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Technique of utilizing gasified coal gas and coke oven gas to co-produce liquefied natural gas, methanol and liquid ammonia

A technology of liquefied natural gas and coke oven gas, which is applied in the field of coal chemical industry, can solve the problems that components cannot be fully utilized, can only be used as fuel, and poor adjustability, etc., to achieve maximum utilization, ensure feasibility, and ensure purity Effect

Active Publication Date: 2016-08-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If only a single technology is used to produce a certain product, some components will not be fully utilized, and the tail gas containing some hydrogen needs to find another way or can only be used as fuel
In addition, the production of a single product faces greater market risk and poor adjustability

Method used

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  • Technique of utilizing gasified coal gas and coke oven gas to co-produce liquefied natural gas, methanol and liquid ammonia
  • Technique of utilizing gasified coal gas and coke oven gas to co-produce liquefied natural gas, methanol and liquid ammonia
  • Technique of utilizing gasified coal gas and coke oven gas to co-produce liquefied natural gas, methanol and liquid ammonia

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Embodiment

[0081] The composition of typical coke oven gas is shown in Table 1, the pressure is 1-5kPa(G), the temperature is about 40°C, and the flow rate is 34000Nm3 / h.

[0082] Table 1 Volume composition of coke oven gas

[0083] H2

CO

CO2

CH4

cHm

N2

53.82

10.74

4.68

22.57

3.15

4.63

O2

H2S

total

tar and dust

water vapor

0.41

trace

100

trace

saturation

[0084] Such as figure 1 In the process shown, the coke oven gas is first sent to the gas tank for buffering, and after the pressure is stabilized, the compressor is used to pressurize it to about 2.0MPa for hydrogenation and conversion treatment, and then the second step-up is carried out to 2.8MPa, and then sent to MDEA for desulfurization and desulfurization The carbon plant is purified, and then sent to the drying device to remove moisture, and then sent to the cryogenic liquefaction separation device for deep separation, and e...

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Abstract

The invention provides a technique of utilizing gasified coal gas and coke oven gas to co-produce liquefied natural gas, methanol and liquid ammonia. The coke oven gas is utilized to co-produce liquefied natural gas, methanol and liquid ammonia. Preparation of LNG (liquefied natural gas) through the coke oven gas, preparation of methanol through the coke oven gas, ammonium synthesis, cryogenic liquefying separation and liquid ammonia washing are organically related through reasonable arrangement, methane in the coke oven gas is utilized to produce the LNG, hydrogen and carbon monoxide in the coke oven gas are utilized to produce methanol, and hydrogen and nitrogen in the coke oven gas are utilized to produce liquid ammonia. Existing techniques are utilized comprehensively, and maximum utilization of the coke oven gas is realized without thoroughly separating all components of the coke oven gas, so that operation cost is lowered greatly.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a process method for co-producing liquefied natural gas, methanol and liquid ammonia by utilizing gasification coal gas and coke oven gas. Background technique [0002] Coke oven gas, also known as coke oven gas, refers to a combustible gas produced while coke and tar products are produced after coking coal is subjected to high-temperature dry distillation in a coke oven. It is a by-product of the coking industry. Coke oven gas has a high calorific value and is usually used as fuel for high-temperature industrial furnaces or city gas. [0003] With the gradual improvement of environmental protection requirements, the new coking industry access standard has clearly stipulated that the utilization rate of coke oven gas should exceed 98%. Therefore, many coke oven gas utilization technologies have been developed, such as coke oven gas to liquefied natural gas, coke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08C07C29/151C01B3/50
CPCC01B3/50C01B2203/0415C01B2203/042C01B2203/046C01B2203/0475C01B2203/048C01B2203/0485C01B2203/0495C07C29/1518C10L3/08C07C31/04
Inventor 任小坤李保平杨跃平唐守胜张武
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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