A pressurizing device for the bottom of a coal powder lock hopper

Abstract

The utility model belongs to the technical field of coal powder lock hopper, disclose a kind of coal powder lock hopper bottom pressure charging device, comprising: coal powder lock hopper, the lower part of coal powder lock hopper is provided with flute pipe;The flute pipe is arranged in the inside of the coal powder lock hopper;The bottom in the coal powder lock hopper is provided with inflatable cone;The side surface of the flute pipe is provided with several flute pipe openings, and the inflatable cone is provided with several inflatable cone openings;The flute pipe and the inflatable cone are connected with pressure charging gas device by pipeline.The utility model can optimize coal powder lock hopper pressure charging control, avoid further gathering in positive pressure side after adding powder coke in coal powder and blocking gas passage, leading to the operation pressure difference of flute pipe and inflatable cone is high, and the operation problem of small coal powder lock hopper pressure charging gas volume.

Description

Technical Field

[0001] This utility model belongs to the field of coal powder lock hopper technology, specifically relating to a coal powder lock hopper bottom pressurization device. Background Technology

[0002] The pulverized coal lock hopper is an important piece of equipment in the pulverized coal gasification furnace pulverized coal conveying system. It controls the high and low pressure of the pulverized coal lock hopper to realize the conveying of pulverized coal from low-pressure equipment to high-pressure equipment and the high-pressure gasification of pulverized coal.

[0003] As the gasifier's operating time increases and pulverized coke is blended into the raw coal, high operating pressure differentials frequently occur in the pulverized coal lock hopper's flute and charging cone, leading to frequent system alarms and a risk of damaging the sintered metal of the flute and charging cone. To reduce the frequency of system alarms and the risk of equipment damage, the control pressure differential of the flute and charging cone must be reduced. This results in a longer pulverized coal lock hopper pressurization time, a decrease in the amount of pulverized coal conveyed per unit time, and affects the high-load operation of the gasifier.

[0004] The existing pulverized coal lock hopper takes too long to pressurize, exceeding 22 minutes, which is slow. This pressing time increases with operating time, with the pulverized coal lock hopper cycle taking over 54 minutes. When the gasifier load is high, it cannot guarantee a sufficient supply of pulverized coal. The pressure difference between the pulverized coal lock hopper's flute and the filling cone increases, damaging the equipment. As the pulverized coal lock hopper operates for longer periods, the increased pressure difference between the flute and the filling cone can cause the flute to detach and block the pulverized coal pipeline. The sintered metal inside the filling cone may also collapse, blocking the pulverized coal discharge channel. Frequent bridging of the pulverized coal lock hopper leads to poor material discharge, significantly increasing the workload of operators. The existing pulverized coal lock hopper requires frequent maintenance, increasing production costs. When the pressure difference between the pulverized coal lock hopper's flute and the filling cone increases, or when damage occurs, maintenance is required, affecting the gasifier load and incurring additional costs for replacing the flute and the filling cone.

[0005] Chinese Patent Publication No. CN113122334A, entitled "A Gas-Induced Filtration System and Its Usage Method," discloses a gas-inducing filtration system and its usage method. The system includes a preheater, a buffer tank, a filter, and a lock hopper system. The buffer tank is connected to a boundary area via a pipeline to receive inert gas from the boundary area. The preheater is installed on the pipeline. The buffer tank is connected to both the filter and the lock hopper system. The filter is used to prevent backflow of pulverized coal within the lock hopper system. However, this patent application's lock hopper system cannot guarantee a sufficient supply of pulverized coal when the gasifier is under high load, and it also cannot prevent damage to gas-inducing devices such as the whistle and gas-inducing cone due to increased pressure differential. Utility Model Content

[0006] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide a coal powder lock hopper bottom pressurization device. By drilling holes on the side of the flute and the air filling cone, the pressurization control of the coal powder lock hopper can be optimized, avoiding the coal powder from accumulating on the positive pressure side and blocking the gas channel, resulting in high operating pressure difference between the flute and the air filling cone, as well as the problem of small pressurization gas volume in the coal powder lock hopper.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model discloses a coal powder lock hopper bottom pressurization device, comprising: a coal powder lock hopper, wherein a flute is provided at the lower part of the coal powder lock hopper; the flute is provided inside the coal powder lock hopper; an air-filling cone is provided at the bottom of the coal powder lock hopper; a plurality of flute openings are provided on the side of the flute, and a plurality of air-filling cone openings are provided on the air-filling cone; both the flute and the air-filling cone are connected to a pressurization air device through pipes.

[0008] Optionally, the flute is disposed on the inner wall of the pulverized coal lock hopper.

[0009] Optionally, the long axis of the flute is oriented along the inner wall of the pulverized coal lock hopper toward the bottom center of the pulverized coal lock hopper.

[0010] Optionally, the flute is connected to a pressurizing device via a flute pressurizing pipe, and the inflation cone is connected to the pressurizing device via an inflation cone pressurizing pipe.

[0011] Optionally, a flute pressurization valve is provided on the flute pressurization pipeline; an air cone pressurization valve is provided on the air cone pressurization pipeline.

[0012] Optionally, the flute pressurization pipeline is provided with a flute pressurization auxiliary line; the air cone pressurization pipeline is provided with an air cone pressurization auxiliary line; both ends of the flute pressurization auxiliary line are respectively connected to the flute pressurization pipeline; both ends of the flute pressurization auxiliary line are respectively located at both ends of the flute pressurization valve; both ends of the air cone pressurization auxiliary line are respectively connected to the air cone pressurization pipeline; and both ends of the air cone pressurization auxiliary line are respectively located at both ends of the air cone pressurization valve.

[0013] Optionally, a flute tube sub-line orifice plate is provided inside the flute tube pressurization sub-line; an air cone sub-line orifice plate is provided on the air cone pressurization sub-line.

[0014] Optionally, the flute tube has multiple flute tube openings on its side, and the flute tube openings are arranged in columns along the long axis of the flute tube.

[0015] Optionally, a through hole is provided at the center of the bottom of the inflatable cone.

[0016] Optionally, the bottom of the flute tube is provided with several through holes.

[0017] Compared with the prior art, the present invention has the following beneficial effects: To solve the problem of high pressure difference between the lock-flute tube and the inflation cone This utility model discloses a bottom pressurization device for a pulverized coal lock hopper. By drilling holes on the sides of the flute and the inflation cone, it optimizes the pressurization control of the pulverized coal lock hopper and avoids the problem of high operating pressure difference and low pressurization volume of the pulverized coal lock hopper caused by the further accumulation of coke powder on the positive pressure side after adding coke powder to the pulverized coal. This achieves stable pressurization of the pulverized coal lock hopper and a stable pressure difference between the inflation flute and the inflation cone, preventing damage to the flute and the inflation cone due to high pressure difference.

[0018] Furthermore, by optimizing the coal powder lock hopper pressurization pipeline, this utility model can reduce the backflow of coal powder into the pressurized sintering metal within the lock hopper, thereby enabling long-term operation of the coal powder lock hopper pressurization internals. Attached Figure Description

[0019] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; The components include: 1. Flute tube pressurization valve; 2. Flute tube auxiliary line orifice plate; 3. Inflatable cone pressurization valve; 4. Inflatable cone auxiliary line orifice plate; 5. Pulverized coal lock hopper; 6. Flute tube; 7. Flute tube opening; 8. Inflatable cone; 9. Inflatable cone opening; 10. Pressurization device; 101. Main pipeline; 102. Flute tube pressurization pipeline; 103. Inflatable cone pressurization pipeline; 104. Flute tube pressurization auxiliary line; 105. Inflatable cone pressurization auxiliary line. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0021] Therefore, the following detailed description of embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] When an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. The use of the term "horizontal" does not imply that the component is required to be absolutely horizontal, but rather that it may be slightly tilted. "Horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0024] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] The present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1As shown, a coal powder lock hopper bottom pressurization device of this utility model includes: a coal powder lock hopper 5, a flute 6 provided at the lower part of the coal powder lock hopper 5; the flute 6 is located inside the coal powder lock hopper 5; an air-filling cone 8 is provided at the bottom inside the coal powder lock hopper 5; a plurality of flute openings 7 are provided on the side of the flute 6, and a plurality of air-filling cone openings 9 are provided on the air-filling cone 8; both the flute 6 and the air-filling cone 8 are connected to a pressurization air device 10 through pipes.

[0028] This utility model discloses a bottom pressurization device for a pulverized coal lock hopper. By drilling holes on the sides of the flute 6 and the inflation cone 8, it optimizes the pressurization control of the pulverized coal lock hopper 5, preventing pulverized coal from accumulating on the positive pressure side and blocking the gas passage, thus avoiding the problems of high operating pressure difference between the flute 6 and the inflation cone 8, and low pressurization volume of the pulverized coal lock hopper 5. This achieves stable pressurization of the pulverized coal lock hopper 5 and stabilizes the pressure difference between the inflation flute 6 and the inflation cone 8, preventing damage to the flute 6 and the inflation cone 8 due to high pressure difference.

[0029] Example 1 This embodiment of a coal powder lock hopper bottom pressurization device includes: a coal powder lock hopper 5, a flute 6 disposed at the lower part of the coal powder lock hopper 5; the flute 6 disposed inside the coal powder lock hopper 5; an air-filling cone 8 disposed at the bottom inside the coal powder lock hopper 5; a plurality of flute openings 7 opened on the side of the flute 6, and a plurality of air-filling cone openings 9 opened on the air-filling cone 8; both the flute 6 and the air-filling cone 8 are connected to a pressurization air device 10 through pipes.

[0030] The flute 6 is installed on the inner wall of the pulverized coal lock hopper 5.

[0031] Specifically, the pulverized coal lock hopper 5 includes an upper tank and a lower tank connected to each other; the upper tank is a hollow cylinder, and the lower tank is a cone. Specifically, in this embodiment, the upper tank is a hollow cylinder, and the lower tank is a hollow cone. The flute 6 and the inflation cone 8 are both disposed inside the lower tank. Specifically, the outer shell of the inflation cone 8 matches the shape of the inner wall of the lower tank. The flute 6 is positioned above the inflation cone 8.

[0032] The long axis of the flute 6 is along the inner wall of the pulverized coal lock hopper 5 and toward the bottom center of the pulverized coal lock hopper 5.

[0033] The flute 6 is connected to a pressurizing device 10 via a flute pressurizing pipe 102, and the inflation cone 8 is connected to the pressurizing device 10 via an inflation cone pressurizing pipe 103. Specifically, in this embodiment, the flute pressurizing pipe 102 is connected to a main pipe 101, which is connected to the pressurizing device 10; and the inflation cone pressurizing pipe 103 is connected to the main pipe 101. That is, both the flute pressurizing pipe 102 and the inflation cone pressurizing pipe 103 are connected to the pressurizing device 10 via the main pipe 101. Optionally, in this embodiment, the pressurizing device 10 is an air compressor or a fan.

[0034] The flute filling pipe 102 is equipped with a flute filling valve 1; the air cone filling pipe 103 is equipped with an air cone filling valve 3.

[0035] A flute charging sub-line 104 is provided on the flute charging pipe 102; an air-filled cone charging sub-line 105 is provided on the air-filled cone charging pipe 103; both ends of the flute charging sub-line 104 are respectively connected to the flute charging pipe 102; both ends of the flute charging sub-line 104 are respectively located at both ends of the flute charging valve 1; both ends of the air-filled cone charging sub-line 105 are respectively connected to the air-filled cone charging pipe 103; and both ends of the air-filled cone charging sub-line 105 are respectively located at both ends of the air-filled cone charging valve 3. The flute charging sub-line 104 and the air-filled cone charging sub-line 105 can ensure that a small amount of gas flows in when the flute charging pipe 102 and the air-filled cone charging pipe 103 need to be stopped for maintenance, so as to achieve continuous blowing of fly ash.

[0036] The flute tube pressurization sub-line 104 is provided with a flute tube sub-line orifice plate 2; the air cone pressurization sub-line 105 is provided with an air cone sub-line orifice plate 4. Both the flute tube sub-line orifice plate 2 and the air cone sub-line orifice plate 4 are used to limit the flow rate. By setting different numbers and diameters of orifice plates 2 and 4, the flow rate of the pressurized gas can be flexibly adjusted.

[0037] The flute tube 6 has multiple flute tube openings 7 on its side, and the flute tube openings 7 are arranged in columns along the long axis of the flute tube 6.

[0038] A through hole is provided at the center of the bottom of the inflatable cone 8.

[0039] The bottom of the flute 6 has several through holes.

[0040] Example 2 In this embodiment, the diameter of the flute tube opening 7 is 3.0 mm. In this embodiment, the flute tube opening 7 of the flute tube 6 faces the central axis of the coal powder lock hopper 5. A row of flute tube openings 7 is formed on the side of the flute tube 6, and these openings 7 are equidistant, with a spacing of 3 cm between them. In this embodiment, 5 cm of the row of flute tube openings 7 is left un-drilled at both the top and bottom ends of the flute tube 6.

[0041] In this embodiment, both the flute 6 and the air-filling cone 8 are made of sintered metal.

[0042] In this embodiment, each flute tube 6 is made by welding the ends of two 304L stainless steel tubes with a diameter of 4.5mm.

[0043] In this embodiment, the inflatable cone 8 has multiple inflatable cone openings 9, and the multiple inflatable cone openings 9 are arranged at equal intervals.

[0044] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A coal powder lock hopper bottom pressurization device, characterized in that, include: A coal powder lock hopper (5) is provided with a flute (6) at the bottom; the flute (6) is located inside the coal powder lock hopper (5); an air-filling cone (8) is provided at the bottom inside the coal powder lock hopper (5); a number of flute openings (7) are provided on the side of the flute (6), and a number of air-filling cone openings (9) are provided on the air-filling cone (8); both the flute (6) and the air-filling cone (8) are connected to a pressurizing device (10) through a pipe.

2. The coal powder lock hopper bottom pressurization device according to claim 1, characterized in that, The flute (6) is located on the inner wall of the pulverized coal lock hopper (5).

3. The coal powder lock hopper bottom pressurization device according to claim 2, characterized in that, The long axis of the flute (6) is along the inner wall of the pulverized coal lock hopper (5) toward the bottom center of the pulverized coal lock hopper (5).

4. The coal powder lock hopper bottom pressurization device according to claim 1, characterized in that, The flute (6) is connected to a pressurizing device (10) via a flute pressurizing pipe (102), and the inflation cone (8) is connected to the pressurizing device (10) via an inflation cone pressurizing pipe (103).

5. The coal powder lock hopper bottom pressurization device according to claim 4, characterized in that, The flute filling pipe (102) is provided with a flute filling valve (1); the air cone filling pipe (103) is provided with an air cone filling valve (3).

6. The coal powder lock hopper bottom pressurization device according to claim 5, characterized in that, The flute charging pipe (102) is provided with a flute charging sub-line (104); the air cone charging pipe (103) is provided with an air cone charging sub-line (105); the two ends of the flute charging sub-line (104) are respectively connected to the flute charging pipe (102); the two ends of the flute charging sub-line (104) are respectively located at the two ends of the flute charging valve (1); the two ends of the air cone charging sub-line (105) are respectively connected to the air cone charging pipe (103); and the two ends of the air cone charging sub-line (105) are respectively located at the two ends of the air cone charging valve (3).

7. The coal powder lock hopper bottom pressurization device according to claim 6, characterized in that, The flute tube pressurization sub-line (104) is provided with a flute tube sub-line orifice plate (2); the air cone pressurization sub-line (105) is provided with an air cone sub-line orifice plate (4).

8. The coal powder lock hopper bottom pressurization device according to claim 1, characterized in that, The flute (6) has multiple flute openings (7) on its side, and the flute openings (7) are arranged in columns along the long axis of the flute (6).

9. The coal powder lock hopper bottom pressurization device according to claim 1, characterized in that, A through hole is provided at the center of the bottom of the inflatable cone (8).

10. A coal powder lock hopper bottom pressurization device according to claim 1, characterized in that, The bottom of the flute (6) has several through holes.

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