CN105485911A - VOC gas combustion-supporting coal-fired heat conduction oil furnace - Google Patents
VOC gas combustion-supporting coal-fired heat conduction oil furnace Download PDFInfo
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- CN105485911A CN105485911A CN201511024169.1A CN201511024169A CN105485911A CN 105485911 A CN105485911 A CN 105485911A CN 201511024169 A CN201511024169 A CN 201511024169A CN 105485911 A CN105485911 A CN 105485911A
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- 239000003245 coal Substances 0.000 claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000002309 gasification Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 212
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 61
- 239000003546 flue gas Substances 0.000 claims description 61
- 239000008246 gaseous mixture Substances 0.000 claims description 59
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 235000019504 cigarettes Nutrition 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 11
- 239000003818 cinder Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 239000003034 coal gas Substances 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000012855 volatile organic compound Substances 0.000 description 154
- 238000000034 method Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 206010019233 Headaches Diseases 0.000 description 1
- 208000010513 Stupor Diseases 0.000 description 1
- 206010047700 Vomiting Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000133 brain stem Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0275—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel
- F24H7/0291—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using solid fuel the transfer fluid being water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combustion Of Fluid Fuel (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a VOC gas combustion-supporting coal-fired heat conduction oil furnace which comprises a furnace body. A hearth used for heating heat conduction oil is arranged in the furnace body. A heat exchange coiled pipe is arranged in the hearth. Heat conduction oil flowing through the heat exchange coiled pipe is heated in the hearth. A chain grate stoker is arranged at the bottom of the hearth and used for conveying coal briquettes into the hearth to be combusted. A smoke pipeline is connected to a first smoke outlet of the furnace body and used for discharging smoke out of a chimney. The coal-fired heat conduction oil furnace further comprises a first mixer, a gas generator and at least one combustor. A second smoke outlet is formed in the furnace body. The first mixer comprises a high-temperature smoke inlet, a first VOC mixed gas inlet and an air and smoke mixed gas outlet. The second smoke outlet is communicated with the high-temperature smoke inlet of the first mixer. The air and smoke mixed gas outlet of the first mixer is communicated with a gasification agent inlet of the gas generator. A gas outlet of the gas generator is connected with at least one combustor through a gas pipeline.
Description
Technical field
The present invention relates to a kind of thermal hardware, particularly a kind of heat-conducting oil furnace.
Background technology
VOC is the english abbreviation of VOC (volatileorganiccompounds).VOC has tremendous influence to health, when the VOC in air reaches finite concentration, in short time, people can feel headache, Nausea and vomiting, weak etc., tic, stupor is there will be time serious, and the liver of people, kidney, brain and nervous system can be hurt, cause the serious consequences such as failure of memory.
For Furniture manufacturing industry, furniture needs to carry out drying and processing after spray paint/coating, this process will produce a large amount of high concentration VOC gaseous mixtures, if this waste gas is directly disposed in environment, not only can cause great destruction to environment, and the combustible component in VOC gaseous mixture also can not get recycling.
Be discharged in environment after normally adopting special combustor to carry out high-temp combustion decomposition VOC gaseous mixture in prior art, this not only adds the cost of process, and causes further energy waste again.
As Chinese patent discloses No. 203336605U a kind of high concentration/normal concentration VOC gas treatment equipment disclosed, it comprises blower fan, filter and burner that VOC main pipe rail sets gradually from front to back, VOC main pipe rail to comprise before VOC pipeline after pipeline and VOC, before VOC, pipeline is arranged between blower fan and filter, after VOC, pipeline is arranged between filter and burner, burner comprises the heat-exchanging chamber of bottom and the main catalytic room at top, and the rear portion of burner is connected with gas discharging main pipe rail up to standard.
And for example Chinese patent discloses No. 203336608U a kind of low concentration VOC gas treatment equipment disclosed, it comprises blower fan, activated carbon trap and burner from front to back successively, low concentration VOC pipeline is connected with between blower fan and activated carbon trap, low concentration VOC pipeline is also provided with filter, normal concentration VOC pipeline is connected with between activated carbon trap and burner, burner comprises the heat-exchanging chamber of bottom and the main catalytic room at top, and the rear portion of burner is connected with gas discharging main pipe rail up to standard.
Therefore, a kind of VOC gaseous mixture of can recycling is provided also the boiler combustion system of VOC harmless treatment can be become urgent problem in the industry as assisted gas.
Summary of the invention
The object of this invention is to provide the coal-fired thermal oil furnace that a kind of VOC gas is combustion-supporting, it can realize the process of VOC gas harmless when not wasting additional energy source.
According to an aspect of the present invention, the coal-fired thermal oil furnace that a kind of VOC gas is combustion-supporting being provided, comprising: body of heater, in body of heater, being provided with the burner hearth for heating conduction oil; Heat exchange coil, heat exchange coil is arranged in burner hearth, and the conduction oil flowing through heat exchange coil is heated in burner hearth; Traveling-grate stoker, traveling-grate stoker is located at the bottom of burner hearth for coal cinder is delivered to burner hearth combustion.Flue is connected to the first exhanst gas outlet of body of heater, for flue gas is expelled to chimney.The combustion-supporting coal-fired thermal oil furnace of this VOC gas also comprises the first blender, gas producer and is located at least one burner on the sidewall of body of heater, and body of heater is provided with further the second exhanst gas outlet be communicated with burner hearth.Wherein, the first blender comprises high-temperature flue gas entry, a VOC gaseous mixture entrance and empty cigarette mixed gas outlet.Second exhanst gas outlet is communicated with the high-temperature flue gas entry of the first blender by flue gas arm, the empty cigarette mixed gas outlet of the first blender is communicated with the gasification agent inlet of gas producer by gasifying agent pipeline, being delivered to from the VOC gaseous mixture of the first blender and the mixed empty cigarette gaseous mixture of high-temperature flue gas in gas producer as gasifying agent and making contained VOC gas pyrolytic.The gas exit of gas producer to be connected to the heat release of burner hearth combustion, contained residual VOC gas combustion will be decomposed containing residual VOC gas injection by gas-pipe line with at least one burner.
Selectively, this coal-fired thermal oil furnace comprises the heat exchanger be located in flue further, heat exchanger comprises flue gas flow path and VOC gas flow path, carrys out the VOC gaseous mixture entrance being delivered to the first blender containing VOC gas flow after heat exchanger and flue gas heat exchange by VOC gas line of self-contained VOC gas source.
Wherein, warm smoke inlet and low-temperature flue gas outlet during the two ends of flue gas flow path are formed respectively, middle temperature smoke inlet is communicated with the first exhanst gas outlet of body of heater, and low-temperature flue gas exports and is connected to chimney.The two ends of VOC gas flow path form cold VOC gas access and hot VOC gas vent respectively, and cold VOC gas access is connected to containing VOC gas source, and hot VOC gas vent is communicated with a VOC gaseous mixture entrance of the first blender by VOC gas line.
Selectively, heat exchanger some heat pipes of comprising shell, housing interior volume being divided into the median septum of reverse parallel flue gas flow path and VOC gas flow path and being located in median septum.Wherein, the evaporation ends of some heat pipes extends in flue gas flow path, and the condensation end of some heat pipes extends in VOC gas flow path.
Selectively, the working medium in some heat pipes is the working medium such as the naphthalene being applicable to 500 degrees centigrade operating modes.
Selectively, heat exchanger also can adopt surface-type heat exchanger, that is, two kinds of fluids that temperature is different flow in the space separated by wall, by the heat conduction of wall and fluid in wall surface convection current, carries out heat exchange between two kinds of fluids.
Wherein, that carrys out self-contained VOC gas source is about 20 ~ 25 degrees Celsius containing VOC gas temperature.The VOC gas temperature that contains after heat exchanger and flue gas heat exchange is about 180 ~ 250 degrees Celsius.Enter warm flue-gas temperature in heat exchanger by the first exhanst gas outlet to be about 400 ~ 500 degrees Celsius, to account for 50 ~ 70% of total flue gas volume amount.100 ~ 200 degrees Celsius are about with containing the low-temperature flue gas temperature of discharging after VOC gas converting heat through heat exchanger.Be about 800 ~ 1000 degrees Celsius by the high-temperature flue-gas in the second exhanst gas outlet injection to the first blender, account for 30 ~ 50% of total flue gas volume amount.The VOC mixture temperature that the empty cigarette mixed gas outlet of the first blender is delivered to gas producer is about 550 ~ 620 degrees Celsius, is about 15 ~ 20% with volume percent oxygen content.
Selectively, this coal-fired thermal oil furnace comprises the second blender be located in VOC gas line further, and the second blender comprises containing VOC gas access, air intake and VOC mixed gas outlet.Be communicated with the hot VOC gas vent of heat exchanger containing VOC gas access, air intake is connected to supplement air in VOC gas with the first blower fan, VOC mixed gas outlet is communicated with a VOC gaseous mixture entrance of the first blender.
Wherein, the air themperature entering the second blender via air intake is about 20 ~ 25 degrees Celsius.Temperature through the VOC gaseous mixture of the VOC mixed gas outlet of the second blender is about 180 ~ 220 degrees Celsius.
Selectively, this coal-fired thermal oil furnace comprises at least four first kind VOC gas service pipes further, one end of each first kind VOC gas service pipe is communicated with VOC gas line respectively, and the other end compartment of terrain of each first kind VOC gas service pipe is communicated with a part of VOC gaseous mixture from the second blender to be delivered to traveling-grate stoker combustion-supporting and contained VOC gas combustion is decomposed with the diapire of body of heater.
Selectively, this coal-fired thermal oil furnace comprises at least one Equations of The Second Kind VOC gas service pipe further, one end of each Equations of The Second Kind VOC gas service pipe is communicated with VOC gas line respectively, and the other end of each Equations of The Second Kind VOC gas service pipe is connected combustion-supporting and contained VOC gas combustion is decomposed a part of VOC gaseous mixture from the second blender to be delivered at least one burner respectively with at least one burner.
Selectively, this coal-fired thermal oil furnace comprises the coal bunker for supplying coal cinder on traveling-grate stoker that at least one chain driving wheel, at least one chain driven pulley and contiguous body of heater one end face are arranged further.Traveling-grate stoker is arranged to ring-type around at least one chain driving wheel and at least one chain driven pulley, makes traveling-grate stoker under the driving of at least one chain driving wheel, rotate to deliver the coal cinder from coal bunker to the heat release of burner hearth combustion.
Wherein, at least one burner comprises two burners be relatively arranged on the two side of body of heater, and each burner comprises burner shell, be located at the gas entry of burner shell one end wall, be located at the 2nd VOC gaseous mixture entrance of burner casing body sidewall, be located at the gas-jet tube that the flame export of the other end of burner shell and the end wall around gas entry from burner shell extend to burner shell inside.The endcapped of gas-jet tube and form some spray orifices on perisporium, make from gas producer containing residual VOC coal gas by some spray orifices be injected in burner shell with the VOC gaseous mixture mixed combustion entered via the 2nd VOC gaseous mixture entrance.
Selectively, the other end of each Equations of The Second Kind VOC gas service pipe is communicated with the 2nd VOC gaseous mixture entrance of each burner respectively.
Selectively, first blender comprises mixer case and is located at the induction tunnel in mixer case, one VOC gaseous mixture entrance is located at an end wall of mixer case, high-temperature flue gas entry is located at the sidewall of mixer case, empty cigarette mixed gas outlet is located at another end wall of mixer case, and induction tunnel extends around a VOC gaseous mixture entrance is inner from an end wall of mixer case to mixer case.
Preferably, on the longitudinal direction of the first blender, high-temperature flue gas entry is between the first VOC gaseous mixture entrance and the end of induction tunnel.
Preferably, the first blender comprise further be located at induction tunnel between end and another end wall of mixer case for strengthening the impeller of gas and vapor permeation.
Preferably, this coal-fired thermal oil furnace comprises the conveyer belt for carrying coal in gas producer further.
Selectively, conveyer belt simultaneously for supplementing coal in coal bunker.
Wherein, gas producer of the present invention refers to coal gasifier, is also gas generator, is stove coal being carried out fuel gas manufacture as vaporising fuel.The type of furnace of gas producer of the present invention includes but not limited to: UGI stove, lurgi gasifier, Winkler stove, De Shike stove or Dow Chemical coal gasifier.
In operation, the high-temperature flue gas (accounting for 30 ~ 50% of total flue gas volume amount) of about 800 ~ 1000 degrees Celsius directly from burner hearth is fully mixed with the VOC gaseous mixture of about 150 ~ 250 degrees Celsius from the second blender by injection to the first blender by the second exhanst gas outlet, and mixed empty cigarette gaseous mixture enters in gas producer as gasifying agent.From body of heater with the abundant heat exchange of conduction oil after about 400 ~ 500 degrees Celsius in warm flue gas (accounting for 50 ~ 70% of total flue gas volume amount) enter heat exchanger and VOC gas converting heat by the first exhanst gas outlet after become about 100 ~ 150 degrees Celsius of low-temperature flue gas and be expelled to chimney.
The invention has the beneficial effects as follows: (1), employing VOC gaseous mixture heat heat-conducting oil furnace as assisted gas, take full advantage of the combustible component in VOC gaseous mixture, realize energy conservation; (2), the process of VOC gas harmless is realized when not wasting additional energy source, special combustor is discharged in environment after need not be adopted to carry out high-temp combustion decomposition VOC gaseous mixture again, simplify the technique of process VOC gaseous mixture, save the cost of process; (3), to VOC gas adopt various ways to carry out multistage harmless treatment, make to be expelled in the flue gas in environment not containing VOC gas; (4) with the fume afterheat heating VOC gaseous mixture of body of heater, take full advantage of flue gas heat, reduce the flue-gas temperature that coal-fired thermal oil furnace is discharged, reduce the pollution to environment.
Accompanying drawing explanation
Fig. 1 shows the organigram of the combustion-supporting coal-fired thermal oil furnace of VOC gas of the present invention.
Fig. 2 shows the layout schematic diagram of body of heater of the present invention and burner.
Fig. 3 shows the organigram of the first blender that the present invention adopts.
Fig. 4 shows the organigram of the burner that the present invention adopts.
Detailed description of the invention
Please refer to Fig. 1, according to one embodiment of the present invention, the combustion-supporting coal-fired thermal oil furnace of VOC gas comprises: body of heater 100, first blender 200, gas producer 300, two burners 400 be located on the sidewall of body of heater 100, heat exchanger 500 and the second blender 600.
Be provided with the burner hearth (not shown) for heating conduction oil in body of heater 100, heat exchange coil (not shown) is arranged in burner hearth, and the conduction oil flowing through heat exchange coil is heated in burner hearth.Traveling-grate stoker 120 is located at the bottom of burner hearth for coal cinder 121 is delivered to burner hearth combustion.The second exhanst gas outlet 140 that body of heater 100 is provided with the first exhanst gas outlet 130 and is communicated with burner hearth.First exhanst gas outlet 130 of body of heater 100 connects flue 150 and flue gas is expelled to chimney (not shown).
As shown in Figure 3, the first blender 200 comprises mixer case 240 and is located at the induction tunnel 250 in mixer case 240.One VOC gaseous mixture entrance 230 is located at an end wall 241 of mixer case 240, and high-temperature flue gas entry 210 is located at the sidewall of mixer case 240, and empty cigarette mixed gas outlet 220 is located at another end wall 242 of mixer case 240.Induction tunnel 250 extends around a VOC gaseous mixture entrance 230 is inner from an end wall 241 of mixer case 240 to mixer case 240, on the longitudinal direction of the first blender 200, high-temperature flue gas entry 210 is between the first VOC gaseous mixture entrance 230 and the end of induction tunnel 250.First blender 200 also comprise be located at induction tunnel 250 between end and another end wall 242 of mixer case 240 for strengthening the impeller 260 of gas and vapor permeation.
Second exhanst gas outlet 140 of body of heater 100 is communicated with the high-temperature flue gas entry 210 of the first blender 200 by flue gas arm (non-label).The empty cigarette mixed gas outlet 220 of the first blender 200 is communicated with the gasification agent inlet 310 of gas producer 300 by gasifying agent pipeline (non-label), so that by be delivered to from the VOC gaseous mixture of the first blender 200 and the mixed empty cigarette gaseous mixture of high-temperature flue gas, gas producer 300 is interior makes contained VOC gas pyrolytic as gasifying agent.The gas exit 320 of gas producer 300 is connected will remain VOC gas combustion contained by making decompose to the heat release of burner hearth combustion containing residual VOC gas injection by gas-pipe line (non-label) with two burners 400.
As shown in Figures 2 and 4, two burners 400 are relatively arranged on the two side of body of heater 100.Each burner 400 comprises burner shell 410, be located at the gas entry 420 of burner shell 410 1 end wall 411, be located at the 2nd VOC gaseous mixture entrance 430 of burner shell 410 sidewall, be located at the gas-jet tube 450 that the flame export 440 of the other end of burner shell 410 and the end wall 411 around gas entry 420 from burner shell 410 extend to burner shell 410 inside.The endcapped of gas-jet tube 450 and form some spray orifices 451 on perisporium, make from gas producer 300 containing residual VOC coal gas by some spray orifices 451 be injected in burner shell 410 with the VOC gaseous mixture mixed combustion entered via the 2nd VOC gaseous mixture entrance 430.
Heat exchanger 500 is arranged in flue 150, and heat exchanger 500 comprises flue gas flow path (not shown) and VOC gas flow path (not shown).Warm smoke inlet 510 and low-temperature flue gas outlet 520 during the two ends of flue gas flow path are formed respectively, middle temperature smoke inlet 510 is communicated with the first exhanst gas outlet 130 of body of heater 100, and low-temperature flue gas exports 520 and is connected to chimney.The two ends of VOC gas flow path form cold VOC gas access 530 and hot VOC gas vent 540 respectively, and cold VOC gas access 530 is connected to containing VOC gas source (not shown).Wherein, low-temperature flue gas outlet 520 is connected to the second blower fan 521 so that flue gas is pumped to chimney, and cold VOC gas access 530 is connected to the 3rd blower fan 531 so that VOC gas is pumped to heat exchanger 500 from containing VOC gas source.
Second blender 600 is arranged in VOC gas line, and the second blender 600 comprises containing VOC gas access 610, air intake 620 and VOC mixed gas outlet 630.Be communicated with the hot VOC gas vent 540 of heat exchanger 500 containing VOC gas access 610, air intake 620 is connected to supplement air in VOC gas with the first blower fan 621, VOC mixed gas outlet 630 is communicated with a VOC gaseous mixture entrance 230 of the first blender 200.
In this non-limiting embodiment, comprise four first kind VOC gas service pipes 700 and two Equations of The Second Kind VOC gas service pipes 800 further.One end of each first kind VOC gas service pipe 700 is communicated with VOC gas line (non-label) respectively, and the other end compartment of terrain of each first kind VOC gas service pipe 700 is communicated with a part of VOC gaseous mixture from the second blender 600 to be delivered to traveling-grate stoker 120 combustion-supporting and contained VOC gas combustion is decomposed with the diapire of body of heater 100.One end of two Equations of The Second Kind VOC gas service pipes 800 is communicated with VOC gas line respectively, and the other end is connected combustion-supporting and contained VOC gas combustion is decomposed a part of VOC gaseous mixture from the second blender 600 to be delivered to two burners 400 respectively with the 2nd VOC gaseous mixture entrance 430 of two burners 400.
In this non-limiting embodiment, this coal-fired thermal oil furnace also comprises the coal bunker 900 for supplying coal cinder 121 on traveling-grate stoker 120 that a chain driving wheel (not shown), two chain driven pulley (not shown) and contiguous body of heater 100 1 end face are arranged.Traveling-grate stoker 120 is arranged to ring-type around chain driving wheel and two chain driven pulleys, makes traveling-grate stoker 120 under the driving of chain driving wheel, rotate to deliver the coal cinder 121 from coal bunker 900 to the heat release of burner hearth combustion.
In addition, according to this non-limiting embodiment, the combustion-supporting coal-fired thermal oil furnace of VOC gas also comprises the conveyer belt 330 for carrying coal in gas producer 300, and conveyer belt 330 simultaneously for supplementing coal in coal bunker 900.
As a kind of alternative embodiments, this coal-fired thermal oil furnace can not comprise heat exchanger 500, flue gas is directly expelled to chimney via flue by the first exhanst gas outlet 130, directly be connected with VOC gas line containing VOC gas source, cold VOC gas enters the second blender 600 through VOC gas line and mixes with air.
As another kind of alternative embodiments, this coal-fired thermal oil furnace can not comprise the second blender 600, and the hot VOC gas that the hot VOC gas vent 540 through heat exchanger 500 exports does not mix with air.
As another alternative embodiments, the VOC gas line of this coal-fired thermal oil furnace can not comprise first kind VOC gas service pipe and/or Equations of The Second Kind VOC gas service pipe.
As another non-limiting embodiment, this coal-fired thermal oil furnace can not comprise conveyer belt 330.
Be in operation, the high-temperature flue gas (accounting for 35% of total flue gas volume amount) of about 900 degrees Celsius directly from the burner hearth of body of heater 100 fully mixes with the VOC gaseous mixture of about 200 degrees Celsius from the second blender 600 by the second exhanst gas outlet 140 injection to the first blender 200 is interior, and mixed empty cigarette gaseous mixture enters in gas producer 300 as gasifying agent.What generate in gas producer 300 is delivered to two burner 400 combustion heat release containing residual VOC coal gas.
From body of heater 100 with the abundant heat exchange of conduction oil after about 450 degrees Celsius in warm flue gas (accounting for 65% of total flue gas volume amount) enter heat exchanger 500 and VOC gas converting heat by the first exhanst gas outlet 130 after become about 100 degrees Celsius of low-temperature flue gas and be expelled to chimney.
That carrys out self-contained VOC gas source is about 20 degrees Celsius containing VOC gas temperature, and the VOC gas temperature that contains after heat exchanger 500 with flue gas heat exchange is about 250 degrees Celsius, and hot VOC gas enters the second blender 600 through VOC gas access 610.The air themperature entering the second blender 600 via air intake 620 is about 20 degrees Celsius, through being discharged by VOC mixed gas outlet 630 after mixing in blender 600 with air from the hot VOC gas of heat exchanger 500, the temperature of the VOC gaseous mixture of discharge is about 200 degrees Celsius.
It is combustion-supporting that VOC gaseous mixture from about 40% (volume) of blender 600 is delivered to traveling-grate stoker 120 via first kind VOC gas service pipe 700, it is combustion-supporting that the VOC gaseous mixture of about 30% (volume) is delivered to burner 400 via Equations of The Second Kind VOC gas service pipe 800, and the VOC gaseous mixture of about 30% (volume) is interior as gasifying agent via being delivered to gas producer 300 after mixing with the high-temperature flue gas from burner hearth in VOC gas line injection to the first blender 200.Wherein, flue gas and VOC gaseous mixture mixed temperature in the first blender 200 is about 600 degrees Celsius, is about 15% with volume percent oxygen content.
Although describe the preferred embodiment of the present invention in detail at this, but should be understood that the present invention is not limited to the concrete structure described in detail and illustrate here, other modification and variant can be realized when not departing from the spirit and scope of the invention by those skilled in the art.Such as, according to the temperature of the high-temperature flue gas of the quantity regulating body of heater burning coal cinder generation of change burner.In addition, the temperature of system or pressure and other parameters suitably can be chosen according to concrete application conditions.
Claims (10)
1. the coal-fired thermal oil furnace that VOC gas is combustion-supporting, comprising:
Body of heater, is provided with the burner hearth for heating conduction oil in described body of heater;
Heat exchange coil, described heat exchange coil is arranged in described burner hearth, and the conduction oil flowing through described heat exchange coil is heated in described burner hearth;
Traveling-grate stoker, described traveling-grate stoker is located at the bottom of described burner hearth for coal cinder being delivered to described burner hearth combustion; And
Flue, described flue is connected to the first exhanst gas outlet of described body of heater, for flue gas is expelled to chimney;
It is characterized in that:
Comprise the first blender, gas producer further and be located at least one burner on the sidewall of described body of heater, and described body of heater is provided with further the second exhanst gas outlet be communicated with described burner hearth, wherein, described first blender comprises high-temperature flue gas entry, a VOC gaseous mixture entrance and empty cigarette mixed gas outlet; Described second exhanst gas outlet is communicated with the described high-temperature flue gas entry of described first blender by flue gas arm; The described empty cigarette mixed gas outlet of described first blender is communicated with the gasification agent inlet of described gas producer by gasifying agent pipeline, being delivered to from the VOC gaseous mixture of described first blender and the mixed empty cigarette gaseous mixture of high-temperature flue gas in described gas producer as gasifying agent and making contained VOC gas pyrolytic; The gas exit of described gas producer to be connected to the heat release of described burner hearth combustion, contained residual VOC gas combustion will be decomposed containing residual VOC gas injection by gas-pipe line with at least one burner described.
2. the coal-fired thermal oil furnace that VOC gas as claimed in claim 1 is combustion-supporting, it is characterized in that, comprise the heat exchanger be located in described flue further, described heat exchanger comprises flue gas flow path and VOC gas flow path, carrys out the described VOC gaseous mixture entrance being delivered to described first blender containing VOC gas flow after described heat exchanger and flue gas heat exchange by VOC gas line of self-contained VOC gas source.
3. the coal-fired thermal oil furnace that VOC gas as claimed in claim 2 is combustion-supporting, it is characterized in that, warm smoke inlet and low-temperature flue gas outlet during the two ends of described flue gas flow path are formed respectively, described middle temperature smoke inlet is communicated with described first exhanst gas outlet of described body of heater, described low-temperature flue gas outlet is connected to chimney, the two ends of described VOC gas flow path form cold VOC gas access and hot VOC gas vent respectively, described cold VOC gas access is connected to containing VOC gas source, described hot VOC gas vent is communicated with a described VOC gaseous mixture entrance of described first blender by described VOC gas line.
4. the coal-fired thermal oil furnace that VOC gas as claimed in claim 3 is combustion-supporting, it is characterized in that, comprise the second blender be located in described VOC gas line further, described second blender comprises containing VOC gas access, air intake and VOC mixed gas outlet, the described VOC gas access that contains is communicated with the described hot VOC gas vent of described heat exchanger, described air intake is connected to supplement air in VOC gas with the first blower fan, described VOC mixed gas outlet is communicated with a described VOC gaseous mixture entrance of described first blender.
5. the coal-fired thermal oil furnace that VOC gas as claimed in claim 4 is combustion-supporting, it is characterized in that, comprise at least four first kind VOC gas service pipes further, one end of each first kind VOC gas service pipe is communicated with described VOC gas line respectively, and the other end compartment of terrain of each first kind VOC gas service pipe is communicated with a part of VOC gaseous mixture from described second blender to be delivered to described traveling-grate stoker combustion-supporting and contained VOC gas combustion is decomposed with the diapire of described body of heater.
6. the coal-fired thermal oil furnace that VOC gas as claimed in claim 5 is combustion-supporting, it is characterized in that, comprise at least one Equations of The Second Kind VOC gas service pipe further, one end of each Equations of The Second Kind VOC gas service pipe is communicated with described VOC gas line respectively, and the other end of each Equations of The Second Kind VOC gas service pipe is connected combustion-supporting and contained VOC gas combustion is decomposed a part of VOC gaseous mixture from described second blender to be delivered at least one burner described respectively with at least one burner described.
7. the coal-fired thermal oil furnace that the VOC gas according to any one of claim 1 ~ 6 is combustion-supporting, it is characterized in that, comprise at least one chain driving wheel further, at least one chain driven pulley, and the coal bunker for supplying coal cinder on described traveling-grate stoker that contiguous described body of heater one end face is arranged, described traveling-grate stoker is arranged to ring-type around at least one chain driving wheel described and at least one chain driven pulley described, make described traveling-grate stoker under the driving of at least one chain driving wheel described, rotate to deliver the coal cinder from described coal bunker to the heat release of described burner hearth combustion.
8. the coal-fired thermal oil furnace that the VOC gas according to any one of claim 1 ~ 6 is combustion-supporting, it is characterized in that, at least one burner described comprise be relatively arranged on described body of heater two side on two burners, each burner comprises burner shell, be located at the gas entry of described burner shell one end wall, be located at the 2nd VOC gaseous mixture entrance of described burner casing body sidewall, be located at the flame export of the other end of described burner shell, and around described gas entry from the gas-jet tube that an end wall of described burner shell extends to described burner shell inside, the endcapped of described gas-jet tube and form some spray orifices on perisporium, make from described gas producer containing residual VOC coal gas by described some spray orifices be injected in described burner shell with the VOC gaseous mixture mixed combustion entered via described 2nd VOC gaseous mixture entrance.
9. the coal-fired thermal oil furnace that the VOC gas according to any one of claim 1 ~ 6 is combustion-supporting, it is characterized in that, described first blender comprises mixer case and is located at the induction tunnel in described mixer case, a described VOC gaseous mixture entrance is located at an end wall of described mixer case, described high-temperature flue gas entry is located at the sidewall of described mixer case, described empty cigarette mixed gas outlet is located at another end wall of described mixer case, described induction tunnel extends to described mixer case inside around the end wall of a described VOC gaseous mixture entrance from described mixer case.
10. the coal-fired thermal oil furnace that VOC gas as claimed in claim 9 is combustion-supporting, is characterized in that, described first blender comprise further be located at described induction tunnel between end and another end wall of described mixer case for strengthening the impeller of gas and vapor permeation.
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| CN105485911B (en) | 2019-03-08 |
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