CN113605494B - Solar regeneration adsorption type air water taking device and using method thereof - Google Patents
Solar regeneration adsorption type air water taking device and using method thereof Download PDFInfo
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- CN113605494B CN113605494B CN202110986378.3A CN202110986378A CN113605494B CN 113605494 B CN113605494 B CN 113605494B CN 202110986378 A CN202110986378 A CN 202110986378A CN 113605494 B CN113605494 B CN 113605494B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/28—Methods or installations for obtaining or collecting drinking water or tap water from humid air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
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Abstract
The invention discloses a solar regenerative adsorption type air water taking device, which comprises an induced draft unit, a cooling channel for heating a heat exchanger, an adsorbent packed bed unit and a condensing coil packaging shell of an air-cooled condensing unit which are sequentially connected, wherein the shell is a channel for air circulation; the heating channel of the heating heat exchanger is communicated with the solar heat collector to form a solar fluid circulation channel, a solid adsorbent material of silica sol solidified activated carbon fiber felt/lithium chloride + sodium acetate double salt is arranged inside the adsorbent packed bed unit, a condensing coil is arranged in a condensing coil packaging shell, and the refrigerating heat exchanger is communicated with the condensing coil to form an air cooling heat exchange fluid circulation channel. The one-time water taking cycle carried out by the invention comprises an adsorption stage and a regeneration stage, wherein in the adsorption stage, the solid adsorbent material adsorbs water vapor in the flowing air; in the regeneration stage, the hot dry air heated by the heating heat exchanger enables the moisture in the solid adsorbent material to be desorbed into hot humid air, and then the hot humid air flows through the condensing coil to be condensed to generate condensed water.
Description
Technical Field
The invention relates to the field of air water taking devices, in particular to a solar regeneration adsorption type air water taking device.
Background
Fresh water resources are one of the most important resources for maintaining vital signs of human bodies. However, the distribution of fresh water resources is not uniform all over the world, and some regions are in a state of serious water shortage all the year round, so that the development of regional economy and the improvement of the living standard of people are hindered. For some remote areas with underdeveloped economy and incomplete supporting facilities due to shortage of fresh water resources, islands with dispersed population and large mobility, deserts, pastures and other areas, or areas with multiple natural disasters such as frequent natural disasters and heavy post-disaster rescue and reconstruction work, a large-scale centralized water supply system is obviously uneconomical. On the basis of continuously promoting the construction of a large-scale water supply system, a small-scale decentralized water supply system is an effective way for solving the problem of water shortage in the area.
The air water taking device is an important component of a small-sized dispersed water supply system. Among them, the direct cooling type air water intake device has been widely used in military, industrial, commercial, and other fields, and has been highly effective. However, the water intake amount of the direct cooling type air water intake device is generally low, and the direct cooling type air water intake device has a remarkable water intake effect only under high-temperature and high-humidity conditions, and cannot realize water intake under a drought environment. The adsorption type air water taking system is an efficient water taking mode, and effectively improves the water vapor partial pressure of the treated air by utilizing the moisture absorbing and releasing characteristics of an adsorbent, so that the dew point temperature of the air is improved. It has been shown that compared with the condensation type, the adsorption type air water taking technology is not only suitable for arid regions, but also generally has lower energy consumption when used in regions other than tropical and subtropical coastal regions: extreme-effective bases and Design rules for Atmospheric Water generators with Nano-porous detectors (2021, 85.
At present, there are several patents of adsorption type air water intake device, such as: the invention patent of China is a solar adsorption type air water taking device with high water taking amount and backflow prevention (application number CN202011515559. X); chinese patent application No. CN 201610481248.3. However, the conventional adsorption type air water intake device has disadvantages such as low water intake per unit mass of adsorbent, long system adsorption/regeneration operation time (night adsorption, daytime regeneration), and large influence of day and night environment.
There is therefore a need for an adsorption type water intake from air device that improves upon the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a solar regeneration adsorption type air water taking device and a using method thereof, which are used for effectively improving the unit water taking amount of the adsorption type air water taking device, reducing the influence of environment temperature and humidity and are suitable for remote areas such as deserts, deserts and pastures.
In order to solve the technical problem, the invention provides a solar regenerative adsorption type air water taking device, which comprises an induced air unit, a solar heat collecting unit, an adsorbent packed bed unit, an air cooling condensing unit and a water storage unit, wherein the induced air unit is connected with the air cooling condensing unit; the solar heat collection unit comprises a solar heat collector and a heating heat exchanger, the heating heat exchanger comprises a heating channel and a cooling channel, the air-cooled condensation unit comprises a condensation coil pipe packaging shell, and a condensation coil pipe is arranged in the condensation coil pipe packaging shell;
the induced draft unit, the cooling channel of the heating heat exchanger, the adsorbent packed bed unit and the condensing coil packaging shell are sequentially connected to form a channel for air circulation; the heating channel of the heating heat exchanger is communicated with the solar heat collector and exchanges heat with air flowing through the cooling channel of the heating heat exchanger;
the interior of the adsorbent packed bed unit is filled with a solid adsorbent material;
and a water storage unit is arranged below the air-cooled condensing unit and is communicated with the inner cavity of the condensing coil packaging shell, and air flows through the condensing coil to be condensed to generate condensed water and is collected in the water storage unit.
The invention relates to an improvement of a solar regenerative adsorption type air water taking device, which comprises the following steps:
the induced air unit comprises an air pipe connecting piece, the air pipe connecting piece is in a box shape with two open ends, an air filter is arranged at the inlet end, and an induced draft fan is arranged in the middle of an inner cavity of the air pipe connecting piece.
The invention relates to a further improvement of a solar regenerative adsorption type air water taking device, which comprises the following components:
the solar heat collector is communicated with the heating channel of the heating heat exchanger through a hot water pipe and a hot water pump; the inlet end of the cooling channel of the heating heat exchanger is connected with the outlet end of the air pipe connecting piece, and the outlet end of the cooling channel of the heating heat exchanger is connected with the inlet end of the adsorbent packed bed unit.
The invention relates to a further improvement of a solar regenerative adsorption type air water taking device, which comprises the following components:
an inlet and an outlet are respectively arranged on two sides of the condensing coil pipe packaging shell, and a water outlet is arranged at the bottom of the condensing coil pipe packaging shell; outside the condensing coil packaging shell, a cooling fan and a refrigeration heat exchanger are fixedly connected with the condensing coil packaging shell through a heat exchanger supporting frame, the refrigeration heat exchanger is communicated with the condensing coil through a cold water pipe and a cold water pump, and the cooling fan is arranged above the refrigeration heat exchanger and clings to the cooling surface of the refrigeration heat exchanger.
The invention relates to a further improvement of a solar regenerative adsorption type air water taking device, which comprises the following steps:
the adsorbent packed bed unit comprises a divergent air pipe, an adsorbent packed bed shell and a convergent air pipe which are connected in sequence, one end of the adsorbent packed bed shell is connected with the outlet end of the cooling channel of the heating heat exchanger through the divergent air pipe, and the other end of the adsorbent packed bed shell is connected with the inlet of the condensing coil packaging shell through the convergent air pipe;
the solid adsorbent material is a silica sol solidified activated carbon fiber felt/lithium chloride and sodium acetate double-salt composite adsorbent, and the solid adsorbent material is in a strip shape and is stacked in sequence in a staggered mode.
The invention relates to a further improvement of a solar regenerative adsorption type air water taking device, which comprises the following components:
a water baffle is arranged at the outlet of the condensing coil pipe packaging shell;
the air pipe connecting piece is formed by connecting a first air pipe connecting piece and a second air pipe connecting piece end to end, and the first air pipe connecting piece and the second air pipe connecting piece are both box structures with two open ends;
the water storage unit comprises a water storage tank and an electric water taking device, and the top of the water storage tank is provided with an opening communicated with the water outlet.
The invention relates to a further improvement of a solar regenerative adsorption type air water taking device, which comprises the following steps:
the induced air unit, the heating heat exchanger, the adsorbent packed bed unit, the condensing coil pipe packaging shell and the water storage tank are arranged in the adsorption type air water taking device packaging shell to form a packaging body;
the solar heat collector, the hot water pump, the cooling fan, the refrigerating heat exchanger, the cold water pump, the heat exchanger support frame and the electric water taking device are arranged outside the packaging shell of the adsorption type air water taking device;
and the shell walls at two sides of the packaging shell of the adsorption type air water taking device are respectively provided with an opening which is respectively communicated with the inlet end of the air pipe connecting piece and the outlet of the condensing coil packaging shell.
The invention also provides a method for taking water by utilizing the solar regenerative adsorption type air water taking device (namely, a using method of the solar regenerative adsorption type air water taking device):
s1, the one-time water taking cycle comprises an adsorption stage and a regeneration stage, wherein the time of the adsorption stage is set to be 3-4 h, the time of the regeneration stage is set to be 1-2 h, and the water taking cycle is operated for 4-6 times 24 hours a day;
s2, an adsorption stage:
the induced draft fan drives the air in the device to flow, the outside air passes through the air filter, then passes through the air pipe connecting piece and the heating heat exchanger and enters the shell of the adsorbent packed bed, the solid adsorbent material absorbs the water vapor in the air, and the moisture content is reduced; after 3-4 h, the solid adsorbent material approaches to reach the state of adsorption saturation;
the air passing through the solid adsorbent material is directly exhausted to the outside through the condensing coil packaging shell;
s3, regeneration stage
After the adsorption stage is finished, the regeneration stage is started, and the induced draft fan, the solar heat collection unit and the air-cooled condensation unit are all electrified to work and comprise a moisture regeneration cycle, a hot water cycle and a condensation cycle which synchronously run;
s3.1, water regeneration cycle
The induced draft fan works to drive the outside air to continuously flow through the cooling channel of the heating heat exchanger and exchange heat with the hot water continuously passing through the heating channel of the heating heat exchanger, the air is heated by equal humidity to be changed into hot dry air which enters the shell of the adsorbent packed bed, and the hot dry air enables the moisture desorption of the solid adsorbent material to be changed into hot humid air; then the hot and wet air enters the condensing coil pipe packaging shell, is condensed into condensed water on the outer surface of the condensing coil pipe and drops, and enters the water storage tank from a water outlet;
the condensed air is discharged to the outside from an outlet of the condensing coil packaging shell;
s3.2, hot water circulation
The solar heat collector produces hot water by collecting solar radiant energy or by a built-in electric heating device;
the hot water pump continuously works to enable hot water to circularly flow, the hot water passes through the heating channel of the heating heat exchanger and exchanges heat with the air flowing through the cooling channel of the heating heat exchanger in the step S3.1, and the temperature of the hot water is reduced and returns to the solar heat collector to be continuously circularly heated;
s3.3, condensation cycle
The cooling fan continuously works to enable water in the refrigeration heat exchanger to perform forced convection heat exchange with external air, the temperature is reduced to form cooling water, the cooling water is conveyed into the condensing coil to perform heat exchange with hot and humid air flowing through the outer surface of the condensing coil in the step 3.1, the temperature of the cooling water after heat exchange is increased, and the cooling water returns to the refrigeration heat exchanger to continuously perform forced convection heat exchange with the external air to cool the cooling water into cooling water;
and S4, opening a switch of the electric water taking device, and discharging the condensed water collected in the step 3.1 to an external container.
Compared with the prior direct cooling type air water taking device and the prior adsorption type air water taking device, the invention has the following beneficial effects:
1. the solar regeneration adsorption type air water taking device heats and humidifies air at the regeneration stage, and then condenses to take water, so that the water vapor partial pressure of the air is greatly improved, and the device can obtain higher water taking amount compared with the existing air water taking device;
2. the solar regeneration adsorption type air water taking device also has water taking capacity in a drought environment, the water taking effect depends on the moisture absorption and release characteristics of the solid adsorbent material, water can be successfully taken as long as the solid adsorbent material can normally work, the restriction of environmental factors is broken, and the conventional air water taking device only shows ideal water taking capacity in a high-temperature high-humidity environment;
3. the operation mode of the solar regeneration adsorption type air water taking device is an adsorption-regeneration cycle which is operated for a plurality of times in one day, and the existing air water taking device is an operation mode of night adsorption and daytime regeneration, so that the solar regeneration adsorption type air water taking device has higher unit water taking amount and higher water taking efficiency than the existing air water taking device;
4. the solid adsorbent material adopts silica sol solidified activated carbon fiber felt/lithium chloride + sodium acetate double-salt composite adsorbent with high hygroscopicity and wide adsorption domain, and the operation mode is switched before the solid adsorbent material reaches adsorption balance; compared with some existing water taking devices from air by using composite adsorbent, the problem that the performance of the system is reduced due to the loss of the adsorbent caused by the overflow of solution after long-time adsorption is avoided;
5. the regeneration and dehumidification process of the adsorbent is usually carried out under a high-temperature condition, the solar energy is adopted to heat the air in the regeneration stage, the energy consumption of the system is saved, and compared with the mode of heating by commercial power or solar photovoltaic power generation in the conventional air water taking device, the solar photothermal conversion efficiency is generally higher than the photoelectric conversion efficiency.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of an external appearance of a solar regenerative adsorption type air water intake device according to the present invention;
FIG. 2 is a schematic diagram of the package housing of the desorption type air water intake device in FIG. 1;
FIG. 3 is a schematic structural diagram of the induced draft unit in FIG. 2;
FIG. 4 is a schematic view of the solar energy collection unit of FIG. 2;
FIG. 5 is a schematic cross-sectional view of the adsorbent packed bed unit of FIG. 2;
FIG. 6 is a schematic diagram of the structure of the air-cooled condensing unit of FIG. 2;
fig. 7 is a schematic structural diagram of the water storage unit in fig. 2.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:
the solid adsorbent material 16 used in the invention is a composite adsorbent of silica sol solidified activated carbon fiber felt/lithium chloride + sodium acetate double salt, and is prepared according to the invention of silica-activated carbon fiber felt-double salt composite desiccant and preparation method thereof with application number of 202110725018.8, and the concrete steps are as follows:
(1) Drying the activated carbon fiber felt in a 120 ℃ drying oven for 4 hours, taking out the activated carbon fiber felt, and cooling to room temperature to obtain a dried activated carbon fiber felt with the water content of less than or equal to 3%;
soaking the dried activated carbon fiber felt in an excessive silicon dioxide liquid with the concentration of 15wt.% for 2 hours; then taking out and placing in a 120 ℃ oven for drying for 4h;
description of the invention: the excess represents that after the impregnation time is reached, the silica liquid still remains in excess, i.e., the silica liquid is not completely absorbed by the dried activated carbon fiber mat.
(2) Preparing 30wt.% of lithium chloride aqueous solution and 26.6wt.% of sodium acetate aqueous solution respectively, and mixing the lithium chloride aqueous solution and the sodium acetate aqueous solution according to a set volume ratio (about 3; in the obtained mixed salt solution, the mass concentration of lithium chloride is 23 percent, and the mass concentration of sodium acetate is 6 percent; namely, lithium chloride: sodium acetate =3.8:1 in a concentration ratio;
and (2) dipping the dried activated carbon fiber felt obtained in the step (1) in an excessive mixed salt solution for 8 hours, taking out and putting in a 120 ℃ drying oven for drying for 4 hours to obtain the lithium chloride and sodium acetate double-salt modified silicon dioxide-activated carbon fiber felt (silicon dioxide-activated carbon fiber felt-double-salt composite drying agent).
Description of the drawings: the excess represents that the mixed salt solution still has the surplus after the dipping time is reached, namely, the mixed salt solution can not be completely absorbed by the dried activated carbon fiber felt.
The silica-activated carbon fiber felt-double salt composite desiccant is used as the solid adsorbent material 16 of the present invention.
The induced draft unit comprises an air filter 1, an induced draft fan 2 and an air pipe connecting piece 14, as shown in fig. 3, the air pipe connecting piece 14 comprises a first air pipe connecting piece 141 and a second air pipe connecting piece 142, the first air pipe connecting piece 141 and the second air pipe connecting piece 142 are both box structures with two open ends, and are mutually connected end to form the box-shaped air pipe connecting piece 14 with two open ends, the induced draft fan 2 is arranged in the middle of the air pipe connecting piece 14 and is fixedly connected with the air pipe connecting piece 14, and the induced draft fan 2 is used for driving air in the device to flow; the air filter 1 is disposed at an inlet end of the first air duct connector 141 and connected to the first air duct connector 141, and after air is sucked from the inlet end of the first air duct connector 141, the air firstly needs to be filtered by the air filter 1.
A solar heat collecting unit, as shown in fig. 4, including a heating heat exchanger 3, a solar heat collector 4, a hot water pipe 5 and a hot water pump 20; the heating heat exchanger 3 comprises a heating channel and a cooling channel, and the heating channel of the heating heat exchanger 3, the solar heat collector 4 and the hot water pump 20 are connected with each other through the hot water pipe 5, so that a closed server indication 'logic user in black list' is formed; the inlet end of the cooling channel of the heating heat exchanger 3 is connected with the outlet end of the second air pipe connector 142, and the outlet end of the cooling channel of the heating heat exchanger 3 is connected with the inlet of the adsorbent packed bed unit. When the system operates in a regeneration stage, hot water is produced in the solar heat collector 4, the hot water pump 20 continuously works, so that the hot water circularly flows in the solar fluid circulation channel and passes through the heating channel of the heating heat exchanger 3, meanwhile, the induced draft fan 2 continuously works to drive external air to flow through the cooling channel of the heating heat exchanger 3, heat exchange occurs, the air is heated into hot dry air, the hot dry air enters the adsorbent packed bed unit, and the temperature of the hot water is reduced and returns to the solar heat collector 4 to be continuously circularly heated. An electric heating device is built in the solar heat collector 4 to ensure that the device can continuously operate under the condition of no solar radiation.
The adsorbent packed bed unit, as shown in fig. 5, includes a divergent air duct 151, an adsorbent packed bed housing 6, and a convergent air duct 152 connected in sequence; one end of the adsorbent packed bed shell 6 is connected with the outlet end of the cooling channel of the heating heat exchanger 3 through a divergent air pipe 151, air enters the inner cavity of the adsorbent packed bed shell 6 through the divergent air pipe 151 after coming out of the cooling channel of the heating heat exchanger 3, the other end of the adsorbent packed bed shell 6 is connected with an air-cooled condensing unit through a convergent air pipe 152, and the air enters the air-cooled condensing unit through the convergent air pipe 152 from the inner cavity of the adsorbent packed bed shell 6; the solid adsorbent material 16 is filled in the adsorbent packed bed shell 6, the solid adsorbent material 16 is a composite adsorbent of silica sol cured activated carbon fiber felt/lithium chloride + sodium acetate double salt, compared with the existing adsorbent material, the adsorbent has high hygroscopicity and a wide adsorption domain, the solid adsorbent material 16 is in a strip shape, and the adsorbent packed bed shell 6 is sequentially stacked in a staggered manner, so that the adsorbent is fully contacted with the air and can absorb water vapor in humid air, and the solar regeneration adsorption type air water taking device can take water even in a low-humidity environment in arid regions such as deserts; because the adsorbent adopted by the invention can generate the overflow phenomenon after adsorbing for 4-5 h when the air humidity is more than 70% RH, in order to avoid the problem caused by the overflow, the adsorption time is set to be 3-4 h, the regeneration rate of the adsorbent is faster than the adsorption rate, the regeneration process can reach the balance within 1-2 h, and by utilizing the characteristic, the one-time complete water taking circulation stage is divided into two stages of the adsorption stage and the regeneration stage, the time of the adsorption stage is set to be 3-4 h, and the time of the regeneration stage is set to be 1-2 h. The hot dry air entering the adsorbent packed bed unit desorbs the moisture from the solid adsorbent material 16, and the hot dry air is humidified to become hot humid air. The hot humid air is then sent to an air-cooled condensing unit for condensation.
The air-cooled condensing unit, as shown in fig. 6, includes a condensing coil packaging casing 7, a cooling fan 8, a refrigeration heat exchanger 9, a heat exchanger support frame 10, a cold water pipe 11, a condensing coil 17, a water baffle 18 and a cold water pump 21. The front end and the rear end of the condensing coil packaging shell 7 are provided with openings, and the openings are respectively an inlet end and an outlet end of the condensing coil packaging shell 7 and are used as an air inlet and an air outlet; the bottom of the condensing coil packaging shell 7 is provided with an opening as a water outlet 71, and the rest are sealing structures; the outlet end of the reducing air pipe 152 is connected with the inlet end of the condensing coil packaging shell 7, the cooling fan 8 and the refrigeration heat exchanger 9 are fixedly connected with the condensing coil packaging shell 7 through the heat exchanger support frame 10 and are arranged above the condensing coil packaging shell 7, the condensing coil 17 is arranged inside the condensing coil packaging shell 7, and the water baffle 18 is arranged at the outlet end of the condensing coil packaging shell 7; the refrigeration heat exchanger 9 is a finned tube heat exchanger and is communicated with the condensing coil 17 through a cold water pipe 11 and a cold water pump 21, so that a closed air-cooled heat exchange fluid circulation channel is formed; the cooling fan 8 is arranged close to the cooling surface of the refrigeration heat exchanger 9, so that the water in the refrigeration heat exchanger 9 and the outside air can perform forced convection heat exchange to generate cooling water, and then the cooling water is conveyed into the condensing coil 17 through the cold water pipe 11; after the hot humid air of following the input of adsorbent packing bed unit gets into condensing coil package 7, be cooled off to its dew point temperature rapidly on condensing coil 17 surface, cause the vapor in the hot humid air to be condensed into liquid, the condensate liquid on condensing coil 17 surface is because the effect of gravity, drippage constantly and collected, because the lateral flow of air can make the liquid drop splash, install breakwater 18 additional after condensing coil 17 and be close to condensing coil package 7's exit end, make the condensate water effectively collected. The collected condensed water enters the water storage unit from the water outlet 71.
The water storage unit is arranged below the air-cooled condensing unit, as shown in fig. 7, and comprises a water storage tank 12 and an electric water collector 13, wherein the electric water collector 13 is communicated with the water storage tank 12, an opening is arranged at the top of the water storage tank 12 and is communicated with a water outlet 71 for receiving condensed water, the condensed water collected in the air-cooled condensing unit enters from the water outlet 71 under the action of gravity and air pressure difference and is collected in the water storage tank 12, and if the collected water is to be taken out, the water outlet of the electric water collector 13 can be timely discharged by pressing a switch on the electric water collector 13.
The air inducing unit, the heating heat exchanger 3 in the solar heat collecting unit, the adsorbent packed bed unit, the condensing coil packaging shell 7 in the air-cooled condensing unit and the water storage tank 12 in the water storage unit are packaged in the adsorption type air water taking device packaging shell 19 to form a packaging body, so that the purpose of better protecting the device is achieved, wherein the air inducing unit, the cooling channel of the heating heat exchanger 3 in the solar heat collecting unit, the adsorbent packed bed unit and the condensing coil packaging shell 7 in the air-cooled condensing unit are sequentially connected to form a channel for air circulation. The solar heat collector 4, the hot water pipe 5 and the hot water pump 20 in the solar heat collecting unit, and the cooling fan 8, the refrigeration heat exchanger 9, the cold water pump 21, the heat exchanger support frame 10 and the electric water intake device 13 in the air-cooled condensing unit are arranged outside the packaging shell 19 of the adsorption type air water intake device, and openings are respectively arranged on the shell walls at two sides of the packaging shell 19 of the adsorption type air water intake device, and are respectively communicated with the inlet end of the first air pipe connecting piece 141 and the outlet end of the condensing coil packaging shell 7 to be used as the inlet and outlet of a channel for air circulation. It should be noted that the above-mentioned connections are all hermetical connections to ensure the hermeticity of the solar fluid circulation channel, the air-cooled heat exchange fluid circulation channel and the air circulation channel.
The using method of the device comprises the following steps:
1. the one-time complete cycle phase of the device comprises an adsorption phase and a regeneration phase, wherein the time of the adsorption phase is set to be 3-4 h, the time of the regeneration phase is set to be 1-2 h, and the device can continuously work for 24 hours within one day and can run for 4-6 times of complete cycle phases;
2. an adsorption stage:
in the whole device, only the induced draft fan 2 is electrified to work, and the solar heat collection unit and the air-cooled condensation unit are not started to work, namely, the solar fluid circulation channel and the air-cooled heat exchange fluid circulation channel are not circularly worked;
the induced draft fan 2 drives the air in the device to flow, the outside air enters the adsorbent packed bed shell 6 of the adsorbent packed bed unit through the air pipe connecting piece 14 and the heating heat exchanger 3 after being filtered by the air filter 1, the air state parameters entering the adsorbent packed bed unit are the same as the outside air at the moment, and the solid adsorbent material 16 absorbs the water vapor in the air to reduce the moisture content of the air; after long-time adsorption, the moisture absorption of the solid adsorbent material 16 is gradually close to saturation, the time of the adsorption stage is set to be 3-4 h, and the solid adsorbent material 16 is controlled to be close to but not reach the state of adsorption saturation;
the air with reduced moisture content enters the condensing coil enclosure 7 through the outlet end of the tapered air duct 152 and is then discharged to the outside from the outlet end of the condensing coil enclosure 7, notably, water cannot be produced in this process;
3. regeneration stage
After the adsorption stage is finished, the regeneration stage is started, and the induced draft fan 2, the solar heat collection unit and the air-cooled condensation unit are all electrified to work;
3.1 Water regeneration cycle
The hot water pump 20 continuously works, so that the hot water produced in the solar heat collector 4 circularly flows and passes through the heating channel of the heating heat exchanger 3; meanwhile, the draught fan 2 works continuously to drive outside air to flow through a cooling channel of the heating heat exchanger 3, the air is heated by equal humidity to become hot dry air with high temperature and low humidity, the hot dry air enters an adsorbent packed bed shell 6 of the adsorbent packed bed unit, the hot dry air enables moisture of the solid adsorbent material 16 to be desorbed, and the hot dry air is humidified to become hot humid air; then, the hot and humid air enters the condensing coil packaging shell 7 and is rapidly cooled to the dew point temperature on the surface of the condensing coil 17, so that the water vapor in the hot and humid air is condensed into liquid, and the liquid condensed on the surface of the condensing coil 17 continuously drops and is collected as condensed water due to the action of gravity;
condensed water enters the water storage tank 12 of the water storage unit from the water outlet 71, and condensed air is discharged to the outside from the outlet end of the condensing coil packaging shell 7;
3.2 Hot Water circulation
The solar heat collector 4 collects solar radiation to produce hot water, the hot water pump 20 continuously works to enable the hot water produced in the solar heat collector 4 to circularly flow, the hot water is conveyed to a heating channel passing through the heating heat exchanger 3 to exchange heat with air passing through a cooling channel of the heating heat exchanger 3, and the temperature of the hot water is reduced and returns to the solar heat collector 4 to be continuously circularly heated;
when the outside is cloudy or at night and solar radiation cannot be converged to produce hot water, the solar heat collector 4 produces hot water through the built-in electric heating device so as to ensure that the device can continuously run under the condition of no solar radiation.
3.3 condensation cycle
The cooling fan 8 works continuously, so that the water in the refrigeration heat exchanger 9 and the outside air perform forced convection heat exchange, and the temperature is reduced to form cooling water; cooling water is conveyed into a condensing coil 17 through a cold water pipe 11 and exchanges heat with hot and humid air input from an adsorbent packed bed unit in a condensing coil packaging shell 7, water vapor in the hot and humid air is rapidly condensed into liquid on the surface of the condensing coil 17, the temperature of the cooling water after heat exchange is increased, and the cooling water returns to a refrigeration heat exchanger 9 through the cold water pipe 11 and continues to circularly exchange heat through a cooling fan 8;
it should be noted that steps 3.1, 3.2 and 3.3 are synchronized and cycled simultaneously during the regeneration phase.
4. If the condensed water collected in step 3.1 or the condensed water in the water storage tank 12 is full, the condensed water is discharged to the external container only by opening the switch on the electric water collector 13.
Finally, it is also noted that the above-mentioned list is only a few specific embodiments of the present invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (5)
1. The utility model provides a solar energy regeneration absorption formula air water intake device which characterized in that: the system comprises an induced draft unit, a solar heat collection unit, an adsorbent packed bed unit, an air cooling condensation unit and a water storage unit; the solar heat collection unit comprises a solar heat collector (4) and a heating heat exchanger (3), the heating heat exchanger (3) comprises a heating channel and a cooling channel, the air-cooled condensation unit comprises a condensation coil packaging shell (7), and a condensation coil (17) is arranged in the condensation coil packaging shell (7);
the induced air unit, a cooling channel of the heating heat exchanger (3), the adsorbent packed bed unit and the condensing coil packaging shell (7) are sequentially connected into a channel for air circulation; the heating channel of the heating heat exchanger (3) is communicated with the solar heat collector (4) and exchanges heat with air flowing through the cooling channel of the heating heat exchanger (3);
the interior of the adsorbent packed bed unit is filled with a solid adsorbent material (16);
a water storage unit is arranged below the air-cooled condensing unit and is communicated with the inner cavity of the condensing coil packaging shell (7), and air flows through a condensing coil (17) to be condensed to generate condensed water and is collected in the water storage unit;
the induced air unit comprises an air pipe connecting piece (14), the air pipe connecting piece (14) is in a box shape with two open ends, an air filter (1) is arranged at the inlet end, and an induced draft fan (2) is arranged in the middle of an inner cavity of the air pipe connecting piece (14);
the solar heat collector (4) is communicated with a heating channel of the heating heat exchanger (3) through a hot water pipe (5) and a hot water pump (20); the inlet end of a cooling channel of the heating heat exchanger (3) is connected with the outlet end of the air pipe connecting piece (14), and the outlet end of the cooling channel of the heating heat exchanger (3) is connected with the inlet end of the adsorbent packed bed unit;
an inlet and an outlet are respectively arranged on two sides of the condensing coil packaging shell (7), and a water outlet (71) is arranged at the bottom of the condensing coil packaging shell; outside of condenser coil encapsulation shell (7), cooling fan (8), refrigeration heat exchanger (9) pass through heat exchanger support frame (10) and condenser coil encapsulation shell (7) fixed connection, refrigeration heat exchanger (9) pass through cold water pipe (11), cold water pump (21) with condenser coil (17) are linked together, and cooling fan (8) are located refrigeration heat exchanger (9) top and are hugged closely the cooling surface setting of refrigeration heat exchanger (9).
2. The solar regenerative absorption type air water taking device according to claim 1, wherein:
the adsorbent packed bed unit comprises a divergent air pipe (151), an adsorbent packed bed shell (6) and a convergent air pipe (152) which are sequentially connected, one end of the adsorbent packed bed shell (6) is connected with the outlet end of a cooling channel of the heating heat exchanger (3) through the divergent air pipe (151), and the other end of the adsorbent packed bed shell is connected with the inlet of the condensing coil pipe packaging shell (7) through the convergent air pipe (152);
the solid adsorbent material (16) is a silica sol solidified activated carbon fiber felt/lithium chloride + sodium acetate double-salt composite adsorbent, and the solid adsorbent material (16) is strip-shaped and is sequentially stacked in a staggered mode.
3. The solar regenerative absorption type air water taking device according to claim 2, wherein:
a water baffle (18) is arranged at the outlet of the condensing coil packaging shell (7);
the air pipe connecting piece (14) is formed by connecting a first air pipe connecting piece (141) and a second air pipe connecting piece (142) end to end, and the first air pipe connecting piece (141) and the second air pipe connecting piece (142) are both box structures with openings at two ends;
the water storage unit comprises a water storage tank (12) and an electric water taking device (13), and the top of the water storage tank (12) is provided with an opening communicated with the water outlet (71).
4. The solar regenerative absorption type air water taking device according to claim 3, wherein:
the induced air unit, the heating heat exchanger (3), the adsorbent packed bed unit, the condensing coil pipe packaging shell (7) and the water storage tank (12) are arranged in the adsorption type air water taking device packaging shell (19) to form a packaging body;
the solar heat collector (4), the hot water pump (20), the heat dissipation fan (8), the refrigeration heat exchanger (9), the cold water pump (21), the heat exchanger support frame (10) and the electric water taking device (13) are arranged outside the packaging shell (19) of the adsorption type air water taking device;
and the shell walls at two sides of the adsorption type air water taking device packaging shell (19) are respectively provided with an opening which is respectively communicated with the inlet end of the air pipe connecting piece (14) and the outlet of the condensing coil packaging shell (7).
5. The use method of the solar regenerative adsorption type air water taking device according to any one of claims 1 to 4, wherein:
s1, the one-time water taking cycle comprises an adsorption stage and a regeneration stage, wherein the time of the adsorption stage is set to be 3-4 h, the time of the regeneration stage is set to be 1-2 h, and the water taking cycle is operated for 4-6 times in 24 hours a day;
s2, an adsorption stage:
the induced draft fan (2) drives the air in the device to flow, the outside air enters the adsorbent packed bed shell (6) through the air filter (1), the air pipe connecting piece (14) and the heating heat exchanger (3), the solid adsorbent material (16) absorbs the water vapor in the air, and the moisture content is reduced; after 3-4 h, the solid adsorbent material (16) approaches to reach the state of adsorption saturation;
the air passing through the solid adsorbent material (16) is directly exhausted to the outside through the condensing coil packaging shell (7);
s3, regeneration stage
After the adsorption stage is finished, the regeneration stage is started, and the induced draft fan (2), the solar heat collection unit and the air-cooled condensation unit are all electrified to work and comprise a moisture regeneration cycle, a hot water cycle and a condensation cycle which run synchronously;
s3.1, water regeneration cycle
The induced draft fan (2) works to drive the external air to continuously flow through the cooling channel of the heating heat exchanger (3) and exchange heat with hot water continuously passing through the heating channel of the heating heat exchanger (3), the air is heated by equal humidity to become hot dry air which enters the shell (6) of the adsorbent packed bed, and the hot dry air enables the moisture desorption of the solid adsorbent material (16) to become hot humid air; then the hot and humid air enters the condensing coil packaging shell (7), is condensed into condensed water on the outer surface of the condensing coil (17) and drops, and enters the water storage tank (12) from a water outlet (71);
the condensed air is discharged to the outside from an outlet of the condensing coil packaging shell (7);
s3.2, hot water circulation
The solar heat collector (4) is used for producing hot water by collecting solar radiant energy or by a built-in electric heating device;
the hot water pump (20) continuously works to enable hot water to circularly flow, the hot water passes through the heating channel of the heating heat exchanger (3) and exchanges heat with the air flowing through the cooling channel of the heating heat exchanger (3) in the step S3.1, and the temperature of the hot water is reduced and returns to the solar heat collector (4) to be continuously circularly heated;
s3.3, condensation cycle
The heat dissipation fan (8) works continuously, so that water in the refrigeration heat exchanger (9) and outside air perform forced convection heat exchange, the temperature is reduced to be cooling water which is conveyed into the condensing coil (17) and performs heat exchange with hot and humid air flowing through the outer surface of the condensing coil (17) in the step 3.1, the temperature of the cooling water after heat exchange is increased, and the cooling water returns to the refrigeration heat exchanger (9) to continue to perform forced convection heat exchange with the outside air and is cooled to be cooling water;
and S4, opening a switch of the electric water taking device (13), and discharging the condensed water collected in the step 3.1 to an external container.
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| CN106013330B (en) * | 2016-06-27 | 2019-06-21 | 上海交通大学 | Air water-intaking system |
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