一、概述：
相平衡反应釜系统基本可分为两类：静态法和动态法；按测定原理间接法包括露点法、泡点法和总压法，直接法根据测定装置及操作原理的不同分为蒸馏法、循环法、静态法和流动法等。
与不可视的高压釜相比，石英可视窗有利于对系统内两平衡相的量进行观察，避免出现一相消失的情况，保证了高压测定的准确性和可靠性。特别在近临界点出现的临界乳光现象容易被观察到。
本装置主要用于化工、材料行业、大专院校、科研机构对材料的物性分析处理。
二、系统主要性能：
系统工作压力：20MPa
工作温度：＜90℃（恒温箱加热）
电源电压：AC220V 50Hz
三、可视变容相态釜：
①容积：30mL，釜内腔与视窗等高，视窗可观察整个内腔相态；
②工作压力：20MPa，釜用压力表为0.25级；
③工作温度：＜100℃，采用上下可移动的恒温箱、水浴加热方式
④出入口采用一个接口，在反应装置上端，接管为φ3；
⑤釜内腔带测温装置；
⑥底部磁子搅拌，搅拌速度可调节；
⑦顶部活塞可移动距离接近内腔高度，活塞在腔内只作平行移动，不转动。
四、设备主要性能特点：
1、采用TGI公司高压可视玻璃，抗压强度高，透明度高，安全性能好，配备的密封材料为原装进口，大大提高了设备密封性能。
2、CO2注入泵密封材料采用四氟合成材料，抗CO2溶胀，耐磨性强，设备维修率低。
3、采用顶部可移动方式实现变容变压，保证相态平衡时所需的各种压力状态。
4、配带汲取管的CO2钢瓶，保证液态CO2从钢瓶底部液态流出，便于液态的CO2供应冷凝器储罐，使CO2注入泵正常工作，提高CO2的利用率。
I. Overview:
Phase equilibrium reactor system can be basically divided into two categories: static method and dynamic method; According to the determination principle, indirect methods include dew point method, bubble point method and total pressure method, while direct methods are divided into distillation method, circulation method, static method and flow method according to the difference of determination device and operation principle.
Compared with the invisible autoclave, the Shi Ying window is beneficial to observe the quantity of two equilibrium phases in the system, avoiding the disappearance of one phase, and ensuring the accuracy and reliability of high-pressure measurement. Especially near the critical point, the critical opalescence phenomenon is easy to be observed.
This device is mainly used in chemical industry, material industry, universities and scientific research institutions to analyze and process the physical properties of materials.
Second, the main performance of the system:
System working pressure: 20MPa
Working temperature: < 90℃ (heated by thermostat)
Power supply voltage: AC220V 50Hz
Three, visual variable volume phase kettle:
① Volume: 30mL, the inner cavity of the kettle is as high as the window, and the phase state of the whole inner cavity can be observed through the window;
② Working pressure: 20MPa, and the pressure gauge for kettle is 0.25;
(3) Working temperature: < 100℃, using a vertically movable thermostat and water bath heating mode.
(4) an interface is adopted at the entrance and exit, at the upper end of the reaction device, the connecting pipe is φ 3;
⑤ The inner cavity of the kettle is provided with a temperature measuring device;
⑥ The bottom magneton is stirred, and the stirring speed can be adjusted;
⑦ The movable distance of the piston at the top is close to the height of the cavity, and the piston only moves in parallel in the cavity and does not rotate.
Four, the main performance characteristics of equipment:
1. TGI company's high-pressure visible glass is adopted, which has high compressive strength, high transparency and good safety performance. The sealing material is imported from original equipment, which greatly improves the sealing performance of the equipment.
2. The sealing material of CO2 injection pump is made of tetrafluoroethylene, which is resistant to CO2 swelling, strong in wear resistance and low in equipment maintenance rate.
3. The top can be moved to realize the variable capacity and pressure transformation, so as to ensure all kinds of pressure states required for phase equilibrium.
4. Equipped with a CO2 cylinder with a dip tube to ensure that the liquid CO2 flows out from the bottom of the cylinder, which is convenient for the liquid CO2 to be supplied to the condenser storage tank, so that the CO2 injection pump can work normally and the utilization rate of CO2 can be improved.
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