CN101812386B - Production method of washing powder containing pH sensitive raw material - Google Patents
Production method of washing powder containing pH sensitive raw material Download PDFInfo
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- CN101812386B CN101812386B CN2010101489765A CN201010148976A CN101812386B CN 101812386 B CN101812386 B CN 101812386B CN 2010101489765 A CN2010101489765 A CN 2010101489765A CN 201010148976 A CN201010148976 A CN 201010148976A CN 101812386 B CN101812386 B CN 101812386B
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Abstract
The invention discloses a production method of washing powder containing a pH sensitive raw material, which comprises the following steps that: (1) blending: washing powder raw materials are measured to configure washing powder slurry; and a pH sensitive raw material is measured to prepare a pH sensitive raw material slurry; (2) atomizing and drying: the washing powder slurry and the pH sensitive raw material slurry are conveyed into an atomizing drying tower respectively through a pipeline and a high-pressure pump to be undertaken the atomizing and drying treatment so as to obtain the washing powder base powder and the pH sensitive base powder, and the washing powder base powder and the p H sensitive base powder are mixed under the effect of the reverse-flowing hot air inside the atomizing drying tower. The washing powder slurry and the pH sensitive raw material slurry are respectively configured, and the washing powder slurry and the pH sensitive raw material slurry are conveyed into the atomizing drying tower to be atomized and dried and to be mixed under the effect of the reverse-flowing hot air inside the atomizing drying tower, so the productivity is greatly improved.
Description
Technical field
The present invention relates to a kind of production method of washing powder, relate in particular to a kind of production method of washing powder of the pH of containing sensitive raw material.
Background technology
Along with development of science and technology, the tensio-active agent with superperformance of some environmental protection continues to bring out, and they have excellent soil removability, lime soap dispersing power, low irritant and favorable biological degradability.Compare with traditional tensio-active agent of present use, on cost performance, possess suitable advantage, in the daily use chemicals industry, can be used for substituting tensio-active agent such as existing oil by product linear alkylbenzene sulphonic acid and be applied in washing composition and the personal care articles.Yet some stable non-constant under high temperature, high alkalinity condition in these tensio-active agents, as the pH sensitive raw material, therefore facile hydrolysis under high temperature, high alkalinity condition in washing powder is produced, can only be applied in back allotment of labor's preface of washing powder.For example, pH sensitive surfactant---alpha-sulfo-fatty acid alkyl ester salt, facile hydrolysis under high temperature, high alkalinity condition, usually all be to adopt back allotment of labor's skill, promptly elder generation prepares the washing powder original washing powder respectively and alpha-sulfo-fatty acid alkyl ester salt is pulverized, the two mixes in the fit system of back compounding according to ratio more then, finally obtains finished product.But the uneven problem of granular size appears in powdered alpha-sulfo-fatty acid alkyl ester salt easily in crushing process, causes the quality product fluctuation big.A kind of treatment process of alpha-sulfo-fatty acid alkyl ester salt is disclosed at Chinese invention patent application CN 200810220050.5: prepare the alpha-sulfo-fatty acid alkyl ester salt detergent composition earlier, then alpha-sulfo-fatty acid alkyl ester salt detergent composition and original washing powder are mixed in the fit system of back compounding according to certain proportion, finally obtain finished product.Though aforesaid method can solve the problem of granular size inequality in the crushing process preferably, but and since traditional washing powder spray drying system have only one the cover dosing unit, usually can only be to prepare the washing powder original washing powder respectively and contain pH sensitive raw material original washing powder, the two is again according to ratio then, join raw material after adding other again, in mixing equipment, mix, finally obtain finished product.Whole production complex process not only, production unit and manpower requirement are big, and the production time is long, has increased production cost, and the pH sensitive raw material component in the finished product can not guarantee to be evenly distributed in the washing powder original washing powder fully.Again for example, polyoxyethylenated alcohol sodium sulfate (AES), under high temperature and overbasic environment, the possibility that also has hydrolysis, but because commercially available AES is essentially the liquid of 24% content and the paste of 70% content at present, directly use in the allotment of labor's skill of back to cause moisture content of finished products content to increase, thereby increase the risk of product caking.
Summary of the invention
The purpose of this invention is to provide a kind of pH of containing sensitive raw material production method of washing powder.
The objective of the invention is to realize by following technical measures: a kind of production method of washing powder of the pH of containing sensitive raw material, it is characterized in that, may further comprise the steps:
(1) batching: take by weighing detergent raw material preparation washing powder slurry; Take by weighing pH sensitive raw material preparation pH sensitive raw material slurry;
(2) spraying drying: the responsive slurry of washing powder slurry and pH is transported to through corresponding pipeline and high-pressure pump separately respectively carries out spray drying treatment in the spray-drying tower, obtain the responsive original washing powder of washing powder original washing powder and pH, and in spray-drying tower, under the effect of warm air, finish the mixing of two kinds of powders.
The present invention can do following improvement: in step (2) washing powder slurry and pH sensitive raw material slurry carried out respectively being transported to through corresponding pipeline and high-pressure pump separately after slurry is handled again and carry out spray drying treatment in the spray-drying tower.Slurry after treatment can be more even, fine and smooth, and strengthened the flowability of slurry.
It can be the filtration treatment step that described slurry is handled, or degassing treatment step, or milled processed step, or filtration treatment step and milled processed step, or filtration treatment step and degassing treatment step, or degassing treatment step and milled processed step, or filtration treatment step, degassing treatment step and milled processed step.
The present invention can also do further improvement: the described washing powder slurry in step (2) is delivered to high-pressure pump through low-pressure pump earlier, and then is delivered to spray-drying tower by high-pressure pump; The described pH of containing sensitive raw material slurry is delivered to high-pressure pump through low-pressure pump earlier, and then is delivered to spray-drying tower by high-pressure pump.
By at least two cover spray gun loops are set, the spray gun loop is by being installed in the spray gun on the ring main and constituting with the nozzle of its coupling in the described spray-drying tower.
Because it is identical with pressure at pipe diameter, under the identical situation of slurry total solids, the ratio of nozzle operation quantity approaches the ratio of two kinds of components, therefore the present invention can also further improve: by at least two cover spray gun loops are set, the spray gun loop is by being installed in the spray gun on the ring main in the drying tower and constituting with the nozzle of its coupling in described spray-drying tower; When step (2) is carried out spraying drying, control the nozzle operation quantity on the spray gun loop of the conveying washing powder slurry in the spray-drying tower respectively and carry the ratio of the nozzle operation quantity on the spray gun loop that contains pH sensitive raw material slurry, regulate in the finished product washing powder original washing powder and contain the ratio of pH sensitive raw material original washing powder, thereby reach the requirement of formula for a product.
And because identical in nozzle operation quantity, pipe diameter is identical, under the identical situation of slurry total solids, transfer pressure is directly proportional with flow, the ratio of the pressure of pump equals the ratio of two kinds of components, therefore, the present invention can also be when step (2) carry out spraying drying, identical in nozzle operation quantity, pipe diameter is identical, under the identical situation of slurry total solids, regulates the ratio between the pressure of the pressure of the high-pressure pump of carrying washing powder slurry and the high-pressure pump that conveying contains pH sensitive raw material slurry, regulating in the finished product washing powder original washing powder and to contain the ratio of pH sensitive raw material original washing powder, thereby reach the requirement of formula for a product.
The transfer pressure of described high-pressure pump is 2.0～8.0Mpa, is preferably 3.5～6.5Mpa.
Described step (2) adopts reverse-flow spray-drying process to washing powder slurry with contain pH sensitive raw material slurry and carry out drying.
When carrying out spraying drying in described step (2), the hot blast inlet temperature of spray-drying tower is 300～450 ℃, preferred 320～380 ℃; The hot-blast outlet temperature of spray-drying tower is 80～150 ℃, preferred 90～120 ℃.
The nozzle diameter of the spray gun loop in the described spray-drying tower is 1.75～3.50mm.The diameter of nozzle can be selected according to practical condition and to the difference requirement of product, and is used with spray pressure.As a rule, nozzle bore is big more, and pressure is more little, and atomization particle is big more, and the product bulk specific gravity is low more.
Described at least two cover spray gun loops are arranged on the same horizontal plane.Perhaps described at least two cover spray gun loops are separately positioned on two or more horizontal planes that are parallel to each other.Because number of nozzle on the spray gun loop and the spacing of respectively overlapping between spray gun are relevant with the diameter and the output of tower, so determine according to the production needs of reality usually, can be entirely even covering of drop institute of atomizing as long as guarantee the cross section in the tower, the slurry drop is closely contacted with hot blast, obtain maximum heat effect and get final product.
Described being on two or more horizontal planes that are parallel to each other respectively overlapped in the spray gun loop, and a cover that is in below is apart from least 14 meters of the hot blast imports of spray-drying tower.
The present invention compared with prior art has following unusual effect:
1. the present invention prepares respectively washing powder slurry and pH sensitive raw material slurry, and washing powder slurry and pH sensitive raw material slurry are transported to carry out spraying drying in the spray-drying tower simultaneously, and finish the two mixing under the hot air acting of the adverse current in drying tower, production efficiency is greatly enhanced.
2. owing to respectively washing powder slurry and pH sensitive raw material slurry are carried, can be by regulating high-pressure pump or the pressure of shurry pump and the nozzle operation quantity on the spray gun loop in the spray-drying tower in the dosing unit, control the component ratio of the finished product, reach the prescription of expectation.Generally identical in nozzle operation quantity, the diameter of transfer lime is identical, and under the identical situation of slurry total solids, pressure is directly proportional with flow, and the pressure ratio of pump equals the ratio between washing powder and two kinds of components of pH sensitive raw material.If the pressure at the diameter of transfer lime and pump is identical, under the identical situation of slurry total solids, the ratio of nozzle operation quantity equals the ratio between washing powder and two kinds of components of pH sensitive raw material.
3. method production provided by the invention contains the washing powder of pH sensitive raw material, the even particle size of pH sensitive raw material powder, outward appearance, physical parameter are consistent with washing powder, can be evenly distributed in the ratio of actual needs in the washing powder, avoid causing the problem of unstable product quality, improve the quality of product through the granular size inequality of pulverous pH sensitive raw material of mechanical disintegration.And to the pH sensitive raw material spraying drying is carried out in dissolving earlier again, can effectively control the bulk specific gravity of pH sensitive raw material powder, make the bulk specific gravity of washing powder and pH sensitive raw material powder close, avoided the layering of product, guarantee the stable of product.
4. because method provided by the invention is prepared washing powder slurry and pH sensitive raw material slurry respectively, and be delivered to spray-drying tower with different pipelines and high-pressure pump and carry out drying, therefore can be according to formula for a product, processing requirement respectively to washing powder slurry or contain pH sensitive raw material slurry various processes and adjust.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of washing powder production unit of the present invention.
Embodiment
In following examples with the pH sensitive raw material---alpha-sulfo-fatty acid alkyl ester salt is that example is described in detail content of the present invention, but no matter from which point, following embodiment of the present invention all can only be thought explanation of the present invention rather than restriction, therefore any change that can realize the object of the invention in implication suitable with claims of the present invention and scope all should be thought to be included in the scope of claims.
Contain anion surfactants such as LAS, AOS in the conventional washing powder slurry described in following examples, water glass, soda ash, whitening agent, Sodium sulfate anhydrous.min(99), zeolite, anti redeposition agent, water-softening chemicals, slurry amendment etc., they get final product according to conventional ratio batching, and slurry temperature is controlled at 45～75 ℃.
And the temperature of slurry that contains alpha-sulfo-fatty acid alkyl ester salt is below 80 ℃, and the temperature that preferably keeps slurry is at 55 ℃～75 ℃.This contains in the slurry of alpha-sulfo-fatty acid alkyl ester salt and contains alpha-sulfo-fatty acid alkyl ester salt and inorganic salt, pH is 5.0～10.5, described inorganic salt are selected from basic metal inorganic salt, alkaline-earth metal inorganic salt and their mixture, can also contain anion surfactants such as LAS, AOS, whitening agent, zeolite, anti redeposition agent, water-softening chemicals, slurry amendment etc. can add or adjust according to producing needs or prescription demand.
The general formula of above-mentioned alpha-sulfo-fatty acid alkyl ester salt is:
The washing powder production unit that uses in following examples:
As shown in Figure 1, a kind of production unit of washing powder of pH sensitive raw material, this equipment contains pH sensitive raw material slurry dosing unit by a spray-drying tower 1, the conventional washing powder slurry dosing unit of a cover, a cover and two cover slurry treatment unit constitute.Spray gun loop 3 and spray gun loop 4 are set in the tower, and the two is in respectively on two parallel horizontal planes, and the spray gun loop 4 that is in below is at least 14 meters apart from the hot blast import of spray-drying tower.Spray gun loop 3 is connected with tower corresponding slurry treatment unit outward respectively with spray gun loop 4.Conventional washing powder slurry dosing unit with wherein one overlap the slurry treatment unit and be connected, the discharge port of this slurry treatment unit is connected with the opening for feed of high-pressure pump with spray gun loop 3 by low-pressure pump.PH sensitive surfactant slurry dosing unit is connected with another set of slurry treatment unit, and the discharge port of this slurry treatment unit is connected with the opening for feed of high-pressure pump with spray gun loop 4 by low-pressure pump.Nozzle diameter on spray gun loop 3 and the spray gun loop 4 is 1.75～3.50mm.
Conventional washing powder slurry dosing unit is connected and composed by ingredients pot 5A and aging pot 11A.The slurry treatment unit of conventional washing powder slurry is connected and composed by high-pressure pump (not shown) and transfer lime successively by strainer 8A, de-aerator 9A and colloidal mill 10A, and the discharge port of colloidal mill 10A links to each other with spray gun loop 3 in the spray-drying tower 1 by high-pressure pump 6A transfer lime 7A.
PH sensitive surfactant slurry dosing unit is connected and composed by ingredients pot 5B and aging pot 11B.The slurry treatment unit of pH sensitive surfactant slurry is connected and composed by high-pressure pump (not shown) and transfer lime successively by strainer 8B, de-aerator 9B and colloidal mill 10B, and the output terminal of colloidal mill 10B links to each other by the spray gun loop 4 in high-pressure pump 6B transfer lime 7B and the spray-drying tower 1.
Strainer can be a strainer, also can be the series connection of many strainers.Strainer adopts conventional filter sieve, continuous filter or suction filter.
De-aerator can adopt a de-aerator, also can be the series connection of many de-aerators.De-aerator adopts conventional continuous degassing cylinder or centrifugal de-aerator.
Colloidal mill can adopt one, also can be the series connection of many colloidal mills.
The production unit of the washing powder of pH sensitive raw material of the present invention can also be adjusted the composition of equipment according to demand of practical production.As, strainer only is set, slurry only need pass through filtration treatment; De-aerator perhaps only is set, and slurry only need be handled through the degassing; Or shredder only is set, slurry only need pass through milled processed; Or strainer and de-aerator are set, slurry need be through filtering and degassing treatment step; Or de-aerator and shredder are set, slurry need be through the degassing and milled processed step; Or strainer and shredder are set, slurry need be through filtering and the milled processed step.
Spray gun loop more than two covers can also be set in drying tower, and the number of nozzle on the spray gun loop and respectively to overlap the spacing of spray gun loop relevant with the diameter and the output of tower, usually determine according to the production needs of reality, can be entirely even covering of drop institute of atomizing as long as guarantee the cross section in the drying tower, the slurry drop is closely contacted with hot blast, obtain maximum heat effect and get final product.
Embodiment one:
(1) batching:
Conventional washing powder slurry:
| Raw material | Consumption (%) |
| Linear alkyl benzene sulphonic acid | 19 |
| Industrial sodium hydroxide | 2.4 |
| Yellow soda ash | 14 |
| Water glass (100%) | 10 |
| Anhydrous sodium sulphate | Surplus |
A. add entry in ingredients pot 5A, start to stir, add industrial sodium hydroxide earlier and stir, add linear alkyl benzene sulphonic acid again, be stirred to both and neutralize fully and form even soup compound, add yellow soda ash, water glass then, surplus is supplied with anhydrous sodium sulphate.The total solids of slurry is 70 ± 2%, is the strong basicity slurry, and temperature is 45～75 ℃.Then slurry is delivered to aging pot 11A.
The alpha-sulfo-fatty acid alkyl ester salt slurry:
| Raw material | Form (%) |
| Alpha-sulfo-fatty acid alkyl ester salt | 5 |
| Anhydrous sodium sulphate | 93 |
| Citric acid | In right amount |
| Industrial sodium hydroxide | In right amount |
B. in ingredients pot 5B, add entry, start and stir and heating, alpha-sulfo-fatty acid alkyl ester salt is dropped among the ingredients pot 5B, (or in ingredients pot 5B, add hot water, alpha-sulfo-fatty acid alkyl ester salt is dropped among the ingredients pot 5B, water temperature is about 60 ℃), constantly stirring and keeping temperature is 60～65 ℃, after treating the alpha-sulfo-fatty acid alkyl ester salt dissolving, add anhydrous sodium sulphate, constantly be stirred to composite uniform sizing material, the weight percent of the total solid matters of slurry is about 70 ± 2%, and the maintenance slurry temperature is 60～65 ℃, the pH value of continuous test slurry in the whipping process, and regulate pH value of slurry with citric acid or sodium hydroxide and be about 6.5, stable up to the pH of slurry, and in 15 minutes, do not have considerable change.Then slurry is delivered to aging pot 11B.
(2) spraying drying: respectively with high-pressure pump with the pressure of 3.0～4.0Mpa with conventional washing powder slurry and alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 3.20mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle of moulding and the particle of alpha-sulfo-fatty acid alkyl ester salt mix under the effect of the warm air of adverse current.The hot blast inlet temperature is 320～380 ℃; Temperature out is 90～100 ℃.When carrying out spraying drying, according to the conventional washing powder original washing powder in the finished product of expection and the ratio of alpha-sulfo-fatty acid alkyl ester salt original washing powder, control the ratio of the quantity of the main jet on the spray gun loop of the quantity of the main jet on the spray gun loop of conventional washing powder slurry transfer line and alpha-sulfo-fatty acid alkyl ester salt slurry transfer line.
Embodiment two:
Different with embodiment one is:
Step (2) degassing is handled: conventional washing powder slurry is through de-aerator 9A processings that outgas, and the alpha-sulfo-fatty acid alkyl ester salt slurry passes through the de-aerator 9B processing that outgases.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 3.5～4.5Mpa with conventional washing powder slurry with contain the alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 2.50mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle of moulding and contain the alpha-sulfo-fatty acid alkyl ester salt particle and under the effect of the warm air of adverse current, mix.The hot blast inlet temperature is 300～380 ℃; Temperature out is 90～120 ℃.
Embodiment three:
Different with embodiment one is:
Step (2) degassing and milled processed: conventional washing powder slurry outgases and milled processed through de-aerator 9A and colloidal mill 10A, and the alpha-sulfo-fatty acid alkyl ester salt slurry outgases and milled processed through de-aerator 9B and colloidal mill 10B.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 4.5～5.5Mpa with conventional washing powder slurry and alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 3.20mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle and the alpha-sulfo-fatty acid alkyl ester salt particle of moulding mix under the effect of the warm air of adverse current.The hot blast inlet temperature is 320～350 ℃; Temperature out is 90～120 ℃.
Embodiment four:
Different with embodiment one is:
Step (2) filtration treatment: conventional washing powder slurry is carried out filtration treatment through strainer 8A, and the alpha-sulfo-fatty acid alkyl ester salt slurry carries out filtration treatment through strainer 8B.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 4.0～5.5Mpa with conventional washing powder slurry and alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 3.20mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle and the alpha-sulfo-fatty acid alkyl ester salt particle of moulding mix under the effect of the warm air of adverse current, obtain finished product.The hot blast inlet temperature is 320～380 ℃; Temperature out is 90～120 ℃.
Embodiment five:
Different with embodiment four is:
Step (2) is filtered, the degassing is handled: conventional washing powder slurry is through strainer 8A and the de-aerator 9A processing of filtering and outgas, the alpha-sulfo-fatty acid alkyl ester salt slurry is through strainer 8B and the de-aerator 9B processing of filtering and outgas, remove bigger material and the impurity of particle in the slurry, and remove the air of slurry.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 4.5～6.5Mpa with conventional washing powder slurry and alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 3.20mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle and the alpha-sulfo-fatty acid alkyl ester salt particle of moulding mix under the effect of the warm air of adverse current, obtain finished product.The hot blast inlet temperature is 320～360 ℃; Temperature out is 90～110 ℃.
Embodiment six:
Different with embodiment five is:
Step (2) filtration, the degassing and milled processed: conventional washing powder slurry is through strainer 8A, de-aerator 9A and colloidal mill 10A filters successively, the degassing and milled processed, the alpha-sulfo-fatty acid alkyl ester salt slurry is through strainer 8B, de-aerator 9B and colloidal mill 10B filters successively, the degassing and milled processed, remove bigger material and the impurity of particle in the slurry, and removing the air of slurry, that slurry becomes is more even, fine and smooth, possess good flowability.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 4.5～6.0Mpa with conventional washing powder slurry and alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 3.50mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle and the alpha-sulfo-fatty acid alkyl ester salt particle of moulding mix under the effect of the warm air of adverse current, obtain finished product.The hot blast inlet temperature is 310～370 ℃; Temperature out is 90～120 ℃.
Embodiment seven:
Different with embodiment one is:
Step (2) milled processed: conventional washing powder slurry is carried out milled processed through shredder 10A, and the alpha-sulfo-fatty acid alkyl ester salt slurry carries out milled processed through shredder 10B.
Step (3) spraying drying: respectively with high-pressure pump with the pressure of 5.5～7.0Mpa with conventional washing powder slurry with contain the alpha-sulfo-fatty acid alkyl ester salt slurry respectively through corresponding pipeline and high-pressure pump are transported to the cat head of spray-drying tower separately, nozzle diameter on spray gun loop 3 and spray gun loop 4 is the pressure nozzle atomizing of 1.75mm respectively then, being vaporific sprays in the tower, meet with the warm air of adverse current, carry out the counter current drying moulding.The conventional washing powder particle of moulding and contain the alpha-sulfo-fatty acid alkyl ester salt particle and under the effect of the warm air of adverse current, mix.The hot blast inlet temperature is 420～450 ℃; Temperature out is 140～150 ℃.
Claims (19)
1. a production method of washing powder that contains the pH sensitive raw material is characterized in that, may further comprise the steps:
(1) batching: take by weighing detergent raw material preparation washing powder slurry; Take by weighing pH sensitive raw material preparation pH sensitive raw material slurry;
(2) spraying drying: the responsive slurry of washing powder slurry and pH is transported to through corresponding pipeline and high-pressure pump separately respectively carries out spray drying treatment in the spray-drying tower, obtain the responsive original washing powder of washing powder original washing powder and pH, and in spray-drying tower, under the effect of the warm air of adverse current, finish the mixing of two kinds of powders;
By at least two cover spray gun loops are set, the spray gun loop is by being installed in the spray gun on the ring main in the drying tower and constituting with the nozzle of its coupling in the described spray-drying tower; When step (2) is carried out spraying drying, control the nozzle operation quantity on the spray gun loop of the conveying washing powder slurry in the spray-drying tower respectively and carry the ratio of the nozzle operation quantity on the spray gun loop that contains pH sensitive raw material slurry, regulate washing powder original washing powder and the ratio that contains pH sensitive raw material original washing powder in the finished product.
2. the production method of washing powder that contains the pH sensitive raw material according to claim 1, it is characterized in that, in step (2), washing powder slurry and pH sensitive raw material slurry carried out respectively being transported to through corresponding pipeline and high-pressure pump separately after slurry is handled again and carry out spray drying treatment in the spray-drying tower.
3. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that described slurry is treated to the filtration treatment step.
4. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that described slurry is treated to degassing treatment step.
5. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that described slurry is treated to the milled processed step.
6. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that, described slurry is treated to filtration treatment step and milled processed step.
7. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that, described slurry is treated to filtration treatment step and degassing treatment step.
8. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that, described slurry is treated to degassing treatment step and milled processed step.
9. the production method of washing powder that contains the pH sensitive raw material according to claim 2 is characterized in that, described slurry is treated to filtration treatment step, degassing treatment step and milled processed step.
10. according to the described production method of washing powder that contains the pH sensitive raw material of the arbitrary claim of claim 1～9, it is characterized in that, described washing powder slurry in step (2) is delivered to high-pressure pump through low-pressure pump earlier, and then is delivered to spray-drying tower by high-pressure pump; The described pH of containing sensitive raw material slurry is delivered to high-pressure pump through low-pressure pump earlier, and then is delivered to spray-drying tower by high-pressure pump.
11. the production method of washing powder that contains the pH sensitive raw material according to claim 10 is characterized in that, the transfer pressure of described high-pressure pump is 2.0～8.0Mpa.
12. the production method of washing powder that contains the pH sensitive raw material according to claim 11 is characterized in that, the transfer pressure of described high-pressure pump is 3.5～6.5Mpa.
13. the production method of washing powder that contains the pH sensitive raw material according to claim 12 is characterized in that, described step (2) adopts reverse-flow spray-drying process to washing powder slurry with contain pH sensitive raw material slurry and carry out drying.
14. the production method of washing powder that contains the pH sensitive raw material according to claim 13 is characterized in that, when carrying out spraying drying in described step (2), the hot blast inlet temperature of spray-drying tower is 300～450 ℃, and temperature out is 80～150 ℃.
15. the production method of washing powder that contains the pH sensitive raw material according to claim 14 is characterized in that, described hot blast inlet temperature is 320～380 ℃; Described temperature out is 90～120 ℃.
16. the production method of washing powder that contains the pH sensitive raw material according to claim 15 is characterized in that, the nozzle diameter of the spray gun loop in the described spray-drying tower is 1.75～3.50mm.
17. the production method of washing powder that contains the pH sensitive raw material according to claim 16 is characterized in that, described at least two cover spray gun loops are arranged on the same horizontal plane.
18. the production method of washing powder that contains the pH sensitive raw material according to claim 17 is characterized in that, described at least two cover spray gun loops are separately positioned on two or more horizontal planes that are parallel to each other.
19. the production method of washing powder that contains the pH sensitive raw material according to claim 18, it is characterized in that, described being on two or more horizontal planes that are parallel to each other respectively overlapped in the spray gun loop, and a cover that is in below is apart from least 14 meters of the hot blast imports of spray-drying tower.
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| CN103480297B (en) * | 2013-09-23 | 2016-01-06 | 安徽安庆南风日化有限责任公司 | A kind of energy-saving and cost-reducing washing powder production line |
| CN112795435A (en) * | 2020-12-31 | 2021-05-14 | 重庆可卡日用化工有限公司 | Preparation method of powdery detergent |
| CN113293062A (en) * | 2021-06-09 | 2021-08-24 | 汕头市澄丽日化用品有限公司 | Preparation method of base material and preparation method of fragrance-retaining beads |
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|---|---|---|---|---|
| CN101440331A (en) * | 2008-12-16 | 2009-05-27 | 广州市浪奇实业股份有限公司 | Composition for detergent and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2027518A1 (en) * | 1990-10-03 | 1992-04-04 | Richard L. Tadsen | Process for preparing high density detergent compositions containing particulate ph sensitive surfactant |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440331A (en) * | 2008-12-16 | 2009-05-27 | 广州市浪奇实业股份有限公司 | Composition for detergent and use thereof |
Non-Patent Citations (1)
| Title |
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| 范伟莉等.脂肪酸甲酯磺酸钠在洗涤剂中的应用性能研究.《应用化工》.2008,第37卷(第7期),第830-833页. * |
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