CN102304376B - Full-boiling vibration propelled coal moisture control process - Google Patents

Full-boiling vibration propelled coal moisture control process Download PDF

Info

Publication number
CN102304376B
CN102304376B CN2011100842171A CN201110084217A CN102304376B CN 102304376 B CN102304376 B CN 102304376B CN 2011100842171 A CN2011100842171 A CN 2011100842171A CN 201110084217 A CN201110084217 A CN 201110084217A CN 102304376 B CN102304376 B CN 102304376B
Authority
CN
China
Prior art keywords
coal
damping
air
charge
machine
Prior art date
Application number
CN2011100842171A
Other languages
Chinese (zh)
Other versions
CN102304376A (en
Inventor
蔡承祐
尹华
马增礼
王充
王满
霍延中
高飞
李旭东
Original Assignee
中冶焦耐(大连)工程技术有限公司
中冶焦耐工程技术有限公司
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 中冶焦耐(大连)工程技术有限公司, 中冶焦耐工程技术有限公司 filed Critical 中冶焦耐(大连)工程技术有限公司
Priority to CN2011100842171A priority Critical patent/CN102304376B/en
Publication of CN102304376A publication Critical patent/CN102304376A/en
Application granted granted Critical
Publication of CN102304376B publication Critical patent/CN102304376B/en

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

The invention relates to a full-boiling vibration propelled coal moisture control process. In the process, coke oven flue gas is taken as a heat source, a coal moisture control machine is adopted as coal fluidizing and moisture control equipment, and crushed coal material is subjected to moisture control uniformly and efficiently according to a characteristic that raw material coal has high heat and mass transfer efficiency in a full-boiling state and low heat and mass transfer efficiency in a fixed bed and half-boiling fluidized state by a working principle of a vibrofluidized bed; and the coke oven flue gas enters the coal moisture control machine through secondary air, the primary air is used for fluidizing and moisture control of the raw material coal and the secondary air is used for further moisture control of fine and micro particle coal material and preventing tail flue gas from dewing. The full-boiling vibration propelled coal moisture control process has the advantages that: the coke oven flue gas is taken as the heat source, waste heat is fully recycled for coal moisture control, a great deal of high potential energy can be saved, and energy-saving effect is more obvious; and the heat and mass transfer efficiency is high, and the moisture control effect is good.

Description

The pusher coal humidifying technology of full boiling vibration

Technical field

The present invention relates to a kind of new moulded coal preparatory technology, be applicable to coke making process pulverizing back feed coal damping.

Background technology

Industrialized coal conditioning technique in the world at present, roughly be divided into the three generations by its development course: first-generation coal conditioning technique adopts thermal oil to reclaim the waste heat of coke oven flue gas and the sensible heat of coke oven coke oven uprising tube, and in rotary shelf drier, with thermal oil coal charge is carried out indirect heating, thereby make the dry damping of coal charge.It is thermal barrier that s-generation coal conditioning technique adopts steam, in multi-tube revolving drier, with steam coal charge is carried out indirect heating, thereby makes the dry damping of coal charge.First-generation rotary shelf drier coal damping system process complexity, equipment is huge, and operation link is many, invests higherly, seldom uses now; The s-generation is the coal damping system of thermal barrier with steam, can't satisfy the user and utilize the further requirements of saving energy of coke oven flue gas waste heat.

It is thermal barrier that third generation coal conditioning technique adopts coke oven flue waste gas, and hot flue gas and wet coal carry out direct heat exchange in fluidized-bed, thereby makes the dry damping of coal charge.

At present, third generation coal conditioning technique has been realized industrial applications in Japanese coke-oven plant, and does not domesticly also have an industrial applications example.

Summary of the invention

The purpose of this invention is to provide a kind of is that pusher coal humidifying technology is vibrated in the full boiling of thermal source with coke oven flue waste gas, this process using coke oven flue waste gas is as thermal medium, according to feed coal inefficient characteristics of heat and mass under heat and mass efficient height, fixed bed and the fluidized state of partly seething with excitement under the full boiling state, utilize the principle of work of vibrated fluidized bed, make most of coal charge in the coal damping machine, be in full boiling fluidized state, and small part macrobead coal charge is under the effect of rapping power, and damping limit, limit advances to coal damping machine damping coal export.The coal charge of size fractionated has different total moisture contents, and kinestate and heat exchange state also have nothing in common with each other in the coal damping machine.By the control different-grain diameter residence time of coal charge in bed, can realize even damping and the highly effective humidity conditioning of coal.Do not need to carry out the coal charge classification owing to pulverize the back coal charge, so only utilize the principle of work of vibrated fluidized bed to realize the even damping of coal charge, and get back to coal damping machine damping coal export and outflow thus through the coal charge major part after the damping, has only small part subparticle damping coal with the air flow stream damping machine that produces coal, reduce the equipment running resistance with this, reduce systematic running cost and use.

For achieving the above object, the present invention is achieved through the following technical solutions:

The pusher coal humidifying technology of full boiling vibration, this technology is thermal source with coke oven flue waste gas, adopt the coal damping machine as fluidisation, the damping equipment of coal charge, according to feed coal heat and mass efficient height under the full boiling state, under fixed bed and the fluidized state of partly seething with excitement the inefficient characteristics of heat and mass, utilize the principle of work of vibrated fluidized bed, the back coal charge carries out evenly to pulverizing, highly effective humidity conditioning; Coke oven flue waste gas branch secondary air enters the coal damping machine, and a wind is used for fluidisation and the damping of feed coal, further damping thin, the microparticle coal charge that secondary air is used for, and prevent the tail flue gas dewfall, concrete steps are as follows:

1) described coal damping machine involving vibrations grid distributor, damping disengaging zone, stream collision type gas-solid separator, secondary damping disengaging zone, blast inlet, secondary air mouth, feed coal entrance, damping coal export, air stream outlet, one time blast inlet is positioned at vibration distribution plate bottom, and vibration distribution plate upper area is a damping disengaging zone; Described vibration distribution plate is the vibratory liquefaction bed structure that is obliquely installed, and the feed coal entrance is positioned on the coal damping machine sidewall of vibration distribution plate hight end, and the damping coal export is positioned on the coal damping machine sidewall of vibration distribution plate low side; Top, a damping disengaging zone is provided with streams the collision type gas-solid separator, and streaming collision type gas-solid separator top is secondary damping disengaging zone; The secondary air mouth is positioned at bottom, secondary damping disengaging zone, and air stream outlet is arranged at coal damping machine top; Air flow outlet is provided with air outlet collision type gas-solid separator;

2) coke oven flue gas is delivered to coal damping machine vibration distribution plate bottom under the induced draft fan effect, and feed coal enters coal damping machine vibration distribution plate top by the feed coal entrance; Feed coal contacts with a wind stack gas in the coal damping machine, finishes coal charge fluidisation, granule diffusing, the macrobead damping coal discharging of shaking; Most of coal charge is under the effect of a wind stack gas, be in full boiling fluidized state, full the boiling fluidized material that blows afloat enters coal damping machine middle part with air-flow, small part macrobead coal charge is under the effect of vibration distribution plate rapping power, damping on one side, to damping coal export direction advance on one side;

3) fluidized material that seethes with excitement entirely enters the damping disengaging zone at coal damping machine middle part, enter the macrobead coal charge of a damping disengaging zone under inertia effect, return vibrated fluidized bed and participate in the cycle heat exchange damping, and progressively flow to the damping coal export, finally discharged by the damping coal export; In the fine particle coal charge flue-gas temperature reduce gradually and the dual function of cross section flaring under, back-mixing participates in the cycle heat exchange damping, and because wall effect is got back to coal damping machine damping coal export, finally outlet is flowed out thus; Have only that small part is thin, microparticle fluidization coal charge continues to rise with air-flow, complete enter the secondary settlement disengaging zone that pusher coal damping machine top is vibrated in boiling;

4) enter in the coal charge of secondary settlement disengaging zone, most of coal charge is captured when process is streamed collision type gas-solid separator and air outlet collision type gas-solid separator, and because wall effect is got back to coal damping machine damping coal export, finally outlet is flowed out thus, has only that a small part is thin, the microparticle coal charge is with the air flow stream damping machine that produces coal.

In the described step 4), small part is thin, the microparticle coal charge produces coal behind the damping machine with air flow stream, enters particulate and reclaims the unit; Particulate reclaims the unit and comprises fines segregation device and particulate retrieving arrangement, and the fines segregation device adopts gravity separator or tornado dust collector, but collection cut size is greater than the fine particle coal charge of 0.3mm; The particulate retrieving arrangement adopts sack cleaner, can further collect less than the fine particle coal charge of 0.3mm particle diameter.

Described particulate retrieving arrangement top is communicated with smoke exhaust fan by connecting tube, and smoke exhaust fan is connected with chimney; Chimney also is connected with the induced draft fan outlet by connecting tube.

Described secondary air entrance is communicated with the induced draft fan outlet by connecting tube.

When the feed coal water capacity changes, by regulating recirculating air entrance automatic regulating valve door aperture and secondary air entrance automatic regulating valve door aperture, recirculation blower being carried out the speed control by frequency variation measure, regulate the flue-gas temperature that enters the coal damping machine, guarantee the needed calorific value of feed coal damping and humidity.

Compared with prior art, the invention has the beneficial effects as follows:

1) energy-saving effect is more obvious;

Adopting coke oven flue gas is thermal source, and fully recovering waste heat carries out the coal damping, can save a large amount of high potentials, and energy-saving effect is more obvious.

2) heat and mass efficient height, damping is effective;

Coal charge particle diameter difference, the specific surface area difference, its total moisture content also is inequality.The total moisture content of coarse particles coal charge is lower, and the total moisture content of fine particle coal charge is higher.In order to realize the even damping this purpose of coal charge, the pusher coal damping machine of full boiling vibration takes full advantage of material inefficient characteristics of heat and mass under heat and mass efficient height, fixed bed and the fluidized state of partly seething with excitement under the full boiling fluidized state, make the coal charge of different-grain diameter in the coal damping machine, be in different motions and damping state, realize efficient, the evenly damping of coal charge.

3) system's operating safety, continuous, stable;

The pusher coal damping machine of full boiling vibration adopts once, the secondary blast mode is blown, namely once coal charge seethe with excitement full fluidisation and damping needs are only satisfied in air-supply, secondary blast replenishes the required heat of fine particle coal charge damping and prevents the tail flue gas dewfall, can suitably reduce vibration distribution plate sectional dimension, guarantee that grid distributor rapping power is even, prevent dead bed, simultaneously by regulating the amplitude of vibration distribution plate, can prevent that feed coal from piling up at the vibration distribution plate, be conducive to coal charge fluidisation and conveying; The pusher coal moisture control process system of full boiling vibration also is provided with safety detection protection facility and accidental state nitrogen charging device.The use of above measure can guarantee the pusher coal moisture control process system safety of full boiling vibration, continuous, steady running.

4) floor space is little, reduced investment;

Because the pusher coal damping machine sectional dimension of full boiling vibration depends on the operation fluidizing velocity, so adopt once, the secondary blast mode can suitably reduce coal damping machine sectional dimension, compact equipment, damping station arrangement form and conventional dedusting terrestrial station arrangement form approach, floor space is little, and facility investment is low.

5) working cost is low;

Pulverizing earlier, back damping coal technology do not need coal charge is carried out classification.The coal charge of different-grain diameter is in different motions and damping state in the coal damping machine, satisfy the needs of efficient, even damping, and flow out by coal damping machine damping coal export through the most of damping coal after the damping, can reduce coal damping machine running resistance, reduce systematic running cost usefulness, energy-saving effect is remarkable.

Description of drawings

Fig. 1 is the schema of the pusher coal humidifying technology of full boiling vibration;

Fig. 2 is the structural front view of the pusher coal damping machine of full boiling vibration;

Fig. 3 is the structure side view of the pusher coal damping machine of full boiling vibration.

Numerals 1: - raw coal buffer holder 2 - raw coal dosing device 3 - Confined feeding device 4 - air distribution device 5 - Fan 6 - automatic adjustment of primary air inlet valve 7 - automatically adjust the secondary air inlet valve 8 - circulating blower 9 - full boil vibration-propelled coal moisture machine 10 - fine separation device 11 - fine recovery 12 - closed cinder device 13 - tune wet coal conveyor means 14 - exhaust fan 15 - closed belt conveyor machine 16 - coal moisture machine spouts sealed discharge device 17 - circulating air inlet valve 18 is automatically adjusted - safety Testing protection facility 19.In - accident condition nitrogen means 20 - chimney 21 - primary air inlet 22 - soft link under paragraph 23 - vibration distribution plate 24 - the flexible connection piece 25 - raw coal inlet 26 - once the humidity separation zone 27 - second humidity separation zone 28 - flow around percussive solid separator vessel 29 - outlet percussive solid separator 30 - airflow outlet 31 - secondary air inlet 32 ??- tune wet coal port 33 - the vibration motor

Embodiment

Below in conjunction with accompanying drawing to the present invention seethe with excitement full the vibration pusher coal humidifying technology be described in further detail:

See Fig. 2, Fig. 3, this process using is seethed with excitement entirely and is vibrated pusher coal damping machine as fluidisation, the damping equipment of coal charge, utilize the principle of work of vibrated fluidized bed, the coal charge that makes different-grain diameter is in different motions and damping state in the pusher coal damping machine of full boiling vibration: small part macrobead coal charge is attached to and forms fixed bed above the coal damping machine vibration distribution plate or form lower semi-fluidizing fluid-bed of fluid height, under the effect of vibration distribution plate rapping power, flowing to coal damping machine damping coal export 32 directions in damping limit, limit, is finally flowed out by damping coal export 32; Most of feed coal is in full boiling fluidized state in the coal damping machine, carry out the back-mixing damping a damping disengaging zone 26, and 27 streamed collision type gas-solid separator 28 and air outlet collision type gas-solid separator 29 is separated from air-flow in secondary damping disengaging zone, under the effect of wall effect, get back to coal damping machine damping coal export 32, finally flowed out by damping coal export 32; Have only that a small part is thin, the microparticle coal charge forms the gas delivery bed, with the air flow stream damping machine that produces coal, and reclaimed the unit by particulate and further reclaim.

This process using coke oven flue waste gas is as fluidizing medium and heating agent, coke oven flue waste gas branch secondary air enters full boiling and vibrates pusher coal damping machine: a wind is used for fluidisation and the damping of feed coal, secondary air is used for the further damping of fine particle coal charge, prevents the tail flue gas dewfall simultaneously.Coke oven flue gas branch secondary air is sent into the coal damping machine, can suitably reduce vibration distribution plate sectional dimension, guarantees that vibration distribution plate rapping power is even, prevent dead bed, is convenient to coal damping system simultaneously and moves adjusting with the difference of feed coal humidity.

See Fig. 1, Fig. 2, Fig. 3, the pusher coal humidifying technology of full boiling vibration, concrete steps are as follows:

1) coke oven flue gas is pumped to the damping station under the effect of induced draft fan 5, behind flow distributor 4 adjusting air-flows, is transported to coal damping machine 9 vibration distribution plates 23 bottoms by a wind entrance 21; Coal charge in the feed coal surge bunker 1 evenly is delivered to coal damping machine 9 feed coal entrances 25 by feed coal metering device 2 and airtight feeding device 3, enters into the top of vibration distribution plate 23.The feed coal that enters the coal damping machine contacts with a wind stack gas on vibration distribution plate 23 tops.

The coal charge of different-grain diameter is in different kinestates in the pusher coal damping machine 9 of full boiling vibration: the especially big particle coal charge of small part is attached to and forms fixed bed above the vibration distribution plate 23, under the effect of vibration distribution plate 23 rapping power, flowing to damping coal export 32 in damping limit, coal charge limit, is finally flowed out by damping coal export 32.In this part especially big particle coal charge, some is the granule that is formed because water is bonding by a plurality of small-particle coal grains.These vibrate under the effect of rapping power in the process that advances, will be loose by shaking change into can fluidisation the free particle of small grain size.Most of coal charges are in full boiling fluidized state under the effect of a wind stack gas, full the fluidized coal charge that seethes with excitement enters the damping disengaging zone 26 that pusher coal damping machine 9 middle parts are vibrated in full boiling with air-flow.

In the fluidisation section of the pusher coal damping machine of full boiling vibration bottom, the water capacity of macrobead coal charge is lower, utilizes the lower characteristics of fixed bed gas-particle heat transfer mass-transfer efficiency to carry out damping, the super-dry situation of coarse particles coal charge can not occur, can realize the even damping of coal.

2) above-mentioned full boiling fluidization coal charge enters a damping disengaging zone 26 at coal damping machine 9 middle parts, and this district belongs to concentrated phase damping, disengaging zone, the heat and mass power maximum of this zone coal charge and hot flue gas, and the damping of feed coal zone is substantially thus finished.Enter in the full boiling fluidization coal charge of 26 bottoms, a damping disengaging zone, the macrobead coal charge is under inertia effect, return fluidized-bed and participate in the cycle heat exchange damping, according to fluidization property, the damping coal progressively flows to damping coal export 32, finally discharged by damping coal export 32, the fluidization coal charge continues to rise with air-flow entirely other particle diameter seethes with excitement, and enters the top of a damping disengaging zone 26.In full boiling fluidization coal charge uphill process, wind effluent gas temperature reduces gradually with the carrying out of heat and mass between the gas-solid, and should the zone top cross-section flaring occur, so coal damping machine operation fluidizing velocity reduces under the effect of these two factors gradually.In the fluidization, when the fine particle coal charge runs to lower regional of 26 tops, damping disengaging zone operations fluidizing velocity with air-flow, back-mixing participates in the cycle heat exchange damping under inertia effect, and under the wall effect effect, finally get back to coal damping machine damping coal export 32, and flow out thus, have only that small part is thin, the microparticle coal charge continues to rise with air-flow, complete enter the secondary damping disengaging zone 27 that pusher coal damping machine 9 tops are vibrated in boiling.

Coal charge particle diameter difference, the time that the height that is held up by wind stack gas and coal charge stop in the coal damping machine also has nothing in common with each other.The coal charge particle diameter is more little, and its total moisture content is more high, and required heat-exchange time is also more long.Utilize the high characteristics of full boiling fluidized state heat and mass efficient, the different characteristic of coal charge terminal settling velocity according to different-grain diameter, by regulating coal damping machine operation fluidizing velocity, the damping time of coal charge in the coal damping machine of control different-grain diameter, can realize even, the highly effective humidity conditioning of coal charge, prevent the super-dry of coal charge.

3) secondary damping disengaging zone 27 belongs to the dilute phase disengaging zone, and secondary air is regional secondary air entrance 31 inputs thus.Mainly finish carefully in this zone, further damping and the further separation of damping coal from air-flow of microparticle coal charge.It is all smaller to enter this regional damping coal fineness, and the particle diameter of most of coal charge only depends on reduction operation fluidizing velocity to be difficult to coal charge high efficiency separation from air-flow is come out below 0.5mm.Establish in the bottom in this zone and to stream collision type gas-solid separator 28, when the fluidization coal charge passes this separator, most thin, microparticle coal charge is caught by this separator in the air-flow, get back to a damping disengaging zone and participate in cycle heat exchange, and it is final under the effect of wall effect, get back to coal damping machine damping coal export 32, finally outlet is flowed out thus.Do not streamed the fluidization coal charge that collision type gas-solid separator 28 catches and then continue to rise with air-flow, flow to boiling and vibrate pusher coal damping machine air stream outlet 30 entirely.30 places also are provided with collision type gas-solid separator 29 at air stream outlet, further capture and are not streamed the fluidization coal charge that collision type gas-solid separator 28 is caught.Be knocked the coal charge of formula gas-solid separator 29 captures under the effect of wall effect; directly get back to coal damping machine damping coal export 32; finally outlet is flowed out thus, has only a small part fine particle coal charge to enter follow-up particulate and reclaim the unit with the air flow stream damping machine that produces coal.

After a wind stack gas was carried out the efficient heat transfer mass transfer with full boiling fluidization coal charge during through a damping disengaging zone, smoke moisture was near state of saturation.The secondary air input point is located at secondary damping disengaging zone, can prevents the tail flue gas dewfall, also can avoid the super-dry of fine particle coal charge simultaneously.

4) particulate recovery unit comprises fines segregation device 10 and particulate retrieving arrangement 11, and fines segregation device 10 is taken on by gravity separator or tornado dust collector, but collection cut size is greater than the fine particle coal charge of 0.3mm; Particulate retrieving arrangement 11 is taken on by sack cleaner, can further collect less than the fine particle coal charge of 0.3mm particle diameter; The coal dust that fines segregation device 10 and particulate retrieving arrangement 11 are collected is carried by airtight ash-discharging device 12 and damping coal e Foerderanlage 13.

The coal charge that the pusher coal damping machine damping coal export 32 of full boiling vibration flows out drains into airtight endless belt conveyor 15 through airtight dumping device 16; and send into mixing machine with fines segregation device 10 and particulate retrieving arrangement 11 collected fine particle coal charges and fully mix, make into stove moisture content of coal and epigranular, stable.Be delivered to the coal tower through the damping coal that mixes by the technology belt, be used for coking.

After microparticle coal charge in the air-flow reclaimed through particulate retrieving arrangement 11, dust content was lower than 20mg/m 3Stack gas tail gas under the effect of smoke exhaust fan 14, drain into outdoor by chimney.

Induced draft fan 5, recirculation blower 8 and smoke exhaust fan 14 all have the speed control by frequency variation function, by blower fan is carried out speed control by frequency variation, and regulate induced draft fan entrance automatic regulating valve door 6, secondary air entrance automatic regulating valve door 7, both can guarantee the needed negative pressure value of coke oven ordinary production, also can guarantee the full boiling pusher needed exhaust gas volumn of coal damping machine 9 works better of vibration and force value.

When feed coal humidity is lower than set(ting)value, by regulating recirculating air entrance automatic regulating valve door 17 apertures, recirculation blower being carried out speed control by frequency variation, regulate secondary air entrance automatic regulating valve door 7 apertures, guaranteeing that the flue gas calorific value that enters the coal damping machine satisfies under the situation of coal damping institute heat requirement, guarantee that the full boiling pusher coal damping machine 9 operating mode flows of vibration and operation fluidizing velocity remain unchanged, with the feed coal that the adapts to different in moisture different demands to the amount of drying.

The coal charge supply unit of this technology is closed structure, is used for the conveying of the damping coal of feed coal and size fractionated, prevents that outside air from infiltrating the coal humidifying technology by passing in and out the coal charge mouth, causes the potential safety hazard of system.

This technology is provided with security protection unit, is made up of safety detection protection facility 18, accidental state nitrogen charging device 19.Safety detection protection facility 18 comprises: fines segregation device 10 and particulate retrieving arrangement 11 grey storehouse coal charge temperature comparison and detection facilities; Fines segregation device 10 and particulate retrieving arrangement 11 supporting explosion venting devices; Particulate retrieving arrangement 11 grey storehouses are provided with anti-swollen materials device; The pusher coal damping machine 9 of full boiling vibration, fines segregation device 10, particulate retrieving arrangement 11 and connecting tube have the heat tracing measure; Fines segregation device 10 and particulate retrieving arrangement 11 grey storehouses are provided with the insulation heating system.Security protection unit is established the insulation heating facility can prevent the tail flue gas dewfall, thereby prevents owing to coal charge is discharged the not smooth oxidizing reaction that occurs.When automatic checkout facility records grey storehouse coal charge temperature and is higher than flue-gas temperature; system can start accidental state nitrogen charging device 18 automatically; system carries out nitrogen filled protection to the coal damping; start the anti-swollen materials device in particulate retrieving arrangement 11 grey storehouses simultaneously; continuous operation by airtight ash-discharging device 12 and damping coal e Foerderanlage 13; the coal charge that oxidizing reaction occurs is in time discharged the damping system, guarantee the safe operation of coal humidifying technology.

Claims (8)

1. pusher coal humidifying technology is vibrated in full boiling, it is characterized in that, this technology is thermal source with coke oven flue waste gas, adopt the coal damping machine as fluidisation, the damping equipment of coal charge, according to feed coal heat and mass efficient height under the full boiling state, under fixed bed and the fluidized state of partly seething with excitement the inefficient characteristics of heat and mass, utilize the principle of work of vibrated fluidized bed, the back coal charge carries out evenly to pulverizing, highly effective humidity conditioning; Coke oven flue waste gas branch secondary air enters the coal damping machine, and a wind is used for fluidisation and the damping of feed coal, further damping thin, the microparticle coal charge that secondary air is used for, and prevent the tail flue gas dewfall, concrete steps are as follows:
1) described coal damping machine involving vibrations grid distributor, damping disengaging zone, stream collision type gas-solid separator, secondary damping disengaging zone, wind entrance, secondary air entrance, feed coal entrance, damping coal export, air stream outlet, one time the wind entrance is positioned at vibration distribution plate bottom, and vibration distribution plate upper area is a damping disengaging zone; Described vibration distribution plate is the vibratory liquefaction bed structure that is obliquely installed, and the feed coal entrance is positioned on the coal damping machine sidewall of vibration distribution plate hight end, and the damping coal export is positioned on the coal damping machine sidewall of vibration distribution plate low side; Top, a damping disengaging zone is provided with streams the collision type gas-solid separator, and streaming collision type gas-solid separator top is secondary damping disengaging zone; The secondary air entrance is positioned at bottom, secondary damping disengaging zone, and air stream outlet is arranged at coal damping machine top; Air flow outlet is provided with air outlet collision type gas-solid separator;
2) coke oven flue gas is delivered to coal damping machine vibration distribution plate bottom under the induced draft fan effect, and feed coal enters coal damping machine vibration distribution plate top by the feed coal entrance; Feed coal contacts with a wind stack gas in the coal damping machine, finishes coal charge fluidisation, granule diffusing, the macrobead damping coal discharging of shaking; Most of coal charge is under the effect of a wind stack gas, be in full boiling fluidized state, full the boiling fluidized material that blows afloat enters coal damping machine middle part with air-flow, small part macrobead coal charge is under the effect of vibration distribution plate rapping power, damping on one side, to damping coal export direction advance on one side;
3) fluidized material that seethes with excitement entirely enters the damping disengaging zone at coal damping machine middle part, enter the macrobead coal charge of a damping disengaging zone under inertia effect, return vibrated fluidized bed and participate in the cycle heat exchange damping, and progressively flow to the damping coal export, finally discharged by the damping coal export; In the fine particle coal charge flue-gas temperature reduce gradually and the dual function of cross section flaring under, back-mixing participates in the cycle heat exchange damping, and because wall effect is got back to coal damping machine damping coal export, finally outlet is flowed out thus; Have only that small part is thin, microparticle fluidization coal charge continues to rise with air-flow, complete enter the secondary settlement disengaging zone that pusher coal damping machine top is vibrated in boiling;
4) enter the coal charge of secondary settlement disengaging zone, when streaming collision type gas-solid separator and air outlet collision type gas-solid separator, process is captured, and because wall effect is got back to coal damping machine damping coal export, finally outlet is flowed out thus, has only that a small part is thin, the microparticle coal charge is with the air flow stream damping machine that produces coal.
2. pusher coal humidifying technology is vibrated in full boiling according to claim 1, it is characterized in that, in the described step 4), small part is thin, the microparticle coal charge produces coal behind the damping machine with air flow stream, enters particulate and reclaims the unit; Particulate reclaims the unit and comprises fines segregation device and particulate retrieving arrangement, and the fines segregation device adopts gravity separator or tornado dust collector, but collection cut size is greater than the fine particle coal charge of 0.3mm; The particulate retrieving arrangement adopts sack cleaner, can further collect less than the fine particle coal charge of 0.3mm particle diameter.
3. pusher coal humidifying technology is vibrated in full boiling according to claim 2, it is characterized in that, described particulate retrieving arrangement top is communicated with smoke exhaust fan by connecting tube, and smoke exhaust fan is connected with chimney; Chimney also is connected with the induced draft fan outlet by connecting tube.
4. pusher coal humidifying technology is vibrated in full boiling according to claim 1 and 2, it is characterized in that, described secondary air entrance is communicated with the induced draft fan outlet by connecting tube.
5. pusher coal humidifying technology is vibrated in full boiling according to claim 1 and 2, it is characterized in that, when the feed coal water capacity changes, by regulating recirculating air entrance automatic regulating valve door aperture and secondary air entrance automatic regulating valve door aperture, recirculation blower being carried out the speed control by frequency variation measure, regulate the flue-gas temperature that enters the coal damping machine, guarantee the needed calorific value of feed coal damping and humidity.
6. pusher coal humidifying technology is vibrated in full boiling according to claim 2, it is characterized in that, described particulate retrieving arrangement bottom is provided with safety detection protector and accidental state nitrogen charging device.
7. pusher coal humidifying technology is vibrated in full boiling according to claim 2, it is characterized in that, described fines segregation device and particulate retrieving arrangement ash storehouse are provided with heating and heat-insulating device.
8. pusher coal humidifying technology is vibrated in full boiling according to claim 2, it is characterized in that, described fines segregation device and particulate retrieving arrangement be supporting explosion venting device.
CN2011100842171A 2011-04-02 2011-04-02 Full-boiling vibration propelled coal moisture control process CN102304376B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100842171A CN102304376B (en) 2011-04-02 2011-04-02 Full-boiling vibration propelled coal moisture control process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100842171A CN102304376B (en) 2011-04-02 2011-04-02 Full-boiling vibration propelled coal moisture control process

Publications (2)

Publication Number Publication Date
CN102304376A CN102304376A (en) 2012-01-04
CN102304376B true CN102304376B (en) 2013-08-07

Family

ID=45378296

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100842171A CN102304376B (en) 2011-04-02 2011-04-02 Full-boiling vibration propelled coal moisture control process

Country Status (1)

Country Link
CN (1) CN102304376B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1167017A (en) * 1996-04-18 1997-12-10 川崎重工业株式会社 Fluid-bed separator
CN1291920A (en) * 1998-10-27 2001-04-18 川崎重工业株式会社 Fluidized bed-carrying drying classifier
CN101709913A (en) * 2009-12-29 2010-05-19 长沙通发高新技术开发有限公司 Full-boiling cyclone fluidized bed damping machine and new damping technology
CN101936648A (en) * 2010-09-26 2011-01-05 中冶焦耐(大连)工程技术有限公司 Humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of coke furnace
CN101974344A (en) * 2010-11-12 2011-02-16 中冶焦耐(大连)工程技术有限公司 Drying process for humidifying coals by using coke oven flue gas and device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2825734B2 (en) * 1993-06-29 1998-11-18 新日本製鐵株式会社 Control device for coal drying / classifying device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1167017A (en) * 1996-04-18 1997-12-10 川崎重工业株式会社 Fluid-bed separator
CN1291920A (en) * 1998-10-27 2001-04-18 川崎重工业株式会社 Fluidized bed-carrying drying classifier
CN101709913A (en) * 2009-12-29 2010-05-19 长沙通发高新技术开发有限公司 Full-boiling cyclone fluidized bed damping machine and new damping technology
CN101936648A (en) * 2010-09-26 2011-01-05 中冶焦耐(大连)工程技术有限公司 Humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of coke furnace
CN101974344A (en) * 2010-11-12 2011-02-16 中冶焦耐(大连)工程技术有限公司 Drying process for humidifying coals by using coke oven flue gas and device

Also Published As

Publication number Publication date
CN102304376A (en) 2012-01-04

Similar Documents

Publication Publication Date Title
CN101294765B (en) Low rank coal high temperature flue gas drying method and device
CN101665845B (en) Liquid blast furnace slag granulation method and device thereof
CN103759546B (en) Calcium carbide furnace purification ash back-to-furnace combustion system
CN101705131B (en) Raw coal upgrading device and method with combination of drying and dry separation
CN203116491U (en) Lignite water take-out lignite efficient burning system
US8651282B2 (en) Apparatus and method of separating and concentrating organic and/or non-organic material
US9964357B2 (en) Drying and separation integrated machine for vibrating fluidized bed
JP2011080746A (en) Fluidized bed drying apparatus
CN203687563U (en) Pneumatic drying device for material breaking
CN101705132B (en) Drying and dry separation combination device as well as dry separation and drying combination device
CN201897365U (en) Vibration fluidized bed microwave drying system for vapor compression heat energy recirculation
CN203672164U (en) Purified ash returning combustion system of calcium carbide furnace
CN101440323B (en) Drying and moulding integrated process for low rank coal
CN101870897B (en) Process for carrying out strengthening circulation, stage grinding and quality improvement on lignite by utilizing superheated steam and system thereof
CN202725512U (en) Full-grain high-efficiency dry coal preparation system for power coal separation
JP6047065B2 (en) Coal humidity conditioning method with steam tube rotary drying, sorting and granulation integrated, and its dedicated equipment
CN105316476A (en) Preparation method for producing strong-magnetism magnetite through refractory weak-magnetism oxidized iron ore
CN103756712A (en) Biomass quick cracking device based on internal-external circulation spouted fluidized bed
CN1237152C (en) Powdered coal fluidized bed gasification method and gasification furnace
CN202008279U (en) Material drying tower, material drying system and coking coal humidifying system
CN104759203B (en) A kind of fluidized-bed process of directly trapping mineralising carbon dioxide in flue gas and system
CN101402019A (en) Flue gas desulfurization technique of return current circulating fluidized bed in flow equalizing field
CN101063059A (en) Moving iris type fluidized bed
CN101525545A (en) Industrial continuous agricultural and forestry biomass fast pyrogenation oil refining method and device thereof
CN101088980B (en) Two-stage gas flow-fluidized bed drying process and apparatus with nitogen circulated adipic acid and overheated steam

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model