众所周知，脱硫剂的脱硫方法可分为湿法、干法和半干法三种，其中湿法脱硫效率高，适应范围广，析出产物石膏可做商品出售等优点被广泛应用。而湿法脱硫工艺按照吸收剂不同可以划分出几种不同的方法，接下来高原蓝环保就带大家走进本篇文章进行详细了解。
As we all know, the desulfurization methods of desulfurizer can be divided into wet method, dry method and semi dry method. Among them, the wet method is widely used for its high desulfurization efficiency, wide application range, and the precipitated gypsum can be sold as a commodity. The wet desulfurization process can be divided into several different methods according to different absorbents. Next, plateau blue environmental protection will take you to this article for a detailed understanding.
脱硫剂种类有很多，比如：MQ脱硫催化剂、MSQ脱硫催化剂、PYS复合栲胶脱硫催化剂、酞菁钴脱硫催化剂等，不同的脱硫剂使用的脱硫方法也不同。
There are many kinds of desulfurizing agents, such as MQ desulfurizing catalyst, MSQ desulfurizing catalyst, pYS composite tannin extract desulfurizing catalyst, cobalt phthalocyanine desulfurizing catalyst, etc. Different desulfurizing agents use different desulfurizing methods.
1、石灰石石膏脱硫
1. Limestone gypsum desulfurization
利用石灰石粉加水制作成浆液作为吸收剂，在反应塔内喷淋吸收烟气中的二氧化硫等酸性污染气体，生成亚硫酸钙后，通过强制氧化生成含两个结晶水的硫酸钙，脱硫反应产生的晶体石膏，被送到旋流站进行初步脱水，然后经真空皮带机二次脱水，成为石膏产品。该工艺是应用较为广泛和可靠的工艺。
Limestone powder is used to add water to make slurry as absorbent, which is sprayed in the reaction tower to absorb acid pollution gas such as sulfur dioxide in the flue gas. After generating calcium sulfite, calcium sulfate containing two crystal water is generated by forced oxidation. The crystal gypsum produced by desulfurization reaction is sent to the cyclone station for preliminary dehydration, and then dehydrated by the vacuum belt conveyor for secondary dehydration to become gypsum product. This process is widely used and reliable.
2、双碱法脱硫
2. Double alkali desulfurization
双碱法烟气脱硫工艺是为了克服石灰石石膏法容易结垢的缺点而发展起来的。它先用碱或碱金属盐类如氢氧化钠、碳酸氢钠等的水溶液吸收二氧化硫，然后在另一石灰反应器中用石灰将吸收二氧化硫后的溶液再生，再生后的吸收液再循环使用，产物以亚硫酸钙和石膏形式析出。双碱法脱硫相对技术比较成熟，小型锅炉、窑炉脱硫除尘大多采用双碱法，但长期运营成本较高。
The double alkali flue gas desulfurization process is developed to overcome the shortcomings of limestone gypsum method which is easy to scale. It first absorbs sulfur dioxide with aqueous solutions of alkali or alkali metal salts such as sodium hydroxide and sodium bicarbonate, and then regenerates the solution after absorbing sulfur dioxide with lime in another lime reactor. The regenerated absorption solution is recycled, and the product is precipitated in the form of calcium sulfite and gypsum. The relative technology of double alkali desulfurization is relatively mature. The double alkali method is mostly used for desulfurization and dust removal of small boilers and kilns, but the long-term operation cost is high.
3、氨法脱硫
3. Ammonia desulfurization
氨或硫酸铵在吸收塔内吸收烟气中的二氧化硫、三氧化硫，生成亚硫酸铵或硫酸铵，其中亚硫酸铵经氧化生成硫酸铵，经过脱水、干燥后就得到固体硫酸铵。该工艺的主要技术特点是脱硫效率高、副产物为直径0。2～0。6mm的硫酸镣晶体，在某些地区可做肥料，整个系统不产生废水或废渣，能耗低。不足之处是一次性投资费用和运行费用较高，受当地氨的来源限制，此外副产物硫酸铵的利用途径要充分考虑。工艺实施过程中，氨的泄漏也会造成环境问题。
Ammonia or ammonium sulfate absorbs sulfur dioxide and sulfur trioxide in the flue gas in the absorption tower to form ammonium sulfite or ammonium sulfate, wherein ammonium sulfite is oxidized to form ammonium sulfate, and solid ammonium sulfate is obtained after dehydration and drying. The main technical features of this process are high desulfurization efficiency and by-products with diameter of 0. 2～0。 6mm sulfuric acid shackle crystal can be used as fertilizer in some areas. The whole system does not produce waste water or slag, and the energy consumption is low. The disadvantages are high one-time investment and operation costs, limited by the local ammonia source, and the utilization of by-product ammonium sulfate should be fully considered. During the process implementation, ammonia leakage will also cause environmental problems.
4、氧化镁法脱硫
4. Magnesium oxide desulfurization
氧化镁法脱硫工艺按产物可以分为两种。
Magnesium oxide desulfurization process can be divided into two types according to products.
（1）回收法: 氧化镁经过熟化反应生成氢氧化镁，制成一定浓度的氢氧化镁浆液，在吸收塔内氢氧化镁和二氧化硫反应生成亚硫酸镁，亚硫酸镁经强制氧化生成硫酸镁，分离干燥后就是固体硫酸镁。
(1) Recovery method: magnesium oxide generates magnesium hydroxide through maturing reaction to prepare magnesium hydroxide slurry with a certain concentration. Magnesium hydroxide reacts with sulfur dioxide in the absorption tower to generate magnesium sulfite. Magnesium sulfite is forcibly oxidized to generate magnesium sulfate. After separation and drying, it is solid magnesium sulfate.
（2）氧化镁再生法: 氢氧化镁在吸收塔内和二化硫反应生成亚硫酸镁后，抑制亚硫酸镁生成硫镁，将其分离、干燥、焙烧后，产生氧化镁和二氧化硫富气，氧化镁循环再用，而二氧化硫富气用于制造硫酸。
(2) Magnesium oxide regeneration method: after magnesium hydroxide reacts with sulfur dioxide in the absorption tower to generate magnesium sulfite, it inhibits magnesium sulfite from generating magnesium sulfate. After separation, drying and roasting, magnesium oxide and sulfur dioxide rich gas are generated. Magnesium oxide is recycled, and sulfur dioxide rich gas is used to produce sulfuric acid.
5、海水脱硫法
5. Seawater desulfurization method
海水通常呈弱碱性，因而海水具有天然地吸收二氧化硫的能力。国外一些脱硫公司利用海水的这种特性，成功地开发出海水脱硫工艺。该工艺不产生任何废弃物，具有技术成熟、工艺简单、系统运行可靠、脱硫效率高等特点，在一些沿海和地区得到了广泛的应用。
Seawater is generally weakly alkaline, so seawater has the ability to naturally absorb sulfur dioxide. Some foreign desulfurization companies have successfully developed seawater desulfurization process by taking advantage of this characteristic of seawater. This process does not produce any waste, and has the characteristics of mature technology, simple process, reliable system operation and high desulfurization efficiency. It has been widely used in some coastal countries and regions.
6、钠碱法脱硫
6. Sodium alkali desulfurization
钠碱法脱硫是先用活性非常强的钠碱作为吸收剂吸收二氧化硫，然后再用钙碱对吸收液进行再生，由于在吸收和吸收液处理中使用了不同类型的碱，故称为钠钙双碱法。钠碱法脱硫一般只有一个循环水池，在循环水池内的灰渣时烟灰、反应生成物亚硫酸钙、硫酸钙及石灰渣和未完全反应的石灰同时被，清出的灰渣是一种混合物不易被利用而形成废渣。
Sodium alkali desulfurization is to absorb sulfur dioxide with very active sodium alkali as absorbent, and then regenerate the absorption solution with calcium alkali. Because different types of alkali are used in the absorption and absorption solution treatment, it is called sodium calcium double alkali method. Generally, there is only one circulating water tank for sodium alkali desulfurization. When the ash in the circulating water tank is removed, the soot, the reaction products calcium sulfite, calcium sulfate, lime slag and the incompletely reacted lime are removed at the same time. The cleaned ash is a mixture that is not easy to be used to form waste slag.
综合来看，石灰石石膏脱硫是比较传统的湿法脱硫技术，也是运用广泛的方法之一，相对的海水脱硫、氨法脱硫和钠碱法脱硫都有一定的限制条件。
In general, limestone gypsum desulfurization is a relatively traditional wet desulfurization technology and one of the widely used methods. Compared with seawater desulfurization, ammonia desulfurization and sodium alkali desulfurization, there are certain restrictions.
The above is the detailed introduction of wet desulfurization for you. I hope it will help you. If you have any questions, please contact us. We will provide services for you with a professional attitude https://www.hneee.net
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