Gas-solid separation device, micro-negative pressure ignition control device and sintering machine

Abstract

The invention discloses a gas-solid separation device, a micro-negative pressure ignition control device and a sintering machine, and belongs to the technical field of sintering equipment.The gas-solid separation device comprises a bin body, a gas bin, a material bin and a cinder valve, and a separation mechanism is arranged in the bin body; an inlet of the gas bin communicates with the air bellow, and an outlet of the gas bin communicates with the large flue. An inlet of the material bin communicates with the air bellow, and an outlet of the material bin communicates with the material collecting device. The cinder valve comprises at least two sealing mechanisms, and the two sealing mechanisms are arranged on the material bin; the gas bin and the material bin are formed in the bin body through separation of a separation mechanism, the separation mechanism extends to the position close to the inlet of the bin body, and projections of the inlet of the material bin and the inlet of the gas bin on the plane where the inlet of the bin body is located do not completely coincide. Structural arrangement can be simplified, materials enter the material bin, gas enters the gas bin, separation of the gas and the materials is achieved, abrasion to equipment when the gas carries the materials is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering equipment, and particularly to a gas-solid separation device, a micro-negative pressure ignition control device and a sintering machine. Background Art

[0002] In the sintering process, the ignition link of the sintering machine is one of the key steps affecting the quality and output of sintered products. To ensure the smooth progress of the sintering process, a micro-negative pressure environment is usually required during ignition. Specifically, the pressure in the ignition section wind box generally needs to be controlled within the range of -4 to -6 kPa (kilopascal), and this pressure range is the pressure range of the micro-negative pressure environment during ignition, while the pressure in the sintering section wind box is maintained at about -16 kPa. This pressure gradient design aims to ensure a stable and efficient ignition process while avoiding process problems caused by abnormal pressure.

[0003] However, in actual production, if the negative pressure in the ignition section wind box is too high, a series of chain reactions will occur: a large amount of cold air invades the mixed material layer, resulting in the squeezing and consolidation of the spheroidization gaps inside the layer, and a significant decrease in air permeability. This phenomenon not only prolongs the ignition time but also may cause over-sintered crust on the surface of the layer, hindering the entry of oxygen-containing air into the sintering section, ultimately leading to a decrease in the vertical sintering speed and a double decline in sintering output and quality.

[0004] To solve the above problems, maintaining the micro-negative pressure state in the ignition section wind box has become an industry consensus. Its core advantages include:

[0005] 1. Reduce cold air intrusion: By precisely controlling the negative pressure, effectively reduce the interference of cold air on the layer and stabilize the combustion environment;

[0006] 2. Optimize the air permeability of the layer: Avoid over-tightening the material surface, improve the porosity of the layer, and promote uniform gas distribution;

[0007] 3. Reduce energy consumption: Reasonably match the air volume to reduce the gas consumption during the ignition stage and achieve energy conservation and consumption reduction;

[0008] 4. Improve sintering efficiency: While increasing the layer thickness and output, reduce the sintering coke ratio and optimize the thermal regime;

[0009] 5. Strengthen ignition quality: A stable micro-negative pressure environment helps to improve ignition uniformity and reduce local over-burning or under-burning phenomena;

[0010] 6. Reduce the return ore rate: Optimize the layer structure to reduce the generation of return ore and improve the finished product rate.

[0011] In the prior art, gas-solid separation is not carried out, and the separation of particulate materials from gas is not thorough, resulting in the gas carrying particulate materials to scour the inner wall of the bin or pipeline, causing serious wear problems. This defect not only shortens the service life of the equipment, but also increases the maintenance cost and shutdown risk, restricting the stable operation and efficiency improvement of the sintering process.

[0012] In view of the above technical bottleneck, it is urgent to develop an efficient and stable micro-negative pressure control device to solve the equipment wear problem caused by the incomplete separation of particulate materials from gas, and further improve the reliability and economy of the sintering process. Summary of the Invention

[0013] The object of the present invention is to provide a gas-solid separation device, a micro-negative pressure ignition control device and a sintering machine to solve the problems existing in the above prior art. The gas bin and the material bin are arranged in the same bin body, and the inlets of the material bin and the gas bin are optimized and arranged, which can simplify the structural setting. The material enters the material bin, and the gas enters the gas bin, realizing the separation of gas and material, reducing the wear of the equipment when the gas carries the material, and improving the service life of the equipment.

[0014] To achieve the above object, the present invention provides the following solutions:

[0015] The present invention provides a gas-solid separation device, including a bin body, a gas bin, a material bin and a dust discharge valve. A partition mechanism is arranged in the bin body; the inlet of the gas bin is used to communicate with the air box, and the outlet of the gas bin is used to communicate with the main flue; the inlet of the material bin is used to communicate with the air box, and the outlet of the material bin is used to communicate with the material collection device; the dust discharge valve includes at least two sealing mechanisms, and the sealing mechanisms are arranged on the material bin; the gas bin and the material bin are separated in the bin body by the partition mechanism, and the partition mechanism extends to a position close to the inlet of the bin body. The projections of the inlets of the material bin and the gas bin on the plane where the inlet of the bin body is located do not completely coincide.

[0016] In an embodiment, the dust discharge valve includes two sealing mechanisms, and the two sealing mechanisms are respectively a first bin door and a second bin door. The first bin door is connected to the inlet of the material bin, and the second bin door is connected to the outlet of the material bin.

[0017] In an embodiment, the first bin door seals the inlet of the material bin by gravity and negative pressure suction, and the second bin door seals the outlet of the material bin by gravity.

[0018] In one embodiment, the material bin includes a material discharge section, the outlet of the material discharge section serves as the outlet of the material bin, and the material discharge section is arranged to slope downwards from the end close to the material bin towards the end away from the material bin; the first bin door is hinged to the top of the inlet of the material bin, the opening direction of the first bin door faces the interior of the material bin, the second bin door is hinged to the top of the outlet of the material discharge section, and the opening direction of the second bin door faces the exterior of the material bin.

[0019] In one embodiment, the material bin includes a main body section and a buffer section, the buffer section is located upstream of the main body section, the ash discharge valve includes two sealing mechanisms, and the two sealing mechanisms are respectively a first bin door and a second bin door. The first bin door is connected to the outlet of the buffer section, and the second bin door is connected to the outlet of the main body section.

[0020] In one embodiment, the outlet of the buffer section is arranged in a horizontal plane or a vertical plane. The ash discharge valve further includes a first counterweight, a second counterweight and a switching mechanism. The first counterweight is connected to the first bin door and is used to provide a component force for closing the first bin door. The second counterweight is connected to the second bin door and is used to provide a component force for closing the second bin door; the switching mechanism includes a lever that can rotate under the drive of an external force. The first bin door is connected with a first stop block, and the second bin door is connected with a second stop block. The first stop block in the closed state and the second stop block in the closed state are located on the rotation path of the lever, and the rotation of the lever realizes the periodic opening and closing of the first bin door and the second bin door.

[0021] In one embodiment, the plane where the inlet of the bin body forms an angle with the vertical direction. The inlet of the material bin is lower than the inlet of the gas bin. The outlet of the material bin and the inlet of the material bin are on the same side of the gas bin. The gas trajectory in the gas bin is a first trajectory, and the material trajectory in the material bin is a second trajectory. The second trajectory is located inside the first trajectory, and the inside refers to the side of the gas bin close to the bottom edge of the air box.

[0022] The present invention provides a micro-negative pressure ignition control device, which includes the gas-solid separation device and the air volume regulating valve plate as described above. The air volume regulating valve plate is located in the gas bin and is used to regulate the gas flow passing through the gas bin.

[0023] In one embodiment, the separating mechanism includes a vertical section and an inclined section connected to each other. The inclined section is used to separate the inlet of the gas bin and the inlet of the material bin, and the angle between the inclined section and the vertical section is greater than or equal to the angle between the incoming air direction and the vertical section.

[0024] In one embodiment, the volume of the gas chamber is larger than that of the material chamber.

[0025] In one embodiment, the air volume regulating valve plate is a flap valve plate. The flap valve plate is hinged to the inner wall of the gas chamber through a rotating shaft, located in the middle and lower part of the gas chamber, and the flap valve plate is connected with a rotating driving mechanism.

[0026] In one embodiment, the projected length of the flap valve plate in the vertical plane is not less than the projected width of the gas chamber in the same vertical plane, and the free end of the flap valve plate away from the rotating shaft fits against the inner wall of the gas chamber from bottom to top.

[0027] In one embodiment, a protection plate is further included. The protection plate is obliquely connected to the inner wall of the gas chamber where the rotating shaft is located, and the protection plate is located on the windward side of the rotating shaft to protect the rotating shaft.

[0028] In one embodiment, the air volume regulating valve plate is located in the gas chamber and is used to regulate the gas flow passing through the gas chamber; the air volume regulating valve plate is a plug valve plate, and the plug valve plate is used to move in the radial cross-section of the gas chamber, and the plug valve plate is connected with a translational driving mechanism.

[0029] In one embodiment, the partition structure is a tubular structure, and the tubular structure forms the gas chamber, and the gas chamber is located inside the material chamber.

[0030] In one embodiment, an air filter is further included. The air volume regulating valve plate is located between the air filter and the gas chamber, and the inlet end of the air filter gradually decreases in diameter towards the air volume regulating valve plate.

[0031] In one embodiment, the inner bottom surface of the material chamber is horizontally arranged, and the inner bottom surface can accumulate materials to form a material protection layer;

[0032] And / or, a protective layer is provided on the outer wall of the gas chamber, and the protective layer has wear resistance and acid resistance.

[0033] The present invention provides a sintering machine, including a micro-negative pressure ignition control device, an air box and a main flue as described above. The inlet of the chamber body is connected to the air box; the outlet of the gas chamber is connected to the main flue.

[0034] The present invention has achieved the following technical effects compared with the prior art:

[0035] The gas-solid separation device of the present invention includes a silo body. The gas silo and the material silo are located in the same silo body and are separated by a partitioning mechanism, which simplifies the structural arrangement. At the same time, at least two sealing structures are provided on the material silo. On the basis of allowing the material to pass through the material silo, it can effectively prevent gas from leaking through the material silo. In addition, the partitioning mechanism extends to a position close to the inlet of the silo body, and the inlets of the material silo and the gas silo are optimally arranged so that their projections on the plane where the inlet of the silo body is located do not completely coincide, which is convenient for the material to be separated from the gas at the inlet position of the silo body and enter the material silo. Thus, the material enters the material silo, and the gas enters the gas silo, realizing the separation of gas and material, reducing the wear of the equipment caused by the gas carrying the material through the equipment, and improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 Schematic diagram of the installation structure of the micro-negative pressure ignition control device in the first mode in the embodiment of the present invention;

[0038] Figure 2 For Figure 1 The enlarged view at A in, where B refers to the inner side and C refers to the outer side;

[0039] Figure 3 Schematic diagram of the micro-negative pressure ignition control device in the first mode in the embodiment of the present invention;

[0040] Figure 4 Schematic diagram of the installation structure of the micro-negative pressure ignition control device in the second mode in the embodiment of the present invention;

[0041] Figure 5 Schematic diagram of the micro-negative pressure ignition control device in the second mode in the embodiment of the present invention;

[0042] Figure 6 In the embodiment of the present invention Figure 5 Top view;

[0043] Figure 7 Another deformation schematic diagram of the micro-negative pressure ignition control device in the second mode in the embodiment of the present invention;

[0044] Figure 8 Another deformation installation structure schematic diagram of the micro-negative pressure ignition control device in the second mode in the embodiment of the present invention;

[0045] Figure 9 This is yet another schematic diagram of the deformation of the second - type micro - negative - pressure ignition control device in the embodiments of the present invention;

[0046] Among them, 1. Wind box; 2. Branch pipe; 3. Micro - negative - pressure ignition control device; 4. Main flue; 5. Car; 6. Granular material bin;

[0047] 30. Bin body; 31. Gas bin; 32. Poking rod; 33. First bin door; 34. Second bin door; 35. Material bin; 36. Material discharge section; 37. Flap valve plate; 38. Rotating shaft; 39. Protection plate; 310. First flange; 311. Second flange; 312. Partition mechanism; 313. Air filter; 314. Protective layer; 315. Reinforcing rib;

[0048] 321. Switching mechanism;

[0049] 351. Body section; 352. Buffer section;

[0050] 3121. Inclined section; 3122. Vertical section;

[0051] 331. First counterweight; 332. First stop block; 341. Second counterweight; 342. Second stop block;

[0052] 371. Plug - in valve plate; 372. Translational drive mechanism. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] The purpose of the present invention is to provide a gas - solid separation device, a micro - negative - pressure ignition control device and a sintering machine to solve the problems existing in the prior art. By arranging the gas bin and the material bin in the same bin body and optimizing the layout of the inlets of the material bin and the gas bin, the structure setting can be simplified. When materials enter the material bin and gas enters the gas bin, gas - solid separation can be achieved, reducing the wear of the equipment caused by gas carrying materials and improving the service life of the equipment.

[0055] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0056] Embodiment 1:

[0057] As Figures 1 to 9As shown in the figure, the present invention provides a gas-solid separation device, which includes a silo body 30, a gas silo 31, a material silo 35 and a dust discharge valve. Among them, the cross-section of the silo body 30 can adopt polygonal structures such as rectangle and trapezoid, or circular and elliptical structures, etc., and has a certain internal accommodation space. A partition mechanism 312 is arranged in the silo body 30. The partition mechanism 312 can be structures such as a partition board and a pipeline, etc., so as to be able to divide into different internal silo spaces. Most of the substances flowing in the gas silo 31 are gases, and the gases can also contain a small amount of particulate materials or powder materials. The name of the gas silo 31 should not be a limitation on the medium accommodated or flowing inside it. The inlet of the gas silo 31 is used to connect to the air box 1, and it can be directly connected to the air box 1 or can be connected through a branch pipe 2. The outlet of the gas silo 31 is used to connect to the main flue 4. The main flue 4 is also called the main flue or the gas collecting flue, and it is a key component in the sintering process, mainly responsible for collecting and transporting the high-temperature waste gas generated during the sintering process. The inlet of the material silo 35 is used to connect to the air box 1. Since both the material silo 35 and the gas silo 31 are located in the silo body 30, the material silo 35 and the gas silo 31 are connected through the same structure, that is, the inlet of the silo body 30 is connected to the air box 1. The outlet of the material silo 35 is used to connect to a material collecting device. The material collecting device mentioned here can be a waste recycling box, a material truck or just the ground for stacking materials, etc. The dust discharge valve includes at least two sealing mechanisms. When there are two sealing mechanisms (taking two sealing mechanisms as an example in the embodiment of the present invention), the two sealing mechanisms are arranged on the material silo 35. Among them, one sealing mechanism can be arranged at the inlet or internal position of the material silo 35, and the other sealing mechanism is arranged at the outlet position of the material silo 35. By controlling the non-simultaneous opening of the two sealing mechanisms, the discharge of materials can be realized, and the leakage of gas from the material silo 35 can be avoided. The gas silo 31 and the material silo 35 are separated and formed in the silo body 30 by the partition mechanism 312. The partition mechanism 312 extends to a position close to the inlet of the silo body 30. The projections of the inlets of the material silo 35 and the gas silo 31 on the plane where the inlet of the silo body 30 is located do not completely coincide. This incomplete coincidence includes at least two situations: partial coincidence and complete non-coincidence. In the former situation, after the gas-solid mixture enters the silo body 30 through the inlet of the silo body 30, part of the materials enter the material silo 35, and the gas can enter the gas silo 31; in the latter situation, after the gas-solid mixture enters the silo body 30 through the inlet of the silo body 30, most or all of the materials enter the material silo 35, and the gas can enter the gas silo 31; the effect of gas-solid separation in the latter situation is better than that in the former situation. Therefore, if a better gas-solid separation effect is expected, the latter situation is preferred. No matter which of the above-mentioned situations, by limiting the inlets of the material silo 35 and the gas silo 31 on the plane where the inlet of the silo body 30 is located, the present invention can enable the materials to better enter the material silo 35 under the action of gravity, effectively separating the gas and the solid.

[0058] The gas-solid separation device of the present invention includes a silo body 30. The gas silo 31 and the material silo 35 are located within the same silo body 30 and are separated by a separating mechanism 312, which simplifies the structural arrangement. At the same time, at least two sealing structures are provided on the material silo 35. On the basis of allowing the material to pass through the material silo 35, it can effectively prevent gas from leaking through the material silo 35. In addition, the separating mechanism 312 extends to a position close to the inlet of the silo body 30, and the inlets of the material silo 35 and the gas silo 31 are optimally arranged such that their projections on the plane where the inlet of the silo body 30 is located do not completely overlap, which facilitates the separation of the material from the gas at the inlet position of the silo body 30 and allows the material to enter the material silo 35. Thus, the material enters the material silo 35, and the gas enters the gas silo 31, realizing the separation of gas and material, reducing the wear of the equipment when the gas carries the material through the equipment, and improving the service life of the equipment.

[0059] In one embodiment, as Figures 1 to 3 shown, the ash discharge valve includes two sealing mechanisms, which are respectively a first hatch 33 and a second hatch 34. The first hatch 33 and the second hatch 34 can adopt forms such as a flap structure or a cover plate structure. Among them, the first hatch 33 is connected to the inlet of the material silo 35. As Figure 2 and Figure 3 shown, the dotted-line first hatch 33 in the figure represents the position of the first hatch 33 in the closed state. In the closed state, the first hatch 33 can maintain a vertical state, and a triangular accommodation cavity is formed between the first hatch 33 and the inner wall of the material silo 35, where some separated materials can be stored. When the accumulated materials increase, the materials push the first hatch 33 to open under the action of their own gravity, and the materials enter the interior of the material silo 35. The second hatch 34 is connected to the outlet of the material silo 35. When the materials in the material silo 35 accumulate to a certain extent, at this time, the accumulated materials can push the second hatch 34 to open under the action of their own gravity, so as to discharge the materials to the outside of the material silo 35. By arranging the first hatch 33 and the second hatch 34 at the inlet and outlet of the material silo 35, it can ensure that the material silo 35 has a sufficient volume, realize the batch accumulation and intermittent discharging of materials, and effectively handle and discharge the materials. In this example, the installation angle of the second hatch 34 (the angle between the second hatch 34 and the vertical plane) is controlled between 0° and 35°. When it is greater than 0°, the outlet plane of the material silo 35 slopes upward to ensure that the second hatch 34 can close the outlet of the material silo 35 under its own weight.

[0060] In one embodiment, as Figures 1 to 3As shown, the first bin door 33 and the second bin door 34 can be controlled by a power mechanism to open or close. In this example, the gas-solid separation device is applied to a negative pressure environment. At this time, the first bin door 33 seals the inlet of the material bin 35 by its own gravity (or an additional counterweight) and the negative pressure suction inside the device. When the gravity of the accumulated material is greater than the gravity of the first bin door 33 and the negative pressure suction it receives, the first bin door 33 can be smoothly opened. The second bin door 34 seals the outlet of the material bin 35 by its own gravity (or an additional counterweight). When the gravity of the accumulated material is greater than the gravity of the second bin door 34, the second bin door 34 can be smoothly opened. The above method of controlling the opening and closing of the first bin door 33 and the second bin door 34 can be achieved without an additional power mechanism, which can simplify the structure and reduce the manufacturing and maintenance costs.

[0061] In one embodiment, as Figures 1 to 3 shown, the material bin 35 includes a material discharge section 36. The material discharge section 36 can be located inside the bin body 30 or extend outside the bin body 30. The outlet of the material discharge section 36 serves as the outlet of the material bin 35. That is, the material inside the main body of the material bin 35 flows to the material discharge section 36 and then is discharged through the second bin door 34 at the outlet of the material discharge section 36. The material discharge section 36 is inclined downward from the end close to the material bin 35 to the end far from the material bin 35, that is, the material discharge section 36 is inclined downward towards the outlet of the material bin 35. This inclined manner helps the fluidity of the material in the material discharge section 36, so that the material can flow to the position of the second bin door 34 under its own gravity, and finally, when the material accumulates to a certain extent, it overcomes the gravity of the second bin door 34 and opens the second bin door 34. In this example, the angle between the material discharge section 36 and the horizontal plane is between 15° and 75°, which can effectively ensure the fluidity of the material in the material discharge section 36.

[0062] In one embodiment, as Figures 1 to 3 shown, both the first bin door 33 and the second bin door 34 adopt a rotational opening method. Taking the first bin door 33 as an example, the rotation axis can be connected to a position near the top of the first bin door 33, and the first bin door 33 is pushed to open under the action of the material. In this example, the first bin door 33 is hinged to the top of the inlet of the material bin 35, and the opening direction of the first bin door 33 faces the inside of the material bin 35. The second bin door 34 is hinged to the top of the outlet of the material discharge section 36, and the opening direction of the second bin door 34 faces the outside of the material bin 35.

[0063] In one embodiment, as Figures 4 to 7As shown, the material bin 35 includes a main body section 351 and a buffer section 352. The buffer section 352 is located upstream of the main body section 351. That is to say, the material first enters the buffer section 352 and then enters the main body section 351. In fact, the buffer section 352 can be formed by moving the installation position of the first hatch 33 towards the second hatch 34. Or, the main body section 351 is formed by expanding and connecting on the basis of the buffer section 352. At this time, the buffer section 352 is located inside the bin body 30, while the main body section 351 can be located outside the bin body 30. The two sealing mechanisms are the first hatch 33 and the second hatch 34 respectively. The first hatch 33 is connected to the outlet of the buffer section 352 to control whether the material enters the main body section 351 from the buffer section 352. The second hatch 34 is connected to the outlet of the main body section 351 to control whether the material is discharged from the main body section 351. The setting of the buffer section 352 improves the temporary storage capacity of the material bin 35 for the material. The main body section 351 can be used only as a discharge valve. After the material accumulates in the buffer section 352, the inner wall surface of the buffer section 352 is covered by the material, reducing the wear of the inner wall surface caused by the material flow.

[0064] In one embodiment, as Figures 4 to 7 shown, the outlet of the buffer section 352 is set on a horizontal plane ( Figure 7 shown) or set on a vertical plane ( Figure 5 shown). Both setting methods can achieve the discharge of the material. The ash discharge valve further includes a first counterweight 331 and a second counterweight 341. The first counterweight 331 is connected to the first hatch 33. When the first hatch 33 is set on the vertical plane, the first counterweight 331 is set on the outer side of the first hatch 33, that is, the opening direction. In this way, in the natural state, the first counterweight 331 can provide a component force for closing the first hatch 33. When the first hatch 33 is set on the horizontal plane, the first hatch 33 and the first counterweight 331 are located on both sides of the hinge axis of the first hatch 33. At this time, the moment of the first counterweight 331 should be greater than the moment of the first hatch 33, so that the first hatch 33 is pushed upward by the first counterweight 331 and abuts against the outlet of the buffer section 352. In this way, it is more beneficial for the material to enter the main body section 351 from the buffer section 352 under the action of gravity. The second counterweight 341 is connected to the second hatch 34. Similar to the way of setting the first hatch 33 on the vertical plane, the second counterweight 341 is set on the outer side of the second hatch 34, that is, the opening direction. In this way, in the natural state, the second counterweight 341 can provide a component force for closing the second hatch 34.

[0065] In one embodiment, as Figures 4 to 7As shown, the ash discharge valve further includes a switching mechanism 321. The power source of the switching mechanism 321 is not limited and can be electric, pneumatic, hydraulic drive, etc. In this example, the switching mechanism 321 can adopt electric drive, such as an electric motor. The switching mechanism 321 further includes a lever 32. The lever 32 is connected to the drive end of the switching mechanism 321. In this example, the lever 32 is driven to rotate by an electric motor, and the rotation speed of the lever 32 can be controlled. The lever 32 can adopt a structure with an arc-shaped working surface, so that after rotating to a certain position, the arc-shaped working surface can gradually push the corresponding stopper, and after rotating to the next position, it can be separated from the stopper. The stoppers mentioned here are the first stopper 332 and the second stopper 342 mentioned below. The first bin door 33 is connected with the first stopper 332, and the included angle between the first stopper 332 and the first bin door 33 remains fixed. The second bin door 34 is connected with the second stopper 342, and the included angle between the second stopper 342 and the second bin door 34 remains fixed. The first stopper 332 in the closed state and the second stopper 342 in the closed state are located on the rotation path of the lever 32. Thus, by rotating the lever 32, the gravity of the first counterweight 331 and the second counterweight 341 can be overcome to realize the periodic opening and closing of the first bin door 33 and the second bin door 34.

[0066] In an embodiment, as Figures 1 to 7 shown, the bin body 30 is kept vertically arranged as a whole. The plane where the inlet of the bin body 30 is located has an included angle with the vertical direction. At this time, the inlet of the bin body 30 is obliquely connected to equipment such as the air box 1 above. The inlet of the material bin 35 is lower than the inlet of the gas bin 31. The mixture of gas and material will preferentially reach the inlet position of the material bin 35, that is, under the action of gravity, the material will preferentially enter the material bin 35 to achieve more efficient gas-solid separation. The outlet of the material bin 35 and the inlet of the material bin 35 are on the same side of the gas bin 31 (taking Figure 3 the direction shown as an example, the outlet and the inlet of the material bin 35 are on the right side of the gas bin 31). The gas trajectory in the gas bin 31 is the first trajectory, and the material trajectory in the material bin 35 is the second trajectory. The second trajectory is located inside the first trajectory. The inside refers to the side of the gas bin 31 close to the bottom edge of the air box 1, that is, the side where the bottom edge of the connection position between the air box 1 and the bin body 30 is located (as Figure 2At point B in the middle, it refers to the inner side, and at point C, it refers to the outer side). By adopting the above setting method, the gas can move along a longer first trajectory, while the material moves along a relatively shorter second trajectory. At the inlet position of the bin body 30, the gas and the material are separated, effectively reducing the wear on the inner wall of the equipment when the gas carries a large amount of material. Reducing the trajectory length of the material can further reduce the wear of the material movement on the inner wall of the equipment. Increasing the gas trajectory length can increase the turning radius of the gas, reduce the resistance and obstacles of gas flow, and reduce the wear caused by the gas carrying a small amount of material in the gas bin 31. The first trajectory and the second trajectory can adopt shapes such as arc trajectory, C-shaped trajectory, broken line trajectory, U-shaped trajectory, etc. The key lies in reducing the flow path and scouring force of the material and the gas containing the material, and reducing wear.

[0067] Embodiment 2:

[0068] As Figures 1 to 9 shown, the present invention provides a micro-negative pressure ignition control device, including the gas-solid separation device and the air volume regulating valve plate described above. The air volume regulating valve plate is located in the gas bin 31 and is used to adjust the gas flow rate passing through the gas bin 31. The air volume regulating valve plate can adopt various known forms, such as mobile type, flap type, folding type and other structural forms. By using the gas-solid separation device mentioned above, the gas-solid separation effect can be improved, the amount of material entering the gas bin 31 can be reduced, thereby effectively reducing the wear condition of the gas bin 31 when adjusting the air volume (negative pressure state), and improving the service life of the equipment.

[0069] In one embodiment, the gas-solid separation and micro-negative pressure regulation adopt an integrated design. The gas goes through the upper gas bin 31. In this example, a micro-negative pressure full-automatic electrical control device is provided. By controlling the position of the air volume regulating valve plate through the micro-negative pressure full-automatic electrical control device, the flow rate is controlled to achieve the purpose of adjusting the air volume to control the negative pressure. When the negative pressure reaches the set requirement, the valve opening automatically stops at the scale position, and the system starts to work normally. At the same time, the computer data enters the automatic memory state and does not need to be adjusted again.

[0070] In one embodiment, as Figures 1 to 3As shown, after the gas-solid mixture enters the gas-solid separation device, the material has a tendency to enter the material bin 35 along the lower layer under its own weight. When the accumulated weight of the material is greater than the negative pressure suction force of the first bin door 33, the first bin door 33 automatically opens, and the material enters the material bin 35. At the same time, the first bin door 33 automatically closes under its own weight and negative pressure state, enabling the device to complete the gas-solid separation and storage of the material without leakage. When the material weight in the material bin 35 is greater than the negative pressure suction force of the second bin door 34, the second bin door 34 automatically opens to complete automatic discharging. Throughout the process, gas-solid separation and discharge can be completed without personnel and equipment. Through this device, the negative pressure of the system can be adjusted, and the material can be discharged from the bin in a timely manner, enabling the device to smoothly complete the low negative pressure in the micro-negative pressure ignition section while disposing of the material, improving the safety performance of the device and extending its service life.

[0071] In one embodiment, as Figures 1 to 3 shown, the partition mechanism 312 at least includes a vertical section 3122 and an inclined section 3121 connected to each other. The vertical section 3122 is mainly used to form the volume sizes of the gas bin 31 and the material bin 35, and the inclined section 3121 is mainly used to guide and separate the gas and material in the incoming wind direction. The inclined section 3121 extends to the inlet position of the bin body 30 and is used to separate the inlet of the gas bin 31 and the inlet of the material bin 35, so that the material enters the material bin 35 under the action of gravity, while the gas and a very small amount of material enter the gas bin 31. The included angle between the inclined section 3121 and the vertical section 3122 is greater than or equal to the included angle between the incoming wind direction and the vertical section 3122. Thus, the scouring effect of the air flow on the inclined section 3121 can be significantly reduced, the resistance of the air flow entering the gas bin 31 can be reduced, and at the same time, the gas-solid separation effect can be effectively improved. In this example, the included angle between the vertical section 3122 and the inclined section 3121 is between 130° and 160°, and can be accurately calculated during design according to the required air volume and negative pressure magnitude. When the air volume is very small, the wind speed entering the gas bin 31 will be very low, and the scouring of the gas bin 31 will be significantly reduced. At the same time, due to the settlement of large particles, the cleanliness of the wind is improved, and the scouring of the wind on the gas bin 31 is also reduced, extending the service life of the gas bin 31.

[0072] In one embodiment, as Figures 1 to 3 shown, the volume of the gas bin 31 is larger than the volume of the material bin 35, which plays a role in reducing the wind speed. In a preferred embodiment, the volume ratio of the gas bin 31 to the material bin 35 can be set to 2:1, that is, the gas bin 31 accounts for approximately 2 / 3 of the volume of the entire bin body 30, and the material bin 35 accounts for approximately 1 / 3 of the volume of the entire bin body 30.

[0073] In one embodiment, the air volume regulating valve plate can adopt the plug valve plate 371 in Embodiment 3. The specific structure is described in Embodiment 3 and will not be elaborated here. In this example, as Figures 1 to 3As shown in the figure, the air volume regulating valve plate adopts a flap valve plate 37. The flap valve plate 37 is hinged to the inner wall of the gas chamber 31 through a rotating shaft 38. The flap valve plate 37 is connected with a rotation driving mechanism, which can be electric or manual, and can be provided with a feedback adjustment mechanism, that is, the opening degree of the flap valve plate 37 is feedback adjusted according to the magnitude of the negative pressure value. The flap valve plate 37 can be arranged at any position of the gas chamber 31 as long as the effects of opening and closing can be achieved. In this example, the flap valve plate 37 is arranged in the middle and lower part of the gas chamber 31. The position of the flap valve plate 37 is above the outlet of the gas chamber 31 and is preferably greater than or equal to the length of the flap valve plate 37. When the angle of the flap valve plate 37 is adjusted, the air volume will change, and accordingly the negative pressure will change. Arranging the flap valve plate 37 in the middle and lower part of the gas chamber 31 can reduce the scouring effect of the material carried in the airflow on the gas chamber 31 and reduce the maintenance frequency of the micro negative pressure ignition control device 3.

[0074] In an embodiment, as Figures 1 to 3 shown, the projected length of the flap valve plate 37 in the vertical plane is not less than the projected width of the gas chamber 31 in the same vertical plane. That is to say, the length of the flap valve plate 37 is not less than the width of the gas chamber 31 in the horizontal plane. The free end of the flap valve plate 37 away from the rotating shaft 38 fits the inner wall of the gas chamber 31 from bottom to top to achieve the effect of closing the gas passage. When the flap valve plate 37 rotates downward, the gas passage can be opened. The rotation angle of the flap valve plate 37 can control the opening size of the gas passage, thereby ultimately controlling the magnitude of the negative pressure. In this example, the projected length of the flap valve plate 37 in the vertical plane is greater than the projected width of the gas chamber 31 in the same vertical plane, that is, the length of the flap valve plate 37 is greater than the width of the gas chamber 31 in the horizontal plane. At this time, when the flap valve plate 37 is in the closed state, the whole flap valve plate 37 inclines downward. Thus, the flap valve plate 37 has an included angle with the oncoming airflow and can be not directly impacted by the oncoming airflow, reducing the influence on the flap valve plate 37.

[0075] In an embodiment, as Figures 1 to 3 shown, it further includes a protection plate 39. The protection plate 39 is obliquely connected to the inner wall of the gas chamber 31 where the rotating shaft 38 is located. The protection plate 39 is located on the windward side of the rotating shaft 38. On the one hand, it avoids the scouring of the airflow carrying materials on the rotating shaft 38. On the other hand, it avoids the materials carried by the airflow falling on the rotating shaft 38 and affecting the rotation of the rotating shaft 38 to protect the rotating shaft 38 and improve the service life of the flap valve plate 37. The protection plate 39 inclines along the airflow direction, matches the airflow in the gas chamber 31, and is generally consistent with the inclination direction of the flap valve plate 37 to form a guiding effect on the airflow. Thus, the resistance to the airflow can be reduced, the impact force received by the protection plate 39 can be reduced, and the service life of the protection plate 39 can also be extended.

[0076] Example Three:

[0077] As Figures 1 to 9 shown, the present invention provides a micro-negative pressure ignition control device, which includes the gas-solid separation device and the air volume regulating valve plate described above. The air volume regulating valve plate is located in the gas bin 31 and is used to regulate the gas flow passing through the gas bin 31. The air volume regulating valve plate can adopt various known forms, such as mobile type, flap type, folding type and other structural forms. By using the gas-solid separation device mentioned above, the gas-solid separation effect can be improved, the amount of materials entering the gas bin 31 can be reduced, so as to effectively reduce the wear condition of the gas bin 31 when adjusting the air volume (negative pressure state), and improve the service life of the equipment.

[0078] The air volume regulating valve plate can adopt the flap valve plate 37 in the second embodiment, and the specific structure can be referred to the description in the second embodiment, which will not be elaborated here. In this example, as Figures 4 to 9 shown, the air volume regulating valve plate adopts a plug valve plate 371. The plug valve plate 371 is used to move within the radial cross-section of the gas bin 31. The plug valve plate 371 is connected with a translational driving mechanism 372. The translational driving mechanism 372 can adopt forms such as electric / pneumatic telescopic cylinders, linear motors, rotary cams, etc., or can also be manually adjusted. By changing the area of the plug valve plate 371 blocking the air flow channel, the flow rate of the gas bin 31 is changed, and then the negative pressure environment is adjusted. The above method of controlling the negative pressure by the opening degree of the plug valve plate 371, combined with the setting of the translational driving mechanism 372, has a high degree of automation. The dust content (material carrying amount) of the dust-containing gas will also be reduced, reducing the erosion of the inner wall of the gas bin 31, and can effectively extend the service life of the gas bin 31.

[0079] In one embodiment, as Figures 4 to 9 shown, when the materials in the material bin 35 increase, the self-weight increases, and the pressure on the branch pipe 2 or the air box 1 increases. Regular discharging is required. The switching mechanism 321 can realize automatic discharging within the set time under the control of the PLC (programmable logic controller). The first bin door 33 and the second bin door 34 are automatically opened and closed by the electric switching mechanism 321. Under the action of the motor, the first bin door 33 is opened. Under the action of the first counterweight 331, the first bin door 33 is automatically closed. When the motor rotates to a specific position, the second bin door 34 is automatically opened again, and the materials in the material bin 35 are discharged from the second bin door 34. At the same time, the second bin door 34 is automatically closed under its own weight (or combined with the second counterweight 341). One of the two bin doors is always in a closed state, and the negative pressure will not leak, ensuring that the whole negative pressure is in a stable state, which is not only beneficial to the effective circulation of clean air, but also can ensure that the heavy particle materials enter the material bin 35 reasonably and orderly, with a longer service life, more convenient adjustment, simpler installation, which is beneficial to reducing the maintenance cost and long-term use of the equipment.

[0080] In one embodiment, asFigures 4 to 9 As shown, the separation mechanism 312 adopts a tubular structure, such as a square tube, a circular tube, etc. The plug valve plate 371 moves along the radial direction of the tubular structure, and the inside of the tubular structure serves as the gas chamber 31. At this time, the gas chamber 31 is located inside the material bin 35, forming a structure where the gas chamber 31 is surrounded by the material bin 35. The gas carrying the material surrounds the outer wall of the gas chamber 31, which has a greater impact on the erosion of the outer wall of the gas chamber 31. Therefore, a protective layer 314 can be provided on the outer wall of the gas chamber 31. The protective layer 314 has wear resistance and acid resistance, and can well protect the gas chamber 31. In this example, the protective layer 314 adopts a spray coating. The spray coating has high strength and acid resistance. The high strength can reduce the erosion of the outer wall of the gas chamber 31 by granular materials, and the acid resistance can reduce the corrosion of the outer wall of the gas chamber 31 by sulfur-containing gases and particles. Thus, the spray coating is used to protect the gas chamber 31, and at the same time, the service life of the gas chamber 31 is increased. There is a wire mesh in the spray coating as a skeleton. At the same time, the spray coating is wear-resistant and acid-resistant. The spraying thickness is 35 mm to 50 mm, and the spraying height is based on the height of the gas chamber 31, and is generally designed to be 200 mm to 500 mm.

[0081] In one embodiment, the pipeline structure extends out of the bottom plate of the bin body 30, and the extended part is connected and fixed by a reinforcing rib 315. The reinforcing rib 315 is connected to the outer wall of the pipeline structure and the outer wall of the bottom plate, which is convenient for fixing the stability of the pipeline structure.

[0082] In one embodiment, as Figures 4 to 9 shown, it further includes an air filter 313 for filtering out the materials in the gas. The plug valve plate 371 is located between the air filter 313 and the gas chamber 31. That is to say, the relatively pure gas filtered by the air filter 313 enters the gas chamber 31 after passing through the plug valve plate 371. Thus, the erosion and wear of the inner wall of the gas chamber 31 can be reduced. The air filter 313 can adopt a structure such as a filter cotton or a filter filler with a pore structure. When granular fillers are used, a mesh structure can also be provided at the inlet of the air filter 313 to prevent the scattering of the granular fillers. In addition, in actual application, considering the effect of negative pressure, if the granular fillers can be well adsorbed and fixed on the air filter 313, the mesh structure may not be provided at the inlet. To prevent the material from blocking the inlet of the air filter 313, the inlet plane of the air filter 313 can be set in an inclined downward or vertically downward form, which can make the material falling on the inlet of the air filter 313 fall into the material bin 35 by gravity. In this example, the caliber of the inlet end of the air filter 313 gradually decreases in the direction of the plug valve plate 371, that is, the inlet of the air filter 313 is set to be larger than the subsequent pipeline, that is, the inlet is relatively large. This design can reduce the wind speed, and thus reduce the wear of the air filter 313 and the gas chamber 31.

[0083] In one embodiment, as Figures 4 to 9 shown, the inner bottom surface of the material bin 35 is horizontally arranged and can accumulate materials. Under the action of gravity, the materials will concentrate on the inner bottom surface and hardly flow, forming a material protection layer. On the one hand, it reduces the direct erosion of the inner bottom surface by the materials, and on the other hand, it can also reduce the splashing of the materials after hitting the inner bottom surface. Thus, both the inner bottom surface and the inner side surface are protected, realizing the protection of the entire bin body 30.

[0084] In one embodiment, as Figure 8 and Figure 9 shown, the inlets of the material bin 35 and the gas bin 31 are staggered from each other, that is, the projections of the inlets of the material bin 35 and the gas bin 31 on the plane where the inlet of the bin body 30 (which is also the inlet of the material bin 35) is located do not completely coincide. In this example, the inlet of the material bin 35 is higher than the inlet of the gas bin 31, and the inlets of the two bins are staggered (completely non - overlapping). The first trajectory is located inside the second trajectory. The above structure can also achieve efficient separation of gas and materials. In this example, the inlet and the outlet of the material bin 35 are on the same side of the gas bin 31. After the materials enter the material bin 35 from the inlet of the material bin 35, they automatically accumulate below the inlet of the material bin 35. Setting the inlet and the outlet of the material bin 35 on the same side of the gas bin 31 can more conveniently discharge the materials in the material bin 35. When the inlet and the outlet of the material bin 35 are not on the same side of the gas bin 31, the bottom plate of the material bin 35 can also be set to be inclined downward towards the outlet to guide the materials to accumulate at the outlet for convenient material discharge. Setting the inlet and the outlet of the material bin 35 on the same side of the gas bin 31 makes the structure more reasonable and the processing and production simpler.

[0085] Example 4:

[0086] As Figures 1 to 9 shown, the present invention provides a sintering machine, including the micro - negative - pressure ignition control device 3, the air box 1 and the main flue 4 as described above. The inlet of the bin body 30 is directly or indirectly connected to the air box 1, and the outlet of the gas bin 31 is directly or indirectly connected to the main flue 4. Therefore, by controlling the micro - negative - pressure ignition control device 3, the micro - negative - pressure environment of the air box 1 can be adjusted.

[0087] In an embodiment, a branch pipe 2 is provided. The branch pipe 2 is connected to the air box 1. The air box 1 is located below the trolley 5 loaded with materials. A granular material bin 6 is provided below the trolley 5 on the empty lane. The granular material bin 6 is used to collect the residual materials on the trolley 5. The branch pipe 2 is set in an inclined state. When it is connected to the micro-negative pressure ignition control device 3, it is connected to the inlet of the bin body 30 through an inclined connection port. When connecting, a first flange 310 is provided at the inlet of the bin body 30, and a second flange 311 is provided at the outlet of the gas bin 31. The first flange 310 is connected to the branch pipe 2, and the second flange 311 is connected to another branch pipe 2 leading to the main flue 4. By adopting the connection mode of the first flange 310 and the second flange 311, the installation and maintenance are convenient and fast. It is easy to butt the flange with the branch pipe 2, and the first flange 310 and the second flange 311 are easy to install and connect, achieving a user-friendly design.

[0088] In the present invention, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A gas-solid separation device, characterized in that, Comprising: A silo body (30) with a partitioning mechanism (312) arranged therein; A gas silo (31) whose inlet is used to communicate with the air box (1) and whose outlet is used to communicate with the main flue (4); A material silo (35) whose inlet is used to communicate with the air box (1) and whose outlet is used to communicate with the material collection device; And a dust discharge valve, the dust discharge valve comprising at least two sealing mechanisms arranged on the material silo (35); The gas silo (31) and the material silo (35) are separated and formed in the silo body (30) by the partitioning mechanism (312), the partitioning mechanism (312) extends to a position close to the inlet of the silo body (30), and the projections of the inlet of the material silo (35) and the inlet of the gas silo (31) on the plane where the inlet of the silo body (30) is located do not completely coincide.

2. The gas-solid separation device according to claim 1, characterized in that: The dust discharge valve comprises two sealing mechanisms, namely a first bin door (33) and a second bin door (34). The first bin door (33) is connected to the inlet of the material silo (35), and the second bin door (34) is connected to the outlet of the material silo (35).

3. The gas-solid separation device according to claim 2, wherein: The first bin door (33) seals the inlet of the material silo (35) by gravity and negative pressure suction, and the second bin door (34) seals the outlet of the material silo (35) by gravity.

4. The gas-solid separation device according to claim 2, wherein: The material silo (35) includes a material discharge section (36), the outlet of the material discharge section (36) serves as the outlet of the material silo (35), and the material discharge section (36) is arranged to slope downwards from the end close to the material silo (35) towards the end far from the material silo (35); the first bin door (33) is hinged to the top of the inlet of the material silo (35), and the opening direction of the first bin door (33) faces the inside of the material silo (35), and the second bin door (34) is hinged to the top of the outlet of the material discharge section (36), and the opening direction of the second bin door (34) faces the outside of the material silo (35).

5. The gas-solid separation device according to claim 1, characterized in that: The material silo (35) includes a main body section (351) and a buffer section (352), the buffer section (352) is located upstream of the main body section (351), the dust discharge valve comprises two sealing mechanisms, namely a first bin door (33) and a second bin door (34), the first bin door (33) is connected to the outlet of the buffer section (352), and the second bin door (34) is connected to the outlet of the main body section (351).

6. The gas-solid separation device according to claim 5, wherein: The outlet of the buffer section (352) is arranged in a horizontal plane or a vertical plane. The ash discharge valve further includes a first counterweight (331), a second counterweight (341) and a switching mechanism (321). The first counterweight (331) is connected to the first bin door (33), and the first counterweight (331) is used to provide a component force for closing the first bin door (33). The second counterweight (341) is connected to the second bin door (34), and the second counterweight (341) is used to provide a component force for closing the second bin door (34). The switching mechanism (321) includes a lever (32) that can rotate under the drive of an external force. The first bin door (33) is connected with a first stop block (332), and the second bin door (34) is connected with a second stop block (342). The first stop block (332) in the closed state and the second stop block (342) in the closed state are located on the rotation path of the lever (32). The rotation of the lever (32) realizes the periodic opening and closing of the first bin door (33) and the second bin door (34).

7. The gas-solid separation device according to claim 1, wherein: The plane where the inlet of the bin body (30) is located has an included angle with the vertical direction. The inlet of the material bin (35) is lower than the inlet of the gas bin (31). The outlet of the material bin (35) and the inlet of the material bin (35) are on the same side of the gas bin (31). The gas trajectory in the gas bin (31) is a first trajectory, and the material trajectory in the material bin (35) is a second trajectory. The second trajectory is located inside the first trajectory. The inside refers to the side of the gas bin (31) close to the bottom edge of the air box (1).

8. A micro-negative pressure ignition control device, characterized in that, Comprising: The gas-solid separation device according to any one of claims 1-7; And an air volume regulating valve plate, which is located in the gas bin (31) and is used to regulate the gas flow passing through the gas bin (31).

9. The micro-negative pressure ignition control device according to claim 8, characterized in that: The separating mechanism (312) includes a vertical section (3122) and an inclined section (3121) that are connected to each other. The inclined section (3121) is used to separate the inlet of the gas bin (31) and the inlet of the material bin (35). The included angle between the inclined section (3121) and the vertical section (3122) is greater than or equal to the included angle between the incoming air direction and the vertical section (3122).

10. The micro-negative pressure ignition control device according to claim 8, characterized in that: The volume of the gas bin (31) is larger than the volume of the material bin (35).

11. The micro-negative-pressure ignition control device according to claim 8, characterized in that: The air volume regulating valve plate adopts a flap valve plate (37). The flap valve plate (37) is hinged to the inner wall of the gas bin (31) through a rotating shaft (38), is located in the middle and lower part of the gas bin (31), and the flap valve plate (37) is connected with a rotation driving mechanism.

12. The micro-negative pressure ignition control device according to claim 11, characterized in that: The projection length of the flap valve plate (37) in the vertical plane is not less than the projection width of the gas bin (31) in the same vertical plane. The free end of the flap valve plate (37) away from the rotating shaft (38) fits the inner wall of the gas bin (31) from bottom to top.

13. The micro-negative pressure ignition control device according to claim 11, characterized in that: It further includes a protection plate (39), the protection plate (39) is obliquely connected to the inner wall of the gas chamber (31) where the rotating shaft (38) is located, and the protection plate (39) is located on the windward side of the rotating shaft (38) to protect the rotating shaft (38).

14. The micro-negative pressure ignition control device according to claim 8, wherein: The air volume regulating valve plate adopts a plug valve plate (371), the plug valve plate (371) is used to move within the radial cross-section of the gas chamber (31), and the plug valve plate (371) is connected with a translational driving mechanism (372).

15. The micro-negative pressure ignition control device according to claim 8 or 14, characterized in that: The partitioning mechanism is of a tubular structure, the tubular structure forms the gas chamber (31), and the gas chamber (31) is located inside the material bin (35).

16. The micro-negative pressure ignition control device according to claim 15, wherein: It further includes an air filter (313), the air volume regulating valve plate is located between the air filter (313) and the gas chamber (31), and the inlet end of the air filter (313) gradually decreases in diameter towards the air volume regulating valve plate direction.

17. The micro-negative pressure ignition control device according to claim 15, characterized in that: The inner bottom surface of the material bin (35) is horizontally arranged, and the inner bottom surface can accumulate materials to form a material protection layer; And / or, a protective layer (314) is provided on the outer wall of the gas chamber (31), and the protective layer (314) has wear resistance and acid resistance.

18. A sintering machine, characterized in that, Comprising: The micro-negative pressure ignition control device according to any one of claims 8-17; An air box (1), the inlet of the bin body (30) is connected to the air box (1); And a main flue (4), the outlet of the gas chamber (31) is connected to the main flue (4).

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