Circulating air volume self-adaptive control efficient dust removal device

Abstract

To provide a circulating air volume self-adaptive control efficient dust removal device.SOLUTION: A circulating air volume self-adaptive control efficient dust removal device comprises a multi-cyclones, a plurality of chambers are formed in the multi-cyclones, are arranged side by side and are parallel to the airflow direction, an inlet regulating valve 5 is arranged at the air inlet end of each chamber, and an outlet regulating valve 7 is arranged at the air outlet end of each chamber; the inlet regulating valve 5 is electrically connected with an inlet actuator 4, and the outlet regulating valve 7 is electrically connected with an outlet regulator; an anemometer 2 is arranged on an air intake duct of the multi-cyclone and is used for monitoring the air speed of flue gas in the air intake duct; the anemometer 2, the inlet regulator and the outlet regulator are all electrically connected with a control center 3, and the anemometer 2 transmits wind speed data to the control center 3; wherein the control center 3 controls the inlet regulating valve 5 through the inlet regulator and controls the outlet regulating valve 7 through the outlet regulator according to the obtained wind speed data, so that the opening degrees of the multiple chambers are regulated respectively.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of dust removal technology in the metallurgical industry, and in particular to a highly efficient dust removal device with adaptive control of circulating air volume. [Background technology]

[0002] The steel sintering process generates a large amount of exhaust gas, resulting in high pollution control costs. Using exhaust gas recirculation technology allows for the recycling of some of the exhaust gas, thereby reducing the amount of exhaust gas handled by pollutant treatment equipment and lowering pollution prevention costs. Dust removal from the circulating exhaust gas is essential. Removing large particles protects the fan impeller and reduces wear and tear, requiring a dust removal efficiency of 80% or higher. Reducing the return of fine dust to the sintered material surface and preventing it from blocking the pores on the material surface and affecting production requires a higher dust removal efficiency. Taking these requirements into consideration, multi-cyclone systems are typically used for exhaust gas recirculation. These systems offer low operating costs, stable maintenance, and easy maintenance. Their design dust removal efficiency is typically between 80% and 95%, and they can withstand high temperatures of 200°C and 350°C. They are therefore the optimal dust removal solution for exhaust gas recirculation systems.

[0003] The dust removal efficiency of a multi-cyclone is affected by the filtering air speed. Within the design air speed range, the dust collector cyclone can achieve high dust removal efficiency, but below the design air speed, the cyclone cannot efficiently capture fine particles, resulting in a decrease in dust removal efficiency. The exhaust gas circulation system is affected by fluctuations in sinter production, and because the air volume fluctuates greatly, the multi-cyclone cannot remain within the efficient dust removal range for a long time, which is likely to damage the fan impeller and affect sinter production.

[0004] Common solutions to the above problems include connecting multiple dust collectors in series, such as gravity dust removal + multi-cyclone dust removal or cyclone dust collector + multi-cyclone dust removal. Connecting multiple dust collectors in series can improve dust removal efficiency to a certain extent, but it also increases investment costs and installation space. Another idea is to increase the inlet air volume by supplementing with air or recycled exhaust gas after dust removal to match the designed filtration air velocity. This solution reduces the exhaust gas circulation rate and causes some of the recycled exhaust gas to run idle, wasting energy. Therefore, there is an urgent need to develop a low-cost, efficient dust removal system that can adapt to fluctuations in circulation air volume. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION The object of the present invention is to provide a highly efficient dust removal device with adaptive control of circulating air volume in order to solve the problems of the prior art. [Means for solving the problem]

[0006] To achieve the above object, the present invention provides the following scheme: The present invention provides a highly efficient dust removal device with adaptive control of circulating air volume, a multi-cyclone having a plurality of chambers provided therein, the plurality of chambers being arranged side by side and parallel to the airflow direction, the chambers being provided with inlet control valves at their intake ends, outlet control valves at their exhaust ends, the inlet control valves being electrically connected to an inlet actuator, and the outlet control valves being electrically connected to an outlet adjuster; an anemometer provided in an intake duct of the multi-cyclone for monitoring the wind speed of the exhaust gas in the intake duct; a control center, wherein the anemometer, the inlet adjuster, and the outlet adjuster are all electrically connected to the control center, and the anemometer transmits wind speed data to the control center; Here, the control center controls the inlet control valves via the inlet adjusters and the outlet control valves via the outlet adjusters based on the obtained wind speed data so as to adjust the opening degrees of each of the plurality of chambers.

[0007] Preferably, the inlet control valve comprises: a plurality of valve plates spaced apart, the chambers communicating with the spaces and allowing exhaust gas to pass through the spaces into the chambers; a spindle, wherein the spindle is provided at each of the axial positions of the plurality of valve plates, and the rotary shaft is used to rotate the valve plates, and the rotary shaft is electrically connected to the inlet actuator; where: A guide hole group consisting of a plurality of guide holes is formed on the inner side of the valve plates located at both ends, The guide hole groups are opened on both sides of the centrally located valve plate, and the guide holes on two adjacent guide hole groups are arranged asymmetrically so that the chamber is closed when the two adjacent valve plates abut.

[0008] Preferably, the cross section of the guide hole is set to be circular.

[0009] Preferably, the valve plate has an opening rate of 30% to 50%.

[0010] Preferably, the length of said valve plate is twice the shaft distance between two of said spindles.

[0011] Preferably, the anemometer is located in a straight section of the intake duct.

[0012] Preferably, the monitoring end of the anemometer is on the axis of the intake duct.

[0013] Preferably, the inlet control valve has the same structure as the outlet control valve. [Effects of the Invention]

[0014] The present invention discloses the following technical effects.

[0015] The dust removal device can be adaptively controlled according to the air volume, ensuring that the dust removal efficiency of the circulating exhaust gas remains stable at over 98% for a long period of time, reducing system resistance, extending the life of the circulating system fan by 40%, and saving energy by over 5%. The device also has the characteristics of a small installation area and low investment and operating costs. [Brief explanation of the drawings]

[0016] In the following, in order to more clearly explain the embodiments of the present invention or the technical scheme in the prior art, the drawings necessary for the embodiments will be briefly described. However, the drawings in the following description are only some embodiments of the present invention, and it is obvious that those skilled in the art can obtain other drawings based on these drawings without exerting creative efforts. [Figure 1] 1 is a structural schematic diagram of a highly efficient dust removal device with adaptive circulating air volume control according to the present invention; [Figure 2] 1 is a schematic diagram of the structure of a multi-cyclone according to the present invention. [Figure 3] FIG. 2 is a plan view of the inlet control valve of the present invention in an open state. [Figure 4] FIG. 2 is a front view of the inlet control valve of the present invention in an open state. [Figure 5] FIG. 2 is a plan view of the inlet control valve of the present invention in a closed state. [Figure 6] FIG. 2 is a front view of the inlet control valve of the present invention in a closed state. DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with accompanying drawings, but it is clear that the described embodiments are only a part of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be described in more detail below in conjunction with the drawings and specific embodiments.

[0019] Referring to FIGS. 1 to 6, the present invention provides a highly efficient dust removal device with adaptive control of circulating air volume, a multi-cyclone 1 having a plurality of chambers arranged side by side and parallel to the airflow direction, an inlet control valve 5 at the intake end of each chamber, an outlet control valve 7 at the exhaust end of each chamber, an inlet actuator 4 electrically connected to the inlet control valve 5, and an outlet adjuster electrically connected to the outlet control valve 7; an anemometer 2 provided in the intake duct of the multi-cyclone 1 for monitoring the wind speed of the exhaust gas in the intake duct; a control center 3, wherein the anemometer 2, the inlet regulator and the outlet regulator are all electrically connected to the control center 3, and the anemometer 2 transmits wind speed data to the control center 3; Here, the control center 3 controls the inlet control valve 5 via the inlet adjuster and the outlet control valve 7 via the outlet adjuster based on the obtained wind speed data so as to adjust the opening degree of each of the multiple chambers.

[0020] To address the problem of reduced dust removal efficiency in multi-cyclones due to fluctuations in circulating air volume, the present invention proposes partitioning the interior of the multi-cyclone and controlling the inlet control valve 5 and outlet control valve 7 in real time in response to changes in air speed to adjust the amount of air entering each chamber. By optimizing the structure of the valve plate 8, dust removal efficiency can be kept high and stable.

[0021] Multi-cyclone 1 is divided into multiple chambers according to the airflow fluctuation range and operating load. An anemometer 2 is installed in the intake duct of multi-cyclone 1 to detect changes in inlet air speed in real time. The test results from anemometer 2 are connected to control center 3, which then predicts dust removal efficiency in real time based on changes in wind speed and controls inlet actuator 4 and outlet actuator 6. Inlet actuator 4 and outlet actuator 6 synchronously control inlet control valve 5 and outlet control valve 7 to direct the circulating exhaust gas to different chambers. When the circulating airflow increases, the multiple chambers are automatically opened, allowing the dust-laden exhaust gas to flow through valve plate 8 at the inlet end and enter the corresponding chamber through guide hole 9. The valve plate 8 and guide hole 9 work together to change the airflow path. Because dust has a much greater inertia than gas, dust particles are separated from the airflow, achieving a primary dust removal efficiency of over 40%. The airflow then enters the cyclone dust removal chambers, reducing the filtering air speed of each chamber and ensuring that the overall filtering air speed is within the optimal design range, thereby achieving a secondary dust removal efficiency of over 80%, an overall dust removal efficiency of over 98%, and reducing system resistance.When the circulating air volume decreases, multiple chambers are automatically closed, increasing the filtering air speed of each chamber and keeping it within the optimal design range, ensuring overall dust removal efficiency.

[0022] In a further optimized scheme, the inlet control valve 5 is a plurality of valve plates 8 spaced apart, the chambers communicating with the spaces and allowing exhaust gas to pass through the spaces into the chambers; a spindle 10, the spindle 10 being provided at each of the axial positions of the plurality of valve plates 8, the rotating shaft being used to rotate and drive the valve plates 8, the rotating shaft being electrically connected to the inlet actuator 4; where: A guide hole group consisting of a plurality of guide holes is formed on the inner side of the valve plates 8 located at both ends, A guide hole group is opened on each side of the centrally located valve plate 8, and the guide holes 9 above two adjacent guide hole groups are arranged asymmetrically so that the chamber is closed when the two adjacent valve plates 8 abut.

[0023] The control center 3 is a logic unit for adaptive airflow control, and its role is to control logic input, record inlet airflow, and automatically provide feedback to control the inlet control valve 5 and outlet control valve 7. The control center 3 is connected to the anemometer 2, inlet actuator 4, and outlet actuator 6 via signal lines.

[0024] The inlet actuator 4 and outlet actuator 6 are actuator units for valve adjustment. They receive control signals from the control center 3 and adjust the opening degree of the inlet control valve 5 and outlet control valve 7 via a mechanical transmission shaft. The opening angle of the inlet control valve 5 is determined according to the position of the partition, and the angle is between 25° and 55°.

[0025] The inlet control valve 5 and the outlet control valve 7 are connected to the actuator via a mechanical transmission shaft, and the opening degree is controlled according to the operating state of the actuator.

[0026] The air volume adaptive control operation logic is determined according to the inlet air speed offset (x), and the opening of the inlet control valve 5 and outlet control valve 7 is y = ax + b, where a and b are equipment correction coefficients related to the equipment size, design parameters, operating negative pressure, etc.

[0027] In a further optimized scheme, the cross section of the guide hole 9 is set to be circular.

[0028] In a further optimized scheme, the open area ratio of the valve plate 8 is 30% to 50%.

[0029] In a further optimized scheme, the length of the valve plate 8 is twice the shaft distance between the two spindles 10 .

[0030] In a further optimized scheme, the anemometer 2 is located in the straight section of the intake duct.

[0031] In a further optimized scheme, the monitoring end of the anemometer 2 is located on the axis of the intake duct and connected to the control center 3 via a signal line, and feeds back the exhaust gas flow velocity to the control center 3 in real time.

[0032] In a further optimized scheme, the inlet control valve 5 is of the same structure as the outlet control valve 7 .

[0033] The actual situation of the present invention is as follows.

[0034] Multi-cyclone 1 is divided into four chambers by partitions based on the airflow fluctuation range and operating load, and is named chambers 1 through 4 from top to bottom. An anemometer 2 is installed in the intake duct of multi-cyclone 1 to detect changes in inlet air speed in real time. The anemometer 2 test results are transmitted to a computer in control center 3, which then predicts dust removal efficiency in real time based on the inlet air speed and controls inlet actuator 4 and outlet actuator 6. The inlet actuator 4 and outlet actuator 6 synchronize with each other to control inlet control valve 5 and outlet control valve 7, directing the circulating exhaust gas to the different chambers. Chambers 1 through 3 are open during normal operation, with the filtration air speed of each chamber below 20 m / s. When anemometer 2 detects an increase in the circulating air volume, control center 3 controls the operation period to open inlet control valve 5 and outlet control valve 7 of chamber 4, reducing the filtration air speed of each chamber. This ensures the overall filtration air speed is between 10 and 20 m / s, achieving a dust removal efficiency of over 95%. When the circulating air volume decreases, the first chamber is automatically closed, increasing the filtering air velocity of the single partition to 10 m / s, ensuring a dust removal efficiency of over 98%.

[0035] Orientations or positional relationships indicated by "front," "back," "left," "right," "vertical," "horizontal," "up," "down," "inside," "outside," etc. are based on the orientations or positional relationships shown in the drawings and are intended only to facilitate description of the invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be configured, or operate in a particular orientation, and therefore should not be understood as limiting the invention.

[0036] The above examples merely illustrate preferred embodiments of the present invention and do not limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical scheme of the present invention without departing from the design spirit of the present invention should be included in the scope of protection defined by the claims of the present invention. [Explanation of symbols]

[0037] 1 Multi-Cyclone 2 Anemometer 3. Control Center 4 Inlet Actuator 5 Inlet control valve 6 Outlet Actuator 7 Outlet control valve 8 Valve Plate 9 Guide hole 10 spindles

Claims

1. a multi-cyclone (1) having a plurality of chambers provided therein, the chambers being arranged side by side and parallel to the airflow direction, with inlet control valves (5) provided at the intake ends of the chambers and outlet control valves (7) provided at the exhaust ends of the chambers, with an inlet actuator (4) electrically connected to the inlet control valves (5) and an outlet adjuster electrically connected to the outlet control valves (7); an anemometer (2) provided in the intake duct of the multi-cyclone (1) for monitoring the wind speed of the exhaust gas in the intake duct; a control center (3), wherein the anemometer (2), the inlet actuator (4) and the outlet adjuster are all electrically connected to the control center (3), and the anemometer (2) transmits wind speed data to the control center (3); Here, the control center (3) controls the inlet control valve (5) via the inlet actuator (4) and the outlet control valve (7) via the outlet adjuster based on the obtained wind speed data so as to adjust the opening degree of each of the plurality of chambers, and the inlet control valve (5) a plurality of valve plates (8) spaced apart, the chambers communicating with the spaces and allowing exhaust gas to pass through the spaces into the chambers; a spindle (10), wherein the spindle (10) is provided at each of the axial positions of the plurality of valve plates (8), the spindle (10) is used to rotate the valve plates (8), and the spindle (10) is electrically connected to the inlet actuator (4); Here, guide hole groups consisting of a plurality of guide holes (9) are opened on the inside of the valve plates (8) located at both ends, The highly efficient dust removal device with adaptive circulation air volume control is characterized in that the guide hole groups are opened on both sides of the centrally located valve plate (8), and the guide holes (9) on two adjacent guide hole groups are asymmetrically arranged so that the chamber is closed when the two adjacent valve plates (8) abut against each other.

2. 2. The highly efficient dust remover with adaptive circulation air volume control according to claim 1, wherein the cross section of the guide hole (9) is set to be circular.

3. 2. The highly efficient dust removal device with adaptive circulation air volume control according to claim 1, wherein the aperture ratio of the valve plate (8) is 30% to 50%.

4. 2. The highly efficient dust removal device with adaptive circulation air volume control as claimed in claim 1, wherein the length of the valve plate (8) is twice the shaft distance between the two spindles (10).

5. 2. The highly efficient dust removal device with adaptive circulation air volume control according to claim 1, wherein the anemometer (2) is located in a straight pipe section of the intake duct.

6. 2. The highly efficient dust removal device with adaptive circulation air volume control according to claim 1, wherein the monitoring end of the anemometer (2) is located on the axis of the intake duct.

7. 2. The highly efficient dust removal device with adaptive circulation air volume control according to claim 1, wherein the inlet control valve (5) has the same structure as the outlet control valve (7).

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