Hydrocarbon producing equipment and method based on methyl alcohol normal-temperature feeding reaction

Abstract

The invention discloses hydrocarbon producing equipment based on a methyl alcohol normal-temperature feeding reaction. The equipment adopts low temperature for direct feeding or atomizing feeding, andis composed of a raw material tank, a shell and tube reactor, a condenser, a hydrocarbon product tank, a gas-liquid separator and a communication pipeline, and raw materials in the raw material tankat least comprise methyl alcohol; the shell and tube reactor comprises a cylinder, a constant-temperature tube assembly located in the cylinder, a feeding port formed in the side wall of the cylinderand a discharging port formed in the bottom of the cylinder; the constant-temperature tube assembly comprises multiple constant-temperature tubes, a tube plate and a catalyst fixing device; the tube plate is fixed to the side wall of the cylinder, and the constant-temperature tubes are fixed to the tube plate; the raw material tank is communicated with the shell and tube reactor through the communication pipeline; the condenser is located between the shell and tube reactor and the gas-liquid separator. The equipment has the advantages that the energy and equipment are saved, and the conversionrate is high. The invention further discloses a hydrocarbon producing method based on the methyl alcohol normal-temperature feeding reaction.

Description

technical field [0001] The invention relates to the fields of chemical equipment and chemical process flow, more specifically, it is a hydrocarbon production equipment based on methanol normal temperature feed reaction. The invention also relates to a hydrocarbon production method based on methanol normal temperature feed reaction hydrocarbon production equipment. Background technique [0002] Existing reactors include 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 consu...

AI Technical Summary

Problems solved by technology

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 needs to be removed Separation increases the investment cost of the equipment; because the catalyst in the fluidized bed is moving, it will cause the catalyst to be broken, the powder catalyst is not easy to separate from the reaction product, and the catalyst loss will increase; the multi-tubular reactor is in use The disadvantages are: ordinary tubes are used. Due to the strong exothermic reaction, the temperature difference between the tube side and the shell side is too large. Only materials with large specific heat capacity can be used to remove heat, but the heat cannot meet the requirements of continuous feeding. Raw materials are heated; if there is less heat removed, the bed will overheat and affect the catalyst. Only increase the number of heat exchange tubes, but increasing the heat exchange tubes will greatly increase the cost of equipment; because there is no gas distributor at the feed of multi-tube reactors, Catalyst regeneration will be incomplete

None of these three reactors alone can completely satisfy the relatively efficient use of catalyst in the reactor.

[0003] Existing hydrocarbon production equipment: the operating pressure of the feed port is above 2.2MPa, the feeding temperature is high (requires above 300°C), and the reaction temperature can only enter the reactor; the fixed bed circulation ratio is above 7:1, in order to ensure the reaction conditions and Due to the performance of different catalysts, there are various reactors in the process of exothermic reaction, the process is complex; the volume requirements for equipment are large, which is not convenient for large-scale industrial production; the investment in equipment is large, the production cost is high, and the recovery of refined oil rate is not high

[0004] The existing application number is: CN201510142484, and the patent name is: "Moving Bed Methanol Hydrocarbon Production Method" discloses a methanol production method that uses raw materials to be heated and then fed. The raw materials are fed after high-temperature gasification, and the gasified raw materials are The amount of feed is not easy to control, and the operation is unstable

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