CN1317577A

CN1317577A - Process for clarifying cane juice by sulforous acid-carbonic acid method

Info

Publication number: CN1317577A
Application number: CN 01108403
Authority: CN
Inventors: 瞿东平; 寸守庄
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-28
Filing date: 2001-04-28
Publication date: 2001-10-17

Abstract

A process for clarifying cane juice by sulfurous acid-carbonic acid method includes squeezing to obtain mixed cane juice, pretreating with ash, adding ash and carbonic acid, filter, fumigating with sulfur, neutralizing, and filter. Its advantages include simple process and high effect.

Description

Process for clarifying cane juice by sulforous acid-carbonic acid

The present invention relates to sucrose sugar refining technology technical field, mainly is the cane juice clarification technology of sulfurous method cane sugar factory.

The purpose of cane juice clarification is harmful non-sugar such as colloidalmaterial, coloring matter, ash and suspended substance of removing to greatest extent in the sugarcane juice, is beneficial to crystallization and carries sugar and obtain the fine sugar product.China's cane sugar factory mainly adopts sulfurous method and two kinds of clarification process of carbonatation process at present, and is in the majority with sulfitation sugar mill especially.Sulfitation process craft is simple, reduced investment, production material consumption are low, shortcoming is that clarifying efficiency is low, generally only is about 10%, and clear juice the ash content of coal is more, coloring matter is removed less, thereby boiling house recovery is lower, and commerieal sugar colourity is dark, and water-insoluble is higher, the sulfur dioxide residual quantity height, be difficult to reach the requirement of sugar sanitary index, and the commerieal sugar storage tolerance is poor, storage for a long time can make coloring matter oxidation stain again; The clarifying efficiency of carbonatation process technology is up to 30～40%, the boiling-off rate of recovery is higher about 4 percentage points than sulfurous method, the white sugar sulfur dioxide residual quantity is low, the pure white anti-storage of product, but carbonatation process technology lime consumption is big, is about 10～12 times of sulfurous method, needs required lime and the carbonic acid gas of the special limestone kiln preparation technology of outfit, technology is complicated, and production cost is higher.

Purpose of the present invention be exactly provide in order to solve the deficiencies in the prior art that a kind of technology is simple, the equipment less investment, material consumption is lower, production cost is low, clarifying efficiency is high, can improve white sugar quality and storage tolerance energy, reduce sulfur dioxide residual quantity, sulfurous method and carbonatation process are combined, collect both advantages is cane juice clarification technology all over the body.

The objective of the invention is to be achieved through the following technical solutions.

Sulfurous acid one carbonatation process cane juice clarification technology of the present invention, its processing step is:

(1), mixing juice given ash handle, promptly in mixing juice, add milk of lime, then mixing juice is heated;

(2), mixing juice added grey carbonation handle, promptly in mixing juice, add milk of lime again and charge into carbon dioxide, to obtain full charge juice, then full charge juice is heated;

(3), full charge juice is filtered, obtain a clear juice;

(4), a clear juice is carried out the stove drying neutralizing treatment, promptly in a clear juice, charge into sulfur dioxide gas, obtain defeco-sulfitated juice, then defeco-sulfitated juice is heated;

(5), defeco-sulfitated juice is filtered obtain two clear juice.

It is 0.5～0.9% to the sugarcane ratio that clarification process consumes calcium-oxide, consume sulphur to sugarcane than 0.03～0.06%; Intensity of sulfitation during the stove drying neutralizing treatment is 0.5～0.8g/l; Before one clear juice carried out the stove drying neutralizing treatment, also can in a clear juice, add phosphoric acid; The pH value that gives ash processing terminal point is 6.8～7.4 or 10～11, and the Heating temperature of giving ash back mixing juice is 45～55 ℃; The pH value that full charge is handled terminal point is 10～11, and basicity is 0.03～0.04 gram CaO/100ml, and the Heating temperature of full charge juice is 60～70 ℃; The pH value of stove drying neutralizing treatment terminal point is 7～7.4, and the Heating temperature of defeco-sulfitated juice is 100～102 ℃; The used carbon dioxide of carbonation is the CO 2 waste gas or the boiler flue of the molasses fermented generation of sugar refinery alcohol; The filter method of described full charge juice is that whole-juice filtering or sedimentation are filtered; The filter method of defeco-sulfitated juice is that sedimentation is filtered or the bag filter.

To mixing juice give effect that ash handles mainly be in and the sugarcane juice acid number, alleviate its rancidity, reduce the sucrose inversion loss, the non-sugar of precipitate phosphoric acid salt and carbonate makes colloid produce cohesion etc.; Mixing juice through heating added milk of lime and charge into carbonic acid gas carry out full charge and handle, its effect one is by adding ash to strong basicity, with a large amount of non-sugared impurity of calcium ion cohesion, the 2nd, form the precipitation of calcium carbonate that a large amount of particles are tiny, surface-area is big, adsorptive power is strong by adding grey full charge, more non-sugared impurity is removed in absorption, and the 3rd, under strong basicity, make generation decomposition such as partial reduction sugar, acid amides and protein in the sugarcane leaf and hydrolytic action and remove; Full charge juice has good sedimentation and strainability after heating, obtain a quality clear juice preferably through filtering; To separate a clear juice that obtains through full charge in time charges into sulfur dioxide gas and carries out the stove drying neutralizing treatment and both can make solubility calcium reactant salt residual in sulfurous gas and the syrup generate the calcium sulfite precipitation and a part of non-sugar is removed in absorption, again can in and syrup ph value, so that evaporation process, avoid decomposition of reducing sugar, guarantee the syrup colour, simultaneously, also can play bleaching and decolorization to a clear juice by stove drying, further reduce syrup colourity, improve and boil glycogen material quality; With in the stove drying and after defeco-sulfitated juice filter, the separable two clear juice that obtain, the purity of two clear juice is higher, colourity reduction, calcium salt content is low, and is as clear as crystal, provides the fine syrup source for boiling sugar.

It is 0.5～0.9% to the sugarcane ratio that clarification process consumes calcium-oxide, and consuming sulphur is 0.03～0.06% to the sugarcane ratio; Before one clear juice carried out the stove drying neutralizing treatment, also can in a clear juice, add phosphoric acid, make to generate a part of calcium phosphate, improve settling velocity, strengthen and remove calcium salt and remove the look effect with flocculate precipitate; The used carbon dioxide of carbonation can utilize the CO 2 waste gas or the boiler flue of the molasses fermented generation of sugar refinery alcohol; In order to use conveniently, according to the difference of the filter plant of the former configuration in sugar refinery, the filter method of full charge juice can adopt pressure filter to carry out whole-juice filtering or adopt pressure filter and filtration device to carry out sedimentation and filter; The filter method of defeco-sulfitated juice can adopt the pressure filter sedimentation to filter or filter with bag filter.With pressure filter full charge juice is carried out whole-juice filtering, can obtain a clear juice in the shortest time, avoid the reducing sugar considerable damage, improve purity difference, guarantee a clear juice colourity, adopt in the sugar refinery that is suitable for former configuration pressure filter; And adopt the sedimentation filtration method, and its clarifying efficiency and clear juice quality are all inferior to the whole-juice filtering method, and adopt in the sugar refinery that only is suitable for former configuration filtration device; Full charge juice adopts the whole-juice filtering method, and defeco-sulfitated juice should adopt the sedimentation filtration method, and full charge juice adopts the sedimentation filtration method, and defeco-sulfitated juice preferably adopts a bag filter method.

The present invention is further elaborated below in conjunction with drawings and Examples.

Fig. 1 is first kind of process flow sheet of the present invention,

Fig. 2 is second kind of process flow sheet of the present invention,

Fig. 3 is the third process flow sheet of the present invention.

The present invention is different because of full charge juice and the former outfit filter plant of defeco-sulfitated juice separation method and sugar refinery pattern, can select three kinds of technical process of Fig. 1～Fig. 3.

As shown in Figure 1, with concentration is that the milk of lime of 11～13 ° of Be adds and to give ash in the mixing juice and handle, the pH value that makes mixing juice is 6.8～7.2 or 10～11 two coacervation points, can adopt cyclone mixer to improve the effect of giving ash, mixing juice is heated to 45～55 ℃ then; Adding milk of lime and charge into carbon dioxide full charge to the terminal point pH value of sugarcane juice in the mixing juice of heating in filling-up pot again is 10～11, basicity 0.03～0.04 gram CaO/100ml, and by full charge specific absorption 75%, sugarcane juice absorbs CO ₂To the sugarcane ratio is 5～8g/l, full charge juice is heated to 55～70 ℃ again and carries out whole-juice filtering with pressure filter, makes a clear juice; In a clear juice, add phosphoric acid P ₂O ₅Charge into sulfur dioxide gas behind the 100PPM one clear juice is carried out the stove drying neutralizing treatment, the pH value that makes the neutralizing treatment terminal point is 7.0～7.4, intensity of sulfitation is 0.6～0.8g/l, at last the defeco-sulfitated juice that obtains is heated to 100～102 ℃ and filter through the settling vessel sedimentation and to make two clear juice.Whole clarification process adds ash amount CaO the sugarcane ratio is about 0.5～0.9%, consumes sulphur the sugarcane ratio is about 0.03～0.06%.

Also can carry out whole-juice filtering to full charge juice with pressure filter as shown in Figure 2, in the stove drying and the time do not add phosphoric acid, adopt the bag filtering method to filter to defeco-sulfitated juice; Also can adopt sedimentation to filter to full charge juice as shown in Figure 3, and adopt the bag filtering method to filter defeco-sulfitated juice.

The present invention has following technological effect: (1), raising clarifying efficiency reach 20～30%. A clear juice that obtains through adding grey full charge sedimentation filtration or filtering whole juice, Except pH value height, calcium salt content were higher, gravity purity improved 3～4GP, through sulphur Further except behind the calcium salt, a clear juice quality and clarifying efficiency are common Asias in smoked neutralization Sulfuric acid process is incomparable. Clear juice ash reduces, and molasses produces filter and reduces boiling-off Recovery can improve 2～3 percentage points, and then sugar yield can improve 0.24～0.36 Percentage point. (2), improve clear juice quality, the level of improving the quality of products. Colloid The rate of removing reaches 30～40%; Coloring matter is removed rate about 90%, and clear juice colourity exists Below the 1000IU, turbidity reduces than sulfurous method about 400 degree 50～70%, thereby be expected to control finished product fried sugar degree about 100IU, average specific Sulfurous method white sugar colourity reduces 50IU, and white sugar turbidity, ash content, water are insoluble Thing also can obviously reduce, the level of improving the quality of products. (3), reduce commerieal sugar two Sulfur oxide content. Because the Main Function of clarification is finished sulphur by adding grey full charge The smoked auxiliary clarification that neutralized, intensity of sulfitation is low, the clear residual titanium dioxide of juice Sulphur must reduce, the commerieal sugar content of sulfur dioxide can be down to below the 10mg/kg, Fundamentally improve sulfurous method white sugar quality class, improve its anti-shelf characteric. (4), thoroughly administer the carbon dioxide pollution source that Alcohol Production is discharged.

Manufacturing technique method of the present invention can keep the original process equipment in sugar refinery, and is new Increase little, the instant effect of investment, economic benefit height.

Claims

1, process for clarifying cane juice by sulforous acid-carbonic acid is characterized in that, processing step is:

(1), mixing juice that squeezing is obtained gives ash and handles, and promptly adds milk of lime in mixing juice, then mixing juice is heated;

(3), full charge juice is filtered, obtain a clear juice;

(5), defeco-sulfitated juice is filtered obtain two clear juice.

2, cane juice clarification technology according to claim 1 is characterized in that, it is 0.5～0.9% to the sugarcane ratio that the clarification process process consumes calcium-oxide, and consuming sulphur is 0.03～0.06% to the sugarcane ratio.

3, cane juice clarification technology according to claim 1 is characterized in that, the intensity of sulfitation during the stove drying neutralizing treatment is 0.5～0.8g/l.

4, cane juice clarification technology according to claim 1 is characterized in that, a clear juice is carried out the stove drying neutralizing treatment before, in a clear juice, add phosphoric acid.

5, cane juice clarification technology according to claim 1 is characterized in that, the pH value that gives ash processing terminal point is 6.8～7.2 or 10～11, and the Heating temperature of giving ash back mixing juice is 45～55 ℃; The pH value that full charge is handled terminal point is 10～11, and basicity is 0.03～0.04 gram CaO/100ml, and the Heating temperature of full charge juice is 60～70 ℃; The pH value of stove drying neutralizing treatment terminal point is 7～7.4, and the Heating temperature of defeco-sulfitated juice is 100～102 ℃.

6, cane juice clarification technology according to claim 1 is characterized in that, the used carbon dioxide of carbonation is the CO 2 waste gas or the boiler flue of the molasses fermented generation of sugar refinery alcohol.

7, cane juice clarification technology according to claim 1 is characterized in that, the filter method of described full charge juice is that whole-juice filtering or sedimentation are filtered.

8, cane juice clarification technology according to claim 1 is characterized in that, the filter method of described defeco-sulfitated juice is that sedimentation is filtered or the bag filter.