Summary of the invention
Deficiency at existing sludge drying agent existence, the purpose of this invention is to provide the sludge drying agent that a kind of porous contains natural mineral, it has the very strong characteristics of water-permeable, ventilation property and water-retentivity, mud that can water content is very big (usually greater than 85%) becomes water content below 45% about 15 days, form the soil structure in condensation cure jail.
The objective of the invention is to realize by following scheme:
A kind of sludge drying agent, meter mainly comprises the plant ash of 85-93 part, the potassium humate of 3-8 part, the heavy-calcined magnesia of 2-4 part and the silicon-dioxide of 1-3 part by weight.
Plant ash has no particular limits, and common gets final product, and preferred particle size is the above plant ash of 80 orders, and more preferably more than 200 orders, it can be buied from biomass fermentation power plant.
This sludge drying agent can also contain humic acid or turfy soil.
Wherein, in the said components, plant ash has the effect of suction and water conservation; Potassium humate has permeable effect; Heavy oxygen has the heavy metal passivation; Silicon-dioxide has ventilative effect.
Another object of the present invention provides the preparation method of described sludge drying agent.
The preparation method of sludge drying agent of the present invention is as follows, and it includes following steps:
Each component is mixed and stir.
A further object of the present invention provides the purposes of described sludge drying agent.
Above-mentioned sludge drying agent is used for water-containing sludge is carried out half-driedization or curing,
Last purpose of the present invention provides the using method of described sludge drying agent.
Adopt the Mechanical Driven fluidized-bed process, by the throwing of turning over of plow-shape shovel mud is broken up, and under loose state, carried out thorough mixing with above-mentioned sludge drying agent.The weight ratio of sludge drying agent and mud is preferably 1: 10-1.5: 10.
Can make mud and sludge drying agent thorough mixing by above-mentioned method, and realize cheap running cost (being low power consumption, low consumption) and good mud physical aspect, this is that traditional mechanical stirring hybrid technology can't satisfy.
The present invention has following advantage: (1) sludge drying agent component of the present invention is harmless, environmentally friendly, environmental protection can make the mud after the processing be used for a plurality of fields such as agricultural, afforestation, soil improvement, building materials raw material, waste incineration, power plant's burning, cement mill burning, refuse landfill overburden soil; (2) only need just to make about 15 days water content to become water content below 45% greater than 85% mud; (3) sludge drying agent of the present invention can make mud become weakly alkaline, can kill the microorganism and the bacterium of part on the one hand, can also form harmless compound in conjunction with the part metals ion in the mud on the other hand and reach heavy metal-passivated ionic effect, and the desulfurization that also is of value to the flue gas that the mud after the processing produces when burning is handled; (4) contain porous component and natural mineral in the sludge drying agent of the present invention, can reduce the volatilization of ammonia, thereby play the smelly effect that presses down; (5), can make sludge drying agent of the present invention and mud thorough mixing, and realize cheap running cost (being low power consumption, low consumption) and good mud physical aspect by adopting the Mechanical Driven fluidized-bed process; (6) mud after sludge drying agent of the present invention is handled is particulate state and character stabilizer pole, the sludge volume rule also is convenient to transportation, thereby improves storage and transportation conditions, avoids secondary flying ash, percolate to leak, save a large amount of middle costs, and then reduced processing cost.
Embodiment
Embodiment 1
The present invention is grouped into by four kinds of nontoxic one-tenth, and the amount of each component is measured by weight, and thorough mixing forms.
Wherein: plant ash accounts for 85 weight parts, potassium humate accounts for 8 weight parts, heavy-calcined magnesia accounts for 4 weight parts, silica comprises 3 weight parts, granular size are more than 100 orders, get the wet mud 100KG (water ratio is greater than 85%) of sewage work, in 10: 1 (mud: after ratio thorough mixing drying agent) is even, under the condition of 12 degrees centigrade of medial temperatures, natural air drying is after 5 days, and water ratio reduces to 65%; Behind the natural air drying 10 days, water ratio reduces to 50%; Behind the natural air drying 15 days, water ratio reduces to 38%, and pH value is 7.8, satisfies sludge disposal mummification requirement fully.
Embodiment 2
Be grouped into by four kinds of nontoxic one-tenth, the amount of each component is measured by weight, thorough mixing forms, wherein, plant ash accounts for 90 weight parts, potassium humate accounts for 7 weight parts, heavy-calcined magnesia accounts for 2 weight parts, silica comprises 1 weight part, the granular size of this plant ash are more than 200 orders, get the wet mud 100KG (water ratio is greater than 85%) of sewage work, in 10: 1.2 (mud: after ratio thorough mixing drying agent) is even, under the condition of 10 degrees centigrade of medial temperatures, natural air drying is after 5 days, and water ratio reduces to 66%; Behind the natural air drying 10 days, water ratio reduces to 53%; Behind the natural air drying 15 days, water ratio reduces to 43%, and pH value is 8.1, satisfies sludge disposal mummification requirement substantially.