Highly efficient dust removal device with adaptive control of circulating air volume

Abstract

Provides a highly efficient dust removal device with adaptive control of circulating air volume. [Solution] The system includes a multi-cyclone having a plurality of chambers therein, the plurality of chambers are arranged side by side and parallel to the airflow direction, an inlet control valve 5 is provided at the intake end of the chamber, an outlet control valve 7 is provided at the exhaust end of the chamber, an inlet actuator 4 is electrically connected to the inlet control valve 5, and an outlet adjuster is electrically connected to the outlet control valve 7, an anemometer 2 is provided in the intake duct of the multi-cyclone to monitor the wind speed of the exhaust gas in the intake duct, the anemometer 2, the inlet adjuster and the outlet adjuster are all electrically connected to a control center 3, the anemometer 2 transfers the wind speed data to the control center 3, wherein 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 to adjust the opening degree of the plurality of chambers respectively.

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 amount of exhaust gas in the steel sintering process is huge, and the cost of pollution control is high. By adopting exhaust gas circulation technology, it is possible to realize the recycling of part of the exhaust gas, thereby reducing the amount of exhaust gas handled by the pollutant treatment equipment and reducing the pollution prevention cost. It is necessary to remove the dust in the circulating exhaust gas during the exhaust gas circulation. On the one hand, it is necessary to remove large particles to protect the fan impeller and reduce wear and damage, and the dust removal efficiency is required to be 80% or more. On the other hand, it is necessary to reduce the return of fine dust to the sintered material surface, and prevent the fine dust from blocking the pores on the material surface and affecting production, and the higher the dust removal efficiency, the better. Taking into consideration the above requirements, multi-cyclone is usually selected in the exhaust gas circulation, which has low operating costs, stable and easy maintenance, the design dust removal efficiency is generally between 80% and 95%, and can withstand the high temperature of 200℃ to 350℃ of the circulating exhaust gas, which is the optimal dust removal method for the exhaust gas circulation system.

[0003] The dust removal efficiency of the multi-cyclone is affected by the filtering air speed. Within the range of the designed air speed, the dust collector cyclone can achieve high dust removal efficiency, but below the designed air speed, the cyclone cannot efficiently capture fine particles, and the dust removal efficiency decreases. The exhaust gas circulation system is affected by the fluctuation of sintering production, and the fluctuation of the air volume is large, so the multi-cyclone cannot be stabilized within the efficient dust removal range for a long time, which is easy to damage the fan impeller and affect the sintering production.

[0004] Common solutions to the above problems include connecting multiple dust collectors in series, such as gravity dust removal + multi-cyclone dust removal, cyclone dust collector + multi-cyclone dust removal. Connecting multiple dust collectors in series can increase the dust removal efficiency to a certain extent, but at the same time it increases the investment cost and the installation area. Another idea is to increase the inlet air volume to match the designed filtration air speed by replenishing air or circulating flue gas after dust removal. This solution reduces the circulation rate of the flue gas, while at the same time causing some of the circulating flue gas to spin idly, wasting energy. Therefore, there is an urgent need to develop a low-cost and efficient dust removal device that can adapt to fluctuations in the circulation air volume. Summary of the Invention [Problem to be solved by the invention]

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

[0006] In order 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 therein, the plurality of chambers being arranged side by side and parallel to an airflow direction, an inlet control valve being provided at an intake end of the chamber, an outlet control valve being provided at an exhaust end of the chamber, an inlet actuator being electrically connected to the inlet control valve, and an outlet adjuster being electrically connected to the outlet control valve; 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 valve via the inlet adjuster and the outlet control valve 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.

[0007] Preferably, the inlet regulating 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, the spindle being provided at each of the axial positions of the plurality of valve plates, the rotating shaft being used to rotate the valve plates, the rotating shaft being electrically connected to the inlet actuator, Where: A guide hole group consisting of a plurality of guide holes is opened on the inner side of the valve plate 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 asymmetrically arranged so that the chamber is closed when the two adjacent valve plates abut against each other.

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

[0009] Preferably, the aperture ratio of the valve plate is 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 is of the same construction as the outlet control valve. Effect 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, the dust removal efficiency of the circulating exhaust gas can be stable at more than 98% for a long time, the system resistance can be reduced, the life of the fan of the circulating system can be improved by 40%, and energy can be saved by more than 5%. In addition, the device has the characteristics of small installation area, low investment and operating costs. [Brief description 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 schematic diagram showing the structure of a highly efficient dust removal device with adaptive circulating air volume control according to the present invention; [Diagram 2] FIG. 2 is a schematic diagram of the structure of a multi-cyclone according to the present invention. [Diagram 3] FIG. 2 is a plan view of the inlet control valve in an open state according to the present invention. [Figure 4] FIG. 2 is a front view of the inlet control valve in an open state according to the present invention. [Diagram 5] FIG. 2 is a plan view of the inlet control valve in the present invention in a closed state. [Figure 6] FIG. 2 is a front view of the inlet control valve in the present invention in a closed state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The technical solutions in the embodiments of the present invention will be described below clearly and completely with the accompanying drawings, but it is clear that the described embodiments are only some 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 creative labor belong to 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] 1 to 6, the present invention provides a highly efficient dust removing device with adaptive control of circulating air volume, A multi-cyclone 1 having a plurality of chambers therein, the plurality of chambers being arranged side by side and parallel to the airflow direction, an inlet control valve 5 being provided at an intake end of the chamber, an outlet control valve 7 being provided at an exhaust end of the chamber, an inlet actuator 4 being electrically connected to the inlet control valve 5, and an outlet adjuster being electrically connected to the outlet control valve 7; an anemometer 2 provided in an intake duct of the multi-cyclone 1 for monitoring the wind speed of the exhaust gas in the intake duct; and a control center 3, in which 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] In response to the problem of reduced dust removal efficiency of the multi-cyclone due to fluctuations in the circulating air volume, the present invention proposes partitioning the inside of the multi-cyclone, controlling the inlet control valve 5 and the outlet control valve 7 in real time according to changes in the wind speed, adjusting the amount of air entering different chambers, and optimizing the structure of the valve plate 8 to achieve high and stable dust removal efficiency.

[0021] The multi-cyclone 1 is divided into multiple chambers according to the air volume fluctuation range and operating load, and the change in the inlet air speed is detected in real time by installing an anemometer 2 in the intake duct of the multi-cyclone 1. The test result of the anemometer 2 is connected to the control center 3, which predicts the dust removal efficiency in real time according to the change in the wind speed and controls the inlet actuator 4 and the outlet actuator 6. The inlet actuator 4 and the outlet actuator 6 synchronously control the inlet control valve 5 and the outlet control valve 7 to direct the circulating exhaust gas into different chambers. When the circulating air volume increases, the multiple chambers are opened by automatic control, and the dust-containing exhaust gas flows through the valve plate 8 at the inlet end and enters the corresponding chamber through the guide hole 9. The airflow changes its path through the joint action of the valve plate 8 and the guide hole 9, and because the inertia force of dust is much larger than that of gas, the dust particles are separated from the airflow, and the primary dust removal efficiency of more than 40% can be achieved. The airflow further enters the cyclone dust removal chamber, reducing the filtering air speed of each chamber and ensuring that the overall filtering air speed is within the optimal range of the design, thereby achieving a secondary dust removal efficiency of 80% or more, an overall dust removal efficiency of 98% or more, and reducing the system resistance.When the circulating air volume decreases, multiple chambers are automatically closed, increasing the filtering air speed of each chamber and controlling it within the optimal range of the design, ensuring the overall dust removal efficiency.

[0022] In a further optimized scheme, the inlet control valve 5 is a plurality of valve plates 8 spaced apart from one another, the chambers communicating with the spaces and allowing exhaust gas to pass through the spaces into the chambers; The spindle 10 is provided at each of the axial positions of the valve plates 8, and the rotating shaft is used to rotate the valve plates 8, and the rotating shaft is 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 provided on each side of the centrally located valve plate 8, and the guide holes 9 above the two adjacent guide hole groups are arranged asymmetrically so that the chamber is closed when the two adjacent valve plates 8 abut against each other.

[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 the outlet actuator 6 are actuator units for valve adjustment. It receives control signals from the control center 3 and adjusts the opening degree of the inlet control valve 5 and the outlet control valve 7 through 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 25°~55°.

[0025] The inlet control valve 5 and the outlet control valve 7 are connected to an actuator via a mechanical transmission shaft, and realize the control of the opening degree 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 amount (x), and the opening degree of the inlet control valve 5 and the 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 between 30% and 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 a 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 practical situation of the present invention is as follows.

[0034] The multi-cyclone 1 is divided into four chambers by a partition plate according to the fluctuation range of the air volume and the operating load, and is named the first to fourth chambers from top to bottom. An anemometer 2 is installed in the intake duct of the multi-cyclone 1 to detect the change in the inlet air speed in real time. The test result of the anemometer 2 is transferred to the computer of the control center 3, and the control center 3 predicts the dust removal efficiency in real time based on the inlet air speed and controls the inlet actuator 4 and the outlet actuator 6. The inlet actuator 4 and the outlet actuator 6 synchronously control the inlet control valve 5 and the outlet control valve 7 to lead the circulating exhaust gas to different chambers. The first to third chambers are opened during normal operation, and the filtration air speed of each chamber is below 20m / s. When the anemometer 2 detects an increase in the circulating air volume, the control center 3 controls the execution period to open the inlet control valve 5 and the outlet control valve 7 of the fourth chamber, reducing the filtration air speed of a single chamber, ensuring that the overall filtration air speed is 10 to 20m / s, and achieving a dust removal efficiency of more than 95%. When the circulating air volume decreases, the first chamber is closed through automatic control, increasing the filtering air speed of a single partition to 10m / s, ensuring dust removal efficiency of more than 98%.

[0035] Orientations or positions indicated by "front", "back", "left", "right", "vertical", "horizontal", "up", "down", "inside", "outside", etc. are based on the orientations or positions 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 have a particular orientation or must be configured or operated in a particular orientation, and therefore should not be understood as limiting the invention.

[0036] The above embodiments merely describe 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 Exit Actuator 7 Outlet control valve 8 Valve Plate 9 Guide hole 10 Spindle

Claims

1. a multi-cyclone (1) having a plurality of chambers therein, the plurality of chambers being arranged side by side and parallel to an airflow direction, an inlet control valve (5) being provided at an intake end of the chamber, an outlet control valve (7) being provided at an exhaust end of the chamber, an inlet actuator (4) being electrically connected to the inlet control valve (5), and an outlet adjuster being electrically connected to the outlet control valve (7); an anemometer (2) provided in an 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 adjustment valve (5) via the inlet actuator (4) and controls the outlet adjustment valve (7) via an outlet adjuster based on the obtained wind speed data so as to adjust the opening degree of each of the multiple chambers, and the inlet adjustment valve (5) a plurality of valve plates (8) spaced apart from one another, the chambers communicating with the spaces and allowing exhaust gas to pass through the spaces into the chambers; a spindle (10), 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 inner side of the valve plates (8) located at both ends, a guide hole group is provided on each side 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) come into contact with each other.

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

4. 2. The highly efficient dust removing 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 removing device with adaptive circulation air volume control as claimed in claim 1, wherein the anemometer (2) is located in a straight pipe section of the intake duct.

6. 2. The highly efficient dust removing apparatus with adaptive circulation air volume control as claimed in claim 1, wherein the monitoring end of said anemometer (2) is located on the axis of said intake duct.

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

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