A two-stage distillation apparatus

Abstract

The utility model relates to distillation water preparation technical field, concretely is a kind of two-stage distillation equipment.The two-stage distillation equipment includes primary distillation unit and secondary distillation unit;Primary distillation unit includes primary distillator, primary condenser pipe and primary distilled water collection barrel, and the water outlet of primary condenser pipe is communicated with condensate water collection barrel;Condensate water collection barrel is also provided with circulating pump in it, and circulating pump is used to transport the condensate water in condensate water collection barrel to primary condenser pipe or secondary distillation unit;Primary distillator is communicated with tap water outlet by first branch pipe, and flow detector is arranged at the water inlet of first branch pipe and primary condenser pipe, and flow detector, primary distillation unit and secondary distillation unit are electrically connected with controller respectively, and flow detector is used to detect the tap water flow of first branch pipe and primary condenser pipe water inlet, and controller is used to control primary distillation unit to stop running when the tap water flow of first branch pipe or primary condenser pipe water inlet is less than preset threshold value.

Description

Technical Field

[0001] This utility model relates to the field of distilled water preparation technology, specifically a two-stage distillation device. Background Technology

[0002] Laboratory water is a fundamental resource for scientific research, chemical analysis, medical testing, and bioprocessing, and its quality significantly impacts the accuracy and reproducibility of experimental results. Currently, most laboratory water sources are municipal tap water. Although treated tap water meets drinking water standards, it still contains impurities such as soluble inorganic salts, organic matter, microorganisms, particulate matter, and free chlorine, which falls far short of the stringent water quality requirements of laboratories. Further purification is necessary to obtain laboratory water of varying purity levels.

[0003] Distillation is a traditional and classic method for preparing pure water in the laboratory, especially suitable for producing double-distilled water (the product of redistillation of first-distilled water) from tap water sources. The distillation process relies on heating to evaporate water, followed by cooling and collection in a condenser to obtain pure water. This effectively removes soluble inorganic salts, some organic matter, microorganisms, and suspended particulate matter from the water, playing a crucial role in the preparation of high-purity water. However, commonly used distillation equipment has the following drawbacks: 1. High Demand for Manual Supervision: Most electric distillers used in laboratories have simple structures and lack automated control functions. During operation, insufficient or interrupted water supply can easily lead to dry burning of the heating element, causing damage to the equipment or even a safety accident. Therefore, operators must monitor the equipment at all times, increasing the manpower burden and operational risks.

[0004] 2. Serious waste of energy and water resources: Since the distillation process requires a continuous supply of cooling water to condense water vapor, conventional units usually use a direct-flow cooling system with tap water. After one use, the cooling water is directly discharged into the sewer, resulting in a large waste of water resources, which is especially obvious during continuous operation.

[0005] 3. Low output efficiency and cumbersome segmented operation: Traditional units are mostly single distillation structures, which cannot produce primary and secondary water at the same time. Users need to wait for the primary distillation to be completed before manually transferring the water source and performing secondary distillation. The operation process is complicated, time-consuming and inefficient, which is difficult to meet the actual needs, especially in experimental scenarios with large experimental volume or requiring multi-stage pure water.

[0006] To address the shortcomings of the existing technologies, there is an urgent need to develop a laboratory pure water preparation unit that can simultaneously produce primary and secondary distilled water, has automated control capabilities, and can recycle cooling water. Utility Model Content

[0007] The purpose of this invention is to propose a two-stage distillation device, which aims to solve the technical problems of existing distillation equipment, such as high demand for manual operation, serious waste of energy and water resources, low output efficiency, and cumbersome segmented operation.

[0008] To achieve the above objectives, this utility model proposes a two-stage distillation apparatus, comprising a primary distillation unit and a secondary distillation unit; The primary distillation unit includes a primary distiller, a primary condenser, and a primary distilled water collection tank. The primary distiller contains the primary condenser, and the outlet of the primary distiller is connected to two primary distilled water collection tanks. One of the primary distilled water collection tanks is connected to the secondary distillation unit, and the outlet of the primary condenser is connected to the condensed water collection tank. The condensate collection tank is also equipped with a circulation pump, which is used to transport the condensate in the condensate collection tank to the primary condenser or the secondary distillation unit. The primary distillation unit is connected to the tap water outlet via a first branch pipe. Flow meters are installed at both the first branch pipe and the inlet of the primary condenser. The flow meters, the primary distillation unit, and the secondary distillation unit are electrically connected to a controller. The flow meters are used to detect the tap water flow rate at the first branch pipe and the inlet of the primary condenser. The controller is used to stop the primary distillation unit from operating when the tap water flow rate at the first branch pipe or the inlet of the primary condenser is less than a preset threshold.

[0009] Preferably, the system further includes a solar power supply unit, which is electrically connected to the primary distillation unit, the secondary distillation unit, and the controller.

[0010] Preferably, the primary distillation apparatus is provided with two primary condenser tubes spaced apart.

[0011] Preferably, the secondary distillation unit includes a secondary distillation apparatus, a secondary condenser, and a secondary distilled water collection tank. The inlet of the secondary distillation apparatus is connected to one of the primary distilled water collection tanks. The secondary condenser is installed inside the secondary distillation apparatus. The outlet of the secondary distillation apparatus is connected to the secondary distilled water collection tank. The outlet of the secondary condenser is connected to the condensate collection tank. The circulation pump is also used to transport the condensate in the condensate collection tank to the secondary condenser. The flow meter is installed at the inlet of the secondary condenser tube, and the controller is used to control the secondary distillation unit to stop operating when the tap water flow rate at the inlet of the secondary condenser tube is less than a preset threshold.

[0012] Preferably, a water seal vent hole is provided on the primary condenser or the secondary condenser.

[0013] Preferably, a filter screen is also provided at the tap water outlet.

[0014] Preferably, both the primary condenser and the secondary condenser are spiral-shaped.

[0015] Preferably, the diameter of the primary condenser or the secondary condenser gradually decreases from top to bottom.

[0016] Preferably, the solar power supply unit includes a solar panel and a battery, wherein the solar panel is used to convert solar energy into electrical energy, and the battery is connected to the solar panel to store electrical energy.

[0017] Preferably, the condensate collection tank is further equipped with a TDS meter for detecting the TDS value of the condensate; the condensate collection tank is also equipped with a temperature sensor for detecting the temperature of the condensate.

[0018] The dual-stage distillation equipment disclosed in this utility model has the following beneficial effects: It simultaneously produces primary and secondary distilled water through a primary distillation unit and a secondary distillation unit, meeting the differentiated water purity requirements of various experimental projects. The condensate from the primary / secondary distillation units is collected in a condensate collection tank equipped with a circulation pump to return the condensate to the condenser tubes of the primary / secondary distillation units, achieving a closed-loop circulation, improving water resource utilization, and reducing resource waste. Furthermore, flow meters are installed on the first branch pipe at the tap water outlet and at the inlet of the primary condenser tube. These flow meters are electrically connected to a controller; when the flow rate is detected to be too low, the controller automatically cuts off the heating power to the primary and secondary distillation units to prevent equipment damage due to dry burning, improving system safety and significantly reducing the burden on operators. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the two-stage distillation equipment of this utility model; Figure 2 This is a connection block diagram of some structures in the two-stage distillation equipment of this utility model.

[0021] In the attached diagram: 1-Primary distillation unit, 11-Primary distiller, 12-Primary condenser, 121-Water seal vent, 13-Primary distilled water collection tank, 14-First branch pipe, 2-Secondary distillation unit, 21-Secondary distiller, 22-Secondary condenser, 23-Secondary distilled water collection tank, 3-Condensate collection tank, 31-Circulation pump, 4-Tap water outlet, 5-Flow meter, 6-Controller, 7-Solar power supply unit.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] like Figures 1 to 2 As shown, a two-stage distillation apparatus includes a primary distillation unit 1 and a secondary distillation unit 2; The primary distillation unit 1 includes a primary distiller 11, a primary condenser 12, and a primary distilled water collection tank 13. The primary distiller 11 is equipped with the primary condenser 12. The outlet of the primary distiller 11 is connected to two primary distilled water collection tanks 13 respectively. One of the primary distilled water collection tanks 13 is connected to the secondary distillation unit 2. The outlet of the primary condenser 12 is connected to the condensed water collection tank 3. The condensate collection tank 3 is also equipped with a circulation pump 31, which is used to transport the condensate in the condensate collection tank 3 to the primary condenser 12 or the secondary distillation unit 2. The primary distillation unit 11 is connected to the tap water outlet 4 via a first branch pipe 14. Flow meters 5 are installed at the inlet of the first branch pipe 14 and the inlet of the primary condenser 12. The flow meters 5, the primary distillation unit 1, and the secondary distillation unit 2 are electrically connected to the controller 6. The flow meters 5 are used to detect the tap water flow rate at the inlet of the first branch pipe 14 and the primary condenser 12. The controller 6 is used to control the primary distillation unit 1 to stop operating when the tap water flow rate at the inlet of the first branch pipe 14 or the primary condenser 12 is less than a preset threshold.

[0027] Specifically, this solution provides a two-stage distillation device, particularly suitable for various laboratories with low daily distilled water usage but high water quality requirements. This two-stage distillation device primarily processes ordinary tap water through a step-by-step distillation process, simultaneously producing primary and secondary distilled water through a primary distillation unit 1 and a secondary distillation unit 2, meeting the varying purity requirements of different experimental projects. The condensate from the primary distillation unit 1 / secondary distillation unit 2 is collected in a condensate collection tank 3 for subsequent recycling. The condensate tank is typically designed with sufficient capacity, for example, 10-30L in actual use. Multiple condensate collection tanks 3 can also be used together, such as five 10L tanks and ten 30L tanks, to handle a large volume of condensate in a short time, preventing excessive heat buildup that could affect condensation efficiency. The condensate collection tank 3 is equipped with a circulation pump 31 to return the condensate to the condenser tubes of the primary distillation unit 1 / secondary distillation unit 2, achieving a closed-loop circulation, improving water resource utilization, and reducing resource waste. In addition, flow meters 5 are installed at the first branch pipe 14 of the tap water outlet 4 and the inlet of the primary condenser pipe 12. The flow meters 5 are electrically connected to the controller 6. For example, when the flow meter 5 detects a flow rate of <0.1L / min, the controller 6 cuts off the heating power to the primary distillation unit 1 and the secondary distillation unit 2. The above settings can automatically cut off the power when the equipment is short of water or the water supply is interrupted, preventing equipment damage due to dry burning, improving the safety of the system, and greatly reducing the burden on the operators.

[0028] In summary, this two-stage distillation equipment can simultaneously produce primary and secondary distilled water, and also features automatic power-off protection against dry burning and closed-loop circulation of condensate. This not only improves operational safety and convenience but also achieves efficient utilization of water and electricity resources, thereby better serving the diverse needs of modern laboratories for high-quality water sources.

[0029] Furthermore, it also includes a solar power supply unit 7, which is electrically connected to the primary distillation unit 1, the secondary distillation unit 2, and the controller 6.

[0030] The system is also equipped with an external solar power supply unit 7, which provides power to electronic devices such as the primary distillation unit 1, the secondary distillation unit 2, and the circulation pump 31. By driving the equipment with clean energy, energy efficiency and environmental protection are improved.

[0031] Furthermore, the primary distiller 11 is equipped with two primary condenser tubes 12 spaced apart. Using two primary condenser tubes 12 improves distillation efficiency. Corresponding to each of the two primary condenser tubes 12, the primary distiller 11 has two outlets. The condensate from one outlet is stored in one of the primary distillation water collection tanks 13, which can be used directly. The primary distillate water in the other primary distillation water collection tank 13 is then fed into the secondary distillation unit 2 for secondary distillation to obtain secondary distilled water. The overall structure is simple, and both primary and secondary distilled water can be produced using this equipment.

[0032] Furthermore, the secondary distillation unit 2 includes a secondary distiller 21, a secondary condenser 22, and a secondary distilled water collection tank 23. The inlet of the secondary distiller 21 is connected to one of the primary distilled water collection tanks 13. The secondary distiller 21 is equipped with the secondary condenser 22. The outlet of the secondary distiller 21 is connected to the secondary distilled water collection tank 23. The outlet of the secondary condenser 22 is connected to the condensate collection tank 3. The circulating pump 31 is also used to transport the condensate in the condensate collection tank 3 to the secondary condenser 22. The flow meter 5 is installed at the inlet of the secondary condenser tube 22. The controller 6 is used to control the secondary distillation unit 2 to stop operating when the tap water flow rate at the inlet of the secondary condenser tube 22 is less than a preset threshold.

[0033] The secondary distillation unit 2 evaporates and condenses the primary distilled water again to obtain secondary distilled water, which is collected in the secondary distilled water collection tank 23. Due to the secondary distillation, its purity is higher than that of the primary distilled water, removing inorganic salts, organic matter, microorganisms, and volatile impurities, making it suitable for applications requiring high purity, such as water for injection. Similarly, the condensate in the secondary condenser 22 also comes from the condensate collection tank 3 and is circulated by the circulation pump 31 to avoid water waste. The inlet of the secondary condenser 22 is also equipped with the aforementioned flow meter 5. When the tap water flow rate at the inlet of the secondary condenser 22 is less than a preset threshold, the controller 6 stops the secondary distillation unit 2 from operating to prevent damage to the equipment due to dry burning.

[0034] Furthermore, a water seal vent hole 121 is provided on the primary condenser tube 12 or the secondary condenser tube 22. The water seal vent hole 121 can also be provided on the primary condenser tube 12 or the secondary condenser tube 22. This hole is connected to the atmosphere and is intended to regulate the pressure balance inside the condenser tube, prevent the discharge of condensate due to negative pressure or air resistance, and ensure that the condensate / water can flow out smoothly.

[0035] Furthermore, a filter screen is also installed at the tap water outlet 4. The filter screen, with a filtration size of 0.4~1mm, is installed at the tap water outlet 4 to effectively intercept large particulate impurities in the tap water, preventing them from entering the double-stage distillation equipment and avoiding damage to the equipment due to particle impact during the distillation process.

[0036] Furthermore, both the primary condenser 12 and the secondary condenser 22 are spiral-shaped. The spiral design significantly increases the cooling area, effectively enhancing heat exchange efficiency, accelerating the steam condensation process, and efficiently cooling the steam into liquid water.

[0037] Furthermore, from top to bottom, the diameter of the primary condenser 12 or the secondary condenser 22 gradually decreases. In this embodiment, both the primary condenser 12 and the secondary condenser 22 are variable-diameter spirals, with a large inlet diameter and a small outlet diameter. They can also be used in conjunction with an external fan for cooling, increasing the condensation rate, and preventing steam residue at the outlet.

[0038] Specifically, the primary condenser 12 or the secondary condenser 22 can adopt a three-stage stepped diameter reduction structure: from top to bottom, it is divided into an inlet section, a transition section and an outlet section. The diameter of the inlet section is Φ12mm and the spiral spacing is 25mm, which can accelerate the steam flow; the diameter of the transition section is Φ8mm and the spiral spacing is 20mm, which enhances the heat exchange effect; the diameter of the outlet section is Φ5mm and the spiral spacing is 10mm, which improves the condensation effect.

[0039] Furthermore, the solar power supply unit 7 includes a solar panel and a battery. The solar panel converts solar energy into electrical energy, and the battery is connected to the solar panel (solar photovoltaic panel) to store electrical energy. The solar power supply unit 7 converts solar energy into electrical energy through the solar panel and stores it in the battery, which is used to continuously power the electronic components in the two-stage distillation equipment.

[0040] Furthermore, the condensate collection tank 3 is also equipped with a TDS detector for detecting the TDS value of the condensate; the condensate collection tank 3 is also equipped with a temperature sensor for detecting the temperature of the condensate.

[0041] In this embodiment, a TDS meter can also be installed inside the condensate collection tank 3 to detect TDS levels. When the impurities in the recycled condensate exceed the standard, the controller 6 opens the solenoid valve of the condensate collection tank 3 (for example, automatically opening when TDS > 50 ppm) and controls the alarm to sound, draining the condensate from the condensate collection tank 3 and replacing it to prevent impurities from accumulating and affecting the condensation efficiency of the condenser tube. Furthermore, a temperature sensor can be installed inside the condensate collection tank 3 to prevent the condensate temperature from becoming too high. For example, when the temperature sensor detects that the condensate temperature > 50°C, the controller 6 controls the alarm to sound, reminding the user that the condensate temperature is abnormally high and prompting them to change the water or cool it down.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A two-stage distillation apparatus, characterized in that, It includes a primary distillation unit (1) and a secondary distillation unit (2); The primary distillation unit (1) includes a primary distiller (11), a primary condenser (12), and a primary distilled water collection tank (13). The primary distiller (11) is equipped with the primary condenser (12). The outlet of the primary distiller (11) is connected to two primary distilled water collection tanks (13), one of which is connected to the secondary distillation unit (2). The outlet of the primary condenser (12) is connected to the condensed water collection tank (3). The condensate collection tank (3) is also equipped with a circulation pump (31), which is used to transport the condensate in the condensate collection tank (3) to the primary condenser (12) or the secondary distillation unit (2). The primary distillation unit (11) is connected to the tap water outlet (4) through the first branch pipe (14). A flow meter (5) is provided at the inlet of the first branch pipe (14) and the inlet of the primary condenser (12). The flow meter (5), the primary distillation unit (1) and the secondary distillation unit (2) are electrically connected to the controller (6). The flow meter (5) is used to detect the tap water flow at the inlet of the first branch pipe (14) and the primary condenser (12). The controller (6) is used to control the primary distillation unit (1) to stop operating when the tap water flow at the inlet of the first branch pipe (14) or the primary condenser (12) is less than a preset threshold.

2. The two-stage distillation apparatus according to claim 1, characterized in that, It also includes a solar power supply unit (7), which is electrically connected to the primary distillation unit (1), the secondary distillation unit (2) and the controller (6).

3. The two-stage distillation apparatus according to claim 1, characterized in that, The primary distiller (11) is provided with two primary condenser tubes (12) spaced apart.

4. The two-stage distillation apparatus according to claim 3, characterized in that, The secondary distillation unit (2) includes a secondary distillation apparatus (21), a secondary condenser (22), and a secondary distilled water collection tank (23). The inlet of the secondary distillation apparatus (21) is connected to one of the primary distilled water collection tanks (13). The secondary condenser (22) is installed inside the secondary distillation apparatus (21). The outlet of the secondary distillation apparatus (21) is connected to the secondary distilled water collection tank (23). The outlet of the secondary condenser (22) is connected to the condensate collection tank (3). The circulating pump (31) is also used to transport the condensate in the condensate collection tank (3) to the secondary condenser (22). The flow meter (5) is installed at the inlet of the secondary condenser (22), and the controller (6) is used to control the secondary distillation unit (2) to stop operating when the tap water flow rate at the inlet of the secondary condenser (22) is less than a preset threshold.

5. A two-stage distillation apparatus according to claim 4, characterized in that, A water seal vent hole (121) is provided on the primary condenser (12) or the secondary condenser (22).

6. The two-stage distillation apparatus according to claim 1, characterized in that, A filter screen is also provided at the tap water outlet (4).

7. A two-stage distillation apparatus according to claim 4, characterized in that, Both the primary condenser (12) and the secondary condenser (22) are spiral-shaped.

8. A two-stage distillation apparatus according to claim 7, characterized in that, From top to bottom, the diameter of the primary condenser (12) or the secondary condenser (22) gradually decreases.

9. A two-stage distillation apparatus according to claim 2, characterized in that, The solar power supply unit (7) includes a solar panel and a battery. The solar panel is used to convert solar energy into electrical energy, and the battery is connected to the solar panel to store electrical energy.

10. A two-stage distillation apparatus according to claim 1, characterized in that, The condensate collection tank (3) is also equipped with a TDS detector for detecting the TDS value of the condensate; the condensate collection tank (3) is also equipped with a temperature sensor for detecting the temperature of the condensate.

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