High-temperature dechlorinating agent and preparing method thereof

Abstract

The invention relates to a high-temperature dechlorination agent, which consists of 0 to 42 wt percent of CaOH, 18 to 70 wt percent of CaO, 20 to 40 wt percent of hydrotalcite, 7 to 17 wt percent of clay and 0 to 7 wt percent of adhesive. Based on the high-temperature dechlorination agent, the invention further discloses a preparation method of the high-temperature dechlorination agent. The high-temperature dechlorination agent prepared by the preparation method can be applied to a coal gasification fuel cell (MCFC) system, a coal gasification combination circulation power generation (IGCC) system and catalytic reforming regeneration gas so as to remove the HCl; furthermore, the dechlorination agent has high chlorine content and good dechlorination effect.

Description

technical field

[0001] The invention relates to a dechlorination agent for removing hydrogen chloride at relatively high temperature, belonging to the technical field of gas purification. Background technique

[0002] In the raw material gas or other gaseous materials in the production process of petrochemical and chemical fertilizer industries, there are often more or less residual hydrogen chloride gas. Hydrogen chloride gas is an acidic corrosive gas, which has a strong corrosive effect on production equipment, and can easily cause cave-shaped spots on production equipment, seriously affecting the safety of industrial production; The high-efficiency catalysts used in production have side effects, which can easily lead to catalyst poisoning and deactivation, thus directly affecting the above-mentioned normal industrial production. In addition, in the petrochemical industry, residual hydrogen chloride (converted from residual organic chlorine in the oxygen chlorination pro...

Examples

Embodiment 1

[0014] Weigh 28 kg of calcium hydroxide, 18 kg of calcium oxide, 32 kg of hydrotalcite, 17 kg of kaolin, and 5 kg of sodium silicate, grind the above materials to more than 200 mesh, and fully mix the above ground materials ;Put the ground and mixed powder into the rolling ball machine, and spray an appropriate amount of water to form it while rolling. When the particle size of the rolling ball reaches Φ3-5mm, take out the spherical particles; put the above spherical particles in Stand at room temperature for 10 hours; then, dry the cured spherical particles at 100°C, and then roast at 550°C for 3 hours to obtain the dechlorination agent of the present invention.

[0015] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 650°C. The dechlorination agent can reduce the hydrogen chloride content of the outlet g...

Embodiment 2

[0017] Weigh 20 kg of calcium hydroxide, 30 kg of calcium oxide, 40 kg of hydrotalcite, 6 kg of kaolin, 1 kg of sheep liver soil, and 3 kg of sodium silicate, and grind the above materials to more than 200 mesh respectively, and grind the above The finished materials are fully mixed; put the above ground and mixed powder into the rolling ball machine, spray an appropriate amount of water while rolling to form, when the particle size of the rolling ball reaches Φ3 ~ 5mm, take out the spherical particles The above-mentioned spherical particles are kept at room temperature for 10 hours; after that, the spherical particles after curing are dried at 100°C, and then roasted at 560°C for 3 hours to obtain the dechlorination agent of the present invention.

[0018] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 6...

Embodiment 3

[0020] Weigh 25 kg of calcium hydroxide, 25 kg of calcium oxide, 40 kg of hydrotalcite, 3 kg of attapulgite clay, and 7 kg of sodium silicate, grind the above materials to more than 200 mesh respectively, and carry out Mix well; put the ground and mixed powder into the rolling ball machine, spray appropriate amount of water to form it while rolling, when the particle size of the rolling ball reaches Φ3~5mm, take out the spherical particles; put the above spherical The granules are kept at room temperature for 15 hours; after that, the cured spherical granules are dried at 110°C, and then roasted at 570°C for 4 hours to obtain the dechlorination agent of the present invention.

[0021] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 650°C. The dechlorination agent can reduce the hydrogen chloride content of...

technical field

[0001] The invention relates to a dechlorination agent for removing hydrogen chloride at relatively high temperature, belonging to the technical field of gas purification. Background technique

[0002] In the raw material gas or other gaseous materials in the production process of petrochemical and chemical fertilizer industries, there are often more or less residual hydrogen chloride gas. Hydrogen chloride gas is an acidic corrosive gas, which has a strong corrosive effect on production equipment, and can easily cause cave-shaped spots on production equipment, seriously affecting the safety of industrial production; The high-efficiency catalysts used in production have side effects, which can easily lead to catalyst poisoning and deactivation, thus directly affecting the above-mentioned normal industrial production. In addition, in the petrochemical industry, residual hydrogen chloride (converted from residual organic chlorine in the oxygen chlorination pro...

Examples

Embodiment 1

[0014] Weigh 28 kg of calcium hydroxide, 18 kg of calcium oxide, 32 kg of hydrotalcite, 17 kg of kaolin, and 5 kg of sodium silicate, grind the above materials to more than 200 mesh, and fully mix the above ground materials ;Put the ground and mixed powder into the rolling ball machine, and spray an appropriate amount of water to form it while rolling. When the particle size of the rolling ball reaches Φ3-5mm, take out the spherical particles; put the above spherical particles in Stand at room temperature for 10 hours; then, dry the cured spherical particles at 100°C, and then roast at 550°C for 3 hours to obtain the dechlorination agent of the present invention.

[0015] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 650°C. The dechlorination agent can reduce the hydrogen chloride content of the outlet g...

Embodiment 2

[0017] Weigh 20 kg of calcium hydroxide, 30 kg of calcium oxide, 40 kg of hydrotalcite, 6 kg of kaolin, 1 kg of sheep liver soil, and 3 kg of sodium silicate, and grind the above materials to more than 200 mesh respectively, and grind the above The finished materials are fully mixed; put the above ground and mixed powder into the rolling ball machine, spray an appropriate amount of water while rolling to form, when the particle size of the rolling ball reaches Φ3 ~ 5mm, take out the spherical particles The above-mentioned spherical particles are kept at room temperature for 10 hours; after that, the spherical particles after curing are dried at 100°C, and then roasted at 560°C for 3 hours to obtain the dechlorination agent of the present invention.

[0018] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 6...

Embodiment 3

[0020] Weigh 25 kg of calcium hydroxide, 25 kg of calcium oxide, 40 kg of hydrotalcite, 3 kg of attapulgite clay, and 7 kg of sodium silicate, grind the above materials to more than 200 mesh respectively, and carry out Mix well; put the ground and mixed powder into the rolling ball machine, spray appropriate amount of water to form it while rolling, when the particle size of the rolling ball reaches Φ3~5mm, take out the spherical particles; put the above spherical The granules are kept at room temperature for 15 hours; after that, the cured spherical granules are dried at 110°C, and then roasted at 570°C for 4 hours to obtain the dechlorination agent of the present invention.

[0021] The prepared dechlorination agent is subjected to a dechlorination test. The dechlorination reaction conditions are: the raw gas contains 2000-3000PPm (volume fraction) of hydrogen chloride, and the reaction temperature is 650°C. The dechlorination agent can reduce the hydrogen chloride content of...