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Process method for producing liquefied ammonia from carbonization furnace gas and co-producing liquefied natural gas

A technology of liquefied natural gas and a process method, which is applied in the field of co-production of liquefied natural gas from carbonization furnace gas to liquid ammonia, can solve the problems of low utilization rate of carbonization furnace gas, and achieve the effects of realizing clean production, improving utilization rate and enriching product industry chain.

Active Publication Date: 2016-04-13
榆林科大高新能源研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a process method for producing liquefied ammonia from carbonization furnace gas and co-producing liquefied natural gas. Through this process method, the technical problem of low utilization rate of carbonization furnace gas can be effectively solved by enterprises, and the added value of products can be improved.

Method used

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  • Process method for producing liquefied ammonia from carbonization furnace gas and co-producing liquefied natural gas
  • Process method for producing liquefied ammonia from carbonization furnace gas and co-producing liquefied natural gas
  • Process method for producing liquefied ammonia from carbonization furnace gas and co-producing liquefied natural gas

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Embodiment 1

[0063] The main composition of the raw material carbonization furnace gas in this embodiment is specifically shown in the following table: (gas volume 40000Nm 3 / h, temperature 40℃)

[0064]

[0065] The gas also contains impurities such as coal tar, dust particles, sulfide and moisture. The sulfides include hydrogen sulfide, sulfur dioxide, carbon dioxide, methyl mercaptan, and thiophene.

[0066] Step 1: Filter:

[0067] Pass the carbonization furnace gas through the filter to remove non-gas impurities in the gas, and initially purify the carbonization furnace gas;

[0068] Coke is filled in the filter, wire mesh is installed at the filter outlet, and a separation space is left at the bottom, and the airflow flows out of the filter from bottom to top.

[0069] Step 2: Compression:

[0070] A reciprocating compressor is used to compress the carbonization furnace gas to 0.01Mpa.

[0071] Step 3: Deoxygenation:

[0072] Using a deoxidation catalyst (Fe / Al 2 o 3 , wit...

Embodiment 2

[0088] The main composition of the raw material carbonization furnace gas in this embodiment is specifically shown in the following table: (gas volume 40000Nm 3 / h, temperature 40℃)

[0089]

[0090] The gas also contains impurities such as coal tar, dust particles, sulfide and moisture. The sulfides include hydrogen sulfide, sulfur dioxide, carbon dioxide, methyl mercaptan, and thiophene.

[0091] Step 1: Filter:

[0092] Pass the carbonization furnace gas through the filter to remove non-gas impurities in the gas, and initially purify the carbonization furnace gas;

[0093] Coke is filled in the filter, wire mesh is installed at the filter outlet, and a separation space is left at the bottom, and the airflow flows out of the filter from bottom to top.

[0094] Step 2: Compression:

[0095] A reciprocating compressor is used to compress the carbonization furnace gas to 2.5Mpa.

[0096] Step 3: Deoxygenation:

[0097] Using deoxidation catalyst (Fe-Mo / Al 2 o 3 , wit...

Embodiment 3

[0113] The main composition of the raw material carbonization furnace gas in this embodiment is specifically shown in the following table: (gas volume 40000Nm 3 / h, temperature 40℃)

[0114]

[0115] The gas also contains impurities such as coal tar, dust particles, sulfide and moisture. The sulfides include hydrogen sulfide, sulfur dioxide, carbon dioxide, methyl mercaptan, and thiophene.

[0116] Step 1: Filter:

[0117] Pass the carbonization furnace gas through the filter to remove non-gas impurities in the gas, and initially purify the carbonization furnace gas;

[0118] Activated carbon is filled in the filter, wire mesh is installed at the filter outlet, and a separation space is left at the bottom, and the airflow flows out of the filter from bottom to top.

[0119] Step 2: Compression:

[0120] A centrifugal compressor is used to compress the carbonization furnace gas to 5.0Mpa.

[0121] Step 3: Deoxygenation:

[0122] Using deoxidation catalyst (Co-Mo / Al 2 ...

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Abstract

The invention relates to a process method for co-production of a liquid ammonia and liquefied natural gas by using a carbonized furnace gas. At present, utilization of the carbonized furnace gas is not enough in enterprises, thereby causing harm to the environment and violating environment-friendly meanings of energy conservation and emission reduction. The process method comprises the steps of subjecting the carbonized furnace gas to filtration, compression and deoxidation so as to separate nitrogen from the carbonized furnace gas; synthesizing ammonia in an ammonia converter after being pressurized with hydrogen and furture obtaining the liquid ammonia; then regulating a volume ratio of hydrogen to carbon monoxide by adopting a wide temperature and sulfur-resistant transformation process; converting organic sulfur into hydrogen sulfide; then carrying out desulfuration and decarbonization treatment; carrying out a multi-stage methanation reaction to obtain a gas mixture with methane as a main component; removing water and carbon dioxide by using molecular sieve; and liquefying to obtain methane with a purity of higher than 99.5%. The process method prepares the liquefied natural gas by using carbon monoxide and hydrogen in the carbonized furnace gas and co-produces liquid ammonia by using nitrogen in the carbonized furnace gas, so that useful components in the carbonized furnace gas of enterprises can be utilized reasonably.

Description

technical field [0001] The invention belongs to the technical field of natural gas production, and in particular relates to a process method for producing liquefied ammonia from gas in a carbonization furnace and co-producing liquefied natural gas. Background technique [0002] Carbonization furnace gas is a hydrocarbon-rich gas produced during the production of semi-coke through dry distillation in the carbonization furnace using high-quality Jurassic non-caking coal and weakly caking coal as raw materials. When using carbonization furnace to produce semi-coke, every ton of semi-coke produced can get 400-500Nm except carbonization furnace recycling and semi-coke drying. 3 carbonization furnace gas, the calorific value of the gas is 7500kJ / Nm 3 . As of 2013, the country produced a total of about 70 million tons of semi-coke, including 40 million tons in Shaanxi, 20 million tons in Xinjiang, 10 million tons in Inner Mongolia and Ningxia, and the carbonization furnace gas ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08C10L3/10C01C1/04C10K1/00C10K1/34C10K1/08C10K1/32C10K1/02C10K3/00
Inventor 董永波王新明高航郭海洋
Owner 榆林科大高新能源研究院有限公司