Process of preparing synthetic natural gas by using yellow phosphorus tail gas

A yellow phosphorus tail gas and process technology, applied in the petroleum industry, gas fuel, fuel, etc., can solve the problems that the yellow phosphorus tail gas purification method has not been proposed and cannot meet the second-level natural gas standard, and achieve high reliability, stable operation, The effect of high heat utilization rate

Active Publication Date: 2014-10-08
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the concentration of synthetic natural gas can only reach 80%, which is not up to the national secondary natural gas standard
At the same time, no specific purification method for yellow phosphorus tail gas was proposed

Method used

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  • Process of preparing synthetic natural gas by using yellow phosphorus tail gas
  • Process of preparing synthetic natural gas by using yellow phosphorus tail gas
  • Process of preparing synthetic natural gas by using yellow phosphorus tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Table 1 Yellow phosphorus tail gas components

[0048] Element Volume fraction / % Element Mass concentration / mg·m -3 O 2 0.5 PH3 2550 CO 85 h 2 S 10050 H 2 5.0 HF 610 N 2 4.0 SO 2 29 CO 2 4.0 CS 2 18 CH 4 0.5 COS 315

[0049] Gas flow 10000Nm 3 / h

[0050] The yellow phosphorus tail gas from the yellow phosphorus plant is pressurized to 50kPa by the blower and then enters the pre-purification system composed of two towers to remove viscous impurities such as tar in the yellow phosphorus tail gas.

[0051] The pre-purified yellow phosphorus tail gas enters the bottom of two series-connected desulfurization towers in turn, and the desulfurization solution enters from the upper part of the tower, sprays the yellow phosphorus tail gas from top to bottom, absorbs hydrogen sulfide in the yellow phosphorus tail gas, and removes the yellow phosphorus from hydrogen sulfide The tail gas enters the co...

Embodiment 2

[0070] Table 3 Yellow phosphorus tail gas components

[0071] Element Volume fraction / % Element Mass concentration / mg·m 3 O 2 0.2 pH 3 1550 CO 95 h 2 S 8050 H 2 2.0 HF 1010 N 2 1.0 SO 2 56 CO 2 1.0 CS 2 120 CH 4 0.8 COS 115

[0072] Gas flow 20000Nm 3 / h

[0073] The yellow phosphorus tail gas from the yellow phosphorus plant is pressurized to 70kPa by the blower and then enters the pre-purification system composed of two towers to remove viscous impurities such as tar in the yellow phosphorus tail gas.

[0074] The pre-purified yellow phosphorus tail gas enters the bottom of two series-connected desulfurization towers in turn, and the desulfurization solution enters from the upper part of the tower, sprays the yellow phosphorus tail gas from top to bottom, absorbs hydrogen sulfide in the yellow phosphorus tail gas, and removes the yellow phosphorus from hydrogen sulfide The tail gas enters the ...

Embodiment 3

[0093] Table 5 Yellow phosphorus tail gas components

[0094] Element Volume fraction / % Element Mass concentration / mg·m 3 O 2 0.8 pH 3 340 CO 90 h 2 S 12120 H 2 3.5 HF 460 N 2 3.0 SO 2 25 CO 2 2.5 CS 2 310 CH 4 0.2 COS 78

[0095] Gas flow 50000Nm 3 / h

[0096] The yellow phosphorus tail gas from the yellow phosphorus plant is pressurized to 60kPa by the blower and then enters the pre-purification system consisting of two towers to remove viscous impurities such as tar in the yellow phosphorus tail gas.

[0097] The pre-purified yellow phosphorus tail gas enters the bottom of two series-connected desulfurization towers in turn, and the desulfurization solution enters from the upper part of the tower, sprays the yellow phosphorus tail gas from top to bottom, absorbs hydrogen sulfide in the yellow phosphorus tail gas, and removes the yellow phosphorus from hydrogen sulfide The tail gas enters the ...

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Abstract

The invention belongs to the field of resource recycling of industrial tail gases and particularly relates to a process of preparing synthetic natural gas by using yellow phosphorus tail gas. The process comprises the following steps: carrying out blowing and pressurization, pre-cleaning, desulfuration, pickling by concentrated sulfuric acid, alkali neutralization, pressurization, temperature swing adsorption purification, dearsenification, defluorination, deoxygenation, CO conversion, cooling and drying, decarbonization, superfine purification, methanation and cooling and drying on raw material yellow phosphorus tail gas, and thus finally preparing a natural gas product. The process provided by the invention is a yellow phosphorus tail gas purifying and synthetic natural gas preparing packaged technology suitable for industrial scale application and can prepare high purity methane gas by taking the yellow phosphorus tail gas containing various impurities as fuel gases or chemical materials for users to use.

Description

technical field [0001] The invention belongs to the field of resource recovery and utilization of industrial tail gas, and specifically relates to a process for producing synthetic natural gas by using yellow phosphorus tail gas. Background technique [0002] my country is the world's largest producer of yellow phosphorus, with an annual production capacity of more than 2 million tons and an output of more than 1 million tons, accounting for more than 80% of the world's total. The production of yellow phosphorus usually adopts the electric furnace method, and the by-product tail gas of 1 ton of yellow phosphorus is 2800-3000 cubic meters (Zhang Yikun, "Current Status and Prospect of Yellow Phosphorus Tail Gas Recovery and Utilization", Chemical Machinery, 2012, 39(4)). The main component in the tail gas is CO, and other impurities include inorganic sulfur (H 2 S, S, SO 2 ), organic sulfur (CH 4 SH, COS), SiF 4 、PH 3 , AsH 3 ,P 4 , HF, CH 4 , CO 2 , O 2 , N 2 , cya...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/08
Inventor 陈耀壮赖崇伟谭平华毛震波熊国炎王磊李洁赵国强
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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