阅读说明：本技术 一种多晶冰糖的煮糖工艺及其系统 (Sugar boiling process and system for polycrystalline rock sugar ) 是由 贺湘 姚志敏 谭玉炼 许林 韦丽雅 于 2021-10-21 设计创作，主要内容包括：本发明涉及一种多晶冰糖的煮糖工艺及其系统,涉及制糖技术领域。该系统包括：换热器,该换热器的糖浆入口通过管道与溶糖间连通；煮糖罐,该煮糖罐的糖浆入口通过管道与换热器的糖浆出口连通,煮糖罐还设有用于排出糖浆的糖浆出口,煮糖罐的二次蒸汽出口通过管道与换热器的蒸汽入口连通；冷凝器,该冷凝器的气体入口通过管道与换热器的气体出口连通,冷凝器的液体出口通过管道与工艺热水箱连通；以及汽水分离器,该汽水分离器连通冷凝器的汽水混合物出口和汽凝水收集箱。该系统通过回收利用多晶冰糖煮糖过程产生的二次蒸汽,利用其热能加热糖浆和工艺冷水,而二次蒸汽通过两次热交换后,其本身也被冷凝成汽凝水,可作为工艺热水得到回收。(The invention relates to a sugar boiling process and a sugar boiling system for polycrystalline rock sugar, and relates to the technical field of sugar production. The system comprises: the syrup inlet of the heat exchanger is communicated with the sugar dissolving chamber through a pipeline; the sugar boiling tank is provided with a syrup outlet for discharging syrup, and a secondary steam outlet of the sugar boiling tank is communicated with the steam inlet of the heat exchanger through a pipeline; a gas inlet of the condenser is communicated with a gas outlet of the heat exchanger through a pipeline, and a liquid outlet of the condenser is communicated with the process hot water tank through a pipeline; and the steam-water separator is communicated with the steam-water mixture outlet of the condenser and the steam condensate collecting box. The system utilizes the heat energy of the secondary steam generated in the process of boiling the polycrystalline rock sugar to heat the syrup and the process cold water by recycling the secondary steam, and the secondary steam is condensed into steam condensate water after twice heat exchange and can be recycled as process hot water.)

1. A sugar boiling system for polycrystalline rock sugar, the sugar boiling system comprising:

the syrup inlet of the heat exchanger is communicated with the sugar dissolving chamber through a pipeline;

the sugar boiling tank is provided with a syrup outlet for discharging syrup, and a secondary steam outlet of the sugar boiling tank is communicated with the steam inlet of the heat exchanger through a pipeline;

a gas inlet of the condenser is communicated with a gas outlet of the heat exchanger through a pipeline, and a liquid outlet of the condenser is communicated with the process hot water tank through a pipeline; and

and the steam-water separator is communicated with the steam-water mixture outlet of the condenser and the steam condensate collecting box.

2. The sugar boiling system of claim 1 wherein the sugar boiling tank is further provided with a steam inlet for feeding steam and the condenser is further provided with a liquid inlet for feeding cold process water.

3. The sugar boiling system of claim 1, wherein the steam-water separator is a pipeline steam-water separator, the pipeline steam-water separator comprising:

the condenser comprises a pipe body, a condenser and a steam-water collecting box, wherein a pipe cavity for steam-water separation is arranged in the pipe body, a steam-water mixture inlet, a liquid outlet and a gas outlet are arranged on the pipe body, the steam-water mixture inlet is communicated with the steam-water mixture outlet of the condenser through a pipeline, the liquid outlet is communicated with the steam-condensed-water collecting box through a pipeline, and the gas outlet is used for discharging mixed gas; and

the partition board is arranged in the pipe cavity and is used for separating the steam-water mixture from the mixed gas;

wherein the liquid outlet is lower than the gas outlet, and the steam-water mixture inlet and the gas outlet are respectively positioned at two sides of the partition plate.

4. Sugar boiling system according to any one of claims 1-3, wherein the moisture separator is further provided with a sight glass for observing moisture separation.

5. A sugar boiling process of polycrystalline rock sugar, characterized in that the sugar boiling system of any one of claims 1-4 is adopted, and the sugar boiling process comprises the following steps:

and (3) concentrating syrup: concentrating the second syrup in the sugar boiling tank to obtain concentrated syrup and secondary steam;

first heat exchange: feeding secondary steam generated by the concentration of the syrup into a heat exchanger through a steam inlet of the heat exchanger, carrying out first heat exchange on the secondary steam and first syrup generated by a sugar dissolving chamber to increase the temperature of the first syrup to form second syrup, reducing the temperature of the secondary steam to form a first steam-water mixture, and feeding the second syrup into the sugar boiling tank through a syrup inlet of the sugar boiling tank to carry out syrup concentration;

second heat exchange: feeding the first steam-water mixture into a condenser through a gas inlet of the condenser, carrying out second heat exchange with process cold water, enabling the temperature of the process cold water to be increased to form process hot water, and enabling the temperature of the first steam-water mixture to be reduced and condensed to form a second steam-water mixture;

steam-water separation: sending the second steam-water mixture into a steam-water separator for steam-water separation to form mixed gas and steam condensate, discharging the mixed gas, and enabling the steam condensate to flow into a steam condensate collecting box;

the temperature of the secondary steam is 115-120 ℃.

6. The sugar boiling process according to claim 5, wherein in the first heat exchange step, the first syrup has a brix of 64-68 ° Bx and a temperature of 45-55 ℃; the temperature of the first vapor-water mixture is 105-115 ℃; the second syrup has a brix of 64-68 ℃ and a temperature of 100-110 ℃.

7. The sugar boiling process as claimed in claim 5, wherein in the concentration step of the syrup, the brix of the concentrated syrup is 78-82 ° Bx, and the temperature is 115-120 ℃; the concentrated syrup is discharged from a syrup outlet.

8. The sugar boiling process according to claim 5, wherein in the second heat exchange step, the temperature of the process cold water is 25-35 ℃, the temperature of the process hot water is 65-75 ℃, and the temperature of the second steam-water mixture is 75-85 ℃.

9. The sugar boiling process according to claim 5, wherein in the steam-water separation step, the mixed gas is cooled to form non-condensable gas and condensed water in the discharging process, and the condensed water flows back to the steam-water separator; the temperature of the steam condensate is 75-85 ℃.

10. The sugar boiling process of claim 5, wherein in the concentration step of the syrup, the concentration is carried out by adopting a steam heating mode, and the heating steam pressure in the sugar boiling tank is 0.6-0.8 MPa.

Technical Field

The invention relates to the technical field of sugar production, in particular to a sugar boiling process and a sugar boiling system for polycrystalline rock sugar.

Background

The rock sugar is a crystal reproduced product of white granulated sugar, is crystal like ice, and has pure quality. The crystal sugar sold on the market at present mainly comprises single crystal sugar, polycrystal crystal sugar, ice-plate sugar and other crystal sugar varieties made according to customer demands, such as coffee crystal sugar, black sugar, crystal sugar powder and the like. The polycrystal rock sugar is also called old rock sugar, soil rock sugar, ice cube sugar and the like, and is irregular crystal rock sugar produced by the traditional process.

The rock sugar can be directly eaten, and also can be used for cooking soup, stewing dishes or making desserts, and the famous rock sugar lotus is a delicious food of the Xiangcai in eight-large dish series; in addition, it also has tonic food such as "rock candy snow pear" and "rock candy bird's nest". The crystal sugar can also be used as high-grade food sweetening agent, medicine-prepared soaking liquor, tonic adjuvant, etc., and can be widely used as high-grade tonic and health product in food and health care industry.

In addition, the traditional Chinese medicine considers that the rock sugar is sweet in taste and neutral in nature, enters lung and spleen channels, and has the effects of tonifying middle-jiao and Qi and moistening lung; the crystal sugar has the effects of nourishing yin, promoting the production of body fluid, moistening lung, and relieving cough, and has good adjuvant treatment effects on cough due to lung dryness, dry cough without phlegm, and expectoration with blood; can be used for treating cough and asthma, infantile malaria, dysentery, aphtha, and toothache due to pathogenic wind-fire caused by lung dryness, lung deficiency, and wind-cold fatigue.

The main consumption areas of the crystal sugar in China are distributed in the east China, the Jingjin China, the south China and the northeast China, wherein the consumption of the east China and the Jingjin China is the largest. From the international market, the rock candy is also a traditional product with Chinese characteristics, and about 40 percent of the domestic rock candy series products are exported at present. The rock sugar can occupy more and more shares in the sugar market by virtue of the unique health-care function of the rock sugar, and has wide development prospect.

From the production of rock sugar, most of the rock sugar is produced in a workshop, so that the quality is unstable and the sanitary condition is not good enough. With the increasingly strict requirement of food hygiene and the increasing market demand, rock sugar factories with certain scales appear in succession, such as Diao food Co., Ltd, Dalian Zoyuan food Co., Ltd, Taiyi food Co., Ltd, Hebei Baoli food Co., Ltd, Lande food Co., Ltd, Jinliu Tan processing factory, Guangxi Lebin food Co., Ltd, Xihaojiang sugar Co., Ltd, Dongguan sugar industry Co., Ltd, etc.

However, unlike white granulated sugar and single crystal sugar production lines, polycrystalline sugar production is periodic with typical batch production characteristics. Therefore, the production process of the domestic polycrystal rock sugar factory is always relatively laggard, the automation degree is low, and the energy consumption is very high. Compared with the advanced steam consumption index of each ton of sugar produced by refined sugar, the steam consumption index of each ton of sugar produced by polycrystalline rock sugar can reach more than 1.2. Under the background of promoting energy conservation and consumption reduction in the world, particularly in 9 months in 2020, the goals of realizing carbon peak reaching in 2030 years and carbon neutralization in 2060 years are announced to the world by China in the great meeting of United nations, and the higher requirements are directly put forward on energy conservation and consumption reduction of domestic modern enterprises. Therefore, for enterprises with high energy consumption, production management is enhanced, equipment and processes are improved, and energy consumption is reduced.

In the production process of the polycrystalline rock sugar, the equipment with the largest steam consumption is a polycrystalline sugar boiling tank which is mainly used for concentrating syrup. For the secondary steam generated after concentration, the traditional polycrystal sugar candy factories directly discharge the secondary steam after exhaust fans (as shown in figure 1), which is undoubtedly great waste and seriously deviates from the original purpose of national energy conservation and emission reduction.

Disclosure of Invention

In order to solve the problems, the invention provides a sugar boiling system for polycrystalline rock sugar, which utilizes heat energy of secondary steam generated in the sugar boiling process of the polycrystalline rock sugar to heat syrup and process cold water by recycling the secondary steam, and the secondary steam is condensed into steam condensate water after twice heat exchange, so that the steam condensate water can be recycled as process hot water, and the recycling of the secondary steam is realized.

In order to achieve the above object, the present invention provides a sugar boiling system for a polycrystalline rock sugar, comprising:

the syrup inlet of the heat exchanger is communicated with the sugar dissolving chamber through a pipeline;

the sugar boiling tank is provided with a syrup outlet for discharging syrup, and a secondary steam outlet of the sugar boiling tank is communicated with the steam inlet of the heat exchanger through a pipeline;

a gas inlet of the condenser is communicated with a gas outlet of the heat exchanger through a pipeline, and a liquid outlet of the condenser is communicated with the process hot water tank through a pipeline; and

and the steam-water separator is communicated with the steam-water mixture outlet of the condenser and the steam condensate collecting box.

The inventor finds that the equipment with the largest steam consumption in the production of the polycrystalline rock sugar is a polycrystalline sugar boiling tank, and in the conventional sugar boiling process, the syrup with the temperature of about 50 ℃ and the sugar brix of 64-68 DEG Bx is heated to the boiling point (about 115-. According to the calculation of material balance and heat balance, the amount of secondary steam generated in the sugar boiling process is the evaporation water amount before and after the concentration of the syrup, the temperature is 115-120 ℃, and considerable energy is contained. The traditional polycrystal crystal sugar factories directly pump the secondary steam away and discharge, which is undoubtedly a great waste. Based on this, the inventor improves the traditional process by introducing a heat exchanger, a condenser and a steam-water separator, and recycles the secondary steam. Staged heat exchange is formed in the sugar boiling system through the heat exchanger and the condenser, primary heat exchange is carried out through the heat exchanger, and secondary steam is used as a heat source, so that the syrup before entering the sugar boiling tank is heated from about 50 ℃ to about 100-110 ℃ or even a boiling point, and is fed at a high temperature or a boiling point, and the use of 0.6-0.8MPa high-pressure steam in the sugar boiling tank is further reduced; carrying out secondary heat exchange through the condenser, and heating the process cold water to about 70 ℃ to a process hot water tank to be used as process hot water; and the secondary steam forms a second steam-water mixture after twice heat exchange, steam-water separation is carried out through a steam-water separator, finally separated mixed gas (mainly non-condensable gas) is discharged, and the steam-condensed water flows into a steam-condensed water collecting box under the action of gravity. The system not only recovers the heat of the secondary steam, but also generates more process hot water for production and use, so that the purpose of saving water is achieved while saving steam in the rock sugar factory.

In one embodiment, the sugar boiling tank is further provided with a steam inlet for feeding steam, and the condenser is further provided with a liquid inlet for feeding cold process water.

In one embodiment, the steam-water separator is a pipeline steam-water separator, and the pipeline steam-water separator comprises:

the condenser comprises a pipe body, a condenser and a steam-water collecting box, wherein a pipe cavity for steam-water separation is arranged in the pipe body, a steam-water mixture inlet, a liquid outlet and a gas outlet are arranged on the pipe body, the steam-water mixture inlet is communicated with the steam-water mixture outlet of the condenser through a pipeline, the liquid outlet is communicated with the steam-condensed-water collecting box through a pipeline, and the gas outlet is used for discharging mixed gas; and

the partition board is arranged in the pipe cavity and is used for separating the steam-water mixture from the mixed gas;

wherein the liquid outlet is lower than the gas outlet.

In one embodiment, the pipeline steam-water separator is made of DN400 pipeline.

In one embodiment, the steam-water separator is also provided with a sight glass for observing the steam-water separation condition.

By adopting the sight glass, an operator can conveniently observe the steam-water separation condition in the steam-water separator.

In one embodiment, the sight glass is a DN150 sight glass.

In one embodiment, the gas outlet of the pipeline steam-water separator is also connected with an upward discharge pipe.

By adopting the discharge pipe, the mixed gas is naturally cooled in the process of being discharged through a longer pipeline, a small amount of steam carried in the mixed gas is condensed to form condensed water, and the condensed water flows back to the steam-water separator, so that further steam recycling is realized.

The invention also provides a sugar boiling process of the polycrystalline rock sugar, and the sugar boiling system comprises the following steps:

and (3) concentrating syrup: concentrating the second syrup in the sugar boiling tank to obtain concentrated syrup and secondary steam;

first heat exchange: feeding secondary steam generated by the concentration of the syrup into a heat exchanger through a steam inlet of the heat exchanger, carrying out first heat exchange on the secondary steam and first syrup generated by a sugar dissolving chamber to increase the temperature of the first syrup to form second syrup, reducing the temperature of the secondary steam to form a first steam-water mixture, and feeding the second syrup into the sugar boiling tank through a syrup inlet of the sugar boiling tank to carry out syrup concentration;

second heat exchange: feeding the first steam-water mixture into a condenser through a gas inlet of the condenser, carrying out second heat exchange with process cold water, enabling the temperature of the process cold water to be increased to form process hot water, and enabling the temperature of the first steam-water mixture to be reduced and condensed to form a second steam-water mixture;

steam-water separation: sending the second steam-water mixture into a steam-water separator for steam-water separation to form mixed gas and steam condensate, discharging the mixed gas, and enabling the steam condensate to flow into a steam condensate collecting box;

the temperature of the secondary steam is 115-120 ℃.

By adopting the process, two heat exchanges are formed in the sugar boiling process, the syrup before entering the sugar boiling tank is heated to be close to the boiling point by utilizing the heat energy of the secondary steam through the first heat exchange, then the process cold water is heated to 65-75 ℃ through the second heat exchange to be used as the process hot water, and the secondary steam is condensed into the steam condensate water after the two heat exchanges, so that the secondary steam can be recycled as the process hot water. The syrup before entering the sugar boiling tank is heated to be close to the boiling point through the first heat exchange and then enters the sugar boiling tank, the steam consumption of the syrup in the heating process in the sugar boiling tank is reduced in the process, and the syrup is further concentrated subsequently.

In one embodiment, the first syrup has a brix of 64-68 Bx and a temperature of 45-55 ℃ in the first heat exchange step; the temperature of the first vapor-water mixture is 105-115 ℃; the second syrup has a brix of 64-68 ℃ and a temperature of 100-110 ℃.

In one embodiment, the first syrup is obtained by first-stage white sugar dissolution.

In one embodiment, in the concentration step of the syrup, the brix of the concentrated syrup is 78-82 ° Bx, and the temperature is 115-120 ℃; the concentrated syrup is discharged from a syrup outlet.

In one embodiment, in the second heat exchange step, the temperature of the process cold water is 25-35 ℃, the temperature of the process hot water is 65-75 ℃, and the temperature of the second steam-water mixture is 75-85 ℃.

In one embodiment, in the steam-water separation step, the mixed gas is cooled during the discharge process to form non-condensable gas and condensed water, and the condensed water flows back to the steam-water separator; the temperature of the steam condensate is 75-85 ℃.

In one embodiment, in the syrup concentrating step, the concentration is carried out by adopting a steam heating mode, and the heating steam pressure in the sugar boiling tank is 0.6-0.8 MPa.

Compared with the prior art, the invention has the following beneficial effects:

the invention relates to a sugar boiling process of polycrystalline rock sugar and a system thereof, wherein the system constructs twice heat exchange in the sugar boiling process by introducing a heat exchanger, a condenser and a steam-water separator, and heats syrup and process cold water by recycling secondary steam generated in the sugar boiling process of the polycrystalline rock sugar and utilizing the heat energy of the secondary steam, and the secondary steam is condensed into steam condensate water after twice heat exchange, so that the secondary steam can be recycled as process hot water. According to the material balance and the heat balance, by adopting the sugar boiling process and the system thereof, the steam-water consumption per ton of the polycrystalline ice sugar factory with the same scale can be reduced to below 1.06, the steam-water consumption per ton is reduced by nearly 0.14 compared with the steam-water consumption per ton of the traditional process of 1.2, and the energy-saving effect is very obvious. Meanwhile, more process hot water is generated for production and use, so that the purpose of saving water is achieved while saving steam in a sugar refinery.

Drawings

FIG. 1 is a process system diagram (10t/h) of a traditional polycrystalline rock sugar boiling section; wherein, 1 is a sugar boiling pot, 2 is a flowmeter, and 3 is an exhaust fan.

FIG. 2 is a system diagram (10t/h) of a process of a boiling section of polycrystalline rock sugar in example 1; wherein, 10 is a heat exchanger, 20 is a sugar boiling tank, 30 is a condenser, 40 is a steam-water separator, and 50 is a steam condensate collecting box.

FIG. 3 is a structural view of a pipe steam-water separator in example 1; wherein 40 is a steam-water separator, 41 is a steam-water mixture inlet, 42 is a liquid outlet of the steam-water separator, 43 is a gas outlet of the steam-water separator, 44 is a partition plate, and 45 is a viewing mirror.

FIG. 4 is a cross-sectional view showing a structure of a condensed water outlet end of the pipeline steam-water separator in example 1; wherein, 40 is the catch water, 42 is the liquid outlet of catch water.

FIG. 5 is a cross-sectional view showing a gas outlet end of the pipeline steam-water separator in example 1; wherein 40 is a steam-water separator, 41 is a steam-water mixture inlet, 43 is a gas outlet of the steam-water separator, and 44 is a partition plate.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Defining:

the heat exchanger of the invention comprises: is a device that transfers part of the heat of a hot fluid to a cold fluid.

A condenser: the device is used for partially or totally condensing gaseous steam into liquid water through a heat exchange mode.

Process cold water: cold water required by the process in production.

Technological hot water: hot water required by the process in production.

A steam-water separator: refers to a device that separates gas and liquid.

Steam condensation water: refers to water condensed from steam.

Sugar brix: refers to the percentage of soluble solids contained in the syrup.

Non-condensable gas: gas which can not be liquefied in the condensing device under certain temperature and pressure conditions.

Condensation water: refers to liquid water formed by the condensation of water vapor (i.e., gaseous water).

Steam consumption per ton of sugar: the tonnage of steam consumed per 1 ton of sugar produced.

Polycrystal rock sugar: refers to an irregular crystal sugar.

The source is as follows:

the materials and parts used in this example are all commercially available sources unless otherwise specified; unless otherwise specified, all the experimental methods are routine in the art.

Example 1

A sugar boiling process and system for polycrystal crystal sugar are provided.

1. Constructing the sugar boiling system.

The sugar boiling system is shown in figure 2 and comprises:

the heat exchanger 10 is provided, and a syrup inlet of the heat exchanger 10 is communicated with the sugar dissolving room through a pipeline;

a sugar boiling tank 20, wherein a syrup inlet of the sugar boiling tank 20 is communicated with a syrup outlet of the heat exchanger 10 through a pipeline, the sugar boiling tank 20 is further provided with a syrup outlet for discharging syrup, a secondary steam outlet of the sugar boiling tank 20 is communicated with a steam inlet of the heat exchanger 10 through a pipeline, and the sugar boiling tank 20 is further provided with a steam inlet for feeding steam;

a gas inlet of the condenser 30 is communicated with a gas outlet of the heat exchanger 10 through a pipeline, a liquid outlet of the condenser 30 is communicated with a process hot water tank through a pipeline, and the condenser 30 is also provided with a liquid inlet used for feeding process cold water; and

and the steam-water separator 40 is communicated with the steam-water mixture outlet of the condenser 30 and the steam condensate collecting box 50 through the steam-water separator 40.

The steam-water separator 40 is a pipeline steam-water separator, and the structure is shown in fig. 3, the cross section structure of the steam condensate outlet end of the pipeline steam-water separator is shown in fig. 4, the cross section structure of the gas outlet end of the pipeline steam-water separator is shown in fig. 5, and the pipeline steam-water separator comprises:

a pipe body, wherein a pipe cavity for steam-water separation is arranged in the pipe body, a steam-water mixture inlet 41, a liquid outlet 42 and a gas outlet 43 are arranged on the pipe body, the steam-water mixture inlet 41 is communicated with a steam-water mixture outlet of the condenser 30 through a pipeline, the liquid outlet 42 is communicated with the steam condensate collecting box 50 through a pipeline, and the gas outlet 43 is used for discharging mixed gas; and

a partition 44, which is arranged in the pipe cavity and is used for separating the steam-water mixture and the mixed gas, and the partition 44 is arranged in the pipe cavity;

wherein the liquid outlet 42 is lower than the gas outlet 43.

In this embodiment the gas outlet 43 of the pipeline separator is also connected to an upward discharge pipe which extends out of the roof.

In the present embodiment, the pipeline steam-water separator 40 is made of a pipeline of DN 400.

The steam-water separator is also provided with a sight glass 45.

In the present embodiment, the sight glass is a DN150 sight glass.

2. A sugar boiling process.

(1) And (3) concentrating syrup: feeding the second syrup with the temperature of 100-; the secondary steam is generated in the sugar boiling concentration process, and the temperature is about 115-120 ℃;

(2) first heat exchange: sending secondary steam generated by concentrating the syrup to a plate heat exchanger for use as a heat source, sending first syrup generated between sugar solutions to the heat exchanger for heat exchange with the secondary steam, heating the first syrup from about 50 ℃ to about 100-;

(3) second heat exchange: the first steam-water mixture enters a plate condenser, heat exchange is carried out between the first steam-water mixture and process cold water at the temperature of 30 ℃, the process cold water is heated to about 70 ℃, the process cold water is discharged into a process hot water tank to be used as process hot water, and the first steam-water mixture is condensed into a second steam-water mixture at the temperature of about 80 ℃;

(4) steam-water separation: and the second steam-water mixture is subjected to steam-water separation through a steam-water separator, mixed gas in the second steam-water mixture is discharged, steam condensate flows into a steam condensate collecting box below under the action of gravity, and the steam condensate is at a temperature of about 80 ℃ and can be used as process hot water.

In order to further reduce the discharge of a small amount of entrained steam in the mixed gas along with the mixed gas, the discharge pipe is lengthened to extend to the roof, and the entrained small amount of steam is condensed in the discharge pipe when meeting cold and flows back to the pipeline steam-water separator. An operator can observe the steam-water separation condition through a sight glass on the steam-water separator.

Examples of the experiments

The ton sugar steam consumption value of example 1 was measured.

1. The detection method comprises the following steps: the method for the whole plant process material balance and the heat balance is adopted, the specific calculation method is detailed in pages 374 to 414 of the fourth volume of the sugarcane sugar making principle and technology, and the calculation principle or the detailed calculation method is detailed in the section of material conservation and heat conservation of the chemical engineering principle.

2. The results show that: the sugar boiling process and the sugar boiling system in the embodiment 1 can enable the steam-water consumption per ton of the polycrystalline ice sugar factory to be reduced to below 1.06, compared with the steam-water consumption per ton of the traditional process of 1.2, the steam-water consumption per ton of the polycrystalline ice sugar factory is reduced by nearly 0.14, and the energy-saving effect of the embodiment 1 is very obvious. Meanwhile, more process hot water is generated for production and use, so that the purpose of saving water is achieved while saving steam in a sugar refinery.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.