Fan system for separation and purification

Abstract

The invention belongs to the field of fluid machinery, and discloses a separation and purification fan system, a purification device capable of being applied to a centrifugal fan comprises a separation and purification assembly and a surfactant water flow assembly, and the separation and purification assembly comprises a rotatable filler supporting frame and a porous filler; the surface active agent water flow assembly comprises a surface active agent box body and a water inlet pipeline; the water inlet pipeline is used for conveying liquid containing a surface active agent into the porous filler of the separation and purification assembly; a grease separation assembly capable of synchronously rotating is further arranged at the front end of the filler supporting frame; in addition, a fixed multi-layer arc-shaped flow guide structure is arranged on the front side of the grease separation assembly. The separation and purification assembly capable of coaxially rotating with the impeller of the centrifugal fan is utilized, and under cooperation of the surfactant water flow assembly, purification of pollutants in air flow conveyed to the centrifugal fan can be achieved. The correspondingly obtained centrifugal fan with the purification function has the characteristic of integration, and is small in size and high in purification and separation efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of fluid machinery, and more specifically, relates to a separation and purification fan system. Background Art

[0002] Centrifugal fans are widely used in the fields of smoke exhaust and pollutant separation and purification. When used in places where sticky pollutants such as oil are discharged, in order to ensure clean discharge, an oil fume separation device is often added at the fan inlet, and it is composed of a variety of physical separation and purification combinations. At the same time, in order to avoid the separation device from interfering with the fan inlet airflow, there are long pipes before and after the separation device for steady and even flow, which brings the following technical problems:

[0003] 1. Poor purification effect and short life: Most of the grease condenses on the pipes, and the actual concentration of pollutants entering the purification equipment is reduced, resulting in low separation efficiency of the purification device itself, short life of the entire exhaust system, and increased safety risks such as grease accumulation and fire.

[0004] 2. Large pipe network resistance: In order to overcome the multi-stage filtration and purification device and ensure the uniformity of the distribution of the flow velocity, the entire pipeline system is relatively long, which makes the fan power large and the energy consumption high, and also brings noise and vibration problems.

[0005] 3. The system size is large and the installation environment is greatly restricted, especially in household oil fume emission scenarios. Summary of the invention

[0006] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a separation and purification fan system, wherein the structure of each component of the purification device and their coordinated working mode are improved, and the separation and purification component that can rotate coaxially with the centrifugal fan impeller is used. With the cooperation of the surfactant water flow component, the pollutants in the airflow delivered to the centrifugal fan can be purified. The corresponding centrifugal fan with purification function has the characteristics of integration, small size, and high purification and separation efficiency.

[0007] To achieve the above object, according to one aspect of the present invention, a purification device applicable to a centrifugal fan is provided, characterized in that it comprises a separation purification component and a surfactant water flow component, wherein:

[0008] The separation and purification component comprises a rotatable filler support frame, a porous filler arranged in the filler support frame, and a fixed support shell distributed along the periphery of the filler support frame; the separation and purification component is used to be arranged at the front end of the centrifugal fan impeller and can rotate coaxially with the centrifugal fan impeller;

[0009] The surfactant water flow component is separate from the separation and purification component, and includes a surfactant box and a water inlet pipeline. The surfactant box is used to contain liquid containing a surfactant; the water inlet pipeline is connected to the surfactant box and is used to transport the liquid containing a surfactant to the porous filler of the separation and purification component;

[0010] A synchronously rotatable grease separation component is also provided at the front end of the filler support frame, comprising a plurality of spokes arranged radially; and a fixed multi-layer arc-shaped flow guide structure is provided at the front side of the grease separation component;

[0011] During operation, the airflow transmitted axially along the rotating shaft to the centrifugal fan will first pass through the rotating separation and purification component. Under the interaction between the porous filler and the liquid containing the surfactant, the liquid containing the surfactant in the centrifugal state is used to purify the pollutants in the airflow; the surfactant waste liquid obtained after treatment will be collected by the guide structure, and at the same time, the purified airflow will continue to be transmitted axially to the centrifugal fan impeller.

[0012] As a further preferred embodiment of the present invention, the porous filler is specifically activated carbon, molecular sieve material or MOFS material;

[0013] The packing support frame is provided with packing chambers, each packing chamber is in the shape of a centrifugal blade channel, and the porous packing is distributed in the packing chambers;

[0014] Preferably, the filler support frame presents an arc leaf-shaped structure; the porous filler is distributed in the filler chamber in a honeycomb structure.

[0015] As a further preferred embodiment of the present invention, the multi-layer circular arc-shaped flow guiding structure is specifically a double-layer circular arc-shaped flow guiding structure.

[0016] As a further preferred embodiment of the present invention, the grease separation component and the filler support frame are integrally formed and can rotate synchronously.

[0017] As a further preferred embodiment of the present invention, the liquid containing a surfactant is specifically a mixture of a surfactant and water;

[0018] Preferably, the surfactant is an anionic surfactant or a composite surfactant in which an anion is combined with other ions.

[0019] According to another aspect of the present invention, the present invention provides a centrifugal fan with a purification function, characterized in that it includes a centrifugal fan and the above-mentioned purification device.

[0020] As a further preferred embodiment of the present invention, the packing support frame of the separation and purification component shares a motor rotating shaft with the centrifugal fan impeller;

[0021] Preferably, the diameter of the packing support frame of the separation and purification component is 180-220 mm, and the rotation speed is 800-1200 rpm.

[0022] As a further preferred embodiment of the present invention, the number of spokes in the grease separation assembly, the number of packing chambers, and the number of blades in the centrifugal fan impeller are not multiples of each other;

[0023] Preferably, the number of spokes in the grease separation assembly meets the range of 40 to 60, the number of stuffing chambers meets the range of 12 to 28, and the number of blades in the centrifugal fan impeller meets the range of 48 to 66.

[0024] According to another aspect of the present invention, the present invention provides a control method for the above-mentioned centrifugal fan with purification function, which is characterized in that by real-time sensing of pollutant concentration information in the original airflow before purification treatment and the purified airflow at the outlet of the centrifugal fan volute, a machine learning method is used to construct a quantitative effect relationship between the fan speed, the flow rate of the liquid containing the surfactant and the difference in inlet and outlet pollutant concentrations, and then the current and the flow rate of the liquid containing the surfactant are controlled in real time to achieve a balance among the difference in inlet and outlet pollutant concentrations, power and the flow rate of the liquid containing the surfactant.

[0025] As a further preferred embodiment of the present invention, the pollutant concentration information includes PM 2.5 and TVOC.

[0026] Compared with the prior art, the above technical solutions conceived by the present invention can achieve the following

[0027] Beneficial effects:

[0028] 1. The purification device in the present invention can effectively improve the oil fume purification effect. The present invention sets a separation and purification component that can rotate coaxially with the centrifugal fan impeller. With the participation of the surfactant water flow component, the surfactant water flow system diffuses into the filler along the surroundings under the action of centrifugal separation, and the polluted gas enters from the axial direction. The particulate pollutants and gaseous pollutants merge with the liquid flow containing the surfactant in the filler. After further decomposition and purification, the purified airflow enters the impeller; the polluted liquid flow (i.e., the surfactant waste liquid) is introduced into the exhaust oil path under the centrifugal action. In this way, a vertical two-phase contact flow can be formed in the direction of the airflow (i.e., the airflow moves along the axial direction, and the water flow moves along the radial direction, which are perpendicular to each other), and the polluted gas is separated and purified to achieve the coordinated treatment of pollutants (such as particulate matter and VOCs). Further, a grease separation component that can rotate synchronously can be set at the front end of the separation and purification component. In this way, when working, the rotating grease separation component can filter or cut a large amount of grease into small particles of grease, and the remaining small particles of pollutants and gaseous pollutants are purified in the separation and purification component.

[0029] 2. The present invention can reduce the resistance of the fan system. The present invention adopts an integrated and short-process design concept. The filler adopts a porous structure. The polluted airflow is guided by the porous medium. Due to the rotational centrifugal effect, the airflow has a certain pre-rotation before entering the impeller and is more evenly distributed, especially in the upper half of the centrifugal impeller inlet area. The flow loss and system resistance are reduced, and the aerodynamic noise caused by flow separation is reduced, thereby reducing the power of the fan system.

[0030] 3. The separation and purification component of the present invention is small in size, and the impeller and the filler support frame can adopt an integrated drive design, which is an integrated oil fume separation and purification system. At the same time, a fixed multi-layer circular arc guide structure (such as a double-layer circular arc guide structure) is arranged on the front side of the grease separation component. The impeller inlet guide area is connected by a multi-layer guide structure to ensure smooth air and water paths.

[0031] 4. Furthermore, the centrifugal fan with purification function obtained by the present invention can realize the coupled regulation of the liquid flow containing surfactant and the air volume in real time by sensing the pollutant concentration information (such as PM 2.5 and TVOC), and adopts machine learning to construct the quantitative relationship between the speed of the fan system, the flow rate of the liquid flow containing surfactants, and the inlet and outlet pollutant concentrations, and then adjust the current and the flow rate of the liquid flow containing surfactants in real time to achieve the best balance between pollutant concentration and power (the power is positively correlated with the speed and air volume of the fan system). BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the fan system with separation and purification of the present invention.

[0033] Figure 2 It is a schematic diagram of the overall principle of the fan system with separation and purification of the present invention.

[0034] Figure 3 It is a schematic diagram of the connection relationship between the separation and purification system and the surfactant water flow system in the present invention.

[0035] Figure 4 It is a structural schematic diagram of the separation and purification system in the present invention.

[0036] Figure 5 It is a structural schematic diagram of a packing support frame and a packing chamber arranged therein in the present invention. Figure 5 The 1, 2, 3, and 4 marked in the example correspond to the four packing chambers respectively. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1

[0039] like Figure 1 As shown, the separation and purification fan system of the present invention includes three parts, namely, the fan system, the separation and purification system, and the surfactant water flow system. Figure 2 As shown, the working principle is as follows:

[0040] Under the suction of the fan system, the airflow first enters along the axial direction, passes through the oil and grease separation, and then enters the separation filling module. At the same time, the water flow of the water system diffuses from the rotating axis along the radial direction. The airflow and water flow fully contact and react, and the water flow decomposes and dissolves VOC and fine particles, and filters the polluted airflow. Under the action of centrifugal suction, the water flow is discharged along the multi-layer guide structure. Under the action of the centrifugal fan, the purified airflow is turned from the axial direction to the radial direction and then discharged. The entire airflow channel process is short, and the separation module and the fan system module are connected through an integrated drive shaft, and are driven by a main motor with the impeller.

[0041] Specifically, Figure 3 As shown, the surfactant water flow system is mainly composed of a surfactant box and a water inlet pipe, wherein the surfactant box is mainly filled with a liquid containing a surfactant (for example, it can be a mixture of a surfactant and water), and the recommended surfactant type is an anion or a composite type in which an anion is combined with other ions (such as sodium dioctyl succinate sulfonate, sodium dodecylbenzene sulfonate; of course, the specific surfactant used can be selected according to the nature of the oil smoke).

[0042] like Figure 3 , Figure 4 As shown, the separation and purification system is mainly composed of a grease separation module, a rotating separation filler module and other components. The motor rotating shaft is connected to the rotating separation filler module, which can drive the rotating separation filler module to rotate; wherein, the grease separation module is mainly a corrosion-formed strip type (similar to the conventional setting, the number of spokes is recommended to be staggered with the multiple of the number of blades to avoid abnormal sound); as shown Figure 5 As shown, the packing support frame is provided with a packing chamber (such as Figure 5As shown in the figure, adjacent support modules constitute the wall of a packing chamber, so that several packing chambers are formed along the circumferential direction. Each packing chamber is in the shape of a centrifugal blade channel. The packing chamber is filled with activated carbon, molecular sieve or MOFS material according to a preset structure (such as granular, layered, honeycomb). Each packing chamber is in the shape of a centrifugal blade channel, which is convenient for forming pre-rotation and improving the working ability of the blade. In addition, the packing is supported by the packing support frame to ensure its strength.

[0043] In addition, the outlet of the water inlet pipe of the surfactant water flow system is located in the rotating separation filler module and close to the rotating axis, so that the liquid flow containing the surfactant flowing out through the outlet can drip onto the filler of the rotating separation filler module under the action of gravity, and then be discharged along the multi-layer guide structure under the action of the rotating centrifugal suction of the rotating separation filler module.

[0044] The above-mentioned separation and purification fan system has the following structural features:

[0045] ① The air path and water path are designed independently, with one air flow moving axially and the other moving radially (such as Figure 2 As shown in the figure, the contact reaction conditions are constructed through the packing module. The liquid flow containing surfactant introduced by the surfactant water flow system diffuses into the packing (activated carbon, molecular sieve or MOFS material) along the four sides under the action of centrifugal separation. The polluted gas enters from the axial direction and contacts the packing. The liquid flow of the surfactant decomposes and absorbs the oil and flows out radially. The polluted airflow enters the impeller from the axial direction under the suction of the centrifugal fan. The gas path is perpendicular to the direction of water flow during the whole process, so that on the one hand, sufficient reaction contact can be achieved, and on the other hand, mutual interference can be avoided, thereby improving the efficiency of separation and purification.

[0046] ② Synchronous structure of grease separation and purification module: The grease separation and purification module adopts synchronous movement, and can be especially processed as one piece. For example, first, the supporting structure of the grease separation module is made of thin sheet metal and connected to the grease separation module by welding. The filler module is supported by a support frame. The overall module is a whole. When working at the same time, the operating speed is the same, which can ensure the smoothness of the gas path and facilitate maintenance.

[0047] ③ Integrated drive of centrifugal fan system and separation purification system: The centrifugal fan and separation purification system are driven by the same motor and connected by a long shaft. The installation order is to install the fan first, then locate and fix with the locating pin, and then install the separation purification system. In this way, only one motor is used and there is no need to add an additional drive motor. The whole structure is also more compact, which improves applicability.

[0048] ④ Double-layer guide structure: This embodiment adopts a double-layer guide structure (such as Figure 2As shown in the figure), the polluted water flow and part of the grease are diverted respectively, so that the two oil circuits are independent to avoid the occurrence of oil dripping and the like.

[0049] ⑤ Multi-frequency staggered design: the number of spokes, the number of filling chambers and the number of blades of the grease separation module do not present a multiple relationship with each other. The further preferred number of spokes is 40-60, the number of filling chambers is 12-28, and the number of blades is 48-66;

[0050] ⑥ Intake distortion suppression: In order to improve the axial distortion of the centrifugal fan intake, the design concept of the intake guide vane is adopted. The packing chamber presents the structure of a centrifugal flow channel, and the packing support frame presents an arc blade structure. The airflow passes through the centrifugal flow channel to form a pre-swirl, thereby ensuring the uniformity of the wind speed distribution on the air inlet surface, thereby improving the flow of airflow inside the centrifugal fan and reducing noise.

[0051] ⑦ Low resistance design: In order to reduce the resistance of the packing module, based on theoretical and simulation analysis, the relationship between the parameters of adsorption and purification materials (activated carbon, molecular sieve, zeolite, metal organic framework materials (MOFs), nano), structure (granular, layered, honeycomb), rotation speed, diameter, number of packing chambers and wind resistance of the separation and purification module was constructed, and the final specific parameter optimization range was obtained: material optimization: activated carbon, molecular sieve, MOFs; structure optimization: honeycomb; separation and purification module rotation speed: 800-1200rpm, separation and purification module diameter (i.e., the diameter of the packing support frame): 180-220mm; number of packing chambers 12-28. The resistance of the packing module shows a trend of decreasing after the number of packing chambers increases, and increases with the increase of the rotation speed of the separation and purification module; the honeycomb adsorption material has a small wind resistance, and the resistance also increases first and then decreases with the diameter of the separation module, which can be set according to actual conditions.

[0052] Furthermore, the separation and purification fan system obtained based on the present invention can use the dynamic control algorithm strategy of the sensing data to sense the pollutant concentration information such as PM2.5 at the front end of the air inlet and the end of the fan system in real time. 2.5 and TVOC (for example, PM 2.5 Sensors, TVOC sensors for PM 2.5 and TVOC concentration), and uses machine learning to build a quantitative relationship between the fan system's speed, water flow rate, and inlet and outlet pollutant concentrations, and then regulate current and water flow in real time to ensure the optimal balance between pollutant concentration and power.

[0053] Comparative Example 1

[0054] This comparative example 1 is substantially similar to the example 1, except that no grease separation module is provided.

[0055] At this time, a large amount of grease enters from the air inlet and directly enters the packing module without being filtered. The grease accumulates on the surface of the packing module, resulting in weakened adsorption, which affects the purification effect and service life of the packing module.

[0056] Comparative Example 2

[0057] This comparative example 1 is substantially similar to the example 1, except that the packing module and the surfactant water flow system are not provided.

[0058] At this time, the grease separation module can only separate the grease, and a large amount of VOCs in the oil fume directly passes through the impeller. During the process, a part of it interacts with fine particles and adheres to the surface of the impeller, and a part of it is directly discharged through the oil fume and enters the atmosphere, causing environmental pollution.

[0059] Comparative Example 3:

[0060] This comparative example 1 is substantially similar to the example 1, except that no flow guide structure is provided.

[0061] At this time, the grease filtered by the grease separation module is directly dispersed to various places in the inner cavity of the machine under the action of centrifugation, making it difficult to clean. At the same time, the water flow system is also due to the lack of diversion. The water flow is dispersed in the inner cavity or enters the impeller under the action of gravity and centrifugation, causing oil and water dripping everywhere.

[0062] The purification device obtained by the present invention can work in conjunction with a centrifugal fan. Other components of the centrifugal fan (such as a motor, a motor bracket, a volute, etc.) can be arranged with reference to relevant prior art, and the present invention will not introduce them in detail.

[0063] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A purification device applicable to a centrifugal fan, characterized in that: It includes a separation and purification component and a surfactant water flow component, wherein: The separation and purification component comprises a rotatable filler support frame, a porous filler arranged in the filler support frame, and a fixed support shell distributed along the periphery of the filler support frame; the separation and purification component is used to be arranged at the front end of the centrifugal fan impeller and can rotate coaxially with the centrifugal fan impeller; The surfactant water flow component is separate from the separation and purification component, and includes a surfactant box and a water inlet pipeline. The surfactant box is used to contain liquid containing a surfactant; the water inlet pipeline is connected to the surfactant box and is used to transport the liquid containing a surfactant to the porous filler of the separation and purification component; A synchronously rotatable grease separation component is also provided at the front end of the filler support frame, comprising a plurality of spokes arranged radially; and a fixed multi-layer arc-shaped flow guide structure is provided at the front side of the grease separation component; During operation, the airflow transmitted axially along the rotating shaft to the centrifugal fan will first pass through the rotating separation and purification component. Under the interaction between the porous filler and the liquid containing the surfactant, the liquid containing the surfactant in the centrifugal state is used to purify the pollutants in the airflow; the surfactant waste liquid obtained after treatment will be collected by the guide structure, and at the same time, the purified airflow will continue to be transmitted axially to the centrifugal fan impeller.

2. The purification device according to claim 1, characterized in that: The porous filler is specifically activated carbon, molecular sieve material or MOFS material; The packing support frame is provided with packing chambers, each packing chamber is in the shape of a centrifugal blade channel, and the porous packing is distributed in the packing chambers; Preferably, the filler support frame presents an arc leaf-shaped structure; the porous filler is distributed in the filler chamber in a honeycomb structure.

3. The purification device according to claim 1, characterized in that: The multi-layer circular arc-shaped flow guiding structure is specifically a double-layer circular arc-shaped flow guiding structure.

4. The purification device according to claim 1, characterized in that: The grease separation component and the filler support frame are integrally formed and can rotate synchronously.

5. The purification device according to claim 1, characterized in that: The liquid containing a surfactant is specifically a mixture of a surfactant and water; Preferably, the surfactant is an anionic surfactant or a composite surfactant in which an anion is combined with other ions.

6. A centrifugal fan with purification function, characterized in that: It comprises a centrifugal fan and a purification device as claimed in any one of claims 1 to 5.

7. The centrifugal fan with purification function as claimed in claim 6, characterized in that: The packing support frame of the separation and purification component and the centrifugal fan impeller share the motor rotating shaft; Preferably, the diameter of the packing support frame of the separation and purification component is 180-220 mm, and the rotation speed is 800-1200 rpm.

8. The centrifugal fan with purification function as claimed in claim 6, characterized in that: The number of spokes in the grease separation assembly, the number of packing chambers, and the number of blades in the centrifugal fan impeller are not multiples of each other; Preferably, the number of spokes in the grease separation assembly meets the range of 40 to 60, the number of stuffing chambers meets the range of 12 to 28, and the number of blades in the centrifugal fan impeller meets the range of 48 to 66.

9. The control method of a centrifugal fan with purification function as claimed in any one of claims 6 to 8, characterized in that: By real-time sensing of the pollutant concentration information in the original airflow before purification treatment and the purified airflow at the outlet of the centrifugal fan volute, a machine learning method is used to construct a quantitative-effect relationship between the fan speed, the flow rate of the liquid containing the surfactant and the difference in the inlet and outlet pollutant concentrations, and then the current and the flow rate of the liquid containing the surfactant are controlled in real time to achieve a balance among the difference in the inlet and outlet pollutant concentrations, power and the flow rate of the liquid containing the surfactant.

10. The control method according to claim 9, characterized in that: The pollutant concentration information includes PM 2.5 and TVOC.

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