A sintering machine air box with automatic gas-material separation

Abstract

This utility model relates to a sintering machine bellows with automatic gas-material separation, applied in the field of sintering technology. It solves the problem that existing exhaust components are easily blocked by sintering materials, affecting the exhaust volume of the bellows and thus the sintering quality of the sintered materials. It includes a bellows body, an exhaust component, a material guiding component, and an adjusting component. An exhaust port is provided on the side of the bellows body, and a material guiding port is provided at the bottom of the bellows body. The exhaust component includes an exhaust pipe and an electric control valve. The exhaust pipe's inlet is connected to the exhaust port. The material guiding component includes a material guiding pipe and a double-layer ash discharge valve installed on the material guiding pipe. The material guiding pipe's inlet is connected to the material guiding port. The adjusting component includes a pressure detector and a control component. The signal output terminal of the pressure detector is connected to the signal receiving terminal of the control component. It effectively separates gas and materials, reduces internal ash accumulation, and precisely controls the airflow and negative pressure state of the sintering machine bellows during operation, thereby improving sintering quality.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a sintering machine air box with automatic gas-material separation. Background Technology

[0002] In the sintering process, ignition and ventilation are crucial control steps. This involves adjusting the valve opening of the lower air box of the igniter to direct the heat generated by the combustion of the igniter gas through the air box, igniting the material at the igniter's feed surface and continuing combustion downwards to achieve the ignition and sintering objective. Uniform airflow and temperature are key factors in ensuring the quality of the sintered ore. To avoid the various cost losses incurred by the company due to equipment failure and downtime, stable operation of the sintering machine is essential.

[0003] The existing patent publication number "CN11412750B" discloses a negative pressure control device for a sintering machine wind box, including a partition plate disposed between two adjacent wind boxes and a pressure-reducing assembly disposed on a branch pipe of the sintering machine wind box. The device is characterized in that the pressure-reducing assembly is correspondingly connected to the wind box, and the wind boxes are respectively connected to the main flue through wind box branch pipes. The pressure-reducing assembly disposed on the wind box branch pipe includes a throttling pipe. A negative pressure fine-tuning bypass pipe is disposed on the wind box branch pipe between the wind box and the throttling pipe, connecting the main flue and the wind box branch pipe. A negative pressure regulating valve is disposed on the negative pressure fine-tuning bypass pipe, and the negative pressure fine-tuning bypass pipe cooperates with the throttling pipe to control the negative pressure inside the wind box.

[0004] The above description has the following problems: During the sintering process, the sintering material will leak from the grate bars of the sintering trolley and fall into the air box. The exhaust port of the existing air box is located at the bottom of the air box. Therefore, the sintering material that falls during exhaust will enter through the exhaust port and accumulate in the exhaust component. After long-term operation, the sintering material will block the exhaust component, affecting the air volume of the air box, and thus affecting the sintering quality of the sintering material. Utility Model Content

[0005] The purpose of this invention is to provide a sintering machine air box with automatic gas-material separation, which solves the problem that existing exhaust components are easily blocked by sintering materials, affecting the air volume of the air box and thus affecting the sintering quality of the sintering materials.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a sintering machine air box for automatic gas-material separation, comprising: The bellows body is shaped like an isosceles trapezoid with a wider top and a narrower bottom. A smoke exhaust port is provided on one side of the bellows body, and a material guide port is provided at the bottom of the bellows body. The smoke exhaust assembly includes a smoke exhaust pipe and an electrically controlled valve installed on the smoke exhaust pipe. The smoke inlet of the smoke exhaust pipe is connected to the smoke exhaust outlet, and the smoke outlet of the smoke exhaust pipe is connected to the main flue in the sintering machine. A material guiding assembly, comprising a material guiding pipe and a double-layer ash discharge valve disposed on the material guiding pipe, wherein the inlet of the material guiding pipe is connected to the material guiding port; The regulating component includes a pressure detector and a control unit disposed on the air box body. The signal output terminal of the pressure detector is connected to the signal receiving terminal of the control unit. The signal receiving terminals of the electric control valve and the double-layer ash discharge valve are both connected to the signal output terminal of the control unit. The control unit is used to receive pressure signals to control the opening degree of the electric control valve and to time the opening of the double-layer ash discharge valve to discharge materials.

[0007] Furthermore, a metal corrugated pipe is provided at the connection between the exhaust pipe and the exhaust port.

[0008] Furthermore, the bottom inner wall of the bellows body is recessed outward at the middle position to form a groove for collecting materials, and the material guide port is opened at the lowest point of the groove.

[0009] Furthermore, a baffle filter plate is provided at the smoke exhaust port of the air box body.

[0010] Furthermore, a wear-resistant lining plate is provided on the inner wall of the bellows body.

[0011] Furthermore, a vibrator is provided on the outer wall of the wind box body to prevent sintered materials from accumulating on the inner wall of the wind box body, and the signal receiving end of the vibrator is connected to the signal output end of the control component.

[0012] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a sintering machine air box with automatic gas-material separation. The sintering machine air box with this structure can effectively separate gas and material, reduce internal ash accumulation, and ensure smooth ash discharge. Moreover, it can accurately control the air volume and negative pressure state of the sintering machine air box during operation, thereby improving the sintering quality. Attached Figure Description

[0013] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of the bellows installed on the sintering machine in a preferred embodiment of the present invention; Figure 2This is a cross-sectional view of the sintering machine air box in a preferred embodiment of the present invention; Figure 3 This is a control block diagram in a preferred embodiment of the present invention.

[0014] The reference numerals in the attached figures are explained as follows: 1. Bellows body; 2. Smoke exhaust assembly; 21. Smoke exhaust duct; 22. Electric control valve; 3. Material guiding assembly; 31. Material guiding pipe; 32. Double-layer ash discharge valve; 4. Adjustment components; 41. Pressure detector; 42. Control components; 5. Filter screen plate; 6. Metal bellows; 7. Vibrator; 8. Main flue; 9. Wear-resistant lining plate. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a sintering machine air box for automatic gas-material separation, comprising an air box body 1, a smoke exhaust assembly 2, a material guiding assembly 3, and an adjustment assembly 4.

[0019] refer to Figure 1 , Figure 2 and Figure 3The bellows body 1 is shaped like an isosceles trapezoid, wider at the top and narrower at the bottom. It is typically welded from steel plates. This design conforms to the flow pattern of flue gas in the sintering layer; the wider upper section accommodates more flue gas, while the narrower lower section accelerates the flow, effectively reducing the deposition and eddy currents of sintered materials or dust on the sidewalls. Wear-resistant liners 9 are installed on the inner wall of the bellows body 1. When sintered materials fall and impact the inner wall of the bellows body 1, the wear-resistant liners 9 provide protection.

[0020] refer to Figure 1 , Figure 2 and Figure 3 A smoke exhaust port is provided on one side of the bellows body 1. A baffle filter plate 5 is installed at the smoke exhaust port of the bellows body 1. This baffle filter plate 5 is used to prevent large pieces of sintered material from being sucked into the smoke exhaust assembly 2. A material guide port is provided at the bottom of the bellows body 1. The middle of the bottom inner wall of the bellows body 1 is recessed outward to form a groove for collecting materials. The material guide port is located at the lowest point of the groove. This design can automatically collect the settled sintered material or dust into the material guide port, which greatly improves the ash discharge efficiency.

[0021] refer to Figure 1 , Figure 2 and Figure 3 The smoke exhaust assembly 2 includes a smoke exhaust pipe 21 and an electric control valve 22 installed on the smoke exhaust pipe 21. The smoke inlet of the smoke exhaust pipe 21 is connected to the smoke exhaust outlet, and the smoke outlet of the smoke exhaust pipe 21 is connected to the main flue 8 in the sintering machine. The electric control valve 22 is used to adjust the opening of the smoke exhaust pipe 21, thereby controlling the negative pressure and air volume in the wind box body 1. The material guiding assembly 3 includes a material guiding pipe 31 and a double-layer ash discharge valve 32 installed on the material guiding pipe 31. The inlet of the material guiding pipe 31 is connected to the material guiding port. By setting the exhaust assembly 2 on the side of the wind box body 1 and setting the material guiding assembly 3 at the bottom of the wind box body 1, there is a gap between the exhaust assembly 2 and the material guiding assembly 3. The falling sintered material is more likely to accumulate at the bottom of the wind box body 1 and is less likely to enter the exhaust assembly 2 with the airflow. Therefore, it can better separate the gas and material and facilitate the discharge of sintered material. The double-layer ash discharge valve 32 can continuously discharge ash while maintaining the airtightness of the wind box body 1 by alternating opening and closing, thus preventing air leakage.

[0022] refer to Figure 1 , Figure 2 and Figure 3The regulating component 4 includes a pressure detector 41 and a control component 42 installed on the air box body 1. It is used to detect the negative pressure value in the air box in real time. The pressure detector 41 is a pressure sensor. The signal output terminal of the pressure detector 41 is connected to the signal receiving terminal of the control component 42. The signal receiving terminals of the electric control valve 22 and the double-layer ash discharge valve 32 are both connected to the signal output terminal of the control component 42. The control component 42 is used to receive the pressure signal to control the opening degree of the electric control valve 22 and to control the double-layer ash discharge valve 32 to open and discharge material at regular intervals.

[0023] refer to Figure 1 , Figure 2 and Figure 3 When the sintering machine's air box is operating, if the pressure detector 41 detects that the pressure value (absolute negative pressure value) inside the air box body 1 is lower than the first preset threshold, it indicates insufficient airflow. The controller 42 will then output a command to increase the opening of the electric control valve 22. When the pressure value is higher than the second preset threshold, it indicates excessive airflow. The controller will then reduce the opening of the electric control valve 22 to stabilize the air box pressure within the ideal range, thereby ensuring the stability of the sintering machine's air box during operation and improving sintering quality. In addition, the controller 42 can periodically control the opening and closing of the double-layer ash discharge valve 32 to periodically discharge the sintering material accumulated inside the air box body 1.

[0024] refer to Figure 1 , Figure 2 and Figure 3 A metal corrugated pipe 6 is installed at the connection between the smoke exhaust pipe 21 and the smoke exhaust port. The metal corrugated pipe 6 can effectively compensate for installation errors and displacement caused by thermal expansion and contraction, and improve the sealing performance and reliability of the smoke exhaust pipe 21.

[0025] refer to Figure 1 , Figure 2 and Figure 3 A vibrator 7 is provided on the outer wall of the wind box body 1 to prevent sintered material from accumulating on the inner wall of the wind box body 1. The signal receiving end of the vibrator 7 is connected to the signal output end of the control component 42. The control component 42 controls the operation of the vibrator 7 at regular intervals to perform high-frequency micro-vibration on the wind box body 1, so that the sintered material adhering and accumulating on the inner wall of the wind box body 1 is shaken off to the feed port, which facilitates the discharge of the sintered material.

[0026] In summary, this sintering machine air box with automatic gas-material separation structure can effectively separate gas and material, reduce internal ash accumulation, and ensure smooth ash discharge; moreover, it can accurately control the air volume and negative pressure state of the sintering machine air box during operation, thereby improving sintering quality.

[0027] 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 accordingly. 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 included within the protection scope of this utility model.

Claims

1. A sintering machine air box with automatic gas-material separation, characterized in that, include: The bellows body (1) is a cross-section of an isosceles trapezoid that is wider at the top and narrower at the bottom. A smoke exhaust port is provided on one side of the bellows body (1), and a material guide port is provided at the bottom of the bellows body (1). The smoke exhaust assembly (2) includes a smoke exhaust pipe (21) and an electric control valve (22) installed on the smoke exhaust pipe (21). The smoke inlet of the smoke exhaust pipe (21) is connected to the smoke exhaust outlet, and the smoke outlet of the smoke exhaust pipe (21) is connected to the main flue (8) in the sintering machine. The material guiding assembly (3) includes a material guiding pipe (31) and a double-layer ash discharge valve (32) disposed in the material guiding pipe (31). The inlet of the material guiding pipe (31) is connected to the material guiding port. The regulating component (4) includes a pressure detector (41) and a control component (42) disposed on the air box body (1). The signal output end of the pressure detector (41) is connected to the signal receiving end of the control component (42). The signal receiving ends of the electric control valve (22) and the double-layer ash discharge valve (32) are both connected to the signal output end of the control component (42). The control component (42) is used to receive pressure signals to control the opening degree of the electric control valve (22) and to control the double-layer ash discharge valve (32) to open and discharge materials at regular intervals.

2. The sintering machine air box for automatic gas-material separation according to claim 1, characterized in that, A metal corrugated pipe (6) is provided at the connection between the exhaust pipe (21) and the exhaust port.

3. The sintering machine air box for automatic gas-material separation according to claim 1, characterized in that, The bottom inner wall of the bellows body (1) is recessed outward to form a groove for collecting materials, and the material guide is opened at the lowest point of the groove.

4. The sintering machine air box for automatic gas-material separation according to claim 1 or 3, characterized in that, The exhaust port of the air box body (1) is covered with a baffle filter plate (5).

5. The sintering machine air box for automatic gas-material separation according to claim 4, characterized in that, The inner wall of the bellows body (1) is provided with a wear-resistant lining plate (9).

6. The sintering machine air box for automatic gas-material separation according to claim 5, characterized in that, The outer wall of the wind box body (1) is provided with a vibrator (7) to prevent sintered materials from accumulating on the inner wall of the wind box body (1). The signal receiving end of the vibrator (7) is connected to the signal output end of the control component (42).

Images