WO2010108386A1 - 煤粉浓缩装置和包含该煤粉浓缩装置的煤粉燃烧器 - Google Patents
煤粉浓缩装置和包含该煤粉浓缩装置的煤粉燃烧器 Download PDFInfo
- Publication number
- WO2010108386A1 WO2010108386A1 PCT/CN2010/000354 CN2010000354W WO2010108386A1 WO 2010108386 A1 WO2010108386 A1 WO 2010108386A1 CN 2010000354 W CN2010000354 W CN 2010000354W WO 2010108386 A1 WO2010108386 A1 WO 2010108386A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pulverized coal
- bowl
- concentrating device
- rear portion
- front portion
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
Definitions
- Pulverized coal concentrating device and pulverized coal burner comprising the pulverized coal concentrating device
- the present invention relates to a pulverized coal concentrating device for a coal-fired boiler pulverized coal burner, particularly an internal combustion pulverized coal burner, and a pulverized coal burner including the pulverized coal concentrating device.
- the pulverized coal is ignited in the central combustion cylinder 1 by the ignition source, and the lower combustion cylinder is ignited by the ignited pulverized coal flame in the central combustion cylinder 1.
- the pulverized coal of 2 the pulverized coal in the lower combustion cylinder 3 is ignited step by step, and the pulverized coal in the last combustion cylinder 4 is burned into the furnace.
- FIG. 13 discloses a plasma burner, as shown in Fig. 13, which comprises at least two stages of combustion cylinders 14, 16 and for igniting the first stage combustion cylinder 14 of the at least two stage combustion cylinders a plasma generator 31 of pulverized coal, wherein the combustion flame of the upper combustion cylinder 14 ignites the pulverized coal in the lower combustion cylinder 16 or is further burned in the lower combustion cylinder 16 with the supplemental air, wherein the plasma
- the axial direction of the generator is parallel to the direction in which the pulverized coal air stream 32 enters the first stage combustion cylinder 14, while being parallel to the axis of the combustion cylinders 14,16.
- the plasma pulverized coal burner disclosed in the above patent is a multi-stage cylinder structure, and exists The following disadvantages: The plasma pulverized coal burner is not adaptable to coal quality, wind speed and pulverized coal concentration, and the ignition stability and reliability are insufficient.
- the object of the present invention is to provide a pulverized coal concentrating device and a pulverized coal burner using the pulverized coal concentrating device, which is particularly suitable for an internal combustion type igniting and igniting pulverized coal burner to improve the pulverized coal burner to coal quality , wind speed and adaptability of pulverized coal concentration.
- a pulverized coal concentrating device which is fixedly disposed inside a pulverized coal burner and includes a front portion and a rear portion, wherein the front portion is designed as a bowl-like structure for guiding and concentrating coal
- a gas-solid two-phase flow composed of powder and air hereinafter referred to as "wind powder flow”
- the rear portion is designed as a cylindrical structure for maintaining a moderate extension of the dense phase of the wind powder flow.
- the pulverized coal concentrating device of the present invention is designed in one piece, that is, the front portion and the rear portion are integrally formed and the front portion and/or the rear portion are fixedly disposed; or, the pulverized coal concentrating device is designed In the case of a split type, the front portion and the rear portion are separately formed, wherein the front portion is connected to the rear portion and the front portion and/or the rear portion are fixedly disposed, or the front portion The portion is spaced apart from the rear portion by a distance and the front portion and the rear portion are fixedly disposed, respectively.
- the above distance may be specifically determined according to factors such as coal quality, structural size of each component, pulverized coal ignition and stable combustion requirements, and aerodynamic field characteristics in the furnace.
- the pulverized coal concentrating device of the present invention the pulverized coal is separated by concentration in the front part of the bowl-like structure, a part of the higher concentration of the air powder flows into the bowl-like structure, and the lower concentration of the air-powder flow enters the lower combustion tube. , so that the pulverized coal gas flow in the bowl structure is concentrated to a concentration level suitable for ignition; at the same time, due to the diversion of the bowl structure, the coal powder is forcibly introduced into the plasma flame zone (or other ignition heat source) to generate high temperature ignition.
- the pulverized coal volatiles and the coke particles are simultaneously ignited to achieve the initial ignition process.
- the heterogeneous combustion the pulverized coal particles are quickly ignited.
- the concentrated phase of pulverized coal can be maintained (divided into a dense phase zone and a light phase zone for the concentration of coal powder, and a region with a large proportion of coal powder in the wind powder flow is called a dense phase zone)
- the moderate extension of the rest of the area acts as a heat collector to control the effective source of ignition in a narrow area, preventing heat from dissipating from the fire source, and facilitating the formation of a stable flame before igniting the external pulverized coal particles of the concentrating device.
- the front portion has a bowl opening and a bowl bottom opening
- the inlet of the rear portion is connected to the bowl mouth or the bowl bottom opening
- the inlet of the rear portion is connected to the front portion
- the mouth of the bowl is on the wall between the bowl and the bottom of the bowl.
- the bowl bottom of an additional bowl member is attached to the outlet of the cylindrical rear portion, and the bowl opening of the bowl front portion and the bowl opening of the additional bowl member are facing away from each other.
- a vortex zone can be formed in the vicinity of the additional bowl-like structure to enhance the combustion of the pulverized coal flame.
- the size of the bowl is larger than the size of the bowl bottom.
- a through hole is formed in the wall of the bowl-shaped structure of the front part, in particular near the bottom of the bowl.
- the axial length of the front portion is smaller than the axial length of the rear portion.
- the bowl-shaped structure of the front portion is formed by connecting a plurality of planes to each other or by a curved surface or a combination of both.
- the bowl-like structure of the front portion is preferably constituted by a curved surface.
- the tubular structure of the rear portion is formed by connecting a plurality of planes to each other or by a curved surface or a combination of both.
- the cylindrical structure of the rear portion is preferably constituted by a circular curved surface.
- the tubular structure is horizontal straight, gradually Expanding or shrinking cylinders, or a combination of them.
- the divergent structure of the rear part is preferable, which can reduce the flow velocity of the wind powder flow and increase the residence time of the coal powder in the fire stage.
- a tapered structure can be used to enhance the fire collecting ability. Therefore, the rear portion preferably includes at least one diverging cylinder and/or a tapered cylinder.
- the bowl wall of the bowl-shaped structure of the front portion is provided with a through hole.
- a through hole is formed in the vicinity of the bowl bottom of the bowl portion of the front portion.
- the outlet edge of the rear portion is provided with a toothed structure or a petal-like structure.
- the angle of the tooth structure or the petal-like structure is 0 degrees to 90 degrees (ie, the teeth or petals are 90 degrees perpendicular to the axis of the cylinder, and the teeth or petals are 0 degrees parallel to the axis of the barrel) .
- the wall of the tubular portion of the rear portion is also provided with a through hole. Through these holes, the equilibrium pressure difference can be achieved, the wind speed in the rear part structure can be reduced, and ignition can be promoted.
- the number, shape and size of the holes are set as needed.
- the holes here may be inclined holes and/or straight holes, wherein the inclined hole concentration effect and the split flow effect are superior to those of the straight holes.
- the inlet portion of the bowl-shaped structure of the front portion has a square, circular or angular tooth-like or petal-like structure (similar to the tooth structure of the outlet/spout of the rear portion) Or petal-like structure).
- an additional cylinder is provided on the inside or outside of the rear portion, and an interlayer is formed between the additional cylinder and the cylindrical structure of the rear portion.
- the additional cylinder is disposed such that a hole in the wall of the front portion is covered by the interlayer to have a flow of air in the interlayer, or is disposed such that a hole in the wall of the front portion is not sandwiched by the interlayer
- the cover is inside so that there is no air flow in the interlayer.
- a multi-stage combination of a front portion and a rear portion is provided, the rear portion of the front stage structure and the front portion of the rear stage structure being sequentially nested together.
- the front and rear portions are arranged coaxially.
- the pulverized coal burner according to the present invention especially the internal combustion type burner (the conventional burner is pulverized by the pulverized coal injected into the furnace, and is gradually burned by the convection heat of the furnace radiant heat and the high temperature flue gas, and the internal combustion type
- the burner ignites part of the pulverized coal with an ignition source inside the burner, has started to burn and is then sent to the furnace for combustion, and includes the above-mentioned pulverized coal concentrating device.
- the pulverized coal burner further comprises at least a primary combustion cylinder and an ignition source.
- the pulverized coal concentrating device is disposed between the ignition source and the first stage combustion cylinder, the ignition source extending into the bowl structure of the pulverized coal concentrating device and/or
- the outlet of the pulverized coal concentrating device that is, the outlet of the cylindrical portion of the rear portion, projects into the first stage combustion cylinder.
- the ignition source, the pulverized coal concentrating device and the combustion cylinder are coaxial with each other.
- the ignition source is a plasma generator or a small oil gun or high temperature air.
- the distance between the plasma generator and the bottom of the bowl of the front portion is 10 to 100 mm.
- the pulverized coal particles are forcibly introduced into the concentrating device of the present invention, and the pulverized coal is separated by concentration in the bowl structure, and the pulverized coal having a higher concentration and a lower velocity enters the bowl structure.
- the lower concentration of pulverized coal flows into the lower combustion cylinder, so that the pulverized coal gas flow in the bowl structure is concentrated to a concentration level suitable for ignition of different coal types.
- a small hole is formed in the bowl-shaped structure, and a part of the airflow passes through the small hole in the bowl structure to the outside of the concentrating device, and the dense phase airflow remains in the concentrating device, thereby reducing the wind speed in the concentrating device and reducing
- the increase in flow rate is not conducive to the impact of fire.
- the cylindrical structure behind the concentrating device maintains a moderate extension of the pulverized coal dense phase zone, avoiding the pulverized coal entering the bowl structure from contacting the external cold gas flow prematurely in the early stage of the fire without full combustion, and then igniting the outside after a stable flame is formed.
- Coal powder The hot flame is rapidly expanding at the outlet of the concentrating device and strongly pulverizing with the pulverized coal of the outer cylinder, generating more energy than the ignition source to ignite the next pulverized coal.
- the pulverized coal is separated by concentration in the bowl structure, the higher concentration of the wind powder flows into the bowl structure, and the lower concentration of the air powder flows into the remaining combustion cylinder, so that the pulverized coal gas flow in the bowl structure is concentrated.
- concentration level suitable for ignition To a concentration level suitable for ignition;
- Pulverized coal is in full contact with the ignition source to promote rapid combustion of pulverized coal
- FIG. 1 is a front elevational view showing a first embodiment of a pulverized coal concentrating device of the present invention
- Fig. 2 is a perspective view showing a second embodiment of the pulverized coal concentrating device of the present invention
- Fig. 3 is a view showing the pulverized coal of the present invention.
- 4 is an isometric view of a third embodiment of the pulverized coal concentrating device of the present invention.
- FIG. 5 is a perspective view showing a fourth embodiment of the pulverized coal concentrating device of the present invention
- Figure 6 is a perspective view showing a sixth embodiment of the pulverized coal concentrating device of the present invention
- Figure 7 is a perspective view showing a seventh embodiment of the pulverized coal concentrating device of the present invention
- FIG. 9 is a perspective view showing a ninth embodiment of the pulverized coal concentrating device of the present invention
- FIG. 10 is a perspective view showing a pulverized coal concentrating device of the present invention; a front view of one embodiment of a powder burner;
- Figure 11 is a longitudinal sectional view showing another embodiment of a pulverized coal burner including the pulverized coal concentrating device of the present invention.
- Figures 11 and 12 show a prior art pulverized coal burner.
- Fig. 1 shows a first embodiment of a pulverized coal concentrating device of the present invention, wherein Fig. 1 shows a front view.
- the pulverized coal concentrating device of the present embodiment includes a cylindrical rear portion 101 and a bowl-shaped front portion 102 composed of a curved surface, the front portion 102 having a bowl opening 109 and a bowl bottom opening 103, the bowl bottom opening 103 and the rear portion 101 The entrance is connected.
- the pulverized coal air mixed gas stream also referred to as the air powder flow
- the concentration level after being ignited in the bottom portion 103 of the bowl, continues to be guided into the rear portion 101, and finally the hot flame rapidly expands at the outlet of the concentrating device and strongly blends with the pulverized coal of the next stage, promoting the flame. Coal-coal heat transfer It is easier to form the ignition transfer process of the coal flame.
- the size D1 of the bowl 109 is greater than the size 1) 2 of the bowl bottom 103.
- the axial length of the front portion is less than the axial length of the rear portion.
- the pulverized coal concentrating device may be designed in one piece, that is, the front portion 102 and the rear portion 101 are integrally formed, for example, by casting or injection molding; or the pulverized coal concentrating device may be designed as a split type, Wherein, the front portion 102 and the rear portion 101 are separately formed, and the front portion and the rear portion may be connected together or disposed at a spaced apart distance.
- Fig. 2 is a perspective view showing a second embodiment of the pulverized coal concentrating device of the present invention.
- the present embodiment differs from the first embodiment in that the cylindrical rear portion 101 is composed of four or more flat plates and the bowl-shaped front portion 102 is also composed of four or more flat plates.
- bowl-shaped front portion 102 of the curved surface of Fig. 1 is combined with the cylindrical rear portion 101 of a plurality of planes of Fig. 2, or vice versa, not shown here.
- Fig. 3 is a front elevational view showing a third embodiment of the pulverized coal concentrating device of the present invention.
- This embodiment differs from the first embodiment in that a cylindrical rear portion 101 extends from the bowl opening 109 of the bowl-shaped front portion 102. It is also possible that the inlet of the cylindrical rear portion 101 is joined to the wall between the bowl opening 109 of the bowl-shaped front portion 102 and the bowl bottom opening 103.
- Fig. 4 is a perspective view showing a fourth embodiment of the pulverized coal concentrating device of the present invention.
- the present embodiment differs from the first embodiment in that a tapered barrel 104 is connected at the outlet of the cylindrical rear portion 101.
- the tubular structure of the rear portion may also be designed as a straight cylinder, a diverging cylinder or a tapered cylinder, or a combination of different forms thereof. In the sense of the present invention, such a combination can also be regarded as a "post-part" as a whole.
- the axial length of the overall "rear portion" is preferably greater than the axial length of the bowl-shaped front portion.
- FIG. 5 is a front elevational view showing a fifth embodiment of the pulverized coal concentrating device of the present invention, in which an additional bowl portion is connected to the outlet of the cylindrical rear portion 101.
- the bowl bottom 103 of the piece 104, and the bowl opening 109 of the bowl-shaped front portion 102 and the bowl opening 110 of the additional bowl member 104 face away from each other.
- the size D1 of the bowl opening 109 is greater than the size D2 of the bowl bottom opening 103.
- the size of the bowl opening 111 is greater than the size of the bowl bottom opening 112.
- the combination of such an intermediate straight cylinder with the additional bowl member 104 can also be viewed as a "rear portion" as a whole.
- the axial length of such a "back portion” as a whole is preferably greater than the axial length of the bowl-shaped front portion.
- Fig. 6 is a perspective view showing a sixth embodiment of the pulverized coal concentrating device according to the present invention.
- a plurality of holes 105 are distributed in the peripheral wall of the front portion 102. These holes are preferably provided on the peripheral wall of the front portion 102 at a position close to the bowl bottom 103.
- the number, shape and size of the holes are set according to actual needs.
- the shape of the hole may be a slanted hole or a straight hole. Alternatively or additionally, such a hole may be distributed on the peripheral wall of the rear portion 101.
- Fig. 7 is a perspective view showing a seventh embodiment of the pulverized coal concentrating device of the present invention.
- the present embodiment differs from the first embodiment in that an angular tooth-like structure 106 is provided on the spout of the cylindrical rear portion 101, i.e., the periphery of the outlet.
- the angle of the toothed structure is from 0 to 90 degrees (the toothed structure is 90 degrees perpendicular to the axis of the cylinder and the toothed structure is 0 degrees parallel to the axis of the barrel).
- the spout 106 on the spout of the cylindrical rear portion 101, i.e., the exit periphery, it may also be designed as an angled petal structure.
- Fig. 8 is a front elevational view showing an eighth embodiment of the pulverized coal concentrating device of the present invention.
- the bowl-shaped front portion 102 is connected to the inlet of the cylindrical rear portion 101 through its bowl bottom.
- An additional cylinder 108 is provided on the outside of the rear portion 101, the additional cylinder being attached to the wall of the front portion 102 such that a sandwich 110 is formed between the additional cylinder and the tubular structure of the rear portion.
- the additional cylinder 108 is disposed such that the interlayer 110 formed by the rear partial inner cylinder and the additional cylinder 108 will have the front portion A hole 105 in the wall of 102 is covered inside. It is also possible that the additional cylinder 108 is disposed such that the interlayer 110 formed by the inner cylinder of the rear portion 101 and the additional cylinder 108 does not cover the hole 105 in the wall of the front portion 102.
- Fig. 9 is a perspective view showing a ninth embodiment of the pulverized coal concentrating device of the present invention.
- a two-stage combination structure including a front portion 102, 102, and a rear portion 101, 101 is provided, and a rear portion 101 of the first-stage structure is nested inside the front portion 102 of the second-stage structure.
- the extension can be extended as such.
- FIG 10 is a longitudinal cross-sectional view showing an embodiment of a pulverized coal burner of the present invention comprising the pulverized coal concentrating device of the present invention.
- the pulverized coal burner comprises a two-stage combustion cylinder (a first-stage combustion cylinder 201, a second-stage combustion cylinder 202, that is, a burner outer cylinder), a rear portion 101, a front portion 102, and a hole 105 disposed inside the pulverized coal burner a pulverized coal concentrating device, and a plasma generator 301, the rear portion 101 is fixed to the pulverized coal burner (may also be, the front portion 102 is fixed to the pulverized coal burner, or the front portion 102 and the rear portion 101 are simultaneously Is fixed on the pulverized coal burner).
- the connecting member may be used to connect the pulverized coal concentrating device to the combustion cylinder wall of the pulverized coal burner, thereby fixing the pulverized coal concentrating device inside the combustion cylinder, preferably the axis of the pulverized coal concentrating device and the axis of the burner Coincidence; It is also possible to fix the pulverized coal concentrating device to the plasma generator through the connecting member, or to adopt other fixing methods.
- the pulverized coal concentrating device is disposed between the plasma generator 301 and the first stage combustion cylinder 201.
- the plasma generator 301 extends into the bowl-like structure of the front portion 102 of the pulverized coal concentrating device and the outlet of the pulverized coal concentrating device, that is, the outlet of the cylindrical structure of the rear portion 101, projects into the first stage combustion tube 201 in.
- the distance L3 between the plasma generator and the bottom portion of the front portion of the bowl is 10 to 100 mm.
- a plasma generator a small oil gun or other suitable ignition source can also be used.
- the plasma generator, pulverized coal Preferably, the shrinking device and the combustion cylinder are coaxial with each other.
- the pulverized coal burner of the present invention is divided into several stages. After the concentrated structure is adopted, the heat accumulation ability is enhanced and the combustion flame intensity is increased.
- Fig. 11 is a longitudinal sectional view showing another embodiment of the pulverized coal burner of the present invention comprising the pulverized coal concentrating device of the present invention.
- the other embodiment differs from the embodiment shown in Fig. 10 in that the front portion 102 and the rear portion 101 are spaced apart by a certain distance and are respectively fixed to the pulverized coal burner.
- the size of the bowl bottom 103 of the front portion 102 is preferably smaller than or equal to the size of the inlet of the rear portion 101, whereby the rearward portion of the wind can be complemented to optimize combustion and formation of coking on the wall of the rear portion can be avoided.
- the distance between the partitions can be determined according to factors such as the structural size of each component and the ignition condition.
- the plasma generator 301 is activated to generate a high temperature, high enthalpy plasma flame, and the pulverized coal air stream (also referred to as the air powder flow) enters the front portion of the concentrating device from the bowl 109. 102, a part of the airflow passes through the small hole 105 in the bowl structure to the outside of the concentrating device, and the dense phase airflow remains in the concentrating device, thereby reducing the wind speed in the concentrating device; the small hole 105 can reduce the wind speed and reduce The increase in flow rate is not conducive to the impact of fire.
- the pulverized coal particles are forcibly introduced into the central arc region where the plasma flame temperature is high, and the airflow of the wind powder is concentrated to a concentration level suitable for ignition.
- the pulverized coal was quickly ignited at an early stage.
- the airflow from the bowl bottom 103 enters the rear portion 101 and continues to be guided.
- the hot flame expands rapidly at the outlet of the concentrating device, and is strongly mixed with the pulverized coal of the next stage, generating more energy than the ignition source.
- the pulverized coal entering the first stage sleeve 201 is ignited.
- the second-stage sleeve 202 that is, the pulverized coal in the outer cylinder of the burner, is ignited and finally injected into the furnace for combustion.
- the invention has been described in detail above based on embodiments of the invention, but It is the invention that is not limited thereto.
- the key point of the concentrating device of the present invention is that the front portion of the concentrating device is designed as a bowl-like structure for guiding and concentrating the gas-solid two-phase flow composed of pulverized coal and air, and the latter portion is designed as a cylindrical structure for Maintaining a moderate extension of the dense phase of the wind powder stream, the combination of the two achieves the objectives of the present invention.
- the front portion and the rear portion are relative to the flow direction of the wind powder flow, with the front portion being the front portion along the flow direction and the rear portion being the rear portion.
- the pulverized coal concentrating device of the present invention can fully apply to other related technical fields, such as industrial kilns, without the need for creative labor, as needed.
- the pulverized coal concentrating device of the present invention can also be used to concentrate other fluids, such as other gas-solid two-phase flows.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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RU2011142737/06A RU2490544C2 (ru) | 2009-03-24 | 2010-03-23 | Пылеугольный концентратор и пылеугольная горелка, содержащая этот концентратор |
US13/257,584 US8555795B2 (en) | 2009-03-24 | 2010-03-23 | Pulverized coal concentrator and pulverized coal burner including the concentrator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN 200910119640 CN101846315B (zh) | 2009-03-24 | 2009-03-24 | 煤粉浓缩装置和包含该煤粉浓缩装置的内燃式煤粉燃烧器 |
CN200910119640.3 | 2009-03-24 |
Publications (1)
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WO2010108386A1 true WO2010108386A1 (zh) | 2010-09-30 |
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PCT/CN2010/000354 WO2010108386A1 (zh) | 2009-03-24 | 2010-03-23 | 煤粉浓缩装置和包含该煤粉浓缩装置的煤粉燃烧器 |
Country Status (4)
Country | Link |
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US (1) | US8555795B2 (zh) |
CN (1) | CN101846315B (zh) |
RU (1) | RU2490544C2 (zh) |
WO (1) | WO2010108386A1 (zh) |
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CN102235666B (zh) * | 2010-04-27 | 2014-11-26 | 烟台龙源电力技术股份有限公司 | 一种煤粉燃烧器及包括该煤粉燃烧器的煤粉锅炉 |
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TR201813152T4 (tr) | 2010-12-23 | 2018-09-21 | General Electric Technology Gmbh | Bir kazandan emisyonların indirgenmesine yönelik yöntem. |
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CN102679333A (zh) * | 2012-06-07 | 2012-09-19 | 上海锅炉厂有限公司 | 一种等离子点火煤粉燃烧器 |
CN102679335A (zh) * | 2012-06-07 | 2012-09-19 | 上海锅炉厂有限公司 | 一种微油量点火煤粉燃烧器 |
JP6188658B2 (ja) * | 2014-09-24 | 2017-08-30 | 三菱重工業株式会社 | 燃焼バーナ及びボイラ |
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EP3689122B1 (en) * | 2019-02-04 | 2021-03-03 | Bednar FMT s.r.o. | Distribution head for agricultural device |
CN110131707A (zh) * | 2019-05-14 | 2019-08-16 | 东北大学 | 用于防止高温烟气混流后发生偏流及强化混流的转烟室 |
CN112632793B (zh) * | 2020-12-30 | 2021-11-02 | 中国矿业大学 | 一种煤仓煤料堆积密度离线计算方法 |
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CN113639265A (zh) * | 2021-09-09 | 2021-11-12 | 章丘华明水泥新型建材有限公司 | 一种煤粉喷头结构 |
CN113639265B (zh) * | 2021-09-09 | 2024-06-04 | 章丘华明水泥新型建材有限公司 | 一种煤粉喷头结构 |
Also Published As
Publication number | Publication date |
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CN101846315B (zh) | 2012-07-04 |
RU2011142737A (ru) | 2013-04-27 |
CN101846315A (zh) | 2010-09-29 |
US8555795B2 (en) | 2013-10-15 |
US20120006238A1 (en) | 2012-01-12 |
RU2490544C2 (ru) | 2013-08-20 |
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