CN109628649A - A kind of syrup high quality purification method - Google Patents

Abstract

The invention belongs to sugar industry technical fields, a kind of syrup high quality purification method are disclosed, especially for producing the syrup high quality purification method of low in acidity flocculate generation.Syrup first passes around pre- ash, heat treatment, then carries out low temperature aerosol clarification, and floating clear juice carries out stove drying neutralisation treatment after heating again, in stove drying and syrup carry out completion syrup after filtering whole juice processing without the peace and quiet process of sulphur.The purification method of syrup filtering whole juice after the method for the present invention mainly uses low temperature highly basic, stove drying to neutralize, make full use of non-sugar Wuli-Shili-Renli system approach in syrup, reunited to the full extent removing, realize the efficient process of clarifying syrup, apparatus and process is simple, facilitates automatic continuous production, significantly improve production efficiency, gained clear juice quality is high, better than the clear juice that traditional sulfurous method obtains, has a good application prospect.

Description

A kind of syrup high quality purification method

Technical field

The invention belongs to sugar industry technical fields, and in particular to a kind of syrup high quality purification method, in particular to one Plant the syrup high quality purification method for producing beverage high quality white sugar (low in acidity flocculate).

Background technique

Currently, sugar industry mainly uses three kinds of technique production plantation white sugars, i.e. carbonatation process, sulfurous method and raw sugar refining Method sugar refining technology.Carbonatation process sugar refining technology: due to generating a large amount of alkalinity CaCO₃Filter mud, processing is difficult, and discharge amount is big, gives ring Border pollutes, and limits its application.Sulfurous method sugar refining technology: putting long there are sugar products and return color, and ash content, insoluble matter impurity contain The problems such as amount is high, and acid flocculate risk is high, influences its application in soda, medicine and high-quality food.Raw sugar essence Refine then process route length, higher cost.Therefore, the requirement with sugar products standard and consumer to product quality is continuously improved, and passes The clarification process of sugar production of system is by huge challenge, it would be highly desirable to new juice,liming technique is found, to obtain the higher commerieal sugar of quality.

China's sugar industry research work is exploring always new clarification process research, to improve sugar products quality.

Chinese patent 00114236.4 discloses a kind of low-temp phosphorus floatation clarifying syrup new process, is arrived by the pre- ash of syrup PH7.0, after being heated to 40~60 DEG C, phosphoric acid, milk of lime, a small amount of formaldehyde, microbubble and flocculant is added and is carried out at air float Reason, it is subsequent that top grade white granulated sugar can be produced using conventional carbonatation process or sulfurous method sugar refining technology, but in neutral conditions The non-sugar removal rate such as organic acid, colloid, pigment is low；Chinese patent (application number) 200510035131.4 discloses one kind by sweet Sugarcane directly manufactures the technique of high quality white sugar, which uses low-temp phosphorus floatation method, and second step uses sulfurous acid decolorising agent One of three kinds of fining process, carbonation phosphorus float glass process and electrolysis method methods carry out clarifying syrup, and this method utilizes low temperature acid The Aggregation Characteristics of Proteins In Aqueous Solutions, but the non-sugar such as organic acid, reduced sugar decomposition product, pectin in syrup is in acid item Precipitating is not generated under part；Chinese patent (application number) 200610048758.8 discloses a kind of sub- with high efficiency active carbon for sugar improvement Sugared height is added in the juice for obtaining common sulfurous method clarifying treatment for the method that sulfuric acid process sugar refining technology produces sweetening sugar The preferable clear juice of quality is obtained by filters pressing, refined filtration after the effects of imitating active carbon, adsorbing desulfurization, for producing sweetening sugar, The color value of white granulated sugar finished product, turbidity, SO₂Etc. indexs can control better than within the scope of national standard reference；Chinese patent (application Number) 200710201374.X discloses a kind of low temperature processing technique for sugar mill mixing liquor by sulfurous acid method, this technique is used lower Quickly floating clear processing is carried out to sugarcane juice at temperature (45~65 DEG C)；Chinese patent (application number) 201210257567.8 discloses Without the method for sulphur white sugar, natural sugarcane juice only adds low-temperature and high-speed supernatant after flocculant for a kind of carbon method of resource circulation utilization --- Acid air float after heating, addition phosphoric acid, flocculant, fungicide, milk of lime --- floating juice addition milk of lime is heated to 103~105 DEG C, the high temperature carbonation of alkaline syrup is carried out, peace and quiet syrup is obtained, to produce without sulphur white sugar；Chinese patent (application number) 201310082816.9 discloses a kind of cane juice clarification method, floats clear separation method using part mixed juice system bubble, Mixed juice successively through it is pre- ash, level-one heating, system bubble, floating separating step handle to obtain floating juice, by the mixed juice of remaining part with Floating juice mixing, then juice is obtained through second level heating, stove drying neutralization, defeco-sulfitated juice heating, rapid subsidence step process, it can be reduced sugarcane The juice residence time improves the removal rate of non-sugar, stablizes juice pH value, avoids sedimentation basin " anti-bottom " and " sucrose inversion " phenomenon, Production cost is saved, is reduced environmental pollution, product quality is improved；Chinese patent 201510435534.1 discloses a kind of two-stage phosphorus It is floating that without sulphur Closed Circulation in Sugar Production technique, juice quality reaches traditional sulfitation process craft at present, but once floating temperature is higher for syrup, The non-sugar dissolution such as starch therein, colloid, still will cause the appearance of white granulated sugar product acidity flocculate.

Although the above prior art achieves good effect, but juice,liming or the processing of dross/mud juice compared with It is carried out under high-temperature, causes the non-sugar dissolution such as starch, colloid in syrup, product quality is applied higher-end businesses certain It is influenced in degree by acid flocculate, therefore, there is an urgent need to develop one kind can satisfy China arable land white granulated sugar in sugaring field The high quality white sugar of production --- the peace and quiet side of syrup high quality that the high quality white sugar that especially low in acidity flocculate generates produces Method solves the problems, such as that above-mentioned technology exists, change traditional carbonatation process or sulfitation process craft and deficiency.

Summary of the invention

In order to solve the disadvantage that the above prior art and shortcoming, the purpose of the present invention is to provide a kind of syrup is high-quality Measure purification method.

The object of the invention is achieved through the following technical solutions:

A kind of syrup high quality purification method, comprising the following steps:

(1) syrup pre-processes: adding milk of lime and phosphoric acid to syrup, total phosphorus acid value is in 200~450ppm in adjustment syrup Range, the control of syrup pH value are controlled in 8.5~11.5 ranges, primary heating temperature in 25~45 DEG C of ranges；

(2) syrup low temperature aerosol is clarified: pretreated syrup being divided into two parts, a part of syrup carries out bubble processed, system 1~5ppm of flocculant is added after syrup is mixed with another part syrup after bubble, is sufficiently reacted into coagulation reactor, it is sufficiently anti- The syrup answered is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating clear juice from floating device bottom juice yield tube Case, dross are collected to dross box, and air bearing process control is within 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 45~70 DEG C of ranges, carries out stove drying neutralization Processing, the control of syrup pH value is in 6.5~8.0 ranges, gained stove drying and syrup enters in stove drying and syrup case, neutralizes to stove drying The filter aid that syrup adds mass fraction 0~1% carries out filtering whole juice processing, and filtered juice is the peace and quiet syrup finally obtained, Filtered juice is collected to filtering syrup case, and the dross in filter mud and step (2) is mixed into mixing mud juice, obtains mixing mud juice；

(4) mixing mud juice processing: mixing mud juice carries out de- juice processing by vacuum suction filter, centrifuge or filter press, fills Divide the sugar in recycling mixing mud juice, the residual sugar in dry mud is down to 5 pols hereinafter, the filtered juice of abjection is individually handled or followed Ring processing, dry mud factory.

Preferably, total phosphorus acid value is 250~350ppm in syrup described in step (1)；The syrup pH value is through excessive The final control of secondary plus ash is 10.5~11.0, i.e., first plus ash is to pH value 8.5~9.0, then add ash to pH value 10.5~11.0； The primary heating temperature control is at 30~35 DEG C；The flocculant is polyacrylamide, biological flocculant, polyglutamic acid and changes One or more of property chitosan composition；

Preferably, air bearing process control described in step (2) is within 10min；

Preferably, the control of pH value described in step (3) is 7.2~7.5, and supernatant syrup heating and temperature control is 45~60 ℃；The filter aid is preferably one or more of diatomite, perlite, sugarcane chaff, wood powder and active carbon composition, grain Degree is in 10~1000 mesh；

Preferably, filtering whole juice described in step (3) is using UF membrane, filter press or vacuum suction filter, UF membrane 0.01~10 μm of filtering accuracy, the filtering accuracy of filter press and vacuum suction filter is 200~1000 mesh；

Preferably, the de- juice treatment process wash water temperature of mud juice is mixed described in step (4) less than 60 DEG C.

Preferably, independent processing described in step (4) refers to using filtered juice rapid subsidence system or the processing of filtered juice floating System or film separation system are individually handled；The circular treatment refers to the floating clear juice case or step of return step (2) (3) in stove drying and syrup case carries out circular treatment.

The process flow chart of syrup high quality purification method of the invention is as shown in Figure 1.

Technical principle of the invention:

The main component of sugarcane or beet syrup is sucrose, acid or alkaline condition, at a temperature of, can occur to turn Change, and syrup is the directly squeezing such as belt leather or exudation juice, syrup ingredient is extremely complex, mainly has: water, sucrose, reduced sugar, glue Body object (pectin, starch, polysaccharide etc.), amino acid, organic acid, pigment, protein, inorganic salts, lipid, enzyme etc. mention sucrose It is pure all to have an impact, it needs to fully consider its relationship that influences each other in clarifying process, gives full play to the beneficial effect of ingredient in syrup Fruit avoids precipitation, decomposition, conversion of component etc., such as isoelectric point, the double layer characteristic of colloid, organic acid and the nothing of protein Coagulation/property of retrogradation of machine salt etc., experimental studies have found that: in sucrose solution, temperature is lower, and non-sugar is more stable in syrup, Especially colloid substances are more not easy to dissolve out, as starch leaching temperature o'clock at 55 DEG C hereinafter, still under low temperature, acid condition be easy hair The pollution of raw microorganism causes the adverse consequences such as sugar decomposition, glucan production, although pH value is higher, colloid substances, protein etc. The cohesion of non-sugar is more complete, but under alkaline condition, monosaccharide is easily decomposed, and the coloring matter of syrup is caused to increase risk；Experiment It was found that syrup pH value by adding ash by several times, finally control is 10.5~11.5, since the electric double layer of colloid is anti-in pH value 8.5 or so PH value 11.0 or so is risen to again after answering a period of time, and the dehydration of colloid is more complete, and agglomerate is more solid.

Since Online Monitoring Control technical level before is limited and rapid subsidence technology, the syrup of syrup efficiently make bubble Have the defects that with syrup reunion coagulation technology certain, the residence time is longer in settler, floating device, the settler residence time About 60-90 minutes, the floating device residence time about 25-35 minutes, and floating-upward process system bubble, flocculation automatic control technology limitation, sugar Juice is easy to return that bottom, floating clear juice purification effect are lower, and in addition the compound settlement of alkaline mud is few, in addition to sugaring product Quality requirement according to the refined sugar of national standard, top grade sugar, level-one, second level Standard for Sugars produce, for special industry use Sugar --- white sugar that such as beverage industry need to use low in acidity flocculate --- carries out specific technique exploitation, causes in this programme Before, the low temperature highly basic technique of syrup is not dabbled.

Method of the invention have the following advantages that and the utility model has the advantages that

(1) clarifying syrup method of the invention, syrup filtering whole juice after being neutralized using low temperature highly basic air float, stove drying Purification method, the auxiliary agents such as no fungicide, formaldehyde are added, and at low temperature using highly basic bacteriostasis and air float are forced to handle, The effective non-sugar removed in syrup, entire cleaning technique process carry out at a lower temperature, avoid colloid, starch, albumen Matter etc. redissolves phenomenon, and clarifying syrup effect is good；

(2) clarifying syrup method of the invention, syrup the peace and quiet process air bearing residence time control 10~15min with Interior, 3~5min of filtering whole juice time, total residence time is 20~30min, and the syrup residence time is short, and Sucrose conversion is few, non- Sugar removal rate is high, and dross, mud juice take off juice system using vacuum suction filter, centrifuge or belt and directly handle, and sugar loss is few, The sugar yield that production can be increased improves the economic benefit of enterprise；

(3) it is dirty not will cause high alkalinity filter mud in 7.2~8.5 ranges for the filter mud pH value that peace and quiet process of the invention obtains Dye, and a variety of Organic nutrients such as P, K and protein, lipid are rich in filter mud, recycling deep development value is high；

(4) treated by means of the present invention, and clarifying syrup effect reaches or better than traditional carbonatation process and sulfurous method Peace and quiet effect: color value is stablized in 600~1100IU range, and turbidity is lower than 0.02% in 5~60MAU range, colloidal content, Syrup quality meets the requirement of production national standard top grade white granulated sugar, can be used for producing the high-quality of low in acidity flocculate generation White sugar product.

Detailed description of the invention

Fig. 1 is a kind of process flow chart of syrup high quality purification method of the invention.

Specific embodiment

Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.

Embodiment 1

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: adding milk of lime and phosphoric acid to syrup, total phosphorus acid value is in 350ppm, syrup in adjustment syrup PH value control adjusts pH value 11.0, using gradation plus grey form, i.e., first plus grey pH value control is 8.5, reacts 2 minutes, so Add grey pH value control 11.0 again afterwards, primary heating temperature is controlled at 35 DEG C；

(2) syrup low temperature aerosol is clarified: pretreated syrup being divided into two parts, wherein a quarter syrup system Bubble adds polyacrylamide flocculant 2ppm after syrup is mixed with other syrup after system is steeped, sufficiently anti-into coagulation reactor It answers, the syrup sufficiently reacted is sent into floating device and carries out air float processing, and floating clear juice is expelled to from floating device bottom juice yield tube Floating clear juice case, dross is by collecting to dross box, and air bearing process control is in 10min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 55 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 16, and the control of syrup pH value is in 7.3 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying With 500 mesh active carbon filter aids of syrup addition mass fraction 0.05%, 1 μm of plate type ceramic membrane separation, filtered juice are carried out It collects to filtering syrup case, filtered juice is the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixing Mud juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing by two-stage, and the first order is direct Mud juice centrifugalization and juice-removing is carried out, sugared mud adds 60 DEG C of hot water of 2.0 times of sugared mud amounts after sedimentation, and it is de- to carry out two-stage centrifugal after mixing evenly Juice, the sufficiently sugar in recycling mixing mud juice, are down to 4.5 pols for the residual sugar in dry mud hereinafter, dry mud moisture content 60% Hereinafter, the filtered juice mixing of abjection is sent to the floating juice case of step (2), dry mud factory.

Embodiment 2

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: adding milk of lime and phosphoric acid to syrup, total phosphorus acid value is in 400ppm, syrup in adjustment syrup PH value control adjusts pH value 10.8, using gradation plus grey form, i.e., first plus grey pH value control is 7.5, reacts 2 minutes, so Add grey pH value control 9.0 again afterwards, primary heating temperature is controlled at 40 DEG C；

(2) syrup low temperature aerosol is clarified: pretreated syrup being divided into two parts, wherein a quarter syrup system Bubble adds biological flocculant 3ppm after syrup is mixed with other syrup after system is steeped, sufficiently reacts into coagulation reactor, sufficiently The syrup of reaction is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating clear juice from floating device bottom juice yield tube Case, dross is by collecting to dross box, and air bearing process control is in 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 60 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 15, and the control of syrup pH value is in 7.2 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying With 500 mesh super-cells of syrup addition mass fraction 0.1%, carry out 5 μm of metal membrane separations, filtered juice collect to Filtering syrup case, filtered juice are the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixing mud juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing, first order addition by two-stage 55 DEG C of hot water of 50% mud juice amount carry out centrifugalization and juice-removing after mixing evenly, settle 60 DEG C of hot water that sugared mud adds 1.5 times of mud amounts, Two-stage centrifugal is carried out after mixing evenly and takes off juice, the sufficiently sugar in recycling mixing mud juice, and the residual sugar in dry mud is down to 4.0 and is turned Luminosity hereinafter, dry mud moisture content 65% hereinafter, the filtered juice of abjection with the full juice mistake of progress is mixed in the stove drying of step (3) with syrup Filter, dry mud factory.

Embodiment 3

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: adding milk of lime and phosphoric acid to syrup, total phosphorus acid value is in 300ppm, syrup in adjustment syrup PH value control adjusts pH value 10.5, using gradation plus grey form, i.e., first plus grey pH value control is 8.8, reacts 2 minutes, so Add grey pH value control 10.5 again afterwards, primary heating temperature is controlled at 45 DEG C；

(2) syrup low temperature aerosol is clarified: pretreated syrup being divided into two parts, wherein a quarter syrup system Bubble adds modification of chitosan flocculant 5ppm after syrup is mixed with other syrup after system is steeped, sufficiently anti-into coagulation reactor It answers, the syrup sufficiently reacted is sent into floating device and carries out air float processing, and floating clear juice is expelled to from floating device bottom juice yield tube Floating clear juice case, dross is by collecting to dross box, and air bearing process control is in 10min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 55 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 16, and the control of syrup pH value is in 7.5 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying With 200 mesh pearlite filtering aids of syrup addition mass fraction 0.02%, 500 mesh plate and frame filter press separating treatments, filtering are carried out Juice is collected to filtering syrup case, and filtered juice is the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixed Close mud juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing, first order addition by two-stage 60 DEG C of hot water of 50% mud juice amount carry out centrifugalization and juice-removing after mixing evenly, settle 55 DEG C of hot water that sugared mud adds 2 times of mud amounts, stir Two-stage centrifugal is carried out after mixing uniformly and takes off juice, the sufficiently sugar in recycling mixing mud juice, and the residual sugar in dry mud is down to 3.5 and turns light Hereinafter, dry mud moisture content 65% is hereinafter, the filtered juice mixing of abjection is sent to the floating juice case of step (2), dry mud dispatches from the factory degree.

Comparative example 1

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: syrup adds milk of lime and phosphoric acid, and total phosphorus acid value is in 350ppm, syrup pH in adjustment syrup 6.5, primary heating temperature is controlled at 55 DEG C for value control；

(2) syrup low temperature aerosol is clarified: pretreatment syrup being divided into two parts, a quarter syrup carries out bubble processed, system bubble Syrup and other syrup are sufficiently reacted after adding polyacrylamide flocculant 2ppm after mixing into coagulation reactor afterwards, sufficiently The syrup of reaction is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating juice from floating device bottom juice yield tube Case, dross is by collecting to dross box, and air bearing process control is in 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 55 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 16, and the control of syrup pH value is in 7.3 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying 1 μm of plate type ceramic membrane separation is carried out with 500 mesh active carbon filter aids of syrup addition mass fraction 0.05%, filtered juice is received For collection to filtering syrup case, filtered juice is the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixed soil Juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing by two-stage, and the first order is direct Mud juice centrifugalization and juice-removing is carried out, sugared mud adds 60 DEG C of hot water of 2.0 times of sugared mud amounts after sedimentation, and it is de- to carry out two-stage centrifugal after mixing evenly Juice, the sufficiently sugar in recycling mixing mud juice, are down to 4.6 pols for the residual sugar in dry mud hereinafter, dry mud moisture content 65% Hereinafter, the filtered juice mixing of abjection is sent to the floating juice case of step (2), dry mud factory.

Comparative example 2

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: syrup adds milk of lime and phosphoric acid, and total phosphorus acid value is in 350ppm, syrup pH in adjustment syrup 7.3, primary heating temperature is controlled at 35 DEG C for value control；

(2) syrup low temperature aerosol is clarified: pretreatment syrup being divided into two parts, a quarter syrup carries out bubble processed, system bubble Syrup and other syrup are sufficiently reacted after adding polyacrylamide flocculant 3ppm after mixing into coagulation reactor afterwards, sufficiently The syrup of reaction is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating juice from floating device bottom juice yield tube Case, dross is by collecting to dross box, and air bearing process control is in 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 55 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 16, and the control of syrup pH value is in 7.5 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying With syrup addition mass fraction 0.1% 200 mesh pearlite filtering aids carry out 5 μm of metal membrane separations, filtered juice collect to Filtering syrup case, filtered juice are the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixing mud juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing by two-stage, and the first order is direct Mud juice centrifugalization and juice-removing is carried out, sugared mud adds 60 DEG C of hot water of 3.0 times of sugared mud amounts after sedimentation, and it is de- to carry out two-stage centrifugal after mixing evenly Juice, the sufficiently sugar in recycling mixing mud juice, are down to 4.3 pols for the residual sugar in dry mud hereinafter, dry mud moisture content 65% Hereinafter, the filtered juice mixing of abjection is sent to the floating juice case of step (2), dry mud factory.

Comparative example 3

A kind of syrup high quality purification method, the specific steps are as follows:

(1) syrup pre-processes: syrup adds milk of lime and phosphoric acid, and total phosphorus acid value is in 350ppm, syrup pH in adjustment syrup Value control adjusts pH value 9.0, using gradation plus grey form, i.e., first plus grey pH value control is 7.5, reacts 2 minutes, then again 9.0, primary heating temperature is controlled at 55 DEG C for secondary plus grey pH value control；

(2) syrup low temperature aerosol is clarified: pretreatment syrup being divided into two parts, a quarter syrup carries out bubble processed, system bubble Syrup and other syrup are sufficiently reacted after adding polyacrylamide flocculant 4ppm after mixing into coagulation reactor afterwards, sufficiently The syrup of reaction is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating juice from floating device bottom juice yield tube Case, dross is by collecting to dross box, and air bearing process control is in 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 55 DEG C, carries out stove drying neutralisation treatment, sulphur Smoked intensity is 16, and the control of syrup pH value is in 7.4 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying 5 μm of plate type ceramic membrane separations are carried out with 200 mesh super-cells of syrup addition mass fraction 0.1%, filtered juice is received For collection to filtering syrup case, filtered juice is the peace and quiet syrup finally obtained, and the mud juice in filter mud and step (2) is mixed into mixed soil Juice；

(4) mixing mud juice processing: mixing mud juice forces sedimentation centrifuge to carry out de- juice processing by two-stage, and the first order is direct Mud juice centrifugalization and juice-removing is carried out, sugared mud adds 60 DEG C of hot water of 2.0 times of sugared mud amounts after sedimentation, and it is de- to carry out two-stage centrifugal after mixing evenly Juice, the sufficiently sugar in recycling mixing mud juice, are down to 4.5 pols for the residual sugar in dry mud hereinafter, dry mud moisture content 65% Hereinafter, the filtered juice mixing of abjection is sent to the floating juice case of step (2), dry mud factory.

The peace and quiet syrup that the clear juice that above embodiments obtain is obtained with traditional sulfurous method cleaning technique carries out items and refers to Mark compares, and the results are shown in Table 1.

Table 1

Through method of the invention treated clear juice it can be seen from upper table result, embodiment color value is average are as follows: 781.68IU, turbidity are average are as follows: 29.20MAU, simple purity are average are as follows: 83.70AP, colloidal content average value 0.008%, matter Amount is superior to the peace and quiet syrup that traditional sulfurous method cleaning technique obtains, and compared to color value average low 37.78%, turbidity is average low 87.59%, simple purity averagely improves 1.42 units, and colloidal content average low 95.74%, clarifying syrup quality is very high, mud juice Leaching requirement is about the 65% of traditional sulfurous method, has saved water resource and subsequent evaporation energy consumption.

Compared with the average value of comparative example, the embodiment percent of decolourization that is averaged averagely decolourizes the average value of embodiment than comparative example Rate improves 6.87%, and embodiment average colloidal content removal efficiency compares ratio average and improves 23.89%, turbidity, Simple purity and leaching requirement difference are little, and peace and quiet advantageous effect is obvious.

The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention, It should be equivalent substitute mode, be included within the scope of the present invention.

Claims (7)

1. a kind of syrup high quality purification method, it is characterised in that: the following steps are included:

(1) syrup pre-processes: milk of lime and phosphoric acid are added to syrup, adjusts in syrup total phosphorus acid value in 200~450ppm range, The control of syrup pH value is controlled in 8.5~11.5 ranges, primary heating temperature in 25~45 DEG C of ranges；

(2) syrup low temperature aerosol is clarified: pretreated syrup being divided into two parts, a part of syrup carries out bubble processed, after system is steeped Syrup adds 1~5ppm of flocculant after mixing with another part syrup, sufficiently reacts into coagulation reactor, sufficiently reacts Syrup is sent into floating device and carries out air float processing, and floating clear juice is expelled to floating clear juice case from floating device bottom juice yield tube, floats Slag is collected to dross box, and air bearing process control is within 15min；

(3) float clear juice stove drying neutralization and filtering whole juice: floating clear juice is heated to 45~70 DEG C of ranges, carries out in stove drying and locates Reason, the control of syrup pH value is in 6.5~8.0 ranges, gained stove drying and syrup enters in stove drying and syrup case, into stove drying and sugared The filter aid that juice adds mass fraction 0~1% carries out filtering whole juice processing, filtered juice, the peace and quiet syrup as finally obtained, filter Juice is collected to filtering syrup case, and the dross in filter mud and step (2) is mixed into mixing mud juice, obtains mixing mud juice；

(4) mixing mud juice processing: mixing mud juice carries out de- juice processing by vacuum suction filter, centrifuge or filter press, sufficiently returns Receive mixing mud juice in sugar, the residual sugar in dry mud is down to 5 pols hereinafter, abjection filtered juice individually handle or circulation at Reason, dry mud factory.

2. a kind of syrup high quality purification method according to claim 1, it is characterised in that: sugar described in step (1) Total phosphorus acid value is 250~350ppm in juice；The syrup pH value 10.5~11.0, i.e., first adds by gradation plus the final control of ash Ash to pH value 8.5~9.0, then add ash to pH value 10.5~11.0；The primary heating temperature control is at 30~35 DEG C；Institute Stating flocculant is one or more of polyacrylamide, biological flocculant, polyglutamic acid and modification of chitosan composition.

3. a kind of syrup high quality purification method according to claim 1, it is characterised in that: gas described in step (2) Floating process control is within 10min.

4. a kind of syrup high quality purification method according to claim 1, it is characterised in that: pH described in step (3) Value control is 7.2~7.5, and supernatant syrup heating and temperature control is at 45~60 DEG C；The filter aid is diatomite, perlite, sugarcane One or more of chaff, wood powder and active carbon composition, granularity is in 10~1000 mesh.

5. a kind of syrup high quality purification method according to claim 1, it is characterised in that: complete described in step (3) Juice filtering is using UF membrane, filter press or vacuum suction filter, and 0.01~10 μm of UF membrane filtering accuracy, filter press and vacuum are inhaled The filtering accuracy of filter is 200~1000 mesh.

6. a kind of syrup high quality purification method according to claim 1, it is characterised in that: mixed described in step (4) The de- juice treatment process wash water temperature of mud juice is closed less than 60 DEG C.

7. a kind of syrup high quality purification method according to claim 1, it is characterised in that: the independent processing refers to It is individually handled using filtered juice rapid subsidence system or filtered juice floating processing system or film separation system；The circular treatment Refer in the floating clear juice case of return step (2) or the stove drying of step (3) and syrup case carries out circular treatment.