Tail gas treatment spraying assembly

Abstract

The utility model provides a tail gas treatment spray assembly, which relates to the technical field of tail gas treatment and comprises a transverse main pipe and a longitudinal branch pipe, a plurality of spray head mechanisms are mounted on the longitudinal branch pipe, and each spray head mechanism comprises a spray cylinder, a support beam rod, a water diversion frustum, a centrifugal impeller and a resistance adjusting mechanism. The centrifugal impeller is rotationally connected to the middle of the supporting beam rod, a plurality of impact blades are distributed on the circumference of the outer ring of the centrifugal impeller, the resistance adjusting mechanism comprises a coaxial base, a centrifugal sliding disc, centrifugal balls and a friction ring, a plurality of inclined sliding grooves are distributed in the circumference of the lower side of the coaxial base, and the centrifugal balls are slidably placed in the inclined sliding grooves; a reset spring is fixed to the lower side of the friction ring, a positioning piece is fixed to the lower end of the reset spring, and the lower side of the outer wall of the supporting beam rod is in threaded connection with a resistance adjusting nut. According to the utility model, the spraying coverage range and the droplet density can be changed by changing the rotation resistance of the centrifugal impeller.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, specifically to an exhaust gas treatment spray assembly. Background Technology

[0002] In the field of industrial waste gas treatment, exhaust gas spraying technology, through the collision, adsorption, and chemical reaction between droplets and pollutants, has become a key means of reducing particulate matter, acidic gases, and volatile organic compounds. The coverage area and droplet density of the spraying system directly determine the gas-liquid contact efficiency, while the droplet density affects the escape rate of exhaust gas, thus affecting the purification effect.

[0003] Currently, the nozzles in the spray systems of spray towers on the market usually adopt a fixed structure, and the coverage range is adjusted by regulating the water pressure. However, when the spray pipes are fixed in the spray system, reducing the water pressure means a reduction in the amount of spray water, and the number of droplets decreases accordingly, making it impossible to control the changes in coverage range and droplet density. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an exhaust gas treatment spray assembly, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A tail gas treatment spray assembly includes a transverse main pipe and several longitudinal branch pipes that are interconnected. Several nozzle mechanisms are installed on the longitudinal branch pipes. Each nozzle mechanism includes a spray cylinder, a support beam, a water-distributing cone, a centrifugal impeller, and a resistance adjustment mechanism. The spray cylinder is threadedly connected to the lower end of the longitudinal branch pipes. The top of the support beam is fixed in the middle of the spray cylinder and extends downward. The water-distributing cone is fixed on the support beam and positioned directly below the spray cylinder. A connecting bearing is fixed in the middle of the centrifugal impeller. The inner ring of the connecting bearing is fixed in the middle of the support beam, and the outer ring of the connecting bearing is fixed in the middle of the centrifugal impeller. Several impact blades are distributed circumferentially on the outer ring of the centrifugal impeller. The impact blades are located on the outer side of the lower edge of the water-distributing cone.

[0009] Preferably, the resistance adjustment mechanism includes a coaxial seat integrally formed on the lower side of the centrifugal impeller, a centrifugal slide plate slidably sleeved on the support beam, centrifugal balls disposed between the coaxial seat and the centrifugal slide plate, and a friction ring abutting against the lower side of the centrifugal slide plate. The lower circumference of the coaxial seat is provided with a plurality of inclined slide grooves, and the centrifugal slide plate is provided with guide slide grooves that engage with the inclined slide grooves. The inclined slide grooves and guide slide grooves engage to form a sliding space for placing the centrifugal balls.

[0010] Preferably, the top sidewall of the inclined chute is configured as an inclined surface, and the depth of the inclined chute gradually decreases from the inside to the outside.

[0011] Preferably, a return spring is fixed to the lower side of the friction ring, a positioning plate is fixed to the lower end of the return spring, and an adjusting nut is threaded to the lower side of the outer wall of the support beam rod, with the adjusting nut abutting against the lower side of the positioning plate.

[0012] Preferably, the outer wall of the support beam is provided with a plurality of axial grooves, and the inner wall of the friction ring is provided with guide protrusions that slide and cooperate with the axial grooves.

[0013] (III) Beneficial Effects

[0014] This utility model provides an exhaust gas treatment spray assembly. It has the following beneficial effects:

[0015] 1. In this utility model, high-pressure water is sprayed downward from the spray cylinder through the horizontal main pipe and the longitudinal branch pipe, impacting the water distribution cone. It then turns along the side wall of the water distribution cone and impacts the impact blades of the centrifugal impeller, forming smaller droplets that spray outward and fall, forming a thin film of small water droplets. At the same time, the high-pressure water impacts the rotating blades, increasing the disorder of the high-speed water rushing out of the water distribution cone impacting the rotating impact blades, uniformly dispersing the liquid, and avoiding local concentrations that are too high or too low.

[0016] 2. In this invention, the centrifugal force generated during the rotation of the centrifugal impeller will cause the centrifugal balls to be thrown outward in the sliding space. The inclined surface of the inclined groove can push the centrifugal sliding plate downward, squeeze the friction ring, and increase the friction between the friction ring and the centrifugal sliding plate to adjust the rotational resistance of the centrifugal impeller, that is, increase the water spray pressure. The rotational resistance of the friction ring to the centrifugal impeller increases simultaneously, which can increase the energy loss of driving the impeller to rotate, reduce the initial velocity of the droplets after the water pressure is increased, and increase the water intake without changing the coverage of the thin liquid film of small water droplets, so as to increase the droplet density and prevent the exhaust gas from escaping.

[0017] 3. In this utility model, the resistance adjustment nut can be manually adjusted to squeeze the return spring and change the initial resistance of the friction ring to the centrifugal slide plate, so as to adjust the coverage range and droplet density of the thin liquid film of small water droplets to achieve the best effect and improve the purification efficiency of the spray tower. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a tail gas treatment spray assembly according to the present invention;

[0019] Figure 2 This is a schematic diagram of the nozzle mechanism in this utility model;

[0020] Figure 3 This is a cross-sectional view of the nozzle mechanism in this utility model;

[0021] Figure 4 This is an exploded view of the nozzle mechanism in this utility model.

[0022] In the diagram: 1. Horizontal main pipe; 2. Longitudinal branch pipe; 3. Sprinkler head mechanism; 31. Sprinkler cylinder; 32. Support beam; 33. Water distribution cone; 34. Centrifugal impeller; 4. Connecting ring; 5. Connecting bearing; 6. Impact blade; 7. Coaxial seat; 8. Centrifugal slide plate; 9. Centrifugal ball bearing; 10. Friction ring; 11. Inclined slide groove; 12. Return spring; 13. Positioning plate; 14. Adjustment nut. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model embodiment provides an exhaust gas treatment spray assembly, such as... Figure 1 As shown, it includes a transverse main pipe 1 and several longitudinal branch pipes 2 that are interconnected. The longitudinal branch pipes 2 extend from the transverse main pipe 1 to both sides. The length of the longitudinal branch pipes 2 gradually decreases from the middle to both sides to match the structure of the spray tower. Several nozzle mechanisms 3 are installed at intervals on the longitudinal branch pipes 2.

[0025] like Figure 2-4As shown, the nozzle mechanism 3 includes a spray cylinder 31, a support beam 32, a water distribution cone 33, a centrifugal impeller 34, and a resistance adjustment mechanism. A threaded ring is integrally formed on the upper outer wall of the spray cylinder 31, and the threaded ring is threadedly connected to the lower end of the longitudinal branch pipe 2. The lower side of the spray cylinder 31 is configured as a conical cylinder. High-pressure water enters the longitudinal branch pipe 2 from the transverse main pipe 1 and then sprays out from the lower end of the spray cylinder 31. A connecting ring 4 is fixed to the upper end of the support beam 32, and the connecting ring 4 is equipped with... The system has a flow opening for water to pass through. The connecting ring 4 is fixed to the inner wall of the spray cylinder 31. The top of the support beam 32 is fixed in the middle of the spray cylinder 31 and extends downward. The water-dividing cone 33 is fixed on the support beam 32 and is located directly below the spray cylinder 31. The outer diameter of the support beam is smaller than the inner diameter of the spray cylinder 31. A water-spraying gap is formed between the outer wall of the support beam 32 and the spray cylinder 31. The outer wall of the water-dividing cone 33 is designed with a gradually increasing arc. The centrifugal impeller 34 has a parabolic shape, and multiple guide ribs are distributed circumferentially on the outer wall of the water-distributing cone 33. A connecting bearing 5 is fixed in the middle of the centrifugal impeller 34. The inner ring of the connecting bearing 5 is fixed in the middle of the support beam 32, and the outer ring of the connecting bearing 5 is fixed in the middle of the centrifugal impeller 34. Several impact blades 6 are distributed circumferentially on the outer ring of the centrifugal impeller 34. The impact blades 6 are inclined and located on the outer side of the lower edge of the water-distributing cone 33. After the high-pressure water impacts the water-distributing cone 33, it forms a preliminary dispersion and slides off the outer wall of the water-distributing cone 33 and impacts the inclined impact blades 6. This causes the centrifugal impeller 34 to rotate circumferentially. The high-speed water flow, after preliminary dispersion, impacts the rotating impact blades 6. The impact blades 6, while rotating, increase the disorder of the water flow impact and can further disperse the water flow into smaller droplets. These droplets are sprayed outward at a certain initial velocity on the outer side of the centrifugal impeller 34 and fall in a parabolic line under their own gravity, forming a thin film of small water droplets.

[0026] The adjusting mechanism includes a coaxial seat 7 integrally formed on the lower side of the centrifugal impeller 34, a centrifugal slide plate 8 slidably sleeved on the support beam 32, centrifugal balls 9 disposed between the coaxial seat 7 and the centrifugal slide plate 8, and a friction ring 10 abutting against the lower side of the centrifugal slide plate 8. The coaxial seat 7 has several inclined grooves 11 distributed around its lower circumference. The top sidewall of each inclined groove 11 is an inclined surface, and the depth of each inclined groove 11 gradually decreases from the inside to the outside. The centrifugal slide plate 8 is provided with guide grooves that engage with the inclined grooves 11. The engagement of the inclined grooves 11 and the guide grooves forms a sliding space for placing the centrifugal balls 9. That is, the faster the rotation speed of the coaxial seat 7, the greater the outward centrifugal force on the centrifugal balls 9. During the outward sliding process of the centrifugal balls 9, they can push the centrifugal impeller... The centrifugal slide plate 8 slides downward, thereby causing the centrifugal slide plate 8 to abut against and push the friction ring 10. A return spring 12 is fixed to the lower side of the friction ring 10, and a positioning piece 13 is fixed to the lower end of the return spring 12. A resistance adjusting nut 14 is threadedly connected to the lower side of the outer wall of the support beam rod 32. The resistance adjusting nut 14 abuts against the lower side of the positioning piece 13. When the centrifugal slide plate 8 abuts against the friction ring 10 downward, the telescopic spring 12 will contract, thereby increasing the friction force of the friction ring 10 on the centrifugal slide plate 8. This increases the rotational resistance of the centrifugal impeller 34. That is, after the rotational resistance of the centrifugal impeller 34 is increased, the energy loss required for the water flow to hit the blades 6 and drive the centrifugal impeller 34 to rotate at high speed increases, thereby reducing the initial velocity of the small droplet spray. This allows for adjustment of the coverage area of ​​the small droplet spray.

[0027] Further configuration: the outer wall of the support beam 32 is provided with several axial grooves, and the inner wall of the friction ring 10 is provided with guide protrusions that slide and cooperate with the axial grooves. The guide protrusions can make the friction ring 10 only move up and down on the outer wall of the support beam, and cannot rotate with the centrifugal vane.

[0028] Working principle:

[0029] In this invention, high-pressure water is sprayed downwards from the spray cylinder 31 through the transverse main pipe 1 and the longitudinal branch pipe 2. After impacting the water distribution cone 33, the high-pressure water is initially dispersed. The initially dispersed water flow turns along the side wall and impacts the impact blades 6 of the centrifugal impeller 34, forming smaller droplets that are sprayed outwards and fall. The impact of the initially dispersed water flow on the impact blades 6 will drive the centrifugal impeller 34 to rotate. The water flow impacts the rotating impact blades 6, increasing the disorder of the water flow impacting the impact blades 6, which can further disperse the water flow into small droplets and spray them as a thin layer of small water droplets with a certain initial velocity. At the same time, the rotating centrifugal impeller 34 can cause the small droplets to have a certain directional deviation, which can make the small water droplets spray in different directions, improve the uniformity of the small droplet spray, and prevent the exhaust gas from escaping through the gaps between the small droplets.

[0030] In this invention, the adjustable nut 14 can be rotated to change the initial length of the telescopic spring 12, thereby changing the elastic force of the telescopic spring 12 pressing the friction ring 10, setting the initial friction force of the friction plate on the centrifugal slide plate, adjusting the rotational resistance of the centrifugal impeller 34, and changing the energy consumption of driving the centrifugal impeller 34. During the spraying process, the water flow will drive the centrifugal impeller 34 to rotate at high speed. The centrifugal force generated by the rotation will drive the centrifugal ball 9 through the inclined slide groove 11. The centrifugal ball 9 slides outward by the centrifugal force, which can push the centrifugal slide plate 8 downward to press the friction ring 10, so that the impact force of the high-pressure water and the telescopic spring 12 reach impact balance. In the above process, the coverage area of ​​the droplet spray can be changed by rotating the adjustable nut 14 while keeping the water pressure constant, so as to increase the droplet density and prevent the escape of exhaust gas.

[0031] In addition, when it is inconvenient to rotate the adjusting nut 14 after the spray tower is assembled, the water pressure of the spray water is increased, that is, the impact force of the water flow on the impeller 34 is increased, the rotation speed of the centrifugal impeller 34 is increased, and the centrifugal force of the centrifugal balls 9 is increased. This allows the centrifugal balls 9 to slide a distance in the inclined slide groove 11, increasing the friction between the friction ring 10 and the centrifugal slide plate 8, thereby increasing the rotational resistance of the centrifugal impeller 34, that is, increasing the energy loss of the water flow, and reducing the initial velocity of the droplet spray. This allows the coverage area of ​​the droplet spray to remain unchanged. That is, the coverage area remains unchanged, but the spray volume of the spray water is increased, and the number of small droplets formed increases, that is, the droplet density is increased. Changing the spray water pressure can also achieve the purpose of changing the droplet density.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tail gas treatment spray assembly, comprising a transverse main pipe and a plurality of longitudinal branch pipes interconnected therewith, characterized in that: Several nozzle mechanisms are installed on the longitudinal branch pipe. Each nozzle mechanism includes a spray cylinder, a support beam, a water-distributing cone, a centrifugal impeller, and a resistance adjustment mechanism. The spray cylinder is threaded to the lower end of the longitudinal branch pipe. The top of the support beam is fixed in the middle of the spray cylinder and extends downward. The water-distributing cone is fixed on the support beam and positioned directly below the spray cylinder. A connecting bearing is fixed in the middle of the centrifugal impeller. The inner ring of the connecting bearing is fixed in the middle of the support beam, and the outer ring of the connecting bearing is fixed in the middle of the centrifugal impeller. Several impact blades are distributed around the outer circumference of the centrifugal impeller. The impact blades are located on the outer side of the lower edge of the water-distributing cone.

2. The exhaust gas treatment spray assembly according to claim 1, characterized in that: The resistance adjustment mechanism includes a coaxial seat integrally formed on the lower side of the centrifugal impeller, a centrifugal slide plate slidably sleeved on the support beam, centrifugal balls disposed between the coaxial seat and the centrifugal slide plate, and a friction ring abutting against the lower side of the centrifugal slide plate. The lower circumference of the coaxial seat is provided with several inclined slide grooves, and the centrifugal slide plate is provided with guide slide grooves that engage with the inclined slide grooves. The inclined slide grooves and guide slide grooves engage to form a sliding space for placing the centrifugal balls.

3. The exhaust gas treatment spray assembly according to claim 2, characterized in that: The top sidewall of the inclined chute is set as an inclined surface, and the depth of the inclined chute gradually decreases from the inside to the outside.

4. The exhaust gas treatment spray assembly according to claim 3, characterized in that: A return spring is fixed to the lower side of the friction ring, and a positioning plate is fixed to the lower end of the return spring. An adjusting nut is threaded to the lower side of the outer wall of the support beam rod, and the adjusting nut abuts against the lower side of the positioning plate.

5. The exhaust gas treatment spray assembly according to claim 4, characterized in that: The outer wall of the support beam is provided with several axial grooves, and the inner wall of the friction ring is provided with guide protrusions that slide and cooperate with the axial grooves.

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