Medical waste treatment post-tail gas filtering device

Abstract

The application relates to the technical field of medical waste treatment, in particular to a tail gas filtering device after medical waste treatment. The filtering device comprises a box body, an air inlet is arranged at the bottom of the box body, a fan is arranged at the top of the box body, and the air outlet of the fan is communicated with the external environment; two layers of activated carbon filter layers and high-efficiency filters are sequentially and spacedly arranged in the box body from bottom to top; a first flow guide plate is arranged at the end of a first air distribution space away from the air inlet, a second flow guide plate is arranged on the side close to the air inlet, and a gap is left between the second flow guide plate and the bottom surface of the box body; a second air distribution space is formed between the two layers of activated carbon filter layers, and a third flow guide plate is arranged in the middle of the second air distribution space; the lower edges of the first flow guide plate and the second flow guide plate are both inclined to the direction of the air inlet, and the inclination direction of the third flow guide plate is opposite to that of the second flow guide plate. The application can make the tail gas more uniformly distributed in the filtering device, and improve the consistency of consumable use.

Description

Technical Field

[0001] This application relates to the field of medical waste treatment technology, and in particular to a medical waste exhaust gas filtration device. Background Technology

[0002] Medical waste refers to waste generated by medical and health institutions during medical treatment, prevention, health care and other related activities that has direct or indirect infectiousness, toxicity and other hazards.

[0003] After medical waste is crushed and heat-treated for disinfection, it will produce a large amount of exhaust gas containing harmful substances, which needs to be rendered harmless.

[0004] Existing exhaust gas treatment devices have the following drawbacks: Activated carbon, filters, and other consumables are mostly of a single, integrated design, requiring replacement as a whole during maintenance. However, uneven airflow distribution leads to varying levels of consumable usage in different locations. In areas with high airflow, consumables are consumed more quickly, shortening their overall lifespan. Furthermore, consumables in areas with low airflow are not fully utilized during replacement, resulting in waste and increasing medical waste disposal costs. Utility Model Content

[0005] The purpose of this application is to provide a medical waste treatment exhaust gas filtration device that can more evenly distribute the medical waste treatment exhaust gas to various locations of the filtration device consumables, thereby improving the consistency of consumable consumption rate.

[0006] The medical waste treatment exhaust gas filtration device provided in this application includes a housing and a fan; An air inlet is provided at the bottom of the housing, and a fan is provided at the top. The air intake of the fan is located on the top surface of the housing, and the air outlet of the fan is connected to the external environment. The chamber is provided with at least two layers of activated carbon filter and one layer of high-efficiency filter at intervals along the gas flow direction. A first air distribution space is formed between the bottom activated carbon filter layer and the bottom surface of the box. A first guide plate is provided at the end of the first air distribution space away from the air inlet, and a second guide plate is provided on the side of the first air distribution space close to the air inlet. A gap is left between the lower edge of the second guide plate and the bottom surface of the box. A second air distribution space is formed between the two lowest adjacent activated carbon filter layers, and a third guide plate is set in the middle of the second air distribution space; The lower edges of the first and second guide vanes are inclined toward the air inlet, and the inclination direction of the third guide vane is opposite to that of the second guide vane.

[0007] In a preferred embodiment, the height of the gap between the lower edge of the second guide plate and the bottom surface of the box is 50% to 60% of the height of the first air distribution space; At the same horizontal level, the distance from the first guide plate to the air inlet is 2.5 to 4 times the distance from the second guide plate to the air inlet.

[0008] In a preferred embodiment, the angle between the first guide plate and the second guide plate and the horizontal plane is 35°~60°; The angle between the third guide plate and the horizontal plane is 30°~50°.

[0009] In a preferred embodiment, a gap is left between the lower edge of the third guide plate and the upper surface of the bottommost activated carbon filter layer.

[0010] In a preferred embodiment, at least one of a negative ion generator and an ultraviolet lamp is disposed on the inner top surface of the housing, near the air intake of the fan.

[0011] In a preferred embodiment, the sidewalls of the housing are provided with several sets of trays spaced apart along the height direction, and the activated carbon filter layer and the high-efficiency filter are both mounted on the trays by a pull-out method.

[0012] In a preferred embodiment, the activated carbon filter layer includes an activated carbon tray and a plurality of activated carbon packets; the activated carbon tray is densely provided with mesh. The activated carbon packets are laid side by side on the activated carbon tray.

[0013] In a preferred embodiment, the mesh area of ​​the activated carbon tray is divided into a central mesh area and a side mesh area; the mesh diameter of the central mesh area is smaller than that of the side mesh area, and the mesh density of the central mesh area is greater than that of the side mesh area.

[0014] In a preferred embodiment, the upper edges of the second guide plate and the third guide plate are respectively disposed on the lower surface of the activated carbon tray above them.

[0015] In a preferred embodiment, the bottom surface of the tank is further provided with a removable water collection tank.

[0016] Compared with the prior art, this application has the following beneficial effects: By setting up multiple guide vanes, the exhaust gas entering the filter device is guided to be distributed relatively evenly to various positions of the filter device consumables, especially increasing the exhaust gas flow rate at the edges and corners of the consumables, thereby improving the consistency of the consumable consumption rate and reducing the exhaust gas treatment cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A first-view schematic diagram of the medical waste treatment exhaust gas filtration device provided in the embodiments of this application; Figure 2 A second-view schematic diagram of the medical waste treatment exhaust gas filtration device provided in the embodiments of this application; Figure 3 A third-view schematic diagram of the medical waste treatment exhaust gas filtration device provided in the embodiments of this application; Figure 4 This is a schematic diagram showing the flow direction of exhaust gas inside the chamber. Figure 5 This is a schematic diagram of an activated carbon tray; Figure label: 1-Box housing; 2-Air inlet; 3-Fan; 4-Air outlet; 5-First activated carbon tray; 501-Left mesh area; 502-Middle mesh area; 503-Right mesh area; 6-Second activated carbon tray; 7-High-efficiency filter; 8-Ultraviolet lamp; 9-First guide plate; 10-Second guide plate; 11-Third guide plate; 12-Water collection tank; 13-Activated carbon bag; 14-Panel. Detailed Implementation

[0019] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, but rather includes changes that will be apparent after understanding the disclosure of this application, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted. The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent after understanding the disclosure of this application. Throughout this specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. Conversely, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between. As used herein, the term "and / or" includes any one of the relevant items listed and any combination of any two or more of them. Although terms such as "first," "second," and "third" may be used herein to describe individual components, assemblies, regions, layers, or portions, these components, assemblies, regions, layers, or portions are not limited by these terms. More precisely, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as such in the examples may also be referred to as the second component, assembly, region, layer, or part. For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device in use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element.Therefore, the term "above" includes both "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly. The terminology used herein is for describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprising," "including," and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. Variations in the shapes shown in the figures may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the figures but include changes in shape that occur during manufacturing. The features of the examples described herein may be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible as will be apparent upon understanding the disclosure of this application.

[0020] like Figures 1 to 5 As shown, this embodiment provides a medical waste treatment exhaust gas filtration device, including a housing 1 and a fan 3; An air inlet 2 is provided at the bottom of the housing 1, and a fan 3 is provided at the top. The air intake of the fan 3 is located on the top surface of the housing 1, and the air outlet 4 of the fan 3 is connected to the external environment. When the fan 3 is working, it provides a negative pressure environment for the inside of the housing 1.

[0021] Inside the housing 1, along the gas flow direction, i.e. from bottom to top, at least a first activated carbon filter layer, a second activated carbon filter layer, and a high-efficiency filter 7 are sequentially spaced at intervals.

[0022] The core function of activated carbon is to adsorb odor molecules, volatile organic compounds (VOCs), and some harmful gases in medical waste exhaust gas; the core function of high-efficiency particulate air (HEPA) filters is to precisely intercept tiny suspended particles in exhaust gas, preventing biological pollutants (such as bacteria and viruses) or dust from spreading to the outside world.

[0023] A first air distribution space is formed between the first activated carbon filter layer and the bottom surface of the box 1. A first guide plate 9 is provided at the end of the first air distribution space away from the air inlet 2. A second guide plate 10 is provided on the side of the first air distribution space close to the air inlet 2, and a gap is left between the lower edge of the second guide plate 10 and the bottom surface of the box 1. A second air distribution space is formed between the first activated carbon filter layer and the second activated carbon filter layer, and a third guide plate 11 is set in the middle of the second air distribution space. The lower edges of the first guide vane 9 and the second guide vane 10 are inclined toward the air inlet 2, and the inclination direction of the third guide vane 11 is opposite to that of the second guide vane 10.

[0024] By setting up multiple guide plates, the exhaust gas entering the filtration device is guided to be distributed relatively evenly to various positions of the first activated carbon filter layer, the second activated carbon filter layer, and the high-efficiency filter. In particular, the exhaust gas flow rate at the edges and corners of the first activated carbon filter layer, the second activated carbon filter layer, and the high-efficiency filter is increased, thereby improving the consistency of consumable consumption rate, making the best use of materials, and reducing exhaust gas treatment costs.

[0025] More activated carbon filter layers can be added as needed, simply by adding them one by one above the second activated carbon filter layer.

[0026] Because the airflow velocity entering the housing 1 at the air inlet 2 is relatively fast, most of the exhaust gas slows down and moves upward at the end of the first air distribution space, entering the first activated carbon filter layer. This results in less exhaust gas passing through the first activated carbon filter layer near the air inlet 2. The second guide plate 10 can solve part of the problem of exhaust gas distribution uniformity, but in order to further improve the guiding effect, the height of the gap between the lower edge of the second guide plate 10 and the bottom surface of the housing 1 is 50% to 60% of the height of the first air distribution space, and the angle between the second guide plate 10 and the horizontal plane is about 45°, so as to intercept as much of the upper part of the exhaust gas sent in by the air inlet 2 as possible to the first activated carbon filter layer near the air inlet 2.

[0027] At the same horizontal height, the distance from the first guide plate 9 to the air inlet 2 is 2.5 to 4 times the distance from the second guide plate 10 to the air inlet, thus dividing the first air distribution space into two sections proportionally. The front section near the air inlet 2 is smaller. The first activated carbon filter layer corresponding to the rear section of the first air distribution space accounts for about 60% of the entire first activated carbon filter layer in the length direction, while the first activated carbon filter layer corresponding to the front section accounts for about 40% of the entire first activated carbon filter layer in the length direction, which can further improve the utilization rate of activated carbon near the air inlet 2.

[0028] The angle between the first guide vane 9 and the horizontal plane is about 45°, which can distribute the exhaust gas that has passed the second guide vane 10 relatively evenly to the rear part of the first air distribution space.

[0029] The angle between the third guide plate 11 and the horizontal plane is 30°~50°. A gap is left between the lower edge of the third guide plate 11 and the upper surface of the first activated carbon filter layer, dividing the second gas distribution space into a front section and a rear section. After the exhaust gas in the rear section of the first gas distribution space passes through the first activated carbon filter layer, a portion of it is guided by the third guide plate 11 to the front section of the second gas distribution space, thereby making the exhaust gas more evenly distributed in the second gas distribution space, and ensuring that the consumption rate of activated carbon in all parts of the second activated carbon filter layer is basically the same.

[0030] A third air distribution space is formed between the second activated carbon filter layer and the high-efficiency filter 7. After being guided by multiple baffles, the exhaust gas entering the third air distribution space is relatively evenly distributed, which can make the utilization rate at the edge of the high-efficiency filter 7 basically the same as that at the center.

[0031] The first guide plate 9, the second guide plate 10, and the third guide plate 11 are all made of stainless steel, which has good corrosion resistance.

[0032] The second guide plate 10 and the third guide plate 11 are both welded and fixed to the inner wall of the box body 1.

[0033] In a preferred embodiment, a fourth air distribution space is formed above the high-efficiency filter 7. Within this fourth air distribution space, an ultraviolet lamp 8 is installed on the inner top surface of the housing 1, near the air intake of the fan 3. The core function of the ultraviolet lamp 8 is to destroy the DNA / RNA structure of microorganisms (or residual active microorganisms in the exhaust gas) intercepted by the high-efficiency filter, rendering them unable to reproduce and infect. After undergoing multi-stage treatment, the exhaust gas enters the fourth air distribution space, is further inactivated by the ultraviolet lamp 8, and is then discharged through the fan 3.

[0034] A negative ion generator is also installed at the location of the UV lamp 8, working in conjunction with it. The negative ion generator releases negative ions into the air, which can actively adsorb pollutants and purify the air.

[0035] To facilitate the replacement of consumables, several sets of trays 14 are arranged at intervals along the height direction on the side wall of the box 1. The activated carbon filter layer and the high-efficiency filter 7 are both installed on the trays 14 by a pull-out method.

[0036] The first activated carbon filter layer includes a first activated carbon tray 5 and several activated carbon bags 13, which are arranged side-by-side on the first activated carbon tray 5. Similarly, the second activated carbon filter layer includes a second activated carbon tray 6 and several activated carbon bags 13, which are arranged side-by-side on the second activated carbon tray 6.

[0037] Both the first activated carbon tray 5 and the second activated carbon tray 6 are densely covered with mesh. Taking the first activated carbon tray 5 as an example, the mesh area is divided into a central mesh area 502 and two side mesh areas 501 and 503 on the left and right sides. The mesh diameter of the central mesh area 502 is smaller than that of the left mesh area 501 and the right mesh area 503, and the mesh density of the central mesh area 502 is greater than that of the left mesh area 501 and the right mesh area 503.

[0038] Because the fan 3 is located in the middle of the top of the housing 1, the suction force in the middle area of ​​the housing 1 is greater, while the suction force in the two side areas is smaller. Through the design of the mesh, the passage area of ​​the middle mesh area 502 is smaller than that of the left mesh area 501 and the right mesh area 503. This reduces the amount of gas passing through the middle mesh area 502 and increases the amount of gas passing through the left mesh area 501 and the right mesh area 503, thereby improving gas distribution.

[0039] The upper edges of the second guide plate 10 and the third guide plate 11 are respectively disposed on the lower surfaces of the first activated carbon tray 5 and the second activated carbon tray 6.

[0040] In a preferred embodiment, a water collection tank 12 is also provided on the bottom surface of the housing 1 to collect water droplets condensed from the exhaust gas. The water collection tank 12 can be pulled out from the housing 1 for easy cleaning.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A medical waste exhaust gas filtration device, characterized in that, Including the enclosure and the fan; An air inlet is provided at the bottom of the housing, and a fan is provided at the top. The air intake of the fan is located on the top surface of the housing, and the air outlet of the fan is connected to the external environment. The chamber is provided with at least two layers of activated carbon filter and one layer of high-efficiency filter at intervals along the gas flow direction. A first air distribution space is formed between the bottom activated carbon filter layer and the bottom surface of the box. A first guide plate is provided at the end of the first air distribution space away from the air inlet, and a second guide plate is provided on the side of the first air distribution space close to the air inlet. A gap is left between the lower edge of the second guide plate and the bottom surface of the box. A second air distribution space is formed between the two lowest adjacent activated carbon filter layers, and a third guide plate is set in the middle of the second air distribution space; The lower edges of the first and second guide vanes are inclined toward the air inlet, and the inclination direction of the third guide vane is opposite to that of the second guide vane.

2. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, The height of the gap between the lower edge of the second guide plate and the bottom surface of the box is 50% to 60% of the height of the first air distribution space; At the same horizontal level, the distance from the first guide plate to the air inlet is 2.5 to 4 times the distance from the second guide plate to the air inlet.

3. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, The angle between the first guide plate and the second guide plate and the horizontal plane is 35°~60°; The angle between the third guide plate and the horizontal plane is 30°~50°.

4. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, A gap is left between the lower edge of the third guide plate and the upper surface of the bottommost activated carbon filter layer.

5. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, On the inner top surface of the housing, near the air intake of the fan, at least one of a negative oxygen ion generator and an ultraviolet lamp is provided.

6. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, The side wall of the box is provided with several sets of trays at intervals along the height direction, and the activated carbon filter layer and the high efficiency filter are both installed on the trays by a pull-out method.

7. The medical waste treatment exhaust gas filtration device according to claim 6, characterized in that, The activated carbon filter layer includes an activated carbon tray and several activated carbon packets; the activated carbon tray is densely arranged with mesh holes; The activated carbon packets are laid side by side on the activated carbon tray.

8. The medical waste treatment exhaust gas filtration device according to claim 7, characterized in that, The activated carbon tray has a mesh area divided into a central mesh area and a side mesh area; the mesh diameter of the central mesh area is smaller than that of the side mesh area, and the mesh density of the central mesh area is greater than that of the side mesh area.

9. The medical waste treatment exhaust gas filtration device according to claim 7, characterized in that, The upper edges of the second guide plate and the third guide plate are respectively disposed on the lower surface of the activated carbon tray above them.

10. The medical waste treatment exhaust gas filtration device according to claim 1, characterized in that, The bottom surface of the box is also equipped with a removable water collection tank.

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