A sugarcane plant water high-efficiency preparation production line

Abstract

The application provides a sugarcane plant water efficient preparation production line, and relates to the technical field of deep processing of sugarcane. The production line comprises a preparation section and a purification section which are connected in sequence. The preparation section comprises first, second, third and fourth concentration tanks which are connected in sequence. The tanks are connected in series through liquid pipelines with pumps, and are connected with steam pipelines to realize the recycling of heat energy. The purification section comprises raw water tanks, activated carbon treatment units, RO reverse osmosis treatment units, pure water tanks, ozone tower treatment units and high-temperature sterilization treatment units which are connected in sequence along the material flow direction. Through reasonable structural design and innovative technical scheme, the application realizes the efficient preparation and deep purification of sugarcane plant water, has significant technical advantages and market competitiveness, and provides reliable technical support for the large-scale industrial production of sugarcane plant water.

Description

[0001] The present application relates to the technical field of sugarcane deep processing, in particular to a high-efficiency production line for preparing sugarcane plant water.

[0002] Sugarcane, widely cultivated in tropical and subtropical regions, not only plays an important role in the food industry, but also shows diversified applications in energy, medicine, agriculture and other fields. The improvement of planting technology and innovation of processing technology continuously expand the utilization value of sugarcane. Traditionally, sugarcane is mainly used for sugar and fresh food, but with the development of science and technology, its application in biofuels, environmental materials and other aspects has also gradually attracted attention. For example, sugarcane residue is used to make environmentally friendly particles and cultivate edible fungi, and sugarcane leaves can be used as animal feed or to produce paper and fiberboard. In addition, the medicinal value of sugarcane cannot be ignored, and various amino acids and trace elements in its stem juice have certain tonifying effects. In terms of planting, choosing suitable varieties and scientific management methods are crucial to improve 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 drink developed by our company in cooperation with scientific research teams from universities after years of research and development. It maximally retains the natural nutrients and unique flavor of sugarcane. Unlike traditional drinks, it is natural, healthy, fresh, soft, and sweet. Its advent not only fills the gap in the domestic market for sugarcane plant water beverages, but also provides consumers with a new choice of healthy drinks, meeting the pursuit of modern people for healthy and natural drinks. As a forward-looking product, the development of sugarcane plant water reflects our company's innovative concept of deep 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 specialized technology and equipment in the existing technology to realize large-scale preparation of sugarcane plant water. At the same time, traditional concentration devices also have certain deficiencies in the use of heat energy. Steam is often directly discharged after use, resulting in waste of heat energy, increasing production cost and low resource utilization rate. On the other hand, after extraction and preparation of sugarcane plant water, it cannot be directly filled into products, but also needs a series of processing technology. There is a lack of specialized technology and equipment in the existing technology to realize large-scale purification treatment of sugarcane plant water.

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

[0006] The purpose of this invention is to address the lack of specialized large-scale preparation and purification processes and equipment for sugarcane plant water in the existing technology, and to provide a high-efficiency sugarcane plant water preparation production line. This production line aims to achieve efficient preparation and deep purification of sugarcane plant water, and also provides a method for preparing sugarcane plant water, improving thermal energy utilization and resource utilization, reducing production costs, meeting the needs of large-scale production, and accelerating the industrialization process of sugarcane plant water.

[0007] To achieve the above objectives, 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. This invention, through the design of a four-effect distillation and concentration device, achieves for the first time large-scale industrial extraction of sugarcane plant water. It employs a unique pipeline connection and condensate collection method, and for the first time continuously produces high-purity sugarcane plant water in industrial production. It also proposes for the first time collecting the steam condensate from the second and third concentration tanks as sugarcane plant water, and for the first time achieves the targeted enrichment of volatile components during sugarcane processing. This is because the steam in the first concentration tank contains a high amount of moisture, and the content of volatile and beneficial components is low, making it unsuitable for development; while the fourth concentration tank has low volatile component content and high sugarcane juice concentration with poor taste, making it unsuitable for collection.

[0010] After sugarcane plant-based water is prepared, a system specifically designed for its characteristics is employed. This system, arranged sequentially along the material flow direction, includes 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 unit. This achieves deep purification of the sugarcane plant-based water. Activated carbon treatment effectively adsorbs organic matter and odors, RO reverse osmosis precisely filters impurities and harmful substances, and the ozone tower and high-temperature sterilization ensure thorough sterilization, guaranteeing the purity and safety of the sugarcane plant-based water and meeting the market requirements for high-quality beverages.

[0011] 2. The steam of the fourth concentration tank enters the first concentration tank for preheating, and almost no hot steam is discharged from the whole device. Based on the closed-loop steam circuit design of the four-effect concentration tank (fourth concentration tank→first concentration tank), the low-temperature waste heat is involved in the preheating of the material, and the problem of energy waste caused by the direct discharge of the last-effect steam in the traditional evaporation system is fundamentally solved. Compared with the one-way steam process, the heat cycle is reused in the present design, so that the overall thermal efficiency of the system is greatly improved. The four-effect distillation concentration device adopts a unique pipeline connection and heat recovery design. The steam is recycled in the system, and no hot steam is directly discharged, so that the heat utilization rate is high, and the energy consumption and production cost are effectively reduced. Self-operated pressure regulating valves are arranged on the steam pipelines between the concentration tanks, so that the pressure gradient is 1.4-1.6→1.3-1.5→0.9-1.2→0.6-0.8 bar, and the heat utilization efficiency is further optimized.

[0012] The three-way valves, pumps, valves and pressure regulating valves arranged on the pipelines can flexibly control the whole production process, and the operation is simple and stable. The parameters can be accurately controlled according to the actual production requirements, so that the efficient preparation and stable production of sugarcane plant water are ensured.

[0013] 3. Innovative reverse cleaning system: The reverse cleaning system designed for the characteristics of sugarcane plant water, combined with acid washing, alkali washing and hot water flushing, effectively removes the pollutants on the surface of the RO membrane, prolongs the service life of the membrane and reduces the equipment maintenance cost. The flow rate of the acid washing liquid is 1.2 m 3 / h, and the circulating pressure is 2.5 MPa, so that the long-term stable operation of the equipment is ensured. A security filter with a filtering accuracy of 5-10 μm is arranged between the activated carbon treatment unit and the RO reverse osmosis treatment unit, so that the sugarcane plant water treated by the activated carbon is further filtered to prevent impurities from entering the RO reverse osmosis treatment unit, and the long-term stable operation of the equipment is further ensured.

[0014] 4. Equipped with a five-way switching valve group and a PLC controller to realize the automation of the cleaning process. By monitoring the parameters such as the water conductivity and the water flow of the RO unit, the acid washing, alkali washing or hot water flushing program is automatically triggered, so that the cleaning efficiency and reliability are improved, the manual error and labor intensity are reduced, and the large-scale production demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of a sugarcane juice concentration and sugarcane plant water co-production integrated device of the present application;

[0016] Figure 2 It is a structure schematic view of a preparation section of the present application;

[0017] Figure 3 It is a structure schematic view of another preferred embodiment device of a collection tank of the preparation section of the present application;

[0018] Figure 4 Structure diagram of the purification section of the present application;

[0019] Figure 5 Structure diagram of the switch valve group of the purification section of the present application;

[0020] In the figure: 1 - first concentration tank; 2 - second concentration tank; 3 - third concentration tank; 4 - fourth concentration tank; 7 - collection tank; 8 - vapor pipeline; 11 - delivery 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 - switch valve group, 51 - first pipeline; 52 - second pipeline; 53 - third pipeline; 54 - fourth pipeline; 55 - fifth pipeline; 56 - sixth pipeline; 57 - seventh pipeline; 58 - eighth pipeline; 61 - first condenser; 62 - second condenser; 71 - filtering device; 91 - liquid pipeline; 92 - feeding pipe; 93 - discharging pipe, 121 - second belt pump pipeline, 131 - third belt pump pipeline, 141 - hot water pipeline, 151 - acid washing pipeline, 161 - alkali washing pipeline, 171 - first connecting pipe, 181 - fourth belt pump pipeline, 191 - fifth belt pump pipeline, 201 - liquid outlet pipe.

DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0022] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component. When a component is referred to as being "disposed" on another component, it can be directly disposed on the other component or there can be an intervening component. 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 commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "including", "comprising", "having" and the like are meant to encompass the items listed thereafter as well as other items.

[0024] Embodiment 1

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

[0026] The preparation section comprises a first concentration tank 1, a second concentration tank 2, a third concentration tank 3 and a fourth concentration tank 4 connected in sequence, each tank is connected in series through a liquid pipeline 91 with a pump, and is connected with a steam pipeline 8 to realize the recycling of heat energy; the upper part of the first concentration tank 1 is connected with the lower part of the second concentration tank 2 through a first pipeline 51; the upper part of the second concentration tank 2 is connected with the inlet of a first condenser 61 through a second pipeline 52, the gas outlet of the first condenser 61 is connected with the lower part of the third concentration tank 3 through a sixth pipeline 56, and the condensate outlet of the first condenser 61 is connected with a collection tank 7 through a fifth pipeline 55; the upper part of the third concentration tank 3 is connected with the inlet of a second condenser 62 through a third pipeline 53, the gas outlet of the second condenser 62 is connected with the lower part of the fourth concentration tank 4 through an eighth pipeline 58, and the condensate outlet of the second condenser 62 is connected with 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 concentration tank 4 is connected with the lower part of the first concentration tank 1 through a fourth pipeline 54;

[0027] 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 connected in sequence along the material flow direction; the inlet of the raw water tank 12 is connected with a conveying pipe 11 connected with the outlet of the collection tank 7, and the conveying pipe 11 is provided with a pump and a valve; the activated carbon treatment unit 13 is connected with the outlet of the raw water tank 12 through a second pipeline 121 with a pump, the water inlet of the RO reverse osmosis treatment unit 17 is connected with the outlet of the activated carbon treatment unit 13 through a third pipeline 131 with a pump, the water outlet thereof is connected with the inlet of the pure water tank 18 through a first connecting pipe 171, the outlet of the pure water tank 18 is connected with the inlet of the ozone tower treatment unit 19 through a fourth pipeline 181 with a pump, the outlet of the ozone tower treatment unit 19 is connected with the inlet of the high-temperature sterilization treatment unit 20 through a fifth pipeline 191 with a pump, and the outlet of the high-temperature sterilization treatment unit 20 is connected with an outlet pipe 201.

[0028] Embodiment 2

[0029] On the basis of embodiment 1, in the further optimized sugarcane plant water efficient production line, a control valve or valve is arranged on each steam pipe 8 connected with the first concentration tank 1, the second concentration tank 2, the third concentration tank 3 and the fourth concentration tank 4. The first concentration tank 1 is provided with a feeding pipe 92, and the fourth concentration tank 4 is provided with a discharging pipe 93. The collecting tank 7 is provided with a discharging port and is connected with the conveying pipe 11. The first pipe 51, the second pipe 52, the third pipe 53 and the fourth pipe 54 are provided with three-way valves. The conveying pipe 11 is provided with a pump and a valve. The liquid pipes 91 between each adjacent tank of the first concentration tank 1, the second concentration tank 2, the third concentration tank 3 and the fourth concentration tank 4 are respectively provided with a pump and a valve. The fifth pipe 55 and the seventh pipe 57 are provided with a filtering device 71 before being connected with the collecting tank 7, and the outlet of the filtering device 71 is connected with the inlet of the collecting tank 7. The first pipe 51, the second pipe 52, the third pipe 53 and the fourth pipe 54 are provided with pressure regulating valves.

[0030] Embodiment 3

[0031] On the basis of embodiment 1 or embodiment 2, in order to realize efficient cleaning of the RO reverse osmosis treatment unit 17, the device further comprises a reverse cleaning system. The water inlet end of the RO reverse osmosis treatment unit 17 is further provided with a concentrated water outlet. The reverse cleaning system comprises a hot water unit 14, an acid washing unit 15 and an alkali washing unit 16. The hot water unit 14 is connected with the water outlet of the RO reverse osmosis treatment unit 17 through a seventh pipe 141. The acid washing unit 15 is connected with the water outlet of the RO reverse osmosis treatment unit 17 through an eighth pipe 151. The alkali washing unit 16 is connected with the water outlet of the RO reverse osmosis treatment unit 17 through a ninth pipe 161. The cleaning water of the reverse cleaning system is discharged through the concentrated water outlet.

[0032] The reverse cleaning system further comprises a switching valve group 21, which is arranged between the water outlet and a first connecting pipe 171 and is further connected with the hot water unit 14, the acid washing unit 15 and the alkali washing unit 16. The switching valve group is a five-way valve.

[0033] In specific implementation, first, the sugarcane juice is input into the first concentration tank 1 through the feeding pipe 92 of the first concentration tank 1, then steam is input into each concentration tank through the steam pipe 8, the liquid pipe 91 with the pump can pump the sugarcane juice in the upper-stage concentration tank into the lower-stage concentration tank, and the steam heats and concentrates the sugarcane juice. After the sugarcane juice in the fourth concentration tank 4 is concentrated, it is conveyed to the next process through the discharging pipe 93.

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

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

[0036] The raw sugarcane plant water flows from the collection tank 7 into the raw water tank 12 through the conveying pipe 11, is temporarily stored, and then flows into the activated carbon treatment unit 13 in sequence. The activated carbon is used to remove organic matter and odors due to its adsorption properties. Then, the water enters the RO reverse osmosis treatment unit 17, which retains and removes most of the dissolved salts, small-molecule organic matter, bacteria, viruses, and other impurities in the water, obtaining high-purity sugarcane plant water. The purified water after RO reverse osmosis treatment flows into the purified water tank 18 for temporary storage and is transported to the ozone tower treatment unit 19 through the fourth pump pipeline 181. The ozone is used to kill residual bacteria, viruses, and other microorganisms due to its strong oxidizing properties, and to decompose organic pollutants, further improving water quality. The sugarcane plant water after ozone treatment enters the high-temperature sterilization treatment unit 20 for heating and sterilization, completely killing residual microorganisms to ensure that the product meets commercial sterile standards, and then can enter the next process such as the 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, the water flows through the water outlet and the first connecting pipe 171 into the subsequent treatment unit. When cleaning is needed, the switching valve group connects the water outlet to one of the hot water unit 14, the acid washing unit 15, and the alkali washing unit 16, respectively, so that the cleaning liquid flows into the RO reverse osmosis treatment unit 17 in the reverse direction to complete the acid washing, alkali washing, or hot water flushing operation, removing the pollutants on the membrane surface, and extending the service life of the membrane.

[0038] Example 4

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

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

[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 acid cleaning solution flow rate is 1.2 m 3 / h, the circulating pressure is 2.5 MPa, and the membrane flux recovery rate after cleaning is ≥95%.

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

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

[0045] When the RO membrane flux decreases to a set value, 2% citric acid solution (45℃) is pumped in reverse for 30 minutes.

[0046] In specific implementation, by controlling the self-acting pressure regulating valve on the steam pipeline 8 between each concentration tank, the pressure gradient is maintained at 1.4-1.6→1.3-1.5→0.9-1.2→0.6-0.8 bar to optimize the efficiency of heat energy utilization. In the reverse cleaning process, the acid cleaning solution flow rate is controlled at 1.2 m 3 / h, and the circulating pressure is 2.5 MPa to ensure 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 material stays in the holding tube for 45±5 seconds to ensure that the furfural retention rate is ≥93% to ensure product quality. The plant water stock solution is sequentially subjected to activated carbon adsorption, RO reverse osmosis (working pressure 2.0 MPa), ozone oxidation (0.8 ppm), and high-temperature instantaneous sterilization (93℃ / 45s) to achieve deep purification. When the RO membrane flux decreases to a 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 1-4, comprising the following steps:

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

[0050] b. Collection of plant water: The steam generated during the concentration process in the second concentration tank 2 and the third concentration tank 3 is condensed by the first condenser 61 and the second condenser 62, respectively, to obtain condensed liquid as sugarcane plant water, which is collected into 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. Purification of plant water: The sugarcane plant water in the collection tank 7 is sequentially subjected to deep purification in 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, to obtain high-quality sugarcane plant water.

[0052] In step a, the first concentration tank 1 is provided with a feed pipe 92 for inputting sugarcane juice, and the fourth concentration tank 4 is provided with a discharge pipe 93 for outputting concentrated sugarcane juice; the flow direction and pressure of the material 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 and pressure of the sugarcane plant water are controlled by the pump and valve arranged on the conveying pipe 11; in the preparation section, the vapor pipeline 8 between the first concentration tank 1, the second concentration tank 2, the third concentration tank 3 and the fourth concentration tank 4 is provided with a self-operated pressure regulating valve, and the pressure gradient is maintained at 1.4-1.6→1.3-1.5→0.9-1.2→0.6-0.8 bar. A more preferred pressure gradient is 1.5→1.2→0.9→0.6 bar, and the steam circulation efficiency is ≥90%.

[0053] In step c, the RO reverse osmosis treatment unit 17 is also subjected to a reverse cleaning step, and the hot water unit 14, the acid washing unit 15 or the alkali washing unit 16 is 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 the reverse direction, 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 PLC controller automatically switches the cleaning mode according to the preset conditions to realize automatic control of acid washing, alkali washing and hot water flushing.

[0054] In step c, the high-temperature sterilization treatment unit 20 comprises a plate heat exchanger and a holding pipe connected in series, the plate heat exchanger heats the material to 90-95℃, the holding pipe has a length of 10-15 meters and a residence time of 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 filtering accuracy of 5-10 μm is arranged between the activated carbon treatment unit 13 and the RO reverse osmosis treatment unit 17, so as to further filter the sugarcane plant water treated by the activated carbon, and prevent impurities from entering the RO reverse osmosis treatment unit 17.

[0056] In a normal operation state, the electromagnetic valve communicates the water outlet with the first connecting pipe, so that the water treated by the RO reverse osmosis flows to the subsequent treatment unit; when cleaning is needed, the PLC controller issues an instruction, and the electromagnetic valve automatically switches to the corresponding cleaning mode, so that the water outlet is communicated with the acid washing unit, the alkali washing unit or the hot water unit respectively, so that the cleaning liquid flows reversely into the RO reverse osmosis treatment unit, and after the cleaning operation is completed, the waste liquid is discharged through the concentrated water outlet.

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

[0058] When the water production conductivity of the RO unit is > 50 μS / cm, the acid washing unit 15 is switched to for acid washing;

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

[0060] After 5 times of acid or alkali washing are completed, the hot water unit 14 is switched to for hot water flushing.

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

[0062] After each batch continuous production is completed, the acid washing unit 15 is switched to for acid washing;

[0063] When the acid washing is completed, the alkali washing unit 16 is switched to for alkali washing;

[0064] When the alkali washing is completed, the hot water unit 14 is switched to for hot water flushing.

[0065] The above description is a detailed description of the preferred embodiments of the present application, but the embodiments are not used to limit the patent application range of the present application, and any equivalent changes or modified changes completed according to the technical spirit of the present application should belong to the patent range covered by the present application.

Claims

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

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

3. The high-efficiency sugarcane plant water preparation production line according to claim 1, characterized in that, The RO reverse osmosis treatment unit (17) is also provided with a concentrate outlet at the inlet end. The RO reverse osmosis treatment unit (17) is provided with a reverse cleaning system, which includes a hot water unit (14), an acid washing unit (15), and an alkaline washing unit (16). The hot water unit (14) is connected to the RO reverse osmosis treatment unit (17) outlet through a hot water pipe (141); the acid washing unit (15) is connected to the RO reverse osmosis treatment unit (17) outlet through an acid washing pipe (151); the alkaline washing unit (16) is connected to the RO reverse osmosis treatment unit (17) outlet through an alkaline washing pipe (161), and the cleaning liquid is discharged from the concentrate outlet.

4. The high-efficiency sugarcane plant water preparation production line according to claim 3, characterized in that, It also includes a switching valve assembly (21), which is located between the water outlet and the first connecting pipe (171) and is also connected to the hot water unit (14), the acid washing unit (15) and the alkaline washing unit (16).

5. A method for preparing sugarcane plant water using the high-efficiency sugarcane plant water preparation production line according to any one of claims 1-4, characterized in that, Includes the following steps: a. Sugarcane juice concentration: Sugarcane juice is sequentially concentrated through the first concentration tank (1), the second concentration tank (2), the third concentration tank (3) and the fourth concentration tank (4) by four-effect distillation. Each concentration tank is connected to a steam pipe (8). The concentrated sugarcane juice is transported through a pumped liquid pipe (91) connected in series between the concentration tanks. b. Collection of plant water: The steam generated during the concentration process in the second concentration tank (2) and the third concentration tank (3) is condensed by the first condenser (61) and the second condenser (62) respectively. The resulting condensate is used as sugarcane plant water and is collected to the collection tank (7) through the fifth pipe (55) and the seventh pipe (57) respectively. It is filtered by the filter device (71) before being connected to the collection tank (7). c. Plant water purification: The sugarcane plant water in the collection tank (7) is passed through the raw water tank (12), activated carbon treatment unit (13), RO reverse osmosis treatment unit (17), pure water tank (18), ozone tower treatment unit (19) and 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 concentration tank (1) is provided with a feed pipe (92) for inputting sugarcane juice, and the fourth concentration tank (4) is provided with a discharge pipe (93) for outputting concentrated sugarcane juice; the material flow direction and pressure in each pipe are controlled by three-way valves and pressure regulating valves set on the first pipe (51), the second pipe (52), the third pipe (53) and the fourth pipe (54); the input flow rate and pressure of sugarcane plant water are controlled by pumps and valves set on the conveying pipe (11); in the preparation section, the steam pipe (8) between the first concentration tank (1), the second concentration tank (2), the third concentration tank (3) and the fourth concentration tank (4) is provided with a self-regulating 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, Step c also includes a step of reverse cleaning the RO reverse osmosis treatment unit (17). The hot water unit (14), acid washing unit (15) or alkaline washing unit (16) are connected to the product water port of the RO reverse osmosis treatment unit (17) by switching valve group (21), so that the cleaning liquid flows back into the RO reverse osmosis treatment unit (17), and the wastewater after cleaning is discharged through the concentrate port. The switching valve group (21) is a five-way valve, and the cleaning mode is automatically switched by the PLC controller according to the preset conditions to realize the automated control of acid washing, alkaline washing and hot water rinsing.

8. The method for preparing sugarcane plant water according to claim 7, characterized in that, The control method for the five-way valve includes: When the conductivity of the RO unit's permeate water is >50μS / cm, switch to the acid washing unit (15) for acid washing; When the permeate flow rate is less than 70% of the initial value, switch to the alkaline washing unit (16) for alkaline washing; After each of the five acid or alkali washes, switch to the hot water unit (14) for hot water rinsing.

9. The method for preparing sugarcane plant water according to claim 5, characterized in that, In step c, the high-temperature sterilization unit (20) includes a plate heat exchanger and a holding tube connected in series. The plate heat exchanger heats the material to 90-95°C, and the holding tube is 10-15 meters long with a residence time of 30-60 seconds, thus performing high-temperature instantaneous sterilization 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 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 activated carbon treatment and prevent impurities from entering the RO reverse osmosis treatment unit (17).

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