A purified water preparation system for sorbitol production

Abstract

The utility model discloses a kind of purification water preparation systems for sorbitol production, including raw water storage tank, wherein, the rear of the raw water storage tank is sequentially connected with raw water pump, plate heat exchanger, mechanical filter, activated carbon filter, ion exchanger, precision filter, first high-pressure pump, first reverse osmosis device, intermediate water tank, second high-pressure pump, second reverse osmosis device and purified water tank by water pipe;PH adjusting device is provided between the intermediate water tank and second high-pressure pump;Breather is provided at the top of the purified water tank, and heating jacket is sleeved on the breather.The utility model can prepare the purified water that meets the use in sorbitol production process.

Description

Technical Field

[0001] This utility model relates to the field of purified water preparation technology, specifically to a purified water preparation system for sorbitol production. Background Technology

[0002] Sorbitol is a white crystalline powder, flakes, or granules, odorless. During the sorbitol crystallization process, equipment in the cleanroom needs to be cleaned and rinsed with purified water to ensure product quality and extend equipment lifespan. Ordinary piped water contains various impurities and does not meet the requirements for purified water; it must undergo specific treatment to meet the needs of sorbitol production.

[0003] However, existing purified water preparation systems have some shortcomings. For example, they are not thorough enough in removing impurities, odors and bacteria from tap water, making it difficult to consistently meet purified water standards. Furthermore, they lack effective purified water storage and recycling devices, which cannot guarantee that purified water indicators will not degrade during long-term storage, resulting in resource waste and other problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a purified water preparation system for sorbitol production, which can prepare purified water that meets the requirements of the sorbitol production process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A purified water preparation system for sorbitol production includes a raw water storage tank. The raw water storage tank is connected in sequence via water pipes to a raw water pump, a plate heat exchanger, a mechanical filter, an activated carbon filter, an ion exchanger, a precision filter, a primary high-pressure pump, a primary reverse osmosis unit, an intermediate water tank, a secondary high-pressure pump, a secondary reverse osmosis unit, and a purified water tank. A pH adjustment device is installed between the intermediate water tank and the secondary high-pressure pump. A breather is installed on the top of the purified water tank, and a heating jacket is fitted over the breather.

[0007] Preferably, the ion exchanger is connected to a brine tank, and a brine pump is provided between the brine tank and the ion exchanger to pump brine from the brine tank into the ion exchanger to restore the adsorption capacity of the ion exchange resin in the ion exchanger.

[0008] Preferably, the plate heat exchanger, activated carbon filter, and secondary reverse osmosis unit are also connected to the raw water storage tank.

[0009] Preferably, a pure water pump, a tube sheet heat exchanger, and a workshop water point are sequentially connected to the rear of the purified water tank via water pipes.

[0010] Preferably, the workshop water point is also connected to the purified water tank via a return water pipe; the return water pipe is connected to a discharge pipe via a connecting tee, and the return water pipe is equipped with a conductivity meter located between the tee and the workshop water point, and a return water valve located between the tee and the purified water tank, and the discharge pipe is equipped with a discharge valve.

[0011] Preferably, the system further includes a PLC controller, the input terminal of which is connected to the output terminal of the conductivity side-view instrument, and the output terminal of the PLC controller is connected to the controlled terminals of the return water valve and the discharge valve, respectively.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This invention, through the sequential arrangement of a mechanical filter, an activated carbon filter, an ion exchanger, a precision filter, a first-stage reverse osmosis device, a pH adjustment device, and a second-stage reverse osmosis device, can effectively remove impurities, odors, bacteria, etc. from tap water, ensuring that the purified water produced meets relevant standards and satisfies the quality requirements for purified water in the sorbitol production process, effectively guaranteeing product quality and equipment lifespan.

[0014] This invention, through the inclusion of a breather and a heating jacket, ensures that the water quality inside the purified water tank is not contaminated by external factors.

[0015] This invention increases the system's flexibility and improves the reliability and practicality of the entire purified water preparation system by connecting the plate heat exchanger, activated carbon filter, and secondary reverse osmosis device to the raw water storage tank.

[0016] This invention achieves long-term preservation of purified water and ensures that the indicators do not degrade and can be recycled by setting up a return water pipe and a discharge pipe between the purified water tank and the water point in the workshop, as well as a discharge and return water mechanism controlled by a conductivity meter and controller on the return water pipe, thereby reducing water waste and lowering production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] The components include: 1. Raw water storage tank, 2. Raw water pump, 3. Plate heat exchanger, 4. Mechanical filter, 5. Activated carbon filter, 6. Ion exchanger, 7. Precision filter, 8. Primary high-pressure pump, 9. Primary reverse osmosis unit, 10. Intermediate water tank, 11. Secondary high-pressure pump, 12. Secondary reverse osmosis unit, 13. Purified water tank, 14. Brine pump, 15. Brine tank, 16. pH adjustment device, 17. Pure water pump, 18. Tube sheet heat exchanger, 19. Workshop water supply point, 20. Return water pipe, 21. Drain pipe, 22. Breather, 23. Heating jacket, 24. Drain valve, and 25. Return water valve. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] A purified water preparation system for sorbitol production, combined with Figure 1 As shown, the system includes a raw water storage tank 1, and a raw water pump 2, a plate heat exchanger 3, a mechanical filter 4, an activated carbon filter 5, an ion exchanger 6, a precision filter 7, a first-stage high-pressure pump 8, a first-stage reverse osmosis unit 9, an intermediate water tank 10, a second-stage high-pressure pump 11, a second-stage reverse osmosis unit 12, and a purified water tank 13 are connected in sequence via water pipes to the rear of the raw water storage tank 1.

[0021] Raw water storage tank 1 is connected to the municipal tap water supply and is used to store raw water, providing the initial water source for the entire purified water preparation process. Raw water pump 2 draws raw water from raw water storage tank 1, which is then heated by plate heat exchanger 3 before entering mechanical filter 4. Plate heat exchanger 3 is connected to industrial steam, which exchanges heat with the raw water. Mechanical filter 4 removes large particulate impurities such as silt and rust from the water. The water filtered by mechanical filter 4 then enters activated carbon filter 5, which adsorbs odors, residual chlorine, and some organic matter. After treatment by activated carbon filter 5, the water enters ion exchanger 6, which removes cations and anions from the water, further improving water purity. Water flowing out of ion exchanger 6 enters precision filter 7, which further intercepts tiny particulate impurities. Then, it is pressurized by first-stage high-pressure pump 8 and enters first-stage reverse osmosis unit 9. Preliminary reverse osmosis treatment is carried out in first-stage reverse osmosis unit 9, and intermediate water is obtained and enters intermediate water tank 10. The intermediate water is then pressurized by second-stage high-pressure pump 11 and enters second-stage reverse osmosis unit 12 for deep reverse osmosis treatment. Finally, purified water that meets the quality requirements is stored in purified water tank 13.

[0022] Ion exchanger 6 is connected to brine tank 15, which stores brine. A brine pump 14 is installed between brine tank 15 and ion exchanger 6. The brine pump 14 is used to pump the brine from brine tank 15 into ion exchanger 6 to backwash the ion exchange resin in ion exchanger 6, thereby restoring the adsorption capacity of the ion exchange resin in ion exchanger 6 and ensuring the continuous and efficient operation of ion exchanger 6.

[0023] A pH adjustment device is installed between the intermediate water tank 10 and the secondary high-pressure pump 11. The pH adjustment device can adjust the pH value of the intermediate water to achieve a suitable acidity or alkalinity, so as to meet the requirements of subsequent purified water preparation and use.

[0024] The plate heat exchanger 3, activated carbon filter 5, and secondary reverse osmosis unit 12 are also connected to the raw water storage tank 1.

[0025] After steam exchanges heat with raw water in plate heat exchanger 3, condensate is produced. This condensate is essentially distilled water heated by steam, with good water quality. It is returned to raw water storage tank 1 and can directly participate in the purified water preparation process as part of the raw water, reducing the demand for fresh raw water and thus saving water resources. At the same time, although the temperature of the condensate decreases during the return process, it still carries some heat. When it returns to raw water storage tank 1, it can raise the temperature of the raw water in tank 1 to a certain extent. This reduces the amount of steam used in the subsequent heat exchange process in plate heat exchanger 3, as the raw water already has a certain initial temperature, thus further extending heat recovery and utilization and reducing energy consumption.

[0026] When activated carbon filter 5 malfunctions (e.g., internal structural damage causing some unfiltered water to leak out), the quality of the effluent may suddenly deteriorate. In this case, connecting the outlet of activated carbon filter 5 to raw water storage tank 1 allows this abnormal water to flow back to tank 1, preventing it from directly entering subsequent treatment stages and contaminating the entire system. This buys maintenance personnel time to inspect and repair activated carbon filter 5, while also avoiding damage to subsequent expensive treatment equipment (such as ion exchangers).

[0027] During operation, the secondary reverse osmosis unit 12 produces concentrate. Although this concentrate does not meet the standards for purified water, it still contains a certain amount of water. Returning it to the raw water storage tank 1 allows for the reuse of water resources. Furthermore, by remixing the concentrate into the raw water, the system's demand for fresh water can be reduced, lowering production costs while also meeting environmental protection requirements.

[0028] A breather 22 is installed on the top of the purified water tank 13. The breather 22 ensures the pressure balance inside and outside the purified water tank 13, preventing excessively high or low pressure inside the purified water tank 13 from affecting the quality of the purified water. A heating jacket 23 is fitted on the breather 22. The heating jacket 23 prevents condensation on the surface of the breather 22 from breeding microorganisms, thereby preventing external water vapor from entering the purified water tank 13 and contaminating the purified water, and ensuring that the air entering the purified water tank 13 is clean.

[0029] The purified water tank 13 is connected in sequence to a purified water pump 17, a tube sheet heat exchanger 18, and a workshop water point 19 via water pipes. The purified water pump 17 draws purified water from the purified water tank 13, and after the temperature is regulated by the tube sheet heat exchanger 18, it is delivered to the workshop water point 19, thereby meeting the requirements for purified water in the sorbitol production process. At the same time, the tube sheet heat exchanger 18 is connected to industrial steam, and heat is exchanged between the industrial steam and the purified water.

[0030] The workshop water point 19 is also connected to the purified water tank 13 via a return water pipe 20, and a discharge pipe 21 is connected to the return water pipe 20 via a connecting tee. A conductivity meter and a return water valve 25 are installed on the return water pipe 20. The conductivity meter is located between the tee and the workshop water point 19, and the return water valve 25 is located between the tee and the purified water tank 13. Simultaneously, a discharge valve 24 is installed on the discharge pipe 21. The system also includes a PLC controller. The input terminal of the PLC controller is connected to the output terminal of the conductivity meter, and the output terminal of the PLC controller is connected to the controlled terminals of the return water valve 25 and the discharge valve 24, respectively. When some of the water used at the workshop water point 19 is returned to the purified water tank 13, the conductivity of the returned water is detected by a conductivity meter installed on the return water pipe 20 to determine whether the water quality meets the purified water standard. If the conductivity is within the specified range, the controller controls the return water valve 25 to open, allowing the water to flow back to the purified water tank 13 through the return water pipe 20, thus realizing the recycling of purified water. If the conductivity exceeds the range, the controller controls the discharge valve 24 to open, discharging the unqualified water through the discharge pipe 21, ensuring that the water quality in the purified water tank 13 always meets the requirements.

[0031] The working principle of this utility model is as follows:

[0032] I. Raw Water Pretreatment Stage

[0033] Water intake and storage: Raw water from the municipal tap water supply enters the raw water storage tank 1 for storage, serving as the initial water source for the entire purified water preparation process.

[0034] Heating: Raw water pump 2 draws raw water from raw water storage tank 1, and the raw water enters plate heat exchanger 3 through water pipes. Plate heat exchanger 3 is connected to industrial steam, and uses industrial steam to exchange heat with raw water to raise the temperature of the raw water to meet the temperature requirements of subsequent treatment processes.

[0035] Removal of large particles: The heated raw water enters the mechanical filter 4. The mechanical filter 4, with its filter media, can effectively remove large particles such as mud, sand and rust from the water.

[0036] Adsorption of harmful substances: Water filtered by mechanical filter 4 enters activated carbon filter 5. Activated carbon filter 5 relies on the adsorption properties of activated carbon to remove odors, residual chlorine and some organic matter from the water, further improving water quality.

[0037] Ion exchange: Water flowing from the activated carbon filter 5 enters the ion exchanger 6. The ion exchange resin in the ion exchanger 6 reacts with the cations and anions in the water, removing these ions and thus greatly improving the purity of the water. The brine tank 15 stores brine, which is pumped into the ion exchanger 6 by the brine pump 14. The ion exchange resin is periodically backwashed to restore its adsorption capacity and ensure continuous and efficient operation.

[0038] II. Fine Filtration and Reverse Osmosis Stage

[0039] Microparticle interception: After being treated by ion exchanger 6, the water enters precision filter 7, where it is further intercepted to remove microparticle impurities, thus further improving the water quality.

[0040] First-stage reverse osmosis: Water flowing out of the precision filter 7 is pressurized by the first-stage high-pressure pump 8 and then enters the first-stage reverse osmosis unit 9. In the first-stage reverse osmosis unit 9, the principle of a semi-permeable membrane is used to force water molecules through the membrane under pressure, while most impurities are retained, producing intermediate water that is discharged into the intermediate water tank 10.

[0041] pH Adjustment: After the intermediate water flows out of the intermediate water tank 10, it passes through a pH adjustment device before entering the secondary high-pressure pump 11. This device can adjust the pH value of the intermediate water to a suitable acidity or alkalinity for subsequent purified water preparation and use.

[0042] Secondary reverse osmosis: The intermediate water, after pH adjustment, is pressurized by the secondary high-pressure pump 11 and enters the secondary reverse osmosis unit 12, where it undergoes further deep treatment through the reverse osmosis process to remove impurities and greatly improve the purity of the purified water.

[0043] III. Concentrate Recovery and Purified Water Storage Stage

[0044] Concentrate recovery: Although the concentrate generated during the operation of the secondary reverse osmosis unit 12 does not meet the standards for purified water, it still contains a certain amount of water. This concentrate is returned to the raw water storage tank 1, realizing the reuse of water resources, reducing the system's demand for fresh water, lowering costs, and meeting environmental protection requirements.

[0045] Purified water storage: Purified water that has passed through the secondary reverse osmosis unit 12 and meets the standards is stored in the purified water tank 13. To ensure the pressure balance inside and outside the purified water tank 13 and prevent excessively high or low internal pressure from affecting the quality of the purified water, a breather 22 is installed on the top of the tank. The breather 22 is equipped with a heating jacket 23, which can prevent condensation on the surface from breeding microorganisms, avoid external water vapor contamination of the purified water, and ensure that the air entering the tank is clean.

[0046] IV. Purified Water Delivery and Reuse Stage

[0047] Delivery and Temperature Control: The purified water in the purified water tank 13 is drawn out by the pure water pump 17, and after being regulated by the tube sheet heat exchanger 18, it is delivered to the workshop water point 19 to meet the requirements for purified water in the sorbitol production process. The tube sheet heat exchanger 18 is also connected to industrial steam, and temperature regulation is achieved through heat exchange between the steam and the purified water.

[0048] Water reuse control: Part of the water flowing from the workshop water point 19 is returned to the purified water tank 13 through the return water pipe 20. A conductivity meter is installed on the return water pipe 20 to test the conductivity of the returned water. The return water pipe 20 also has a T-junction connecting to the discharge pipe 21. The conductivity data is transmitted to the PLC controller. When the conductivity is within the specified range, the PLC controller controls the return water valve 25 to open, allowing water to flow back to the purified water tank 13 through the return water pipe 20, thus achieving the recycling of purified water. When the conductivity exceeds the range, the PLC controller controls the discharge valve 24 to open, discharging the substandard water through the discharge pipe 21, thereby ensuring that the water quality in the purified water tank 13 always meets production requirements.

Claims

1. A purified water preparation system for sorbitol production, comprising a raw water storage tank (1), characterized in that: The raw water storage tank (1) is connected in sequence to the following components via water pipes: raw water pump (2), plate heat exchanger (3), mechanical filter (4), activated carbon filter (5), ion exchanger (6), precision filter (7), primary high-pressure pump (8), primary reverse osmosis device (9), intermediate water tank (10), secondary high-pressure pump (11), secondary reverse osmosis device (12), and purified water tank (13); a pH adjustment device is provided between the intermediate water tank (10) and the secondary high-pressure pump (11); a breather (22) is provided on the top of the purified water tank (13), and a heating jacket (23) is fitted on the breather (22).

2. The purified water preparation system for sorbitol production according to claim 1, characterized in that: The ion exchanger (6) is connected to a brine tank (15), and a brine pump (14) is provided between the brine tank (15) and the ion exchanger (6) to pump the brine in the brine tank (15) into the ion exchanger (6) to restore the adsorption capacity of the ion exchange resin in the ion exchanger (6).

3. The purified water preparation system for sorbitol production according to claim 1, characterized in that: The plate heat exchanger (3), activated carbon filter (5) and secondary reverse osmosis unit (12) are also connected to the raw water storage tank (1).

4. The purified water preparation system for sorbitol production according to claim 1, characterized in that: The purified water tank (13) is connected in sequence to a pure water pump (17), a tube sheet heat exchanger (18), and a workshop water point (19) via water pipes.

5. A purified water preparation system for sorbitol production according to claim 4, characterized in that: The workshop water point (19) is also connected to the purified water tank (13) via a return water pipe (20); the return water pipe (20) is connected to a discharge pipe (21) via a connecting tee, and the return water pipe (20) is equipped with a conductivity side-view instrument located between the tee and the workshop water point (19) and a return water valve (25) located between the tee and the purified water tank (13), and the discharge pipe (21) is equipped with a discharge valve (24).

6. A purified water preparation system for sorbitol production according to claim 5, characterized in that: The system also includes a PLC controller, the input of which is connected to the output of the conductivity side-view instrument, and the output of which is connected to the controlled ends of the return water valve (25) and the discharge valve (24), respectively.

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