CN113041779A - Constant-temperature compact cross-flow type solid adsorption dehumidification method and dehumidification bed - Google Patents
Constant-temperature compact cross-flow type solid adsorption dehumidification method and dehumidification bed Download PDFInfo
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Abstract
The invention discloses a constant-temperature compact cross-flow plate type heat exchange solid adsorption dehumidification method, which comprises the following steps: (1) arranging a constant-temperature compact cross-flow type solid adsorption dehumidification bed; (2) an adsorption dehumidification process; (3) a desorption regeneration process; (4) and (4) repeating the steps (2) to (3) until the air dehumidification operation is finished. The invention also provides a dehumidification bed for implementing the method, which comprises a cubic metal shell, plates, corrugated metal heat conduction fins and a longitudinally-through air dehumidification channel layer; the air constant temperature channel layer is transversely penetrated; a porous solid adsorption particle material layer is arranged on the surface of the metal heat conduction fin in the air dehumidification channel layer; the dehumidification channel layer and the constant temperature channel layer are arranged in a multi-layer mode in an alternating mode and are arranged up and down; the channel layers are mutually sealed. The invention integrates dehumidification and heat exchange into one device, has compact structure and high dehumidification efficiency, can effectively utilize low-grade waste heat, is green and pollution-free, and is energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of industrial refrigeration and heat energy utilization, and particularly relates to a constant-temperature compact cross-flow type solid adsorption dehumidification method and a dehumidification bed.
Background
At present, in some processing technological processes of industries such as heating ventilation, electric power, medicine production, food processing and the like, dry air is often used for heat exchange, drying and other operations. However, the current commercialized air dehumidifying device is relatively expensive, and particularly, the small-sized dehumidifying device generally adopts absorption refrigeration, so that a special cooling tower is required, the investment is high, the equipment is complex, the occupied space is large, and water is wasted; the existing liquid dehumidifier unit has high regeneration temperature and corrosiveness, and the equipment is also complex and expensive. Both of the above-mentioned dehumidification plants are uneconomical and uneconomical for users of small enterprises and the like.
In addition, the air temperature and humidity are closely related to the comfort of the human body, and the air temperature is too high or too low, which causes discomfort to the human body. Air dehumidification operation is also frequently required in civil and commercial ventilation systems and industrial ventilation systems, but the adopted air dehumidification equipment consumes a large amount of electric energy, has high operation cost, and is not energy-saving and environment-friendly.
The cross-flow type plate heat exchanger in the prior art adopts a high-quality hydrophilic aluminum foil/epoxy resin aluminum foil material, and two paths of air flow in a cross way, so that the air in the two paths can be completely separated, and the transfer of any smell and moisture is avoided. But it does not have a dehumidifying function. The existing rotary wheel type solid adsorption dehumidifying unit in the market is not only complex in structure and expensive in price, but also high in regeneration temperature, and can be regenerated only by using high-temperature steam of conventional energy.
In the prior art, chinese utility model patent ZL201820916087.0 discloses a constant temperature type bidirectional flow dehumidifier, which comprises a cabinet body, wherein the front end of the cabinet body is provided with an air return inlet, an air supply outlet, an evaporator and a condenser; the heat exchange cavity is positioned at the front side and communicated with the air supply outlet and the air exhaust duct, and a heat exchanger is arranged in the heat exchange cavity; the air exhaust cavity is positioned at the rear side and communicated with the air exhaust duct and the air exhaust outlet, and an air exhaust fan is arranged in the air exhaust cavity. The utility model is provided with a front air port and a rear air port, wherein the front end and the rear end are respectively provided with an air inlet and an air outlet to form a bidirectional flow air channel; the heat generated in the dehumidification process is discharged along with the exhaust flow through the heat exchanger through heat exchange, so that the temperature of the air supply after dehumidification is reduced and the constant temperature effect is kept. The dehumidification device is provided with a discrete dehumidification cavity and a heat exchanger which respectively complete dehumidification and heat exchange functions, and has the advantages of large overall volume, low efficiency and high equipment and operation cost.
Disclosure of Invention
The invention aims to provide a constant-temperature compact cross-flow type solid adsorption dehumidification method and a dehumidification bed aiming at the defects of the heat exchange dehumidification equipment, wherein the dehumidification and heat exchange processes are integrated in one device through the improved compact efficient cross-flow type adsorption dehumidification bed structure design and the process condition control, so that the heat transfer efficiency is improved, and the low-grade waste heat can be effectively utilized; the dehumidification and regeneration efficiency is improved by controlling the temperature and the humidity of the solid particles during working, and the effects of saving equipment cost, reducing energy consumption and saving energy are achieved.
In order to achieve the purpose, the invention provides the following technical scheme:
a constant-temperature compact cross-flow type solid adsorption dehumidification method is characterized by comprising the following steps:
(1) arranging a constant-temperature compact cross-flow type solid adsorption dehumidification bed, which comprises a cubic metal shell and a plurality of layers of metal clapboards arranged in the shell; wherein, a corrugated metal heat-conducting fin with a W-shaped cross section is arranged in the space between the upper and lower adjacent metal clapboards, and when the gap is longitudinally communicated, an air dehumidification channel layer is formed; when the gap is transversely penetrated, an air constant temperature channel layer is formed; a porous solid adsorption particle material layer is arranged on the surface of the metal heat conduction fin in the air dehumidification channel layer; the dehumidification channel layer and the constant temperature channel layer are arranged in a multi-layer mode in an alternating mode and are arranged up and down; all the channel layers are closed; the dehumidification channel layers are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group; the constant temperature channel layers are communicated with each other through the constant temperature air inlet/outlet to form a constant temperature channel group;
(2) and (3) an adsorption dehumidification process: introducing high-humidity air at a set temperature to be dehumidified into an air inlet of the dehumidification channel group, condensing moisture in the air into small water drops through surface pore structures of the porous solid adsorption particle materials arranged on the surfaces of the metal heat conduction fins in the air dehumidification channel layers, adsorbing and locking the small water drops, releasing heat, and outputting dry air at an air outlet of the air outlet to finish dehumidification operation; the heat generated by the porous solid adsorption particle material is transferred to the adjacent constant-temperature channel layers through the metal partition plate and is taken away in time by the normal-temperature air flow flowing in the constant-temperature channel layers, so that the air temperature in each dehumidification channel layer is kept at the normal-temperature level, and the porous solid adsorption particle material is continuously subjected to adsorption operation;
(3) the desorption and regeneration process comprises the following steps: hot air with a set temperature range is introduced into the air inlet/outlet of the dehumidification channel layer, the heat energy of the hot air enables small water drops adsorbed by the porous solid adsorption particle material arranged on the surface of the metal heat conduction fin to absorb heat steam and convert the heat steam into steam, the steam is taken away along with the air flow and is discharged from the air inlet/outlet, the adsorption capacity of the porous solid adsorption particle material is recovered, and the regeneration is completed; in the process of introducing hot air and regenerating the solid adsorption particle material, heat exceeding a set temperature range is transferred to the adjacent constant-temperature channel layers through the metal partition plate and is timely taken away by normal-temperature air flow flowing in the constant-temperature channel layers, so that the air temperature in each dehumidification channel layer is kept at a set level, and the porous solid adsorption particle material is continuously subjected to desorption regeneration operation;
(4) and (4) repeating the steps (2) to (3) until the air dehumidification operation is finished.
The porous solid adsorption particle material layer arranged on the surface of the metal heat conduction fin in the step (1) is a structural layer formed by bonding desiccant particles on the surface of the metal heat conduction fin through an adhesive, and the thickness of the porous solid adsorption particle material layer is not more than 3 mm.
The dehumidifying agent particles are solid particles and are made of a composite material consisting of graphene and silica gel powder or a composite material consisting of carbon fibers and silica gel powder, and the particle size of the dehumidifying agent particles is 70 +/-5 microns; the adhesive is carboxymethyl cellulose adhesive, and the etherification degree of the carboxymethyl cellulose adhesive is 0.5 to 0.8.
In the step (1), the adopted metal material is aluminum, and the length, width and height of an air dehumidification channel group arranged in a cube formed by the metal shell and the metal partition are positively correlated with the wet air flux; the length, width and height of the air constant temperature channel group arranged in the cube are positively correlated with the wet air flux and the temperature value of the regenerated hot air; and the total volume of the air constant temperature channel group is larger than that of the dehumidification channel group.
Introducing high-humidity air to be dehumidified with a set temperature into the dehumidification channel group in the step (2), wherein the relative humidity of the air is 70-90% RH and the temperature of the air is 20-40 ℃; the temperature range set in the adsorption and dehumidification operation process is 20-50 ℃; in the dehumidification process, normal-temperature air is used for cooling the hot and humid air, the cooled air is closer to a saturated state, and meanwhile, the temperature is controlled within the optimal working condition range of the desiccant particles, so that the dehumidification efficiency is improved.
In the step (3), the temperature of the low-grade-energy hot air introduced into the dehumidification channel group and with the set temperature is 90 ℃ to 120 ℃, and the temperature range set in the desorption regeneration operation process is 30 ℃ to 100 ℃.
The constant-temperature compact cross-flow solid adsorption dehumidification bed for implementing the method is characterized by comprising a cubic metal shell and a plurality of layers of metal clapboards arranged in the shell; wherein, a corrugated metal heat-conducting fin with a W-shaped cross section is arranged in the space between the upper and lower adjacent metal clapboards, and when the gap is longitudinally communicated, an air dehumidification channel layer is formed; when the gap is transversely penetrated, an air constant temperature channel layer is formed; a porous solid adsorption particle material layer is arranged on the surface of the metal heat conduction fin in the air dehumidification channel layer; the dehumidification channel layer and the constant temperature channel layer are arranged in a multi-layer mode in an alternating mode and are arranged up and down; all the channel layers are mutually sealed; the dehumidification channel layers are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group; the constant temperature channel layers are communicated with each other through the constant temperature air inlet/outlet to form a constant temperature channel group.
The cubic metal shell and the metal partition plate are both made of metal aluminum, and the thickness of the multilayer metal partition plate arranged in the shell is less than or equal to 2 mm.
The height of the dehumidification channel layer (2) and the thermostatic channel layer (3) is less than or equal to 8mm,
the metal heat conduction fins are made of metal aluminum, and the thickness of the metal heat conduction fins is less than or equal to 3 mm; the metal heat conduction fins arranged in the constant-temperature channel layer (3) are 3-5 folds less than the metal heat conduction fins arranged in the dehumidification channel layer (2), so that the sectional area of an air channel in the constant-temperature channel layer (3) is larger than that of the dehumidification channel layer (2).
The invention has the technical effects and advantages that:
1. the constant-temperature compact cross-flow solid adsorption dehumidification method and the dehumidification bed integrate dehumidification and heat exchange in one device, have compact structure, are easy to manufacture, operate and use, and simultaneously greatly improve the heat transfer efficiency; the dehumidification bed provided by the invention has the characteristics of compact structure, lower cost, high heat transfer efficiency and low regeneration temperature, can effectively utilize low-grade waste heat, is green and pollution-free, and is energy-saving and environment-friendly.
2. According to the invention, the metal heat conduction fins are bonded with the solid desiccant particles to form the porous solid adsorption particle material layer, and the porous solid adsorption particle material layer and the metal partition plate form the dehumidification channel layer, so that the air contact surface area can be greatly improved, and meanwhile, the working temperature of the particles is controlled by a plate-type cross-flow heat exchange mode of the adjacent channel layers, so that the dehumidification adsorption and desorption regeneration efficiency is greatly improved; the adjacent layers are alternately arranged, so that the air with different temperatures in each channel flows in a cross mode, the rapid heat exchange between the air and the air can be realized, and the temperature in the dehumidification channel layer can be kept stable.
3. The cross-flow plate-fin sensible heat exchanger adopted by the dehumidification bed provided by the invention is characterized in that corrugated metal heat conduction fins are tightly arranged among metal flat plates (metal partition plates) of each layer and the periphery of each layer is sealed, and has the advantages of large heat transfer area of unit volume, high heat transfer efficiency, small fluid resistance, small heat capacity, compact structure, capability of allowing several media to exchange heat and the like; the dehumidification bed has compact structure, no moving parts, strong reliability and long service life.
4. The metal heat conducting fin between each layer provided by the invention has the main function of strengthening heat transfer and also has the function of strengthening the strength of the two metal clapboards, in the heat exchanger, part of heat is transferred through the clapboards in the heat exchange between two adjacent channels, but most of the heat is transferred through the corrugated fins, and the corrugated fins are arranged between flat plates, so the heat transfer area is greatly increased, and the heat transfer area in the unit volume of the heat exchanger is more than 10 times larger than that of a common tubular heat exchanger. The metal heat conduction fins can obtain heat exchangers in forms of cross flow, countercurrent and the like through combination of different arrangement directions among the channels. It has the advantages of large heat transfer area per unit volume, high heat transfer efficiency, small fluid resistance, small heat capacity, compact structure, and the like, and allows several media to exchange heat.
5. The dehumidification bed provided by the invention has the advantages of compact structure and small volume, and is suitable for various occasions. The method and the device can be widely applied to ventilation, energy recovery, cooling, heating, dehumidification and waste heat recovery in the industries of heating ventilation, telecommunication, electric power, textile, automobile, food, medical treatment, agriculture, animal husbandry, baking house, drying, welding, boiler and the like.
Drawings
FIG. 1 is a schematic view of the overall configuration of a dehumidification bed according to an embodiment of the present invention;
fig. 2 is a partially enlarged structural view of the dehumidification channel layer in fig. 1.
In the figure: 100. an adsorption dehumidification bed; 1. a cubic metal housing; 2. air dehumidification channel layer(s); 3. air constant temperature channel layer(s); 4. a metal separator; 5. a metal heat-conducting fin; 6. a layer of porous solid adsorbent particulate material.
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. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. 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.
Referring to the attached drawings 1 and 2, the constant-temperature compact cross-flow type solid adsorption dehumidification method provided by the embodiment of the invention comprises the following steps:
(1) arranging a constant-temperature compact cross-flow type solid adsorption dehumidification bed 100 which comprises a cubic metal shell 1 and a plurality of layers of metal partition plates 4 arranged in the shell 1; wherein, a corrugated metal heat-conducting fin 5 with a W-shaped cross section is arranged in the space between the upper and lower adjacent two layers of metal clapboards 4, and when the gap is longitudinally communicated, an air dehumidification channel layer 2 is formed; when the gap is transversely penetrated, an air constant temperature channel layer 3 is formed; a porous solid adsorption particle material layer 6 is arranged on the surface of the metal heat conduction fin 5 in the air dehumidification channel layer 2; the dehumidification channel layer 2 and the constant temperature channel layer 3 are arranged in a multi-layer and alternate mode in an up-down mode; all the channel layers are closed; the dehumidification channel layers 2 are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group 2; the constant temperature channel layers 3 are communicated with each other through a constant temperature air inlet/outlet to form a constant temperature channel group 3;
the porous solid adsorption particle material layer 6 arranged on the surface of the metal heat conduction fin is a structural layer formed by bonding desiccant particles on the surface of the metal heat conduction fin 5 through an adhesive, and the thickness of the structural layer is not more than 3 mm.
The dehumidifying agent particles are solid particles and are made of a composite material consisting of graphene and silica gel powder or a composite material consisting of carbon fibers and silica gel powder, and the particle size of the dehumidifying agent particles is 70 +/-5 microns; the adhesive is carboxymethyl cellulose adhesive, and the etherification degree of the carboxymethyl cellulose adhesive is 0.5 to 0.8.
The dehumidification bed comprises a cubic metal shell 1 and a metal partition plate 4, wherein the adopted metal material is aluminum; the length, the width and the height of the air dehumidification channel group 2 arranged in the cube formed by the metal shell 1 and the metal partition plate 4 are positively correlated with the wet air flux; the length, the width and the height of the air constant temperature channel group 3 arranged in the cube 1 are positively correlated with the wet air flux and the temperature value of the regenerated hot air; the total volume of the air constant-temperature channel group 3 is larger than that of the dehumidification channel group; in this embodiment, the dehumidification bed 100 has a length, a width and a height of 240mm, and a treated air volume of 50m3/h；
(2) And (3) an adsorption dehumidification process: introducing high-humidity air with set temperature to be dehumidified into an air inlet of the dehumidification channel group 2, condensing moisture in the air into small water drops through surface pore-shaped structures of porous solid adsorption particle material layers 6 arranged on the surfaces of the metal heat conduction fins 5 in the air dehumidification channel layers 2, adsorbing and locking the small water drops, simultaneously releasing heat, and outputting dry air at an air outlet of the small water drops to finish dehumidification operation; the heat generated by the porous solid adsorption particle materials 6 is transferred to the adjacent constant temperature channel layers 3 through the metal partition plates 4 and is taken away in time by the normal temperature air flow flowing in the constant temperature channel layers, so that the air temperature in each dehumidification channel layer 2 is kept at the normal temperature level, and the porous solid adsorption particle materials 6 are continuously subjected to adsorption operation;
introducing high-humidity air to be dehumidified with a set temperature into the dehumidification channel group 2, wherein the relative humidity of the air is 70-90% RH and the temperature of the air is 20-40 ℃; the temperature range set in the adsorption and dehumidification operation process is 20-50 ℃; in the dehumidification process, normal-temperature air is used for cooling the hot and humid air, the cooled air is closer to a saturated state, and meanwhile, the temperature is controlled within the optimal working condition range of the desiccant particles, so that the dehumidification efficiency is improved.
(3) The desorption and regeneration process comprises the following steps: hot air with a set temperature range is introduced into the air inlet/outlet of the dehumidification channel layer 2, the heat energy of the hot air enables small water drops adsorbed by the porous solid adsorption particle material 6 arranged on the surface of the metal heat conduction fin 5 to absorb heat steam and convert the heat steam into steam, the steam is taken away along with the air flow and is discharged from the air inlet/outlet, the adsorption capacity of the porous solid adsorption particle material 6 is recovered, and the regeneration is completed; in the process of introducing hot air and regenerating the solid adsorption granular material 6, heat exceeding a set temperature range is transferred to the adjacent constant-temperature channel layers 3 through the metal partition plates 4 and is timely taken away by normal-temperature air flow flowing in the constant-temperature channel layers, so that the air temperature in each dehumidification channel layer 2 is kept at a set level, and the porous solid adsorption granular material 6 is continuously subjected to desorption regeneration operation;
the temperature of the low grade energy hot air with the set temperature introduced into the dehumidification channel group is 90 ℃ to 120 ℃, and the temperature range set in the desorption regeneration operation process is 30 ℃ to 100 ℃.
(4) And (4) repeating the steps (2) to (3) until the air dehumidification operation is finished.
A constant temperature compact cross-flow type solid adsorption dehumidification bed 100 for implementing the method comprises a cubic metal shell 1 in a cubic shape, a plurality of layers of metal partition plates 4 arranged in the shell 1; wherein, a corrugated metal heat-conducting fin 5 with a W-shaped cross section is arranged in the space between the upper and lower adjacent two layers of metal clapboards 4, and when the gap is longitudinally communicated, an air dehumidification channel layer 2 is formed; when the gap is transversely penetrated, an air constant temperature channel layer 3 is formed; a porous solid adsorption particle material layer 6 is arranged on the surface of the metal heat conduction fin 5 in the air dehumidification channel layer 2; the dehumidification channel layer 2 and the constant temperature channel layer 3 are arranged in a multi-layer and alternate mode in an up-down mode; the channel layers 2 and 3 are mutually sealed; the dehumidification channel layers 2 are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group 2; the thermostatic passage layers 3 are communicated with each other through the thermostatic inlet/outlet port to form a thermostatic passage group 3.
The height of the dehumidification channel layer 2 and the thermostatic channel layer 3 is less than or equal to 8 mm. In this example 8mm was chosen.
The metal heat conduction fins 5 are made of metal aluminum, and the thickness of the metal heat conduction fins is less than or equal to 3 mm; the metal heat conduction fins arranged in the constant-temperature channel layer 3 are 3-5 folds less than the metal heat conduction fins 5 arranged in the dehumidification channel layer 2, so that the sectional area of an air channel in the constant-temperature channel layer 3 is larger than that of the dehumidification channel layer 2.
The constant temperature channel layer 3 is transversely communicated, normal temperature air is introduced into an internal channel of the constant temperature channel layer, heat generated in the adsorption and dehumidification process of the adjacent dehumidification channel layer 2 is transferred in a convection and heat conduction mode, and the temperature in the dehumidification channel layer 2 is maintained within a set range.
The invention can be used for dehumidification operation by using a heat recovery air processing unit, or can be applied to various ventilation systems, such as civil and commercial ventilation systems and industrial ventilation systems.
The dehumidification bed provided by the invention is designed in a modular structure, can select the combination of sections with any size and plate stacking thickness according to parameters such as ventilation quantity, dehumidification quantity and the like, has no moving parts, and is low in equipment maintenance cost.
The dehumidification bed provided by the invention has the advantages of compact structure and small volume, and is suitable for various occasions. The method and the device can be widely applied to ventilation, energy recovery, cooling, heating, dehumidification and waste heat recovery in the industries of heating ventilation, telecommunication, electric power, textile, automobile, food, medical treatment, agriculture, animal husbandry, baking house, drying, welding, boiler and the like.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A constant-temperature compact cross-flow type solid adsorption dehumidification method is characterized by comprising the following steps:
(1) arranging a constant-temperature compact cross-flow type solid adsorption dehumidification bed, which comprises a cubic metal shell and a plurality of layers of metal clapboards arranged in the shell; wherein, a corrugated metal heat-conducting fin with a W-shaped cross section is arranged in the space between the upper and lower adjacent metal clapboards, and when the gap is longitudinally communicated, an air dehumidification channel layer is formed; when the gap is transversely penetrated, an air constant temperature channel layer is formed; a porous solid adsorption particle material layer is arranged on the surface of the metal heat conduction fin in the air dehumidification channel layer; the dehumidification channel layer and the constant temperature channel layer are arranged in a multi-layer mode in an alternating mode and are arranged up and down; all the channel layers are closed; the dehumidification channel layers are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group; the constant temperature channel layers are communicated with each other through the constant temperature air inlet/outlet to form a constant temperature channel group;
(2) and (3) an adsorption dehumidification process: introducing high-humidity air at a set temperature to be dehumidified into an air inlet of the dehumidification channel group, condensing moisture in the air into small water drops through surface pore structures of the porous solid adsorption particle material layers arranged on the surfaces of the metal heat conduction fins in the air dehumidification channel layers, adsorbing and locking the small water drops, releasing heat, and outputting dry air at an air outlet of the air outlet to finish dehumidification operation; the heat generated by the porous solid adsorption particle material is transferred to the adjacent constant-temperature channel layers through the metal partition plate and is taken away in time by the normal-temperature air flow flowing in the constant-temperature channel layers, so that the air temperature in each dehumidification channel layer is kept at the normal-temperature level, and the porous solid adsorption particle material is continuously subjected to adsorption operation;
(3) the desorption and regeneration process comprises the following steps: hot air with a set temperature range is introduced into the air inlet/outlet of the dehumidification channel layer, the heat energy of the hot air enables small water drops adsorbed by the porous solid adsorption particle material arranged on the surface of the metal heat conduction fin to absorb heat steam and convert the heat steam into steam, the steam is taken away along with the air flow and is discharged from the air inlet/outlet, the adsorption capacity of the porous solid adsorption particle material is recovered, and the regeneration is completed; in the process of introducing hot air and regenerating the solid adsorption particle material, heat exceeding a set temperature range is transferred to the adjacent constant-temperature channel layers through the metal partition plate and is timely taken away by normal-temperature air flow flowing in the constant-temperature channel layers, so that the air temperature in each dehumidification channel layer is kept at a set level, and the porous solid adsorption particle material is continuously subjected to desorption regeneration operation;
(4) and (4) repeating the steps (2) to (3) until the air dehumidification operation is finished.
2. The constant-temperature compact cross-flow type solid adsorption dehumidification method according to claim 1, wherein the porous solid adsorption particle material layer arranged on the surface of the metal heat conduction fin in the step (1) is a structural layer formed by bonding desiccant particles on the surface of the metal heat conduction fin through an adhesive, and the thickness of the structural layer is not more than 3 mm.
3. The constant-temperature compact cross-flow solid adsorption dehumidification method according to claim 2, wherein the dehumidification agent particles are solid particles made of a composite material composed of graphene and silica gel powder or a composite material composed of carbon fiber and silica gel powder, and the particle size of the solid particles is 70 ± 5 μm; the adhesive is carboxymethyl cellulose adhesive, and the etherification degree of the carboxymethyl cellulose adhesive is 0.5 to 0.8.
4. The constant-temperature compact cross-flow type solid adsorption dehumidification method according to claim 1, wherein the metal material adopted by the cubic metal shell and the metal partition plate of the dehumidification bed in the step (1) is aluminum, and the length, width and height of the air dehumidification channel group arranged in the cube formed by the metal shell and the metal partition plate are all positively correlated with the humid air flux; the length, width and height of the air constant temperature channel group arranged in the cube are positively correlated with the wet air flux and the temperature value of the regenerated hot air; and the total volume of the air constant temperature channel group is larger than that of the dehumidification channel group.
5. The constant-temperature compact cross-flow solid adsorption dehumidification method according to claim 1, wherein the high-humidity air to be dehumidified with a set temperature is introduced into the dehumidification channel group in the step (2), and the relative humidity of the air is 70% RH to 90% RH, and the temperature of the air is 20 ℃ to 40 ℃; the temperature range set in the adsorption and dehumidification operation process is 20-50 ℃; in the dehumidification process, normal-temperature air is used for cooling the hot and humid air, the cooled air is closer to a saturated state, and meanwhile, the temperature is controlled within the optimal working condition range of the desiccant particles, so that the dehumidification efficiency is improved.
6. The constant-temperature compact cross-flow solid adsorption dehumidification method according to claim 1, wherein in the step (3), the temperature of the low-grade energy hot air with the set temperature introduced into the dehumidification channel group is 90 ℃ to 120 ℃, and the temperature range set during the desorption regeneration operation is 30 ℃ to 100 ℃.
7. A constant temperature compact cross-flow type solid adsorption dehumidification bed for implementing the method of any one of claims 1 to 6, comprising a cubic metal housing, a plurality of layers of metal partitions disposed in the housing; wherein, a corrugated metal heat-conducting fin with a W-shaped cross section is arranged in the space between the upper and lower adjacent metal clapboards, and when the gap is longitudinally communicated, an air dehumidification channel layer is formed; when the gap is transversely penetrated, an air constant temperature channel layer is formed; a porous solid adsorption particle material layer is arranged on the surface of the metal heat conduction fin in the air dehumidification channel layer; the dehumidification channel layer and the constant temperature channel layer are arranged in a multi-layer mode in an alternating mode and are arranged up and down; all the channel layers are mutually sealed; the dehumidification channel layers are communicated with each other through the dehumidification air inlet/outlet to form a dehumidification channel group; the constant temperature channel layers are communicated with each other through the constant temperature air inlet/outlet to form a constant temperature channel group.
8. The constant-temperature compact cross-flow solid adsorption dehumidification bed according to claim 7, wherein the cubic metal shell and the metal partition are made of metal aluminum, and the thickness of the multiple layers of metal partitions arranged in the shell is less than or equal to 2 mm.
9. The isothermal compact cross-flow solid adsorbent desiccant bed of claim 7, wherein the height of the dehumidification channel layer and the isothermal channel layer is less than or equal to 8 mm.
10. The constant-temperature compact cross-flow solid adsorption dehumidification bed according to claim 7, wherein the metal heat conducting fins are made of metal aluminum, and the thickness of the metal heat conducting fins is less than or equal to 3 mm; the metal heat conduction fins arranged in the constant temperature channel layer are 3-5 folds less than the metal heat conduction fins arranged in the dehumidification channel layer, so that the sectional area of an air channel in the constant temperature channel layer is larger than that of the dehumidification channel layer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165318A (en) * | 2021-12-09 | 2022-03-11 | 天津大学合肥创新发展研究院 | Integrated device inner core for recovering waste heat of tail gas of internal combustion engine and post-processing |
| CN114354861A (en) * | 2022-02-17 | 2022-04-15 | 中凯达设施管理(北京)有限公司湖北分公司 | Gas monitoring equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165318A (en) * | 2021-12-09 | 2022-03-11 | 天津大学合肥创新发展研究院 | Integrated device inner core for recovering waste heat of tail gas of internal combustion engine and post-processing |
| CN114354861A (en) * | 2022-02-17 | 2022-04-15 | 中凯达设施管理(北京)有限公司湖北分公司 | Gas monitoring equipment |
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