CN205974554U - Production line of rich polyphenol brown sugar - Google Patents

Abstract

A production line of polyphenol-rich brown sugar, the pressing equipment, impurity removal and filtering equipment, pre-ash tank, tubular heat exchanger and steam heater of the production line are connected in sequence, the milk of lime storage tank is connected to the pre-ash tank, and the outlet of the steam heater is Connected to the inlet of the first-level ceramic membrane, the outlet of the concentrated solution of the first-level ceramic membrane is connected to the pre-ash tank through the full filling equipment and the plate and frame filter press, and the clear liquid outlet of the first-level ceramic membrane is connected to the inlet of the second-level nanofiltration membrane; The outlet of the first-level nanofiltration membrane concentrate is connected to the brown sugar packaging equipment through vacuum evaporation and concentration equipment, atmospheric pressure concentration equipment, crystallization box, and forming molds; the outlet of the second-level nanofiltration membrane clear liquid is connected to the white sugar production line. The utility model adopts two-stage ceramic membranes with different membrane pore sizes to filter sugarcane juice, and uses two-stage membranes to filter the concentrated juice to produce polyphenol-rich brown sugar, and the functional components polyphenols in the two-stage membrane concentrated juice are effectively enriched Compared with the traditional production process, it has increased by 4 to 8 times, and the quality and nutritional value of brown sugar have been improved.

Description

A production line of polyphenol-rich brown sugar

technical field

The utility model relates to the field of sugar making technology, in particular to a production line of polyphenol-rich brown sugar.

Background technique

Sugarcane sugar industry is the pillar industry of Guangxi's national economy and a comprehensive industry involving the primary, secondary and tertiary industries. The production and life of nearly half of the population in the region is closely related to the sugarcane industry. main support. In recent years, due to the impact of international sugar prices, sugar prices have been falling. Coupled with high production costs, weak agricultural foundation, low degree of mechanization, single variety of industrial products, and lack of market competitiveness, Guangxi's sugar industry has come to a critical crossroads. To this end, the Guangxi District Government has issued a series of policies to promote the transformation and upgrading of Guangxi's sugar industry. Strengthen the industry's ability to resist risks", and effectively improve the sustainable development ability and international competitiveness of Guangxi's sugar industry.

Brown sugar is originally brown sugar with a darker color. Because the color is similar to black, it is called brown sugar in Japan and Taiwan, and brown sugar in mainland China. Brown sugar is unrefined, decolorized sucrose. In addition to providing heat energy, it also contains a small amount of polyphenols and a variety of essential amino acids, malic acid, riboflavin, carotene, niacin and trace elements that are indispensable for human growth and development, such as calcium, potassium, iron, magnesium and Folic acid and other minerals have high nutritional value and are beneficial to the acid-base balance in the human body.

The traditional brown sugar production method is mainly to heat the cane juice to boiling after squeezing the sugarcane juice. At this time, the impurities will float up with the generation of air bubbles, skim off the upper layer of scum, and carry out step-by-step evaporation concentration. And stir to stimulate the crystals to form flaked sugar or powdered sugar. However, due to the low clarification efficiency of the traditional brown sugar production process, the impurity content of the brown sugar product is high, and turbidity occurs after being dissolved in water; and the production efficiency of the traditional process is low, and it is difficult to realize industrial production.

Polyphenolic compounds refer to the general term of plant components with several phenolic hydroxyl groups in the molecular structure, including phenolic acids and flavonoids. Polyphenolic compounds have a certain antioxidant capacity and have been included in the category of natural antioxidants. They are excellent donors of hydrogen or electrons. and other free radicals have obvious scavenging effect. Oxidative damage is an important cause of many chronic diseases, such as cardiovascular disease, cancer and aging. The antioxidant function of polyphenols can play a preventive role in these chronic diseases. Sugarcane contains a large amount of pigment substances, which are polyphenolic compounds and flavonoid compounds, and the content of polyphenolic substances is more than that of many fruits or vegetables. The polyphenolic extracts in sugarcane have strong free radical scavenging and antioxidant activities, which are of great significance to human nutrition, health and disease prevention. Studies have shown that polyphenols contained in sugarcane are water-soluble pigments with a carbon skeleton of C6-C3-C6, and have more than two hydroxyl groups on the benzene ring. There are three common types: cyanine Anthocyanins, anthocyanins (flavonoids), and catechins. According to Helge's and Clark's research, the polyphenolic compounds in sugarcane are mostly concentrated in the tip of the sugarcane near the growth point. The distribution of high-molecular-weight polyphenolic compounds with a molecular weight above 5000 in the whole sugarcane is as follows: cane leaves account for 33%, cane tips (0-11 nodes) account for 37%, and cane stems after removing tips only account for 30%. Although it is only a small part of the cane stem, there are more polyphenols than the cane stem, and they are relatively concentrated. During the juicing process of sugarcane, most of these water-soluble polyphenol compounds enter the sugarcane juice.

Therefore, when sugarcane with belt leaves is used as raw material, the juice is used to produce brown sugar products after squeezing, and the process adopts efficient membrane separation technology to clean the sugarcane juice, which can effectively improve the quality of brown sugar; The process of producing brown sugar with phenolic substances can effectively improve the nutritional value and functional value of brown sugar. It meets the demands of modern people for functional and nutritious food; at the same time, it also meets the requirements of diversification and high value of sugarcane products, and it is the embodiment of opening up a new path for the development of sugarcane industry.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and provides a production line of brown sugar rich in polyphenols.

In order to achieve the above object, the utility model adopts the following technical solutions:

A production line of polyphenol-rich brown sugar, including pressing equipment, impurity removal and filtration equipment, pre-ash tank, lime milk storage tank, tubular heat exchanger, steam heater, first-level ceramic membrane, second-level nanofiltration membrane, evaporation and concentration Equipment, atmospheric concentration equipment, crystallizers, forming molds and brown sugar packaging equipment;

The pressing equipment, impurity removal and filtering equipment, pre-ash tank, tubular heat exchanger and steam heater are connected in sequence, the lime milk storage tank is connected to the pre-ash tank, the outlet of the steam heater is connected to the inlet of the first-level ceramic membrane, and the first-level The concentrated liquid outlet of the ceramic membrane is connected to the pre-ash cylinder through the full filling equipment and the plate and frame filter press, and the clear liquid outlet of the first-level ceramic membrane is connected to the inlet of the second-level nanofiltration membrane;

The outlet of the secondary nanofiltration membrane concentrate is connected to the brown sugar packaging equipment through vacuum evaporation concentration equipment, atmospheric pressure concentration equipment, crystal aid box, and forming mold in sequence;

The outlet of the secondary nanofiltration membrane liquid is connected to the white sugar production line;

The pore diameter of the first-stage ceramic membrane is 50-200nm, the transmembrane pressure difference is 0.25-0.45Mpa, the membrane surface flow rate is 4-5m/s, and the volume concentration factor is 8-12;

The molecular weight cut-off of the secondary nanofiltration membrane is 1-5kDa, the transmembrane pressure difference is 0.6-1.0Mpa, the membrane surface flow velocity is 4.5-5.5m/s, and the volume concentration factor is 8-10.

Further, the impurity removal and filtration equipment is a combination of a 100-200-mesh vibrating screen and a 200-300-mesh rotary vibrating screen. The pH of the material is adjusted to 7.0-7.5 in the lime milk storage tank, and the heating temperature of the tubular heat exchanger is 55-55. 65°C, the heating temperature of the steam heater is 80-90°C, the evaporation and concentration equipment is a falling film vacuum evaporation system or an atmospheric pressure evaporation system, and the atmospheric pressure concentration equipment is a sandwich iron pan.

Further, the white sugar production line includes white sugar vacuum evaporation and concentration equipment, sugar boiling and crystallization equipment, separation equipment, drying equipment and white sugar packaging equipment connected in sequence.

Compared with the prior art, the utility model has the beneficial effects:

The utility model adopts two-stage ceramic membranes with different membrane pore sizes to filter sugarcane juice, and uses two-stage membranes to filter the concentrated juice to produce polyphenol-rich brown sugar, and the functional components polyphenols in the two-stage membrane concentrated juice are effectively enriched , Compared with the traditional production process, it has increased by 4 to 8 times, thereby improving the quality and nutritional value of brown sugar. The turbidity of the obtained nutritious brown sugar after dissolving to 12°Bx is below 1NTU, and the obtained product brown sugar is rich in fragrance and brown in color, and each index reaches the national standard requirement of first-grade brown sugar (brown sugar).

Compared with the mixed juice, the color value of the clear juice obtained by secondary nanofiltration membrane filtration is reduced by 40% to 60%, the turbidity is reduced by 99.99%, and the purity is increased by 1% to 3%. The secondary membrane filtered juice can be used for white sugar production.

The inventiveness of the utility model is mainly reflected in:

(1) After obtaining the heated raw material liquid, use ceramic membranes with different membrane pore sizes to filter twice, and first filter with a ceramic membrane with a larger pore size to remove most of the non-sugar impurities such as ash, colloid, and small sugarcane pith in the mixed juice , and then use a membrane with a smaller pore size to filter the first-level clear juice, effectively intercept the polyphenols in the first-level membrane clear juice, etc., and obtain the second-level membrane concentrated juice enriched in polyphenols for the production of polyphenol-rich brown sugar, and at the same time obtain The secondary membrane clear juice with lower color value, lower turbidity and higher purity can be used in the production of white granulated sugar. However, in the prior art, there is no process for sugar juice to be filtered twice.

(2) A first-stage ceramic membrane with a pore size of 50-200nm and a second-stage nanofiltration membrane with a molecular weight cut-off of 1-5kDa. Only by using the membrane with the above-mentioned pore size for two-stage filtration can polyphenols be enriched and reduced as much as possible. Other invalid impurities affecting the quality of brown sugar.

Description of drawings

Fig. 1 is the equipment connection schematic diagram of the production line of polyphenol-rich brown sugar described in the utility model.

detailed description

The technical solution of the utility model will be further elaborated below through the embodiments.

Example 1

A production line for polyphenol-rich brown sugar, including pressing equipment 1, impurity removal and filtering equipment 2, pre-ash tank 4, milk of lime storage tank 3, tubular heat exchanger 5, steam heater 6, primary ceramic membrane 7, two Grade nanofiltration membrane 19, evaporative concentration equipment 13, atmospheric concentration equipment 14, crystal aid box 15, forming mold 16 and brown sugar packaging equipment 17;

The pressing equipment 1, impurity removal and filtering equipment 2, pre-ash tank 4, tubular heat exchanger 5 and steam heater 6 are connected in sequence, the milk of lime storage tank 3 is connected to the pre-ash tank 4, and the outlet of the steam heater 6 is connected to The first-level ceramic membrane inlet 7, the concentrated solution outlet of the first-level ceramic membrane is connected to the pre-ash tank through the full filling equipment 20 and the plate and frame filter press 21, and the clear liquid outlet of the first-level ceramic membrane is connected to the second-level nanofiltration membrane 8 inlet ,

The outlet of the concentrated liquid of the secondary ceramic membrane 8 is connected to the brown sugar brown sugar packaging equipment 17 through the evaporation concentration equipment 13, the atmospheric pressure concentration equipment 14, the crystal booster box 15, and the forming mold 16 in sequence,

The outlet of the second-stage nanofiltration membrane 8 is connected to the white sugar production line;

The pore diameter of the first-stage ceramic membrane 7 is 50-200nm, the transmembrane pressure difference is 0.25-0.35Mpa, the membrane surface flow velocity is 4-5m/s, and the volume concentration factor is 8-12;

The pore diameter of the secondary nanofiltration membrane 8 is 1-5kDa, the transmembrane pressure difference is 0.6-1.0Mpa, the membrane surface flow velocity is 4.5-5.5m/s, and the volume concentration factor is 8-10.

The impurity removal and filtering equipment 2 is a combination of a 50-100-mesh vibrating screen and a 200-300-mesh rotary vibrating sieve. The pH of the material is adjusted to 7.0-7.5 in the lime milk storage tank 4, and the heating temperature of the tubular heat exchanger 5 is 55-65°C, the heating temperature of the steam heater 6 is 80-90°C, the evaporation and concentration equipment 13 is a falling-film vacuum evaporation system or an atmospheric pressure evaporation system, and the atmospheric pressure concentration equipment 14 is a sandwich iron pan.

The white sugar production line includes white sugar vacuum evaporation and concentration equipment 9 , sugar boiling and crystallization equipment 10 , separation equipment 11 , drying equipment 12 and white sugar packaging equipment 19 connected in sequence.

Embodiment 2～4 is the example that utilizes polyphenol-rich brown sugar production line described in the utility model to carry out production, and concrete operating steps are as follows:

Example 2

A production process of polyphenol-rich black sugar, comprising the steps of:

(1) get the sugarcane that does not remove cane tip and sugarcane leaf as raw material;

(2) Squeezing sugarcane to obtain mixed juice, using a 100-mesh vibrating sieve to remove large particles of impurities such as bagasse, and then using a 200-mesh rotary vibrating sieve to remove small particles of impurities to obtain a raw material solution;

(3) Add lime milk to the raw material liquid to adjust the pH to 7.5, then heat it to 60°C through a tubular heat exchanger, pump it to the buffer tank, and heat it to 85°C with steam to obtain a heated raw material liquid;

(4) Clarify and filter through a 50nm first-class ceramic membrane, the transmembrane pressure difference is 0.45Mpa, the membrane surface flow rate is 4m/s, and the volume concentration factor is 10 to remove most of the non-sugar impurities such as bacteria, ash, and colloid in the mixed juice , to obtain the first-level membrane clear juice and the first-level membrane filtration concentrate, and the first-level membrane concentrate is pumped into the raw material liquid after being clarified by the membrane concentrate;

(5) The first-level membrane clear juice is pumped to the second-level membrane feed liquid tank, filtered through the second-level nanofiltration membrane with a molecular weight cut-off of 1kDa, the transmembrane pressure difference is 1.0Mpa, the membrane surface flow rate is 5.5m/s, and the filtration temperature is 70 ℃, the volume concentration factor is 8, the secondary membrane can effectively retain the polyphenols in the primary clear juice, etc., and the secondary membrane concentrated juice rich in polyphenols and color value, low turbidity and high purity can be obtained respectively The secondary membrane clear juice;

(6) The secondary membrane concentrated juice is concentrated to 65 ° BX through the falling film vacuum evaporation system, and the sugar is boiled in a sandwich iron pan under normal pressure until the sugar cake has a hammer degree of 94 ~ 95 ° BX, and the sugar cake is moved to the auxiliary Crystal box, stir the crystal and pour it into a wooden mold covered with strictly sterilized food paper, let it cool and form naturally, remove the paper and pack to obtain polyphenol-rich brown sugar;

(7) The clear juice of the secondary membrane is pumped to the clear juice tank of the sugar factory for white sugar production.

The quality of the first-level membrane clear juice, the second-level membrane clear juice and the second-level membrane concentrated juice obtained in this example is shown in Table 1, and the quality of white sugar is shown in Table 2.

Table 1. Quality of sugarcane juice before and after membrane

Table 2. Comparison of various indicators of finished brown sugar

Note: Total sugar is divided into reducing sugar + sucrose

Example 3

A production process of polyphenol-rich black sugar, comprising the steps of:

(1) get the sugarcane that does not remove cane tip and sugarcane leaf as raw material;

(2) Sugarcane is squeezed to obtain mixed juice, and a 50-mesh vibrating sieve is used to remove large particles of sugarcane pulp such as bagasse, and then filtered with a 250-mesh rotary vibrating sieve to remove small particles of impurities to obtain a raw material solution;

(2) Add lime milk to the raw material liquid to adjust the pH to 7.0, then heat it to 55°C through a tubular heat exchanger, pump it to the buffer tank of the raw material tank, and heat it to 80°C with steam to obtain a heated raw material liquid;

(3) Clarify and filter through a 100nm first-level ceramic membrane, with a transmembrane pressure difference of 0.35Mpa, a membrane surface flow rate of 4.5m/s, and a volume concentration factor of 10 to remove most impurities such as bacteria, ash, and colloids in the mixed juice, The first-level membrane clear juice and the first-level membrane filtration concentrate are obtained, and the first-level membrane concentrate is pumped into the raw material liquid after being clarified by the membrane concentrate;

(4) The first-level membrane clear juice is pumped to the second-level membrane feed liquid tank, and filtered through the second-level nanofiltration membrane with a molecular weight cut-off of 5kDa, the transmembrane pressure difference is 0.6Mpa, the membrane surface flow rate is 5m/s, and the filtration temperature is 75 ℃, the volume concentration factor is 10, and the polyphenols in the clear juice of the primary membrane can be effectively retained, and the secondary membrane concentrated juice enriched in polyphenols and the secondary membrane concentrate with low color value and turbidity and high purity can be obtained respectively. Membrane clear juice;

(5) The secondary membrane concentrated juice is concentrated to 62 ° BX through the falling film vacuum evaporation system, and the sugar is boiled in a sandwich iron pot under normal pressure until the sugar cake has a hammer degree of 94 ~ 96 ° BX, and the sugar cake is moved to the auxiliary Crystal box, stir the crystal and pour it into a wooden mold covered with strictly sterilized food paper, let it cool and form naturally, remove the paper and pack to obtain polyphenol-rich brown sugar;

(6) The clear juice of the secondary membrane is pumped to the clear juice tank of the sugar factory for white sugar production.

The quality of the first-level membrane clear juice, the second-level membrane clear juice and the second-level membrane concentrated juice obtained in this embodiment is shown in Table 3, and the quality of brown sugar is shown in Table 4.

Table 3. Quality of sugarcane juice before and after membrane passing

Table 4. Comparison of various indicators of finished brown sugar

Note: Total sugar is divided into reducing sugar + sucrose

Example 4

A production process of polyphenol-rich black sugar, comprising the steps of:

(1) Sugarcane is squeezed to obtain mixed juice, and a 80-mesh vibrating sieve is used to remove large-particle impurities such as bagasse, and then a 300-mesh rotary vibrating sieve is used to remove small-particle impurities to obtain a raw material liquid;

(2) Add lime milk to the raw material liquid to adjust the pH to 7.2, then heat it to 65°C through a tubular heat exchanger, pump it to the buffer tank of the raw material tank, and heat it to 90°C with steam to obtain a heated raw material liquid;

(3) Carry out clarification and filtration through a 200nm first-class ceramic membrane, the transmembrane pressure difference is 0.25Mpa, the membrane surface flow velocity is 5m/s, and the volume concentration multiple is 10, so as to remove most of the impurities such as bacteria, ash, and colloid in the mixed juice, and obtain The first-level membrane clear juice and the first-level membrane filter concentrate, the first-level membrane concentrate is pumped into the raw material liquid after being clarified by the membrane concentrate;

(4) The clear juice of the primary membrane is pumped to the liquid tank of the secondary membrane, and filtered through the secondary membrane with a molecular weight cut-off of 2kDa, the transmembrane pressure difference is 0.8Mpa, the membrane surface flow rate is 4.5m/s, and the filtration temperature is 70°C. The volume concentration multiple is 8, which effectively retains polyphenols in the first-level clear juice, and obtains the second-level membrane concentrated juice enriched in polyphenols and the second-level membrane clear juice with lower color value and turbidity and higher purity;

(5) The secondary membrane concentrated juice is concentrated to 60 ° BX through the falling film vacuum evaporation system, and the sugar is boiled in a sandwich iron pot under normal pressure until the sugar cake has a hammer degree of 94 ~ 96 ° BX, and the sugar cake is moved to the auxiliary Crystal box, stir the crystal and pour it into a wooden mold covered with strictly sterilized food paper, let it cool and form naturally, remove the paper and pack to obtain polyphenol-rich brown sugar;

(6) The clear juice of the secondary membrane is pumped to the clear juice tank of the sugar factory for white sugar production.

The quality of the first-level membrane clear juice, the second-level membrane clear juice and the second-level membrane concentrated juice obtained in this example is shown in Table 5, and the quality of brown sugar is shown in Table 6.

Table 5. Quality of sugarcane juice before and after membrane passing

Table 6. Comparison of various indicators of finished brown sugar

Note: Total sugar is divided into reducing sugar + sucrose.

Claims (3)

1. a kind of production line of richness polyphenol nigecose, its feature is being, including press apparatus, removal of impurities is filtered equipment, pre- ash cylinder, stone Ash breast storage cylinder, pipe heat exchanger, steam heater, primary ceramic membrane, two grades of NF membrane, evaporation concentration equipment, normal pressures concentrate Equipment, crystallization in motion case, mould and nigecose packaging facilities；

Described press apparatus, removal of impurities is filtered equipment, pre- ash cylinder, pipe heat exchanger and steam heater are sequentially connected, lime cream Storage cylinder connects to pre- ash cylinder, and steam heater outlet connects to primary ceramic membrane entrance, the concentrated solution outlet of primary ceramic membrane Connect to pre- ash cylinder through full charge equipment, filter press, the purified liquor outlet of primary ceramic membrane connects to two grades of NF membrane entrances；

Two grades of NF membrane concentrated solution outlets sequentially pass through vacuum evaporation equipment, normal pressure concentrator, crystallization in motion case, mould Connect to nigecose packaging facilities；

Two grades of NF membrane purified liquor outlets connect to white sugar production line；

The aperture of described primary ceramic membrane is 50～200nm, transmembrane pressure 0.25～0.45Mpa, crossflow velocity 4～5m/s, body Long-pending cycles of concentration is 8～12；

The molecular cut off of described two grades of NF membrane is 1～5kDa, and transmembrane pressure is 0.6～1.0Mpa, crossflow velocity 4.5～ 5.5m/s, volume concentration multiple is 8～10.

2. the production line of richness polyphenol nigecose as claimed in claim 1 is it is characterised in that removal of impurities is filtered equipment is 50～100 purposes The combination of the spin vibration sieve of vibrosieve and 200～300 mesh, material adjusts pH to 7.0～7.5 in lime cream storage cylinder, and tubular type is changed The heating-up temperature of hot device is 55～65 DEG C, and the heating-up temperature of steam heater is 80～90 DEG C, and evaporation concentration equipment is falling film type Vacuum vaporation system or atmospheric evaporation system, normal pressure concentrator is interlayer iron pan.

3. the production line of richness polyphenol nigecose as claimed in claim 1 is it is characterised in that described white sugar production line includes connecting successively White sugar vacuum evaporation equipment, cane sugar boiling and crystal equipment, separation equipment, drying plant and the white sugar packaging facilities connecing.