Preparation method for desulfurizing agent

Abstract

The invention discloses a preparation method for a desulfurizing agent. The preparation method for a desulfurizing agent comprises the following steps of: taking attapulgite as a raw material, and drying the raw material after alkali modification and activation treatments; grinding the raw material into powder, sieving, granulating and forming; then performing roasting activation; and finally sieving the powder into a spherical attapulgite desulfurizing agent finished product. The attapulgite desulfurizing agent obtained by the preparation method disclosed by the invention is good in alkali modification effect, rough and hard in the surfaces of spherical particles, not easy to break, large in specific surface area, high in porosity, good in adsorptive property for sulfur dioxide, easy to regenerate, simple in production process, low in cost, capable of being used for replacing active carbon (coke) to perform flue gas desulfurization, and greatly reducing the running cost of dry desulfurization, and also capable of being used for sewage treatment and other occasions.

Description

technical field

[0001] The invention relates to a method for activating and preparing a novel desulfurizing agent for flue gas dry desulfurization, in particular to a method for preparing a solid desulfurizing agent with attapulgite. Background technique

[0002] At present, the flue gas desulfurization technology is mainly based on the wet method. The common methods are limestone / lime-gypsum method, ammonia method, magnesium method and seawater method. The technology is mature and the efficiency is high, but there are high investment costs, large land occupation and water consumption. Large, easy to cause secondary pollution, equipment blockage, corrosion and other problems. The dry desulfurization process has the advantages of less water consumption, low operating cost, simple equipment, small footprint, and easy sulfur recovery, so it has become a promising flue gas purification technology. The activated carbon (coke) adsorption process is widely used in dry desulfurizat...

Examples

Embodiment Construction

[0016] 1. Select attapulgite with better adsorption performance, remove gravel and other sundries, and let it disintegrate into smaller irregular lumps after natural weathering for one month, and let it dry naturally to let its moisture less than 10%.

[0017] 2. Preliminarily crush and sieve the weathered and dried attapulgite to make the particle size less than 1mm.

[0018] 3. Taking the total weight of attapulgite, CaO and surfactant as 100%, add 25% of powdered CaO with a particle size of 150-200 mesh in the total weight percentage.

[0019] 4. With the total weight of attapulgite, CaO, and surfactant as 100%, add one or two of solid powdered alkylphenol polyoxyethylene ether and alkylbenzenesulfonic acid in a percentage of total weight of 2% Surfactant.

[0020] 5. The weight ratio of the total weight of attapulgite, CaO, and surfactant to water is 2:1, and water is added.

[0021] 6. Stir the above mixture evenly with a mixer, leave it to age for 24 hours, and carry ...

technical field

[0001] The invention relates to a method for activating and preparing a novel desulfurizing agent for flue gas dry desulfurization, in particular to a method for preparing a solid desulfurizing agent with attapulgite. Background technique

[0002] At present, the flue gas desulfurization technology is mainly based on the wet method. The common methods are limestone / lime-gypsum method, ammonia method, magnesium method and seawater method. The technology is mature and the efficiency is high, but there are high investment costs, large land occupation and water consumption. Large, easy to cause secondary pollution, equipment blockage, corrosion and other problems. The dry desulfurization process has the advantages of less water consumption, low operating cost, simple equipment, small footprint, and easy sulfur recovery, so it has become a promising flue gas purification technology. The activated carbon (coke) adsorption process is widely used in dry desulfurizat...

Examples

Embodiment Construction

[0016] 1. Select attapulgite with better adsorption performance, remove gravel and other sundries, and let it disintegrate into smaller irregular lumps after natural weathering for one month, and let it dry naturally to let its moisture less than 10%.

[0017] 2. Preliminarily crush and sieve the weathered and dried attapulgite to make the particle size less than 1mm.

[0018] 3. Taking the total weight of attapulgite, CaO and surfactant as 100%, add 25% of powdered CaO with a particle size of 150-200 mesh in the total weight percentage.

[0019] 4. With the total weight of attapulgite, CaO, and surfactant as 100%, add one or two of solid powdered alkylphenol polyoxyethylene ether and alkylbenzenesulfonic acid in a percentage of total weight of 2% Surfactant.

[0020] 5. The weight ratio of the total weight of attapulgite, CaO, and surfactant to water is 2:1, and water is added.

[0021] 6. Stir the above mixture evenly with a mixer, leave it to age for 24 hours, and carry ...