CN101791593A - Horizontal screw centrifugal machine for solid-liquid separation of pectin and use method thereof - Google Patents

Horizontal screw centrifugal machine for solid-liquid separation of pectin and use method thereof Download PDF

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CN101791593A
CN101791593A CN201010120737A CN201010120737A CN101791593A CN 101791593 A CN101791593 A CN 101791593A CN 201010120737 A CN201010120737 A CN 201010120737A CN 201010120737 A CN201010120737 A CN 201010120737A CN 101791593 A CN101791593 A CN 101791593A
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pectin
horizontal screw
rotary drum
solid
screw centrifuge
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CN101791593B (en
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谢保明
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Anhui Yuning Pectin Co ltd
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Dangshan Yuning Biological Technology Co Ltd
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Abstract

The invention belongs to the field of centrifugal machines, in particular to a horizontal screw centrifugal machine for the solid-liquid separation of pectin and a use method thereof. The horizontal screw centrifugal machine comprises a drum, wherein the internal diameter of the bigger end of the drum is 220-430 mm, the length of the drum is 1100-1550 mm, the diameter of the feeding hole of the drum is 40-50mm, and the screw pitch gradient is 8-13 degrees. By adopting the horizontal screw centrifugal machine to carry out pectin separation, firstly, the production cost can be saved, and the labor intensity of workers can be reduced; secondly, the separation effect can be improved, and the effective yield of the pectin can be improved; and thirdly, the separation equipment, the sanitary environment and the cleaning standard all reach the national sanitary standard. In the invention, the pectin obtained by separation has light milk-white appearance, higher effective component content of solid and very obvious solid-liquid separation effect. The moisture content of the separated pectin is about 40 percent, which is convenient for drying in the next step. In addition, the content of the pectin which is taken away is very low so that the wastage is little.

Description

A kind of horizontal screw centrifuge and using method that is used for the pectin Separation of Solid and Liquid
[technical field]
The invention belongs to the centrifuge field, more particularly, is a kind of horizontal screw centrifuge and using method that is used for the pectin Separation of Solid and Liquid.
[background technology]
Pectous extracting method at first is the pectin extraction: pomace is immersed pH value 1-3, temperature 25-100 ℃, react 30min-5h in the deionized water solution of 10-20 umber, make the pectin stripping that is present in pomace cell membrane intermediate layer, carry out Separation of Solid and Liquid by solid-liquid separating equipment then, pectin and pomace are separated, entered into next link again.
Solid-liquid separating equipment commonly used has tripod pendulum type batch centrifugal and plate and frame filter press.Tripod pendulum type batch centrifugal is equivalent to washing machine, at first will be with the open and flat centrifugal basket of spreading out of cotton system/chemical fibre filter bag of certain tolerable temperature and footpath weft density, squeeze into pectin slag liquid mixture material with slush pump then, starter motor, under the action of the centrifugal, liquid sees through filter bag cloth eye and the rotating cylinder mesh throws away, and the solid matter pomace then combines in the filter bag that is attached on the wall of limit.Tripod pendulum type batch centrifugal, its rotating cylinder diameter is big more, and charge is also many more, but rotating speed is low more. and industrial production generally adopts diameter 800/1000/1200mm, and their rotating speed is respectively 1200/1000/800r/min, about the about 200L of maximum volume.
Plate and frame filter press is filtered the dregs of a decoction with cloth after being similar to and having fried in shallow oil Chinese medicine, its operation principle is by the pressure of screw pump slag liquid water slurry to be filtered successively to be squeezed into filter chamber between the deckle board, the filter cloth that makes clear liquid see through deckle board two side suspensions with the pressure of screw pump flows out from deckle board fovea superior projection mortise, treat that chamber is full of stability hydraulic when 6-7kg left and right sides certain hour leaches the clear liquid flow simultaneously and reduces to a certain degree, hydraulic pressure release-close down material pump-return top board-draw back deckle board shake filter cloth filter cake to come off.
Tripod pendulum type batch centrifugal because separate and discharging longer when accounting for, change operation so factory once must drop into the number chaptrel; Filter bag also will in time clean replacement simultaneously, and cleaning filter cloth incessantly also needs industry washer to finish certainly; Be exactly that the little needs of batch processed amount frequently load and unload filter bag in addition, the one, enterprises using the labor many two is that labour intensity is big; Even in the process of so artificial replacing filter bag, often contact high-temperature material employee's scald accident still may take place unless you give your whole attention to it.
Pectin production uses plate and frame filter press to have following problem: one, the deckle board cavity volume is limited, one produce per year 50 tons the pectin line only washery slag extract workshop section, plate width of cloth 600*600/800*800/1000*1000mm, 60-80 square of deckle board filter press quantity is at least more than 4, and filter cake is collected and need be built 120m for convenience simultaneously 2* 1. the 5m platform takes up an area of many 2. investments greatly; Two, pectin solidliquid mixture viscosity is big, and the filter cloth regeneration difficulty is except that needs allied industry washing machine, and cleaning filter cloth 1. is that 2. the increasing of water consumption can cause secondary pollution.Three, chamber cloth and pressurize are filtered consuming time longer, 1. filtrate contacts with air for a long time, and the easy oxidation of aldehydes matter produces brown stain, and the gloomy commodity color of pectin outward appearance is very grave, 2. overtime reaction disconnects the macromolecule polysaccharide side chain, badly influences important quality index such as the gel degree of product and viscosity.
[summary of the invention]
Technical problem to be solved by this invention is horizontal screw centrifuge is applied in the pectous extracting method, a kind of horizontal screw centrifuge that is used for the pectin Separation of Solid and Liquid is provided, compare with existing equipment, can increase separating effect, improve the pectin slag liquid separating method of the effective yield of pectin, save production cost, reduce working strength of workers.
The present invention solves the problems of the technologies described above by the following technical programs: a kind of horizontal screw centrifuge that is used for the pectin Separation of Solid and Liquid, described horizontal screw centrifuge comprises rotary drum, it is characterized in that the big end interior diameter of described rotary drum is 220~430mm, described rotary drum length is 1100~1550mm, described rotary drum charging aperture diameter is 40~50mm, and the pitch gradient is 8~13 °.
The using method of described horizontal screw centrifuge may further comprise the steps:
A. the slag liquid separation phase that extracts of pectin: get 1: 20 pectin stoste of solid-liquid ratio with the big end interior diameter of rotary drum 430mm, length 1400mm, rotary drum charging aperture diameter 50mm, the horizontal screw centrifuge that the pitch gradient is 10~13 ° separates 20min under the 4200-4500r/min rotating speed;
B. the extraction stages extracted of pectin: will use the horizontal screw centrifuge identical under the 2500-2700r/min rotating speed, to separate 60min through the thick product of pectin of slag liquid separation with step a;
C. pectin precipitating stage of extracting: the alcohol that in through the thick product of pectin that concentrates, adds a certain amount of 95% concentration, stir after adding an amount of hydrochloric acid then, make its PH at 3.5-4.0, the limit adds an amount of fructose concentrating liquid limit stirring then, the alcoholic strength that makes mixed liquor is about 60%, solid-liquid ratio reaches 1: 1.5, again with the big end interior diameter of rotary drum 220mm, length 1100mm, rotary drum charging aperture diameter 40mm, the horizontal screw centrifuge that the pitch gradient is 8~11 ° separates 10min under the 3500-3900r/min rotating speed;
D. the rinse stage that extracts of pectin: the alcohol that adds a certain amount of 95% concentration at the thick product of pectin through precipitating, add the pectin for the treatment of rinsing then while stirring, the alcoholic strength of mixed liquor is reached about 65%, solid-liquid ratio reaches 1: 1.1, under the 4000-4200r/min rotating speed, separate 10min with the horizontal screw centrifuge identical with step c, through drying, pulverizing, sieve, mix, promptly obtain the pectin finished product again.
Principle of the present invention is: horizontal screw centrifuge is the density contrast that relies on the solid-liquid two-phase, and under action of centrifugal force, the sinking speed of accelerating solid phase particles realizes Separation of Solid and Liquid.Because the sedimentation of suspension, the conveying of sediment and dehydration are all finished in rotary drum.Therefore the rotary drum parts are critical pieces of horizontal screw centrifuge.The structure of rotary drum, material, shape and parameter have determined the characteristics and the technological effect of centrifuge to a great extent.Not only be related to the safety of structure problem of centrifuge, but also be related to sediment conveying, the separating effect of centrifuge.The seriation of centrifuge is that the maximum inner diameter with rotary drum is that major parameter is formulated.Along with the raising of centrifuge unit production capacity, its design is just higher towards rotating speed, and the direction that diameter is bigger develops.The ess-strain problem of drum structure is more outstanding.Under the preceding topic that solves the ess-strain problem, the rotary drum group is carried out Analysis of Parameters and optimization, improve the separating effect of centrifuge, alleviate quality, reduce cost concerning horizontal screw centrifuge, have the important project practical significance.Adopt existing tripod pendulum type batch centrifugal to carry out pectin with the deckle board filter press and separate the pectin Separation of Solid and Liquid, backward in technique, technology imperfection, separation equipment are unhygienic, and environmental index does not reach the sanitation and hygiene standard; And take the horizontal screw centrifuge isolation technics, one can save production cost, and reduces labor strength; Two can increase separating effect, improve the effective yield of pectin; Three separation equipments, hygienic conditions and cleanliness standard reach state health standards.
The invention has the advantages that: centrifuge parameters of the present invention is through experiment repeatedly, the preferred plan that obtains after the optimization, adopt described horizontal screw centrifuge, the pectin outward appearance that separation is obtained is light ecru, the solid active constituent content is higher, the effect of Separation of Solid and Liquid is very obvious, and isolated pectin water content is about 40%, is convenient to next step bake drying; The content of the pectin of taking away simultaneously is very low, and loss is few.
[description of drawings]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the process for producing pectin flow chart.
[specific embodiment]
Referring to subordinate list one, horizontal screw centrifuge of the present invention is made up of parts such as rotary drum, auger conveyor, differential mechanism, base bearing, underframe, liquid-solid phase collecting chamber, loam cake, transmission gear for electric motor, frequency converters.The big end interior diameter of described rotary drum is 220~430mm, and described rotary drum length is 1100~1550mm, and described rotary drum charging aperture diameter is 40~50mm, and the pitch gradient is 8~13 °.Rotary drum pattern: cylinder-pyramid type, spiral pattern: single head, left-handed, leading, cone angle: 2 * 8 °, rotary drum rotating speed: 0~4500r/min is stepless adjustable, maximum separation factor: 2678g, rotary drum and spiral difference rotating speed: frequency conversion, stepless adjustable, 6 grades of overflow plate diameter: φ 199~φ 217 minutes are adjustable, disposal ability: in suspension, 2~10m/h is because the material performance difference, under the same conditions, disposal ability can have bigger difference, power of motor: 15kw. complete machine weight: about 1900kg, appearance and size: 2790 * 1300 * 950mm (length * wide * height).
The operation principle of this machine is: the spiral shell that crouches passes through progressively raising speed of frequency converter, and under the drive of primary and secondary belt wheel, the power shaft of rotary drum and differential mechanism reaches rated speed n 1, n 2, owing to the effect of differential mechanism, make the stable poor rotating speed Δ n of a leading rotary drum of spiral generation, to realize the screw unloading function; The design of rotary drum the place ahead has an awl section, according to the difference of material properties, rotates at a high speed according to the speed of setting.Machine rotational speed is stablized rear suspension liquid by head tank or feed pump, flow control valve, feed pipe enters centrifuge, quicken bucket through spiral and quicken to advance in the rotary drum again, under powerful effect of centrifugal force, heavy solid phase particles is got rid of on the sedimentation wall, and deposit to very soon on the inwall of rotary drum, through the promotion of spiral, sediment constantly is pushed to the rotary drum small end, collects case from slag notch through solid phase and discharges.Further clarification is by the rotary drum spout hole through separate blade for clear liquid after the separation, and liquid phase is collected case and discharged.Suspension is constantly imported in whole separation process, and the liquid phase and the sediment of clarification are constantly discharged, and therefore is to separate automatically continuously.
Referring to Fig. 1, extract the stages such as pectin generally comprises raw material processings, the separation of slag liquid, precipitating, smart filter, concentrated, precipitating, rinsing, oven dry, pulverizes, sieves, mixing, below be the embodiment of the application of described horizontal screw centrifuge in pectous extracting method:
Pectin precipitating: the alcohol that in through the thick product of pectin that concentrates, adds a certain amount of 95% concentration, stir after adding an amount of hydrochloric acid then, make its PH at 3.5-4.0, the limit adds an amount of fructose concentrating liquid limit stirring then, the alcoholic strength that makes mixed liquor is about 60%, solid-liquid ratio reaches 1: 1.5, use the big end interior diameter of described rotary drum 220mm then, length 1100mm, described rotary drum charging aperture diameter 40mm, the horizontal screw centrifuge that the pitch gradient is 8~11 ° separates 10min under the 3500-3900r/min rotating speed.
Pectin rinsing: the alcohol that adds a certain amount of 95% concentration at the thick product of pectin through precipitating, add the pectin for the treatment of rinsing then while stirring, the alcoholic strength of mixed liquor is reached about 65%, solid-liquid ratio reaches 1: 1.1, under the 4000-4200r/min rotating speed, separate 10min with identical horizontal screw centrifuge then, through drying, pulverizing, sieve, mix, promptly obtain the pectin finished product again.Detail parameters is referring to subordinate list two.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claims and equivalent thereof.
Table one: be used for the horizontal screw centrifuge parameter that pectin extracts:
Slag liquid separates Extract Precipitating Rinsing
Roller diameter (mm) ??430 ??430 ??220 ??220
Rotary drum length (mm) ??1400 ??1400 ??1100 ??1100mm
Rotating speed r/min ??4200-4500 ??2500-2700 ??3500-3900 ??4000-4200
Slag liquid separates Extract Precipitating Rinsing
Charging aperture diameter mm ??50 ??50 ??40 ??40
Outlet pitch gradient ??10-13 ??10-13 ??8-11 ??8-11
Table two: be used for the horizontal screw centrifuge operational factor that pectin extracts:
Slag liquid separates Extract Precipitating Rinsing
Time min ??20 ??60 ??10 ??10
Total treating capacity ??2.6t ??2.6t ??325kg ??120kg
Solid-liquid ratio ??1∶20 ??1∶20 ??1∶1.5 ??1∶1.1
Unit treating capacity kg/h ??5000-4000 ??2600-4000 ??1200-1500 ??1500-1800

Claims (2)

1. horizontal screw centrifuge that is used for the pectin Separation of Solid and Liquid, described horizontal screw centrifuge comprises rotary drum, it is characterized in that the big end interior diameter of described rotary drum is 220~430mm, and described rotary drum length is 1100~1550mm, described rotary drum charging aperture diameter is 40~50mm, and the pitch gradient is 8~13 °.
2. the using method of the described horizontal screw centrifuge of claim 1 is characterized in that being may further comprise the steps:
A. the slag liquid separation phase that extracts of pectin: get 1: 20 pectin stoste of solid-liquid ratio with the big end interior diameter of rotary drum 430mm, length 1400mm, rotary drum charging aperture diameter 50mm, the horizontal screw centrifuge that the pitch gradient is 10~13 ° separates 20min under the 4200-4500r/min rotating speed;
B. the extraction stages extracted of pectin: will use the horizontal screw centrifuge identical under the 2500-2700r/min rotating speed, to separate 60min through the thick product of pectin of slag liquid separation with step a;
C. pectin precipitating stage of extracting: the alcohol that in through the thick product of pectin that concentrates, adds a certain amount of 95% concentration, stir after adding an amount of hydrochloric acid then, make its PH at 3.5-4.0, the limit adds an amount of fructose concentrating liquid limit stirring then, the alcoholic strength that makes mixed liquor is about 60%, solid-liquid ratio reaches 1: 1.5, again with the big end interior diameter of rotary drum 220mm, length 1100mm, rotary drum charging aperture diameter 40mm, the horizontal screw centrifuge that the pitch gradient is 8~11 ° separates 10min under the 3500-3900r/min rotating speed;
D. the rinse stage that extracts of pectin: the alcohol that adds a certain amount of 95% concentration at the thick product of pectin through precipitating, add the pectin for the treatment of rinsing then while stirring, the alcoholic strength of mixed liquor is reached about 65%, solid-liquid ratio reaches 1: 1.1, under the 4000-4200r/min rotating speed, separate 10min with the horizontal screw centrifuge identical with step c, through drying, pulverizing, sieve, mix, promptly obtain the pectin finished product again.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102286111A (en) * 2011-07-06 2011-12-21 砀山宇宁生物科技有限公司 Novel process for extracting pectin from pear skin at normal temperature
WO2019043035A1 (en) * 2017-08-31 2019-03-07 Südzucker AG Method for reducing the sugar loss in the removal of a coagulate from pre-liming juice and for thickening the coagulate, use of a decanter centrifuge, fraction containing protein, and sugar beet pre-liming juice

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1100899A (en) * 1993-09-28 1995-04-05 邵梦欣 Method for continuously extracting fruit juice-fruit pectin-edible fiber
CN1526738A (en) * 2003-09-23 2004-09-08 武汉化工学院 Method of preparing pectin with orange peel
US20070254795A1 (en) * 2006-04-26 2007-11-01 Hutchison Hayes L.P. Liner For a Centrifuge Discharge Port

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1100899A (en) * 1993-09-28 1995-04-05 邵梦欣 Method for continuously extracting fruit juice-fruit pectin-edible fiber
CN1526738A (en) * 2003-09-23 2004-09-08 武汉化工学院 Method of preparing pectin with orange peel
US20070254795A1 (en) * 2006-04-26 2007-11-01 Hutchison Hayes L.P. Liner For a Centrifuge Discharge Port

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102286111A (en) * 2011-07-06 2011-12-21 砀山宇宁生物科技有限公司 Novel process for extracting pectin from pear skin at normal temperature
CN102286111B (en) * 2011-07-06 2014-02-05 砀山宇宁生物科技有限公司 Process for extracting pectin from pear skin at normal temperature
WO2019043035A1 (en) * 2017-08-31 2019-03-07 Südzucker AG Method for reducing the sugar loss in the removal of a coagulate from pre-liming juice and for thickening the coagulate, use of a decanter centrifuge, fraction containing protein, and sugar beet pre-liming juice
JP2020531035A (en) * 2017-08-31 2020-11-05 ズートツッカー アーゲー How to reduce sugar loss when separating coagulum from pre-lime treated juice, and how to concentrate coagulated product, use decanter centrifuge, protein-containing fraction and pre-lime treated beet juice
US11702710B2 (en) 2017-08-31 2023-07-18 Sudzucker Ag Method for reducing the sugar loss in the removal of a coagulate from pre-liming juice and for thickening the coagulate, use of a decanter centrifuge, fraction containing protein, and sugar beet pre-liming juice
JP7374080B2 (en) 2017-08-31 2023-11-06 ズートツッカー アーゲー Method for reducing sugar loss during separation of coagulum from prelimed juice, as well as method for thickening coagulum, use of decanter centrifuges, protein-containing fractions and prelimed beet juice

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