CN101722669A - Pulverized coal molding method without binding agent and double-roller molding machine suitable for method - Google Patents

Pulverized coal molding method without binding agent and double-roller molding machine suitable for method Download PDF

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Publication number
CN101722669A
CN101722669A CN200810224197A CN200810224197A CN101722669A CN 101722669 A CN101722669 A CN 101722669A CN 200810224197 A CN200810224197 A CN 200810224197A CN 200810224197 A CN200810224197 A CN 200810224197A CN 101722669 A CN101722669 A CN 101722669A
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CN
China
Prior art keywords
roller
coal
fine coal
transmission
pit
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.)
Pending
Application number
CN200810224197A
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Chinese (zh)
Inventor
邵俊杰
王继生
朱书全
苏晓辉
张平
郝兵
张光宇
王素玲
曾鸣
何立新
崔郎郎
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.)
BEIJING SHENHUA INTERNATIONAL TECHNOLOGY CO LTD
China University of Mining and Technology CUMT
Shenhua Group Corp Ltd
China University of Mining and Technology Beijing CUMTB
CITIC Heavy Industries Co Ltd
Shenhua International Trading Co Ltd
Original Assignee
BEIJING SHENHUA INTERNATIONAL TECHNOLOGY CO LTD
Shenhua Group Corp Ltd
China University of Mining and Technology Beijing CUMTB
CITIC Heavy Industries Co Ltd
Shenhua International Trading 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 BEIJING SHENHUA INTERNATIONAL TECHNOLOGY CO LTD, Shenhua Group Corp Ltd, China University of Mining and Technology Beijing CUMTB, CITIC Heavy Industries Co Ltd, Shenhua International Trading Co Ltd filed Critical BEIJING SHENHUA INTERNATIONAL TECHNOLOGY CO LTD
Priority to CN200810224197A priority Critical patent/CN101722669A/en
Publication of CN101722669A publication Critical patent/CN101722669A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B11/00Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/16Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers

Abstract

The invention provides a pulverized coal molding method without binding agent, which comprises the following steps of: 1. screening pulverized coal with the granularity of not more than 6mm by a screening device, carrying out drying dehydration processing on the pulverized coal and controlling the water content to be 2-15 percent; 2. forcibly compressing and feeding the pulverized coal obtained in the step 1 into a seam between double rollers of a double-roller molding machine by a feeding machine; and 3. running the double-roller molding machine, continuously rotating the double rollers of which at least one roller circular surface is distributed with pits and compacting and molding molded coal by the pits. The invention also provides the double-roller molding machine which is suitable for the method. The invention solves the problem of pulverized coal molding without binding agent of weak caking coal and non-caking coal, such as low-order bituminous coal, middle and old aged lignite, and the like.

Description

The roller briquetting machine of a kind of fine coal binder free forming method and this method of being suitable for
Technical field
The present invention relates to the coal powder formation method, particularly a kind of fine coal binder free forming method that is suitable for weakly caking coal such as para bituminous coal, person in middle and old age's brown coal and dross coal, and the invention still further relates to a kind of roller briquetting machine that is suitable for this method.
Background technology
Coal is one of world's main energy sources, and in China's production of energy and consumption, coal occupy leading position.But compare with other energy, the coal utilization of directly burning can bring problem of environmental pollution.Therefore, clean coal technology is all being developed energetically in countries in the world.Moulded coal receives much concern as a kind of clean coal technology product.Main powdered coal formation comprises binding agent moulding and binder free moulding two big classes at present, generally adopts punching press and roll-forming technology, and corresponding make-up machine has impact molding machine and two kinds of patterns of roller briquetting machine.
In the binder free moulding, for example: publication number is " moulding of brown coal binder free " patent application of CN1030933A, uses the superheated steam thermal dehydration to 10-25% person in middle and old age's brown coal raw material, extrusion modling in mould; Publication number is CN1109498A's " old brown coal binder free moulding process and make-up machine thereof " patent application, old brown coal is heated to 80-300 ℃ together with mould uses the forcing press extrusion forming, mechanical automatic demoulding in mould; Publication number is CN1456644A's " the clean moulded coal cold compression molding method of binder free " patent application, and mixing such as anthracite, coke powder coal, brown coal, spoil are rolled, and uses forcing press cold moudling in mould.
Above related application or moulding moisture are higher, or need be heated to higher temperature, or need plurality of raw materials to cooperate, and all are extrusion modlings on single mould, intermittently operated.The technology relative complex can't realize large-scale continuous industrial production.
In addition, in powdered coal formation, the punch forming technology is mainly used in the binder free moulding of young brown coal, and the roll-forming technology is mainly used in fine coal the binding agent moulding is arranged.The punch forming technology adopts the intermittent mode operation, has shortcomings such as the diel wearing and tearing are big, the make-up machine per unit area yield is low, power consumption is big, and technology is progressively eliminated.The roll-forming technology adopts the moulding of roller briquetting machine powdered coal adhesion agent, needs by a certain percentage, adds binding agent, binding agent and fine coal be rolled to mix, and initial briquette strength is low, and green briquette also needs to carry out the dried or cured post processing of Denging.There is the process system complexity, adds organic binder bond and have that the binding agent source is wide, cost is high, add inorganic binder and have problems such as moulded coal caloric value reduction.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of fine coal binder free forming method, and this method comprises:
First step filters out the fine coal of granularity≤6mm by screening plant, and this fine coal is carried out drying and dehydrating handle, and the control moisture is 2-15%;
Second step, with the fine coal of first step gained by the feeding machine enforce compression be fed into roller briquetting machine between roller gap;
Third step, the roller briquetting machine running, the pair roller that is furnished with pit on the circular surfaces of at least one roller rotates continuously, goes out moulded coal by described pit compaction moulding.
Preferably, fine coal binder free forming method of the present invention also comprises: the fine coal of granularity>6mm is pulverized the back for the step of handling in described first step by the broken coal device.
Preferably, in the fine coal binder free forming method of the present invention, the form wire pressure of the pair roller of described roller briquetting machine is 5-12kN/mm.
Preferably, in the fine coal binder free forming method of the present invention, after pit left the pressure area, the moulded coal in the pit was by the elastic expansion automatic demoulding of moulded coal.
Preferably, in the fine coal binder free forming method of the present invention, according to the shape of the pit on the circular surfaces of roller, moulded coal be shaped as pillow or drops or half pillow or half drops.
In addition, corresponding to fine coal binder free forming method of the present invention, the invention allows for a kind of roller briquetting machine, it comprises: frame, drive unit, the pair roller that is arranged in frame and is parallel to each other, is arranged side by side, with the transmission device of transmission of power to described pair roller, and the feeding machine between the roll gap that is fed into pair roller is compressed fine coal in pressure; Described roller briquetting machine is suitable for above-mentioned fine coal binder free forming method, push the moulding moulded coal by the rotation of pair roller, wherein, a roller in the pair roller can radially relative another roller level move back and forth, the circular surfaces distribution pit of a roller, the circular surfaces of another roller is a smooth surface, and adopts two to overlap each roller that transmission device independently drives described pair roller respectively.Wherein, described transmission device can be a decelerator.
Simultaneously, corresponding to fine coal binder free forming method of the present invention, the invention allows for another kind of roller briquetting machine, comprise: frame, drive unit, the pair roller that is arranged in frame and is parallel to each other, is arranged side by side, with the transmission device of transmission of power to described pair roller, and the feeding machine between the roll gap that is fed into pair roller is compressed fine coal in pressure; Described roller briquetting machine is suitable for above-mentioned fine coal binder free forming method, push the moulding moulded coal by the rotation of pair roller, wherein, a roller in the pair roller can radially relative another roller level move back and forth, the circular surfaces of each roller of the described pair roller pit that all distributes, and the pit on the circular surfaces of two rollers corresponds to each other, and only adopts each roller of a described pair roller of transmission device driven in synchronism, makes that the moulded coal of make-up machine compacting is spherical for putting in order.Preferably, in above-mentioned roller briquetting machine, described transmission device is single input dual output type speed reducer.
In above-mentioned two kinds of roller briquetting machines, also comprise the torsion supporting arrangement, described torsion supporting arrangement is fixedlyed connected with decelerator, and unitary rotation takes place when preventing the decelerator output torque.
The roller briquetting machine of fine coal binder free forming method of the present invention and this method of being suitable for has the following advantages:
Realized fine coal, particularly transportation and commercial Application requirement have been satisfied in the moulded coal manufacturing of weakly caking coal such as para bituminous coal, person in middle and old age's brown coal and dross coal;
Do not add binding agent, save binding agent preparation, binding agent and fine coal evenly mix pinch, technical process such as green briquette dry solidification;
Simplified the raw coal preparatory technology, only needed fine coal moisture is controlled to 2-15%, the fine coal temperature has not been required;
The form wire pressure of pair roller is 5-12kN/mm, has strengthened between pulverized coal particle the cohesive force of self;
In addition, the present invention compares with the technical scheme of publication number CN1109498A " old brown coal binder free moulding process and make-up machine thereof ", simplify the raw coal preparatory technology, and be on roller pressing forming machine, to have realized the moulding of fine coal binder free, can realize serialization large-scale production.
In addition, roller briquetting machine of the present invention, when the circular surfaces of the circular surfaces distribution pit of a roller, another roller is smooth surface, adopt two to overlap each roller that transmission device independently drives described pair roller respectively, need not consider the problem that transmission system is synchronous this moment, control system is simplified, had the characteristics of balling-up intensity height, reducer structure compactness; And the pit on the circular surfaces of each roller of pair roller all distributes the circular surfaces of pit and two rollers is when corresponding to each other, only adopt two rollers of a transmission system driven in synchronism more favourable, reducer structure is single input lose-lose removing from mould, has the high characteristics of output.
Description of drawings
Fig. 1 is the side structure schematic diagram of roller briquetting machine of the present invention;
Fig. 2 is the cross section structure schematic diagram that the A-A line along Fig. 1 of roller briquetting machine of the present invention intercepts.
Description of reference numerals:
1: frame
2,3: pair roller
4: feeding machine
5: drive unit
6: transmission device
7: the torsion supporting arrangement
The specific embodiment
Below, in conjunction with Fig. 1,2, the specific embodiment of the present invention is specifically described.
Fine coal binder free forming method of the present invention may further comprise the steps: first step, and filter out the fine coal of granularity≤6mm by screening plant, and this fine coal is carried out drying and dehydrating handle, the control moisture is 2-15%; Second step is fed into the fine coal of first step gained between the roll gap of pair roller 2,3 of roller briquetting machine by feeding machine 4 (preferred screw feeder) enforce compression; Third step, the roller briquetting machine running, the pair roller that is furnished with pit on the circular surfaces of at least one roller rotates continuously, goes out moulded coal by described pit compaction moulding.
In fine coal binder free forming method of the present invention, can also comprise: the fine coal of granularity>6mm is pulverized the back for the step of handling in described first step by the broken coal device.
And, when the roll-forming moulded coal, can apply horizontal thrust by for example hydraulic system pair roller, the form wire pressure that makes the pair roller of described roller briquetting machine is 5-12kN/mm.So-called form wire pressure is meant the pressure that carries along on the wide every 1mm length of roller.
After pit left the pressure area, promptly when pit rotated to the Lower Half of roller, the moulded coal in the pit was by the elastic expansion automatic demoulding of moulded coal.
In addition, according to the shape of the pit on the circular surfaces of roller, the shape of moulded coal can become pillow or drops or half pillow or half drops.
By this fine coal binder free forming method, technological parameter can be adjusted, and can realize continuous industry production, can suppress the moulded coal of different size according to different purposes and requirement, and the moulded coal density that forms reaches more than 85% of material real density.
In addition, as depicted in figs. 1 and 2, a kind of roller briquetting machine is provided, comprise: frame 1, drive unit 5, the pair roller 2,3 that is arranged in frame 1 and is parallel to each other, is arranged side by side, with the transmission device 6 of transmission of power to described pair roller 2,3, and the feeding machine 4 between the roll gap that is fed into pair roller 2,3 is compressed fine coal in pressure.This roller briquetting machine is applicable to above-mentioned fine coal binder free forming method, pushes the moulding moulded coal by the rotation of pair roller 2,3.
Wherein, a roller in the pair roller can radially relative another roller level move back and forth.
A kind of roller briquetting machine of the present invention has following structure, i.e. the circular surfaces distribution pit of a roller, and the circular surfaces of another roller is a smooth surface.In this case, can consider the synchronous rotation of two rollers, adopt two to overlap independently that transmission device drives each roller respectively.Wherein, described transmission device for example is a planetary reduction gear.Planetary reduction gear has little, the in light weight and bearing capacity height of volume, transmit that speed ratio is big, the long characteristics of life-span of gear and bearing.
The preferred another kind of roller briquetting machine of the present invention has following structure, i.e. the circular surfaces of each roller of the pair roller pit that all distributes, and the pit on the circular surfaces of two rollers corresponds to each other.In this case, only adopt each roller of a described pair roller of transmission device driven in synchronism, make that the moulded coal of make-up machine compacting is spherical for putting in order.Wherein, transmission device can adopt single input dual output type speed reducer (can be the planetary reduction gear of single input lose-lose removing from mould), thereby can guarantee the driven in synchronism pair roller.
As shown in Figure 1, two kinds of above-mentioned roller briquetting machines also can comprise torsion supporting arrangement 7, and described torsion supporting arrangement 7 is fixedlyed connected with described transmission device 6, and unitary rotation takes place when preventing transmission device 6 output torques.
In addition, the frame 1 in the roller briquetting machine of the present invention can adopt the radial type structure, and both sides can be opened, mainly by base, and stand, middle stand, upper and lower crossbeams etc. are partly formed.The frame of articulated structure satisfies the requirement of high-pressure molding, has good rigidly, precision height, overhauls characteristics such as convenient.
Described feeding machine 4 can be a screw feeder, and it mainly contains compositions such as material bin, cylindrical shell, drive motors, compression spiral, feed inlet and outlet, material level device, passage.The compression spiral adopts senior high-abrasive material, have use reliable, wearability is good.The different pitch of utilization helical feed process by the transition of setting requirement equal proportion spiral, make material to material in quantitative course of conveying, realize quantitatively compression simultaneously.Thereby simple, easy to operate, the easy maintenance of this apparatus structure.
In addition, in fine coal binder free forming method of the present invention and the roller briquetting machine, can adopt adjustable frequency motor, it has the pair roller of adjusting speed, and control roller briquetting machine production capacity is improved characteristics such as squeezing effect.
And the demand for the requirement of satisfying high-temperature molding technology and equipment run well can be provided with cooling-cycle device at the key position of roller briquetting machine of the present invention, as the cooling of base bearing, the cooling of pair roller, the cooling of decelerator etc.

Claims (10)

1. a fine coal binder free forming method is characterized in that, comprising:
First step filters out the fine coal of granularity≤6mm by screening plant, and this fine coal is carried out drying and dehydrating handle, and the control moisture is 2-15%;
Second step, with the fine coal of first step gained by the feeding machine enforce compression be fed into roller briquetting machine between roller gap;
Third step, the roller briquetting machine running, the pair roller that is furnished with pit on the circular surfaces of at least one roller rotates continuously, goes out moulded coal by described pit compaction moulding.
2. fine coal binder free forming method according to claim 1 is characterized in that, also comprises: the fine coal of granularity>6mm is pulverized the back for the step of handling in described first step by the broken coal device.
3. fine coal binder free forming method according to claim 2 is characterized in that the form wire pressure of the pair roller of described roller briquetting machine is 5-12kN/mm.
4. according to any described fine coal binder free forming method among the claim 1-3, it is characterized in that after pit left the pressure area, the moulded coal in the pit was by the elastic expansion automatic demoulding of moulded coal.
5. fine coal binder free forming method according to claim 4 is characterized in that, according to the shape of the pit on the circular surfaces of roller, moulded coal be shaped as pillow or drops or half pillow or half drops.
6. the roller briquetting machine of any described fine coal binder free forming method among the suitable claim 1-5, comprise: frame, drive unit, the pair roller that is arranged in frame and is parallel to each other, is arranged side by side, with the transmission device of transmission of power to described pair roller, and the feeding machine between the roll gap that is fed into pair roller is compressed fine coal in pressure; Push the moulding moulded coal by the rotation of pair roller, it is characterized in that, a roller in the pair roller can radially relative another roller level move back and forth, the circular surfaces distribution pit of a roller, the circular surfaces of another roller is a smooth surface, and adopts two to overlap each roller that transmission device independently drives described pair roller respectively.
7. roller briquetting machine according to claim 6, it is characterized in that, described transmission device is a planetary reduction gear, and described roller briquetting machine also comprises the torsion supporting arrangement, described torsion supporting arrangement is fixedlyed connected with described planetary reduction gear, and unitary rotation takes place when preventing described planetary reduction gear output torque.
8. the roller briquetting machine of any described fine coal binder free forming method among the suitable claim 1-5, comprise: frame, drive unit, the pair roller that is arranged in frame and is parallel to each other, is arranged side by side, with the transmission device of transmission of power to described pair roller, and the feeding machine between the roll gap that is fed into pair roller is compressed fine coal in pressure; Push the moulding moulded coal by the rotation of pair roller, it is characterized in that, a roller in the pair roller can radially relative another roller level move back and forth, the circular surfaces of each roller of the described pair roller pit that all distributes, and the pit on the circular surfaces of two rollers corresponds to each other, and only adopt each roller of a described pair roller of transmission device driven in synchronism, make the moulded coal of make-up machine compacting for whole spherical.
9. roller briquetting machine according to claim 8 is characterized in that, described transmission device is single input dual output type speed reducer.
10. roller briquetting machine according to claim 9, it is characterized in that, described transmission device is the planetary reduction gear of single input lose-lose removing from mould, and described roller briquetting machine also comprises a torsion supporting arrangement, this torsion supporting arrangement is fixedlyed connected with described planetary reduction gear, and unitary rotation takes place when preventing described planetary reduction gear output torque.
CN200810224197A 2008-10-27 2008-10-27 Pulverized coal molding method without binding agent and double-roller molding machine suitable for method Pending CN101722669A (en)

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Application Number Priority Date Filing Date Title
CN200810224197A CN101722669A (en) 2008-10-27 2008-10-27 Pulverized coal molding method without binding agent and double-roller molding machine suitable for method

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103074139A (en) * 2012-12-27 2013-05-01 中信重工机械股份有限公司 Upgrading method for molding semicokes produced through pyrolyzing water-rich lignite
CN103087796A (en) * 2013-02-07 2013-05-08 中国矿业大学 Process and system for vibration hot-pressing dehydration quality improvement of brown coal
CN103525495A (en) * 2013-11-04 2014-01-22 江苏良友农牧机械有限公司 Coal dust pelletizing method
CN103627467A (en) * 2013-10-21 2014-03-12 中信重工机械股份有限公司 Drying, upgrading and forming process of lignite rich in water
CN105441153A (en) * 2015-12-07 2016-03-30 北京神雾环境能源科技集团股份有限公司 Binder-free lignite forming system and forming technology
CN109523177A (en) * 2018-11-21 2019-03-26 武汉钢铁有限公司 The method for improving coal powder formation rate and shaping strength
CN109628188A (en) * 2019-01-07 2019-04-16 武汉钢铁有限公司 The forming method of the dry coking coal of bindless
EP3438048A4 (en) * 2016-03-31 2019-12-04 China Energy Investment Corporation Limited Preparation method for binder-free, coal-based, briquetted activated carbon

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103074139A (en) * 2012-12-27 2013-05-01 中信重工机械股份有限公司 Upgrading method for molding semicokes produced through pyrolyzing water-rich lignite
CN103087796A (en) * 2013-02-07 2013-05-08 中国矿业大学 Process and system for vibration hot-pressing dehydration quality improvement of brown coal
CN103087796B (en) * 2013-02-07 2014-04-16 中国矿业大学 Process and system for vibration hot-pressing dehydration and quality improvement of brown coal
CN103627467A (en) * 2013-10-21 2014-03-12 中信重工机械股份有限公司 Drying, upgrading and forming process of lignite rich in water
CN103525495A (en) * 2013-11-04 2014-01-22 江苏良友农牧机械有限公司 Coal dust pelletizing method
CN105441153A (en) * 2015-12-07 2016-03-30 北京神雾环境能源科技集团股份有限公司 Binder-free lignite forming system and forming technology
CN105441153B (en) * 2015-12-07 2017-11-24 神雾科技集团股份有限公司 A kind of binder free Moulding Process of Brown Coal system and moulding process
EP3438048A4 (en) * 2016-03-31 2019-12-04 China Energy Investment Corporation Limited Preparation method for binder-free, coal-based, briquetted activated carbon
US10773962B2 (en) 2016-03-31 2020-09-15 China Energy Investment Corporation Limited Preparation method for binder-free, coal-based, briquetted activated carbon
CN109523177A (en) * 2018-11-21 2019-03-26 武汉钢铁有限公司 The method for improving coal powder formation rate and shaping strength
CN109628188A (en) * 2019-01-07 2019-04-16 武汉钢铁有限公司 The forming method of the dry coking coal of bindless

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Application publication date: 20100609