Multi-phase catalytic ozone oxidation catalyst and preparation method thereof

Abstract

The invention discloses a method for preparing a multi-phase catalytic ozone oxidation catalyst. The multi-phase catalytic ozone oxidation catalyst is formed by mixing the following components according to weight percentage: 61 to 64% of coal ash, 6 to 9% of metal oxide, 5 to 6% of cement, 5 to 6% of gypsum, 15 to 20% of lime, and aluminium powder which accounts for 0.06 to 0.07% of the total weight of the raw materials, wherein the coal ash is taken as aggregate, the metal oxide is taken as an active agent; the cement, the gypsum and the lime are taken as gelling agent; and the aluminium powder is taken as a foaming agent. The method comprises the following steps: mixing the raw materials into size and foaming the size to form a block; feeding the block to a still kettle; and consolidating the block at the temperature of 160 to 200 DEG C and the saturation pressure of more than 0.6MPa. The catalyst does not need high-temperature roasting, is short in process period, low in production cost, free of hidden danger, energy-saving, wide in source of raw materials and low in material cost, does not generate harmful gas and cause pollution to the environment, and can utilize the coal ash waste; and furthermore, the catalyst contains various active components and is wide in practicability, strong in applicability, available in a lot of waste water, long in service life, recyclable and free of secondary pollution.

Description

technical field

[0001] The invention relates to a catalyst, in particular to a heterogeneous catalytic ozone oxidation catalyst and a preparation method. Background technique

[0002] The traditional catalytic ozone oxidation method is to configure the catalyst into a solution of a certain concentration and add it to the wastewater. The catalyst exists in the wastewater in the form of ions, and then the ozone is passed into the homogeneous catalytic oxidation. Although the treatment effect can be improved, the presence of this catalyst It is difficult to recycle, the cost of the agent is high, and the introduced catalyst will cause secondary pollution, the utilization rate of ozone is also low, and the treatment effect is not good. Therefore, the application in wastewater treatment is largely limited. Therefore, how to use catalytic ozonation to carry out heterogeneous catalysis, improve the utilization rate of ozone, enhance the ability of ozone oxidation, and reduce the t...

Examples

Embodiment 1

[0018] Example 1, the fly ash is screened out of coarse particles and the water content is measured. The water content is required to be below 1%. Gypsum and lime are pulverized into fine powders less than 200 mesh, and iron oxide powder and copper oxide powder with a particle size of less than 400 mesh are selected. and manganese oxide powder; according to the batching ratio of each mold, 62% of fly ash, 6% of cement, 5% of gypsum, 20% of lime, 3% of iron oxide powder, 2% of copper oxide powder, 2% of manganese oxide powder and the above raw materials Add aluminum powder with a total weight of 0.06% into the batching tank, start the stirring device and add water to stir and mix to make a mixed slurry with a specific gravity of 1.72-1.73; pump the above mixed slurry into the foamed brick mold for 20 minutes; foam Finally, lay the adobe into a block of 240×200×600mm, then put the block into an autoclave, and consolidate it for 30 minutes at a temperature of 160°C and a saturatio...

Embodiment 2

[0019] Example 2, the fly ash is screened out of coarse particles and the water content is measured. The water content is required to be below 1%, and the gypsum and lime are pulverized into fine powders less than 200 mesh, and iron oxide powder and copper oxide powder with a particle size of less than 400 mesh are selected. and manganese oxide powder; according to the batching ratio of each mold, 64% of fly ash, 6% of cement, 6% of gypsum, 15% of lime, 3% of iron oxide powder, 3% of copper oxide powder, 3% of manganese oxide powder and the above-mentioned Add aluminum powder with a total weight of 0.07% of the raw materials into the batching tank, start the stirring device and add water to stir and mix to make a mixed slurry with a specific gravity of 1.71-1.72; pump the above mixed slurry into the foaming brick mold and foam for 20 minutes; After soaking, lay the bricks into a block of 240×200×600mm, then put the block into an autoclave, and consolidate it for 35 minutes at a...

technical field

[0001] The invention relates to a catalyst, in particular to a heterogeneous catalytic ozone oxidation catalyst and a preparation method. Background technique

[0002] The traditional catalytic ozone oxidation method is to configure the catalyst into a solution of a certain concentration and add it to the wastewater. The catalyst exists in the wastewater in the form of ions, and then the ozone is passed into the homogeneous catalytic oxidation. Although the treatment effect can be improved, the presence of this catalyst It is difficult to recycle, the cost of the agent is high, and the introduced catalyst will cause secondary pollution, the utilization rate of ozone is also low, and the treatment effect is not good. Therefore, the application in wastewater treatment is largely limited. Therefore, how to use catalytic ozonation to carry out heterogeneous catalysis, improve the utilization rate of ozone, enhance the ability of ozone oxidation, and reduce the t...

Examples

Embodiment 1

[0018] Example 1, the fly ash is screened out of coarse particles and the water content is measured. The water content is required to be below 1%. Gypsum and lime are pulverized into fine powders less than 200 mesh, and iron oxide powder and copper oxide powder with a particle size of less than 400 mesh are selected. and manganese oxide powder; according to the batching ratio of each mold, 62% of fly ash, 6% of cement, 5% of gypsum, 20% of lime, 3% of iron oxide powder, 2% of copper oxide powder, 2% of manganese oxide powder and the above raw materials Add aluminum powder with a total weight of 0.06% into the batching tank, start the stirring device and add water to stir and mix to make a mixed slurry with a specific gravity of 1.72-1.73; pump the above mixed slurry into the foamed brick mold for 20 minutes; foam Finally, lay the adobe into a block of 240×200×600mm, then put the block into an autoclave, and consolidate it for 30 minutes at a temperature of 160°C and a saturatio...

Embodiment 2

[0019] Example 2, the fly ash is screened out of coarse particles and the water content is measured. The water content is required to be below 1%, and the gypsum and lime are pulverized into fine powders less than 200 mesh, and iron oxide powder and copper oxide powder with a particle size of less than 400 mesh are selected. and manganese oxide powder; according to the batching ratio of each mold, 64% of fly ash, 6% of cement, 6% of gypsum, 15% of lime, 3% of iron oxide powder, 3% of copper oxide powder, 3% of manganese oxide powder and the above-mentioned Add aluminum powder with a total weight of 0.07% of the raw materials into the batching tank, start the stirring device and add water to stir and mix to make a mixed slurry with a specific gravity of 1.71-1.72; pump the above mixed slurry into the foaming brick mold and foam for 20 minutes; After soaking, lay the bricks into a block of 240×200×600mm, then put the block into an autoclave, and consolidate it for 35 minutes at a...