A Venturi scrubbing dust collector

Abstract

This utility model discloses a Venturi scrubbing dust collector, comprising: a gas inlet, a liquid inlet, a gas-liquid outlet, a constriction section, a throat, a diffuser, and an airflow regulating device; the gas inlet includes a first inlet pipe and a gas inlet cavity; the first inlet pipe is connected to an upstream device to allow gas from the upstream device to enter the scrubbing dust collector; the upper end of the gas inlet cavity is connected to the first inlet pipe, and the lower end is connected to the upper end of the constriction section; the throat is disposed between the constriction section and the diffuser; the end of the diffuser is connected to the gas-liquid outlet; the liquid inlet includes a second inlet pipe and a nozzle; the nozzle is located at the end of the second inlet pipe and is used to spray the scrubbing liquid introduced by the second inlet pipe into the gas inlet cavity in the form of a high-speed jet; the airflow regulating device includes an regulating section and a transmission mechanism; the transmission mechanism is used to drive the regulating section to move up and down in the throat and constriction section regions to adjust the cross-sectional area of ​​the throat.

Description

Technical Field

[0001] This utility model belongs to the field of industrial dust removal and purification technology, and in particular relates to a Venturi scrubbing dust collector. Background Technology

[0002] In the field of industrial dust removal, Venturi scrubbers are widely used because they can simply and efficiently remove fine dust particles from gases. The scrubbing efficiency of a Venturi scrubber is significantly affected by the gas velocity as it passes through the throat. When the gas velocity is high, the gas mixes more evenly with the sprayed liquid, resulting in higher dust removal efficiency; conversely, a lower velocity leads to lower efficiency.

[0003] Under existing industrial dust removal applications, the flow rates of process gases or exhaust gases are often unstable due to variations in gas temperature and pressure. When the flow rate of the treated gas changes, it causes instability in the gas velocity at the throat, leading to inconsistent dust removal efficiency and making it difficult to meet the design requirements of the dust collector. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a Venturi scrubbing dust collector that maintains stable and efficient scrubbing dust removal even when the flow rate of the gas being processed changes.

[0005] The Venturi scrubber includes a gas inlet, a liquid inlet, a gas-liquid outlet, a constriction section, a throat, a diffuser, and an airflow regulating device. The gas inlet includes a first inlet pipe and a gas inlet chamber; the first inlet pipe is connected to an upstream device of the Venturi scrubber for introducing gas from the upstream device into the Venturi scrubber; the upper end of the gas inlet chamber is connected to the first inlet pipe, and the lower end is connected to the upper end of the constriction section; the throat is located between the constriction section and the diffuser; the end of the diffuser is connected to the gas-liquid outlet. The liquid inlet is located on the gas inlet and includes a second inlet pipe and a nozzle; the second inlet pipe communicates with the gas inlet chamber; the nozzle is located at the end of the second inlet pipe and is used to spray the scrubbing liquid introduced by the second inlet pipe into the gas inlet chamber as a scrubbing liquid jet. The airflow regulating device includes an regulating section and a transmission mechanism; the transmission mechanism drives the regulating section to move up and down in the throat and constriction section regions to adjust the cross-sectional area of ​​the throat.

[0006] In one possible implementation, the top of the regulating section is an ellipsoidal surface facing the washing liquid jet and gas; the lower part of the regulating section is an inverted cone shape.

[0007] In one possible implementation, the transmission mechanism includes a handwheel and a connecting rod; one end of the connecting rod is connected to the lower part of the adjusting part, and the other end is connected to the handwheel; an outlet seat is provided on the pipe wall of the gas-liquid discharge part, and the connecting rod enters the cavity of the Venturi scrubbing dust collector through the outlet seat.

[0008] In another possible implementation, the airflow regulating device also includes a controller and a flow sensor; the transmission mechanism includes a connecting rod and a servo drive; one end of the connecting rod is connected to the lower part of the regulating section, and the other end is connected to the servo drive; an outlet seat is provided on the pipe wall of the gas-liquid discharge section, and the connecting rod enters the cavity of the Venturi scrubbing dust collector through the outlet seat; the flow sensor is located at the gas inlet section, which collects gas flow information from the upstream equipment in real time and transmits the gas flow information to the controller; the controller is used to issue regulation commands to the servo drive according to the fluctuation of the gas flow information, and the servo drive drives the regulating section to move through the connecting rod.

[0009] In one possible implementation, a sealing part is provided inside the lead-out seat to isolate the inside and outside of the venturi scrubber cavity.

[0010] In one possible implementation, the angle between the first inlet pipe and the centerline of the gas inlet cavity is 100°-120°, and the lowest point of the intersection line formed by the first inlet pipe and the gas inlet cavity is higher than the plane where the nozzle outlet is located, and the distance between the two planes is not less than 5mm.

[0011] In one possible implementation, a vane-type distributor is provided at the nozzle inlet; the washing liquid first passes through the vane-type distributor to form a rotating fluid before entering the nozzle.

[0012] In one possible implementation, when the gas flow rate from the upstream device decreases, the regulating part is driven to move toward the throat via a transmission mechanism to reduce the cross-sectional area of ​​the throat and increase the gas flow rate through the throat; when the gas flow rate from the upstream device increases, the regulating part is driven to move away from the throat via a transmission mechanism to increase the cross-sectional area of ​​the throat and decrease the gas flow rate through the throat.

[0013] In one possible implementation, a portion of the washing liquid jet is cut and collided with by gas at the end of the constriction section, becoming dispersed droplets; the remaining washing liquid jet that does not become dispersed droplets is sprayed onto the top of the regulating section, where it is sputtered to form a liquid film.

[0014] In one possible implementation, a guide ring is provided in the diffuser cavity to position the connecting rod.

[0015] The beneficial effects of this utility model are: The Venturi scrubbing dust collector of this invention can adjust the position of the regulating part in the throat and contraction area according to the gas flow changes from the upstream equipment, so that the scrubbing dust collector can always maintain a stable and efficient scrubbing dust removal efficiency, ensuring that the treated gas always meets the emission standards, while saving energy consumption.

[0016] The top of the regulating section is an ellipsoidal surface. The washing liquid jet, which is not cut or collided into dispersed droplets, is sprayed onto the top of the regulating section, forming a secondary uniform liquid film in the direction of gas flow. This increases the capture probability of gas dust particles and helps to improve dust removal efficiency.

[0017] The rotary vane distributor installed at the nozzle inlet can increase the rotational dispersion effect of the washing liquid, increase the contact area between the high-speed jet of washing liquid and the gas being treated, and enhance the washing and dust removal effect.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a limitation of scale. Wherein: Figure 1 This is a schematic diagram of the structure of a Venturi scrubber dust collector provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of an adjustment part provided in an embodiment of this application; Figure 3 This is a control schematic diagram of an airflow regulating device provided in an embodiment of this application.

[0020] Figure label: 10, Gas inlet section; 101, First inlet pipe; 102, Gas inlet cavity; 20, Liquid inlet; 201, Second inlet pipe; 202, Nozzle; 30. Gas-liquid discharge section; 40, contraction section; 50. Throat; 60, Diffuser section; 701, Adjustment section; 7011, Top; 7012, Lower section; 702, Transmission mechanism; 7021, Handwheel; 7022, Linkage rod; 7023, Servo driver; 703, Controller; 704, Flow sensor; 80, leading to the seat; 90, Sealing part; 100, Rotary vane splitter; 110, guide ring; 120, flange. Detailed Implementation

[0021] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this utility model. In the following description, for ease of explanation, several details are used to provide a full understanding of this utility model. However, this utility model can still be practiced without these details. In other instances, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein.

[0023] In this invention, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and are not intended to limit the indicated device, element, or component to having a specific orientation, or to require it to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may have other meanings besides indicating orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Combination Figure 1 As shown in the figure, this application provides a schematic diagram of the structure of a Venturi scrubbing dust collector. The Venturi scrubbing dust collector includes: a gas inlet 10, a liquid inlet 20, a gas-liquid outlet 30, a contraction section 40, a throat 50, a diffuser 60, and an airflow regulating device.

[0026] The gas inlet section 10 includes a first inlet pipe 101 and a gas inlet chamber 102. The first inlet pipe 101 is connected to an upstream device of the Venturi scrubber and is used to introduce gas from the upstream device into the Venturi scrubber. The upper end of the gas inlet chamber 102 is connected to the first inlet pipe 101, and the lower end is connected to the upper end of the contraction section 40. A throat 50 is disposed between the contraction section 40 and the diffuser section 60. The end of the diffuser section 60 is connected to the gas-liquid discharge section 30. A liquid inlet section 20 is disposed on the gas inlet section 10 and includes a second inlet pipe 201 and a nozzle 202. The second inlet pipe 201 is connected to the gas inlet chamber 102. The nozzle 202 is located at the end of the second inlet pipe 201 and is used to spray the scrubbing liquid introduced by the second inlet pipe 201 into the gas inlet chamber 102 as a scrubbing liquid jet. The airflow regulating device includes an regulating part 701 and a transmission mechanism 702; the transmission mechanism 702 is used to drive the regulating part 701 to move up and down in the throat 50 and contraction 40 region to regulate the cross-sectional area of ​​the throat 50.

[0027] In this embodiment, the Venturi scrubbing dust collector can adjust the position of the regulating part 701 in the throat 50 and contraction part 40 regions according to the gas flow changes of the upstream equipment, so that the scrubbing dust collector always maintains a stable and efficient scrubbing dust removal efficiency, ensuring that the treated gas always meets the emission standards, while saving energy consumption.

[0028] Optionally, when the gas flow rate from the upstream equipment decreases, the adjustment unit 701 is driven to move toward the throat 50 via the transmission mechanism 702, reducing the cross-sectional area of ​​the throat 50 and increasing the gas flow velocity through the throat 50. This improves the dust removal efficiency.

[0029] Optionally, when the gas flow rate from the upstream equipment increases, the adjustment unit 701 is driven by the transmission mechanism 702 to move away from the throat 50, increasing the cross-sectional area of ​​the throat 50 and thus reducing the gas velocity passing through the throat 50. This ensures high dust removal efficiency while saving energy consumption.

[0030] In this embodiment, when the flow rate of gas from the upstream equipment fluctuates (e.g., the flow rate is higher or lower than a preset threshold within a preset time period) or exceeds a preset threshold range, the transmission mechanism 702 drives the adjustment unit 701 to adjust the cross-sectional area of ​​the throat 50, thereby adjusting the gas flow rate through the throat 50 and dynamically adjusting the dust removal efficiency to stabilize it. Thus, the Venturi scrubber maintains a consistently high scrubbing and dust removal effect while reducing energy consumption, ensuring that the treated gas always meets emission standards while saving energy.

[0031] Optionally, the transmission mechanism 702 includes a handwheel 7021 and a connecting rod 7022. One end of the connecting rod 7022 is connected to the lower part of the adjusting part 701, and the other end is connected to the handwheel 7021. Thus, by rotating the handwheel 7021, the connecting rod 7022 is driven to move up and down, thereby causing the adjusting part 701 to move up and down in the throat 50 and contraction part 40 region to adjust the cross-sectional area of ​​the throat 50.

[0032] Optionally, an outlet seat 80 is provided on the pipe wall of the gas-liquid discharge section 30, and the connecting rod 7022 enters the cavity of the Venturi scrubbing dust collector through the outlet seat 80.

[0033] Optionally, the lead-out seat 80 is provided with a sealing part 90 to isolate the inside and outside of the cavity of the Venturi scrubber.

[0034] For example, the sealing part 90 is a sealing packing ring.

[0035] Optionally, a guide ring 110 is provided in the cavity of the diffuser 60 to position the connecting rod 7022.

[0036] Optionally, the angle between the first inlet pipe 101 and the centerline of the gas inlet chamber 102 is 100°-120°. This prevents the washing liquid from backflowing into the first inlet pipe 101, thus avoiding contamination of the gas from upstream equipment and corrosion of the upstream equipment by the washing liquid.

[0037] Optionally, the lowest point of the intersection line formed by the first inlet pipe 101 and the gas inlet cavity 102 is higher than the plane where the nozzle 202 outlet is located, and the distance between the two planes is not less than 5 mm.

[0038] Optionally, a vane-type distributor 100 is provided at the inlet of nozzle 202; the washing liquid first passes through the vane-type distributor 100 to form a rotating fluid before entering nozzle 202. In this way, by providing a vane-type distributor 100 at the inlet of nozzle 202 to improve the self-rotation capability of the washing liquid, the rotational dispersion effect of the washing liquid can be increased, the contact area between the washing liquid jet and the gas being treated can be increased, and the washing and dust removal effect can be enhanced.

[0039] For example, the vane splitter 100 includes 3-6 vanes.

[0040] Optionally, a portion of the washing liquid jet is cut and collided by gas at the end of the contraction section 40, becoming dispersed droplets; the washing liquid jet that does not become dispersed droplets is sprayed onto the top of the adjustment section 701, sputtering to form a liquid film.

[0041] The top of the regulating section 701 is an ellipsoid. The washing liquid jet that has not yet become dispersed droplets is sprayed onto the top of the regulating section 701, forming a secondary uniform liquid film in the direction of gas flow. This increases the probability of capturing gas dust particles and helps to improve dust removal efficiency.

[0042] Optionally, the throat 50 is equipped with a removable flange 120 to facilitate the installation and maintenance of the Venturi scrubber.

[0043] like Figure 2 As shown, this embodiment of the application provides an adjustment section 701. The top 7011 of the adjustment section 701 is an ellipsoidal surface, facing the washing liquid jet and gas; the lower part 7012 of the adjustment section 701 is an inverted cone shape. Thus, by setting the top 7011 as an ellipsoidal surface, a uniform secondary splash of liquid can be formed after the washing liquid is sprayed, forming a large-area thin liquid film in the airflow direction, increasing the probability of capturing dust particles in the gas and increasing dust removal efficiency; setting the lower part 7022 as an inverted cone shape does not affect the uniform mixing of the fluid in the throat, facilitates the adjustment of the cross-sectional area, and can increase the relative flow velocity of the gas-liquid fluid.

[0044] Optionally, the lower part 7012 of the adjusting part 701 is provided with a threaded hole, and the adjusting part 701 can be connected to the connecting rod 7022 through the thread and the threaded hole. The threaded hole facilitates the assembly and disassembly of the connecting rod 7022.

[0045] like Figure 3 As shown, this application embodiment provides a control method for an airflow regulating device. The airflow regulating device also includes a controller 703 and a flow sensor 704. The transmission mechanism 702 includes a connecting rod 7022 and a servo driver 7023; one end of the connecting rod 7022 is connected to the lower part of the regulating section, and the other end is connected to the servo driver 7023. The flow sensor 704 is installed at the gas inlet section, which collects gas flow information from the upstream equipment in real time and transmits the gas flow information to the controller 703; the controller 703 is used to issue regulation commands to the servo driver 7023 according to the fluctuation of the gas flow information, and the servo driver 7023 drives the regulating section to move through the connecting rod 7022.

[0046] In this way, the movement of the adjustment unit can be controlled more intelligently and precisely through automated adjustment.

[0047] The following is an exemplary description of how the controller controls the servo driver to move the linkage up and down based on fluctuations in gas flow information: As an example, when the gas flow rate is below a preset threshold range, the controller controls the servo driver to move the linkage towards the throat. When the gas flow rate is above the preset threshold range, the controller controls the servo driver to move the linkage away from the throat.

[0048] The preset threshold range can be set according to the user's actual needs. For example, when the gas flow information is within the preset threshold range, the dust removal efficiency is stable, and the treated gas always meets the emission standards, while saving energy consumption.

[0049] In another example, if the gas flow rate is below a preset threshold within a preset time period, the controller controls the servo driver to move the linkage towards the throat. If the gas flow rate is above a preset threshold within a preset time period, the controller controls the servo driver to move the linkage away from the throat.

[0050] This allows for more precise and intelligent control of dust removal efficiency, resulting in more stable dust removal efficiency.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0052] The embodiments of this utility model are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A Venturi scrubbing dust collector, characterized in that, include: Gas inlet, liquid inlet, gas-liquid outlet, constriction section, throat, diffuser, and airflow regulating device; The gas inlet section includes a first inlet pipe and a gas inlet cavity; The first inlet pipe is connected to the upstream equipment of the Venturi scrubber and is used to introduce gas from the upstream equipment into the Venturi scrubber; the upper end of the gas inlet chamber is connected to the first inlet pipe, and the lower end is connected to the upper end of the constriction section; the throat is located between the constriction section and the diffuser section; the end of the diffuser section is connected to the gas-liquid discharge section. The liquid inlet is provided on the gas inlet and includes a second inlet pipe and a nozzle; The second inlet pipe is connected to the gas inlet chamber; the nozzle is located at the end of the second inlet pipe and is used to spray the washing liquid introduced by the second inlet pipe into the gas inlet chamber in the form of a washing liquid jet. The airflow regulating device includes an regulating section and a transmission mechanism; the transmission mechanism is used to drive the regulating section to move up and down in the throat and constriction regions to adjust the cross-sectional area of ​​the throat.

2. The Venturi scrubbing dust collector according to claim 1, characterized in that, The top of the regulating section is an ellipsoidal surface, facing the washing liquid jet and gas; the lower part of the regulating section is an inverted cone shape.

3. The Venturi scrubbing dust collector according to claim 1, characterized in that, The transmission mechanism includes a handwheel and a connecting rod; one end of the connecting rod is connected to the lower part of the adjusting part, and the other end is connected to the handwheel; an outlet seat is provided on the pipe wall of the gas-liquid discharge part, and the connecting rod enters the cavity of the Venturi scrubbing dust collector through the outlet seat.

4. The Venturi scrubbing dust collector according to claim 1, characterized in that, The airflow regulating device also includes a controller and a flow sensor; the transmission mechanism includes a connecting rod and a servo driver; one end of the connecting rod is connected to the lower part of the regulating section, and the other end is connected to the servo driver; an outlet seat is provided on the pipe wall of the gas-liquid discharge section, and the connecting rod enters the cavity of the Venturi scrubbing dust collector through the outlet seat; the flow sensor is located in the gas inlet section, which collects gas flow information from the upstream equipment in real time and transmits the gas flow information to the controller; the controller is used to send regulation commands to the servo driver according to the fluctuation of the gas flow information, and the servo driver drives the regulating section to move through the connecting rod.

5. The Venturi scrubbing dust collector according to claim 3 or 4, characterized in that, The outlet seat is equipped with a sealing part to isolate the inside and outside of the venturi scrubber chamber.

6. The Venturi scrubbing dust collector according to claim 1, characterized in that, The angle between the first inlet pipe and the centerline of the gas inlet chamber is 100°-120°. The lowest point of the intersection line formed by the first inlet pipe and the gas inlet chamber is higher than the plane where the nozzle outlet is located, and the distance between the two planes is not less than 5mm.

7. The Venturi scrubbing dust collector according to claim 1, characterized in that, A vane-type distributor is installed at the nozzle inlet; the washing liquid first passes through the vane-type distributor to form a rotating fluid before entering the nozzle.

8. The Venturi scrubbing dust collector according to claim 1, characterized in that, When the gas flow rate from the upstream equipment decreases, the regulating part is driven to move towards the throat via the transmission mechanism to reduce the cross-sectional area of ​​the throat and increase the gas flow rate through the throat. When the gas flow rate from the upstream equipment increases, the regulating part is driven to move away from the throat via the transmission mechanism to increase the cross-sectional area of ​​the throat and decrease the gas flow rate through the throat.

9. The Venturi scrubbing dust collector according to claim 2, characterized in that, A portion of the washing liquid jet is cut and collided with by the gas at the end of the constriction section, turning into dispersed droplets; The washing liquid jet that has not yet become dispersed droplets is sprayed onto the top of the regulating section, where it is splashed to form a liquid film.

10. The Venturi scrubbing dust collector according to claim 3 or 4, characterized in that, A guide ring is installed inside the diffuser cavity to position the connecting rod.

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