Negative pressure dust collection device

Abstract

An embodiment of the utility model provides a negative pressure dust collection device, which relates to the technical field of dust collection devices and comprises a dust collection unit, the dust collection unit comprises a first box body, a second box body and a third box body which are used for supporting and mounting, a blowing unit is mounted in the third box body, and a filter bag part is mounted in the second box body. Dust-containing gas enters the first box body from the gas inlet, large-particle dust directly falls into the first box body after being separated, other dust enters a filtering area of the filtering bag part of the second box body along with gas flow, and filtered clean gas penetrates through the filtering bag part and is exhausted through a gas exhaust pipeline which is arranged on one side of the third box body and connected with a centrifugal blower.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, in particular to a negative pressure dust suction device. Background Art

[0002] A dust collector is a device that separates dust from flue gas, also known as a dust removal device. The performance of a dust collector is expressed by the amount of gas that can be processed, the pressure loss when the gas passes through the dust collector, and the dust removal efficiency. At the same time, the price of the dust collector, the operation and maintenance costs, the length of service life, and the ease of operation and management are also important factors to consider its performance. Dust collectors are commonly used facilities in boilers and industrial production. They are widely used in ventilation and dust removal in industrial and mining enterprises such as mines, metallurgy, machinery manufacturing, chemical products, cement building materials, and grain processing, and have received good results in improving the environment and preventing air pollution.

[0003] Due to the relatively large amount of dust in the working environment of the dust collector, as the filtration process continues, a layer of dust will gradually accumulate on the surface of the filter bag. This not only reduces the efficiency of gas passing through the filter bag but also may cause an increase in pressure loss, thereby affecting the operation effect of the entire system. Therefore, it is necessary to clean the dust collector regularly to ensure its normal operation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a negative pressure dust suction device, which can avoid the problem that as the filtration process continues, a layer of dust will gradually accumulate on the surface of the filter bag, which not only reduces the efficiency of gas passing through the filter bag but also may cause an increase in pressure loss.

[0005] The utility model provides a negative pressure dust suction device, including:

[0006] A dust suction unit, and a centrifugal blower installed on one side of the dust suction unit. The centrifugal blower is connected to the dust suction unit through an air extraction pipeline, and a jetting unit is also arranged at the upper end of the dust suction unit;

[0007] A dust suction unit, which includes a first box body, a second box body, and a third box body for supporting installation. The jetting unit is installed inside the third box body, and a filter bag part is installed inside the second box body;

[0008] A jetting unit, which includes a jetting pipe and an air pipeline installed at the upper end of the flower plate. The jetting pipes respectively correspond to each group of filter bag parts one by one, and the lower ends of the jetting pipes are respectively connected to a manifold;

[0009] An electromagnetic pulse valve is installed at the bending part of the air pipeline, and the lower end of the electromagnetic pulse valve is connected to the manifold.

[0010] Preferably, a dust outlet is opened at the lower end of the first box body, and the first box body is arranged in a funnel shape.

[0011] Preferably, a flower plate is fixedly installed at the connection of the first box body, the second box body and the third box body, the blowing unit is arranged at the upper end of the flower plate, and an installation notch is opened at the upper end of the flower plate.

[0012] Preferably, the filter bag part includes a framework fixedly installed at the lower end of the flower plate and a filter bag body sleeved on the upper end of the framework, and both ends of the filter bag body are sleeved on the ends of the framework.

[0013] Preferably, a climbing frame is fixedly installed on one side of the box body of the dust suction unit, a maintenance platform is fixedly installed on one side of the climbing frame, and the blowing unit extends to the installation part outside the box body of the dust suction unit and is installed on the upper end of the maintenance platform.

[0014] Preferably, a closing nozzle is fixedly installed inside the slot hole of the flower plate.

[0015] Preferably, a stamping short pipe is correspondingly arranged at the upper end of the closing nozzle.

[0016] Preferably, a partition sheet made of silica gel material is movably installed at the lower end of the stamping short pipe, the outer side of the partition sheet is fixedly installed inside the connecting ring, and the connecting ring is threadedly installed inside the lower end of the stamping short pipe.

[0017] A negative pressure dust suction device provided by an embodiment of the present invention, the dust-containing gas enters the first box body from the air inlet, the large-particle dust is separated and directly falls into the first box body, and the remaining dust enters the filter area of the filter bag part of the second box body along with the air flow. The filtered clean gas passes through the filter bag part and is discharged through the air extraction pipeline arranged on one side of the third box body and connected to the centrifugal blower. As the filtering operation proceeds, when the surface of the filter bag part accumulates dust to a certain amount, the dust cleaning control device triggers the electromagnetic pulse valve in sequence according to the set program. The compressed air in the air distribution package is instantaneously sprayed out from the holes of the stamping short pipe of the air pipeline through the electromagnetic pulse valve and enters the filter bag body. The filter bag body expands suddenly, so that the dust accumulated on the surface of the filter bag body falls off, the filter bag body is cleaned, and the removed dust falls into the first box body and is discharged through the ash discharge valve. In this way, the dust accumulated on the filter bag body is pulsed and cleaned periodically, so that the purified gas can pass through normally, and the operation of the dust removal system is ensured. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without creative efforts.

[0019] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the dust collection unit of an embodiment of the present utility model.

[0021] Figure 3 This is a schematic diagram of the installation structure of the filter bag part of an embodiment of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the filter bag part of an embodiment of the present utility model.

[0023] Figure 5 This is a schematic diagram of the installation structure of the climbing frame of an embodiment of the present utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the maintenance platform of an embodiment of the present utility model.

[0025] Figure 7 This is an embodiment of the present utility model Figure 5 The enlarged structure schematic diagram at position A.

[0026] Figure 8 This is an embodiment of the present utility model Figure 3 The enlarged structure schematic diagram at position B.

[0027] Figure 9 This is a schematic diagram of the structure of the stamping short pipe of an embodiment of the present utility model.

[0028] Description of the drawings: 100, dust collection unit; 110, first box body; 111, air inlet; 112, dust outlet; 120, second box body; 130, third box body; 131, air outlet; 140, filter bag part; 141, filter bag body; 142, framework; 150, flower plate; 151, closing nozzle; 160, climbing frame; 161, maintenance platform; 200, centrifugal blower; 210, exhaust pipe; 220, suction pipeline; 300, spraying unit; 310, spraying pipe; 320, air distribution header; 330, air pipeline; 340, electromagnetic pulse valve; 350, stamping short pipe; 351, connecting ring; 352, baffle. Detailed implementation manners

[0029] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0030] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0032] In the embodiments of the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present utility model. To simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] To better understand the purpose, structure and function of the present utility model, the following further describes in detail a negative pressure dust collection device of the present utility model with reference to the drawings.

[0035] As Figures 1-9As shown in the figure, an embodiment of the present utility model provides a negative pressure dust collection device, including a dust collection unit 100 for collecting dust and storing it, and a centrifugal blower 200 installed on one side of the dust collection unit 100 to provide wind power for dust collection. The centrifugal blower 200 is connected to the dust collection unit 100 through an extraction pipeline 220. A blowing unit 300 for cleaning the dust collection unit 100 is also arranged at the upper end of the dust collection unit 100.

[0036] The dust collection unit 100 includes a first box body 110, a second box body 120, and a third box body 130 for supporting installation. The blowing unit 300 is installed inside the third box body 130. A filter bag part 140 for filtering the incoming air is installed inside the second box body 120. Air enters from inside the air inlet 111 fixedly installed on one side of the first box body 110, is transported upward for filtration, and the filtered air is discharged from the air outlet 131 arranged on one side of the third box body 130, and is transported to the exhaust pipe 210 through the centrifugal blower 200, and then the filtered air is discharged to the boiler tail flue and emptied.

[0037] The dust-containing gas enters the first box body 110 from the air inlet 111. Large-particle dust is separated and directly falls into the first box body 110. The remaining dust enters the filtration area of the filter bag part 140 in the second box body 120 along with the air flow. The filtered clean gas passes through the filter bag part 140 and is discharged through the extraction pipeline 220 arranged on one side of the third box body 130 and connected to the centrifugal blower 200.

[0038] Furthermore, a dust outlet 112 for discharging dust is opened at the lower end of the first box body 110. The first box body 110 is arranged in a funnel shape to facilitate the discharge of the collected dust.

[0039] Furthermore, a perforated plate 150 is fixedly installed at the connection of the first box body 110, the second box body 120, and the third box body 130 for separating the first box body 110, the second box body 120, and the third box body 130. The blowing unit 300 is arranged above the perforated plate 150. Installation slots are opened above the perforated plate 150 for installing the filter bag part 140 and can be used as an inspection platform for the filter bag part 140.

[0040] Furthermore, the filter bag part 140 includes a skeleton 142 fixedly installed at the lower end of the perforated plate 150 for support and a filter bag body 141 sleeved on the upper end of the skeleton 142 for filtering and adsorbing dust. Both ends of the filter bag body 141 are sleeved on the ends of the skeleton 142 and can be fixed by snap buttons or other means, which is convenient for installing and separating the filter bag body 141.

[0041] Further, a climbing frame 160 for facilitating maintenance personnel to climb for maintenance is fixedly installed on one side of the box body of the dust suction unit 100. A maintenance platform 161 for facilitating maintenance personnel to stand is fixedly installed on one side of the climbing frame 160. The blowing unit 300 extends to the installation part outside the box body of the dust suction unit 100 and is installed at the upper end of the maintenance platform 161, and a protective cover and a cover plate can be added to protect the internal parts, enabling the dust suction unit 100 to be set outdoors with a wider installation range.

[0042] The blowing unit 300 includes a blowing pipe 310 installed at the upper end of the flower plate 150 for blowing and cleaning the filter bag part 140, and an air pipeline 330 for connecting with the blowing pipe 310 to supply air. The blowing pipes 310 correspond to each group of filter bag parts 140 one by one, and the lower ends of the blowing pipes 310 are all connected to the air distribution header 320 one by one.

[0043] During the filtration operation, when the surface of the filter bag part 140 accumulates dust to a certain amount, the ash cleaning control device (timing, differential pressure, manual control) triggers the electromagnetic pulse valve 340 according to the set program and in sequence. The compressed air in the air distribution header 320 instantaneously sprays out through the holes of the punching short pipe 350 of the air pipeline 330 into the filter bag body 141. The filter bag body 141 expands sharply instantaneously, causing the dust accumulated on the surface of the filter bag body 141 to fall off. The filter bag body 141 is cleaned, and the removed dust falls into the first box body 110 and is discharged through the ash discharge valve. In this way, the dust accumulated on the filter bag body 141 is periodically pulsed and cleaned, enabling the purified gas to pass through normally and ensuring the operation of the dust removal system.

[0044] Further, an electromagnetic pulse valve 340 for controlling the air flow is installed at the bent part of the air pipeline 330. The lower end of the electromagnetic pulse valve 340 is connected to the air distribution header 320, which is used to control the opening time of the compressed air sprayed into the filter bag part 140.

[0045] Further, when the controller has no signal output, the exhaust hole of the electromagnetic pulse valve 340 is closed, and the blowing port of the electromagnetic pulse valve 340 is in a closed state. When the controller sends a signal, the exhaust hole of the electromagnetic pulse valve 340 is opened to discharge the gas in the back pressure chamber of the electromagnetic pulse valve 340, and the pressure decreases. The pressure difference generated on both sides of the diaphragm causes the diaphragm to displace and open the blowing port of the electromagnetic pulse valve 340. At this time, the compressed air passes through the electromagnetic pulse valve 340 from the air distribution header 320 and is sprayed into the filter bag body 141 through the blowing pipe 310, which is called the primary air. At the same time, several times the surrounding air of the primary air is induced, which is called the secondary air, causing an instantaneous positive pressure inside the filter bag body 141 to achieve ash cleaning. By adjusting the pulse period and pulse time of the electromagnetic pulse valve 340, the resistance of the negative pressure dust suction device can be kept within the limited range.

[0046] Furthermore, a closing nozzle 151 is fixedly installed inside the slot of the ceiling plate 150. While protecting the filter bag during blowing, it can prevent the backflush of dust inside the filter bag part 140.

[0047] Furthermore, a stamping short pipe 350 for blowing and cleaning the filter bag part 140 is correspondingly arranged at the upper end of the closing nozzle 151. It can maintain the orderliness of the pulsed air flow and protect the filter bag part 140 during blowing, avoiding an overly large blowing range that may affect the installation of the filter bag part 140 and result in poor cleaning effect.

[0048] Furthermore, a partition sheet 352 made of silicone material is movably installed at the lower end of the stamping short pipe 350. The partition sheet 352 is arranged with a cross-shaped opening. The outside of the partition sheet 352 is fixedly installed inside the inner side of the connecting ring 351. The connecting ring 351 is threadedly installed inside the lower end of the stamping short pipe 350, which is used to protect the lumen of the stamping short pipe 350 from dust entering and blocking the lumen. At the same time, the elastically arranged partition sheet 352 can open downward under the impact of air pressure to ensure the normal cleaning of the filter bag part 140.

[0049] Working principle of a negative pressure dust collection device: The dust-containing gas enters the first box body 110 from the air inlet 111. The large-particle dust is separated and directly falls into the first box body 110. The remaining dust enters the filter area of the filter bag part 140 in the second box body 120 along with the air flow. The filtered clean gas passes through the filter bag part 140 and is discharged through the air extraction pipeline 220 arranged on one side of the third box body 130 and connected to the centrifugal blower 200. As the filtering operation progresses, when the surface of the filter bag part 140 accumulates dust up to a certain amount, the dust cleaning control device (timing, differential pressure, manual control) triggers the electromagnetic pulse valve 340 according to the set program in sequence. The compressed air in the air distribution package 320 instantaneously sprays out from the holes of the stamping short pipe 350 of the air pipeline 330 through the electromagnetic pulse valve 340 and enters the filter bag body 141. The filter bag body 141 expands rapidly instantaneously, causing the dust accumulated on the surface of the filter bag body 141 to fall off. The filter bag body 141 is cleaned, and the removed dust falls into the first box body 110 and is discharged through the ash discharge valve. In this way, the dust accumulated on the filter bag body 141 is periodically pulse-cleaned, enabling the purified gas to pass through normally and ensuring the operation of the dust removal system.

[0050] It can be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A negative pressure dust suction device, characterized in that, Comprising: A dust suction unit, and a centrifugal blower installed on one side of the dust suction unit. The centrifugal blower is connected to the dust suction unit through an air extraction pipeline. A blowback unit is also arranged at the upper end of the dust suction unit; A dust suction unit, which includes a first box body, a second box body, and a third box body for supporting installation. The blowback unit is installed inside the third box body, and a filter bag part is installed inside the second box body; A blowback unit, which includes a blowback pipe and an air pipeline installed at the upper end of the flower plate. The blowback pipes respectively correspond to each group of filter bag parts one by one, and the lower ends of the blowback pipes are all connected to a distribution header one by one; An electromagnetic pulse valve is installed at the bent part of the air pipeline, and the lower end of the electromagnetic pulse valve is connected to the distribution header.

2. The negative pressure dust suction device according to claim 1, characterized in that, A dust outlet is opened at the lower end of the first box body, and the first box body is arranged in a funnel shape.

3. The negative pressure dust suction device according to claim 2, characterized in that, A flower plate is fixedly installed at the connection of the first box body, the second box body, and the third box body. The blowback unit is arranged at the upper end of the flower plate, and an installation notch is opened at the upper end of the flower plate.

4. The negative pressure dust suction device according to claim 3, characterized in that, The filter bag part includes a skeleton fixedly installed at the lower end of the flower plate and a filter bag body sleeved on the upper end of the skeleton. Both ends of the filter bag body are sleeved on the ends of the skeleton.

5. A negative pressure dust suction device according to claim 4, characterized in that, A climbing frame is fixedly installed on one side of the box body of the dust suction unit, and a maintenance platform is fixedly installed on one side of the climbing frame. The part of the blowback unit extending outside the box body of the dust suction unit is installed on the upper end of the maintenance platform.

6. A negative pressure dust suction device according to claim 5, characterized in that, A closing nozzle is fixedly installed inside the slot hole of the flower plate.

7. The negative pressure dust suction device according to claim 6, characterized in that, A stamping short pipe is correspondingly arranged at the upper end of the closing nozzle.

8. The negative pressure dust suction device according to claim 7, characterized in that, A partition made of silica gel material is movably installed at the lower end of the stamping short pipe. The outside of the partition is fixedly installed inside a connecting ring, and the connecting ring is threadedly installed inside the lower end of the stamping short pipe.

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