Combined Bed Methanol to Gasoline Process

Abstract

A process for preparing gasoline from methanol by means of a combined bed comprises the following process steps: preheating raw material methanol by means of a preheater (18); feeding the preheated raw material methanol into an evaporator (19) and completely gasifying the raw material methanol; enabling the gasified raw material methanol and a recycling gas enter into a combined constant temperature reactor (21) from a mixed-gas inlet pipe, discharging the raw material methanol and the recycling gas from a mixed-gas outlet pipe, and feeding a catalyst from a feeding port to carry out a reaction; discharging the product from the discharging port, and then feeding the product into a condenser (22) in two paths, condensing the product, and enabling the product to enter a gas-liquid separator (20); outputting the separated gas as circulating gas, and outputting liquid into an oil-water separator (23) for separation, so as to obtain finished oil and water. The process overcomes the defects of high operation pressure, high feeding temperature, large recirculating ratio, much more generated invalid low-temperature heat, inconvenience in reutilization, and inconvenience in large-scale industrial production.

Description

technical field

[0001] The invention relates to the field of chemical process flow, in particular to a combined bed methanol-to-gasoline process. Background technique

[0002] Combined bed methanol to gasoline is a strong exothermic reaction, and there are currently reactors including fixed bed reactors, fluidized bed reactors and multi-tubular reactors. The disadvantages of fixed-bed reactors in use are: the released heat cannot be well removed from the reactor, resulting in runaway temperatures, and it is necessary to use a circulating gas that is more than 7 times larger than the feed methanol for temperature control, which seriously affects the quality of the reaction products. The stability and the service life of the catalyst shorten the regeneration period of the catalyst, and the process and equipment are complex, high energy consumption, and high investment; the disadvantages of the fluidized bed reactor in use are: the catalyst entrained in the reaction product nee...

Examples

Embodiment Construction

[0034] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

[0035] Referring to the accompanying drawings, it can be seen that the combined bed methanol-to-gasoline process comprises the following process steps:

[0036] Step 1: preheating the raw material methanol through a preheater 18;

[0037] Step 2: input the preheated raw material methanol into the evaporator 19, and the gasification temperature is 120-160°C, so that the raw material methanol reaches a complete gasification state;

[0038] Step 3: The gasification raw material methanol output in the evaporator 19 and the recycle gas 26 output by the gas-liquid separator 20 are input into the combined constant temperature reactor 21 from the ...

technical field

[0001] The invention relates to the field of chemical process flow, in particular to a combined bed methanol-to-gasoline process. Background technique

[0002] Combined bed methanol to gasoline is a strong exothermic reaction, and there are currently reactors including fixed bed reactors, fluidized bed reactors and multi-tubular reactors. The disadvantages of fixed-bed reactors in use are: the released heat cannot be well removed from the reactor, resulting in runaway temperatures, and it is necessary to use a circulating gas that is more than 7 times larger than the feed methanol for temperature control, which seriously affects the quality of the reaction products. The stability and the service life of the catalyst shorten the regeneration period of the catalyst, and the process and equipment are complex, high energy consumption, and high investment; the disadvantages of the fluidized bed reactor in use are: the catalyst entrained in the reaction product nee...

Examples

Embodiment Construction

[0034] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

[0035] Referring to the accompanying drawings, it can be seen that the combined bed methanol-to-gasoline process comprises the following process steps:

[0036] Step 1: preheating the raw material methanol through a preheater 18;

[0037] Step 2: input the preheated raw material methanol into the evaporator 19, and the gasification temperature is 120-160°C, so that the raw material methanol reaches a complete gasification state;

[0038] Step 3: The gasification raw material methanol output in the evaporator 19 and the recycle gas 26 output by the gas-liquid separator 20 are input into the combined constant temperature reactor 21 from the ...

Images