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Method for converting dimethyl ether into gas mainly containing hydrogen and directly combusting gas in industry

A dimethyl ether and gas technology, applied in the field of combustion after gas conversion, can solve the problems of difficult combustion of dimethyl ether, no practical value, pungent odor, etc. Effect

Inactive Publication Date: 2015-07-22
纪福光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a cheap fuel, dimethyl ether has oxygen content, low carbon chain, sufficient and safe combustion, no carbon loss in the combustion process, no black smoke, no residual liquid, and combustion tail gas meets national standards, so dimethyl ether has been used as a fuel It is widely used, but the combustion calorific value of dimethyl ether is about 29000KJ / KG-31450KJ / KG, compared with the combustion calorific value of LPC liquefied petroleum gas 46000KJ / KG, it reaches 0.63 of LPC liquefied petroleum gas, so in proportion Calculation, with the calorific value produced by 1 kg of liquefied petroleum gas, it is necessary to use the calorific value of 1.58 kg of dimethyl ether as a comparison, so there is no practical value in economical proportion calculations; if dimethyl ether is used in industrial burners, For example, ceramic factories, aluminum factories, glass factories, the flow rate is large, the burner cannot burn under the pressure, a lot of fuel is wasted, and there is a pungent smell, and it is difficult to raise the high temperature, and the consumption is greater than that of LPC liquefied petroleum gas. More than 1.6 times, so dimethyl ether is difficult to burn in industry

Method used

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  • Method for converting dimethyl ether into gas mainly containing hydrogen and directly combusting gas in industry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] refer to figure 1 Shown, the present invention discloses a kind of method that dimethyl ether is converted into hydrogen-based gas and directly burned in industry, the method comprises the following steps:

[0020] A, after dimethyl ether is decompressed, at first carry out preheating in cold heat exchanger 1;

[0021] b. The preheated dimethyl ether is passed into the superheater 2 for heating. The heating temperature is 250°C and the pressure is 0.3Mpa. The superheater 2 includes four superheating pipes 201 connected in sequence. The space is connected by a hollow connecting pipe 202, and the overheating pipe 201 is provided with a spiral electric heating tube 203, through which the dimethyl ether gas is heated; the superheater 2 is provided with a gas inlet and a gas outlet, and the inlet pipe is provided with Check valve 204 and pressure gauge 205; And above-mentioned overheating pipe 201 is seamless steel pipe;

[0022] c. The gas heated by the heater 2 is sent t...

Embodiment 2

[0026] A, after dimethyl ether is decompressed, at first carry out preheating in cold heat exchanger 1;

[0027] b. The preheated dimethyl ether is passed into the superheater 2 for heating. The heating temperature is 400°C and the pressure is 0.5Mpa. The superheater 2 includes four superheating pipes 201 connected in sequence. The space is connected by a hollow connecting pipe 202, and the overheating pipe 201 is provided with a spiral electric heating tube 203, through which the dimethyl ether gas is heated; the superheater 2 is provided with a gas inlet and a gas outlet, and the inlet pipe is provided with Check valve 204 and pressure gauge 205; And above-mentioned overheating pipe 201 is seamless steel pipe;

[0028] c. The gas heated by the heater 2 is sent to the reactor 3. The catalyst 301 is installed in the reactor 3. The heated gas undergoes a cracking reaction under the action of the catalyst 301. The reaction temperature is 400°C and the pressure is 0.5Mpa The mai...

Embodiment 3

[0032] A, after dimethyl ether is decompressed, at first carry out preheating in cold heat exchanger 1;

[0033] b. The preheated dimethyl ether is passed into the superheater 2 for heating. The heating temperature is 325°C and the pressure is 0.4Mpa. The superheater 2 includes four superheating pipes 201 connected in sequence. The space is connected by a hollow connecting pipe 202, and the overheating pipe 201 is provided with a spiral electric heating tube 203, through which the dimethyl ether gas is heated; the superheater 2 is provided with a gas inlet and a gas outlet, and the inlet pipe is provided with Check valve 204 and pressure gauge 205; And above-mentioned overheating pipe 201 is seamless steel pipe;

[0034] c. The gas heated by the heater 2 is sent to the reactor 3. The catalyst 301 is installed in the reactor 3. The heated gas undergoes a cracking reaction under the action of the catalyst 301. The reaction temperature is 325°C and the pressure is 0.4Mpa The mai...

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Abstract

The invention discloses a method of converting dimethyl ether into gas mainly containing hydrogen and directly combusting gas in industry. Mainly through preheating of dimethyl ether firstly, dimethyl ether is sent to a heater for heating after preheating, wherein the heater includes multiple successive connection superheating tubes; then the dimethyl ether gas heated by the heater is transmitted into a reactor, a catalyst is arranged in the reactor, and dimethyl ether is prompted to undergo a cracking reaction by the catalyst; after the cracking reaction occurs, the generated gas contains a main component which is hydrogen, and the generated gas also contains a small amount of methane and ethane; after the reaction is completed, the gas generated in the reaction is cooled down and then is transmitted to a gas storage tank for storage, and the gas can be used for combustion. The method has the beneficial effects that the dimethyl ether liquefied gas with low heat value is converted under the action of the catalyst, so the effective heat value of dimethyl ether is improved, that is equal to improve the heat value of dimethyl ether, and purposes of saving money and energy are reached.

Description

【Technical field】 [0001] The invention relates to a combustion method after gas conversion, in particular to a method for direct industrial combustion of dimethyl ether into hydrogen-based gas. 【Background technique】 [0002] As a cheap fuel, dimethyl ether has oxygen content, low carbon chain, sufficient and safe combustion, no carbon loss in the combustion process, no black smoke, no residual liquid, and combustion tail gas meets national standards, so dimethyl ether has been used as a fuel It is widely used, but the combustion calorific value of dimethyl ether is about 29000KJ / KG-31450KJ / KG, compared with the combustion calorific value of LPC liquefied petroleum gas 46000KJ / KG, it reaches 0.63 of LPC liquefied petroleum gas, so in proportion Calculation, with the calorific value produced by 1 kg of liquefied petroleum gas, it is necessary to use the calorific value of 1.58 kg of dimethyl ether as a comparison, so there is no practical value in economical proportion calcul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/22
CPCY02P20/10
Inventor 杜伟良
Owner 纪福光