An energy-saving dust collection device for fresh air pretreatment

Abstract

This invention proposes an energy-saving dust collection device for fresh air pretreatment, comprising an air inlet mounted on an exterior wall and a buffer dust collection device located inside the air inlet. The buffer dust collection device includes a housing, a spiral separation wall, and a dust collection device. The air inlet is connected to the input end of the housing, and the output end of the housing is connected to the rear fresh air equipment. The spiral separation wall comprises at least one row of spiral separation wall units, each row consisting of multiple spiral plate assemblies arranged horizontally at parallel intervals to cover the flow cross-section, creating a rotating / baffled path as fresh air passes through, separating and dropping windblown sand or large dust particles for collection by the dust collection device. An acrylic sight glass observation port is provided at the bottom of the housing, and a compressed air reserve valve is provided at the top of the housing for purging and cleaning. This device achieves fresh air pretreatment with low ventilation resistance, facilitating monitoring and maintenance.

Description

Technical Field

[0001] This invention relates to the field of fresh air treatment technology, and more specifically, to an energy-saving dust collection device for fresh air pretreatment. Background Technology

[0002] With the increasing prevalence of building ventilation systems, more and more projects are installing air inlets on exterior walls to introduce outdoor air into downstream ventilation units, air conditioning units, or fresh air handling equipment to achieve indoor ventilation and improve air quality. However, in areas with strong winds and sandstorms, near road dust / construction dust environments, or during seasonal sandstorms, outdoor fresh air often carries a large amount of windblown sand and large particulate dust. These particles are large in size and their concentration fluctuates significantly, easily accumulating at the air inlets and in the downstream ducts and housing, thus affecting the long-term stable operation of the ventilation system.

[0003] In existing technologies, to reduce the impact of particulate matter on downstream equipment, components such as wire mesh and coarse filters are typically installed at the air inlet or fresh air unit inlet to pre-treat particles before they enter the main filtration section. While these solutions can intercept or separate some large dust particles to a certain extent, they generally have the following shortcomings under conditions of high sand content, intermittent strong winds, or continuous dust storms:

[0004] On the one hand, coarse filters / filter media are easily clogged by wind and sand in a short period of time, resulting in a significant increase in pressure loss, increased fan load, increased energy consumption, and high frequency of replacement or cleaning, as well as high maintenance costs;

[0005] On the other hand, existing solutions often lack convenient online dust cleaning / blowing interfaces and reliable dust collection structures. During the dust cleaning process, dust is prone to fall back to the bottom of the housing or enter the downstream air duct, causing secondary pollution and making cleaning difficult.

[0006] Therefore, there is an urgent need for an energy-saving dust collection device for fresh air pretreatment, which can effectively separate and collect windblown sand or large particulate dust while ensuring low ventilation resistance, and also take into account the visual monitoring of dust accumulation, convenient dust cleaning and maintenance, and vibration and noise control, so as to improve the stability and energy efficiency of the fresh air system in high sand / dust environments. Summary of the Invention

[0007] In view of this, in order to solve the problems of easy clogging, increased pressure loss and energy consumption, and easy secondary dust generation in existing fresh air inlets under windy sand or large dust conditions, this application proposes an energy-saving dust collection device for filtering windy sand or large dust particles. A buffer dust removal device is set inside the air inlet, and low-resistance pre-separation is achieved through a spiral separation wall inside the box, which works in conjunction with the dust collection device to collect particles. At the same time, a sight glass observation port and a compressed air purging interface are set to facilitate monitoring and dust removal, thereby improving the efficiency, stability and ease of operation and maintenance of fresh air pretreatment.

[0008] An energy-saving dust collection device for fresh air pretreatment, used to pretreatment of fresh air entering a building, includes an air inlet installed on the exterior wall and a buffer dust removal device installed at the air inlet away from the outdoor end.

[0009] The buffer dust removal device includes a housing, a spiral separation wall disposed inside the housing, and a dust collection device; the air inlet is connected to the input end of the housing, and the output end of the housing is used to connect to the equipment that provides fresh air at the rear;

[0010] The spiral separation wall includes at least one row of spiral separation wall units, each row of spiral separation wall units is composed of multiple spiral plate assemblies; the multiple spiral plate assemblies are arranged in parallel and spaced apart in a transverse direction perpendicular to the airflow direction to form a continuous separation surface and cover the flow section of the box, so that when the fresh air passes through the spiral separation wall, a rotating / baffle path is formed to separate and drop windblown sand or large dust particles.

[0011] The dust collection device is located at the bottom of the housing and is arranged correspondingly to the spiral separation wall. It is used to collect the wind sand or large dust particles separated and falling by the spiral separation wall. An acrylic sight glass observation port is provided at the bottom of the housing to observe the dust accumulation and blockage status of the spiral separation wall. A compressed air reserve valve is provided at the top of the housing to blow away dust with compressed air when the spiral separation wall is blocked.

[0012] In some embodiments, a buffer cavity is formed between the input end of the housing and the spiral separation wall, and the ventilation cross-sectional area of ​​the buffer cavity is larger than the ventilation cross-sectional area of ​​the air inlet, so that the incoming fresh air is decelerated and evenly distributed before entering the spiral separation wall.

[0013] In some embodiments, each spiral plate assembly includes a spiral plate body, which is a central axisless spiral strip plate integrally formed from strip-shaped sheet material and continuously extending along the axial direction. The spiral strip plate forms a multi-turn spiral rotation structure around the axial direction, and a spiral guide gap is formed between two adjacent spiral strip plates. When the fresh air passes through the spiral guide gap, it generates a tangential velocity component and forms a rotation / baffle path to achieve the separation of windblown sand or large dust particles by utilizing particle inertia and gravity settling. The spiral plate assembly is fixedly installed in the box to form the spiral separation wall.

[0014] Furthermore, the spiral plate body is made of SS304 stainless steel.

[0015] In some embodiments, the axes of multiple spiral plate assemblies within the same row of spiral separation wall units are parallel to each other and arranged side by side at transverse intervals to form a continuous separation surface, thereby covering the effective flow width of the housing.

[0016] In some embodiments, the plurality of spiral plate assemblies in the same row of spiral separation wall units include at least a first spiral plate assembly and a second spiral plate assembly in the transverse direction, and the pitch of the first spiral plate assembly is greater than the pitch of the second spiral plate assembly, and / or the spiral guide gap of the first spiral plate assembly is greater than the spiral guide gap of the second spiral plate assembly; and the first spiral plate assembly and the second spiral plate assembly are arranged alternately in the transverse direction to form a separation load distribution from coarse to fine in the same row, thereby improving filtration efficiency and reducing the risk of clogging.

[0017] In some embodiments, the dust collection device includes a plurality of dust collection hoppers corresponding to the spiral separation wall, with the upper end of each dust collection hopper positioned below the spiral separation wall to receive the separated and falling particles.

[0018] In some embodiments, the lower end of the dust hopper is connected to a detachable dust collection bin to facilitate regular dust removal and maintenance.

[0019] In some embodiments, a dust discharge port is provided at the lower end of the dust hopper, and a sealing opening and closing structure is provided at the dust discharge port to prevent air leakage and dust backflow when not discharging dust.

[0020] In some embodiments, the compressed air reserved valve is connected to the jet cleaning pipeline, which includes a main jet cleaning pipe and jet cleaning branch pipes respectively corresponding to the spiral plate assembly. The jet cleaning branch pipes are provided with multiple jet cleaning holes / nozzles, and the jet cleaning holes / nozzles are arranged facing the windward surface of the spiral plate or along its spiral tangential direction to achieve directional dust removal. The housing is provided with an inspection door or a removable side panel for easy maintenance.

[0021] In some embodiments, when the spiral separation wall includes multiple rows of spiral separation wall units, the structure of each row of spiral separation wall units is the same as that of a single row of spiral separation wall units. Each row of spiral separation wall units is formed by multiple spiral plate assemblies arranged in parallel at intervals along a transverse direction perpendicular to the airflow direction. The difference is that each row of spiral separation wall units is arranged back and forth along the airflow direction, and enhanced separation and graded filtration are achieved through the structural relationship between rows.

[0022] In some embodiments, adjacent rows of spiral separation wall units are spaced apart along the airflow direction to form an intermediate settling buffer zone between adjacent rows; and the spiral plate assemblies in the rear spiral separation wall units are arranged laterally offset relative to the spiral plate assemblies in the front spiral separation wall units to avoid forming a through straight airflow channel, so that the entrained sand or large dust particles can further settle in the intermediate settling buffer zone and fall into the dust collection device below.

[0023] In some implementations, the rear spiral separation wall units are arranged in a graded manner relative to the front spiral separation wall units, from upstream to downstream along the airflow direction. Specifically, the design pitch of the spiral plate assembly in the rear spiral separation wall unit is smaller than that in the front spiral separation wall unit, and / or the spiral guide gap of the spiral plate assembly in the rear spiral separation wall unit is smaller than that in the front spiral separation wall unit. This forms a series of graded filtration paths from coarse to fine, allowing the upstream row to preferentially separate large particles such as sand and dust, while the downstream row further separates smaller dust particles. This improves overall filtration efficiency and reduces the risk of single-row blockage while ensuring low ventilation resistance.

[0024] In some implementations, along the airflow direction from upstream to downstream, the effective opening ratio of the front row spiral separation wall unit is greater than that of the rear row spiral separation wall unit, and / or the number of spiral turns per unit flow area of ​​the front row spiral separation wall unit is less than that of the rear row spiral separation wall unit, so that the airflow achieves low-resistance buffer separation in the upstream row and enhanced swirling deflection separation in the downstream row, thereby achieving a balance between staged filtration and energy saving and drag reduction.

[0025] In some embodiments, the bottom of the enclosure is connected to the ground or foundation via a vibration isolation support structure. The vibration isolation support structure includes several spring vibration isolators, which are disposed between the enclosure and the ground to reduce vibration transmission and noise of the enclosure under conditions of air intake impact, dust cleaning and purging, and structural resonance.

[0026] In some embodiments, the upper and / or lower ends of the spring isolator are provided with rubber friction pads, which are used to provide damping and suppress noise and slippage generated by metal contact.

[0027] In some embodiments, the spring isolator consists of multiple vibration isolation supports distributed around the bottom of the housing, preferably four vibration isolation supports, which are respectively arranged at the four corners or the four surrounding load-bearing points of the bottom of the housing.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] Firstly, it achieves an integrated design of fresh air pretreatment and dust collection, improving system stability and energy efficiency. This invention installs a buffer dust removal device inside the air inlet of the building's exterior wall. A spiral separation wall within the casing pre-separates the fresh air carrying sand or large dust particles, and works in conjunction with a dust collection device to centrally collect these particles. This reduces wear, blockage, and pollution caused by particles directly entering the downstream fresh air equipment, allowing the fresh air system to maintain low pressure loss and stable airflow even under high sand content conditions.

[0030] Secondly, the invention constructs a low-resistance separation path with rotation and deflection, significantly reducing the clogging problem of "media-based pre-filtration". This invention uses a spiral plate assembly to form a spiral guide gap, allowing the airflow to acquire a tangential velocity component and form a rotational and deflected flow pattern. Separation is achieved by utilizing particle inertia and gravity settling. Compared to traditional planar filters or coarse filter media that quickly clog under wind and sand impact, this invention reduces the rate of pressure loss increase and extends the maintenance cycle.

[0031] Third, a buffer chamber is introduced to achieve deceleration and flow equalization, improving separation efficiency and suppressing secondary dust. By setting a buffer chamber between the inlet of the housing and the spiral separator wall, the fresh air is decelerated and evenly distributed before entering the spiral separator wall, reducing particle resuspension and local accumulation caused by local high-speed scouring, thereby improving the separation consistency and operational reliability of large dust particles.

[0032] Fourth, it achieves a closed-loop maintenance mechanism that enables visualization of dust accumulation and rapid dust removal, significantly improving the convenience of operation and maintenance. An acrylic sight glass observation port is set at the bottom of the housing, which can intuitively judge the dust accumulation and blockage status of the spiral separation wall; a compressed air reserved valve is set at the top of the housing and can be connected to the blower pipeline, which can perform directional blowing and dust removal when blockage tends to occur, restoring ventilation capacity without frequent disassembly, reducing downtime and manual maintenance costs.

[0033] Fifth, it possesses the capability for expanded grading filtration, adapting to different sand-laden conditions while balancing efficiency and resistance control. The spiral separation wall of this invention can be configured as one or more rows; within the same row, a load distribution from coarse to fine can be achieved through the alternating arrangement of spiral plate assemblies with different pitches / guide gaps; in multiple rows, series grading separation can be achieved through front-to-back intervals, staggered arrangements, and settling buffer zones, thereby obtaining better filtration efficiency and anti-clogging performance under varying sand-laden intensity conditions in different regions and seasons.

[0034] Sixth, it reduces vibration and noise transmission and improves structural reliability to meet long-term operation requirements. This invention can install spring vibration isolators and rubber friction pads between the enclosure and the ground to reduce vibration and noise transmission caused by air intake impact, dust cleaning, and structural resonance, thereby reducing the risk of loose connections and fatigue, and improving the reliability and comfort of long-term equipment operation. Attached Figure Description

[0035] Figure 1 This is a front view schematic diagram of the energy-saving dust collection device for fresh air pretreatment in Embodiments 1 and 2.

[0036] Figure 2 This is a side view schematic diagram of the energy-saving dust collection device for fresh air pretreatment in Embodiment 1.

[0037] Figure 3 This is a partially enlarged side view of the energy-saving dust collection device for fresh air pretreatment in Embodiment 1.

[0038] Figure 4 This is a side view schematic diagram of the energy-saving dust collection device for fresh air pretreatment in Embodiment 2.

[0039] Figure 5 This is a partially enlarged side view of the energy-saving dust collection device for fresh air pretreatment in Embodiment 2.

[0040] Explanation of main component symbols

[0041] Exterior wall 10; Air inlet 101;

[0042] Buffer dust removal device 20; housing 201; acrylic sight glass observation port 2011; compressed air reserve valve 2012;

[0043] Spiral separation wall 202; dust collection device 203; dust hopper 2031; dust collection bin 2032; sealing and opening / closing structure 2033;

[0044] Spiral plate assembly 204; Spiral plate body 2041; Spiral belt plate 2042;

[0045] Vibration isolation support structure 30; spring vibration isolator 301; rubber friction pad 302.

[0046] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation Example 1:

[0047] Traditional fresh air inlet pretreatment solutions generally have the following limitations in dealing with sandstorms or large particulate dust: On the one hand, existing technologies mostly use metal wire mesh, coarse filters, and other filter media interception structures for pretreatment. These structures are easily blocked by sandstorms in a short time under conditions of high sand content, intermittent strong wind impact, or continuous dust, resulting in a significant increase in pressure loss and a significant decrease in air volume. This leads to increased fan load and energy consumption, and requires frequent cleaning or replacement, resulting in high maintenance costs. It is difficult to balance filtration effect and energy-saving operation. On the other hand, existing solutions usually lack convenient online dust cleaning / purging interfaces and reliable dust collection structures. During the dust cleaning process, dust easily falls back and accumulates at the bottom of the housing or enters the downstream air duct, causing secondary pollution and cleaning difficulties, affecting the hygiene and operation and maintenance efficiency of the fresh air system.

[0048] To address the aforementioned issues, the applicant recognizes that fresh air pretreatment devices facing external wall air inlets cannot rely solely on the "filter interception" approach. Instead, a pre-separation path with both low resistance and high anti-clogging capability should be constructed, forming a closed-loop structure of "separation-sedimentation-collection." Furthermore, it should be equipped with intuitive monitoring methods for dust accumulation and online cleaning methods for rapid restoration of ventilation capacity to reduce maintenance costs and improve operational stability. Based on this, this application proposes installing a buffer dust removal device inside the air inlet. A spiral separation wall within the housing guides the fresh air to form a rotating / baffled path, utilizing particle inertia and gravity settling to effectively separate windblown sand or large dust particles. This is combined with a dust collection device for centralized particle collection. A sight glass observation port is also provided to visualize the clogging status, and a compressed air purging interface is reserved for online cleaning and maintenance. This improves fresh air pretreatment efficiency and system operational stability while ensuring low ventilation resistance, significantly enhancing energy efficiency and ease of maintenance.

[0049] like Figure 1-3 As shown, this application proposes an energy-saving dust collection device for fresh air pretreatment, which is used to pretreat fresh air entering the building, including an air inlet 101 installed on the exterior wall 10, and a buffer dust removal device 20 installed at the air inlet 101 away from the outdoor end.

[0050] The buffer dust removal device 20 includes a housing 201, a spiral separation wall 202 disposed inside the housing 201, and a dust collection device 203; the air inlet 101 is connected to the input end of the housing 201, and the output end of the housing 201 is used to connect to the equipment that provides fresh air at the rear.

[0051] The spiral separation wall 202 includes a row of spiral separation wall units, each row of spiral separation wall units being composed of multiple spiral plate assemblies 204; the multiple spiral plate assemblies 204 are arranged in parallel and spaced apart in a transverse direction perpendicular to the airflow direction to form a continuous separation surface and cover the flow section of the box 201, so that when fresh air passes through the spiral separation wall 202, a rotating / baffle path is formed to separate and drop windblown sand or large dust particles;

[0052] The dust collection device 203 is located at the lower part of the box 201 and is arranged correspondingly to the spiral separation wall 202, and is used to collect the wind sand or large dust particles separated and falling by the spiral separation wall 202.

[0053] An acrylic sight glass observation port 2011 is provided at the bottom of the housing 201 for observing the dust accumulation and blockage status of the spiral separation wall 202;

[0054] The top of the housing 201 is provided with a compressed air reserve valve 2012, which is used to purge and clean the dust with compressed air when the spiral separation wall 202 is blocked.

[0055] A buffer cavity is formed between the input end of the housing 201 and the spiral separation wall 202. The ventilation cross-sectional area of ​​the buffer cavity is larger than the ventilation cross-sectional area of ​​the air inlet 101, so that the incoming fresh air is decelerated and evenly distributed before entering the spiral separation wall 202.

[0056] Each spiral plate assembly 204 includes a spiral plate body 2041, which is a spiral strip plate 2042 without a central axis, integrally formed from a strip-shaped plate and continuously extending along the axial direction. The spiral strip plate 2042 forms a multi-turn spiral rotation structure around the axial direction, and a spiral guide gap is formed between two adjacent spiral strip plates 2042. When the fresh air passes through the spiral guide gap, it generates a tangential velocity component and forms a rotation / baffle path to achieve the separation of wind-blown sand or large dust particles by utilizing particle inertia and gravity settling. The spiral plate assembly 204 is fixedly installed in the housing 201 to form the spiral separation wall 202.

[0057] The spiral plate body 2041 is made of SS304 stainless steel.

[0058] The axes of multiple spiral plate assemblies 204 within the same row of spiral separation wall units are parallel to each other and are arranged side by side at transverse intervals to form a continuous separation surface, thereby covering the effective flow width of the housing 201.

[0059] The multiple spiral plate assemblies 204 in the same row of spiral separation wall units include at least a first spiral plate assembly 204 and a second spiral plate assembly 204 in the transverse direction, and the pitch of the first spiral plate assembly 204 is greater than the pitch of the second spiral plate assembly 204, and / or the spiral guide gap of the first spiral plate assembly 204 is greater than the spiral guide gap of the second spiral plate assembly 204.

[0060] Furthermore, the first spiral plate assembly 204 and the second spiral plate assembly 204 are arranged alternately in the transverse direction to form a separation load distribution from coarse to fine in the same row, thereby improving filtration efficiency and reducing the risk of clogging.

[0061] The dust collection device 203 includes a plurality of dust collection hoppers 2031 corresponding to the spiral separation wall 202. The upper end of each dust collection hopper 2031 is positioned below the spiral separation wall 202 to receive the separated and falling particles.

[0062] The lower end of the dust hopper 2031 is connected to the detachable dust collection bucket 3032 for regular dust removal and maintenance.

[0063] The lower end of the dust hopper 2031 is provided with a dust discharge port, and a sealing opening and closing structure 2033 is provided at the dust discharge port to prevent air leakage and dust backflow when not discharging dust.

[0064] The compressed air reserved valve 2012 is connected to the jet cleaning pipeline, which includes a main jet cleaning pipe and jet cleaning branch pipes respectively corresponding to the spiral plate assembly 204. The jet cleaning branch pipes are provided with multiple jet holes / nozzles, and the jet holes / nozzles are arranged facing the windward surface of the spiral plate or along its spiral tangential direction to achieve directional dust removal. The housing 201 is provided with an inspection door or a detachable side panel for easy maintenance.

[0065] The bottom of the housing 201 is connected to the ground or foundation through a vibration isolation support structure 30. The vibration isolation support structure 30 includes several spring vibration isolators 301, which are arranged between the housing 201 and the ground to reduce the vibration transmission and noise of the housing 201 under conditions of air intake impact, dust cleaning and purging, and structural resonance.

[0066] The upper and / or lower ends of the spring isolator 301 are provided with rubber friction pads 302, which are used to provide damping and suppress noise and slippage generated by metal contact.

[0067] The spring vibration isolator 301 consists of multiple vibration isolation supports distributed around the bottom circumference of the housing 201, preferably four vibration isolation supports, which are respectively arranged at the four corners or the four surrounding load-bearing points of the bottom of the housing 201. Example 2:

[0068] like Figure 1 , 4 As shown in Figure 5, an energy-saving dust collection device for fresh air pretreatment is used to pretreatment the fresh air entering the building, including an air inlet 101 installed on the exterior wall 10, and a buffer dust removal device 20 installed at the air inlet 101 away from the outdoor end.

[0069] The buffer dust removal device 20 includes a housing 201, a spiral separation wall 202 disposed inside the housing 201, and a dust collection device 203; the air inlet 101 is connected to the input end of the housing 201, and the output end of the housing 201 is used to connect to the equipment that provides fresh air at the rear.

[0070] The spiral separation wall 202 includes at least one row of spiral separation wall units, each row of spiral separation wall units being composed of multiple spiral plate assemblies 204; the multiple spiral plate assemblies 204 are arranged in parallel and spaced apart in a transverse direction perpendicular to the airflow direction to form a continuous separation surface and cover the flow section of the housing 201, so that when fresh air passes through the spiral separation wall 202, a rotating / baffle path is formed to separate and drop windblown sand or large dust particles;

[0071] The dust collection device 203 is located at the lower part of the box 201 and is arranged correspondingly to the spiral separation wall 202, and is used to collect the wind sand or large dust particles separated and falling by the spiral separation wall 202.

[0072] An acrylic sight glass observation port 2011 is provided at the bottom of the housing 201 for observing the dust accumulation and blockage status of the spiral separation wall 202;

[0073] The top of the housing 201 is provided with a compressed air reserve valve 2012, which is used to purge and clean the dust with compressed air when the spiral separation wall 202 is blocked.

[0074] A buffer cavity is formed between the input end of the housing 201 and the spiral separation wall 202. The ventilation cross-sectional area of ​​the buffer cavity is larger than the ventilation cross-sectional area of ​​the air inlet 101, so that the incoming fresh air is decelerated and evenly distributed before entering the spiral separation wall 202.

[0075] Each spiral plate assembly 204 includes a spiral plate body 2041, which is a spiral strip plate 2042 without a central axis, integrally formed from a strip-shaped plate and continuously extending along the axial direction. The spiral strip plate 2042 forms a multi-turn spiral rotation structure around the axial direction, and a spiral guide gap is formed between two adjacent spiral strip plates 2042. When the fresh air passes through the spiral guide gap, it generates a tangential velocity component and forms a rotation / baffle path to achieve the separation of wind-blown sand or large dust particles by utilizing particle inertia and gravity settling. The spiral plate assembly 204 is fixedly installed in the housing 201 to form the spiral separation wall 202.

[0076] Furthermore, the spiral plate body 2041 is made of SS304 stainless steel.

[0077] The axes of multiple spiral plate assemblies 204 within the same row of spiral separation wall units are parallel to each other and are arranged side by side at transverse intervals to form a continuous separation surface, thereby covering the effective flow width of the housing 201.

[0078] The multiple spiral plate assemblies 204 in the same row of spiral separation wall units include at least a first spiral plate assembly 204 and a second spiral plate assembly 204 in the transverse direction, and the pitch of the first spiral plate assembly 204 is greater than the pitch of the second spiral plate assembly 204, and / or the spiral guide gap of the first spiral plate assembly 204 is greater than the spiral guide gap of the second spiral plate assembly 204.

[0079] Furthermore, the first spiral plate assembly 204 and the second spiral plate assembly 204 are arranged alternately in the transverse direction to form a separation load distribution from coarse to fine in the same row, thereby improving filtration efficiency and reducing the risk of clogging.

[0080] The dust collection device 203 includes a plurality of dust collection hoppers 2031 corresponding to the spiral separation wall 202. The upper end of each dust collection hopper 2031 is positioned below the spiral separation wall 202 to receive the separated and falling particles.

[0081] The lower end of the dust hopper 2031 is connected to the detachable dust collection bucket 3032 for regular dust removal and maintenance.

[0082] The lower end of the dust hopper 2031 is provided with a dust discharge port, and a sealing opening and closing structure 2033 is provided at the dust discharge port to prevent air leakage and dust backflow when not discharging dust.

[0083] The compressed air reserved valve 2012 is connected to the jetting pipeline, which includes a jetting main pipe and jetting branch pipes respectively corresponding to the spiral plate assembly 204. The jetting branch pipes are provided with multiple jetting holes / nozzles, and the jetting holes / nozzles face the windward surface of the spiral plate or are arranged along its spiral tangential direction to achieve directional dust removal.

[0084] The enclosure 201 is equipped with an inspection door or a removable side panel for easy maintenance.

[0085] When the spiral separation wall 202 includes multiple rows of spiral separation wall units, the structure of each row of spiral separation wall units is the same as that of a single row of spiral separation wall units. Each row of spiral separation wall units is formed by multiple spiral plate assemblies 204 arranged in parallel with a horizontal spacing perpendicular to the airflow direction. The difference is that each row of spiral separation wall units is arranged back and forth along the airflow direction, and enhanced separation and graded filtration are achieved through the structural relationship between rows.

[0086] The adjacent rows of spiral separation wall units are spaced apart along the airflow direction to form an intermediate settling buffer zone between the two adjacent rows; and the spiral plate assembly 204 in the rear row of spiral separation wall units is arranged laterally offset relative to the spiral plate assembly 204 in the front row of spiral separation wall units to avoid forming a through straight airflow channel, so that the entrained sand or large dust particles can further settle in the intermediate settling buffer zone and fall into the dust collection device 203 below.

[0087] Along the airflow direction from upstream to downstream, the rear spiral separation wall unit forms a graded arrangement relative to the front spiral separation wall unit. Specifically, the design pitch of the spiral plate assembly 204 in the rear spiral separation wall unit is smaller than that in the front spiral separation wall unit, and / or the spiral guide gap of the spiral plate assembly 204 in the rear spiral separation wall unit is smaller than that in the front spiral separation wall unit. This forms a series graded filtration path from coarse to fine, allowing the upstream row to preferentially separate large particles such as sand and dust, while the downstream row further separates smaller dust particles. This improves the overall filtration efficiency and reduces the risk of single-row blockage while ensuring low ventilation resistance.

[0088] Along the airflow direction from upstream to downstream, the effective opening ratio of the front row spiral separation wall unit is greater than that of the rear row spiral separation wall unit, and / or the number of spiral turns per unit flow area of ​​the front row spiral separation wall unit is less than that of the rear row spiral separation wall unit, so that the airflow achieves low-resistance buffer separation in the upstream row and enhanced swirling deflection separation in the downstream row, thereby achieving a balance between staged filtration and energy saving and drag reduction.

[0089] The bottom of the housing 201 is connected to the ground or foundation through a vibration isolation support structure 30. The vibration isolation support structure 30 includes several spring vibration isolators 301, which are arranged between the housing 201 and the ground to reduce the vibration transmission and noise of the housing 201 under conditions of air intake impact, dust cleaning and purging, and structural resonance.

[0090] The upper and / or lower ends of the spring isolator 301 are provided with rubber friction pads 302, which are used to provide damping and suppress noise and slippage generated by metal contact.

[0091] The spring vibration isolator 301 consists of multiple vibration isolation supports distributed around the bottom circumference of the housing 201, preferably four vibration isolation supports, which are respectively arranged at the four corners or the four surrounding load-bearing points of the bottom of the housing 201.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An energy-saving dust collection device for fresh air pretreatment, characterized in that, It includes an air inlet installed on the exterior wall, and a buffer dust removal device installed at the air inlet away from the outdoor end; The buffer dust removal device includes a housing, a spiral separation wall installed inside the housing, and a dust collection device. The air inlet is connected to the input end of the housing, and the output end of the housing is used to connect to the equipment that provides fresh air at the rear. The spiral separation wall includes at least one row of spiral separation wall units, and each row of spiral separation wall units is composed of multiple spiral plate assemblies; The multiple spiral plate assemblies are arranged in parallel and spaced apart in a transverse direction perpendicular to the airflow direction to form a continuous separation surface and cover the flow section of the box, so that when the fresh air passes through the spiral separation wall, a rotating / baffle path is formed to separate and drop sand or large dust particles. The dust collection device is located at the bottom of the box and is arranged correspondingly to the spiral separation wall; An acrylic sight glass viewing port is provided at the bottom of the enclosure; a compressed air reserve valve is provided at the top of the enclosure.

2. The energy-saving dust collection device for fresh air pretreatment according to claim 1, characterized in that, A buffer cavity is formed between the input end of the housing and the spiral separation wall. The ventilation cross-sectional area of ​​the buffer cavity is larger than that of the air inlet, so that the incoming fresh air is decelerated and evenly distributed before entering the spiral separation wall.

3. The energy-saving dust collection device for fresh air pretreatment according to claim 1, characterized in that, Each of the spiral plate assemblies includes a spiral plate body, which is a central axisless spiral strip plate integrally formed from a strip-shaped plate and continuously extending along the axial direction. The spiral strip plate forms a multi-turn spiral rotation structure around the axial direction, and a spiral flow guiding gap is formed between two adjacent spiral strip plates.

4. The energy-saving dust collection device for fresh air pretreatment according to claim 3, characterized in that, The spiral plate body is made of SS304 stainless steel.

5. The energy-saving dust collection device for fresh air pretreatment according to claim 1, characterized in that, The axes of multiple spiral plate assemblies within the same row of spiral separation wall units are parallel to each other and are arranged side by side at transverse intervals to form a continuous separation surface, thereby covering the effective flow width of the housing.

6. The energy-saving dust collection device for fresh air pretreatment according to claim 1 or 5, characterized in that, The multiple spiral plate assemblies in the same row of spiral separation wall units include at least a first spiral plate assembly and a second spiral plate assembly in the transverse direction, and the pitch of the first spiral plate assembly is greater than the pitch of the second spiral plate assembly, and / or the spiral guide gap of the first spiral plate assembly is greater than the spiral guide gap of the second spiral plate assembly; and the first spiral plate assembly and the second spiral plate assembly are arranged alternately in the transverse direction to form a separation load distribution from coarse to fine in the same row, thereby improving filtration efficiency and reducing the risk of clogging.

7. The energy-saving dust collection device for fresh air pretreatment according to claim 1, characterized in that, The dust collection device includes multiple dust collection hoppers corresponding to the spiral separation wall. The upper end of each dust collection hopper is positioned below the spiral separation wall to receive the separated and falling particles.

8. The energy-saving dust collection device for fresh air pretreatment according to claim 7, characterized in that, The lower end of the dust hopper is connected to a detachable dust collection bucket for regular dust removal and maintenance.

9. The energy-saving dust collection device for fresh air pretreatment according to claim 7 or 8, characterized in that, The lower end of the dust hopper is provided with a dust discharge port, and the dust discharge port is provided with a sealing opening and closing structure to prevent air leakage and dust backflow when not discharging dust.

10. The energy-saving dust collection device for fresh air pretreatment according to claim 1, characterized in that, The compressed air reserved valve is connected to the jetting pipeline, which includes a main jetting pipe and jetting branch pipes respectively corresponding to the spiral plate assembly. The jetting branch pipes are provided with multiple jetting holes / nozzles, and the jetting holes / nozzles are arranged facing the windward surface of the spiral plate or along its spiral tangential direction to achieve directional dust removal.

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