Efficient preparation production line for sugarcane plant water

Abstract

The invention provides an efficient preparation production line for sugarcane plant water, and relates to the technical field of sugarcane deep processing. Comprising a preparation section and a purification section which are connected in sequence, the preparation section comprises a first concentration tank, a second concentration tank, a third concentration tank and a fourth concentration tank which are connected in sequence, and all the tank bodies are connected in series through liquid pipelines with pumps and connected with steam pipelines, so that cyclic utilization of heat energy is achieved; the purification section comprises a raw water tank, an activated carbon treatment unit, an RO (Reverse Osmosis) treatment unit, a pure water tank, an ozone tower treatment unit and a high-temperature sterilization treatment unit which are sequentially connected along the material flow direction. By means of the reasonable structural design and the innovative technical scheme, efficient preparation and deep purification of the sugarcane plant water are achieved, remarkable technical advantages and market competitiveness are achieved, and reliable technical support is provided for large-scale industrial production of the sugarcane plant water.

Description

[Technical field]

[0001] The invention relates to the technical field of sugarcane deep processing, and in particular to a production line for efficiently preparing sugarcane plant water. [Background technology]

[0002] Sugarcane, as a crop widely grown in tropical and subtropical regions, not only occupies an important position in the food industry, but also has diverse uses in many fields such as energy, medicine, and agriculture. The improvement of its planting technology and the innovation of its processing technology are constantly expanding the utilization value of sugarcane. Traditionally, sugarcane is mainly used for sugar production and fresh food, but with the development of science and technology, its application in biofuels, environmentally friendly materials, etc. has gradually attracted attention. For example, sugarcane bagasse is used to make environmentally friendly particles and cultivate edible fungi, while sugarcane leaves can be used as animal feed or for the production of paper and fiberboard. In addition, the medicinal value of sugarcane cannot be ignored. The various amino acids and trace elements in its stem juice have a certain tonic effect. In terms of planting, choosing suitable varieties and scientific management methods are crucial to improving the yield and quality of sugarcane. With the in-depth exploration of sugarcane resources, its potential economic and ecological value will be further released, providing new impetus for sustainable development.

[0003] Sugarcane plant water is an innovative natural beverage successfully developed by our company in collaboration with a scientific research team from universities after years of scientific research. It retains the natural nutrients and unique flavor of sugarcane to the greatest extent. Unlike traditional beverages, it is natural and healthy, with a fresh and soft taste and a sweet aftertaste. Its launch not only fills the gap in the domestic sugarcane plant water beverage market, but also provides consumers with a new choice of healthy beverages, satisfying modern people's pursuit of healthy and natural beverages. As a forward-looking product, the development of sugarcane plant water reflects our company's innovative concept of in-depth development and comprehensive utilization of sugarcane resources, and also demonstrates our determination and strength in promoting the development of the sugarcane industry towards high value and diversification.

[0004] Because sugarcane plant water is a new product of our company, on the one hand, there is a lack of special processes and devices in the existing technology to achieve large-scale preparation of sugarcane plant water. At the same time, traditional concentration devices also have certain deficiencies in thermal energy utilization. Steam is often directly discharged after use, resulting in heat energy waste, increased production costs, and low resource utilization. On the other hand, sugarcane plant water cannot be directly filled into products after extraction and preparation. A series of processing processes are required. The existing technology lacks special processes and devices to achieve large-scale purification of sugarcane plant water.

[0005] Therefore, a new production device and preparation method are needed to solve the problem of sugarcane plant water preparation and purification, accelerate the industrialization of new products, and at the same time, this equipment should have energy-saving characteristics and adapt to large-scale production needs. [Summary of the invention]

[0006] The purpose of the invention is to provide a sugarcane plant water efficient preparation production line to address the problem of lack of specialized large-scale preparation and purification process and device for sugarcane plant water in the prior art. The production line aims to achieve efficient preparation and deep purification of sugarcane plant water. A preparation method for sugarcane plant water is also provided to improve thermal energy utilization and comprehensive resource utilization, reduce production costs, meet large-scale production needs, and accelerate the industrialization process of sugarcane plant water.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0009] 1. The present invention realizes the large-scale extraction of sugarcane plant water in industry for the first time through the design of a four-effect distillation and concentration device. It adopts a unique pipeline connection and condensate collection method to continuously prepare and obtain high-purity sugarcane plant water in industrial production for the first time. It is the first time to collect the steam condensate produced by the second concentration tank and the third concentration tank as sugarcane plant water, and the first time to realize the directional enrichment of volatile components in the sugarcane processing process. Because the steam in the first concentration tank contains more water, the content of volatile components and beneficial components is low, which is not conducive to development; and the fourth concentration tank has a low content of volatile components, a high concentration of sugarcane juice and a poor taste, which are not suitable for collection.

[0010] After preparing sugarcane plant water, the water is designed according to the characteristics of sugarcane water. The raw water tank, activated carbon treatment unit, RO reverse osmosis treatment unit, pure water tank, ozone tower treatment unit and high-temperature sterilization treatment unit are arranged in sequence along the material flow direction to achieve deep purification of sugarcane plant water. Activated carbon treatment effectively absorbs organic matter and odor, RO reverse osmosis accurately filters impurities and harmful substances, and ozone tower and high-temperature sterilization treatment ensure thorough sterilization, which guarantees the purity and safety of sugarcane plant water and meets the market requirements for high-quality beverages.

[0011] 2. The steam from the fourth concentrator enters the first concentrator for preheating, and there is almost no hot steam discharged from the entire device. Based on the closed-loop steam circuit design of the four-effect concentrator (the fourth concentrator → the first concentrator), the low-temperature waste heat is used to participate in the material preheating, which fundamentally solves the energy waste problem caused by the direct discharge of the last-effect steam in the traditional evaporation system. Compared with the one-way steam process, this design achieves a breakthrough improvement in the overall thermal efficiency of the system through heat recycling and reuse. The four-effect distillation concentration device adopts a unique pipeline connection and heat recovery design. The steam is recycled in the system, and there is no direct discharge of hot steam. The heat utilization rate is high, which effectively reduces energy consumption and production costs. The steam pipeline between each concentrator is equipped with a self-acting pressure regulating valve to maintain the pressure gradient of 1.4~1.6→1.3~1.5→0.9~1.2→0.6~0.8bar, which further optimizes the thermal energy utilization efficiency.

[0012] The three-way valves, pumps, valves, pressure regulating valves and other devices installed on each pipeline enable the entire production process to be flexibly controlled, easy to operate, and stable in operation. Precise parameter control can be performed according to actual production needs, ensuring the efficient preparation and stable production of sugarcane plant water.

[0013] 3. Innovative reverse cleaning system: The reverse cleaning system designed for the water characteristics of sugarcane plants combines acid cleaning, alkali cleaning and hot water flushing to effectively remove pollutants on the surface of the RO membrane, extend the membrane life and reduce equipment maintenance costs. The acid cleaning liquid flow rate is 1.2m 3 / h, and the circulation pressure is 2.5MPa, which ensures the long-term stable operation of the equipment. A security filter with a filtration accuracy of 5-10μm is installed between the activated carbon treatment unit and the RO reverse osmosis treatment unit to further filter the sugarcane plant water after the activated carbon treatment to prevent impurities from entering the RO reverse osmosis treatment unit, further ensuring the long-term stable operation of the equipment.

[0014] 4. Equipped with a five-way switching valve group and a PLC controller to automate the cleaning process. By monitoring the parameters such as the conductivity and flow rate of the RO unit water, the acid cleaning, alkali cleaning or hot water flushing procedures are automatically triggered, which improves the cleaning efficiency and reliability, reduces manual errors and labor intensity, and adapts to large-scale production needs.

Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a device for integrating sugarcane juice concentration and sugarcane plant water co-production according to the present invention;

[0016] Figure 2 It is a structural schematic diagram of the preparation section of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of another preferred embodiment of the collecting tank for the preparation section of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the purification section of the present invention;

[0019] Figure 5 This is a schematic diagram of the switching valve group structure of the purification section of the present invention;

[0020] In the figure: 1-first concentration tank; 2-second concentration tank; 3-third concentration tank; 4-fourth concentration tank; 7-collection tank; 8-steam pipeline; 11-transport pipe, 12-raw water tank, 13-activated carbon treatment unit, 14-hot water unit, 15-acid washing unit, 16-alkali washing unit, 17-RO reverse osmosis treatment unit, 18-pure water tank, 19-ozone tower treatment unit, 20-high temperature sterilization treatment unit, 21-switching valve group, 51-first pipeline; 52-second pipeline; 53-third pipeline; 54 - the fourth pipeline; 55 - the fifth pipeline; 56 - the sixth pipeline; 57 - the seventh pipeline; 58 - the eighth pipeline; 61 - the first condenser; 62 - the second condenser; 71 - the filtering device; 91 - the liquid pipeline; 92 - the feed pipe; 93 - the discharge pipe, 121 - the second pipeline with pump, 131 - the third pipeline with pump, 141 - the hot water pipeline, 151 - the pickling pipeline, 161 - the alkali washing pipeline, 171 - the first connecting pipe, 181 - the fourth pipeline with pump, 191 - the fifth pipeline with pump, 201 - the liquid outlet pipe. [Specific implementation method]

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] Example 1

[0025] A highly efficient production line for preparing sugarcane plant water, comprising a preparation section and a purification section connected in sequence;

[0026] The preparation section includes a first concentrator 1, a second concentrator 2, a third concentrator 3 and a fourth concentrator 4 which are connected in sequence. Each tank body is connected in series through a liquid pipeline 91 with a pump and is connected to a steam pipeline 8 to realize the recycling of heat energy. The upper part of the first concentrator 1 is connected to the lower part of the second concentrator 2 through a first pipeline 51. The upper part of the second concentrator 2 is connected to the inlet of the first condenser 61 through a second pipeline 52, the gas outlet of the first condenser 61 is connected to the lower part of the third concentrator 3 through a sixth pipeline 56, and the condensate outlet of the first condenser 61 is connected to the collection tank 7 through a fifth pipeline 55. The upper part of the third concentrator 3 is connected to the inlet of the second condenser 62 through a third pipeline 53, the gas outlet of the second condenser 62 is connected to the lower part of the fourth concentrator 4 through an eighth pipeline 58, and the condensate outlet of the second condenser 62 is connected to the collection tank 7 through a seventh pipeline 57, and is filtered by a filtering device 71 before being connected to the collection tank 7. The upper part of the fourth concentrator 4 is connected to the lower part of the first concentrator 1 through a fourth pipeline 54.

[0027] The purification section includes a raw water tank 12, an activated carbon treatment unit 13, an RO reverse osmosis treatment unit 17, a pure water tank 18, an ozone tower treatment unit 19 and a high-temperature sterilization treatment unit 20 which are sequentially connected along the material flow direction. The inlet of the raw water tank 12 is connected to a delivery pipe 11, and the delivery pipe 11 is connected to the outlet of the collection tank 7. A pump and a valve are provided on the delivery pipe 11; the activated carbon treatment unit 13 is connected to the outlet of the raw water tank 12 through a second pumped pipeline 121, the water inlet of the RO reverse osmosis treatment unit 17 is connected to the outlet of the activated carbon treatment unit 13 through a third pumped pipeline 131, and its water outlet is connected to the inlet of the pure water tank 18 through a first connecting pipe 171, the outlet of the pure water tank 18 is connected to the inlet of the ozone tower treatment unit 19 through a fourth pumped pipeline 181, the outlet of the ozone tower treatment unit 19 is connected to the inlet of the high-temperature sterilization treatment unit 20 through a fifth pumped pipeline 191, and the outlet of the high-temperature sterilization treatment unit 20 is connected to a liquid outlet pipe 201.

[0028] Example 2

[0029] On the basis of Example 1, in the further optimized production line for efficient preparation of sugarcane plant water, each steam pipe 8 connected to the first concentrating tank 1, the second concentrating tank 2, the third concentrating tank 3 and the fourth concentrating tank 4 is provided with a control valve or valve. The first concentrating tank 1 is provided with a feed pipe 92, and the fourth concentrating tank 4 is provided with a discharge pipe 93. The collecting tank 7 is provided with a discharge port connected to the delivery pipe 11. The first pipeline 51, the second pipeline 52, the third pipeline 53 and the fourth pipeline 54 are provided with a three-way valve. The delivery pipe 11 is provided with a pump and a valve. The liquid pipeline 91 between each adjacent tank body of the first concentrating tank 1, the second concentrating tank 2, the third concentrating tank 3 and the fourth concentrating tank 4 is respectively provided with a pump and a valve. Before the fifth pipeline 55 and the seventh pipeline 57 are connected to the collecting tank 7, a filter device 71 is provided, and the outlet of the filter device 71 is connected to the inlet of the collecting tank 7. The first pipeline 51, the second pipeline 52, the third pipeline 53 and the fourth pipeline 54 are provided with a pressure regulating valve.

[0030] Example 3

[0031] On the basis of Example 1 or Example 2, in order to achieve efficient cleaning of the RO reverse osmosis treatment unit 17, the device also includes a reverse cleaning system. The water inlet end of the RO reverse osmosis treatment unit 17 is also provided with a concentrated water outlet. The reverse cleaning system includes a hot water unit 14, a pickling unit 15, and an alkaline cleaning unit 16. The hot water unit 14 is connected to the water outlet of the RO reverse osmosis treatment unit 17 through the seventh pipe 141. The pickling unit 15 is connected to the water outlet of the RO reverse osmosis treatment unit 17 through the eighth pipe 151. The alkaline cleaning unit 16 is connected to the water outlet of the RO reverse osmosis treatment unit 17 through the ninth pipe 161. The cleaning water of the reverse cleaning system is discharged through the concentrated water outlet.

[0032] The reverse cleaning system further includes a switching valve group 21, which is disposed between the water production port and the first connecting pipe 171 and is also connected to the hot water unit 14, the acid cleaning unit 15 and the alkaline cleaning unit 16. The switching valve group is a five-way valve.

[0033] In specific implementation, the sugarcane juice is first fed into the first concentrating tank 1 through the feed pipe 92 of the first concentrating tank 1, and then steam is fed into each concentrating tank through the steam pipe 8. The liquid pipe 91 with a pump can pump the sugarcane juice in the previous concentrating tank into the next concentrating tank, and the steam heats and concentrates the sugarcane juice. After the sugarcane juice in the fourth concentrating tank 4 is concentrated, it is transported to the next process through the discharge pipe 93.

[0034] During the heating process, the steam generated by the first concentrator 1 enters the second concentrator 2 through the first pipe 51 to preheat and concentrate the sugarcane juice in the second concentrator 2. The steam generated by the second concentrator 2 enters the first condenser 61 through the second pipe 52 for condensation, and the condensed liquid is the sugarcane plant water, which flows into the collection tank 7 through the fifth pipe 55. The uncondensed gas enters the third concentrator 3 through the sixth pipe 56 to preheat and concentrate the sugarcane juice in the third concentrator 3. The steam generated by the third concentrator 3 enters the second condenser 62 through the third pipe 53 for condensation, and the condensed liquid is the sugarcane plant water, which also flows into the collection tank 7, and the uncondensed gas enters the fourth concentrator 4 through the eighth pipe 58. The steam generated by the fourth concentrator 4 returns to the first concentrator 1 through the fourth pipe 54 for recycling, thereby realizing efficient utilization of thermal energy.

[0035] During the whole process, the three-way valves, pumps, valves and pressure regulating valves on each pipeline can be adjusted and controlled according to the actual production situation to ensure stable and efficient production. The sugarcane plant water in the collection tank 7 can be transported to the next link through the discharge port and the delivery pipe 11 for further processing or packaging. The filtering device 71 can filter the condensate flowing into the collection tank 7 to ensure the purity of the sugarcane plant water.

[0036] The raw liquid of sugarcane plant water enters the raw water tank 12 from the collection tank 7 through the delivery pipe 11, and flows into the activated carbon treatment unit 13 in sequence after temporary storage, and uses the adsorption of activated carbon to remove organic matter and odor, and then enters the RO reverse osmosis treatment unit 17 to intercept and remove most of the soluble salts, small molecular organic matter, bacteria, viruses and other impurities in the water to obtain high-purity sugarcane plant water. The purified water after RO reverse osmosis treatment flows into the pure water tank 18 for temporary storage, and is transported to the ozone tower treatment unit 19 through the fourth belt pump pipeline 181, and uses the strong oxidizing property of ozone to kill residual bacteria, viruses and other microorganisms, decompose organic pollutants, and further improve water quality. The sugarcane plant water after ozone treatment then enters the high-temperature sterilization treatment unit 20 for heating and sterilization, completely killing residual microorganisms to ensure that the product meets commercial sterility standards, and then can enter the next process such as filling process.

[0037] When the RO reverse osmosis treatment unit 17 needs to be cleaned, the switching valve group 21 (five-way valve) is used to switch between different cleaning modes: during normal operation, water flows through the water outlet and the first connecting pipe 171 into the subsequent treatment unit; when cleaning is required, the switching valve group connects the water outlet with one of the hot water unit 14, the acid washing unit 15, and the alkaline washing unit 16, so that the cleaning liquid flows back into the RO reverse osmosis treatment unit 17, completing the acid washing, alkaline washing or hot water washing operation, removing pollutants on the membrane surface, and the cleaning water of the reverse cleaning system is discharged through the concentrated water outlet, thereby extending the service life of the membrane.

[0038] Example 4

[0039] On the basis of Examples 1-3, in the further optimized sugarcane plant water efficient preparation production line, in the preparation section, the steam pipeline 8 between each concentration tank is provided with a self-operated pressure regulating valve to maintain the pressure gradient as follows:

[0040] 1.4~1.6→1.3~1.5→0.9~1.2→0.6~0.8bar.

[0041] The more optimal pressure gradient is 1.5→1.2→0.9→0.6 bar, and the steam cycle efficiency is ≥90%.

[0042] In the reverse cleaning step, the pickling liquid flow rate is 1.2m 3 / h, the circulation pressure is 2.5MPa, and the membrane flux recovery rate after cleaning is ≥95%.

[0043] In the high temperature instantaneous sterilization step, the residence time of the material in the holding tube is 45±5 seconds, and the furfural retention rate is ≥93%.

[0044] The plant water stock solution undergoes activated carbon adsorption, RO reverse osmosis (working pressure 2.0MPa), ozone oxidation (0.8ppm), and high-temperature instantaneous sterilization (93℃ / 45s) in sequence.

[0045] When the RO membrane flux dropped to the set value, 2% citric acid solution (45° C.) was pumped in reverse for cleaning for 30 minutes.

[0046] In specific implementation, the pressure gradient is maintained at 1.4-1.6 → 1.3-1.5 → 0.9-1.2 → 0.6-0.8 bar by controlling the self-operated pressure regulating valve on the steam pipe 8 between each concentrator to optimize the thermal energy utilization efficiency. During the reverse cleaning process, the pickling liquid flow rate is controlled to 1.2m 3 / h, the circulating pressure is 2.5MPa, ensuring that the membrane flux recovery rate after cleaning is ≥95% to maintain the efficient operation of the RO reverse osmosis treatment unit 17. In the high-temperature instantaneous sterilization step, the residence time of the material in the holding tube is controlled to be 45±5 seconds to ensure that the furfural retention rate is ≥93% to ensure product quality. The plant water stock solution undergoes activated carbon adsorption, RO reverse osmosis (working pressure 2.0MPa), ozone oxidation (0.8ppm), and high-temperature instantaneous sterilization (93℃ / 45s) in turn to achieve deep purification. When the RO membrane flux drops to the set value, 2% citric acid solution (45℃) is pumped in reverse for 30 minutes to restore the performance of the membrane.

[0047] Example 5

[0048] A method for preparing sugarcane plant water using the sugarcane plant water efficient preparation production line described in any one of Examples 1 to 4 comprises the following steps:

[0049] a. Concentration of sugarcane juice: The sugarcane juice is sequentially passed through a first concentration tank 1, a second concentration tank 2, a third concentration tank 3 and a fourth concentration tank 4 for four-effect distillation concentration, each concentration tank is connected to a steam pipeline 8, and the concentrated sugarcane juice is transported through a liquid pipeline 91 with a pump connected in series between each concentration tank;

[0050] b. Plant water collection: The steam generated during the concentration process of the second concentration tank 2 and the third concentration tank 3 is condensed by the first condenser 61 and the second condenser 62 to obtain condensed liquid as sugarcane plant water, which is collected to the collection tank 7 through the fifth pipeline 55 and the seventh pipeline 57 respectively, and filtered by the filtering device 71 before being connected to the collection tank 7;

[0051] c. Plant water purification: The sugarcane plant water in the collection tank 7 is sequentially passed through the raw water tank 12, the activated carbon treatment unit 13, the RO reverse osmosis treatment unit 17, the pure water tank 18, the ozone tower treatment unit 19 and the high-temperature sterilization treatment unit 20 for deep purification to obtain high-quality sugarcane plant water.

[0052] In step a, the first concentrator 1 is provided with a feed pipe 92 for inputting sugarcane juice, and the fourth concentrator 4 is provided with a discharge pipe 93 for outputting concentrated sugarcane juice; the material flow direction and pressure in each pipeline are controlled by the three-way valve and pressure regulating valve arranged on the first pipeline 51, the second pipeline 52, the third pipeline 53 and the fourth pipeline 54; the input flow rate and pressure of sugarcane plant water are controlled by the pump and valve arranged on the conveying pipe 11; in the preparation section, the steam pipeline 8 between the first concentrator 1, the second concentrator 2, the third concentrator 3 and the fourth concentrator 4 is provided with a self-operated pressure regulating valve to maintain the pressure gradient of 1.4-1.6→1.3-1.5→0.9-1.2→0.6-0.8 bar. The more preferred pressure gradient is 1.5→1.2→0.9→0.6 bar, and the steam cycle efficiency is ≥90%.

[0053] In step c, the step of reverse cleaning the RO reverse osmosis treatment unit 17 is also included. The hot water unit 14, the acid cleaning unit 15 or the alkaline cleaning unit 16 are connected to the water outlet of the RO reverse osmosis treatment unit 17 through the switching valve group 21, so that the cleaning liquid flows into the RO reverse osmosis treatment unit 17 in reverse, and the waste water after cleaning is discharged through the concentrated water outlet; the switching valve group 21 is a five-way valve, and the cleaning mode is automatically switched according to preset conditions by the PLC controller to realize automatic control of acid cleaning, alkaline cleaning and hot water flushing.

[0054] In step c, the high temperature sterilization treatment unit 20 comprises a plate heat exchanger and a holding tube connected in series, the plate heat exchanger heats the material to 90-95°C, the holding tube length is 10-15 meters, the residence time is 30-60 seconds, and the sugarcane plant water is subjected to high temperature instantaneous sterilization treatment.

[0055] In step c, a security filter with a filtration accuracy of 5-10 μm is provided between the activated carbon treatment unit 13 and the RO reverse osmosis treatment unit 17 to further filter the sugarcane plant water after the activated carbon treatment to prevent impurities from entering the RO reverse osmosis treatment unit 17 .

[0056] Under normal operating conditions, the solenoid valve connects the water outlet with the first connecting pipe, so that the water treated by RO reverse osmosis flows to the subsequent treatment unit; when cleaning is required, the PLC controller issues a command, and the solenoid valve automatically switches to the corresponding cleaning mode, connecting the water outlet with the acid cleaning unit, alkaline cleaning unit or hot water unit respectively, so that the cleaning liquid flows back into the RO reverse osmosis treatment unit. After completing the cleaning operation, the waste liquid is discharged through the concentrated water outlet.

[0057] The control method of the five-way valve 21 includes:

[0058] When the conductivity of the produced water of the RO unit is greater than 50 μS / cm, the unit is switched to the acid cleaning unit 15 for acid cleaning;

[0059] When the water production flow rate is less than 70% of the initial value, switch to the alkali washing unit 16 for alkali washing;

[0060] After completing five acid or alkali washes, the hot water unit 14 is switched to perform hot water washing.

[0061] In another embodiment, the control method of the five-way valve 21 may further include:

[0062] After each batch of continuous production is completed, the pickling unit 15 is switched to pickling;

[0063] When the pickling is completed, switch to the alkali washing unit 16 for alkali washing;

[0064] When the alkaline cleaning is completed, the hot water unit 14 is switched to perform hot water washing.

[0065] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A sugarcane plant water efficient production line, characterized in that: It includes a preparation section and a purification section connected in sequence; The preparation section comprises a first concentrating tank (1), a second concentrating tank (2), a third concentrating tank (3) and a fourth concentrating tank (4) which are connected in sequence. The tanks are connected in series via a liquid pipeline (91) with a pump and are all connected to a steam pipeline (8) to achieve the recycling of heat energy. The upper part of the first concentrating tank (1) is connected to the lower part of the second concentrating tank (2) via a first pipeline (51); the upper part of the second concentrating tank (2) is connected to the inlet of the first condenser (61) via a second pipeline (52); the gas outlet of the first condenser (61) is connected to the lower part of the third concentrating tank (3) via a sixth pipeline (56). The condensate outlet of the first condenser (61) is connected to the collecting tank (7) through a fifth pipe (55); the upper part of the third concentrating tank (3) is connected to the inlet of the second condenser (62) through a third pipe (53); the gas outlet of the second condenser (62) is connected to the lower part of the fourth concentrating tank (4) through an eighth pipe (58); the condensate outlet of the second condenser (62) is connected to the collecting tank (7) through a seventh pipe (57), and is filtered by a filtering device (71) before being connected to the collecting tank (7); the upper part of the fourth concentrating tank (4) is connected to the lower part of the first concentrating tank (1) through a fourth pipe (54); The purification section comprises a raw water tank (12), an activated carbon treatment unit (13), an RO reverse osmosis treatment unit (17), a pure water tank (18), an ozone tower treatment unit (19) and a high-temperature sterilization treatment unit (20) which are sequentially connected along the material flow direction. The inlet of the raw water tank (12) is connected to a delivery pipe (11), the delivery pipe (11) is connected to the outlet of the collection tank (7), and a pump and a valve are arranged on the delivery pipe (11); the activated carbon treatment unit (13) is connected to the outlet of the raw water tank (12) via a second pumped pipeline (121), and the RO The water inlet of the reverse osmosis treatment unit (17) is connected to the outlet of the activated carbon treatment unit (13) through a third pumped pipe (131), and its water outlet is connected to the inlet of the pure water tank (18) through a first connecting pipe (171). The outlet of the pure water tank (18) is connected to the inlet of the ozone tower treatment unit (19) through a fourth pumped pipe (181). The outlet of the ozone tower treatment unit (19) is connected to the inlet of the high-temperature sterilization treatment unit (20) through a fifth pumped pipe (191). The outlet of the high-temperature sterilization treatment unit (20) is connected to the liquid outlet pipe (201).

2. The sugarcane plant water efficient preparation production line according to claim 1, characterized in that: The first concentrating tank (1) is provided with a feed pipe (92), and the fourth concentrating tank (4) is provided with a discharge pipe (93); the first pipeline (51), the second pipeline (52), the third pipeline (53) and the fourth pipeline (54) are provided with a three-way valve and a pressure regulating valve; and the liquid pipeline (91) between each adjacent tank body of the first concentrating tank (1), the second concentrating tank (2), the third concentrating tank (3) and the fourth concentrating tank (4) is provided with a pump and a valve respectively.

3. The sugarcane plant water efficient preparation production line according to claim 1, characterized in that: The water inlet end of the RO reverse osmosis treatment unit (17) is also provided with a concentrated water outlet. The RO reverse osmosis treatment unit (17) is provided with a reverse cleaning system, which comprises a hot water unit (14), an acid cleaning unit (15), and an alkali cleaning unit (16). The hot water unit (14) is connected to the water outlet of the RO reverse osmosis treatment unit (17) via a seventh pipeline (141); the acid cleaning unit (15) is connected to the water outlet of the RO reverse osmosis treatment unit (17) via an eighth pipeline (151); the alkali cleaning unit (16) is connected to the water outlet of the RO reverse osmosis treatment unit (17) via a ninth pipeline (161), and the cleaning liquid is discharged from the concentrated water outlet.

4. The sugarcane plant water efficient preparation production line according to claim 3, characterized in that: It also includes a switching valve group (21), which is arranged between the water production port and the first connecting pipe (171), and is also connected to the hot water unit (14), the acid washing unit (15) and the alkali washing unit (16).

5. A method for preparing sugarcane plant water using the sugarcane plant water efficient preparation production line according to any one of claims 1 to 4, characterized in that: The following steps are involved: a. Concentrating sugarcane juice: The sugarcane juice is sequentially passed through a first concentration tank (1), a second concentration tank (2), a third concentration tank (3) and a fourth concentration tank (4) for four-effect distillation concentration, each concentration tank is connected to a steam pipeline (8), and the concentrated sugarcane juice is transported through a liquid pipeline (91) with a pump connected in series between each concentration tank; b. Plant water collection: The steam generated during the concentration process of the second concentration tank (2) and the third concentration tank (3) is condensed by the first condenser (61) and the second condenser (62) to obtain condensed liquid as sugarcane plant water, which is collected to the collection tank (7) through the fifth pipe (55) and the seventh pipe (57) respectively, and filtered by the filtering device (71) before being connected to the collection tank (7); c. Plant water purification: The sugarcane plant water in the collection tank (7) is sequentially passed through a raw water tank (12), an activated carbon treatment unit (13), an RO reverse osmosis treatment unit (17), a pure water tank (18), an ozone tower treatment unit (19) and a high-temperature sterilization treatment unit (20) for deep purification to obtain high-quality sugarcane plant water.

6. The method for preparing sugarcane plant water according to claim 5, characterized in that: In step a, the first concentrating tank (1) is provided with a feed pipe (92) for inputting sugarcane juice, and the fourth concentrating tank (4) is provided with a discharge pipe (93) for outputting concentrated sugarcane juice; the material flow direction and pressure in each pipeline are controlled by three-way valves and pressure regulating valves arranged on the first pipeline (51), the second pipeline (52), the third pipeline (53) and the fourth pipeline (54); the input flow rate and pressure of sugarcane plant water are controlled by pumps and valves arranged on the conveying pipe (11); in the preparation section, the steam pipeline (8) between the first concentrating tank (1), the second concentrating tank (2), the third concentrating tank (3) and the fourth concentrating tank (4) is provided with a self-operated pressure regulating valve to maintain a pressure gradient of 1.4-1.6 → 1.3-1.5 → 0.9-1.2 → 0.6-0.8 bar.

7. The method for preparing sugarcane plant water according to claim 5, characterized in that: In step c, the method further comprises the step of reverse cleaning the RO reverse osmosis treatment unit (17), wherein the hot water unit (14), the acid cleaning unit (15) or the alkali cleaning unit (16) is connected to the water outlet of the RO reverse osmosis treatment unit (17) through a switching valve group (21), so that the cleaning liquid flows in the reverse direction into the RO reverse osmosis treatment unit (17), and the waste water after cleaning is discharged through the concentrated water outlet; the switching valve group (21) is a five-way valve, and the cleaning mode is automatically switched according to preset conditions by a PLC controller, thereby realizing automatic control of acid cleaning, alkali cleaning and hot water flushing.

8. The method for preparing sugarcane plant water according to claim 7, characterized in that: The control method of the five-way valve (21) comprises: When the conductivity of the produced water of the RO unit is greater than 50 μS / cm, switching to the acid washing unit (15) for acid washing; When the water production flow rate is less than 70% of the initial value, switching to the alkali washing unit (16) for alkali washing; After completing five acid or alkali washes, switch to the hot water unit (14) for hot water washing.

9. The method for preparing sugarcane plant water according to claim 5, characterized in that: In step c, the high temperature sterilization treatment unit (20) comprises a plate heat exchanger and a holding tube connected in series, the plate heat exchanger heats the material to 90-95° C., the holding tube is 10-15 meters long, and the residence time is 30-60 seconds, so as to perform high temperature instantaneous sterilization treatment on the sugarcane plant water.

10. The method for preparing sugarcane plant water according to claim 5, characterized in that: In step c, a security filter is provided between the activated carbon treatment unit (13) and the RO reverse osmosis treatment unit (17) with a filtration accuracy of 5-10 μm to further filter the sugarcane plant water after the activated carbon treatment to prevent impurities from entering the RO reverse osmosis treatment unit (17).

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