CO gas preparation process

Abstract

The invention provides a CO gas preparation process. The CO gas preparation process mainly comprises the following steps: (1) preparing a raw gas from coke, CO2 and oxygen in a gas making furnace, recovering heat of the raw gas, and removing tar, dust impurities and strong acid ingredients; (2) maintaining or heating a process gas to 30-80 DEG C, removing majority of sulfide in a hydrolysis desulfurizing tower, wherein an organic sulfur hydrolyzing agent and an H2S oxidation desulfurizing agent are mixed or laminated in the tower; (3) separating CO2 from the process gas, removing the rest majority of sulfide at the same time to prepare the CO gas, and enabling the separated sulfur-containing CO2-rich gas to go back to the gas making furnace for recycling. The hydrolysis desulfurizing tower is provided with a vertical sleeve heating structure, a hydrolyzing agent-desulfurizing agent bed layer is arranged between sleeves; the hydrolysis desulfurizing tower melts, gasifies and blows out the captured elemental sulfur when the heat is regenerated at the temperature of 200-300 DEG C, and the elemental sulfur is collected by a regeneration condenser to obtain sulfur. The desulfurizing process of the process is simple and reliable, is easy to control, is large in elasticity of processing capacity, is strongly adaptive to high and low contents and fluctuation of H2S and COS, is safe and environment-friendly, and is low in operation cost.

Description

technical field

[0001] The invention relates to a CO gas refining process, in particular to a process for preparing CO gas. Background technique

[0002] In metal smelting and organic synthesis, such as preparing reduced iron powder from iron oxide, sodium formate synthesis, and methanol carbonylation to produce acetic acid, CO gas is often used as a reducing agent or reaction raw material, and high-purity CO gas needs to be prepared.

[0003] In the prior art, CO gas is mainly produced from coke, carbon dioxide and oxygen in a gas-making furnace. First, crude CO gas with a concentration of 65-70% is produced, and then refined and purified to obtain a high concentration of CO gas such as 97%-98%. Pure CO gas, namely carbon monoxide. The refining mainly includes coal tar removal, sulfides such as carbonyl sulfide (COS), H 2 The removal of S, the purification is mainly CO 2 removal, the refining process also involves organic matter and O 2 The removal of high-purity CO gas...

Examples

Embodiment

[0045] A side-line test device is established in the crude gas purification workshop, which mainly carries out the key step of removing sulfide in CO gas.

[0046] The crude gas comes from the gas production workshop, and is produced from coke, carbon dioxide and oxygen in the gas furnace. The by-product steam of the waste boiler is cooled down, and then further cooled to 30-40 ℃ by the circulating water heat exchanger, and the tar and dust impurities are removed by the electric tar remover, and the gas volume is 5000-6000Nm 3 / h, gauge pressure 10-15kPa; basic composition (volume content) of crude gas is CO 68%, CO 2 29%, O 2 0.20%, H 2 1.2%, H 2 S0.07%, COS0.16%, CS 2 0.003%, H 2 O 0.8%, and traces of HCl, HCN, NOx, SO 3 and AsH 3 , PH 3 .

[0047] The side line test device mainly includes a 50L protective agent tank, a heater, a 100L hydrolysis desulfurization tower, and a 50L regeneration condenser (water cooling, coil area 3m) connected in sequence along the airf...

technical field

[0001] The invention relates to a CO gas refining process, in particular to a process for preparing CO gas. Background technique

[0002] In metal smelting and organic synthesis, such as preparing reduced iron powder from iron oxide, sodium formate synthesis, and methanol carbonylation to produce acetic acid, CO gas is often used as a reducing agent or reaction raw material, and high-purity CO gas needs to be prepared.

[0003] In the prior art, CO gas is mainly produced from coke, carbon dioxide and oxygen in a gas-making furnace. First, crude CO gas with a concentration of 65-70% is produced, and then refined and purified to obtain a high concentration of CO gas such as 97%-98%. Pure CO gas, namely carbon monoxide. The refining mainly includes coal tar removal, sulfides such as carbonyl sulfide (COS), H 2 The removal of S, the purification is mainly CO 2 removal, the refining process also involves organic matter and O 2 The removal of high-purity CO gas...

Examples

Embodiment

[0045] A side-line test device is established in the crude gas purification workshop, which mainly carries out the key step of removing sulfide in CO gas.

[0046] The crude gas comes from the gas production workshop, and is produced from coke, carbon dioxide and oxygen in the gas furnace. The by-product steam of the waste boiler is cooled down, and then further cooled to 30-40 ℃ by the circulating water heat exchanger, and the tar and dust impurities are removed by the electric tar remover, and the gas volume is 5000-6000Nm 3 / h, gauge pressure 10-15kPa; basic composition (volume content) of crude gas is CO 68%, CO 2 29%, O 2 0.20%, H 2 1.2%, H 2 S0.07%, COS0.16%, CS 2 0.003%, H 2 O 0.8%, and traces of HCl, HCN, NOx, SO 3 and AsH 3 , PH 3 .

[0047] The side line test device mainly includes a 50L protective agent tank, a heater, a 100L hydrolysis desulfurization tower, and a 50L regeneration condenser (water cooling, coil area 3m) connected in sequence along the airf...

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