Device and method for pretreatment of refuse burning flyash by wet method

The invention provides a method for performing wet-process pretreatment on waste incineration fly ash, which comprises: adding air and water into the incineration fly ash, mixing and fully stirring the incineration fly ash and the water, making soluble compositions in the incineration fly ash enter into the water, subsequently performing standing and precipitation, and generating fly ash deposit; and discharging separated water in the fly ash deposit, drying the fly ash deposit until the water content reaches less than 30 percent, and generating fly ash finished products. The invention also provides a device for performing wet-process pretreatment on the waste incineration fly ash, which comprises a washing precipitation tank, a medicine tank and a drying bed, wherein the washing precipitation tank is used for adding the water, stirring and washing the incineration fly ash, making chlorine ions in the incineration fly ash dissolved into the water, demixing a mixture after stopping stirring ...

Method for conditioning municipal rest sludge with industrial epoxy resin wastewater

The invention relates to a method for conditioning municipal rest sludge with industrial epoxy resin wastewater, which belongs to the technical field of environment engineering. The essentials of the method are as follows: a certain amount of industrial epoxy resin wastewater is added into sludge with 99 percent of water content; the volume ratio of the sludge to the high-salinity industrial epoxy resin wastewater which serves as the conditioner is 1:1 to 1:2, so that the water content of the sludge is reduced when the sludge is changed from a free water form to a sludge floc form so as to meet the pre-treatment requirement before sludge treatment, i.e. meet and satisfy the requirement on the 80 percent of pre-treatment water content of municipal sludge, and then carry out landfill, burning or other agricultural treatment. The method for conditioning municipal rest sludge with industrial epoxy resin wastewater has the advantages of simple process and convenient and feasible operation.

Comprehensive recovery and utilization method of waste NiCd battery

The present invention relates to the harmless disposed of waste NiCd battery and the reuse of matter. Waste NiCd battery after being detached and broken is vacuum heated, Cd and plastic are recoveredthrough gasification and condensation, and the rest gas is active carbon treated and exhausted in the standard. Crushed waste battery is acid leached and filtered to obtain residue, which contains small amount of un-dissolved metal and may be returned for re-dissolution, and filtrate, which is oxidized or neutralized, and heated to prepare ferrite. The present invention realizes the comprehensiverecovery and reuse of various heavy metals.

Comprehensive recovery and utilization method of waste mercuric dry battery

Comprehensive recovery and utilization method of waste mercuric battery

The present invention relates to the harmless disposal of waste battery and the reuse of matter. Waste mercuric battery is first vacuum heated, mercury and plastic are recovered through gasification and condensation, and the rest gas is active carbon treated and exhausted in the standard. Crushed waste battery is acid dissolved to leach out its metal and the leachate is filtered to obtain residue, which contains carbon powder and small amount of un-dissolved MnO and may be further used as battery and other industry material, and filtrate, which is mixed with ferrous sulfate and alkali to prepare ferrite. The present invention realizes the comprehensive recovery and reuse of various heavy metals.

Innocent treatment method and apparatus for refuse burning flyash

The invention proposes a method for the innocent treatment of refuse burning fly ash. The method comprises the following steps: prewetting; pulping: mixing and stirring the fly ash and water in the proportion of 1:2 to 1: 20 to form ash slurry; water washing and precipitation: dissolving the soluble salts in the fly ash; modification through a reagent; concentration for reducing the water content of the ash slurry to 70 to 90 percent; dehydration for reducing the water content of the ash slurry to below 35 percent; water treatment: charging CO2 or acid to make the strongly basic supernatant with the pH value as high as 11 to 12 become the neutral water quality with the pH value of 6.0 to 8.5; flocculant addition for catching tiny particles and speeding up the precipitation process; cement preparation: heating up the fly ash end product in a cement rotary kiln to 1,000 to 1,450 DEG C, and decomposing dioxin and inhibiting the regeneration of the dioxin at the low temperature; and increase ...

Comprehensive recovery and utilization method of waste nickel-cadmium battery

Method for cooperative reclaiming flyash and sludge in refuse incineration

The invention relates to a method for fly ash and sludge disposal resource utilization from refuse incineration, which belongs to the environmental engineering technique field. The method adopts the following processes: fly ashes and sludge are mixed in proportion of 1: 10-1: 50 under the normal temperature, wherein the mass unit of fly ashes is gram and the volume unit of sludge is milliliter, proper heavy metal stabilizer is added to the mixture for fully mixing and agitation for fifteen to thirty minutes, and the control range of the pH value is between 9 and 12. The fly ash and sludge mixture can be obtained by washing, pressure filtration and drying. The water content of the sludge is reduced, the heat value is increased and the chloride ion content in the fly ashes is reduced through the synergistic disposal. The treated fly ash and sludge mixture can meet the material requirements of the cement production, thereby realizing the fly ash/sludge synergistic resource utilization.

Innocent treatment method and apparatus for refuse burning flyash

The present invention proposes a method for the innocent treatment of refuse burning fly ash. The method comprises the following steps: prewetting; pulping: mixing and stirring the fly ash and water in the proportion of 1:2 to 1: 20 by weight to form ash slurry; water washing and precipitation: dissolving the soluble salts in the fly ash; modification through a reagent; concentration for reducing the water content of the ash slurry to 70 to 90 percent by weight; dehydration for reducing the water content of the ash slurry to below 35 percent by weight; water treatment: charging CO2 or acid to make the strongly basic supernatant with the pH value as high as 11 to 12 become the neutral water quality with the pH value of 6.0 to 8.5; flocculant addition for catching tiny particles and speeding up the precipitation process; cement preparation: heating up the fly ash end product in a cement rotary kiln to 1,000 to 1,450 DEG C, and decomposing dioxin and inhibiting the regeneration of the dioxin ...

Method for cooperative reclaiming flyash and sludge in refuse incineration

The invention relates to a method for fly ash and sludge disposal resource utilization from refuse incineration, which belongs to the environmental engineering technique field. The method adopts the following processes: fly ashes and sludge are mixed in proportion of 1: 10-1: 50 under the normal temperature, wherein the mass unit of fly ashes is gram and the volume unit of sludge is milliliter, proper heavy metal stabilizer is added to the mixture for fully mixing and agitation for fifteen to thirty minutes, and the control range of the pH value is between 9 and 12. The fly ash and sludge mixture can be obtained by washing, pressure filtration and drying. The water content of the sludge is reduced, the heat value is increased and the chloride ion content in the fly ashes is reduced through the synergistic disposal. The treated fly ash and sludge mixture can meet the material requirements of the cement production, thereby realizing the fly ash/sludge synergistic resource utilization.

Percolate biology physical and chemical treatment device of municipal solid waste landfill

The invention provides a percolate biology physical and chemical treatment device of a municipal solid waste landfill, which comprises an improved anaerobic adjusting tank, a recirculation area, an aged refuse reactor, a high-grade oxidation pond, a high-grade adsorption and sedimentation tank, an artificial wet land and an ecological landscape treating pond, wherein the improved anaerobic adjusting tank pretreats percolate; the recirculation area is connected with the improved anaerobic adjusting tank and further treats the percolate; the aged refuse reactor is connected with the recirculation area and adsorbs and degrades the percolate; the high-grade oxidation pond is connected with the aged refuse reactor, and the percolate is reacted chemically in the high-grade oxidation pond; the high-grade adsorption and sedimentation tank is connected with the high-grade oxidation pond, and activated carbon is arranged in the high-grade adsorption and sedimentation tank to adsorb sediment in the ...

Method of deeply purifying consumer waste infiltration liquid difficult degradation tail water by cement-based composite material

The invention discloses a deep purifying method of difficult decomposing tail gas of living rubbish percolation liquid through cement based composite material, which comprises the following steps: blending silicate cement and analytical pure CaCO3 powder with weight rate at 2-3: 1; loading the mass into PVC column with pore on the bottom; sprinkling tail water of percolation liquid on the reactinglayer intervally; controlling the percolation water load at 0.6-0.8mL.g<-1>.d<-1>; flowing tail water from the pore on the bottom of column after percolating the reacting layer; making the yielding water reach GB16889-1997 two-grade discharge standard within 20 d; regenerating reacting material for many times through sintering under 900 deg.c for 1h.

Percolate biology physical and chemical treatment device of municipal solid waste landfill

The invention provides a percolate biology physical and chemical treatment device of a municipal solid waste landfill, which comprises an improved anaerobic adjusting tank, a recirculation area, an aged refuse reactor, a high-grade oxidation pond, a high-grade adsorption and sedimentation tank, an artificial wet land and an ecological landscape treating pond, wherein the improved anaerobic adjusting tank pretreats percolate; the recirculation area is connected with the improved anaerobic adjusting tank and further treats the percolate; the aged refuse reactor is connected with the recirculation area and adsorbs and degrades the percolate; the high-grade oxidation pond is connected with the aged refuse reactor, and the percolate is reacted chemically in the high-grade oxidation pond; the high-grade adsorption and sedimentation tank is connected with the high-grade oxidation pond, and activated carbon is arranged in the high-grade adsorption and sedimentation tank to adsorb sediment in the ...

Technological process for preprocessing refuse burning fly-ash to be cement raw materials

The invention provides a technique which makes the solid waste incineration fly ash into cement raw materials, comprising the following steps: washing, stirring, adding heavy metal stabilizer, separating liquid from solid waste incineration fly ash, mixing the solid waste incineration fly ash into the cement raw meal and sending the raw meal into a cement rotary kiln to calcine the raw meal so as to prepare the cement clinker. The invention also provides a method for treating the wastewater generated in the washing process. The solid waste incineration fly ash treated through the method disclosed in the invention can partially substitute for cement raw materials to prepare cement, while all the indicators of the cement can meet the relevant standards so as to effectively realize solid waste incineration fly ash resource utilization.

Organic serous anaerobic resource recycling system and method based on family kitchen wastes

The invention relates to an organic serous anaerobic resource recycling system and method based on family kitchen wastes. The system comprises a receiving bucket, two bouncing devices, a screw press and an anaerobic digestion reactor, wherein the receiving bucket is used for receiving the family kitchen wastes, and the two bouncing devices are provided with pneumatic separation mechanisms. The system separates plastic wastes, heavy materials and intermediate materials through bag breaking, primary and secondary elastic screening and primary and secondary pneumatic screening, and finally the intermediate materials are extruded through the screw press to obtain kitchen waste serous fluid; the kitchen waste serous fluid is transported to the anaerobic digestion reactor and subjected to anaerobic digestion with a semi-dry method, and the residual kitchen waste dry residues are transported to an incineration plant to be incinerated. The system can effectively separate metal impurities and other ...