Oil-saving oil bath type air filter equipment without secondary pollution

Abstract

The utility model discloses oil-saving oil bath type air filter equipment without secondary pollution, which comprises a flow collecting cover, an axial flow fan, a flow collecting pipe, an upper cover, a barrel, a drainage pipe, an outer screen, a separation cover, an inner screen, a filter element, an exhaust pipe and a wind shield, the upper end of the flow collecting pipe is connected with the flow collecting cover, the lower end of the flow collecting pipe penetrates through the upper cover, the filter element, the drainage pipe and an immersed oil surface, and the drainage pipe is connected with the bottom of the barrel; the separation cover is arranged outside the drainage pipe and is sleeved with the collecting pipe; the small end of the inner screen is sleeved with the collecting pipe, and the large end is sleeved with the separation cover; the outer screen is connected with the upper side of the separation cover and the lower side of the barrel; the large end of the baffle plate is connected with the cylinder body, and the small end of the baffle plate is suspended and embedded between the filter element and the upper cover. The oil bath type air filter is high in filtering efficiency and good in anti-blocking performance, air can be effectively purified, fire safety accidents caused by dust particles are avoided, field workers are prevented from inhaling the dust particles, respiratory tract injuries are avoided, and secondary pollution caused by oil mist leakage of oil bath type air filter equipment can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of air dust removal, and in particular relates to an oil bath type air filter device. Background Art

[0002] Currently, in flour and cement production sites, where airborne dust concentrations are high, typical dust removal systems utilize either wire mesh secondary dust removal or paper or fiber filtration. Wire mesh secondary dust removal has a small collection area and can only filter larger dust particles, causing fine dust to re-enter the air. Paper and fiber filtration, on the other hand, can easily clog due to dust accumulation. Flour and cement particles, in particular, clump easily, making them difficult to clean and requiring frequent downtime to replace filter media, increasing worker workload.

[0003] To address the shortcomings of dry-type dust removal systems, oil-bath air filters have begun to be used in related environments. These use an oil-bathed air filter. These filters typically draw air tangentially into a circular cylinder through an external fan. The cylinder's drainage mechanism causes the air to swirl at high speed, separating dust particles from the airflow due to centrifugal force and flinging them toward the cylinder walls. The air then passes over the oil surface, creating fluctuations and droplets, forming an oil mist. This mist is carried by the airflow and swirled toward the cylinder walls, where it adheres to the inner cylinder, forming an oil film. Dust particles in the airflow are captured by the oil film. The oil film then flows back along the cylinder walls, forming a drooping curtain of oil, which washes dust trapped by the oil film onto the cylinder bottom and creates a new oil film. As the air passes through the oil bath, some dust particles are captured. The separated air then passes through the filter element, where any remaining dust particles and oil droplets are removed, achieving air purification. The dust particles remaining in the separated air flow have fully contacted with the oil mist to form an oil film, which has lost its adhesiveness, thus avoiding adhesion to the filter element and preventing it from agglomerating.

[0004] While an oil bath can separate some dust particles, a small amount of droplets in the oil mist can prevent dust particles from sticking to the filter element. However, excessive droplets accumulating on the filter element can cause clogging. Therefore, oil bath air filters typically use a steel mesh filter structure, leveraging the reverse osmosis function of the steel mesh to reversely ooze out excess oil and prevent clogging. While the steel mesh has reverse osmosis, its filtration accuracy is poor. During the filtration process, droplets must be stirred up to form oil mist. Too little oil mist results in a poor oil bath and reduced filtration efficiency. Excessive oil mist exceeds the filtration capacity of the steel mesh, increasing oil mist leakage, fuel consumption, and even secondary pollution. It's difficult to strike a balance between filtration efficiency and fuel consumption. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a more efficient, environmentally friendly, fuel-saving, oil-bath air filter device with no secondary pollution.

[0006] The technical solution of the utility model is: a fuel-saving oil bath air filter device with no secondary pollution, comprising: a collecting cover, an axial flow fan, a collecting pipe, an upper cover, a cylinder, a drainage pipe, an outer screen, a separation cover, an inner screen, a filter element, an exhaust pipe, and a wind shield. The axial flow fan is sleeved on the inner side of the large end of the collecting cover, the upper end of the collecting pipe is connected to the small end of the collecting cover, the toothed opening at the lower end passes through the middle hole of the upper cover, the middle hole of the filter element, and the middle hole of the drainage pipe, the lower side of the opening of the collecting pipe is immersed in the oil surface, and the lower end of the drainage pipe is connected to the bottom of the cylinder in a aligned manner; The separation cover is located on the outside of the drainage pipe, with the small hole sleeved on the middle section of the collecting pipe and the large hole facing downward; the inner screen is located on the inside of the separation cover, with the small end sleeved on the collecting pipe and the large end sleeved on the separation cover; the small end of the outer screen is connected to the upper side of the separation cover, and the large end is connected to the lower side of the cylinder; the filter element is located above the separation cover and below the upper cover, and the side is movably connected to the cylinder wall; the upper cover is sleeved on the top of the cylinder, and the exhaust pipe penetrates into the cylinder from the upper side of the filter element, close to the wind shield, the large end of the baffle is connected to the cylinder, and the small end is suspended in the air, and is embedded between the filter element and the upper cover.

[0007] The collecting cover is a large and small head funnel structure.

[0008] The collecting pipe is a straight pipe, and the opening at the lower end is an annular sharp tooth opening.

[0009] The lower end of the drainage pipe is cylindrical and centrally connected to the bottom of the cylinder, with oil grooves on both sides; the upper end is a threaded pipe, and the inner cavity and the collecting pipe form a triangular cross-section spiral groove.

[0010] The outer screen and the inner screen are conical single-layer steel wire meshes with large surface area, good air permeability, small wind resistance and good reverse osmosis performance.

[0011] The lower end of the separation cover is cylindrical, and the upper end is conical; a separation cavity is formed between the separation cover and the drainage pipe, a buffer cavity is formed between the separation cover and the cylinder, and an oil-trapping cavity is formed between the separation cover and the inner screen.

[0012] The filter element is a steel wire filter element with a hollow conical structure, with the conical end facing upwards.

[0013] The wind shield is in the shape of a right-angled trapezoid, and an unloading groove is formed between the wind shield and the drainage pipe.

[0014] When the utility model is working, the axial flow fan is started to generate cyclone suction, and the cyclone mixed with dust particles is collected by the collecting cover and then enters the inner cavity of the drainage pipe through the collecting pipe. The toothed opening at the lower end is located at the intersection of gas and liquid. The cyclone generates laminar flow between the teeth, which mix with each other, stir the oil surface and stir up foam to form oil mist. The oil mist spirals up along the triangular cross-section spiral groove between the collecting pipe and the drainage pipe to form a cyclone. The oil mist is entrained by the air flow and rotates and is thrown toward the inner wall of the drainage pipe, adheres to the inner wall of the drainage pipe to form an oil film, and the dust particles in the air flow are captured by the oil film, which flows back along the wall to form a drooping oil curtain, washing the dust captured by the oil film on the inner wall of the drainage pipe to the bottom, and generating a new oil film, thereby realizing centrifugal separation and oil-bathing the air. Due to the collection of the triangular cross-section spiral groove, the centrifugal separation effect is more significant. After the oil mist is depressurized at the orifice at the upper end of the drainage tube, it is buffered by the inner screen and then sprayed onto the separation hood, forming a downward oil curtain for secondary centrifugal separation. The inner screen blocks the oil mist from the central orifice of the drainage tube, buffering it. This mitigates the impact of the oil mist on the inner wall of the separation hood, creating secondary splashing. It also effectively separates some droplets while buffering the oil mist. It also blocks and separates secondary droplets, and its conical structure directs the reverse osmosis oil toward the inner wall of the separation hood, effectively improving filtration efficiency. As the airflow within the separation hood is discharged downward, the airflow along the outer side of the drainage tube rotates downward, compensating for the centrifugal force lost by the oil mist in the trapped oil chamber, allowing centrifugal separation to continue. After two centrifugal separations, the airflow in the buffer chamber has slowed, allowing the outer screen to continue filtering any residual oil in the mist and, through its conical structure, direct the reverse osmosis oil toward the inner wall of the cylinder. The oil mist that passes through the outer screen is finely filtered by the filter element before entering the upper cavity of the cylinder and being discharged through the exhaust pipe. The filter element and outer screen utilize their conical structures to direct the reverse osmosis oil toward the inner wall of the cylinder. Due to the blocking effect of the windshield, a pressure difference is formed at both ends of the windshield during the exhaust process. The air in the circular cavity rotates again, and the unloading groove C reserves an annular path for the airflow, forming a cyclone again, implementing terminal centrifugal filtration, further separating the residue passing through the filter element, and effectively reducing the leakage of residual droplets and residual dust particles.

[0015] This utility model replaces engine oil with rapeseed oil as the filter medium and optimizes and improves the relevant structure to launch a fuel-saving oil bath air filter device with no secondary pollution. Compared with the existing technology, this utility model has the following advantages:

[0016] 1. The utility model has a good anti-blocking effect. Before the oil mist enters the filter element, it is first centrifuged and buffered, and then coarsely filtered by the inner and outer screens. The droplets and dust particles are greatly reduced. The filter element, inner and outer screens can use their conical structures to drain the reverse osmosis oil to the inner wall of the cylinder, reducing oil collection and preventing blockage. It avoids excessive oil accumulation in the filter element due to blockage, causing oil mist leakage and causing secondary pollution.

[0017] 2. The utility model has high oil-gas separation efficiency. The oil mist is collected along the triangular cross-section spiral groove between the collecting pipe and the drainage pipe. After one centrifugal separation, it is buffered and separated in the oil-trapped cavity of the separation cover. When the separation cover exhausts downward, the airflow flowing along the outside of the drainage pipe rotates downward to compensate for the centrifugal force loss caused by the oil mist in the oil-trapped cavity and continue centrifugal separation. During the centrifugal separation process, the inner and outer screens fully coarsely filter the oil mist. The residue after fine filtration by the filter element is further subjected to terminal centrifugal filtration to purify the oil mist before being discharged to avoid secondary pollution caused by residual oil mist.

[0018] 3. The utility model has high oil mist generation efficiency. The toothed opening at the lower end of the collecting pipe is located at the intersection of gas and liquid in the inner cavity of the drainage pipe. The cyclone from the axial flow fan generates laminar flow between the teeth, which mix with each other, stir the oil surface and stir up foam to form oil mist.

[0019] 4. The utility model has low fuel consumption, high oil mist generation efficiency, and good oil-gas separation effect, which can effectively reduce fuel consumption, increase service life, and reduce the number of refueling times.

[0020] 5. The utility model has high filtration efficiency and good dust removal effect. It can effectively reduce the dust concentration in the air of the production site, purify the air, and avoid fire safety accidents caused by dust particles; reduce the dust particles inhaled by on-site workers, avoid respiratory damage, and protect human health.

[0021] 6. The filter medium of the utility model is rapeseed oil, which is non-toxic and non-irritating, and can avoid oil mist leakage caused by damage to the oil bath air filter equipment, resulting in secondary pollution.

[0022] 7. The utility model has a wide range of applications and is not only suitable for flour production and cement production sites, but also for other workplaces with high dust concentration in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Structural diagram of this utility model. DETAILED DESCRIPTION

[0024] like Figure 1As shown, a fuel-saving oil bath air filter device with no secondary pollution includes: a collecting cover 1, an axial flow fan 2, a collecting pipe 3, an upper cover 4, a cylinder 5, a drainage pipe 6, an outer screen 7, a separation cover 8, an inner screen 9, a filter element 10, an exhaust pipe 11, and a wind shield 12. The axial flow fan 2 is sleeved on the inner side of the large end of the collecting cover 1, the upper end of the collecting pipe 3 is connected to the small end of the collecting cover 1, and the toothed opening P at the lower end passes through the middle hole of the upper cover 4, the middle hole of the filter element 10, and the middle hole of the drainage pipe 6. The lower side of the opening of the collecting pipe 3 is immersed in the oil surface T, and the lower end of the drainage pipe 6 is connected to the bottom of the cylinder 5 in a centering manner; the separation cover 8 is at the bottom. On the outside of the drainage pipe 6, the small hole is sleeved on the middle section of the collecting pipe 3, and the large hole faces downward; the inner screen 9 is located on the inside of the separation cover 8, the small end is sleeved on the collecting pipe 3, and the large end is sleeved on the separation cover 8; the small end of the outer screen 7 is connected to the upper side of the separation cover 8, and the large end is connected to the lower side of the cylinder 5; the filter element 10 is located above the separation cover 8 and below the upper cover 4, and the side is movably connected to the wall of the cylinder 5; the upper cover 4 is sleeved on the top of the cylinder 5, and the exhaust pipe 11 penetrates the cylinder 5 from the upper side of the filter element 10, close to the wind shield 12, the large end of the baffle 12 is connected to the cylinder 5, and the small end is suspended, and is embedded between the filter element 10 and the upper cover 4.

[0025] The collecting cover 1 is a large and small head funnel structure.

[0026] The collecting pipe 3 is a straight pipe, and the opening at the lower end is an annular sharp tooth opening.

[0027] The lower end of the drainage pipe 6 is cylindrical and centrally connected to the bottom of the cylinder 5, with oil grooves Q on both sides; the upper end is a threaded pipe, and the inner cavity and the collecting pipe 3 form a triangular cross-section spiral groove.

[0028] The outer screen 7 and the inner screen 9 are conical single-layer steel wire meshes with large surface area, good air permeability, low wind resistance and good reverse osmosis performance.

[0029] The lower end of the separation cover 8 is cylindrical and the upper end is conical; a separation chamber is formed between the separation cover 8 and the drainage pipe 6, a buffer chamber is formed between the separation cover 8 and the cylinder 5, and an oil-trapping chamber is formed between the separation cover 8 and the inner screen 9.

[0030] The filter element 10 is a steel wire filter element with a hollow conical structure, with the conical end facing upward.

[0031] The wind shield 12 is in the shape of a right-angled trapezoid, and an unloading groove C is formed between the wind shield 12 and the drainage pipe 6 .

Claims

1. A fuel-saving oil bath air filter device with no secondary pollution, comprising: The exhaust pipe penetrates the cylinder from the upper side of the filter element, closes to the windshield, the large end of the baffle is connected to the cylinder, and the small end is suspended in the air, and is embedded between the filter element and the upper cover.

2. The fuel-saving oil bath air filter equipment without secondary pollution according to claim 1 is characterized in that: The collecting pipe is a straight pipe, and the opening at the lower end is an annular sharp tooth opening.

3. A fuel-saving oil bath air filter device without secondary pollution according to claim 1 or 2, characterized in that: The lower end of the drainage pipe is cylindrical and centrally connected to the bottom of the cylinder. Oil grooves are provided on both sides and the upper end is a threaded pipe.

4. The fuel-saving oil bath air filter equipment without secondary pollution according to claim 3 is characterized in that: The outer screen and the inner screen are conical single-layer steel wire meshes.

5. The fuel-saving oil bath air filter equipment without secondary pollution according to claim 4 is characterized in that: The lower end of the separation cover is a cylinder, and the upper end is a cone.

6. The fuel-saving oil bath air filter equipment without secondary pollution according to claim 5 is characterized in that: The filter element is a steel wire filter element with a hollow conical structure, with the conical end facing upwards.

7. The fuel-saving oil bath air filter equipment without secondary pollution according to claim 6, characterized in that: The wind shield is in the shape of a right-angled trapezoid, and an unloading groove is formed between the wind shield and the drainage pipe.

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