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为什么连二亚硫酸钠叫保险粉?
来源:http://www.jnjrh.com 日期:2019-03-08 发布人:admin
相信很多人多保险粉并不陌生,但是说到连二亚硫酸钠可能就会有些陌生了,那么,为什么连二亚硫酸钠叫保险粉呢?今天,我们就一起来了解一下吧!
  I believe that many people are not unfamiliar with multi-insurance powder, but when it comes to sodium bisulfite, it may be a little unfamiliar. So, why is sodium bisulfite called insurance powder? Today, let's get to know it together.
  为什么连二亚硫酸钠叫保险粉?
  Why is sodium dithionite called insurance powder?
  连二亚硫酸钠俗名保险粉。白色细粒粉末,有时略带黄色或灰色。具有特殊臭味和强还原性。保险粉对于衣物的损伤和氧化剂相比要小的很多,所以叫做保险粉。它可以用于各种纤维的纺织品而不至于造成伤害。但是保险粉对于除了还原染料以外的大多数燃料有破坏作用。所以一般情况下只能用于白色纺织物。保险粉主要用于剥除衣物上的色迹,亦可以使一些陈旧性的灰黄色衣物的色泽更新。还可以用来中和被次氯酸钠或者高锰酸钾漂黄了的白色织物。
  Sodium dithionite is commonly known as insurance powder. White fine powder, sometimes slightly yellow or gray. It has special odor and strong reducibility. The damage of powders to clothing is much less than that of oxidants, so they are called powders. It can be used in textiles of various fibers without causing harm. But powders are destructive to most fuels except VAT dyes. So it can only be used for white textiles in general. Safety powder is mainly used to strip the stains on clothes, and can also renew the color of some old grey and yellow clothes. It can also be used to neutralize white fabrics yellowed by sodium hypochlorite or potassium permanganate.
  无水硫酸钠的生产过程,主要由硝水制备、蒸发结晶、离心脱水、干燥、气固分离、包装等操作组成。其中硝水制备、蒸发、干燥等操作均要消耗大量的热能,其加热介质是蒸汽,热能耗占生产成本约为10%。因此,无水硫酸钠工艺的设计,一定要高度重视热能的有效利用,提高热能利用率,以便达到节能降耗,降低生产成本,提高经济效益之目的。
氨基磺酸
  The production process of anhydrous sodium sulfate is mainly composed of nitrate preparation, evaporation crystallization, centrifugal dehydration, drying, gas-solid separation, packaging and other operations. The operation of nitrate preparation, evaporation and drying consumes a lot of heat energy. The heating medium is steam, and the heat energy consumption accounts for about 10% of the production cost. Therefore, the design of anhydrous sodium sulfate process must attach great importance to the effective use of heat energy and improve the utilization rate of heat energy, so as to achieve the purpose of saving energy, reducing production costs and improving economic benefits.
  为了提高无水硫酸钠生产的热能利用率,在生产工艺中一般都要千方百计提高蒸汽的利用次数。因此,在现行的生产工艺中,蒸发器效数有增加的趋势,过去多为双效,现在一般为四效或五效。同时,蒸发器加热室冷凝水也都再次闪发利用,不象过去直接排掉或冷却回锅炉。在一些厂家还对末效二次蒸汽进行利用,用其来化硝。还有一些厂家用硝水与其换热,普遍重视了热能的利用。
  In order to improve the utilization rate of heat energy in the production of anhydrous sodium sulfate, it is necessary to do everything possible to increase the utilization times of steam in the production process. Therefore, in the current production process, the evaporator efficiency has an increasing trend. In the past, most of the evaporators were double-effect, but now they are generally four-effect or five-effect. At the same time, the condensed water in evaporator heating chamber is also used again, unlike in the past, it is discharged directly or cooled back to the boiler. In some factories, the final secondary steam is also used to nitrate. There are also some factories that use nitrate water to heat transfer with it, and generally attach importance to the utilization of heat energy.