Process of producing natural gas substitute with dimethyl ether as material

A technology for replacing natural gas and dimethyl ether, which is applied in the field of urban gas production, can solve problems such as affecting the interests of users, greatly reducing the calorific value of products, and limited usage, achieving obvious economic and social benefits, making up for the lack of strategic reserves, The effect of good promotion and application prospects

Inactive Publication Date: 2007-03-21
罗东晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In the existing dimethyl ether utilization technology, DME is generally mixed with LPG and supplied in bottles as civil fuel. Although this technology is very mature, it has obvious disadvantages: DME can only be replaced at a relatively low ratio LPG, the use is limited; and the calorific value of the product is greatly reduced, which affects the interests of users; compared with imported LPG (bottled), the vapor pressure decreases and the gasification capacity is weakened

Method used

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  • Process of producing natural gas substitute with dimethyl ether as material
  • Process of producing natural gas substitute with dimethyl ether as material
  • Process of producing natural gas substitute with dimethyl ether as material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1. Dimethyl ether completely replaces liquefied petroleum gas to produce 10T natural gas

[0037] Take the production plant of Guangzhou Panyu Ganghua Gas Co., Ltd. as an example to illustrate.

[0038] (1) The original device of Township China Gas Co., Ltd. is a production device for LPG mixed with AIR to produce 10T generation natural gas. The process flow chart of the original LPG mixed air production device is shown in Figure 1 (LPG mixed air production process flow chart for 10T generation natural gas) , using imported LPG as raw material, the typical composition of LPG is (gas phase volume): C 3 40%, C 4 60%, the relevant parameters are shown in Table 2 below.

[0039]

project

propane

butane

high calorific value

lower calorific value

High Wobbe Index

Burning potential

gas density

(kg / Nm 3 )

MJ / Nm 3 (kcal / Nm 3 )

parameters

(volume%)

40

60

...

Embodiment 2

[0057] Example 2. Partial substitution of dimethyl ether for liquefied petroleum gas to produce 10T natural gas (DME and LPG are stored separately in liquid phase and mixed after gasification)

[0058] Also take the production plant of Guangzhou Panyu Ganghua Gas Co., Ltd. as an example for illustration.

[0059] ①After partial replacement of raw materials, the process flow and description of "DME+LPG" mixed air to produce 10T generation natural gas

[0060] The process flow chart of producing 10T generation natural gas after partially replacing LPG with DME is shown in Figure 3a ("DME+LPG" mixed air production process flow chart of 10T generation natural gas).

[0061] DME and LPG stored in high-pressure storage tanks are pressurized by their respective liquid-phase hydrocarbon pumps, and then enter their respective gasification devices to exchange heat with heating media (hot water, steam, electric heating, etc.) to be gasified, and then, These two kinds of gas are mixed wi...

Embodiment 3

[0075] Example 3. Partial substitution of dimethyl ether for liquefied petroleum gas to produce 10T generation natural gas (DME and LPG liquid phase mixed storage, simultaneous gasification method)

[0076] It also takes the production equipment of Guangzhou Panyu Ganghua Gas Co., Ltd. as an example for illustration.

[0077] Except for the raw material storage part, the process flow of the production system is exactly the same as that of "dme and LPG liquid phase storage and mixing after gasification", and the product quality and safety performance indicators are exactly the same. Accompanying drawing 3b is the technological flow chart of producing 10T generation natural gas by DME partially replacing LPG (under liquid state, mixed storage) mixed with air.

[0078] The DME and LPG mixed raw material stored in the high-pressure storage tank is pressurized by the liquid-phase hydrocarbon pump and enters the gasification device to exchange heat with the heat source to be gasifie...

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Abstract

The present invention is process of producing natural gas substitute with dimethyl ether as material, and the natural gas substitute produced with dimethyl ether as material may be used to replace available fuel gas partially or completely. The natural gas substitute has high burning rate, environment friendship, reasonable performance/cost ratio and other advantages. It may produced with available apparatus in fuel gas producing enterprise, and has excellent application foreground.

Description

technical field [0001] The invention relates to a method for producing town gas by using dimethyl ether instead of liquefied petroleum gas and other gas as raw materials. Background technique [0002] 1. National Energy Status [0003] Energy is the foundation of national economic development, and one of the three key issues worthy of attention in my country's economic development is the issue of energy structure. [0004] As a primary energy source, petroleum resources have only 40 years left in terms of the world's average recoverable reserves. Specifically, my country has changed from an oil exporter to an importer since 1993, and the shortage of oil is increasing year by year. In 2000, my country imported 70 million tons of crude oil and 30 million tons of refined oil products; by 2005, my country's crude oil production volume was 180 million tons, and imported crude oil was 130 million tons; in 2010, my country's oil import volume will reach 200 million tons, and its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 罗东晓
Owner 罗东晓
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