CN102425931A - Method and device for diverting and distributing flue gas in gas-material separated manner - Google Patents
Method and device for diverting and distributing flue gas in gas-material separated manner Download PDFInfo
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- CN102425931A CN102425931A CN201110324311XA CN201110324311A CN102425931A CN 102425931 A CN102425931 A CN 102425931A CN 201110324311X A CN201110324311X A CN 201110324311XA CN 201110324311 A CN201110324311 A CN 201110324311A CN 102425931 A CN102425931 A CN 102425931A
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Abstract
The invention relates to a method and device for diverting and distributing flue gas in a gas-material separated manner. The flue gas is diverted to a flue gas conveying section by arranging a flue gas diverting plate at a flue gas inlet tube, and a low-velocity operation area is formed at the joint part of the flue gas conveying section and a particle coal collecting cabin so that particle materials are separated and subsided from gas, that is to say, under the double actions of low velocity of air flow and boundary effect, the particle coal entering into the area passes through the area and drops down to the bottom of the particle coal collecting cabin to be gathered; the flue gas outlet tube is of a draught distributing chamber structure and goes along a fluidizing bed coal inlet/outlet running route connected with the flue gas outlet tube, and the draught distributing chambers meet various requirements of coal materials with different humidity and different particle diameters on initial fluidizing velocity according to the characteristics that raw material coal has different drying conditions in different sections of the route; the pressure and the flow of flue gas in each draught distributing chamber are regulated by a flue gas distribution regulating valve bank. The method and the device disclosed by the invention have the advantages of distributing air flow uniformly, and separating particle coal mixed into conveying air flow from the air flow rapidly, and discharging the separated coal materials rapidly through a closed ash discharging device.
Description
Technical field
The present invention relates to a kind of gas material divergence type flue gas flow guide distribution method and device; Be mainly used in the fluid bed is in the drying equipment coal moisture control process system; Be used to realize to the dry even distribution of wet coal charge on the fluid bed with air-flow; Also can the particulate coal that fall after rise in the fluid bed to the flue gas transportation section effectively be separated from air-flow, avoid system fan is caused damage.This device also can be used for other technology that air-flow is distributed with high requirement.
Background technology
With coke oven flue waste gas is the operation principle of the coal conditioning technique general using fluid bed of thermal source, makes hot flue gas and wet feed coal direct contact heat-exchanging in the coal damping machine, and coal charge is carried out drying.The coal damping system that with the fluid bed is the coal drying equipment has following characteristics:
1, coal damping machine processing feed coal amount is bigger, and single device disposal ability maximum can reach 350t/h;
2, the feed coal water capacity is bigger, up to 14%.The used heating agent of coal damping is a coke oven flue waste gas, about 210 ℃～230 ℃ of coke oven chimney root flue-gas temperature, and after long distances, the stack gases temperature that is used for the coal damping is generally 180 ℃～200 ℃.Because heat medium temperature is low relatively, so it is bigger to remove the required flue tolerance of the moisture content of coal of unit mass;
3, the coal charge particle diameter is different, and water capacity is different, and its operation fluidizing velocity also has nothing in common with each other.For the coal charge that satisfies different-grain diameter all can reach the purpose of even damping in fluid bed, need certain operation fluidizing velocity, this operation fluidisation is not too high, so the fluid bed sectional area ratio is bigger;
4, fluid bed is distributed with higher requirement to air-flow.Along the direct of travel of coal charge turnover fluid bed, the humidity of feed coal has greatly changed along with the carrying out of damping, and the required minimum fluidizing velocity of different travel segment coal charges also has nothing in common with each other;
5, flue gas and coal charge direct contact heat-exchanging in fluid bed; When flue gas operation fluidizing velocity is lower than the terminal sinking speed of some particle grade coal charge; These coal charges can Returning flow distribution grids surface, and some fine grained coal charge is under the effect of wall effect, also can Returning flow distribution grid surface.In these coal charges, there are some coal charges can pass airflow-distribution board and get into air-flow transportation section, fluid bed bottom.Because air-flow transportation section, bottom is connected with the blower fan outlet, the existence of these particle coal charges certainly will cause potential safety hazard to fan operation.
The field distribution of fluid bed gas is uneven, causes fluid bed channel to occur easily, rises phenomenon such as stream, causes fluid bed dead bed or " piston flow " to occur, makes fluid bed can't work or influence the coal drying effect, influences service life of equipment.
Summary of the invention
The purpose of this invention is to provide a kind of gas material divergence type flue gas flow guide distribution method and device; This method and device not only can realize being uniformly distributed with air-flow; Can also the particle coal charge of sneaking in the delivery air be effectively separated from air-flow; Avoid system fan is caused damage, isolated particle coal charge is discharged through airtight ash discharge equipment.
For realizing above-mentioned purpose, the present invention realizes through following technical scheme:
A kind of gas material divergence type flue gas flow guide distribution method; The place is provided with smoke deflector at the smoke inlet pipe; The blower fan exit flow is carried out water conservancy diversion, and the air-flow of process smoke deflector gets into the steady air flow section through the flue gas transportation section, behind steady air flow section steady air flow, counterpressure; Get into each separating chamber in the flue gas dispensing section, the pressure of each separating chamber flue gas, flow distribute the control valve group to regulate through flue gas; The setting of deflector forms the low-speed handing district in flue gas transportation section and particulate coal collecting bin junction, can realize particulate material in this zone from gas separate and subside; Pass on a small quantity the feed coal that the fluidized bed airflow distribution grid moves downward in the fluid bed and fall into the flue gas transportation section through each separating chamber of smoke outlet tube; Get into this regional particulate coal under the double action of air-flow low speed and wall effect; Can pass this zone and fall into the particulate coal collecting bin, assemble in particulate coal collecting bin bottom.
Gas material divergence type flue gas flow guide distribution device; This device comprises flue gas diversion section, steady air flow section, flue gas dispensing section and particulate coal collection section; The flue gas diversion section comprises smoke deflector, flue gas transportation section; Smoke deflector is arranged on smoke inlet pipe place, and smoke deflector is along the setting that is inclined upwardly of flow of flue gas direction; The particulate coal collection section is a grey storehouse formula structure, and the particulate coal collecting bin is positioned at the bottom of device; The top of particulate coal collection section is flue gas transportation section and steady air flow section, and the steady air flow section is provided with the flase floor of a plurality of steady air flows, counterpressure; Steady air flow section top is the flue gas dispensing section, and the flue gas dispensing section is provided with a plurality of separating chambers, and each separating chamber is equipped with the flue gas of regulating each separating chamber pressure, flow and distributes the control valve group.
Described flue gas distributes the control valve group to be made up of valve plate, valve body driving shaft, valve body driven shaft, crank; Valve body driving shaft and valve body driven shaft are occlusion structure; But the crank that valve body driving shaft one end is provided with motorized motions or manually controls, valve plate is the opposite opened structure, is fixed on the valve body driven shaft.
Described flue gas dispensing section is provided with flue gas flow and pressure measuring unit.
Described particulate coal collection section is provided with upper limit level-sensing device and lower limit level-sensing device, the upper and lower spacing signal of upper limit level-sensing device and lower limit level-sensing device and corresponding airtight ash discharge equipment interlocking.
Compared with prior art, the invention has the beneficial effects as follows:
1) the smoke inlet place is provided with smoke deflector, can carry out water conservancy diversion to smoke inlet place air-flow; Get into flue gas transportation section and steady air flow section through the flue gas behind the water conservancy diversion, in the steady air flow section, establish flase floor, steady air flow, counterpressure;
2) by coal charge from the enter the mouth direct of travel of outlet of fluid bed, according to the coal charge degree of drying separating chamber is set, simultaneously air quantity and pressure-regulating device are set at each separating chamber.Through these measures, can satisfy the demands of different of different humidity coal charge to minimum fluidizing velocity, realize even, the highly effective drying damping of coal charge in fluid bed;
3) through the guide functions of smoke deflector, air-flow moves upward; There is a few part particle coal charge to pass the fluidized bed airflow distribution grid; Fall back to the flue gas transportation section through gas material divergence type flue gas flow guide distribution device distribution of air flow section, steady air flow section, because the junction of flue gas transportation section and particulate coal collecting bin is the low-speed handing district, in this zone; The particle coal charge is under the gravity effect; High efficiency separation from flue gas, and be deposited to particulate coal collecting bin bottom, discharge the flue gas transportation section through airtight device for discharging; Effectively avoid particle coal charge convection current bed blower fan to work the mischief, eliminate safe hidden trouble.
4) establish flue gas flow and pressure measuring unit at the flue gas dispensing section; Flue gas flow, pressure data through scope; Can make things convenient for, regulate timely each separating chamber flue gas and distribute control valve group valve opening; Make the working condition pressure and the flue gas flow of each separating chamber satisfy the fluid bed need of work, improve the equipment operating efficiency;
5) establish the upper limit, lower limit level-sensing device at the particulate coal collecting bin; When upper limit level-sensing device sends material level upper limit alarm signal; Interlocking starts particulate coal and exports the ash discharge of airtight ash discharge equipment, when sending lower limit material level alarm signal, and the airtight ash discharge equipment of interlocking close; Can shorten the ash discharge operation hours, prolong service life of equipment.
Description of drawings
Fig. 1 is a structural front view of the present invention.
Fig. 2 is a structure side view of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described:
See Fig. 1, Fig. 2; Gas material divergence type flue gas flow guide distribution method and device; Be mainly used in the coal moisture control process system; Be used to realize also can the particulate coal that from fluid bed, falls after rise to the flue gas transportation section effectively be separated from air-flow, avoid system fan is caused damage the dry even distribution of wet coal charge on the fluid bed with air-flow.This device also can be used for other process system is distributed with high requirement to air-flow technology.
When in the coal moisture control process system, moving, smoke inlet pipe 4 is connected with fan outlet tube, and smoke outlet tube 5 is connected with fluid bed smoke inlet pipe, and particulate coal outlet 10 is connected with airtight discharge device.
A kind of gas material divergence type flue gas flow guide distribution method through establishing smoke deflector at smoke inlet pipe place, is carried out water conservancy diversion to the blower fan exit flow, and through steady air flow section steady air flow, counterpressure; Through deflector is set, can form the low-speed handing district in flue gas transportation section and particulate coal collecting bin junction, realize particulate material separate and subside from gas.Pass on a small quantity the feed coal that the fluidized bed airflow distribution grid moves downward in the fluid bed and fall into the flue gas transportation section through each separating chamber of smoke outlet tube; Get into this regional particulate coal under the double action of air-flow low speed and wall effect; Can pass this zone and fall into the particulate coal collecting bin, assemble in particulate coal collecting bin bottom; Smoke outlet tube is the separating chamber structure; Along the fluid bed turnover coal charge course that is connected with smoke outlet tube; In the different section of this route drying regime different features, separating chamber satisfies the different needs of the coal charge of different humidity, different-grain diameter to minimum fluidizing velocity based on feed coal; The pressure of each separating chamber flue gas, flow distribute the control valve group to regulate through flue gas.
Gas material divergence type flue gas flow guide distribution device; Comprise flue gas diversion section, steady air flow section, flue gas dispensing section and particulate coal collection section; The flue gas diversion section comprises smoke deflector 2, flue gas transportation section 7; Smoke deflector 2 is arranged at smoke inlet pipe 4 places, and smoke deflector 2 is along the setting that is inclined upwardly of flow of flue gas direction; The particulate coal collection section is a grey storehouse formula structure, and particulate coal collecting bin 3 is positioned at the bottom of device; The top of particulate coal collection section is flue gas transportation section 7 and steady air flow section 13, and flue gas transportation section 7 is connected with smoke deflector 2 exhanst gas outlet sides and steady air flow section 13, and steady air flow section 13 is provided with the flase floor of a plurality of steady air flows, counterpressure; Steady air flow section 13 tops are flue gas dispensing sections, and the flue gas dispensing section is provided with a plurality of separating chambers, and each separating chamber is equipped with the flue gas of regulating each separating chamber pressure, flow and distributes control valve group 1.
Smoke outlet tube is the separating chamber structure; Along the fluid bed turnover coal charge course that is connected with smoke outlet tube; In the different section of this route drying regime different features, separate air compartment based on feed coal, satisfy the different needs of the coal charge of different humidity, different-grain diameter minimum fluidizing velocity; Distribute control valve group top to establish flue gas flow and piezometry equipment at each separating chamber flue gas,, can in time adjust each separating chamber control valve opening, satisfy each separating chamber different pressures, traffic requirement through observation sensing equipment determination data.
During the equipment operation, the coke oven flue waste gas that exports from blower fan is delivered to smoke inlet pipe 4, after being arranged on smoke deflector 2 water conservancy diversion in the smoke inlet pipe 4, gets into flue gas transportation section 7.Steady air flow section 13 is established at 7 tops, flue gas transportation section, establishes the flase floor structure sheaf in the steady air flow section 13, and behind the flue gas process flue gas transportation section 7 and steady air flow section 13 through smoke deflector 2 water conservancy diversion, air-flow tends towards stability, equilibrium.Air-flow gets into flue gas and distributes control valve group 1 to carry out the flue gas distribution through after stable.Regulate flue gas according to the numerical value of flue gas pressures and flow rate-measuring device 6 mensuration and distribute each the separating chamber control valve opening in the control valve group 1; The pressure of each separating chamber and the coal charge of Flow-rate adjustment to fluid bed different moisture levels and particle diameter are carried out initial fluidisation parameters needed value; And will be delivered to smoke outlet tube 5 through the flue gas that overregulates; And being delivered to fluidized bed airflow distribution grid bottom through smoke outlet tube 5, coal supply materials flow drying equipment uses.There is the feed coal in a small amount of fluid bed to pass the fluidized bed airflow distribution grid, falls into flue gas transportation section 7 through smoke outlet tube 5 each separating chamber.In the flue gas transportation section 7 with particulate coal collecting bin 3 junctions be the low-speed handing district; Get into this regional particulate coal under the double action of air-flow low speed and wall effect; Can pass the zone of silence that this zone falls into particulate coal collecting bin 3 bottoms, and assemble in particulate coal collecting bin 3 bottoms.The coal charge that collect particulate coal collecting bin 3 bottoms reach a certain height; The upper limit level-sensing device 8 that is located at particulate coal collecting bin 3 sidewalls can send upper limit material level alarm signal; Interlocking starts the airtight ash discharge equipment ash discharge that is connected with particulate coal outlet 10 simultaneously; Treat the particle coal charge is drained into down in limited time, lower limit level-sensing device 9 can send alarm signal, simultaneously the airtight ash discharge equipment of interlocking close.
Get into fluid bed along feed coal from inlet to the travel that flows out fluid bed from outlet; According to the different drying regimes of feed coal at this each section of distance; Smoke outlet tube 5 is separated into a plurality of separating chambers; Flue gas distributes the valve of control valve group 1 also to be provided with at each separating chamber, with the coal charge that satisfies different humidity, the different-grain diameter different needs to minimum fluidizing velocity.
Through flue gas transportation section inspection door 11 and particulate coal collecting bin inspection door 12 are set, can maintain easily, overhaul relevant device.
Flue gas distributes each control valve of control valve group 1 to form by the control valve valve plate of splitting 16, and control valve valve plate 16 is fixed on the regulation valve body driven shaft 15, and regulation valve body driving shaft 14 drives 15 actions of regulation valve body driven shaft through the interlock mode.One end of control valve driving shaft 14 is established control valve crank 17, can drive control valve crank 17 through manual or electronic mode, drives 14 operations of regulation valve body driving shaft.
Claims (5)
1. gas material divergence type flue gas flow guide distribution method; It is characterized in that the place is provided with smoke deflector at the smoke inlet pipe, the blower fan exit flow is carried out water conservancy diversion; Air-flow through smoke deflector gets into the steady air flow section through the flue gas transportation section; Behind steady air flow section steady air flow, counterpressure, get into each separating chamber in the flue gas dispensing section, the pressure of each separating chamber flue gas, flow distribute the control valve group to regulate through flue gas; The setting of deflector forms the low-speed handing district in flue gas transportation section and particulate coal collecting bin junction, can realize particulate material in this zone from gas separate and subside; Pass on a small quantity the feed coal that the fluidized bed airflow distribution grid moves downward in the fluid bed and fall into the flue gas transportation section through each separating chamber of smoke outlet tube; Get into this regional particulate coal under the double action of air-flow low speed and wall effect; Can pass this zone and fall into the particulate coal collecting bin, assemble in particulate coal collecting bin bottom.
2. realize a kind of gas material divergence type flue gas flow guide distribution device of the said method of claim 1; It is characterized in that; This device comprises flue gas diversion section, steady air flow section, flue gas dispensing section and particulate coal collection section; The flue gas diversion section comprises smoke deflector, flue gas transportation section, and smoke deflector is arranged at smoke inlet pipe place, and smoke deflector is along the setting that is inclined upwardly of flow of flue gas direction; The particulate coal collection section is a grey storehouse formula structure, and the particulate coal collecting bin is positioned at the bottom of device; The top of particulate coal collection section is flue gas transportation section and steady air flow section, and the flue gas transportation section is connected with smoke deflector and steady air flow section, and the steady air flow section is provided with the flase floor of a plurality of steady air flows, counterpressure; Steady air flow section top is the flue gas dispensing section, and the flue gas dispensing section is provided with a plurality of separating chambers, and each separating chamber is equipped with the flue gas of regulating each separating chamber pressure, flow and distributes the control valve group.
3. gas material divergence type flue gas flow guide distribution device according to claim 2; It is characterized in that; Described flue gas distributes the control valve group to be made up of valve plate, valve body driving shaft, valve body driven shaft, crank, and valve body driving shaft and valve body driven shaft are occlusion structure, but the crank that valve body driving shaft one end is provided with motorized motions or manually controls; Valve plate is the opposite opened structure, is fixed on the valve body driven shaft.
4. according to claim 2 or 3 described gas material divergence type flue gas flow guide distribution devices, it is characterized in that described flue gas dispensing section is provided with flue gas flow and pressure measuring unit.
5. according to claim 2 or 3 described gas material divergence type flue gas flow guide distribution devices; It is characterized in that; Described particulate coal collection section is provided with upper limit level-sensing device and lower limit level-sensing device, the upper and lower spacing signal of upper limit level-sensing device and lower limit level-sensing device and corresponding airtight ash discharge equipment interlocking.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324311.XA CN102425931B (en) | 2011-10-23 | 2011-10-23 | Method and device for diverting and distributing flue gas in gas-material separated manner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110324311.XA CN102425931B (en) | 2011-10-23 | 2011-10-23 | Method and device for diverting and distributing flue gas in gas-material separated manner |
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| CN102425931A true CN102425931A (en) | 2012-04-25 |
| CN102425931B CN102425931B (en) | 2014-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928357A (en) * | 2016-06-20 | 2016-09-07 | 高邑县海侨节能技术有限公司 | Inclined vertical kiln furnace for drying particulate matter |
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| FR2941389A1 (en) * | 2009-01-29 | 2010-07-30 | Fives Fcb | SELECTIVE GRANULOMETRIC SEPARATION DEVICE FOR SOLID PULVERULENT MATERIALS WITH CENTRIFUGAL ACTION AND METHOD OF USING SUCH A DEVICE |
| CN201902583U (en) * | 2010-09-13 | 2011-07-20 | 秦皇岛中青冶金阀门有限公司 | Total enclosed sector blind plate valve |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1751811A (en) * | 2005-08-26 | 2006-03-29 | 杨国华 | Dry type gradation equipment for coal |
| DE102007057220A1 (en) * | 2007-07-25 | 2009-05-28 | Udo Cyrol | Mechanism for actuating dampers, valves and other devices subjected to supply and retention torque |
| CN101726172A (en) * | 2008-10-14 | 2010-06-09 | 石建明 | Drier wind-homogenizing device |
| FR2941389A1 (en) * | 2009-01-29 | 2010-07-30 | Fives Fcb | SELECTIVE GRANULOMETRIC SEPARATION DEVICE FOR SOLID PULVERULENT MATERIALS WITH CENTRIFUGAL ACTION AND METHOD OF USING SUCH A DEVICE |
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| CN105928357A (en) * | 2016-06-20 | 2016-09-07 | 高邑县海侨节能技术有限公司 | Inclined vertical kiln furnace for drying particulate matter |
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