CN202784855U - Pebble coal feeding device having separation function - Google Patents

Pebble coal feeding device having separation function Download PDF

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Publication number
CN202784855U
CN202784855U CN 201220490925 CN201220490925U CN202784855U CN 202784855 U CN202784855 U CN 202784855U CN 201220490925 CN201220490925 CN 201220490925 CN 201220490925 U CN201220490925 U CN 201220490925U CN 202784855 U CN202784855 U CN 202784855U
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CN
China
Prior art keywords
separation
pipeline
pebble coal
separation chamber
feeding device
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 201220490925
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Chinese (zh)
Inventor
刘栋
汤培荣
杨晓勇
丁剑
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Jiangsu University
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Jiangsu University
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 University filed Critical Jiangsu University
Priority to CN 201220490925 priority Critical patent/CN202784855U/en
Application granted granted Critical
Publication of CN202784855U publication Critical patent/CN202784855U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a pebble coal feeding device having a separation function, and relates to material feeding components in a thermal power plant pebble coal pneumatic conveying system. The pebble coal feeding device having the separation function comprises a separation section pipeline, a material collection device and a feeding pipe which are connected with a spiral feeder are installed above the separation section pipeline, a bent pipe section made of a flexible pipe is installed on the front portion of the separation section pipeline, a shrink air inlet pipe is connected with the bent pipe section, the air inlet direction of the air inlet pipe is adjusted by means of changes of bending of the bent pipe section, and particle size ranges of pebble coal needing separating are changed through adjustment of the air inlet direction. A separation chamber is installed below the separation section pipeline, a discharging port communicated with a negative pressure pipeline of the pneumatic conveying system is installed on the rear portion of the separation chamber, a flange is installed at the right end of the discharging port, and the flange can be directly connected with the pneumatic conveying system. The pebble coal feeding device having the separation function is simple in structure, obvious in separation effect, and capable of effectively improving reliability of long-time operation of the pebble coal pneumatic conveying system.

Description

A kind of pebble coal feeding device with separation function
Technical field
The utility model relates to a kind of mass transport parts for thermal power plant's stone coal pneumatic transmitting system, specifically a kind of possess separate large particle diameter pebble coal feeding device.
Background technology
In the widely used coal mill operational process of thermal power plant, can produce a large amount of pebble coals, its main component is large, the difficult spoil that grinds of density in the raw coal, iron pyrite etc., its discharge side from its bottom when coal mill moves is discharged.A large amount of pebble coals of discharging need in time be transported away, otherwise can be in coal mill bulk deposition, the pebble coal of accumulation also can stop up the air channel, causes coal mill fault fortune to stop.
Common stone coal discharge has the modes such as manual emission, hydraulic discharge, mechanical transportation.At present, thermal power plant's coal consumption is very large, and the general variation of raw coal ature of coal, and the foreign material such as the stone in the raw coal, ore increase than before, the stone coal discharge amount of thereupon bringing also increases greatly, and conventional stone coal discharge mode has been difficult to solve the problem that present pebble coal increases greatly.
In recent years, more domestic power plant have adopted air-transport system to process the emission problem of pebble coal.Air-transport system is that a kind of air-flow that utilizes is as carrier; in the mass transport mode of certain speed transferring bulk cargo, with respect to other mass transport mode, strength is carried has the transport efficiency height; the equipment structure is safeguarded simple, is conducive to realize the advantages such as automation conveying and environmental protection.
Still there are some problems in the air-transport system of the pebble coal of real-world operation at present; wherein; what have a strong impact on production process is the pipe choking problem of air-transport system; it mainly is owing to there is the larger particle of part particle diameter (mainly be 〉=50mm pebble coal) in the pebble coal; these particles kinematic velocity in pipeline is lower; and easy blocking pipe; small particle diameter pebble coal after stopping up in the pipeline can be at the block part bulk deposition; this has brought very large difficulty for the dredging of pipeline; cause the easy et out of order of air-transport system, often need to shut down maintenance.
Summary of the invention
The purpose of this utility model is in order to improve the line clogging problem in the stone coal pneumatic transmitting system, and it is special and the separation chamber is installed to realize the pneumatic transmission feeding device of large particle diameter pebble coal pre-separation to have proposed a kind of air intake direction.Inevitably can produce a large amount of pebble coals through coal mill, before these bulky grain pebble coals enter main line, be separated, thus the reliability of raising air-transport system.
Pebble coal feeding device with separation function of the present utility model comprises material collecting device, feed pipe, contraction blast pipe, flexible pipe, separation chamber, separation pipeline, conveying pipeline, flange, described contraction blast pipe is connected with the front end that separates pipeline by flexible pipe, change the approach axis of air-flow by the camber of regulating flexible pipe, air-flow enters segregation section obliquely; The segregation section arranged beneath has the separation chamber; Material collecting device is connected to the top of separating the pipeline front end by feed pipe.The rear end of conveying pipeline is furnished with flange, and flange directly links to each other with air-transport system.The separation pipeline diameter is D, and the diameter of feed pipe also is D, and the diameter of separation chamber's inlet point also is D, and the relative position of the inlet point of separation pipeline and the inlet point of feed pipe is 0.25D.
Segregation section pipeline top arranges material collecting device and the feed pipe that is connected with screw feeder, the segregation section front portion is provided with one section bend loss of being made by flexible pipe, shrinking blast pipe links to each other with bend pipe, the air intake direction of regulating blast pipe by the camber that changes bend pipe, by regulating the pebble coal particle size range that the air intake direction changes needs separation, segregation section pipeline below is provided with the separation chamber, the first stripper and the second stripper are set in the separation chamber, the first stripper is located at the middle part of separation chamber, the second stripper is located at the bottom of separation chamber, the first stripper divides the separation chamber for two parts up and down, the pebble coal of part is stacked into to a certain degree in the separation chamber, the first stripper is opened, particle drops to the bottom, separation chamber, stripper was namely closed after for the first time discharging was finished, and then the second stripper of opening the bottom, separation chamber is to extraneous discharging, i.e. for the second time discharging, the purpose that twice discharging is set is that the external world pours in air-flow system stability is impacted during for fear of direct discharging, the rear portion, separation chamber is provided with the conveying pipeline that communicates with the negative-pressure pipeline of air-transport system, at conveying pipeline right-hand member flange has been installed, can directly link to each other with air-transport system, conveniently the bad air-transport system of existing operation is undergone technological transformation, saved time and cost.
Whole system is negative pressure in the utility model, and air-flow enters segregation section obliquely, and air-flow can be decomposed into vertical direction F to the effect that falls particle by feed pipe vWith horizontal direction F hTwo component, simultaneously pebble coal itself is subject to gravity G and resistance F rEffect.Work as F vGreater than the gravity G of pebble coal particle, the pebble coal particle enters main line will do level throw motion upwards under airflow function after.Work as F vLess than the gravity G of pebble coal particle, the pebble coal particle will be done downward level throw motion under airflow function.The pebble coal that particle diameter is larger will be done rear a kind of motion, and the pebble coal particle that part is large will enter the separation chamber, and the residue pebble coal will enter main line, be transported to the appointed place, so just realize the separation of different-grain diameter pebble coal particle.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the path of motion scheme drawing of different-grain diameter pebble coal particle in the utility model.
Among the figure: material collecting device 1, feed pipe 2, contraction blast pipe 3, flexible pipe 4, separation chamber 5, the first stripper 6, the second stripper 7, separation pipeline 8, conveying pipeline 9, flange 10.
The specific embodiment
Flange 10 can directly link to each other with air-transport system, transforms existing system.Coal mill produces the pebble coal particle and is transported to material collecting device 1 through screw feeder, enter separation pipeline 8 through feed pipe 2, whole pipeline is in negative pressure, the air-flow that enters obliquely from blast pipe 3 will carry the less pebble coal particle of particle diameter and enter main line by segregation section 8 is laggard, and large-size particles, mainly be 〉=pebble coal of 50mm, because the component F of the vertical direction that self gravitation G provides greater than air-flow vFall into the separation chamber, so just realized easily blocking up bulky grain pre-separation process.
Fig. 2 is the path of motion scheme drawing of the pebble coal particle of different-grain diameter, show among the figure, the particle of different-grain diameter will have three kinds of multi-form path of motions after entering the separation pipeline, track one is that the less pebble coal of particle diameter produces, these pebble coals will be done level throw motion upwards under airflow function, such particle can not enter into the separation chamber; Track two is that the pebble coal of medium particle diameter produces the air-flow that pebble coal is subject to F vertically upward vLess than the gravity G of pebble coal, its horizontal displacement distance along separator tube is far away, has crossed the separation chamber, therefore also can not enter the separation chamber; Track three is that the pebble coal of large particle diameter produces the air-flow that pebble coal is subject to F vertically upward vLess than the gravity G of pebble coal, its horizontal displacement distance along separator tube is nearer, does not have to surpass the diameter of separation chamber, will fall into the separation chamber.
Stripper 6 and 7 are installed in the separation chamber, with separation chamber 5 minutes for two parts up and down, when the pebble coal on 5 tops, separation chamber stockpiles certain altitude, stripper 6 to be opened, pebble coal drops to the bottom, separation chamber, i.e. for the first time discharging, stripper is closed immediately after finishing, and then the stripper 7 of opening the bottom, separation chamber is to extraneous discharging, i.e. for the second time discharging, the air-flow that has poured in from the bottom, separation chamber when a discharging has been avoided in such operation has been finished discharging simultaneously on the impact of system stability.

Claims (4)

1. pebble coal feeding device with separation function, it is characterized in that, comprise material collecting device (1), feed pipe (2), contraction blast pipe (3), flexible pipe (4), separation chamber (5), separation pipeline (8) and conveying pipeline (9), described contraction blast pipe (3) is connected with the front end that separates pipeline (8) by flexible pipe (4), change the approach axis of air-flow by the camber of regulating flexible pipe (4), air-flow enters segregation section (8) obliquely; Separate pipeline (8) arranged beneath separation chamber (5) is arranged; Material collecting device (1) is connected to the top of separating pipeline (8) front end by feed pipe (2); The rear portion, separation chamber is provided with the conveying pipeline (9) that communicates with the negative-pressure pipeline of air-transport system.
2. a kind of pebble coal feeding device with separation function according to claim 1, it is characterized in that, separating pipeline (8) diameter is D, the diameter of feed pipe (2) also is D, the diameter of separation chamber (8) inlet point also is D, and the relative position of the inlet point of separation pipeline (8) and the inlet point of feed pipe (2) is 0.25D.
3. a kind of pebble coal feeding device with separation function according to claim 1 and 2, it is characterized in that, be furnished with the first stripper (6) and the second stripper (7) in the separation chamber (5), the first stripper (6) is located at the middle part of separation chamber (5), and the second stripper (7) is located at the bottom of separation chamber (5).
4. a kind of pebble coal feeding device with separation function according to claim 1 and 2 is characterized in that, the rear end of described conveying pipeline (9) is furnished with flange (10), and flange (10) directly links to each other with air-transport system.
CN 201220490925 2012-09-25 2012-09-25 Pebble coal feeding device having separation function Expired - Fee Related CN202784855U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220490925 CN202784855U (en) 2012-09-25 2012-09-25 Pebble coal feeding device having separation function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220490925 CN202784855U (en) 2012-09-25 2012-09-25 Pebble coal feeding device having separation function

Publications (1)

Publication Number Publication Date
CN202784855U true CN202784855U (en) 2013-03-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102976102A (en) * 2012-09-25 2013-03-20 江苏大学 Pebble coal feeding device with separation function
CN104925524A (en) * 2015-06-08 2015-09-23 蚌埠市万科硅材料科技有限公司 Discharging port negative-pressure device for producing organic silicon
CN105600451A (en) * 2016-01-28 2016-05-25 湖南三德科技股份有限公司 Pneumatic material conveying system with functions of sweeping and collecting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102976102A (en) * 2012-09-25 2013-03-20 江苏大学 Pebble coal feeding device with separation function
CN102976102B (en) * 2012-09-25 2016-04-06 江苏大学 A kind of pebble coal feeding device with separation function
CN104925524A (en) * 2015-06-08 2015-09-23 蚌埠市万科硅材料科技有限公司 Discharging port negative-pressure device for producing organic silicon
CN104925524B (en) * 2015-06-08 2017-07-11 蚌埠市万科硅材料科技有限公司 A kind of feed opening negative pressure device produced for organosilicon
CN105600451A (en) * 2016-01-28 2016-05-25 湖南三德科技股份有限公司 Pneumatic material conveying system with functions of sweeping and collecting
CN105600451B (en) * 2016-01-28 2018-07-03 湖南三德科技股份有限公司 It is a kind of that there is the material pneumatic conveyer system for cleaning collecting function

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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: 20130313

Termination date: 20140925

EXPY Termination of patent right or utility model