硫酸銨多為副產(chǎn)物，以硫酸銨水溶液形式排出，因此蒸發(fā)、濃縮、結(jié)晶成為了硫酸銨常用的工藝路線，今天小編和大家一起聊聊硫酸銨多效蒸發(fā)結(jié)晶工藝。
Ammonium sulfate is mostly a by-product, which is discharged in the form of ammonium sulfate aqueous solution. Therefore, evaporation, concentration and crystallization have become the common process routes of ammonium sulfate. Today, I want to talk about the multi effect evaporation and crystallization process of ammonium sulfate with you.
硫酸銨工業(yè)廢水嚴(yán)重污染環(huán)境，通過蒸發(fā)結(jié)晶工藝對(duì)廢水中的硫酸銨進(jìn)行回收再利用，既減少了水污染，又能回收利用有價(jià)值的農(nóng)業(yè)產(chǎn)品。硫酸銨目前基本來源于煉焦行業(yè)、已內(nèi)酰胺、硫酸尾氣脫硫、電廠脫硫、丙烯腈以及甲基丙烯酸甲酯、氧化鋅等副產(chǎn)。
Ammonium sulfate industrial wastewater seriously pollutes the environment. The recovery and reuse of ammonium sulfate in wastewater through evaporation crystallization process can not only reduce water pollution, but also recycle valuable agricultural products. At present, ammonium sulfate basically comes from coking industry, caprolactam, sulfuric acid tail gas desulfurization, power plant desulfurization, acrylonitrile, methyl methacrylate, zinc oxide and other by-products.
針對(duì)硫酸銨進(jìn)行蒸發(fā)結(jié)晶處理，常見工藝有多效蒸發(fā)結(jié)晶工藝、MVR蒸發(fā)工藝，今天小編講解硫酸銨多效蒸發(fā)結(jié)晶工藝。
For the evaporation crystallization treatment of ammonium sulfate, the common processes include multi effect evaporation crystallization process and MVR evaporation process. Today's editor will focus on the multi effect evaporation crystallization process of ammonium sulfate.
硫酸銨蒸發(fā)結(jié)晶工藝選定是根據(jù)硫酸銨物料成分以及工廠實(shí)際情況進(jìn)行選擇，工廠內(nèi)有蒸汽，需要的場(chǎng)地面積大，均可采用硫酸銨多效蒸發(fā)結(jié)晶工藝進(jìn)行硫酸銨廢水處理。
The selection of ammonium sulfate evaporative crystallization process is based on the material composition of ammonium sulfate and the actual situation of the factory. There is steam in the factory and the required site area is large. Ammonium sulfate multi effect evaporative crystallization process can be used for ammonium sulfate wastewater treatment.
硫酸銨多效蒸發(fā)結(jié)晶工藝原理和流程
Principle and process of ammonium sulfate multi effect evaporative crystallization process
多效蒸發(fā)結(jié)晶技術(shù)是將一個(gè)蒸發(fā)器產(chǎn)生的二次蒸汽引入后一個(gè)蒸發(fā)器的加熱室作為熱源。
Multi effect evaporative crystallization technology is to introduce the secondary steam produced by one evaporator into the heating chamber of the latter evaporator as a heat source.
處理含硫酸銨的工業(yè)廢水的方法，先將廢水進(jìn)行預(yù)處理，然后再蒸發(fā)、濃縮，結(jié)晶，后采用離心機(jī)進(jìn)行分離，其主要技術(shù)特點(diǎn)是先將廢水進(jìn)行預(yù)處理，然后利用多效蒸發(fā)結(jié)晶器蒸發(fā)結(jié)晶。
The method of treating industrial wastewater containing ammonium sulfate is to pretreat the wastewater first, then evaporate, concentrate and crystallize, and then separate it by centrifuge. Its main technical feature is to pretreat the wastewater first, and then evaporate and crystallize by using multi effect evaporation crystallizer.
硫酸銨多效蒸發(fā)結(jié)晶工藝要根據(jù)硫酸銨設(shè)計(jì)參數(shù)進(jìn)行選擇具體的工藝流程，具體舉例以三效蒸發(fā)結(jié)晶工藝為例：
The multi effect evaporation crystallization process of ammonium sulfate should be selected according to the design parameters of ammonium sulfate. For specific examples, take the three effect evaporation crystallization process as an example:
硫酸銨蒸發(fā)結(jié)晶時(shí)物料依次進(jìn)入三效、一效、二效蒸發(fā)器進(jìn)行蒸發(fā)濃縮，濃縮后的物料由出料泵送下一工序。
When ammonium sulfate evaporates and crystallizes, the materials enter the three effect, first effect and second effect evaporators for evaporation and concentration, and the concentrated materials are pumped to the next process by the discharge pump.
硫酸銨物料流向：原液進(jìn)入進(jìn)料泵送預(yù)熱器，經(jīng)換熱后入三效蒸發(fā)器，再進(jìn)入一效蒸發(fā)器，后經(jīng)一效過料泵進(jìn)入到二效蒸發(fā)器，一效、二效、三效蒸發(fā)器通過物料泵進(jìn)行效內(nèi)循環(huán)。蒸發(fā)濃縮到一定濃度時(shí)，通過出料泵送稠厚器，然后進(jìn)入離心機(jī)進(jìn)行離心分離。
Flow direction of ammonium sulfate material: the raw liquid enters the feed pump and is sent to the preheater. After heat exchange, it enters the three effect evaporator first, then the first effect evaporator, and then the second effect evaporator through the first effect feed pump. The first effect evaporator, the second effect evaporator, and the third effect evaporator carry out effective internal circulation through the material pump. When the evaporation concentration reaches a certain concentration, it is sent to the thickener through the discharge pump, and then enters the centrifuge for centrifugal separation.
硫酸銨多效蒸發(fā)結(jié)晶工藝蒸汽流向：由蒸汽總管進(jìn)入到一效加熱室作為熱源，一效分離室產(chǎn)生的二次蒸汽進(jìn)入到二效加熱室，作為二效的熱源使用，二效分離室出來的二次蒸汽進(jìn)入三效加熱室，作為三效熱源使用。三效分離室出來的二次蒸汽進(jìn)入預(yù)熱器換熱后，再進(jìn)入冷凝器，冷凝下來的冷凝液進(jìn)入冷凝水罐。
The steam flow direction of ammonium sulfate multi effect evaporation crystallization process: from the steam header into the first effect heating chamber as the heat source, the secondary steam generated by the first effect separation chamber enters the second effect heating chamber as the heat source of the second effect, and the secondary steam from the second effect separation chamber enters the third effect heating chamber as the heat source of the third effect. The secondary steam from the three effect separation chamber enters the preheater for heat exchange, then enters the condenser, and the condensed condensate enters the condensate tank.
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