生物脫硫廠家的老板告訴你什么是化學(xué)脫硫法
The boss of the biological desulfurization manufacturer tells you what is chemical desulfurization
在這種方法中，化學(xué)物質(zhì)（有機(jī)溶液或無(wú)機(jī)溶液）滲入煤基材的硫發(fā)生化學(xué)變化，產(chǎn)生可溶性硫化合物，從而達(dá)到脫硫的目的。根據(jù)所用藥物特性的不同，這種方法不僅可以去除有機(jī)硫，還可以去除無(wú)機(jī)硫。如果控制條件得當(dāng)，脫硫效率會(huì)更高?；瘜W(xué)脫硫法可以去除物理脫硫法無(wú)法去除的硫，因此化學(xué)脫硫法特別適用于有機(jī)硫含量高的煤的脫硫。
In this method, chemical substances (organic solution or inorganic solution) infiltrate into the sulfur of the coal substrate to produce soluble sulfur compounds, so as to achieve the purpose of desulfurization. According to the different characteristics of the drugs used, this method can not only remove organic sulfur, but also remove inorganic sulfur. If the control conditions are appropriate, the desulfurization efficiency will be higher. The chemical desulfurization method can remove the sulfur that cannot be removed by the physical desulfurization method, so the chemical desulfurization method is especially suitable for the desulfurization of coal with high organic sulfur content.
但需要注意的是，脫硫藥物在發(fā)生脫硫反應(yīng)的同時(shí)，破壞了精煤的有機(jī)結(jié)構(gòu)，甚至藥物支付與無(wú)硫結(jié)構(gòu)部分發(fā)生反應(yīng)，導(dǎo)致精煤屬性發(fā)生變化。對(duì)于煉焦煤來(lái)說(shuō)，這種煤的結(jié)構(gòu)變化會(huì)導(dǎo)致附著力和結(jié)焦性下降。大多數(shù)無(wú)機(jī)脫硫藥物都含有Na，K脫硫后，離子的堿溶液不可避免地會(huì)附著在煤的一些孔隙中。煤煉成焦炭后，離子在高爐中對(duì)碳溶性反應(yīng)(CCO2=2CO-Q)催化反應(yīng)明顯。因此，煉鐵煤脫硫不宜輕易選用化學(xué)脫硫。
However, it should be noted that the desulfurization drug destroys the organic structure of the cleaned coal while the desulfurization reaction occurs, and even the drug payment reacts with the sulfur-free structure, resulting in changes in the properties of the cleaned coal. For coking coal, the structural change of such coal will lead to the decrease of adhesion and coking. Most inorganic desulfurizing drugs contain Na and K. After desulfurizing, the alkali solution of ions will inevitably adhere to some pores of coal. After coal is converted into coke, the ion catalyzes the carbon solubility reaction (CCO2=2CO-Q) in the blast furnace. Therefore, chemical desulfurization should not be easily selected for ironmaking coal desulfurization.
近年來(lái)，氫脫硫等方法得到了研究和開發(fā)。煤受熱時(shí)，其不穩(wěn)定的含硫結(jié)構(gòu)部分自行分解產(chǎn)生硫化氫。同時(shí)，煤活性自由基獲得氫，可提高煤的附著力。該方法的脫硫效率可達(dá)95%。因此，氫脫硫法特別適用于有機(jī)含硫量高的煉鐵煤脫硫。
In recent years, hydrogen desulfurization and other methods have been studied and developed. When coal is heated, its unstable sulfur-containing structure partially decomposes to produce hydrogen sulfide. At the same time, the active free radical of coal can obtain hydrogen, which can improve the adhesion of coal. The desulfurization efficiency of this method can reach 95%. Therefore, hydrogen desulfurization method is particularly suitable for desulfurization of ironmaking coal with high organic sulfur content.
化學(xué)粉碎方法是選擇藥物（氨）滲入煤，可剝離黃鐵礦與有機(jī)質(zhì)的界面，然后通過(guò)物理方法分離部分黃鐵礦，顯然脫硫效率遠(yuǎn)高于一般物理脫硫方法，幾乎不改變精煤的特點(diǎn)，低于加氫脫硫成本，也適用于煉鐵煤脫硫的發(fā)展?jié)摿Α?/div>
The chemical crushing method is to select drugs (ammonia) to penetrate into the coal, which can peel off the interface between pyrite and organic matter, and then separate part of pyrite through physical methods. Obviously, the desulfurization efficiency is much higher than the general physical desulfurization method, which hardly changes the characteristics of clean coal and is lower than the cost of hydrodesulfurization. It is also applicable to the development potential of ironmaking coal desulfurization.
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