A built-in co-flow intake high solid-gas ratio powder fuel supply device and method

Abstract

The application relates to the field of aerospace power technology, in particular to a built-in downstream air intake type high solid-gas ratio powder fuel supply device and method. The built-in downstream air intake type high solid-gas ratio powder fuel supply device comprises a device main body, a rigid piston is slidably connected in the device main body, the rigid piston divides the inner cavity of the device main body into a driving gas cavity and a powder storage cavity, a fluidization cavity is connected to the end of the powder storage cavity away from the driving gas cavity, a downstream air intake structure is arranged at the end of the fluidization cavity connected with the powder storage cavity, a gas-solid two-phase outlet is arranged at the end of the fluidization cavity away from the powder storage cavity, the downstream air intake structure comprises a plurality of air inlet branches, a plurality of fluidization gas air inlets are arranged on each air inlet branch, the fluidization gas air inlets input fluidization gas into the fluidization cavity, and the fluidization gas and the powder fuel are mixed and output from the gas-solid two-phase outlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerospace power technology, in particular to an internal parallel-flow air intake type high solid-gas ratio powder fuel supply device and method. BACKGROUND

[0002] A powder engine is a new type of engine that uses metal powder (magnesium, aluminum, boron, etc.) as fuel and liquid or powder or gas as an oxidizer. Due to its high heat value, long-term storage, strong environmental adaptability, low manufacturing cost, safety and easy maintenance, as well as the advantages of liquid engine such as convenient flow control, multi-pulse start-stop, flexible energy management, it is generally believed by scholars at home and abroad that it is the best way to fundamentally achieve super-speed, super-long-range cross-medium navigation.

[0003] The powder fuel delivery system is one of the core components of the powder engine. The stability of powder fuel delivery and flow regulation directly affect the particle ignition and combustion performance, and further affect the multi-pulse start and thrust regulation function of the engine. The high energy density, deep energy control, and high mass ratio of the powder engine determine that the powder delivery system must have the characteristics of compact structure, reliable operation, efficient supply, and accurate flow regulation. Gas-driven piston combined with pneumatic conveying is considered to be the most promising powder delivery scheme, and its ideal state is that the dense powder is fluidized under the action of fluidizing gas and is stably delivered under the condition of choking. The driving piston pushes the powder forward to realize the continuity of the stable delivery process. The compactness and lightweight requirements of the powder engine and the high specific impulse power performance require that the dense phase powder fuel be delivered with a high solid-gas ratio.

[0004] Powder engine research is still in the stage of single technology research and feasibility verification, and powder fuel delivery is one of the key technologies that need to be overcome. The existing research mainly uses front-end ring gap or ring hole air intake structure to realize long-term stable transportation, but the solid-gas ratio is generally low, which cannot meet the lightweight, compact and efficient development of the powder engine. SUMMARY

[0005] The purpose of the present application is to provide a powder fuel supply device that solves the problem of large use of fluidizing gas and low solid-gas ratio of the powder fuel supply device in the prior art.

[0006] In order to solve the above problems, the technical scheme of the internal parallel-flow air intake type high solid-gas ratio powder fuel supply device of the present application is:

[0007] The utility model provides a built-in downflow air intake formula high solid gas ratio powder fuel supply device, include the device main body that includes, the rigid piston is slidably connected in the device main body, the rigid piston divides the inner chamber of device main body into drive gas cavity and powder storage cavity, drive gas cavity far from the one end of powder storage cavity input drive gas, the one end of powder storage cavity far from drive gas cavity is connected with fluidization cavity, powder fuel is loaded in powder storage cavity and fluidization cavity, the one end of fluidization cavity connection powder storage cavity is provided with downflow air intake structure, and the one end of fluidization cavity far from powder storage cavity is provided with gas solid two phase outlet, the downflow air intake structure includes a plurality of air intake branch, and a plurality of fluidization gas air inlet holes are provided on each air intake branch, fluidization gas air inlet hole inputs fluidization gas to fluidization cavity, and makes fluidization gas and powder fuel from gas solid two phase outlet mixed output.

[0008] Further, the one end of the fluidization cavity far from the downflow air intake structure is provided with a conical cover, the conical port of the conical cover is the gas solid two phase outlet, the plurality of fluidization gas air inlet holes are arranged in parallel with the conical surface of the conical cover and are arranged opposite to the gas solid two phase outlet.

[0009] Further, the one end of the plurality of air intake branches converges on the central axis of the fluidization cavity, and the plurality of fluidization gas air inlet holes on each air intake branch are arranged along the length direction of the air intake branch.

[0010] Further, the downflow air intake structure is a hollow circular structure, the downflow air intake structure is coaxially arranged with the drive gas cavity, the powder storage cavity and the fluidization cavity, and the plurality of fluidization gas air inlet holes on each air intake branch are opposite to the gas solid two phase outlet through the hollow position.

[0011] Further, each air intake branch is individually connected to the gas source through a fluidization gas supply pipe to realize independent air intake of each branch.

[0012] Further, the inside of the air intake branch is provided with a metal powder sintering filter tube.

[0013] Further, the one end of the drive gas cavity far from the powder storage cavity is provided with a powder tank rear chamber, the one end of the powder tank rear chamber far from the powder storage cavity is provided with a powder tank rear chamber end cover, and the central position of the powder tank rear chamber end cover along the central axis is provided with a drive gas air inlet hole.

[0014] Further, the conical wall of the conical cover is provided with a fluidization chamber pressure measurement hole and a fluidization chamber pressure sensor connecting seat, the fluidization chamber pressure sensor connecting seat is installed on the outer wall of the conical cover and corresponds to the position of the fluidization chamber pressure measurement hole, a pressure sensor is connected to the fluidization chamber pressure sensor connecting seat, and the pressure sensor is used for monitoring the pressure in the fluidization cavity.

[0015] Further, the powder storage cavity and the inner wall of the connection between the co-flow air inlet structure and the conical cover are provided with matched fixing grooves and bosses, and the outer wall is welded with a flange.

[0016] The application also provides an internal co-flow air inlet high solid-gas ratio powder fuel supply method based on the above internal co-flow air inlet high solid-gas ratio powder fuel supply device.

[0017] An internal co-flow air inlet high solid-gas ratio powder fuel supply method comprises the following steps:

[0018] S1, filling the powder fuel into the powder storage cavity and the fluidization cavity;

[0019] S2, driving the driving gas in the gas cavity to move the rigid piston to the powder storage cavity to compress the powder fuel in the powder storage cavity;

[0020] S3, stopping the driving gas, passing the fluidization gas into the fluidization cavity through the co-flow air inlet structure to stabilize the pressure in the fluidization cavity; at the same time, adjusting the pressure of the driving gas cavity according to the set driving gas cavity operating pressure;

[0021] S4, opening the gas-solid two-phase outlet, and mixing and outputting the fluidization gas and the powder fuel from the gas-solid two-phase outlet.

[0022] Compared with the prior art, the internal co-flow air inlet high solid-gas ratio powder fuel supply device and method can pass the fluidization gas into the fluidization cavity in the powder fuel supply device through the co-flow air inlet structure in an internal multi-position and small flow manner, can expand the fluidization gas inlet range and the powder action area, can make the fluidization gas inlet direction and the fluidization gas flowing area consistent with the powder flow direction and the powder flowing area, can strengthen the fluidization gas and the powder fuel interaction, and can improve the fluidization gas transport capacity of the powder fuel. The gas inlet branch of the supply device is located at the fluidization cavity inlet, can ensure that the powder has a large flow space, can penetrate the dense powder column moving forward, can reduce the powder consolidation degree in the fluidization cavity, and can improve the powder fluidity. Through the above co-flow air inlet structure improvement, the internal co-flow air inlet high solid-gas ratio powder fuel supply device can improve the solid-gas ratio to more than 100 under the premise of stable transport, can greatly save the gas usage amount compared with the powder fuel supply system with a similar size and a surface ring hole air inlet of a conical contraction section in the prior art, can significantly improve the powder fuel transport efficiency, and has a very broad engineering application prospect.

[0023] The end of the fluidization cavity away from the structure of the air inlet is provided with a conical cover, the conical port of the conical cover is a gas-solid two-phase outlet, the plurality of fluidization gas air inlets are arranged in parallel with the conical surface of the conical cover and opposite to the gas-solid two-phase outlet, which fully ensures that the fluidization gas air inlet direction and the flowing area are consistent with the powder flow direction and the flowing area, and improves the fluidity of the powder fuel.

[0024] The plurality of air inlet branches converge on the central axis of the fluidization cavity, and the plurality of fluidization gas air inlets on each air inlet branch are arranged along the length direction of the air inlet branch, which is simple in structure and facilitates uniformity of air inlet.

[0025] The plurality of air inlet branches converge on the central axis of the fluidization cavity, and the plurality of fluidization gas air inlets on each air inlet branch are arranged along the length direction of the air inlet branch, which is simple in structure and facilitates uniformity of air inlet.

[0026] The inside of the air inlet branch is provided with a metal powder sintering filter tube, the filter tube can be replaced in advance according to the particle size of the powder fuel actually used, and under the premise of ensuring the strength of the filter tube and the flow of the fluidization gas, the reverse entry of the particles with small particle size into the fluidization gas pipeline due to the large fluidization gas outlet is prevented to cause the blockage of the air outlet.

[0027] The end of the driving gas cavity away from the powder storage cavity is provided with a powder tank rear chamber, the end of the powder tank rear chamber away from the powder storage cavity is provided with a powder tank rear chamber end cover, and the driving gas inlet hole is arranged on the powder tank rear chamber end cover at the central position along the central axis.

[0028] The conical wall of the conical cover is provided with a fluidization chamber pressure measuring hole and a fluidization chamber pressure sensor connecting seat, the fluidization chamber pressure sensor connecting seat is installed on the outer wall of the conical cover and corresponds to the position of the fluidization chamber pressure measuring hole, a pressure sensor is connected to the fluidization chamber pressure sensor connecting seat, and the pressure sensor is used for monitoring the pressure in the fluidization cavity to prevent the instability of the pressure in the fluidization cavity from causing the powder fuel to be unable to be supplied. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a quarter sectional view of the built-in air inlet type high solid-gas ratio powder fuel supply device according to an embodiment of the present application;

[0030] Figure 2 is a front view of the air inlet structure of the built-in air inlet type high solid-gas ratio powder fuel supply device according to an embodiment of the present application;

[0031] Figure 3is a built-in flow intake structure sectional view of the high solid-gas ratio powder fuel supply device of the present application;

[0032] In the figure, 1 is a flow intake structure, 2 is an intake branch, 3 is a fluidized gas intake hole, 4 is a rigid piston, 5 is a conical cover, 6 is a fluidized gas supply pipe, 7 is a driving gas intake hole, 8 is a gas-solid two-phase outlet, 9 is a metal powder sintering filter tube, 10 is a powder tank rear chamber, 11 is a driving gas cavity pressure measurement hole, 12 is a safety valve exhaust hole, 13 is a polytetrafluoroethylene sealing gasket, 14 is a double-headed stud, 15 is a nut, 16 is a powder tank straight pipe section, 17 is a rubber sealing ring, 18 is a fluidized chamber pressure measurement hole, 19 is a hollow screw, and 20 is an aviation plug connection hole. DETAILED DESCRIPTION

[0033] As cited in the background, the prior art powder fuel supply device has a large amount of fluidized gas usage and a low solid-gas ratio of the powder fuel supply device. Therefore, the present application provides a built-in flow intake high solid-gas ratio powder fuel supply device, which comprises: a device main body, a rigid piston is slidably connected in the device main body, for dividing the inner cavity of the device main body into a driving gas cavity and a powder storage cavity, and can slide in the device main body; a driving gas cavity inputs driving gas at one end away from the powder storage cavity, for driving the rigid piston; a flow chamber is connected to one end of the powder storage cavity away from the driving gas cavity, and the powder storage cavity and the flow chamber are filled with powder fuel; the flow chamber connected to the powder storage cavity is provided with a flow intake structure, for inputting fluidized gas; the flow chamber away from the powder storage cavity is provided with a gas-solid two-phase outlet, for outputting fluidized gas and powder fuel; the flow intake structure comprises a plurality of intake branches, and each intake branch is provided with a plurality of fluidized gas intake holes, for internal multi-position and small-flow input of fluidized gas, and for mixing of fluidized gas and powder fuel from the gas-solid two-phase outlet.

[0034] The built-in flow intake high solid-gas ratio powder fuel supply device of the present application improves the fluidized transport capacity of fluidized gas to powder fuel and the flowability of powder fuel into the flow chamber, and at the same time, the solid-gas ratio can be increased to more than 100 under the premise of stable transport. Compared with the powder fuel supply system of the prior art with similar size and the same conical tapered section surface ring hole intake controlled by gas pressure, the maximum solid-gas ratio is about 20, which greatly saves the gas usage, significantly improves the powder fuel delivery efficiency, and has a very broad engineering application prospect.

[0035] Embodiments of the present application are described below in the detailed description and illustrated in the accompanying drawings by which like or similar elements, symbols and / or numerals are meant to refer to like or similar elements, symbols or functions having similar characteristics. The embodiments described below are exemplary in nature and are intended to be illustrative of the present application rather than to limit the same.

[0036] It should be noted that the terms "first", "second", and so on as used in the description and the claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such a process, method, product or device.

[0037] Specific embodiment 1 of the built-in co-flow intake high solid-gas ratio powder fuel supply device of the present application:

[0038] In this embodiment, as shown in Figure 1 , Figure 2 , the present application provides a built-in co-flow intake high solid-gas ratio powder fuel supply device, which comprises a device main body, a rigid piston 4 is slidably connected in the device main body, the rigid piston 4 divides the inner cavity of the device main body into a driving gas cavity and a powder storage cavity, the driving gas cavity is connected to an input of driving gas at one end away from the powder storage cavity, the powder storage cavity is connected to a fluidization cavity at one end away from the driving gas cavity, the powder storage cavity and the fluidization cavity are filled with powder fuel, the powder storage cavity is connected to the fluidization cavity at one end away from the driving gas cavity, the fluidization cavity is provided with a co-flow intake structure 1 at one end connected to the powder storage cavity, and the fluidization cavity is provided with a gas-solid two-phase outlet 8 at one end away from the powder storage cavity, the co-flow intake structure 1 comprises a plurality of intake branches 2, and each intake branch 2 is provided with a plurality of fluidization gas intake holes 3, the fluidization gas intake holes 3 are used to input fluidization gas into the fluidization cavity and mix with the powder fuel to be output from the gas-solid two-phase outlet 8.

[0039] Specifically, the device body is a powder tank straight pipe section 16, the rigid piston 4 is slidingly arranged in the powder tank straight pipe section 16, and the powder tank straight pipe section 16 is divided into a driving gas cavity and a powder storage cavity. A tapered cover 5 is arranged at an end of the fluidization cavity away from the co-flow air inlet structure 1, forming a contraction section of the fluidization cavity, the co-flow air inlet structure 1 and the tapered cover 5 are connected through a stud bolt 14 and a nut 15, the stud bolt 14 is fastened through the nut 15, and a metal gasket is arranged between the stud bolt 14 and the nut 15. A tapered port of the tapered cover 5 is a gas-solid two-phase outlet 8, a plurality of fluidization gas inlets 3 are arranged in parallel with a tapered surface of the tapered powder tank cover and opposite to the gas-solid two-phase outlet 8, so that the fluidization gas and the powder fuel flow in parallel. The gas-solid two-phase outlet 8 is connected to other pipelines of an external experimental system in a threaded manner.

[0040] In other embodiments, an oval cover is arranged at an end of the fluidization cavity away from the co-flow air inlet structure 1, and the oval cover plays a sealing cover role, an end of the oval cover away from the fluidization gas inlet 3 is provided with the gas-solid two-phase outlet 8, the fluidization gas inlet 3 inputs the fluidization gas to the fluidization cavity, and the fluidization gas and the powder fuel are mixed and output from the gas-solid two-phase outlet 8.

[0041] In other embodiments, the plurality of fluidization gas inlets 3 can not be arranged opposite to the gas-solid two-phase outlet 8, as long as the fluidization gas inlets 3 input the fluidization gas to the fluidization cavity, and the fluidization gas and the powder fuel are mixed and output from the gas-solid two-phase outlet 8.

[0042] Specific embodiment 2 of the built-in co-flow air inlet type high solid-gas ratio powder fuel supply device of the present application:

[0043] On the basis of the technical concept of the present application described above, or on the basis of the specific embodiments of the present application described above, another embodiment is provided below.

[0044] In the embodiment, one end of the plurality of air inlet branches 2 converges on the central axis of the fluidization cavity, the plurality of fluidization gas inlet holes 3 on each air inlet branch 2 is arranged along the length direction of the air inlet branch 2, and the plurality of fluidization gas inlet holes 3 is arranged opposite to the gas-solid two-phase outlet 8. The flow-through air inlet structure 1 is a hollow circular structure, the flow-through air inlet structure 1 is coaxially arranged with the driving gas cavity, the powder storage cavity and the fluidization cavity, and the plurality of fluidization gas inlet holes 3 on each air inlet branch 2 is opposite to the gas-solid two-phase outlet 8 through the hollow position. Specifically, one end of each air inlet branch 2 is welded inside the flange ring of the flow-through air inlet structure 1, and the other end is welded to the center of the flow-through air inlet structure 1. Each air inlet branch 2 is individually connected to the gas source through the fluidization gas supply pipe 6, realizing independent air inlet of each branch and uniform entry into the powder fuel supply device. Each fluidization gas supply pipe 6 is connected to one air inlet branch 2, and the joint of the fluidization gas supply pipe 6 is welded to the outside of the flange of the flow-through air inlet structure 1, and each fluidization gas supply pipe 6 is connected to the gas source in a threaded manner.

[0045] In the embodiment, the inside of the air inlet branch 2 is provided with a metal powder sintering filter tube 9. One end of the metal powder sintering filter tube 9 converges on the center of the air inlet branch 2, and the other end is fixed in the gas supply pipe joint of the fluidization gas supply pipe 6 by using a hollow screw 19. The filter level of the filter tube can be replaced in advance according to the actual use of the powder fuel particle size, and under the premise of ensuring the strength of the filter tube itself and the flow rate of the fluidization gas, the reverse entry of the particles with small particle size and the large fluidization gas outlet into the fluidization gas pipeline is prevented to cause the blockage of the outlet hole.

[0046] In other embodiments, the plurality of air inlet branches 2 can be arranged in a cross or parallel manner, the plurality of fluidization gas inlet holes 3 on each air inlet branch 2 is arranged along the length direction of the air inlet branch 2, and the plurality of fluidization gas inlet holes 3 on each air inlet branch 2 is opposite to the gas-solid two-phase outlet 8 through the hollow position.

[0047] Specific embodiment 3 of the built-in flow-through air inlet type high solid-gas ratio powder fuel supply device of the present application:

[0048] On the basis of the technical concept of the present application described above, or on the basis of the specific embodiments of the present application described above, another embodiment is provided as follows.

[0049] In the embodiment, the end of the driving gas cavity away from the powder storage cavity is provided with a powder bin rear cavity 10, the end of the powder bin rear cavity 10 away from the powder storage cavity is provided with a powder bin rear cavity 10 end cover, the driving gas inlet hole 7 is arranged at the central position on the powder bin rear cavity 10 end cover along the central axis, the driving gas inlet hole 7 is connected with the driving gas inlet pipe, and the driving gas inlet pipe is fixedly connected with the powder bin rear cavity 10 in a threaded manner.

[0050] Meanwhile, the displacement sensor and the pressure sensor are arranged outside the powder tank rear chamber 10, and the aviation plug connection hole 20 and the driving gas cavity pressure measurement hole 11 are arranged on the cylinder wall. The displacement sensor current signal is transmitted through the aviation plug connection hole 20, and the driving gas cavity pressure monitored by the pressure sensor is transmitted through the driving gas cavity pressure measurement hole 11. Specifically, the aviation plug connection hole 20 for transmitting the displacement sensor current signal and the driving gas cavity pressure sensor connecting seat for transmitting the driving gas cavity pressure measured by the pressure sensor are arranged on the cylinder wall of the powder tank rear chamber 10. The aviation plug connection hole 20 is a through hole on the cylinder wall of the powder tank rear chamber 10, and the aviation plug is fixedly connected to the powder tank rear chamber 10 by welding, thereby playing a role of transmitting the displacement sensor current signal inside the device. The driving gas cavity pressure measurement hole 11 is arranged on the cylinder wall of the powder tank rear chamber 10, the driving gas cavity pressure sensor connecting seat is welded to the corresponding position of the driving gas cavity pressure measurement hole 11 on the outer wall of the powder tank rear chamber 10, and the pressure sensor is fixedly connected to the driving gas cavity pressure sensor connecting seat by screwing, thereby playing a role of monitoring the pressure in the driving gas cavity during the experiment.

[0051] The safety valve exhaust hole 12 is arranged on the side wall of the powder tank rear chamber 10, and the safety valve connecting seat is arranged on the outer wall of the powder tank rear chamber 10 and corresponds to the position of the safety valve exhaust hole 12, thereby adjusting the pressure in the device. Specifically, the safety valve exhaust hole 12 is arranged on the cylinder wall of the powder tank rear chamber 10, the safety valve connecting seat is welded to the corresponding position of the safety valve exhaust hole 12 on the outer wall of the powder tank rear chamber 10, and the safety valve is fixedly connected to the powder tank rear chamber 10 by screwing, thereby ensuring that the pressure in the device is always within the allowable range and avoiding danger.

[0052] In this embodiment, the conical wall of the conical cover 5 is provided with the fluidization chamber pressure measurement hole 18 and the fluidization chamber pressure sensor connecting seat, the fluidization chamber pressure sensor connecting seat is mounted on the outer wall of the conical cover 5 and corresponds to the position of the fluidization chamber pressure measurement hole 18, the fluidization chamber pressure sensor connecting seat is connected with the pressure sensor, and the pressure sensor is used for measuring the pressure in the fluidization cavity. Specifically, the fluidization chamber pressure measurement hole 18 is arranged at the head position of the conical cover 5, the fluidization cavity pressure sensor connecting seat is welded to the corresponding position of the fluidization cavity pressure measurement hole 18 on the outer wall of the conical cover, and the pressure sensor is fixedly connected to the fluidization cavity pressure sensor connecting seat by screwing, thereby playing a role of measuring the pressure in the fluidization cavity during the experiment.

[0053] The inner cavity of the connection between the powder box rear chamber 10 and the driving gas cavity, the connection between the powder storage cavity and the straight-flow air inlet structure 1, and the connection between the straight-flow air inlet structure 1 and the conical cover 5 is provided with a fixed groove and a boss matched with each other, and a flange is welded on the outer wall. Specifically, the fixed groove and the boss are designed to preliminarily fix the position when the device is connected, so as to avoid eccentricity of each part of the device and affect the air tightness of the device. Twelve double-headed studs 14 are arranged on the flange, and the double-headed studs 14 are fixed in the holes. The connection between the powder box rear chamber 10 and the driving gas cavity, the connection between the powder storage cavity and the straight-flow air inlet structure 1, and the connection between the straight-flow air inlet structure 1 and the conical cover 5 are all provided with O-shaped polytetrafluoroethylene sealing gaskets 13, and an O-shaped rubber sealing ring 17 is arranged between the device body and the rigid piston 4. Specifically, the O-shaped polytetrafluoroethylene sealing gasket 13 at the connection between the powder box rear chamber 10 and the driving gas cavity is used to prevent the driving gas from leaking out of the driving gas cavity; the O-shaped polytetrafluoroethylene sealing gaskets 13 at the connection between the powder storage cavity and the straight-flow air inlet structure 1 and the connection between the straight-flow air inlet structure 1 and the conical cover 5 are used to prevent the fluidized gas from leaking out of the powder storage tank and the fluidized cavity; and the O-shaped rubber sealing ring 17 between the device body and the rigid piston 4 is used to isolate the driving gas cavity, the powder storage cavity and the fluidized cavity, so as to avoid the mutual flow of the gases and maintain the pressure difference before and after the piston, thereby ensuring the driving force of the piston.

[0054] The specific working process of the built-in straight-flow air inlet type high solid-gas ratio powder fuel supply device is as follows: first, the powder box straight pipe section 16, the straight-flow air inlet structure 1 and the conical cover 5 are connected, the powder box rear chamber 10 is removed, the device is vertically erected, and the powder fuel is filled into the powder storage tank and the fluidized cavity; then, the rigid piston 4 is placed in the powder box straight pipe section 16, the powder box straight pipe section 16 is divided into a driving gas cavity and a powder storage cavity, the powder fuel is slowly pushed, then the device is slowly placed horizontally, and the powder box rear chamber 10 is connected; then, the driving gas is introduced through the driving gas inlet hole 7 on the powder box rear chamber 10, the driving gas flows into the driving gas cavity, under the action of the driving pressure, the rigid piston 4 gradually moves forward, and the powder fuel is compressed; then, after the rigid piston 4 is stationary, the fluidized gas is introduced, the pressure of the fluidized cavity is stabilized, the gas-solid two-phase outlet 8 is opened, the powder fuel supply experiment is started, and when the powder fuel is supplied, the fluidized gas flows into the fluidized cavity through the fluidized gas inlet hole 3 on the air inlet branch 2 after passing through the fluidized gas supply pipe 6 in the flange inside the straight-flow air inlet structure 1, and is mixed and fluidized with the powder fuel in the fluidized cavity, and the formed gas-solid two-phase flow flows out of the device through the gas-solid two-phase outlet 8.

[0055] Specific embodiment 1 of the built-in straight-flow air inlet type high solid-gas ratio powder fuel supply method of the present application is as follows:

[0056] First, the powder fuel is filled into the powder storage cavity and the fluidized cavity;

[0057] Secondly, the driving gas is introduced into the driving gas cavity to move the rigid piston 4 to the powder storage cavity, and the powder fuel in the powder storage cavity is compressed;

[0058] Then, the introduction of the driving gas is stopped, the fluidization gas is introduced into the fluidization cavity through the upstream gas inlet structure 1 to stabilize the pressure in the fluidization cavity; at the same time, the pressure of the driving gas cavity is adjusted according to the set driving gas cavity operating pressure;

[0059] Finally, the gas-solid two-phase outlet 8 is opened, and the fluidization gas and the powder fuel are mixed and output from the gas-solid two-phase outlet 8.

[0060] Specifically, the built-in upstream gas inlet type high solid-gas ratio powder fuel supply method of the present application comprises the following steps:

[0061] Firstly, the powder fuel is filled into the powder storage tank and the fluidization cavity;

[0062] Subsequently, the driving gas is introduced into the driving gas cavity to move the rigid piston 4 to the powder storage cavity, and the powder fuel in the powder storage cavity is compressed under the action of the driving pressure;

[0063] Then, the introduction of the driving gas is stopped, the fluidization gas is introduced into the fluidization cavity through the upstream gas inlet structure 1 to stabilize the pressure in the fluidization cavity; at the same time, the pressure of the driving gas cavity is adjusted according to the set driving gas cavity operating pressure;

[0064] Finally, the gas-solid two-phase outlet 8 is opened, and the fluidization gas flows into the fluidization cavity from the fluidization gas inlet hole 3 on the gas inlet branch 2 after passing through the fluidization gas supply pipe 6 inside the flange of the upstream gas inlet structure 1, and is mixed and fluidized with the powder fuel in the fluidization cavity, and the formed gas-solid two-phase flow flows out of the device through the gas-solid two-phase outlet 8.

[0065] Here, those skilled in the art can understand that the specific operations of each step in the above built-in upstream gas inlet type high solid-gas ratio powder fuel supply method have been described in detail above with reference to the built-in upstream gas inlet type high solid-gas ratio powder fuel supply device Figures 1 to 3 Therefore, the repeated description will be omitted.

[0066] The above is only a preferred embodiment of the present application, and is not used to limit the present application, the patent protection scope of the present application is subject to the claims, any equivalent structural changes made by applying the contents of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A built-in co-flow intake type high solid-gas ratio powder fuel supply device, characterized by comprising: It comprises: The device body, a rigid piston (4) is connected in the device body, the rigid piston (4) will the inner cavity of the device body be divided into drive gas cavity and powder storage cavity, the drive gas cavity is inputted drive gas away from the one end of powder storage cavity, the powder storage cavity is connected with fluidization cavity on the one end away from the drive gas cavity, the powder storage cavity and fluidization cavity are loaded with powder fuel, the one end of fluidization cavity is provided with the structure (1) of the air inlet of the flow, the one end of fluidization cavity is provided with the gas-solid two-phase outlet (8) away from the powder storage cavity, the structure (1) of the air inlet of the flow includes multiple air inlet branch (2), and multiple fluidization gas air inlet holes (3) are provided on each air inlet branch (2), the fluidization gas air inlet hole (3) is inputted fluidization gas to fluidization cavity, and fluidization gas and powder fuel are mixed and outputted from the gas-solid two-phase outlet (8);The one end away from the structure (1) of the air inlet of the flow is provided with the conical cover (5) on the fluidization cavity, the conical mouth of the conical cover (5) is the gas-solid two-phase outlet (8), the multiple fluidization gas air inlet holes (3) are arranged in parallel with the conical surface of the conical cover (5), and are arranged opposite to the gas-solid two-phase outlet (8);The multiple air inlet branch (2) is converged on the central axis of the fluidization cavity, and the multiple fluidization gas air inlet holes (3) on each air inlet branch (2) are arranged along the length direction of the air inlet branch (2).

2. The built-in concurrent flow intake high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by The structure (1) of the air inlet of the flow is a hollow circular structure, the structure (1) of the air inlet of the flow is coaxially arranged with the drive gas cavity, the powder storage cavity and the fluidization cavity, and the multiple fluidization gas air inlet holes (3) on each air inlet branch (2) are opposite to the gas-solid two-phase outlet (8) through the hollow position.

3. The built-in concurrent flow gas injection type high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by Each air inlet branch (2) is individually communicated with the gas source through a fluidization gas supply pipe (6), so that each branch realizes independent air inlet.

4. The built-in concurrent flow gas injection type high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by The inside of the air inlet branch (2) is provided with a metal powder sintering filter tube (9).

5. The built-in concurrent flow gas injection type high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by The one end away from the powder storage cavity of the drive gas cavity is provided with a powder box rear chamber (10), the one end away from the powder storage cavity of the powder box rear chamber (10) is provided with a powder box rear chamber (10) end cover, and the powder box rear chamber (10) end cover is provided with a drive gas air inlet hole (7) at the central position along the central axis.

6. The built-in concurrent flow gas injection type high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by The conical wall of the conical cover (5) is provided with a fluidization chamber pressure measuring hole (18) and a fluidization chamber pressure sensor connecting seat, the fluidization chamber pressure sensor connecting seat is installed on the outer wall of the conical cover (5), and is arranged at a position corresponding to the fluidization chamber pressure measuring hole (18), a pressure sensor is connected to the fluidization chamber pressure sensor connecting seat, and the pressure sensor is used for monitoring the pressure in the fluidization cavity.

7. The built-in concurrent flow gas injection type high solid-gas ratio powder fuel supply apparatus according to claim 1, characterized by The inner wall of the connection between the powder storage cavity, the structure (1) of the air inlet of the flow and the conical cover (5) is provided with a matching fixed groove and a boss, and the outer wall is welded with a flange.

8. A built-in co-flow intake high solid-gas ratio powder fuel supply method characterized by, The built-in air inlet type high solid-gas ratio powder fuel supply device according to any one of claims 1-7 comprises the following steps: S1, the powder fuel is filled into the powder storage cavity and the fluidization cavity; S2, driving gas is introduced into the driving gas cavity to make the rigid piston (4) move towards the powder storage cavity, and the powder fuel in the powder storage cavity is compressed; S3, stop introducing the driving gas, introduce the fluidizing gas into the fluidizing cavity through the in-flow air intake structure (1) to make the pressure in the fluidizing cavity stable; at the same time, the pressure of the driving gas cavity is adjusted according to the set driving gas cavity operating pressure; S4, open the gas-solid two-phase outlet (8), and mix and output the fluidizing gas and the powder fuel from the gas-solid two-phase outlet (8).

Images