CN101838097B

CN101838097B - Sludge drying agent and preparation method and using method thereof

Info

Publication number: CN101838097B
Application number: CN2010101418666A
Authority: CN
Inventors: 赵润林
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2011-11-30
Anticipated expiration: 2030-04-08
Also published as: CN101838097A

Abstract

The invention relates to a sludge drying agent and a preparation method and a using method thereof. The sludge drying agent is applied to sludge produced in a sewage treating process and can recycle the treated sludge. The sludge drying agent mainly comprises the following components in part by weight: 85 to 93 parts of plant ash, 3 to 8 parts of potassium humate, 2 to 4 parts of heavy magnesium oxide and 1 to 3 parts of silicon dioxide. The sludge drying agent has the characteristics of water permeability, air permeability and very high water-retaining property, and can change sludge with very high water content (generally over 85 percent) into sludge with the water content of less than 45 percent in about 15 days so as to form a firmly-condensed and solidified soil structure.

Description

A kind of sludge drying agent and preparation thereof and using method

Technical field

The present invention relates to a kind of sludge drying agent, by the preparation of multiple natural mineral, mud that the treating processes that is used for disposing of sewage produces and the utilization again that realizes handling back mud.

Background technology

Along with wastewater treatment in China factory progressively increase development with sewage disposal technology, the mud that sewage produces in treating processes is also progressively increasing.At present, a lot of Sewage Plant are still arbitrarily transported outward mud, simple landfill or stacking, and these waste organic matter content and water ratio are all very high, and it is smelly to rot easily, has caused destruction to environment.The existing mud method of handling generally has two kinds: a kind of is compost, and the problem of existence is: discharge obnoxious flavour at first in a large number, cause surrounding enviroment to pollute; Secondly spin cycle is long, generally moisture could be reduced to below 40% about 45 days; Be to solve frozen soil problem in winter once more; Also be to the most important thing is to solve so far the heavy metal content problem that exceeds standard at last.Another kind is to burn the problem of existence: the one, and cost is higher; The 2nd, residue might cause second environmental pollution.Existing drying agent adopts cement or lime as main raw material more, the organic nutrient that it has directly destroyed in the middle of the mud, and the mud Application Areas after causing it to handle is narrow.

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 is composed of the following components: the silicon-dioxide of the potassium humate of the plant ash of 85-93 part, 3-8 part, the heavy-calcined magnesia of 2-4 part and 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.

Claims

1. a sludge drying agent is counted by weight, and is composed of the following components: the silicon-dioxide of the potassium humate of the plant ash of 85-93 part, 3-8 part, the heavy-calcined magnesia of 2-4 part and 1-3 part.

2. sludge drying agent as claimed in claim 1, the granular size that it is characterized in that plant ash is more than 80 orders.

3. sludge drying agent as claimed in claim 1, the granular size that it is characterized in that plant ash is more than 200 orders.

4. as the preparation method of each described sludge drying agent of claim 1-3, comprise and each component is mixed and stir.

5. as the purposes of each described sludge drying agent of claim 1-3, comprise water-containing sludge is carried out half-driedization or curing.

6. as the using method of each described sludge drying agent of claim 1-3, comprise and 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.

7. method as claimed in claim 6, wherein the weight ratio of sludge drying agent and mud is 1: 10-1.5: 10.