Oil-gas separator and oil-gas separation method for oil injection compressor

Abstract

The oil-gas separator of the oil-injected compressor comprises a separator shell, an oil-gas mixture inlet, an oil-gas mixture outlet and an oil outlet are formed in the separator shell, a plurality of porous plates are arranged in the separator shell, the adjacent two layers of the porous plates are staggered in the opening position, so that a plurality of vortexes are formed when the oil-gas mixture passes through the adjacent two layers of the porous plates, the oil-gas mixture inlet is arranged on the side wall of the separator shell above the porous plates, the oil-gas mixture outlet is arranged on the top surface of the separator shell, the inner cavity of the separator shell below the porous plates is communicated with the oil-gas mixture outlet through an exhaust pipe, and the oil outlet is arranged on the bottom of the separator shell. When the oil-gas mixture passes through the oil-gas separator, small-diameter oil droplets can collide and aggregate to form large-diameter oil droplets in the oil-gas separator, the oil separation efficiency is improved, the oil-gas separator will not be blocked during use, is easy to clean, does not need to be replaced, and the cost is reduced and energy is saved.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to an oil-gas separator for an oil-injected compressor and an oil-gas separation method. Background Technology

[0002] Compressors consistently experience issues such as noise, leakage, and high exhaust temperatures during operation. Injecting lubricating oil into the compressor not only reduces noise but also provides a degree of sealing, minimizing leakage. Simultaneously, the injected lubricating oil mixes with the compressed gas, cooling it and thus lowering the exhaust temperature and the overall compressor temperature. Before entering downstream piping systems, the oil-gas mixture discharged from the compressor outlet must undergo oil-gas separation. This prevents corrosion and damage to downstream system components and minimizes lubricating oil waste.

[0003] Currently, oil-injected compressor systems typically use cyclone-type oil separators as pre-separators to remove large-diameter oil droplets. Subsequently, oil filter elements are used to separate small- and medium-diameter droplets. The oil filter element consists of a condensation layer and an interception layer. The main filter material in the condensation layer is micron-sized glass fiber. After diffusion and aggregation by the filter material, small oil droplets quickly coalesce into larger droplets, which are then intercepted by the interception layer and settle at the bottom of the filter element under gravity. This lubricating oil continuously returns to the lubrication system through the return oil inlet at the bottom of the filter element.

[0004] However, since the final processing result of the filter material is filtration, some impurities carried in the lubricating oil will gradually accumulate on the filter material, causing blockage inside the filter element and deteriorating the separation performance of the oil-gas separator filter element. At the same time, the oil separator filter element is difficult to clean and can only be replaced periodically, resulting in a short service life. The replaced oil separator filter element cannot be recycled, and the filter element material causes serious environmental pollution. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art by providing an oil-gas separator and oil-gas separation method for an oil-injection compressor, which not only improves the oil-gas separation efficiency but also prevents clogging, is easy to clean, and does not require replacement.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An oil-gas separator for an oil-injected compressor includes a separator housing with an oil-gas mixture inlet, an oil-gas mixture outlet, and an oil outlet. The separator housing contains multiple layers of stacked perforated plates with staggered openings between adjacent layers, creating multiple vortices as the oil-gas mixture passes between adjacent plates. The oil-gas mixture inlet is located on the side wall of the separator housing above the perforated plates, the oil-gas mixture outlet is located on the top surface of the separator housing, and an exhaust pipe connects the inner cavity of the separator housing below the perforated plates to the oil-gas mixture outlet. The oil outlet is located at the bottom of the separator housing.

[0008] As a preferred embodiment, the multi-layered perforated plate is composed of a first perforated plate and a second perforated plate that are stacked alternately in sequence; the opening positions on the first perforated plate and the second perforated plate are distributed in multiple sets of equilateral triangles, and the center of the hole in the first perforated plate and the second perforated plate is the center of the equilateral triangle to each other.

[0009] As a preferred embodiment, the perforated plate has a pore diameter of 1 mm to 2 mm.

[0010] As a preferred embodiment, the hole spacing of the perforated plate is 3 to 5 times the hole diameter.

[0011] As a preferred embodiment, the spacing between adjacent first porous plates and second porous plates is 1 to 3 times the aperture.

[0012] As a preferred embodiment, the spacing between adjacent first and second perforated plates is equal.

[0013] As a preferred embodiment, the perforated plate is made of stainless steel.

[0014] As a preferred embodiment, the oil-gas mixture outlet is located at the center of the top surface of the separator housing, and the exhaust pipe passes through all the perforated plates along the axis.

[0015] As a preferred embodiment, the separator housing is cylindrical.

[0016] An oil-gas separation method based on the aforementioned oil-gas separator in an oil-injection compressor includes the following steps:

[0017] The oil-gas mixture enters the separator shell through the oil-gas mixture inlet and moves downward through multiple layers of perforated plates. As the oil-gas mixture moves downward through each layer of perforated plates, some oil droplets are directly separated and fall to the bottom of the separator shell by gravity. Other oil droplets collide and coalesce in the space between two adjacent perforated plates due to multiple vortices formed by the flow field, increasing the diameter of the oil droplets before they fall to the bottom of the separator shell by gravity. The gas obtained from the oil-gas separation is discharged from the oil-gas mixture outlet through the exhaust pipe, and the oil obtained from the oil-gas separation is discharged through the oil outlet.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] Existing oil separator filters, during use, accumulate impurities from the lubricating oil over time, causing internal blockage. This leads to increased pressure loss and decreased oil-gas separation efficiency, and the replaced filters pollute the environment. In contrast, the oil-gas separator for injection compressors proposed in this invention utilizes the diffusion and aggregation principles of the oil separator filter media. When the oil-gas mixture passes through this separator, the flow field becomes extremely turbulent, creating numerous vortices between adjacent perforated plates. Oil droplets move between these vortices, increasing the collision probability of small droplets. These small droplets collide and aggregate inside the separator, forming larger droplets that replace the coagulation layer of the oil separator filter. Some droplets fall to the bottom due to gravity, while others are more easily separated in subsequent oil-gas separation processes, improving separation efficiency. Furthermore, the oil separator does not clog during use, is easy to clean, requires no replacement, and reduces costs and saves energy.

[0020] Furthermore, the porous plate of the present invention is composed of a first porous plate and a second porous plate. The opening positions on the first porous plate and the second porous plate are distributed in multiple sets of equilateral triangles, and the center of the holes in the first porous plate and the second porous plate are the centers of the equilateral triangles of each other. This is conducive to the formation of vortices when the oil-gas mixture passes between two adjacent porous plates, which promotes the oil-gas separation effect, facilitates the aggregation of small-diameter oil droplets into large-diameter oil droplets, facilitates the subsequent oil-gas separation process, and improves the oil-gas separation efficiency. Attached Figure Description

[0021] Figure 1 A schematic diagram of the external shape of the oil-gas separator of the fuel-injected compressor of the present invention;

[0022] Figure 2 A cross-sectional structural schematic diagram of the oil-gas separator of the oil-injected compressor of the present invention;

[0023] Figure 3 A schematic diagram of the opening positions of the first perforated plate of the present invention;

[0024] Figure 4 A schematic diagram of the opening positions of the second perforated plate of the present invention;

[0025] Figure 5 A schematic diagram of the opening positions after the adjacent first porous plate and second porous plate of the present invention are stacked;

[0026] In the attached diagram: 1-Separator housing; 2-Oil-gas mixture inlet; 3-Oil-gas mixture outlet; 4-Oil outlet; 5-Exhaust pipe; 6a-First perforated plate; 6b-Second perforated plate. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] See Figure 1 and Figure 2 This invention proposes an oil-gas separator for an oil-injection compressor, characterized by its ability to achieve the coagulation of fine oil droplets, which can replace the coagulation layer of existing oil-gas separator filter elements and reduce the frequency of filter element replacement.

[0029] Specifically, the oil-gas separator of the fuel-injected compressor in this embodiment of the invention includes a separator housing 1. The separator housing 1 has an oil-gas mixture inlet 2, an oil-gas mixture outlet 3, and an oil outlet 4. The interior of the separator housing 1 is provided with multiple layers of stacked perforated plates. Furthermore, the opening positions of adjacent layers of perforated plates are staggered, allowing the oil-gas mixture to form multiple vortices when passing between adjacent perforated plates. The oil-gas mixture inlet 2 is located on the side wall of the separator housing 1 above the perforated plates, and the oil-gas mixture outlet 3 is located on the top surface of the separator housing 1. An exhaust pipe 5 connects the inner cavity of the separator housing 1 below the perforated plates to the oil-gas mixture outlet 3. In one possible embodiment, the oil-gas mixture outlet 3 is located at the center of the top surface of the separator housing 1, and the exhaust pipe 5 passes through all the perforated plates along its axis. The oil outlet 4 is located at the bottom of the separator housing 1.

[0030] See Figure 3 and Figure 4 In one possible implementation, the multi-layered perforated plate of the present invention is composed of a first perforated plate 6a and a second perforated plate 6b stacked alternately in sequence; the openings on the first perforated plate 6a and the second perforated plate 6b are arranged in multiple sets of equilateral triangles, and the centers of the holes on the first perforated plate 6a and the second perforated plate 6b are the centers of the equilateral triangles of each other. That is, the projection (dashed circle) of the center of the hole on the second perforated plate 6b onto the first perforated plate 6a is located at the center of the equilateral triangle formed by connecting three adjacent center holes (solid circle) on the first perforated plate 6a. Figure 5 As shown.

[0031] Furthermore, the perforated plate has a pore size of 1mm to 2mm, and the pore spacing is 3 to 5 times the pore size. Two types of perforated plates are arranged alternately, with a very close arrangement. The spacing between adjacent first perforated plates 6a and second perforated plates 6b is 1 to 3 times the pore size, and the spacing between adjacent first perforated plates 6a and second perforated plates 6b is equal. When the fluid passes through the perforated plate, many vortices are formed, which increases the collision probability of oil droplets. The perforated plate is made of stainless steel to prevent corrosion.

[0032] Another embodiment of the present invention, based on the oil-gas separator of the fuel injection compressor, includes the following steps:

[0033] The oil-gas mixture from the pre-separator enters the separator shell 1 through the oil-gas mixture inlet 2. At this point, the oil droplet diameter is relatively small. The gas moves downwards through multiple layers of perforated plates. As the gas moves downwards through each layer of perforated plates, some oil droplets are directly separated and fall to the bottom of the separator shell 1 by gravity. Other oil droplets collide and coalesce in the small spaces between the perforated plates under the influence of numerous vortices formed by the flow field, gradually growing into large-diameter oil droplets. Finally, the gas flows out through the exhaust pipe 5 and exits from the oil-gas mixture outlet 3. Every so often, a significant amount of oil accumulates at the bottom of the separator shell 1 and is discharged through the oil outlet 4. This oil-gas separator, through its multiple layers of perforated plates, not only separates a portion of the oil but, more importantly, coalesces small-diameter oil droplets into larger-diameter droplets, thus facilitating subsequent separation processes and improving oil separation efficiency. Furthermore, this oil-gas separator does not clog during use and is easy to clean.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the technical solution of the present invention in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. An oil-gas separator for an oil-injected compressor, characterized in that, The separator includes a separator housing (1), which has an oil-gas mixture inlet (2), an oil-gas mixture outlet (3), and an oil outlet (4). The separator housing (1) is equipped with multiple layers of perforated plates. The opening positions of the perforated plates of adjacent layers are staggered, so that the oil-gas mixture forms multiple vortices when passing between adjacent perforated plates. The oil-gas mixture inlet (2) is located on the side wall of the separator housing (1) above the perforated plates. The oil-gas mixture outlet (3) is located on the top surface of the separator housing (1). The inner cavity of the separator housing (1) below the perforated plates is connected to the oil-gas mixture outlet (3) through the exhaust pipe (5). The oil outlet (4) is located at the bottom of the separator housing (1). The multi-layered perforated plate is composed of a first perforated plate (6a) and a second perforated plate (6b) that are stacked alternately in sequence; The openings on the first porous plate (6a) and the second porous plate (6b) are arranged in multiple sets of equilateral triangles, and the center of the holes in the first porous plate (6a) and the second porous plate (6b) are the centers of the equilateral triangles.

2. The oil-gas separator for an oil-injected compressor according to claim 1, characterized in that, The perforated plate has a pore size of 1mm to 2mm.

3. The oil-gas separator for an oil-injected compressor according to claim 2, characterized in that, The hole spacing of the perforated plate is 3 to 5 times the hole diameter.

4. The oil-gas separator for an oil-injected compressor according to claim 1, characterized in that, The distance between adjacent first porous plates (6a) and second porous plates (6b) is 1 to 3 times the aperture.

5. The oil-gas separator for an oil-injected compressor according to claim 4, characterized in that, The spacing between adjacent first porous plates (6a) and second porous plates (6b) is equal.

6. The oil-gas separator for an oil-injected compressor according to claim 1, characterized in that, The perforated plate is made of stainless steel.

7. The oil-gas separator for an oil-injected compressor according to claim 1, characterized in that, The oil-gas mixture outlet (3) is located at the center of the top surface of the separator housing (1), and the exhaust pipe (5) passes through all the perforated plates along the axis.

8. The oil-gas separator for an oil-injected compressor according to claim 1, characterized in that, The separator housing (1) is a cylinder.

9. A method for oil-gas separation based on the oil-gas separator of an oil-injection compressor according to any one of claims 1-8, characterized in that, Includes the following steps: The oil-gas mixture enters the interior of the separator shell (1) through the oil-gas mixture inlet (2) and moves downward through multiple layers of perforated plates. During the downward movement of the oil-gas mixture through each layer of perforated plates, some oil droplets are directly separated and fall to the bottom of the separator shell (1) by gravity. The other part of the oil droplets collide and aggregate in the space between two adjacent perforated plates due to the multiple vortices formed by the flow field, which increases the diameter of the oil droplets before they fall to the bottom of the separator shell (1) by gravity. The gas obtained from the oil-gas separation is discharged from the oil-gas mixture outlet (3) through the exhaust pipe (5). The oil obtained from the oil-gas separation is discharged through the oil outlet (4).

Images