CN115261077A - Powder feeder and coal gasification equipment - Google Patents
Powder feeder and coal gasification equipment Download PDFInfo
- Publication number
- CN115261077A CN115261077A CN202110481901.7A CN202110481901A CN115261077A CN 115261077 A CN115261077 A CN 115261077A CN 202110481901 A CN202110481901 A CN 202110481901A CN 115261077 A CN115261077 A CN 115261077A
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- China
- Prior art keywords
- powder
- feeding pipe
- powder feeder
- gears
- gear
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention relates to the field of powder transportation, and discloses a powder feeder and coal gasification equipment, wherein the powder feeder comprises a feeding pipe (1) and paired gears (2) which are arranged in the feeding pipe (1) and are in sealing engagement, the paired gears (2) and the inner wall surface of the feeding pipe (1) form complete circumferential sealing, and the paired gears (2) can rotate to enable tooth grooves of the gears (2) to slide on the inner wall surface of the feeding pipe (1) along the feeding direction so as to accommodate and convey powder through the tooth grooves. Through the technical scheme, the gear can form a sealing structure in the feeding pipe to block airflow from reversely flowing in the feeding pipe, particularly when the gear rotates, positive pressure along the feeding direction is formed at the meshing part, so that the airflow can be further blocked, and the airflow carrying powder is prevented from reversely flowing; in addition, by controlling the rotation angle and the rotation speed of the gear, the quantitative conveying and the flow rate of the powder can be realized.
Description
Technical Field
The invention relates to the field of powder conveying, in particular to a powder feeder and coal gasification equipment.
Background
In the demonstration application of the medium and small coal gasification technology facing coal-based distributed energy, pulverized coal from a pulverized coal bunker needs to be mixed and conveyed to a gasification furnace nozzle by steam and enters a gasification furnace for gasification reaction.
When carrying steam and the mixed contact of fine coal, easily flow into the powder coal storehouse from steam-fine coal blender in, cause the unloading of fine coal unloading on the one hand according to demarcating the flow, on the other hand because of the mixed caking of steam condensation and the interior powder coal of storehouse can't normally the unloading.
The traditional powder feeder with the sealing and air locking functions, such as a star valve, can not meet the requirement of pulverized coal steam conveying demonstration under test conditions, and steam always flows backwards into a pulverized coal bunker. On one hand, powder feeding devices such as a horizontal impeller feeder are complex in structure, difficult to maintain and discontinuous in feeding, and cannot meet the requirements of demonstration tests.
Disclosure of Invention
The invention aims to provide a powder feeder to solve the problem that powder feeding is affected by gas backflow.
In order to achieve the above object, an aspect of the present invention provides a powder feeder, wherein the powder feeder includes a feeding pipe and a pair of gears disposed in the feeding pipe, the pair of gears forming a complete circumferential seal with an inner wall surface of the feeding pipe, the pair of gears being rotatable such that tooth grooves of the gears slide past on the inner wall surface of the feeding pipe in a feeding direction to receive and convey powder through the tooth grooves.
Alternatively, the linear speed direction of the teeth in the engaged state is opposite to said feeding direction.
Optionally, the end face of the gear is in sealing engagement with the inner wall surface of the feeding pipe, and the top faces of at least some of the unmeshed teeth of the gear are in sealing engagement with the inner wall surface of the feeding pipe.
Optionally, the feeding pipe comprises a sealing pipe, and the sealing pipe comprises two flat plate parts attached to the end faces of the gears and an arc-shaped plate attached to the top faces of the gears.
Optionally, the sealing tube includes a connecting plate disposed at an opening defined by the flat plate portion and the arc-shaped plate, and the connecting plate is provided with a through hole for allowing the material to pass through.
Optionally, the feed pipe comprises a feed pipe and a discharge pipe connected to the seal pipe.
Optionally, the gear is a uniform gear.
Optionally, the gear is a spur gear.
Optionally, the powder feeder comprises a driving mechanism in transmission connection with at least one gear, and the driving mechanism can adjust the rotating speed of the gear.
On the other hand, the invention also provides coal gasification equipment, wherein the coal gasification equipment comprises the powder feeder in the scheme.
Through the technical scheme, the gear can form a sealing structure in the feeding pipe to block airflow from reversely flowing in the feeding pipe, particularly when the gear rotates, positive pressure along the feeding direction is formed at the meshing part, so that the airflow can be further blocked, and the airflow carrying powder is prevented from reversely flowing; in addition, the quantitative conveying and flow rate of the powder can be realized by controlling the rotation angle and the rotation speed of the gear.
Drawings
Fig. 1 is a schematic view of an internal structure of a powder feeder according to an embodiment of the present invention.
Description of the reference numerals
1. Feed pipe 2 gear
3. Sealed tube 4 feeding pipe
5. Discharge pipe
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a powder feeder, which comprises a feeding pipe 1 and a pair of gears 2 which are arranged in the feeding pipe 1 and are in sealing engagement, wherein the pair of gears 2 and the inner wall surface of the feeding pipe 1 form complete circumferential sealing, and the pair of gears 2 can rotate to enable tooth grooves of the gears 2 to slide on the inner wall surface of the feeding pipe 1 along a feeding direction to pass through so as to contain and convey powder through the tooth grooves.
As shown in fig. 1, the pair of gears 2 is arranged in the feeding pipe 1, on one hand, the pair of gears 2 forms a seal at the position of meshing, on the other hand, the pair of gears 2 forms a complete circumferential seal with the inner wall surface of the feeding pipe 1, so that a seal between the gears 2 and the feeding pipe 1 can be realized, and gas is prevented from passing through the position of the gears 2 in the feeding pipe 1 in the direction opposite to the feeding direction.
As shown in fig. 1, the feeding direction is from top to bottom, the left gear 2 rotates counterclockwise, the right gear 2 rotates clockwise, the tooth grooves of the gears 2 can accommodate powder from above and carry the powder to slide through the inner wall surface of the feeding pipe 1, and the powder is conveyed and transferred to the lower part of the gears 2, so that feeding of the powder is realized; particularly, when the two gears 2 rotate, positive pressure from top to bottom can be formed at the meshing positions of the two gears 2 to block the gas on the lower side from flowing upwards, so that the powder is prevented from flowing backwards upwards under the action of upward airflow, and feeding of the powder is facilitated.
The sealing in this case means that the powder or gas cannot pass directly between the gear 2 and the feed pipe 1, but needs to be transferred in the tooth space from one side of the gear 2 to the other side in the feeding direction following the rotation of the gear 2.
In fig. 1, only one set of paired gears 2 is provided in the feeding pipe 1, and in other embodiments, a plurality of sets of paired gears 2 may be provided to further improve the blocking effect of the gears 2 on the reverse air flow.
The gear can form a sealing structure in the feeding pipe to block airflow from reversely flowing in the feeding pipe, and particularly when the gear rotates, positive pressure along the feeding direction is formed at the meshing part to further block the airflow, so that the airflow is prevented from carrying powder to reversely flow, the powder is prevented from being agglomerated by steam, and the powder can be smoothly fed; in addition, by controlling the rotation angle and the rotation speed of the gear, the quantitative conveying and the flow rate of the powder can be realized.
Wherein the linear velocity direction of the teeth in the meshing state is opposite to the feeding direction. Referring to fig. 1, the linear velocity direction of the portion where the two gears 2 mesh with each other is upward, opposite to the feeding direction, which allows the tooth grooves to receive and carry the powder moving from one side of the gear 2 to the other side in the feeding direction, achieving the transfer of the powder.
Specifically, the end face of the gear 2 is in sealing contact with the inner wall surface of the feeding pipe 1, and the tooth crest faces of at least some of the unmeshed teeth of the gear 2 are in sealing contact with the inner wall surface of the feeding pipe 1. Both end faces of the toothed wheels 2 in their axial direction are in sealing abutment with the inner wall face of the feeder tube 1, and the tooth tips of at least a part of the non-meshing teeth are in sealing abutment with the inner wall face of the feeder tube 1, so that a complete circumferential seal is formed, and this circumferential seal remains effective when the two toothed wheels 2 are rotated.
The feeding pipe 1 comprises a sealing pipe 3, and the sealing pipe 3 comprises two flat plate parts attached to the end faces of the gears 2 and an arc-shaped plate attached to the tooth top faces of the gears 2. The sealing tube 3 and the paired gears 2 form complete circumferential sealing, the flat plate part and the arc-shaped plate are enclosed to form the sealing tube 3, the flat plate part is in sealing fit with four end faces of the two gears, the arc-shaped plate is in sealing fit with tooth top faces of the gears 2 which are not meshed, and under the condition that the gears 2 rotate, the sealing tube 3 and the paired gears 2 are effectively sealed. As shown in fig. 1, the radian of the arc-shaped plate is half of a circumference, and the addendum surface of half of the teeth of each gear 2 is kept in sealing fit with the arc-shaped plate; certainly, the radian of arc also can be bigger or littleer, and on the one hand need guarantee that at least one tooth and arc seal the laminating when gear 2 rotates, and on the other hand needs to guarantee that there is the tooth's socket that does not mesh and can receive the powder.
In addition, the sealing tube 3 comprises a connecting plate arranged at an opening surrounded by the flat plate part and the arc-shaped plate, and the connecting plate is provided with a through hole for allowing materials to pass through. The two flat plate parts can be parallel to each other, the opening enclosed by the arc-shaped plates can be square, round through holes can be formed in the connecting plate to allow materials to pass through to enter the sealing pipe 3 or flow out of the sealing pipe 3, and the connecting plate can be connected with other parts at the through holes to convey the materials.
In addition, the feed pipe 1 comprises a feed pipe 4 and a discharge pipe 5 connected to the sealing pipe 3. The inlet pipe 4 and the outlet pipe 5 can be connected to the through hole of the connecting plate respectively, the inlet pipe 4 and the outlet pipe 5 can be round pipes, and are convenient to connect with other equipment, for example, the inlet pipe 4 can be connected to powder storage equipment, and the outlet pipe 5 can be connected to other pipe fittings or receiving equipment.
Alternatively, the gear 2 is a uniform gear. The size of each tooth of the gear 2 is the same, the tooth space is the same, namely the size of the tooth socket is the same, when the tooth top surface of each two adjacent teeth is in sealing fit with the sealing tube 3, the volume of the space enclosed by the tooth socket between the two teeth and the sealing tube 3 is the same, so that when the gear 2 rotates at a constant speed, the flow rate for conveying and transferring the powder is uniform, and the powder in the tooth sockets with specific quantity can pass through by adjusting the rotation angle of the gear 2, thereby realizing quantitative feeding. In other embodiments, the teeth of the gear 2 may be of different sizes, and the gullets may be of different sizes.
Wherein the gear 2 is a spur gear. As the gear 2 rotates, the tooth crest of each tooth can quickly establish a seal with the sealing tube 3 and can quickly break away from the seal to transfer powder. In other embodiments, the gear 2 may be a helical gear.
Optionally, the powder feeder comprises a driving mechanism in transmission connection with at least one gear 2, and the driving mechanism can adjust the rotation speed of the gear 2. The driving mechanism can penetrate through the feeding pipe 1 to be in transmission connection with the gear 2 so as to drive the gear 2 to rotate, and can adjust the rotating speed of the gear 2 by adjusting the torque output, so that the whole powder flow rate is adjusted.
Referring to fig. 1, an internal structure diagram of a powder feeder is shown, including two gears 2 and a feeding pipe 1, and a person skilled in the art can derive the structure of the powder feeder based on the above description, wherein the inner diameter of the feeding pipe 4 can be 200mm, the inner diameter of the discharging pipe 5 can be 200mm, the distance between the axes of the two gears 2 is 200mm, the diameter of the tip circle of the gear 2 is 200mm, and the diameter of the root circle is 175mm.
In addition, the invention also provides coal gasification equipment, wherein the coal gasification equipment comprises the powder feeder in the scheme. The powder feeder can provide coal powder for the coal gasifier, and the coal gasifier can convert the coal powder and other materials into gas products.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple variants are possible, comprising the combination of the individual specific technical features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The powder feeder is characterized by comprising a feeding pipe (1) and a pair of gears (2) which are arranged in the feeding pipe (1) and are in sealing engagement, wherein the pair of gears (2) and the inner wall surface of the feeding pipe (1) form complete circumferential sealing, and the pair of gears (2) can rotate to enable tooth grooves of the gears (2) to slide on the inner wall surface of the feeding pipe (1) along a feeding direction to pass through so as to contain and convey powder through the tooth grooves.
2. Powder feeder according to claim 1, characterised in that the linear speed direction of the teeth in engagement is opposite to the feeding direction.
3. Powder feeder according to claim 1, characterised in that the end surface of the gear wheel (2) is in sealing contact with the inner wall surface of the feeding pipe (1), and that the tooth tip surfaces of at least some of the non-meshing teeth of the gear wheel (2) are in sealing contact with the inner wall surface of the feeding pipe (1).
4. Powder feeder according to claim 1, characterised in that the feeding tube (1) comprises a sealing tube (3), which sealing tube (3) comprises two flat plate parts that abut against the end faces of the gear wheel (2) and an arc-shaped plate that abuts against the tooth tip faces of the gear wheel (2).
5. Powder feeder according to claim 4, characterised in that the sealing tube (3) comprises a connection plate arranged at the opening enclosed by the flat plate part and the arc plate, which connection plate is provided with through holes allowing the material to pass through.
6. Powder feeder according to claim 4, characterised in that the feeder tube (1) comprises a feeder tube (4) and a discharge tube (5) connected to the sealing tube (3).
7. Powder feeder according to claim 1, characterised in that the gear wheel (2) is a uniform gear wheel.
8. Powder feeder according to claim 1, characterised in that the gear wheel (2) is a spur gear.
9. Powder feeder according to claim 1, characterised in that the powder feeder comprises a drive mechanism in drive connection with at least one of the gear wheels (2), which drive mechanism is capable of adjusting the rotational speed of the gear wheel (2).
10. A coal gasification plant, characterized in that it comprises a powder feeder according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481901.7A CN115261077A (en) | 2021-04-30 | 2021-04-30 | Powder feeder and coal gasification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481901.7A CN115261077A (en) | 2021-04-30 | 2021-04-30 | Powder feeder and coal gasification equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115261077A true CN115261077A (en) | 2022-11-01 |
Family
ID=83744759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110481901.7A Withdrawn CN115261077A (en) | 2021-04-30 | 2021-04-30 | Powder feeder and coal gasification equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115261077A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118164263A (en) * | 2024-04-25 | 2024-06-11 | 常州市科健电力设备有限公司 | Pneumatic conveying pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1133527A (en) * | 1997-07-25 | 1999-02-09 | Marcom:Kk | Apparatus for activating and supplying microorganism powder |
| JP2008013319A (en) * | 2006-07-06 | 2008-01-24 | Nippon Alum Co Ltd | Powder microfeeder |
| CN102633123A (en) * | 2012-05-03 | 2012-08-15 | 东南大学 | Gear pump for conveying dry powder in transforming way |
| CN202558273U (en) * | 2012-05-03 | 2012-11-28 | 东南大学 | Gear type variable pressure dry powder pump |
| CN104627683A (en) * | 2015-02-02 | 2015-05-20 | 东南大学 | Dry powder squeezing and sealing pressure-variable conveying device |
| CN106398770A (en) * | 2016-11-11 | 2017-02-15 | 航天长征化学工程股份有限公司 | Crawler-type fine coal pressurizing and conveying device |
| CN106433802A (en) * | 2016-11-11 | 2017-02-22 | 航天长征化学工程股份有限公司 | Gear type pulverized coal pressurized conveying device |
| JP2019137487A (en) * | 2018-02-08 | 2019-08-22 | アイシン産業株式会社 | Hopper feeder |
-
2021
- 2021-04-30 CN CN202110481901.7A patent/CN115261077A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1133527A (en) * | 1997-07-25 | 1999-02-09 | Marcom:Kk | Apparatus for activating and supplying microorganism powder |
| JP2008013319A (en) * | 2006-07-06 | 2008-01-24 | Nippon Alum Co Ltd | Powder microfeeder |
| CN102633123A (en) * | 2012-05-03 | 2012-08-15 | 东南大学 | Gear pump for conveying dry powder in transforming way |
| CN202558273U (en) * | 2012-05-03 | 2012-11-28 | 东南大学 | Gear type variable pressure dry powder pump |
| CN104627683A (en) * | 2015-02-02 | 2015-05-20 | 东南大学 | Dry powder squeezing and sealing pressure-variable conveying device |
| CN106398770A (en) * | 2016-11-11 | 2017-02-15 | 航天长征化学工程股份有限公司 | Crawler-type fine coal pressurizing and conveying device |
| CN106433802A (en) * | 2016-11-11 | 2017-02-22 | 航天长征化学工程股份有限公司 | Gear type pulverized coal pressurized conveying device |
| JP2019137487A (en) * | 2018-02-08 | 2019-08-22 | アイシン産業株式会社 | Hopper feeder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118164263A (en) * | 2024-04-25 | 2024-06-11 | 常州市科健电力设备有限公司 | Pneumatic conveying pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221101 |