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Water-saving type compressed natural gas production system and production method thereof

A technology for compressing natural gas and production systems, which is applied in the fields of gas fuel, granular/powder fuel gasification, petroleum industry, etc., can solve the problems of insufficient realization of the value of hydrocarbon elements, and achieve high system production intensity, high yield, The effect of less investment

Inactive Publication Date: 2014-11-19
BEIJING CHUANGSHI ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of using coke oven gas as fuel is that its calorific value is utilized, and the value of hydrocarbon elements is not fully realized (for example, 25%-30% of methane and more than 56% of H 2 )
In addition, since coke oven gas contains a large amount of H 2 , it is difficult to be liquefied, which makes coke oven gas not like liquefied natural gas, which can be used in tanks or transported away from pipelines, but is only suitable for nearby use in the form of pipeline transportation

Method used

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  • Water-saving type compressed natural gas production system and production method thereof
  • Water-saving type compressed natural gas production system and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Coal and air enter the first fixed-bed gasifier for gasification to produce the first crude synthesis gas, and the generated first crude synthesis gas enters the purification unit to remove solid particles and sulfur in the synthesis gas, and then all are sent to the coke oven The unit is used as fuel to replace coke oven gas. In addition, coal and pure oxygen enter the second fixed-bed gasifier for gasification to produce the second crude synthesis gas. After the second crude synthesis gas is purified by the second purification unit, it is mixed with the replaced coke oven gas and then compressed. The unit is further compressed. The compressed mixed gas enters the fine desulfurization unit for desulfurization. The finely desulfurized gas enters the methanation unit for methanation to generate methane, and the generated methane is further purified by mercury removal and drying units to obtain the product compressed natural gas.

Embodiment 2

[0053] Coke powder and oxygen enter the fluidized bed gasifier for gasification to produce crude synthesis gas, and the generated crude synthesis gas enters the purification unit to remove solid particles and sulfur in the synthesis gas, and 85% by volume of the purified synthesis gas passes to the coke The furnace unit is used as fuel to replace the coke oven gas, and the remaining 15% by volume is mixed with the replaced coke oven gas and enters the compression unit for further compression. The compressed mixed gas enters the fine desulfurization unit for desulfurization. The finely desulfurized gas enters the methanation unit for methanation to generate methane, and the generated methane is further purified by mercury removal and drying units to obtain compressed natural gas, which is further liquefied to produce liquefied natural gas.

Embodiment 3

[0055] Petroleum coke and gas with an oxygen content of 80% by volume (the rest is nitrogen) enter the first entrained entrained gasifier for gasification to produce the first crude synthesis gas, and the generated first crude synthesis gas enters the first purification unit for desynthesis The solid particles and sulfur in the gas are then all passed to the coke oven unit to be used as fuel to replace the coke oven gas. In addition, petroleum coke and pure oxygen enter the second fixed-bed gasifier for gasification to produce the second crude synthesis gas. After the second crude synthesis gas is purified by the second purification unit, it is mixed with the replaced coke oven gas and then enters the The compression unit further compresses. The compressed mixed gas enters the fine desulfurization unit for desulfurization. The finely desulfurized gas enters the methanation unit for methanation to generate methane, and the generated methane is further purified through mercury ...

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Abstract

The invention discloses a water-saving type compressed natural gas production system, which comprises a carbonaceous substance gasification unit 1, wherein the outlet of the carbonaceous substance gasification unit 1 is communicated to a purifying unit 2, the outlet pipeline of the purifying unit 2 is divided into two branch pipes, the first branch pipe is communicated to a combustion chamber of a coke oven unit 3, the second branch pipe and the coke oven gas outlet pipe of the coke oven unit 3 are combined and then communicated to a compression unit 4, and a fine desulfurization unit 5, a methanation unit 6 and a demercuration-drying unit 7 are arranged at downstream of the compression unit 4 in order. The invention also discloses a water-saving type compressed natural gas production method by using the above system. The system and method of the present invention can effectively use the carbonaceous substance generated in a coking process, superfluous hydrogen in coke oven gas can be fully used, coke oven gas consumption for producing per unit of liquefied natural gas can be greatly reduced through gas distribution, yield of liquefied natural gas can be increased by more than 30% under same consumption of coke oven gas, and the usage amount of water can be greatly reduced by the system.

Description

technical field [0001] The invention belongs to the technical field of natural gas production. technical background [0002] Liquefied natural gas is an important energy product, the main component is methane, and is recognized as the cleanest energy on earth. Colorless, odorless, non-toxic and non-corrosive, its volume is about 1 / 625 of the volume of the same volume of gaseous natural gas, and the weight of liquefied natural gas is only about 45% of the same volume of water. The manufacturing process is to first purify the natural gas produced in the gas field, and then transport it by liquefied natural gas ship after a series of ultra-low temperature liquefaction. The burning of liquefied natural gas causes very little air pollution and releases a lot of heat, so liquefied natural gas is a relatively advanced energy source. [0003] On the other hand, the central and eastern regions of my country are also facing serious air pollution problems such as nitrogen oxides, sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08C10J3/56
Inventor 崔宇刘森焦云帆
Owner BEIJING CHUANGSHI ENERGY TECH CO LTD
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