CN105749703A - 一种装车尾气洗涤回收的方法 - Google Patents

一种装车尾气洗涤回收的方法 Download PDF

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CN105749703A
CN105749703A CN201610272584.7A CN201610272584A CN105749703A CN 105749703 A CN105749703 A CN 105749703A CN 201610272584 A CN201610272584 A CN 201610272584A CN 105749703 A CN105749703 A CN 105749703A
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tail gas
butyraldehyde
low
butanol
heavy constituent
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李长胜
胡波
吴宽
陈清
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Zhangjiagang Huachang New Material Technology Co Ltd
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1487—Removing organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1412—Controlling the absorption process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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    • B01D53/1493—Selection of liquid materials for use as absorbents
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    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
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    • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
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Abstract

本发明提供了一种低压尾气吸收的方法，用来处理丁辛醇产品装车低压尾气中的有机物。该方法采用稳定可靠的吸收技术回收丁醛、丁醇、辛醇，每年可以回收大量的丁醛等产品，创造了显著的经济效益，而且大大减少了VOC的排放，减轻了企业的环保负担。

Description

一种装车尾气洗涤回收的方法
技术领域
本发明属于化工领域，具体涉及一种丁辛醇项目中装车尾气洗涤回收的方法。
背景技术
丁醇和辛醇由于可以在同一套装置中用羟基合成的方法生产，故习惯称为丁辛醇。丁醇和辛醇均为无色透明、易燃的油状液体，具有特殊气味，能与水及多种化合物形成共沸物，均有中等毒性。丁辛醇是合成精细化工产品的重要原料，主要用于生产增塑剂、溶剂、脱水剂、消泡剂、分散剂、浮选剂、石油添加剂及合成香料等。
目前世界范围内新建的丁辛醇装置均采用改性铑系催化剂低压羰基合成法，以丙烯、合成气和氢气为原料，在催化剂作用下生成混合丁醛，分离出催化剂循环使用，分离出正/异丁醛经加氢生成正丁醇和异丁醇，经精馏分离得到正丁醇和异丁醇产品；正丁醛在氢氧化钠的催化作用下缩合脱水生成辛烯醛，辛烯醛加氢生产出粗辛醇，经过精馏得到产品辛醇。
丁辛醇装置排放的废气主要指工艺废气，其来源是①羰基合成驰放气，主要成分为氢气、甲烷、丙烯、丙烷等，是为了防止系统内惰性气体和丙烷积累而进行的排放，其中的丙烯、丙烷和丁醛可以回收，回收后的尾气再送火炬燃烧；②辛烯醛、丁醛加氢驰放气，主要成分为氢气和甲烷等，是为了防止系统惰性气体的积累而进行的排放，其中的氢气可以回收，尾气再送火炬燃烧；③火炬气，是各工段产生的调压气、泄压气，主要成分为氢气、甲烷、氮气和烃类，均送火炬燃烧；④产品装车时的低压排放尾气，排放的尾气中含有丁醛、丁醇、辛醇等污染环境的有机物，且由于排放压力低，含有氧气等，使得很难进入火炬系统处理。
针对目前的问题，本发明提出了低压尾气吸收方案。
发明内容
本发明的目的是提供一种低压尾气吸收的方法，用来处理丁辛醇产品装车低压尾气中的有机物。该洗涤回收装置包括喷射器、吸收塔、吸附装置、循环泵及控制系统等。装车站来的低压尾气经过喷射器增压至0.6-0.8MPa后进入吸收塔，用来自残液回收装置的C8、C12重组分溶液进行吸收，吸收了丁醛和丁醇的C8、C12重组分溶液用泵输送至残液回收系统进行分离回收。未能由C8、C12重组分溶液吸收的不凝气等由塔顶排至活性炭吸附装置，吸附其中少量(10-20ppm)的丁醛、丁醇、辛醇等，剩余气体达标后排放至大气。
该方法采用稳定可靠的吸收技术回收丁醛、丁醇、辛醇，每年可以回收大量的丁醛等产品，创造了显著的经济效益，而且大大减少了VOC的排放，减轻了企业的环保负担。
附图说明
图1洗涤回收方法示意图
具体实施方式
实施例1
采用本发明提供的洗涤回收装置(包括喷射器、吸收塔、吸附装置、循环泵及控制系统等)。装车站来的低压尾气经过喷射器增压至0.6MPa后进入吸收塔，用来自残液回收装置的C8、C12重组分溶液进行吸收，吸收了丁醛和丁醇的C8、C12重组分溶液用泵输送至残液回收系统进行分离回收。未能由C8、C12重组分溶液吸收的不凝气等由塔顶排至活性炭吸附装置，吸附其中剩余的10ppm的丁醛、丁醇、辛醇等，剩余气体达标后排放至大气。
实施例2
采用本发明提供的洗涤回收装置(包括喷射器、吸收塔、吸附装置、循环泵及控制系统等)。装车站来的低压尾气经过喷射器增压至0.8MPa后进入吸收塔，用来自残液回收装置的C8、C12重组分溶液进行吸收，吸收了丁醛和丁醇的C8、C12重组分溶液用泵输送至残液回收系统进行分离回收。未能由C8、C12重组分溶液吸收的不凝气等由塔顶排至活性炭吸附装置，吸附其中剩余的20ppm的丁醛、丁醇、辛醇等，剩余气体达标后排放至大气。
实施例3
采用本发明提供的洗涤回收装置后，丁辛醇项目VOC排放降低30％，大大降低了企业的环保负担。
实施例4
国内某丁辛醇项目采用本发明提供的洗涤回收装置后，每年可多回收丁醛、丁醇、辛醇等共计5万吨，产生了明显的经济效益。

Claims (8)

1.一种低压尾气洗涤回收的方法，其特征为，该方法用来处理丁辛醇产品装车低压尾气中的有机物。
2.如权利要求1所述的方法，其特征为，该洗涤回收装置包括喷射器、吸收塔、吸附装置、循环泵及控制系统，如图1所示。
3.如权利要求1所述的方法，其特征为装车站来的低压尾气经过喷射器增压后进入吸收塔。
4.如权利要求3所述的方法，其特征为低压尾气经过喷射器增压至0.6-0.8Mpa。
5.如权利要求1所述的方法，其特征为尾气进入吸收塔后，用来自残液回收装置的C8、C12重组分溶液进行吸收，吸收了丁醛和丁醇的C8、C12重组分溶液用泵输送至残液回收系统进行分离回收。
6.如权利要求1所述的方法，其特征为未能由C8、C12重组分溶液吸收的不凝气等由塔顶排至活性炭吸附装置进行吸附。
7.如权利要求6所述的方法，其特征为未能由C8、C12重组分溶液吸收的不凝气中含有10-20ppm的丁醛、丁醇、辛醇。
8.如权利要求1所述的方法，其特征为经过活性炭吸附装置，吸附其中少量的丁醛、丁醇、辛醇后，剩余气体达标后排放至大气。
CN201610272584.7A 2016-04-28 2016-04-28 一种装车尾气洗涤回收的方法 Pending CN105749703A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110848717A (zh) * 2019-12-20 2020-02-28 大连福佳·大化石油化工有限公司 油罐车装车voc回收处理系统及其处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101721890A (zh) * 2009-12-20 2010-06-09 芜湖新兴铸管有限责任公司 焦油、粗苯尾气收集系统
CN203212510U (zh) * 2013-03-05 2013-09-25 中国五环工程有限公司 三聚氰胺生产装置的尾气回收系统
CN203264539U (zh) * 2013-06-14 2013-11-06 历洪波 丁辛醇尾气回收装置
CN104610032A (zh) * 2014-12-26 2015-05-13 浙江大学 一种丁辛醇尾气回收装置及其方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101721890A (zh) * 2009-12-20 2010-06-09 芜湖新兴铸管有限责任公司 焦油、粗苯尾气收集系统
CN203212510U (zh) * 2013-03-05 2013-09-25 中国五环工程有限公司 三聚氰胺生产装置的尾气回收系统
CN203264539U (zh) * 2013-06-14 2013-11-06 历洪波 丁辛醇尾气回收装置
CN104610032A (zh) * 2014-12-26 2015-05-13 浙江大学 一种丁辛醇尾气回收装置及其方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110848717A (zh) * 2019-12-20 2020-02-28 大连福佳·大化石油化工有限公司 油罐车装车voc回收处理系统及其处理方法

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