Disposal method for high-salinity wastewater and waste incineration fly ash
A technology for waste incineration fly ash and high-salt wastewater, which is applied in flocculation/sedimentation water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. It can solve the problems of polluting high-salt wastewater and reduce the content of soluble chloride salts , good environmental benefits and social benefits
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0024] Mix waste incineration fly ash with a chlorine content of 15% and high-salt wastewater with a salt content of 2000mg / L at a ratio of 10% and 90%. Add 20ppm dispersant to the high-salt wastewater; mix the waste incineration fly ash and high-salt wastewater for 20 minutes, add 10ppm flocculant, after mixing, sedimentation and clarification, separate the supernatant from the primary sludge; Add a dehydrating agent with a sludge content of 0.01% to the mud, and further separate the mud and brine by vacuum filtration to obtain the final fly ash sludge, that is, secondary sludge, with a moisture content of about 35%; after drying at 105°C Post-measurement showed that the chlorine content of the sludge was 1.30%, and the concentration of the resulting supernatant was 18000mg / L.
Embodiment 2
[0026] Mix waste incineration fly ash with a chlorine content of 15% and high-salt wastewater with a salt content of 7000mg / L at a ratio of 11.1% and 88.9%. Add 20ppm dispersant to high-salt wastewater; after mixing waste incineration fly ash and high-salt wastewater for 30 minutes, add 15ppm flocculant, and after mixing, sedimentation and clarification, separate high-concentration brine as supernatant from primary sludge ; Then add a dehydrating agent with a sludge content of 0.02% to the primary sludge, and further separate the mud and brine by means of plate-and-frame filter press (the further separated brine is incorporated into the above-mentioned supernatant) to obtain the final fly ash The sludge, that is, the secondary sludge, has a water content of 42%; after drying at 105°C, the chlorine content of the sludge is 1.98%, and the resulting supernatant has a concentration of 25500mg / L.
Embodiment 3
[0028] The waste incineration fly ash with a chlorine content of 12% and the high-salt wastewater with a salt content of 5000mg / L were mixed at a ratio of 18% and 82%. Add 30ppm dispersant to the high-salt wastewater; mix the waste incineration fly ash and high-salt wastewater for 25 minutes, add 20ppm flocculant, after mixing, sedimentation and clarification, separate the high-concentration brine as the supernatant from the primary sludge ; Then add 0.02% dehydrating agent of the amount of sludge to the primary sludge, and realize the further separation of mud and brine by means of centrifugal dehydration (the further separated brine is incorporated into the above-mentioned supernatant) to obtain the final fly ash sludge The mud, that is, the secondary sludge, has a water content of 43%; after drying at 105°C, it is determined that the chlorine content of the sludge is 2.52%, and the concentration of the resulting supernatant is 30500mg / L.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More