JP4627943B2 - Air purification device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an air purification device, and more particularly to an air purification device that produces clean air from which organic pollutants in the air have been removed and detoxifies the removed organic pollutants.
[0002]
[Prior art]
As an air purification device, a rotary rotor type adsorption concentrating device is conventionally known. This air purification apparatus includes, for example, a rotating rotor having adsorbability and air permeability that adsorbs organic pollutants, an adsorption region for passing the air to be processed through the rotating rotor, and a rotating rotor that passes the air to be processed in the adsorption region A regenerative region that regenerates the adsorption power of the rotary rotor by heating above the temperature at which organic contaminants are released from the revolving rotor, and a cooling region that cools the revolving rotor heated in the regenerative region, The air to be treated is continuously purified by moving through the adsorption region, the regeneration region, and the cooling region. In this air purification device, organic contaminants adsorbed on the rotary rotor in the adsorption region are released from the rotary rotor by heating in the regeneration region. Organic pollutants released from the rotating rotor are generally burned by a combustion device or decomposed in the presence of a catalyst.
[0003]
The above-described air purifier generally has a heating means for producing heated air for regeneration and the combustion device individually. As such an air purifier, for example, Japanese Patent Laid-Open No. 10-146514. An exhaust gas treatment device described in the publication can be cited. The publication describes a configuration in which combustion heat of the combustion device is recovered using a heat exchanger and used for heating the regeneration air, a configuration in which a part of the exhaust gas of the combustion device is circulated in the regeneration region, and the like. Such a configuration is advantageous in effectively utilizing the heat generated with the purification of the air to be treated.
[0004]
[Problems to be solved by the invention]
However, the above-described conventional air purification device has a rapid temperature change of the rotating rotor during regeneration or a large temperature difference of air during heat exchange of heat generated by the combustion device, which is entropy from a thermodynamic point of view. The increase is large, and there is still room for study in reducing the running cost by effectively utilizing the ability of thermal energy to work during air purification.
[0005]
This invention is made | formed in view of the said matter, and makes it a subject to suppress the increase in entropy which concerns on purification | cleaning of to-be-processed air, and to provide an air purification apparatus with few energy losses.
[0006]
[Means for Solving the Problems]
As a means for solving the above-mentioned problems, the present invention uses the heat of air heated to regenerate the adsorption force of the adsorption member to increase the temperature of the adsorption member before regeneration, thereby generating heat generated by the heating means. And an air purification device that suppresses a rapid temperature change during heat exchange in an adsorbing member or the like.
[0007]
That is, the air purification device of the present invention has an adsorbing member that adsorbs organic pollutants and an air permeability, an adsorbing region for passing the air to be treated through the adsorbing member, and the air to be treated in the adsorbing region. To regenerate the adsorption force of the adsorption member by heating the adsorption member heated to the temperature of the adsorption member, and heating the adsorption member heated in the temperature rise region to a temperature higher than the temperature at which the organic contaminant is released from the adsorption member And a cooling region for cooling the adsorption member heated in the regeneration region, and the adsorption member moves through the adsorption region, the temperature rising region, the regeneration region, and the cooling region. An air purification device for continuously purifying the air to be treated, wherein a purification air passage for passing the air to be treated through the adsorption region, a cooling region, a temperature raising region, and a regeneration region are connected in this order, and the air is disposed in the cooling region. Through the cooling area The air in the regeneration air passage that passes the air that has passed through the temperature rising region to the regeneration region and the air in the regeneration air passage that connects the temperature rising region and the regeneration region to a temperature higher than the temperature at which the organic pollutant is released from the adsorbing member. Heating means for heating, and a first heat exchanger for exchanging heat between the air before passing through the cooling region and passing through the temperature rising region and the air after passing through the regeneration region.
[0008]
According to the said structure, the rapid temperature change of an adsorption | suction member is suppressed from the time of adsorption | suction to the time of reproduction | regeneration, and increase of entropy is suppressed by the broad countercurrent heat exchange with an adsorption | suction member and air. In addition, the air in the regeneration ventilation path recovers heat from the regenerated adsorbing member in the cooling region, and further recovers the heat of the regenerated heated air by the first heat exchanger before passing through the temperature rising region. Since the temperature of the adsorption member is raised in the temperature increase region by the recovered heat, the effective use of heat by collecting the generated heat and the increase in entropy associated with the regeneration of the adsorption member are suppressed. Therefore, it is possible to suppress an increase in entropy related to the purification of the air to be treated and reduce energy loss.
[0009]
The first heat exchanger is not particularly limited as long as it performs heat exchange between the air that has passed through the regeneration region and the air that has not passed through the temperature rising region, and specifically, the cooling region. As long as heat exchange is performed between one or both of air before passing through the cooling region and air before passing through the cooling region and before passing through the temperature rising region, and air that has passed through the regeneration region However, since it is preferable to perform heat exchange between air having a smaller temperature difference in order to suppress an increase in entropy, the air after passing through the regeneration region and before passing through the cooling region and the temperature rising region. It is preferable to perform heat exchange with the air.
[0010]
Further, each of the regions may be a region where contact between any air to be introduced and the adsorbing member is performed, and for example, such an area may include all or part of the adsorbing member in a state where the adsorbing member is movable. The covering casing, a plurality of vent holes formed in the casing, and a partition plate that partitions the space between the adsorption member and the casing in the casing corresponding to the vent holes.
[0011]
In the present invention, a configuration that is more effective in suppressing entropy increase and reducing energy loss can be realized by the configuration of the ventilation channel such as the regeneration ventilation channel and the combination of this with the heat exchanger. In addition, about the heat exchanger used for this invention, it is preferable to arrange | position suitably so that heat exchange may be performed between air with a small temperature difference.
[0012]
First, the regeneration air passage is an air passage that introduces the air that has passed through the regeneration region into the regeneration air passage that connects the temperature rising region and the heating means. And the air that has passed through the regeneration region is mixed before heating by the heating means, the temperature of the air before being introduced into the heating means is further increased, and the temperature difference between the air before and after heating can be further reduced, It is more preferable in suppressing increase of entropy and reducing energy loss.
[0013]
Further, the air purification apparatus of the present invention is connected to a regeneration air passage connecting the heating means and the regeneration region, and discharges air passages for discharging the air heated by the heating means to the outside, and before being heated by the heating means. Having a second heat exchanger for exchanging heat between the air in the regeneration vent and the air in the discharge vent increases the temperature of the air before heating, or the air in the regeneration vent It is more preferable to appropriately adjust the temperature of
[0014]
The second heat exchanger is not particularly limited as long as it performs heat exchange between the air in the exhaust vent and the air before being heated by the heating means. Specifically, One or more of air before passing through the cooling region, air before passing through the cooling region and passing through the temperature rising region, and air before passing through the temperature rising region and being heated by the heating means Any heat exchanger may be used.
[0015]
Further, the air purification device of the present invention includes the air in the regeneration air passage before passing through the temperature raising region and being heated by the heating means, and the air in the regeneration air passage before being heated by the heating means and passing through the regeneration region. Having a third heat exchanger that exchanges heat between the two can more effectively reduce the temperature difference between the air before and after heating, suppress entropy increase, and reduce energy loss.
[0016]
The third heat exchanger preferably exchanges heat between the air immediately before and after heating. Specifically, the air before passing through the temperature raising region and being heated by the heating means. It is preferable that heat exchange is performed between the air heated by the heating means and before passing through the regeneration region, and the air in the exhaust air passage before passing through the second heat exchanger.
[0017]
In addition, in each of the temperature raising region and the cooling region, the regeneration air passage is an air passage that allows the air in the air passage to pass through the adsorption member a plurality of times. This is more preferable in improving the heating efficiency of the adsorption member in the region.
[0018]
In the present invention, conventionally known various heating means can be used, but a combustion apparatus, a ventilation body provided around the combustion apparatus and containing a catalytic metal for decomposing organic pollutants, If the combustion heater has a combustion chamber and a combustion chamber that houses the ventilation body, it is possible to perform heating of the air and decomposition of the organic pollutants with a single heating means, thus saving labor of the device. It is more preferable from the viewpoints of driving and downsizing.
[0019]
In the case of providing the third heat exchanger, it is possible to control the temperature of the air before heating by the heating means to a higher temperature, and the air immediately after the heating is the highest temperature in the system, It is more preferable to have a catalyst for decomposing organic pollutants in the regeneration air passage between the third heat exchanger and the heating means in order to promote the decomposition and detoxification of the organic pollutants.
[0020]
The combustion apparatus is not particularly limited as long as it can burn organic pollutants at least in the presence of the catalyst and generates a sufficient amount of heat to generate heated air. Such a combustion apparatus Examples thereof include a gas fuel burner, a liquid fuel burner such as a kerosene burner, and an electric heater having a nichrome wire.
[0021]
The aeration body is not particularly limited as long as it contains a catalytic metal such as platinum or palladium and air in a state heated by the combustion device can be freely ventilated, and various configurations such as a lattice body and a mesh body can be cited. However, it is preferable to have close contact with heated air. Further, the ventilation body may be accommodated in the combustion chamber as a single body or two or more bodies. Further, the ventilation body does not have to be made of a catalyst metal, and for example, may support the catalyst metal on the surface.
[0022]
The catalyst may be any one that decomposes organic pollutants in the air, and it is preferable to use an appropriate catalyst according to the use conditions. In the present invention, it is preferable to use a catalytic metal such as platinum or palladium having excellent heat resistance and activity because it is preferably used in a relatively high temperature environment. As the catalyst provided in the regeneration ventilation path, the above-described ventilation body may be used, or particles carrying the catalyst on the surface may be used. The said particle | grain can be provided in the ventilation path for reproduction | regeneration by filling the ventilation path.
[0023]
Further, in the present invention, various forms of adsorbing members can be used according to the amount of processing air of the air purification device, the type of organic pollutant, and the like.
[0024]
The adsorbing member used in the present invention is an adsorbing and breathable member that adsorbs at least organic pollutants, and moves in each of the adsorbing region, the temperature raising region, the regeneration region, and the cooling region. It ’s fine. As such an adsorbing member, for example, an adsorbing member having an endless belt shape, a columnar shape, an annular shape or the like is preferably used from the viewpoint of miniaturization of the apparatus. The suction member having such a shape can be moved in each region by the rotation of the pulley or the rotation of the suction member itself.
[0025]
The adsorbing member only needs to have an adsorbing component for adsorbing organic pollutants in the air at least on the surface, and the adsorbing form is not particularly limited, but adsorbs organic pollutants by physical adsorption. It is preferable from the viewpoint of suppressing the decrease in adsorption efficiency in durability and repeated use. As such an adsorbing member, for example, a ceramic sintered body formed in a porous body such as a honeycomb structure, or a member in which an adsorbing component is supported on the surface of such a porous body is preferably exemplified. it can.
[0026]
The adsorbing member may be formed as a whole by forming a porous body containing an adsorbing component, but is formed by supporting a plate-like porous member containing an adsorbing component with an appropriate frame. May be. Such a configuration is suitable for forming various forms of adsorbing members, and is preferable for configuring an appropriate adsorbing member according to the processing air volume capacity of the air purification device, the type of organic contaminants, and the like. .
[0027]
The adsorbing member used in the present invention is, for example, an annular plate-like member, and is an inner peripheral frame, an outer peripheral frame, and a porous plate that is supported in a planar shape by these frames. An adsorbing member that has an adsorbent and is provided so as to be rotatable about the central axis of the ring as a rotation axis. Such a configuration is preferable when applied to an air purifier having a relatively small processing air flow capacity.
[0028]
Further, as the adsorbing member used in the present invention, for example, an annular member, an inner peripheral side frame, an outer peripheral side frame, and these frames are supported obliquely with respect to the end surface of the adsorbing member. For example, a porous plate-like adsorbent supported so that peaks and valleys are continuously formed along the circumferential direction of the adsorbing member when viewed from one end side of the adsorbing member, and the center of the ring An adsorbing member that is rotatably provided with an axis as a rotation axis can be used.
[0029]
According to such a configuration, the surface area of the plate-like adsorbent in the entire adsorbing member is increased, which is preferable when applied to an air purifier having a relatively large processing air flow capacity. Moreover, in such a structure, in order to support the plate-like adsorbent and distribute the air introduced into the plate-like adsorbent, it is more preferable to provide a support member that spans between the two frame bodies.
[0030]
In the present invention, two or more adsorbents may be used in combination depending on the type of organic pollutant. Examples of such an adsorbent include activated carbon as an adsorbent for adsorbing low-boiling organic pollutants. In the case where two or more kinds of adsorbents are used in combination, it is preferable to arrange them appropriately in accordance with the physical properties of the adsorbent.
[0031]
As such an adsorbing member, for example, a member having a two-layer structure, an upstream adsorbing material provided on the upstream side and a downstream adsorbing material provided on the downstream side in the flow direction of the air passing through the regeneration region. And an adsorbing member in which the downstream adsorbent is an adsorbent containing activated carbon. In the adsorption member having such a multilayer structure, it is preferable to stack an adsorbent having high temperature resistance from the upstream side toward the downstream side in order to reduce the thermal influence on the adsorbent. For example, when the ceramic adsorbent described above and activated carbon are used in combination, the activated carbon is used as the downstream adsorbent with respect to the high-temperature regeneration airflow.
[0032]
In the air purification apparatus of the present invention, in addition to the various means and members described above, a blowing means for blowing air in the ventilation path, a blowing amount control means for controlling the blowing amount of air in the ventilation path, and an adsorption member It is possible to appropriately provide various means such as a transmission for controlling the moving speed of the air and various detection means for monitoring the operation status of the air purification device. By appropriately providing these means, the air purifier can be further suitably operated.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the air purification device of the present invention will be described.
As shown in FIG. 1, the air purifying apparatus in the present embodiment includes an adsorbing member 1 having at least an adsorbing property and an air permeability for adsorbing organic pollutants, a purifying air passage 2 through which air to be treated passes, and a regenerating device. And an air passage 3. In the present embodiment, for convenience, the lower side of the adsorption member 1 in FIG. 1 will be described as “one end side”, and the upper side of the adsorption member 1 will be described as “the other end side”. In this embodiment, the terms “upstream side” and “downstream side” are used in the description. These are the air flow direction in the regeneration air passage 3 or the moving direction of the adsorption member 1 (each in FIG. 1). (Indicated by an arrow).
[0034]
The adsorbing member 1 is an annular plate-like member that is rotatably provided. The adsorbing member 1 is housed in a casing (not shown). This casing forms each region of the adsorption region 4, the temperature rising region 5, the regeneration region 6, and the cooling region 7 by a partition plate having a labyrinth packing, and the adsorption member 1 is configured to move in each region by rotation. ing. The purification air passage 2 is connected to the adsorption region 4. The regeneration air passage 3 is first connected to the cooling region 7, then connected to the cooling region 7 and the temperature raising region 5, then connected to the temperature rising region 5 and the combustion heater 11, and then to the combustion heater 11 and the regeneration region. 6 is connected.
[0035]
A heat exchanger that exchanges heat between the blower f1 and the air in the discharge air passage to be described later and the air upstream of the cooling region 7 is provided in the regeneration air passage 3 upstream of the cooling region 7. h 1, the bypass air passage 8 connecting the upstream and downstream regeneration air passages 3 of the heat exchanger h 1, and the temperature of the air upstream of the cooling region 7 and downstream of the bypass air passage 8. A thermometer 9 for detection is provided. An automatic valve 10 is provided in the bypass air passage 8. The automatic valve 10 is connected to the thermometer 9 and adjusts the opening degree based on the detection result of the thermometer 9.
[0036]
In the cooling region 7, a meandering air passage is formed by the partition plate and the regeneration air passage 3, and air introduced by the regeneration air passage 3 is transferred from the one end side of the adsorption member 1 to the other in the cooling region 7. The suction member 1 is configured to pass through the end side a plurality of times (three times in the present embodiment). The regeneration air passage 3 downstream of the cooling region 7 and upstream of the temperature raising region 5 is provided with a heat exchanger h2 for exchanging heat between air after regeneration and air after cooling, which will be described later. It has been. In the temperature raising region 5, like the cooling region 7, a meandering air passage is formed by the partition plate and the regeneration air passage 3, and the air introduced by the regeneration air passage 3 is supplied to the temperature raising region 5. 5, the suction member 1 is configured to pass through the suction member 1 a plurality of times (three times in the present embodiment) from the other end side to the one end side.
[0037]
In the regeneration air passage 3 downstream of the temperature raising region 5 and upstream of the combustion heater 11, heat exchange is performed between air in a discharge air passage and air in the regeneration air passage 3, which will be described later. A heat exchanger h3, a blower f2, heat exchangers h4 and h5 for exchanging heat between the heated air after regeneration and the air in the regeneration air passage 3, and immediately downstream of the respective heat exchangers And catalysts c1 and c2 for decomposing organic pollutants.
[0038]
The combustion heater 11 includes a burner 11a, a sub-combustion chamber 11b that accommodates the burner 11a, mesh-shaped ventilation bodies 11c to 11e that surround the sub-combustion chamber 11b, and a combustion chamber 11f that accommodates these. The ventilation bodies 11c to 11e have a coarseness of about 2 mm square and are made of platinum which is a catalyst metal. The ventilation body 11c is surrounded by the ventilation body 11d, and the ventilation body 11d is provided so as to be surrounded by the ventilation body 11e.
[0039]
A regeneration passage 3 downstream of the combustion heater 11 and upstream of the regeneration region 6 is provided with a catalyst c3 for decomposing organic pollutants and heat exchangers h5 and h4. Further, a discharge air passage 12 is branched and extended from the regeneration air passage 3 downstream of the heat exchanger h4 and upstream of the regeneration region 6. The exhaust air passage 12 is an air passage that exhausts air in the air passage to the outside through the heat exchangers h3 and h2.
[0040]
In the regeneration region 6, the regeneration air passage 3 forms an air passage through which the heated air introduced into the regeneration region 6 passes through the adsorption member 1 from the other end side to the one end side of the adsorption member 1. The regeneration air passage 3 downstream of the regeneration region 6 is connected to the regeneration air passage 3 downstream of the heat exchanger h3 and upstream of the fan f2 via the heat exchanger h2.
[0041]
As shown in FIG. 2, the suction member 1 is supported in the horizontal direction by a plurality of rollers, and is configured such that the power of the motor 14 is transmitted via the speed reducer 13. The adsorbing member 1 is formed by supporting the air-permeable porous adsorbent shown in FIG. 4 in a planar manner by an inner peripheral frame 1a and an outer peripheral frame 1b as shown in FIG. And is connected to the speed reducer 13 by meshing portions provided on the entire circumference of the outer peripheral side frame 1b. The adsorbing member 1 may be supported so that the rotation axis extends in the horizontal direction, and the shape may be a disk shape.
[0042]
The porous adsorbent shown in FIG. 4 is a ceramic chemical filter as disclosed in JP-A-11-19436, JP-A-11-70313, and JP-A-11-333226. By inorganic mineral ceramics such as Honeycomb A support such as a structure is formed into an appropriate shape, and an inorganic material selected from zeolite, aluminosilicate mineral, zinc aluminosilicate mineral alkali salt, inorganic acid salt, and metal oxide is attached to the surface and fired. Is.
[0043]
Next, the operation of the above-described air purification apparatus will be described by taking as an example the case where factory exhaust gas containing organic pollutants is treated air.
[0044]
First, the purification of the air to be treated will be described. Factory exhaust gas is sent from the purification air passage 2 to the adsorption region 4. Organic pollutants in the factory exhaust gas sent to the adsorption region 4 are adsorbed by the adsorption member 1, and the factory exhaust gas is purified by passing through the adsorption member 1. The gas purified after passing through the adsorption region 4 is released into the atmosphere.
[0045]
On the other hand, the adsorbing member 1 that adsorbs organic contaminants passes through the adsorption region 4 and reaches the temperature raising region 5. Here, the temperature of the adsorption member 1 is increased three times by the air in the regeneration air passage 3. In the temperature raising region 5, the temperature of the adsorption member 1 is increased by the heat recovered from the adsorption member 1 in the cooling region 7 and the heat recovered from the regenerated air by the heat exchanger h <b> 2. The temperature of the adsorbing member 1 is raised to less than the temperature when it is heated in the regeneration region 6. The air flow and heat recovery in the regeneration vent 3 will be described in detail later.
[0046]
The adsorption member 1 heated in the temperature rising region 5 passes through the temperature rising region 5 and reaches the regeneration region 6. Here, the adsorbing member 1 is heated by heated air (about 200 ° C.), and the adsorbed organic pollutant is released to the heated air. In the regeneration region 6, the air heated by the combustion heater 11 and released from the heat exchangers h <b> 5 and h <b> 4 and adjusted in temperature is heated above the temperature at which all target organic pollutants are released from the adsorption member 1. To be heated.
[0047]
The adsorption member 1 heated in the regeneration region 6 passes through the regeneration region 6 and reaches the cooling region 7. Here, the adsorbing member 1 is cooled three times by the air whose temperature is adjusted by the heat exchanger h1, the bypass air passage 8, the thermometer 9, and the automatic valve 10.
[0048]
The suction member 1 cooled in the cooling region 7 passes through the cooling region 7 and reaches the suction region 4 again. The factory exhaust gas is continuously purified by repeating the above-described steps.
[0049]
Next, the air flow in the regeneration vent 3 will be described.
First, outside air is introduced from the outside air intake port that is the starting end of the regeneration air passage 3. The air introduced here is not limited to the outside air, and may be air adjusted in advance by an air conditioner.
[0050]
The air introduced into the regeneration air passage 3 is distributed to the heat exchanger h <b> 1 and the bypass air passage 8 according to the opening degree of the automatic valve 10. The distribution condition at this time is the temperature of the air detected by the thermometer 9, and the opening degree of the automatic valve 10 is controlled so that the air upstream of the cooling region 7 has a predetermined temperature (for example, 25 ° C.). . When the temperature of the introduced air is low, the amount of ventilation to the heat exchanger h1 is increased, and when the temperature of the introduced air is high, the amount of ventilation to the bypass ventilation path 8 is increased.
[0051]
The air in the regeneration air passage 3 first passes through the adsorption member 1 once in the cooling region 7, exchanges heat with the adsorption member 1, cools the adsorption member 1, and cools the adsorption member 1 to, for example, 60 ° C. To be heated. The heated air further passes through the adsorbing member 1 in the cooling region 7 on the upstream side in the rotation direction of the adsorbing member 1 from the first passing position, and is adsorbed in the cooling region 7 from the second passing position. The adsorbing member 1 is passed further upstream in the rotation direction of the member 1. Thus, in the cooling region 7, the air in the regeneration air passage 3 passes through the adsorption member 1 three times in order from the part where the temperature of the adsorption member 1 is low, and the air in the regeneration air passage 3 after passing through the cooling region 7 is The adsorption member 1 heated to 130 ° C. and regenerated (heated) in the regeneration region 6 is cooled to room temperature (for example, around 30 ° C.) in three stages.
[0052]
The air in the regeneration air passage 3 that has passed through the cooling region 7 is further heated by heat exchange in the heat exchanger h2, and is introduced into the temperature raising region 5 in this state (for example, 160 ° C.).
[0053]
The air in the regeneration ventilation path 3 first passes through the adsorption member 1 once in the temperature raising region 5, exchanges heat with the adsorption member 1, raises the temperature of the adsorption member 1, Cool to 130 ° C. The cooled air further passes through the adsorbing member 1 in the temperature rising region 5 on the upstream side in the rotation direction of the adsorbing member 1 from the first passing position, and in the temperature rising region 5 from the second passing position. Passes through the suction member 1 further upstream in the rotation direction of the suction member 1. As described above, in the temperature rising region 5, the air in the regeneration air passage 3 passes through the adsorption member 1 three times in order from the part where the temperature of the adsorption member 1 is high, and the air in the regeneration air passage 3 after passing through the temperature rising region Is cooled to about 60 ° C., while the adsorbing member 1 having adsorbed organic contaminants in the adsorption region 4 is heated to a predetermined temperature in three stages.
[0054]
The air in the regeneration air passage 3 that has passed through the temperature raising region 5 is heated by heat exchange (180 ° C.) in the heat exchanger h3, passes through the blower f2 (165 ° C.), and is heated by heat exchange in the heat exchanger h4 ( 350 ° C.), passes through the catalyst c1, is heated by heat exchange (550 ° C.) in the heat exchanger h5, passes through the catalyst c2, and is sent to the combustion heater 11.
[0055]
The air sent to the combustion heater 11 is further heated (600 ° C.) by the burner 11a, passes through the catalyst c3, passes through the heat exchanger h5 (400 ° C.), and passes through the heat exchanger h4 (200 ° C.). To do. Part (for example, half) of the air that has passed through the heat exchanger h <b> 4 is sent to the exhaust air passage 12, and part is sent to the regeneration region 6. The air sent to the exhaust air passage 12 exchanges heat with the air that has passed through the temperature rising region 5 in the heat exchanger h3, passes through the temperature rising region 5, and is heated by the combustion heater 11. Heat the previous air. The air that has passed through the heat exchanger 3 passes through the heat exchanger h1 and is discharged to the outside.
[0056]
On the other hand, the heated air in the regeneration air passage 3 sent from the heat exchanger h4 to the regeneration region 6 passes through the adsorption member 1 in the regeneration region 6, heats the adsorption member 1, and organic contamination that the adsorption member 1 adsorbs. The substance is released from the adsorbing member 1. The air (180 ° C.) of the regeneration ventilation passage 3 that has passed through the regeneration region 6 passes through the heat exchanger h2 (150 ° C.) in a state containing organic pollutants, and becomes the air before passing through the temperature raising region 5. Release heat. The air that has passed through the heat exchanger h2 merges with the heated air that has recovered heat from the heated air in the heat exchanger h3, and passes through the blower f2.
[0057]
The air containing the organic pollutant is heated by the heat exchanger h <b> 4, then passes through the catalyst c <b> 1, then heated by the heat exchanger h <b> 5, and then passes through the catalyst c <b> 2 and sent to the combustion heater 11. When the catalysts c1 and c2 pass, some of the organic pollutants in the air are decomposed according to the type of the organic pollutants and the temperature of the air when passing.
[0058]
In the combustion heater 11, the air containing organic pollutants is first introduced into the sub-combustion chamber 11a and heated to a high temperature, and then sequentially passes through the vents 11c to 11e containing the catalyst metal. Along with this, organic pollutants in the air are decomposed.
[0059]
The heated air that has passed through the combustion heater 11 is introduced into the catalyst c3 while maintaining a high temperature state. When organic pollutants remain in the air passing through the combustion heater 11, the organic pollutants in the air are further decomposed by the catalyst c3, and the organic pollutants released from the adsorbing member 1 in the regeneration region 6 are Almost decomposed.
[0060]
The heated air used for the regeneration is distributed to the exhaust air passage 12 and the regeneration region 6 as described above, a part of which is discharged, and a part of which is used for the regeneration of the adsorption member 1.
[0061]
FIG. 5 shows a temperature change of the adsorption member 1 in the present embodiment. In FIG. 5, the wavy line indicates the temperature of the adsorption member, and the solid line indicates the temperature of the air passing through the adsorption member 1. FIG. 5 shows that the temperature change between the adsorption region 4 and the regeneration region 6 is smooth.
[0062]
Here, the heat balance relating to the regeneration of the adsorption member 1 will be described. The heating required for the regeneration of the adsorption member 1 is performed only by the combustion heater 11. That is, the combustion source 11 is the only heat source for heating the adsorption member 1 in the regeneration region 6.
[0063]
On the other hand, in the cooling region 7, the air in the regeneration ventilation path 3 recovers heat from the adsorption member 1 heated by regeneration. The cooled air has the heat recovered from the adsorbing member 1 and absorbs the heat of the regenerated air in the heat exchanger h <b> 2, and this air is used to raise the temperature of the temperature raising region 5. That is, the heat used for the regeneration is recovered by the cooling region 7 and the heat exchanger h2, and the temperature raising region 5 is heated only by the recovered heat.
[0064]
Further, in the cooling region 7, air at a predetermined temperature is passed stepwise from a portion away from the regeneration region 6 to a portion close to the regeneration region 6. The temperature difference between the heat collecting side and the heat collecting side (for example, air and air, adsorption member 1 and air, etc.) It is getting smaller.
[0065]
Further, the heat balance of the air in the regeneration air passage 3 before and after the combustion heater 11 will be described. In the heat exchangers h4 and h5, heat is recovered from the air immediately after heating to the air immediately before heating. The temperature difference of air is smaller. Further, the air that has recovered the heat immediately before the heating is configured to pass through the catalyst, and the heat recovered immediately before the heating is used for the decomposition of the organic pollutants in each catalyst.
[0066]
The heat balance between the air in the exhaust vent 12 and the air in the regeneration vent 3 will be described. In the exhaust vent 12, heat generated by the combustion heater 11 by the heat exchangers h1 and h3. Is used to heat the air in the regeneration ventilation path 3.
[0067]
The air purification apparatus in the present embodiment has an adsorption member 1, an adsorption region 4, a temperature raising region 5, a regeneration region 6, and a cooling region 7, and includes a cooling region 7, a heat exchanger h2, a temperature raising region 5, Since the regenerative air passage 3 that passes through the combustion heater 11, the regeneration region 6, and the heat exchanger h2 in this order is provided, the cooling region 7 is heated from the adsorption member 1, and the heat exchanger h2 is heated after passing the regeneration region. Since the heat after regeneration is recovered from the air, and the temperature of the adsorption member 1 is increased before the regeneration using the recovered heat as a heat source, the energy required for increasing the temperature of the adsorption member 1 and securing the temperature of the regeneration region 6 is obtained. Can be saved.
[0068]
Moreover, since the air purification apparatus in this Embodiment has the temperature rising area | region 5, the temperature change by the heating from the adsorption | suction area | region 4 to the reproduction | regeneration area | region 6 is smoother, and can suppress the increase in entropy more, Energy loss can be further reduced.
[0069]
Further, in the air purifying apparatus in the present embodiment, the regeneration air passage 3 on the downstream side of the regeneration region 6 is connected to the regeneration air passage 3 that connects the temperature raising region 5 and the combustion heater 11. Then, the air that has released heat in the temperature raising region 5 and the heated air that has passed through the regeneration region 6 are sent to the combustion heater 11 in a mixed state, and the temperature of the air before heating is further increased to increase the temperature after regeneration. Heat can be used effectively.
[0070]
In addition, the air purification apparatus in the present embodiment includes the exhaust air passage 12, the heat exchanger h3, and the heat exchanger h1 through which the heated air passes, so that heat is generated between the heated air and the heated air. Heat exchange can be performed between the heated air after the heat exchange and the air before cooling, and the temperature difference between the air before and after the heating can be further increased by increasing the temperature of the air before the temperature rise. The heat of the air after the heat exchange is reduced and used for temperature control of the air in the regeneration vent 3 before cooling, and the heat generated by the combustion heater 11 can be used effectively. .
[0071]
Moreover, since the air purification apparatus in this Embodiment has the heat exchanger h4 and the heat exchanger h5, heat exchange is performed between the air immediately before and after the combustion type heater 11, and the heating by the combustion type heater 11 is carried out. Can be suppressed, and heated air having a temperature suitable for regeneration can be sent to the regeneration region 6.
[0072]
In the air purifying apparatus according to the present embodiment, the air introduced from the regeneration ventilation path 3 passes through the adsorption member 1 three times from the other end side to the one end side in the temperature raising region 5, while the cooling region 7, the adsorbing member 1 passes through the adsorbing member 1 three times from the one end side to the other end side, and therefore, in the adsorbing region 5 and the cooling region 7, the rapid temperature change of the adsorbing member 1 and the air passing therethrough is further suppressed. Can do.
[0073]
Moreover, since the air purification apparatus in this Embodiment enclosed the auxiliary | assistant combustion chamber 11b with the ventilation body which is the metal mesh containing a catalyst metal, generation | occurrence | production of heating air, and organically using only a single heating means. The pollutants can be decomposed.
[0074]
Moreover, since the air purification apparatus in this Embodiment has the catalysts c1-c3 in the ventilation path 3 before and behind the combustion type heater 11, it can further promote decomposition | disassembly of the organic pollutant in air.
[0075]
Moreover, since the air purification apparatus in this Embodiment has the bypass ventilation path 8, the thermometer 9, and the automatic valve 10, it can control appropriately the temperature of the air in the regeneration ventilation path 3 before cooling.
[0076]
Moreover, since the air purification apparatus in this Embodiment uses the inorganic type adsorption member 1 containing a ceramic, it has high temperature resistance, can raise regeneration temperature, and is stable over a long period of time also in a high temperature state. Can be used.
[0077]
The adsorbing member 1 is configured as an annular plate-shaped adsorbing member by supporting a plate-shaped adsorbing material with a frame as described above, and exhibits high performance with a simple configuration. Such a flat adsorption member 1 can process air to be treated, for example, about 10 times as much as the amount of outside air introduced into the regeneration air passage 3, but it can process more air to be treated. In that case, it is preferable to use the adsorbing member 21 shown in FIGS. As shown in FIG. 6, the adsorption member 21 can be attached in the same manner as the adsorption member 1 described above, and can be supported in the vertical direction in the same manner as the adsorption member 1.
[0078]
The adsorbing member 21 is an annular member, and is spanned between the inner peripheral frame 21a, the outer peripheral frame 21b, the porous plate-shaped adsorbent shown in FIG. 9, and the frames 21a and 21b. Plate-like support members 21c and 21d. The support member 21c is spanned between the frame bodies at a proximity portion of the plate-like adsorbent on the other end side, and the support member 21d is spanned between the frame bodies at a proximity portion of the plate-like adsorbent material on the one end side. Has been passed.
[0079]
As shown in FIGS. 7 and 8, the plate-like adsorbent is supported in an oblique direction with respect to the end surface of the adsorbing member and so that one edge of the adjoining plate-like member is close by the supporting members 21c and 21d. Then, when viewed from one end side, the adsorbent surface forms continuous peaks and valleys. The same thing as what was used with the adsorption member 1 can be used for a plate-shaped adsorption material except a different shape. In addition, 21e in FIG. 8 has shown the partition of the casing.
[0080]
Since the adsorbing member 21 has a configuration in which the adsorbent surface forms peaks and valleys when viewed from one end side, the surface area of the adsorbing material, that is, the area where the air to be treated can be vented becomes larger. Suitable for use in larger cases.
[0081]
In the air purification apparatus of the present invention, if the heat capacity per hour is set to a close value between the adsorbing member and the air passing through the adsorbing member, the temperature change in each of the adsorbing member and the air is also close. This value is preferable in controlling the entrance / exit temperature in each part such as the adsorption region. Therefore, from the viewpoint of thermal efficiency in the air purification apparatus of the present invention, the moving speed of the adsorbing member, the processing air volume, and the intake amount of outside air are determined by examining the heat capacity of the adsorbing member and the air passing through the adsorbing member. preferable.
[0082]
Further, the adsorbing member used in the present invention may be constituted by using two or more kinds of adsorbing materials according to the type of organic pollutant. As an example, the adsorbing member 31 shown in FIG. Can be mentioned. The adsorbing member 31 includes a ceramic adsorbent layer 32 and an activated carbon adsorbent layer 33. The ceramic-based adsorbent layer is the same as the adsorbent used in the adsorbing members 1 and 21. The activated carbon adsorbent layer 33 is made of a ceramic support (for example, ceramic paper). Honeycomb Activated carbon is supported on the surface of the structure or the like.
[0083]
In forming these layers, for example, the respective adsorbent layers may be bonded and supported, or an inorganic adsorbing component is attached to one end side in the cross section of the ceramic support, and the other end side is supported. May support activated carbon. Also, three or more layers of adsorbing members using three or more kinds of adsorbents can be used in the present invention.
[0084]
When the adsorbing member 31 is applied to the air purification apparatus in the present embodiment in the state shown in FIG. 10, the air that heats the adsorbing member, like the regeneration region 6 and the temperature raising region 5, That is, air that passes through the adsorbing member from the ceramic adsorbent layer 32 side and cools the adsorbing member as in the cooling region 7 or the adsorbing region 4 or substantially isothermal air is adsorbed on one end of the adsorbing member 31, that is, activated carbon adsorption. The adsorbing member passes from the material layer 33 side.
[0085]
That is, when the temperature of the air in the regeneration vent 3 is higher than the temperature of the adsorption member 31, the heat of the introduced air is first absorbed by the ceramic adsorbent layer 32, and the temperature of the air in the regeneration vent 3 is When the temperature is lower than the temperature of the adsorbing member 31, since the heat of the activated carbon adsorbent layer 33 is first recovered (cooled) by the introduced air, the activated carbon can be prevented from being damaged under high temperature conditions.
[0086]
In this way, in an adsorbing member having two or more adsorbent layers, determining the direction of air introduction into the adsorbing member depending on the strength of heat resistance suppresses the thermal effect on the adsorbent and provides stable purification over a long period of time. It is preferable when performing.
[0087]
【The invention's effect】
The air purifying apparatus of the present invention includes an adsorbing member having adsorbability and air permeability for adsorbing organic pollutants, an adsorbing region for passing the air to be treated through the adsorbing member, and an adsorption through the air to be treated in the adsorbing region A temperature rising region for raising the temperature of the member, and an adsorption member heated in the temperature rising region to be heated to a temperature higher than the temperature at which the organic pollutant is released from the adsorption member to regenerate the adsorption force of the adsorption member. A regeneration region and a cooling region for cooling the adsorption member heated in the regeneration region, and the adsorption member moves through the adsorption region, the temperature rising region, the regeneration region, and the cooling region. An air purification device for continuously purifying the air to be treated, wherein a purification air passage for passing the air to be treated through the adsorption region, a cooling region, a temperature raising region, and a regeneration region are connected in this order, and the air is disposed in the cooling region. And pass the air that has passed through the cooling zone to the heating zone. The air in the regeneration air passage that passes the air passing through the temperature raising region to the regeneration region and the air in the regeneration air passage connecting the temperature rising region and the regeneration region are heated to a temperature higher than the temperature at which the organic pollutant is released from the adsorbing member. Since it has a heating means and a first heat exchanger that performs heat exchange between the air that has passed through the cooling region and passed through the temperature rising region and the air that has passed through the regeneration region, the air to be treated An increase in entropy associated with purification of the air can be suppressed, and an air purification device with less energy loss can be provided.
[0088]
Further, in the present invention, the regeneration air passage is an air passage that introduces the air that has passed through the regeneration region into the regeneration air passage that connects the temperature rising region and the heating means. It is even more effective in using it.
[0089]
Further, the air purification apparatus of the present invention is connected to a regeneration air passage connecting the heating means and the regeneration region, and discharges air passages for discharging the air heated by the heating means to the outside, and before being heated by the heating means. Having a second heat exchanger that exchanges heat between the air in the regeneration vent and the air in the exhaust vent, the temperature of the air in the regeneration vent is effectively utilized by utilizing the heat of the heated air. It is much more effective in controlling.
[0090]
Further, the air purifying apparatus of the present invention includes the air in the regeneration air passage before passing through the temperature raising region and being heated by the heating means, and the air in the regeneration air passage before being heated by the heating means and passing through the regeneration region. Having a third heat exchanger that exchanges heat between the two is more effective in increasing the temperature of the air immediately before heating and reducing the temperature difference between the air before and after heating.
[0091]
Further, in the present invention, the regeneration ventilation path is a ventilation path that allows the air in the ventilation path to pass through the adsorption member a plurality of times in each of the temperature rising area and the cooling area. It is even more effective in suppressing a significant temperature change and performing efficient heat recovery and temperature rise.
[0092]
In the present invention, the heating means includes a combustion device, a ventilation body that is provided around the combustion device and contains a catalytic metal for decomposing organic pollutants, and a combustion chamber that houses the combustion device and the ventilation body. The combustion heater having the above can generate heated air and decompose organic pollutants with an integral heating means, and is more effective in terms of energy saving and downsizing of the apparatus.
[0093]
Further, the air purification apparatus of the present invention has an organic pollutant released from the adsorbing member when the regeneration air passage between the third heat exchanger and the heating means has a catalyst for decomposing the organic pollutant. It is even more effective in promoting the decomposition of.
[0094]
In the present invention, the adsorbing member is an annular plate-like member, and includes an inner peripheral side frame, an outer peripheral side frame, and a porous plate-like adsorbent supported in a planar shape by the frame. It is more effective in constructing a high-performance air purification device with a simple configuration if it is provided so as to be rotatable about the center axis of the ring.
[0095]
In the present invention, the adsorbing member is an annular member, and is an inner peripheral frame, an outer peripheral frame, and a porous plate that is supported by the frame obliquely with respect to the end surface of the adsorbing member. It is more effective to increase the processing air volume of the air to be processed if it has an adsorbent and is provided so as to be rotatable about the central axis of the ring.
[0096]
In the present invention, the adsorbing member is a member having a two-layer structure, and an upstream adsorbing material provided on the upstream side and a downstream adsorbing material provided on the downstream side in the flow direction of the air passing through the regeneration region. If the downstream adsorbent is an adsorbent containing activated carbon, it is more effective in adsorbing and decomposing a plurality of types of organic pollutants having different physical properties.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an overall configuration of an air purifying apparatus according to an embodiment of the present invention.
FIG. 2 is a view showing an adsorption member 1 shown in FIG.
FIG. 3 is an enlarged cross-sectional view of a main part showing an enlarged main part of the adsorption member 1 shown in FIG. 1;
4 is a view showing a plate-like adsorbent used in the adsorbing member 1 shown in FIG. 1. FIG.
FIG. 5 is a diagram showing the temperature change of the adsorbing member 1 and the air passing through the adsorbing member 1 in the present embodiment.
FIG. 6 is a view showing another embodiment of the adsorbing member used in the present invention.
7 is an enlarged cross-sectional view of a main part showing an enlarged main part of the adsorption member 21 shown in FIG.
8 is a cross-sectional view showing the suction member in a state cut along the line II in FIG.
9 is a diagram showing a plate-like adsorbent used in the adsorbing member 21 shown in FIG. 6. FIG.
FIG. 10 is a view showing another embodiment of the adsorbing member used in the present invention.
[Explanation of symbols]
1, 21, 31 Adsorption member
1a, 1b, 21a, 21b Frame
2 Ventilation path for purification
3 Regeneration vent
4 adsorption area
5 Temperature rise area
6 Playback area
7 Cooling area
8 Bypass air passage
9 Thermometer
10 Automatic valve
11 Combustion heater
11a burner
11b Subcombustion chamber
11c-11e Ventilation body
11f Combustion chamber
12 Discharge air passage
13 Reduction gear
14 Motor
21c, 21d Support member
21e Casing bulkhead
32 Ceramic-based adsorbent layer
33 Activated carbon adsorbent layer
c1 to c3 catalyst
f1-f3 blower
h1-h5 heat exchanger

Claims (10)

An adsorbing member having adsorbability and breathability for adsorbing organic pollutants;
An adsorption region for passing the air to be treated through the adsorption member;
A temperature raising region for raising the temperature of the adsorption member through which the air to be treated is passed in the adsorption region;
A regeneration region for regenerating the adsorption force of the adsorption member by heating the adsorption member heated in the temperature elevation region to a temperature higher than the temperature at which organic contaminants are released from the adsorption member;
A cooling area for cooling the adsorption member heated in the regeneration area, and the adsorption member moves through the adsorption area, the temperature raising area, the regeneration area, and the cooling area. An air purification device for continuously purifying air to be treated,
A purification vent for passing the air to be treated to the adsorption region;
The cooling region, the temperature rising region, and the regeneration region are connected in this order, air is passed through the cooling region, air passing through the cooling region is passed through the temperature rising region, and air passing through the temperature rising region is passed through the regeneration region. For airway,
Heating means for heating the air in the regeneration ventilation path connecting the temperature raising region and the regeneration region to a temperature equal to or higher than the temperature at which organic contaminants are released from the adsorption member;
An air purification apparatus comprising: a first heat exchanger that exchanges heat between air that has passed through the cooling region and has not yet passed through the temperature raising region, and air that has passed through the regeneration region. 2. The air according to claim 1, wherein the regeneration air passage is an air passage that introduces air that has passed through the regeneration region into a regeneration air passage that connects the temperature rising region and the heating unit. Purification equipment. A discharge air passage connected to a regeneration air passage connecting the heating means and the regeneration region to discharge the air heated by the heating means to the outside, and air in the regeneration air passage before being heated by the heating means The air purifier according to claim 1, further comprising: a second heat exchanger that exchanges heat between the air and the air in the exhaust ventilation path. Heat exchange is performed between the air in the regeneration vent passage that has passed through the temperature raising region and before being heated by the heating means, and the air in the regeneration vent passage that has been heated by the heating means and has not passed through the regeneration region. It has a 3rd heat exchanger to perform, The air purification apparatus as described in any one of Claim 1 thru | or 3 characterized by the above-mentioned. 5. The regeneration air passage is an air passage that allows air in the air passage to pass through the adsorption member a plurality of times in each of the temperature raising region and the cooling region. The air purifier according to one item. The heating means includes a combustion device, a ventilation body that is provided around the combustion device and contains a catalytic metal for decomposing the organic pollutant, and a combustion chamber that houses the combustion device and the ventilation body. The air purifier according to any one of claims 1 to 5, wherein the air purifier is a combustion type heater. The air purification apparatus according to claim 4, wherein a catalyst for decomposing the organic pollutant is provided in a regeneration air passage between the third heat exchanger and the heating means. The adsorbing member is an annular plate-like member, and has an inner peripheral side frame, an outer peripheral side frame, and a porous plate-like adsorbent supported in a planar shape by the frame, The air purification apparatus according to claim 1, wherein the air purification apparatus is rotatably provided with a central axis of the ring as a rotation axis. The adsorbing member is an annular member, and includes an inner peripheral frame, an outer peripheral frame, and a porous plate-shaped adsorbent that is supported by the frame obliquely with respect to the end surface of the adsorbing member. The air purification device according to claim 1, wherein the air purification device is provided so as to be rotatable about a central axis of the ring as a rotation axis. The adsorbing member is a two-layered member, and has an upstream adsorbing material provided on the upstream side and a downstream adsorbing material provided on the downstream side in the flow direction of the air passing through the regeneration region. The air purification apparatus according to claim 1, wherein the downstream side adsorbent is an adsorbent containing activated carbon.

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