Dedusting device for desulfurization and denitrification of smelting flue gas
By introducing flow guiding components and inclined flow guiding components into the flue gas dust removal device, the problem of incomplete separation of solid impurities in the flue gas was solved, achieving efficient solid impurity separation and flue gas filtration, and ensuring subsequent desulfurization and denitrification treatment.
Patent Information
- Application Number
- CN202522480307.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-11-24
AI Technical Summary
When dusty flue gas is input into existing flue gas dust removal equipment, dust easily comes into contact with the inner wall of the pipe, resulting in poor dust removal effect. Furthermore, the lack of effective isolation measures affects the flue gas filtration effect.
A dust removal device for desulfurization and denitrification of smelting flue gas was designed. It adopts a flow guiding component and an inclined flow guiding component, including a flow guiding plate, an arc plate, a vent hole, upper and lower baffles and an inclined groove. By setting it at an inclination, the flow path of the flue gas is extended, forming multiple curved airflow paths and spiral motion, which blocks solid impurities from falling and separates them.
It effectively extends the separation time of solid impurities, improves the separation effect of solid impurities in flue gas, and ensures the continuous filtration of flue gas and the effect of subsequent desulfurization and denitrification treatment.
Smart Images
Figure CN223732427U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical flue gas dust removal technology, specifically a dust removal device for desulfurization and denitrification of smelting flue gas. Background Technology
[0002] Currently, in the process of flue gas purification in copper industry enterprises, the flue gas from the flash furnace is first cooled by a waste heat boiler to recover waste heat, and the flue gas temperature drops to 380°C. The flue gas is then further collected by an electrostatic precipitator and sent to the acid production process by a high-temperature fan. After that, the flue gas from the NGL furnace is mixed with cold air, and the flue gas temperature drops to about 350°C. After being cooled by an air cooler and collected by a bag filter, the flue gas is sent to the ring collection desulfurization treatment.
[0003] In order to improve the denitrification efficiency, the existing technology usually adds the corresponding catalyst to the exhaust gas to ensure the denitrification speed of the flue gas. However, when the exhaust gas contains a lot of dust, it will interfere with the catalytic reaction of the catalyst. Therefore, the flue gas needs to be dusted before using the catalyst in industrial production.
[0004] In actual operation, existing flue gas dust removal equipment suffers from the problem that dusty flue gas entering through the intake pipe can easily come into direct contact with the inner wall of the pipe. Furthermore, the lack of a dust-removing isolation device means that dust falling as air flows upward along the vertical pipe can still easily interfere with the subsequently input exhaust gas, affecting the device's continuous filtration and dust reduction effect on the flue gas. Utility Model Content
[0005] The purpose of this invention is to provide a dust removal device for desulfurization and denitrification of smelting flue gas, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a dust removal device for desulfurization and denitrification of smelting flue gas, comprising a main pipeline, an air inlet pipe fixedly installed on the bottom side wall of the main pipeline, an inspection door detachably installed on the top side wall of the main pipeline, a flow collector fixedly installed on the inner wall of the main pipeline, a filter cartridge detachably installed on the top of the flow collector, a baffle ring fixedly installed on the bottom inner surface of the main pipeline, and a flow guiding component provided inside the main pipeline;
[0007] The flow guiding assembly includes a fixed rod, which is fixedly installed on the inner wall of the main pipe. A flow guiding plate is fixedly installed at the end of the fixed rod, and an arc plate is fixedly installed at the bottom end of the flow guiding plate. An oblique hole is formed on the inner wall of the arc plate, and a vent hole is formed on the inner wall of the flow guiding plate. An upper baffle is fixedly installed on the top inner wall of the vent hole, and a lower baffle is fixedly installed on the bottom inner wall of the vent hole. An oblique groove is formed on the bottom side of the vent hole away from the air inlet pipe.
[0008] Preferably, the retaining ring is inclined downward on the side near the center of the main pipe so that solid impurities falling downward will not easily be blown upward.
[0009] Preferably, the guide plate is arc-shaped, and the arc-shaped opening of the guide plate is set towards the side of the air intake pipe. At the same time, the guide plate is set in an inclined shape with the top end close to the side of the air intake pipe and the bottom end far away from the side of the air intake pipe, so that the airflow blown into the main pipe through the air intake pipe can obtain a high blocking effect when it comes into contact with the surface of the guide plate and flows upward.
[0010] Preferably, the number of inclined holes is set in multiple sets, and the multiple sets of inclined holes are distributed in an arc-shaped array on the inner surface of the arc plate. The top of the inclined holes is set on the side away from the air inlet pipe, so that the flue gas input into the air inlet pipe will not be blown directly downward through the inclined holes.
[0011] Preferably, the upper baffle and the lower baffle are staggered, so that the upper baffle and the lower baffle can block the straight airflow in the vent hole and form multiple curved airflow paths inside the vent hole, reducing the impact of the fast-flowing airflow on the right side of the guide plate.
[0012] Preferably, the side of the guide plate is provided with an oblique flow guiding component, the oblique flow guiding component includes an arc strip, the arc strip is fixedly installed on the outer wall of the guide plate near the air intake pipe, and the side of the arc strip is provided with a notch.
[0013] Preferably, the number of arc strips is set to multiple sets, and the multiple sets of arc strips are evenly distributed in a linear array on the side of the guide plate, and the notches and grooves opened on the side of adjacent sets of arc strips are staggered.
[0014] Compared with the prior art, this utility model provides a dust removal device for desulfurization and denitrification of smelting flue gas, which has the following beneficial effects:
[0015] 1. This dust removal device for desulfurization and denitrification of smelting flue gas is equipped with a flow guiding component. The inclined flow guiding plate can extend the upward movement of flue gas in the main pipeline and also block the upward airflow, causing larger solid impurities in the flue gas to fall downward and detach. After passing through the vent, some air is affected by the upper and lower baffles, forming multiple curved airflow paths inside the vent, reducing the impact of the fast-flowing airflow on the right side of the flow guiding plate. This ensures that the solid impurities will not be affected by the high-speed airflow and will not be stirred up again when falling, thus guaranteeing the separation effect of solid impurities.
[0016] 2. This dust removal device for desulfurization and denitrification of smelting flue gas is equipped with an inclined flow guide component. As the flue gas input through the inlet pipe moves upward along the surface of the guide plate, it is affected by multiple sets of inclined arc strips. This causes the airflow flowing upward along the surface of the guide plate to generate a spiral movement path due to the influence of the arc strips, further extending the flow path of the airflow in the guide plate and the main pipe, thereby extending the time for solid impurities to be separated from the flue gas. At the same time, the setting of the notch groove allows the flue gas to be turbulent during flow, thereby enabling the solid impurities to be effectively separated. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0019] Figure 3 This is a side view of the guide plate structure of this utility model;
[0020] Figure 4 This is a schematic cross-sectional view of the guide plate of this utility model;
[0021] Figure 5 This utility model Figure 4 Enlarged schematic diagram of region A in the middle.
[0022] In the diagram: 1. Main pipe; 2. Inlet pipe; 3. Inspection door; 4. Filter cartridge; 5. Flow collector; 6. Baffle ring; 7. Flow guide assembly; 71. Fixing rod; 72. Flow guide plate; 73. Arc plate; 74. Inclined hole; 75. Vent hole; 76. Upper baffle; 77. Lower baffle; 78. Inclined groove; 8. Inclined flow guide assembly; 81. Arc strip; 82. Notch groove. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] like Figures 1-5As shown, this utility model provides an embodiment: a dust removal device for desulfurization and denitrification of smelting flue gas, including a main pipe 1, an air inlet pipe 2 fixedly installed on the bottom side wall of the main pipe 1, an inspection door 3 detachably installed on the top side wall of the main pipe 1, a flow collector 5 fixedly installed on the inner wall of the main pipe 1, a filter cartridge 4 detachably installed on the top of the flow collector 5, a retaining ring 6 fixedly installed on the bottom inner surface of the main pipe 1, and a flow guiding assembly 7 provided inside the main pipe 1. The flow guiding assembly 7 includes a fixed rod 71, a flow guide plate 72, an arc plate 73, an inclined hole 74, a vent hole 75, an upper baffle 76, a lower baffle 77, and an inclined groove 78.
[0025] In one embodiment of this utility model, a fixing rod 71 is fixedly installed on the inner wall of the main pipe 1, a guide plate 72 is fixedly installed at the end of the fixing rod 71, an arc plate 73 is fixedly installed at the bottom end of the guide plate 72, an inclined hole 74 is opened on the inner wall of the arc plate 73, a vent hole 75 is opened on the inner wall of the guide plate 72, an upper baffle 76 is fixedly installed on the top inner wall of the vent hole 75, a lower baffle 77 is fixedly installed on the bottom inner wall of the vent hole 75, and an inclined groove 78 is opened on the bottom side of the vent hole 75 away from the air inlet pipe 2.
[0026] Furthermore, the bottom of the hood 5 is provided with an inverted conical through hole that is narrower at the top and wider at the bottom, so that the flue gas flowing upward in the main pipe 1 can enter the filter cartridge 4 at the top of the hood 5 for secondary filtration, ensuring the filtration effect of the device on solid impurities in the flue gas, and thus ensuring the subsequent desulfurization and denitrification treatment effect of the smelting flue gas. At the same time, the baffle ring 6 is set with a downward inclination on the side near the center of the main pipe 1, with an inclination angle of about 5-10°, so that the downward falling solid impurities will not easily blow back upward, ensuring the separation effect of solid particulate impurities in the smelting flue gas. Specifically, in the actual production process, a receiving device is set at the bottom of the main pipe 1 to collect the separated solid impurities for centralized processing.
[0027] Meanwhile, the upper fixing rod 71 is longer than the lower fixing rod 71 and is fixedly welded between the inner wall of the main pipe 1 and the guide plate 72. The guide plate 72 is arc-shaped, and the arc-shaped opening of the guide plate 72 is set towards the side of the air inlet pipe 2. At the same time, the guide plate 72 is set with its top end close to the side of the air inlet pipe 2 and its bottom end away from the side of the air inlet pipe 2, with a slight inclination of about 5-10°. This allows the airflow blown into the main pipe 1 through the air inlet pipe 2 to obtain a high blocking effect as it contacts the surface of the guide plate 72 and flows upward, further increasing the airflow. The contact area between the guide plate 72 and the air intake pipe 2 is designed to facilitate the downward fall and detachment of larger solid impurities. Specifically, the arc-shaped recess of the arc plate 73 is positioned towards the side of the air intake pipe 2, and multiple sets of inclined holes 74 are provided. These multiple sets of inclined holes 74 are distributed in an arc-shaped array on the inner surface of the arc plate 73. It is worth noting that the top of the inclined holes 74 is positioned away from the side of the air intake pipe 2, so that the flue gas input into the air intake pipe 2 will not be directly blown downward through the inclined holes 74. At the same time, the inclined holes 74 can also discharge solid impurities falling downward along the surface of the guide plate 72, thereby achieving solid-gas separation.
[0028] Specifically, multiple sets of vent holes 75 are arranged in a matrix array inside the guide plate 72. At the same time, the upper baffle 76 and the lower baffle 77 are staggered, so that the upper baffle 76 and the lower baffle 77 can block the straight airflow inside the vent holes 75, forming multiple curved airflow paths inside the vent holes 75. This reduces the impact of the fast-flowing airflow on the right side of the guide plate 72, so that solid impurities will not be affected by the high-speed airflow and will not be stirred up again when falling. Furthermore, the inclined groove 78 allows the solid impurities blocked by the lower baffle 77 to fall downwards under the action of gravity, which facilitates the discharge and collection of solid impurities.
[0029] In addition, the side of the guide plate 72 is provided with an oblique flow guiding component 8, which includes an arc strip 81. The arc strip 81 is fixedly installed on the outer wall of the guide plate 72 near the air intake pipe 2, and a notch 82 is provided on the side of the arc strip 81.
[0030] In the embodiments of this utility model, multiple sets of arc strips 81 are arranged in a linear array and evenly distributed on the side of the guide plate 72. The notches 82 opened on the side of adjacent sets of arc strips 81 are staggered. Specifically, the arc strips 81 are inclined so that the airflow flowing upward along the surface of the guide plate 72 will be affected by the arc strips 81 and generate a spiral motion path, further extending the flow path of the airflow in the guide plate 72 and the main pipe 1, so as to extend the time for solid impurities to be separated from the flue gas, ensuring that the solid impurities in the flue gas can be effectively separated. Furthermore, the notches 82 have a certain turbulence effect on the flowing flue gas, improving the solid impurity separation effect of the flue gas.
[0031] In this invention, during use, smelting flue gas is introduced into the main pipe 1 from the inlet pipe 2. The smelting flue gas first contacts the guide plate 72 and moves upward along the inclined guide plate 72. During the upward movement, it is affected by the multiple sets of inclined arc strips 81, causing the airflow flowing upward along the surface of the guide plate 72 to generate a spiral movement path, further extending the flow path of the airflow in the guide plate 72 and the main pipe 1, so as to prolong the time for solid impurities to be separated from the flue gas. At the same time, with the setting of the notch 82, the flue gas can be turbulent during flow, thereby enabling the solid impurities to be effectively separated. After passing through the vent hole 75, some air is affected by the upper baffle 76 and the lower baffle 77, forming multiple curved airflow paths inside the vent hole 75, reducing the impact of the fast-flowing airflow on the right side area of the guide plate 72, so that the solid impurities will not be affected by the high-speed airflow and will not be stirred up again when falling, thus ensuring the separation effect of solid impurities.
[0032] After separation, the flue gas moves upward through the collector hood 5 and passes through the filter cartridge 4. After secondary filtration in the filter cartridge 4, it is input into the desulfurization and denitrification equipment through the top of the main pipeline 1 for desulfurization and denitrification processing of the flue gas.
[0033] The foregoing description provides a general overview of this utility model. However, modifications and improvements can be made to it, which will be apparent to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit and intent of this utility model are within its protection scope.
Claims
1. A dust removal device for desulfurization and denitrification of smelting flue gas, comprising a main pipe (1), an inlet pipe (2) fixedly installed on the bottom side wall of the main pipe (1), an inspection door (3) detachably installed on the top side wall of the main pipe (1), a flow collector (5) fixedly installed on the inner wall of the main pipe (1), a filter cartridge (4) detachably installed on the top of the flow collector (5), and a retaining ring (6) fixedly installed on the bottom inner surface of the main pipe (1), characterized in that: The inner part of the main pipeline (1) is provided with a flow guide assembly (7); The flow guide assembly (7) includes a fixed rod (71) fixedly installed on the inner wall of the main pipeline (1), the end of the fixed rod (71) is fixedly installed with a flow guide plate (72), the bottom end of the flow guide plate (72) is fixedly installed with an arc plate (73), the inner wall of the arc plate (73) is provided with an inclined hole (74), the inner wall of the flow guide plate (72) is provided with a ventilation hole (75), the top inner wall of the ventilation hole (75) is fixedly installed with an upper baffle (76), the bottom inner wall of the ventilation hole (75) is fixedly installed with a lower baffle (77), and the ventilation hole (75) is provided with an inclined groove (78) on the bottom away from the air inlet pipe (2).
2. The dust removal device for smelting flue gas desulfurization and denitrification according to claim 1, characterized in that: The stop ring (6) is arranged in a downward inclined manner near the center side of the main pipeline (1).
3. The dust removal device for smelting flue gas desulfurization and denitrification according to claim 1, characterized in that: The flow guide plate (72) is in a circular arc shape, and the circular arc opening of the flow guide plate (72) is arranged towards the air inlet pipe (2) side, and the flow guide plate (72) is arranged in an inclined manner with the top end close to the air inlet pipe (2) side and the bottom end away from the air inlet pipe (2) side.
4. The dust removal device for smelting flue gas desulfurization and denitrification according to claim 1, characterized in that: The inclined holes (74) are arranged in multiple groups, and the multiple groups of inclined holes (74) are arranged in an arc array on the inner surface of the arc plate (73), and the top end of the inclined hole (74) is arranged away from the air inlet pipe (2) side.
5. The dedusting device for smelting flue gas desulfurization and denitrification according to claim 1, characterized in that: The upper baffle (76) and the lower baffle (77) are arranged in an interleaved manner.
6. The dust removal device for smelting flue gas desulfurization and denitrification according to claim 1, characterized in that: The side surface of the flow guide plate (72) is provided with a diagonal drainage assembly (8), the diagonal drainage assembly (8) includes an arc strip (81), the arc strip (81) is fixedly installed on the outer wall of the flow guide plate (72) close to the air inlet pipe (2) side, and the side surface of the arc strip (81) is provided with a notched groove (82).
7. The dust removal device for smelting flue gas desulfurization and denitrification according to claim 6, characterized in that: The number of arc strips (81) is arranged in multiple groups, and the multiple groups of arc strips (81) are arranged in a linear array on the side surface of the flow guide plate (72) and are arranged in a staggered manner.