CN202935946U - Efficient positive-pressure pneumatic conveying system of pebble coal - Google Patents
Efficient positive-pressure pneumatic conveying system of pebble coal Download PDFInfo
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- CN202935946U CN202935946U CN 201220634481 CN201220634481U CN202935946U CN 202935946 U CN202935946 U CN 202935946U CN 201220634481 CN201220634481 CN 201220634481 CN 201220634481 U CN201220634481 U CN 201220634481U CN 202935946 U CN202935946 U CN 202935946U
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Abstract
The utility model relates to an efficient positive-pressure pneumatic conveying system of pebble coal, wherein the efficient positive-pressure pneumatic conveying system of the pebble coal is used for discharging of the pebble coal of a medium speed coal mill in a heat-energy plant. The efficient positive-pressure pneumatic conveying system of the pebble coal comprises a pebble coal bunker, wherein the upper end of the pebble coal bunker is connected with a pebble coal outlet of the medium speed coal mill. An outlet formed at the lower end of the pebble coal bunker is connected with a feeding device, wherein an inlet formed at the front end of the feeding device is connected with a compressed air pipe, an outlet formed at the rear end of the feeding device is connected with a pebble coal scuttle through a conveying pipe, and a gas outlet of the pebble coal scuttle passes by a dirt catcher and then exhausts air. The efficient positive-pressure pneumatic conveying system of the pebble coal overcomes the defects of an original negative-pressure pneumatic conveying system. The efficient positive-pressure pneumatic conveying system of pebble coal is low in energy consumption, little in noise, high in reliability, and good in conveying capacity. Utilization of loose air ducts enhances the conveying capacity of the system air ducts and guarantees that failure of the system can be resolved. A pebble coal bunker vibrating screen can effectively eliminate materials which are not appropriate for pneumatic conveyance and guarantees that the system is not blocked.
Description
Technical field
The utility model relates to a kind of efficient pebble coal positive pressure pneumatic delivery system for the medium speed mill in heat-engine plant stone coal discharge.
Background technology
Medium-speed pulverizer is due to small investment, and good economy performance is widely applied in the station boiler unit.Medium-speed pulverizer can produce pebble coal in operational process.Pebble coal is mainly derived from that density in raw coal is large, the spoil of difficult mill, iron pyrite etc., falls when coal mill move below vane, sends into the stone coal bunker by scraper plate, from the stone coal discharge mouth discharge of bottom.If stone coal discharge is untimely, bulk deposition in coal mill easily causes the coal mill fault to stop transport.
Pebble coal mainly is comprised of foreign material such as gangue, broken coal piece, stone and coal dusts, and granularity generally is not more than 50mm, and bulk density is 1.0 ~ 1.5 t/m3, and temperature is generally 150 ℃ of left and right.Density is large, particle is large, hardness is high, temperature is high owing to having for pebble coal, contain the characteristic such as dust, makes pebble coal have certain difficulty processing and carry.Common stone coal discharge has manual emission, hydraulic discharge, three kinds of patterns of mechanical transportation.At present, because power plant's coal is changeable, the general variation of raw coal ature of coal, in raw coal, the foreign material such as stone, spoil, ore increase than before, the stone coal discharge amount increases greatly, have a strong impact on the safe operation of thermal power plant, conventional stone coal discharge mode all is difficult to solve the problem that present pebble coal amount increases greatly.
Recent domestic minority power plant processes pebble coal and transform negative-pressure pneumatic transmission system as.Air-flow with motion is the medium transport material, is the industrial transportation resources of using already, is called strength and carries.Air-transport system adopts the operation pressure of medium to be divided into that malleation is carried according to it and two types of negative pressure transportation, negative-pressure pneumatic is carried to compare with conventional stone coal discharge mode has obvious advantage, and result of practical application also shows the requirement that substantially can satisfy power plant's stone coal discharge.
But negative-pressure pneumatic transmission system also has obvious shortcoming, and subject matter is as follows:
1, negative-pressure pneumatic transmission system needs high-power roots blower as propulsion source, and energy consumption is high;
2, system's end air-flow velocity is higher, is very easy to cause pipeline and equipment attrition, causes system to work;
3, majority still adopts screw feeder as pebble coal charging instrument, can't carry for large particle diameter pebble coal, and screw feeder is very easy to et out of order as tumbler when carrying pebble coal, also easily wearing and tearing;
4, negative pressure system effective power pressure reduction mostly is a barometric pressure most, has limited the traffic capacity of air-transport system;
5, the roots blower noise is very large, becomes the new sound pollution source of power plant.
Traditional positive pneumatic conveying system generally adopts storehouse pump or screw feeder as feeding device, and due to the specific physical of pebble coal, storehouse pump and screw feeder all are difficult to realize the normal feed of pebble coal.
Summary of the invention
Technical problem to be solved in the utility model is that the efficient pebble coal positive pressure pneumatic delivery system that a kind of energy consumption is low, noise is little, carry good stability is provided.
Efficient pebble coal positive pressure pneumatic delivery system of the present utility model includes the stone coal bunker that a upper end is connected with the outlet of medium-speed pulverizer pebble coal, the outlet of stone coal bunker lower end connects a feed arrangement, described feed arrangement front end import connects compressed air piping, the back outlet of feed arrangement is connected to the stone coal bunker through delivery duct, and the gas vent of stone coal bunker is through the dust exhaustor air draft.
Be connected with one period communicating pipe between the upper space of described compressed air piping and stone coal bunker, make in the stone coal bunker to keep malleation.
Be provided with a vibration screen between described stone coal bunker upper end entrance and lower end outlet, be unsuitable for separation the bulk pebble coal that strength is carried.
The different transportation sections of described delivery duct are provided with several valvular loose airduct are installed, and are used for passing into when needed loose air-flow, prevent the material deposition.
But be provided with the access door of opening and closing on the bulkhead of described stone coal bunker bottom, the maintenance that is used for clearing up.
Described feed arrangement includes a feeding warehouse, and feeding warehouse leading portion top arranges inlet point, and feeding warehouse leading portion middle part is provided with the separator of battery plates of a level; The feeding warehouse front end is provided with two ventilation inlets that lay respectively at the separator of battery plates above and below, the ventilation inlet of top is connected with compressed air piping through one section blanking airduct, the ventilation inlet of below carries airduct to be connected with compressed air piping through one section, is provided with flow control device on blanking airduct and conveying airduct; The feeding warehouse rear end is provided with the discharging opening that is connected with the pebble coal delivery duct.Be provided with a receiving hopper on described inlet point, be connected with the pulse loose tube that can pass into air pulse on the sidewall of receiving hopper.Described feeding warehouse back segment is provided with the springboard of the level that is positioned at the separator of battery plates back lower place.
Efficient pebble coal positive pressure pneumatic delivery system of the present utility model has solved the deficiency of original negative-pressure pneumatic transmission system, and the whole system energy consumption is low, and noise is little, and reliability is high, and traffic capacity is strong; Adopt the loose airduct can the strengthening system traffic capacity, there be solution in the system that guarantees simultaneously when et out of order; Stone coal bunker vibration screen can effectively be removed and be not suitable for the material that strength is carried, and the assurance system is jam not.Its feed arrangement does not adopt any tumbler, and reliability is high; Can control the pebble coal blanking velocity by compressed air require in adjusting blanking airduct, carry the airduct compressed air require can control the pumped (conveying) medium amount by adjusting, thereby make system can fully adapt to the stone coal discharge demand of various speed, be disposed at simultaneously economic pumped (conveying) medium amount, thereby make the energy consumption of whole system drop to minimum; Separator of battery plates can be regulated to adapt to large particle diameter pebble coal and carry, and springboard can make pebble coal that rate of onset is arranged and be in air-flow velocity highest region territory, is conducive to the smooth and easy conveying of pebble coal.
Description of drawings
Fig. 1 is the Facad structure schematic diagram of the utility model embodiment;
Fig. 2 is the plan structure schematic diagram of Fig. 1;
Fig. 3 is the local structure for amplifying schematic diagram of the stone coal bunker part of the utility model embodiment;
Fig. 4 is feed arrangement structural representation of the present utility model.
The specific embodiment
As Figure 1-3, this efficient pebble coal positive pressure pneumatic delivery system includes the stone coal bunker 1 that a upper end is connected with the outlet of medium-speed pulverizer pebble coal, the outlet of stone coal bunker lower end connects a feed arrangement 2, described feed arrangement 2 front end imports connect compressed air piping 3, the back outlet of feed arrangement 2 is connected to stone coal bunker 5 through delivery duct 4, and the gas vent of stone coal bunker is through dust exhaustor 6 air drafts.Be connected with one period communicating pipe 7 between the upper space of compressed air piping 3 and stone coal bunker 1, make in the stone coal bunker to keep malleation.Be provided with a vibration screen 11 between the outlet of end entrance and lower end on stone coal bunker 1, be unsuitable for separation the bulk pebble coal that strength is carried.The different transportation sections of delivery duct 4 are provided with several valvular loose airduct 41 are installed, and are used for passing into when needed loose air-flow, prevent the material deposition.But be provided with the access door 12 of opening and closing on stone coal bunker 1 bottom bulkhead, the maintenance that is used for clearing up.
As shown in Figure 4, feed arrangement 2 includes a feeding warehouse 21, and feeding warehouse leading portion top arranges inlet point 22, and feeding warehouse leading portion middle part is provided with the separator of battery plates 23 of a level; The feeding warehouse front end is provided with two ventilation inlets that lay respectively at the separator of battery plates above and below, the ventilation inlet of top is connected with compressed air piping P through one section blanking airduct 24, the ventilation inlet of below carries airduct 25 to be connected with compressed air piping P through one section, is provided with flow control device on blanking airduct and conveying airduct; The feeding warehouse rear end is provided with the discharging opening 26 that is connected with the pebble coal delivery duct.Be provided with a receiving hopper 27 on inlet point 22, be connected with the pulse loose tube 28 that can pass into air pulse on the sidewall of receiving hopper.The feeding warehouse back segment is provided with the springboard 29 of the level that is positioned at separator of battery plates 23 back lower places.
Claims (7)
1. efficient pebble coal positive pressure pneumatic delivery system, it is characterized in that: it includes the stone coal bunker (1) that a upper end is connected with the outlet of medium-speed pulverizer pebble coal, the outlet of stone coal bunker lower end connects a feed arrangement (2), described feed arrangement (2) front end import connects compressed air piping (3), the back outlet of feed arrangement (2) is connected to stone coal bunker (5) through delivery duct (4), and the gas vent of stone coal bunker is through dust exhaustor (6) air draft;
Be connected with one period communicating pipe (7) between the upper space of compressed air piping (3) and stone coal bunker (1), make in the stone coal bunker to keep malleation.
2. efficient pebble coal positive pressure pneumatic delivery system according to claim 1, is characterized in that: be provided with a vibration screen (11) between the upper end entrance of stone coal bunker (1) and lower end outlet.
3. efficient pebble coal positive pressure pneumatic delivery system according to claim 1 is characterized in that: the different transportation sections of delivery duct (4) are provided with several valvular loose airduct (41) are installed.
4. efficient pebble coal positive pressure pneumatic delivery system according to claim 1 is characterized in that: stone coal bunker (1) but be provided with the access door (12) of opening and closing on the bulkhead of bottom.
5. efficient pebble coal positive pressure pneumatic delivery system according to claim 1, it is characterized in that: described feed arrangement (2) includes a feeding warehouse (21), feeding warehouse leading portion top arranges inlet point (22), is provided with the separator of battery plates (23) of a level in the middle part of the feeding warehouse leading portion; The feeding warehouse front end is provided with two ventilation inlets that lay respectively at the separator of battery plates above and below, the ventilation inlet of top is connected with compressed air piping (P) through one section blanking airduct (24), the ventilation inlet of below carries airduct (25) to be connected with compressed air piping (P) through one section, is provided with flow control device on blanking airduct and conveying airduct; The feeding warehouse rear end is provided with the discharging opening (26) that is connected with the pebble coal delivery duct.
6. efficient pebble coal positive pressure pneumatic delivery system according to claim 5, is characterized in that: be provided with a receiving hopper (27) on inlet point (22), be connected with the pulse loose tube (28) that can pass into air pulse on the sidewall of receiving hopper.
7. efficient pebble coal positive pressure pneumatic delivery system according to claim 5 is characterized in that: the feeding warehouse back segment is provided with the springboard (29) of the level that is positioned at separator of battery plates (23) back lower place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634481 CN202935946U (en) | 2012-11-27 | 2012-11-27 | Efficient positive-pressure pneumatic conveying system of pebble coal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220634481 CN202935946U (en) | 2012-11-27 | 2012-11-27 | Efficient positive-pressure pneumatic conveying system of pebble coal |
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| CN202935946U true CN202935946U (en) | 2013-05-15 |
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| CN 201220634481 Expired - Fee Related CN202935946U (en) | 2012-11-27 | 2012-11-27 | Efficient positive-pressure pneumatic conveying system of pebble coal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923485A (en) * | 2012-11-27 | 2013-02-13 | 西安热工研究院有限公司 | Efficient positive-pressure pneumatic conveying system of pebble coal |
| CN103274217A (en) * | 2013-06-20 | 2013-09-04 | 中天钢铁集团有限公司 | Novel coal conveying bunker type pump with blockage-preventing outlet |
| CN104404272A (en) * | 2014-11-11 | 2015-03-11 | 宁夏嘉翔自控技术有限公司 | High-voltage pulse device of charging mechanism of metal magnesium smelting high pressure slag-removing and charging machine |
-
2012
- 2012-11-27 CN CN 201220634481 patent/CN202935946U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923485A (en) * | 2012-11-27 | 2013-02-13 | 西安热工研究院有限公司 | Efficient positive-pressure pneumatic conveying system of pebble coal |
| CN103274217A (en) * | 2013-06-20 | 2013-09-04 | 中天钢铁集团有限公司 | Novel coal conveying bunker type pump with blockage-preventing outlet |
| CN103274217B (en) * | 2013-06-20 | 2016-03-02 | 中天钢铁集团有限公司 | The novel defeated coal cone pump of outlet anti-clogging |
| CN104404272A (en) * | 2014-11-11 | 2015-03-11 | 宁夏嘉翔自控技术有限公司 | High-voltage pulse device of charging mechanism of metal magnesium smelting high pressure slag-removing and charging machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20151127 |