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天然气脱硫设备工艺中的干法脱硫?

时间:2020-08-05
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干法脱硫是将原料气以一定的空速通过装有固体脱硫剂的固体床,经过气-固接触交换,将气相中的H2S吸附到脱硫剂上,以使天然气脱硫设备达到净化的目的。下面跟生物脱硫的小编一起了解下吧!
Dry desulfurization is that the feed gas passes through the solid bed with solid Desulfurizer at a certain space speed, and then adsorbs the H2S in the gas phase to the desulfurizer through gas-solid contact exchange, so as to achieve the purification purpose of natural gas desulfurization equipment.
1、铁法
1. Iron method
铁法是一个比较古老的脱硫方法,在脱硫过程中H2S与氢氧化铁反应,当脱硫剂呈碱性时,脱硫反应按上面初个反应式进行,当脱硫剂呈中性或酸性时,脱硫反应则按第2个反应式进行。脱硫剂再生反应速度比脱硫速度慢,是整个过程的控制步骤。
Iron process is an old desulfurization method. In the desulfurization process, H2S reacts with iron hydroxide. When the desulfurizer is alkaline, the desulfurization reaction is carried out according to the first reaction formula above. When the desulfurizer is neutral or acidic, the desulfurization reaction is carried out according to the second reaction formula. The regeneration reaction speed of desulfurizer is slower than that of desulfurization, which is the control step of the whole process.
2、氧化铁法
2. Iron oxide process
此法脱H2S所用氧化铁即人们熟知的海绵铁,是一种古老而有名的气体脱硫方法,迄今仍在许多特定用途的领域中广泛应用。用于天然气脱硫设备气体脱硫的氧化铁只有α-Fe203·H2O和γ-Fe203·H20,它们都易于与H2S反应。重要的是生成的硫化铁容易再氧化成活化形式的氧化铁。
Iron oxide, known as sponge iron, is an old and famous gas desulfurization method, which is still widely used in many specific fields. Only α - Fe203 · H2O and γ - Fe203 · H20 are used for gas desulfurization of natural gas desulfurization equipment, which are easy to react with H2S. It is important that the resulting iron sulfide is easily re oxidized to the activated form of iron oxide.
           生物脱硫
3、NCA固体吸收法
3. NCA solid absorption method
该法是Dow化学公司提出的用于脱除H2S的方法。NCA固体含80%NaOH和20%Ca(OH)2(均指质量百分比)。该法在脱除H2S的同时,亦可除去气体中可能存在的高含量低分子量硫醇。NCA固体法是非再生性的,因而与所脱除的H2S相比,其化学品耗量相当高。反应后的固体周期性地用水从塔底冲洗出来。
This method is proposed by Dow Chemical Company to remove H2S. NCA solid contains 80% NaOH and 20% Ca (OH) 2 (both refer to mass percentage). This method can also remove high content and low molecular weight mercaptans in the gas while removing H2S. The NCA solid process is non regenerative, so its chemical consumption is quite high compared with the H2S removed. The solid after reaction is washed out periodically with water from the bottom of the tower.
4、氧化锌法
4. Zinc oxide process
氧化锌法是用于气体细化脱硫的方法之一,由于在天然气脱硫设备中使用氧化锌脱硫剂后一般不再利用即废弃,因此此法只适于脱除少量硫,脱硫剂的用量应保障量使用一年以上。当原料气中含硫量高时,应与湿法脱硫或其它干法脱硫配合使用。
Zinc oxide method is one of the methods used for refined desulfurization of gas. Since zinc oxide desulfurizer is generally no longer used or abandoned after being used in natural gas desulfurization equipment, this method is only suitable for removing a small amount of sulfur, and the amount of desulfurizer should be guaranteed to be used for more than one year. When the sulfur content of feed gas is high, it should be used together with wet desulfurization or other dry desulfurization.
以上是关于天然气脱硫设备工艺中的干法脱硫的相关内容介绍,相信大家都了解了,如想要了解更多内容欢迎点击生物脱硫http://www.hneee.net官网。
The above is about the natural gas desulfurization equipment process dry desulfurization related content introduction, I believe you all understand, if you want to know more content, welcome to click biological desulfurization http://www.hneee.net Official website.