wall heat insulation layer 5 and a furnace wall low temperature zone 6, the furnace wall high temperature zone 4, the furnace wall heat insulation layer 5 and the furnace wall low temperature zone 6 are arranged in order from inside to outside, the furnace wall heat insulation layer 5 effectively reduces the mutual influence of the furnace wall high temperature zone 4 and the furnace wall low temperature zone 6 by blocking the transmission of heat, thereby maintaining the temperature difference between the furnace wall high temperature zone 4 and the furnace wall low temperature zone 6.
[0022] The controllable humidity hydrogen fuel kiln system further comprises a low-temperature heat exchange module 8 in communication with the controllable humidity hydrogen fuel kiln tail gas outlet, the low-temperature heat exchange module 8 is used to export the heat of the kiln module 1 combustion products, so that when the kiln 1 combustion products flow through the low-temperature heat exchange module 8 as a working medium, the temperature of the kiln 1 combustion products is reduced to below 80℃, and the water vapor condenses, thereby achieving the purpose of reducing humidity;
[0023] The controllable humidity hydrogen fuel kiln system further comprises a high-temperature heat exchange module 9 and a heat pump module 7, the inlet of the heat pump module 7 is in communication with the outlet of the low-temperature heat exchange module 8, and the outlet of the heat pump module 7 is in communication with the inlet of the high-temperature heat exchange module 9.
[0024] The heat pump module 7 converts the low-grade heat of the low-temperature heat exchange module 8 into high-grade heat energy, thereby maintaining the temperature difference between the low-temperature heat exchange module 8 and the high-temperature heat exchange module 9, and further achieving the purpose of maintaining the temperature difference between the furnace wall high temperature zone 4 and the furnace wall low temperature zone 6;
[0025] The heat pump module 7, the low-temperature heat exchange module 8 and the high-temperature heat exchange module 9 in the embodiment use combustion products as heat exchange working medium.
[0026] Embodiment 2
[0027] Please refer to the drawings Figure 2A controllable wet hydrogen fuel kiln system, comprising: a kiln 1, the furnace wall of the kiln 1 comprises: a furnace wall high temperature zone 4, a furnace wall insulation layer 5 and a furnace wall low temperature zone 6, which are arranged in order from inside to outside, the furnace wall insulation layer 5 effectively reduces the mutual influence of the furnace wall high temperature zone 4 and the furnace wall low temperature zone 6 by blocking the transfer of heat, thereby maintaining the temperature difference between the furnace wall high temperature zone 4 and the furnace wall low temperature zone 6.
[0028] The controllable wet hydrogen fuel kiln system further comprises: a low-temperature heat exchange module 8 in communication with the controllable wet hydrogen fuel kiln tail gas outlet, the low-temperature heat exchange module 8 exports the heat of the kiln 1 combustion products through the heat exchange working medium, so that the kiln 1 combustion products flow through the low-temperature heat exchange module 8 as the working medium, and the temperature of the kiln 1 combustion products is reduced; different from embodiment 1, the temperature of the combustion products is reduced to above 100℃;
[0029] The controllable wet hydrogen fuel kiln system further comprises: a high-temperature heat exchange module 9 and a heat pump module 7. Different from the implementation 1, the heat conduction between the high-temperature heat exchange module 9 and the heat pump module 7 is not with the combustion products as the working medium, but with other heat exchange working medium, which is used to export the heat of the combustion products, the heat pump module 7 heat exchange working medium inlet is in communication with the low-temperature heat exchange module 8 heat exchange working medium outlet; the heat pump module 7 heat exchange working medium outlet is in communication with the high-temperature heat exchange module 9 heat exchange working medium inlet, the high-temperature heat exchange module 9 combustion product outlet is in communication with the furnace wall high temperature zone 4, and the heat pump module 7 converts the low-grade heat of the low-temperature heat exchange module 8 into high-grade heat energy.
[0030] The controllable wet hydrogen fuel kiln system of the present embodiment further comprises: a compression module 10 and an expansion module 11, the compression module 10 inlet is in communication with the low-temperature heat exchange module 8 combustion product outlet, which is used to raise the pressure of the low-temperature combustion products flowing out of the low-temperature heat exchange module 8 through the compression module 10; the low-temperature combustion products flowing out of the compression module 10 have low temperature and high pressure, which causes water vapor to condense, and the condensed water is discharged, reducing the water content of the combustion products.
[0031] The expansion module 11 combustion product inlet is in communication with the compression module 10 combustion product outlet, which is used to reduce the pressure of the high-pressure combustion products with reduced water content through the expansion module 11 to be consistent with the pressure of the kiln module; the expansion module 11 combustion product outlet is in communication with the high-temperature heat exchange module 9 combustion product inlet, so as to realize that the low-temperature combustion products flowing out of the expansion module 11 pass through the high-temperature heat exchange heat storage module 9, absorb heat, and raise the temperature to close to the temperature of the furnace wall high temperature zone 4 of the kiln 1, and finally return to the furnace wall high temperature zone 4 of the kiln.
[0032] The embodiment separates the humidity control and temperature control processes of the kiln 1, so that the temperature difference between the low-temperature heat exchange module 8 and the high-temperature heat exchange module 9 can be better maintained, thereby achieving the purpose of maintaining the temperature difference between the high-temperature zone 4 and the low-temperature zone 6 of the furnace wall.
[0033] Embodiment 3
[0034] Please refer to the accompanying Figure 3 Unlike embodiment 2, the hot working medium of the present embodiment is divided into heat exchange working medium and heat storage working medium, which realizes different purposes of heat exchange and heat storage; unlike embodiment 2, the low-temperature heat exchange module 8 comprises: a first heat storage module 81 and a first heat exchanger 82, the combustion product inlet of the first heat exchanger 82 is in communication with the combustion product outlet of the kiln 1, the combustion product outlet of the first heat exchanger 82 is in communication with the combustion product inlet of the compression module 10, and the first heat exchanger 82 is used to conduct the waste heat of the combustion product out of the kiln 1, to the first heat storage module 81, and to conduct the low-temperature waste heat of the combustion product out of the kiln 1 to the heat pump module 7.
[0035] The heat storage working medium inlet of the first heat storage module 81 is in communication with the heat storage working medium outlet of the first heat exchanger 82, and the heat exchange working medium outlet of the first heat exchanger 82 is in communication with the heat exchange working medium inlet of the high-temperature heat exchange module 9 through the heat pump module 7, and the first heat storage module 81 is used to store the heat of the combustion product of the kiln 1.
[0036] Unlike embodiment 2, the high-temperature heat exchange module 9 comprises: a second heat storage module 91 and a second heat exchanger 92, the heat exchange working medium inlet of the second heat exchanger 92 is in communication with the heat exchange working medium outlet of the first heat exchanger 82 through the heat pump module 7, and the combustion product inlet of the second heat exchanger 92 is in communication with the combustion product outlet of the expansion module 11.
[0037] The heat storage working medium outlet of the second heat storage module 91 is in communication with the heat storage working medium inlet of the second heat exchanger 92, and the heat storage working medium inlet of the second heat storage module 91 is in communication with the heat storage working medium outlet of the first heat storage module 81, and the second heat storage module 91 is used to import heat from the first heat storage module 81 for the second heat exchanger 92 to supply heat to the combustion product passing through the expansion module 11, thereby achieving the purpose of regulating heat supply.
[0038] Further, the hydrogen fuel kiln system of the present embodiment further comprises a hydrogen inlet 2 and an oxidant inlet 3 on the furnace wall of the kiln 1, which are used to introduce hydrogen and oxidant into the kiln module to produce combustion products rich in water through oxidation reaction; further, the oxidant can be pure oxygen or air.
[0039] In the operation of the controllable humidity hydrogen fuel kiln system described in embodiments 2 and 3 of this utility model, the temperature and humidity inside the kiln 1 are determined according to the requirements of the fired products; the amount of hydrogen entering and the amount of condensate discharged are determined according to the temperature and humidity requirements of the kiln 1; the amount of product extracted, the heat exchange in the low-temperature heat exchange module 8, and the outlet pressure of the compression module 10 are determined according to the amount of condensate; the heat exchange in the high-temperature heat exchange and storage module 9 and the heat related to the heat pump 7 are determined according to the heat exchange in the low-temperature heat exchange module 8 and the temperature of the kiln 1; finally, the outlet pressure of the expansion module 11 is determined according to the pressure of the kiln 1.
[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A controllably humidified hydrogen fuel-fired furnace system, characterized by: The system comprises: a kiln (1), a furnace wall of the kiln (1) comprises: a furnace wall high temperature zone (4), a furnace wall insulation layer (5) and a furnace wall low temperature zone (6), the furnace wall high temperature zone (4), the furnace wall insulation layer (5) and the furnace wall low temperature zone (6) are arranged in sequence from inside to outside, the controllable wet hydrogen fuel kiln system further comprises: a low temperature heat exchange module (8) and a high temperature heat exchange module (9) communicated with the controllable wet hydrogen fuel kiln tail gas outlet, a heat pump module (7), the inlet of the heat pump module (7) is communicated with the outlet of the low temperature heat exchange module (8); the outlet of the heat pump module (7) is communicated with the inlet of the high temperature heat exchange module (9), and the combustion product outlet of the high temperature heat exchange module (9) is communicated with the furnace wall high temperature zone (4).
2. The controllably humidified hydrogen fueled furnace system of claim 1, wherein: The system further comprises: a compression module (10) and an expansion module (11), the combustion product outlet of the low temperature heat exchange module (8) is communicated with the combustion product inlet of the compression module (10), the combustion product inlet of the expansion module (11) is communicated with the combustion product outlet of the compression module (10), and the combustion product outlet of the expansion module (11) is communicated with the combustion product inlet of the high temperature heat exchange module (9).
3. The controllably humidified hydrogen fueled furnace system of claim 2, wherein: The low temperature heat exchange module (8) comprises: a first heat exchanger (82), the combustion product inlet of the first heat exchanger (82) is communicated with the combustion product outlet of the kiln (1), the combustion product outlet of the first heat exchanger (82) is communicated with the combustion product inlet of the compression module (10), and the heat exchange working medium outlet of the first heat exchanger (82) is communicated with the heat exchange working medium inlet of the high temperature heat exchange module (9) through the heat pump module (7).
4. The controllably humidified hydrogen fueled furnace system of claim 3, wherein: The low temperature heat exchange module (8) comprises: a first heat storage module (81), the heat storage working medium inlet of the first heat storage module (81) is communicated with the heat storage working medium outlet of the first heat exchanger (82).
5. The controllably humidified hydrogen fueled furnace system of claim 4, wherein: The high temperature heat exchange module (9) comprises a second heat exchanger (92), the heat exchange working medium inlet of the second heat exchanger (92) is communicated with the heat exchange working medium outlet of the first heat exchanger (82) through the heat pump module (7), and the combustion product inlet of the second heat exchanger (92) is communicated with the combustion product outlet of the expansion module (11).
6. The controllably humidified hydrogen fueled furnace system of claim 5, wherein: The high temperature heat exchange module (9) comprises a second heat storage module (91), the heat storage working medium outlet of the second heat storage module (91) is communicated with the heat storage working medium inlet of the second heat exchanger (92).
7. The controllably humidified hydrogen fueled furnace system of claim 6, wherein: The heat storage working medium inlet of the second heat storage module (91) is communicated with the heat storage working medium outlet of the first heat storage module (81).
8. The controllable wet hydrogen fueled furnace system of any of claims 1-7, wherein: The furnace wall of the kiln (1) is further provided with a hydrogen inlet (2) and an oxidant inlet (3).