CN104986818B - Solar seawater desalination power generation device for ships - Google Patents

Abstract

The solar seawater desalination power generation device for the ship comprises a heat collection frame, a heating box and a fresh water collection box, wherein parabolic mirrors are uniformly distributed on the heat collection frame; the heat collecting pipes are arranged on the parabolic mirrors, two ends of each heat collecting pipe are connected with 2 liquid pumps, and a circulating pipeline penetrating through the heating box is connected between the two liquid pumps; compared with the prior art, the invention has the advantages that: the heat conduction oil is heated by solar energy, the heat conduction oil in the heat collection pipe can be heated to 400 ℃, and the seawater in the heating box is heated and distilled through the circulating pipeline, so that energy is saved; the device is simple and convenient, small in appearance, small in occupied area, energy-saving, green and environment-friendly, and all energy is provided by solar energy.

Description

Solar seawater desalination power generation device for ships

technical field

The invention belongs to the technical field of environmental protection machinery, and in particular relates to a solar seawater desalination power generation device for ships.

Background technique

Seawater desalination is the use of seawater desalination to produce fresh water. It is an open-source incremental technology to realize the utilization of water resources, which can increase the total amount of fresh water without being affected by time, space and climate, and can guarantee stable water supply such as drinking water for coastal residents and replenishment water for industrial boilers.

The process of obtaining fresh water from sea water is called desalination. Currently used seawater desalination methods include seawater freezing method, electrodialysis method, distillation method, and reverse osmosis method. At present, the reverse osmosis method using reverse osmosis membrane quickly occupies the market due to its advantages of simple equipment, easy maintenance and equipment modularization, gradually replacing Distillation became the most widely used method.

More than 100 scientific research institutions in more than 10 countries are conducting seawater desalination research, and hundreds of seawater desalination facilities with different structures and capacities are working. A modern large-scale seawater desalination plant can produce thousands, tens of thousands or even nearly one million tons of fresh water every day. The cost of desalinated water is constantly decreasing, and in some countries it has been reduced to almost the same price as tap water. Desalinated water in some areas has reached the size of national and urban water supplies.

Patent Publication No. CN203639186U A waste heat utilization seawater desalination system is characterized in that it includes a sequentially connected controller, a diesel generator, a diesel engine chimney, a flue gas pipe, a flue gas heat exchanger for recovering the exhaust heat of the diesel generator, and seawater For the desalination device, a cylinder liner is provided outside the diesel generator, and the cylinder liner is connected to the seawater desalination device through a cooling water pipe; the flue gas heat exchanger is connected to the diesel generator through a flue gas pipeline; the flue gas exchanger The heater is connected with the diesel generator through a hot water pipe.

Another example is the patent publication number CN102765770A, a high-efficiency seawater desalination machine, which is characterized in that: it includes a solar seawater desalination power generation device for ships and a water supply tank; the solar seawater desalination power generation device for ships is connected to the water supply tank through pipelines; The solar seawater desalination power generation device for ships is a vertical airtight container, which includes a high-pressure water chamber, a heat exchange chamber, a tube sheet, a horizontal grooved pipe, an injector, a heat exchange surface, a film former, a baffle and multiple heat pipes The high-pressure water chamber is adjacent to the heat exchange chamber, the high-pressure water chamber is located above the heat exchange chamber, and the two chambers are separated by a tube plate; the wall of the high-pressure water chamber is provided with a seawater inlet, and the horizontal grooved pipe is vertical or After circling through the high-pressure water chamber, it leads to the outside; the ejector, heat exchange surface, film forming device, and baffle are arranged in the heat exchange chamber, and their centerlines are consistent with the centerline of the device; The injector is a hollow cone, the lower edge of the injector extends vertically downward to the bottom of the heat exchange chamber, the side of the injector is provided with multiple rows of nozzle holes along the circumference, and the bottom of the heat exchange chamber is provided with a flue gas inlet and an injector cavity The cavity is connected; the heat exchange surface is a hollow circular platform completely covering the injector, the lower edge of the heat exchange surface extends vertically downward to the bottom surface of the heat exchange chamber, and the heat exchange surface and the bottom surface and sides of the heat exchange chamber form a sink , the bottom of the heat exchange chamber is provided with a sewage outlet to communicate with the sink, the inner surface of the heat exchange surface is a smooth surface, and the outer surface of the heat exchange surface is a rough surface coated with a metal porous layer; the film forming device is composed of two concentric vertical The tubes are nested together, the inner tube is connected to the end edge of the heat exchange surface and the horizontal grooved tube respectively, the upper edge of the outer tube is connected to the end edge of the tube plate opening, and the lower end edge is located above the end edge of the heat exchange surface. And the axial swirl vanes are arranged in the narrow interlayer channel formed between the inner and outer pipes; the baffle plate is composed of a frustum-shaped heat shield and a section of vertical pipe connected to the upper edge of the heat shield, and the upper edge of the vertical pipe is The position below the tube sheet is higher than the lower edge of the outer tube of the film former, and the baffle is above the heat exchange surface and outside the film former. The lower edge of the baffle is connected to the wall of the heat exchange chamber to form a fresh water tank. The wall of the heat chamber is provided with a fresh water outlet to communicate with the fresh water tank, and an air inlet is provided on the wall of the heat exchange chamber above the baffle; the plurality of heat pipes are covered on the surface of the tube plate, and run through the high pressure water chamber and the heat exchange chamber. In the space above the baffle plate of the chamber, the outer walls of each heat pipe are connected to the edge of the opening of the tube plate, and the outer surface of the heat pipe section in the space where the heat exchange chamber is located has a vertical groove with a V-shaped section.

At present, the existing solar seawater desalination power generation devices for ships are mainly divided into two types: 1. The main disadvantages of passive solar distillation systems: 1) The latent heat of steam has not been reused; 2) The heat capacity of seawater is too large; 3) The device The internal natural convection mode limits the improvement of device performance; 2. The main disadvantages of the active solar distillation system: 1) The equipment cost is relatively high; 2) It needs to consume a certain amount of electric energy, which is not conducive to the use of remote island residents. At the same time, both of the above two methods need to consume electric energy to drive the desalination of equipment operation, which will consume a large amount of energy, which is a relatively large burden for ships in navigation.

Contents of the invention

Aiming at the disadvantages of the prior art, the present invention proposes a solar-powered seawater desalination power generation device for ships. The device heats heat-conducting oil through solar energy, distills seawater, and generates fresh water, which is fast, does not require energy, and is environmentally friendly.

For realizing the purpose of the present invention, the technical scheme that the present invention adopts is:

The solar seawater desalination power generation device for ships is characterized in that it includes a heat collecting frame, a heating box and a fresh water collecting box, and parabolic mirrors are evenly distributed on the heat collecting frame; the heat collecting tube is installed on the parabolic mirror, and its two ends are connected with A liquid suction pump, the number of the liquid suction pumps is 2, and a circulation pipeline passing through the heating box is connected between the two;

A water collecting cloth is installed on the top of the heating box, and a fresh water collecting pipe is installed under the water collecting cloth, and water delivery strips are evenly distributed between the fresh water collecting pipe and the water collecting cloth. There is a round hole in the cloth, and the drip end of the water delivery strip extends through the round hole to the inside of the fresh water collection pipe, and the fresh water collection pipe is connected with the drain pipe; there is also a filter screen under the fresh water collection pipe, and the filter screen material is nylon ;

The drainage pipe is connected with the fresh water collection tank, the water delivery pump is installed on the heating box, and a water supply pipeline is connected between the water delivery pump and the heating box, a liquid level gauge is installed on the heating box, and the water delivery pump and the liquid level gauge are connected to each other. A signal transmission line is connected between them, and the water outlet pipe is connected under the fresh water collection tank.

The heating box is also connected with a gas pipeline, and the gas outlet of the gas pipeline is connected with a steam turbine, and the rotating shaft of the generator is connected with the steam turbine. A power distribution cabinet is installed on the side of the generator, the battery pack is installed in the power distribution cabinet, and the generator and the power distribution cabinet are connected with a power transmission line group.

Preferably, a signal transmitter is also included, and a signal line group is connected between the signal transmitter and the water delivery pump and the liquid level gauge. The liquid level gauge is an electronic liquid level gauge.

Preferably, the fresh water collection tank is also provided with a liquid level gauge, and a signal transmission line is connected between the liquid level gauge and the signal transmitter.

Preferably, the level of the water collecting cloth is gradually lowered from the four sides to the middle, and the fresh water collection pipe is inclined from the middle to both sides.

Preferably, the circulation pipeline is provided with branch pipelines inside the heating box, and the branch pipelines are evenly distributed and connected above the circulation pipeline.

Compared with the existing technology, the advantages of the present invention are: using solar energy to heat the heat transfer oil, the heat transfer oil in the heat collecting tube can be heated up to 400 degrees, and the seawater in the heating box is heated and distilled through the circulation pipeline, saving Energy: simple installation, small shape, small footprint and energy-saving effect, all energy is provided by solar energy, green and environmentally friendly.

Description of drawings

A brief description of the invention follows now with the aid of the drawing of an exemplary embodiment. In the attached picture:

Fig. 1 shows the structural layout schematic diagram of the solar seawater desalination power generation device for ships of the present invention;

Fig. 2 shows the structural arrangement schematic diagram of another view direction of the solar seawater desalination power generation device for ships of the present invention;

Fig. 3 shows a schematic diagram of the structural arrangement of the heat collecting frame of the present invention.

detailed description

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1

As shown in the figure, the solar seawater desalination power generation device for ships includes a heat collecting frame 3, a heating box 13 and a fresh water collecting box 19. Parabolic mirrors 6 are evenly distributed on the heat collecting frame 3; heat collecting tubes 5 are installed on the parabolic mirror 6, its two ends are connected with a liquid suction pump 1, the number of the liquid suction pumps 1 is two, and a circulation pipeline 10 passing through the heating box 13 is connected between the two. An adjustment gate 2 is installed on the outside of the pump 1, and the parabolic mirror 6 is arc-shaped, and a plurality of parabolic mirrors 6 are installed and integrated through the collection piece 9 to form a circular arc shape, and are locked and fixed with the collection piece 9 by screws 8, and the parabolic mirror 6 Positioning holes 7 are evenly arranged on both ends according to the axis, and are used to adjust the offset angle of the heat collecting tube 5 .

A water collecting cloth 14 is installed on the inner top of the heating box 13, and a fresh water collecting pipe 21 is installed below the water collecting cloth 14, and a water delivery bar 18 is evenly distributed between the fresh water collecting pipe 21 and the water collecting cloth 14, and the water collecting The cloth 14 and the water delivery bar 18 are made of nylon, and the fresh water collection pipe 21 is evenly distributed with round holes, and the drip end of the water delivery bar 18 extends to the inside of the fresh water collection pipe 21 through the round hole, and the fresh water collection pipe 21 is connected to the drain The pipe 12 is connected; the drainage pipe 12 is preferentially made of aluminum pipe, the water collecting cloth 14 is gradually lowered from the four sides to the middle level, the fresh water collection pipe 21 is inclined from the middle to both sides, and the length of the water delivery strip 18 is different, and the length from the two sides to the middle is shorter. come shorter. The circulation pipeline 10 is provided with branch pipelines 40 inside the heating box 13, and the branch pipelines 40 are uniformly connected on the top of the circulation pipeline 10, and the circulation pipeline 10 and the branch pipeline 40 are preferably copper pipes. A filter screen 41 is also provided below the fresh water collecting pipe 21, and the material of the filter screen is nylon; the filter screen 41 is buckled inside the heating box 13 by fasteners.

The drainage pipe 12 is connected with the fresh water collecting tank 19, the water delivery pump 15 is installed on the heating box 13, and the water supply pipeline is connected between the water delivery pump 15 and the heating box 13, and the liquid level gauge 11 is installed on the said heating box 13, and the water delivery pump 15 is installed on the heating box 13. A signal transmission line is connected between the water pump 15 and the liquid level gauge 11 , and the outlet pipe 20 is connected below the fresh water collection tank 19 . It also includes a signal transmitter 16, and a signal line group is connected between the signal transmitter 16, the water transfer pump 15 and the liquid level gauge 11. The liquid level gauge 11 is an electronic liquid level gauge. In addition, a liquid level gauge is also provided on the fresh water collection tank 19 , and a signal transmission line is connected between the liquid level gauge and the signal transmitter 16 .

The heating box 13 is also connected with a gas pipe 42 , the gas outlet of the gas pipe 42 is connected with a steam turbine 48 , and the rotating shaft of the generator 49 is connected with the steam turbine 48 . The steam turbine 48 drives the generator 49 to generate electricity through the promotion of steam. The bottom of the steam turbine 48 is provided with a condenser 46. The water delivery pipe 45 is connected to one end of the condenser 46, and a water pump 3 44 is arranged on it. The other end of the condenser 46 is connected with a stagnant water discharge pipe 47. After the steam drives the steam turbine 48 to generate electricity, it enters the bottom of the steam turbine 48 and is condensed into water by the condenser 46, which is then discharged through the stagnant water discharge pipe 47. A power distribution cabinet 50 is installed on the side of the generator 49 , and a battery pack 51 is installed in the power distribution cabinet 50 , and the generator 49 and the power distribution cabinet 50 are connected with a power transmission line group. The battery pack 51 stores electrical energy for use by external electrical equipment.

The solar seawater desalination power generation device for ships disclosed by the present invention works like this. First, the seawater is delivered to the heating tank 13 through the water delivery pump 15. The water delivery pump 15 is a PLC-controlled motor, and the liquid level gauge 11 automatically detects the water level. And send information to the water transfer pump 15 at all times. At the same time, the heat-conducting oil is injected into the heat-collecting tube 5, and the parabolic mirror 6 concentrates the heat of the solar energy on the heat-conducting tube 5 to heat the heat-conducting oil. The heat-conducting oil can be heated up to 400 degrees Celsius. In the pipeline 10, the heat-conducting oil enters the heating box 13 to heat the seawater so that it boils to generate steam.

The steam moves upwards and condenses on the water collecting cloth 14 to form fresh water. Since the water collecting cloth 14 gradually decreases from the four sides to the middle level, the water flows to the lower place through the action of gravity, and the water flows along the water delivery bar 18 during the flow. Descending into the fresh water collection pipe 21 and then discharged into the drain pipe 12, the fresh water finally enters the fresh water collection tank 19 through the drain pipe 12 and gathers. If fresh water needs to be used, it can be discharged through the outlet pipe 20, and a manual gate is installed on the outlet pipe 20 , can control the size of the water.

Claims (1)

1. The solar seawater desalination power generation device for ships is characterized in that: it comprises a heat collecting frame (3), a heating box (13) and a fresh water collecting box (19), and parabolic mirrors are evenly distributed on the heat collecting frame (3) (6); the heat collecting tube (5) is installed on the parabolic mirror (6), and its two ends are connected with a liquid suction pump (1), and the quantity of the liquid suction pump (1) is 2, and there is a wear-through connection between the two Pass through the circulation pipeline (10) of described heating box (13); A water collecting cloth (14) is installed on the inner top of the heating box (13), and a fresh water collecting pipe (21) is installed below the described water collecting cloth (14). The fresh water collecting pipe (21) and the water collecting cloth (14) ) are uniformly connected with water delivery strips (18), the fresh water collection pipes (21) are evenly distributed with circular holes, and the drip ends of the water delivery strips (18) pass through the circular holes and extend to the fresh water collection pipes (21 ) inside, the fresh water collection pipe (21) is communicated with the drain pipe (12), and a filter screen (41) is also provided below the fresh water collection pipe (21), and the filter screen material is nylon; The drainpipe (12) is connected with the fresh water collecting tank (19), the water delivery pump (15) is installed on the heating box (13), and a water supply pipeline is connected between the water delivery pump (15) and the heating box (13), A liquid level gauge (11) is installed on the heating tank (13), a signal transmission line is connected between the water delivery pump (15) and the liquid level gauge (11), and the water outlet pipe (20) is connected under the fresh water collection tank (19) ; Described heating box (13) is also connected with gas pipeline (42), and described gas pipeline (42) outlet is connected with steam turbine (48), and the rotating shaft of generator (49) is connected with steam turbine (48), and described A power distribution cabinet (50) is installed on the side of the generator (49), the storage battery pack (51) is installed in the power distribution cabinet (50), and the generator (49) is connected with the power distribution cabinet (50) with a transmission line group.