CN107082462A - A kind of modified and reinforced tubular type fresh-water generator in surface - Google Patents

Abstract

The invention discloses a surface-modified and strengthened tubular seawater desalinator. A hydrophobic film is arranged on the inner wall of the condensation sleeve. A hydrophilic film is provided on the side outer wall, and the seawater overflowing from the evaporation tank is collected by the overflow recovery tank. The overflow pipe is connected to the bottom of the left end plate of the overflow recovery tank, and the right end of the overflow recovery tank is suspended on the On the two heat-conducting pipes; a water inlet pipe is arranged on the top wall in the middle of the condensation sleeve, and a water outlet pipe is connected to the bottom wall. The present invention hangs the overflow recovery tank at the lower end of the evaporation tank to collect and discharge the overflow seawater, which can not only prevent the evaporation loss of the condensed water due to absorbing the heat of the evaporation tank, but also make full use of the outer wall of the evaporation tank and increase the At the same time, a hydrophobic film is set on the inner wall of the condensation sleeve. The hydrophobic film is easy to clean, can promote condensation and increase the return rate of fresh water, and is anti-pollution and anti-adhesion.

Description

A Tubular Seawater Desalinator with Surface Modification and Strengthening

technical field

The invention belongs to the technical field of seawater desalination, and in particular relates to a surface-modified and strengthened tubular seawater desalinator.

Background technique

There are many ways to produce fresh water from seawater or brackish water. At present, there are two types of relatively mature and large-scale technologies, one is membrane seawater desalination system, and the other is distillation seawater desalination system. Chinese patent ZL201110006487.0 announced on December 26, 2012 a multi-effect casing solar seawater desalination device with light concentrating function, including casing, casing, water tank, solar concentrator, light collector, heating Pipes, connecting pipes, fresh water output pipes and water storage tanks, wherein the shell is a tubular cylindrical vacuum shell, the water tank is a circular shell with an axial opening on the shell, and the water tank and casing are set in the shell step by step. The space not filled with seawater between the water tank and the casing or the casing constitutes an evaporation-condensation chamber, and a water tank is installed in the casing of the last stage, and a heating pipe is installed in the water tank along the axial direction; the connecting pipe is connected with the water tanks of all levels The shell and the bottom of the inner wall of the casing are connected with the fresh water output pipe, and the fresh water output pipe is connected to the water storage tank; the solar concentrator is arranged directly under the outer shell, and the inner wall of the last stage of the water tank is provided with a light collector. The structure of the above desalination device is complicated, and the production cost is high, and the seawater in the water tank is easy to overflow and mix with the condensed fresh water, thereby affecting the effect of seawater desalination.

Chinese patent ZL 201210072717.8 announced on April 10, 2013 a hydrophilic evaporation tank for tubular solar seawater desalination devices, and specifically disclosed that the hydrophilic evaporation tank includes a water tank, a hydrophilic ceramic membrane, and a water collection wing , Water collector; wherein the water tank is a cylindrical shell with an axial opening on the shell, and the outer edges of both sides of the top of the water tank are uniformly distributed with water holes along the axial direction, and the outer surface of the water tank is evenly distributed with honeycomb holes and the water tank A layer of hydrophilic ceramic film is evenly attached to the outer surface of the water tank, and grooves are symmetrically opened on the lower side of the outer surface of the water tank. The outer edge of the groove is welded with an arc-shaped water fin that is as long as the water tank, and one end of the water tank is semi-closed. The other end is closed, a water collector is installed at one end of the water storage tank, and a drainage hole is opened on the water collector, and one end of the water collector wing communicates with the inner cavity of the water collector. The above-mentioned structure uses water catchment fins, water collectors, and drainage holes to collect and discharge overflowing seawater. If the water catchment fins and water catchers are processed, if they are fully welded so that they are attached to the evaporation tank, it will cause The evaporation tank is deformed by heat. If spot welding is adopted, the sealing is insufficient, so it is inconvenient to process.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a surface-modified and strengthened tubular seawater desalination device.

The technical scheme of the present invention is as follows: a surface-modified and strengthened tubular seawater desalinator, comprising a condensation sleeve, an evaporation tank and a heat transfer pipe, characterized in that: a hydrophobic film is arranged on the inner wall of the condensation sleeve, the The left and right ends of the condensation sleeve are respectively sealed by the first flange and the second flange, and two heat pipes arranged side by side pass through the first flange, the evaporation tank and the second flange in turn, so that the evaporation tank is fixed on the condensation sleeve In the tube, a hydrophilic film is provided on the outer wall of the evaporation tank, and the seawater overflowing from the evaporation tank is collected by the overflow recovery tank, which is arranged directly below the evaporation tank, and the bottom of the evaporation tank is located at the overflow In the overflow recovery tank, the bottom of the left end plate of the overflow recovery tank is connected with an overflow pipe, and the overflow pipe extends out of the first flange, and the left end of the overflow recovery tank is fixedly supported by the overflow pipe, and the overflow The bottom of the right end plate of the recovery tank is integrally formed with two lugs with hanging holes, and the right end of the overflow recovery tank is suspended on the two heat pipes through these two lugs; A water pipe, the lower port of the water inlet pipe extends into the evaporation tank, and the bottom wall in the middle of the condensation sleeve is connected with a water outlet pipe, and the water outlet pipe communicates with the inside of the condensation sleeve.

With the above technical scheme, seawater enters the evaporation tank through the water inlet pipe, heats the seawater in the evaporation tank and on the hydrophilic film through the heat conduction tube, generates steam that condenses at the hydrophobic film on the inner wall of the condensation sleeve, and the fresh water produced quickly slides down along the hydrophobic film to At the bottom of the condensation sleeve, the fresh water flows out through the outlet pipe after gathering at the bottom of the condensation sleeve, and finally enters the fresh water storage tank. At the same time, the excess overflow seawater on both sides of the evaporation tank is collected by the overflow recovery tank and finally discharged from the overflow pipe.

The water inlet pipe and the water outlet pipe are arranged in the middle of the condensation sleeve to ensure uniform water temperature; the lower port of the water inlet pipe extends into the evaporating tank, which is lower than the liquid level when the evaporating tank is filled with seawater, so that after the evaporating tank is filled with seawater, , to prevent splashing with the seawater surface of the evaporation tank when the subsequent water intake, and also reduce the outward diffusion of water vapor in the desalinator.

The hydrophobic film is set on the inner wall of the condensation sleeve, which is mainly to facilitate the cleaning of the fresh water area, promote condensation and increase the return rate of fresh water, that is, the hydrophobic film is anti-pollution and easy to clean, and guarantees the purity of the desalinated water in the later stage; on the one hand, it promotes the formation of droplets Form condensation avoids the thermal resistance of the liquid film during film condensation, enhances heat transfer, and accelerates condensation; on the other hand, condensed water is not easy to stay on its surface, which accelerates the rapid flow of condensed water and improves desalination efficiency.

An overflow recovery tank is suspended at the lower end of the evaporation tank to collect and discharge the overflow seawater. On the one hand, the convective heat transfer heat resistance and radiation heat transfer heat resistance at the evaporating tank and the condensed water are increased to prevent the condensed water from evaporating and losing due to absorbing the heat of the evaporating tank; on the other hand, the outer wall of the evaporating tank can be hydrophilically modified , the outer wall surface of the evaporation tank is more fully utilized, and the hydrophilic modification area is increased to a greater extent, which further increases the evaporation area; in addition, it is easy to process.

The left end of the overflow recovery tank is fixedly supported by the overflow pipe, and the right end is suspended and installed on two heat transfer pipes. The installation structure of the overflow recovery tank is extremely simple, and the installation is reliable and stable, which can further reduce production costs.

Preferably, the hydrophobic film is a nano anti-stick and anti-pollution ceramic coating.

The tops at both ends of the evaporation tank and the tops on both sides are at the same height, so as to ensure that the hydrophilic modification part has overflowing seawater, and then the hydrophilic modification effect can be maximized.

The cross-section of the overflow recovery tank is arc-shaped with the arc top down, and the right end of the overflow recovery tank is slightly higher than the left end, so that the seawater in the overflow recovery tank flows out of the overflow pipe quickly, and the desalination can be reflected in time The amount of seawater overflow in the device can be controlled in order to better control the water inlet speed.

Preferably, the hydrophilic membrane is plasma sprayed alumina.

The water inlet pipe is composed of two vertical sections dislocated up and down and a horizontal "S" section in the middle, and the bottom wall at the highest point of the horizontal "S" section is higher than the top wall at the lowest point. On the one hand, the structure of the water inlet pipe is simple in shape and easy to manufacture; on the other hand, the structure of the water inlet pipe is equivalent to a connecting device, which can reduce or prevent the loss of water vapor and heat in the desalinator.

Similarly, the structure of the water outlet pipe is the same as that of the water inlet pipe.

Preferably, the condensation sleeve, evaporation tank, heat pipe, first flange, second flange, overflow recovery tank, overflow pipe, water inlet pipe and water outlet pipe are all made of stainless steel.

Beneficial effects: the present invention has ingenious design, simple structure, easy processing and assembly, and low production cost; the overflow recovery tank is suspended at the lower end of the evaporation tank to collect and discharge the overflow seawater, which can prevent the condensed water from absorbing the heat of the evaporation tank Evaporation loss can be used more fully on the outer wall of the evaporation tank, and the hydrophilic modification area is increased to a greater extent, that is, the evaporation area is increased; at the same time, a hydrophobic film is set on the inner wall of the condensation sleeve, which can strengthen heat transfer, promote condensation and Increase fresh water return rate. The later cleaning work is convenient, in which the flange (easy to disassemble) and the hydrophobic membrane (anti-pollution, anti-adhesion) all play an important role.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of the left end of the overflow recovery tank of the present invention.

Fig. 3 is a structural schematic diagram of the right end of the overflow recovery tank of the present invention.

Fig. 4 is a schematic cross-sectional view of the present invention.

Fig. 5 is a schematic structural view of the water inlet pipe of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

As shown in Figures 1 to 5, the present invention consists of a condensation sleeve 1, an evaporation tank 2, a heat pipe 3, a first flange 4, a second flange 5, an overflow recovery tank 6, an overflow pipe 7, and a water inlet pipe. 8 and outlet pipe 9 etc. form. Wherein, the condensation sleeve 1 is a straight-through pipe structure and is made of stainless steel. A hydrophobic film 1a is provided on the inner wall of the condensation sleeve 1, and the hydrophobic film 1a is preferably a nano anti-stick and anti-pollution ceramic coating. Of course, as an equivalent replacement, the hydrophobic membrane 1a can also be made of other suitable materials. The left end of the condensation sleeve 1 is welded to the first flange 4, the right end of the condensation sleeve 1 is welded to the second flange 5, and the left and right ends of the condensation sleeve 1 are respectively sealed by the first flange 4 and the second flange 5, and Both the first flange 4 and the second flange 5 are made of stainless steel.

As shown in Figures 1 and 4, an evaporation tank 2 is provided in the condensation sleeve 1. The structure of the evaporation tank 2 is the same as that of the prior art. on the same height. The evaporation tank 2 is also made of stainless steel, and a hydrophilic film 2a is arranged on the peripheral outer wall of the evaporation tank 2, and the hydrophilic film 2a is preferably plasma sprayed alumina. Of course, as an equivalent replacement, the hydrophilic membrane 2a may also be made of other suitable materials. Two heat conduction tubes 3 are arranged in parallel front and back, and these two heat conduction tubes 3 pass through the first flange 4 , the evaporation tank 2 and the second flange 5 in sequence, so that the evaporation tank 2 is fixed in the condensation sleeve 1 .

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, the seawater overflowing from the evaporation tank 2 is collected by the overflow recovery tank 6, which is arranged directly below the evaporation tank 2, and the overflow recovery tank The cross section of 6 is arc-shaped with the arc top down, and the right end of the overflow recovery tank 6 is slightly higher than the left end, and the bottom of the evaporation tank 2 is located in the overflow recovery tank 6 . The overflow recovery tank 6 is made of stainless steel. An overflow pipe 7 is connected to the bottom of the left end plate of the overflow recovery tank 6. The overflow pipe 7 extends outside the first flange 4. The left end of the overflow recovery tank 6 passes through the overflow The flow tube 7 is fixedly supported. The bottom of the right end plate of the overflow recovery tank 6 integrally forms two lugs 6a with hanging holes. on the root heat pipe 3.

As shown in Fig. 1 and Fig. 5, a water inlet pipe 8 is provided on the top wall of the middle part of the condensation jacket 1, and the water inlet pipe 8 is made of stainless steel. The water inlet pipe 8 is composed of two vertical sections dislocated up and down and a horizontal "S" section in the middle, and the bottom wall at the highest point of the horizontal "S" section is higher than the top wall at the lowest point (see the height of line a in Figure 5). on line b). The lower port of the water inlet pipe 8 passes through the top wall of the condensation sleeve 1 and extends into the evaporation tank 2 . A water outlet pipe 9 is connected to the bottom wall at the middle part of the condensation sleeve 1, and the structure of the water outlet pipe 9 is the same as that of the water inlet pipe 8, and the water outlet pipe 9 is also made of stainless steel. And the water outlet pipe 9 communicates with the inside of the condensation sleeve 1 .

The working principle of the present invention is as follows:

Seawater enters the evaporation tank 2 through the water inlet pipe 8, heats the seawater in the evaporation tank 2 and on the hydrophilic film 2a through the heat conduction pipe 3, and generates steam that condenses on the hydrophobic film 1a on the inner wall of the condensation sleeve 1, and the fresh water produced along the hydrophobic film 1a Quickly slide down to the bottom of the condensation sleeve 1, and the fresh water flows out through the outlet pipe 9 after gathering at the inner bottom of the condensation sleeve 1, and finally enters the fresh water storage tank (not shown in the figure). At the same time, the excess overflow seawater on the outer walls of both sides of the evaporation tank 2 is collected by the overflow recovery tank 6 and finally discharged from the overflow pipe 7 .

Claims (8)

1. a kind of modified and reinforced tubular type fresh-water generator in surface, including condensation sleeve pipe (1), evaporator tank (2) and heat conducting pipe (3), It is characterized in that：Hydrophobic membrane (1a) is provided with the inwall of the condensation sleeve pipe (1), the left and right ends of the condensation sleeve pipe (1) Sealed respectively by first flange (4) and second flange (5), the heat conducting pipe (3) before and after two side by side sequentially passes through first flange (4), evaporator tank (2) and second flange (5), make evaporator tank (2) be fixed in condensation sleeve pipe (1), outside the week side of boss of evaporator tank (2) Wall is provided with hydrophilic film (2a), and the seawater gone out from evaporator tank (2) overflow is collected by overflow accumulator tank (6), the overflow accumulator tank (6) The underface of evaporator tank (2) is arranged at, and the bottom of evaporator tank (2) is located in overflow accumulator tank (6), the overflow accumulator tank (6) bottom of first member plate is connected to overflow pipe (7), and the overflow pipe (7) stretches out first flange (4) outside, the overflow accumulator tank (6) Left end is supported by the way that overflow pipe (7) is fixed, and the bottom of overflow accumulator tank (6) right end plate is integrally formed two journal stirrups with hanging hole (6a), the right-hand member of overflow accumulator tank (6) is suspended on two heat conducting pipes (3) by the two journal stirrups (6a)；In the condenser jacket Manage and water inlet pipe (8) is set on the roof in the middle part of (1), the lower port of the water inlet pipe (8) is stretched into evaporator tank (2), condensation sleeve pipe (1) The bottom wall at middle part is connected to outlet pipe (9), and the outlet pipe (9) connects with the inside of condensation sleeve pipe (1).

2. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 1, it is characterised in that：It is described hydrophobic Film (1a) is nanometer anti-sticking antipollution ceramic coating.

3. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 1, it is characterised in that：The evaporation The top at groove (2) two ends and the top of both sides are located on sustained height.

4. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 1, it is characterised in that：The overflow The cross section of accumulator tank (6) is the circular arc under arc is withstood on, and the right-hand member of overflow accumulator tank (6) is slightly above left end.

5. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 1, it is characterised in that：It is described hydrophilic Film (2a) is plasma sprayed aluminum.

6. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 1 or 2 or 3 or 4 or 5, its feature It is：The water inlet pipe (8) is made up of two vertical sections and middle accumbency " S " section misplaced up and down, and accumbency " S " section highest The bottom wall of point is higher than the roof of minimum point.

7. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 6, it is characterised in that：The water outlet The structure for managing (9) is identical with water inlet pipe (8).

8. a kind of modified and reinforced tubular type fresh-water generator in surface according to claim 7, it is characterised in that：The condensation Sleeve pipe (1), evaporator tank (2), heat conducting pipe (3), first flange (4), second flange (5), overflow accumulator tank (6), overflow pipe (7), Water inlet pipe (8) and outlet pipe (9) are made of stainless steel.