Resource disposal method by conditioning and incinerating crop straw and sewage sludge
A technology for crop straw and sewage sludge, which is applied in combustion methods, incinerators, cement production, etc., can solve the problems of drastic increase in sludge treatment and disposal costs, achieve reduced heavy metal leaching, efficient and rapid drying, and lower moisture content Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0035] Mix straw powder and sludge with a water content of 70% by weight at a weight ratio of 1:5 at 15°C, and add a heavy metal stabilizer of 0.1% by weight for conditioning. The composition by weight percentage is: orthophosphate 20%, calcium oxide 20%, fluorapatite 40%, silicon oxide 20%, fully mixed and stirred for 15 minutes, pH 6, after washing and pressure filtration, the water content of the straw powder and sludge mixture decreased to 70% by weight, 160°C using steam as the drying medium for drying, the moisture content of the mixture of straw powder and sludge is reduced to 45% by weight, and it is in the form of solid particles; the mixture of straw and sludge after powder treatment can be directly Combustion is used as an alternative energy source of coal for heat generation. The residue and fly ash after incineration can be used as cement raw materials. The residue and fly ash are 3% of the total weight of cement raw materials. The indicators of ecological cement p...
Embodiment 2
[0037]Mix straw powder and sludge with a water content of 85% by weight at a weight ratio of 1:20 at 30°C, and add a heavy metal stabilizer of 1% by weight for conditioning. The composition by weight percentage is: orthophosphate 40%, calcium oxide 20%, fluoroapatite 20%, silicon oxide 20%, fully mixed and stirred for 30 minutes, pH 9, after washing and pressure filtration, the water content of the straw powder and sludge mixture decreased to 50% by weight, 200°C using the mixed gas of power plant tail gas and air as the drying medium for drying, the moisture content of the mixture of straw powder and sludge is reduced to 30% by weight, and it is in the form of solid particles; the straw after powder treatment and The sludge mixture can be burned directly as a coal alternative energy source for heat generation. The residue after incineration and incineration fly ash can be used as cement raw material. The residue and incineration fly ash are 10% of the total weight of cement ra...
Embodiment 3
[0039] At 25°C, the weight ratio of straw powder and sludge with a water content of 78% by weight is 1:12, and 0.4% by weight of a heavy metal stabilizer is added for conditioning. The composition by weight percentage is: orthophosphate 20% calcium oxide, 30% calcium oxide, 20% fluorapatite, 30% silicon oxide, fully mixed and stirred for 18 minutes, pH 7, after washing and pressing, the water content of the straw powder and sludge mixture decreased To 60% by weight, at 220 ℃, the tail gas of the cement plant is mixed with air for drying. The method is that the mixed gas of the tail gas of the cement plant and air is passed into the feeding section of the cement production to the preheater to reverse the mixing of the tail gas of the cement plant and the air. After the straw and sludge are further dried, the mixed gas enters the high temperature section of the rotary kiln and is emptied after passing through the tail gas treatment system of the cement production process. The mo...
PUM
| Property | Measurement | Unit |
|---|---|---|
| heating value | aaaaa | aaaaa |
| strength | aaaaa | aaaaa |
| strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More