CN2103739U - Self-balance two-stage powder supply device - Google Patents
Self-balance two-stage powder supply device Download PDFInfo
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- CN2103739U CN2103739U CN 91200545 CN91200545U CN2103739U CN 2103739 U CN2103739 U CN 2103739U CN 91200545 CN91200545 CN 91200545 CN 91200545 U CN91200545 U CN 91200545U CN 2103739 U CN2103739 U CN 2103739U
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Abstract
The utility model discloses the self-balance two-stage powder supply device of a powdered coal combustion system, which is mainly composed of a powder storage barn, a vibration powder bucket, a bottom valve, a secondary powder bucket, an agitator, and a pulverized powder feeder; the self-balance two-stage powder supply device can be used to overcome the powder bursting phenomenon generated in a storage barn, and the powder supplying speed can be regulated automatically according to the powder level self-balancing control principle. On the condition that automatic control elements and devices are not needed, the device can ensure that the powder supplying is not interrupted and the powder supplying is uniform; as the device is simple, the operation is simple and reliable, and the operation can be carried out without human care.
Description
The utility model relates to is coal powder supply device in powder feedway, the especially coal combustion systems.
Existing coal powder supply device often adopts the one-level powder feeder unit, i.e. powder-storage bin outlet directly links machine supplying powder.(see calculating and 57 years version hydraulic and electric engineering P17 of publishing house of the design standard Soviet Union of coal dust manufacturing equipment, boiler combustion equipment, the P232 of Xi'an Communications University) velocity variations by machine supplying powder provides the different coal dusts of measuring from powder-storage bin, reaches the purpose that satisfies the boiler combustion needs and supply with coal dust.At present, the coal dust of warehouse system is supplied with and is just adopted this device in the middle of on power plant or the Industrial Boiler.Because the viscosity property of coal dust is often given " canopy powder " phenomenon that produces coal dust on the coal dust flow channel of powder at powder-storage bin easily to machine supplying powder.Promptly above the machine supplying powder import, produce in " hole ", cause the inhomogeneous even confession powder interruption of confession powder.Not only have influence on the stability of boiler combustion, in addition the fire extinguishing of disconnected powder, the economy of boiler operatiopn, reliability are reduced, also the safety to boiler threatens.Because powder-storage bin powder position is changeable, cause the powder-feeding amount of machine supplying powder under same rotating speed inhomogeneous simultaneously.
It is simple that the purpose of this utility model provides equipment, do not need Automatic Control Component and equipment, reliable and continuous powder that cost is low and the auto-balanring two-stage feeding device that evenly supplies powder.
For achieving the above object, the utility model has been taked following measure: the powder-storage bin of band bullet connects down vibration powder bucket, under the vibration powder bucket bottom valve is arranged, and bottom valve is as the switch of powder-storage bin and support the downward powder post weight of powder-storage bin.When bottom valve was opened, coal dust flowed into secondary powder bucket.Secondary powder bucket utilizes the coal powder natural stocking angle to form fixedly powder position, and when the machine supplying powder under the secondary powder bucket was worked, powder-storage bin was by powder under the vibration powder bucket, and powder speed can be from the powder-supplying speed of motion tracking machine supplying powder down for it.In secondary powder bucket exit agitator is housed, prevents that the coal dust of machine supplying powder inlet top from producing " canopy powder " phenomenon.
The result that above-mentioned measure is implemented is: overcome powder-storage bin and given coal dust " canopy powder " phenomenon that produces on the coal dust flow channel of powder to machine supplying powder, realized continuous powder and the purpose of evenly giving powder.Because equipment is simple, therefore easy and simple to handle, reliable, and can nobody look after operation.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is a self-balancing two-stage coal supply powder device sketch.
Fig. 2 is a powder position self-balancing control block diagram.
Fig. 3 is a powder position self-balancing fundamental diagram.
Below each accompanying drawing is described respectively.
Auto-balanring two-stage feeding device shown in Figure 1, its composition is: the bottom of the powder-storage bin (1) of band bullet hangs by soft connector (2) with vibration powder bucket (3) upper opening and is connected, be equipped with by cutting down (4) in the end of the pyramid bodily form of secondary powder bucket (5) supporting at the lower part outlet place of vibration powder bucket (3), the lower part outlet of vibration powder bucket extends in the secondary powder bucket (5), secondary powder bucket (5) shrinks the funnel that certain altitude is arranged for expansion bottom, top, and its underpart is connected with machine supplying powder (7) flange.The two is parallel for the center line of secondary powder bucket (5) outlet and the center line of powder-storage bin (1), machine supplying powder (7) directly is connected with the conduit that leads to burner by lower interface, is that the agitator (6) that rotates synchronously with machine supplying powder (7) is equipped with at the outlet position of secondary powder bucket (5) in machine supplying powder (7) import top.
The working condition of this device is: vibration powder bucket (3) mat symmetry is contained in two inertia vibrators (9) on this powder bucket (3) shell as vibration source, make the coal dust in the vibration powder bucket (3) produce irregular motion, flow out in the adjustable clearance of coal dust self-excited oscillation powder bucket (3) and bottom valve (4).Bottom valve is cone-shaped, and coal dust flows into secondary powder bucket by the circumference of bucket.This powder delivery mode has overcome powder-storage bin " canopy powder " phenomenon.Simultaneously, because bottom valve born the downward coal dust post weight of powder-storage bin, it has played buffer action, makes the work of secondary powder bucket not be subjected to the influence of powder-storage bin operating mode.Adjustable gaps between vibration powder bucket (3) and the bottom valve is to zero, and promptly coal dust dams.Powder-storage bin center line and secondary powder bucket center line of discharge have a centre-to-centre spacing, are convenient to do down the powder operating mode and observe.Machine supplying powder (7) is the device that coal dust directly is provided to boiler or industrial furnace, and it changes powder-feeding amount according to the load needs with the form that changes rotating speed.Because the powder post height (powder position) of machine supplying powder top can have influence on the size for the powder amount, so machine supplying powder requires its top to have stable powder position to guarantee that it is evenly for powder.The stable of powder position reaches by powder position self-balancing.Fig. 2 is a powder position self-balancing block diagram.As seen from Figure 2, realize powder position self-balancing closed-loop control, except that complete forward path is arranged, desirable feedback network (8) should be arranged also, one of original place of the present utility model has utilized the natural characteristic of coal dust stocking angle to constitute desirable feedback network.Figure 3 shows that powder position self-balancing fundamental diagram, as can be seen from Figure 3, the coal dust of coal store (1) flows into secondary powder bucket (5) by vibration powder bucket (3), is risen in the powder position of secondary powder bucket, and coal dust stocking angle α is from large to small to coal powder natural stocking angle α
1The time, coal dust just stops to flow, and has formed the stable powder position under the inactive state.When machine supplying powder (7) rotated to powder outlet quantity, the powder position descended, α
1It is big that the angle becomes, and causes the coal dust of vibration powder bucket to begin powder down again.The following powder of vibration powder bucket (3) can provide coal dust from the motion tracking machine supplying powder, makes coal dust at new stocking angle α
2Reached dynamic balance, the powder position when also making this has kept settling position.The dirty speed of coal dust self-excited oscillation powder bucket from motion tracking give the speed of powder delivery, not only obtained adjusting function thus, stable simultaneously powder position is for evenly providing necessary condition for powder.For avoiding machine supplying powder inlet top to produce " canopy powder ", installing is very important with the agitator (6) that machine supplying powder rotates synchronously.
Embodiment
Adopted auto-balanring two-stage feeding device on the combustion system of the coal-fired powder Industrial Boiler of a 2t/h, its device performance parameters is as follows: powder-storage bin (1): diameter phi 2400 highly is 11m, and the lower cone cone angle is 45 °, volume 35m
3, about 16 tons of coal storage powder amount.
Vibration powder bucket (3): inlet diameter φ 550mm, outlet diameter φ 250mm volume 0.11m
3, two of band vibrators, every motor power (output) is 0.75KW; Powder-storage bin adopts rubber as flexible connection spare (2) with vibration powder bucket; (4) band conical inner body is cut down at the end; Secondary powder bucket (5) volume is 0.25m
3, highly be 800mm; Machine supplying powder (7): motor power (output) is 1.2KW, 4～40 rev/mins of rotating speeds, to the coal dust amount be 50～500 kilograms/time.
Operation facts have proved, is in operation disconnected powder phenomenon does not take place, and powder-feeding homogeneity reaches desired level, and it is simple to operate to change the powder amount, can nobody look after operation.
Claims (3)
1, a kind of coal supply powder device is by powder-storage bin, vibrating bunker, bottom valve, the secondary hopper, parts such as agitator and machine supplying powder are formed, the bottom that it is characterized in that the powder-storage bin (1) with bullet is connected by soft connector (2) suspension with the upper opening of vibration powder bucket (3), the bottom valve (4) by the cone-shaped of secondary powder bucket (5) supporting is equipped with at the lower part outlet place of vibration powder bucket (3), the lower part outlet of vibration powder bucket (3) extends in the secondary powder bucket (5), the funnel that secondary powder bucket (5) shrinks for expansion bottom, top, its underpart is connected with machine supplying powder (7) flange, the center line of secondary powder bucket (5) outlet and the center line equality of powder-storage bin (1), machine supplying powder (7) directly is connected with the conduit that leads to burner by lower interface, is that the agitator (6) that rotates synchronously with machine supplying powder (7) is equipped with at the outlet position of secondary powder bucket (5) in machine supplying powder (7) import top.
2, according to the described powder feeder unit of claim 1, it is characterized in that flowing out in the adjustable clearance of coal dust self-excited oscillation hopper (3) and bottom valve (4), overcome powder-storage bin " canopy powder " phenomenon.
3,, it is characterized in that the powder amount that machine supplying powder (7) when work vibration powder bucket (3) powder dropping amount can provide from the motion tracking machine supplying powder, and above the machine supplying powder import, keep stablizing the powder position according to the described powder feeder unit of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200545 CN2103739U (en) | 1991-01-16 | 1991-01-16 | Self-balance two-stage powder supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91200545 CN2103739U (en) | 1991-01-16 | 1991-01-16 | Self-balance two-stage powder supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2103739U true CN2103739U (en) | 1992-05-06 |
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ID=4911476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91200545 Pending CN2103739U (en) | 1991-01-16 | 1991-01-16 | Self-balance two-stage powder supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2103739U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968229A (en) * | 2010-04-23 | 2011-02-09 | 是春国 | Powder sprayer |
| CN102207354A (en) * | 2011-06-22 | 2011-10-05 | 武汉北湖胜达制铁有限公司 | Novel energy-saving combustion device based on tunnel kiln reducing process |
-
1991
- 1991-01-16 CN CN 91200545 patent/CN2103739U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968229A (en) * | 2010-04-23 | 2011-02-09 | 是春国 | Powder sprayer |
| CN102207354A (en) * | 2011-06-22 | 2011-10-05 | 武汉北湖胜达制铁有限公司 | Novel energy-saving combustion device based on tunnel kiln reducing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |