CN202590611U - 一种循环吸收液氨法脱硫塔 - Google Patents

一种循环吸收液氨法脱硫塔 Download PDF

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Publication number
CN202590611U
CN202590611U CN 201220190686 CN201220190686U CN202590611U CN 202590611 U CN202590611 U CN 202590611U CN 201220190686 CN201220190686 CN 201220190686 CN 201220190686 U CN201220190686 U CN 201220190686U CN 202590611 U CN202590611 U CN 202590611U
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absorption liquid
tower
desulphurization tower
circulating absorption
circulating
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郭翠翠
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Henan Muhua Chemical Co Ltd
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SHANDONG TIANTAI STEEL PLASTIC Co Ltd
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Abstract

本实用新型公开了一种循环吸收液氨法脱硫塔,脱硫塔下部设有进气口(2),排气口(3)设置在脱硫塔的顶部,在塔内自上而下依次设置有吸收液进口(4)、喷头(5)、底槽(8)和若干层净化室(7),净化室(7)的底板(6)上设有若干使烟气和吸收液通过的孔,底槽(8)上设有阀门(9)。本实用新型的结构简单,能解决烟气与吸收液接触时间短,接触不充分的问题,并能使氨法处理二氧化硫产生的副产物可回收利用。

Description

一种循环吸收液氨法脱硫塔
技术领域
本实用新型涉及一种循环吸收液氨法脱装置,具体涉及一种循环吸收液氨法脱硫塔。  
背景技术
氨法脱硫是利用氨水溶液吸收烟气中的SO2产生亚硫酸氢铵和亚硫酸氨,而亚硫酸铵对SO2也有很强的吸收能力,二者都是氨法中的主要吸收剂,亚硫酸氢铵通过加氨也可产生亚硫酸铵。目前,湿式氨法脱硫工艺所采用的喷淋塔数效率比较低的主要原因有两个。一是由于烟气量很大,所需脱硫塔的直径非常大,而脱硫塔的高度一般较低,容易存在沟流现象,使烟气流场不均匀,导致气—液—固三相接触面积减少。二是喷淋层所喷出的液滴较大,传质比表面积较小,传质系数也小,导致气—液传质效率降低,虽然加大脱硫剂浆液的循环可以增加液气比,但操作费用又将大幅增加。特别是,当需要对浓度比较高,气流量比较大的SO2气体(例如有富硫矿物燃烧产生的气体)进行吸收时,烟气与吸收液接触的时间段,吸收不充分。 
实用新型内容
针对以上不足本实用新型提供了一种循环吸收液氨法脱硫塔,主要解决烟气与吸收液接触时间短,接触不充分的问题。 
一种循环吸收液氨法脱硫塔,其特征在于:所述脱硫塔下部设有进气口;排气口设置在脱硫塔的顶部;在塔内自上而下依次设置有吸收液进口、喷头、净化室和底槽,净化室的底板上设有若干使烟气和吸收液通过的孔,底槽上设有阀门。所述净化室有3到6个。 
与传统的湿式氨法烟气脱硫工艺相比,本发明具有如下优点:在净化室内形成连续而激烈的烟气湍流,极大地优化脱硫塔内的烟气流场,强化脱硫塔内烟气与脱硫剂浆液之间的气液传质,进而提高脱硫效率。 一方面迫使烟气发生紊流,另一方面消除烟气死角,使烟气在脱硫塔内既分层次实现流场均匀优化,又不断强化烟气与脱硫剂浆液之间的传质,有效防止了脱硫塔边缘脱硫剂浆液喷淋盲区对脱硫效率的影响,从而使气液传质效率可提高25~35%。 占地面积小、极大地减少了设备的投资和运行费用。 
附图说明
图1为本实用新型一种循环吸收液氨法脱硫塔的结构示意图。 
其中:1-脱硫塔;2-进气口;3-出气口;4-吸收液进口;5-喷头;6-底板;7-净化室;8-底槽;9-阀门。  
具体实施方式
下面结合附图和具体实施方式对本实用新型作进一步详细地说明。 
参照图1,一种循环吸收液氨法脱硫塔,在脱硫塔的下部设有进气口2;在塔底的底槽8上设有阀门9,出气口3设置在塔的顶部;在塔内自下而上依次设有吸收液进口4、喷头5、净化室7、净化室7的底板6上设有若干使烟气和吸收液通过的孔。净化室共有四层。 
本实用新型采用烟气与吸收液逆向接触的方法,使反应充分彻底。烟气从进气口1进入塔内,中途要经净化室7与吸收液进行反应,烟最后通过排气口8排向大气,反应产物落入底槽。吸收液也可进一步由循环泵再次注入吸收液进口,不断循环。当吸收液的浓度达到一定程度时,经阀门排出,可以进行回收。 
虽然本实用新型已以较佳实施例公开如上,但它们并不是用来限定本实用新型,任何熟悉此技艺者,在不脱离本实用新型之精神和范围内,自当可作各种变化,因此本实用新型的保护范围应当以本申请的权利要求保护范围所界定的为准。 

Claims (2)

1.一种循环吸收液氨法脱硫塔,其特征在于:所述脱硫塔下部设有进气口(2);排气口(3)设置在脱硫塔的顶部;在塔内自上而下依次设置有吸收液进口(4)、喷头(5)、净化室(7)和底槽(8),净化室(7)的底板(6)上设有若干使烟气和吸收液通过的孔,底槽(8)上设有阀门(9)。
2.如权利要求1所述的一种循环吸收液氨法脱硫塔,其特征在于:所述净化室有3到6个。
CN 201220190686 2012-05-02 2012-05-02 一种循环吸收液氨法脱硫塔 Expired - Lifetime CN202590611U (zh)

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