Method and apparatus for producing hydrocarbons by synthesis gas from coal

A technology for coal-based synthesis gas and hydrocarbon synthesis, which is applied in the field of chemical engineering, can solve problems such as losing the catalytic effect of methanol synthesis, and achieve the effects of saving energy consumption, less equipment, and improving utilization rate

Inactive Publication Date: 2015-03-18
杭州林达化工技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art method of producing gasoline from synthesis gas through methanol and dimethyl ether, for example, Chinese invention patent application 200710185293.5, methanol and methanol dehydration catalyst are mixed in the first-stage reactor and then loaded. Methanol is generated, and the dehydration r

Method used

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  • Method and apparatus for producing hydrocarbons by synthesis gas from coal
  • Method and apparatus for producing hydrocarbons by synthesis gas from coal
  • Method and apparatus for producing hydrocarbons by synthesis gas from coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] use as Figure 6 The shown coal-to-synthesis gas-to-hydrocarbons device includes two primary and secondary sets of syngas-to-hydrocarbons devices. The main device includes the first methanol synthesis reactor 1a, the first methanol dehydration reactor 2a, the first gas-liquid separation device 3a, steam drum 4, circulation pump 5, first heat exchanger 11a, preheater 12 and cooler 13, and auxiliary devices include second methanol synthesis reactor 1b, second methanol dehydration reactor 2b, second gas-liquid The separator 3b and the second heat exchanger 11b, the first methanol synthesis reactor 1a, the first heat exchanger 11a, and the first methanol dehydration reactor 2a are connected in sequence, and the gas outlet of the first methanol dehydration reactor 2a is connected to the The first heat exchanger 11a, the preheater 12, the cooler 13 and the first gas-liquid separator 3a are connected successively, and the outlet of the first gas-liquid separator 3a is divided ...

Embodiment 2

[0060] use as Figure 7 The shown coal-to-synthesis gas synthesis hydrocarbon device includes methanol synthesis reactor 1, methanol dehydration reactor 2, gas-liquid separator 3, steam drum 4, circulation pump 5, heat exchanger 11, preheater 12 and Methanation reactor 6, described preheater 12, the first methanol synthesis reactor 1, the first heat exchanger 11, the first methanol dehydration reactor 2 are connected successively, the gas outlet of the first methanol dehydration reactor 2 is connected with The first heat exchanger 11, the preheater 12 and the first gas-liquid separator 3 are connected in sequence, and the outlet of the first gas-liquid separator 3 is divided into two paths, one path is connected with the preheater 12 through a cycle machine, and the other path is connected Methanation reactor 6.

[0061] At a pressure of 3.2MPa and methanol synthesis, only a copper-based methanol synthesis catalyst is installed, at a temperature of 220-270°C and a space veloc...

Embodiment 3

[0065] Using the device and process conditions described in Example 2, the total amount of catalyst loaded in the methanol synthesis reactor 1 is 100M 3 , divided into two groups, the second group consists of the lower 10M 3 Dimethyl ether catalyst and upper layer 20M 3 Methanol synthesis catalyst composition, the first group consists of the lower layer 20M 3 Molecular sieve dimethyl ether catalyst and upper layer 50M 3 Composed of methanol synthesis catalysts, raw material gas passes through the first group of upper layer 50M from top to bottom 3 Methanol is synthesized into methanol, and then through the dimethyl ether catalyst of the first group of lower layer, 70% methanol is dehydrated to generate dimethyl ether and water, and then enters the second group of upper layer 20M 3 Methanol synthesis catalyst synthesizes 5% methanol, and then passes through the second group of lower layer 10M 3 The dimethyl ether catalyst dehydrates 60% methanol into dimethyl ether, and the...

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Abstract

The invention discloses a method for producing hydrocarbons by synthesis gas from coal. Methanol or methanol and dimethyl ether are synthesized by raw gas firstly, and then hydrocarbons are synthesized, wherein the methanol or methanol and dimethyl ether are subjected to a dehydration reaction to generate liquid hydrocarbons, reaction gas for hydrocarbon synthesis is subjected to gas-liquid separation to obtain liquid hydrocarbon products, then a part of the reaction gas are circulated and returned to mix with the raw gas before methanol synthesis, so as to perform methanol synthesis and hydrocarbon synthesis reactions again, and the other part of the reaction gas is discharged or sent to the next section for reaction, as needed. The invention also discloses an apparatus used in the method. The method of the invention adopts a two-step reaction isobaric operation of pressure decrease in methanol synthesis or methanol and dimethyl ether synthesis from synthesis gas in hydrocarbon production by synthesis gas, and pressure increase in hydrocarbon production by dehydration; a catalyst for methanol synthesis and a catalyst for dimethyl ether are filled in a layered manner according to the design requirements, which prevents the reduced methanol catalyst of active copper from oxidation poisoning due to mixing and filling of the two catalysts; the method of the invention has the advantages of short flow, few apparatuses, low investment, saved energy consumption and the like.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a method and equipment for producing hydrocarbons from coal-based synthesis gas. Background technique [0002] The most common method for coal-to-synthesis gas to produce hydrocarbons is to use F-T reaction, such as the large-scale coal-to-oil plant successfully built by Sasol Company in South Africa, but the composition of the F-T reaction product is complex, and further hydrogenation modification is required to refine the product, which requires a long process and equipment Many, big investment. Another method is to synthesize methanol from synthesis gas first, then heat and vaporize liquid methanol, and dehydrate under the action of a catalyst to obtain hydrocarbon oil, that is, industrial methanol dehydration to gasoline. The oil product gasoline is of good quality, but it is necessary to build a methanol synthesis unit and a methanol-to-gasoline unit separately...

Claims

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Application Information

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IPC IPC(8): C10G2/00C10L3/08C07C11/04C07C11/06
CPCC10G2/341C07C1/20C10G2/33C10G2/334C10G2300/701
Inventor 楼韧楼寿林
Owner 杭州林达化工技术工程有限公司
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