CN112591833A

CN112591833A - Local heating type seawater desalination device with multiple energy mechanisms

Info

Publication number: CN112591833A
Application number: CN202011376154.2A
Authority: CN
Inventors: 钱伟; 吴华伟; 吴钊; 李正; 雷宇
Original assignee: Hubei University of Arts and Science
Current assignee: Hubei University of Arts and Science
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-02

Abstract

The invention discloses a local heating type seawater desalination device with multiple energy mechanisms, which comprises a main body, a heating device and a power generation device, wherein the heating device is arranged on the main body; a first accommodating cavity for collecting seawater and a second accommodating cavity for collecting fresh water are formed in the main body, and the first accommodating cavity is communicated with the second accommodating cavity through a condensing pipe; the heating device comprises a heating element which is arranged in the first accommodating cavity and used for heating the seawater in the first accommodating cavity, so that the seawater is gasified into steam and then is liquefied into fresh water through the condensing pipe and flows into the second accommodating cavity; the power generation device comprises an energy storage battery, and the energy storage battery is electrically connected with the heating member. The evaporation is effectively carried out under the condition of low power density, the power requirement on a power supply is reduced, and the multi-stage utilization of the energy of the whole device and the self-supply of the energy in a complete working period are realized; and minimizing energy cost, controlling energy use and realizing energy circulation and high efficiency.

Description

Local heating type seawater desalination device with multiple energy mechanisms

Technical Field

The invention relates to the technical field of glue supply instruments, in particular to a local heating type seawater desalination device with multiple energy mechanisms.

Background

The traditional seawater desalination technology can be roughly divided into two types in operation principle: the hot method and the membrane method, the hot method seawater desalination technology utilizes heat energy to drive seawater brackish water to generate phase change, and finally realizes the separation of brine, mainly comprising the following steps: multi-stage flash distillation (MSF), multi-effect distillation (MED) and vapor compression distillation (VC); the membrane method seawater desalination technology has no phase change in the operation process, and is a seawater desalination method which depends on selectively permeable water or salt of a microporous membrane with selective permeability and intercepts another component, and mainly comprises the following steps: reverse Osmosis (RO), Electrodialysis (ED) and Membrane Distillation (MD) techniques. With the continuous innovation and improvement of the seawater desalination technology, the seawater desalination has been developed into a reliable industrial technology. Although the seawater desalination technology is mature at present and is gradually popularized and used, in the operation process, the technology consumes a large amount of fossil energy, namely a mode of changing water by oil, relieves the problem of shortage of fresh water resources to a certain extent, but accelerates the exhaustion speed of the fossil energy. Moreover, the combustion of fossil energy also causes a very serious problem of environmental pollution. Compared with the traditional fossil energy, the solar energy has the advantages of inexhaustibility and no secondary pollution in the using process, so that the clean and renewable solar energy is selected to replace the fossil energy to supply energy to the seawater desalination device, and the solar energy and the method become one of important means for solving the problems of fresh water resource shortage and energy consumption and pollution. In the existing solar seawater desalination technology, two energy utilization modes of solar energy are provided, one mode is that the solar energy is subjected to photoelectric conversion and then provides driving force for a membrane permeation system to realize a seawater dialysis process, namely, the solar membrane seawater desalination technology; the second is that the heat energy of solar energy is used to directly supply heat to the seawater to make it change phase, thus realizing the separation of salt and water, namely the seawater desalination technology by solar energy heat method.

Disclosure of Invention

The invention mainly aims to provide a local heating type seawater desalination device with a multi-energy mechanism, and aims to solve the technical problems of energy consumption and pollution in the seawater desalination process in the prior art.

In order to achieve the above object, the present invention provides a local heating type seawater desalination apparatus with multiple energy mechanisms, comprising:

the seawater desalination device comprises a main body, a seawater collecting device and a fresh water collecting device, wherein a first accommodating cavity and a second accommodating cavity are formed in the main body, the first accommodating cavity is used for collecting seawater, the second accommodating cavity is used for collecting fresh water, and the first accommodating cavity is communicated with the second accommodating cavity through a condensation pipe;

the heating device comprises a heating element, the heating element is arranged in the first accommodating cavity and used for heating the seawater in the first accommodating cavity, so that the seawater is gasified into steam and then is liquefied into fresh water through the condensing pipe and flows into the second accommodating cavity; and the number of the first and second groups,

and the power supply device comprises an energy storage battery, and the energy storage battery is electrically connected with the heating member.

Optionally, heating device still includes the base, the base is used for floating the first sea water surface that holds the intracavity, the upper end of base is equipped with the mounting groove, the tank bottom of mounting groove is equipped with the intercommunication first a plurality of slot holes that hold the chamber, the mounting groove is used for the installation the heating member.

Optionally, the local heating type seawater desalination device with multiple energy mechanisms further comprises a guide structure arranged in the first accommodating cavity, the guide structure comprises a guide rod extending in the vertical direction, and the base is provided with a through hole in sliding connection and matching with the guide rod in the vertical direction.

Optionally, the heating member is the electrothermal tube, the local heating type sea water desalination device of many energy mechanisms still includes a plurality of supports, a plurality of supports are located in the installing zone, each be formed with a joint groove on the support, the joint groove is used for the joint the electrothermal tube.

Optionally, the base is made of polystyrene resin.

Optionally, the power supply device further includes a solar power supply assembly, and the solar power supply assembly is electrically connected to the energy storage battery.

Optionally, the power supply device further comprises a seal box, a temperature difference power supply sheet and a copper sheet, the seal box is mounted on the side wall of the first accommodating cavity, a mounting cavity for mounting the temperature difference power supply sheet is formed inside the seal box, the copper sheet is arranged on one side of the mounting cavity, the temperature difference power supply sheet comprises a hot end and a cold end, the hot end is abutted against the condensation pipe, and the cold end is abutted against the copper sheet so as to generate current when temperature difference exists between the hot end and the cold end;

the temperature difference power supply sheet is electrically connected with the energy storage battery.

Optionally, the locally heated seawater desalination plant of the multi-energy mechanism further comprises:

the water pump is arranged outside the first accommodating cavity and used for pumping seawater to be supplemented into the first accommodating cavity;

the water level sensor is arranged in the first accommodating cavity and used for triggering an induction signal when sensing the change of the seawater level in the first accommodating cavity; and the number of the first and second groups,

and the control circuit is electrically connected with the water level sensor and the water pump so as to control the water pump to work when the sensing signal is received.

Optionally, the locally heated seawater desalination plant with a multi-energy mechanism further comprises a water collection tank and a drain pipe, wherein the water collection tank extends around the wall of the first accommodating cavity and is used for collecting wall-attached water drops;

one end of the drain pipe is communicated with the water collecting tank, the other end of the drain pipe extends out of the first accommodating cavity and is used for discharging water in the water collecting tank, and two ends of the drain pipe are bent oppositely, so that the middle of the drain pipe is sunken downwards to form a liquid sealing section.

Optionally, the first accommodating cavity is open, the local-heating seawater desalination device with a multi-energy mechanism further comprises a cover plate and heat preservation cotton, and the cover plate is arranged at the top of the first accommodating cavity and used for covering the first accommodating cavity;

the heat preservation cotton is laid on one side of the cover plate in the first accommodating cavity.

In the technical scheme provided by the invention, the self-contained power supply device can provide energy for the distillation of the whole seawater, and the problems of energy consumption and pollution are effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a local-heating seawater desalination plant with a multi-energy mechanism according to the present invention;

FIG. 2 is a schematic diagram of the internal structure of the local-heating seawater desalination plant of the multi-energy mechanism in FIG. 1;

FIG. 3 is a schematic structural view of the base of FIG. 1;

FIG. 4 is a schematic structural view of the main body of FIG. 1;

fig. 5 is a cross-sectional view taken at D-D in fig. 4.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Local heating type sea water desalting device with multiple energy mechanisms	109	Drain pipe
101	First accommodating cavity	110	Cover plate
				102	Second containing cavity	111	Slotted hole
103	Condenser tube	112	Clamping groove
				104	Energy storage battery	113	Water collecting tank
105	Base seat	114	Heat insulation cotton
				106	Electric heating tube
107	Solar power supply assembly
				108	Water pump

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. Also, the technical solutions in the embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.

In view of the above, the present invention provides a local heating type seawater desalination device with multiple energy mechanisms, which aims to solve the technical problems of energy consumption and pollution in the seawater desalination process in the prior art. Fig. 1 to 5 show an embodiment of a local-thermal seawater desalination plant with multiple energy mechanisms according to the present invention.

Referring to fig. 1, the present embodiment provides a local-heating seawater desalination apparatus 100 with multiple energy mechanisms, including:

a main body, in which a first containing cavity 101 for collecting seawater and a second containing cavity 102 for collecting fresh water are formed, wherein the first containing cavity 101 and the second containing cavity 102 are communicated through a condensing pipe 103;

the heating device comprises a heating element, the heating element is arranged in the first accommodating cavity 101 and is used for heating the seawater in the first accommodating cavity 101, so that the seawater is gasified into vapor and then is liquefied into fresh water through the condensing pipe 103 and flows into the second accommodating cavity 102; and the number of the first and second groups,

the power supply device comprises an energy storage battery 104, and the energy storage battery 104 is electrically connected with the heating body.

In the technical scheme provided by this embodiment, there are two independent water tanks, a first accommodating chamber 101 and a second accommodating chamber 102 are formed in the two water tanks, respectively, the first accommodating chamber 101 is used for accommodating seawater to be desalinated, and the second accommodating chamber 102 is used for accommodating processed fresh water. The heating device comprises a heating element for heating seawater, and the heating element can be in various forms, such as a heating pipe or a resistance wire. The seawater is heated by the heating element to become a gas state, the gas state is transmitted into the second containing cavity 102 through the condensing pipe 103, and is liquefied into water in the transmission process, the water is fresh water without salt, and the fresh water flows into the second containing cavity 102 through the condensing pipe 103 to be collected. The power supply device is used for supplying power, an energy storage battery 104 is arranged in the power supply device for storing the generated electricity, and the energy storage battery 104 is also electrically connected with the heating element for supplying electric energy. The self-contained power supply device can provide energy for the distillation of the whole seawater, and the problems of energy consumption and pollution are effectively solved. The evaporation is effectively carried out under the condition of low power density, the power requirement on a power supply is reduced, and the multi-stage utilization of the energy of the whole device and the self-supply of the energy in a complete working period are realized; and minimizing energy cost, controlling energy use and realizing energy circulation and high efficiency.

Further, referring to fig. 2, in this embodiment, the heating device further includes a base 105, the base 105 floats on the surface of the seawater in the first accommodating chamber 101, the upper end surface of the base 105 is recessed downward to form a rectangular installation groove, a groove hole 111 is formed at the bottom of the installation groove, the groove hole 111 is used for the seawater to enter the installation groove, and a heating element is arranged in the installation groove to heat the seawater in the installation groove and gasify the seawater. The local heating method is adopted, so that the requirement on energy power is effectively reduced.

Further, in this embodiment, in order to prevent the base 105 from drifting anywhere on the surface of the seawater in the first accommodation chamber 101, a guide structure is provided. The guide structure includes a plurality of guide rods, each of which is extended upward along the bottom of the first receiving chamber 101. Each guide rod has the same length and size, and the length is greater than half of the depth of the first accommodating cavity 101 but less than the depth of the first accommodating cavity 101. The number of the guide rods is four, and the four guide rods are arranged in a rectangular shape, but the guide rods are not limited to the rectangular shape and can also be arranged in a straight line shape. Four through holes corresponding to the guide rods are formed in the base 105, and the four through holes penetrate through the base 105 in the vertical direction. When the seawater in the first accommodation chamber 101 descends, the base 105 moves downward along the guide bar, and when the seawater in the first accommodation chamber 101 ascends, the base 105 moves upward along the guide bar.

Further, in this embodiment, the heating element is an electrical heating tube 106, which has good insulation property, so as to avoid the problem that the heating element is expanded, falls down and touches the bottom due to the large distance of the wire. The local heating type seawater desalination device 100 with multiple energy mechanisms further comprises a plurality of supports, the supports are arranged in the installation area, each support is provided with a clamping groove 112, and the clamping grooves are used for clamping the electric heating tubes 106, so that the electric heating tubes 106 can be better fixed.

Further, in the present embodiment, the base 105 is made of polystyrene resin.

Further, in this embodiment, the power supply device further includes a solar power supply module 107, and the solar power supply module 107 is electrically connected to the energy storage battery 104. The solar power supply module 107 converts the absorbed solar energy into electric energy, the electric energy is converted into photovoltaic direct current through the DC/DC converter, under the distribution management of the PLC control device, a part of the electric energy supplies power to the electric heating pipe 106, and the electric heating pipe 106 heats the evaporation water body to be converted into water vapor. The redundant electric energy is charged and stored in the energy storage battery 104 under the distribution management of the PLC control device. When the solar power supply module 107 cannot generate the required electric quantity for meeting the system operation in severe weather conditions, the energy storage battery 104 is used as an energy source.

Further, in this embodiment, the power supply device further includes a seal box, a temperature difference power supply sheet and a copper sheet, the seal box is installed on the side wall of the first accommodating cavity 101, an installation cavity for installing the temperature difference power supply sheet is formed inside the seal box, the copper sheet is arranged on one side of the installation cavity, the temperature difference power supply sheet includes a hot end and a cold end, the hot end is in butt joint with the condensation pipe 103, and the cold end is in butt joint with the copper sheet so as to generate current when the hot end and the cold end have temperature difference. The inner wall of the installation cavity is symmetrically distributed with 18 SP1848-27145SA type temperature difference power supply sheets which are connected in parallel, the temperature difference power supply combination mode is that six blocks which are symmetrically arranged on the same horizontal plane are connected in series to form a group, the last three layers are connected in parallel to output, and the maximum output voltage after the preliminary trial run is 12V. The cold end contacts with the copper sheet, and condenser pipe 103 is hugged closely to the hot junction, and when high-temperature steam got into the condensation power supply section via funnel type steam collector, high-temperature steam passed through condenser pipe 103 and transmitted heat for difference in temperature power supply piece hot junction, and the cold end passes through the copper sheet and contacts with lower floor's sea water, produces the electric current, stores in the power battery. Clean energy is provided for seawater desalination, energy waste is avoided, and efficient circulation of energy is realized. The power requirement on the power supply is reduced, and the multi-stage utilization of the energy of the whole device and the self-supply of the energy in the complete working period are realized.

Further, in this embodiment, the local heating type seawater desalination apparatus 100 of the multi-energy mechanism further includes a water filling device, where the water filling device includes a water pump 108, a water level sensor, and a control circuit; the water pump 108 is arranged outside the first accommodating cavity 101 and used for pumping seawater to be supplemented into the first accommodating cavity 101; the water level sensor is arranged in the first accommodating cavity 101 and used for triggering a sensing signal when sensing that the seawater level in the first accommodating cavity 101 changes; the control circuit is electrically connected to the water level sensor and the water pump 108, so as to control the water pump 108 to work when the sensing signal is received. When the water level drops to the lower critical value, the water pump 108 is controlled to feed water, and after the water level reaches the upper critical value, the water pump 108 is stopped to feed water. The device completes a cycle of work. The working principle of the control circuit, the water level sensor and the water pump 108 is the prior art and is not described herein again.

Further, in this embodiment, the local heating type seawater desalination apparatus 100 with multiple energy mechanisms further includes a water collection device, where the water collection device includes a water collection tank 113 and a water discharge pipe 109, and the water collection tank 113 extends around the cavity wall of the first accommodating cavity 101 to collect wall-attached water droplets; the problem that the desalted water flows into the first accommodating cavity 101 again to cause waste is avoided. One end of the drain pipe 109 is communicated with the water collecting tank, the other end of the drain pipe extends out of the first accommodating cavity 101, extends into the second water collecting tank to discharge water in the water collecting tank 113, and two ends of the drain pipe 109 are bent oppositely, so that the middle of the drain pipe 109 is sunken downwards to form a liquid sealing section. The liquid seal section is the U type setting, and the inside is equipped with water, plays the effect of liquid seal drain pipe 109, avoids first chamber 101 and external intercommunication that holds, causes the gas outflow.

Further, in this embodiment, the first accommodating cavity 101 is open, the local-heating seawater desalination device 100 of the multi-energy mechanism further includes a cover plate 110 and heat insulation cotton 114, the cover plate 110 is disposed on the top of the first accommodating cavity 101, and is used for covering the first accommodating cavity 101; the heat preservation cotton is laid on one side of the cover plate 110 in the first accommodating cavity 101. In addition, a sealing ring is provided at the cover plate 110, which can seal the first receiving chamber 101 well. The upper end surface of the cover plate 110 is also provided with a handle.

It should be noted that the local-heating seawater desalination apparatus 100 with multiple energy mechanisms further includes an air suction pump, which performs an exhaust treatment in the first accommodating chamber 101 in advance to generate a low-pressure state with a pressure relative to the external air pressure, and the low-pressure state will reduce the boiling point of seawater in the container, so that a good evaporation effect can be achieved in the temperature rise heat lower than that under normal conditions. As the vapor is steadily generated, the getter pump will self-regulate with the vapor generation rate in order to continue to maintain a constant low pressure state in the first receiving chamber 101.

The invention discloses a local heating type seawater desalination device 100 with a multi-energy mechanism, which comprises a main body, a heating device, a multi-effect condensing device, a power supply device, a water collecting device and a water filling device, wherein the heating device is arranged on the main body; a first accommodating cavity 101 for accommodating and collecting seawater and an installation groove for heating seawater and collecting fresh water are formed in the main body, and the first accommodating cavity 101 is communicated with the installation groove through a groove-shaped hole 111; the heating device comprises a heating element which is arranged in the second installation groove and used for heating seawater in the installation groove, so that the seawater is gasified into vapor by absorbing heat and then is liquefied into fresh water by the multiple-effect condensing device pipe and flows into the first water collector, the mode can ensure effective evaporation under the condition of low power density, the power requirement on a power supply is reduced, and the feasibility of small-area photovoltaic power supply is enhanced; the multi-effect condensing device comprises a negative pressure air suction pump, a thermoelectric condensing structure and a condensing pipe, can realize instant capture of generated steam and liquefaction and discharge, and realizes more complete heat exchange and a heat-electricity conversion process due to the multi-effect condensation in the process; the power supply device comprises a solar power supply assembly and an energy storage battery, wherein the solar power supply assembly and the energy storage battery are electrically connected with the heating element. The water collecting device includes a first water collector and a second water collector, the second accommodating chamber 102 is formed inside the first water collector, the first water collector collects the liquefied water discharged from the multi-effect condensing device, and the second water collector (i.e., the second accommodating chamber 102) collects the liquefied water discharged from the coanda water collecting tank. Add the water injection device, the sea water in the self priming water pump 108 absorption tank body by level sensor control transports the replenishment that carries out timely sea water to first holding chamber 101 in through the pipeline, makes the sea water highly maintain comparatively stable horizontal height at the mounting groove in the continuous evaporation process cavity, guarantees that upper steam space size is unchangeable basically, and the device operation is reliable and stable. The evaporation is effectively carried out under the condition of low power density, the power requirement on a power supply is reduced, the multi-stage utilization of energy and the multi-path recovery of products are further enhanced under the condition that the realization of basic functions is guaranteed by the whole device, and the energy self-supply strategy only depending on photovoltaic power generation in a complete working period is realized; deep excavation, minimization of energy cost, controllability of energy use and high efficiency of energy circulation.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A local heating type seawater desalination device with a multi-energy mechanism is characterized by comprising:

2. The local thermal seawater desalination apparatus of claim 1, wherein the heating apparatus further comprises a base for floating on the surface of seawater in the first accommodating chamber, the base is provided with a mounting groove at an upper end thereof, the bottom of the mounting groove is provided with a plurality of groove-shaped holes communicating with the first accommodating chamber, and the mounting groove is used for mounting the heating element.

3. The locally heated seawater desalination plant of claim 2, wherein the locally heated seawater desalination plant of multi-energy mechanism further comprises a guiding structure disposed in the first accommodating chamber, the guiding structure comprises a guiding rod extending in an up-down direction, and the base is provided with a through hole in an up-down direction, the through hole being slidably coupled with the guiding rod.

4. The locally heated seawater desalination plant of claim 2, wherein the heating element is an electrical heating tube, and further comprising a plurality of supports, the plurality of supports are disposed in the mounting region, and each support has a clamping groove formed thereon for clamping the electrical heating tube.

5. The local thermal seawater desalination apparatus of claim 2, wherein the base is made of polystyrene resin.

6. The multi-energy mechanism local thermal seawater desalination plant of claim 1, wherein the power supply further comprises a solar power supply assembly, wherein the solar power supply assembly is electrically connected to the energy storage battery.

7. The local-heating seawater desalination plant with multiple energy mechanisms as claimed in claim 1, wherein the power supply device further comprises a sealing box, a thermoelectric power supply sheet and a copper sheet, the sealing box is installed on the side wall of the first accommodating chamber, an installation chamber for installing the thermoelectric power supply sheet is formed inside the sealing box, the copper sheet is arranged on one side of the installation chamber, the thermoelectric power supply sheet comprises a hot end and a cold end, the hot end abuts against the condensation pipe, and the cold end abuts against the copper sheet to generate current when there is a temperature difference between the hot end and the cold end;

8. The locally-heated seawater desalination plant of claim 1, wherein the locally-heated seawater desalination plant of a multi-energy mechanism further comprises:

9. The locally heated seawater desalination plant of claim 1 wherein the locally heated seawater desalination plant of the multi-energy mechanism further comprises a water collection tank, a drain, the water collection tank extending around the wall of the first containment chamber for collecting mural droplets;

10. The locally-heated seawater desalination plant of claim 1, wherein the first accommodating chamber is open, and further comprises a cover plate and heat-insulating cotton, wherein the cover plate is disposed on the top of the first accommodating chamber and used for covering the first accommodating chamber;