Environment-friendly waste gas treatment equipment

Abstract

The present application relates to waste gas treatment technical field, specifically to a kind of environmental protection type waste gas treatment equipment, including shell, inner core, helical guide vane and shunt mechanism;Inner core is horizontally arranged in shell;Helical guide vane is spirally arranged around inner core;Shell is filled with cleaning fluid, and liquid level height and the lower side of inner core are reserved with gap, waste gas flows along helical guide vane after passing through gap and carries part of cleaning fluid;Shunt mechanism has multiple, each shunt mechanism is correspondingly arranged between adjacent two turns of helical guide vane and above liquid level;Including multiple arc-shaped plates distributed along the radial direction of inner core and coaxial with the axis of inner core, multiple arc-shaped plates shunt waste gas, and increase the formation area of water film, improve the capture efficiency of fine particulate matter, shorten the moving distance of relatively fine dust, reduce dust escape probability.Multiple arc-shaped plates divide and rectify waste gas just passing through gap, so that airflow stably flows, improve the capture stability of dust in waste gas.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and specifically to an environmentally friendly waste gas treatment device. Background Technology

[0002] With the accelerating pace of industrialization, dust-laden exhaust gases emitted during production processes in industries such as chemical, metallurgical, power, and building materials have become a significant source of air pollution. How to efficiently and stably remove dust particles, especially fine particulate matter (such as PM2.5), from exhaust gases has become a critical issue urgently needing to be addressed in the field of air pollution control.

[0003] Wet scrubbing is one of the most widely used methods in industrial waste gas treatment. Its basic principle is to bring dust-laden gas into close contact with a liquid (usually water), utilizing the adsorption, dissolution, and condensation of the liquid droplets to separate dust particles from the gas phase and transfer them to the liquid phase. Compared to dry scrubbing, wet scrubbing has advantages such as the ability to simultaneously treat fine particulate matter and gaseous pollutants, and the capacity to handle high-temperature and high-humidity gases. Among various wet scrubbing devices, cyclone plate towers and water film scrubbers are commonly used due to their relatively simple structure and large gas throughput.

[0004] The horizontal cyclone water film dust collector is a flat-mounted dust removal device with a horizontally placed cylindrical outer shell and inner core. A spiral guide vane is installed between the outer shell and inner core. When dust-laden gas flows past a suitable water surface under a spiral ring, the water is pushed towards the inner wall of the outer shell by the airflow direction, forming a water film on the spiral ring. Dust-laden gas enters the shell, and dust particles that move to the outer shell under centrifugal force are removed by the water film. However, during gas flow, the water film only forms on the inner wall of the shell, resulting in limited dust removal efficiency. Furthermore, dust particles need to move to the water film on the inner wall of the shell to be captured. Some dust particles have a long settling path, making them difficult to remove in time and easily carried away by the airflow, thus affecting the dust removal efficiency. Summary of the Invention

[0005] This invention provides an environmentally friendly waste gas treatment device to solve the problem of dust easily escaping in existing water film dust removal devices.

[0006] The present invention provides an environmentally friendly waste gas treatment device using the following technical solution: An environmentally friendly waste gas treatment device includes a shell, an inner core, spiral guide vanes, and a diversion mechanism. The inner core is horizontally disposed within the shell, and the shell has an inlet and an outlet respectively located above the two ends of the inner core in the axial direction. The spiral guide vanes are spirally arranged around the inner core, with the inner and outer rings respectively fitting against the inner core and the shell. The shell is filled with cleaning fluid, and a gap is reserved between the liquid level and the lower side of the inner core. Waste gas enters from the inlet, passes through the gap, and flows along the spiral guide vanes, carrying some of the cleaning fluid. There are multiple diversion mechanisms, each corresponding to a position between two adjacent spiral guide vanes and above the liquid level. The diversion mechanism includes multiple arc-shaped plates that are radially spaced along the inner core and coaxial with the axis of the inner core. The multiple arc-shaped plates are fitted against the spiral guide vanes on both sides in the axial direction of the inner core. The length of the multiple arc-shaped plates increases from the direction closest to the inner core to the direction furthest from the inner core. One end of the multiple arc-shaped plates is flush with the inner core in the circumferential direction and is located in the cavity above the liquid level, near the side where the waste gas enters from the gap.

[0007] Optionally, the first end of the multiple arc-shaped plates is flush with the inner core circumferential direction, and the second end is the other end in the circumferential direction. The second end of the arc-shaped plate protrudes from the middle of the inner core axial direction and transitions smoothly from the two sides.

[0008] Optionally, each arc plate has a guide hole extending through both sides at its second end. The guide hole is inclined and is positioned from near the inner core to away from the inner core. The guide hole is inclined in the direction of the flow of exhaust gas in the cavity above the liquid surface.

[0009] Optionally, multiple arc-shaped plates of each diversion mechanism are distributed at equal intervals between the inner core and the inner wall of the housing.

[0010] Optionally, each two adjacent turns of the spiral guide vane define a processing chamber between itself and the inner wall of the housing. Multiple processing chambers are distributed along the inner core axis. At least one processing chamber near the air outlet is not filled with cleaning fluid and is not equipped with a diversion mechanism. The other processing chambers are filled with the cleaning fluid and are equipped with a diversion mechanism. The cleaning fluid in two adjacent processing chambers is separated by the spiral guide vane. Multiple mortar hoppers are provided at the bottom of the housing. Each mortar hopper is located below a processing chamber and communicates with the corresponding processing chamber.

[0011] Optionally, multiple mortar hoppers connected to the treatment chamber filled with cleaning fluid are connected to the same pipe below, and a drain valve is provided on the pipe; a drain valve is provided below the mortar hopper connected to the treatment chamber not filled with cleaning fluid.

[0012] Optionally, the cross-section of the inner core is inverted pear shape, and the air inlet is vertically set and located on one side of the inner core. After the exhaust gas enters the shell from top to bottom, it flows downward from the side of the inner core, passes through the gap between the lower side of the inner core and the liquid surface, and then flows along the spiral guide vane.

[0013] Optionally, the housing is provided with an air outlet chamber, which is connected to the treatment chamber that is not filled with cleaning fluid and is located above the spiral guide vane. The air outlet is vertically arranged and higher than the spiral guide vane, and the air outlet is located at the top of the air outlet chamber.

[0014] Optionally, the air outlet chamber of the shell is provided with multiple eaves, which are arranged alternately.

[0015] Optionally, the portion of the housing located outside the inner core and the helical guide vanes has the same shape as the inner core.

[0016] The beneficial effects of the present invention are: the environmentally friendly waste gas treatment equipment of the present invention, by setting multiple arc plates, diverts the waste gas and increases the formation area of ​​the water film, thereby improving the collection efficiency of fine particulate matter, shortening the movement path of finer dust, and reducing the probability of dust escape.

[0017] Furthermore, by positioning one end of multiple arc-shaped plates on the rising side of the airflow, the exhaust gas that has just passed through the gap is divided and rectified, so that the airflow flows stably, reducing the attenuation of flow velocity caused by airflow turbulence, and improving the stability of dust collection in the exhaust gas.

[0018] Furthermore, the airflow inside the arc-shaped plate captures impurities through the water film on the inner wall of the arc-shaped plate, and moves along the arc-shaped plate under the drive of the airflow, flowing through the guide holes to the inner wall of the adjacent arc-shaped plate. Impurities on the inner wall of each arc-shaped plate converge towards the second end under the drive of the airflow and move towards the outer arc-shaped plate through the guide holes, and finally flow to the inner wall of the shell through the guide holes on the outermost arc-shaped plate. This allows impurities to converge into larger particles and slide down along the inner wall of the shell, improving the capture efficiency of impurities and preventing impurities from being carried away by the airflow again during the falling process due to their small size. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the environmentally friendly waste gas treatment equipment of the present invention; Figure 2 This is a side view of the overall structure of an embodiment of the environmentally friendly waste gas treatment equipment of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction; Figure 4This is a schematic diagram of the structure of the inner core, spiral guide vane, and diversion mechanism in an embodiment of the environmentally friendly waste gas treatment equipment of the present invention; Figure 5 for Figure 4 A diagram illustrating the breakdown of the middle structure; Figure 6 for Figure 4 A front view of the structure; Figure 7 for Figure 6 Schematic diagram of cross section along the BB direction; Figure 8 for Figure 7 Enlarged view of point X in the middle; Figure 9 This is a schematic diagram of the arc-shaped plate in an embodiment of the environmentally friendly waste gas treatment equipment of the present invention.

[0021] In the diagram: 100, shell; 110, air inlet; 120, air outlet; 130, mortar hopper; 140, drain valve; 150, drain valve; 160, eaves; 200, inner core; 300, spiral guide vane; 400, flow divider; 410, arc plate; 411, guide hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] An embodiment of an environmentally friendly waste gas treatment device of the present invention, such as... Figures 1 to 9 As shown, it includes a housing 100, an inner core 200, a spiral guide vane 300, and a flow splitting mechanism 400.

[0024] The inner core 200 is horizontally disposed inside the housing 100, and the housing 100 is provided with an air inlet 110 and an air outlet 120 above the two ends of the inner core 200 in the axial direction.

[0025] The spiral guide vane 300 is spirally arranged around the inner core 200, and the inner and outer rings are respectively attached to the outer wall of the inner core 200 and the inner wall of the shell 100; specifically, the spiral guide vane 300 can be fixedly connected to the inner core 200.

[0026] The housing 100 is filled with cleaning fluid, and a gap is reserved between the fluid level and the lower side of the inner core 200 for the passage of exhaust gas. Water is the commonly used cleaning fluid.

[0027] There are multiple diversion mechanisms 400, each of which is correspondingly arranged between two adjacent turns of the spiral guide vane 300 and above the liquid surface. The diversion mechanism 400 includes multiple arc-shaped plates 410 that are radially spaced along the inner core 200 and coaxial with the axis of the inner core 200. The multiple arc-shaped plates 410 are respectively attached to the spiral guide vane 300 on both sides of the inner core 200 in the axial direction. From the direction close to the inner core 200 to the direction away from the inner core 200, the length of the multiple arc-shaped plates 410 in the circumferential direction of the inner core 200 increases. The ends of the multiple arc-shaped plates 410 in the circumferential direction of the inner core 200 are flush and located on the side of the cavity above the liquid surface near where the exhaust gas enters from the gap.

[0028] Exhaust gas enters through inlet 110. As it passes through the gap between the inner core 200 and the liquid surface, it pushes some of the cleaning liquid towards the inner walls of the multiple arc-shaped plates 410 near the inner core 200 and the inner wall of the shell 100, thus forming a continuous water film on the arc-shaped plates 410 and the inner wall of the shell 100. Dust-laden exhaust gas enters the shell 100, where centrifugal force causes dust particles displaced to the outside to be removed by the water film on the arc-shaped plates 410 and the inner wall of the shell 100. Additionally, each impact of the airflow on the liquid surface also cleans and removes dust. Finer dust particles are captured and condensed by the water mist and splashes generated by the repeated impacts of the airflow on the liquid surface, accelerating their movement towards the arc-shaped plates 410 and the inner wall of the shell 100, ultimately being removed by the water film. By setting multiple arc-shaped plates 410, the exhaust gas is diverted, and the area for water film formation is increased, improving the collection efficiency of fine particles, shortening the travel distance of finer dust particles, and reducing the probability of dust escape.

[0029] Furthermore, since the water film formed on the inner wall of the shell 100 when the exhaust gas rises after passing through the gap is relatively turbulent, that is, the airflow on the rising side is relatively turbulent, by placing one end of the multiple arc plates 410 on the rising side of the airflow, the exhaust gas that has just passed through the gap is divided and rectified, so that the airflow flows stably, reducing the attenuation of the flow velocity caused by the turbulence of the airflow, and improving the stability of dust collection in the exhaust gas.

[0030] The length of the multiple arc-shaped plates 410 increases in the circumferential direction of the inner core 200, which causes the layered airflow to converge from the inside to the outside in sequence, forming a more uniform flow field distribution, reducing the generation of turbulence, and thus reducing the influence of the multiple arc-shaped plates 410 on the airflow velocity.

[0031] In this embodiment, the ends of the multiple arc-shaped plates 410 that are flush with the inner core 200 in the circumferential direction are designated as first ends, and the other ends in the circumferential direction are designated as second ends. The second ends of the arc-shaped plates 410 protrude smoothly from the middle of the inner core 200 in the axial direction compared to the two sides. Specifically, the second ends of the arc-shaped plates 410 can be triangular structures or arc-shaped structures with a protruding center. This arrangement allows the airflow flowing from the inside of the arc-shaped plates 410 to gradually merge with the airflow from the outside of the arc-shaped plates 410 in the axial direction of the inner core 200 from both ends towards the middle, further improving the gradual effect of airflow merging and further ensuring the stability of the airflow.

[0032] In this embodiment, each arc-shaped plate 410 has a guide hole 411 extending through both sides at its second end. The guide hole 411 is inclined and located from near to away from the inner core 200. The guide hole 411 is inclined along the direction of the flow of exhaust gas in the cavity above the liquid surface. The airflow inside the arc-shaped plate 410 passes through impurities captured by the water film on the inner wall of the arc-shaped plate 410. Driven by the airflow, the impurities move along the arc-shaped plate 410 and flow through the guide hole 411 to the inner wall of the adjacent arc-shaped plate 410. The impurities on the inner wall of each arc-shaped plate 410 converge towards the second end under the drive of the airflow and move towards the outer arc-shaped plate 410 through the guide hole 411. Finally, they flow through the guide hole 411 on the outermost arc-shaped plate 410 to the inner wall of the shell 100. This allows the impurities to converge into larger particles and slide down the inner wall of the shell 100, improving the capture efficiency of impurities and preventing impurities that are too small from being carried away by the airflow again during the fall.

[0033] In this embodiment, the multiple arc-shaped plates 410 of each diversion mechanism 400 are distributed at equal intervals between the inner core 200 and the inner wall of the housing 100, so that the airflow is uniformly stratified.

[0034] In this embodiment, each two adjacent turns of the spiral guide vane 300 define a processing chamber between itself and the inner wall of the housing 100. Multiple processing chambers are distributed axially along the inner core 200. At least one processing chamber near the outlet 120 is not filled with cleaning fluid and is not equipped with a diversion mechanism 400. The other processing chambers are filled with the cleaning fluid and are equipped with diversion mechanisms 400. The cleaning fluid in adjacent processing chambers is separated by the spiral guide vane 300. Multiple slurry hoppers 130 are provided at the bottom of the housing 100. Each slurry hopper 130 is located below a processing chamber and communicates with the corresponding processing chamber. The exhaust gas first passes through multiple processing chambers filled with cleaning fluid to complete dust removal and purification before entering a processing chamber not filled with cleaning fluid for drying, reducing the amount of water vapor discharged with the purified gas.

[0035] In this embodiment, multiple mortar hoppers 130 connected to the treatment chamber filled with cleaning fluid are connected to the same pipe below, and a drain valve 140 is provided on the pipe; a drain valve 150 is provided below the mortar hopper 130 connected to the treatment chamber not filled with cleaning fluid.

[0036] In this embodiment, the inner core 200 has an inverted pear-shaped cross-section, and the air inlet 110 is vertically arranged and located on one side of the inner core 200. After the exhaust gas enters the housing 100 from top to bottom, it flows downward from the side of the inner core 200 through the gap between the lower side of the inner core 200 and the liquid surface, and then flows along the spiral guide vane 300. The inverted pear-shaped inner core 200 can reduce the resistance of the exhaust gas flowing downward through the gap and improve the airflow efficiency.

[0037] In this embodiment, an air outlet chamber is provided inside the housing 100. The air outlet chamber is connected to the treatment chamber that is not filled with cleaning fluid and is located above the spiral guide vane 300. The air outlet 120 is vertically arranged and higher than the spiral guide vane 300, and is located at the top of the air outlet chamber. Multiple eaves 160 are provided inside the air outlet chamber of the housing 100. The multiple eaves 160 are staggered to intercept a small amount of water mist and tiny water droplets carried out by the airflow.

[0038] In this embodiment, the portion of the housing 100 located outside the inner core 200 and the spiral guide vane 300 has the same shape as the inner core 200, which makes the airflow between the inner core 200 and the housing 100 more closely and smoothly, reducing the generation of local eddies.

[0039] In the operation of this environmentally friendly waste gas treatment device, waste gas enters the first treatment chamber through the inlet 110. As it passes through the gap between the inner core 200 and the liquid surface, some of the cleaning liquid is pushed towards the inner walls of the multiple arc-shaped plates 410 near the inner core 200 and the inner wall of the shell 100, thus forming a continuous water film on the arc-shaped plates 410 and the inner wall of the shell 100. Dust-laden waste gas enters the shell 100, and centrifugal force causes dust particles displaced to the outside to be removed by the water film on the arc-shaped plates 410 and the inner wall of the shell 100. Furthermore, each impact of the airflow on the liquid surface also has a cleaning and dust removal effect; finer dust particles are captured and condensed by the water mist and splashes generated by the repeated impacts of the airflow on the liquid surface, accelerating their movement towards the arc-shaped plates 410 and the inner wall of the shell 100, and ultimately being removed by the water film. By setting multiple arc-shaped plates 410, the waste gas is diverted, and the area for water film formation is increased, improving the collection efficiency of fine particles, shortening the movement distance of finer dust particles, and reducing the probability of dust escape. After being diverted by multiple arc-shaped plates 410, the exhaust gas continues to flow and converges above the liquid surface in the treatment chamber. It then continues flowing along the spiral guide vanes 300, entering the next treatment chamber through the gap between the inner core 200 and the liquid surface. This dust removal process is repeated, with impurities in the exhaust gas being intercepted layer by layer. After adhering to the water film, the impurities fall into the cleaning liquid and settle in the slurry hopper 130. When the gas enters the last treatment chamber, which does not contain cleaning liquid, it is only used for drying. A small amount of water vapor carried by the gas partially settles naturally during the flow, while some is intercepted by the multiple eaves 160 in the outlet chamber. Finally, the treated exhaust gas is discharged from the outlet 120.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmentally friendly waste gas treatment device, characterized in that, Includes a housing, inner core, spiral guide vanes, and flow splitting mechanism; The inner core is horizontally positioned inside the housing, and the housing has an air inlet and an air outlet respectively located above the two ends of the inner core in the axial direction. The spiral guide vane is spirally arranged around the inner core, and the inner and outer rings are respectively attached to the inner core and the shell. The shell is filled with cleaning fluid, and a gap is reserved between the liquid level and the lower side of the inner core. Exhaust gas enters from the air inlet, passes through the gap, and flows along the spiral guide vane, carrying some of the cleaning fluid. There are multiple diversion mechanisms, each positioned between two adjacent spiral guide vanes and above the liquid surface. Each diversion mechanism includes multiple arc-shaped plates that are radially spaced along the inner core and coaxial with the axis of the inner core. The arc-shaped plates are respectively attached to the spiral guide vanes on both sides of the inner core in the axial direction. The length of the multiple arc-shaped plates increases in the circumferential direction of the inner core from the direction closer to the inner core to the direction farther away from the inner core. One end of the multiple arc-shaped plates is flush with the inner core in the circumferential direction and is located on the side of the cavity above the liquid surface near where the exhaust gas enters from the gap.

2. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, The first end of the multiple arc-shaped plates is flush with the inner core circumferential direction, and the second end is the other end in the circumferential direction. The second end of the arc-shaped plate protrudes from the middle of the inner core axis and transitions smoothly from the two sides.

3. The environmentally friendly waste gas treatment equipment according to claim 2, characterized in that, Each arc plate has a guide hole at its second end that runs through both sides. The guide hole is inclined and is positioned from near the inner core to away from the inner core. The guide hole is inclined in the direction of the flow of exhaust gas in the cavity above the liquid surface.

4. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, Multiple arc-shaped plates of each diversion mechanism are distributed at equal intervals between the inner core and the inner wall of the shell.

5. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, Each two adjacent spiral guide vanes define a processing chamber between themselves and the inner wall of the housing. Multiple processing chambers are distributed along the inner core axis. At least one processing chamber near the air outlet is not filled with cleaning fluid and is not equipped with a diversion mechanism. The other processing chambers are filled with the cleaning fluid and are equipped with a diversion mechanism. The cleaning fluid in two adjacent processing chambers is separated by the spiral guide vanes. Multiple mortar hoppers are provided at the bottom of the housing. Each mortar hopper is located below a processing chamber and communicates with the corresponding processing chamber.

6. The environmentally friendly waste gas treatment equipment according to claim 5, characterized in that, Multiple mortar hoppers connected to the treatment chamber filled with cleaning fluid are connected to the same pipe, and a drain valve is installed on the pipe; a drain valve is installed below the mortar hopper connected to the treatment chamber that is not filled with cleaning fluid.

7. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, The cross-section of the inner core is inverted pear shape, and the air inlet is vertically set and located on one side of the inner core. After the exhaust gas enters the shell from top to bottom, it flows downward from the side of the inner core, passes through the gap between the lower side of the inner core and the liquid surface, and then flows along the spiral guide vane.

8. The environmentally friendly waste gas treatment equipment according to claim 5, characterized in that, The housing is provided with an air outlet chamber, which is connected to the treatment chamber that is not filled with cleaning fluid and is located above the spiral guide vane. The air outlet is vertically set and is higher than the spiral guide vane. The air outlet is located at the top of the air outlet chamber.

9. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, The air outlet chamber of the shell is equipped with multiple eaves, which are arranged in an alternating manner.

10. The environmentally friendly waste gas treatment equipment according to claim 1, characterized in that, The portion of the shell located outside the inner core and the spiral guide vanes has the same shape as the inner core.

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