Tail gas treatment device for hot air circulating oven

Abstract

The utility model relates to a tail gas treatment device for a hot air circulation oven, which comprises a shell, a first air inlet, a second air inlet and an air outlet, the two ends of the shell are closed, and the shell is provided with an inner cavity; the first air inlet, the second air inlet and the air outlet are independently formed in the outer wall of the shell, the first air inlet, the second air inlet and the air outlet are all communicated with an inner cavity of the shell, and the inner cavity of the shell is filled with adsorption filler; the second air inlet is located between the first air inlet and the air outlet, the second air inlet comprises a straight section and an inclined section, the straight section is fixedly connected to the shell, the inclined section is communicated with the straight section, and the inclined section inclines towards the direction where the first air inlet is located. The flowing speed of inlet gas (tail gas) in the treatment device can be reduced, and the treatment effect of the inlet gas can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of environmental protection equipment and relates to an exhaust gas treatment device, in particular to an exhaust gas treatment device for a hot air circulation oven. Background Art

[0002] Hot air circulation oven usually refers to an oven with heating tube and circulating fan. The air circulation system of hot air circulation oven usually adopts fan circulating air supply mode, so that the air circulation is uniform and efficient; the air source is driven by the circulating air supply motor (using contactless switch) to drive the wind wheel through the heater, and the hot air is sent out through the air duct to the inner room of the oven, and then the used air is sucked into the air duct as the air source for recirculation and heating. The hot air circulation device can achieve rapid drying effect, shorten the production cycle, save energy, improve product quality and other purposes. It is an ideal drying equipment with broad prospects. It is widely used in chemical agriculture, medical and health, plastic machinery, colleges and universities and other fields or places.

[0003] The Chinese utility model patent with the authorization announcement number CN214250379U discloses a hot air circulation device for flocking glue production, which specifically relates to the field of flocking glue production technology, including an air inlet cavity and a baking chamber, wherein the top of the baking chamber is inlaid with an air inlet cavity, the top of the baking chamber is fixedly connected with an exhaust fan, the inside of the air inlet cavity is provided with a dehumidification structure, and the two sides of the air inlet cavity are provided with a heat conduction structure. The application is provided with edge sealing glue, a window, an empty slot, a card slot, an opening, a partition door, a sealing ring, a card plate and a rotating handle. When the device is used, after the flocking glue raw material is put into the baking chamber through the opening for baking, the opening is pulled so that it and the external sealing ring are attached to one end of the opening, and then the rotating handle is rotated to drive the card plate at one end to rotate, and the card plates on both sides are respectively inserted into the inside of the card slot, and the partition door can be positioned through the card slot, and the sealing ring and edge sealing glue ensure the sealing of the inside of the baking chamber during baking, so as to achieve the effect of improving the internal sealing and reducing the outflow of heat energy. However, the hot air circulation device is not equipped with an exhaust gas treatment device. If organic solvents are used in the production of flocking glue, the evaporation of organic solvents will occur, which will not only pollute the environment but also pose a threat to the health of the operating employees.

[0004] The Chinese utility model patent with the authorization announcement number CN208349718U discloses an environmentally friendly hot air circulation oven, with an exhaust port on the top right side of the oven, the exhaust port is connected to the exhaust pipeline and the circulation pipeline, the left side of the oven is connected to the steam inlet, and the power inlet is connected to all the wire interfaces of the entire device. The hot air circulation oven is equipped with an exhaust gas treatment device, which needs to be sent to the condenser for condensation and the demister for dehumidification by means of a dehumidification fan, and finally the condensed water or solvent is discharged from the system for collection; the structure is complex and the cost is high. Summary of the invention

[0005] The utility model provides an exhaust gas treatment device for a hot air circulation oven, so as to realize the treatment of the exhaust gas of the hot air circulation oven.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an exhaust gas treatment device for a hot air circulation oven, which includes a shell, a first air inlet, a second air inlet and an air outlet.

[0007] Both ends of the shell are closed, and the shell has an inner cavity;

[0008] The first air inlet, the second air inlet and the air outlet are independently arranged on the outer wall of the shell, the first air inlet, the second air inlet and the air outlet are all connected to the inner cavity of the shell, and the inner cavity of the shell is filled with adsorption filler;

[0009] The second air inlet is located between the first air inlet and the air outlet, and the second air inlet includes a straight section and an inclined section. The straight section is fixedly connected to the shell, the inclined section is connected to the straight section, and the inclined section is inclined toward the direction of the first air inlet.

[0010] Optimally, the straight section and the inclined section are connected in a smooth transition.

[0011] Furthermore, the angle formed between the straight section and the inclined section is 100-160°.

[0012] Furthermore, the exhaust gas passing through the first air inlet enters into the inner cavity of the shell in a direction perpendicular to the inner wall of the shell.

[0013] Furthermore, the exhaust gas passing through the second air inlet enters into the inner cavity of the shell at an angle with the inner wall of the shell.

[0014] Optimally, a cross-sectional dimension of the first air inlet is smaller than a cross-sectional dimension of the second air inlet.

[0015] Furthermore, a cross-sectional dimension of the first air inlet is smaller than a cross-sectional dimension of the air outlet.

[0016] Optimally, the distance between the second air inlet and the first air inlet is smaller than the distance between the second air inlet and the air outlet.

[0017] Optimally, the shell is made of plastic.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the exhaust gas treatment device for the hot air circulation oven of the utility model can reduce the flow velocity of the intake air (exhaust gas) in the treatment device by setting the first air inlet, the second air inlet and the air outlet of a specific structure, which is beneficial to improving the treatment effect of the intake air. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the tail gas treatment device for the hot air circulation oven of the utility model;

[0020] Figure 2 It is a cross-sectional view of the exhaust gas treatment device for the hot air circulation oven of the utility model. DETAILED DESCRIPTION

[0021] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0022] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0024] Please refer to Figure 1 and Figure 2 The present application provides an exhaust gas treatment device for a hot air circulation oven, which includes a shell 1, a first air inlet 2, a second air inlet 3 and an air outlet 4.

[0025] The front and rear ends of the shell 1 are closed, and the shell 1 has an inner cavity 11; in this embodiment, the shell 1 is preferably a cylindrical structure, and the axis of the inner cavity 11 coincides with the axis of the shell 1. The first air inlet 2, the second air inlet 3 and the air outlet 4 are all arranged on the outer wall of the shell 1, and they are independently connected to the inner cavity 11. The inner cavity 11 of the shell 1 is filled with an adsorption filler (such as commercially available organic solvent adsorption resin SV300, etc.) for adsorbing organic solvents in the hot air circulation oven. When in use, the first air inlet 2 and the second air inlet 3 are connected to the air outlet structure of the hot air circulation oven (usually connected through a pipeline), so that the exhaust gas (or tail gas) in the hot air circulation oven enters the inner cavity 11 of the shell 1 from the first air inlet 2 and the second air inlet 3, and is discharged from the air outlet 4 after being adsorbed by the filler (it can be discharged directly to the outside, or the air outlet 4 can be connected to the hot air circulation oven through a pipeline, and then the treated gas is reintroduced into the hot air circulation oven, which is conducive to improving energy utilization and further improving environmental protection effects).

[0026] In one embodiment of the present application, please refer to Figure 2 The axis of the first air inlet 2 is perpendicular to the axis of the shell 1 (the first air inlet 2 is usually fixed to the shell 1 by integral molding or welding), so that the gas passing through the first air inlet 2 (the exhaust gas in the hot air circulation oven) enters the inner cavity 11 of the shell 1 in a direction perpendicular to the inner wall of the shell 1.

[0027] In one embodiment of the present application, please refer to Figure 2 The structure of the second air inlet 3 is different from that of the first air inlet, and it includes a straight section 31 and an inclined section 32 connected to each other, and the straight section 31 and the inclined section 32 are connected smoothly. Specifically, the straight section 31 is fixed (usually in an integrally formed or welded manner) connected to the housing 1 and extends into the inner cavity 11 (slightly beyond the inner wall of the housing 1), and is parallel to the first air inlet 2; the inclined section 32 is connected to the straight section 31, and the inclined section 32 is biased toward the first air inlet 2 (that is, the inclined section 32 is inclined toward the direction where the first air inlet 2 is located). In this embodiment, the angle formed between the straight section 31 and the inclined section 32 is 100-160° (i.e., the air entering the inner cavity 11 through the second air inlet 3 enters the inner cavity 11 of the shell 1 at an angle with the inner wall of the shell 1), so that the air entering the first air inlet 2 and the second air inlet 3 can collide in the inner cavity 11 to form turbulence, thereby reducing the flow velocity of the air in the inner cavity 11 and improving the effect of the air being adsorbed by the filler. The cross-sectional size of the second air inlet 3 is also preferably larger than the cross-sectional size of the first air inlet 2 (i.e., when the second air inlet 3 and the first air inlet 2 are both tubular structures, the diameter of the second air inlet 3 is larger than the diameter of the first air inlet 2), which is conducive to the full mixing of the air, so as to reduce the flow velocity or diffusion velocity of the air.

[0028] In one embodiment of the present application, please refer to Figure 2 When the air entering the inner cavity 11 of the shell 1 through the second air inlet 3 approaches the first air inlet 2 .

[0029] In one embodiment of the present application, please refer to Figure 1-2 The shell 1 is made of plastic, and can also be made of metal according to actual needs (specifically, different choices can be made according to the temperature of the intake air).

[0030] In one embodiment of the present application, please refer to Figure 1-2 , the second air inlet 3 is located between the first air inlet 2 and the air outlet 4, but compared with the air outlet 4, the second air inlet 3 is closer to the first air inlet 2 (mainly the straight section 31, that is, the distance between the second air inlet 3 and the first air inlet 2 is smaller than the distance between the second air inlet 3 and the air outlet 4). The structure and manner in which the air outlet 4 is arranged on the shell 1 are basically the same as those of the first air inlet 2; the difference is that the cross-sectional size of the air outlet 4 is also larger than the cross-sectional size of the first air inlet 2 (that is, when the air outlet 4 and the first air inlet 2 are both tubular structures, the diameter of the air outlet 4 is larger than the diameter of the first air inlet 2); it is also preferred that the cross-sectional size of the air outlet 4 is larger than or equal to the cross-sectional size of the second air inlet 3 to avoid excessive pressure in the shell 1.

[0031] The working principle of the present application is: the present application provides an exhaust gas treatment device for a hot air circulation oven, two air inlets and one air outlet are arranged on the outer wall of the exhaust gas treatment device, the interior of the exhaust gas treatment device is filled with adsorption filler, the two air inlets are connected to the hot air circulation oven, the gas (containing organic solvent vapor) in the hot air circulation oven enters the exhaust gas treatment device through the two air inlets, one of the air inlets (i.e., the end air inlet) and the air outlet are located at the two ends of the exhaust gas treatment device, and the other air inlet is located between the upper air inlet and the air outlet of an air inlet, and the flow direction of the gas flowing into the middle air inlet is biased toward the aforementioned end air inlet of the upper air inlet, so that the ozone intake flowing in through the upper air inlet of the end air inlet collides with the intake flowing in through the middle air inlet to form turbulence, thereby slowing down the flow speed of the ozone intake in the exhaust gas treatment device, and then making the ozone intake treatment cleaner.

[0032] The exhaust gas treatment device for the hot air circulation oven provided in the present application has a simple structure, can effectively improve the degree of exhaust gas treatment for the hot air circulation oven, and make the exhaust gas treatment cleaner and more thorough. When in use, an air inlet pipe and an air outlet pipe can be set on the box body of the hot air circulation oven, so that the air inlet pipe and the air outlet pipe correspond to the two air inlets and one air outlet of the exhaust gas treatment device, so as to realize the installation of the exhaust gas treatment device (the circulation structure of the hot air circulation oven itself can be used to transport the exhaust gas, and an air supply or negative pressure structure can be added to ensure the gas circulation of the hot air circulation oven and the exhaust gas treatment device).

[0033] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An exhaust gas treatment device for a hot air circulation oven, characterized in that: It includes a shell, a first air inlet, a second air inlet and an air outlet. Both ends of the shell are closed, and the shell has an inner cavity; The first air inlet, the second air inlet and the air outlet are independently arranged on the outer wall of the shell, the first air inlet, the second air inlet and the air outlet are all connected to the inner cavity of the shell, and the inner cavity of the shell is filled with adsorption filler; The second air inlet is located between the first air inlet and the air outlet, and the second air inlet includes a straight section and an inclined section. The straight section is fixedly connected to the shell, the inclined section is connected to the straight section, and the inclined section is inclined toward the direction of the first air inlet.

2. The tail gas treatment device for hot air circulation oven according to claim 1, characterized in that: The straight section and the inclined section are connected in a smooth transition.

3. The tail gas treatment device for hot air circulation oven according to claim 1 or 2, characterized in that: The angle formed between the straight section and the inclined section is 100-160°.

4. The tail gas treatment device for hot air circulation oven according to claim 3, characterized in that: The exhaust gas passing through the first air inlet enters the inner cavity of the shell in a direction perpendicular to the inner wall of the shell.

5. The tail gas treatment device for hot air circulation oven according to claim 4, characterized in that: The exhaust gas passing through the second air inlet enters the inner cavity of the shell at an angle with the inner wall of the shell.

6. The tail gas treatment device for hot air circulation oven according to claim 1, characterized in that: A cross-sectional dimension of the first air inlet is smaller than a cross-sectional dimension of the second air inlet.

7. The tail gas treatment device for hot air circulation oven according to claim 1 or 6, characterized in that: The cross-sectional size of the first air inlet is smaller than the cross-sectional size of the air outlet.

8. The tail gas treatment device for hot air circulation oven according to claim 1, characterized in that: The distance between the second air inlet and the first air inlet is smaller than the distance between the second air inlet and the air outlet.

9. The tail gas treatment device for hot air circulation oven according to claim 1, characterized in that: The shell is made of plastic.

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