Foam centrifugal dust collector and waste gas treatment system

Abstract

The present invention relates to the technical field of waste gas treatment, and provides a foam centrifugal dust collector and a waste gas treatment system. The foam centrifugal dust collector includes a housing. A first air inlet is provided at the upper part of the housing. At least one foam mixer is provided in the upper part of the housing. A dust collection bin communicating with the internal space of the housing is provided at the bottom of the housing. An air outlet communicating with the internal space of the housing is provided at the top of the housing. The foam mixer has a second air inlet, a foam inlet and an air-dust mixture outlet. The second air inlet is communicated with the first air inlet. The second air inlet is provided on the side wall of the foam mixer, and its air inlet direction is tangent to the side wall of the foam mixer. The foam inlet is provided at the top of the foam mixer. The air-dust mixture outlet is provided at the bottom of the foam mixer and communicated with the internal space of the housing. The waste gas treatment system includes the above-mentioned foam centrifugal dust collector. The foam centrifugal dust collector and the waste gas treatment system have good dust removal effect and low energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular, to a foam centrifugal dust collector and a waste gas treatment system. Background Art

[0002] The foam control air pollution technology mainly controls dust by means of foam. A certain amount of additives are added to water, and gas is introduced through a special foaming device to generate high-magnification foam, which is sprayed onto the dust source. The good covering, wetting and adhesion effects act on the dust, fundamentally preventing the diffusion of dust and effectively reducing the dust concentration in the air. Compared with other wet dust control methods, the water consumption of this technology can be reduced by 30-80%, and the dust control efficiency is 3-5 times higher than that of spray watering.

[0003] In the existing foam dust collectors, the generated foam is simply mixed with the dust-containing gas to capture the particulate matter in the dust-containing gas for dust removal purposes. Due to the limitation of the structural design, the dust removal efficiency needs to be improved or the energy consumption needs to be reduced.

[0004] In view of this, the present application is specifically proposed. Summary of the Invention

[0005] A foam centrifugal dust collector provided by the present invention has a structure different from that of the existing foam dust collectors, which can save energy consumption and improve the dust removal efficiency.

[0006] A waste gas treatment system provided by the present invention aims to reduce the energy consumption of the existing waste gas treatment system and improve the waste gas treatment efficiency.

[0007] The embodiments of the present invention are implemented as follows:

[0008] In a first aspect, an embodiment provides a foam centrifugal dust collector, including a housing. A first air inlet is provided at the upper part of the housing. At least one foam mixer is provided in the upper part of the housing. A dust collection bin communicating with the internal space of the housing is provided at the bottom of the housing. An air outlet communicating with the internal space of the housing is provided at the top of the housing;

[0009] The foam mixer has a second air inlet, a foam inlet and a gas-dust mixture outlet. The second air inlet is communicated with the first air inlet, and the second air inlet is arranged on the side wall of the foam mixer for introducing the dust-containing gas into the foam mixer and making the dust-containing gas perform a swirling motion in the foam mixer. The foam inlet is arranged at the top of the foam mixer, and the gas-dust mixture outlet is arranged at the bottom of the foam mixer and communicated with the internal space of the housing.

[0010] In an optional embodiment, a collision plate is further provided in the housing. The collision plate is located above the dust collection bin. The collision plate is in a funnel shape, and a solid particle outlet is provided in the middle. The solid particle outlet is communicated with the dust collection bin.

[0011] In an alternative embodiment, the cross-section of the housing in a plane perpendicular to the side wall of the foam mixer is circular, the air outlet is located at the middle position of the top of the housing, the bottom of the foam mixer has a gas-dust mixture discharge pipe, the gas-dust mixture outlet is arranged on the gas-dust mixture discharge pipe, and the gas-dust mixture discharge pipe is wedge-shaped to enable the gas-dust mixture to be discharged from the gas-dust mixture outlet, collide with the collision plate, and then perform a swirling motion in the housing.

[0012] In an alternative embodiment, the number of foam mixers is multiple, and multiple gas-dust mixture outlets are arranged along the same circumferential direction to enable the gas-dust mixture discharged from the multiple foam mixers to perform a swirling motion along the same circumferential direction.

[0013] In an alternative embodiment, an inlet static pressure box is arranged in the upper part of the housing. The top of the inlet static pressure box is communicated with the first air inlet, and the side wall of the inlet static pressure box is provided with gas transfer pipes equal in number to the foam mixers. One end of each gas transfer pipe is communicated with the inlet static pressure box, and the other end is communicated with the second air inlet of the corresponding foam mixer.

[0014] In an alternative embodiment, the foam mixture further includes a gas discharge pipe. The upper end of the gas discharge pipe is the air outlet, and the lower end of the gas discharge pipe passes through the inlet static pressure box and extends to the upper part of the gas-dust mixture outlet.

[0015] In an alternative embodiment, the foam inlet is located at the middle position of the top of the foam mixer.

[0016] In an alternative embodiment, the lower part of the housing is funnel-shaped.

[0017] In an alternative embodiment, the dust collection bin can be detachably connected to the housing.

[0018] In a second aspect, the embodiment provides an exhaust gas treatment system, including the foam centrifugal dust collector according to any one of the above embodiments.

[0019] The beneficial effects of the embodiments of the present invention are:

[0020] The foam centrifugal dust collector provided by the present invention through the above design has dust-containing gas entering the foam centrifugal dust collector from the first air inlet, and then entering the foam mixer along the tangential direction of the side wall of the foam mixer through the second air inlet. The dust-containing gas makes a rotational centrifugal motion in the foam mixer, causing a micro-negative pressure to form in the middle of the foam mixer. Under the action of the micro-negative pressure, the dust-removing foam enters the foam mixer from an external device through the foam inlet. The foam mixes with the dust-containing gas in the foam mixer, and the foam captures pollutant particles, causing the pollutant particles to continuously collide and increase in size. The pollutant particles are separated from the gas under the action of centrifugal force, and finally slide down along the wall of the device and flow out from the gas outlet of the foam mixer with the air flow. The particles sink under the action of gravity and enter the dust collection bin, while the treated gas is extracted from the air outlet at the upper part of the device.

[0021] Due to the specific setting of the foam mixer in the shell, the foam centrifugal dust collector saves energy consumption, has good dust removal effect, uses less water for dust removal during use, and can reduce the discharge of waste water in the waste gas treatment process.

[0022] The waste gas treatment system provided by the present invention through the above design includes the foam centrifugal dust collector provided by the present invention, so the waste gas treatment system has low energy consumption and good treatment effect. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. 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 be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of the foam centrifugal dust collector provided by the embodiment of the present invention from the first perspective;

[0025] Figure 2 For Figure 1 Cross-sectional view at D-D in

[0026] Figure 3 Structural schematic diagram of the foam centrifugal dust collector provided by the embodiment of the present invention from the second perspective;

[0027] Figure 4 Structural schematic diagram of the foam centrifugal dust collector provided by the embodiment of the present invention from the third perspective;

[0028] Figure 5 Structural schematic diagram of the internal structure of the shell of the foam centrifugal dust collector provided by the embodiment of the present invention from the fourth perspective;

[0029] Figure 6This is a schematic structural diagram of the internal structure of the foam centrifugal dust collector housing provided by the embodiment of the present invention from the fifth perspective.

[0030] Icon: 100 - foam centrifugal dust collector; 110 - housing; 111 - first air inlet; 112 - air outlet; 120 - foam mixer; 121 - second air inlet; 122 - air-dust mixture outlet; 123 - air-dust mixture discharge pipe; 124 - foam inlet; 130 - dust collection bin; 140 - collision plate; 141 - solid particle outlet; 150 - inlet static pressure box; 151 - gas transfer pipe; 160 - gas discharge pipe. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0033] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] Please refer to Figures 1 to 4 , this embodiment provides a foam centrifugal dust collector 100, which includes a housing 110. A first air inlet 111 is arranged at the upper part of the housing 110. At least one foam mixer 120 is arranged in the upper part of the housing 110. A dust collection bin 130 communicating with the internal space of the housing 110 is arranged at the bottom of the housing 110. An air outlet 112 communicating with the internal space of the housing 110 is arranged at the top of the housing 110.

[0038] The foam mixer 120 has a second air inlet 121, a foam inlet 124, and an air-dust mixture outlet 122. The second air inlet 121 is communicated with the first air inlet 111. The second air inlet 121 is arranged on the side wall of the foam mixer 120 for introducing dust-containing gas into the foam mixer 120 and making the dust-containing gas perform a swirling motion in the foam mixer 120. The foam inlet 124 is arranged at the top of the foam mixer 120. The air-dust mixture outlet 122 is arranged at the bottom of the foam mixer 120 and communicated with the internal space of the housing 110.

[0039] During use, the dust-containing gas enters the foam centrifugal dust collector 100 from the first air inlet 111, and then enters the foam mixer 120 tangentially along the side wall of the second air inlet 121. The dust-containing gas performs a rotational centrifugal motion in the foam mixer 120, causing a micro-negative pressure to be formed in the middle of the foam mixer 120. Under the action of the micro-negative pressure, the dust removal foam enters the foam mixer 120 from an external device through the foam inlet 124. The foam is mixed with the dust-containing gas in the foam mixer. The foam captures pollutant particles, causing the pollutant particles to continuously collide and increase in size. The pollutant particles are separated from the gas under the action of centrifugal force and finally slide down along the wall of the device and flow out from the air-dust mixture outlet 122 of the foam mixer with the air flow. The particles sink under the action of gravity and enter the dust collection bin 130. An air extraction pump is externally connected to the air outlet 112 to extract the treated gas from the air outlet 112 at the upper part of the device, so as to achieve the effect of dust removal of the dust-containing gas.

[0040] Under normal circumstances, in order to make the dusty gas perform a swirling motion in the foam mixer 120, the side wall of the foam mixer 120 is generally set to be cylindrical, and the intake direction of the second intake port 121 is set to be substantially tangent to the side wall of the foam mixer 120, so as to ensure that the dusty gas performs a swirling centrifugal motion after entering the foam mixer 120.

[0041] The structure of this dust collector is different from that of the existing foam dust collectors. It has the characteristics of energy saving and good dust removal effect. When in use, the water consumption for foam dust removal is small, so no wastewater or little wastewater is generated during the use process, thus making the dust removal cost low.

[0042] Preferably, the foam component commonly used is an organic substance. According to the principle of similar compatibility, this type of foam can also capture organic pollutants in the dusty gas.

[0043] Furthermore, a collision plate 140 is also provided in the housing 110. The collision plate 140 is located above the dust collection bin 130. The collision plate 140 is funnel-shaped, and a solid particle outlet 141 is provided in the middle. The solid particle outlet 141 is communicated with the dust collection bin 130.

[0044] The setting of the collision plate 140 enables the gas-dust mixture discharged from the foam mixer 120 to collide with the collision plate 140 after discharging from the foam mixer 120, thereby changing the air flow direction to prevent the air flow from rushing into the dust collection bin 130, and further making the particles grow during the collision so as to be separated from the air flow.

[0045] Therefore, the setting of the collision plate 140 can further improve the dust removal effect and accelerate the separation of solid particles from the gas.

[0046] Furthermore, please refer to Figure 5 and Figure 6 , the cross-section of the housing 110 in the plane perpendicular to the side wall of the foam mixer 120 is circular. The air outlet 112 is located at the middle position of the top of the housing 110. The bottom of the foam mixer 120 has a gas-dust mixture discharge pipe 123. The gas-dust mixture outlet 122 is arranged on the gas-dust mixture discharge pipe 123. The gas-dust mixture discharge pipe 123 is wedge-shaped for discharging the gas-dust mixture from the gas-dust mixture outlet 122 to collide with the collision plate 140 and then perform a swirling motion in the housing 110.

[0047] The wedge-shaped setting of the gas-dust mixture discharge pipe 123 causes the gas-dust mixture discharged from the foam mixer 120 to collide with the collision plate 140 at an inclined downward angle, thereby changing the flow angle of the air flow, so that the air flow basically makes a swirling motion in the horizontal direction. Under the action of the collision plate, the solid particles carried in the air flow move along the collision plate 140 towards the central position. At the same time, since the external pump of the device is connected to the air outlet 112, an upward suction effect is generated in the central space. Under the parallel action of the upward suction effect and the gas flowing out of the mixer, an upward rotational motion is generated in the central position of the collision plate. Some pollutant particles are separated again and move towards the outer wall of the device, collide with the gas coming out of the mixer, and then collide with the collision plate 140 again as the gas moves downward, and fall into the dust collection bin 130 through the central round hole of the collision plate 140. The separated gas is pumped out from the gas discharge pipe 160 to achieve a better dust removal purpose.

[0048] Preferably, the number of foam mixers 120 is multiple, and the multiple gas-dust mixture outlets 122 are arranged along the same circumferential direction, so that the gas-dust mixtures discharged from the multiple foam mixers 120 all make a swirling motion along the same circumferential direction.

[0049] Multiple foam mixers 120 can increase the dust removal efficiency, and the arrangement of multiple gas-dust mixture outlets 122 along the same circumferential direction can make the running directions of the gases carrying solid particles discharged from each gas-dust mixture outlet 122 along the same circumferential direction, so that the gas-dust mixtures discharged from the multiple foam mixers 120 make an orderly rotational centrifugal motion in the housing 110 to further improve the dust removal efficiency.

[0050] Furthermore, an inlet static pressure box 150 is provided in the upper part of the housing 110. The top of the inlet static pressure box 150 is connected to the first air inlet 111, and the side wall of the inlet static pressure box 150 is provided with gas transfer pipes 151 equal in number to the foam mixers 120. One end of each gas transfer pipe 151 is connected to the inlet static pressure box 150, and the other end is connected to the second air inlet 121 of the corresponding foam mixer 120.

[0051] The externally connected dusty gas first enters the inlet static pressure box 150 through the first air inlet 111, and then enters each foam mixer 120 through the first transfer pipe 151 after being buffered by the inlet static pressure box 150. Such a setting can make the air flow of the dusty gas entering the foam mixer 120 relatively stable and ensure the dust removal effect.

[0052] Specifically, in this embodiment, the number of foam mixers 120 is 4, and the 4 foam mixers are evenly distributed in the inlet static pressure box 150.

[0053] It should be noted that in other embodiments of the present invention, the number of foam mixers 120 may also be 1 - 3 or more than 4. Generally, the set number should ensure the dust removal efficiency and should not be too small, as too small may result in low dust removal efficiency.

[0054] Preferably, the foam inlet 124 is located at the middle position of the top of the corresponding foam mixer 120. Then the foam enters from the middle of the foam mixer 120, and can be more evenly mixed with the dust - containing gas.

[0055] Furthermore, the foam mixer 120 further includes a gas discharge pipe 160. The upper end of the gas discharge pipe 160 is an air outlet 112, and the lower end of the gas discharge pipe 160 passes through the inlet static pressure box 150 and extends to the upper part of the gas - dust mixture outlet 122.

[0056] The gas discharge pipe 160 discharges the dedusted gas from inside the housing 110 to the outside of the housing 110. In this embodiment, the gas discharge pipe 160 extends out from the middle of the first air inlet 111.

[0057] Furthermore, the lower part of the housing 110 is funnel - shaped, and the position of the housing 110 corresponding to the bottom of the funnel is connected to the dust collection bin 130.

[0058] The design of the lower part of the housing 110 being funnel - shaped is mainly to facilitate the sliding of solid particles along the inclined plane into the dust collection bin, which is convenient for the collection of solid particles.

[0059] Preferably, for convenient regular dust cleaning, the dust collection bin 130 is detachably connected to the housing 110.

[0060] In summary, for the foam centrifugal dust collector provided by the present invention, due to the specific setting of the foam mixer in the housing, the foam centrifugal dust collector saves energy, has a good dust removal effect, uses less water for foam dust removal during use, and can reduce the discharge of wastewater during the waste gas treatment process.

[0061] Furthermore, the specific settings of the gas - dust mixture outlet, the inlet static pressure box, the collision plate, etc. can all improve the dust removal effect.

[0062] The present invention also provides an exhaust gas treatment system, including the foam centrifugal dust collector provided by the present invention. Therefore, this exhaust gas treatment system has low energy consumption and good exhaust gas treatment effect.

[0063] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A foam centrifugal dust collector, characterized in that, It includes a housing. A first air inlet is provided at the upper part of the housing. At least one foam mixer is provided in the upper part of the housing. A dust collection bin communicating with the internal space of the housing is provided at the bottom of the housing. An air outlet communicating with the internal space of the housing is provided at the top of the housing. The foam mixer has a second air inlet, a foam inlet and an air-dust mixture outlet. The second air inlet is communicated with the first air inlet. The second air inlet is arranged on the side wall of the foam mixer for introducing dust-containing gas into the foam mixer and making the dust-containing gas perform a swirling motion in the foam mixer. The foam inlet is arranged at the top of the foam mixer. The air-dust mixture outlet is arranged at the bottom of the foam mixer and communicated with the internal space of the housing. A collision plate is further provided in the housing. The collision plate is located above the dust collection bin. The collision plate is funnel-shaped and has a solid particle outlet in the middle. The solid particle outlet is communicated with the dust collection bin. The number of the foam mixers is multiple. The multiple air-dust mixture outlets are arranged along the same circumferential direction for making the air-dust mixtures discharged from the multiple foam mixers all perform a swirling motion along the same circumferential direction. An inlet static pressure box is provided in the upper part of the housing. The top of the inlet static pressure box is communicated with the first air inlet. The side wall of the inlet static pressure box is provided with gas transfer pipes equal in number to the foam mixers. One end of each gas transfer pipe is communicated with the inlet static pressure box, and the other end is communicated with the second air inlet of the corresponding foam mixer.

2. The foam centrifugal dust collector according to claim 1, wherein The cross-section of the housing in a plane perpendicular to the side wall of the foam mixer is circular. The air outlet is located at the middle position of the top of the housing. The bottom of the foam mixer has an air-dust mixture discharge pipe. The air-dust mixture outlet is arranged on the air-dust mixture discharge pipe. The air-dust mixture discharge pipe is wedge-shaped for making the air-dust mixture discharged from the air-dust mixture outlet collide with the collision plate and perform a swirling motion in the housing.

3. The foam centrifugal dust collector according to claim 1, characterized in that, The foam mixer further includes a gas discharge pipe. The upper end of the gas discharge pipe is the air outlet. The lower end of the gas discharge pipe passes through the inlet static pressure box and extends to the upper part of the air-dust mixture outlet.

4. The foam centrifugal dust collector according to claim 1, wherein It is characterized in that The foam inlet is located at the middle position of the top of the foam mixer.

5. The foam centrifugal dust collector according to claim 1, characterized in that The lower part of the housing is funnel-shaped. The position of the housing corresponding to the bottom of the funnel is connected with the dust collection bin.

6. The foam centrifugal dust collector according to claim 1, characterized in that, The dust collection bin is detachably connected to the housing.

7. An exhaust gas treatment system, characterized in that, It includes the foam centrifugal dust collector according to any one of claims 1 to 6.

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