CN115518496A - Dehumidification board, dehumidification device and drying system based on metal organic framework material - Google Patents

Abstract

The invention relates to the technical field of material drying, and discloses a dehumidification plate, a dehumidification device and a drying system based on a metal organic framework material, wherein the dehumidification plate based on the metal organic framework material comprises a plate body and a framework, the plate body is made of a temperature-sensitive polymer doped with a low critical solution temperature type by the metal organic framework material, the plate body is vertically arranged, a drainage channel is arranged on the plate body, the drainage channel is converged and communicated from the upper end of the plate body to the lower end of the plate body, and a water outlet is arranged at the lower end of the drainage channel; the skeleton sets up in the plate body, the skeleton can support the plate body. The waste gas heat recovery device can remove moisture in the waste gas of the dried material, so that the waste gas is subjected to waste heat circulation, the heat efficiency is improved, and the energy consumption of regeneration of the dried material or water vapor condensation is reduced.

Description

Dehumidification board, dehumidification device and drying system based on metal organic framework material

Technical Field

The invention relates to the technical field of material drying, in particular to a dehumidifying plate, a dehumidifying device and a drying system based on a metal organic framework material.

Background

Drying generally refers to various operations of removing moisture or other moisture in wet materials, the purpose of drying is to facilitate storage, transportation and use of the materials, the drying operation is widely applied to various departments of chemical industry, food, light industry, textile, agriculture and forestry product processing, building materials and the like, and the drying technology also generates huge energy consumption while solving the problems of mildewing and deterioration of the materials, inconvenience in transportation and the like. In the whole industrial production structure, drying is one of the processes with the largest energy consumption and accounts for 10% -15% of the industrial energy consumption all over the world.

During the drying of the material, the exhaust gases from the drying chamber have a certain residual heat, but also contain a relatively high moisture content. In the prior art, the dried chili drying device for producing the chili powder is provided, and water vapor removed from the device is discharged from the moisture discharging holes, so that about 40 percent of heat is not effectively utilized while the drying effect is achieved. If the water in the waste gas is removed for recycling the waste heat, the effects of energy conservation and consumption reduction can be achieved. In industry, solid adsorbents such as silica gel and calcium chloride are used to remove moisture from water vapor, industrial gases or organic solutions, or wet solid materials are heated by hot air, flue gas or the like in chemical production to remove moisture from the materials. However, additional heat is required for solid adsorbent regeneration.

Different implementation approaches are proposed by scholars for recycling the waste heat by removing the water. CN208688207U is a cigarette dryer, which uses silica gel material to dry gas; patent CN113008013A heating device for a dryer, which is provided with a moisture absorption assembly, uses anhydrous calcium chloride particles to absorb moisture entrained in an air flow; CN107218790A discloses a heat pump dehumidification drying device, which uses an evaporator of a heat pump system to remove moisture, and uses a refrigerant of a condenser to heat and recycle the dehumidified air. In the existing drying device or drying technology, in the process of dehydrating materials by using heat energy, the technology of circulating waste heat relates to dehydration of water, most of which relates to the use of a drying agent and the condensation of waste gas, and relates to the problems of regeneration of the drying agent, the use of a refrigerant and energy loss. Therefore, there is a need for improvements to existing material drying systems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a dehumidifying plate, a dehumidifying device and a drying system based on a metal organic frame material.

In order to achieve the purpose, the dehumidifying plate based on the metal organic framework material comprises a plate body and a framework, wherein the plate body is made of the metal organic framework material doped with a low critical solution temperature type temperature-sensitive polymer, the plate body is vertically arranged, a drainage channel is arranged on the plate body, the drainage channel is converged and communicated from the upper end of the plate body to the lower end of the plate body, and a water outlet is arranged at the lower end of the drainage channel; the skeleton sets up in the plate body, the skeleton can support the plate body.

During the use, make the waste gas stream behind the dry material through the dehumidification board and with dehumidification board surface contact, the moisture in the metal organic frame material absorption waste gas on the dehumidification board makes the moisture in the waste gas deviate from, does not need the condensation processing among the dehumidification process, and the gas temperature after the dehumidification reduces lessly, makes waste gas can carry out waste heat circulation, the increasing of heat efficiency. In the process of absorbing the moisture, the moisture is condensed in the pores of the metal organic framework material by capillary to form liquid water; along with the increase of the treated gas, the temperature of the dehumidifying board is increased to reach the low critical dissolving temperature of the temperature sensitive polymer, so that the volume of the dehumidifying board material is contracted, and liquid water generated by adsorption is released and discharged through the drainage channel and the water outlet. After the temperature of the dehumidifying plate exceeds the low critical dissolving temperature of the temperature-sensitive polymer, the dehumidifying plate can be naturally cooled at room temperature, so that the dehumidifying capability of the dehumidifying plate is recovered, and the energy consumption is reduced.

In one embodiment, the distribution shape of the drainage channel is leaf vein shape; each branch of the drainage channel can enable water droplets to be generated from one end far away from the water outlet to one end close to the water outlet, and the Laplace differential pressure acting force is applied to the water droplets.

When water flows on the drainage channel, the drainage channel enables the water to be acted by Laplace pressure difference action force in the flowing process, the gathering flowing speed of the water is increased, and the water flows out of the water outlet faster.

In one embodiment, the skeleton is arranged corresponding to the shape of the drainage channel and embedded in the drainage channel.

In one embodiment, the surface of the skeleton has different wettability to water, and the contact angle of water drops on the surface of the skeleton gradually decreases from one end of the skeleton far away from the water outlet to one end of the skeleton close to the water outlet.

The framework supports the plate body, so that the structure of the dehumidification plate is more stable. Meanwhile, the wettability difference of the surface of the framework has a wettability gradient, and the liquid water is conveyed along the drainage channel to be promoted, so that the water liquid flows out of the water outlet more quickly.

In one embodiment, the plate body is further provided with heat conducting particles dispersed and doped therein, wherein the heat conducting particles have a heat conductivity coefficient larger than that of the metal organic frame material.

The heat conducting particles accelerate the dehumidifying board to transfer and absorb heat, so that the temperature-sensitive polymer can reach the low critical dissolving temperature more quickly, and the metal organic framework material releases the adsorbed liquid water.

In one embodiment, the low critical solution temperature type temperature sensitive polymer is poly (N-isopropylacrylamide), and the metal organic framework material is one or more of MOF-808, MOF-801, MOF-1, MOF-303, MOF-841, MOF-802, MOF-805, MOF-806, MOF-804, UIO-66, MIL-101, MIL-53 or MIL-125.

The dehumidification device based on the metal organic framework material comprises a dehumidification chamber and a dehumidification plate based on the metal organic framework material, wherein the dehumidification plate is arranged in any one of the embodiments, the dehumidification chamber is provided with an air inlet and an air outlet, the bottom of the dehumidification chamber is provided with a water collection tank, and one end of the water collection tank is provided with a water outlet; the dehumidification board is arranged in the dehumidification chamber at intervals, and the water outlet is communicated with the water collecting tank.

The drying system based on the metal organic framework material comprises a drying chamber, a circulating fan, an air heater and the dehumidifying device based on the metal organic framework material in any embodiment, wherein an air outlet of the air heater is connected with an air inlet of the drying chamber, an air outlet of the drying chamber is connected with an air inlet of the dehumidifying chamber, an air outlet of the dehumidifying chamber is connected with an air inlet of the circulating fan, and an air outlet of the circulating fan is connected with an air inlet of the air heater.

When the drying system is used, the air heater heats air and then sends the air into the drying chamber, waste gas after drying materials enters the dehumidifying chamber of the dehumidifying device to be dehydrated, the temperature of the dehumidified gas is reduced slightly, the dehumidified gas enters the air heater again to supplement heat under the pressurization of the circulating fan, the air can perform waste heat circulation in the whole drying system, and the heat efficiency of the drying system is improved. After the temperature of the dehumidifying plate exceeds the low critical dissolving temperature of the temperature-sensitive polymer, the dehumidifying plate can be naturally cooled at room temperature, the dehumidifying capacity is recovered, and the energy consumption is further reduced.

The drying system based on the metal organic frame material in one embodiment further comprises a blower, a humidity sensor and a control valve, wherein an air outlet of the blower is connected with an air inlet of the drying chamber, and an air inlet of the blower is connected with an air outlet of the air heater and an air outlet of the drying chamber; the humidity sensor with the control valve sets up the drying chamber with on the connecting line between the dehumidification room, humidity sensor's signal is used for control the control valve, and control the air inlet of forced draught blower with the gas vent selective intercommunication of drying chamber.

The humidity sensor monitors the humidity of the waste gas flowing into the dehumidification chamber from the drying chamber, and when the humidity of the waste gas is lower than a target value, the blower can send the waste gas exhausted from the drying chamber into the air inlet of the drying chamber again, so that the drying gas can be fully utilized.

The metal organic frame material based drying system in one embodiment further comprises an air supplementary regulator connected to an air inlet of the air heater, the air supplementary regulator being selectively turned on or off according to air pressure in the dehumidifying chamber.

The air supplementary regulator is used for supplementing air from the outside according to the air pressure in the dehumidification chamber, so that sufficient air enters the drying chamber to dry the materials, and the energy utilization efficiency of the drying system is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic structural diagram of a dehumidifying board according to an embodiment of the present invention;

FIG. 2 is a front view of a dehumidifying apparatus based on metal organic frame material according to an embodiment of the present invention;

FIG. 3 is a left side view of the MOF based dehumidification device shown in FIG. 2;

FIG. 4 is a schematic structural diagram of a drying system based on metal organic framework material according to an embodiment of the present invention;

reference numerals:

1-a drying chamber, 2-a circulating fan, 3-an air heater, 4-a blower, 5-a humidity sensor, 6-a control valve and 7-an air supplement regulator;

8-a dehumidifying device, 81-a dehumidifying chamber, 811-an air inlet, 812-an air outlet, 82-a water collecting tank, 821-a water outlet, 83-a dehumidifying plate, 831-a plate body, 8311-a drainage channel, 8312-a water outlet, 832-a framework and 84-a clapboard.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

It is to be understood that, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, being fixedly connected, releasably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, in one embodiment, the dehumidifying board 83 based on the metal organic frame material includes a board 831 and a skeleton 832, and is used for dehumidifying the exhaust gas after drying the material, so as to remove moisture in the exhaust gas, perform waste heat circulation, improve thermal efficiency, and reduce energy consumption of regeneration of the drying material or water vapor condensation.

Specifically, referring to fig. 1, the dehumidifying plate 83 includes a plate body 831 and a frame 832. The plate body 831 is made of a metal organic frame material doped with a low critical solution temperature type temperature sensitive polymer. The plate body 831 is vertically arranged, a drainage channel 8311 is arranged on the plate body 831, and the drainage channel 8311 is converged and communicated from the upper end of the plate body 831 to the lower end of the plate body 831. The lower end of the drainage channel 8311 is provided with a water outlet 8312. The frame 832 is disposed within the panel 831, and the frame 832 is capable of supporting the panel 831.

When the dehumidifying plate 83 in this embodiment is used, the exhaust gas after drying the material passes through the dehumidifying plate 83 and contacts the surface of the dehumidifying plate 83. The metal organic frame material on the dehumidifying plate 83 adsorbs moisture in the exhaust gas, so that the moisture in the exhaust gas is removed, condensation treatment is not needed in the dehumidifying process, the temperature of the dehumidified gas is reduced slightly, the exhaust gas can be subjected to waste heat circulation, and the heat efficiency is improved. In the process of absorbing the moisture, the moisture is condensed in the pores of the metal organic framework material by capillary to form liquid water; with the increase of the treated gas, the temperature of the dehumidifying plate 83 is raised to reach the low critical solution temperature of the temperature sensitive polymer, so that the volume of the dehumidifying plate material is contracted, and liquid water generated by adsorption is released and discharged through the drainage channel 8311 and the water outlet 8312. After the temperature of the dehumidifying plate 83 exceeds the low critical solution temperature of the temperature sensitive polymer, the dehumidifying plate 83 can be naturally cooled at room temperature, so that the dehumidifying capability of the dehumidifying plate 83 is recovered, and the energy consumption is reduced.

The metal-organic framework material is a crystalline porous material having a periodic network structure formed by self-assembly of transition metal ions and organic ligands. In one embodiment, the metal organic framework material is one or more of MOF-808, MOF-801, MOF-1, MOF-303, MOF-841, MOF-802, MOF-805, MOF-806, MOF-804, uiO-66, MIL-101, MIL-53, or MIL-125. The metal organic framework material can also be other metal organic framework materials with high specific surface area and high porosity. The low critical solution temperature type temperature sensitive polymer is a heat sensitive high molecular material which has hydrophilic and hydrophobic groups on the molecular chain, and the volume of the material can shrink when the material absorbs heat and rises to a certain temperature, and reversible hydrophilic-hydrophobic transition can also occur. In one embodiment, the low critical solution temperature type temperature sensitive polymer is poly (N-isopropylacrylamide). It is understood that the low critical solution temperature type temperature sensitive polymer may also be selected from other materials having different exhaust gas temperatures. The plate 831 may be formed by molding a temperature sensitive polymer and a powdered metal organic frame material into a plate structure by a template method. When the dehumidifying plate 83 contacts with exhaust gas, the hydrophilic group on the temperature-sensitive polymer and the metal organic framework material adsorb water, and water vapor adsorbed on the pore surface of the metal organic framework material is saturated and condensed, and seeps out along with gravity and surface energy overcoming the coalescence of water. When the temperature reaches the low critical solution temperature of the temperature-sensitive polymer, the temperature-sensitive polymer undergoes a phase change from hydrophilicity to hydrophobicity, and the volume is shrunk, so that liquid water is rapidly discharged. And is discharged through the drain channel 8311 and the water outlet 8312.

In one embodiment, the drainage channels 8311 are distributed in a leaf vein shape; each branch of the drainage channel 8311 enables the generation of a droplet of water from an end distal from the outlet 8312 to an end proximal to the outlet 8312, a laplace pressure differential force. Specifically, each branch of the drainage channel 8311 is a conical structure (which can be a complete cone or an incomplete cone) with a continuously increasing cross-sectional radius from the end far away from the water outlet 8312 to the end close to the water outlet 8312. For example, the branches of the drainage channel 8311 may be configured in the shape of a fairy-palm thorn. When water drops flow on the drainage channel 8311, the drainage channel 8311 enables water to be acted by Laplace pressure difference acting force in the flowing process, so that the converging flowing speed of the water is increased, and the water can flow into the water collecting tank 82 more quickly. In one embodiment, the frame 832 is configured to correspond to the shape of the drainage channel 8311 and is embedded within the drainage channel 8311. Specifically, the framework 832 is disposed corresponding to each branch of the drainage channel 8311. In one embodiment, the surface of backbone 832 has a different wettability for aqueous fluids. The contact angle of the water droplet on the surface of the skeleton 832 gradually decreases from the end of the skeleton 832 far away from the water outlet 8312 to the end of the skeleton 832 near the water outlet 8312. It will be appreciated that wettability is an important property of solid surfaces, and that wettability depends primarily on the magnitude of the surface energy. The lower the surface energy of the solid, the more hydrophobic the surface, and the greater the contact angle of the water droplet on the surface of backbone 832. Conversely, the higher the solid surface energy, the more hydrophilic, and the smaller the contact angle of the water droplet on the surface of backbone 832. The different wettability of the surface of the skeleton 832 to water may be achieved by different degrees of roughness or different material coatings of the surface of the skeleton 832. The frame 832 supports the plate 831 to stabilize the structure of the dehumidifying plate 83. Meanwhile, the wettability difference of the surface of the framework 832 plays a role in forming a wettability gradient and promoting the liquid water to be conveyed along the drainage channel 8311, so that the liquid water flows out of the water outlet 8312 more quickly. The frame 832 may be formed by machining or the like using a metal plate material such as copper, aluminum, or the like. In one embodiment, the diversion channel 8311 is oriented opposite to the direction of convergence of the diversion channel 8311, which is configured as a multi-stage diverging structure. The skeletons 832 are correspondingly arranged into multi-stage branched structures, and the wettability difference between the adjacent two-stage branched structures ensures that the contact angle difference of water droplets on the corresponding surfaces of the skeletons 832 is 8-12 degrees. The pushing action of the water drops between the two adjacent branched structures of the framework 832 is obvious, and the framework 832 is also convenient to arrange more branches. The bifurcation grade of the framework 832 is coordinated with the wettability gradient acting force between two adjacent bifurcation structures, so that the water can be collected fully and quickly.

In one embodiment, the plate 831 is further doped with heat conductive particles having a thermal conductivity greater than that of the metal organic frame material. The heat conducting particles accelerate the dehumidifying plate 83 to transfer and absorb heat, so that the temperature sensitive polymer can reach the low critical solution temperature more quickly, and the metal organic framework material releases the adsorbed liquid water. Preferably, the heat conducting particles can be metal particles with good heat conducting property, gold nanoparticles, silver nanoparticles, copper nanoparticles and the like.

When the dehumidifying plate 83 based on the metal organic frame material is used, the exhaust gas flow after drying materials passes through the dehumidifying plate 83 and contacts with the surface of the dehumidifying plate 83, the metal organic frame material on the dehumidifying plate 83 adsorbs moisture in the exhaust gas, so that the moisture in the exhaust gas is removed, condensation treatment is not needed in the dehumidifying process, the temperature of the dehumidified gas is reduced less, the exhaust gas can be subjected to waste heat circulation, and the heat efficiency is improved. In the process of absorbing the moisture, the moisture is condensed in the pores of the metal organic framework material by capillary to form liquid water; with the increase of the treated gas, the temperature of the dehumidifying plate 83 is raised to reach the low critical solution temperature of the temperature sensitive polymer, so that the volume of the dehumidifying plate material is contracted, and liquid water generated by adsorption is released and discharged through the drainage channel 8311 and the water outlet 8312. After the temperature of the dehumidifying plate 83 exceeds the low critical solution temperature of the temperature sensitive polymer, the dehumidifying plate 83 can be naturally cooled at room temperature, so that the dehumidifying capability of the dehumidifying plate 83 is recovered, and the energy consumption is reduced.

Referring to fig. 1 to 3, a dehumidifying apparatus 8 based on metal organic frame material according to an embodiment of the present invention includes a drying chamber 1 and a dehumidifying plate 83 based on metal organic frame material according to any one of the above embodiments. The dehumidifying chamber 81 is provided with an air inlet 811 and an air outlet 812. The bottom of the dehumidifying chamber 81 is provided with a water collecting tank 82, and one end of the water collecting tank 82 is provided with a water outlet 821. The dehumidifying plates 83 are disposed at intervals in the dehumidifying chamber 81, and the water outlet 8312 is communicated with the water collecting tank 82. Specifically, the exhaust gas after drying the material is sent into the dehumidifying chamber 81 from the air inlet 811, the dehumidifying plate 83 is contacted with the exhaust gas to perform the dehydration treatment, and the treated gas is sent out from the air outlet 812. In one embodiment, the dehumidifying plates 83 are arranged in parallel at intervals. The air inlet 811 and the air outlet 812 are oppositely disposed at both sides of the dehumidifying plate 83 in the gap extending direction. The waste gas after drying the material can disperse and flow into the gap of the dehumidifying plate 83, and the contact area between the waste gas and the dehumidifying plate 83 is increased, so that the moisture in the waste gas is fully absorbed and removed. In one embodiment, a partition is provided between the dehumidification chamber 81 and the water collection tank 82. The lower end of the dehumidifying plate 83 extends into the water collecting tank 82 through the partition plate. The partition prevents the liquid water in the water collection sump 82 from being evaporated again into the dehumidifying chamber 81, thereby improving the utilization efficiency of the dehumidifying plate 83.

Referring to fig. 1 to 4, a drying system based on a metal organic frame material according to an embodiment of the present invention includes a drying chamber 1, a circulating fan 2, an air heater 3, and a dehumidifying apparatus 8 based on a metal organic frame material according to any one of the above embodiments. The drying chamber 1 is provided according to the drying material. The circulation fan 2 may employ a fan, a blower, or the like to flow air between the respective devices.

Referring to fig. 4, specifically, an air outlet of the air heater 3 is connected to an air inlet of the drying chamber 1, an air outlet of the drying chamber 1 is connected to an air inlet 811 of the dehumidifying chamber 81, an air outlet 812 of the dehumidifying chamber 81 is connected to an air inlet of the circulating fan 2, and an air outlet of the circulating fan 2 is connected to an air inlet of the air heater 3. When the air drying device is used, the air heater 3 heats air and then sends the air into the drying chamber 1, the waste gas after drying materials enters the dehumidifying chamber 81 of the dehumidifying device 8 to be dehydrated, the temperature of the dehumidified gas is reduced slightly, and the dehumidified gas enters the air heater 3 again to supplement heat under the pressurization of the circulating fan 2 to enter the next circulation. The air quantity lost in the circulation process only needs a small amount of ambient air to supplement, and the air and the dehumidified waste gas are heated in the air heater 3 at the same time, and the dehumidified waste gas has certain waste heat, so the heating time in the air heater 3 is shortened, and the operation efficiency of the whole drying system is improved. After the temperature of the dehumidifying plate 83 exceeds the low critical solution temperature of the temperature sensitive polymer, the dehumidifying plate 83 can be naturally cooled at room temperature to recover the dehumidifying capability. Further reducing energy consumption. In one embodiment, the air heater 3 is a solar heater. To save energy. In one embodiment, the number of the dehumidifying apparatuses 8 is plural. The dehumidifying means 8 are arranged in parallel, and the drying chamber 1 and the circulation fan 2 are optionally connected simultaneously to one or more dehumidifying means 8. The number of the dehumidifying devices 8 is multiple, when the dehumidifying device works, a part of the dehumidifying devices 8 can be selected to perform dehumidifying treatment, and the part of the dehumidifying devices 8 recover the dehumidifying capability through natural cooling, so that the utilization of energy is reduced.

The drying system based on the metal organic frame material in one embodiment further comprises a blower 4, a humidity sensor 5 and a control valve 6. The air outlet of the blower 4 is connected with the air inlet of the drying chamber 1, and the air inlet of the blower 4 is connected with the air outlet of the air heater 3 and the air outlet of the drying chamber 1. A humidity sensor 5 and a control valve 6 are provided on a connection line between the drying chamber 1 and the dehumidifying chamber 81. The signals of the humidity sensor 5 are used to control the control valve 6 and to control the selective communication of the air inlet of the blower 4 with the air outlet of the drying chamber 1. The humidity sensor 5 monitors the humidity of the exhaust gas flowing into the dehumidifying chamber 81 from the drying chamber 1, and when the humidity of the exhaust gas is lower than a target value, the blower 4 can send the exhaust gas discharged from the drying chamber 1 to the inlet of the drying chamber 1 again, so that the drying gas can be fully utilized. In particular, the control valve 6 may be an electrically or hydraulically controlled flow valve or a switching valve. The blower 4 is a fan, a blower, or the like. It is understood that the control valve 6, the blower 4, and the like may be controlled by a controller. The humidity sensor 5 is capable of delivering a measured signal to the controller and causing the controller to control the control valve 6 and the blower 4 accordingly.

The drying system based on metal organic frame material in an embodiment further comprises an air make-up regulator 7. The air make-up regulator 7 is connected to an air inlet of the air heater 3, and the air make-up regulator 7 is selectively turned on or off according to the air pressure in the dehumidifying chamber 81. Specifically, a pressure sensor or other gas pressure testing device may be disposed in the dehumidifying chamber 81, and the controller of the air supplementary regulator 7 controls the start and stop of the air supplementary regulator 7 according to a signal of the pressure sensor or the gas pressure testing device. The air make-up regulator may be an air pump or the like. The air supplementary regulator 7 supplements air from the outside according to the air pressure in the dehumidifying chamber 81, so that sufficient air enters the drying chamber 1 to dry the materials, and the energy utilization efficiency of the drying system is improved.

When the drying system based on the metal organic frame material is used, the air heater 3 heats the air and then sends the air into the drying chamber 1, the waste gas after drying the material enters the dehumidifying chamber 81 of the dehumidifying device 8 to be dehumidified, the temperature of the dehumidified gas is reduced slightly, the dehumidified gas enters the air heater 3 again to supplement heat under the pressurization of the circulating fan 2, the air can perform waste heat circulation in the whole drying system, and the heat efficiency of the drying system is improved. After the temperature of the dehumidifying plate 83 exceeds the low critical solution temperature of the temperature sensitive polymer, the dehumidifying plate 83 can be naturally cooled at room temperature, the dehumidifying capability is recovered, and the energy consumption is further reduced.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. A dehumidification plate based on a metal organic framework material is characterized by comprising a plate body and a framework, wherein the plate body is made of the metal organic framework material doped with a low critical solution temperature type temperature-sensitive polymer, the plate body is vertically arranged, a drainage channel is arranged on the plate body, the drainage channel is converged and communicated from the upper end of the plate body to the lower end of the plate body, and a water outlet is formed in the lower end of the drainage channel; the skeleton sets up in the plate body, the skeleton can support the plate body.

2. The metal-organic frame material based dehumidifying panel according to claim 1, wherein the distribution shape of the drainage channels is leaf vein-like; each branch of the drainage channel can enable water droplets to be generated from one end far away from the water outlet to one end close to the water outlet, and the Laplace differential pressure acting force is applied to the water droplets.

3. The dehumidification panel based on metal-organic framework material according to claim 1 or 2, wherein the skeleton is disposed corresponding to the shape of the drainage channel and embedded in the drainage channel.

4. The metal-organic framework material-based dehumidizer plate according to claim 3, wherein the surface of said framework has different wettability to water, and the contact angle of water drops on the surface of said framework gradually decreases from the end of said framework far from said water outlet to the end of said framework near said water outlet.

5. The dehumidification plate based on metal organic frame material as claimed in claim 1, wherein the plate body is further doped with heat conductive particles having a thermal conductivity greater than that of the metal organic frame material.

6. The dehumidification plate based on metal-organic framework material according to claim 1, wherein the low critical solution temperature type temperature sensitive polymer is poly (N-isopropylacrylamide), and the metal-organic framework material is one or more of MOF-808, MOF-801, MOF-1, MOF-303, MOF-841, MOF-802, MOF-805, MOF-806, MOF-804, UIO-66, MIL-101, MIL-53 or MIL-125.

7. A dehumidifying device based on metal organic frame material, comprising a dehumidifying chamber and a dehumidifying board based on metal organic frame material as claimed in any one of claims 1 to 6, wherein the dehumidifying chamber is provided with an air inlet and an air outlet, the bottom of the dehumidifying chamber is provided with a water collecting tank, and one end of the water collecting tank is provided with a water outlet; the dehumidification board is arranged in the dehumidification chamber at intervals, and the water outlet is communicated with the water collecting tank.

8. A drying system based on metal organic frame material, comprising a drying chamber, a circulating fan, an air heater, and further comprising a dehumidifying device based on metal organic frame material as claimed in claim 7, wherein an air outlet of the air heater is connected to an air inlet of the drying chamber, an air outlet of the drying chamber is connected to an air inlet of the dehumidifying chamber, an air outlet of the dehumidifying chamber is connected to an air inlet of the circulating fan, and an air outlet of the circulating fan is connected to an air inlet of the air heater.

9. The metal organic frame material based drying system of claim 8, further comprising a blower, a humidity sensor and a control valve, wherein an air outlet of the blower is connected to an air inlet of the drying chamber, and an air inlet of the blower is connected to an air outlet of the air heater and an air outlet of the drying chamber; the humidity sensor with the control valve sets up the drying chamber with on the connecting line between the dehumidification room, humidity sensor's signal is used for control the control valve, and control the air inlet of forced draught blower with the gas vent selective intercommunication of drying chamber.

10. The metal organic frame material based drying system of claim 8 or 9, further comprising an air supplementary regulator connected to an air inlet of the air heater, the air supplementary regulator being selectively turned on or off according to an air pressure in the dehumidifying chamber.

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