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氨基磺酸连续结晶装置DTB+OSLO生产制备过程
来源:http://www.jnjrh.com 日期:2019-08-01 发布人:admin
一、物性概略
I. General Physical Property
氨基磺酸NH2SO3H分子量97.09
Molecular Weight of NH2SO3H Sulfamate 97.09
白色斜方晶体。无味无臭,不挥发,不吸湿。别名固体硫酸,因其水溶液与硫酸、盐酸具有同等酸性而得名。
White orthorhombic crystal. No odor, no volatility, no moisture absorption. The alias solid sulfuric acid is named because its aqueous solution has the same acidity as sulfuric acid and hydrochloric acid.
密度:2.126
Density: 2.126
熔点:205℃(209℃开端合成,260℃合成放出SO2、SO3、N2和水及其它微量产物)
Melting point: 205 C (starting at 209 C, synthesizing at 260 C and releasing SO2, SO3, N2, water and other trace products)
折射率:α型1.553,β型1.563,γ型1.568
Refractive index: alpha type 1.553, beta type 1.563, gamma type 1.568
折射系数(25±3℃):1.553~1.568
Refractive coefficient (25 + 3 C): 1.553-1.568
离解常数:1.10×10-2
Dissociation constant: 1.10 *10-2
生成热:685.9kJ/mol
Heat of formation: 685.9 kJ/mol
溶解性:易溶于水和液氨,在水溶液中呈中等酸性,微溶于甲醇,不溶于乙醇和乙醚。
Solubility: Soluble in water and liquid ammonia, medium acidity in aqueous solution, slightly soluble in methanol, insoluble in ethanol and ether.
水中溶解度:
Water solubility:
0℃13.3%
13.3% at 0 C
80℃33%
33% at 80 C
二、来料参数
II. incoming parameters
进料称号:氨基磺酸溶液
Feed Title: Amino Sulfonic Acid Solution
氨基磺酸浓度:15.25%
Aminosulfonic acid concentration: 15.25%
硫酸浓度:12~20%
Sulfuric acid concentration: 12-20%
氨基磺酸
温度:75℃
Temperature: 75 C
来料量:35t/h
Input: 35t/h
三、处置请求
III. Disposal of requests
冷却温度:10℃
Cooling temperature: 10 C
母液浓度:6.5%(氨基磺酸)
Concentration of mother liquor: 6.5% (aminosulfonic acid)
产量:3.3t/h(80t/d)
Output: 3.3t/h (80t/d)
四、工艺阐明
IV. PROCESS DESCRIPTION
(1)连续结晶简介
(1) Brief introduction of continuous crystallization
结晶过程是一个复杂的传热传质过程。过饱和度是物料结晶的推进力,但当过饱和度超出介稳区时将产生大量细晶,这在连续结晶过程中是需求防止的。普通来说,连续结晶都是在全密闭条件下停止的,原料连续参加,晶浆连续排出,能够便当地控制其温度、压力和浓度。经过对温度、压力、循环流量、蒸发量、晶浆比等参数的准确控制,能够精确的控制料液的过饱和度,给结晶过程提供恒定的推进力,使物料一直处在合适结晶的状态。连续结晶设备设有晶浆循环系统,可为晶浆提供良好的流体动力学条件,使结晶的传质充沛、疾速。
Crystallization is a complex process of heat and mass transfer. Supersaturation is the driving force of material crystallization, but when the supersaturation exceeds the metastable region, a large number of fine grains will be produced, which needs to be prevented in the continuous crystallization process. Generally speaking, continuous crystallization is stopped under fully closed conditions. Raw materials are continuously participated in, and the slurry is continuously discharged, which can conveniently control its temperature, pressure and concentration. Through the accurate control of temperature, pressure, circulation flow rate, evaporation rate, crystal slurry ratio and other parameters, the supersaturation of feed liquid can be accurately controlled, and constant propulsion force can be provided for the crystallization process, so that the material has been in the most suitable crystallization state. Continuous crystallization equipment is equipped with slurry circulation system, which can provide good hydrodynamic conditions for the slurry and make the mass transfer of crystallization abundant and rapid.
连续结晶设备与传统的间歇结晶器相比具有许多显著的优点:收率高、母液少、产质量量好、自动化水平高、设备占空中积小、操作人员少等优点。
Compared with traditional batch crystallizer, continuous crystallizer has many remarkable advantages, such as high yield, less mother liquor, good quality, high automation level, small occupied space of equipment and less operator.
(2)工艺选型
(2) Process selection
综合系统能耗,结晶工艺采用:一级闪蒸结晶+二级冷却结晶。
According to the energy consumption of the system, the crystallization process is as follows: first-order flash crystallization + second-order cooling crystallization.
75℃高温物料经进料泵打入一级闪蒸结晶器,经过闪蒸溶液温度降到48℃,闪蒸出的蒸汽进入一、二级间接冷凝器,和冷却循环水换热后,冷凝水进入冷凝水罐。
The high temperature material at 75 C is pumped into the first-stage flash crystallizer, and the temperature of the flash solution drops to 48 C. The steam from the flash enters the first and second-stage indirect condensers. After heat exchange with the cooling circulating water, the condensed water enters the condensation tank.
一级闪蒸结晶器中48℃晶浆经结晶过料泵打入二级冷却结晶器中,经过和外冷器中冷媒换热,二级结晶器中晶浆温度控制在10℃,晶浆从二级结晶器中采出进入稠厚器,进一步消弭溶液的过饱和同时给离心机缓冲喂料。离心母液局部返回二级结晶器中调理含固量,另一局部排出。
The crystalline slurry at 48 C in the first stage flash crystallizer is pumped into the second stage cooling crystallizer through the crystallization overcharge pump, and heat exchanged with the refrigerant in the external cooler. The temperature of the crystalline slurry in the second stage crystallizer is controlled at 10 C. The crystalline slurry is extracted from the second stage crystallizer into the thickener, which further eliminates the supersaturation of the solution and buffers the feed to the centrifuge. Centrifugal mother liquor partially returns to secondary crystallizer to adjust solid content, and the other partially discharges.