CN112169533A

CN112169533A - Reproducible adsorption material, adsorption device and household appliance

Info

Publication number: CN112169533A
Application number: CN202010879690.8A
Authority: CN
Inventors: 陈龙; 唐奕文; 代光剑; 何凤英; 姚俊红
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-01-05

Abstract

The application provides a can palingenetic adsorption material, adsorption equipment and domestic appliance, include: the mixed amine substances and the magnetic conductive substances are uniformly distributed in the adsorption material; the amine substance is used for adsorbing carbon dioxide in the air, and the magnetic conductive substance is used for heating the amine substance under the action of the alternating magnetic field, so that the adsorbed carbon dioxide is desorbed from the amine substance. Through the mode, the heating regeneration device can enable the amine substances to be heated uniformly in the heating regeneration process.

Description

Reproducible adsorption material, adsorption device and household appliance

Technical Field

The application belongs to the technical field of gas purification, and in particular relates to a reproducible adsorption material, an adsorption device and a household appliance.

Background

With the development of society, the heat preservation and the sealing performance of buildings are higher and higher, and although the purpose of saving heating or refrigerating energy consumption can be achieved by preventing the outdoor supercooled or overheated air from influencing the indoor proper temperature, the indoor ventilation is also seriously influenced. The concentration of carbon dioxide in the enclosed space is constantly increasing due to the respiration of people and the like. Researches show that when the concentration of carbon dioxide is more than 2000ppm, people can have symptoms of carbon dioxide poisoning such as dizziness, thought retardation and the like. The national Standard "indoor air quality Standard" (GB/T18883-2002) states that the concentration of carbon dioxide in indoor air should not exceed 1000 ppm.

At present, amine substances are generally adopted to adsorb carbon dioxide in air, and the adsorbed carbon dioxide and the amine substances are desorbed in a heating mode to regenerate the amine substances. However, in the current regeneration mode, the amine substances are heated unevenly, and the amine substances can be damaged permanently due to local overhigh heat.

Disclosure of Invention

The application provides a can palingenetic adsorption material, adsorption equipment and domestic appliance, can make amine material be heated evenly in heating regeneration process.

In order to solve the technical problem, the application adopts a technical scheme that: providing a regenerable adsorbent material comprising: the mixed amine substances and the magnetic conductive substances are uniformly distributed in the adsorption material; the amine substance is used for adsorbing carbon dioxide in the air, and the magnetic conductive substance is used for heating the amine substance under the action of the alternating magnetic field, so that the adsorbed carbon dioxide is desorbed from the amine substance.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is an adsorption apparatus including: an adsorbent assembly comprising a housing and the adsorbent material of any of the above embodiments located within the housing, wherein the housing comprises first and second oppositely disposed ends and a sidewall located between the first and second ends; and the heating assembly comprises a coil and is wound on the periphery of the side wall of the shell.

In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a domestic appliance comprising a suction device as described in any one of the above embodiments.

Being different from the prior art situation, the beneficial effect of this application is: the regenerable adsorbing material provided by the application comprises mixed amine substances and magnetic conductive substances, and the magnetic conductive substances are uniformly distributed in the adsorbing material. The amine substance can adsorb carbon dioxide in air, and the magnetic conductive substance can heat the amine substance under the action of the alternating magnetic field, so that the adsorbed carbon dioxide is desorbed from the amine substance. On the one hand, because magnetic conduction material evenly distributed in adsorption material, can be so that the temperature deviation between the adsorption material in different regions is less, it is even to be heated between the adsorption material in different regions, reduces the too high situation that leads to permanent damage amine material of local heat, promotes adsorption material's efficiency and stability, and prolongs adsorption material's life. On the other hand, the mode of utilizing electromagnetic induction heating has the advantage that the heating rate is high, and because the amine substances are directly heated by the magnetic conductive substances, the energy utilization rate is very high, and the purpose of saving energy can be realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic structural diagram of an embodiment of an adsorption apparatus according to the present application.

Detailed Description

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

In order to solve the problem that the amine substances are heated unevenly in the conventional regeneration mode, the application firstly improves the reproducible adsorption material. Specifically, the adsorption material provided by the application comprises an amine substance and a magnetic conductive substance which are mixed, wherein the magnetic conductive substance can be uniformly distributed in the adsorption material; the magnetic conductive substance is used for heating the amine substance under the action of the alternating magnetic field, so that the adsorbed carbon dioxide is desorbed from the amine substance. Of course, the amine substances can absorb carbon dioxide in the air, and can also absorb sulfur dioxide and the like in the air.

On the one hand, because magnetic conduction material evenly distributed in adsorption material, can be so that the temperature deviation between the adsorption material in different regions is less, it is even to be heated between the adsorption material in different regions, reduces the too high situation that leads to permanent damage amine material of local heat, promotes adsorption material's efficiency and stability, and prolongs adsorption material's life. On the other hand, the mode of utilizing electromagnetic induction heating has the advantage that the heating rate is high, and because the amine substances are directly heated by the magnetic conductive substances, the energy utilization rate is very high, and the purpose of saving energy can be realized.

In one embodiment, the amine substance includes solid amine, and the magnetic conductive substance includes at least one of metal and graphite, and the metal may be at least one of iron, nickel and copper. Wherein the solid amine comprises at least one of resin formed by chloromethylating polystyrene and grafting diethylenetriamine or triethylenetetramine, fumed silica (or precipitated silica) loaded Polyethyleneimine (PEI) and Tetraethylenepentamine (TEPA). The solid amine has better thermal stability, and when the solid amine and the magnetic conductive substance are uniformly mixed to form the granular adsorption material, the adsorption material is easily and uniformly dispersed with the magnetic conductive substance. The magnetic conductive substance has high thermal conductivity, and can rapidly conduct heat to the surrounding solid amine so as to realize rapid heating of the solid amine and improve the regeneration efficiency.

In another embodiment, the adsorbing material may further include a binder, which may be an organic material such as epoxy resin, or an inorganic material such as kaolin or attapulgite, in addition to the amine-based material and the magnetic conductive material, and may bind the amine-based material and the magnetic conductive material together. Wherein, the mass of the amine substance accounts for 45-90% (e.g. 50%, 60%, 70%, 80%, etc.) of the total mass of the adsorbing material, the mass of the magnetic conductive substance accounts for 5-30% (e.g. 10%, 20%, etc.) of the total mass of the adsorbing material, and the mass of the binder accounts for 5-25% (e.g. 10%, 15%, 20%, etc.) of the total mass of the adsorbing material. The adhesive can enable the amine substance and the magnetic substance to be combined more tightly; and the setting of the proportion range can balance the adsorption capacity and the regeneration speed of the adsorption material.

Further, the mass of the amine-based substance accounts for 65% to 85% (e.g., 68%, 73%, 83%, etc.) of the total mass of the adsorbent, the mass of the magnetically permeable substance accounts for 10% to 20% (e.g., 12%, 14%, etc.) of the total mass of the adsorbent, and the mass of the binder accounts for 5% to 15% (e.g., 8%, 12%, etc.) of the total mass of the adsorbent. The proportion range is set to enable the adsorption capacity and the regeneration speed of the adsorption material to reach an optimal balance state.

In another embodiment, the adsorbent is in the form of particles made of an amine-based substance and a magnetically permeable substance, or the adsorbent is in the form of particles made of an amine-based substance, a magnetically permeable substance and a binder. The length of the adsorbent material is 1-20mm (e.g., 5mm, 10mm, 15mm, etc.), and the diameter or side length of the cross section of the adsorbent material perpendicular to its length is 1-5mm (e.g., 2mm, 4mm, etc.). The adsorbent material may be cylindrical, prismatic, or the like. The design mode of above-mentioned size scope can make adsorbing material form when adsorbing the subassembly in certain casing filling, can form a plurality of gas passage between the adsorbing material, and gas can move to the air outlet from the air intake comparatively easily, and the windage is less.

Preferably, the adsorbent material is in the form of particles, the length of the adsorbent material is in the range of 2-3.5mm (e.g., 2.5mm, 3mm, etc.), and the diameter or side length of the cross section of the adsorbent material perpendicular to the length of the adsorbent material is in the range of 3-10mm (e.g., 5mm, 7mm, etc.).

In a specific embodiment, the process for preparing the adsorbing material may be: after solid amine powder, magnetic powder and a binder are uniformly mixed according to a certain mass ratio, an extruder molding device is adopted to prepare the adsorbing materials with various forms such as a cylindrical form, a prismatic form and the like.

The structure of an adsorption apparatus comprising the adsorbent material of any of the above embodiments is described below. Specifically, referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an adsorption apparatus according to the present application. The adsorption device comprises: an adsorption component 10 and a heating component 12. Specifically, the adsorbent assembly 10 comprises a housing 100 and the adsorbent material 102 of any of the above embodiments located inside the housing 100, wherein the housing 100 comprises a first end 1000 and a second end 1002 disposed opposite one another, and a sidewall 1004 located between the first end 1000 and the second end 1002, wherein air can flow from the first end 1000 to the second end 1002 of the housing 100. The heating assembly 12 includes a coil 120, and the coil 120 is disposed around the periphery of the sidewall 1004 of the housing 100. Of course, the heating assembly 12 may also include a power source (not shown) electrically connected to the coil 120 for providing alternating current to the coil 120.

The working modes of the adsorption device comprise an adsorption mode and a regeneration mode; when the adsorption device is in the adsorption mode, no alternating current flows through the coil 120, air flows from the first end 1000 to the second end 1002 of the housing 100, and carbon dioxide in the air is adsorbed by the adsorbent material 102; when the adsorption device is in the regeneration mode, an alternating current flows through the coil 120 to generate an alternating magnetic field, and the magnetic conductive substance heats the amine substance, so that the adsorbed carbon dioxide is desorbed from the amine substance. On the one hand, because magnetic conduction material evenly distributed can be so that the temperature deviation between the adsorbing material 102 of different regions is less, be heated evenly between the adsorbing material 102 of different regions, reduce the too high situation that leads to permanent damage amine substance of local heat, promote the efficiency and the stability of adsorbing material 102, and prolong the life of adsorbing material 102. On the other hand, the mode of utilizing electromagnetic induction heating has the advantage that the heating rate is high, and because the amine substances are directly heated by the magnetic conductive substances, the energy utilization rate is very high, and the purpose of saving energy can be realized.

In one embodiment, with continued reference to fig. 1, the adsorption device provided herein further includes a controller (not shown) and at least one thermocouple 14. Specifically, the controller is electrically connected to the heating assembly 12; the thermocouple 14 is electrically connected with the controller and is positioned at the first end 1000 and/or the second end 1002 of the shell 100 and used for detecting the temperature at the corresponding position; wherein when the adsorption apparatus is in the regeneration mode, in response to the temperature detected by any one of the thermocouples 14 exceeding a maximum threshold, the controller turns off the heating assembly 12, i.e., the heating assembly 12 is temporarily stopped; in response to the temperature sensed by thermocouple 14 falling below a minimum threshold, the controller turns heating assembly 12 on. Through the design mode, the amine substances can be always in the optimal desorption condition between the minimum threshold and the maximum threshold in the regeneration process of the adsorption device, so that the desorption efficiency is improved.

For example, as shown in fig. 1, the adsorption device includes a front thermocouple 14a and a back thermocouple 14b, the front thermocouple 14a being located at the first end 1000 of the housing 100, the back thermocouple 14b being located at the second end 1002 of the housing 100; if the detected temperature of any one of the front-end thermocouple 14a or the rear-end thermocouple 14b is higher than 100 ℃, the heating assembly 12 is closed for over-temperature protection; if the highest temperature one of the front thermocouple 14a and the rear thermocouple 14b is below 80 ℃, the heating assembly 12 is turned back on. Therefore, the temperature of the amine substances can be always kept at the optimal desorption condition of 80-100 ℃.

Further, referring to fig. 1 again, the adsorption apparatus further includes an air inlet duct 16, an air outlet duct 18, an on-off valve 11, a regeneration exhaust duct 13, and a vacuum pump 15. Specifically, the intake duct 16 communicates with a first end 1000 of the housing 100 and has an intake opening 160; the air outlet duct 18 is communicated with the second end 1002 of the shell 100 and is provided with an air outlet 180; the on-off valve 11 is located on the air outlet pipe 18 and is used for being opened when the adsorption device is in the adsorption mode and being closed when the adsorption device is in the regeneration mode, in this embodiment, the on-off valve 11 can be connected with a controller, and the state of the on-off valve 11 is controlled by the controller. The regeneration exhaust conduit 13 communicates with the second end 1002 of the housing 100. A vacuum pump 15 is located on the regeneration exhaust line 13 for operation when the adsorption apparatus is in the regeneration mode. In this embodiment, the working process of the adsorption device may be as follows:

when the operation mode of the adsorption device is the adsorption mode, the on-off valve 11 is opened, the heating assembly 12 does not work, and the vacuum pump 15 does not work. Air with high concentration carbon dioxide in the room enters the shell 100 from the air inlet 160 of the air inlet pipeline 16, and the carbon dioxide in the air is adsorbed by the adsorbing material 102 in the shell 100; the rest air is discharged back to the room through the air outlet 180 after passing through the cut-off valve 11, so that the concentration of the carbon dioxide in the room can be continuously reduced.

When the working mode of the adsorption device is a regeneration mode, the on-off valve 11 is closed, the heating assembly 12 works, the vacuum pump 15 works, and the vacuum pump 15 can continuously discharge the desorbed carbon dioxide gas to the outdoor through a regeneration exhaust pipeline. In addition, the vacuum pump 15 can suck the desorbed carbon dioxide, and can also provide a negative pressure to the inside of the housing 100 to accelerate the desorption process of the carbon dioxide.

In addition, in order to improve the adsorption efficiency of the adsorption apparatus, the adsorption apparatus may further include a blower 17 disposed near the air inlet 160 or the air outlet 180 to accelerate the air from the air inlet 160 to the air outlet 180. The fan 17 may be a conventional centrifugal fan or the like.

In addition, in order to make the operation of the adsorption apparatus more intelligent, the adsorption apparatus may further include a carbon dioxide sensor 19 disposed near the air outlet 180 and/or the air inlet 160, that is, the carbon dioxide sensor 19 may be disposed near the air outlet 180, near the air inlet 160, or near both the air outlet 180 and the air inlet 160. The carbon dioxide sensor 19 is mainly used for detecting the concentration of carbon dioxide at the corresponding position. The carbon dioxide sensor 19 is connected with the controller and transmits the detected carbon dioxide concentration to the controller in real time; when the controller judges that the concentration of the carbon dioxide at the current position of the carbon dioxide sensor 19 does not continuously decrease or decreases below a preset value, the controller controls the adsorption device to enter a regeneration mode.

Preferably, as shown in fig. 1, the air outlet duct 18 may include a first sub air outlet duct 182 and a second sub air outlet duct 184 which are communicated with each other, and the first sub air outlet duct 182 is close to the housing 100 relative to the second sub air outlet duct 184. The on-off valve 11 may be located on the first sub air-out pipeline 182, the blower 17 is located between the first sub air-out pipeline 182 and the second sub air-out pipeline 184, and the carbon dioxide sensor 19 is located in the second sub air-out pipeline 184. The regeneration exhaust duct 13 may communicate with a side wall of the first sub air-out duct 182, and thus with the second end 1002 of the casing 100.

In another embodiment, with continued reference to fig. 1, a plurality of partitions 1006 are disposed inside the casing 100 to divide the inside of the casing 100 into a plurality of independent areas; wherein, the plurality of baffles 1006 may divide the interior of the housing 100 into a plurality of regions of the same volume; for example, the plurality of spacers 1006 may be equally spaced from top to bottom. The partition plate 1006 is designed in such a way that the amine substances accumulated inside the casing 100 are more uniform in the gravity direction.

In this embodiment, the partition plate 1006 may be made of a magnetic conductive material, and in this case, the adsorbing material 102 filled in the casing 100 may be formed by uniformly mixing an amine-based material, a magnetic conductive material, and a binder. Alternatively, the magnetic conductive substance in the adsorbent 102 is the plurality of separators 1006, and the amine-based substance in the adsorbent 102 is granulated alone or mixed with a binder. The partition 1006 in the above design can generate heat under the action of the heating assembly 12 and conduct the heat to the amine substance accumulated above the partition, so as to accelerate the regeneration process of the amine substance.

Preferably, in the present embodiment, the extending direction of the partition 1006 may be the same as the extending direction from the air inlet 160 to the air outlet 180, so as to reduce the wind resistance.

In addition, the volume filling degree of the amine-based substance in each region is 20% to 100%, for example, 30%, 50%, 80%, etc. Preferably, the amine-based material in each region has a volume filling of 55% to 85%, e.g., 60%, 70%, etc. If the volume filling degree of the amine substance in each region is too small, the adsorption capacity of the adsorption device is reduced; on the contrary, the wind resistance of the air flowing through is increased, and the adsorption effect of the adsorption device is also influenced. The design range of the volume filling degree can enable the adsorption capacity and the wind resistance of the adsorption device to be balanced.

The adsorption device may be used alone or in combination with an existing electric appliance such as an air conditioner. For example, when the household appliance comprises an air conditioner, the air can be exhausted only by utilizing a little space left at the position where the refrigerant pipe of the existing air conditioner is communicated with the outside, and the regeneration exhaust pipeline 13 of the adsorption device is communicated with the outside through the left position, so that excessive heat exchange with the outside is avoided, and energy is effectively saved.

The above embodiments are merely examples, and not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure, or their direct or indirect application to other related arts, are included in the scope of the present disclosure.

Claims

1. A regenerable adsorbent material comprising:

the mixed amine substances and the magnetic conductive substances are uniformly distributed in the adsorption material; the amine substance is used for adsorbing carbon dioxide in the air, and the magnetic conductive substance is used for heating the amine substance under the action of the alternating magnetic field, so that the adsorbed carbon dioxide is desorbed from the amine substance.

2. The adsorbent material according to claim 1,

the amine substance comprises solid amine, and the magnetic conductive substance comprises at least one of metal and graphite.

3. The adsorbent material according to claim 1,

the adsorption material also comprises a binder, wherein the mass of the amine substance accounts for 45-90% of the total mass of the adsorption material, the mass of the magnetic conductive substance accounts for 5-30% of the total mass of the adsorption material, and the mass of the binder accounts for 5-25% of the total mass of the adsorption material.

4. The adsorbent material according to claim 1,

the adsorption material is granular, the length of the adsorption material is 1-20mm, and the diameter or the side length of the cross section of the adsorption material in the direction perpendicular to the length direction of the adsorption material is 1-5 mm.

5. An adsorption device, comprising:

a sorbent assembly comprising a housing and the sorbent material of any of claims 1-4 positioned within the housing, wherein the housing comprises first and second oppositely disposed ends and a sidewall positioned between the first and second ends;

and the heating assembly comprises a coil and is wound on the periphery of the side wall of the shell.

6. The sorption arrangement of claim 5, further comprising:

a controller electrically connected to the heating assembly;

at least one thermocouple electrically connected to the controller, located at the first end and/or the second end, for detecting a temperature at a corresponding location;

wherein the controller turns off the heating assembly in response to a temperature detected by any of the thermocouples exceeding a maximum threshold while the sorption device is in a regeneration mode; the controller turns on the heating assembly in response to the thermocouple detected temperatures all being below a minimum threshold.

7. The sorption arrangement of claim 5, further comprising:

the air inlet pipeline is communicated with the first end and is provided with an air inlet;

the air outlet pipeline is communicated with the second end and is provided with an air outlet;

the on-off valve is positioned on the air outlet pipeline and used for being opened when the adsorption device is in an adsorption mode and being closed when the adsorption device is in a regeneration mode;

a regeneration exhaust conduit in communication with the second end;

and the vacuum pump is positioned on the regeneration exhaust pipeline and is used for working when the adsorption device is in a regeneration mode.

8. The sorption arrangement of claim 5, further comprising:

the fan is arranged close to the air inlet or the air outlet; and/or the presence of a gas in the gas,

and the carbon dioxide sensor is arranged close to the air outlet and/or the air inlet and is used for detecting the concentration of carbon dioxide at the corresponding position.

9. The adsorption device of claim 5,

the shell is internally provided with a plurality of partition plates so as to divide the interior of the shell into a plurality of independent areas.

10. The adsorption device of claim 9,

the magnetic conductive substance in the adsorption material is the plurality of partition plates.

11. The adsorption device of claim 9,

the volume filling degree of the amine substances in each region is 55-85%.

12. A household appliance comprising a sorption arrangement according to any one of claims 5 to 11.