CN105771597A - 一种大炉尾气进行氨法脱硫的工艺 - Google Patents

一种大炉尾气进行氨法脱硫的工艺 Download PDF

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CN105771597A
CN105771597A CN201610202087.XA CN201610202087A CN105771597A CN 105771597 A CN105771597 A CN 105771597A CN 201610202087 A CN201610202087 A CN 201610202087A CN 105771597 A CN105771597 A CN 105771597A
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ammonia
hso
desulfurization process
tail gas
tower
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仝毅石
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SHIJIAZHUANG ZHENGDING JINSHI CHEMICAL CO Ltd
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SHIJIAZHUANG ZHENGDING JINSHI CHEMICAL CO Ltd
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    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/507—Sulfur oxides by treating the gases with other liquids
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium
    • C01C1/245—Preparation from compounds containing nitrogen and sulfur
    • C01C1/246—Preparation from compounds containing nitrogen and sulfur from sulfur-containing ammonium compounds
    • C01C1/247—Preparation from compounds containing nitrogen and sulfur from sulfur-containing ammonium compounds by oxidation with free oxygen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

本发明提供了一种大炉尾气进行氨法脱硫的工艺，包括以下步骤：SO2吸收、吸收液的氧化，吸收液的浓缩结晶以及除余尘。本发明的有益效果为：氨回收法技术将回收的二氧化硫、氨全部转化为化肥，还能够出产硫酸铵变废为宝、化害为利，同时大幅度降低燃料成本和脱硫费用，一举两得；运行低电耗，脱硫剂及脱硫产物都是易溶性物质，装置内脱硫液为澄清溶液，无积垢无磨损，更容易实现DCS等自动控制，操作控制简单易行，节省人工成本，降低劳动强度。

Description

一种大炉尾气进行氨法脱硫的工艺
技术领域
本发明涉及大炉烟气处理技术领域，尤其涉及一种大炉尾气进行氨法脱硫的工艺。
背景技术
将天青石和原料煤在高温条件下在粗锶回转窑中进行还原焙烧，矿石中的SrSO4被还原成可溶性的粗制SrS，简称粗锶。回转窑产生的烟气在以往只进行简单的脱硫脱硝脱尘然后排入大气，大大了污染了大气环境，同时还浪费了烟气中有用成分，不能变废为宝。
发明内容
本发明提供了一种大炉尾气进行氨法脱硫的工艺，氨回收法技术将回收的二氧化硫、氨全部转化为化肥，还能够出产硫酸铵变废为宝、化害为利，同时大幅度降低燃料成本和脱硫费用，一举两得；运行低电耗，脱硫剂及脱硫产物都是易溶性物质，装置内脱硫液为澄清溶液，无积垢无磨损，更容易实现DCS等自动控制，操作控制简单易行，节省人工成本，降低劳动强度。
为解决上述技术问题，本发明提供了一种大炉尾气进行氨法脱硫的工艺，包括以下步骤：
步骤一、SO2吸收
大炉烟气在吸收塔中与氨吸收剂接触，发生如下反应：
NH3+H2O+SO2=NH4HSO3
2NH3+H2O+SO2=(NH4)2SO3
2(NH4)2SO3+H2O+SO2=2NH4HSO3
在吸收的过程中持续向吸收塔内补充氨气；
步骤二、氧化
将吸收塔内的吸收液转移至氧化塔，并向氧化塔内充氧，发生如下反应：
2(NH4)2SO3+O2=2(NH4)2SO4
2NH4HSO3+O2=2NH4HSO4
NH4HSO4+NH3=(NH4)2SO4
在氧化的过程中持续向氧化塔内补充氧气；
步骤三、浓缩结晶
将氧化后的吸收液加热蒸发，形成过饱和溶液，硫酸铵从溶液中结晶析出，过滤干燥后形成硫酸铵，吸收液加热采用烟气余热作为热源；
步骤四、除余尘
采用电除雾器吸收烟气中剩余的粉尘。
本申请实施例中提供的一个或多个技术方案，至少具有如下技术效果或优点：
1、氨回收法技术将回收的二氧化硫、氨全部转化为化肥，还能够出产硫酸铵变废为宝、化害为利，同时大幅度降低燃料成本和脱硫费用，一举两得。
2、运行低电耗，并且用衬玻璃鳞片防腐技术，用运用特殊材料泵体，装置可靠性达98.5%。
3、脱硫剂及脱硫产物都是易溶性物质，装置内脱硫液为澄清溶液，无积垢无磨损，更容易实现DCS等自动控制，操作控制简单易行。节省人工成本，降低劳动强度，而且氨对NOX同样有吸收作用。另外脱硫过程中形成的亚硫铵对NOX还具有还原作用，所以氨法脱硫的同时也可实现脱硝的目的。
具体实施方式
为了更好的理解上述技术方案，下面将以具体的实施方式对上述技术方案进行详细的说明。
本实施例所述的一种大炉尾气进行氨法脱硫的工艺，包括以下步骤：
步骤一、SO2吸收
大炉烟气在吸收塔中与氨吸收剂接触，发生如下反应：
NH3+H2O+SO2=NH4HSO3
2NH3+H2O+SO2=(NH4)2SO3
2(NH4)2SO3+H2O+SO2=2NH4HSO3
在吸收的过程中持续向吸收塔内补充氨气；
步骤二、氧化
将吸收塔内的吸收液转移至氧化塔，并向氧化塔内充氧，发生如下反应：
2(NH4)2SO3+O2=2(NH4)2SO4
2NH4HSO3+O2=2NH4HSO4
NH4HSO4+NH3=(NH4)2SO4
在氧化的过程中持续向氧化塔内补充氧气；
步骤三、浓缩结晶
将氧化后的吸收液加热蒸发，形成过饱和溶液，硫酸铵从溶液中结晶析出，过滤干燥后形成硫酸铵，吸收液加热采用烟气余热作为热源；
步骤四、除余尘
采用电除雾器吸收烟气中剩余的粉尘。
本实施例至少具有以下优点：氨回收法技术将回收的二氧化硫、氨全部转化为化肥，还能够出产硫酸铵变废为宝、化害为利，同时大幅度降低燃料成本和脱硫费用，一举两得。运行低电耗，并且用衬玻璃鳞片防腐技术，用运用特殊材料泵体，装置可靠性达98.5%。脱硫剂及脱硫产物都是易溶性物质，装置内脱硫液为澄清溶液，无积垢无磨损，更容易实现DCS等自动控制，操作控制简单易行。节省人工成本，降低劳动强度。而且氨对NOX同样有吸收作用。另外脱硫过程中形成的亚硫铵对NOX还具有还原作用，所以氨法脱硫的同时也可实现脱硝的目的。
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，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作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。

Claims (1)

1.一种大炉尾气进行氨法脱硫的工艺，其特征在于，包括以下步骤：
步骤一、SO2吸收
大炉烟气在吸收塔中与氨吸收剂接触，发生如下反应：
NH3+H2O+SO2=NH4HSO3
2NH3+H2O+SO2=(NH4)2SO3
2(NH4)2SO3+H2O+SO2=2NH4HSO3
在吸收的过程中持续向吸收塔内补充氨气；
步骤二、氧化
将吸收塔内的吸收液转移至氧化塔，并向氧化塔内充氧，发生如下反应：
2(NH4)2SO3+O2=2(NH4)2SO4
2NH4HSO3+O2=2NH4HSO4
NH4HSO4+NH3=(NH4)2SO4
在氧化的过程中持续向氧化塔内补充氧气；
步骤三、浓缩结晶
将氧化后的吸收液加热蒸发，形成过饱和溶液，硫酸铵从溶液中结晶析出，过滤干燥后形成硫酸铵，吸收液加热采用烟气余热作为热源；
步骤四、除余尘
采用电除雾器吸收烟气中剩余的粉尘。
CN201610202087.XA 2016-04-05 2016-04-05 一种大炉尾气进行氨法脱硫的工艺 Pending CN105771597A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1408464A (zh) * 2002-09-09 2003-04-09 华东理工大学 烟气中so2的脱出和回收方法及装置
US20110044875A1 (en) * 2009-01-09 2011-02-24 Tessenderlo Kerley, Inc. Ats tail gas treating process for sru and sws off gases
CN202620999U (zh) * 2011-12-31 2012-12-26 艾淑艳 脱硫脱硝一体化烟气净化系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1408464A (zh) * 2002-09-09 2003-04-09 华东理工大学 烟气中so2的脱出和回收方法及装置
US20110044875A1 (en) * 2009-01-09 2011-02-24 Tessenderlo Kerley, Inc. Ats tail gas treating process for sru and sws off gases
CN202620999U (zh) * 2011-12-31 2012-12-26 艾淑艳 脱硫脱硝一体化烟气净化系统

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Application publication date: 20160720