Pressure stabilization and adjustment design for constant-pressure reaction vessels

Abstract

A pressure stabilization and adjustment design for constant-pressure reaction vessels belongs to the field of constant-pressure reaction vessels for liquid-liquid reaction and solid-liquid reaction. A reaction kettle is provided with a constant temperature system. The reaction kettle is connected in series or in parallel with an accumulator through an electromagnetic valve I and an electric control valve I. The design is characterized in that the accumulator is renovated, the original air inflation interface is changed into a normally open sealing interface, and the accumulator can be connected with a constant-temperature and high-pressure air tank through the interface and an electromagnetic valve II and an electric control valve II connected with the interface; and the constant-temperature and high-pressure air tank is equipped with a high-pressure air pump and an electric control valve VIII. In an optimal scheme, the high-pressure air tank and the reaction kettle are equipped with a pressure sensor and a pressure gauge. An extended pressure buffer and air pressure adjustment effect can be achieved, and the pressure of a reactor can be stabilized or stably adjusted through the effect. Moreover, the actual pressure in the reaction kettle can be controlled and adjusted by changing the air pressure of a constant-temperature and constant-pressure air storage tank according to the pressure adjustment need of the reaction kettle in different processes or stages.

Description

technical field [0001] The present invention relates to a pressure stabilization design of a constant pressure reaction vessel, mainly related to the control of large fluctuations in pressure in the vessel caused by some physical processes, chemical reactions and biological processes in the fields of physics, chemistry and biology through accumulators. And it is required to accurately and stably change the pressure design of the reactor during the working process of the reactor. [0002] The invention is funded by the National Natural Science Foundation of China (NSFC) major scientific research instrument development project 41227801 and the Chinese Academy of Sciences scientific research equipment development project "Deep Sea Simulator Abyssource Development". Background technique [0003] With the advancement of science and technology and the development of industrial production, pressure vessels are widely used in petroleum, chemical industry, light industry, medicine, e...

AI Technical Summary

Problems solved by technology

The structure of this control method is complex, and the control response is much slower than the speed of pressure transmission (the pressure transmission speed of liquid is close to the speed of sound), and the time response of most intelligent control systems is much slower than the pressure change and its transmission, so that the process There are still huge pressure fluctuations in the control process, and recently there have been new designs for buffering pressure fluctuations by connecting an accumulator in series or in parallel (Li Huaiming et al., 2009; Wang Yujia et al. 2013; Li Haoran et al., 2016)

However, this method still has obvious defects. On the one hand, due to the pressure buffer limit of the accumulator (for example, the airbag type and the spring type, the gravity piston type is not suitable as an accumulator in a high-pressure environment), the pressure fluctuation is too large, and the accumulator The worse the buffering capacity of the accumulator is, when the gap between the pressure of the accumulator air bag and the set pressure is large, such as more than 0.5 times, the accumulator has almost no pressure buffering capacity, and the pressure change adjustment of several times in the pressure test is often Therefore, the ability of simple series or parallel accumulators to stabilize and control the regulation of pressure is still very limited

That is to say, the closer the original set pressure of the accumulator is to the actual required pressure of the reactor, the better the effect of constant pressure regulation is, and the greater the gap between the pressure and the original set pressure of the accumulator in the actual reaction process, The pressure cushioning ability is worse

On the other hand, changes in the ambient temperature will also cause changes in the pressure of the accumulator, which in turn will cause changes in the pressure of the system, including the reactor. In general, the accumulator in the system is rarely adjusted to a constant temperature

[0005] Although greatly expanding the volume of the accumulator can increase the pressure buffering capacity, because the accumulator is generally small in size, the buffering range of the accumulator is small, and it is difficult to buffer and balance the pressure fluctuations in the experiment or reaction process.

Although the larger the volume of the accumulator, the greater the pressure buffer will be, but it will cause a large amount of reactants in the reactor to enter the accumulator, resulting in the lack of condition control of the reactants actually participating in the reaction, etc.

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