CN1063154A - Multi-function dust remover - Google Patents
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- CN1063154A CN1063154A CN92100412A CN92100412A CN1063154A CN 1063154 A CN1063154 A CN 1063154A CN 92100412 A CN92100412 A CN 92100412A CN 92100412 A CN92100412 A CN 92100412A CN 1063154 A CN1063154 A CN 1063154A
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Abstract
The present invention relates to the UTILIZATION OF VESIDUAL HEAT IN and the dedusting of Industrial Boiler or kiln tail flue gas, form heat pipe energy-saving type twin-stage multi-function dust remover by heat-pipe air preheater, heat pipe economizer, heat preservation hot water tank, jet type dust collector and cyclone centrifugal duster etc.Can improve boiler efficiency 5-10%, the 10-15% that exerts oneself, and efficiency of dust collection＞92%, smoke discharge amount＜150mg/m
3Heat pipe adopts measures such as streamlined not dust stratification fin and two lance doors, has solved the difficult removing problem of easy dust stratification.Deduster adopts low-speed pulse and plane rotation and reduces the cigarette resistance, make the 0.5-35T/H boiler former there is something special down, can install this multi-function dust remover on the spot additional, realized the integrated transformation of medium and small boiler afterbody hot side and deduster.
Description
The present invention relates to the UTILIZATION OF VESIDUAL HEAT IN and the dedusting of Industrial Boiler or metallurgical furnace tail flue gas.
In existing Industrial Boiler, for the efficient that improves boiler with exert oneself, cast iron fin tube type economizer, the heated feed water to utilize waste heat can be set at boiler tail.In order further to improve its efficient and to exert oneself, behind economizer, be provided with the steel pipe air preheater again, the required air of heating flame further to utilize its waste heat.Its traditional process is first heated feed water, back heating air-supply.Few part enterprise is also arranged, used novel heat-pipe air preheater or heat pipe economizer, absorb waste heat, add hot-air or feedwater.In order to eliminate the pollution of boiler smoke to atmosphere and surrounding environment; in the outlet and the flue between the induced-draught fan import of boiler; the deduster of multiple patterns such as normal installing gravity type, inertia-type, wet type, water film type or whirlwind are centrifugal; not only protect environment, also protected induced-draught fan to avoid the wearing and tearing of flue dust.
Though these energy-conserving and environment-protective equipment, can improve boiler efficient, exert oneself and eliminate the pollution of flue dust, in the actual motion of medium and small boiler, also produce many new problems, long-term existence is difficult to solve, and now is described below:
(1) cast iron fin tube type economizer, it is unreliable to supply water, and moves dangerous.
During boiler operatiopn, the economizer tube is subjected to washing away continuously of high-temperature flue gas and heating continuously, but medium and small boiler is interrupted water inlet, so cause the temperature of economizer tube wall, changes with the variation of intaking; When boiler feed water, water flows in pipe, so it is low to add the hot water temperature.When boiler wouldn't be intake, water stopped to flow in pipe, thus add hot water temperature's height, even be vaporized, fetch water next time thereby influence.Or when poor water quality, water is easy to fouling and stops up in pipe.These situations all make feed pump not go up water, the safe operation of serious threat boiler, so that be forced to blowing out and repair.Because the economizer tube wall temperature is sometimes hot and sometimes cold, causes the repeated expansion and shrinkage of pipe, and under the high pressure water outlet of feed pump, cause that very easily the leakage of economizer damages.In addition, economizer piping complexity has inlet channel, bypass duct, circulating line, relief pipeline and blow-off line etc., and all the high-altitude is arranged, operation inconvenience.So this water inlet system and water intake mode are neither safe and reliable, also uneconomical saving.And being easy to sticking ash owing to the tube wall temperature of economizer is low, the fin the economizer tube outside is many and be easy to dust stratification, is difficult to cleaning, and increases the cigarette resistance, increase induced-draught fan power consumption.After dust stratification arrived to a certain degree, influence was ventilated, pressure combustion, burner hearth flame, damage equipment and be forced to a series of vicious circles such as load shedding makes this cast iron gilled tube economizer eventually under the operating condition of intermittently intaking, use approximately about 1 year, just being forced to maintenance, changing or removing need not.
(2) steel tubular air heater, easily dust stratification, perishable.
It belongs to gas one gas type heat exchange, is arranged in again in the flue of economizer back, so the cigarette temperature is low, it is poor to conduct heat, volume big, the consumption steel is many.In addition, air-supply piping complexity, windage are big, and not only air is difficult for heating, and flue gas also is easy to dewfall, obstruction and corrosion, cause boiler positive pressuring combustion, burner hearth flame, damage equipment, even be forced to shutdown maintenance.So not only fail to install additional use at the following boiler of 4T/H, even at the medium-sized boiler of 10-35T/H, the also stifled ash of the serious dewfall of invar tube air preheater fume side, and be forced to shutdown maintenance, even also have to remove and finish.This not only reclaims fume afterheat less and reduces the efficient of boiler and exert oneself, and main is makes combustion conditions can not get improving, and influences boiler operatiopn, influences production of units.Some unit uses the glass-tube regenerative air heater instead for this reason, glass-tube also often takes place fracture and cause and leak out and short circuit, so also influenced promoting the use of of glass-tube air preheater.
(3) former heat-pipe air preheater or heat pipe coal saving tube, easy dust stratification, use is had any problem.
The economizer of former boiler is removed by minority unit, install heat-pipe air preheater or heat pipe economizer additional, but because of the fin that gathers on the heat pipe heat-absorbing section is easy to dust stratification, be difficult to remove and cause problem such as passage obstruction not solve, so also influenced promoting the use of of heat-pipe air preheater or heat pipe economizer.
(4) whirlwind centrifugal dust collector, the cigarette resistance is big, weak effect, soot emissions are difficult to up to standard.
The whirlwind centrifugal dust collector, because of connecting pipe is long, turning is many, and section variation is big, and flue dust enters dedusting body shell at a high speed, so not only cigarette resistance big (800-1200Pa), power consumption is big, and itself also exists wear problem.When boiler load changed, cigarette speed is respective change also, and the resistance of flue dust and centrifugal force change bigger, and when diminishing as boiler load, the cigarette resistance is little, but centrifugal force is also little, and dust removing effects is poor.Otherwise when increasing as boiler load, though centrifugal force also increases, dust removing effects takes a turn for the better, and the cigarette resistance also increases, if the not enough operation under positive pressure that just easily causes of air draught power.So the dust removing effects in the time of can not guaranteeing load variations, soot emissions also are difficult to up to standard.More seriously, some factory management is not tight, and the wearing and tearing of dedusting body shell are not in time repaired yet, thereby influences the ventilation burning of boiler.Extremely other kettleman is afraid of the ash discharge trouble, and opens the ashpit under the deduster, causes separated and grit that collects sucks induced-draught fan once more, continues wearing and tearing induced-draught fan and continuation atmosphere pollution.
(5) deduster such as wet type and water film type pollutes and can not use because of causing new a large amount of water.
Deduster such as wet type and water film type not only needs a large amount of Inlet and outlet waters, the waste precious water resource, and it is with the pollution of flue dust to air, has become the pollution of flue dust to water, and to the pollution of the water cost of refractory reason and Hua Genggao more.This does not meet environmental friendly principle and requirement, so dedusters such as wet type and water film type should stop using and forbid.
(6) design arrangement of back-end surfaces and deduster is all independently carried out and uncorrelated mutually separately.
The design arrangement of existing medium and small boiler back-end surfaces (economizer and air preheater) and deduster all is independently to carry out separately and incoherent mutually, even the place of mutual contradiction is often arranged.As the exhanst gas outlet of 4T/H packaged boiler cast iron gilled tube economizer below, and the cyclone centrifugal duster gas approach that matches with it up, so connection flue between them, changeing two bends, and its section also will change, and this just causes many consumptions man-hour, consumes steel more, accounting for area more and increasing the cigarette resistance increases situations such as induced-draught fan power consumption, rational inadequately really.
The objective of the invention is to design and provide a kind of under former boiler, former factory building and the former situation of sending induced-draught fan, can make up fast-assembling, have concurrently safe, energy-conservation and environmental protection, efficiently, the Multifunction deduster of low-resistance and high-quality, realize boiler tail hot side heat pipeization, improvement and rationalization, and the integrated and fast-assemblingization that boiler tail hot side and deduster are combined into mutually.Improve the security of existing medium and small boiler operation.The economy and the feature of environmental protection.
The present invention is that the deduster cuboid by first half heat exchanger cuboid and Lower Half is formed by connecting.First half heat exchanger cuboid is by parts such as preceding lance door, heat-pipe air preheater, back lance door and heat preservation hot water tanks, pass through inlet flue duct, before and after be cascaded and form, and the heat preservation hot water tank is on the flue of back lance door, and is sidelong the heat part with heat pipe economizer water and is connected as a single entity.Lower Half deduster cuboid is the two-stage dust removal device that is in series by jet type dust collector and cyclone centrifugal duster.Promptly formed have heat pipe hot-blast, heat pipe energy-saving type and twin-stage multi-function dust remover that heat pipe hot water, heat preservation hot water tank and double stage tandem deduster are formed by combining.
According to the actual needs of producing, the present invention also can be designed to the following multi-functional dedusters of regulating as required except that first kind of above-mentioned pattern of design.
Second kind of form, the i.e. first half heat exchanger cuboid that is cascaded by preceding lance door, heat-pipe air preheater, back lance door, be connected with the Lower Half deduster cuboid that is in series by jet type dust collector and cyclone centrifugal duster again, formed the multi-function dust remover of only forming by heat-pipe air preheater and two-stage dust removal device.
The third pattern, the i.e. first half heat exchanger cuboid that is cascaded by fore blow door, heat pipe economizer, back lance door and heat preservation hot water tank, be connected with the Lower Half deduster cuboid that is in series by jet type dust collector and cyclone centrifugal duster again, formed the multi-function dust remover of only forming by heat pipe economizer, heat preservation hot water tank and double stage tandem deduster.
The 4th kind of form, promptly the deduster cuboid of being made up of direct being connected with cyclone centrifugal duster with jet type dust collector of flue forms the multi-function dust remover that the double stage tandem deduster is only arranged.
The first half heat exchanger cuboid is of a size of: long 1-4 rice, wide 0.7-3.5 rice, high 1-4 rice.It can be divided into two parts up and down again.Wherein upper part is the heat release section of heat-pipe air preheater, the heat release section of heat pipe economizer and heat preservation hot water tank, and the heat release section of heat preservation hot water tank and heat pipe economizer water side is connected as a single entity.Wherein lower part is a flue, is provided with the endotherm section of preceding lance door, heat-pipe air preheater, the endotherm section of heat pipe economizer.Parts such as after-blow door and flue gas turning guide plate are formed, and its length is 1-4 rice, wide 0.7-3.5 rice, high 0.5-2 rice.The front and back lance door is by two groups of front and back, and the lance door that the flue of the independent operation separately that second gear is above is separated on the plate washer is formed, and separates on the plate washer to guarantee flue, sufficiently high local velocity is arranged, thereby be in operation, and it is self-cleaning to blow ash.This not only helps the unimpeded of flue, also helps effective heat absorption of heat pipe fin simultaneously.
The arrangement mode of heat pipe is fork row or in-line arrangement in heat-pipe air preheater and the heat pipe economizer, and for the following boiler of 4T/H, the external diameter of heat pipe can be selected 25 millimeters for use, and to 4T/H and above boiler thereof, the external diameter of heat pipe can be selected 38 millimeters for use.Row's number of general heat exchange of heat pipe can be controlled in 4-12 row and is advisable.Under the permission situation of conditions such as resistance, deashing and installation, the pitch of heat pipe should be got for a short time as far as possible and is advisable.On the endotherm section of heat-pipe air preheater and heat pipe economizer, some novel fins fairshaped, not dust stratification are housed, promptly eccentric annulus fin, and make the big one side of area, towards the sweep of gases place.For the eccentric annulus of the following boiler of 4T/H, its external diameter is 50 millimeters, 25 millimeters of internal diameters, and eccentric throw 5-10 millimeter, the thick 0.8-1.2 millimeter of fin, wing is apart from the 10-15 millimeter.For the eccentric annulus of 4T/H and above boiler thereof, its external diameter is 76 millimeters, 38 millimeters of internal diameters, and eccentric throw 8-16 millimeter, the thick 1-1.5 millimeter of fin, wing is apart from the 10-15 millimeter.The length of heat pipe heat-absorbing section is at 0.5-2 rice, and the length of heat release section is at 0.3-1.7 rice.The flue both sides of heat-pipe air preheater and heat pipe economizer, equal loading manhole door is so that check.On the heat release section of heat-pipe air preheater, the annulus fin is housed, for the following boiler of 4T/H, the external diameter of annulus fin is 50 millimeters, 25 millimeters of internal diameters.For the above boiler of 4T/H, the external diameter of annulus fin is 76 millimeters, 38 millimeters of internal diameters.Their fin thickness is the 0.8-1.2 millimeter, and the wing distance is the 5-12 millimeter.The heat release section of heat pipe economizer is not for overlapping the photo-thermal pipe of fin.
On the endotherm section and the heat-insulating shield between the heat release section of heat-pipe air preheater and heat pipe economizer, all adopt double-deck adiabatic sheet metal to form, the i.e. sheet iron of two 4-10 millimeters, pin with some 10-20 millimeters is connected as a single entity, and make and wherein be filled with air or fill other heat-insulating material, to replace steel plate and to increase the rigidity of this steel plate.
The water of heat pipe economizer is sidelong heat part and heat preservation hot water tank when being connected as a single entity, and its intersection has added on earth a cycle partition not up and down, in order to the storage water in the heat preservation hot water tank, can continue to circulate with heat pipe economizer formation and heat.In heat pipe economizer and heat preservation hot tank top, be provided with the flange hand-hole, so that maintenance.And at the top of heat preservation hot water tank, also be provided with a permeability cell that surpasses into (soft) water tank height, so that heat pipe economizer is when flowing out hot water, inlet water tank can utilize its potential difference and automatically mend soft water to heat preservation hot water tank and heat pipe economizer.When cold soft water is flowed into, can reduce influence, so, be provided with the inflow temperature buffer board more than two one on the other in the soft water import department of heat preservation hot water tank to outflow hot water temperature reduction.
On the heat exchanger cuboid of the whole first half, formed add earlier hot blast, after add hot water, and in the heat preservation hot water tank, will store water and continue hydronic new technological flow.And the softening water pump that matches with it, Na-ion exchanger, a high position are advanced the new water inlet system that (soft) water tank and heat preservation hot water tank, heat pipe economizer, feed pump and boiler are formed.So this new technology and new system are more perfect, more reasonable, also easier not only than original device and original system, also make medium and small boiler can advance hot blast simultaneously and can stably advance hot water intermittently, thereby the efficient that has improved boiler are exerted oneself and competitiveness.
The deduster cuboid of Lower Half is made up of the two-stage dust removal device, and it is long to be 0.7-3.5 rice, wide 0.7-3.5 rice, high 1.7-3.5 rice.
Wherein first order jet type dust collector is to be turned by the flue that is installed in back lance door on the heat exchanger cuboid to locate the convergent service pipe of binding downwards, and tiltedly parts such as guide plate, flue gas curved guiding surface, square liquid pool and compound arcuate plate are formed.Convergent service pipe section is one trapezoidal, and its inlet length is a 0.25-1.2 rice, and entrance width 0.70-3.50 rice, the height of convergent service pipe are 0.5-1.5 rice.Its outlet length is 0.10-0.80 rice, exit width 0.70-3.50 rice, and the distance of convergent service pipe and liquid level is a 0.1-0.6 rice.Between the exit and square liquid pool wall of convergent service pipe, be provided with one 15 °-60 ° the oblique guide plate of flue dust, and the flue gas curved guiding surface that to be provided with a radius at the flue dust turning be 0.05-0.50 rice.On the square liquid pool wall of oblique guide plate offside, it is the compound arcuate plate that 0.05-0.30 rice and another piece radius are 0.02-0.15 rice that a radius is housed, thereby the automatic spray equipment second time of having formed this deduster, when dirt liquid flows through, promptly hindered shelves and guide in the narrow slit between the compound arcuate plate and spray by this compound arcuate plate, formed the automatic spray and the circulation second time of dedusting liquid, make the flue dust of rising, during through this section, taken off dirt by spray washing, most of dedusting liquid is got back to liquid pool again and is continued to recycle.
Wherein the second level is cyclone centrifugal duster, is made up of plane rotation flue, centered cylinder and the parts such as leg-of-mutton gas approach section, curved tailgate and outlet pipe thereof of spirality volute.The plane of spirality volute rotation flue, its inlet length is a 0.25-1.20 rice, wide 0.70-3.50 rice, and the spirality volute be shaped as spiral of Archimedes.Its diameter of the centered cylinder that is centered on is a 0.25-1.50 rice, and leg-of-mutton gas approach section is arranged on the centered cylinder, in the even flow inlet and outlet pipe of the flue gas of make suring, so exit near the outlet pipe, be leg-of-mutton acute angle, its angle and is a right angled triangle about 15 °-45 °.Long right-angle side is in 15 ° of-60 ° of scopes of article one limit of centered cylinder, between this long right-angle side and spirality volute, be provided with the arc that flue dust separates, and this arc matches with the convergent service pipe wall of jet type dust collector, formed the automatic spray equipment first time of dedusting liquid.Be the high speed dirt liquid that is separated in the spiral volute outer wall, behind this spray piping, can be ejected into the convergent service pipe outlet throat place of front jet type dust collector automatically, impel the original flue dust of import, progressively assemble, quickening the dust suction of liquid pool, and jetting fluid is got back to liquid pool again and can be continued to recycle.
The liquid pool of deduster is a cuboid, scribbles the corrosion resistant anti-wear material around it.Around the liquid pool bottom, tangential direction disturbance pipe is housed, in order to avoid the dirt slurry stops up.In the outside of liquid pool body shell, ball float feed liquor valve and U type overflow pipe also are housed, to keep liquid level, the vertical range of liquid level and convergent service pipe outlet is controlled in the 0.10-0.60 rice scope, thereby guarantees efficiency of dust collection.In the bottom of liquid pool, blowoff valve is housed, and blow-off line is connected near sedimentation basin, in order to the precipitation and the recovery of dirt slurry.
Operation principle of the present invention is as follows:
When the flue dust of boiler with certain temperature or kiln,, when at first entering the heat-pipe air preheater on top, promptly heated the required air of boiler or kiln burning with suitable flow velocity.Air is imported by pressure fan, and thereby heating, promoting burning and augmentation of heat transfer has improved the efficient of boiler and exerts oneself after hot air duct is delivered under the fire grate, and flue dust continues to flow into heat pipe economizer and heat preservation hot water tank, the feedwater of having heated boiler again immediately.Feedwater is advanced (soft) water tank by a high position and is entered, heating and being stored in the heat preservation hot water tank in heat pipe economizer, and and heat pipe economizer form Natural Circulation and continued to add stand-by heat.When boiler feed water, only need start feed pump, just the hot water in heat pipe economizer and the heat preservation hot water tank can be squeezed into boiler, high position in the boiler room is advanced (soft) water tank simultaneously, utilize its potential difference and can automatically soft water be supplemented in heat pipe economizer and the heat preservation hot water tank, continue heating, store and circulation, thus the safe and reliable and economy when having guaranteed that medium and small boiler is intermittently intake operation.
Like this after the flue dust temperature reduces, flow into the deduster cuboid of bottom through the turning guide plate, at first enter the throat of the convergent service pipe of first order jet type dust collector, because of the pulsation of flue dust speed and the automatic spray first time of dedusting liquid, impel the flue dust initial gross separation, grit is progressively assembled, when reaching the work section, most of grit is absorbed and sedimentation by liquid pool, and the small part flue dust flows into the fluctuation of liquid level in the narrow slit of compound arcuate plate and sprays, and has formed the automatic spray second time of deduster, make the mobile flue dust that rises, when this section, another spray washing, the grit that is removed is still got back to liquid pool and is precipitated circulation.Remaining grit, dedusting liquid and flue gas low speed together rises, and flow in the flue of spirality volute, progressively plane rotation and acceleration are flowed, and this has just formed second level cyclone centrifugal duster, and flue dust is in quickening process of flowing, automatically separation and concentrated, inboard flue gas, clean because of sloughing dirt liquid, the triangle admission section place on centered cylinder, flow into the outlet pipe, discharge from chimney with induced-draught fan again.The remaining dirt liquid in the outside by the arc on triangular section institute shelves, and utilizes its kinetic energy and the convergent service pipe exit of introducing the jet type dust collector of front, has formed the automatic spray and the circulation first time of dedusting liquid, with the dust suction of acceleration liquid pool.
The present invention, being in operation to keep certain liquid level, to obtain minimum cigarette resistance and best dust removing effects.This can utilize ball float feed liquor valve and the control of U type overflow pipe.Dedusting liquid can add the liquid sources such as continuous blowdown alkali waste water of alkaline agents such as lime or boiler with river, running water.Enter the deduster liquid pool if any spent lye, can also further eliminate the SO in the flue dust
2Pollution and harm.After operation a period of time, open bottom blow-down valve and dust discharge slurry, just need after the blowdown to replenish quantitative dedusting liquid, so this jet type dust collector only is to utilize liquid pool to come control of dust and utilize dedusting liquid to carry out automatic spray and circulation for medium.In service, because of flue dust has temperature evaporation section dedusting liquid, so basic few dedusting liquid that consumes only just needs to replenish quantitative dedusting liquid after the blowdown.So its consumption liquid measure significantly reduces, and the dirt of discharging slurry, reclaiming grit and energy-conservation through precipitation, post precipitation, the clear water of emitting can directly enter in the dump to replace coal to add water or to enter in the cloudy well of blowdown of boiler, with acid-base neutralization, so also do not produce secondary pollution.
The present invention has following characteristics compared with prior art:
(1) the present invention is applicable to the 0.5-10T/H boiler, in the dedusting task of finishing of efficient, low-resistance, high-quality, again can be fully, effectively utilize fume afterheat and heat air-supply and feedwater, there is something special down (former boiler, former factory building, the former induced-draught fan that send) former to make boiler, can be chronically, safe operation continuously, economical operation and environmental protection operation utilizes its principle and above-mentioned size range is suitably amplified, also applicable to the 20-35T/H boiler.
(2) the present invention to the design cycle of medium and small boiler back-end surfaces is: heating air-supply (heat-pipe air preheater) earlier, back heated feed water (heat pipe economizer and heat preservation hot water tank).From the heat transfer viewpoint analysis, air preheater belongs to gas one gas type heat exchange, and it is difficult for heating, so heating air-supply earlier at high temperature is correct, also is favourable.Not only more easily heating, and the consumption steel is few, and volume is little.From thermal efficiency viewpoint analysis, utilizing same fume afterheat, promptly reduce under the same exhaust gas temperature, as heated feed water, only can reduce the Q2 heat loss, as the heating air-supply, then can not only reduce same Q2 heat loss, can also continue to reduce Q3 and Q4 heat loss.So the heating air-supply can promote burning and augmentation of heat transfer, and is bigger than the effect of simple heated feed water.Especially be applicable to the actual conditions that the industrial boilers in China coal variety is changeable, so heating air-supply earlier, the flow process of back heated feed water is than existing first heated feed water, and the conventional process flow of back heating air-supply is more advanced rationally.
(3) the present invention has adopted novel heat exchange of heat pipe; The heat-pipe air preheater and the heat pipe economizer that have promptly adopted high-performance heat transfer components-heat pipe to form.Between its endotherm section and the heat release section, form, every cutting, can not leak mutually by the adiabatic sheet metal of bilayer.And the tube wall temperature of endotherm section, substantially near the cigarette temperature, thereby be difficult for sticking grey, and on endotherm section, adopt the novel fin of fairshaped not dust stratification, suitably relax the wing distance and improved cigarette speed, separate plate washer and corresponding lance door being provided with the above flue of two fans on the flue of front and back again, but switch lance door in service and improve local cigarette speed reaches and blows grey self-cleaning purpose.Because current effective aggregate measures, finally solve easy dust stratification, the stifled ash of heat pipe fin and be difficult to the hard nut to crack of deashing, can the penetration and promotion heat exchange of heat pipe thereby make on the medium and small boiler, make full use of fume afterheat and improve the efficient of boiler, exert oneself and competitiveness.
(4) heat-pipe air preheater of the present invention, volume little (be raw steel tube air preheater about 1/3rd), the consumption steel is few, and the air-supply piping is easy, and cigarette resistance and windage are all less, Operation and Maintenance is easy, hot blast advances the variation that stove can adapt to coal, promotes burning and augmentation of heat transfer, and acts on characteristics such as stable and long service life, so be subjected to general welcome and application, for the saving steel and the energy savings of medium and small boiler contributes.
(5) the present invention, adopt new heat pipe economizer, heat preservation hot water tank and a high position to advance the water supply and the heating system of (soft) water tank, can be applicable to the actual conditions of the interrupted water inlet of medium and small boiler especially, not only make feedwater advance boiler reliably and promote safe operation, and feedwater can stably be heated and reduce the vapour pressure fluctuation in when water inlet, improve quality of filling gas, and promote the economical operation of boiler.
(6) deduster part of the present invention is the two-stage dust removal device that jet type dust collector and partial cyclone centrifugal duster by the first order are in series.Its more former boiler uses water film type duster separately, not only save a large amount of valuable water resources and do not produced secondary pollution, and it only is to utilize dedusting liquid to carry out automatic spray and circulation as medium, and utilize liquid pool to come control of dust, so not loss dedusting liquid is (in service substantially, because of flue dust has temperature, and evaporation section dedusting liquid, available ball float feed liquor valve is made small amount of supplemental).After only being blowdown, just need to replenish quantitative dedusting liquid.After the blowdown, can precipitate again and reclaim grit and energy-conservation.Dedusting liquid can add liquid sources such as alkaline agent and continuous blowdown system of boiler alkali waste water with river, running water, running water.Enter if any spent lye, can also eliminate pollution and the harm of SO2, this is that existing deduster (comprises dedusting-heat preservation hot water tank door to access such as wet type and whirlwind be centrifugal; The 14-permeability cell; A 15-high position is advanced (soft) water tank; 16-inflow temperature buffering dividing plate; 17-heat pipe economizer outlet pipe; 18-heat preservation hot tank inlet pipe; Lance door behind the 19-; 20-flue dust turning guide plate; Separate plate washer behind the 21-; 22-jet type dust collector convergent service pipe; The 23-arc; Automatic spray conduit of 24-; The oblique guide plate of 25-; 26-flue gas curved guiding surface; The square liquid pool of 27-; 28-tangential direction disturbance pipe; 29-multi-function dust remover pedestal; The 30-bottom blow-down valve; 31-feed liquor ball float and overflow pipe; 32-compound arcuate plate; 33-deduster door to access; 34-centered cylinder (internal diameter is the exhanst gas outlet pipe); 35-spiral volute.
Embodiment is an example with the 1T/H boiler.
By preceding lance door (3), heat-pipe air preheater (9), heat pipe economizer (10), back lance door (19) and heat preservation hot water tank (12) are cascaded by flue, have formed the heat exchanger cuboid of the first half, and be its long 1 meter, wide 1 meter, high 1.2 meters.The upper part of heat exchanger cuboid is the heat release section of heat-pipe air preheater (9), the heat release section of heat pipe economizer (10) and heat preservation hot water tank (12).And heat preservation hot water tank and heat pipe economizer water are sidelong hot arc and are connected as a single entity, its long 1 meter of heat exchanger cuboid upper part, wide 1 meter, high 0.55 meter, the lower part in the heat exchanger cuboid is a flue, be provided with the endotherm section of preceding lance door (3), heat-pipe air preheater (9), the endotherm section of heat pipe economizer (10), back lance door (19), flue and flue dust turning guide plate parts such as (20) are formed, its long 1.2 meters, wide 1 meter, high 0.6 meter.Before lance door (3) be located at chimney intake place before the heat-pipe air preheater, back lance door (19) is located at the flue outlet place behind the heat pipe economizer, each grows 0.2 meter forward and backward lance door, and is wide 1 meter, 0.6 meter of height overall.This is by two groups of front and back, and more than the second gear, but on the separation plate washer of each comfortable flue, two lance doors (3,19) of independent operation switch are formed.
Heat pipe arrangement in heat-pipe air preheater (9) and the heat pipe economizer (10) is fork row.The heat pipe external diameter is 25 millimeters, and the heat pipe length overall is 1.2 meters.Heat-pipe air preheater (9) is established 6 heat extraction pipes along the flow of flue gas direction, and along the vertical direction of flow of flue gas, establishing every row is 14 heat pipes.The arrangement of heat pipe economizer (10) and last same.On the endotherm section of heat pipe, all install streamlined not dust stratification device) hard nut to crack that cann't be solved, this has directive significance to China's certain areas high-sulfur burning of coal and improvement.Its also more former boiler uses cyclone centrifugal duster separately, overcome high, the easy to wear and soot emissions of cigarette resistance and be difficult for shortcoming up to standard, and make boiler former there is something special down, can install this multi-function dust remover on the spot additional, it can eliminate the Mars hidden danger in the flue dust again fully, and the high-quality dedusting, so also be specially adapted to prevent fires, use in the explosion-proof and dustproof environment of having relatively high expectations.According to the boiler operatiopn actual measurement, boiler efficiency improves 5-10%, and boiler output improves 10-15%, and dust collector efficiency is at 92-96%, and the dustiness of fume emission is at 80-150mg/M
3Lingemann blackness is the 0-1 level, has realized heat pipeization, improvement and the rationalization of medium and small boiler back-end surfaces, and makes afterbody hot side and mutual integratorization of deduster and fast-assemblingization.
(7) the present invention has done comprehensive consideration and unified the arrangement to the aspects such as design, manufacturing, installation, operation and maintenance of medium and small boiler afterbody hot side and deduster, and with combining of five in one such as heat pipe hot-blast, heat pipe hot water, heat preservation hot water tank, jet type dust collector and cyclone centrifugal duster, not only make flue shorter, flat, straight and reduce the cigarette resistance, also make volume compact, equipment more makes up fast-assembling, therrmodynamic system is also more perfect rationally, changed the design of original boiler room, dwindle the area of original boiler room, saved capital cost and metal material.And on this multi-function dust remover, the full hot blast of design arrangement, all hot water or have hot blast concurrently and multi-functional, many adjustings of hot water efficient as required, the double stage tandem deduster of low-resistance and high-quality, this at home and abroad in the deduster product create, have great vitality and competitiveness, can not only in the Industrial Boiler in the whole nation and metallurgical furnace, promote the use of, bring into play its huge economic benefit and social benefit, also may become exported product, for state earns foreign exchange, win glory for the motherland, for state contributes!
Below in conjunction with accompanying drawing, embodiments of the invention are described:
Accompanying drawing-structural representation of the present invention.
1-heat pipe economizer flue side inspection door among the figure; 2-heat-pipe air preheater flue side inspection door; Lance door before the 3-; Separate plate washer before the 4-; The streamlined fin of 5-; The double-deck thermal baffle of 6-; 7-annulus fin; The 8-heat pipe; The 9-heat-pipe air preheater; The 10-heat pipe economizer; The 11-cycle partition; 12-heat preservation hot water tank; 13 novel heat absorption fin-be eccentric annulus, its external diameter is 50 millimeters, 25 millimeters of internal diameters, 6 millimeters of eccentric throws, thick 1.2 millimeters of fin, 12 millimeters of wing distances, 0.6 meter of heat pipe heat-absorbing section length, 0.05 meter of the adiabatic section length of heat pipe, 0.55 meter of the heat release section length of heat pipe.The annulus fin is housed on the heat release section of heat-pipe air preheater, and its external diameter is 50 millimeters, and internal diameter is 25 millimeters, thick 1 millimeter of wing, and wing is apart from 8 millimeters.The heat release section of heat pipe economizer is not for overlapping the photo-thermal pipe of fin.
At the heat release section of heat exchange of heat pipe and the heat-insulating plate structure between the endotherm section, all adopt double-deck adiabatic sheet metal (6), with two 6 millimeters iron plate up and down, and be that 12 millimeters pin connects and is one with several diameters.
In the water inlet of heat preservation hot water tank, three inflow temperature buffer boards (16) one on the other are housed.Be sidelong the intersection of heat part at heat preservation hot water tank and heat pipe economizer water, on earth a cycle partition (11) not up and down is housed.
The deduster cuboid of Lower Half is the two-stage dust removal device that is in series by jet type dust collector and cyclone centrifugal duster, and is its long 1 meter, wide 1 meter, high 1.7 meters.
The convergent service pipe (22) of first order jet type dust collector wherein, long 0.3 meter of its import, import is wide 1 meter, long 0.2 meter of outlet, export wide 1 meter, the convergent service pipe is high 0.5 meter, and convergent service pipe outlet is 0.2 meter with the distance of liquid level, liquid pool high 1 meter, between convergent instrumentation tubes exit and the liquid pool wall, be provided with one 30 ° oblique guide plate (25), and, be provided with the flue gas curved guiding surface (26) of 0.25 meter of radius at convergent service pipe exit turn place.At the opposite side of liquid pool, be provided with a radius and be 80 millimeters and radius and be 40 millimeters complex arc plate (32), formed the automatic spray conduit second time of dedusting liquid, it is 1.5 millimeters that the space between two arcs is contracted to last gap gradually.
Wherein the second level is cyclone centrifugal duster, the plane rotation flue of spiral volute (35), and its import is wide 0.3 meter, and is contracted to zero gradually by spiral of Archimedes.Centered cylinder (34) diameter is 0.3 meter, and the triangle gas approach section on the centered cylinder and the angle of arc are 20 °, and the diameter of outlet pipe (34) is 0.3 meter.
Claims (4)
1, a kind of multi-function dust remover, comprise heat-pipe air preheater, heat pipe economizer and heat preservation hot water tank, it is characterized in that: after preceding lance door, heat-pipe air preheater, heat pipe economizer, back lance door and heat preservation hot water tank are cascaded by flue, be connected with the two-stage dust removal device that jet type dust collector and cyclone centrifugal duster are in series, and the heat preservation hot water tank is on the flue of back on the lance door, and is sidelong the heat part with heat pipe economizer water and is connected as a single entity;
Forward and backward two groups of lance doors are to be contained in flue independent operation separately and more than the second gear to separate on the plate washer.
On the endotherm section of heat-pipe air preheater and heat pipe economizer, novel heat absorption fin fairshaped, not dust stratification is housed all, promptly eccentric annulus fin, and make the big one side of its area, towards the sweep of gases place.Flue both sides at heat-pipe air preheater and heat pipe economizer are equipped with manhole door, at the heat release section of heat-pipe air preheater and heat pipe economizer and the heat-insulating shield between the endotherm section, all adopt double-deck adiabatic sheet metal to form;
The heat preservation hot tank top is provided with the flange hand-hole and surpasses the into permeability cell of (soft) water tank height, and in water inlet place of heat preservation hot water tank, be equipped with more than two, inflow temperature buffer board one on the other, and, install on earth a cycle partition not up and down additional at the heat release part intersection of heat preservation hot water tank and heat pipe economizer water side;
Jet type dust collector is mounted in the deduster cuboid the inside below the heat exchanger cuboid, and by downward convergent service pipe, tiltedly parts such as guide plate, flue gas curved guiding surface, square liquid pool and compound arcuate plate are formed.The compound arcuate plate, compound and formed the automatic spray equipment second time of dedusting liquid by the different arc of two radiuses;
Cyclone centrifugal duster, be top at the deduster cuboid, plane rotation flue, centered cylinder and parts such as leg-of-mutton gas approach section curved tailgate and outlet pipe thereof by the spirality volute are formed, and curved tailgate matches with the convergent service pipe wall of front jet type dust collector, has formed the automatic spray equipment first time of dedusting liquid;
The liquid pool of deduster is a cuboid, in the outside of liquid pool body shell, ball float feed liquor valve and U type overflow pipe is housed, and the optimum distance that exports with control liquid level and convergent service pipe is at 0.1-0.6 rice.Around the liquid pool bottom, tangential direction disturbance pipe is housed.In the bottom of liquid pool, blowoff valve is housed, and blow-off line should be connected near sedimentation basin.
2, a kind of multi-function dust remover, comprise heat-pipe air preheater, it is characterized in that: after preceding lance door, heat-pipe air preheater and after-blow ash door are cascaded by flue, be connected with the two-stage dust removal device that jet type dust collector and cyclone centrifugal duster are in series;
Forward and backward, two groups of lance doors are to be contained in flue independent operation separately and more than the second gear to separate on the plate washer;
On the endotherm section of heat-pipe air preheater, novel heat absorption fin fairshaped, not dust stratification is housed, promptly eccentric annulus fin, and make the big one side of area, towards the sweep of gases place.Flue both sides at heat-pipe air preheater are provided with door to access.At the heat release section of heat-pipe air preheater and the heat-insulating shield between the endotherm section, adopt double-deck adiabatic sheet metal to form;
Jet type dust collector is mounted in the deduster cuboid the inside below the heat exchanger cuboid, by downward convergent service pipe, tiltedly parts such as guide plate, flue gas curved guiding surface, square liquid pool and compound arcuate plate are formed.The compound arcuate plate, compound and formed the automatic spray equipment second time of dedusting liquid by the different arc of two radiuses;
Cyclone centrifugal duster, be top at the deduster cuboid, plane rotation flue, centered cylinder and parts such as leg-of-mutton gas approach section, curved tailgate and outlet pipe thereof by the spirality volute are formed, and curved tailgate matches with the convergent service pipe wall of front jet type dust collector, has formed the automatic spray equipment first time of dedusting liquid;
The liquid pool of deduster is a cuboid, in the outside of liquid pool body shell, ball float feed liquor valve and U type overflow pipe is housed, and the optimum distance that exports with control liquid level and convergent service pipe is at 0.1-0.6 rice.Around the liquid pool bottom, tangential direction disturbance pipe is housed.In the bottom of liquid pool, blowoff valve is housed, and blow-off line should be connected near sedimentation basin.
3, a kind of multi-function dust remover, comprise heat pipe economizer and heat preservation hot water tank, it is characterized in that: after preceding lance door, heat pipe economizer, back lance door and heat preservation hot water tank are cascaded by flue, be connected with the two-stage dust removal device that jet type dust collector and cyclone centrifugal duster are in series, and the heat preservation hot water tank is on the flue of back on the lance door, and is sidelong the heat part with heat pipe economizer water and is connected as a single entity;
Forward and backward two groups of lance doors are to be contained in flue independent operation separately and more than the second gear to separate on the plate washer;
On the endotherm section of heat pipe economizer, be equipped with fairshaped, the novel heat absorption fin of dust stratification not, promptly eccentric annulus fin, and make the big one side of its area is towards the sweep of gases place.Flue both sides at heat pipe economizer are provided with door to access.At the heat release section of heat pipe economizer and the heat-insulating shield between the endotherm section, adopt double-deck adiabatic sheet metal to form;
The heat preservation hot tank top is provided with the flange hand-hole and surpasses the into permeability cell of (soft) water tank height, and in water inlet place of heat preservation hot water tank, adorn more than two, inflow temperature buffer board one on the other, and, install on earth a cycle partition not up and down additional at the heat release part intersection of heat preservation hot water tank and heat pipe economizer water side;
Jet type dust collector is mounted in the deduster cuboid the inside below the heat exchanger cuboid, by downward convergent service pipe, tiltedly parts such as guide plate, flue gas curved guiding surface, square liquid pool and compound arcuate plate are formed.The compound arcuate plate, compound and formed the automatic spray equipment second time of dedusting liquid by the different arc of two radiuses;
Cyclone centrifugal duster, top at the deduster cuboid, plane rotation flue, centered cylinder and parts such as leg-of-mutton gas approach section, curved tailgate and outlet pipe thereof by the spirality volute are formed, and curved tailgate matches with the convergent service pipe wall of front pulsation dedusting, has formed the automatic spray equipment first time of dedusting liquid.
The liquid pool of deduster is a cuboid, in the outside of liquid pool body shell, ball float feed liquor valve and U type overflow pipe is housed, and the optimum distance that exports with control liquid level and convergent service pipe is at 0.1-0.6 rice.Around the liquid pool bottom, tangential direction disturbance pipe is housed.In the bottom of liquid pool, blowoff valve is housed, and blow-off line should be connected near sedimentation basin.
4, a kind of multi-function dust remover is characterized in that having installed the two-stage dust removal device that jet type dust collector and cyclone centrifugal duster are in series in the rectangular body shell of deduster;
Jet type dust collector is in deduster cuboid the inside, is made up of parts such as downward convergent service pipe, oblique guide plate, flue gas curved guiding surface, square liquid pool and compound arcuate plates.The compound arcuate plate, compound and formed the automatic spray equipment second time of dedusting liquid by the different arc of two radiuses;
Cyclone centrifugal duster is the top at the deduster cuboid, plane rotation flue, centered cylinder and parts such as leg-of-mutton gas approach section, curved tailgate and outlet pipe thereof by the spirality volute are formed, and curved tailgate matches with the convergent service pipe wall of front jet type dust collector, has formed the automatic spray equipment first time of deduster;
The deduster liquid pool is a cuboid, outside at liquid pool body shell, ball float feed liquor valve and U type overflow pipe are housed, the optimum distance that exports with control liquid level and convergent service pipe is at 0.1-0.6 rice, around the liquid pool bottom, tangential direction disturbance pipe is housed, in the bottom of liquid pool, blowoff valve is housed, and blow-off line should be connected near sedimentation basin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92100412A CN1063154A (en) | 1992-01-10 | 1992-01-10 | Multi-function dust remover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92100412A CN1063154A (en) | 1992-01-10 | 1992-01-10 | Multi-function dust remover |
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| CN1063154A true CN1063154A (en) | 1992-07-29 |
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| CN92100412A Pending CN1063154A (en) | 1992-01-10 | 1992-01-10 | Multi-function dust remover |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196381B (en) * | 2008-01-08 | 2010-06-16 | 哈尔滨工程大学 | Pipe shell type heat exchanger with dedusting function |
| CN103968675A (en) * | 2014-05-20 | 2014-08-06 | 莱芜钢铁集团有限公司 | Low-temperature smoke pre-dedusting device and method for rotary hearth furnace |
-
1992
- 1992-01-10 CN CN92100412A patent/CN1063154A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196381B (en) * | 2008-01-08 | 2010-06-16 | 哈尔滨工程大学 | Pipe shell type heat exchanger with dedusting function |
| CN103968675A (en) * | 2014-05-20 | 2014-08-06 | 莱芜钢铁集团有限公司 | Low-temperature smoke pre-dedusting device and method for rotary hearth furnace |
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