High-efficiency energy-saving anti-corrosion fan capable of being integrally recycled

Abstract

The invention provides an integrally recoverable high-efficiency energy-saving anti-corrosion fan which comprises a rack, a volute is mounted on the rack, an impeller is mounted in the volute, a motor is mounted on the rear side face of the volute and connected with the impeller, and a fan is mounted on the rear side face of the volute and connected with the impeller. The volute and the impeller are both made of corrosion-resistant, high-hardness and recyclable linear low-density polyethylene material through integral injection molding. The integrally recoverable efficient energy-saving anti-corrosion fan is simple in structure, ingenious in design, small in size, light in weight, low in maintenance, transportation and installation cost and good in anti-corrosion effect, mass production is achieved, the volute and the impeller are made of corrosion-resistant, high-hardness and recoverable linear low-density polyethylene, the whole fan is recoverable, and the environment-friendly requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of fan equipment, and in particular to an overall recyclable, high-efficiency, energy-saving and corrosion-resistant fan. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fans are mainly used in metallurgy, petrochemical, electric power, urban rail transit, textile, shipbuilding and other fields of the national economy and ventilation in various places. In addition to traditional application areas, there will still be great development prospects in more than 20 potential market areas such as comprehensive utilization of coal gangue, new dry clinker technology transformation, energy conservation and comprehensive utilization of resources in the metallurgical industry. From the demand structure of the main fields, general ventilation fans (generally small and medium-sized centrifugal and axial flow fans) are the most widely used, with the largest demand and the largest number of manufacturers. Generally speaking, this type of product is in oversupply. However, although the demand for special-purpose fans (including anti-corrosion fans, high-temperature fans, wear-resistant fans, fire smoke exhaust fans, etc.) is not very large, they need to be treated differently due to the special working environment, because the main material requirements are relatively special.

[0003] In order to achieve the purpose of corrosion prevention, the existing anti-corrosion fans generally use metal structures and are coated with anti-corrosion coatings on the surface. The metal structure of the anti-corrosion fan is large in size and weight, and the production, maintenance, transportation and installation costs are high. Once the internal structure of the anti-corrosion fan is damaged, it is difficult to carry out local repairs and the entire fan needs to be scrapped. There are also fiberglass-reinforced plastics, but although fiberglass-reinforced plastics have good corrosion resistance, they are heavy, cannot be degraded and cannot be recycled, so they need to be improved. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes an integrally recyclable, high-efficiency, energy-saving and anti-corrosion fan, which is made of corrosion-resistant, high-hardness and recyclable linear low-density polyethylene. It has a simple structure, small size, light weight, low production, maintenance, transportation and installation costs, and good anti-corrosion effect.

[0005] In order to realize the above technical scheme, the present invention provides an integrally recyclable high-efficiency energy-saving anti-corrosion fan, comprising: a frame, a volute is mounted on the frame, an impeller is mounted in the volute, a motor is mounted on the rear side of the volute and connected to the impeller, the volute and the impeller are integrally injection molded with a corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material, and the corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material is made by the following method:

[0006] S1, using 110-120 ℃ nitrogen to purge the reactor for 1-2 hours to remove the air, moisture and impurities in the reactor, then at room temperature, add hexane solvent to the reactor, and stir for 5-10 minutes, then inject the catalyst slurry into the reactor, and stir for 5-15 minutes to mix the catalyst slurry with the hexane solvent, then inject 1-butene comonomer and hydrogen required for the reaction into the reactor, and then continuously pass 0.5Mpa of ethylene gas into the reactor, heat the reactor to 80-90 ℃, until polymerization for 1h, after the polymerization is completed, stop the flow of ethylene to the reactor, quickly exhaust to reduce the reactor pressure, and remove unreacted substances, wait for the temperature in the reactor to drop to room temperature, take out the obtained polymer, precipitate in an ethanol solution, filter, and vacuum dry to obtain a linear low-density polyethylene material matrix;

[0007] S2, adding solid microfibrillated cellulose and deionized water in a mass ratio of 1:50 into a blender, and stirring evenly to prepare a microfibrillated cellulose suspension with a mass fraction of 2%, adding the 2% microfibrillated cellulose suspension into a sorbitan oleate solution, and stirring and reacting at 50° C. for 20 minutes, and then pouring the obtained emulsion into a storage tank, and drying it in a forced air drying oven at 50° C. for 2-3 days to obtain microfibrillated cellulose treated with sorbitan oleate;

[0008] S3, adding the microfibrillated cellulose treated with sorbitan oleate obtained in step S2 into xylene, stirring at 90°C for 30 minutes to obtain a microfibrillated cellulose / xylene suspension, then adding the linear low-density polyethylene material matrix obtained in step S1 into the microfibrillated cellulose / xylene suspension, stirring at 120°C for 30 minutes and filtering, then using 95% ethanol solution to wash the filtered microfibrillated cellulose / linear low-density polyethylene mixture for multiple times, and finally drying the washed microfibrillated cellulose / linear low-density polyethylene at 85°C to obtain corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene;

[0009] S4. Melting the corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene prepared in step S3 and injecting it into the injection mold of the volute and impeller to prepare the corrosion-resistant, high-hardness, recyclable volute and impeller.

[0010] Preferably, the reactor used in step S1 is a spherical stirred bed semi-batch reactor, comprising a mass flow meter and a temperature control unit, the temperature is controlled by a cooling coil and an electric heater, and the tolerance of the polymerization temperature is set to ±0.2°C.

[0011] Preferably, the catalyst used in step S1 is a Ziegler-Natta catalyst.

[0012] Preferably, the impeller is a cantilevered closed backward-inclined centrifugal impeller, comprising an inner plate, a center hole is arranged at the center of the inner plate, a driving shaft of the motor passes through the center hole of the inner plate and is fixedly connected to the inner plate through an impeller fixing sleeve, an outer ring is arranged at the front end of the inner plate, the inner plate and the outer ring are connected by a plurality of arc-shaped blades, and an air duct is formed between adjacent arc-shaped blades.

[0013] Preferably, the volute includes a volute body, a conical air inlet pipe is installed at the air inlet of the volute body, the air outlet of the conical air inlet pipe is arranged directly opposite the impeller, an air outlet flange is arranged at the air outlet of the volute body, a cleaning hole is arranged obliquely above the volute body, a cleaning hole cover is covered on the cleaning hole, a drainage hole is arranged obliquely below the volute body, a drainage hole cover is covered on the drainage hole, and the impeller is installed in the cavity of the volute body.

[0014] Preferably, the frame includes a base, a front end of the base is provided with an upwardly protruding volute front bracket, a rear end of the base is provided with an upwardly protruding motor mounting seat, the motor is horizontally mounted on the motor mounting seat, a volute rear fixing frame is provided at the front end of the motor mounting seat, the front end of the volute is fixed to the volute front bracket, and the rear end of the volute is fixed to the volute rear bracket.

[0015] The beneficial effects of the integrally recyclable high-efficiency energy-saving anti-corrosion fan provided by the present invention are: the integrally recyclable high-efficiency energy-saving anti-corrosion fan has a simple structure, ingenious design, small size, light weight, low production, maintenance, transportation and installation costs, good anti-corrosion effect, and the volute and impeller are made of corrosion-resistant, high-hardness, recyclable linear low-density polyethylene. The overall structure is recyclable and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a rear view of the three-dimensional structure of the present invention.

[0018] Figure 3 It is a front view of the present invention.

[0019] Figure 4 It is a schematic diagram of the local structural assembly of the present invention.

[0020] Figure 5 It is an exploded view of the three-dimensional structure of the present invention.

[0021] In the figure: 1. volute; 11. volute body; 12. conical air inlet pipe; 13. air outlet flange; 14. cleaning hole cover; 15. drain hole cover; 16. impeller fixing sleeve; 17. air inlet; 2. impeller; 21. inner plate; 22. outer ring; 23. arc impeller; 3. frame; 31. base; 32. volute front bracket; 33. motor mounting seat; 34. volute rear fixing bracket; 4. motor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1: A highly efficient, energy-saving and corrosion-resistant fan that is entirely recyclable.

[0024] Reference Figures 1 to 5 As shown, an integrally recyclable high-efficiency energy-saving and anti-corrosion fan comprises: a frame 3, wherein the frame 3 comprises a base 31, a front end of the base 31 is provided with an upwardly protruding volute front bracket 32, a rear end of the base 31 is provided with an upwardly protruding motor mounting seat 33, a motor 4 is horizontally mounted on the motor mounting seat 33, a front end of the motor mounting seat 33 is provided with a volute rear fixing bracket 34, a front end of the volute 1 is fixed on the volute front bracket 31, and a rear end of the volute 1 is fixed on the volute rear bracket 34, so as to ensure the stable installation of the volute 1.

[0025] A volute 1 is installed on the frame 3, and the volute 1 includes a volute body 11. A conical air inlet pipe 12 is installed at the air inlet of the volute body 11, and the air outlet of the conical air inlet pipe 12 is arranged directly opposite to the impeller 2. Such a structural design can form a strong wind pressure through the conical air inlet pipe 12 when the impeller 2 rotates, which can ensure sufficient air volume. An air outlet flange 13 is provided at the air outlet of the volute body 11 to facilitate quick connection with an external pipeline. A cleaning hole is provided at the oblique upper side of the volute body 11, and a cleaning hole cover 14 is covered on the cleaning hole to facilitate cleaning inside the volute body 11. The volute body 11 A drain hole is provided obliquely below the volute body 11, and a drain hole cover 15 is provided on the drain hole to facilitate the drainage of the inside of the volute body 11. The impeller 2 is installed in the cavity of the volute body 11. The impeller 2 is a cantilever closed backward-inclined centrifugal impeller, including an inner plate 21, and a center hole is provided at the center of the inner plate 21. The driving shaft of the motor 4 passes through the center hole of the inner plate 21 and is fixedly connected to the inner plate 21 through the impeller fixing sleeve 16 to facilitate the installation and disassembly and maintenance of the impeller 2. The front end of the inner plate 21 is provided with an outer ring 22, and the inner plate 21 and the outer ring 22 are connected by a plurality of arc blades 23, and an air duct is formed between adjacent arc blades 23. The motor 4 is installed on the rear side of the volute 1 and connected to the impeller 2.

[0026] The volute 1 and the impeller 2 are both integrally injection molded with a self-made corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material, and the corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material is made in the following manner:

[0027] (1) A spherical stirred bed semi-batch reactor is used for polymerization to obtain a linear low-density polyethylene material matrix that meets the requirements. The spherical stirred bed semi-batch reactor is controlled by a mass flow meter and a temperature control unit. The temperature is controlled by a cooling coil and an electric heater. The tolerance of the polymerization temperature is set to ±0.2°C. Since the spherical stirred bed semi-batch reactor is operated intermittently in batch mode, all substances involved in the reaction, including catalysts, hydrogen and comonomers, are added to the reactor at one time except ethylene, and ethylene is fed continuously to maintain a constant pressure.

[0028] In actual work, first use 115°C nitrogen to purge the spherical stirred bed semi-batch reactor for 1 hour to remove air, moisture and impurities in the reactor, then add hexane solvent to the reactor at room temperature and stir for 5 minutes, then inject Ziegler-Natta catalyst slurry into the reactor and stir for 10 minutes to mix the catalyst slurry with the hexane solvent, then inject 1-butene comonomer and hydrogen required for the reaction into the reactor, and then continuously introduce 0.5Mpa ethylene gas into the reactor, heat the reactor to 85°C, and polymerize for 1h. After the polymerization is completed, stop the flow of ethylene to the reactor, quickly exhaust the air to reduce the reactor pressure, and remove unreacted substances. After waiting for the temperature in the reactor to drop to room temperature, take out the obtained polymer, precipitate it in an ethanol solution, filter it, and vacuum dry it to obtain a linear low-density polyethylene material matrix.

[0029] (2) Add solid microfibrillated cellulose and deionized water in a mass ratio of 1:50 into a blender and stir evenly to prepare a microfibrillated cellulose suspension with a mass fraction of 2%, add the 2% microfibrillated cellulose suspension into a sorbitan oleate solution, stir and react at 50°C for 20 minutes, then pour the obtained emulsion into a storage tank, dry it in a forced air drying oven at 50°C for 2-3 days, and obtain microfibrillated cellulose treated with sorbitan oleate. The purpose of using sorbitan oleate to treat microfibrillated cellulose is to enhance the activity of microfibrillated cellulose, so that microfibrillated cellulose can be better compounded with the subsequent linear low-density polyethylene material matrix, thereby obtaining a microfibrillated cellulose / linear low-density polyethylene composite material with higher hardness and stronger corrosion resistance.

[0030] (3) Add the microfibrillated cellulose treated with sorbitan oleate obtained in step (2) into xylene, stir at 90°C for 30 minutes to obtain a microfibrillated cellulose / xylene suspension, then add the linear low-density polyethylene material matrix obtained in step (1) into the microfibrillated cellulose / xylene suspension, stir at 120°C for 30 minutes and filter, then use 95% ethanol solution to wash the filtered microfibrillated cellulose / linear low-density polyethylene mixture for multiple times, and finally dry the washed microfibrillated cellulose / linear low-density polyethylene at 85°C to obtain corrosion-resistant, high-hardness and recyclable microfibrillated cellulose / linear low-density polyethylene.

[0031] (4) The corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene prepared in step (3) is melted and injected into an injection mold of a volute and an impeller to prepare a corrosion-resistant, high-hardness, recyclable volute and an impeller.

[0032] Comparative Example 1

[0033] Without treating the microfibrillated cellulose with sorbitan oleate, the microfibrillated cellulose is directly added into xylene and compounded with a linear low-density polyethylene matrix material to obtain a microfibrillated cellulose / linear low-density polyethylene composite material that has not been treated with sorbitan oleate.

[0034] Comparative Example 2

[0035] Without compounding the microfibrillated cellulose with the linear low-density polyethylene, the performance test is directly performed on the linear low-density polyethylene material matrix obtained in step (1).

[0036] The corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene obtained by the present invention has a UV grade of 8 and excellent flowability, and is suitable for injection molding of products with complex structures and high requirements for hardness and corrosion resistance. The material properties of Example 1 and Comparative Examples 1-2 were tested, and the properties are as follows:

[0037] Table 1 Material properties of Example 1 and Comparative Examples 1-2

[0038]

[0039]

[0040] It can be seen from the data in Example 1 that the corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene material prepared by the present invention has the characteristics of corrosion resistance and high hardness, with a corrosion reduction rate of 10% and a Shore hardness of 65, which well meets the high hardness and corrosion resistance performance requirements during the manufacture and use of the fan volute and impeller. In addition, the corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene material prepared by the present invention has the characteristics of melt recyclability, so the volute and impeller are made of the corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene, which is recyclable as a whole and environmentally friendly.

[0041] By comparing the data of Example 1 and Comparative Example 1, it can be seen that if the microfibrillated cellulose is not treated with sorbitan oleate, the microfibrillated cellulose is directly added to xylene and composited with a linear low-density polyethylene material matrix, the composite efficiency of the microfibrillated cellulose and the linear low-density polyethylene material matrix is ​​very poor, and the hardness and corrosion resistance of the finally obtained microfibrillated cellulose / linear low-density polyethylene composite material that has not been treated with sorbitan oleate are not greatly improved.

[0042] By comparing the data of Example 1 and Comparative Example 2, it can be seen that after the microfibrillated cellulose is treated with sorbitan oleate and compounded with the linear low-density polyethylene material matrix, the microfibrillated cellulose / linear low-density polyethylene composite material obtained has been greatly improved in strength, hardness and corrosion resistance. Moreover, as a recyclable and environmentally friendly material, the microfibrillated cellulose / linear low-density polyethylene composite material can be recycled and is environmentally friendly.

[0043] This overall recyclable high-efficiency energy-saving and anti-corrosion fan has a simple structure, ingenious design, small size, light weight, low production, maintenance, transportation and installation costs, and good anti-corrosion effect. The volute and impeller are made of corrosion-resistant, high-hardness, recyclable linear low-density polyethylene. It is overall recyclable and environmentally friendly.

[0044] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. An integrally recyclable high-efficiency energy-saving anti-corrosion fan, comprising: A frame, a volute is mounted on the frame, an impeller is mounted in the volute, a motor is mounted on the rear side of the volute and connected to the impeller, characterized in that the volute and the impeller are integrally injection molded with a corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material, and the corrosion-resistant, high-hardness, recyclable linear low-density polyethylene material is made by the following method: S1, using 110-120 ℃ nitrogen to purge the reactor for 1-2 hours to remove the air, moisture and impurities in the reactor, then at room temperature, add hexane solvent to the reactor, and stir for 5-10 minutes, then inject the catalyst slurry into the reactor, and stir for 5-15 minutes to mix the catalyst slurry with the hexane solvent, then inject 1-butene comonomer and hydrogen required for the reaction into the reactor, and then continuously pass 0.5Mpa of ethylene gas into the reactor, heat the reactor to 80-90 ℃, until polymerization for 1h, after the polymerization is completed, stop the flow of ethylene to the reactor, quickly exhaust to reduce the reactor pressure, and remove unreacted substances, wait for the temperature in the reactor to drop to room temperature, take out the obtained polymer, precipitate in an ethanol solution, filter, and vacuum dry to obtain a linear low-density polyethylene material matrix; S2, adding solid microfibrillated cellulose and deionized water in a mass ratio of 1:50 into a blender, and stirring evenly to prepare a microfibrillated cellulose suspension with a mass fraction of 2%, adding the 2% microfibrillated cellulose suspension into a sorbitan oleate solution, and stirring and reacting at 50° C. for 20 minutes, and then pouring the obtained emulsion into a storage tank, and drying it in a forced air drying oven at 50° C. for 2-3 days to obtain microfibrillated cellulose treated with sorbitan oleate; S3, adding the microfibrillated cellulose treated with sorbitan oleate obtained in step S2 into xylene, stirring at 90°C for 30 minutes to obtain a microfibrillated cellulose / xylene suspension, then adding the linear low-density polyethylene material matrix obtained in step S1 into the microfibrillated cellulose / xylene suspension, stirring at 120°C for 30 minutes and filtering, then using 95% ethanol solution to wash the filtered microfibrillated cellulose / linear low-density polyethylene mixture for multiple times, and finally drying the washed microfibrillated cellulose / linear low-density polyethylene at 85°C to obtain corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene; S4. Melting the corrosion-resistant, high-hardness, recyclable microfibrillated cellulose / linear low-density polyethylene prepared in step S3 and injecting it into the injection mold of the volute and impeller to prepare the corrosion-resistant, high-hardness, recyclable volute and impeller.

2. The integrally recyclable high-efficiency energy-saving anti-corrosion fan according to claim 1, characterized in that: The reactor used in step S1 is a spherical stirred bed semi-batch reactor, which includes a mass flow meter and a temperature control unit. The temperature is controlled by a cooling coil and an electric heater, and the tolerance of the polymerization temperature is set to ±0.2°C.

3. The integrally recyclable high-efficiency energy-saving anti-corrosion fan according to claim 1 is characterized in that: The catalyst used in step S1 is a Ziegler-Natta catalyst.

4. The integrally recyclable high-efficiency energy-saving anti-corrosion fan according to claim 1, characterized in that: The impeller is a cantilevered closed backward-inclined centrifugal impeller, including an inner plate, a center hole is arranged at the center of the inner plate, a driving shaft of the motor passes through the center hole of the inner plate and is fixedly connected to the inner plate through an impeller fixing sleeve, an outer ring is arranged at the front end of the inner plate, the inner plate and the outer ring are connected by a plurality of arc-shaped blades, and an air duct is formed between adjacent arc-shaped blades.

5. The integrally recyclable high-efficiency energy-saving anti-corrosion fan according to claim 1, characterized in that: The volute includes a volute body, a conical air inlet pipe is installed at the air inlet of the volute body, the air outlet of the conical air inlet pipe is arranged opposite to the impeller, an air outlet flange is arranged at the air outlet of the volute body, a cleaning hole is arranged obliquely above the volute body, a cleaning hole cover is closed on the cleaning hole, a drainage hole is arranged obliquely below the volute body, a drainage hole cover is closed on the drainage hole, and the impeller is installed in the cavity of the volute body.

6. The integrally recyclable high-efficiency energy-saving anti-corrosion fan according to claim 1, characterized in that: The frame includes a base, a front end of the base is provided with an upwardly protruding volute front bracket, a rear end of the base is provided with an upwardly protruding motor mounting seat, the motor is horizontally mounted on the motor mounting seat, a front end of the motor mounting seat is provided with a volute rear fixing bracket, the front end of the volute is fixed on the volute front bracket, and the rear end of the volute is fixed on the volute rear bracket.

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