CN206188730U - 一种焦炉荒煤气上升管换热器 - Google Patents

一种焦炉荒煤气上升管换热器 Download PDF

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CN206188730U
CN206188730U CN201621243607.3U CN201621243607U CN206188730U CN 206188730 U CN206188730 U CN 206188730U CN 201621243607 U CN201621243607 U CN 201621243607U CN 206188730 U CN206188730 U CN 206188730U
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heat exchanger
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raw coke
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coke oven
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陈力群
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Shaanxi Yuteng Energy And Environmental Protection Technology Co ltd
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SHAANXI YUTENG INDUSTRY Co Ltd
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Abstract

本实用新型公开了一种焦炉荒煤气上升管换热器，包括从内到外依次设置的合金导热体、换热盘管、保温内层隔离板、填充层和外侧保温板。该换热器能够充分高效的回收荒煤气的余热，也能保障换热器在高温且恶劣的环境下的安全运行。

Description

一种焦炉荒煤气上升管换热器
技术领域
本实用新型属于焦化技术领域，涉及一种焦炉荒煤气上升管换热器。
背景技术
目前世界焦化业进行荒煤气降温的传统方法是喷洒大量70℃～75℃的循环氨水，循环氨水吸热而大量蒸发，使荒煤气温度得以降低，进入后序煤化工产品回收加工工段。这样的结果是，荒煤气带出的热量被白白浪费掉，既浪费了荒煤气热能，还增加了水资源的消耗和电力的消耗，上升管荒煤气余热回收技术尚未取得实质性突破。
1970年开始，国内外都对上升管荒煤气的余热利用进行了多项次的研究和试验，夹套上升管、导热油、热管技术的应用，最终不能完全解决上升管的简体焊缝拉裂、漏水、漏汽等问题，以及上升管内部焦油和石墨的吸附问题，未及深入开发研究和使用，而搁置下来近30多年。炼焦荒煤气余热回收利用技术在我国经历了近30年的研究历程，其材料、结构不能满足现场工况要求，效率低、寿命短，关键技术没有突破，至今尚无成熟、可靠、稳定的大工业化应用实例。
上升管内衬材料是提高荒煤气余热回收利用效率的关键技术之一。原工艺装备上升管采用普通碳钢材料，内壁衬耐火砖，更换用余热回收装置后，内壁不能再衬耐火砖，否则热传导效率极低。这样，导致装置内壁直接与高温(650℃～900℃)荒煤气接触，而荒煤气中含有氧气、一氧化碳、二氧化碳、硫化氢、氧化氮、氢气、甲烷、水汽及芳香烃类化合物等，普通碳钢在此温度及环境下，高温烧蚀严重，不能满足工况要求。
实用新型内容
本实用新型的目的在于提供一种焦炉荒煤气上升管换热器。该换热器能够充分高效的回收荒煤气的余热，也能保障换热器在高温且恶劣的环境下的安全运行。
本实用新型的目的是通过以下技术方案来解决的：
这种焦炉荒煤气上升管换热器，其特征在于，包括从内到外依次设置的合金导热体、换热盘管、保温内层隔离板、填充层和外侧保温板。
更进一步的，本实用新型的特点还在于：
其中换热盘管呈螺旋状盘绕在合金导热体的外侧。
其中填充层为设置在外侧保温板和保温内层隔离板之间的破碎的珍珠岩棉。
其中外侧保温板的表面上开有排气孔。
其中排气孔非对称分布在外侧保温板的表面上。
其中保温内层隔离板与换热盘管之间具有间隙。
其中合金导热体为Cr25Ni20和0.1～05％稀土元素熔融浇铸制成的。
本实用新型的有益效果是：导热盘管提高了换热效率，同时到热盘管外侧设置的保温内层隔离板、填充层和外侧保温板，能够杜绝热量的扩散，降低了热量损失，提高了导热盘管换热后产生的水蒸气和热水；同时最内层采用合金导热体，能够提高换热器的使用寿命和使用效率，保障换热器能够在高温且恶劣的环境下长时间使用；本装置结构紧促合理，换热效率高，耐高温，耐腐蚀，适合用于荒煤气预热的回收利用。
更进一步的，换热盘管在换热过程中，热膨胀方向朝上，同时换热盘管的螺旋朝上设置，有利于热量的传递和换热盘管内部结构的稳定。
更进一步的，填充层使用的破碎的珍珠岩棉，其组织严密，保温隔热效果好；排气孔用于间隙停炉和上升管内湿气的排放。
更进一步的，保温层隔离板和换热盘管之间的间隙，有利于腔室的空气流动，便于换热盘管进行热交换；掺有稀土元素的镍铬合金制成的合金导热体的耐高温(800-100℃)、耐腐蚀效果更好。
附图说明
图1为本实用新型的结构示意图。
其中，1为外侧保温板；2为填充层；3为保温内层隔离板；4为换热盘管；5为合金导热体。
具体实施方式
下面结合附图对本实用新型做进一步详细描述：
本实用新型提供了一种焦炉荒煤气上升管换热器，如图1所示，包括从外之内依次设置的合金导热体5，合金导热体5为掺有稀土金属的镍铬合金，具体为Cr25Ni20和0.1～05％稀土元素熔融浇铸制成的合金热导体5；合金热导体5的外侧设置有换热盘管4，换热盘管4为螺旋朝上设置的；换热盘管4的外侧设置有保温内层隔离板3，保温内层隔离板3与换热盘管4之间设置有间隙；保温内层隔离板3外侧设置为外侧保温板1；外侧保温板1和保温内层隔离板3之间设置有填充层2，填充层2为破碎后的珍珠岩棉。
本实用新型的换热管，其结构紧促合理，换热效率高，且耐高温、耐腐蚀，适合用于荒煤气余热的回收和利用。

Claims (7)

1.一种焦炉荒煤气上升管换热器，其特征在于，包括从内到外依次设置的合金导热体(5)、换热盘管(4)、保温内层隔离板(3)、填充层(2)和外侧保温板(1)。
2.根据权利要求1所述的焦炉荒煤气上升管换热器，其特征在于，所述换热盘管(4)呈螺旋状盘绕在合金导热体(5)的外侧。
3.根据权利要求1所述的焦炉荒煤气上升管换热器，其特征在于，所述填充层(2)为设置在外侧保温板(1)和保温内层隔离板(3)之间的破碎的珍珠岩棉。
4.根据权利要求1所述的焦炉荒煤气上升管换热器，其特征在于，所述外侧保温板(1)的表面上开有排气孔。
5.根据权利要求4所述的焦炉荒煤气上升管换热器，其特征在于，所述排气孔非对称分布在外侧保温板(1)的表面上。
6.根据权利要求1所述的焦炉荒煤气上升管换热器，其特征在于，所述保温内层隔离板(3)与换热盘管(4)之间具有间隙。
7.根据权利要求1所述的焦炉荒煤气上升管换热器，其特征在于，所述合金导热体(5)为Cr25Ni20和0.1～05％稀土元素熔融浇铸制成的。
CN201621243607.3U 2016-11-16 2016-11-16 一种焦炉荒煤气上升管换热器 Active CN206188730U (zh)

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