CN102350160B - System for purifying flue gas produced by waste circuit board burning - Google Patents
System for purifying flue gas produced by waste circuit board burning Download PDFInfo
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- CN102350160B CN102350160B CN 201110204461 CN201110204461A CN102350160B CN 102350160 B CN102350160 B CN 102350160B CN 201110204461 CN201110204461 CN 201110204461 CN 201110204461 A CN201110204461 A CN 201110204461A CN 102350160 B CN102350160 B CN 102350160B
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Abstract
The invention discloses a system for purifying flue gas produced by waste circuit board burning. The system for purifying flue gas produced by waste circuit board burning can overcome the defects that water spray quenching of flue gas produced by waste organic material burning needs an additional waste liquid treatment process and a cold air feeding process so that technology economy is reduced; and slow cooling of exhaust-heat boiler flue gas or heat exchanger flue gas promotes resynthesis of flue gas dioxin. The system for purifying flue gas produced by waste circuit board burning comprises a gravity settling chamber, a whirlwind dust chamber, a regenerative chamber, a high-temperature high-pressure draught fan, a limestone blowing chamber and a cloth bag dust chamber, wherein the gravity settling chamber, the whirlwind dust chamber, the regenerative chamber, the high-temperature high-pressure draught fan, the limestone blowing chamber and the cloth bag dust chamber are connected orderly by pipes. An inlet of the gravity settling chamber is connected to smoke outlet of an incinerator by a pipe. An output of the cloth bag dust chamber is connected to an air inlet of an environmentally friendly chimney by a pipe. A high-pressure blower is connected to the regenerative chamber by a pipe. The system for purifying flue gas produced by waste circuit board burning combines multiple technologies of high-specific surface area ceramic heat storage, multi-stage dedusting and dry dedusting. Flue gas treated by the system for purifying flue gas produced by waste circuit board burning satisfies dioxin and dust discharge standards. The system for purifying flue gas produced by waste circuit board burning does not need additional waste liquid treatment processes, and has energy-saving and environmentally friendly characteristics and a low cost.
Description
Technical field
The present invention relates to danger wastes environmental protection disposal technology field, particularly a kind of integrated high-specific surface area ceramic heat-storing conducts heat and the system for purifying flue gas produced by waste circuit board burning of segmentation dry dedusting technology.
Background technology
Waste printed circuit board is comprised of glass fiber reinforced plastics, plastics and various metals, also contains poisonous brominated flame retardant.At present, one of waste printed circuit board disposal common methods is burning disposal.Due to the debirs incomplete combustion, give off a large amount of stimulation foul waste gas and contain in a large number the poisonous fume of Polychlorinated biphenyls/bioxin.Waste printed circuit board is disposed in economic environmental protection becomes global environmental protection focus.Research and development bioxin and dust emission purifying flue gas produced by waste circuit board burning technology up to standard meet national circular economy policy and " 12 " national economic development requirement, but Promoting Sustainable Economic Development and " amphitypy " social construction.
The waste printed circuit board incineration flue gas contains toxic composition, and suppressing bioxin again synthetic is the gas cleaning emphasis, and the high dustiness of flue-gas temperature is large in addition, and gas cleaning also requires high-effective dust-removing and high efficiente callback fume afterheat.Just suppress bioxin and again synthesize the aspect, flue gas is cooling rapidly is the most effectual way of avoiding bioxin again to synthesize.During ℃ left and right, flue gas Slow cooling to 300 ~ 500, the flue gas organic poison can regenerate bioxin, so the uniformity conclusion is that flue gas is quenched to lower than 300 ~ 250 ℃ and following temperature within 1 ~ 2 second.Conventional smoke cooling method out of breath is directly to spray air or water in flue gas, and flue-gas temperature is reduced to rapidly (even to 82 ℃) below 250 ℃.Direct water spray in flue gas can dust adsorption, also can be corroded to prevent aftertreatment device by the absorption portion acidic materials, yet after processing, the processing of waste liquid can increase operating cost.Mix a large amount of cold airs in flue gas, can increase flue gas volume and follow-up equipment gas cleaning load, reduce process economy.With regard to conventional Mist heat recovering aspect, in the flue gas cool-down process, Mist heat recovering can improve process economy.The Mist heat recovering conventional method is to utilize waste heat boiler or heat exchanger to produce steam/heat water or warm-up combustion-supporting air.Waste heat boiler can provide large heat exchange area, but flue gas cool-down speed is slow, cool time is long, and dangerous waste incineration seldom adopts because quantity of heat production is unstable in addition.Normally naturally cooling or shower water is strengthened coolingly with the cools down flue gas, and because heat exchange coefficient is not high, the cools down area is large, and is less economical, and the flue gas stroke is long, grows (〉 cool time〉2s).With regard to conventional dedusting aspect, waste heat boiler or heat exchanger flue gas cool time long (〉〉2s), for flue gas organic poison He Cheng bioxin has again been created good kinetic reaction condition.Waste heat boiler or heat exchanger are also common cleaners, have normally removed the most dust in the flue gas when cooled flue gas.In addition, traditional flue gas dust collection method has gravitational dust collection, cyclone dust removal, electrostatic precipitation, shaped Venturi dedusting and bag-type dust etc.According to the regulation of " hazardous waste is concentrated incineration disposal engineering construction specification requirement " (No. [2004] 15, environment-development), must not use electrostatic precipitation and dust removal with machine device.Gravitational dust collection and cyclone dust removal can be processed high-temperature smoke, and shaped Venturi dedusting is wet dust removal (needs extra process toxic waste water), and electrostatic precipitation can only be processed the flue dust of 400 ℃ of left and right, and bag-type dust efficient is high, but enter bag flue dust temperature must＜200 ℃.Integrated augmentation of heat transfer and high-effective dust-removing technology, develop can realize flue gas rapidly the danger wastes incineration flue gas technique of cooling, high-effective dust-removing, high efficiente callback fume afterheat and economic security operation be that danger wastes disposal of resources industrial application is crucial.
The disclosure of the invention of notification number CN1493815A a kind of incineration of industry peril waste and method of comprehensive utilization, comprise the steps: that industrial dangerous waste is sent into waste incinerator to be burned, produce temperature and be the high-temperature flue gas of 800-900 ℃; To import secondary combustion chamber from the high-temperature flue gas that waste incinerator produces, and utilize the combustion-supporting temperature of secondary combustion chamber that makes of diesel fuel burner to remain on 1000-1500 ℃; Heating waste mineral oil wherein in the flue gas importing cracking distillation still of secondary combustion chamber discharge is made its cracking; The flue gas that the cracking distillation still is discharged imports the heat-condutive oil heat exchanger device, and the heating conduction oil makes conduction oil circulating-heating spent organic solvent in the conduction oil circulatory system reach useless animal and plant grease and refines processing; The flue gas that the conduction oil heat-exchanger rig is discharged imports rotary kiln, heating electroplating sludge or circuit board plant mud, make its water evaporates, add the extract that extracts copper, nickel metal in mud after the heating that rotary kiln is discharged, copper, nickel metal are present in extract with ionic forms, the mud that is insoluble to extract is sent into the curing making apparatus, extract is sent into extraction equipment and is carried out ion exchange and obtain copper, nickel metal, wherein the precipitation of ion exchange chemical reaction generation is also sent into curing apparatus, mixes with aforesaid mud and further makes various construction materials; The tail gas that rotary kiln is discharged imports exhaust treatment system, then is discharged to chimney through smoke exhaust fan.Though the method can be utilized the waste heat of flue gas, the thermal efficiency is not high and ignored that dust is piled up and the blocking pipe problem exists the flue gas cooling procedure long in pipeline, poisons composition bioxin synthetic, and the more problem of dust, effectively purifying smoke again.
Summary of the invention
The object of the invention is to overcome debirs incineration flue gas water spray chilling needs the extra process waste liquid and mixes cold air and reduce process economy, waste heat boiler or heat exchanger flue gas Slow cooling have impelled the shortcomings such as Yan gas Zhong bioxin synthesizes again, a kind of system for purifying flue gas produced by waste circuit board burning is provided, the multiple technical characterictics such as integrated high-specific surface area ceramic heat-storing heat transfer, multistage dedusting and dry method dust, flue gas dioxin and dust emission after processing are up to standard, without extra waste liquid disposal, energy-conserving and environment-protective, low cost.
the technical solution adopted for the present invention to solve the technical problems is: a kind of system for purifying flue gas produced by waste circuit board burning, described system for purifying flue gas produced by waste circuit board burning comprises the gravity settling chamber that connects successively by pipeline, the cyclone dust removal chamber, regenerator, the HTHP air-introduced machine, lime stone winding-up chamber and bag-type dust chamber, gravity settling chamber, the cyclone dust removal chamber, regenerator, the HTHP air-introduced machine, lime stone winding-up chamber and bag-type dust chamber consist of flue gas pipeline, the input of gravity settling chamber is connected with the exhaust opening of incinerator by pipeline, the output of bag-type dust chamber is connected with the air inlet of Environment protection chimney by pipeline, be connected with high pressure blower by pipeline on described regenerator, regenerator also is connected with the air inlet of incinerator by pipeline, high pressure blower, regenerator and the pipeline formation air pipe line that connects regenerator and incinerator air inlet.
Flue gas pipeline mainly realizes it being flue gas chilling and high-effective dust-removing, avoids and shortens flue gas in synthesis temperature 800 ~ 250 ℃ of times of zone, avoids occuring bioxin synthetic phenomenon again in flue gas purification system; Air pipe line is realized high-temperature preheated air, organizes furnace high-temperature burning, guarantee the incinerator hot operation require (ignition temperature〉1000 ℃, the exhaust combustion temperature〉1200 ℃), avoid bioxin to generate from the source.
The present invention has multiple technical characterictics such as " two sections dedustings, multistage dedusting and dry method dusts ", and the technique effect that these technical characterictics bring is that the exhaust gas dust discharging reaches " dangerous waste incineration pollution control criterion " (GB18484-2001) requirement.Two sections dedustings relate to high-temperature dust removal and low temperature dedusting.Flue dust (containing toxic organic exhaust gas) is removed whole coarse granules and most of thin dirt in gravity settling chamber and cyclone dust removal chamber, be removed the fine dirt of residue in the bag-type dust chamber.The particle that flows to the bag-type dust chamber is fine grained and subparticle, has affected bag-type dust chamber efficiency of dust collection.The not high problem of bag-type dust chamber efficient of bringing in order to overcome the classification dedusting, be provided with lime stone winding-up chamber before the bag-type dust chamber, unequigranular limestone particle sprays into lime stone winding-up chamber, limestone particle and flue gas mix in lime stone is jetted the chamber, in and acid gas in flue gas, limestone particle is with flow of flue gas and adhere to the bag-type dust outdoor face, has improved the composition that sticks to the dust size on the bag-type dust outdoor face, recovers the dust catching efficiency of bag-type dust chamber.Whole dust removal process does not use the wet dedusting technology such as cold water, shaped Venturi dedusting, washing that spray into, and uses without extra water source, avoids gas cleaning process secondary waste water pollution problem, has avoided pipeline acid corrosion problem, has extended flue gas purification system service life.
Regenerator can realize the high-specific surface area heat-accumulating heat-transfer, thereby realizes flue gas chilling (working in flue gas pipeline), avoids and shortens flue gas in synthesis temperature 250 ℃ ~ 800 times of zone, avoids occuring bioxin synthetic phenomenon again in flue gas purification system; Also realize simultaneously high-temperature preheated air (working) in air pipe line, organize furnace high-temperature burning, guarantee the incinerator hot operation require (ignition temperature〉1000 ℃, the exhaust combustion temperature〉1200 ℃), avoid bioxin to generate from the source.The flue gas dioxin discharging reaches " dangerous waste incineration pollution control criterion " (GB18484-2001) requirement, and in addition, more than 850 ℃, temperature is burned the solid carbon compound, can not form the black smoke of incomplete combustion.Improve process economy, constant temperature hot operation condition has been avoided additional energy source consumption.
It is that regenerator is arranged between dedusting the last period (gravity settling chamber, cyclone dust removal chamber) and rear one section dedusting (bag-type dust chamber) that the present invention has " the high-specific surface area heat-accumulating heat-transfer is arranged between two sections dedustings and carries out " technical characterictic, and this improves security, stability and the reliability of Di bioxin and dust emission in gas cleaning.The low temperature dedusting of bag-type dust chamber is the important guarantee of exhaust gas dust emission compliance.Flue dust is removed whole coarse granules and most of thin dirt in gravity settling chamber and cyclone dust removal chamber, guarantee in regenerator without too much dust accumulation and plugging fault generation, realizes that the flue gas chilling is stablized to carry out.Two regenerator 3 realize the flue gas chilling, have both avoided the flue gas cooling device of traditional flue gas purifying technique complexity, save space with the space and improve the process economics performance, avoid again the accidents such as cloth bag burns to occur, and guarantee bag-type dust chamber 7 safe operations.
As preferably, the pipeline that connects bag-type dust chamber and Environment protection chimney is provided with pressure regulator valve.The effect of pressure regulator valve is in time to regulate to control flue gas purification system drag losses and incinerator combustion chamber draft value, accomplishes that smoke evacuation is smooth.
As preferably, described gravity settling chamber is U-shaped or W shape.The flue dust temperature is reduced to 800 ℃ from 1000～1200 ℃ in gravity settling chamber, and dust becomes from liquid state and solid-stately solidifies and adhere to thermal storage ceramic ball phenomenon to avoid occuring in the Low Temperature Storage hot cell dust.
As preferably, described regenerator is horizontal type structure, is connected with motor on regenerator, and regenerator can periodic rotary be to switch flue gas pipeline and air pipe line under the Motor Drive effect along the own level axis, and the rotation period of regenerator is 60 ~ 120 seconds.Under Motor Drive, regenerator can be along own level axis periodic rotary, two regenerator are along self axis periodic rotary, realized the switching conversion of air pipe line and flue gas pipeline, avoided the use of high temperature transfer valve, simplify the flue gas purification system design, saved one-time investment expense and the day-to-day operation expense of process for purifying.
As preferably, be provided with the spherical ceramic particles layer in regenerator, the spherical ceramic particles layer by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form, regenerator arranges in pairs, regenerator is divided into Low Temperature Storage hot cell and high-temperature regenerator, Low Temperature Storage hot cell and high-temperature regenerator be co-conversion mutually along with the regenerator periodic rotary.
The thermal storage ceramic ball is Ceramic Balls, and the Ceramic Balls energy is high temperature resistant, also energy economy is obtained, and accomplishing can cleaning high-temp flue gas and reduction one-time investment and daily standing charges.Thermal storage ceramic ball specific area is greater than 800m
2/ m
3, rate of heat exchange is fast.Dustiness high-temperature flue gas seldom flows through from low-temperature heat accumulating Ceramic Balls gap, Low Temperature Storage hot cell, and violent gas-particle heat transfer occurs between flue gas and low-temperature heat accumulating Ceramic Balls, flue gas with sensible heat transfer to the low-temperature heat accumulating Ceramic Balls.The normal temperature combustion air flows through from high-temperature regenerator high-temperature heat accumulation Ceramic Balls gap, and violent gas-particle heat transfer occurs between air and high-temperature heat accumulation Ceramic Balls, and absorption of air is stored in the sensible heat in the high-temperature heat accumulation Ceramic Balls.Afterwards, the sensible heat that the low-temperature heat accumulating Ceramic Balls in Low Temperature Storage hot cell has absorbed high-temperature flue gas becomes the high-temperature heat accumulation Ceramic Balls, the high-temperature heat accumulation Ceramic Balls of high-temperature regenerator becomes the low-temperature heat accumulating Ceramic Balls for air thermal energy transfer, under the drive of motor, regenerator can be switched flue gas pipeline and air pipe line along own level axis periodic rotary, simultaneously the Low Temperature Storage hot cell of original flue gas pipeline has been transformed into the high-temperature regenerator of air pipe line, and the high-temperature regenerator of air pipe line has originally become the Low Temperature Storage hot cell of original flue gas pipeline.
As preferably, be equipped with import and outlet on Low Temperature Storage hot cell and high-temperature regenerator, import comprises air intlet and gas approach, and outlet comprises air outlet slit and exhanst gas outlet, air intlet and air outlet slit are positioned on high-temperature regenerator, and gas approach and exhanst gas outlet are positioned on the Low Temperature Storage hot cell.Along with flue gas pipeline and air pipe line switch, Low Temperature Storage hot cell and high-temperature regenerator change, change also occurs in air import and export, exhanst gas outlet on function.
As preferably, be 0.8 ~ 1.2m along the thickness of air current flow direction spherical ceramic particles layer, air or flue gas are 0.5 ~ 2 second by the time of spherical ceramic particles layer.Be import-Way out along the air current flow direction, flue gas flow through the variole granulosa in 0.5～2 second, two regenerator air pipe lines and flue gas pipeline switching cycle are 60～120 seconds, have realized the flue gas rapid cooling and have guaranteed stability and the continuation of flue gas quenching process.Two high-specific surface area heat-accumulating heat-transfers cooperation operations of the present invention are the third flue gas quick cooling methods except conventional smoke gas blowout water quick cooling and dilution air chilling, and particularly suitable and economical and energy saving cleaning are disposed the danger wastes incineration flue gas and used.
As preferably, HTHP air-introduced machine and high pressure blower are equipped with two, and two HTHP air-introduced machines are in parallel, two high pressure blower parallel connections.HTHP air-introduced machine and high pressure blower are two parallel connections, and one is standby, prevent that fortuitous event from occuring and affect the use of whole system.
As preferably, the indoor refractory insulating layer that is provided with of gravity settling chamber and cyclone dust removal.Gravity settling chamber and cyclone dust removal chamber liner flame-proof thermal insulation material, function of environment heat emission is few, and flue dust flows through the cyclone dust removal chamber without significant hypothermal, avoids that in gravity settling chamber and cyclone dust removal chamber, the flue dust temperature is in bioxin synthesis temperature scope again.
The invention has the beneficial effects as follows: the multiple technical characterictics such as the present invention is integrated, and the high-specific surface area ceramic heat-storing conducts heat, multistage dedusting and dry method dust, flue gas dioxin and dust emission after processing are up to standard, without extra waste liquid disposal, energy-conserving and environment-protective, low cost.
Description of drawings
Fig. 1 is agent structure schematic diagram of the present invention;
Fig. 2 is the schematic diagram of a kind of duty of the present invention;
Fig. 3 is the schematic diagram of another kind of duty of the present invention.
In figure: 1, gravity settling chamber, 2, the cyclone dust removal chamber, 3, regenerator, 4, high pressure blower, 5, the HTHP air-introduced machine, 6, lime stone winding-up chamber, 7, bag-type dust chamber, 8, pressure regulator valve, 9, incinerator, 10, Environment protection chimney, the exhaust opening of A, incinerator, B, lime stone winding-up chamber import, the air inlet of C, Environment protection chimney, the air inlet of D, high pressure blower, the air inlet of E, incinerator.Fig. 2 dotted line represents to cut off the withdraw from service pipeline; Fig. 3 dotted line represents to cut off the withdraw from service pipeline.
The specific embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure 1, a kind of system for purifying flue gas produced by waste circuit board burning mainly comprises gravity settling chamber 1, cyclone dust removal chamber 2, regenerator 3, high pressure blower 4, HTHP air-introduced machine 5, lime stone winding-up chamber 6 connects with insulating lining brick pipeline between 8, eight parts of bag-type dust chamber 7 and pressure regulator valve.Gravity settling chamber 1, cyclone dust removal chamber 2, regenerator 3, HTHP air-introduced machine 5, lime stone winding-up chamber 6 and bag-type dust chamber 7 consist of flue gas pipelines, the input of gravity settling chamber 1 is connected by the exhaust opening of pipeline with incinerator 9, the output of bag-type dust chamber 7 is connected by the air inlet of pipeline with Environment protection chimney 10, regenerator 3 also is connected by the air inlet of pipeline with incinerator 9, high pressure blower 4, regenerator 3 and the pipeline formation air pipe line that connects regenerator 3 and incinerator air inlet.Gravity settling chamber 1 is U-shaped, and the flow of flue gas space lining of gravity settling chamber 1 has been put air duct, 1 li of gravity settling chamber, flue gas-air heat exchange occurs, and makes flue gas cool-down to 800 ℃ and makes liquid dust change solid-state dust into.Gravity settling chamber 1 and cyclone dust removal chamber 2 built-in refractory insulating layers.Regenerator 3 is horizontal type structure, is connected with motor on regenerator 3, and regenerator 3 can periodic rotary be to switch flue gas pipeline and air pipe line under the Motor Drive effect along the own level axis, and the rotation period of regenerator 3 is 60 ~ 120 seconds.Regenerator 3 is interior, and pile up to form thickness along the air current flow direction be the spherical ceramic particles layer of 1m, the spherical ceramic particles layer by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form, the thermal storage ceramic ball is Ceramic Balls, regenerator 3 arranges in pairs, regenerator 3 is divided into Low Temperature Storage hot cell and high-temperature regenerator, periodically absorb obvious heat of smoke and warm-up combustion-supporting air, air and flue gas are 0.5 ~ 2 second by the time of variole granulosa, and Low Temperature Storage hot cell and high-temperature regenerator be co-conversion mutually along with regenerator 3 periodic rotary.Be equipped with import and outlet on Low Temperature Storage hot cell and high-temperature regenerator, import comprises air intlet and gas approach, outlet comprises air outlet slit and exhanst gas outlet, and air intlet and air outlet slit are positioned on high-temperature regenerator, and gas approach and exhanst gas outlet are positioned on the Low Temperature Storage hot cell.High pressure blower 4 and HTHP draw machine 5 and are two parallel connections, a preparation and a use.Under HTHP air-introduced machine 5 suction forces and motive force effect, 1000～1200 ℃ of high-temperature smokes flow to gravity settling chamber 1 from the A point, then the cyclone dust removal chamber 2 of flowing through successively, the Low Temperature Storage hot cell, HTHP air-introduced machine 5, lime stone winding-up chamber 6, bag-type dust chamber 7 and pressure regulator valve 8 enter Environment protection chimney finally by the C point; Under high pressure blower 4 motive force effects, combustion air flows to high-temperature regenerator from the D point, enters in incinerator finally by the E point.Be reduced to 800 ℃ in 1 li flue dust temperature of gravity settling chamber from 1000～1200 ℃, dust becomes from liquid state and solid-stately solidifies and adhere to the Ceramic Balls phenomenon and occur to avoid occuring in the Low Temperature Storage hot cell dust.The not high problem of bag-type dust chamber 7 efficient of bringing in order to overcome the classification dedusting, be provided with lime stone winding-up chamber 6 before bag-type dust chamber 7, unequigranular limestone particle sprays into lime stone winding-up chamber 6 from the B point, mix at lime stone winding-up 6 li of chambers limestone particle and flue gas, in and acid gas in flue gas, limestone particle is with flow of flue gas and adhere to bag-type dust chamber 7 outer surfaces, improve the composition that sticks to the dust size on 7 outer surfaces of bag-type dust chamber, recovered the dust catching efficiency of bag-type dust chamber 7.
Motor rotation axis is connected with regenerator, and the motor drives regenerator makes regenerator rotate along own level axis intermittent periods it, and two regenerator rotation periods are 60～120 seconds, and namely flue and air duct switching cycle are 60～120 seconds.High-temperature flue gas flows into the Low Temperature Storage hot cell and discharged sensible heat during 0.5 ~ 2 second time and cools to below 250 ℃ from 800 ℃, and air blasts high-temperature regenerator and absorbs heat rapidly and is warmed up to 600～700 ℃.After high-temperature preheated air flows to incinerator, high-temp combustion occurs in incinerator, suppress generation and the discharging of bioxin from the source.Two regenerator 3 are along self axis periodic rotary, realized expediently the switching conversion of air pipe line and flue gas pipeline, avoid the use of high temperature transfer valve, simplified the flue gas purification system design, saved one-time investment expense and the day-to-day operation expense of process for purifying.
Operation principle of the present invention is described below:
As shown in Figure 2, under HTHP air-introduced machine 5 suction forces and motive force effect, flue dust flows to gravity settling chamber 1 from A point (exhaust opening of incinerator 9), then the cyclone dust removal chamber 2 of flowing through successively, Low Temperature Storage hot cell (in Fig. 2 below regenerator), HTHP air-introduced machine 5, lime stone winding-up chamber 6, bag-type dust chamber 7 and pressure regulator valve 8 enter Environment protection chimney 10 finally by the C point; Under high pressure blower 4 motive force effects, combustion air flows to high-temperature regenerator (regenerator of top Fig. 2) from the D point, sprays in incinerator 9 finally by E point (air inlet of incinerator 9).
A point flue dust temperature is 1000～1200 ℃, and flue dust flows through the rear dust of gravity settling chamber 1 and is converted into solid dust, and the flue dust temperature that flows to the Low Temperature Storage hot cell remains on 800 ℃ of left and right.Fig. 2 dotted line represents to cut off the withdraw from service pipeline.In the Low Temperature Storage hot cell, each heat exchange point satisfies flue-gas temperature higher than the ball particle surface temperature, and the flue gas heat release is to ball particle.Along with the carrying out of diabatic process, the ball particle temperature raises gradually, and the exhanst gas outlet temperature raises gradually, and spherical ceramic particles accumulation of heat effect dies down.Flue gas is with the empty bed of 5-6 mark m/s() speed flows through the variole granulosa, considers that ball particle layer resistance loss ball particle layer height remains on the 1m left and right, and smoke gas flow is crossed variole granulosa time actual value 0.5～1.5 second scope.In high-temperature regenerator, each heat exchange point satisfies air themperature lower than the ball particle surface temperature, and the ball particle heat release is to air.Along with the carrying out of diabatic process, the ball particle temperature reduces gradually, and air exit temp reduces gradually, and the effect of ball particle preheated air diminishes.Air is with the empty bed of 5-6 mark m/s() speed flows through the variole granulosa, consider that ball particle layer resistance loss ball particle layer height remains on the 1m left and right, air flows through variole granulosa time actual value 0.5～1.5 second scope, has realized flue gas rapid cooling and air rapid warm.Regenerator 3 Ceramic Balls sphere diameters are little, and specific area is greater than 800m
2/ m
3The exhanst gas outlet temperature was reduced to 150 ℃ in 0.5 ~ 1.5 second, air exit temp is corresponding is elevated to 600～700 ℃, and flue gas cooling and air rapid warm process rapidly can only continue 60～120 seconds.For guaranteeing flue gas rapid cooling effect, air pipe line and flue gas pipeline switching cycle are set to 60～120 seconds.Under the motor rotary action, two regenerator are along horizontal axis quick rotation separately, the smoke entrance in Low Temperature Storage hot cell, Fig. 2 below is blocked naturally, air ports is opened (see figure 3) naturally, and the high-temperature regenerator (see figure 3) of rapid warm air is changed in the Low Temperature Storage hot cell by original chilling flue gas; The air ports of Fig. 2 top high-temperature regenerator is blocked naturally, smoke entrance is opened (see figure 3) naturally, high-temperature regenerator is changed into Low Temperature Storage hot cell (see figure 3), air and the flue gas pipeline switching (as shown in Figure 3) of chilling flue gas by original rapid warm air.Fig. 3 dotted line represents to cut off the withdraw from service pipeline.After 60～120 seconds, motor rotates, and air pipe line and flue gas pipeline return to again Fig. 2 state, reach fast-cooling continuous flue gas and rapid warm air effect by the periodic rotary method like this.
The technology of the present invention feature and corresponding technique effect thereof are described in detail as follows:
The present invention has multiple technical characterictics such as " two sections dedustings, multistage dedusting and dry method dusts ", and the technique effect that these technical characterictics bring is that the exhaust gas dust discharging reaches " dangerous waste incineration pollution control criterion " (GB18484-2001) requirement.Two sections dedustings relate to high-temperature dust removal and low temperature dedusting.2 li in gravity settling chamber 1 and cyclone dust removal chamber of flue dust (containing toxic organic exhaust gas) are removed whole coarse granules and most of thin dirt, and 7 li are removed the thin dirt of residue in the bag-type dust chamber.
The present invention has " high-specific surface area heat-accumulating heat-transfer " technical characterictic, this technical characterictic has brought three technique effects: realize the flue gas chilling, avoid and shorten flue gas in synthesis temperature 250 ~ 800 ℃ of times of zone, avoid occuring bioxin synthetic phenomenon again in flue gas purification system; Realize high-temperature preheated air, organize furnace high-temperature burning, guarantee the incinerator hot operation require (ignition temperature〉1000 ℃, the exhaust combustion temperature〉1200 ℃), avoid bioxin to generate from the source.The flue gas dioxin discharging reaches " dangerous waste incineration pollution control criterion " (GB18484-2001) requirement, and in addition, more than 850 ℃, temperature is burned the solid carbon compound, can not form the black smoke of incomplete combustion.Improve process economy, constant temperature hot operation condition has been avoided additional energy source consumption.Flue gas flow through the variole granulosa in 0.5～2 second, two regenerator air pipe lines and flue gas pipeline switching cycle are 60～120 seconds, had realized the flue gas rapid cooling and had guaranteed stability and the continuation of flue gas quenching process." two high-specific surface area heat-accumulating heat-transfers coordinate operation " of Invention Announce is the third flue gas quick cooling method except conventional smoke gas blowout water quick cooling and dilution air chilling, and particularly suitable and economical and energy saving cleaning are disposed the danger wastes incineration flue gas and used.
The present invention has " the high-specific surface area heat-accumulating heat-transfer is arranged between two sections dedustings and carries out " technical characterictic, and the technique effect that this technical characterictic brings is security, stability and the reliability that improves Di bioxin and dust emission in gas cleaning.The low temperature dedusting of bag-type dust chamber 7 is important guarantees of exhaust gas dust emission compliance.2 li in gravity settling chamber 1 and cyclone dust removal chamber of flue dust are removed whole coarse granules and most of thin dirt, guarantee that 3 li of two regenerator occur without too much dust accumulation and plugging fault, realize that the flue gas chilling is stablized to carry out.Gravity settling chamber 1 and cyclone dust removal chamber 2 liner flame-proof thermal insulation materials, function of environment heat emission is few, and it is without significant hypothermal that flue dust flows through cyclone dust removal chamber 2, avoids gravity settling chamber 1 and cyclone dust removal 2 li of chambers flue dust temperature to be in bioxin synthesis temperature scope again.Two regenerator 3 realize the flue gas chilling, have both avoided the flue gas cooling device of traditional flue gas purifying technique complexity, save space with the space and improve the process economics performance, avoid again the accidents such as cloth bag burns to occur, and guarantee bag-type dust chamber 7 safe operations.
The present invention is applicable to high temperature, high dust-laden and contains organic murder by poisoning gas gas cleaning use, and is applicable to all kinds of danger wastes incineration flue gas place uses such as waste printed circuit board, flammable industrial copper-bearing waste material, medical waste flue gas.
Energy-conserving and environment-protective of the present invention and remarkable economic and social benefits.After using the present invention, " dangerous waste incineration pollution control criterion " (GB18484-2001) requirement is satisfied in the toxic pollutant emissions such as waste printed circuit board incineration tail gas Zhong bioxin and dust, dispose and the secondary pollution generation without extra waste liquid, without additional energy source consumption.
Above-described embodiment is a kind of better scheme of the present invention, is not that the present invention is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (6)
1. system for purifying flue gas produced by waste circuit board burning, it is characterized in that: described system for purifying flue gas produced by waste circuit board burning comprises the gravity settling chamber (1) that connects successively by pipeline, cyclone dust removal chamber (2), regenerator (3), HTHP air-introduced machine (5), lime stone winding-up chamber (6) and bag-type dust chamber (7), gravity settling chamber (1), cyclone dust removal chamber (2), regenerator (3), HTHP air-introduced machine (5), lime stone winding-up chamber (6) and bag-type dust chamber (7) consist of flue gas pipeline, the input of gravity settling chamber (1) is connected by the exhaust opening of pipeline with incinerator (9), the output of bag-type dust chamber (7) is connected by the air inlet of pipeline with Environment protection chimney (10), described regenerator (3) is upper is connected with high pressure blower (4) by pipeline, regenerator (3) also is connected by the air inlet of pipeline with incinerator (9), high pressure blower (4), regenerator (3) and the pipeline formation air pipe line that connects regenerator (3) and incinerator (9) air inlet,
Described regenerator (3) is horizontal type structure, regenerator is connected with motor on (3), regenerator (3) can periodic rotary be to switch flue gas pipeline and air pipe line under the Motor Drive effect along the own level axis, and the rotation period of regenerator (3) is 60 ~ 120 seconds;
Regenerator is provided with the spherical ceramic particles layer in (3), the spherical ceramic particles layer by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form, regenerator (3) arranges in pairs, regenerator (3) is divided into Low Temperature Storage hot cell and high-temperature regenerator, Low Temperature Storage hot cell and high-temperature regenerator be co-conversion mutually along with the regenerator periodic rotary;
Thickness along air current flow direction spherical ceramic particles layer is 0.8 ~ 1.2m, and air or flue gas are 0.5 ~ 2 second by the time of spherical ceramic particles layer.
2. system for purifying flue gas produced by waste circuit board burning according to claim 1 is characterized in that: the pipeline that connects bag-type dust chamber (7) and Environment protection chimney (10) is provided with pressure regulator valve (8).
3. system for purifying flue gas produced by waste circuit board burning according to claim 1 is characterized in that: described gravity settling chamber (1) is U-shaped or W shape.
4. system for purifying flue gas produced by waste circuit board burning according to claim 1, it is characterized in that: be equipped with import and outlet on Low Temperature Storage hot cell and high-temperature regenerator, import comprises air intlet and gas approach, outlet comprises air outlet slit and exhanst gas outlet, air intlet and air outlet slit are positioned on high-temperature regenerator, and gas approach and exhanst gas outlet are positioned on the Low Temperature Storage hot cell.
5. according to claim 1 and 2 or 3 described system for purifying flue gas produced by waste circuit board burnings, it is characterized in that: HTHP air-introduced machine (5) and high pressure blower (4) are equipped with two, and two HTHP air-introduced machines are in parallel, two high pressure blower parallel connections.
6. according to claim 1 and 2 or 3 described system for purifying flue gas produced by waste circuit board burnings, is characterized in that: be provided with refractory insulating layer in gravity settling chamber (1) and cyclone dust removal chamber (2).
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| CN 201110204461 CN102350160B (en) | 2011-07-21 | 2011-07-21 | System for purifying flue gas produced by waste circuit board burning |
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| CN 201110204461 CN102350160B (en) | 2011-07-21 | 2011-07-21 | System for purifying flue gas produced by waste circuit board burning |
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| CN102350160B true CN102350160B (en) | 2013-11-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673643B (en) * | 2013-11-22 | 2015-06-17 | 宝钢集团广东韶关钢铁有限公司 | High-temperature flue gas waste heat recovery and dust extraction all-in-one device |
| CN104180382A (en) * | 2014-09-11 | 2014-12-03 | 中南大学 | Flue gas dry method quenching system |
| CN104451155B (en) * | 2014-11-21 | 2016-08-31 | 天津闪速炼铁技术有限公司 | Processing method containing organic waste metal |
| CN104480311B (en) * | 2014-11-21 | 2017-05-17 | 天津闪速炼铁技术有限公司 | Method for separating metal and organic matters |
| CN106838941A (en) * | 2017-03-15 | 2017-06-13 | 林景峰 | Convenient energy-saving type burned waste gas device |
| CN107246619B (en) * | 2017-07-18 | 2019-07-09 | 广西科穗环境科技有限公司 | The dust pelletizing system of biomass boiler |
| CN111530216A (en) * | 2020-06-12 | 2020-08-14 | 中冶赛迪技术研究中心有限公司 | Flue gas quenching and dust removing device for inhibiting dioxin regeneration and control method |
| CN113797728B (en) * | 2021-09-30 | 2024-05-10 | 灌南县同益金属有限公司 | Treatment method for generating smoke in valuable secondary material treatment process |
| CN114653156A (en) * | 2022-03-18 | 2022-06-24 | 北京双吉制药有限公司 | Pharmacy workshop exhaust treatment system |
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| CN1869569A (en) * | 2006-06-22 | 2006-11-29 | 无锡市东方环境工程设计研究所有限公司 | Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology |
| CN101825284A (en) * | 2010-05-14 | 2010-09-08 | 吴道洪 | Municipal solid waste heat accumulating type gasification and melting incineration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1869569A (en) * | 2006-06-22 | 2006-11-29 | 无锡市东方环境工程设计研究所有限公司 | Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology |
| CN101825284A (en) * | 2010-05-14 | 2010-09-08 | 吴道洪 | Municipal solid waste heat accumulating type gasification and melting incineration system |
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