CN102350160A - 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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- CN102350160A CN102350160A CN2011102044617A CN201110204461A CN102350160A CN 102350160 A CN102350160 A CN 102350160A CN 2011102044617 A CN2011102044617 A CN 2011102044617A CN 201110204461 A CN201110204461 A CN 201110204461A CN 102350160 A CN102350160 A CN 102350160A
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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, the waste printed circuit board incineration flue gas system of particularly a kind of integrated high-specific surface area ceramic heat-storing heat transfer and segmentation dry dedusting technology.
Background technology
Waste printed circuit board is made up of glass fiber-reinforced resin, plastics and multiple metal, also contains poisonous brominated flame retardant.At present, one of waste printed circuit board disposal common methods is a burning disposal.Because the debirs incomplete combustion, give off a large amount of stimulation foul waste gas and contain the poisonous fume of Polychlorinated biphenyls/bioxin in a large number.Waste printed circuit board is disposed in economic environmental protection becomes global environmental protection focus.Research and development bioxin and dust emission waste printed circuit board incineration flue gas technology up to standard meet national circular economy policy and " 12 " national economic development requirement, can promote sustainable economic development and " amphitypy " social construction.
The waste printed circuit board incineration flue gas contains toxic composition, and suppressing bioxin synthetic once more is the gas cleaning emphasis, and the high dustiness of flue-gas temperature is big in addition, and gas cleaning also requires high-effective dust-removing and high efficiente callback fume afterheat.Just suppress the synthetic once more aspect of bioxin, the flue gas quench cooled is a most effectual way of avoiding bioxin synthetic once more.The flue gas organic poison can regenerate bioxin when flue gas slowly was cooled to 300 ~ 500 ℃ of left and right sides, so the uniformity conclusion is that flue gas is quenched to and is lower than 300 ~ 250 ℃ and following temperature in 1 ~ 2 second.Conventional smoke cooling method out of breath is direct injection air or a water in flue gas, and flue-gas temperature is reduced to (even to 82 ℃) below 250 ℃ rapidly.Directly spray water in the flue gas, can absorb dust, also can be corroded to prevent aftertreatment device by the absorption portion acidic materials, yet the processing of waste liquid can increase operating cost after handling.Mix a large amount of cold airs in the flue gas, can increase flue gas volume and follow-up equipment gas cleaning load, reduce process economy.The just conventional fume afterheat aspect that reclaims reclaims fume afterheat and can improve process economy in the flue gas cool-down process.Reclaiming the fume afterheat 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 big 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.With normally cooling or the shower water reinforcement cooling naturally of cools down flue gas, because of heat exchange coefficient is not high, the cools down area is big, and is less economical, and the flue gas stroke is long, cool time long (>>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 also are common cleaners, have normally removed the most dust in the flue gas cooled flue gas time.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 handled high-temperature smoke, and shaped Venturi dedusting is wet dust removal (needing the toxic waste water of extra process), and electrostatic precipitation can only be handled the flue dust about 400 ℃, and bag-type dust efficient is high, but go into < 200 ℃ of bag flue dust temperature palpuses.Integrated augmentation of heat transfer and high-effective dust-removing technology, developing the danger wastes incineration flue gas technology that can realize flue gas quench cooled, high-effective dust-removing, high efficiente callback fume afterheat and economic security operation is danger wastes disposal of resources industrialization promotion key application.
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 800-900 ℃ high-temperature flue gas; 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 mineral waste 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 in the conduction oil circulatory system, circulate heating spent organic solvent and the animal and plant grease that gives up of conduction oil refine 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 the mud after the heating that rotary kiln is discharged; Copper, nickel metal are present in the 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 deposition of ion exchange chemical reaction generation is also sent into curing apparatus, mixes with aforesaid mud and further processes various construction materials; The tail gas that rotary kiln is discharged imports exhaust treatment system, is discharged to chimney through smoke exhaust fan then.Though this 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 once more, and the more problem of dust, effectively flue.
Summary of the invention
The objective of the invention is to overcome debirs incineration flue gas water spray chilling needs the extra process waste liquid and mixes cold air reduction process economy; Waste heat boiler or heat exchanger flue gas slowly cooling have impelled shortcomings such as flue gas Zhong bioxin synthesizes once more; A kind of waste printed circuit board incineration flue gas system is provided; 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 the processing are up to standard, do not have 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 waste printed circuit board incineration flue gas system; Described waste printed circuit board incineration flue gas system comprises the gravity settling chamber that connects successively through 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 constitute flue gas pipeline; The input of gravity settling chamber is connected with the exhaust opening of incinerator through pipeline; The output of bag-type dust chamber is connected with the air inlet of Environment protection chimney through pipeline; Be connected with high pressure blower through pipeline on the described regenerator; Regenerator also is connected high pressure blower through pipeline with the air inlet of incinerator; 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, avoid and shorten flue gas in synthesis temperature zone 800 ~ 250 ℃ of times, avoid in flue gas purification system, taking place the synthetic once more phenomenon of bioxin; Air pipe line is realized high-temperature preheated air, organizes the 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, in the bag-type dust chamber, be removed the fine dirt of residue.The particle that flows to the bag-type dust chamber is fine grained and subparticle, has influenced bag-type dust chamber efficiency of dust collection.In order to overcome the not high problem of bag-type dust chamber efficient that the classification dedusting brings; Be provided with lime stone winding-up chamber before in the bag-type dust chamber; Unequigranular limestone particle sprays into lime stone winding-up chamber; Limestone particle and flue gas mix in lime stone winding-up chamber; In with flue gas in sour 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 and sprays into wet dedusting technology such as cold water, shaped Venturi dedusting, washing, does not have extra water source and uses, and avoids gas cleaning process secondary waste water pollution problem, has avoided pipeline acid corrosion problem, has prolonged flue gas purification system service life.
Regenerator can realize the high-specific surface area heat-accumulating heat-transfer, thereby realizes flue gas chilling (in flue gas pipeline, working), avoids and shortens flue gas in synthesis temperature 250 ℃ ~ 800 times of zone, avoids in flue gas purification system, taking place the synthetic once more phenomenon of bioxin; Also realize high-temperature preheated air (in air pipe line, working) simultaneously, 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, temperature is burned the solid carbon compound more than 850 ℃, 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 the back 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, security, stability and the reliability of Di bioxin and dust emission in this raising gas cleaning.The low temperature dedusting of bag-type dust chamber is the important assurance 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 no too much dust accumulation and plugging fault generation in the regenerator, stable the carrying out of realization flue gas chilling.Two regenerator 3 realize the flue gas chillings, have both avoided the complicated flue gas cooling device of traditional flue gas purifying technique, save space with the space and improve the process economics performance, avoid accidents such as cloth bag burns to occur again, guarantee 7 safe operations of bag-type dust chamber.
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 control flue gas purification system drag losses and incinerator combustion chamber draft value, accomplishes that smoke evacuation is smooth.
As preferably, said 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 taking place in the low-temperature heat accumulating chamber dust.
As preferably, said regenerator is a horizontal type structure, is connected with motor on the regenerator, and regenerator can periodic rotary be to switch flue gas pipeline and air pipe line under the motor driven effect along the own level axis, and the rotation period of regenerator is 60 ~ 120 seconds.Under motor driven; 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 the one-time investment expense and the day-to-day operation expense of process for purifying.
As preferably, be provided with the Ceramic Balls stratum granulosum in the regenerator, the Ceramic Balls stratum granulosum by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form, regenerator is provided with in pairs, regenerator is divided into low-temperature heat accumulating chamber and high-temperature heat accumulation chamber, low-temperature heat accumulating chamber and high-temperature heat accumulation chamber be co-conversion mutually along with the regenerator periodic rotary.
The thermal storage ceramic ball is a Ceramic Balls, and the Ceramic Balls ability is high temperature resistant, also ability 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 heat accumulating chamber, and violent gas-particle heat transfer takes place between flue gas and the low-temperature heat accumulating Ceramic Balls, and flue gas is given the low-temperature heat accumulating Ceramic Balls with sensible heat transfer.The normal temperature combustion air flows through from high-temperature heat accumulation Ceramic Balls gap, high-temperature heat accumulation chamber, and violent gas-particle heat transfer takes place between air and the 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 of low-temperature heat accumulating chamber has absorbed high-temperature flue gas becomes the high-temperature heat accumulation Ceramic Balls; The high-temperature heat accumulation Ceramic Balls of high-temperature heat accumulation chamber 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; The low-temperature heat accumulating chamber of simultaneously original flue gas pipeline has been transformed into the high-temperature heat accumulation chamber of air pipe line, and the high-temperature heat accumulation chamber of air pipe line has originally become the low-temperature heat accumulating chamber of original flue gas pipeline.
As preferably; Be equipped with import and outlet on low-temperature heat accumulating chamber and the high-temperature heat accumulation chamber, 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 the high-temperature heat accumulation chamber, and gas approach and exhanst gas outlet are positioned on the low-temperature heat accumulating chamber.Along with flue gas pipeline and air pipe line switch, low-temperature heat accumulating chamber and the change of high-temperature heat accumulation chamber, change also takes place 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 Ceramic Balls stratum granulosum, air or flue gas are 0.5 ~ 2 second through the time of Ceramic Balls stratum granulosum.Along the air current flow direction is import-Way out; 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 the stability and the continuation of flue gas quenching process.It is the third flue gas quick cooling method except that conventional smoke gas blowout water quick cooling and dilution air chilling that two high-specific surface area heat-accumulating heat-transfers of the present invention cooperate operation, 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, two HTHP air-introduced machines parallel connections, two high pressure blower parallel connections.HTHP air-introduced machine and high pressure blower are two parallel connections, and one is subsequent use, prevent that fortuitous event from taking place and influence 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, environment heat radiation is few, and flue dust flows through the cyclone dust removal chamber does not have significant hypothermal, avoids that the flue dust temperature is in bioxin synthesis temperature scope once more in gravity settling chamber and the cyclone dust removal chamber.
The invention has the beneficial effects as follows: 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 the processing are up to standard, do not have extra waste liquid disposal, energy-conserving and environment-protective, low cost.
Description of drawings
Fig. 1 is an agent structure sketch map 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.
Among the 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 representes to cut off the withdraw from service pipeline; Fig. 3 dotted line representes to cut off the withdraw from service pipeline.
The specific embodiment
Pass through specific embodiment below, and combine accompanying drawing, technical scheme of the present invention is further specified.
Embodiment:
As shown in Figure 1, a kind of waste printed circuit board incineration flue gas system 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 bag- type dust chamber 7 and 8, eight parts of 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 constitute flue gas pipeline; The input of gravity settling chamber 1 is connected with the exhaust opening of incinerator 9 through pipeline; The output of bag-type dust chamber 7 is connected with the air inlet of Environment protection chimney 10 through pipeline; Regenerator 3 also is connected with the air inlet of incinerator 9 through pipeline, 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 a 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 takes place, 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 a horizontal type structure, is connected with motor on the regenerator 3, and regenerator 3 can periodic rotary be to switch flue gas pipeline and air pipe line under the motor driven effect along the own level axis, and the rotation period of regenerator 3 is 60 ~ 120 seconds.Pile up along the air current flow direction in the regenerator 3 that to form thickness be the Ceramic Balls stratum granulosum of 1m, the Ceramic Balls stratum granulosum by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form; The thermal storage ceramic ball is a Ceramic Balls; Regenerator 3 is provided with in pairs; Regenerator 3 is divided into low-temperature heat accumulating chamber and high-temperature heat accumulation chamber; Periodically absorb obvious heat of smoke and warm-up combustion-supporting air; Air and flue gas are 0.5 ~ 2 second through the time of variole granulosa, and low-temperature heat accumulating chamber and high-temperature heat accumulation chamber be co-conversion mutually along with regenerator 3 periodic rotary.Be equipped with import and outlet on low-temperature heat accumulating chamber and the high-temperature heat accumulation chamber; Import comprises air intlet and gas approach; Outlet comprises that air outlet slit and exhanst gas outlet, air intlet and air outlet slit are positioned on the high-temperature heat accumulation chamber, and gas approach and exhanst gas outlet are positioned on the low-temperature heat accumulating chamber.High pressure blower 4 draws machine 5 with HTHP and is two parallel connections, and one is equipped with a usefulness.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; The cyclone dust removal chamber 2 of flowing through successively then; The low-temperature heat accumulating chamber; HTHP air-introduced machine 5; Lime stone winding-up chamber 6, bag-type dust chamber 7 and pressure regulator valve 8 are after the C point gets into Environment protection chimney; Under high pressure blower 4 motive force effects, combustion air flows to the high-temperature heat accumulation chamber from the D point, after in the E point entering incinerator.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 take place to avoid taking place in the low-temperature heat accumulating chamber dust.In order to overcome the not high problem of bag-type dust chamber 7 efficient that the classification dedusting brings; Be provided with lime stone winding-up chamber 6 before 7 in the bag-type dust chamber; Unequigranular limestone particle sprays into lime stone winding-up chamber 6 from the B point; Mix at lime stone winding-up 6 li limestone particles in chamber and flue gas; In with flue gas in sour 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 promptly flue and air duct switching cycle are 60～120 seconds.High-temperature flue gas flows into the low-temperature heat accumulating chamber and during 0.5 ~ 2 second time, discharged sensible heat and cools to below 250 ℃ from 800 ℃, and air blasts the high-temperature heat accumulation chamber and absorbs heat rapidly and is warmed up to 600～700 ℃.After high-temperature preheated air flows to incinerator, high-temp combustion takes place in the incinerator, suppress the generation and the discharging of bioxin from the source.Two regenerator 3 are along self axis periodic rotary; Realized the switching conversion of air pipe line and flue gas pipeline expediently; Avoid the use of high temperature transfer valve, simplified the flue gas purification system design, saved the 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); The cyclone dust removal chamber 2 of flowing through successively then; Low-temperature heat accumulating chamber (regenerator of below among Fig. 2), HTHP air-introduced machine 5, lime stone winding-up chamber 6; Bag-type dust chamber 7 and pressure regulator valve 8 are after the C point gets into Environment protection chimney 10; Under high pressure blower 4 motive force effects, combustion air flows to high-temperature heat accumulation chamber (Fig. 2 top regenerator) from the D point, after E point (air inlet of incinerator 9) spray in the incinerator 9.
A point flue dust temperature is 1000～1200 ℃, and flue dust flows through gravity settling chamber 1 back dust and is converted into solid dust, and the flue dust temperature that flows to the low-temperature heat accumulating chamber remains on about 800 ℃.Fig. 2 dotted line representes to cut off the withdraw from service pipeline.Each heat exchange point all satisfies flue-gas temperature and is higher than the ball particle surface temperature in the low-temperature heat accumulating chamber, and ball particle is given in the flue gas heat release.Along with the carrying out of diabatic process, the ball particle temperature raises gradually, and the exhanst gas outlet temperature raises gradually, and Ceramic Balls particle accumulation of heat effect dies down.Flue gas is marked m/s (empty bed) velocity flow with 5-6 and is crossed the variole granulosa, considers that ball particle layer resistance loss ball particle layer height remains on about 1m, and flue gas flows through variole granulosa time actual value 0.5～1.5 second scope.Each heat exchange point all satisfies air themperature and is lower than the ball particle surface temperature in the high-temperature heat accumulation chamber, and air is given in the ball particle heat release.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 marked m/s (empty bed) velocity flow with 5-6 and is crossed the variole granulosa; Consider that ball particle layer resistance loss ball particle layer height remains on about 1m; 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 to be elevated to 600～700 ℃, and flue gas quench cooled and air rapid warm process 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 edge is the horizontal axis quick rotation separately; The smoke entrance of low-temperature heat accumulating chamber, Fig. 2 below is blocked naturally; Air ports is opened (see figure 3) naturally, and the high-temperature heat accumulation chamber (see figure 3) of rapid warm air is changed in the low-temperature heat accumulating chamber by original chilling flue gas; The air ports of high-temperature heat accumulation chamber, Fig. 2 top is blocked naturally; Smoke entrance is opened (see figure 3) naturally; Low-temperature heat accumulating chamber (see figure 3), air and the flue gas pipeline switching (as shown in Figure 3) of chilling flue gas changed in the high-temperature heat accumulation chamber by original rapid warm air.Fig. 3 dotted line representes to cut off the withdraw from service pipeline.After 60～120 seconds, motor rotates, and air pipe line and flue gas pipeline return to Fig. 2 state again, reach fast-cooling continuous flue gas and rapid warm air effect through the periodic rotary method like this.
Technical characterictic of the present invention and corresponding techniques 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.Flue dust (containing toxic organic exhaust gas) is removed whole coarse granules and most of thin dirt for 2 li in gravity settling chamber 1 and cyclone dust removal chamber, 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 zone 250 ~ 800 ℃ of times, avoid in flue gas purification system, taking place the synthetic once more phenomenon of bioxin; Realize high-temperature preheated air, organize the 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, temperature is burned the solid carbon compound more than 850 ℃, 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 the stability and the continuation of flue gas quenching process." two high-specific surface area heat-accumulating heat-transfers cooperate operation " of Invention Announce is the third flue gas quick cooling method except that 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 the gas cleaning.The low temperature dedusting of bag-type dust chamber 7 is important assurances of exhaust gas dust emission compliance.Flue dust is removed whole coarse granules and most of thin dirt for 2 li in gravity settling chamber 1 and cyclone dust removal chamber, guarantees that stable the carrying out of realization flue gas chilling taken place for 3 li no too much dust accumulation of two regenerator and plugging fault.Gravity settling chamber 1 and cyclone dust removal chamber 2 liner flame-proof thermal insulation materials, the environment heat radiation is few, and it is no significant hypothermals that flue dust flows through cyclone dust removal chamber 2, avoids gravity settling chamber 1 and the 2 li flue dust temperature in cyclone dust removal chamber to be in bioxin synthesis temperature scope once more.Two regenerator 3 realize the flue gas chillings, have both avoided the complicated flue gas cooling device of traditional flue gas purifying technique, save space with the space and improve the process economics performance, avoid accidents such as cloth bag burns to occur again, guarantee 7 safe operations of bag-type dust chamber.
The present invention is applicable to high temperature, high dust-laden and contains organic murder by poisoning gas gas cleaning and use, is applicable to all kinds of danger wastes incineration flue gas places 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 toxic pollutant emissions such as waste printed circuit board incineration tail gas Zhong bioxin and dust, does not have extra waste liquid disposal and secondary pollution no additional energy source consumption takes place.
Above-described embodiment is a kind of preferable scheme of the present invention, is not that the present invention is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (9)
1. waste printed circuit board incineration flue gas system; It is characterized in that: described waste printed circuit board incineration flue gas system comprises the gravity settling chamber (1) that connects successively through 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) constitute flue gas pipeline; The input of gravity settling chamber (1) is connected with the exhaust opening of incinerator (9) through pipeline; The output of bag-type dust chamber (7) is connected with the air inlet of Environment protection chimney (10) through pipeline; Described regenerator (3) goes up and is connected with high pressure blower (4) through pipeline; Regenerator (3) also is connected high pressure blower (4) through pipeline with the air inlet of incinerator (9); Regenerator (3) and the pipeline formation air pipe line that connects regenerator (3) and incinerator (9) air inlet.
2. waste printed circuit board incineration flue gas according to claim 1 system 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. waste printed circuit board incineration flue gas according to claim 1 system is characterized in that: said gravity settling chamber (1) is U-shaped or W shape.
4. according to claim 1 or 2 or 3 described waste printed circuit board incineration flue gas systems; It is characterized in that: said 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 driven effect along the own level axis, and the rotation period of regenerator (3) is 60 ~ 120 seconds.
5. waste printed circuit board incineration flue gas according to claim 4 system, it is characterized in that: regenerator is provided with the Ceramic Balls stratum granulosum in (3), the Ceramic Balls stratum granulosum by some specific areas greater than 800m
2/ m
3The thermal storage ceramic ball form, regenerator (3) is provided with in pairs, regenerator (3) is divided into low-temperature heat accumulating chamber and high-temperature heat accumulation chamber, low-temperature heat accumulating chamber and high-temperature heat accumulation chamber be co-conversion mutually along with the regenerator periodic rotary.
6. waste printed circuit board incineration flue gas according to claim 5 system; It is characterized in that: be equipped with import and outlet on low-temperature heat accumulating chamber and the high-temperature heat accumulation chamber; 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 the high-temperature heat accumulation chamber, and gas approach and exhanst gas outlet are positioned on the low-temperature heat accumulating chamber.
7. waste printed circuit board incineration flue gas according to claim 5 system, it is characterized in that: the thickness along air current flow direction Ceramic Balls stratum granulosum is 0.8 ~ 1.2m, air or flue gas are 0.5 ~ 2 second through the time of Ceramic Balls stratum granulosum.
8. according to claim 1 or 2 or 3 described waste printed circuit board incineration flue gas systems, it is characterized in that: HTHP air-introduced machine (5) and high pressure blower (4) are equipped with two, two HTHP air-introduced machines parallel connections, two high pressure blower parallel connections.
9. according to claim 1 or 2 or 3 described waste printed circuit board incineration flue gas systems, it 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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| Application Number | Priority Date | Filing Date | Title |
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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 CN102350160B (en) | 2013-11-06 |
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| CN103673643A (en) * | 2013-11-22 | 2014-03-26 | 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 |
| CN104480311A (en) * | 2014-11-21 | 2015-04-01 | 邱江波 | Method for separating metal and organic matters |
| 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 |
| CN106838941A (en) * | 2017-03-15 | 2017-06-13 | 林景峰 | Convenient energy-saving type burned waste gas device |
| CN107246619A (en) * | 2017-07-18 | 2017-10-13 | 广西科穗环境科技有限公司 | The dust pelletizing system of biomass boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673643A (en) * | 2013-11-22 | 2014-03-26 | 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 |
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| CN104480311A (en) * | 2014-11-21 | 2015-04-01 | 邱江波 | Method for separating metal and organic matters |
| 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 |
| CN107246619A (en) * | 2017-07-18 | 2017-10-13 | 广西科穗环境科技有限公司 | The dust pelletizing system of biomass boiler |
| 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 |
| CN113797728A (en) * | 2021-09-30 | 2021-12-17 | 灌南县同益金属有限公司 | Treatment method for smoke generated in valuable secondary material treatment process |
| 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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| CN102350160B (en) | 2013-11-06 |
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