CN205373439U - Compound binary channels condensation heat transfer device of borosilicate glass aluminum alloy - Google Patents

Abstract

The utility model discloses a high borosilicate glass/aluminum alloy composite double-channel condensation heat exchange device. The heat exchange device adopts a double-channel condensation heat exchange method; the upper part of the heat exchange device includes two air inlets and two air outlets. , the lower part includes two drain ends, and the drain end includes a spiral pipe interface and a straight pipe interface. The heat exchange device adopts a high thermal conductivity aluminum alloy outer casing, and the inner and outer double helix pipes and inner pipes made of high borosilicate glass. Double straight tubes, while filling the gaps inside the heat exchange device with high thermal conductivity silica gel. In the utility model, two spiral tubes and two straight tubes jointly constitute a double condensation heat exchange channel, and the purpose of improving heat exchange efficiency is achieved by using high thermal conductivity materials and a secondary condensation heat exchange method. Under the same working conditions, the gas Condensation is better.

Description

A high borosilicate glass/aluminum alloy composite dual-channel condensation heat exchange device

technical field

The invention belongs to the field of gas condensation heat exchange, and specifically relates to a high borosilicate glass/aluminum alloy composite double-channel condensation heat exchange method and device, which adopts the principle of heat conduction and high borosilicate glass double channels, aluminum alloy outer casing, high thermal conductivity A high-efficiency condensation heat exchange method and device for silica gel.

Background technique

With the continuous development of modern new technology and new technology and the increasingly serious energy problems, more and more demands for high-performance heat exchange devices have been brought. The performance of the heat exchange device plays an important role, sometimes even decisive, on product quality, energy utilization, and system economy and reliability.

For the current common gas condensation heat exchange device, the heat exchange method adopted is to use air or water as the heat exchange medium, and use a glass shell, and the high-temperature gas passes through the heat exchange medium (air or water) in the heat exchange device, The glass shell exchanges heat with the external cold source, so as to achieve the corresponding heat exchange purpose. However, the thermal conductivity of glass is 1.1W/(m K), the thermal conductivity of air is 0.0244W/(m K) under standard conditions, and the thermal conductivity of water at 4°C is 0.58W/(m K ), so the heat exchange device using a glass shell, air or water as the heat exchange medium has low heat exchange efficiency and is difficult to meet the condensation requirements of high-temperature gas.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a high thermal conductivity high borosilicate glass/aluminum alloy composite dual-channel condensation heat exchange method and device, which adopts high borosilicate glass double helical tubes to expand the heat conduction area; adopts aluminum alloy jacket The tube (thermal conductivity is about 220W/(m·K)), and the heat exchange device is filled with high thermal conductivity silica gel (thermal conductivity>10W/(m·K)) to improve heat exchange efficiency. Ultimately, the purpose of improving the heat exchange efficiency of the heat exchange device is achieved.

The technical scheme adopted by the utility model is: a high borosilicate glass/aluminum alloy composite dual-channel condensation heat exchange device, the heat exchange device adopts a dual-channel condensation heat exchange method; the upper part of the heat exchange device includes two air inlets and Two air outlets, the lower part includes two drain ends, the drain end includes a spiral pipe interface and a straight pipe interface, the heat exchange device uses inner and outer double spiral pipes and double straight pipes made of high borosilicate glass, and at The internal void of the heat exchange device is filled with high thermal conductivity silica gel, and the exterior of the entire heat exchange device is fixed and protected by sequentially connected heat-insulating upper head, aluminum alloy outer sleeve, and heat-insulated lower head; among them,

The structure of the external condensation heat exchange channel is as follows: the upper port of the outer spiral tube is connected to the upper port of the outer spiral tube, the upper port of the outer spiral tube is connected to an air inlet, the lower port of the outer spiral tube is connected to the lower port of the outer spiral tube, the lower port of the outer spiral tube is connected to the direct The lower pipe interface is located in the drain port one, the straight pipe lower port is connected to the straight pipe lower port, the straight pipe upper port is connected to the straight pipe upper port, and the straight pipe upper port is connected to an air outlet;

The structure of the internal condensation heat exchange channel is as follows: the upper port of the inner helical tube is connected to the upper port of the inner helical tube, the upper port of the inner helical tube is connected to another air inlet, the lower port of the inner helical tube is connected to the lower port of the inner helical tube, and the lower port of the inner helical tube is connected to the lower port of the inner helical tube. The second lower interface of the straight pipe is located in the second drain end, the second lower interface of the straight pipe is connected to the second lower port of the straight pipe, the upper port of the second straight pipe is connected to the upper interface of the second straight pipe, and the second upper interface of the straight pipe is connected to another air outlet.

Principle of the present utility model is:

The high borosilicate glass/aluminum alloy composite dual-channel condensation heat exchange device of the utility model adopts a dual-channel condensation heat exchange method, and two air inlets and two air outlets are respectively designed on the upper part of the heat exchange device, and two air outlets are designed on the lower part. Drain end, the drain end is designed with a spiral pipe interface and a straight pipe interface. The heat exchange device uses inner and outer double helix pipes and double straight pipes made of high borosilicate glass. At the same time, the internal gap of the heat exchange device is filled with high thermal conductivity Silica gel 13, the whole device is fixed and protected by heat-insulating upper head 14, aluminum alloy outer casing 15, and heat-insulated lower head 16. The upper port of the outer helical pipe 5 is connected to the upper port 1 of the outer helical pipe, the lower port of the outer helical pipe 5 is connected to the lower port 9 of the outer helical pipe, the lower port 9 of the outer helical pipe and the lower port 10 of the straight pipe are located in the drain end 18, and the lower port of the straight pipe is one The interface 10 is connected to the lower port of the straight pipe-7, and the upper port of the straight pipe-7 is connected to the upper port 2 of the straight pipe-1. The lower port of the tube 6 is connected to the lower port 11 of the inner helical pipe, the lower port 11 of the inner helical pipe and the lower port 12 of the second straight pipe are located in the drain port 2 17, the lower port 12 of the second straight pipe is connected to the lower port of the second straight pipe 8, and the lower port 12 of the second straight pipe is connected to the lower port of the second straight pipe 8. The upper port is connected with the second upper port 4 of the straight pipe, which is designed as an internal condensation heat exchange channel.

There are usually three basic ways of heat transfer: heat conduction, heat convection, and heat radiation. The main heat transfer mode of the utility model is heat conduction mode, and the basic equation of heat conduction is: Where Q is the heat flow of heat conduction, λ is the thermal conductivity coefficient, A is the heat conduction area, Δt is the temperature difference on both sides of the plane wall, and b is the thickness of the plane wall. According to the heat conduction equation, it can be seen that when the temperature difference on both sides of the plane wall is constant, the heat conduction heat flux of the plane wall can be increased by increasing the heat conduction area and increasing the thermal conductivity. Just like the related technology adopted in this utility model, first: use spiral tubes in the heat exchange device, and increase the heat conduction area by means of spirals in a limited space; second: design double condensation heat exchange channels in the heat exchange device After entering the device, the high-temperature and humid gas passes through the inner and outer double condensation heat exchange channels to perform two condensation heat exchanges to increase the heat transfer; third: fill the heat exchange device with high thermal conductivity silica gel (thermal conductivity> 10W/(m·K)), the exterior of the device adopts an aluminum alloy outer casing (the thermal conductivity is about 220W/(m·K)), and the thermal conductivity is improved by selecting high thermal conductivity materials.

The condensation heat exchange process is shown in Figure 2. The high-temperature and humid gas enters the device from the spiral tube mouth. When flowing in the spiral tube, the heat conduction process with the outside is quickly realized through the high thermal conductivity silica gel and aluminum alloy outer sleeve, and the high temperature of the gas itself is transferred to the outside. The heat is released quickly, and when it reaches the bottom of the spiral tube, the condensation heat transfer is over, and the condensed water drops down by its own weight, while the low-temperature dry gas flows out of the device along the straight tube.

According to the above analysis, the high borosilicate glass/aluminum alloy composite dual-channel condensation heat transfer method is as follows: high-temperature and humid gas enters the heat exchange device from the upper interface 1 of the outer spiral tube, flows through the outer spiral tube 5, and fills the air through the heat exchange device. The high thermal conductivity silica gel 13 and the aluminum alloy outer sleeve 15 perform condensation and heat exchange with the outside, and the condensed water that the gas is condensed and precipitated flows out of the heat exchange device through the lower interface 9 of the outer spiral tube and the drain end 18, and the condensed and heat-exchanged gas flows from the direct The lower tube interface 10 flows upward through the straight tube-7 to the straight tube-upper interface 2, which is a condensation heat exchange process; then, the gas passes from the straight tube-upper interface 2 to the inner helical tube upper interface 3, and enters the heat exchange again device, flows through the inner spiral tube 6, and conducts secondary condensation heat exchange with the outside through the high thermal conductivity silica gel 13 and aluminum alloy outer sleeve 15 filled in the heat exchange device. Similarly, the condensed water that is condensed again passes through the lower interface of the inner spiral tube 11. The drain end 2 17 flows out of the heat exchange device, and the low-temperature dry gas after the second condensation heat exchange flows upward from the lower interface 12 of the second straight pipe through the second upper interface 4 of the second straight pipe to reach the upper interface 4 of the second straight pipe, so far the second condensation heat exchange process Completed, that is, the condensation heat exchange process of the entire heat exchange device ends.

Compared with the prior art, the utility model has the following advantages:

The utility model adopts high borosilicate glass material to make double channels, and at the same time, an aluminum alloy outer casing (thermal conductivity is about 220W/(m K)) is used outside the device, and high thermal conductivity silica gel is filled in the heat exchange device (thermal conductivity> 10W/(m·K)), two spiral tubes and two straight tubes together form a double condensation heat transfer channel, through the use of high thermal conductivity materials and secondary condensation heat transfer method to achieve the purpose of improving heat transfer efficiency, in the same Under certain working conditions, the gas condensation effect is better.

Description of drawings

Fig. 1 is the structural representation of the device of the present utility model;

In the figure: 1 is the upper interface of the outer spiral tube; 2 is the first upper interface of the straight tube; 3 is the upper interface of the inner helical tube; 4 is the second upper interface of the straight tube; 5 is the outer helical tube; 6 is the inner helical tube; 7 is the straight Tube 1; 8 is the second straight tube; 9 is the lower interface of the outer spiral tube; 10 is the lower interface of the straight tube; 11 is the lower interface of the inner spiral tube; 12 is the lower interface of the second straight tube; 13 is high thermal conductivity filled silica gel; Heat upper head; 15 is the aluminum alloy outer casing; 16 is the heat insulation lower head; 17 is the second drain end; 18 is the first drain end;

Fig. 2 is a schematic diagram of a single channel condensation heat exchange process of the device of the present invention, wherein 21 represents high-temperature humid gas, 22 represents low-temperature dry gas, 23 represents condensed water, 24 represents heat transfer, 25 represents a spiral tube, and 26 represents a straight tube ;

detailed description

Below in conjunction with accompanying drawing and specific embodiment further illustrate the utility model.

The structure of this embodiment is shown in Figure 1. The double-channel condensation heat exchange method is adopted. Two air inlets and two air outlets are respectively designed on the upper part of the heat exchange device, and two drain ports are designed on the lower part. Helical tube interface and straight tube interface, the heat exchange device uses inner and outer double helix tubes and double straight tubes made of high borosilicate glass, and at the same time fills the internal gap of the heat exchange device with high thermal conductivity silica gel 13, and the entire device uses insulation The thermal upper sealing head 14, the aluminum alloy outer casing 15, and the heat insulating lower sealing head 16 are fixed and protected. The upper port of the outer helical pipe 5 is connected to the upper port 1 of the outer helical pipe, the lower port of the outer helical pipe 5 is connected to the lower port 9 of the outer helical pipe, the lower port 9 of the outer helical pipe and the lower port 10 of the straight pipe are located in the drain end 18, and the lower port of the straight pipe is one The interface 10 is connected to the lower port of the straight pipe-7, and the upper port of the straight pipe-7 is connected to the upper port 2 of the straight pipe-1. The lower port of the tube 6 is connected to the lower port 11 of the inner helical pipe, the lower port 11 of the inner helical pipe and the lower port 12 of the second straight pipe are located in the drain port 2 17, the lower port 12 of the second straight pipe is connected to the lower port of the second straight pipe 8, and the lower port 12 of the second straight pipe is connected to the lower port of the second straight pipe 8. The upper port is connected with the second upper port 4 of the straight pipe, which is designed as an internal condensation heat exchange channel.

When the device is working, the high-temperature and humid gas enters the heat exchange device from the upper interface 1 of the outer spiral tube, flows through the outer spiral tube 5, and conducts condensation exchange with the outside through the high thermal conductivity silica gel 13 and the aluminum alloy outer sleeve 15 filled in the heat exchange device. Heat, the condensed water that the gas condenses and precipitates flows out of the heat exchange device through the lower interface 9 and the drain end 18 of the outer spiral tube. Interface 2, this is a condensation heat exchange process; then, the gas goes from the straight pipe to the upper interface 2 to the inner helical tube upper interface 3, enters the heat exchange device again, flows through the inner helical tube 6, and passes through the high The heat-conducting silica gel 13 and the aluminum alloy outer sleeve 15 perform secondary condensation and heat exchange with the outside. Similarly, the condensed water that is condensed again flows out of the heat exchange device through the lower interface 11 of the inner spiral tube and the second drain end 17. After the secondary condensation and heat exchange The low-temperature dry gas flows upward from the lower interface 12 of the second straight pipe through the second straight pipe 8 to the upper interface 4 of the second straight pipe. At this point, the secondary condensation and heat exchange is completed, that is, the condensation and heat exchange process of the entire heat exchange device is completed, and through the secondary condensation The heat exchange will precipitate condensed water from the high-temperature humid gas at about 4°C, and the condensed water will be discharged from the first and second drain ports, and the low-temperature dry gas will flow out from the upper interface of the second straight pipe.

Claims (1)

1. The utility model provides a compound binary channels condensation heat transfer device of borosilicate glass aluminum alloy which characterized in that: the heat exchange device adopts double-channel condensation heat exchange treatment; the upper part of the heat exchange device comprises two air inlets and two air outlets, the lower part of the heat exchange device comprises two water discharging ends, the water discharging ends internally comprise spiral pipe interfaces and straight pipe interfaces, the heat exchange device is externally provided with a high-heat-conductivity aluminum alloy outer sleeve, internally provided with inner and outer double spiral pipes and double straight pipes made of high borosilicate glass, and simultaneously, high-heat-conductivity silica gel (13) is filled in the gap part inside the heat exchange device, and the whole heat exchange device is externally fixed and protected by a heat-insulating upper end enclosure (14), an aluminum alloy outer sleeve (15) and a heat-insulating lower end enclosure (16) which are sequentially connected; wherein,

the structure of the external condensation heat exchange channel is as follows: an upper port of an outer spiral pipe (5) is connected with an upper port (1) of the outer spiral pipe, the upper port (1) of the outer spiral pipe is connected with an air inlet, a lower port of the outer spiral pipe (5) is connected with a lower port (9) of the outer spiral pipe, the lower port (9) of the outer spiral pipe and a lower port (10) of a straight pipe are positioned in a first drainage end (18), the lower port (10) of the straight pipe is connected with a lower port of a first straight pipe (7), an upper port of the first straight pipe (7) is connected with an upper port (2) of the straight pipe, and the upper port (2) of the first straight pipe is connected;

The internal condensation heat exchange channel structure is as follows: an upper port of the inner spiral pipe (6) is connected with an upper port (3) of the inner spiral pipe, the upper port (3) of the inner spiral pipe is connected with another air inlet, a lower port of the inner spiral pipe (6) is connected with a lower port (11) of the inner spiral pipe, the lower port (11) of the inner spiral pipe and a second straight pipe lower port (12) are located in a second drainage end (17), the lower port (12) of the second straight pipe is connected with a second straight pipe (8) lower port, an upper port of the second straight pipe (8) is connected with a second straight pipe upper port (4), and the second straight pipe upper port (4) is connected with another air outlet.