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Method for natural gas desulphurization and resource utilization of desulphurization waste solution

A technology for desulfurization waste liquid and natural gas, applied in chemical instruments and methods, alkali metal sulfide/polysulfide, gaseous discharge wastewater treatment, etc., can solve problems such as environmental pollution, achieve significant environmental benefits, high added value, Significant economic effect

Inactive Publication Date: 2012-10-03
赵志军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a method for resource utilization of natural gas desulfurization and desulfurization waste liquid. The purpose is to abandon the traditional Claus method, but to find a new way to completely solve the problem of environmental pollution caused by natural gas desulfurization treatment, and to Fully recover the available resources in order to achieve a significant improvement in environmental and economic benefits

Method used

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  • Method for natural gas desulphurization and resource utilization of desulphurization waste solution

Examples

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Effect test

Embodiment 1

[0040] 1. Prepare sodium hydroxide absorption solution, the volume is 1 liter; the mass percentage concentration is 5%;

[0041] 2. Prepare sodium hydroxide solution, the volume is 1 liter; the mass percentage concentration is 10%;

[0042] 3. Prepare barium sulfide solution, the volume is 1 liter; the mass percentage concentration is 15%;

[0043] 4. Mix 1 liter of sodium hydroxide absorption solution with H 2 The content of S is 1%, CO 2The content is 1000 liters of natural gas of 4.5% to carry out gas-liquid reaction, when the pH=12 of recording absorption liquid, stop reaction; Add above-mentioned 10% concentration sodium hydroxide solution 0.5 liters in absorption liquid, record the pH=12 of absorption liquid 14; Then when the absorption solution is heated to 80°C, add 1 liter of the above-mentioned 15% barium sulfide solution, and a white precipitate is precipitated in the reaction; carry out solid-liquid separation; wash, suction filter, and dry the white precipitate ...

Embodiment 2

[0045] 1. Prepare sodium carbonate absorption solution, the volume is 2 liters; the mass percentage concentration is 8%;

[0046] 2. Prepare sodium hydroxide solution, the volume is 1 liter; the mass percentage concentration is 10%;

[0047] 3. Prepare a barium sulfide solution with a volume of 3 liters; a mass percentage concentration of 15%;

[0048] 4. Mix 1.6 liters of sodium hydroxide absorption solution with H 2 The content of S is 1%, CO 2 The content is 1000 liters of natural gas of 4.5% to carry out gas-liquid reaction, when the pH=12 of recording absorption liquid, stop reaction; Add above-mentioned 1 liter of sodium hydroxide solution of 10% concentration in absorption liquid, record the pH=12 of absorption liquid 14; Then, when the absorption liquid was heated to 80°C, 2.2 liters of the above-mentioned 15% barium sulfide solution was added, and a white precipitate was precipitated during the reaction; solid-liquid separation was carried out; washing, suction filt...

Embodiment 3

[0050] 1. Prepare sodium hydroxide absorption solution, the volume is 2 liters; the mass percentage concentration is 3%;

[0051] 2. Prepare a sodium hydroxide solution with a volume of 0.5 liters; a mass percentage concentration of 8%;

[0052] 3. Prepare a barium sulfide solution with a volume of 1 liter; a mass percentage concentration of 10%;

[0053] 4. Mix 1.45 liters of sodium hydroxide absorption solution with H 2 The content of S is 1.5%, CO 2 The content is 3% natural gas 1000 liters to carry out gas-liquid reaction, when the pH=11 of recording absorption liquid, stop reaction; Add above-mentioned 8% sodium hydroxide solution 0.5 liters in absorption liquid, record the pH=11 of absorption liquid 14; Then, when the absorption liquid is heated to 75°C, add 1 liter of barium sulfide with a concentration of 10% above to dissolve 1 liter, and a white precipitate is precipitated in the reaction; carry out solid-liquid separation; wash, filter, and dry the white precipita...

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Abstract

The invention provides a method for natural gas desulphurization and resource utilization of desulphurization waste solution. The method comprises the following steps: determining liquid sodium hydroxide or sodium carbonate as absorption liquid for natural gas to absorb H2S and CO2 in the natural gas, ensuring that the absorption reaction reaches an end point by adjusting the pH value, converting the absorption liquid into absorption liquid of a sodium sulfhydrate or sodium bicarbonate system, adding sodium hydroxide solution, further converting the absorption liquid into the absorption liquid of the sodium sulfide and sodium carbonate system, then adding liquid barium sulfide, and extracting industrial products barium carbonate and sodium sulfide after reaction. The method is totally different from the conventional desulphurization technology, realizes clean production without three-waste pollutant discharged in the whole technological process, simply and thoroughly solves the problem that the existing natural gas desulphurization method pollutes the environment, and simultaneously improves the labor productivity, reduces the energy consumption, and has high added value in obtained resource products, simple process flow and obvious environmental and economic benefits.

Description

technical field [0001] The invention relates to natural gas purification technology, in particular to natural gas desulfurization, decarbonization, and clean treatment process of waste liquid produced, and in particular to a method for resource utilization of natural gas desulfurization and desulfurization waste liquid. Background technique [0002] Natural gas is the most clean, efficient and convenient combustible energy. Rational use of natural gas and sufficient purification of natural gas can optimize the energy consumption structure, improve the atmospheric environment, and achieve the goal of energy conservation and emission reduction, which is of great significance to the construction of an environment-friendly society. Natural gas includes clean gas that does not contain or contain trace amounts of sulfides and carbon dioxide, and can be exported and directly utilized without purification; it also includes gases that contain significant amounts of sulfides and carbo...

Claims

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Application Information

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IPC IPC(8): C10L3/10C02F1/00C01F11/18C01B17/22C02F103/18
Inventor 赵志军
Owner 赵志军
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