Gas mixing device

Abstract

The utility model provides a kind of gas mixing device, belong to waste gas treatment field.The gas mixing device includes shell, with the cavity for gas to flow, and with the cavity communication import end and export end;First mixing unit, including venturi injector;Second mixing unit, including multiple porous sieve plate;Third mixing unit, including: front plate and back plate, the front plate and the back plate form with the front plate hole and back plate hole communication multiple passages, the passage is used for gas to flow.The utility model is by being provided with first mixing unit, second mixing unit and third mixing unit, can be mixed while removing oily particle or oil stain carried in gas to reaction gas, reduce the process step of waste gas treatment, reduce waste gas treatment cost.The all components of the device are integrated in a shell, facilitate the transportation of device, also reduce the floor area of device.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a gas mixing device. Background Technology

[0002] Flue gas purification primarily refers to the treatment of industrial waste gases generated in industrial sites, such as particulate matter, flue gas, odorous gases, and toxic and harmful gases. Common types of flue gas purification include factory flue gas purification, workshop dust gas purification, organic waste gas purification, odor removal, acid and alkali waste gas purification, and chemical waste gas purification. It is particularly relevant in chemical, environmental protection, and energy industries where rapid and uniform mixing of multi-component gases is required. For example, waste gas emitted from chemical plants needs to be treated to meet emission standards before being released into the air. Flue gas treatment typically involves mixing waste gas with ozone, which oxidizes the waste gas to remove it. However, because waste gas contains oil or oily particles, directly mixing it with ozone makes removal difficult, reducing the effectiveness of the treatment. To improve efficiency, the oil or oily particles are first removed from the waste gas. Then, the waste gas is mixed with ozone, which oxidizes the waste gas to achieve the desired removal. The above-mentioned waste gas treatment methods not only require multiple treatment devices, but also involve complex processes, increasing the cost of waste gas treatment.

[0003] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a gas mixing device to solve the problems of uneven mixing of ozone and waste gas, and the need for multiple treatment devices, complex treatment process, and increased cost of waste gas treatment.

[0005] To solve the above-mentioned technical problems, this utility model provides a gas mixing device, comprising:

[0006] The housing has a cavity for gas flow, and an inlet and an outlet communicating with the cavity;

[0007] The first mixing unit includes a Venturi injector, the air inlet pipe of which is connected to the inlet end, and the air outlet of which is connected to the cavity.

[0008] The second mixing unit includes multiple porous sieve plates, which are spaced apart along the gas flow direction;

[0009] The third mixing unit includes:

[0010] The front panel has multiple front panel holes that serve as gas inlets;

[0011] The rear plate is provided with multiple rear plate holes as gas outlets;

[0012] The front plate and the rear plate form multiple channels that communicate with the holes in the front plate and the rear plate, and the channels are used for gas flow.

[0013] Preferably, the first mixing unit, the second mixing unit, and the third mixing unit are distributed at intervals along the gas flow direction.

[0014] Preferably, the positions of the second mixing unit and the third mixing unit along the gas flow direction can be interchanged.

[0015] Preferably, the Venturi injector further includes a throat and a diffuser, one end of the throat is connected to the air inlet pipe, the other end of the throat is connected to the diffuser, and the angle between the connection point of the throat and the diffuser and the opposite direction of the gas flow is an acute angle.

[0016] Preferably, the distance between two adjacent porous sieve plates is arbitrary.

[0017] Preferably, the pore size of the porous sieve plate is 1μm-10μm.

[0018] Preferably, the number of porous sieve plates is greater than or equal to 6 layers.

[0019] Preferably, the third mixing unit includes a frame and a main body. The frame is fixedly installed on the inner wall of the housing. The main body includes a front plate and a rear plate. The front plate is provided with a plurality of front plate holes as gas inlets, and the rear plate is provided with a plurality of rear plate holes as gas outlets.

[0020] Preferably, the front panel includes a plurality of front panel units; the front panel unit is a V-shaped plate structure;

[0021] The rear plate includes several rear plate units, and the rear plate units are V-shaped plate structures;

[0022] The two ends of the V-shaped plate structure formed by the front plate unit are connected to the two ends of the V-shaped plate structure formed by the rear plate unit to form a channel.

[0023] The frame is provided with an air inlet and an air outlet, and the air inlet and air outlet are connected to the channel.

[0024] Preferably, the gas mixing device is made of stainless steel or PP.

[0025] Compared with the prior art, the gas mixing device of this utility model has the following advantages:

[0026] This invention employs a first mixing unit, a second mixing unit, and a third mixing unit. First, a Venturi injector is used to initially mix the waste gas and ozone. Then, a porous sieve plate further mixes the gases, preventing dead zones in the mixture. Finally, the third mixing unit further improves the mixing uniformity. By using multiple mixing units, the reactant gases can be mixed simultaneously, while oily particles or oil stains carried in the waste gas are removed, reducing the number of process steps and lowering the cost of waste gas treatment. All components of this device are integrated into a single housing, facilitating transportation and reducing the device's footprint. The second and third units both use mechanical methods to improve the mixing uniformity of the reactant gases and remove oil stains and oil particles from the gas, saving energy and reducing energy consumption. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the gas mixing device in one embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view along AA in one embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the front plate and front plate holes in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the rear plate and the rear plate hole in one embodiment of the present invention;

[0031] In the picture,

[0032] 100 - Housing; 110 - Inlet end;

[0033] 120 - Exit end; 200 - Venturi injector;

[0034] 210 - Intake pipe; 220 - Throat pipe;

[0035] 230 - Diffuser tube; 240 - Outlet;

[0036] 300 - Perforated sieve plate; 400 - Third mixing unit;

[0037] 410 - Frame; 420 - Main body;

[0038] 421 - Back panel; 422 - Channel;

[0039] 423-front plate; 424-front plate hole;

[0040] 425 - Back plate hole; 426 - Valley line;

[0041] 427 - Peak line; 428 - Front panel unit;

[0042] 429 - Rear panel unit. Detailed Implementation

[0043] To make the objectives, advantages, and features of this utility model clearer, the gas mixing device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the explanation of the embodiments of this utility model. It should be understood that the drawings do not necessarily show the specific structure of this utility model to scale, and the illustrative features used to explain certain principles of this utility model in the drawings are also drawn in a slightly simplified manner. Specific design features of this utility model disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they are used. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts having the same function, omitting repeated descriptions. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Traditional gas mixing equipment suffers from problems such as low mixing efficiency, high energy consumption, and complex structure. While Venturi jets can achieve rapid mixing, their output pressure is limited, and mechanical stirring devices are prone to dead zones and have high maintenance costs.

[0047] The core idea of ​​this utility model is to provide a gas mixing device that can mix waste gas and reactive gases such as ozone while removing oily particles or oil stains carried in the waste gas, thereby reducing the footprint of the device, reducing the process steps of waste gas treatment, and reducing the cost of waste gas treatment.

[0048] To achieve the above-mentioned goals, this utility model provides a gas mixing device, which includes... Figures 1 to 4 A specific embodiment of a gas mixing device is disclosed. The gas mixing device includes: a housing 100, a cavity for gas flow, and an inlet end 110 and an outlet end 120 communicating with the cavity. A first mixing unit includes a Venturi injector 200, the inlet pipe 210 of which is connected to the inlet end 110, and the outlet 240 of which is communicating with the cavity. A second mixing unit includes a plurality of porous sieve plates 300, the plurality of porous sieve plates 300 being arranged along the gas flow direction (i.e., ...). Figure 1 The third mixing unit 400 includes: a front plate 423 with multiple front plate holes 424 serving as gas inlets; and a rear plate 421 with multiple rear plate holes 425 serving as gas outlets; wherein the front plate 423 and the rear plate 421 form multiple channels 422 communicating with the front plate holes 424 and the rear plate holes 425, and the channels 422 are used for gas flow.

[0049] The first mixing unit, the second mixing unit, and the third mixing unit 400 are along the gas flow direction (i.e., Figure 1 The distribution of the arrowheads (direction).

[0050] The positions of the second mixing unit and the third mixing unit 400 along the gas flow direction can be interchanged. That is, in the housing 100, the first mixing unit, the second mixing unit, and the third mixing unit 400 can be distributed at intervals along the gas flow direction, or the first mixing unit, the third mixing unit 400, and the second mixing unit can be distributed at intervals along the gas flow direction.

[0051] The housing 100 can be any shape, such as a cylinder or cuboid. The housing 100 can be made of materials such as stainless steel or PP. The specific shape and size of the housing 100 are only required to meet actual production needs; in this embodiment, there are no specific requirements. The housing 100 has an inlet end 110 and an outlet end 120. The mixed gas enters the inlet pipe 210 of the Venturi injector 200 through the inlet end 110. The outlet end 120 is used to discharge the mixed gas. The mixed gas includes waste gas to be treated (e.g., VOCs) and ozone. The waste gas is treated by reacting ozone with it in an oxidation reaction. The treated waste gas is discharged from the outlet end 120.

[0052] For example, the first mixing unit includes a Venturi injector 200, the air inlet pipe 210 of which is connected to the inlet end 110, and the air outlet 240 of which is in communication with the cavity.

[0053] Specifically, refer to Figure 1 As shown, the Venturi injector 200 also includes a throat 220 and a diffuser 230. One end of the throat 220 is connected to the intake pipe 210, and the other end of the throat 220 is connected to the diffuser 230. The angle α between the connection point of the throat 220 and the diffuser 230 in the opposite direction of gas flow is an acute angle. That is, Figure 1 In this context, α represents an acute angle. By setting the angle α between the connection point of the throat 220 and the diffuser 230 in the opposite direction of gas flow to an acute angle, when the mixed gas flows from the throat 220 to the diffuser 230, the mixed gas impacts the sidewall of the throat 220, thereby removing oil and oily particulate pollutants from the exhaust gas. The Venturi injector 200 can be made of 316 stainless steel, with a throat designed as a 30° inclined, thickened wall structure to improve corrosion resistance and service life. High-pressure gas forms a negative pressure zone through the supersonic nozzle, entraining secondary gas into the mixing chamber; the mixing ratio can be adjusted by the nozzle pressure. It should be noted that the specific structure and principle of the Venturi injector 200 are existing technologies familiar to those skilled in the art and will not be described in detail here.

[0054] For example, the second mixing unit includes a plurality of porous sieve plates 300, which are spaced apart. The spacing between the porous sieve plates 300 can be adjusted arbitrarily. The distance between two adjacent porous sieve plates 300 is arbitrary. The number of porous sieve plates 300 is greater than or equal to 6 layers, which improves the uniformity of the mixing of the reactant gases.

[0055] Specifically, refer to Figure 1As shown, multiple spaced porous sieve plates 300 are arranged near the outlet 240 of the Venturi injector 200. When the mixed gas passes through the porous sieve plates 300, the enhanced turbulence effect through airflow dispersion effectively removes oil and oily particles from the mixed gas, avoiding dead zones and uneven gas mixing. The spacing of the porous sieve plates can be adjusted to accommodate different gas viscosities and flow rates. The pore size of the porous sieve plates 300 is 1μm-10μm. That is, the pore size of the porous sieve plates 300 can be 1μm, 5μm, 10μm, or any value within the range of 1μm-10μm. By setting the pore size of the porous sieve plates 300 to 1μm-10μm, oil and oily particles in the mixed gas can be removed, while ensuring that the exhaust gas can pass smoothly through the porous sieve plates 300, preventing the intercepted oil and oily particles from clogging the porous sieve plates 300.

[0056] For example, the reference Figures 1 to 4 As shown, the third mixing unit 400, also known as a labyrinthine baffle, includes a front plate 423 and a rear plate 421. The front plate 423 includes several front plate units 428; each front plate unit 428 has a V-shaped plate structure, and its opening is aligned with the direction of gas flow. The rear plate 421 includes several rear plate units 429, each rear plate unit 429 has a V-shaped plate structure, and its opening is opposite to the direction of gas flow. The two ends of the V-shaped plate structure formed by the front plate units 428 connect with the two ends of the V-shaped plate structure formed by the rear plate units 429 to form channels 422. The third mixing unit 400 includes a frame 410 and a main body 420. The frame 410 is fixedly installed on the inner wall of the housing 100. The frame 410 is used to fix the main body 420. The main body 420 includes a front plate 423 with multiple front plate holes 424 serving as gas inlets; and a rear plate 421 with multiple rear plate holes 425 serving as gas outlets. The front plate 423 and rear plate 421 form multiple channels 422 communicating with the front plate holes 424 and rear plate holes 425, allowing gas to flow through. The frame 410 has air inlets and outlets, which communicate with the channels 422. Specifically, see... Figures 1 to 4As shown, both the frame 410 and the main body 420 can be made of stainless steel or PP material. The front plate 423 has a pleated structure composed of multiple valley lines 426 and multiple peak lines 427. A front plate hole 424 is located at the pleats, serving as a gas inlet. The front plate 423 is composed of several front plate units 428. The front plate units 428 are designed in a "V" shape. Similarly, the rear plate 421 has a pleated structure composed of multiple valley lines 426 and multiple peak lines 427. A rear plate hole 425 is located on one side of the rear plate 421, serving as a gas outlet. The rear plate 421 is composed of several rear plate units 429. The rear plate units 429 are designed in a "V" shape. The two ends of the front plate units 428 are connected to the two ends of the rear plate units 429 respectively, forming a channel 422 structure. That is, the main body 420 is formed by a series of channel 422 structures connected together. The mixed gas enters the channel 422 through the front plate hole 424. The gas undergoes an acceleration and deceleration process, causing it to continuously collide with the front plate 423 and the rear plate 421 due to its inertia. This further mixes the gas, extending the residence time and promoting micro-mixing, thanks to the staggered arrangement of PP material baffles. It also further removes oil and oily particles. The mixed gas escapes through the rear plate hole 425. The angles of the front plate 423 and the rear plate 421 can be adjusted to accommodate different gas viscosities and flow rates.

[0057] It should be noted that, in order to achieve complete removal of exhaust gas, the mixed gas can be circulated through the first mixing unit, the second mixing unit, and the third mixing unit 400 to improve the uniformity of the mixed gas, thereby further improving the removal effect of oil and oily particles in the exhaust gas, and further improving the treatment effect of the exhaust gas. The gas mixing device is made of either stainless steel or PP. It can be used for mixing food-grade gases.

[0058] In a specific example, Example 1:

[0059] When treating sulfur-containing waste gas, the Venturi injector 200 mixes the waste gas with the oxidant. After the reaction is enhanced by the porous sieve plate 300, the labyrinth baffle ensures complete contact, and the desulfurization rate can reach 95%.

[0060] Example 2:

[0061] Used for food-grade CO2 mixing, it features a 300mm porous PP sieve plate and a labyrinth baffle, and the CO2 mixing meets FDA standards.

[0062] This invention employs a first mixing unit, a second mixing unit, and a third mixing unit 400. First, a Venturi injector 200 performs initial mixing of the gas. Then, a porous sieve plate 300 further mixes the gas, preventing mixing dead zones. Finally, the third mixing unit 400 further improves mixing uniformity. The Venturi injector achieves millisecond-level initial mixing. Next, the porous sieve plate 300 enhances mass transfer, and a labyrinthine baffle achieves refined homogenization. By using multiple mixing units, the reactant gases can be mixed simultaneously, while oily particles or contaminants carried in the exhaust gas are removed, reducing the number of steps in the exhaust gas treatment process and lowering costs. All components of this device are integrated into a single housing 100, facilitating transportation and reducing the device's footprint. The second and third units both use mechanical methods to improve the mixing uniformity of the reactant gases and remove oil and oily particles from the gas, saving energy and reducing energy consumption. Using the gas mixing device provided in this embodiment, gas mixing efficiency is increased by 3 times, and energy consumption is reduced by 50%. Because of its design with no moving parts, this gas mixing device can operate without maintenance. Furthermore, the Venturi injector 200, the porous sieve plate 300, and the labyrinth baffle are integrated into the housing 100. Through its modular structural design, the gas mixing device can be quickly assembled and cleaned.

[0063] In summary, the above embodiments have provided detailed descriptions of different configurations of the gas mixing device. Of course, the above descriptions are only descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention in any way. The present invention includes, but is not limited to, the configurations listed in the above embodiments. Those skilled in the art can draw inferences from the above embodiments. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A gas mixing device, characterized in that, include: The housing has a cavity for gas flow, and an inlet and an outlet communicating with the cavity; The first mixing unit includes a Venturi injector, the air inlet pipe of which is connected to the inlet end, and the air outlet of which is connected to the cavity. The second mixing unit includes multiple porous sieve plates, which are spaced apart along the gas flow direction; The third mixing unit includes: The front panel has multiple front panel holes that serve as gas inlets; The rear plate is provided with multiple rear plate holes as gas outlets; The front plate and the rear plate form multiple channels that communicate with the holes in the front plate and the rear plate, and the channels are used for gas flow.

2. The gas mixing device according to claim 1, characterized in that, The first mixing unit, the second mixing unit, and the third mixing unit are distributed at intervals along the gas flow direction.

3. The gas mixing device according to claim 1, characterized in that, The positions of the second and third mixing units along the gas flow direction can be interchanged.

4. The gas mixing device according to claim 1, characterized in that, The Venturi injector also includes a throat and a diffuser. One end of the throat is connected to the air inlet pipe, and the other end of the throat is connected to the diffuser. The angle between the connection point of the throat and the diffuser and the opposite direction of the gas flow is an acute angle.

5. The gas mixing device according to claim 1, characterized in that, The distance between two adjacent porous sieve plates is arbitrary.

6. The gas mixing device according to claim 1, characterized in that, The pore size of the porous sieve plate is 1μm-10μm.

7. The gas mixing device according to claim 1, characterized in that, The number of porous sieve plates is greater than or equal to 6 layers.

8. The gas mixing device according to claim 1, characterized in that, The third mixing unit includes a frame and a main body. The frame is fixedly installed on the inner wall of the housing. The main body includes a front plate and a rear plate. The front plate is provided with a plurality of front plate holes as gas inlets, and the rear plate is provided with a plurality of rear plate holes as gas outlets.

9. The gas mixing device according to claim 8, characterized in that, The front panel includes several front panel units; each front panel unit is a V-shaped plate structure. The rear plate includes several rear plate units, and the rear plate units are V-shaped plate structures; The two ends of the V-shaped plate structure formed by the front plate unit are connected to the two ends of the V-shaped plate structure formed by the rear plate unit to form a channel. The frame is provided with an air inlet and an air outlet, and the air inlet and air outlet are connected to the channel.

10. The gas mixing device according to claim 1, characterized in that, The gas mixing device is made of either stainless steel or PP.

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