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Methanol synthesis device and methanol synthesis method

A technology for methanol synthesis and crude methanol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of reducing reaction rate, high requirements, increasing system power consumption, etc., and achieves high efficiency and energy consumption. low effect

Inactive Publication Date: 2017-03-22
CHENGDU SEPMEM SCI & TECH
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  • Application Information

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Problems solved by technology

[0004] In the existing process, the use of a large amount of recycle gas not only greatly increases the power consumption of the system, but also dilutes the effective components in the reactants (usually referring to CO and CO 2 ) concentration, reducing the reaction rate
At the same time, due to the existence of the cycle mechanism, the inert gas (such as N 2 , Ar, CH 4 etc.) are continuously accumulated during the cycle, and the concentration of inert gas in the system must be controlled by discharging a certain amount of purge gas. The discharge of purge gas also takes away a large amount of effective components. , the existing methanol synthesis process has higher requirements on the source of raw material gas and the front-end gas production section

Method used

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  • Methanol synthesis device and methanol synthesis method
  • Methanol synthesis device and methanol synthesis method
  • Methanol synthesis device and methanol synthesis method

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Embodiment 1

[0045] Please refer to figure 1 , this embodiment provides a methanol synthesis device 100, which includes a plurality of reaction structures 100a and a cooling medium supply device 160.

[0046] The methanol synthesis device 100 includes N reaction structures 100a arranged in sequence from front to back. Reaction structure 100a comprises methanol synthesis reactor 110 and gas-liquid separator 140 (refer to figure 2 ). The methanol synthesis reactor 110 has a reactant inlet 112 and a material outlet 114 (refer to image 3 ). Gas-liquid separator 140 has material inlet 142, gas phase outlet 144 and liquid phase outlet 146 (referring to Figure 4 ). In the reaction structure 100a, the material outlet 114 of the methanol synthesis reactor 110 communicates with the material inlet 142 of the gas-liquid separator 140 . Between two adjacent reaction structures 100a, the gas phase outlet 144 of the gas-liquid separator 140 of the former reaction structure 100a communicates with...

Embodiment 2

[0068] Please refer to Figure 10 , this embodiment provides a method 200 for synthesizing methanol, including reactions from the first stage to the Nth stage in series.

[0069] Through the reactant inlet of the first-stage methanol synthesis reactor, the synthesis gas is introduced into the first-stage methanol synthesis reactor for reaction to obtain the first-stage reaction material; the first-stage reaction material in the first-stage methanol synthesis reactor passes through the first The material outlet of the first-stage methanol synthesis reactor is drawn out, and after being cooled, it is sent to the first-stage gas-liquid separator through the material inlet of the first-stage gas-liquid separator, and the gas phase and crude methanol are separated to obtain the gas phase and crude methanol; the first-stage gas-liquid separator The crude methanol is discharged through the liquid phase outlet of the first-stage gas-liquid separator to complete the first-stage reactio...

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Abstract

The invention relates to the chemical field, in particular to a methanol synthesis device and a methanol synthesis method and aims to solve the problems of high energy consumption and low efficiency in the prior art. The methanol synthesis device comprises N reaction structures which are sequentially arranged from front to back. Each reaction structure comprises a methanol synthesis reactor and a gas-liquid separator, the methanol synthesis reactor comprises a reactant inlet and a material outlet, and the gas-liquid separator comprises a material inlet, a gas phase outlet and a liquid phase outlet. In each reaction structure, the material outlet of the methanol synthesis reactor is communicated with the material inlet of the gas-liquid separator. For every two adjacent reaction structures, the gas phase outlet of the gas-liquid separator of the former reaction structure is communicated with the reactant inlet of the methanol synthesis reactor of the later reaction structure. N is a positive integer larger than or equal to 2. The device is low in energy consumption and high in efficiency. The methanol synthesis method can be used for synthesizing methanol by the aid of the device. The energy consumption can be reduced and the methanol synthesis rate can be increased by using the method.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a methanol synthesis device and a methanol synthesis method. Background technique [0002] Methanol is one of the main raw materials for the preparation of olefinic compounds. With the continuous expansion of the use of olefinic compounds, the market demand for methanol is increasing. At present, industrial methanol is composed of CO, CO 2 、H 2 The synthesis gas is combined under the action of certain temperature, pressure and catalyst. [0003] Methanol synthesis is a reversible, strongly exothermic reaction controlled by thermodynamics and kinetics. Due to the small equilibrium constant of methanol synthesis, the methanol generated in the system has a strong inhibitory effect on the forward reaction. For the one-way reaction, even if the reaction reaches thermodynamic equilibrium, the conversion rate of methanol is still low. Therefore, according to the reaction characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/152C07C31/04
CPCC07C29/152C07C31/04
Inventor 张惊涛陈小林
Owner CHENGDU SEPMEM SCI & TECH