A pure water preparation device and a method for preparing pure water using environmental temperature difference

Abstract

The scheme discloses a pure water production technical field, a kind of pure water preparation device, including inside hollow and all be circular table shape's outer circulation frame and inner circulation frame, inner circulation frame is located in outer circulation frame and the gap is left between two, the bottom of outer circulation frame is equipped with first air inlet, and first air inlet is communicated with the gap;The outer wall of the inner circulation frame is equipped with heat circulation plate, and the end of heat circulation plate and inner circulation frame connection extends into inner circulation frame, and the bottom of inner circulation frame is equipped with bus board, and the second air inlet that is communicated with outside is equipped on inner circulation frame.Use, pure water preparation device is installed to the water tank above natural volatilization, and make water tank evaporation water vapor enter into inner circulation frame, and the inside and outside temperature difference of inner circulation frame is 15~32 ℃.Through the pure water preparation device of the application, the energy consumption of preparation can be significantly reduced.

Description

Technical Field

[0001] This invention belongs to the field of pure water production technology, and specifically relates to a pure water production device and a method for producing pure water using ambient temperature difference. Background Technology

[0002] In the company's electrolytic aluminum production, rectifier units are used to provide DC power for electrolysis. The method to deal with the large amount of heat generated by the rectifier diodes in the rectifier cabinet is to use a water-to-water heat exchanger for cooling. The internal circulation uses pure water, and its operating consumption is not much, but the consumption during planned maintenance is large. Taking the 350KA series as an example, 1.3 tons of pure water need to be added annually. Adding the demand of the 200KA series, about 1.8 tons of pure water need to be added annually. Pure water has become one of the important conditions for the continuous operation of the water-to-water heat exchanger and to ensure the safe power supply for electrolytic aluminum production.

[0003] The production of pure water generally involves purchasing or installing an electric boiler for heating followed by cooling. This process requires a large volume of pure water, and the current operating power ranges from 2KW to 4KW, with an annual water production of approximately 2.5 tons. Small electric boilers are energy-intensive and require a dedicated cooling water system, operating continuously 24 hours a day. To meet the company's energy-saving and cost-reduction needs and increase production capacity, the existing equipment will inevitably experience increased load. While traditional water production methods can address the pure water supply issue in terms of load and power, these methods struggle to minimize energy consumption and require long-term maintenance and uptime, resulting in poor economic efficiency and safety. Summary of the Invention

[0004] The present invention aims to provide a pure water production device to reduce the energy consumption required for pure water production.

[0005] A pure water production device according to this solution includes a temperature difference effector, an outer circulation frame and an inner circulation frame, both hollow and frustum-shaped. The inner circulation frame is located inside the outer circulation frame with a gap between them. The bottom of the outer circulation frame is provided with a first air inlet, which communicates with the gap. The outer wall of the inner circulation frame is provided with a heat circulation plate, one end of which is connected to the inner circulation frame and extends into the inner circulation frame. The bottom of the inner circulation frame is provided with a manifold, and the inner circulation frame is provided with a second air inlet communicating with the outside. The temperature difference effector includes a controller and two temperature probes, which are located on the inner and outer sides of the inner circulation frame, respectively.

[0006] Furthermore, the top of the outer circulation frame is equipped with a drainage fan that communicates with the gap. The drainage fan facilitates faster adjustment of the temperature difference between the inside and outside of the inner circulation frame.

[0007] Furthermore, two exhaust fans are provided. Since summer temperatures are high, two exhaust fans are generally required; therefore, having two exhaust fans can meet the needs of all four seasons.

[0008] Furthermore, the heat circulation plate has multiple layers. The multi-layered heat circulation plate helps improve the temperature difference regulation capability between the two sides of the inner circulation frame.

[0009] Furthermore, the inclination angle of the inner circulation rack is 60 degrees, and the inclination angle of the outer circulation rack is 45 to 55 degrees.

[0010] Based on the above-mentioned pure water production device, this application also provides a method for producing pure water using the ambient temperature difference, specifically: the pure water production device is installed above a naturally evaporating water tank, and the water vapor evaporated from the water tank enters the inner circulation rack, the temperature difference between the inside and outside of the inner circulation rack is 15℃~32℃.

[0011] The beneficial effects of this application are:

[0012] 1. It is easy to use, making full use of environmental waste heat and water vapor volatilization, solving the collection problem in situations with long distances, eliminating the need for complex boiler equipment, and achieving pure water collection in a relatively safe application. It can achieve large-scale energy collection in the environment.

[0013] 2. By utilizing the low-energy-consuming exhaust fan built into the thermoelectric effector, it can achieve safe application in a low-voltage 24V environment, without the risk of electric shock, and without the need to add other hardware circuits, making it economical.

[0014] 3. Simple maintenance: Because there is no electric auxiliary heating system, the device has a low scaling rate, extended maintenance cycle, and the cleaning structure only requires physical treatment, without the need for acid or alkali solutions, and does not produce wastewater.

[0015] 4. Small scale and low investment, it can increase pure water production capacity by making full use of the waste heat in the production process of the production unit with less investment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a pure water production device according to Embodiment 1 of the present invention. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The reference numerals in the accompanying drawings include: 1. External circulation frame; 2. First air inlet; 3. Internal circulation frame; 4. Heat circulation plate; 5. Drainage fan; 6. Combination plate; 7. Second air inlet; 8. Temperature sensor.

[0019] Example 1 is basically as shown in the appendix. Figure 1As shown: A pure water production device includes an outer circulation frame 1 and an inner circulation frame 3, both hollow and frustum-shaped. Both the outer circulation frame 1 and the inner circulation frame 3 are welded from food-grade stainless steel. The inclination angle of the inner circulation frame 3 is 60 degrees, and the inclination angle of the outer circulation frame 1 is 45-55 degrees. The inner circulation frame 3 is located inside the outer circulation frame 1, with a gap between them. The top gap is 150mm, and the bottom gap is 180mm-250mm. A temperature differential effector is installed at the gap. The temperature differential effector consists of two temperature probes 8 and a controller. The temperature probes 8 are waterproof NTC temperature sensors: model 10KB3950 / 103F3950; the controller is a Bihe rail-mounted solar water heating circulation temperature differential controller, model: BF-D215B+. The bottom of the outer circulation frame 1... The outer circulation frame 1 is provided with a first air inlet 2, which is connected to the gap. The top of the outer circulation frame 1 is provided with a ducting fan (or a fan built into the thermoelectric generator) connected to the gap. The outer wall of the inner circulation frame 3 is provided with multiple layers of heat circulation plates 4. Each layer of heat circulation plates 4 is installed in a different position to form an interlaced pattern. One end of the heat circulation plate 4 connected to the inner circulation frame 3 extends into the inner circulation frame 3. The bottom of the inner circulation frame 3 is provided with an inverted trapezoidal confluence plate 6. The inner circulation frame 3 is provided with a second air inlet 7 connected to the outside.

[0020] Example 2: Using the pure water production device of Example 1, pure water is produced by utilizing the ambient temperature difference. The pure water production device is installed on the water storage tank of the waste heat system of electrolytic aluminum flue gas, and the water vapor evaporated from the water tank enters the inner circulation rack 3. According to the ambient temperature, the induced flow fan 5 is started to ensure that the temperature difference between the inside and outside of the inner circulation rack 3 is 15℃~32℃.

[0021] The pure water production device in Example 1 has a double-layer structure (inner circulation rack 3 and outer circulation rack 1). It utilizes the ambient temperature difference created by a temperature difference effector and adopts an internal physical circulation mode to condense and collect the generated water vapor. The collected pure water is then collected and recycled via a manifold 6. The collected pure water is ready for use after passing inspection. The specific process is as follows:

[0022] Internal circulation: Utilizing the physical temperature difference of the environment, external air enters the internal circulation frame 3 through the second air inlet 7, forming a "chimney effect" that causes the air to flow slowly, carrying water vapor into the internal circulation frame 3. The water vapor is disturbed by the multi-layer specially arranged heat circulation plates 4 inside the internal circulation frame 3, forming a water vapor vortex. It is cooled and condensed on the inner wall of the internal circulation frame 3 and collected in the converging plate 6 for recycling.

[0023] External circulation: The gap structure between the inner circulation frame 3 and the outer circulation frame 1 utilizes the "chimney effect" to form a temperature difference effect chamber. Ambient air enters the gap between the inner circulation frame 3 and the outer circulation frame 1 through the first air inlet 2, and then passes through the temperature difference effector. Utilizing the "chimney effect" and the heat circulation plate 4, an external circulation is formed, creating a cooling temperature difference between the inside and outside of the inner circulation frame 3. The cooling efficiency is regulated by the exhaust fan. Two 45W exhaust fans are installed, but only one is needed in winter.

[0024] Through modeling and testing, the shape of the experimental device, bottom inlet area, bottom-to-height ratio, inner diameter ratio of internal and external circulation structures, temperature difference, time, air volume, collection rate, and pass rate were tracked. The temperature difference range of pure water production can be controlled between 15℃ and 32℃. The daily water production rate of the bottom horizontal area is about 1200ml / ㎡, with a total annual production of 432kg / ㎡. With a water vapor supply area of ​​more than 4㎡, an annual production of more than 1728kg can be achieved.

[0025] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for producing pure water using an ambient temperature difference, characterized in that: The pure water production device includes a temperature difference effector, an outer circulation frame and an inner circulation frame, both hollow and frustum-shaped. The inner circulation frame is located inside the outer circulation frame with a gap between them. The bottom of the outer circulation frame has a first air inlet communicating with the gap. A heat circulation plate is provided on the outer wall of the inner circulation frame, with one end of the heat circulation plate extending into the inner circulation frame. A manifold is provided at the bottom of the inner circulation frame, and a second air inlet communicating with the outside is provided on the inner circulation frame. The temperature difference effector includes a controller and two temperature probes, located on the inner and outer sides of the inner circulation frame respectively. A drainage fan communicating with the gap is provided on the top of the outer circulation frame. The heat circulation plate has multiple layers. The inner circulation frame has an inclination angle of 60 degrees, and the outer circulation frame has an inclination angle of 45-55 degrees. Installed above the water storage tank of the electrolytic aluminum flue gas waste heat system, the water vapor evaporated from the water storage tank enters the inner circulation rack. The temperature difference between the inside and outside of the inner circulation rack is 15℃~32℃. Utilizing the ambient physical temperature difference, external air enters the inner circulation rack through the second air inlet, causing the air to flow slowly and carrying water vapor into the inner circulation rack. Inside the inner circulation rack, the water vapor is disturbed by multiple layers of specially arranged heat circulation plates, forming a water vapor vortex. It is cooled and condensed on the inner wall of the inner circulation rack and collected by the converging plate. The gap structure between the inner and outer circulation racks forms a temperature difference effect chamber. Ambient air enters the gap between the inner and outer circulation racks through the first air inlet, and then passes through the temperature difference effector and heat circulation plates to form an external circulation, creating a cooling temperature difference between the inside and outside of the inner circulation rack. The cooling efficiency is regulated by the duct fan.

2. The method for producing pure water using an ambient temperature difference in the pure water production apparatus according to claim 1, characterized in that: There are two exhaust fans.

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