Feeding system

Abstract

The invention provides a feeding system, and belongs to the field of material conveying. The feeding system comprises a valve cavity and a valve plate, wherein the valve cavity is used for receiving a reaction material and feeding the reaction material into a reaction furnace; the valve plate is connected to the interior of the valve cavity in a turnover mode, and the opening degrees of the valve cavity are different when the valve plate is turned to different angles. A movable gap exists between the edge of the valve plate and the inner wall of the valve cavity. The valve plate comprises an air cavity, the air cavity comprises an inflation inlet used for introducing compressed air and an injection hole used for injecting the compressed air, and the injection direction of the injection hole faces the inner wall of the valve cavity so that the compressed air injected by the injection hole can form an air curtain at the movable gap. And combustible gas generated after reaction of reaction materials in the reaction furnace is prevented from flowing back upwards to the upstream material incoming direction of the valve cavity through the movable gap.

Description

Technical Field

[0001] This invention relates to the field of material conveying, and more particularly to a feeding system. Background Technology

[0002] Coal is a major energy source and an important industrial raw material. While providing reliable energy security for economic and social development, coal also emits a large amount of the greenhouse gas carbon dioxide. Against this backdrop, all sectors are seeking green and low-carbon fuels to replace coal in order to reduce carbon emissions and production costs. Biomass fuel is an ideal alternative fuel with the following advantages: (1) Renewability, as a large amount of industrial, agricultural and forestry waste and domestic garbage are produced every year. (2) Low pollution, its SO2 content is very low. x NO x (2) Low CO2 emission intensity. Biomass has a net carbon dioxide emission of almost zero during its growth cycle, which can effectively mitigate the greenhouse effect. (3) It can save a lot of land resources and reduce pollution.

[0003] At present, alternative fuels such as biomass, waste-derived fuel (RDF), and solid reclaimed fuel (SRF) generally have the characteristics of high moisture content, low calorific value, and large fluctuations in composition. Direct combustion has disadvantages such as low combustion efficiency, poor combustion stability, and low heat utilization. The technical route of gasifying alternative fuels and then sending the gas into the furnace for combustion or syngas production is a relatively efficient alternative fuel utilization path. However, this technical route has two main technical problems: (1) The furnace of the gasifier is generally a positive pressure environment with a furnace pressure of about 10 kPa, making it difficult to feed materials into the furnace. (2) Alternative fuels such as biomass, RDF, and SRF are lightweight and porous. It is difficult for alternative fuels to form a material seal during transportation to prevent the positive pressure gas in the furnace from backflowing into the silo, thereby causing gas leakage and safety accidents such as the alternative fuel ignition in the silo. The anti-backflow technology under positive pressure conditions has become the key technology of the alternative fuel feeding system. Summary of the Invention

[0004] In view of this, in order to at least partially solve the aforementioned technical problems, the present invention provides a feeding system.

[0005] According to one aspect of the present invention, a feeding system is provided, comprising: a valve cavity and a valve plate, the valve cavity being used to receive reactants and feed reactants into a reactor; the valve plate being rotatably connected to the interior of the valve cavity, and the degree of opening of the valve cavity being different when the valve plate is rotated to different angles; wherein, there is a movable gap between the edge of the valve plate and the inner wall of the valve cavity; the valve plate includes a gas cavity, the gas cavity including an inlet for introducing compressed gas and an injection hole for injecting compressed gas, the injection direction of the injection hole being towards the inner wall of the valve cavity, so that the compressed gas injected by the injection hole forms an air curtain at the movable gap, preventing the combustible gas generated after the reactants react in the reactor from flowing back upward to the upstream of the valve cavity through the movable gap.

[0006] According to an embodiment of the present invention, during the feeding process, the feeding is controlled by opening and closing the valve plate, and a gas seal is formed by the injection hole of the gas chamber, which can realize the isolation between the reactor and the valve chamber, thereby achieving smoother transport of the reactant materials and reducing the risk of combustion of the valve chamber caused by the upward flow of gas. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the feeding system in an embodiment of the present invention;

[0008] Figure 2 This is a schematic diagram of the valve plate of the feeding system in an embodiment of the present invention;

[0009] Figure 3 for Figure 2 K-direction view of the central valve plate;

[0010] Figure 4 This is a schematic diagram of the feeding system in another embodiment of the present invention;

[0011] Figure 5 for Figure 4 A-direction view of the feeder system;

[0012] Figure 6 This is a schematic diagram of the feeding system in another embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1-Valve cavity;

[0015] 1a - First valve cavity;

[0016] 1b - Second valve chamber;

[0017] 2-Valve plate;

[0018] 2a - First valve plate;

[0019] 2b - Second valve plate;

[0020] 2c - Third valve plate;

[0021] 2d - Fourth valve plate;

[0022] 21 - Inflation port;

[0023] 22-Injection hole;

[0024] 3-Drive mechanism;

[0025] 31 - First support shaft;

[0026] 32 - Second support shaft;

[0027] 33 - First toggle lever;

[0028] 34 - Second toggle lever;

[0029] 35-Drive cam;

[0030] 4a - First Gravity Hammer;

[0031] 4b - Second gravity hammer;

[0032] 5a - First limiting component;

[0033] 5b - Second limiting component; Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0037] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0038] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). When using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0039] In realizing the concept of this invention, it was discovered that lightweight, loose alternative fuels suffer from the problem of positive pressure gas backflowing into the silo during transportation. Related technologies, such as lock hopper feeding systems, require compressing loose alternative fuels like biomass, RDF, and SRF into block or rod-shaped materials before feeding them into a two-stage lock hopper system. The lock hoppers are alternating pressure tanks connected to high and low pressure equipment, and the feeding, pressurizing, discharging, and depressurizing cycles are performed by switching between high and low pressure to ensure the alternative fuel is smoothly delivered to the gasifier to meet production requirements. However, the lock hopper feeding system requires the alternative fuel to be compressed into shape, resulting in high pretreatment costs. Furthermore, the lock hopper system is a series type, requiring a large vertical space for the entire conveying system, leading to high construction costs.

[0040] Another related technology is the plug-lock air-feeding system, which uses a high-torque variable-diameter screw conveyor to transport the crushed, loose alternative fuel. During the conveying process, the material is compressed at the discharge end to form a plug, thereby creating a material seal to prevent positive pressure gas from flowing back into the silo. However, the plug-lock air-feeding system requires a high-power motor to generate high torque to compress the material and form the plug, resulting in high system energy consumption. Furthermore, the large, dense plugs fed into the furnace are not suitable for fluidized bed furnaces, leading to poor gasification.

[0041] Related technologies also employ rotary airlock valves to prevent backflow of gas. These valves achieve airtight isolation through the rotation of rotor blades. As the rotor blades rotate, the material is evenly carried into the conveying system, simultaneously forming a sealed conveying channel that effectively isolates the upper and lower air pressures, preventing gas leakage. However, the airlock effect of the rotary airlock valve depends on its manufacturing precision, which in turn affects its operational stability, easily causing impeller jamming and motor tripping. Furthermore, when the material is strip-shaped or has long fibers, entanglement can easily occur, leading to tripping and affecting the normal operation of the feeding system.

[0042] Therefore, in the design of the feeding system, it is necessary to solve the problem of gas backflow while minimizing energy consumption and extending the service life of the system.

[0043] In view of this, the present invention provides a feeding system to at least partially solve the above-mentioned technical problems.

[0044] According to one embodiment of the present invention, a feeding system is provided, comprising: a valve cavity and a valve plate.

[0045] The valve chamber is used to receive reactants and feed them into the reactor.

[0046] The valve plate is flipped and connected inside the valve cavity, and the degree of opening of the valve cavity varies when the valve plate is flipped to different angles.

[0047] There is a movable gap between the edge of the valve plate and the inner wall of the valve cavity; the valve plate includes a gas cavity, which includes an air inlet for introducing compressed gas and an injection hole for injecting compressed gas. The injection direction of the injection hole is towards the inner wall of the valve cavity, so that the compressed gas injected by the injection hole forms an air curtain at the movable gap, preventing the combustible gas generated after the reaction of the reactants in the reactor from flowing back up through the movable gap to the upstream material in the valve cavity.

[0048] According to embodiments of the present invention, the opening and closing of the valve plate can control the feeding, and the rotation angle of the valve plate can also control the feeding amount. Combined with the injection orifice capable of spraying compressed gas to form an air curtain seal, the present invention can precisely control the feeding while blocking gas backflow in the downstream reactor from the source. Compared with related technologies such as the material plug-lock air-feeding system and the rotary air-lock valve feeding system to prevent gas backflow, the feeding system of the present invention has the advantages of saving investment and operating costs. Moreover, the feeding system of the present invention has high operational reliability, adapts to a wide variety of materials, and does not cause long strips of material to become entangled, thus adapting to a wider range of application scenarios.

[0049] Figure 1 This is a schematic diagram of the feeding system in an embodiment of the present invention.

[0050] The feeding system connects to the upstream inlet chute via an upper flange and to the downstream outlet chute via a lower flange. The outlet chute then connects to the downstream furnace, thus feeding the furnace. The furnace can be of various types, such as a gasifier or an activation furnace. Figure 1As shown, the feeding system includes a valve cavity 1 and a valve plate 2. The valve plate 2 is disposed inside the valve cavity 1, specifically at the inlet, outlet, or middle of the valve cavity 1. Preferably, the valve plate 2 is disposed inside the valve cavity 1 near the inlet. The valve plate 2 can be flipped open. When the valve plate 2 is flipped to a first angle, for example, when the angle between the valve plate 2 and the inlet plane of the valve cavity is greater than 20°, the valve cavity 1 is opened. When the valve plate 2 is flipped to a second angle, for example, when the angle between the valve plate 2 and the inlet plane of the valve cavity is less than 20°, the valve cavity 1 is closed. When the valve plate 2 is open, it can feed the downstream reactor. The amount of material fed varies depending on the degree of opening of the valve plate 2, increasing as the degree of opening of the valve plate 2 increases. There are movable gaps between the three edges of valve plate 2 (except for the other edge connecting the rotating shaft) and the inner wall of valve cavity 1. Furthermore, the gas pressure in the reactor is higher than standard atmospheric pressure, making it easy for gas in the downstream reactor to backflow upwards through these gaps, posing a risk of fire in the valve cavity. To address the gas leakage problem caused by insufficient machining precision and the high reactor pressure, this invention incorporates a gas chamber within valve plate 2, with the gas pressure within the chamber required to be higher than the gas pressure in the reactor.

[0051] Figure 2 This is a schematic diagram of the valve plate of the feeding system in an embodiment of the present invention; Figure 3 This is a k-axis view of the valve plate of the feeding system in an embodiment of the present invention. Figure 2 As shown, the valve plate 2 has multiple injection holes 22 distributed on its side; as Figure 3 As shown, the side of the view from direction k in Figure 2 also has multiple injection holes 22.

[0052] According to an embodiment of the present invention, the valve plate 2 can be a hollow structure to form a gas cavity. The gas cavity includes an inlet 21 for introducing compressed gas. The compressed gas entering from the inlet 21 is ejected from the injection port 22. The injection port 22 is located at the edge of the valve plate 2, and the injection direction is towards the inner wall of the valve cavity 1, so that the compressed gas injected by the injection port 22 forms an air curtain at the movable gap, preventing the combustible gas generated after the reaction of the reactants in the reactor from flowing back up to the upstream of the valve cavity 1 through the movable gap. Multiple injection ports 22 can be provided on three sides of the valve plate 2. Compared with those provided on only one or two sides, providing injection ports 22 on three sides can block the backflow of gas in the reactor to a greater extent and in a more comprehensive manner.

[0053] Furthermore, the direction of the injection hole 22 can be set to horizontal or downward. Horizontal direction refers to the direction parallel to the surface of the valve plate 2, forming an air curtain that prevents the gas from flowing upward. The injection hole 22 can also be oriented downward; the downward component can blow the backflowing gas back into the reactor, providing better anti-backflow protection than the horizontal direction. It also washes away materials adhering to the inner wall of the valve cavity, allowing them to enter the reactor for reaction and preventing material buildup and waste. However, the injection hole 22 cannot be vertically downward; otherwise, gaps will remain between the air curtain and the inner wall of the valve cavity 1, failing to prevent backflow of gas.

[0054] According to an embodiment of the present invention, the compressed gas in the gas chamber can be an inert gas, which can be selected from any one or more of nitrogen, carbon dioxide, argon, and helium.

[0055] According to embodiments of the present invention, such as Figure 1 As shown, the valve chamber 1 includes a first valve chamber 1a and a second valve chamber 1b distributed vertically, and the first valve chamber 1a and the second valve chamber 1b are connected by a middle flange; the valve plate 2 includes a first valve plate 2a that can be flipped and connected inside the first valve chamber, and a second valve plate 2b that can be flipped and connected inside the second valve chamber. The feeding system also includes a drive mechanism 3. During the feeding process, the drive mechanism 3 can drive the first valve plate 2a and the second valve plate 2b to flip alternately, that is, to ensure that at least one valve plate 2 is closed, so that the reactor can always be isolated from the upstream feed chute. Combined with the jet structure of the valve plate 2, a tighter gas seal is formed, which can ensure the smooth falling of materials while preventing gas from rising. In addition, the drive mechanism 3 can have various structural forms, as long as it is any mechanism that can drive the first valve plate and the second valve plate to flip alternately.

[0056] According to embodiments of the present invention, such as Figure 1 As shown, the drive mechanism 3 includes a central drive cam 35 and two sets of upper and lower support shafts and a lever. The drive cam 35 and the lever are located outside the valve cavity 1; the first support shaft 31 is located in the first valve cavity 1a and is connected to the first valve plate 2a and the first lever 33; the second support shaft 32 is located in the second valve cavity 1b and is connected to the second valve plate 2b and the second lever 34.

[0057] According to an embodiment of the present invention, a first support shaft 31 is installed on the first side of the first valve cavity. One side of the first valve plate 2a (the side without the injection hole 22) and one end of the first actuating handle 33 are rotatably connected to the first support shaft 31. The first valve plate 2a and the first actuating handle 33 are fixedly connected, that is, the angle between the first valve plate 2a and the first actuating handle 33 is fixed and the angle between them is an obtuse angle. A second support shaft 32 is installed on the second side of the second valve cavity. One side of the second valve plate 2b (the side without the injection hole 22) and one end of the second actuating handle 34 are rotatably connected to the second support shaft 32. The second valve plate 2b and the second actuating handle 34 are fixedly connected, that is, the angle between the second valve plate 2b and the second actuating handle 34 is fixed and the angle between them is an obtuse angle.

[0058] During the counterclockwise rotation of the drive cam 35, the rim of the drive cam 35 alternately pushes the first actuating handle 33 and the second actuating handle 34 to rotate around the first support shaft 31 and the second support shaft 32, respectively, thereby causing the first valve plate 2a and the second valve plate 2b to alternately rotate around the first support shaft 31 and the second support shaft 32, respectively. Specifically, in Figure 1 In the indicated state, the drive cam 35 rotates counterclockwise, first pushing the first actuating handle 33 upwards. The first valve plate 2a is then flipped downwards, opening the first valve chamber 1a. Reactants enter the first valve chamber 1a from the feed chute. At this time, the second valve plate 2b is closed, and the injection hole 22 continuously injects compressed gas to prevent backflow of gas. The drive cam 35 continues to rotate counterclockwise, returning the first valve plate 2a to its original position. The drive cam 35 then pushes the second actuating handle 34 upwards, causing the second valve plate 2b to flip downwards. The second valve chamber 1b opens, and reactants fall from the first valve chamber 1a through the second valve chamber 1b into the discharge chute, providing reactants for the downstream furnace. At this time, the first valve plate 2a closes, and the injection hole 22 continuously injects compressed gas to prevent backflow of gas. This invention achieves physical isolation between the valve chamber 1 and the furnace by alternating opening and closing of the vertically positioned valve chamber 1 and valve plate 2, combined with the injection of compressed gas, thus preventing backflow of gas while ensuring smooth feeding and reducing the risk of ignition of reactants.

[0059] According to embodiments of the present invention, such as Figure 1As shown, the feeding system also includes a first gravity hammer 4a, which is rotatably connected to the first support shaft 31, and the first gravity hammer 4a and the first valve plate 2a are fixedly connected. When the rim of the drive cam 35 is not in contact with the first actuating handle 33, the first valve plate 2a is rotated by its own weight to close the first valve cavity 1a. Similarly, the feeding system also includes a second gravity hammer 4b, which is rotatably connected to the second support shaft 32, and the second gravity hammer 4b and the second valve plate 2b are fixedly connected. When the rim of the drive cam 35 is not in contact with the second actuating handle 34, the second valve plate 2b is rotated by its own weight to close the second valve cavity 1b.

[0060] According to an embodiment of the present invention, the first gravity hammer 4a and the second gravity hammer 4b can close the valve plate 2 in a timely manner by relying on their own gravity. Compared with other mechanical devices (such as hydraulic drive devices), the gravity hammer has a simpler structure, lower process requirements, is less prone to damage, and has the advantage of low energy consumption. The gravity hammer's timely closure of the valve plate 2 can prevent material accumulation and overflow, blockage of the system inlet and outlet, and gas backflow, which could cause a system explosion. It can also prevent excessive material conveying and prevent subsequent processes from exceeding the load limit due to excessive material.

[0061] According to embodiments of the present invention, such as Figure 1 As shown, the feeding system also includes a first limiting member 5a, installed on the third side of the first valve cavity, the third side being opposite to the first side. The first limiting member 5a is used to limit the flipping angle of the first valve plate 2a to a predetermined angle (i.e., the angle between the first valve plate 2a and the inlet plane of the valve cavity 1 when the edge of the first valve plate 2a is close to the first limiting member 5a) during the flipping process of the first valve plate 2a, so as to close the first valve cavity 1a. Similarly, the feeding system also includes a second limiting member 5b, installed on the fourth side of the second valve cavity, the fourth side being opposite to the second side. The second limiting member 5b is used to limit the flipping angle of the second valve plate 2b to a predetermined angle (i.e., the angle between the second valve plate 2b and the inlet plane of the valve cavity 1 when the edge of the second valve plate 2b is close to the second limiting member 5b) during the flipping process of the second valve plate 2b, so as to close the second valve cavity 1b.

[0062] According to an embodiment of the present invention, the limiting member not only limits the valve plate to a predetermined angle to close the valve cavity 1, but also blocks the gaps between the first valve plate 2a and the third inner wall of the first valve cavity 1a, and between the second valve plate 2b and the fourth inner wall of the second valve cavity 1b, so as to better prevent the backflow of gas.

[0063] According to embodiments of the present invention, such as Figure 1 As shown, the first side and the second side mentioned above are the same side, that is, the first support shaft 31 and the second support shaft 32 are installed on the same side of the valve cavity 1, and the first valve plate 2a and the second valve plate 2b have the same flipping direction. Figure 1For example, both the first valve plate 2a and the second valve plate 2b are flipped to the lower right.

[0064] To better adapt to the characteristics of flip-plate feeding, this invention proposes the following... Figure 4 , Figure 5 The alternative solutions shown.

[0065] Figure 4 This is a schematic diagram of the feeding system in another embodiment of the present invention. Figure 5 This is a left view of the feeding system in another embodiment of the present invention. Figure 4 , Figure 5 As shown, the first side and the second side are opposite sides, that is, the first support shaft 31 and the second support shaft 32 are respectively installed on opposite sides of the valve cavity 1; the angle between the valve plate 2 and the toggle handle is an acute angle and the angle is fixed; the toggle handle and the drive cam 35 are installed on the same side of the valve cavity 1.

[0066] In this embodiment, as Figure 4 As shown, the first valve plate 2a and the second valve plate 2b rotate in opposite directions. During the feeding process, Figure 4 In the indicated state, the drive cam 35 first rotates counterclockwise, pushing the first actuating handle 33 downwards. The first valve plate 2a is then flipped downwards, opening the first valve chamber 1a. The reactant enters the first valve chamber 1a from the lower right. At this time, the second valve plate 2b is closed, and the injection hole 22 continuously injects compressed gas to prevent backflow of gas. The drive cam 35 then rotates clockwise, returning the first valve plate 2a to its original position. The drive cam 35 then pushes the second actuating handle 34 downwards, causing the second valve plate 2b to flip downwards. The second valve chamber 1b opens, and the reactant falls from the first valve chamber 1a through the second valve chamber 1b into the discharge chute from the lower left, providing reactant for the downstream furnace. At this time, the first valve plate 2a closes, and the injection hole 22 continuously injects compressed gas to prevent backflow of gas.

[0067] Due to the instantaneous and large-volume unloading characteristics of the flip-plate, compared to the previous embodiment ( Figure 1 In the embodiment shown, the first valve plate 2a and the second valve plate 2b rotate in the same direction, which easily leads to material segregation. The segregation force is a combination of gravity, inertia, and friction, which causes significant separation of coarse and fine particles in time and space, disrupting the homogeneity of the reactants and causing quality fluctuations in the downstream reactor. The concentrated coarse particles and hard impurities after segregation also scour and impact the valve plate 2 and the discharge chute, accelerating component wear and increasing the frequency of spare parts replacement. In this embodiment (…), Figure 4 , Figure 5 (As shown in the embodiment) The adverse effects of segregation force can be reduced by flipping the first valve plate 2a and the second valve plate 2b in opposite directions.

[0068] To further reduce the risk of gas backflow, this invention proposes the following... Figure 6 The alternative solutions shown.

[0069] Figure 6 This is a schematic diagram of the feeding system in another embodiment of the present invention.

[0070] According to an embodiment of the present invention, a feeding unit is composed of a first valve cavity 1a, a first valve plate 2a, a second valve cavity 1b, a second valve plate 2b, and a drive mechanism 3. Figure 6 As shown, the feeding system includes two sets of feeding units distributed vertically. The first set of feeding units is labeled as described above, while the valve plates 2 in the second set of feeding units are labeled as the third valve plate 2c and the fourth valve plate 2d.

[0071] In this embodiment, the combination of two sets of feeding units can further enhance the gas sealing effect. Specifically, the drive mechanism 3 in the upper and lower sets of feeding units can rotate synchronously, that is, the first valve plate 2a and the third valve plate 2c open at the same time to feed the material. At this time, the reactant falls on the closed second valve plate 2b and the fourth valve plate 2d. At the same time, the valve plates spray compressed gas to form an air curtain. Combined with the double-closed valve plates, it can effectively prevent the gas from rising.

[0072] Alternatively, the drive mechanism 3 in the upper and lower feeding units can rotate asynchronously, that is, the four valve plates open and close in sequence. In this way, when feeding, three valve plates are closed at the same time. Combined with the compressed gas sprayed out by the valve plates to form an air curtain, it can more effectively prevent the gas from rising and ensure smooth feeding.

[0073] In summary, the feeding system of this invention is simple in design. Through the sequential opening and closing of two valve plates and an air-filled sealing structure, it enables smooth material feeding while preventing gas from rising. Compared to traditional lock hopper feeding systems and plug-lock air-feeding systems, it saves on investment and operating costs, eliminates the need to compress reactants into material seals, resulting in lower energy consumption; it also eliminates the need for high-precision machining, ensuring high operational reliability; it prevents the entanglement of long strips of material, adapts to a wide variety of materials, and has broad application scenarios.

[0074] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A feeding system, comprising: a valve cavity for receiving reactant and feeding the reactant into a reactor; a valve plate reversibly connected inside the valve cavity, and the valve cavity has different opening degrees when the valve plate is reversed to different angles; wherein there is a movable gap between the edge of the valve plate and the inner wall of the valve cavity; the valve plate comprises an air cavity, the air cavity comprises a gas inlet for introducing compressed gas, and a jet hole for jetting compressed gas, the jet direction of the jet hole is towards the inner wall of the valve cavity, so that the compressed gas jetted from the jet hole forms an air curtain at the movable gap, preventing the combustible gas produced after the reaction of the reactant in the reactor from returning upward to the upstream of the valve cavity through the movable gap.

2. The system according to claim 1, wherein: the air pressure in the air cavity is higher than the air pressure in the reactor, and the air pressure in the reactor is higher than the standard atmospheric pressure.

3. The system according to claim 1, wherein: the valve plate is a hollow structure to form the air cavity, and the jet hole is arranged at the edge of the valve plate.

4. The system according to claim 1, wherein: wherein the valve cavity comprises a first valve cavity and a second valve cavity distributed along the vertical direction, and the first valve cavity and the second valve cavity are in communication; the valve plate comprises a first valve plate reversibly connected inside the first valve cavity, and a second valve plate reversibly connected inside the second valve cavity; the system further comprises a driving mechanism for driving the first valve plate and the second valve plate to reverse alternately.

5. The system according to claim 4, wherein the driving mechanism comprises: a first support shaft mounted on a first side of the first valve cavity; a second support shaft mounted on a second side of the second valve cavity; a first toggle handle; a second toggle handle; a rotatable driving cam; wherein one side of the first valve plate and one end of the first toggle handle are rotatably connected to the first support shaft, and the first valve plate and the first toggle handle are fixedly connected; one side of the second valve plate and one end of the second toggle handle are rotatably connected to the second support shaft, and the second valve plate and the second toggle handle are fixedly connected; during the rotation of the driving cam, the rim of the driving cam alternately pushes the first toggle handle and the second toggle handle to rotate around the first support shaft and the second support shaft respectively, so as to drive the first valve plate and the second valve plate to reverse alternately around the first support shaft and the second support shaft respectively.

6. The system according to claim 5, wherein: the first side and the second side are the same side, and the first valve plate and the second valve plate have the same reversing direction.

7. The system according to claim 5, wherein: the first side and the second side are opposite sides, and the first valve plate and the second valve plate have opposite reversing directions.

8. The system according to claim 4, wherein: the first valve cavity, the first valve plate, the second valve cavity, the second valve plate, and the driving mechanism constitute a feeding unit; the system comprises two groups of the feeding units distributed along the vertical direction.

9. The system of claim 5, wherein, further comprising: A first gravity hammer is rotatably connected to the first support shaft and fixedly connected to the first valve plate, and is used to drive the first valve plate to flip over to close the first valve cavity by gravity during a process in which the rim of the driving cam is not in contact with the first actuating handle; A second gravity hammer is rotatably connected to the second support shaft and fixedly connected to the second valve plate, and is used to drive the second valve plate to flip over to close the second valve cavity by gravity during a process in which the rim of the driving cam is not in contact with the second actuating handle.

10. The system of claim 5, further comprising: a first limiting member installed on a third side of the first valve cavity, the third side being opposite to the first side, the first limiting member being used to limit a flipping angle of the first valve plate to a predetermined angle to close the first valve cavity during a flipping process of the first valve plate; a second limiting member installed on a fourth side of the second valve cavity, the fourth side being opposite to the second side, the second limiting member being used to limit a flipping angle of the second valve plate to a predetermined angle to close the second valve cavity during a flipping process of the second valve plate.

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