A zero air loss blower type desiccant dryer

Abstract

The present invention relates to the technical field of adsorption dryers, and in particular to a zero-gas-loss blower type adsorption dryer, comprising two adsorption towers and a regeneration system; the regeneration system comprises a fan, a heater and a preheating mechanism; the preheating mechanism comprises a casing with a working space inside and a driving assembly; a partition is provided in the working space, and the working space is divided into a filtering space and a heat exchange space by the partition; a plurality of rotating rings are provided on the partition, and the rotating rings are driven by the driving assembly to rotate circumferentially; the rotating rings form a heat exchange part and a filtering part in the heat exchange space and the filtering space respectively; the filtering part divides the filtering space into a first air zone and a second air zone, and a filtering channel is formed between two adjacent filtering parts; one of the first air zone and the second air zone is connected to the air outlet end of the fan, and the other is connected to the air inlet end of the heater; the present invention can not only filter the ambient air, but also use the waste heat of the regenerated gas to preheat the ambient air to reduce the energy consumption of the heater.

Description

Technical Field

[0001] The invention relates to the technical field of desiccant dryers, and in particular to a zero-air-loss blower desiccant dryer. Background Art

[0002] The desiccant dryer, also known as the drying machine, is mainly used to dry compressed gas. The main principle is to pass the compressed air into the adsorption tower, and the desiccant (also called adsorbent) in the adsorption tower absorbs the moisture in the compressed air to obtain dry finished gas.

[0003] In the related art, the desiccant in the adsorption tower is generally a regenerable desiccant, which can be regenerated after being heated by hot air for recycling; therefore, in the related art, two adsorption towers are set up for cyclic work, that is, when one adsorption tower is performing adsorption work, hot air is introduced into the other adsorption tower to regenerate the desiccant, and the two adsorption towers are operated alternately to achieve cyclic drying to improve work efficiency.

[0004] At present, there are two main types of double-tower dryers: zero air loss and air loss:

[0005] For the desiccant dryer with gas loss, the principle is that the finished gas discharged from the adsorption tower which is performing adsorption work will be separated into a path and passed into the adsorption tower which needs to regenerate the desiccant, so as to promote the regeneration of the desiccant in the adsorption tower. This is equivalent to the consumption of part of the finished gas, that is, there is gas loss.

[0006] As for the zero air loss dryer, the difference between it and the air loss dryer is that it basically does not consume finished gas, but is directly connected to an external blower and a heater. The blower and the heater heat the ambient air and then pass it into the adsorption tower where the desiccant needs to be regenerated to achieve the regeneration of the desiccant. For this type of dryer, reference can be made to the dryer structure disclosed in documents such as announcement numbers CN219441214U and CN210544261U.

[0007] However, the existing zero-gas-loss desiccant machine still has defects in practical applications. First, since the ambient air is used for desiccant regeneration, when the ambient temperature is low, the heater needs more heat energy to heat the ambient air, which will increase the energy consumption of the heater. Secondly, after the heated ambient air is passed into the adsorption tower to regenerate the desiccant, it will be directly discharged in the form of regenerated gas. However, there is still a lot of heat in the regenerated gas. Directly discharging it will obviously waste the heat energy attached to the regenerated gas. Summary of the invention

[0008] In order to solve at least one of the technical problems mentioned in the background technology, the object of the present invention is to provide a zero-air-loss blower type desiccant.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A zero-gas-loss blower type desiccant dryer, comprising two adsorption towers for alternately drying compressed air, and a regeneration system for alternately regenerating desiccants in the two adsorption towers; the regeneration system comprises a fan and a heater, the fan is used to blow ambient air into the heater for heating to form hot air, the hot air is used to pass into the adsorption tower to regenerate the desiccant in the adsorption tower and generate regenerated gas to be discharged from the adsorption tower; and also comprises a preheating mechanism;

[0011] The preheating mechanism includes a casing with a working space inside and a driving assembly; a partition is provided in the working space, and the working space is divided into a filtering space and a heat exchange space for receiving regenerated gas by the partition; a plurality of rotating rings are arranged in sequence along the axial direction, and the rotating rings are driven by the driving assembly to rotate circumferentially; the rotating rings penetrate the partition to form a heat exchange part and a filtering part in the heat exchange space and the filtering space respectively; the filtering part divides the filtering space into a first air zone and a second air zone, and a filtering channel connecting the first air zone and the second air zone is formed between two adjacent filtering parts; one of the first air zone and the second air zone is connected to the air outlet end of the fan, and the other is connected to the air inlet end of the heater.

[0012] Compared with the prior art, the advantages of this solution are:

[0013] This solution mainly uses a fan to introduce ambient air to regenerate the desiccant in the adsorption tower to achieve the purpose of zero air loss.

[0014] During the desiccant regeneration process, the ambient air will be introduced into the filter space before entering the adsorption tower, and filtered through the filter channel formed between the filter parts of each rotating ring to filter out some larger impurities in the ambient air, preventing excessive impurities in the ambient air from entering the adsorption tower and contaminating the desiccant.

[0015] In addition, the regenerated gas discharged during the regeneration process of the adsorption tower will first be introduced into the heat exchange space, thereby contacting the heat exchange part of the rotating ring in the heat exchange space for heat exchange to heat the rotating ring; and the rotating ring rotates circumferentially, so during the rotation of the rotating ring, at least part of the heat exchange part will rotate into the filter space as the filter part, and the filter part will correspondingly at least partly rotate into the heat exchange space as the heat exchange part, so that the filter part and the heat exchange part are always in a process of continuous rotation and alternation.

[0016] In this process, when the heat exchange part heated by the regeneration gas in the heat exchange space rotates to the filtering space as the filtering part, it can not only filter the ambient air, but also because it is heated by the regeneration gas, it will contact with the ambient air for heat exchange during the filtering process to heat the ambient air and preheat the ambient air. The preheated and filtered ambient air is then discharged into the heater for heating, and finally passed into the adsorption tower to realize the regeneration of the desiccant.

[0017] In addition, during this process, the filter part in the filter space will rotate into the heat exchange space and be used as the heat exchange part again to exchange heat with the regeneration gas in the heat exchange space, thereby being heated.

[0018] It can be seen that by setting up a preheating mechanism in this scheme, not only can the ambient air be filtered, but also during the filtering process, the residual heat carried by the regeneration gas discharged from the adsorption tower is converted to the ambient air through the rotating ring as a heat transfer medium, so as to preheat the ambient air. In this way, the ambient air has a certain temperature before entering the heater, so the energy consumption of the heater can be relatively reduced. It can be seen that in this scheme, the rotating ring is used as a filtering unit for filtering the ambient air and as a heat exchange medium for absorbing the residual heat of the regeneration gas discharged from the adsorption tower.

[0019] Finally, it is worth mentioning that in this solution, since the swivel is rotating and the swivel is part of the side wall of the filter channel, it is equivalent to that part of the side wall of the filter channel is movable, which can disturb the impurities entering the filter channel, making it difficult for the impurities to accumulate and clog the filter channel.

[0020] As an optional embodiment of the present invention, the preheating mechanism also includes a guide assembly for guiding the circumferential rotation of the rotating ring, the guide assembly includes a plurality of guide wheel groups corresponding one to the rotating ring, the guide wheel group includes a plurality of guide wheels arranged on a partition and having a rotation axis parallel to the axial direction of the rotating ring, the guide wheels are all abutted against the inner ring of the rotating ring to ensure that the rotating ring is limited to rotate around its own axis under the interference of the guide wheel group.

[0021] As an optional embodiment of the present invention, the guide assembly also includes guide shafts having the same number as the guide wheels in the guide wheel group, and the guide shafts are arranged on the partition, and the guide wheels at the same position in each guide wheel group are coaxially arranged on the same guide shaft.

[0022] As an optional embodiment of the present invention, the driving assembly is used to drive the swivel to rotate continuously in a circumferential direction, and includes a motor, wherein at least one guide shaft constitutes a driving shaft, and the driving shaft is rotatably connected to the partition and driven to rotate by the motor; the guide wheel on the driving shaft is fixedly connected to the driving shaft, and the swivel is driven to rotate in a circumferential direction by the guide wheel on the driving shaft.

[0023] As an optional embodiment of the present invention, the driving assembly is used to drive the swivel to reciprocate in a circumferential direction, and includes a motor, a shift fork and a through rod; the shift fork is driven by the motor to reciprocate and swing around an axis parallel to the axial direction of the swivel; a fork groove extending along the length direction of the fork is provided in the shift fork; the through rod is penetrated on all the swivels along the axial direction of the swivel; the end of the through rod close to the shift fork constitutes a force-bearing end, and the force-bearing end is inserted into the fork groove.

[0024] As an optional embodiment of the present invention, the force-bearing end can elastically expand and contract along the axial direction of the through rod, and when the force-bearing end is not subject to external force in the axial direction, the force-bearing end maintains a tendency to extend axially outward to remain in the fork groove; a guide surface is formed on the side wall of the fork facing the through rod, and the guide surface is constructed so that when the force-bearing end moves on the guide surface toward the side close to the slot, the force-bearing end overcomes its own elastic force and gradually contracts axially under the resistance of the guide surface.

[0025] As an optional embodiment of the present invention, the partition includes two unit plates, and the two unit plates are detachably connected along a first direction; the swivel includes two half rings, wherein the two half rings are detachably connected along a first direction; the two half rings are movably arranged on the two unit plates, and when the two unit plates are connected, the two half rings are connected to form the swivel.

[0026] As an optional embodiment of the present invention, two arc guide grooves for the swivel to move through are opened on the partition corresponding to the position of the swivel, the axes of the two arc guide grooves coincide with the axis of the swivel, and a seal is provided between the arc guide groove and the swivel.

[0027] As an optional embodiment of the present invention, an arc-shaped baffle is provided between two adjacent filter parts, and the baffle and the adjacent filter part are arranged at intervals to form the filter channel; the baffle is arranged on the partition and remains relatively fixed to the partition.

[0028] As an optional implementation manner of the present invention, a dust filter is provided between the preheating mechanism and the heater.

[0029] Other advantages and effects of this solution are explained in detail in the specific implementation and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is an exploded view of the preheating mechanism of the present invention;

[0032] Figure 3 It is an axial cross-sectional view of the preheating mechanism of the present invention;

[0033] Figure 4It is a schematic diagram of the upper structure of the partition part of the present invention;

[0034] Figure 5 It is a schematic diagram of the lower structure of the partition part of the present invention;

[0035] Figure 6 An exploded view of the partition portion of the present invention;

[0036] Figure 7 It is a partial structural schematic diagram of a unit board of the present invention;

[0037] Figure 8 It is a schematic diagram of the local structure of the housing of the present invention at the position of the shift fork;

[0038] Fig. 9 is a cross-sectional view of the shift fork of the present invention;

[0039] Fig.10 It is a structural schematic diagram of the present invention when the shift fork is at the 0° position;

[0040] Fig.11 It is a structural schematic diagram of the present invention when the shift fork is at a 90° position;

[0041] Fig.12 It is a schematic diagram of the structure when the shift fork of the present invention is at the 180° position. DETAILED DESCRIPTION

[0042] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0043] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0044] For ease of understanding, Figure 1-12 As shown, first explain the relevant technical terms in this article:

[0045] Finished gas refers to the air discharged after the compressed air is adsorbed and dried in the adsorption tower 1.

[0046] The regeneration gas refers to the air generated after the heated ambient air is introduced into the adsorption tower 1 to regenerate the desiccant in the adsorption tower 1 .

[0047] Ambient air refers to the outside air present in the working environment (such as a workshop, etc.).

[0048] Example 1

[0049] See also Figure 1-12 As shown, this embodiment provides a zero-gas-loss blower type desiccant, comprising two adsorption towers 1 and a regeneration system. The two adsorption towers 1 have basically the same structure, and are provided with a desiccant (also understood as an adsorbent) that can be regenerated under hot air heating. The desiccant is mainly used to absorb moisture in the compressed air to be dried; and the compressed air can be provided by equipment such as an air compressor.

[0050] In addition, the two adsorption towers 1 work alternately. It can be understood that when one of the adsorption towers 1 is performing adsorption and drying work, the other adsorption tower 1 is in the process of introducing hot air to regenerate the desiccant. In short, one adsorption tower 1 adsorbs while the other adsorption tower 1 regenerates. Such alternating cycles can achieve continuous drying of the compressed air.

[0051] The alternating operation between the two adsorption towers 1 is mainly realized by the pipeline system, specifically:

[0052] like Figure 1 As shown, an air inlet pipeline M and an air outlet pipeline N are provided between the two adsorption towers 1:

[0053] The air intake pipeline M includes an air intake main pipe M1 , an exhaust main pipe M4 , and two first pipelines M2 . Two first valves M3 are disposed on the two first pipelines M2 . The two first pipelines M2 are connected in parallel to the air intake ends of the two adsorption towers 1 .

[0054] The air inlet pipe M1 is mainly used to pass the compressed air to be dried into the corresponding adsorption tower 1. Figure 1 Taking the viewing angle as an example, the outlet end of the air intake main pipe M1 is connected between the two first valves M3 of the first pipeline M2 on the upper side. In this way, the compressed air can be introduced into the desired adsorption tower 1 by controlling the switching of the two first valves M3 on the first pipeline M2. For example, in the first pipeline M2 on the upper side, when the first valve M3 on the left side of the first pipeline M2 is closed and the first valve M3 on the right side is opened, the compressed air output from the air intake main pipe M1 can enter the adsorption tower 1 on the right side.

[0055] The exhaust main pipe M4 is mainly used for discharging the regenerated gas in the adsorption tower 1; one end of the exhaust main pipe M4 is connected between the two first valves M3 of the first pipeline M2 on the lower side, so that by switching the two first valves M3, the corresponding adsorption tower 1 can be selected to discharge the regenerated gas. For example, when the adsorption tower 1 on the left is regenerating, at this time, in the first pipeline M2 on the lower side, the first valve M3 on the left can be opened and the first valve M3 on the right can be closed, so that the regenerated gas discharged from the adsorption tower 1 on the left can be finally discharged by the exhaust main pipe M4.

[0056] The gas outlet pipeline N includes two second pipelines N2, a finished gas main pipeline N1, and a hot gas main pipeline N4; the two second pipelines N2 are connected in parallel to the gas outlet ends of the two adsorption towers 1; and two second valves N3 are provided on the two second pipelines N2.

[0057] The finished gas main N1 is mainly used to discharge the finished gas output from the adsorption tower 1; Figure 1 In the viewing angle shown, one end of the finished gas main pipe N1 is connected between two second valves N3 on the upper second pipeline N2.

[0058] The hot gas main pipe N4 is mainly used to introduce hot gas into the adsorption tower 1 for regeneration of the desiccant; one end of the hot gas main pipe N4 is connected between the two second valves N3 on the lower second pipeline N2, and by switching the two second valves N3, the hot gas can be introduced into the desired adsorption tower 1 for regeneration of the desiccant.

[0059] The regeneration system is used to alternately regenerate the desiccant in the two adsorption towers 1 , that is, when one of the adsorption towers 1 is performing adsorption and drying work, the other adsorption tower 1 regenerates the internal desiccant through the regeneration system to prepare for the next adsorption work.

[0060] like Figure 1 As shown, the regeneration system includes a fan 3 , a heater 4 and a preheating mechanism 2 .

[0061] The fan 3 is used to blow ambient air into the heater 4 for heating to form hot gas, and the hot gas is used to pass into the adsorption tower 1 to achieve regeneration of the desiccant in the adsorption tower 1, and the regeneration gas generated during the regeneration process is discharged from the adsorption tower 1; the fan 3 can be a blower, and the heater 4 can be an electric heater.

[0062] like Figure 2 and Figure 3 As shown, the preheating mechanism 2 includes a housing 21 and a driving assembly 22; the housing 21 has a working space 20 inside.

[0063] A partition 23 is provided in the working space 20, and the working space 20 is divided into a filtering space 202 and a heat exchange space 201 by the partition 23, wherein the filtering space 202 and the heat exchange space 201 are isolated from each other and used as two independent spaces. The filtering space 202 is mainly used as a space for filtering the ambient air, and the heat exchange space 201 is mainly used as a space for absorbing the waste heat of the regenerated gas.

[0064] For example, in this embodiment, Figure 3 As shown, the partition 23 is horizontally arranged in the working space 20 , the area of ​​the working space 20 located above the partition 23 constitutes a heat exchange space 201 , and the area of ​​the working space 20 located below the partition 23 constitutes a filtering space 202 .

[0065] like Figure 2 As shown, the partition plate 23 is provided with a plurality of rotating rings 6 which are arranged in sequence along the axial direction. Figure 3 Taking the viewing angle as an example, all the rotating rings 6 are evenly spaced from left to right; the rotating ring 6 is a circular ring structure and is made of a heat-conducting material, such as a heat-conducting metal material such as copper, aluminum, or a plastic material with heat-conducting properties, etc., which is not specifically limited here.

[0066] The rotating ring 6 can rotate circumferentially around its own axis on the partition 23, and the driving assembly 22 provides power to drive all the rotating rings 6 to rotate circumferentially.

[0067] The rotating ring 6 can circumferentially rotate through the partition 23 to form a heat exchange portion 611 and a filter portion 612 in the heat exchange space 201 and the filter space 202, respectively. Figure 3 For example, the partition 23 crosses the center of the swivel 6 , the portion of the swivel 6 located above the partition 23 constitutes the heat exchange portion 611 , and the portion of the swivel 6 located below the partition 23 constitutes the filter portion 612 .

[0068] In addition, if Figure 3 , Fig.10 As shown, the filter portion 612 separates the filter space 202 into a first air zone a and a second air zone b; for example, in this embodiment, the inner circle of the filter portion 612 and the bottom wall of the partition 23 together form the first air zone a, and the outer circle of the filter portion 612 and the peripheral wall of the filter space 202 together form the second air zone b.

[0069] The interval between two adjacent filter parts 612 forms a filter channel 60 connecting the first air zone a and the second air zone b. The filter channel 60 mainly filters the ambient air. When the ambient air passes through the filter channel 60, some larger impurities mixed in the ambient air are blocked by the filter channel 60, so that they cannot pass through the filter channel 60, thereby achieving the purpose of filtering. The width of the filter channel 60 in the axial direction of the rotating ring 6 can be selected according to the actual working environment, preferably between 0.1 mm and 5 mm, such as 0.2 mm, 0.5 mm, etc. The smaller the width, the smaller the impurity particles that can be filtered.

[0070] In addition, in this embodiment, in order to reduce the width of the filter channel 60, as shown in FIG. Figure 3 and Figure 5 As shown, an arc-shaped baffle 7 is provided between two adjacent filter parts 612. The baffle 7 has the same arc as the swivel 6. The baffle 7 and the adjacent filter part 612 are spaced apart to form the filter channel 60. The baffle 7 is provided on the partition 23 and remains relatively fixed to the partition 23.

[0071] In addition, it can be understood that the clearance fit between the two outermost rotating rings 6 and the side walls on the left and right sides of the filtering space 202 also forms a filtering channel 60 .

[0072] One of the first air zone a and the second air zone b is connected to the air outlet of the fan 3 for receiving the ambient air output from the air outlet of the fan 3, and the other is connected to the air inlet of the heater 4 for inputting the filtered ambient air into the heater 4 for heating.

[0073] As an optional embodiment, a second interface b1 is provided at the bottom of the second air zone b, and the second interface b1 is connected to the air outlet end of the fan 3, so that the ambient air blown out by the fan 3 enters the second air zone b through the second interface b1; a first interface a1 is provided on the side wall of the first air zone a, and the first interface a1 is connected to the air inlet end of the heater 4, so that the ambient air entering the second air zone b flows into the first air zone a after being filtered through the filter channel 60, and then flows into the heater 4 through the first interface a1 of the first air zone a to be heated to form hot air, and finally the hot air flows into the adsorption tower 1 to be regenerated through the hot gas main pipe N4; specifically, the end of the hot gas main pipe N4 away from the second pipeline N2 is connected to the air outlet end of the heater 4.

[0074] In addition, in order to further filter the ambient air flowing out of the first interface a1, in this embodiment, Figure 1As shown, a dust filter 5 capable of filtering dust is connected between the first interface a1 and the air inlet end of the heater 4. At this time, the preheating mechanism 2 is equivalent to a coarse filtering mechanism, and the dust filter 5 is used as a fine filtering mechanism. The ambient air is first filtered by the coarse filtering mechanism to filter out some larger impurities, and then enters the fine filtering mechanism for dust filtering. The existence of the coarse filtering mechanism can reduce the burden of the fine filtering mechanism.

[0075] The heat exchange space 201 described in this embodiment is mainly used to receive the regeneration gas. For example, in this embodiment, a third interface is provided on the side wall of the heat exchange space 201, and the end of the exhaust main pipe M4 away from the first pipeline M2 is connected to the third interface to discharge the regeneration gas discharged from the adsorption tower 1 into the heat exchange space 201 through the third interface. Since the regeneration gas still has a lot of residual heat after being discharged from the adsorption tower 1, it will contact the heat exchange part 611 of the rotating ring 6 when entering the heat exchange space 201 to realize heat exchange, so as to transfer the heat to the rotating ring 6.

[0076] It is worth noting that, in the present embodiment, the parts of the rotating ring 6 constituting the heat exchange part 611 and the filter part 612 are not fixed, but change alternately with the rotation of the rotating ring 6. For example, assuming that the rotating ring 6 is composed of section A and section B, at the beginning, section A of the rotating ring 6 is located in the heat exchange space 201 to constitute the heat exchange part 611, and section B is located in the filter space 202 to constitute the filter part 612; with the rotation of the rotating ring 6, at least part of section A will be transferred into the filter space 202 to constitute the filter part 612, and at the same time, at least part of section B will be transferred into the heat exchange space 201 to constitute the heat exchange part 611. In this process, section A is heated by directly absorbing the heat of the regenerated gas in the heat exchange space 201 before entering the filter space 202. Therefore, when the heated section A is transferred to the filter space 202 as the filter section 612, the ambient air will contact section A for heat exchange when passing through the filter channel 60, and the ambient air will be heated by section A; in this process, section B, which initially serves as the filter section 612, will enter the heat exchange space 201 to exchange heat with the regenerated gas again and be heated, awaiting the next cycle; this cycle is repeated, so that the filter section 612 entering the filter space 202 always has a higher temperature. On the one hand, the ambient air can be filtered first, and on the other hand, the ambient air can be preheated so that the ambient air has a certain amount of heat before entering the heater 4, thereby reducing the energy consumption of the subsequent heater 4 for heating the ambient air.

[0077] In summary, it can be seen that the preheating mechanism 2 in this embodiment can recycle the waste heat of the regeneration gas discharged from the adsorption tower 1 to preheat the ambient air. In addition, it can also filter the ambient air.

[0078] In addition, in this embodiment, Figure 2As shown, an exhaust port K3 is also provided on the side wall of the heat exchange space 201, and the exhaust port K3 is used to discharge the air in the heat exchange space 201. In this embodiment, the exhaust port K3 is preferably arranged on the opposite side of the third interface, and the heat exchange part 611 is located between the two.

[0079] In order to allow the regenerated gas to contact the heat exchange part 611 in a larger range after being discharged from the third interface, in this embodiment, Figure 3 As shown, a plurality of air holes K1 are uniformly distributed in sequence along the axial direction of the rotating ring 6 on the side wall of the heat exchange air, and all the air holes K1 constitute the third interface as a whole; Figure 2 As shown, a cover body K2 is provided on the outside of the heat exchange space 201 to cover the outer ends of all the air holes K1 at the same time. One end of the cover body K2 is closed, and the other end is connected to an end of the exhaust main pipe M4 away from the first pipeline M2. In this way, the regenerated gas discharged from the adsorption tower 1 first enters the cover body K2, and then is dispersed from the cover body K2 to the air holes K1, and is dispersed and discharged from the air holes K1, so that the regenerated gas is dispersed in the heat exchange space 201 to exchange heat with the heat exchange part 611.

[0080] In addition, in this embodiment, in order to enable the rotating ring 6 to rotate circumferentially on the partition 23, as shown in FIG. Figure 7 As shown, two arc-shaped guide grooves 230 for the swivel 6 to pass through are opened on the partition 23 at the position corresponding to the swivel 6, and the axes of the two arc-shaped guide grooves 230 coincide with the axis of the swivel 6. The swivel 6 passes through the two arc-shaped guide grooves 230 and can rotate in the arc-shaped guide grooves 230.

[0081] In order to improve the sealing performance of the swivel 6 at the position of the arc-shaped guide groove 230 so that the heat exchange space 201 and the filter space 202 can be isolated from each other, in the present embodiment, a seal 231 is provided between the arc-shaped guide groove 230 and the swivel 6, wherein the seal 231 can be a sealing sleeve, such as a rubber sleeve, and the sealing sleeve is an arc-shaped structure having substantially the same arc as that of the swivel 6, which is fixed in the arc-shaped guide groove 230, and the swivel 6 moves through between the sealing sleeves, and the sealing performance between the two is achieved through the sealing sleeves.

[0082] Of course, in other optional embodiments, the seal 231 may also be a packing seal filled between the swivel 6 and the arc guide groove 230, or a mechanical seal may be used, which is not specifically limited here.

[0083] It is worth mentioning that the seal 231 not only plays a sealing role, but also can scrape the side walls on both sides of the swivel 6 when the swivel 6 rotates circumferentially, thereby scraping off the dust attached to the side walls of the swivel 6. The significance of such a setting is that, as the swivel 6 is filtering the ambient air, the side walls of the swivel 6 will be attached with dust brought in by the ambient air. If too much dust accumulates, it will affect the heat exchange performance of the swivel 6. Therefore, in this embodiment, the dust attached to the side walls of the swivel 6 can be scraped off by the scraping of the seal 231 to reduce the amount of dust on the swivel 6, which is equivalent to a self-cleaning process.

[0084] In the present embodiment, since the rotating ring 6 is rotatably mounted on the partition 23, it is not possible to directly set a rotating shaft coaxially arranged with the rotating ring 6 to limit the rotation of the rotating ring 6 around its own axis. Therefore, in the present embodiment, the preheating mechanism 2 also includes a guide assembly 8 for guiding the circumferential rotation of the rotating ring 6.

[0085] like Figure 4 As shown, the guide assembly 8 includes a plurality of guide wheel groups corresponding one to one with the rotating ring 6, one rotating ring 6 corresponds to one guide wheel group; the guide wheel group includes a plurality of guide wheels 81 which are arranged on the partition 23 and whose rotation axis is parallel to the axial direction of the rotating ring 6.

[0086] The guide wheels 81 are all against the inner ring of the rotating ring 6 to realize that the rotating ring 6 is limited to rotate around its own axis under the interference of the guide wheel group. At this time, it is equivalent to relying on the guide wheels 81 in the guide wheel group to expand in the inner ring of the rotating ring 6 to center the rotating ring 6, so that the rotating ring 6 can only rotate around its own axis.

[0087] Based on the need for centering, the number of guide wheels 81 of the guide wheel assembly can be two, and the two guide wheels 81 are distributed at both ends of the same diameter line of the swivel 6.

[0088] Of course, there can be more than two, for example, Figure 10-12 As shown, this embodiment shows a situation where each guide wheel group includes four guide wheels 81, and the four guide wheels 81 are distributed at the four vertex positions of a rectangle centered on the center of the rotating ring 6.

[0089] Among them, the guide wheel 81 can be a pulley structure with a wheel groove, and the inner ring of the rotating ring 6 is in contact with the wheel groove. In this way, the guide wheel 81 can not only limit the circumferential rotation of the rotating ring 6, but also the side walls of the wheel groove can limit the axial deviation of the rotating ring 6.

[0090] The guide assembly 8 further includes guide shafts 82 having the same number as the guide wheels 81 in the guide wheel assembly. For example, the present embodiment shows a situation where there are four guide shafts 82 .

[0091] like Figure 4As shown, the guide shaft 82 is arranged on the partition 23, and the guide wheels 81 at the same position in each guide wheel group are coaxially installed on the same guide shaft 82.

[0092] Of course, in other optional embodiments, the guide shaft 82 may not be provided, but each guide wheel 81 may be individually provided on the partition 23 .

[0093] In this embodiment, in order to ensure the sealing of the connection between the swivel 6 and the partition 23 (i.e., the position of the arc-shaped guide groove 230), the outer surface of the swivel 6 is preferably a smooth outer surface, so it is impossible to set an uneven structure such as a gear or meshing teeth on the swivel 6 as a driving component 22 to drive the swivel 6 to rotate; therefore, in this embodiment, in order to be able to drive the swivel 6 to rotate circumferentially without destroying the smoothness of the surface of the swivel 6; in this embodiment:

[0094] like Figure 3 and Figure 4 As shown, the driving assembly 22 includes a motor 221, a shift fork 222 and a penetrating rod 225. The driving assembly 22 drives the rotating ring 6 to reciprocate in the circumferential direction. Specifically:

[0095] The fork 222 is driven by the motor 221 to reciprocate and swing around an axis parallel to the axial direction of the rotating ring 6. Preferably, the rotation axis of the fork 222 is located directly above the rotation axis of the rotating ring 6. Figure 8 As shown, one end of the fork 222 is rotatably connected to the side wall in the heat exchange space 201, and the motor 221 is fixed to the outside of the casing 21; the fork 222 is provided with a fork groove 223 extending along the length direction of the fork 222, and the fork groove 223 is opened at one end away from the rotating end of the fork 222.

[0096] like Figure 4 As shown, the through rod 225 is penetrated on all the swivels 6 along the axial direction of the swivel 6; one end of the through rod 225 close to the fork 222 constitutes a force-bearing end, and the force-bearing end is inserted into the fork groove 223, and the force-bearing end can move in the fork groove 223.

[0097] In this way, when working, the motor 221 drives the fork 222 to rotate. As the fork 222 rotates, the force-bearing end in the slot will be pulled to flip, so that the through rod 225 and all the swivels 6 rotate together. When the force-bearing end rotates from one side of the swivel 6 to the other side, the motor 221 starts to drive the fork 222 to reverse, and this cycle is repeated, so that the force-bearing end reciprocates above the partition 23, thereby driving the swivel 6 to reciprocate.

[0098] Since the force-bearing end needs to be inserted into the fork groove 223, in order to facilitate assembly, the force-bearing end of the through rod 225 can be automatically inserted into the fork groove 223. In this embodiment:

[0099] The force-bearing end can be elastically extended and retracted along the axial direction of the through rod 225. When the force-bearing end is not subjected to external force in the axial direction, Fig. 9 In the state shown, the force-bearing end maintains a tendency to extend axially outward so as to remain in the fork groove 223 .

[0100] The force-bearing end may directly adopt an existing elastic pin, which is installed on the end of the penetration rod 225.

[0101] It can also be, Fig. 9 As shown, a slideway 228 is provided at the end of the through rod 225 and is arranged axially along the through rod 225. A movable shaft 226 that can move axially is slidably inserted into the slideway 228. A spring 227 is also provided in the slideway 228. One end of the spring 227 is abutted against or fixed to the inner end of the slideway 228, and the other end is abutted against or fixed to the inner end of the movable shaft 226. The elastic force of the spring 227 pushes the movable shaft 226 to have a tendency to extend outward, and the movable shaft 226 constitutes a force-bearing end, and the end of the movable shaft 226 is inserted into the fork groove 223.

[0102] In this embodiment, Figure 10-12 As shown, the fork 222 can be limited to reciprocating rotation between 0°-180°. At the 0° and 180° positions, the fork 222 is substantially parallel to the plate surface of the partition 23; for example, Figure 8 and Fig.10 As shown, two proximity switches 229 can be respectively set on the side wall of the heat exchange space 201 at the 0° and 180° positions of the fork 222. When the fork 222 approaches the proximity switch 229, the motor 221 starts to reverse, so that the fork 222 reciprocates between 0°-180°.

[0103] like Fig. 9 As shown, a guide surface 224 is formed on the side wall of the fork 222 facing the penetrating rod 225, and the guide surface 224 is an arcuate surface or an inclined surface. The guide surface 224 is constructed so that when the force-bearing end moves on the guide surface 224 toward the side close to the slot, the force-bearing end overcomes its own elastic force and gradually contracts axially under the resistance of the guide surface 224.

[0104] Thus, when the force-bearing end needs to be inserted into the fork groove 223, the motor 221 first drives the fork 222 to remain at the 0° position (see Fig.10 shown position) or 180° position (refer to Fig.12As shown in the figure, at this time, the force-bearing end is outside the fork groove 223, and then the swivel 6 is manually rotated, or the motor 221 drives the fork 222 to flip, so that the force-bearing end (i.e., the movable shaft 226) rotates circumferentially relative to the fork 222. When the force-bearing end contacts the guide surface 224 and gradually moves toward the side close to the fork groove 223, under the resistance of the guide surface 224, the movable shaft 226 will overcome the elastic force of the spring 227 and gradually shrink axially inward. When the end of the movable shaft 226 reaches the fork groove 223, the movable shaft 226 will automatically insert into the fork groove 223 under the push of the spring 227.

[0105] In addition, in this embodiment, Figure 2 As shown, the partition 23 can be detachably assembled in the work space 20 along the vertical direction. For example, a circle of steps 203 is provided on the side wall of the work space 20, and the partition 23 is placed on the steps 203 and connected to the steps 203 by bolts.

[0106] When it is necessary to pull the partition plate 23 together with the rotating ring 6 upward from the working space 20, firstly drive the shift fork 222 to flip to the 90° position, such as Fig.11 As shown; then unscrew the bolts and lift the partition 23 upward. During this process, since one end of the fork groove 223 is open, the force-bearing end (i.e., the movable shaft 226) of the partition 23 will move upward along the fork groove 223 during the upward lifting process, and finally be pulled out from the open end of the fork groove 223 to disengage from the shift fork 222.

[0107] Since the rotating ring 6 needs to penetrate the partition 23, it is obviously not easy to achieve this process with a complete rotating ring 6. Therefore, in this embodiment, Figure 6 As shown, the partition 23 includes two unit plates 232, and the two unit plates 232 are detachably connected to each other along a first direction. The first direction here can be understood as a direction perpendicular to the axial direction of the rotating ring 6; for example, in this embodiment, the two unit plates 232 can be connected and fixed by bolts. In addition, in order to improve the connection stability between the two unit plates 232, in this embodiment, Figure 6 and Figure 7 As shown, the butting surfaces of the two unit plates 232 are respectively provided with a tenon 233 and a tenon groove 234 extending along the first direction. When the two unit plates 232 are butted, the tenon 233 is inserted into the tenon groove 234 to strengthen the connection stability between the two unit plates 232.

[0108] like Figure 7As shown, the rotating ring 6 includes two half rings 61, and the ends of the two half rings 61 are butt-jointed to form a complete annular rotating ring 6. The two half rings 61 are detachably butt-jointed along the first direction. For example, in this embodiment, the two half rings 61, one of which is provided with a plug C2 extending along the first direction at both ends, and the other half ring 61 is provided with a plug C1 extending along the first direction at both ends; the two half rings 61 are butt-jointed and fixed by screws. Specifically, the plug C1 is provided with a vertically extending screw hole 613, and the outer peripheral wall of the half ring 61 provided with the plug C2 is provided with a vertically extending countersunk hole 614. When butt-jointing, the plug C1 is inserted into the plug C2, and then the screw passes through the countersunk hole 614 and is threadedly connected in the screw hole 613 to achieve the fixation of the two half rings 61.

[0109] The two half rings 61 are movably inserted on the two unit plates 232, and the two ends of the baffle 7 are fixed on the lower walls of the two unit plates 232 by screws. When the two unit plates 232 are connected, the two half rings 61 are connected to form the rotating ring 6. In this way, when assembling, the two half rings 61 are first inserted into the arc guide grooves 230 on the two unit plates 232, and the angles of the two half rings 61 are adjusted so that the plug C1 is aligned with the socket C2. Then, the two unit plates 232 are connected along the first direction so that the plug C1 is inserted into the socket C2. Then, the two unit plates 232 are locked with bolts, and the two half rings 61 are locked with screws.

[0110] In this embodiment, Figure 2 As shown, the housing 21 includes a shell 211 and a cover plate 212 . The cover plate 212 is connected to the top of the shell 211 by screws, and the cover plate 212 and the shell 211 together form the working space 20 .

[0111] Example 2

[0112] The difference between this embodiment and the first embodiment is that in this embodiment, the driving assembly 22 is different from the driving assembly 22 in the first embodiment. In the first embodiment, the driving assembly 22 can only drive the rotating ring 6 to reciprocate within a certain range, while in this embodiment, the driving assembly 22 can drive the rotating ring 6 to rotate continuously in the circumferential direction. Specifically:

[0113] In this embodiment, the driving assembly 22 includes a motor (not shown in the figure), wherein at least one guide shaft 82 constitutes a driving shaft, and the driving shaft is rotatably connected to the partition 23 and driven to rotate by the motor; the guide wheel 81 on the driving shaft is fixedly connected to the driving shaft, and the guide wheel 81 on the driving shaft drives the rotating ring 6 to rotate circumferentially.

[0114] During operation, the motor drives the driving shaft to rotate, and then drives the guide wheel 81 on the driving shaft to rotate. Since the guide wheel 81 and the inner ring of the rotating ring 6 are in contact with each other, the guide wheel 81 drives the rotating ring 6 to rotate continuously in the circumferential direction under the action of the friction between the two.

[0115] Therefore, in this embodiment, in order to increase the friction between the guide wheel 81 and the inner ring of the rotating ring 6, the guide wheel 81 is preferably a rubber wheel.

[0116] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A zero-gas-loss blower type desiccant dryer, comprising two adsorption towers for alternately drying compressed air, and a regeneration system for alternately regenerating the desiccant in the two adsorption towers; the regeneration system comprises a fan and a heater, the fan is used to blow ambient air into the heater for heating to form hot air, the hot air is used to pass into the adsorption tower to regenerate the desiccant in the adsorption tower and generate regenerated gas to be discharged from the adsorption tower; characterized in that, Also includes a preheating mechanism; The preheating mechanism includes a casing with a working space inside and a driving assembly; a partition is provided in the working space, and the working space is divided into a filtering space and a heat exchange space for receiving regeneration gas by the partition; a plurality of rotating rings are arranged in sequence along the axial direction, and the rotating rings are driven by the driving assembly to rotate circumferentially; the rotating rings penetrate the partition to form a heat exchange part and a filtering part in the heat exchange space and the filtering space respectively; the filtering part divides the filtering space into a first air zone and a second air zone, and a filtering channel connecting the first air zone and the second air zone is formed between two adjacent filtering parts; one of the first air zone and the second air zone is connected to the air outlet end of the fan, and the other is connected to the air inlet end of the heater; The clearance between the two outermost rotating rings and the side walls on the left and right sides of the filtering space also forms a filtering channel.

2. A zero air loss blower type desiccant according to claim 1, characterized in that: The preheating mechanism also includes a guide assembly for guiding the circumferential rotation of the rotating ring, the guide assembly includes a plurality of guide wheel groups corresponding one to one with the rotating ring, the guide wheel group includes a plurality of guide wheels arranged on a partition and having a rotation axis parallel to the axial direction of the rotating ring, the guide wheels all abut against the inner ring of the rotating ring so that the rotating ring is limited to rotate around its own axis under the abutment of the guide wheel group.

3. A zero air loss blower type desiccant according to claim 2, characterized in that: The guide assembly also includes guide shafts having the same number as the guide wheels in the guide wheel group. The guide shafts are arranged on the partition plate, and the guide wheels at the same position in each guide wheel group are coaxially arranged on the same guide shaft.

4. A zero air loss blower type desiccant according to claim 3, characterized in that: The driving assembly is used to drive the swivel to rotate continuously in a circumferential direction, and includes a motor, wherein at least one guide shaft constitutes a driving shaft, and the driving shaft is rotatably connected to the partition and driven to rotate by the motor; the guide wheel on the driving shaft is fixedly connected to the driving shaft, and the guide wheel on the driving shaft drives the swivel to rotate in a circumferential direction.

5. A zero air loss blower type desiccant according to claim 2 or 3, characterized in that: The driving assembly is used to drive the swivel to reciprocate in a circumferential direction, and includes a motor, a shift fork and a through rod; the shift fork is driven by the motor to reciprocate and swing around an axis parallel to the axial direction of the swivel; a fork groove extending along the length direction of the shift fork is provided in the shift fork; the through rod is penetrated on all the swivels along the axial direction of the swivel; the end of the through rod close to the shift fork constitutes a force-bearing end, and the force-bearing end is inserted into the fork groove.

6. A zero air loss blower type desiccant according to claim 5, characterized in that: The force-bearing end can elastically expand and contract along the axial direction of the through rod. When the force-bearing end is not subject to external force in the axial direction, the force-bearing end maintains a tendency to extend axially outward to remain in the fork groove. A guide surface is formed on the side wall of the fork facing the through rod, and the guide surface is constructed so that when the force-bearing end moves on the guide surface toward the side close to the slot, the force-bearing end overcomes its own elastic force and gradually contracts axially under the resistance of the guide surface.

7. A zero air loss blower type desiccant according to claim 1, characterized in that: The partition includes two unit plates, and the two unit plates are detachably connected along a first direction; the swivel includes two half rings, wherein the two half rings are detachably connected along a first direction; the two half rings are movably inserted into the two unit plates respectively, and when the two unit plates are connected, the two half rings are connected to form the swivel.

8. The zero-air-loss blower type desiccant dryer according to claim 1, characterized in that: Two arc-shaped guide grooves for the swivel to pass through are provided on the partition plate at positions corresponding to the swivel, and the axes of the two arc-shaped guide grooves coincide with the axis of the swivel. A sealing member is provided between the arc-shaped guide grooves and the swivel.

9. The zero-air-loss blower type desiccant dryer according to claim 1, characterized in that: An arc-shaped baffle is arranged between two adjacent filter parts, and the baffle and the adjacent filter parts are arranged at intervals to form the filter channel; the baffle is arranged on the partition and is kept relatively fixed with the partition.

10. The zero-air-loss blower type desiccant dryer according to claim 1, characterized in that: A dust filter is provided between the preheating mechanism and the heater.

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