CN107445272A

CN107445272A - A kind of desalinization high polymer coagulant

Info

Publication number: CN107445272A
Application number: CN201710598513.0A
Authority: CN
Inventors: 陈新
Original assignee: YANGZHOU KEYU CHEMICAL CO Ltd
Current assignee: YANGZHOU KEYU CHEMICAL CO Ltd
Priority date: 2017-07-21
Filing date: 2017-07-21
Publication date: 2017-12-08

Abstract

The invention discloses a kind of desalinization high polymer coagulant, belong to high polymer coagulant technical field.Proportionally it is well mixed by 20% 40% acrylamide aqueous solutions, 10% 20%MPS, 10% 25%AANa, 20% 25%SSA and 25% 40% deionized waters, formed using near adiabatic precipitation from aqueous solution process polymerisation, its initiation system used triggers system for K R A ternarys, and the chain-transferring agent used is the compound chain-transferring agent of NTP urea JFC.Initiator and chain-transferring agent that this polymerization system uses can obtain the copolymer product that super high molecular weight, apparent viscosity height, good water solubility, strand be submissive and active function groups are evenly distributed；Polymeric kettle inwall uses silicone rubber resina coating；The present invention provides a kind of high polymer coagulant of high-quality and efficient high performance-price ratio for seawater desalinization pretreatment, and its positive effect is better than inorganic molysite and chitosan low molecule flocculant.

Description

A kind of desalinization high polymer coagulant

Technical field

The present invention relates to desalinization high polymer coagulant technical field, and specifically, more particularly to a kind of seawater is light Change high polymer coagulant.

Background technology

Earth surface has 70% to be covered with water, but only 2.5% is the fresh water for being available for human use.Expect 2025 Year, 3,000,000,000 people will be had in the world faces water shortage.In China, water environment is equally severe, in national 668 counties and cities, has more than 400 It is individual to have formed the potential collision hazard for influenceing Science in Future in China development and safety.

As the increment technique of increasing income of water resource, desalinization is considered as the important channel for solving global water resources crisis, The popularization extension of desalination technology, important function has all been played at many aspects that we live.In recent years, Chinese seawater Desalt processing technology is increasingly ripe, and industry size rapidly increases, and has basically formed more complete industrial system.

With the fast development of national desalinization industry, the city of close crucial medicament and whole process chemicals therewith Field will further expand.Desalinization special agent belongs to the operating easily-consumed products of Seawater Desalination Project.In prior art condition Under, Seawater Desalination Project has stronger dependence to desalinization special agent.

Bitter system of seawater system, saline and alkaline is high and pollutant containing biomass, must be applied in desalinization industry salt tolerant, Alkaline-resisting, antibiotics pollutant desalinization Special flocculant processing can reach satisfied effect.

Flocculant is one of medicament commonly used in counter-infiltration sewage desalination process, and the effect of flocculating setting directly affects The effect of Seawater Treatment, so as to have impact on the safe operation of reverse osmosis desalination device.Therefore excellent performance is researched and developed Flocculant, Seawater Treatment effect is improved, for decelerating membrane pollution, extend the service life of film, reduce the cleaning time of film, protect The safe operation for demonstrate,proving reverse osmosis unit is significant.

In the prior art, the inorganic flocculating agent such as poly-ferric chloride, its molecular weight is extremely low, because of inorganic salts not by high salinity and It pollutes the environment degradable of water system, and is paid close attention to by people, the focus for area research exploitation of once being flocculated for desalinization.State The poly-ferric chloride of interior research and development or poly-ferric chloride system flocculate with the compound desalinization of both organic molecule polymer Agent, the former is single inorganic iron-based flocculating agent, and the latter is Inorganic whisker type flocculant.Inorganic iron-based flocculating agent and shell Although glycan composite flocculant can adapt to the flocculation of seawater high salt, high pollution aqueous systems in seawater desalinization pretreatment, Its molecular weight is low, and floc sedimentation size, sinking speed and flocculating effect are far away from organic polymer coargulator.

In domestic organic polymer coargulator flocculation process, floc sedimentation is big, and sinking speed is fast, and positive effect is better than inorganic iron Salt or organic low molecular polymer flocculants, but existing high polymer coagulant salt resistance, anticalcium magnesium and seawater living matter pollutant Ability, for being restricted in desalting process.

At present, Domestic Scientific Research institutes also is stepping up to research and develop the special high polymer coagulant of desalinization.

In introducing work(on molecular structure on the basis of " heatproof, high capability of anti-salt AMPS polymer " that my company researches and develops in early stage Energy property monomer, efficiently triggers system and disjunction heating technique using K-R-A, the special GPMS macromolecules of desalinization prepared Flocculant, its 0.5% aqueous solution apparent viscosity >=20mpas, tool sea water resistance, high salt, high pH value and the characteristic of biomass pollution, The floc sedimentation of formation is big and solid, and sinking speed is fast, and separation is obvious, and shows excellent effect.

The content of the invention

Acrylamide functional monomer is mixed in proportion, adopted with AMPS, SSA, AANa, AM combined polymerization by the present invention The special high polymer coagulant of desalinization is made near adiabatic precipitation from aqueous solution technique, to overcome existing for prior art Defect.

The present invention is achieved by the following technical solutions：

A kind of desalinization high polymer coagulant, by 20%-40% acrylamide aqueous solutions, 10%-20%MPS, 10%-25%AANa, 20%-25%SSA and 25%-40% deionized water are proportionally well mixed, using near adiabatic water Solution copolymerization process polymerisation forms, its initiation system used for K-R-A ternarys trigger system, the chain-transferring agent used for The compound chain-transferring agents of NTP- urea JFC, the K-R-A ternarys trigger system to include K₂S₂O₈, organic amine and NaHSO₃, the K- R-A ternarys initiation system accounts for the 0.01%-1% of gross weight, and the chain-transferring agent accounts for the 0.01%-1% of gross weight；The height The preparation process of molecular flocculant is as follows：Each monomer is added in polymeric kettle, adjustment temperature is passed through High Purity Nitrogen and entered to 10-12 DEG C Row deoxygenation, initiator and chain-transferring agent are sequentially added, continue after logical nitrogen 10min polyase 13-8 hours at 10-20 DEG C of temperature, And 1-6 hours are incubated, 0.2-0.6mpa compressed air compressed materials are used after polymerization insulation, obtain polymer gel, polymer Frozen glue obtains desalinization macromolecule through fluidized drying 1-3 hours, dried material under 60-90 DEG C of hot blast through crushing, sieving Flocculant.

Organic amine in the K-R-A ternarys initiation system uses fatty amines or aromatic amine.

Its reactor used scribbles the reactor of silicone rubber resina for inwall.

Compared with prior art, the beneficial effects of the invention are as follows：

1st, it is high, water-soluble that the initiator and chain-transferring agent that this polymerization system uses can obtain super high molecular weight, apparent viscosity Get well, the copolymer product that strand is submissive and active function groups are evenly distributed；

2nd, polymeric kettle inwall uses silicone rubber resina coating, and gel can be pressed smoothly by 0.2-0.6mpa compressed air Go out；

3rd, it is granulated through efficiently anti-sticking technology, in hot-air drying process, material is in loose condition (of surface), rate of drying block, energy consumption Low, molecular degradation is small in drying process, product dissolution velocity block；

4th, the present invention provides a kind of high polymer coagulant of high-quality and efficient high performance-price ratio for seawater desalinization pretreatment, its Positive effect is better than inorganic molysite and chitosan low molecule flocculant；

5th, under high salt, high pH value, there is strong adsorption bridging ability and strong charge neutralization, the aggregation of formation Close and firm, the thick solid and higher mechanical strength of floc sedimentation.Can directly it be prepared with high salinity seawater, sinking speed is fast, uses Amount saves, and improves the utilization rate of equipment, dosage is the 2/3 of import auxiliary products, you can reaches its effects equivalent, completely may be used With similar flocculant product outside surrogate.

Embodiment

The present invention is further described below：

Acrylamide functional monomer is mixed in proportion, adopted with AMPS, SSA, AANa, AM combined polymerization by the present invention With near adiabatic precipitation from aqueous solution technique, in polymerizing condition, High Purity Nitrogen (99999) deoxygenation is passed through.

The present invention triggers system using K-R-A ternarys, and the compound chain-transferring agent low temperature of NTP- urea JFC triggers (10-12 DEG C), the competing poly- power of each monomer, keeping body system polymerization speed are effectively controlled, reaction temperature steadily rises, polymerization process Steadily, it can obtain that super high molecular weight, apparent viscosity be big, product good water solubility, the high-molecular copolymer without gel.

The concentration of aqueous solution of polymer monomers is controlled in 25%-40%, 10-20 DEG C of polymerization initiation temperature, polymerization time 3- 8 hours, soaking time 1-6 hours.

Because the molecular weight of polymer, apparent viscosity are very high, with the stainless steel suitable for aqueous solution near adiabatic polymerization technique The cohesive force of reactor kettle wall is very strong, using silicone rubber resina to kettle wall coating, is compressed after polymerization insulation using 0.2-0.6mpa Air compressed material, polymer gel can smooth dischargings.

The present invention is granulated to the copolymer frozen glue of gained and pass through efficiently anti-sticking technical finesse, in 60-90 DEG C of hot blast It is lower through fluidized drying 1-3 hours, dried material is through crushing, sieving and obtaining desalinization polymeric flocculant products.

Embodiment：Acrylamide aqueous solution 2000g (concentration 90%), MPS1500g, AANa1500g, SSA1500g, go Ionized water 2900g, adding in polymeric kettle, adjustment temperature is sequentially added to 12 DEG C with the percentage of polymer monomers gross weight, After being passed through High Purity Nitrogen deoxygenation 30 minutes, initiator 5g, chain-transferring agent 5g are added, continues logical nitrogen and closes all valves after 10 minutes, It is aggregated reaction 4 hours, when reaction no longer heat up when carry out insulation 2 it is small when after, with 0.3mpa compressed airs by colloid extrude into Row is granulated, and obtains 0.4mm particles and through the gel of anti-sticking technical finesse, carries out fluidized drying after 2 hours through crushing, sieving, Obtain desalinization high polymer coagulant.

Its properties of product and market properties of product are contrasted, main technical performance index parameter is shown in Table one：

Table one

From table one, for the desalinization flocculant that the present invention obtains in terms of seawater flocculation sedimentation, the floc sedimentation of formation is thick It is big solid, and sinking speed is fast, the colourity, turbidity after processing are substantially better than other polymeric flocculant products.

In summary, only presently preferred embodiments of the present invention, not it is used for limiting the scope that the present invention is implemented, it is all According to the equivalent changes and modifications carried out by the shape described in scope of the invention as claimed, construction, feature and spirit, all should include In in scope of the presently claimed invention.

Claims

A kind of 1. desalinization high polymer coagulant, by 20%-40% acrylamide aqueous solutions, 10%-20%MPS, 10%- 25%AANa, 20%-25%SSA and 25%-40% deionized water are proportionally well mixed, and are total to using the near adiabatic aqueous solution Polymerization technique is polymerized, it is characterised in that：Its initiation system used triggers system, the chain tra nsfer of use for K-R-A ternarys Agent is the compound chain-transferring agents of NTP- urea JFC, and the K-R-A ternarys trigger system to include K₂S₂O₈, organic amine and NaHSO₃, institute The 0.01%-1% that K-R-A ternarys trigger system to account for gross weight is stated, the chain-transferring agent accounts for the 0.01%-1% of gross weight；It is described The preparation process of high polymer coagulant is as follows：Each monomer is added in polymeric kettle, adjustment temperature is passed through High Purity Nitrogen to 10-12 DEG C Deoxygenation is carried out, sequentially adds initiator and chain-transferring agent, continues after logical nitrogen 10min that polyase 13-8 is small at 10-20 DEG C of temperature When, and 1-6 hours are incubated, 0.2-0.6mpa compressed air compressed materials are used after polymerization insulation, obtain polymer gel, are polymerize Thing frozen glue obtains desalinization high score through fluidized drying 1-3 hours, dried material under 60-90 DEG C of hot blast through crushing, sieving Sub- flocculant.
A kind of 2. desalinization high polymer coagulant according to claim 1, it is characterised in that：The K-R-A ternarys are drawn Organic amine in hair system uses fatty amines or aromatic amine.
A kind of 3. desalinization high polymer coagulant according to claim 1, it is characterised in that：Its reactor used for Inwall scribbles the reactor of silicone rubber resina.