阅读说明：本技术 一种糖浆澄清系统及方法 (Syrup clarifying system and method ) 是由 孔庆年 于东源 陈花山 齐立臣 王健 迟雅丽 刘琳 侯宪邦 于 2020-04-17 设计创作，主要内容包括：本申请提供一种糖浆澄清系统及方法。该系统及方法中,碳酸钙晶体在第二级饱充糖浆老化处理的过程中不断变大,有利于增加吸附效果。以第三级饱充糖浆中的碳酸钙作为助滤剂对压滤机进行预涂,有效防止活性炭过滤时发生漏炭现象,无需购买硅藻土,也无需设计硅藻土预涂罐,节约成本、操作简便。预涂过程中形成的预涂液返回至第一脱色罐中,避免糖浆的浪费,提高资源利用率。活性炭对糖浆充分脱色的过程中,碳酸钙与活性炭发挥协同作用,充分吸附糖浆中的色素、胶体和非糖分,极大提高糖浆的脱色率。反应混合物通过预涂后的压滤机进行过滤,该压滤机以碳酸钙为助滤剂同步过滤反应混合物中的碳酸钙和活性炭,无需额外增加过滤设备,大大减少生产成本。(The present application provides a syrup clarification system and method. In the system and the method, the calcium carbonate crystals are continuously enlarged in the aging treatment process of the second-stage saturated syrup, which is beneficial to increasing the adsorption effect. Calcium carbonate in the third-stage saturated syrup is used as a filter aid to pre-coat the filter press, so that the phenomenon of carbon leakage during filtering of the activated carbon is effectively prevented, diatomite does not need to be purchased, a diatomite pre-coating tank does not need to be designed, the cost is saved, and the operation is simple and convenient. The precoating liquid formed in the precoating process returns to the first decolorizing tank, so that the waste of syrup is avoided, and the resource utilization rate is improved. In the process of fully decoloring the syrup by the activated carbon, the calcium carbonate and the activated carbon play a synergistic role, so that pigments, colloids and non-sugar in the syrup are fully adsorbed, and the decoloring rate of the syrup is greatly improved. The reaction mixture is filtered by a precoated filter press, and the filter press synchronously filters calcium carbonate and active carbon in the reaction mixture by taking the calcium carbonate as a filter aid, so that additional filtering equipment is not required, and the production cost is greatly reduced.)

1. The syrup clarifying system is characterized by comprising a third stage saturated syrup aging tank (1), a first decolorizing tank (2), a filter press (3) and a filter detecting device (4) which are connected in sequence; the first decolorizing tank (2) is also connected with an activated carbon preparation tank (5);

the filter press (3) is also connected with the third stage saturated syrup aging tank (1) so that the third stage saturated syrup in the third stage saturated syrup aging tank (1) can precoat the filter press (3), and the formed precoating liquid flows back to the first decoloring tank (2).

2. The syrup clarification system according to claim 1, wherein the bore size of the diafiltration device (4) is 1-100 μm.

3. The syrup clarification system according to claim 1, further comprising a second decolorizing tank (6), the second decolorizing tank (6) being located between the first decolorizing tank (2) and the filter press (3).

4. A method of syrup clarification comprising:

the second-stage saturated syrup is aged in a third-stage saturated syrup aging tank to obtain third-stage saturated syrup;

pre-coating the filter press by adopting the third-stage saturated syrup;

carrying out a decoloring reaction on the third-stage saturated syrup and activated carbon in a first decoloring tank to obtain a reaction mixture;

the reaction mixture was filtered through the precoated filter press to give a clear syrup.

5. The syrup clarification method according to claim 4, wherein the precoating liquid formed after precoating the filter press with the third stage saturated syrup is returned to the first decolorizing tank.

6. The syrup clarification method according to claim 4, wherein the reaction mixture is filtered in the filter press after the decolorization reaction in the second decolorization tank.

7. The syrup clarification method of claim 4, wherein the mass ratio of the third stage saturated syrup to the activated carbon is 1: (0.5 per mill-1%).

8. The syrup clarification method according to claim 4, wherein the aging time of the second stage saturated syrup is 5-30 min.

9. The syrup clarification method according to claim 4, characterized in that the precoating endpoint is judged according to the turbidity of the syrup at the outlet of the filter press.

10. The syrup clarification method according to claim 4, wherein the residence time of the third stage saturated syrup in the first decolorizing tank is 10-60 min.

Technical Field

The invention relates to the technical field of sugar production, in particular to a syrup clarifying system and a syrup clarifying method.

Background

China is one of the largest sugar-eating producing and consuming countries in the world, and the sugar industry occupies an important position in national economy.

At present, there are two methods for sugar production from sugarcane: one is to directly produce the white granulated sugar by a sulfurous acid method or a carbonic acid method, which is also called a one-step method; the other method is to prepare the raw sugar by a limestone method, and then dissolve the raw sugar back, fill, evaporate and crystallize again to obtain refined sugar, which is also called as a two-step method. In the sugar making process of sugarcane, syrup needs to be decolorized to obtain white granulated sugar. Because the activated carbon has a highly developed pore structure, a huge specific surface area and strong adsorption capacity, the melanoidins which have the greatest influence on the finished product sugar color value can be adsorbed by the activated carbon, and meanwhile, the precursors, colloids, organic non-sugar components, inorganic components and the like of pigments are removed, so that the purpose of syrup decoloration is achieved.

Since the particle size of the activated carbon is small, the filter cloth channel is blocked during filtration, and the filtration pressure is increased, so that the filter is usually precoated with filter aids such as diatomite and perlite during filtration. Therefore, the diatomite precoating tank needs to be built, the cost is increased, the cost per ton of sugar is increased by adding the diatomite, and the sugar production cost is greatly increased.

Disclosure of Invention

The invention provides a syrup clarifying system and a syrup clarifying method, which aim to solve the problem of high cost of the existing sugar making method.

In a first aspect, the invention provides a syrup clarifying system, which comprises a third stage saturated syrup aging tank, a first decoloring tank, a filter press and a filter detecting device, wherein the third stage saturated syrup aging tank, the first decoloring tank, the filter press and the filter detecting device are connected in sequence; the first decolorizing tank is also connected with an activated carbon preparation tank;

the filter press is also connected with the third stage saturated syrup aging tank, so that the third stage saturated syrup in the third stage saturated syrup aging tank precoats the filter press, and formed precoating liquid flows back to the first decoloring tank.

Preferably, the pore size of the detection and filtration equipment is 1-100 μm.

Preferably, the system further comprises a second decolorizing tank located between the first decolorizing tank and the filter press.

In a second aspect, the present invention provides a method of clarifying a syrup comprising:

the second-stage saturated syrup is aged in a third-stage saturated syrup aging tank to obtain third-stage saturated syrup;

pre-coating the filter press by adopting the third-stage saturated syrup;

carrying out a decoloring reaction on the third-stage saturated syrup and activated carbon in a first decoloring tank to obtain a reaction mixture;

the reaction mixture was filtered through the precoated filter press to give a clear syrup.

Preferably, the precoating liquid formed after the third stage saturated syrup precoats the filter press is returned to the first decolorizing tank.

Preferably, the reaction mixture enters the filter press for filtration after the decolorization reaction in the second decolorization tank.

Preferably, the mass ratio of the third-stage saturated syrup to the activated carbon is 1: (0.5 per mill-1%).

Preferably, the aging time of the second stage saturated syrup is 5-30 min.

Preferably, the precoating endpoint is judged according to the turbidity of the syrup at the outlet of the filter press.

Preferably, the residence time of the third stage saturated syrup in the first decolorizing tank is 10-60 min.

The technical scheme provided by the embodiment of the invention can have the following beneficial effects:

in the syrup clarifying system and the syrup clarifying method, the calcium carbonate crystals are continuously enlarged in the second-stage saturated syrup aging treatment process, and the enlarged calcium carbonate crystals are favorable for increasing the adsorption effect and achieving the aim of decoloring. Calcium carbonate in the third-stage saturated syrup is used as a filter aid to pre-coat the filter press, so that the phenomenon of carbon leakage during filtering of the activated carbon can be effectively prevented, meanwhile, diatomite does not need to be purchased, a diatomite pre-coating tank does not need to be designed, and the cost is saved, and the operation is simple and convenient. Precoating the in-process and form precoating liquid and returning to first decoloration jar in to carry out the decoloration through first decoloration jar to precoating liquid and handle, and then avoid the waste of syrup, improve resource utilization. In the process of the third-stage saturated syrup and the activated carbon for full decolorization reaction and the process of the pre-coating liquid and the activated carbon for full decolorization reaction, the calcium carbonate in the third-stage saturated syrup and the activated carbon play a synergistic effect to fully adsorb pigments, colloids and non-sugar in the syrup, so that the decolorization rate of the syrup is greatly improved, and a reaction mixture which is decolorized and contains calcium carbonate and activated carbon is obtained. The reaction mixture is filtered by a filter press which is precoated by the third-stage saturated syrup containing calcium carbonate, and the filter press uses the calcium carbonate as a filter aid to synchronously filter the calcium carbonate and the activated carbon in the reaction mixture, so that additional filtering equipment is not needed, and the production cost is greatly reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic diagram of a syrup clarification system according to an embodiment of the present invention;

FIG. 2 is a flow diagram of a syrup clarification method provided by an embodiment of the present invention;

the symbols represent:

1-a third-stage saturated syrup aging tank, 2-a first decolorizing tank, 3-a filter press, 4-a filter detection device, 5-an active carbon preparation tank and 6-a second decolorizing tank.

Detailed Description

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a syrup clarification system according to an embodiment of the present disclosure, wherein the arrows are in the direction of flow. As can be seen from the attached drawing 1, the syrup clarifying system provided by the embodiment of the application comprises a third-stage saturated syrup aging tank 1, a first decolorizing tank 2, a filter press 3 and a filter detecting device 4 which are connected in sequence, wherein the first decolorizing tank 2 is also connected with an activated carbon preparation tank 5.

Specifically, the third stage saturated syrup aging tank 1 is a component for performing aging treatment on the second stage saturated syrup. In the process of the second-stage saturated syrup aging treatment, the calcium carbonate crystals added into the third-stage saturated syrup aging tank 1 are continuously enlarged, and the enlarged calcium carbonate crystals are beneficial to increasing the adsorption effect and achieving the aim of decolorization. And aging the third stage saturated syrup by using the third stage saturated syrup aging tank 1 to obtain the third stage saturated syrup containing calcium carbonate.

The first decolorizing tank 2 is a part for decolorizing aged third-stage saturated syrup and activated carbon, and the activated carbon preparation tank 5 is a part for preparing and containing activated carbon. In order to enable the third-stage saturated syrup to react with the activated carbon in the first decolorizing tank 2, the first decolorizing tank 2 is respectively connected with the third-stage saturated syrup aging tank 1 and the activated carbon preparation tank 5. The decoloring reaction occurring in the first decoloring tank 2 is adsorption decoloring. And carrying out adsorption decoloration reaction on the third-stage saturated syrup to obtain a reaction mixture of decolored third-stage saturated syrup and active carbon.

The filter press 3 is a part for filtering the reaction mixture to remove activated carbon and calcium carbonate from the reaction mixture. In the present embodiment, the filter press 3 is preferably a plate and frame filter press. Since the particle size of the activated carbon is small, the filter cloth channel is blocked during filtering, and the filtering pressure is increased, in the embodiment of the application, the filter press 3 is pre-coated with a third stage saturated syrup containing calcium carbonate as a filter aid before the filter press 3 is used for filtering the reaction mixture. Specifically, the filter press 3 is further connected with a third-stage saturated syrup aging tank 1, so that the third-stage saturated syrup in the third-stage saturated syrup aging tank 1 precoats the filter press 3, and the formed precoating liquid flows back to the first decoloring tank 2. In the third level of containing calcium carbonate fills the syrup fully, calcium carbonate is because of ageing and the crystal increase in the ageing jar 1 of third level filling syrup fully, and the calcium carbonate crystal of increase is favorable to filter press 3 to the filtration of active carbon, and then can prevent effectively that the active carbon from taking place to leak the charcoal phenomenon when filtering, need not to purchase the diatomaceous earth simultaneously, also need not to design diatomaceous earth precoating jar, practices thrift cost, easy and simple to handle.

The filtering detection device 4 is used for detecting whether the syrup obtained after filtering by the filter press 3 contains active carbon or not so as to ensure that the active carbon cannot leak. Preferably, the size of the pores of the diafiltration device 4 is between 1 and 100 μm in order to allow sufficient detection of the presence of activated carbon in the decolourised syrup.

To achieve the decolorization effect, the third stage saturated syrup should be in sufficient contact with the activated carbon and react, so that the contact time of the third stage saturated syrup and the activated carbon needs to be prolonged. However, for the manufacturing enterprises, the extension of the production time affects the production efficiency. In addition, the precoating liquid formed by precoating the filter press 3 with the third stage saturated syrup is returned to the first decolorizing tank 2, and it is also necessary to ensure that the precoating liquid is in sufficient contact with the activated carbon. Based on this, the syrup clarifying system provided by the embodiment of the application also comprises a second decoloring tank 6, and the second decoloring tank 6 is positioned between the first decoloring tank 2 and the filter press 3.

Referring to fig. 2, fig. 2 is a flow chart illustrating a syrup clarification method according to an embodiment of the present application, wherein the arrow direction is a material flow direction. According to the attached figure 2, the syrup clarifying method provided by the embodiment of the application comprises the following steps:

s01: and the second-stage saturated syrup is aged in a third-stage saturated syrup aging tank to obtain third-stage saturated syrup.

And conveying the second-stage saturated syrup to a third-stage saturated syrup aging tank 1 for aging treatment. In the process of the second-stage saturated syrup aging treatment, the calcium carbonate crystals added into the third-stage saturated syrup aging tank 1 are continuously enlarged, and the enlarged calcium carbonate crystals are beneficial to increasing the adsorption effect and achieving the aim of decolorization. And (3) carrying out aging treatment on the third-stage saturated syrup aging tank 1 to obtain a third-stage saturated syrup containing calcium carbonate, wherein the third-stage saturated syrup part is used for pre-coating the filter press 3, and the other part enters the first decoloring tank 2 for decoloring.

More preferably, the second stage saturated syrup is aged in the third stage saturated syrup aging tank 1 for 5-30 min.

S02: and pre-coating the filter press with the third stage saturated syrup.

Since the particle size of the activated carbon is small, the filter cloth channel is blocked during filtering, and the filtering pressure is increased, in the embodiment of the application, the filter press 3 is pre-coated with a third stage saturated syrup containing calcium carbonate as a filter aid before the filter press 3 is used for filtering the reaction mixture. In the third level of containing calcium carbonate fills the syrup fully, calcium carbonate is because of ageing and the crystal increase in the ageing jar 1 of third level filling syrup fully, and the calcium carbonate crystal of increase is favorable to filter press 3 to the filtration of active carbon, and then takes place to leak the charcoal phenomenon when can effectively preventing to filter the active carbon, need not to purchase the diatomaceous earth simultaneously, also need not to design diatomaceous earth precoating jar, practices thrift cost, easy and simple to handle.

Precoating the in-process and form precoating liquid and returning to first decoloration jar 2 in to carry out the decoloration through first decoloration jar 2 to the liquid of precoating and handle, and then avoid the waste of syrup, improve resource utilization.

During the process of pre-coating the filter press 3 by using the third-stage saturated syrup containing calcium carbonate, the pre-coating end point is judged according to the turbidity of the syrup at the outlet of the filter press 3 so as to determine whether the pre-coating is finished. The third stage saturated syrup containing calcium carbonate was tested to precoat the filter press 3 for about 10-60 min. Of course, the precoating time needs to be specifically determined according to the turbidity of the syrup at the outlet of the filter press 3.

S03: and carrying out decolorization reaction on the third-stage saturated syrup and activated carbon in a first decolorization tank to obtain a reaction mixture.

After the filter press 3 is precoated with the third-stage saturated syrup containing calcium carbonate, the third-stage saturated syrup after the aging treatment of the third-stage saturated syrup aging tank 1 and the active carbon in the active carbon preparation tank 5 are conveyed into the first decolorizing tank 2, so that the third-stage saturated syrup and the active carbon are fully contacted to generate a decolorizing reaction, and a reaction mixture containing calcium carbonate and active carbon is obtained. In the decoloring reaction process, calcium carbonate in the third-stage saturated syrup and active carbon play a synergistic effect, so that pigments, colloids and non-sugar in the syrup are fully adsorbed, and the decoloring rate of the syrup is greatly improved. More preferably, the mass ratio of the third stage saturated syrup to the activated carbon is 1: (0.5 per mill-1%).

Because the precoating liquid that forms in the precoating process returns to first decoloration jar 2 in, therefore, for making the full decoloration reaction of third level full filling syrup and active carbon, precoating liquid and active carbon full decoloration reaction do not influence production efficiency simultaneously, obtain reaction mixture in the first decoloration jar 2 and get into further decoloration in second decoloration jar 6 to reduce the color value of syrup, the decoloration effect of full play active carbon simultaneously. More preferably, the residence time of the third stage saturated syrup in the first decolorizing tank is 10-60min and the residence time of the reaction mixture in the second decolorizing tank 6 is 20-60 min.

S04: the reaction mixture was filtered through the precoated filter press to give a clear syrup.

And (3) conveying the reaction mixture which is subjected to the two decolorization reactions and contains calcium carbonate and active carbon to a filter press 3 for filtering to obtain clear syrup. Because the filter press 3 is pre-coated with the third stage saturated syrup containing calcium carbonate, the filter press 3 uses calcium carbonate as a filter aid to synchronously filter calcium carbonate and activated carbon in the reaction mixture without additionally adding filter equipment.

The clarified syrup obtained by filtering through the filter press 3 is conveyed to the filter detection equipment 4 for detection, so that no active carbon exists in the syrup, and the problem of active carbon leakage does not occur in the filter press 3. Preferably, the pore size of the diafiltration device 4 is 1-100 μm.

In the syrup clarifying system and the syrup clarifying method provided by the embodiment of the application, the calcium carbonate crystals are continuously enlarged in the second-stage saturated syrup aging treatment process, and the enlarged calcium carbonate crystals are favorable for increasing the adsorption effect and achieving the decoloring purpose. Calcium carbonate in the third-stage saturated syrup is used as a filter aid to pre-coat the filter press 3, so that the phenomenon of carbon leakage during filtering of the activated carbon can be effectively prevented, meanwhile, diatomite does not need to be purchased, a diatomite pre-coating tank does not need to be designed, and the cost is saved, and the operation is simple and convenient. Precoating the in-process and form precoating liquid and returning to first decoloration jar 2 in to carry out the decoloration through first decoloration jar 2 to the liquid of precoating and handle, and then avoid the waste of syrup, improve resource utilization. In the process of the third-stage saturated syrup and the activated carbon for full decolorization reaction and the process of the pre-coating liquid and the activated carbon for full decolorization reaction, the calcium carbonate in the third-stage saturated syrup and the activated carbon play a synergistic effect to fully adsorb pigments, colloids and non-sugar in the syrup, so that the decolorization rate of the syrup is greatly improved, and a reaction mixture which is decolorized and contains calcium carbonate and activated carbon is obtained. The reaction mixture is filtered by a filter press 3 which is precoated by the third-stage saturated syrup containing calcium carbonate, and the filter press 3 uses calcium carbonate as a filter aid to synchronously filter calcium carbonate and active carbon in the reaction mixture, so that additional filtering equipment is not needed, and the production cost is greatly reduced.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.