A kind of solid organic dehydrating agent and preparation method thereof

Abstract

The invention discloses a solid organic dehydrating agent and a preparation method thereof, belonging to the field of dehydrating agent preparation. The method includes: adding deionized water, acrylamide, cationic monomer, multifunctional UV monomer, chelating agent, and chain transfer agent to the batching tank in sequence, stirring evenly to form a pre-polymerized liquid, and then adding a macromolecular photoinitiator And an azo initiator, and carry out photopolymerization; obtain a solid organic dehydrating agent. In the present invention, a macromolecular photoinitiator is used to initiate the graft copolymerization of acrylamide, a multifunctional UV monomer and a cationic monomer, and the multifunctionality of the macromolecular photoinitiator is used as a crosslinking center. Functionality characteristics can also be used as a cross-linking center to carry out copolymerization with acrylamide and cationic monomers, which can make the copolymerization product form a highly branched structure, form three-dimensional channels in the molecular chain and between molecular chains, and make the sludge dewatering machine show macroscopically Higher adsorption and desorption effects on most liquids.

Description

technical field

[0001] The invention belongs to the field of dehydrating agent preparation, in particular to a solid organic dehydrating agent and a preparation method thereof. Background technique

[0002] At present, the mainstream route of sludge treatment and disposal is: "deep dehydration (mud cake moisture content ≤ 60%) + incineration or land use". The mainstream equipment for deep dehydration is a plate and frame filter press. The organic matter content of municipal sludge is relatively high, and the sludge specific resistance is high. It is difficult to dewater using a plate and frame filter press. Adding conventional PAM flocculants, the moisture content of the mud cake cannot reach ≤60% Moisture content requirements, in order to reduce the water content of mud cake, the current common method is to add inorganic conditioners such as lime, iron salt or aluminum salt to the sludge, usually the total amount of lime, iron salt and aluminum salt added is as high as 300-...

Examples

Embodiment 1

[0038] Add 3740kg of deionized water to the batching kettle, start stirring, add 3710kg of 40% acrylamide aqueous solution, 10520kg of 80% acryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg Disodium ethylenediamine tetraacetate, 0.36kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.00; The liquid is transferred to the oxygen removal device at 3 tons / hour for oxygen removal, and a macromolecular photoinitiator is added to the pipeline to polymerize [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)phenyl ]acetone] solution and azo initiator VA044 solution, concentration

[0039] Both are 10%, and the flow rate is 1.34kg / hour and 0.40kg / hour respectively. After mixing evenly, enter the ultraviolet light belt type equipment to carry out light-induced polymerization reaction. After the reaction is completed, the liquid becomes a rubber bloc...

Embodiment 2

[0041]Add 3740kg of deionized water to the batching kettle, start stirring, add 3710kg of 40% acrylamide aqueous solution, 10520kg of 80% methacryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg disodium ethylenediaminetetraacetic acid, 0.45kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.00; turn on the cooling, reduce the material to 0 °C; The polymerization liquid is transferred to the oxygen removal device at 3 tons / hour for oxygen removal, and a macromolecular photoinitiator is added to the pipeline to polymerize [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)benzene Base] acetone] solution and azo initiator VA044 solution, the concentration is 10%, the flow rate is 1.34kg / hour and 0.40kg / hour respectively, after mixing evenly, enter the ultraviolet light belt type equipment to carry out light-induced polymerization reaction, afte...

Embodiment 3

[0043] Add 4410kg of deionized water to the batching tank, start stirring, add 13500kg of 80% acryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg ethylenediaminetetraacetic acid disodium, 0.45kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.50; Deoxygenation device for oxygen removal, macromolecular photoinitiator polymerization [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)phenyl] acetone] solution and azo initiated in the pipeline VA044 solution, the concentration is 10%, the flow rate is 1.34kg / hour and 0.40kg / hour respectively, after mixing evenly, it enters the ultraviolet light belt type equipment for light-induced polymerization reaction, after the reaction is completed, the liquid becomes a glue block, and then the glue The lumps are granulated, dried, ground, and sieved to obtain solid sludge dewatering products;

technical field

[0001] The invention belongs to the field of dehydrating agent preparation, in particular to a solid organic dehydrating agent and a preparation method thereof. Background technique

[0002] At present, the mainstream route of sludge treatment and disposal is: "deep dehydration (mud cake moisture content ≤ 60%) + incineration or land use". The mainstream equipment for deep dehydration is a plate and frame filter press. The organic matter content of municipal sludge is relatively high, and the sludge specific resistance is high. It is difficult to dewater using a plate and frame filter press. Adding conventional PAM flocculants, the moisture content of the mud cake cannot reach ≤60% Moisture content requirements, in order to reduce the water content of mud cake, the current common method is to add inorganic conditioners such as lime, iron salt or aluminum salt to the sludge, usually the total amount of lime, iron salt and aluminum salt added is as high as 300-...

Examples

Embodiment 1

[0038] Add 3740kg of deionized water to the batching kettle, start stirring, add 3710kg of 40% acrylamide aqueous solution, 10520kg of 80% acryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg Disodium ethylenediamine tetraacetate, 0.36kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.00; The liquid is transferred to the oxygen removal device at 3 tons / hour for oxygen removal, and a macromolecular photoinitiator is added to the pipeline to polymerize [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)phenyl ]acetone] solution and azo initiator VA044 solution, concentration

[0039] Both are 10%, and the flow rate is 1.34kg / hour and 0.40kg / hour respectively. After mixing evenly, enter the ultraviolet light belt type equipment to carry out light-induced polymerization reaction. After the reaction is completed, the liquid becomes a rubber bloc...

Embodiment 2

[0041]Add 3740kg of deionized water to the batching kettle, start stirring, add 3710kg of 40% acrylamide aqueous solution, 10520kg of 80% methacryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg disodium ethylenediaminetetraacetic acid, 0.45kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.00; turn on the cooling, reduce the material to 0 °C; The polymerization liquid is transferred to the oxygen removal device at 3 tons / hour for oxygen removal, and a macromolecular photoinitiator is added to the pipeline to polymerize [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)benzene Base] acetone] solution and azo initiator VA044 solution, the concentration is 10%, the flow rate is 1.34kg / hour and 0.40kg / hour respectively, after mixing evenly, enter the ultraviolet light belt type equipment to carry out light-induced polymerization reaction, afte...

Embodiment 3

[0043] Add 4410kg of deionized water to the batching tank, start stirring, add 13500kg of 80% acryloyloxyethyltrimethylammonium chloride monomer aqueous solution, UV monomer PETA0.15kg, 2kg ethylenediaminetetraacetic acid disodium, 0.45kg sodium bisulfite; stir evenly to form a pre-polymerization liquid of a certain concentration, add citric acid to adjust the pH of the solution to about 4.50; Deoxygenation device for oxygen removal, macromolecular photoinitiator polymerization [2-hydroxyl-2-methyl-1-[4-(1-methylvinyl)phenyl] acetone] solution and azo initiated in the pipeline VA044 solution, the concentration is 10%, the flow rate is 1.34kg / hour and 0.40kg / hour respectively, after mixing evenly, it enters the ultraviolet light belt type equipment for light-induced polymerization reaction, after the reaction is completed, the liquid becomes a glue block, and then the glue The lumps are granulated, dried, ground, and sieved to obtain solid sludge dewatering products;

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