Venturi scrubber tower

Abstract

The utility model discloses a kind of venturi scrubbing towers, including main body box;Venturi tube, vertically arranged and with the top of main body box intercommunication, venturi tube from top to bottom sequentially includes tower entrance, spray window, reducer, throat pipe, gradually expanding pipe, throat pipe is the minimum place of internal diameter of venturi tube;Additional box, with the side surface of main body box intercommunication, additional box has the tower outlet for gas discharge;Wherein, venturi tube inside and with the transverse position of spray window being located are provided with spray nozzle;The top surface of main body box is also provided with demisting spray interface. Adopt this utility model by venturi tube structure accelerates airflow and atomizes washing liquid, greatly improves pollutant trapping efficiency. The demisting spray interface of the top of main body box can further reduce gas liquid carrying, improve emission cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of industrial scrubbing towers, specifically to a Venturi scrubbing tower. Background Technology

[0002] Industrial production often generates waste gas containing pollutants such as dust, smoke, and mist. The emission of such waste gas can cause environmental pollution problems, making gas purification equipment a key piece of equipment for industrial environmental protection.

[0003] While existing scrubbing tower-type purification equipment possesses basic purification functions, it often suffers from limitations such as insufficient gas-liquid contact and poor atomization of the scrubbing liquid, resulting in low fine particulate matter capture efficiency and insufficient adaptability to complex operating conditions such as high temperature, high humidity, and flammability. Furthermore, some equipment materials exhibit poor corrosion resistance and stability, and their service life needs improvement. Therefore, it is necessary to meet the diverse demands of industrial production for purification efficiency, adaptability to operating conditions, and long-term stable operation. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a Venturi scrubbing tower.

[0005] To solve the above problems, this utility model provides a Venturi scrubbing tower. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows: A Venturi scrubbing tower includes: a main body; a Venturi tube, vertically arranged and connected to the top of the main body, wherein the Venturi tube includes, from top to bottom, a tower inlet, a spray window, a converging tube, a throat, and a diverging tube, wherein the throat is the smallest part of the inner diameter of the Venturi tube; an auxiliary box, connected to the side of the main body, wherein the auxiliary box has a tower outlet for gas discharge; wherein, a spray nozzle is provided inside the Venturi tube and at a horizontal position relative to the spray window; and a demisting spray interface is also provided on the top surface of the main body.

[0006] As a further improvement of this utility model, the axial length of the expanding tube is greater than the axial length of the contracting tube, and the cone angle of the inner wall of the contracting tube is greater than the cone angle of the inner wall of the expanding tube.

[0007] As a further improvement of this utility model, the axial length of the throat is not less than the axial length of the tapered tube.

[0008] As a further improvement of this utility model, the spray nozzle forms a conical spray area, which covers the inlet end of the tapered tube.

[0009] As a further improvement of this utility model, the volume of the main body box is greater than the sum of the volumes of the Venturi tube and the auxiliary box.

[0010] As a further improvement of this utility model, the side wall and top of the auxiliary box are provided with an outlet end window, and the orientation of the outlet end window is perpendicular to the orientation of the tower outlet.

[0011] As a further improvement of this utility model, a pump inlet flange, a level gauge, a discharge port, and an overflow port are provided on the same side of the main body box.

[0012] As a further improvement of this utility model, the height of the pump inlet flange and the discharge port is lower than the height of the overflow port; there are two level gauges, one of which is at a height not lower than the overflow port, and the other is at a height lower than the overflow port but higher than the discharge port.

[0013] As a further improvement of this utility model, a manhole, a water supply window, and a water supply interface are provided on the same side of the main body box; the inner diameter of the manhole is larger than the inner diameter of the water supply window and the water supply interface; the orientation of the manhole is perpendicular to the orientation of the pump inlet flange.

[0014] As a further improvement of this utility model, the venturi tube is made of fiberglass and the main body box is made of polypropylene.

[0015] The beneficial technical effects of using the Venturi scrubbing tower of this application are: By using the converging tube, throat, and expanding tube structure of the Venturi tube, along with the spray nozzles that correspond to the spray window inside, the airflow can be accelerated by the Venturi effect, so that the washing liquid can be fully atomized, greatly increasing the gas-liquid contact area and improving the collection efficiency of pollutants such as dust, soot, and droplets in the exhaust gas.

[0016] The spray window allows for direct observation of the spray nozzles' working status and spray pattern, facilitating timely detection and adjustment of spray abnormalities, and ensuring the stable operation of the equipment's purification process.

[0017] The demisting spray interface on the top of the main unit can demistate the purified gas, reduce the liquid droplets carried by the gas, further improve the cleanliness of the emitted gas, and meet the environmental protection emission requirements. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of one embodiment of the present invention; Figure 2This is a side view of one embodiment of the present invention; Figure 3 This is a top view of one embodiment of the present invention.

[0020] 1-Tower inlet; 2-Spray window; 3-Converging pipe; 4-Throat; 5-Diverging pipe; 6-Demisting spray interface; 7-Outlet window; 8-Tower outlet; 9-Manhole; 10-Make-up water window; 11-Make-up water interface; 12-Pump inlet flange; 13-Level gauge; 14-Discharge port; 15-Overflow port; 16-Pump outlet flange; 17-Main box; 18-Auxiliary box; 19-Venturi tube; 20-Spray nozzle. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments: To achieve the purpose of this utility model, please refer to Figures 1 to 3 A Venturi scrubbing tower includes: a main body 17; a Venturi tube 19, vertically arranged and connected to the top of the main body 17, comprising, from top to bottom, a tower inlet 1, a spray window 2, a converging tube 3, a throat 4, and a diverging tube 5, with the throat 4 being the smallest point of the Venturi tube 19's inner diameter; and an auxiliary box 18, connected to the side of the main body 17, having a tower outlet 8 for gas discharge. Spray nozzles 20 are located inside the Venturi tube 19 and at the same horizontal position as the spray window 2. A demisting spray interface 6 is also provided on the top surface of the main body 17.

[0022] To clearly express the structural principles, Figure 1 The image shows the spray nozzle 20, which is concealed by the outer wall of the Venturi tube 19. Figure 2 The arrows in the image represent air vents.

[0023] The beneficial effects of adopting the above technical solution are: the Venturi scrubber is a highly efficient gas purification device. Utilizing the working principle of the Venturi effect, it atomizes the scrubbing liquid through high-speed airflow, thereby greatly increasing the gas-liquid contact area. It can efficiently remove pollutants such as dust, smoke, and mist droplets from exhaust gas, and is particularly good at treating high-temperature, high-humidity, and flammable exhaust gases.

[0024] By defining the basic structure of the Venturi scrubber, a Venturi tube 19, comprising a tower inlet 1, a spray window 2, a converging tube 3, a throat 4, and a diverging tube 5, is vertically installed at the top of the main casing 17. Spray nozzles 20 are installed inside the corresponding spray window 2 positions. Simultaneously, the main casing 17 is connected to an auxiliary casing 18 with a tower outlet 8. This structure fully utilizes the Venturi effect, causing the high-speed airflow to strongly mix and atomize with the scrubbing liquid sprayed from the spray nozzles 20 at the throat 4, greatly increasing the gas-liquid contact area. This enables efficient capture of pollutants such as dust, soot, and droplets in the exhaust gas, improving overall purification efficiency. The demisting spray interface 6 at the top of the main casing 17 can further demistate the gas, reducing droplet carryover in the exhaust gas and meeting higher clean emission requirements.

[0025] In some other embodiments of this utility model, the axial length of the expanding tube 5 is greater than the axial length of the contracting tube 3, and the cone angle of the inner wall of the contracting tube 3 is greater than the cone angle of the inner wall of the expanding tube 5.

[0026] The beneficial effects of adopting the above technical solution are: optimizing the acceleration and recovery process of the airflow within the Venturi tube 19. A larger tapered cone angle facilitates rapid gas acceleration to the throat 4, while a longer diverging section and a smaller cone angle facilitate smooth airflow deceleration and effective pressure recovery, reducing energy consumption and turbulence, thereby improving gas-liquid separation efficiency and system operational stability.

[0027] In some other embodiments of this utility model, the axial length of the throat 4 is not less than the axial length of the tapered tube 3.

[0028] The beneficial effects of adopting the above technical solution are: ensuring that the airflow maintains sufficient residence time at the minimum cross-section, allowing the gas and atomized droplets to have more sufficient mixing and collision opportunities, which is conducive to improving the collection efficiency of fine particulate matter, especially for pollutants with small particle size that are difficult to capture, it has a better removal effect.

[0029] In some other embodiments of this utility model, the spray nozzle 20 can spray out a conical spray area that covers the inlet end of the tapered tube 3.

[0030] The beneficial effects of adopting the above technical solution are: it can ensure that the washing liquid is fully introduced and atomized in the early stage of airflow acceleration, so that the droplets are evenly distributed on the entire airflow cross section, avoiding the occurrence of spray blind zones, thereby improving the utilization rate of washing liquid and the uniformity of gas-liquid contact, and further enhancing the purification effect.

[0031] In some other embodiments of this utility model, the volume of the main body box 17 is greater than the sum of the volumes of the Venturi tube 19 and the auxiliary box 18.

[0032] The beneficial effects of adopting the above technical solution are: it provides ample space for the deceleration, separation, and sedimentation of the gas-liquid mixture within the main chamber 17. The larger volume helps to reduce the airflow velocity, promotes the sedimentation of droplets and pollutants, improves the gas-liquid separation efficiency, and can also accommodate more washing liquid, enhancing the system's buffering capacity against flow fluctuations.

[0033] In some other embodiments of this utility model, the side wall and top of the auxiliary box 18 are provided with an outlet end window 7, and the orientation of the outlet end window 7 is perpendicular to the orientation of the tower outlet 8.

[0034] The advantages of adopting the above technical solution are: it facilitates the observation of the state and emission of the purified gas from different angles, timely detection of possible entrained droplets or abnormal phenomena, and is beneficial to equipment operation monitoring and maintenance.

[0035] like Figure 1 As shown, in some other embodiments of this utility model, a pump inlet flange 12, a level gauge 13, a discharge port 14, and an overflow port 15 are provided on the same side of the main body box 17.

[0036] The advantages of adopting the above technical solution are: setting these interfaces on the same side simplifies the layout of pipelines and interfaces, making installation and daily maintenance easier. This integrated design saves space, reduces leakage points, and improves the overall integrity and ease of operation of the equipment.

[0037] In some other embodiments of this invention, the height of the pump inlet flange 12 and the discharge port 14 is lower than the height of the overflow port 15. There are two level gauges 13, one of which is at a height not lower than the overflow port 15, and the other is at a height lower than the overflow port 15 but higher than the discharge port 14.

[0038] In addition, such as Figure 3 As shown, the main body box 17 is equipped with a pump outlet flange 16 on the top.

[0039] The beneficial effects of adopting the above technical solution are: the level gauge 13 can realize accurate monitoring and automatic control of the washing liquid level. The high-level level gauge 13 can provide early warning of overflow, and the low-level level gauge 13 can monitor the minimum working liquid level, thereby ensuring that the system operates stably within the safe liquid level range and preventing pump cavitation or liquid overflow.

[0040] like Figure 2 As shown, in some other embodiments of this utility model, a manhole 9, a water supply window 10, and a water supply interface 11 are provided on the same side of the main body box 17. The inner diameter of the manhole 9 is larger than the inner diameter of the water supply window 10 and the water supply interface 11. The orientation of the manhole 9 is perpendicular to the orientation of the pump inlet flange 12.

[0041] The beneficial effects of adopting the above technical solution are as follows: Manhole 9 is a safe opening structure for personnel to enter and exit the equipment for installation and maintenance. It facilitates personnel entry into the enclosure for maintenance and cleaning while avoiding interference between different functional openings. The large size of manhole 9 provides a safe passage for entry and exit, and the vertical layout optimizes the utilization of the side space of the equipment and operational safety.

[0042] In some other embodiments of this utility model, the venturi tube 19 is made of fiberglass and the main body box 17 is made of polypropylene.

[0043] Regarding the specific preferred materials, the tower inlet 1, the frame of the spray window 2, the converging pipe 3, the throat 4, and the diverging pipe 5 are made of FRP (fiberglass reinforced plastic). The demisting spray interface 6 is made of PVC (polyvinyl chloride). The frame of the outlet window 7, the tower outlet 8, the manhole 9, the frame of the water supply window 10, the water supply interface 11, the pump inlet flange 12, the discharge port 14, the overflow port 15, and the pump outlet flange 16 are made of PP (polypropylene).

[0044] The beneficial effects of adopting the above technical solution are: it fully utilizes the corrosion resistance and high strength of fiberglass to cope with the scouring of high-speed corrosive airflow inside the Venturi tube, and the chemical corrosion resistance and lightweight properties of polypropylene to adapt to long-term contact with the washing liquid inside the main tank 17. This combination of materials significantly improves the overall durability of the equipment in corrosive environments while ensuring structural strength.

[0045] The working principle of the Venturi scrubber in this application is as follows: Polluted gas and washing liquid enter the constriction section (throat 4) of Venturi tube 19, where the airflow accelerates (Venturi effect). The high-speed airflow impacts and atomizes the liquid into tiny droplets. The extremely high gas-liquid contact area, inertial collision, and interception constitute its core collection mechanism. Then, in the diffusion section of Venturi tube 19, the airflow decelerates and the pressure rises. The gas-liquid mixture enters the separator, where centrifugal force and inertia promote separation. The purified gas is discharged, and after the droplets condense, the waste liquid is collected and treated.

[0046] Atomization Step (at throat 4): Polluted gas is drawn into the Venturi tube 19 by the fan. The tube gradually narrows (reducing tube 3), decreasing its cross-sectional area. According to Bernoulli's principle, the gas velocity increases sharply (up to 60-120 m / s), while the static pressure decreases. A washing liquid (usually water, sometimes with added chemicals such as alkali to neutralize acidic gases) is introduced at the inlet of throat 4 or through multiple spray nozzles 20. The significant relative velocity difference between the high-speed airflow and the low-speed liquid flow generates a powerful shear force, tearing and atomizing the liquid into countless extremely small droplets.

[0047] Collision and capture steps (at throat 4): Throat 4 is filled with high-speed moving pollutants (dust, droplets, etc.) and newly atomized tiny washing droplets. Due to the large number of droplets and their small size, the pollutants (whose mass is usually larger than the droplets) cannot bypass these droplets at high speeds and will directly collide with and adhere to the droplet surface due to inertial forces. In addition, fine particles are also captured by the liquid through mechanisms such as diffusion and interception. This is the core physical process of particulate matter capture in a Venturi scrubber.

[0048] Separation Steps (in the Separator): After leaving the Venturi throat, the gas-liquid mixture enters a diffuser 5, where the pipe gradually expands, the airflow velocity decreases, and the pressure is partially restored. Subsequently, the mixture enters a separator (usually a cyclone separator or demister). In the separator, due to the reduced flow velocity and centrifugal force, the heavier droplets containing contaminants separate from the gas and fall along the wall into the collection tank.

[0049] Discharge procedure: The purified gas is then discharged.

[0050] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A Venturi scrubbing tower, characterized in that, include: Main body box; The Venturi tube is arranged vertically and connected to the top of the main box. The Venturi tube includes, from top to bottom, a tower inlet, a spray window, a converging tube, a throat, and a diverging tube. The throat is the point where the inner diameter of the Venturi tube is the smallest. An auxiliary box, connected to the side of the main box, is provided with a tower outlet for gas discharge; Spray nozzles are provided inside the venturi tube and at a horizontal position relative to the spray window; The top surface of the main body box is also equipped with a defogging spray interface.

2. The Venturi scrubbing tower according to claim 1, characterized in that: The axial length of the expanding tube is greater than the axial length of the contracting tube, and the cone angle of the inner wall of the contracting tube is greater than the cone angle of the inner wall of the expanding tube.

3. The Venturi scrubbing tower according to claim 1, characterized in that: The axial length of the throat is not less than the axial length of the tapered tube.

4. The Venturi scrubbing tower according to claim 1, characterized in that: The spray nozzle forms a conical spray area that covers the inlet end of the tapered tube.

5. The Venturi scrubbing tower according to claim 1, characterized in that: The volume of the main box is greater than the sum of the volumes of the Venturi tube and the auxiliary box.

6. The Venturi scrubbing tower according to claim 1, characterized in that: The auxiliary box is provided with an outlet end window on both its side wall and top, and the orientation of the outlet end window is perpendicular to the orientation of the tower outlet.

7. The Venturi scrubbing tower according to claim 1, characterized in that: The main body box is equipped with a pump inlet flange, a level gauge, a discharge port, and an overflow port on the same side.

8. The Venturi scrubbing tower according to claim 7, characterized in that: The height of the pump inlet flange and the outlet is lower than the height of the overflow outlet; There are two level gauges, one of which is located at a height not lower than the overflow port, and the other is located at a height lower than the overflow port but higher than the discharge port.

9. The Venturi scrubbing tower according to claim 7, characterized in that: A manhole, a water supply window, and a water supply interface are provided on the same side of the main body box; The inner diameter of the manhole is larger than the inner diameter of the water supply window and the water supply interface; The orientation of the manhole is perpendicular to the orientation of the pump inlet flange.

10. The Venturi scrubbing tower according to claim 1, characterized in that: The venturi tube is made of fiberglass, and the main body box is made of polypropylene.

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