CN110684878A - A HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and new process - Google Patents
A HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and new process Download PDFInfo
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- 239000007789 gas Substances 0.000 title claims abstract description 96
- 239000002918 waste heat Substances 0.000 title claims abstract description 74
- 238000003723 Smelting Methods 0.000 title claims abstract description 39
- 230000009467 reduction Effects 0.000 title claims abstract description 39
- 238000011084 recovery Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000000746 purification Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 54
- 238000002156 mixing Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000009834 vaporization Methods 0.000 claims abstract description 18
- 230000008016 vaporization Effects 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 239000003034 coal gas Substances 0.000 claims 32
- 230000001105 regulatory effect Effects 0.000 claims 3
- 230000003750 conditioning effect Effects 0.000 abstract description 10
- 238000001035 drying Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/10—Arrangements for using waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/10—Arrangements for using waste heat
- F27D17/102—Arrangements for using waste heat including pyrolising the waste gases
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- Y02P10/25—Process efficiency
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Abstract
发明是关于一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺,是在原有湿法系统基础上改为干法系统。该系统包括煤气混合调温室、旋风除尘器、余热装置、高温布袋除尘器、低温煤气回流管路及风机。HIsmelt熔融还原炉高温煤气经过汽化冷却烟道回收余热及降温后温度达到800℃‑900℃，进入煤气混合调温室与低温回流风机抽回的低温煤气混合调温，通过管道与旋风除尘器连接，旋风除尘器与余热装置连接，余热装置与高温布袋除尘器连接，净化后煤气供用户及现场使用。本发明流程顺畅，煤气经过煤气调温后进入余热装置，避免了余热装置粘渣结垢，提高了余热装置换热效率，增加使用寿命，本工艺采用高温布袋除尘器净化煤气，节省了水资源。
The invention relates to a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and a new process, which is changed to a dry-process system on the basis of the original wet-process system. The system includes a gas mixing chamber, a cyclone dust collector, a waste heat device, a high temperature bag filter, a low temperature gas return pipeline and a fan. The high-temperature gas of the HIsmelt smelting reduction furnace recovers the waste heat and cools down through the vaporization cooling flue, and the temperature reaches 800℃-900℃. It enters the gas mixing and conditioning chamber and is mixed with the low-temperature gas drawn back by the low-temperature return fan for temperature adjustment, and is connected to the cyclone dust collector through the pipeline. The cyclone dust collector is connected with the waste heat device, and the waste heat device is connected with the high temperature bag filter, and the purified gas is available for users and on-site use. The process of the invention is smooth, and the gas enters the waste heat device after being tempered by the gas, which avoids the slag sticking and scaling of the waste heat device, improves the heat exchange efficiency of the waste heat device, and increases the service life. .
Description
技术领域technical field
本发明涉及火法冶炼行业除尘领域的HIsmelt熔融还原炉高温煤气湿法系统，特别是涉及一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺。The invention relates to a HIsmelt smelting reduction furnace high-temperature gas wet system in the field of dust removal in the pyrometallurgical industry, in particular to a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and a new process.
背景技术Background technique
HIsmelt熔融还原炉在冶炼过程中会产生高温煤气。这些高温煤气的温度可高达1500℃以上，含有大量的显热，煤气中还含有大量的粘性铁渣粒，如不对其进行处理将会造成能源浪费，且影响后续用户的使用。The HIsmelt smelting reduction furnace produces high temperature gas during the smelting process. The temperature of these high-temperature gas can be as high as 1500°C or more, containing a large amount of sensible heat, and a large amount of sticky iron slag particles in the gas. If it is not treated, it will cause energy waste and affect the use of subsequent users.
现在常用的系统有湿法，湿法系统中由于进入余热装置的烟温过于高，高达800℃，此时烟气中夹杂这熔融状态的渣粒，会粘结在余热装置上，造成余热装置换热效率低下，造成能源浪费；而采用湿法除尘一是会造成水资源浪费，二是烟尘去除率也相对偏低。The commonly used system now is the wet method. In the wet method, the temperature of the flue gas entering the waste heat device is too high, up to 800°C. At this time, the molten slag particles mixed in the flue gas will stick to the waste heat device, resulting in the waste heat device. The heat exchange efficiency is low, resulting in waste of energy; the use of wet dust removal will cause waste of water resources, and the removal rate of smoke and dust is relatively low.
有鉴于上述现有的一种HIsmelt熔融还原炉高温煤气净化余热回收存在的问题，本发明人积极加以研究创新，创设一种新型结构的HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺，能够改进一般现有的HIsmelt熔融还原炉高温煤气净化余热回收工艺，使其更具有实用性。In view of the problems existing in the above-mentioned existing high-temperature gas purification waste heat recovery of a HIsmelt smelting reduction furnace, the present inventor actively researches and innovates, and creates a new structure of a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system And the new process can improve the general existing HIsmelt smelting reduction furnace high temperature gas purification waste heat recovery process, making it more practical.
发明内容SUMMARY OF THE INVENTION
本发明的主要目的在于，克服现有的HIsmelt熔融还原炉高温煤气净化余热回收工艺存在的问题，而提供一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺,所要解决的技术问题是提供一种湿法改干法净化余热回收新工艺，以降低余热装置的故障率，确保运行稳定。The main purpose of the present invention is to overcome the problems existing in the existing HIsmelt smelting reduction furnace high-temperature gas purification waste heat recovery process, and provide a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and a new process. The technical problem of the invention is to provide a new process for purifying waste heat recovery from wet process to dry process, so as to reduce the failure rate of the waste heat device and ensure stable operation.
本发明的另一目的在于，提供一种新的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺，所要解决的技术问题是使其增加其余热回收效率，减少水资源用量，实现节能减排的目的，从而更加适于实用。Another object of the present invention is to provide a new HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system and a new process, the technical problem to be solved is to increase the remaining heat recovery efficiency and reduce water Resource consumption, to achieve the purpose of energy saving and emission reduction, which is more suitable for practical use.
本发明的目的及解决其技术问题是采用以下技术方案来实现的。依据本发明提出的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统，是在原HIsmelt熔融还原炉高温煤气湿法净化余热回收系统的基础上改为HIsmelt熔融还原炉高温煤气干法净化余热回收系统,该系统保留了原HIsmelt熔融还原炉高温煤气湿法净化余热回收系统的汽化冷却烟道、旋风除尘器和余热装置,去掉了煤气清洗装置,增加了煤气混合调温室、高温布袋除尘器、低温煤气回流管路及风机,其中高温煤气经过汽化冷却烟道降温后，与所述煤气混合调温室连接，所述的煤气混合调温室通过管道与所述旋风除尘器连接，所述的旋风除尘器通过管道与所述的余热装置连接，所述的余热装置通过管道与所述的高温布袋除尘器连接，所述的高温布袋除尘器通过管道将煤气提供给最终用户及现场使用,所述的风机通过低温煤气回流管路与煤气混合调温室和高温布袋除尘器连接，实现低温煤气的回流。The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to the present invention, a HIsmelt smelting reduction furnace high-temperature gas wet purification waste heat recovery system is changed to a HIsmelt smelting reduction furnace high temperature gas dry purification system based on the original HIsmelt smelting reduction furnace high temperature gas wet purification waste heat recovery system Purification waste heat recovery system, which retains the vaporization cooling flue, cyclone dust collector and waste heat device of the original HIsmelt smelting reduction furnace high-temperature gas wet purification waste heat recovery system, removes the gas cleaning device, and adds a gas mixing chamber and a high temperature cloth bag. A dust collector, a low-temperature gas return pipeline and a fan, wherein the high-temperature gas is cooled by the vaporization cooling flue, and then connected to the gas mixing and conditioning chamber, and the gas mixing and conditioning chamber is connected to the cyclone dust collector through a pipeline. The cyclone dust collector is connected to the waste heat device through a pipeline, the waste heat device is connected to the high temperature bag filter through a pipeline, and the high temperature bag filter provides gas to end users and on-site use through pipelines. The fan is connected with the gas mixing chamber and the high temperature bag filter through the low temperature gas return pipeline, so as to realize the return flow of the low temperature gas.
本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.
前述的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统，其中所述的煤气混合调温室所用调温介质为工艺本身所产生的煤气。In the aforementioned HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system, the temperature-regulating medium used in the gas-mixed gas-conditioning room is the gas generated by the process itself.
前述的一种HIsmelt熔融还原炉高温煤气干法净化余热回收系统，其中所述的高温布袋除尘器采用耐高温、耐腐蚀的高温滤筒作为精除尘元件，精除尘后烟尘浓度小于10mg/Nm3。The above-mentioned high-temperature gas dry purification waste heat recovery system of HIsmelt smelting reduction furnace, wherein the high-temperature bag filter adopts a high-temperature-resistant and corrosion-resistant high-temperature filter cartridge as a fine dust removal element, and the dust concentration after fine dust removal is less than 10mg/Nm 3 .
本发明的目的及解决其技术问题是采用以下技术方案来实现的。依据本发明提出的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统的新工艺，其特征在于其包括以下步骤：The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a new process of a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat recovery system proposed by the present invention, it is characterized in that it comprises the following steps:
步骤1：HIsmelt熔融还原炉高温煤气经过汽化冷却烟道回收余热及降温后温度达到800℃-900℃；Step 1: The high temperature gas of the HIsmelt smelting reduction furnace recovers the waste heat through the vaporization cooling flue and the temperature reaches 800℃-900℃ after cooling;
步骤2：温度达到800℃-900℃的高温煤气进入煤气混合调温室，该煤气混合调温室将汽化冷却烟道排出的高温煤气与低温煤气回流风抽回的低温煤气充分混合，将煤气温度调至工艺所需值；Step 2: The high-temperature gas whose temperature reaches 800℃-900℃ enters the gas mixing and conditioning room, which fully mixes the high-temperature gas discharged from the vaporization cooling flue with the low-temperature gas drawn back by the low-temperature gas return air, and adjusts the gas temperature. to the value required by the process;
步骤3：经所述煤气混合调温室调温后的煤气通过管道进入旋风除尘器进行初除尘,除去大颗粒粉尘；Step 3: the gas after the temperature adjustment of the gas mixing chamber enters the cyclone dust collector through the pipeline for initial dust removal to remove large particle dust;
步骤4：调温后煤气经过所述旋风除尘器进行初除尘后进入所述余热装置进行余热回收，由于是调温后的煤气，避免了余热装置粘渣；Step 4: After the temperature adjustment, the gas passes through the cyclone dust collector for initial dust removal and then enters the waste heat device for waste heat recovery. Since it is the gas after temperature adjustment, the waste heat device is prevented from sticking to slag;
步骤5：调温后的煤气经过余热装置进行余热回收后，进入高温布袋除尘器精除尘；Step 5: After the temperature-adjusted gas passes through the waste heat device for waste heat recovery, it enters the high temperature bag filter for fine dust removal;
步骤6：由高温布袋除尘器除尘后的煤气，直接供用户及现场使用点使用，利用其自身所带显热降低了用户的能源消耗。Step 6: The gas after being dedusted by the high temperature bag filter is directly used by the user and the on-site use point, and the energy consumption of the user is reduced by using its own sensible heat.
本发明与现有技术相比具有明显的优点和有益效果。其至少具有下列优点：Compared with the prior art, the present invention has obvious advantages and beneficial effects. It has at least the following advantages:
1、本发明采用低温煤气回流系统及煤气混合调温室，确保高温煤气进入旋风除尘器之前温度降至工艺所需温度。1. The present invention adopts a low temperature gas return system and a gas mixing chamber to ensure that the temperature of the high temperature gas before entering the cyclone dust collector is reduced to the temperature required by the process.
2、本发明可以解决余热装置粘渣问题，提高余热装置余热回收效率。2. The invention can solve the problem of slag sticking in the waste heat device and improve the waste heat recovery efficiency of the waste heat device.
3、本发明采用高温布袋除尘器干法除尘工艺，减少了水资源的浪费。3. The present invention adopts the dry dust removal process of the high temperature bag filter, which reduces the waste of water resources.
4、本发明提高了余热装置换热效率，增加使用寿命，4. The present invention improves the heat exchange efficiency of the waste heat device and increases the service life.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图,详细说明如下。The above description is only an overview of the technical solutions of the present invention, in order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand , the following specific preferred embodiments, and in conjunction with the accompanying drawings, are described in detail as follows.
附图说明Description of drawings
图1是本发明的组合结构示意图。Figure 1 is a schematic diagram of the combined structure of the present invention.
其中:in:
1:HIsmelt熔融还原炉1:HIsmelt smelting reduction furnace
2:汽化冷却烟道2: Vaporization cooling flue
3:煤气混合调温室3: Gas mixing room
4:旋风除尘器4: Cyclone dust collector
5:余热装置5: Waste heat device
6:高温布袋除尘器6: High temperature bag filter
7:风机7: Fan
具体实施方式Detailed ways
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例，对依据本发明提出的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统及新工艺，其具体的结构及实施方式、方法、特征及其功效，详细说明如后。In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, a kind of HIsmelt smelting reduction furnace high-temperature gas wet-to-dry purification waste heat proposed according to the present invention will be described. The recovery system and the new process, its specific structure and implementation, methods, features and effects, are described in detail as follows.
请参阅图1所示，本发明较佳实施例的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收系统，是在原HIsmelt熔融还原炉高温煤气湿法净化余热回收系统的基础上改为HIsmelt熔融还原炉高温煤气干法净化余热回收系统,该系统保留了原HIsmelt熔融还原炉高温煤气湿法净化余热回收系统的汽化冷却烟道2、旋风除尘器4和余热装置5,去掉了煤气清洗装置,增加了:煤气混合调温室3、高温布袋除尘器6、低温煤气回流管路及风机7,顺次连接的HIsmelt熔融还原炉1、汽化冷却烟道2、煤气混合调温室3、旋风除尘器4、余热装置器5、高温布袋除尘6、风机7。Please refer to Fig. 1, a kind of HIsmelt smelting reduction furnace high-temperature gas wet purification waste heat recovery system of a preferred embodiment of the present invention is modified on the basis of the original HIsmelt smelting reduction furnace high temperature gas wet purification waste heat recovery system It is a waste heat recovery system for high-temperature gas dry purification of HIsmelt smelting reduction furnace. The system retains the vaporization cooling flue 2, cyclone dust collector 4 and waste heat device 5 of the original HIsmelt smelting reduction furnace high-temperature gas wet purification waste heat recovery system, and the gas is removed. Cleaning device, added: gas mixing and conditioning chamber 3, high
其中汽化冷却烟道与煤气混合调温室3连接，煤气混合调温室3通过管道连接旋风除尘器4，旋风除尘器4通过管道与余热装置5连接，余热装置5通过管道与所述高温布袋除尘器6连接，高温布袋除尘器通过管道将煤气提供给最终用户及现场使用,风机7通过低温煤气回流管路与煤气混合调温室3和高温布袋除尘器6连接。The vaporization cooling flue is connected to the gas mixing and conditioning chamber 3, the gas mixing and conditioning chamber 3 is connected to the cyclone dust collector 4 through the pipeline, the cyclone dust collector 4 is connected to the waste heat device 5 through the pipeline, and the waste heat device 5 is connected to the high temperature bag filter through the pipeline. 6 Connection, the high temperature bag filter provides gas to end users and on-site use through the pipeline, and the fan 7 is connected to the gas mixing chamber 3 and the high
高温煤气经过汽化冷却烟道降温后，汽化冷却烟道2与所述煤气混合调温室3连接，煤气混合调温室3与旋风除尘器4连接，旋风除尘器4与余热装置5连接，余热装置5与高温布袋除尘器6连接，引风机7接通高温布袋除尘器6后，管道与煤气混合调温室3连接，实现低温煤气回流。After the high-temperature gas is cooled by the vaporization and cooling flue, the vaporization and cooling flue 2 is connected to the gas mixing and conditioning chamber 3, the gas mixing and conditioning chamber 3 is connected to the cyclone dust collector 4, the cyclone dust collector 4 is connected to the waste heat device 5, and the waste heat device 5 It is connected to the high
高温布袋除尘器将净化后的煤气，直接供至用户或提供现场使用。The high temperature bag filter will supply the purified gas directly to the user or provide it for on-site use.
其中，煤气混合调温室3将汽化冷却烟道排出的高温煤气与低温煤气回流系统抽回的低温煤气充分混合，将煤气温度调至工艺所需值,该煤气混合调温室3调温所用调温介质为工艺本身所产生的煤气。Among them, the gas mixing chamber 3 fully mixes the high temperature gas discharged from the vaporization cooling flue with the low temperature gas drawn back by the low temperature gas return system, and adjusts the gas temperature to the value required by the process. The gas mixing chamber 3 is used for temperature adjustment. The medium is the gas produced by the process itself.
高温布袋除尘器5采用耐高温、耐腐蚀的高温滤筒作为精除尘元件，精除尘后烟尘浓度小于10mg/Nm3。The high temperature bag filter 5 adopts a high temperature resistant and corrosion resistant high temperature filter cartridge as the fine dust removal element, and the dust concentration after fine dust removal is less than 10mg/Nm 3 .
本发明提供的一种HIsmelt熔融还原炉高温煤气湿法改干法净化余热回收新工艺的流程步骤如下：The process steps of a new technology for purifying waste heat recovery by a HIsmelt smelting reduction furnace high-temperature gas wet-to-dry method provided by the invention are as follows:
HIsmelt熔融还原炉1的高温煤气经过汽化冷却烟道2回收余热及降温后温度达到800℃-900℃，温度达到800℃-900℃的高温煤气进入煤气混合调温室3，该煤气混合调温室3将汽化冷却烟道2排出高温煤气与低温煤气回流风抽回的低温煤气充分混合，将煤气温度调至工艺所需值；经煤气混合调温室3调温后的煤气通过管道进入旋风除尘器4进行初除尘，除去大颗粒粉尘；经过初除尘后的煤气进入余热回收装置5，进行余热回收，由于是调温后的煤气，避免了预热装置5粘渣，调温后的煤气通过管道进入高温布袋除尘器6，进行精除尘，高温布袋除尘器6采用耐高温、耐腐蚀的高温滤筒作为精除尘元件，经高温布袋除尘器6精除尘后烟尘浓度小于 10mg/Nm3,净化后煤气供用户及现场使用，利用其自身所带显热降低了用户的能源消耗。The high-temperature gas in the HIsmelt smelting reduction furnace 1 recovers the waste heat and cools down through the vaporization cooling flue 2, and the temperature reaches 800°C-900°C. The high temperature gas discharged from the vaporization cooling flue 2 is fully mixed with the low temperature gas drawn back by the low temperature gas return air, and the gas temperature is adjusted to the value required by the process; Carry out primary dust removal to remove large particles of dust; the gas after primary dust removal enters the waste heat recovery device 5 for waste heat recovery. Because it is the gas after temperature adjustment, the slag sticking of the preheating device 5 is avoided, and the gas after temperature adjustment enters through the pipeline. The high
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，例如煤气混合调温室可以根据现场情况进行增减。虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明,任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. For example, the gas mixing chamber can be increased or decreased according to the on-site conditions. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make some modifications by using the technical content disclosed above. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still belong to the technology of the present invention within the scope of the programme.
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