CN109099715B - A kind of recuperative heater for removing heat storage based on flue gas - Google Patents

A kind of recuperative heater for removing heat storage based on flue gas Download PDF

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CN109099715B
CN109099715B CN201710474893.7A CN201710474893A CN109099715B CN 109099715 B CN109099715 B CN 109099715B CN 201710474893 A CN201710474893 A CN 201710474893A CN 109099715 B CN109099715 B CN 109099715B
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pipeline
opening
gas
reversing valve
way reversing
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CN109099715A (en
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王子兵
张玉柱
邢宏伟
王乙竹
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North China University of Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10Arrangements for using waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10Arrangements for using waste heat
    • F27D17/12Arrangements for using waste heat using heat storage
    • F27D17/13Arrangements for using waste heat using heat storage using regenerative heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20Arrangements for treatment or cleaning of waste gases

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

Abstract

本发明公开了一种基于烟气清除蓄热体的蓄热式加热炉,蓄热式加热炉在停止供入煤气和空气的那一刻,将第二气口的烟气引入第一气口,对蓄热体及相关管道中的残留煤气进行吹扫清除。蓄热式加热炉切换烟气流动方向时没有换向导致的残余煤气放散到大气之中,解决了现有蓄热式加热炉有害气体技术性排放、严重污染环境的问题以及比较严重的优质煤气的技术性浪费问题。

The invention discloses a regenerative heating furnace based on a flue gas removing a regenerative body. The regenerative heating furnace introduces the flue gas from the second gas port into the first gas port at the moment when the supply of coal gas and air is stopped, and the regenerative heating furnace has no effect on the storage. The residual gas in the hot body and related pipelines is purged and removed. When the regenerative heating furnace switches the flue gas flow direction, the residual gas caused by no reversal is released into the atmosphere, which solves the problems of technical emission of harmful gases, serious environmental pollution and serious pollution of high-quality gas in the existing regenerative heating furnaces. technical waste.

Description

一种基于烟气清除蓄热体的蓄热式加热炉A regenerative heating furnace based on flue gas removal regenerator

技术领域technical field

本发明属于蓄热式加热炉节能减排技术领域,具体来说涉及一种基于烟气清除蓄热体的蓄热式加热炉。The invention belongs to the technical field of energy saving and emission reduction of regenerative heating furnaces, and in particular relates to a regenerative heating furnace based on flue gas removing a regenerative body.

背景技术Background technique

钢铁工业及建材行业生产中,有大量的蓄热式加热炉承担着繁重的物料加热任务。蓄热式加热炉采用换向燃烧技术实现高温余热回收及低热值煤气的高温预热,该技术最大的优点就是以较小的占地面积实现了高温余热(烟温高达1200℃以上)的高效回收,同时实现了低热值煤气的高温度预热(预热温度高达900℃-1000℃),以轧钢蓄热式加热炉为例,轧钢蓄热式加热炉一般燃用高炉煤气(CO含量20%-30%)和转炉煤气(CO含量60%-80%),其高温烟气余热回收原理:几十对蓄热体在加热炉两侧对称布置,当燃料与空气从炉膛一侧(定义为A侧)喷入时,燃料及空气被该侧高温蓄热体预热至900℃以上,然后进入加热炉炉膛燃烧,燃烧产物与钢坯换热后由炉膛另一侧(定义为B侧)经蓄热体排出,高温烟气经过该侧蓄热体时向蓄热体放热,将蓄热体加热至高温(最高温度1000℃以上)。运行一段时间以后(一般为90s左右),煤气-烟气流动方向通过换向阀切换,燃料与空气改由炉膛B侧喷入,烟气则改由A侧引出口,蓄热式加热炉在不停的切换中实现低热值燃料的高温预热及高温烟气余热的高效回收。In the production of iron and steel industry and building materials industry, a large number of regenerative heating furnaces undertake heavy material heating tasks. The regenerative heating furnace adopts the reversing combustion technology to realize the high temperature waste heat recovery and the high temperature preheating of the low calorific value gas. At the same time, high-temperature preheating of low calorific value gas (preheating temperature up to 900℃-1000℃) is realized. Taking the regenerative heating furnace for steel rolling as an example, the regenerative heating furnace for steel rolling generally uses blast furnace gas (CO content 20 %-30%) and converter gas (CO content 60%-80%), the principle of high-temperature flue gas waste heat recovery: dozens of pairs of regenerators are arranged symmetrically on both sides of the heating furnace, when the fuel and air flow from one side of the furnace (definition When it is injected into the A side), the fuel and air are preheated to above 900 ℃ by the high temperature regenerator on this side, and then enter the heating furnace for combustion. After being discharged from the heat accumulator, the high-temperature flue gas will release heat to the heat accumulator when passing through the heat accumulator on this side, and heat the heat accumulator to a high temperature (the maximum temperature is above 1000°C). After running for a period of time (usually about 90s), the gas-flue gas flow direction is switched through the reversing valve, the fuel and air are injected from the B side of the furnace, and the flue gas is switched from the A side outlet. High-temperature preheating of low calorific value fuel and efficient recovery of high-temperature flue gas waste heat are realized in the continuous switching.

但该技术也存在出非常严重的技术缺陷,在蓄热式加热炉换向过程中,燃烧器一侧的蓄热体切换为烟气排出烟道,这种转换将导致该侧蓄热体及换向阀至蓄热体间管道中残留的煤气排放至大气中。以轧钢蓄热式加热炉为例说明该技术的缺陷:However, this technology also has very serious technical defects. During the reversing process of the regenerative heating furnace, the regenerator on one side of the burner is switched to the flue gas discharge flue. The gas remaining in the pipeline between the reversing valve and the regenerator is discharged to the atmosphere. Take the steel rolling regenerative heating furnace as an example to illustrate the defects of this technology:

1)每次切换将有大量的有毒煤气排放至大气中,造成非常严重的有害气体(CO具有很高的毒性)技术性排放。1) A large amount of toxic gas will be discharged into the atmosphere each time it is switched, resulting in very serious technical discharge of harmful gas (CO has high toxicity).

2)每次切换将有一定量的煤气没有燃烧即排放至大气中,造成优质煤气燃料的技术性浪费。2) Each switch will discharge a certain amount of gas into the atmosphere without combustion, resulting in a technical waste of high-quality gas fuel.

以某中型加热炉为例,共80对蓄热体,每对蓄热体与相关管道的体积按0.3Nm3,每次换向将有24Nm3的煤气放散到空气中,每年将有7603200Nm3煤气排入大气中,按发热量1000Kcal/Nm3,折合标煤1086.4吨,按CO含量25%计算,将有1900800Nm3煤气排入大气中,一座加热炉换向排放的有毒气体相当于一个200万人口的中型城市每个人一年呼吸1的CO,对环境造成的污染触目惊心。Taking a medium-sized heating furnace as an example, there are 80 pairs of regenerators in total. The volume of each pair of regenerators and related pipes is 0.3Nm 3 , and 24Nm 3 of gas will be released into the air for each reversal. The gas is discharged into the atmosphere. According to the calorific value of 1000Kcal/Nm 3 , which is equivalent to 1086.4 tons of standard coal, and calculated according to the CO content of 25%, 1,900,800Nm 3 of gas will be discharged into the atmosphere. Each person in a medium-sized city with a population of 10,000 breathes 1 CO per year, causing shocking pollution to the environment.

发明内容SUMMARY OF THE INVENTION

针对现有技术中蓄热式加热炉换向过程排放煤气的问题,本发明的目的在于提供一种基于烟气清除蓄热体的蓄热式加热炉。In view of the problem of gas discharge in the reversing process of the regenerative heating furnace in the prior art, the purpose of the present invention is to provide a regenerative heating furnace based on the removal of the regenerative body based on the flue gas.

本发明的目的是通过下述技术方案予以实现的。The purpose of the present invention is achieved through the following technical solutions.

一种基于烟气清除蓄热体的蓄热式加热炉,包括:炉体、第一四通换向阀、第二四通换向阀、第一三通换向阀和第二三通换向阀,在所述炉体的一侧形成有第一开口和第二开口,所述炉体的另一侧形成有第三开口和第四开口,所述第一开口连通有第一管路,所述第二开口连通有第二管路,所述第三开口连通有第三管路,所述第四开口连通有第四管路,所述第一四通换向阀分别连通所述第一管路、第三管路、第五管路和第六管路,以使所述第一管路与所述第五管路和第六管路中的一根管路连通且所述第三管路与所述第五管路和第六管路中的另一根管路连通;所述第二四通换向阀分别连通所述第二管路、第四管路、第七管路和第八管路,以使所述第二管路与所述第七管路和第八管路中的一根管路连通且所述第四管路与所述第七管路和第八管路中的另一根管路连通;所述第一三通换向阀分别与进空气管路、第一吹风管路和第五管路连通,以使所述第五管路能够与所述进空气管路和第一吹风管路中的任意一根管路连通,其中,所述进空气管路上安装有一第一加压机,所述第一吹风管路的另一端口与所述第六管路连通,且在所述第一吹风管路上安装有一第一风机;所述第二三通换向阀分别与进煤气管路、第二吹风管路和第七管路连通,以使所述第七管路能够与所述进煤气管路和第二吹风管路中的任意一根连通,其中,所述进煤气管路上安装有一第二加压机,所述第二吹风管路的另一端口与所述第八管路连通,且在所述第二吹风管路上安装有一第二风机;A regenerative heating furnace based on a flue gas removal regenerator, comprising: a furnace body, a first four-way reversing valve, a second four-way reversing valve, a first three-way reversing valve and a second three-way reversing valve A direction valve, a first opening and a second opening are formed on one side of the furnace body, a third opening and a fourth opening are formed on the other side of the furnace body, and the first opening communicates with a first pipeline , the second opening is connected with a second pipeline, the third opening is connected with a third pipeline, the fourth opening is connected with a fourth pipeline, and the first four-way reversing valve is connected with the the first pipeline, the third pipeline, the fifth pipeline and the sixth pipeline, so that the first pipeline is communicated with one of the fifth pipeline and the sixth pipeline and the The third pipeline communicates with the other of the fifth pipeline and the sixth pipeline; the second four-way reversing valve communicates with the second pipeline, the fourth pipeline and the seventh pipeline respectively. pipeline and an eighth pipeline, so that the second pipeline communicates with one of the seventh pipeline and the eighth pipeline and the fourth pipeline communicates with the seventh pipeline and The other pipeline in the eighth pipeline is connected; the first three-way reversing valve is connected with the air inlet pipeline, the first blowing pipeline and the fifth pipeline respectively, so that the fifth pipeline can be It is communicated with any one of the air inlet pipeline and the first blowing pipeline, wherein a first compressor is installed on the air inlet pipeline, and the other port of the first blowing pipeline is connected to The sixth pipeline is connected, and a first fan is installed on the first blowing pipeline; the second three-way reversing valve is connected with the gas inlet pipeline, the second blowing pipeline and the seventh pipeline respectively , so that the seventh pipeline can be communicated with any one of the gas inlet pipeline and the second blowing pipeline, wherein a second compressor is installed on the gas inlet pipeline, and the second The other port of the blowing pipeline is communicated with the eighth pipeline, and a second fan is installed on the second blowing pipeline;

在所述第一开口、第二开口、第三开口和第四开口上均安装有蓄热体,以使经过所述第一开口、第二开口、第三开口和第四开口的气体分别能经过相应开口的蓄热体。A heat storage body is installed on the first opening, the second opening, the third opening and the fourth opening, so that the gas passing through the first opening, the second opening, the third opening and the fourth opening can respectively Regenerators passing through corresponding openings.

在上述技术方案中,在所述第一吹风管路与所述第一四通换向阀之间的第六管路上安装有一第一引风机。In the above technical solution, a first induced draft fan is installed on the sixth pipeline between the first blowing pipeline and the first four-way reversing valve.

在上述技术方案中,在所述第二吹风管路与所述第二四通换向阀之间的第八管路上安装有一第二引风机。In the above technical solution, a second induced draft fan is installed on the eighth pipeline between the second blowing pipeline and the second four-way reversing valve.

在上述技术方案中,所述第六管路和第八管路的端口分别固装有一烟囱。In the above technical solution, the ports of the sixth pipeline and the eighth pipeline are respectively fixed with a chimney.

上述蓄热式加热炉的使用方法,包括以下步骤:The use method of the above-mentioned regenerative heating furnace includes the following steps:

1)调节所述第一三通换向阀和第二三通换向阀,使所述第五管路与所述进空气管路连通,所述第七管路与所述进煤气管路连通;1) Adjust the first three-way reversing valve and the second three-way reversing valve to make the fifth pipeline communicate with the air inlet pipeline, and the seventh pipeline and the gas inlet pipeline connected;

2)调节所述第一四通换向阀,使所述第一管路与所述第五管路连通,所述第六管路与所述第三管路连通;调节所述第二四通换向阀,使所述第二管路与所述第七管路连通,所述第四管路与所述第八管路连通,开启第一加压机和第二加压机,使煤气和空气分别通入相应的所述进煤气管路和进空气管路;2) Adjust the first four-way reversing valve to connect the first pipeline with the fifth pipeline, and connect the sixth pipeline with the third pipeline; adjust the second four-way valve Open the reversing valve to make the second pipeline communicate with the seventh pipeline, the fourth pipeline and the eighth pipeline, open the first compressor and the second compressor, so that the Coal gas and air are respectively introduced into the corresponding gas inlet pipeline and air inlet pipeline;

3)切换烟气(此烟气混有煤气)流动方向:使煤气和空气分别停止通入相应的所述进煤气管路和进空气管路中,关闭第一加压机和第二加压机,调节所述第一三通换向阀和第二三通换向阀,使所述第五管路与所述第一吹风管路连通,所述第七管路与所述第二吹风管路连通;开启第一风机和第二风机,保持N秒后关闭所述第一风机和第二风机;3) Switch the flow direction of the flue gas (the flue gas is mixed with coal gas): stop the gas and air from entering the corresponding gas inlet pipelines and air inlet pipelines respectively, close the first pressurizer and the second pressurizer machine, adjust the first three-way reversing valve and the second three-way reversing valve, so that the fifth pipeline is connected with the first blowing pipeline, and the seventh pipeline is connected with the second blowing pipeline The pipeline is connected; the first fan and the second fan are turned on, and the first fan and the second fan are turned off after N seconds;

4)调节所述第一三通换向阀和第二三通换向阀,使所述第五管路与所述进空气管路连通,所述第七管路与所述进煤气管路连通;调节所述第一四通换向阀,使所述第一管路与所述第六管路连通,所述第五管路与所述第三管路连通;调节所述第二四通换向阀,使所述第二管路与所述第八管路连通,所述第四管路与所述第七管路连通,开启第一加压机和第二加压机,使煤气和空气分别通入相应的所述进煤气管路和进空气管路。4) Adjust the first three-way reversing valve and the second three-way reversing valve to make the fifth pipeline communicate with the air inlet pipeline, and the seventh pipeline and the gas inlet pipeline Connect; adjust the first four-way reversing valve to make the first pipeline communicate with the sixth pipeline, and the fifth pipeline communicate with the third pipeline; adjust the second four-way valve Connect the reversing valve to make the second pipeline communicate with the eighth pipeline, the fourth pipeline and the seventh pipeline, open the first compressor and the second compressor, so that the Coal gas and air are respectively introduced into the corresponding gas inlet pipelines and air inlet pipelines.

在上述技术方案中,所述N小于等于600秒。In the above technical solution, the N is less than or equal to 600 seconds.

相比于现有技术,本发明的蓄热式加热炉的有益效果为:Compared with the prior art, the beneficial effects of the regenerative heating furnace of the present invention are:

蓄热式加热炉切换烟气流动方向时没有换向导致的残余煤气放散到大气之中,解决了现有蓄热式加热炉有害气体技术性排放、严重污染环境的问题以及比较严重的优质煤气的技术性浪费问题。When the regenerative heating furnace switches the flue gas flow direction, the residual gas caused by no reversal is released into the atmosphere, which solves the technical emission of harmful gases in the existing regenerative heating furnace, serious environmental pollution, and relatively serious problems of high-quality gas. Technical waste.

附图说明Description of drawings

图1为本发明的蓄热式加热炉工作状态示意图;Fig. 1 is the working state schematic diagram of the regenerative heating furnace of the present invention;

图2为本发明的蓄热式加热炉吹扫时状态示意图;Fig. 2 is the state schematic diagram when the regenerative heating furnace of the present invention is purged;

图3为本发明的蓄热式加热炉切换完毕后工作状态示意图。FIG. 3 is a schematic diagram of the working state of the regenerative heating furnace of the present invention after switching is completed.

其中,in,

1:第二开口 2:第一开口 3:炉体 4:火焰1: Second opening 2: First opening 3: Furnace body 4: Flame

5:第四开口 6:第三开口 7:第二加压机5: Fourth opening 6: Third opening 7: Second press

8:第二三通换向阀 9:烟囱 10:第二引风机8: Second three-way reversing valve 9: Chimney 10: Second induced draft fan

11:第二四通换向阀 12:第一四通换向阀 13:第一引风机11: The second four-way reversing valve 12: The first four-way reversing valve 13: The first induced draft fan

14:第一三通换向阀 15:第一管路 16:第一加压机14: The first three-way reversing valve 15: The first pipeline 16: The first compressor

17:第二风机 18:第一风机 19:第二管路17: Second fan 18: First fan 19: Second pipeline

20:第五管路 21:第六管路 22:第三管路20: Fifth pipeline 21: Sixth pipeline 22: Third pipeline

23:第七管路 24:第四管路 25:第八管路23: Seventh line 24: Fourth line 25: Eighth line

26:进空气管路 27:第一吹风管路 28:进煤气管路26: Inlet air line 27: First blowing line 28: Inlet gas line

29:第二吹风管路。29: The second blowing line.

具体实施方式Detailed ways

在本发明的描述中,需要说明的是,术语“上”、“下”、“左”、“右”等指示的方位或位置关系均为基于附图所示的方位或位置关系,或者是该发明使用时惯常摆放的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,术语“第一”、“第二”、“第三”等仅用于区分描述,而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are all based on the orientations or positional relationships shown in the drawings, or are The orientation or positional relationship that is usually placed when the invention is used is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

一种利用烟气清除蓄热式加热炉中蓄热体及相应管道内换向残留煤气的方法,包括以下步骤:A method for using flue gas to remove a regenerator and reversing residual gas in a regenerative heating furnace in a regenerative heating furnace, comprising the following steps:

①使煤气和助燃的空气经过炉体上的第一气口通入该炉体内,煤气和空气在炉体内燃烧形成烟气,烟气经过炉体上的第二气口排出至炉体外;① Make the gas and combustion-supporting air pass into the furnace body through the first air port on the furnace body, the gas and air are burned in the furnace body to form flue gas, and the flue gas is discharged to the outside of the furnace body through the second air port on the furnace body;

②停止向炉体内通入煤气和空气,将第二气口此时排出的烟气从第一气口引入炉体内,保持N秒,N小于等于600秒;(在停止供入煤气和空气的那一刻,将第二气口的烟气引入第一气口,对蓄热体及相关管道中的残留煤气进行吹扫清除)。② Stop feeding gas and air into the furnace body, and introduce the flue gas discharged from the second gas port into the furnace body from the first gas port for N seconds, and N is less than or equal to 600 seconds; (at the moment when the supply of gas and air is stopped , the flue gas from the second gas port is introduced into the first gas port, and the residual gas in the regenerator and related pipelines is purged and removed).

优选的,在步骤②中,将烟气加压引入炉体内。Preferably, in step ②, the flue gas is pressurized and introduced into the furnace body.

③再次向炉体内通入煤气和空气:使煤气和空气经过第二气口进入炉体内,煤气和空气在炉体内燃烧形成烟气,烟气经过炉体上的第一气口排出至炉体外;③Introduce gas and air into the furnace body again: make the gas and air enter the furnace body through the second gas port, the gas and air are burned in the furnace body to form flue gas, and the flue gas is discharged to the outside of the furnace body through the first gas port on the furnace body;

其中,第一气口的数量为至少1个,第二气口的数量为至少1个,第一气口和第二气口上均安装有蓄热体。Wherein, the number of the first air port is at least one, the number of the second air port is at least one, and a heat storage body is installed on both the first air port and the second air port.

在步骤③后,重复步骤①~③。After step ③, repeat steps ① to ③.

可通过下述蓄热式加热炉实现上述方法。如图1~3所示,包括:炉体3、第一四通换向阀12、第二四通换向阀11、第一三通换向阀14和第二三通换向阀8,在炉体3的一侧形成有第一开口2和第二开口1(相当于方法中的第一气口),炉体3的另一侧形成有第三开口6和第四开口5(相当于方法中的第二气口),第一开口2连通第一管路15,第二开口1连通第二管路19,第三开口6连通有第三管路22,第四开口5连通有第四管路24,第一四通换向阀12分别连通有第一管路15、第三管路22、第五管路20和第六管路21,以使第一管路15与第五管路20和第六管路21中的一根管路连通且第三管路22与第五管路20和第六管路21中的另一根管路连通;第二四通换向阀11分别连通有第二管路19、第四管路24、第七管路23和第八管路25,以使第二管路19与第七管路23和第八管路25中的一根管路连通且第四管路24与第七管路23和第八管路25中的另一根管路连通;第一三通换向阀14分别与进空气管路26、第一吹风管路27和第五管路20连通,以使第五管路20能够与进空气管路26和第一吹风管路27中的任意一根管路连通,其中,进空气管路26上安装有一第一加压机16,第一吹风管路27的另一端口与第六管路21连通,且在第一吹风管路27上安装有一第一风机18;第二三通换向阀8分别与进煤气管路28、第二吹风管路29和第七管路23连通,以使第七管路23能够与进煤气管路28和第二吹风管路29中的任意一根连通,其中,进煤气管路28上安装有一第二加压机7,第二吹风管路29的另一端口与第八管路25连通,且在第二吹风管路29上安装有一第二风机17;The above method can be realized by the following regenerative heating furnace. As shown in Figures 1 to 3, it includes: a furnace body 3, a first four-way reversing valve 12, a second four-way reversing valve 11, a first three-way reversing valve 14 and a second three-way reversing valve 8, A first opening 2 and a second opening 1 (equivalent to the first gas port in the method) are formed on one side of the furnace body 3 , and a third opening 6 and a fourth opening 5 (equivalent to the first gas port in the method) are formed on the other side of the furnace body 3 The second air port in the method), the first opening 2 is connected to the first pipeline 15, the second opening 1 is connected to the second pipeline 19, the third opening 6 is connected to the third pipeline 22, and the fourth opening 5 is connected to the fourth pipeline. Pipeline 24, the first four-way reversing valve 12 is respectively connected with the first pipeline 15, the third pipeline 22, the fifth pipeline 20 and the sixth pipeline 21, so that the first pipeline 15 and the fifth pipeline The second four-way reversing valve 11 The second pipeline 19 , the fourth pipeline 24 , the seventh pipeline 23 and the eighth pipeline 25 are respectively connected, so that the second pipeline 19 is connected to one of the seventh pipeline 23 and the eighth pipeline 25 The pipelines are connected and the fourth pipeline 24 is connected with another pipeline in the seventh pipeline 23 and the eighth pipeline 25; the first three-way reversing valve 14 is respectively connected with the air inlet pipeline 26 and the first blowing pipe The pipeline 27 is connected with the fifth pipeline 20, so that the fifth pipeline 20 can be communicated with any one of the air inlet pipeline 26 and the first blowing pipeline 27, wherein the air inlet pipeline 26 is installed with a In the first compressor 16, the other port of the first blowing line 27 is communicated with the sixth line 21, and a first blower 18 is installed on the first blowing line 27; the second three-way reversing valve 8 is respectively It communicates with the gas inlet pipeline 28, the second blowing pipeline 29 and the seventh pipeline 23, so that the seventh pipeline 23 can communicate with any one of the gas inlet pipeline 28 and the second blowing pipeline 29, wherein , a second compressor 7 is installed on the gas inlet pipeline 28, the other port of the second blowing pipeline 29 is communicated with the eighth pipeline 25, and a second blower 17 is installed on the second blowing pipeline 29;

在第一开口2、第二开口1、第三开口6和第四开口5上均安装有蓄热体,以使经过第一开口2、第二开口1、第三开口6和第四开口5的气体分别能经过相应开口的蓄热体。A heat storage body is installed on the first opening 2 , the second opening 1 , the third opening 6 and the fourth opening 5 so as to pass through the first opening 2 , the second opening 1 , the third opening 6 and the fourth opening 5 The gas can respectively pass through the corresponding opening of the heat storage body.

优选的,在第一吹风管路27与第一四通换向阀12之间的第六管路21上安装有一第一引风机13。Preferably, a first induced draft fan 13 is installed on the sixth pipeline 21 between the first blowing pipeline 27 and the first four-way reversing valve 12 .

优选的,在第二吹风管路29与第二四通换向阀11之间的第八管路25上安装有一第二引风机10。Preferably, a second induced draft fan 10 is installed on the eighth pipeline 25 between the second blowing pipeline 29 and the second four-way reversing valve 11 .

优选的,第六管路21和第八管路25的端口分别安装有一烟囱9。Preferably, a chimney 9 is respectively installed at the ports of the sixth pipeline 21 and the eighth pipeline 25 .

如上述蓄热式加热炉的使用方法,包括以下步骤:The use method of the above-mentioned regenerative heating furnace includes the following steps:

1)调节第一三通换向阀14和第二三通换向阀8,使第五管路20与进空气管路26连通,第七管路23与进煤气管路28连通;1) Adjust the first three-way reversing valve 14 and the second three-way reversing valve 8, so that the fifth pipeline 20 is connected with the air inlet pipeline 26, and the seventh pipeline 23 is connected with the gas inlet pipeline 28;

2)调节第一四通换向阀12,使第一管路15与第五管路20连通,第六管路21与第三管路22连通;调节第二四通换向阀11,使第二管路19与第七管路23连通,第四管路24与第八管路25连通,开启第一加压机16和第二加压机7,使煤气和空气分别通入相应的进煤气管路28和进空气管路26;2) Adjust the first four-way reversing valve 12 to make the first pipeline 15 communicate with the fifth pipeline 20, and the sixth pipeline 21 and the third pipeline 22; adjust the second four-way reversing valve 11 to make the The second pipeline 19 is connected to the seventh pipeline 23, the fourth pipeline 24 is connected to the eighth pipeline 25, the first compressor 16 and the second compressor 7 are turned on, and the gas and air are respectively introduced into the corresponding The gas inlet pipeline 28 and the inlet air pipeline 26;

3)切换烟气流动方向:使煤气和空气分别停止通入相应的进煤气管路28和进空气管路26中,关闭第一加压机16和第二加压机7,调节第一三通换向阀14和第二三通换向阀8,使第五管路20与第一吹风管路27连通,第七管路23与第二吹风管路29连通;开启第一风机18和第二风机17,保持N秒后关闭第一风机18和第二风机17;N小于等于600秒。3) Switch the flow direction of the flue gas: stop the gas and air from entering the corresponding gas inlet pipeline 28 and air inlet pipeline 26 respectively, close the first compressor 16 and the second compressor 7, adjust the first three Through the reversing valve 14 and the second three-way reversing valve 8, the fifth pipeline 20 is connected with the first blowing pipeline 27, and the seventh pipeline 23 is connected with the second blowing pipeline 29; open the first fan 18 and For the second fan 17, the first fan 18 and the second fan 17 are turned off after N seconds; N is less than or equal to 600 seconds.

4)调节第一三通换向阀14和第二三通换向阀8,使第五管路20与进空气管路26连通,第七管路23与进煤气管路28连通;调节第一四通换向阀12,使第一管路15与第六管路21连通,第五管路20与第三管路22连通;调节第二四通换向阀11,使第二管路19与第八管路25连通,第四管路24与第七管路23连通,开启第一加压机16和第二加压机7,使煤气和空气分别通入相应的进煤气管路28和进空气管路26。4) Adjust the first three-way reversing valve 14 and the second three-way reversing valve 8, so that the fifth pipeline 20 is connected with the air inlet pipeline 26, and the seventh pipeline 23 is connected with the gas inlet pipeline 28; A four-way reversing valve 12 makes the first pipeline 15 communicate with the sixth pipeline 21, and the fifth pipeline 20 communicates with the third pipeline 22; adjust the second four-way reversing valve 11, so that the second pipeline 19 is connected to the eighth pipeline 25, the fourth pipeline 24 is connected to the seventh pipeline 23, the first compressor 16 and the second compressor 7 are turned on, and the gas and air are respectively passed into the corresponding gas inlet pipelines 28 and intake air line 26.

重复步骤1)~4)。Repeat steps 1) to 4).

下面结合具体实施例进一步说明本发明的技术方案。The technical solutions of the present invention are further described below in conjunction with specific embodiments.

如附图1,某一时刻,蓄热式加热炉左侧为燃烧侧,煤气和助燃的空气从加热炉炉膛第一开口(进煤气)和第二开口(进空气)喷入,位于第一开口和第二开口的蓄热体向煤气和空气放热,以预热相应的空气和煤气。蓄热式加热炉的右侧为烟气排出侧,即高温烟气余热回收侧,高温烟气向(图中右侧的)蓄热体放热后,烟气从炉体右侧的第三开口和第四开口引出。As shown in Figure 1, at a certain moment, the left side of the regenerative heating furnace is the combustion side, and gas and combustion-supporting air are injected from the first opening (gas inlet) and the second opening (air inlet) of the furnace hearth, located in the first The regenerators of the opening and the second opening release heat to the gas and air to preheat the corresponding air and gas. The right side of the regenerative heating furnace is the flue gas discharge side, that is, the waste heat recovery side of the high-temperature flue gas. The opening and the fourth opening lead out.

此时换向阀的位置:第二三通换向阀8处于煤气接通位置,第二四通换向阀11处于能够使第二开口1接通煤气的位置,即进煤气管路28与第七管路23连通,第七管路23与第二管路19连通;此时,第四管路与第八管路连通,使第二引风机10与第四开口5接通。第一三通换向阀14处于与空气接通的位置,第一四通换向阀12处于与第一开口接通,即进空气管路与第五管路连通,第五管路20与第一管路15连通;此时,第六管路21与第三管路22连通,使第一引风机13与第三开口接通。The position of the reversing valve at this time: the second three-way reversing valve 8 is in the gas connection position, and the second four-way reversing valve 11 is in the position where the second opening 1 can be connected to the gas, that is, the gas inlet pipeline 28 is connected to the gas. The seventh pipeline 23 is connected, and the seventh pipeline 23 is connected with the second pipeline 19 ; at this time, the fourth pipeline is connected with the eighth pipeline, so that the second induced draft fan 10 is connected with the fourth opening 5 . The first three-way reversing valve 14 is in a position connected to the air, and the first four-way reversing valve 12 is connected to the first opening, that is, the air inlet pipeline is connected to the fifth pipeline, and the fifth pipeline 20 is connected to the first opening. The first pipeline 15 is connected; at this time, the sixth pipeline 21 is connected with the third pipeline 22, so that the first induced draft fan 13 is connected with the third opening.

煤气流程:煤气经第二加压机7加压后,进入第二三通换向阀8后,继续流过第二四通换向阀11,然后经过第二管路19进入第二开口1并经过该第二开口处的蓄热体,煤气与蓄热体换热升温喷入炉体3内燃烧,产生火焰4。Gas flow: After the gas is pressurized by the second pressurizer 7, the gas enters the second three-way reversing valve 8, continues to flow through the second four-way reversing valve 11, and then enters the second opening 1 through the second pipeline 19. After passing through the regenerator at the second opening, the gas and the regenerator exchange heat and heat up and are sprayed into the furnace body 3 for combustion to generate a flame 4 .

助燃空气流程:空气经第一加压机16加压后,进入第一三通换向阀14,再流经第一四通换向阀12,然后经过第一管路15进入第一开口2,并与该第一开口处的蓄热体换热升温,然后进入炉体3内助燃。Combustion-supporting air flow: after the air is pressurized by the first compressor 16, it enters the first three-way reversing valve 14, then flows through the first four-way reversing valve 12, and then enters the first opening 2 through the first pipeline 15. , and exchange heat with the regenerator at the first opening to raise the temperature, and then enter the furnace body 3 to support combustion.

烟气流程:煤气和助燃的空气燃烧形成4火焰,火焰4形成的烟气分别从第四开口5和第三开口流出且经过相应开口的蓄热体,分别经过第三管路和第四管路并通过相应的第二四通换向阀11和第一四通换向阀12流入烟囱9,烟气流动的动力分别来自第二引风机10和第一引风机13。Flue gas process: gas and combustion-supporting air are burned to form 4 flames, and the flue gas formed by flame 4 flows out from the fourth opening 5 and the third opening respectively and passes through the regenerator of the corresponding opening, passing through the third pipeline and the fourth pipeline respectively. The flue gas flows into the chimney 9 through the corresponding second four-way reversing valve 11 and the first four-way reversing valve 12. The power of the flue gas flow comes from the second induced draft fan 10 and the first induced draft fan 13 respectively.

如附图2,蓄热式加热炉工作一段时间后,燃烧侧与烟气排出侧需要进行换向,即切换烟气流动方向。换向开始时,第二三通换向阀8和第一三通换向阀14同时分别切换至与第二风机17和第一风机18连通状态,即第五管路与第一吹风管路连通,第七管路与第二吹风管路连通。此时,烟气在第二风机17和第一风机18加压作用下分别对第二开口1处的蓄热体、第二四通换向阀11及其连接管路中积存的残留煤气,及第一四通换向阀12、第一开口2处的蓄热体及其连接管路中积存的残留空气进行吹扫,吹扫后进入炉体3的煤气及空气在炉体内燃烧完全。As shown in Figure 2, after the regenerative heating furnace works for a period of time, the combustion side and the flue gas discharge side need to be reversed, that is, to switch the flue gas flow direction. When the reversing starts, the second three-way reversing valve 8 and the first three-way reversing valve 14 are switched to communicate with the second fan 17 and the first fan 18 respectively at the same time, that is, the fifth pipeline is connected to the first blowing pipeline. communication, and the seventh pipeline communicates with the second blowing pipeline. At this time, the flue gas is pressurized by the second fan 17 and the first fan 18 to the regenerator at the second opening 1, the second four-way reversing valve 11 and the residual gas accumulated in the connecting pipeline, respectively, and the first four-way reversing valve 12, the regenerator at the first opening 2 and the residual air accumulated in the connecting pipeline are purged, and the gas and air entering the furnace body 3 after purging are completely burned in the furnace body.

如附图3,当残留煤气被全部吹扫进入炉膛的那一时刻,第二三通换向阀8切换至煤气接通状态,第一三通换向阀14切换至空气接通状态,即第五管路与进空气管路连通,第七管路与进煤气管路连通。第二四通换向阀11和第一四通换向阀12换向至:第一管路与第六管路连通,第五管路与第三管路连通;第二管路与第八管路连通,第四管路与第七管路连通。蓄热式加热炉切换至右侧燃烧、左侧烟气引出的状态,切换完成。一般来说,吹扫时间不超过3秒钟。切换完成后,煤气与空气由第三开口和第四开口进入炉体内燃烧,烟气由第一开口和第二开口排出。As shown in FIG. 3, when the residual gas is completely swept into the furnace, the second three-way reversing valve 8 is switched to the gas-connected state, and the first three-way reversing valve 14 is switched to the air-connected state, that is, The fifth pipeline is communicated with the air inlet pipeline, and the seventh pipeline is communicated with the gas inlet pipeline. The second four-way reversing valve 11 and the first four-way reversing valve 12 are reversed to: the first pipeline communicates with the sixth pipeline, the fifth pipeline communicates with the third pipeline; the second pipeline communicates with the eighth pipeline The pipelines are connected, and the fourth pipeline is connected with the seventh pipeline. The regenerative heating furnace is switched to the state of combustion on the right side and flue gas extraction on the left side, and the switching is completed. In general, the purge time does not exceed 3 seconds. After the switching is completed, the gas and air enter the furnace body through the third opening and the fourth opening for combustion, and the flue gas is discharged from the first opening and the second opening.

本发明对原换向系统进行结构改进,并对换向过程的控制方案进行改进,利用带压脉冲烟气对换向时蓄热体及相关管道中的残留煤气进行脉冲吹扫。The invention improves the structure of the original commutation system and improves the control scheme of the commutation process, and uses the pulsed flue gas with pressure to pulse the residual gas in the regenerator and related pipes during commutation.

1)对换向系统进行结构改进1) Structural improvement of the commutation system

在煤气、空气进入原有换向阀前分别新设置第二三通换向阀及第一三通换向阀,第二三通换向阀实现烟气与煤气通流切换,第一三通换向阀实现烟气与空气的通流切换,同时烟气通道上分别设置一烟气脉冲风机——第一引风机和第二引风机。The second three-way reversing valve and the first three-way reversing valve are newly installed before the gas and air enter the original reversing valve. The reversing valve realizes the flow switching between the flue gas and the air, and at the same time, a flue gas pulse fan, a first induced draft fan and a second induced draft fan, is respectively arranged on the flue gas passage.

2)对换向过程的控制方案进行改进2) Improve the control scheme of the commutation process

控制方案改进后的基本策略是:换向开始后,首先切断炉体左侧煤气、空气的供应,但保持右侧烟气排出状态,然后打开烟气吹扫系统,利用脉冲风机由烟道抽取高温烟气对第一开口和第二开口的蓄热体及相应管路残留煤气进行吹扫,吹扫完毕后,关闭吹扫系统,炉体右侧切换至燃烧状态(煤气、空气接通状态),炉体左侧切换至排烟状态。注:以上“左”和“右”可以为相对的两侧,也可为不相对的两侧。The basic strategy after the improvement of the control scheme is: after the reversing starts, first cut off the supply of gas and air on the left side of the furnace body, but keep the flue gas discharge state on the right side, then open the flue gas purging system, and use the pulse fan to extract from the flue. The high-temperature flue gas purges the regenerator of the first opening and the second opening and the residual gas in the corresponding pipeline. After the purge is completed, the purge system is closed, and the right side of the furnace body is switched to the combustion state (the gas and air are connected to the state). ), the left side of the furnace body switches to the smoke exhaust state. Note: The above "left" and "right" can be opposite sides or not opposite sides.

以上对本发明做了示例性的描述,应该说明的是,在不脱离本发明的核心的情况下,任何简单的变形、修改或者其他本领域技术人员能够不花费创造性劳动的等同替换均落入本发明的保护范围。The present invention has been exemplarily described above. It should be noted that, without departing from the core of the present invention, any simple deformations, modifications or other equivalent replacements that those skilled in the art can do without creative effort fall into the scope of the present invention. the scope of protection of the invention.

Claims (1)

1. The utility model provides a regenerative heating furnace based on heat accumulator is clear away to flue gas which characterized in that includes: furnace body (3), first four-way reversing valve (12), second four-way reversing valve (11), first three-way reversing valve (14) and second three-way reversing valve (8) one side of furnace body (3) is formed with first opening (2) and second opening (1), the opposite side of furnace body (3) is formed with third opening (6) and fourth opening (5), first opening (2) intercommunication has first pipeline (15), second opening (1) intercommunication has second pipeline (19), third opening (6) intercommunication has third pipeline (22), fourth opening (5) intercommunication has fourth pipeline (24), first four-way reversing valve (12) communicate respectively first pipeline (15), third pipeline (22), fifth pipeline (20) and sixth pipeline (21), so that first pipeline (15) with pipeline in fifth pipeline (20) and the sixth pipeline (21) communicate just third pipeline (22) and sixth pipeline (21) communicate The fifth pipeline (20) is communicated with the other pipeline in the sixth pipeline (21); the second four-way reversing valve (11) is communicated with the second pipeline (19), the fourth pipeline (24), the seventh pipeline (23) and the eighth pipeline (25) respectively, so that the second pipeline (19) is communicated with one of the seventh pipeline (23) and the eighth pipeline (25), and the fourth pipeline (24) is communicated with the other of the seventh pipeline (23) and the eighth pipeline (25); the first three-way reversing valve (14) is communicated with an air inlet pipeline (26), a first air blowing pipeline (27) and a fifth pipeline (20) respectively, so that the fifth pipeline (20) can be communicated with any one of the air inlet pipeline (26) and the first air blowing pipeline (27), wherein a first pressurizer (16) is installed on the air inlet pipeline (26), the other port of the first air blowing pipeline (27) is communicated with the sixth pipeline (21), and a first fan (18) is installed on the first air blowing pipeline (27); the second three-way reversing valve (8) is respectively communicated with a coal gas inlet pipeline (28), a second air blowing pipeline (29) and a seventh pipeline (23), so that the seventh pipeline (23) can be communicated with any one of the coal gas inlet pipeline (28) and the second air blowing pipeline (29), wherein a second pressurizer (7) is installed on the coal gas inlet pipeline (28), the other port of the second air blowing pipeline (29) is communicated with the eighth pipeline (25), and a second fan (17) is installed on the second air blowing pipeline (29);
heat accumulators are mounted on the first opening (2), the second opening (1), the third opening (6) and the fourth opening (5), so that gas passing through the first opening (2), the second opening (1), the third opening (6) and the fourth opening (5) can pass through the heat accumulators of the corresponding openings respectively; and a chimney (9) is respectively arranged at the ports of the sixth pipeline (21) and the eighth pipeline (25).
CN201710474893.7A 2017-06-21 2017-06-21 A kind of recuperative heater for removing heat storage based on flue gas Expired - Fee Related CN109099715B (en)

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CN113945097B (en) * 2020-07-16 2024-05-31 河北中科智源新材料技术有限公司 Method for cooperatively removing mixed smoke CO and NOx of double-smoke replacement heat accumulating type heating furnace
CN113945098B (en) * 2020-07-16 2024-05-31 河北中科智源新材料技术有限公司 Synergistic removal method of CO and NOx from mixed smoke of coal smoke replacement regenerative heating furnace
CN113959232A (en) * 2021-11-19 2022-01-21 华北理工大学 Heat accumulating type heating furnace flue gas multi-pollutant cooperative control system and method

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CN104791777A (en) * 2015-04-09 2015-07-22 上海嘉德环境能源科技有限公司 Combustion method for reducing NOx by adopting self-circulation of flue gas
CN206192135U (en) * 2016-08-23 2017-05-24 苏州云白环境设备股份有限公司 Regenerative heating furnace controlling means that commutates
CN206803784U (en) * 2017-06-21 2017-12-26 华北理工大学 The recuperative heater of heat storage is removed based on flue gas

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JP2002286204A (en) * 2001-03-27 2002-10-03 Tokyo Gas Co Ltd Reduction combustion mechanism and reduction combustion method in regenerative burner system
CN104791777A (en) * 2015-04-09 2015-07-22 上海嘉德环境能源科技有限公司 Combustion method for reducing NOx by adopting self-circulation of flue gas
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Inventor after: Wang Zibing

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