A multi-faceted cross-flow filtration air cylinder with spiral cross-flow filtration

Abstract

The present invention relates to the field of dust collection technology, and in particular to a multi-faceted cross-flow filtration air cylinder with spiral cross-flow filtration, comprising an inner channel, a middle channel and an outer channel arranged from the inside to the outside, the outer channel being a tubular structure, the outer end of which is closed, and the inner end is provided with an outer outlet, the middle channel being a conical structure sleeved inside the outer channel, the outer diameter of which gradually decreases from the outer end to the inner end, the outer end of which is provided with an inlet, and the inner end of which is connected to the concentrated dust outlet channel; the inner channel being a conical structure sleeved inside the middle channel, the inner diameter of which gradually increases from the outer end to the inner end, the outer end of which is closed, and the inner end of which is provided with an inner outlet; an inner filter tube is arranged between the middle channel and the inner channel, and an outer filter tube is arranged between the middle channel and the outer channel. The present invention can be applied to the pretreatment of large-volume dust-containing airflow, realizing a large amount of early diversion of clean air and effective concentration of dust-containing airflow, thereby reducing the overall operating resistance of the dust removal system.

Description

Technical Field

[0001] The invention relates to the technical field of dust collection, and in particular to a multi-faceted cross-flow filtering air cylinder with spiral cross-flow filtering. Background Art

[0002] Dust pollution is everywhere in industrial production. Industrial dust can cause different diseases according to its pathological characteristics and action characteristics, especially great damage to the lungs. For the surrounding environment, dust can corrode buildings, adhere to the surface of plants, affect their photosynthesis, and inhibit plant growth. When certain dust is not properly controlled and the concentration is high, it may cause dust explosions.

[0003] Filter dust removal is the most widely used dust removal equipment for preventing and controlling air pollution. Improving the dust removal function of filtering equipment is of great significance for industrial production applications. The current filter dust collectors used in industrial production have high dust removal efficiency, but they are not effective in treating large air volumes of dust-containing gases (such as tunneling work faces, where ventilation and dust removal are integrated, and ventilation is not only used for dust removal, but also for diluting toxic and harmful gases generated by the operation). The operating resistance is too large. Even if a composite dust removal system is used, such as using a coarse-effect cyclone dust collector for pre-treatment at the front end of the filter dust removal, all air volumes still need to pass through the filter dust removal system, and the problem of excessive operating resistance has not been effectively solved.

[0004] The national patent with publication number CN 112473309 A discloses a composite dust collection system with cross-flow filtration, which adopts the design of a double-layer spiral cross-filter wind tube, uses the wind tube space for cross-flow filtration, and diverts clean air from the cross-filter wind tube in advance, reducing the air volume in the subsequent dead-end filtration system and reducing the overall operating resistance of the composite dust removal system. However, the wind flow resistance of the double-layer spiral cross-filter wind tube provided by it is relatively large, which needs to be further reduced by design.

[0005] Based on the above reasons, the present invention proposes a multi-faceted cross-flow filtration air duct with spiral cross-flow filtration. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-faceted cross-flow filtration air duct with spiral cross-flow filtration. Double-layer cross-flow filtration and spiral cross-flow filtration are used to jointly improve the dust-laden airflow processing capacity, and a complementary cross-section gradient design is used to reduce the local airflow resistance. It can be applied to the pretreatment of large-volume dust-laden airflows, achieve a large amount of early diversion of clean air, and effectively concentrate the dust-laden airflow, thereby reducing the overall operating resistance of the dust removal system.

[0007] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0008] The present invention discloses a multi-faceted cross-flow filtration air duct with spiral cross-flow filtration, comprising an inner channel, a middle channel and an outer channel arranged from the inside to the outside, the outer channel being a tubular structure, the outer end of which is closed, and the inner end of which is provided with an outer outlet, the middle channel being a conical structure sleeved inside the outer channel, the outer diameter of which gradually decreases from the outer end to the inner end, the outer end of which is provided with an inlet, and the inner end of which is connected to a concentrated dust outlet channel; the inner channel being a conical structure sleeved inside the middle channel, the inner diameter of which gradually increases from the outer end to the inner end, the outer end of which is closed, and the inner end of which is provided with an inner outlet; an inner filter tube is provided between the middle channel and the inner channel, and an outer filter tube is provided between the middle channel and the outer channel.

[0009] A spiral channel is arranged inside the middle channel, and the spiral channel is composed of a plurality of spiral filter plates. An external air outlet is arranged at the intersection of the spiral channel and the outer filter tube, and an internal air outlet is arranged at the intersection of the spiral channel and the inner filter tube.

[0010] The distance between adjacent spiral filter plates gradually increases from the outer air outlet to the inner air outlet.

[0011] The distance between adjacent spiral filter plates increases at an expansion angle of 3 to 5 degrees from the outer air outlet to the inner air outlet.

[0012] The spiral filter plate is made of porous material.

[0013] The spiral filter plate is a ceramic filter element, a stainless steel filter element or a sintered plate filter element.

[0014] The beneficial effects of the present invention are:

[0015] 1. The design of the spiral cross-flow channel increases the processing area and improves the purification efficiency. The air duct provided by the present invention adopts three-layer channels and two cross-flow filter surfaces, which is conducive to increasing the dust-containing airflow processing area; a spiral channel is set in the middle-layer channel. On the one hand, it is conducive to the airflow flowing in the middle-layer channel in a spiral form and improving the flushing effect on the dust cake deposited on the two cross-flow filter surfaces. On the other hand, the spiral channel itself is designed as a channel with cross-flow filtering function, which further increases the dust-containing airflow processing area, realizes multi-faceted parallel connection, and enables more clean air to be diverted in advance.

[0016] 2. Complementary cross-section gradient design avoids excessive local resistance. Based on the change of air volume along the inner, middle and outer three-layer channels, the cross-section gradient design of each channel is adopted under the premise of maintaining the original shape of the wind tube, which is conducive to avoiding the concentration of wind flow in the cross section of the channel and reducing the local resistance of wind flow in the channel. In addition, the outer narrow and inner wide structure is adopted in the spiral channel, which can keep the overall cross-section size of the inner and outer outlets of the spiral channel close, which is conducive to avoiding excessive local resistance caused by wind flow concentration.

[0017] 3. As a pretreatment technology, it can effectively reduce the operating load of the subsequent dust removal system. When the design provided by the present invention is applied to the pretreatment of large-volume dust-containing airflow, a large amount of clean air can be diverted in advance and the dust concentration of the airflow entering the subsequent dust treatment system can be concentrated, which can significantly reduce the load of the subsequent dust removal system and reduce the overall operating resistance. It can also reduce the scale of the subsequent dust removal system and reduce the overall investment and operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention.

[0019] In the figure: 1. outer filter tube, 2. inner filter tube, 3. spiral filter plate, 4. inner channel, 5. middle channel, 6. outer channel, 7. outer air outlet, 8 spiral channel, 10. dust outlet channel, 11. inner air outlet, 12. outer outlet, 13. inlet. DETAILED DESCRIPTION

[0020] The present invention is further described below:

[0021] See also Figure 1 ,

[0022] The present invention discloses a multi-faceted cross-flow filtration air duct with spiral cross-flow filtration, comprising an inner channel 4, a middle channel 5 and an outer channel 6 arranged from the inside to the outside, the outer channel 6 is a tubular structure, the outer end of which is closed, and the inner end is provided with an outer outlet 12, the middle channel 5 is a conical structure sleeved inside the outer channel 6, the outer diameter of which gradually decreases from the outer end to the inner end, the outer end is provided with an inlet 13, and the inner end is connected with a concentrated dust outlet channel 10; the inner channel 4 is a conical structure sleeved on the inner side of the middle channel 5, the inner diameter of which gradually increases from the outer end to the inner end, the outer end is closed, and the inner end is provided with an inner outlet; an inner filter tube 2 is provided between the middle channel 5 and the inner channel 4, and an outer filter tube 1 is provided between the middle channel 5 and the outer channel 6, and the use of three-layer channels and two cross-flow filtration surfaces is beneficial to increasing the dust-containing airflow processing area. When used for the pretreatment of large-volume dusty airflow, it can divert a large amount of clean air in advance and concentrate the dust concentration of the airflow entering the subsequent dust treatment system, significantly reducing the load of the subsequent dust removal system and reducing the overall operating resistance. It can also reduce the scale of the subsequent dust removal system and reduce the overall investment and operation and maintenance costs.

[0023] A spiral channel 8 is provided inside the middle-layer channel 5, and the spiral channel 8 is composed of a plurality of spiral filter plates 3. An external air outlet 7 is provided at the intersection of the spiral channel 8 and the outer filter tube 1, and an internal air outlet 11 is provided at the intersection with the inner filter tube 2. The spiral channel is provided in the middle-layer channel. On the one hand, it is beneficial for the wind flow to flow in the middle-layer channel in a spiral form and improve the flushing effect on the dust cake deposited on the two cross-flow filter surfaces. On the other hand, the spiral channel itself is designed as a channel with a cross-flow filtering function, which further increases the dust-containing airflow processing area and realizes multi-faceted parallel connection, so that more clean air can be diverted in advance.

[0024] The distance between adjacent spiral filter plates 3 gradually increases from the outer air outlet 7 to the inner air outlet 11 .

[0025] The distance between adjacent spiral filter plates 3 increases at an expansion angle of 3 to 5 degrees from the external air outlet 7 to the internal air outlet 11, and the dust concentration of the air flow in the middle channel 5 increases (concentrated). The flow rate of the gas in the channel attempts to gradually decrease. However, due to the design of the gradually decreasing cross-section of the middle channel 5, the gas flow rate will not decrease due to the decrease in the total amount of gas in the filter channel, thereby ensuring the shear force of the wind flow to flush the dust cake.

[0026] The spiral filter plate 3 is made of a porous material. Preferably, the spiral filter plate 3 is a ceramic filter element, a stainless steel filter element, or a sintered plate filter element.

[0027] Working principle:

[0028] The dust-laden airflow enters from the left inlet 13 of the middle channel 5 of the filter air cylinder, and due to the guiding effect of the spiral channel 8, the dust-laden airflow rotates and flows in the middle channel 5.

[0029] The clean airflow can pass through the inner filter tube 2 into the inner channel 4, or pass through the outer filter tube 1 into the outer channel 6, or pass through the spiral filter plate 3 into the spiral channel 8. The airflow entering the spiral channel 8 can enter the inner channel 4 through the inner air outlet 11 or enter the outer channel 6 through the outer air outlet 7, while the dust in the airflow is correspondingly intercepted on the outer wall of the inner conical filter tube 2, the outer wall of the outer filter tube 1 and the outer wall of the spiral filter plate 3 and attempts to deposit to form a dust cake. The dust cake that attempts to deposit is washed away by the shear force generated by the rotating airflow in the middle channel and continues to rotate along the air duct with the airflow.

[0030] As a large amount of clean gas leaves, the dust concentration of the airflow in the middle channel 5 increases (concentrated), and the gas flow rate in the channel attempts to gradually decrease. However, due to the design of the gradually decreasing cross-section of the middle channel 5, the gas flow rate will not decrease due to the decrease in the total amount of gas in the filter channel, thereby ensuring the shear force of the wind flow to flush the dust cake.

[0031] The clean airflow in the inner channel 4, the outer channel 6 and the spiral channel 8 is discharged through the respective outlets; and the dusty airflow in the middle conical channel 5 enters the next device of the dust removal system through the concentrated dust outlet channel 10.

[0032] Through multi-faceted and multi-directional cross-flow filtration between the inner layer and the middle layer, between the middle layer and the outer layer, and on the spiral layer, the cross-flow filtration area is increased, making it easier for clean airflow to be separated from dusty airflow in large quantities and quickly.

[0033] Through the complementary cross-sectional gradient design of the inner, middle and outer channels and the channel size design of the spiral layer that is wide inside and narrow outside, the wind speed of each airflow section is kept relatively stable, preventing excessive local resistance and maintaining overall smooth airflow and small operating resistance.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A multi-faceted cross-flow filtration air duct with spiral cross-flow filtration, characterized in that: The invention comprises an inner channel (4), a middle channel (5) and an outer channel (6) arranged from the inside to the outside, wherein the outer channel (6) is a tubular structure, the outer end of which is closed, and the inner end of which is provided with an outer outlet (12); the middle channel (5) is a conical structure and is sleeved inside the outer channel (6), and the outer diameter of the middle channel (5) gradually decreases from the outer end to the inner end, and the outer end of the middle channel is provided with an inlet (13), and the inner end of the middle channel is connected to the concentrated dust outlet channel (10); the inner channel (4) is a conical structure and is sleeved inside the middle channel (5), and the inner diameter of the middle channel (5) increases from the outer end to the inner end. The ends of the middle channel (5) gradually increase in size, the outer end of the middle channel (5) is closed, and the inner end is provided with an inner layer outlet; an inner layer filter tube (2) is provided between the middle channel (5) and the inner layer channel (4), and an outer layer filter tube (1) is provided between the middle channel (5) and the outer layer channel (6); a spiral channel (8) is provided inside the middle channel (5), and the spiral channel (8) is composed of a plurality of spiral filter plates (3); an outer air outlet (7) is provided at the intersection of the spiral channel (8) and the outer layer filter tube (1), and an inner air outlet (11) is provided at the intersection of the spiral channel (8) and the inner layer filter tube (2); The spacing between adjacent spiral filter plates (3) gradually increases from the outer air outlet (7) to the inner air outlet (11); the spiral filter plates (3) are made of porous material.

2. The multi-faceted cross-flow filtration air duct with spiral cross-flow filtration according to claim 1, characterized in that: The spiral filter plate (3) is a ceramic filter element, a stainless steel filter element, or a sintered plate filter element.

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