CN116081570A - 一种烟气回收传热的天然气转化炉 - Google Patents
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Abstract
本发明涉及天然气转化炉技术领域,具体而言涉及一种烟气回收传热的天然气转化炉。一种烟气回收传热的天然气转化炉,包括燃烧炉本体,蒸汽发生器,所述的蒸汽发生器上设有进水管和蒸汽管道,所述的燃烧炉本体上连接有供氧通道,原料气通道,转化气通道,燃气通道和排气道,所述的排气道上设有第一换热器,第二换热器和第三换热器,所述的燃气通道和所述的第一换热器连接,所述的第三换热器和所述的供氧通道连接,所述的蒸汽管道和原料气管连接。本发明优化换热流程,合理利用余热能位,提高有效能效率。
Description
技术领域
本发明涉及天然气转化炉技术领域,具体而言涉及一种烟气回收传热的天然气转化炉。
背景技术
天然气蒸汽转化炉是天然气蒸汽转化制合成气的主体设备。它是使天然气与蒸汽混合物通过转化管(反应管)转化成富含氢、一氧化碳、二氧化碳的合成气。管内装有含镍催化剂。
目前的转化炉存在有耗能高的问题,因此目前需要一种利用烟气回收传热的天然气转化炉,从而减少燃料消耗。
发明内容
为了解决上述问题,提供一种利用烟气回收传热,有助于减少燃料消耗的天然气转化炉,本发明采用以下技术方案。
一种烟气回收传热的天然气转化炉,包括燃烧炉本体,蒸汽发生器,所述的蒸汽发生器上设有进水管和蒸汽管道,所述的燃烧炉本体上连接有供氧通道,原料气通道,转化气通道,燃气通道和排气道,所述的排气道上设有第一换热器,第二换热器和第三换热器,所述的燃气通道和所述的第一换热器连接,所述的第三换热器和所述的供氧通道连接,所述的蒸汽管道和原料气管连接。
作为优选,所述的燃烧炉本体包括燃烧腔和转化腔,所述的供氧通道,排气道,燃气通道和所述的燃烧腔连接,所述的原料气通道,转化气通道和所述的转化腔连接。
在转化炉运行的过程中,通过燃烧腔堆转化腔进行加热,燃烧产生的高温气体通过排气道排除,废气的初始温度大概为800-900摄氏度,需要将该气体温度降至100摄氏度以下才能正常进行废气处理过滤,本发明采用了三个换热器进行阶梯降温,同时将热量回收利用,在第一次换热器利用转化炉烟道气高温位余热预热原料气,利用烟道气和转化气的高温位余热发生中压蒸汽。所产蒸汽一部分作为工艺用汽,多余部分外输至蒸汽管网。此时烟道气的温度降低到600-500摄氏度, 第二换热器利用转化气高温位余热预热蒸汽发生器给水,以增加中压蒸汽产量,此时烟道气的温度降低到200摄氏度左右。 第三换热器利用烟道气低温位余热预热燃烧空气,以降低转化炉的燃料用量。通过上述结构后气体温度可以降低到60摄氏度左右,可以直接净化后排空。
作为优选,所述的第一换热器,第二换热器和第三换热器依次串联在所述的排气道上。
本发明采用依次排列的方案,可以利用不同阶梯温度满足不同的换热需求,保证生产的安全。
作为优选,所述的第三换热器后设有过滤器。
本发明直接通过过滤器处理废气,保证了本装置的废气不会污染环境。
作为优选,所述的第一换热器,第二换热器和第三换热器和所述的排气道的连接处设有温度传感器。
本发明通过各个温度传感器实时监控排气道内的温度,可以通过控制燃料的投入和供氧速度控制排气道的温度,防止由于温度过高影响换热器的安全。
作为优选,所述的第一换热器包括第一换热管和第二换热管,所述的第一换热管和排气道连接,所述的第二换热管和转化气通道连接。
本发明采用的第一换热器可以同时利用转化气和烟道气对原料气进行预热,这样也可以降低转化气的温度,有助于进一步节约能源,同时也助于降低转化气的温度。
作为优选,所述的第二换热器和进水管连接。
第二换热器利用转化气高温位余热预热蒸汽发生器给水,以增加中压蒸汽产量,此时烟道气的温度降低到200摄氏度左右,减少了蒸汽的产生时间,在降低燃料损耗的同时也提高的生产效率。
本发明的有益效果在于:1. 本发明优化换热流程,合理利用余热能位,提高有效能效率。2.本发明使用第一换热器同时为转化气和烟道气进行降温简化了余热回收流程,降低了装置投资;3. 本发明采用阶梯换热,加深换热深度,提高热效率。
附图说明
图1为本发明的一种结构示意图;
图2为第一换热器的俯视图;
图3为第一换热器的侧视图。
具体实施方式
下面结合具体实施案例对本发明作进一步解释。
实施例1
一种烟气回收传热的天然气转化炉,包括燃烧炉本体1,蒸汽发生器2,所述的蒸汽发生器2上设有进水管3和蒸汽管道4,所述的燃烧炉本体1上连接有供氧通道5,原料气通道6,转化气通道7,燃气通道8和排气道9,所述的排气道9上设有第一换热器10,第二换热器11和第三换热器12,所述的燃气通道8和所述的第一换热器10连接,所述的第三换热器12和所述的供氧通道5连接,所述的蒸汽管道4和原料气管连接。所述的燃烧炉本体1包括燃烧腔17和转化腔18,所述的供氧通道5,排气道9,燃气通道8和所述的燃烧腔连接,所述的原料气通道6,转化气通道7和所述的转化腔连接。所述的第一换热器10,第二换热器11和第三换热器12依次串联在所述的排气道9上。所述的第三换热器12后设有过滤器14。所述的第一换热器10,第二换热器11和第三换热器12和所述的排气道9的连接处设有温度传感器。所述的第一换热器10包括第一换热管13和第二换热管15,所述的第一换热管13和排气道9连接,第一换热器内部空间和燃气通道连接,所述的第二换热管15和转化气通道7连接。所述的第二换热器11和进水管3连接,第二换热器和第三换热器采用相同型号的换热器。
在转化炉运行的过程中,通过燃烧腔堆转化腔进行加热,燃烧产生的高温气体通过排气道9排除,废气的初始温度大概为800-900摄氏度,需要将该气体温度降至100摄氏度以下才能正常进行废气处理过滤,本发明采用了三个换热器进行阶梯降温,同时将热量回收利用,在第一次换热器利用转化炉烟道气高温位余热预热原料气,利用烟道气和转化气的高温位余热发生中压蒸汽。所产蒸汽一部分作为工艺用汽,多余部分外输至蒸汽管网。此时烟道气的温度降低到600-500摄氏度, 第二换热器11利用转化气高温位余热预热蒸汽发生器2给水,以增加中压蒸汽产量,此时烟道气的温度降低到200摄氏度左右。 第三换热器12利用烟道气低温位余热预热燃烧空气,以降低转化炉的燃料用量。通过上述结构后气体温度可以降低到60摄氏度左右,可以直接净化后排空。本发明通过各个温度传感器实时监控排气道9内的温度,可以通过控制燃料的投入和供氧速度控制排气道9的温度,防止由于温度过高影响换热器的安全。
Claims (7)
1.一种烟气回收传热的天然气转化炉,其特征在于:包括燃烧炉本体,蒸汽发生器,所述的蒸汽发生器上设有蒸汽管道,所述的燃烧炉本体上连接有供氧通道,原料气通道,转化气通道,燃气通道和排气道,所述的排气道上设有第一换热器,第二换热器和第三换热器,所述的燃气通道和所述的第一换热器连接,所述的第三换热器和所述的供氧通道连接,所述的蒸汽管道和原料气管连接。
2.根据权利要求1所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的燃烧炉本体包括燃烧腔和转化腔,所述的供氧通道,排气道,燃气通道和所述的燃烧腔连接,所述的原料气通道,转化气通道和所述的转化腔连接。
3.根据权利要求2所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的第一换热器,第二换热器和第三换热器依次串联在所述的排气道上。
4.根据权利要求3所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的第三换热器后设有过滤器。
5.根据权利要求4所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的第一换热器,第二换热器和第三换热器和所述的排气道的连接处设有温度传感器。
6.根据权利要求5所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的第一换热器包括第一换热管和第二换热管,所述的第一换热管和排气道连接,所述的第二换热管和转化气通道连接。
7.根据权利要求6所述的一种烟气回收传热的天然气转化炉,其特征在于:所述的第二换热器和蒸汽管道连接。
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CN117000186A (zh) * | 2023-09-27 | 2023-11-07 | 内蒙古东景生物环保科技有限公司 | 一种节能式天然气蒸汽转化炉 |
CN117000186B (zh) * | 2023-09-27 | 2024-01-05 | 内蒙古东景生物环保科技有限公司 | 一种节能式天然气蒸汽转化炉 |
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