SVPS-01 Liquid Saturation Vapor Pressure Analyzer Developed

Liquid saturation vapor pressure is the basic thermodynamic data of material. Not only does it play an important role in the field of chemistry, chemical industry, material and medicine, but also it is the essential data in engineering calculation. With the depletion of fossil resources, environment-friendly chemicals based on natural renewable resources get more and more attention. The liquid saturation vapor is one of the most important physical property data of liquid. On the one hand, it is the essential data on the development and application of liquid natural products. On the other hand, it is the significant basic data in the design of separation and purification. However, the existing liquid saturation vapor pressure measurement devices have some disadvantages. The accuracy of them are low and the operation of them are complicated. So, the problems of liquid saturation vapor devices are plenty to solve.At the moment, there are some problems with the experiments of the liquid saturation vapor measurement based on the static method. Firstly, the operation of balance pipes is complicated and time-consuming. In the second place, due to the refrigeration of the experiments using tap water, the experiments consume a large amount of water. Besides, the flow control is not stable and the experimental data is not reliable. In addition, all parts of the experimental devices are cluttered and the experiments are unsafe. This thesis proposes a new liquid saturation vapor pressure measurement instrument. This new instrument has many advantages. For example, the experimental data is accurate and the testing is efficient.In this thesis, the research content and results mainly include the following respects:1. The design of the balance pipe. This thesis adds the communicating pipe and buffering ball into the balance pipe. On the first place, in the process of adding the liquid, the liquid flows through the communicating pipe into the sample pipe directly. Secondly, the time of adding sample is shortened and the operation of adding sample is simple. What’s more, the operation of cleaning the balance pipe is enhanced and the experiment is efficient. In the last place, the suck-back phenomenon is avoided.2. The design of the organic glass devices. It includes the design of the water bath, the buffer tank and the ice storage tank. This thesis proposes two design proposals. In one design proposal, the water bath, buffer tank and ice storage tank as a whole. The buffer tank is a cylinder and there is an atmospheric valve in it. The buffer tank is between the water bath and the ice storage tank. In the other design proposal, the buffer tank and the ice storage tank as a whole and the water bath is alone. Both of the two design proposals meet the experimental requirements.3. The design of the pressure system. It includes the design of the pressure generator assembly and the pressure adjustment assembly. The pressure generator assembly consists of the diaphragm pump and the water ejector device. It supplies constant pressure. After the pressure is generated, the pressure adjustment assembly is in charge of adjusting the pressure. It supplies stable pressure and the pressure is readable.4. The design of the refrigeration system. It includes the design of the external refrigeration device and the internal radiator device. The design of the external refrigeration adopts the ice water refrigeration method. Not only does this method prevent the sample from volatilizing, but it also avoids blocking the tube. The design of the internal radiator device adopts the air cooling method. Compared to the water cooling method, this method saves the water resource.In a word, this thesis proposes a new liquid saturation vapor measurement instrument which can supply accurate measurements and meet the experimental requirements.