CN103241820B - Preparation method of over-sprayed paint water treatment disinfectant in airplane coating technology - Google Patents

Abstract

The invention relates to a preparation method of an over-sprayed paint water treatment disinfectant in an airplane coating technology. The method is characterized in that the water treatment disinfectant comprises 1 parts by weight of viscosity reducer DMC-A and 1-3 parts by weight of flocculant DMC-B, and the viscosity reducer DMC-A and the flocculant DMC-B are mixed in 100 parts of water solution the pH of which is adjusted to be 8-9 by adding 20wt% liquid sodium hydroxide, so that the over-sprayed paint water treatment disinfectant is prepared, wherein the viscosity reducer DMC-A comprises a polyoxyethylene ether surfactant containing-NH perssad, an alcohol ether solvent and a polyether defoaming agent in a certain proportion, and the flocculant DMC-B comprises an amides polymer solution with 10 million of molecular weight and an aluminum salt mixed solution.

Description

A kind of aircraft coating process is crossed the method for making of spray paint water treatment agent

Technical field

The present invention relates to Treatment of Industrial Water technology, be specially in a kind of aircraft coating process the method for making of crossing spray paint water treatment agent, particularly a kind of aircraft middle method for making of processing the water treatment agent of spray paint of spraying paint.

Background technology

It is one of important process of aircraft manufacturing that application is sprayed paint.A large amount of over-sprayed paint fogs and organic solvent gas in application painting process, have been produced.If it not carried out to the physical and mental health that processing can have a strong impact on application operator, and serious environment pollution.According to the requirement of Occupational health and environmental protection.Domestic and international most of application enterprise all adopts water treatment wet method lacquer fog purifier to process the waste gas of paint spray booth, thereby must relate to the processing at wet type spray chamber internal recycle water.The selection of water treatment agent and dosing method have extremely significantly impact to whole water treatment effect. and conventional water treatment agent mainly contains: varnish remover, flocculation agent, PH conditioning agent, also comprise the defoamer controlling water quality and use, sterilant etc. in addition.The quality of water treatment agent directly has influence on the removal effect to over-sprayed paint fog in waste gas.

Lacquer mist coagulant, mainly in the processing of wet type spray chamber circulating water, is in a kind of Neng Jiang paint spray booth, to be recycled the spray paint excessively that water is collected, and generates after treatment a kind of medicament of the paint slag of the energy solid-liquid separation that there is no stickiness.Along with the development of modern application techniques, the spray paint of crossing is in use attached on water pump, pipeline because having stickiness, there will be, the problems such as plug nozzle, and the equipment that affects normally moves.Add coating cloud flocculation agent can eliminate fast the stickiness of painting in water body; and coating cloud is aggregated into porous scum silica frost floats on the water surface; make it easily to collect and salvage; thereby prevented paint sticking and stopping up various device and pipeline in spray paint treatment system; it is clean that Bing Shi paint spray booth keeps, thereby protected Working environment and operator ' s health.

Commercially available lacquer mist coagulant is all resin solution prepared by trimeric cyanamide and formaldehyde reaction substantially at present, and its shortcoming is; The one, the stability of trimeric cyanamide and formaldehyde resin solution is bad, and easily layering impact is used, and the 2nd, in reaction, residual formaldehyde easily causes secondary pollution to water body.

Summary of the invention

The present invention overcomes above-mentioned the deficiencies in the prior art, for processing the method for making that spray paint has been developed a kind of water treatment agent in aircraft coating process, the effective constituent that this method for making obtains water treatment agent is surfactant, safety non-toxic, can effectively make paint spray booth's organic solvent concentration obviously reduce, and reduce water body COD total amount, and circular water treating system precipitates while painting slag, do not need to change recirculated water, and can extend the duration of service of recirculated water.

The present invention is the method for making that a kind of aircraft coating process is crossed spray paint water treatment agent, it is characterized in that: water treatment agent is by disappear stick DMC-A and the flocculation agent DMC-B stick DMC-A that disappears by weight: flocculation agent DMC-B=1 part: 1-3 part forms, and be mixed in the aqueous solution that 100 parts of liquid sodium hydroxides by 20% weight concentration regulate pH to 8-9 and make;

The described stick DMC-A that disappears consists of by a certain percentage tensio-active agent, alcohol ether solvent and the polyethers defoamer of the polyethenoxy ether class containing-NH group; Described flocculation agent DMC-B is comprised of at 1,000 ten thousand acylamide polymer solution and the mixing solutions of aluminium salt molecular weight:

Component and the weight percentage of the wherein said stick DMC-A that disappears are as follows:

The tensio-active agent of the polyethenoxy ether class of wherein contain-NH group is amino dodecane polyoxyethylene [5-15] ether, stearylamine polyoxyethylene [5-15] ether, tallow amine polyoxyethylene [5-20] ether and coco amine polyoxyethylene [5-30] ether, this component can neutralize the sticky ingredient of paint, possesses cleanup action simultaneously;

Alcohol ether solvent is ethylene glycol monomethyl ether, diethylene glycol dimethyl ether, ethylene glycol ethyl ether, butyl glycol ether, the only ether of Diethylene Glycol, Diethylene Glycol butyl ether, Polyethylene glycol dimethyl ether and propylene glycol monomethyl ether;

Modified polyether defoamer is polyethers GP330, polyethers GPE or the polyethers PPE with water drain silica modification.

The preparation method of the described stick DMC-A that disappears is: first prepare modified polyether defoamer, in closed reactor, add polyethers GP330, polyethers GPE or polyethers PPE, the water drain silica that adds polyethers weight 1-10% under stirring, be warming up to 80-150 ℃ of reaction 1-3 hour, cooling rear blowing, standby.At normal temperatures and pressures, in reactor, first add water, then in the ratio of the component of DMC-A and content, each material is added in still, stir and fully mix for 0.5-2 hour, standing blowing, packing.

The preparation method of described flocculation agent DMC-B is: in reactor, add water, then add after aluminium salt stirring and dissolving, the anionic polyacrylamide that molecular weight is 1,000 ten thousand, degree of hydrolysis is 20%-30% is added to the water to dissolving, stirs, be made into 0.5-2 ‰ aqueous solution.

In the present invention because the surface tension of solution is very little, the tensio-active agent of the polyethenoxy ether class of contain-NH group will produce a large amount of fine and close foams, traditional alcohols, organosilicon and polyether antifoam agent are not suitable for the elimination containing the tensio-active agent foam of the polyethenoxy ether class of-NH group, in the system of this low surface tension, use polyethers GP330, polyethers GPE or the polyethers PPE of water drain silica modification, can control the circulating water system excessive disadvantageous effect of a large amount of foams to sealing.

Technical characterstic of the present invention is: product adopts complex process under normal pressure, and preparation technology is simple, and its effective constituent is surfactant, and safety non-toxic is specially adapted to the painting wastewater processing that existing aircraft coating process produces.This medicament has very strong charge neutrality, can be promptly in and paint particles electric charge, make within a short period of time the organic composition of paint lose viscosity, and the paint particles that loses viscosity can be flocculated, in the present invention simultaneously, aluminium salt plays the effect of water purification.In aircraft sprays paint containing paint cascade workshop, add disappear stick DMC-A and flocculation agent DMC-B, can make more than 95% coating cloud in waste water be cleared up, protected Working environment and operator ' s health.

Specific embodiment

Embodiment 1

The preparation of modified polyether GP330: in closed reactor, add after 100g polyethers GP330, add the water drain silica of 5g, fully stir, be warming up to 80 ℃ of reactions 3 hours, cooling rear blowing, standby.

The preparation of stick DMC-A disappears: in reaction flask, adds 79g water, is sequentially added into 10g amino dodecane polyoxyethylene (10) ether, and 10g ethylene glycol monomethyl ether, 1g modified polyether GP330, stirs 2 hours, fully mixes standing blowing.

Embodiment 2

The preparation of flocculation agent DMC-B: first add 1000g water in reaction flask, first add 0.2g Tai-Ace S 150, after stirring and dissolving, adding 1g molecular weight is 1,000 ten thousand, the anionic polyacrylamide that degree of hydrolysis is 25, after stirring and dissolving is complete, blowing.

Embodiment 3

Application examples

In in 250ml tool plug graduated cylinder, add 100ml water, add 20% liquid sodium hydroxide, regulate the pH to 8 of the aqueous solution, add the 1g stick DMC-A that disappears, 2g flocculation agent DMC-B, splashes into suction pipe 10 of the paint that aircraft coating process uses, build bottle cap, fluctuate, observe the stickiness that paint drips.Medicament of the present invention can be removed paint stickiness, forms floss and floats on liquid level, and water quality is as clear as crystal, can make more than 95% coating cloud in waste water be cleared up.

Claims (1)

1. an aircraft coating process is crossed the method for making of spray paint water treatment agent, it is characterized in that: water treatment agent is by disappear stick DMC-A and the flocculation agent DMC-B stick DMC-A that disappears by weight: flocculation agent DMC-B=1 part: 1-3 part forms, and be mixed in the aqueous solution that 100 parts of liquid sodium hydroxides by 20% weight concentration regulate pH to 8-9 and make;

The described stick DMC-A that disappears consists of by a certain percentage tensio-active agent, alcohol ether solvent and the polyethers defoamer of the polyethenoxy ether class containing-NH group; Described flocculation agent DMC-B is comprised of at 1,000 ten thousand acylamide polymer solution and the mixing solutions of aluminium salt molecular weight;

Component and the weight percentage of the wherein said stick DMC-A that disappears are as follows:

The tensio-active agent of the polyethenoxy ether class of wherein contain-NH group is amino dodecane polyoxyethylene [5-15] ether, stearylamine polyoxyethylene [5-15] ether, tallow amine polyoxyethylene [5-20] ether and coco amine polyoxyethylene [5-30] ether, this component can neutralize the sticky ingredient of paint, possesses cleanup action simultaneously;

Alcohol ether solvent is ethylene glycol monomethyl ether, diethylene glycol dimethyl ether, ethylene glycol ethyl ether, butyl glycol ether, the only ether of Diethylene Glycol, Diethylene Glycol butyl ether, Polyethylene glycol dimethyl ether and propylene glycol monomethyl ether;

Modified polyether defoamer is polyethers GP330, polyethers GPE or the polyethers PPE with water drain silica modification;

The preparation method of the described stick DMC-A that disappears is: first prepare modified polyether defoamer, in closed reactor, add polyethers GP330, polyethers GPE or polyethers PPE, the water drain silica that adds polyethers weight 1-10% under stirring, be warming up to 80-150 ℃ of reaction 1-3 hour, cooling rear blowing, standby, at normal temperatures and pressures, in reactor, first add water, then in the ratio of the component of DMC-A and content, each material is added in still, stir and fully mix for 0.5-2 hour, standing blowing, packing;

The preparation method of described flocculation agent DMC-B is: in reactor, add water, then add after aluminium salt stirring and dissolving, the anionic polyacrylamide that molecular weight is 1,000 ten thousand, degree of hydrolysis is 20%-30% is added to the water to dissolving, stirs, be made into 0.5-2 ‰ aqueous solution.