CN202935943U - Dual adjustable pebble coal positive pressure force feeding device - Google Patents

Dual adjustable pebble coal positive pressure force feeding device Download PDF

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Publication number
CN202935943U
CN202935943U CN 201220633648 CN201220633648U CN202935943U CN 202935943 U CN202935943 U CN 202935943U CN 201220633648 CN201220633648 CN 201220633648 CN 201220633648 U CN201220633648 U CN 201220633648U CN 202935943 U CN202935943 U CN 202935943U
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CN
China
Prior art keywords
pebble coal
positive pressure
conveying
feeding warehouse
feeding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220633648
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Chinese (zh)
Inventor
时勇强
丁为平
何仰朋
刘定坡
张峰
范庆伟
刘洋
陈太文
陈克祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU ZHONGNENG POWER EQUIPMENT CO Ltd
Xian Thermal Power Research Institute Co Ltd
Original Assignee
JIANGSU ZHONGNENG POWER EQUIPMENT CO Ltd
Xian Thermal Power Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU ZHONGNENG POWER EQUIPMENT CO Ltd, Xian Thermal Power Research Institute Co Ltd filed Critical JIANGSU ZHONGNENG POWER EQUIPMENT CO Ltd
Priority to CN 201220633648 priority Critical patent/CN202935943U/en
Application granted granted Critical
Publication of CN202935943U publication Critical patent/CN202935943U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a dual adjustable pebble coal positive pressure force feeding device which is used in a medium speed mill pebble coal discharging system in a heat-engine plant. The dual adjustable pebble coal positive pressure force feeding device comprises a feeding bin. A feeding inlet is arranged in the top portion of the front section of the feeding bin. A horizontal separation plate is arranged in the middle of the front section of the feeding bin. Two air inlet holes are formed in the front section of the feeding bin, wherein the two air inlet holes are respectively located above the separation plate and below the separation plate. The air inlet hole above the separation plate passes through a section of blanking air pipe and is connected with a compressed air pipeline. The air inlet hole below the separation plate passes through a section of conveying air pipe and is connected with the compressed air pipeline. Flow adjusting devices are arranged on the blanking air pipe and the conveying air pipe. A discharging hole connected with a pebble coal conveying pipeline is formed in the rear end of the feeding bin. According to the dual adjustable pebble coal positive pressure force feeding device, no rotary parts are adopted, reliability is high, both feeding amount and conveying amount can be adjusted, energy consumption is low, and conveying of pebble coal with large size can be achieved.

Description

Two adjustable type pebble coal positive pressure pneumatic feed arrangements
Technical field
The utility model relates to a kind of two adjustable type pebble coal positive pressure pneumatic feed arrangements for the medium speed mill in heat-engine plant removing gangue system.
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;
If the employing positive pneumatic conveying system the problems referred to above can not occur, positive pneumatic conveying system is compared with negative-pressure pneumatic transmission system and is had the following advantages:
1, the pumped (conveying) medium of positive-pressure pneumatic conveying is pressurized air, and under same operting differential pressure, compression fan is more much lower than the energy consumption of roots blower, and the energy consumption of whole system is also corresponding lower;
2, the air-flow velocity of system's end is lower, and is very little for the wearing and tearing of equipment and pipeline;
3, compressed-air actuated pressure can reach very high, and the traffic capacity of positive pneumatic conveying system will be far longer than negative-pressure pneumatic transmission system;
4, compare with roots blower, the noise of compression fan is much smaller.
Traditional positive pneumatic conveying system generally adopts storehouse pump or screw feeder as feeding device, specific physical due to pebble coal, storehouse pump and screw feeder all can't be realized the normal feed of pebble coal, as seen, suitable pebble coal feeding device becomes the essential condition that the pebble coal positive pressure pneumatic delivery system can be used.
Summary of the invention
Technical problem to be solved in the utility model is that two adjustable type pebble coal positive pressure pneumatic feed arrangements that a kind of pumped (conveying) medium amount is adjustable, energy consumption is low, reliable are provided.
Of the present utility model pair of adjustable type pebble coal positive pressure pneumatic 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.
The utility model device does not adopt any tumbler, and reliability is high, and discharge quantity and conveying Jie measure two adjustable, and energy consumption is low, can carry large particle diameter pebble coal.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 structural representation of the utility model embodiment.
The specific embodiment
As shown in the figure, this pair adjustable type pebble coal positive pressure pneumatic feed arrangement includes a feeding warehouse 1, and feeding warehouse leading portion top arranges inlet point 2, and feeding warehouse leading portion middle part is provided with the separator of battery plates 3 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 4, the ventilation inlet of below carries this P of airduct 5 and compressed air piping to be connected 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 6 that is connected with the pebble coal delivery duct.Be provided with a receiving hopper 7 on inlet point 2, be connected with the pulse loose tube 8 that can pass into air pulse on the sidewall of receiving hopper.The feeding warehouse back segment is provided with the springboard 9 of the level that is positioned at separator of battery plates 3 back lower places.

Claims (3)

1. a two adjustable type pebble coal positive pressure pneumatic feed arrangement, include a feeding warehouse (1), and feeding warehouse leading portion top arranges inlet point (2), it is characterized in that: feeding warehouse (1) leading portion middle part is provided with the separator of battery plates (3) 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 (4), the ventilation inlet of below carries airduct (5) 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 (6) that is connected with the pebble coal delivery duct.
2. according to claim 1 pair of adjustable type pebble coal positive pressure pneumatic feed arrangement, is characterized in that: be provided with a receiving hopper (7) on inlet point (2), be connected with the pulse loose tube (8) that can pass into air pulse on the sidewall of receiving hopper.
3. according to claim 1 pair of adjustable type pebble coal positive pressure pneumatic feed arrangement is characterized in that: the feeding warehouse back segment is provided with the springboard (9) of the level that is positioned at separator of battery plates (3) back lower place.
CN 201220633648 2012-11-27 2012-11-27 Dual adjustable pebble coal positive pressure force feeding device Expired - Fee Related CN202935943U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220633648 CN202935943U (en) 2012-11-27 2012-11-27 Dual adjustable pebble coal positive pressure force feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220633648 CN202935943U (en) 2012-11-27 2012-11-27 Dual adjustable pebble coal positive pressure force feeding device

Publications (1)

Publication Number Publication Date
CN202935943U true CN202935943U (en) 2013-05-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220633648 Expired - Fee Related CN202935943U (en) 2012-11-27 2012-11-27 Dual adjustable pebble coal positive pressure force feeding device

Country Status (1)

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CN (1) CN202935943U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102935944A (en) * 2012-11-27 2013-02-20 西安热工研究院有限公司 Dual-adjustable pebble coal positive-pressure pneumatic feeding device
CN106629073A (en) * 2016-12-17 2017-05-10 新乡市振英机械设备有限公司 Vacuum sucking breathing valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102935944A (en) * 2012-11-27 2013-02-20 西安热工研究院有限公司 Dual-adjustable pebble coal positive-pressure pneumatic feeding device
CN106629073A (en) * 2016-12-17 2017-05-10 新乡市振英机械设备有限公司 Vacuum sucking breathing valve

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Legal Events

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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