阅读说明：本技术 利用沸石进行余热储运与利用的方法及其系统 (Method and system for storing, transporting and utilizing waste heat by utilizing zeolite ) 是由 王大滨 于 2019-09-19 设计创作，主要内容包括：本发明涉及一种利用沸石进行余热储运与利用的方法及其系统,属于余热利用领域。热源处的余热通过高温烟气/蒸汽管道进入换热器中,通过间接换热加热空气,空气随后进入蓄热器中加热沸石,使沸石再生,从而将热能储存到沸石中。热源和热用户处通过交通工具衔接以实现沸石的转运。热用户处增设一个沸石锅炉,从锅炉中加热后的少量蒸汽进入沸石锅炉中与沸石接触,沸石吸收蒸汽放出大量热,利用放出的这部分热量间接加热进入沸石锅炉的给水。本方案实现了钢厂、电厂或石油化工等工业生产中低品位余热的储运及利用,降低了现有锅炉的能源消耗量。(the invention relates to a method and a system for storing, transporting and utilizing waste heat by utilizing zeolite, belonging to the field of waste heat utilization. The waste heat at the heat source enters the heat exchanger through a high-temperature flue gas/steam pipeline, air is heated through indirect heat exchange, and then the air enters the heat accumulator to heat the zeolite, so that the zeolite is regenerated, and the heat energy is stored in the zeolite. The heat source and the heat user are engaged by a vehicle to effect the transport of the zeolite. A zeolite boiler is additionally arranged at a heat user position, a small amount of steam heated from the boiler enters the zeolite boiler to be contacted with zeolite, the zeolite absorbs the steam to release a large amount of heat, and the released heat is utilized to indirectly heat feed water entering the zeolite boiler. The scheme realizes storage, transportation and utilization of low-grade waste heat in industrial production of steel mills, power plants, petrochemical industry and the like, and reduces the energy consumption of the existing boiler.)

1. A method for carrying out storage, transportation and utilization of waste heat by utilizing zeolite is characterized by sequentially comprising the following steps:

(1) High-temperature flue gas or steam at the heat source is sent into a heat exchanger to exchange heat with air entering the heat exchanger, and the air is heated and heated;

(2) Feeding the heated air into a heat accumulator, and regenerating/drying the zeolite in the heat accumulator by hot air;

(3) Passing the regenerated/dried zeolite through a vehicle to a zeolite boiler at a hot user;

(4) Respectively feeding steam and feed water into the zeolite boiler, wherein the steam is directly contacted with zeolite in the zeolite boiler, the zeolite absorbs the steam to release heat, the zeolite absorbs the heat released by the steam to heat the feed water, and the feed water is heated or changed into steam to be supplied to a heat user;

(5) The exothermic zeolite is sent from the zeolite boiler and then returned to the regenerator by a vehicle.

2. the method for storing, transporting and utilizing waste heat by using zeolite according to claim 1, wherein the method comprises the following steps: a boiler is additionally arranged at a heat user position to divide feed water into two paths, one path of feed water is sent into the boiler to be heated into steam and then is sent into the zeolite boiler to be directly contacted with zeolite, and the other path of feed water is directly sent into the zeolite boiler to be indirectly exchanged heat with heat released by the zeolite absorbing the steam.

3. The method for storing, transporting and utilizing waste heat by using zeolite as claimed in claim 2, wherein: and a steam distributor is arranged, steam sent out by the boiler firstly passes through the steam distributor and then is sent into the zeolite boiler, and steam sent out by the zeolite boiler passes through the steam distributor and then is sent to a heat user.

4. A system for carrying out storage, transportation and utilization of waste heat by utilizing zeolite is characterized in that: the heat-storage type zeolite boiler comprises a heat exchanger, a heat accumulator, a zeolite boiler and a boiler; the heat accumulator and the heat exchanger are arranged at a heat source, the heat exchanger is correspondingly communicated with a high-temperature flue gas/steam pipeline and an air pipeline, the heat source is connected with the heat exchanger through the high-temperature flue gas/steam pipeline, and the outlet end of the air pipeline is communicated with the heat accumulator; the zeolite boiler and the boiler are arranged at a hot user, the boiler is connected with a water supply pipeline I and a steam pipeline I, the outlet end of the steam pipeline I is connected to a steam inlet of the zeolite boiler, the outlet end of the water supply pipeline II is connected to a water supply inlet of the zeolite boiler, a steam outlet of the zeolite boiler is connected with a steam conveying pipe, and the steam conveying pipe is communicated to the hot user; the heat accumulator is connected with the zeolite boiler through a vehicle.

5. The system for storing, transporting and utilizing waste heat by using zeolite as claimed in claim 4, wherein: the zeolite boiler comprises a furnace shell and a water supply pipe section arranged in the inner cavity of the furnace shell; the inner cavity of the furnace shell is divided into two areas by a water supply pipe section, wherein the water supply pipe section is internally provided with a water supply heat absorption area, and the water supply pipe section is externally provided with a zeolite heat release area; the inlet end of the water supply pipe section extends out of the furnace shell to be used as a water supply inlet, and the outlet end of the water supply pipe section extends out of the furnace shell to be used as a steam outlet.

6. The system for storing, transporting and utilizing waste heat by using zeolite as claimed in claim 5, wherein: the top of the furnace shell of the zeolite boiler is provided with a zeolite inlet, the bottom of the furnace shell is provided with a zeolite outlet, the feed water inlet is arranged at the lower part of the furnace shell, and the steam outlet is arranged at the upper part of the furnace shell.

7. the system for carrying out waste heat storage, transportation and utilization by utilizing zeolite according to any one of claims 5 to 6, wherein: and a zeolite container is respectively and correspondingly arranged at a zeolite inlet and a zeolite outlet which are arranged on the heat accumulator and at a zeolite inlet and a zeolite outlet which are arranged on a furnace shell of the zeolite boiler.

8. The system for carrying out waste heat storage, transportation and utilization by utilizing zeolite according to any one of claims 4 to 6, wherein: the zeolite boiler further comprises a steam distributor, the steam pipeline I is connected with a steam inlet of the zeolite boiler after passing through the steam distributor, and a steam conveying pipe is communicated to a heat user after passing through the steam distributor.

9. The system for storing, transporting and utilizing waste heat using zeolite of claim 8, wherein: the heat exchanger is a plate heat exchanger or a shell-and-tube heat exchanger.

10. The system for storing, transporting and utilizing waste heat using zeolite of claim 8, wherein: the interior of the heat accumulator is of a honeycomb type or partition plate type or fence type structure.

Technical Field

The invention belongs to the field of waste heat utilization, and particularly relates to a method and a system for carrying out waste heat storage, transportation and utilization by utilizing zeolite.

Background

in industrial production such as steel mill, power plant or petrochemical industry, there is often a large amount of low-grade waste heat to exist, and these waste heat exist in the form of flue gas or steam, and the diffusion of these waste heat can cause a large amount of energy loss, if can carry out effective utilization to these waste heat, then can practice thrift a large amount of energy costs for the enterprise annually. In the actual production process, the residual heat in the form of flue gas or steam can satisfy most of industrial production heat supply and resident life heat supply. The problem that is often encountered in the process of waste heat utilization is that seasonal periodicity exists in heat supply demands of industrial production and resident life, and heat users are dispersed and far away from a heat source. If the heat supply pipelines are independently constructed for the heat users, the heat supply cost is high; the long-distance transportation of the heat medium by using the pipeline also causes a problem of large heat dissipation loss.

Zeolite is a hydrous alkali metal or alkaline earth metal aluminosilicate mineral, is easy to obtain, has low cost, is widely used in the fields of industry, agriculture and the like, and has the characteristics of removing internal crystal water after being heated and then releasing heat when meeting water or water vapor. The problem can be solved by adopting zeolite for waste heat storage, but no corresponding storage, transportation and utilization system exists at present.

disclosure of Invention

In view of the above, the present invention provides a method and a system for storing, transporting and utilizing waste heat generated in steel plant, power plant or petrochemical production process by using zeolite, so as to solve the problem that the waste heat is not effectively utilized.

In order to achieve the purpose, the invention provides the following technical scheme:

A method for carrying out storage, transportation and utilization of waste heat by utilizing zeolite sequentially comprises the following steps:

(1) high-temperature flue gas or steam at the heat source is sent into a heat exchanger to exchange heat with air entering the heat exchanger, and the air is heated and heated;

(2) Feeding the heated air into a heat accumulator, and regenerating/drying the zeolite in the heat accumulator by hot air;

(3) Passing the regenerated/dried zeolite through a vehicle to a zeolite boiler at a hot user;

(4) Respectively feeding steam and feed water into the zeolite boiler, wherein the steam is directly contacted with zeolite in the zeolite boiler, the zeolite absorbs the steam to release heat, the zeolite absorbs the heat released by the steam to heat the feed water, and the feed water is heated or changed into steam to be supplied to a heat user;

(5) the exothermic zeolite is sent from the zeolite boiler and then returned to the regenerator by a vehicle.

Furthermore, a boiler is additionally arranged at a heat user position to divide the feed water into two paths, one path of the feed water is sent into the boiler to be heated into steam and then is sent into the zeolite boiler to be directly contacted with zeolite, and the other path of the feed water is directly sent into the zeolite boiler to be indirectly subjected to heat exchange with the heat released by the zeolite absorbing the steam.

furthermore, a steam distributor is arranged, steam sent out by the boiler firstly passes through the steam distributor and then is sent into the zeolite boiler, and the steam sent out by the zeolite boiler passes through the steam distributor and then is sent to a heat user.

A system for storing, transporting and utilizing waste heat by utilizing zeolite comprises a heat exchanger, a heat accumulator, a zeolite boiler and a boiler; the heat accumulator and the heat exchanger are arranged at a heat source, the heat exchanger is correspondingly communicated with a high-temperature flue gas/steam pipeline and an air pipeline, the heat source is connected with the heat exchanger through the high-temperature flue gas/steam pipeline, and the outlet end of the air pipeline is communicated with the heat accumulator; the zeolite boiler and the boiler are arranged at a hot user, the boiler is connected with a water supply pipeline I and a steam pipeline I, the outlet end of the steam pipeline I is connected to a steam inlet of the zeolite boiler, the outlet end of the water supply pipeline II is connected to a water supply inlet of the zeolite boiler, a steam outlet of the zeolite boiler is connected with a steam conveying pipe, and the steam conveying pipe is communicated to the hot user; the heat accumulator is connected with the zeolite boiler through a vehicle.

Further, the zeolite boiler comprises a furnace shell and a water supply pipe section arranged in the inner cavity of the furnace shell; the inner cavity of the furnace shell is divided into two areas by a water supply pipe section, wherein the water supply pipe section is internally provided with a water supply heat absorption area, and the water supply pipe section is externally provided with a zeolite heat release area; the inlet end of the water supply pipe section extends out of the furnace shell to be used as a water supply inlet, and the outlet end of the water supply pipe section extends out of the furnace shell to be used as a steam outlet.

furthermore, a zeolite inlet is arranged at the top of a furnace shell of the zeolite boiler, a zeolite outlet is arranged at the bottom of the furnace shell, a water supply inlet is arranged at the lower part of the furnace shell, and a steam outlet is arranged at the upper part of the furnace shell.

further, a zeolite container is respectively and correspondingly arranged at a zeolite inlet and a zeolite outlet which are arranged on the heat accumulator and at a zeolite inlet and a zeolite outlet which are arranged on the furnace shell of the zeolite boiler.

Further, the steam pipeline I is connected with a steam inlet of the zeolite boiler after passing through the steam distributor, and a steam conveying pipe is communicated to a heat user after passing through the steam distributor.

Further, the heat exchanger is a plate heat exchanger or a shell-and-tube heat exchanger.

Furthermore, the interior of the heat accumulator is of a honeycomb type or partition plate type or fence type structure.

the invention has the beneficial effects that:

(1) The system has simple structure, small occupied area, high heat exchange efficiency and flexible working condition adjustment.

(2) The combination of the zeolite boiler and the (conventional) boiler is realized, the storage, transportation and utilization of low-grade waste heat in industrial production of steel mills, power plants, petrochemical industry and the like can be realized on the premise of not influencing the heat supply of the conventional boiler to heat users, and compared with the mode of directly generating steam through the (conventional) boiler to supply heat users, the energy consumption is reduced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a system;

FIG. 2 is a schematic view of a zeolite boiler and piping connections.

reference numerals:

The system comprises a heat source-1, a heat exchanger-2, a heat accumulator-3, a vehicle-4, a zeolite boiler-5, a heat user-6, a boiler-7, a high-temperature flue gas/steam pipeline-8, an air pipeline-9, a water supply pipeline-10, a steam pipeline-11, a water supply pipeline-12, a steam conveying pipe-13, a water supply pump-14, a zeolite container-15, a steam distributor-16, a zeolite inlet-301, a zeolite outlet-302, a furnace shell-501, a water supply pipe section-502, a zeolite inlet-503 and a zeolite outlet-504.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 2, a method for storing, transporting and utilizing residual heat by using zeolite sequentially comprises the following steps:

(1) high-temperature flue gas or steam at the heat source 1 is sent into the heat exchanger 2 to exchange heat with air entering the heat exchanger 2, and the air is heated and heated;

(2) Feeding the heated air into the heat accumulator 3, and regenerating/drying the zeolite in the heat accumulator by hot air;

(3) The regenerated/dried zeolite is sent to a zeolite boiler 5 at the site of a hot user by means of a vehicle 4;

(4) Feeding steam and feed water into the zeolite boiler 5 respectively, wherein the steam is in direct contact with zeolite in the zeolite boiler 5, the zeolite absorbs the steam to release heat, the zeolite absorbs the heat released by the steam to heat the feed water, and the feed water is heated or changed into steam to be supplied to a heat consumer 6;

(5) The heat released zeolite is sent out from the zeolite boiler and then sent back to the heat accumulator 3 at the heat source 1 through the vehicle 4, so as to realize cyclic utilization.

In the step (4), a (conventional) boiler 7 arranged at a heat consumer 6 can be utilized, namely, the feed water fed into the (conventional) boiler 7 is divided into two paths, one path is fed into the boiler 7 to be heated and vaporized, then the vaporized steam is conveyed into the zeolite boiler 5 to be directly contacted with the regenerated/dried zeolite, and a large amount of heat is released after the zeolite is contacted with the steam and is used as a heat source for heating the feed water. The other path is directly sent into the zeolite boiler 5 to indirectly exchange heat with the heat released by the zeolite absorbing steam. Here, the heat released after the zeolite contacts the steam heats the feed water through indirect heat exchange, and the feed water can be heated into hot water or steam according to the heat supply demand to supply heat to users.

As a further optimization of the above solution, a steam distributor 16 may be provided, the steam sent from the (conventional) boiler 7 is sent to the zeolite boiler 5 after passing through the steam distributor 16, and the steam sent from the zeolite boiler 5 is sent to the heat consumer 6 after passing through the steam distributor 16. After steam generated by the boiler enters the steam distributor 16, the steam can be distributed according to different working conditions, when regenerated (dried) zeolite is sufficient, the steam generated by the boiler is in contact with the zeolite, the heat stored in the zeolite is utilized to meet the requirements of heat users, the required steam quantity is less at the moment, but the steam quantity can emit large amount of heat when the steam is in contact with the zeolite, the heat is used for heating up the feed water, the utilization of low-grade waste heat in industrial production of steel plants, power plants, petrochemical industry and the like is realized, and compared with the mode of directly generating steam through a (conventional) boiler to supply heat users', the energy consumption is reduced; if regenerated (dried) zeolite is not sufficient, and the steam is contacted with the zeolite at the moment and can not emit enough heat for heating the feed water, the steam generated by heating the boiler can be directly sent to a heat user to meet the requirement of the user, and the flexible adjustment of a heat supply system is realized.

A system for carrying out storage, transportation and utilization of waste heat by utilizing zeolite comprises a heat exchanger 2, a heat accumulator 3, a zeolite boiler 5 and a boiler 7; the heat accumulator 3 and the heat exchanger 2 are arranged at the heat source 1, the heat exchanger 2 is correspondingly communicated with a high-temperature flue gas/steam pipeline 8 and an air pipeline 9, the heat source 1 is connected with the heat exchanger 2 through the high-temperature flue gas/steam pipeline 8, and the outlet end of the air pipeline 9 is communicated with the heat accumulator 3; the zeolite boiler 5 and the boiler 7 are arranged at a hot user 6, the boiler 7 is connected with a water supply pipeline I10 and a steam pipeline I11, the outlet end of the steam pipeline I11 is connected with the steam inlet of the zeolite boiler 5, the outlet end of the water supply pipeline II 12 is connected with the water supply inlet of the zeolite boiler 5, the steam outlet of the zeolite boiler 5 is connected with a steam conveying pipe 13, and the steam conveying pipe 13 is communicated with the hot user 6; the heat accumulator 3 is connected with the zeolite boiler 5 through a vehicle 4.

Specifically, the waste heat (high-temperature flue gas or steam) at the heat source 1 enters the heat exchanger 2 through the high-temperature flue gas/steam pipeline 8, air is heated through indirect heat exchange, and then the air enters the heat accumulator 3 to heat the zeolite, so that the zeolite is regenerated (dried), and the heat energy is stored in the zeolite. The heat source 1 and the heat consumer 6 are engaged by a vehicle 4 to effect the transport of the zeolite. A (conventional) boiler 7 is arranged at a heat user, a zeolite boiler 5 is additionally arranged, a part of feed water is fed into the boiler 7 through a feed water pump 14 to be heated into steam, and the other part of feed water is directly fed into the zeolite boiler 5; a small amount of steam heated from the boiler 7 enters the zeolite boiler 5 to contact with zeolite, the zeolite absorbs a large amount of heat released by the steam, and the released heat is used for indirectly heating feed water entering the zeolite boiler 5.

In the system, the heat exchanger 2 transfers the waste heat in the high-temperature flue gas or steam at the heat source to the air through heat exchange, and the hot air regenerates (dries) the zeolite; the zeolite absorbing the steam and releasing the heat in the zeolite boiler 5 is transported back to a heat source through a vehicle 4, and the zeolite absorbing the steam is directly contacted with hot air in the heat accumulator 3, so that the moisture in the zeolite is removed, and the regeneration is realized; namely, the storage, transportation and utilization of low-grade waste heat are realized through the cyclic utilization of zeolite.

the zeolite is transported to and from the heat accumulator and the zeolite boiler by a vehicle 4, and the vehicle 4 is determined according to actual requirements and can be an automobile, a train, a ship and the like.

it should be noted that: the feed water directly fed into the zeolite boiler 5 through the feed water pipe ii 12 is heated, and the feed water may be heated as hot water or steam according to the demand of the user.

In the system, the zeolite boiler 5 comprises a furnace shell 501 and a water supply pipe section 502 arranged in the inner cavity of the furnace shell 501; the inner cavity of the furnace shell is divided into two areas by a water supply pipe section, wherein the water supply pipe section is internally provided with a water supply heat absorption area, and the water supply pipe section is externally provided with a zeolite heat release area; the inlet end of the feedwater section 502 extends out of the furnace shell 501 as a feedwater inlet, and the outlet end of the feedwater section 502 extends out of the furnace shell 501 as a steam outlet. The feed water inlet is connected with the outlet end of a feed water pipeline II 12, and the steam outlet is connected with a steam conveying pipe 13. The zeolite boiler 5 is divided into two areas of a zeolite heat release area and a feedwater heat absorption area, so that the contact heat release of zeolite and steam and the heating and temperature rise of the feedwater by the released heat can be simultaneously met. The zeolite in the zeolite boiler is positioned in the heat release area, the dried zeolite is directly contacted with water vapor to release heat, and the released heat is transferred to the feed water in the feed water heat absorption area through indirect heat exchange.

In the zeolite boiler of this embodiment, the zeolite inlet is disposed at the top of the furnace shell, the zeolite outlet is disposed at the bottom of the furnace shell, the feed water inlet is disposed at the lower portion of the furnace shell, and the steam outlet is disposed at the upper portion of the furnace shell. The zeolite enters through a zeolite inlet 503 on the furnace shell 501 and then is sent out from a zeolite outlet 504; the feedwater enters from the feedwater inlet through the feedwater pipe ii 12, the feedwater having absorbed heat becomes steam and flows out from the steam outlet at the upper end, and the steam generated in the boiler 7 enters from the steam inlet at the upper part of the furnace casing 501 and directly contacts the zeolite. The purpose of setting up like this is let zeolite and feedwater realize indirect heat transfer, improves heat exchange efficiency. Of course, the relative position between the zeolite heat release region and the feedwater heat absorption region and the arrangement structure of each inlet and outlet are not limited to this form, and other modifications are possible, such as zeolite bottom-in top-out, feedwater top-in bottom-out, and the like.

as a further optimization of the above solution, one zeolite container 15 is provided at each of the zeolite inlet 301 and the zeolite outlet 302 provided on the regenerator 3 and the zeolite inlet 503 and the zeolite outlet 504 provided on the shell of the zeolite boiler. Namely, the heat source 1 and the heat user 6 are respectively provided with two zeolite containers 15 for containing zeolite, and the empty/heavy zeolite containers 15 can be directly replaced after the vehicle is directly in place, so that the time is saved.

the embodiment also comprises a steam distributor 16, the steam pipeline I11 is connected with a steam inlet of the zeolite boiler 5 after passing through the steam distributor 16, and the steam conveying pipe 13 is communicated with the hot user 6 after passing through the steam distributor 16. By adjusting the steam distributor 16, the heat requirements under different operating conditions can be met. Steam that boiler 7 produced gets into steam distributor from steam conduit I11 after, distributes the back according to different operating modes to steam, and steam flows to the heat consumer from the steam conveying pipe.

Specifically, when the regenerated (dried) zeolite is sufficient, a small part of steam can be distributed through the steam distributor to enter the zeolite boiler, the steam is contacted with the zeolite, the heat stored in the zeolite is utilized to heat the temperature-rising feed water, and the heated feed water/steam is sent to a heat user, so that the use requirements of partial heat users are met, and at the moment, the capacity of the boiler 7 can be greatly reduced, so that the energy is saved. When regenerated (dried) zeolite is not sufficient, the steam can not contact with the zeolite to release enough heat for heating feed water, all the steam generated by heating the boiler can be directly sent to a heat user through a steam distributor to meet the use requirement of the user, and the boiler 7 recovers normal capacity. The combination of the zeolite boiler and the conventional boiler is realized, the utilization of low-grade waste heat can be realized on the premise of not influencing the heat supply of the conventional boiler to a heat user, and the energy consumption is reduced.

the heat exchanger transfers the waste heat in the high-temperature flue gas or steam at the heat source to the air through heat exchange, and can be a plate heat exchanger or a shell-and-tube heat exchanger and the like, and aims to reduce the floor area as much as possible while improving the heat exchange efficiency with the air.

The zeolite absorbing the steam directly contacts with hot air in the heat accumulator, so that the moisture in the zeolite is removed, and the regeneration is realized. The interior of the heat accumulator can be in any form of honeycomb type, partition plate type or barrier type, and the like, and aims to ensure that hot air can smoothly circulate and the hot air and zeolite have sufficient contact area, so that the regeneration (drying) efficiency of the zeolite is improved.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.