CN104748125B - Pyrolysis volatile matter combustion system - Google Patents

Pyrolysis volatile matter combustion system Download PDF

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Publication number
CN104748125B
CN104748125B CN201510111996.8A CN201510111996A CN104748125B CN 104748125 B CN104748125 B CN 104748125B CN 201510111996 A CN201510111996 A CN 201510111996A CN 104748125 B CN104748125 B CN 104748125B
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China
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combustion
pyrolysis
flue gas
furnace
temperature
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CN201510111996.8A
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Chinese (zh)
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CN104748125A (en
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戴晓虎
陈德珍
尹丽洁
张静思
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同济大学
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/46Recuperation of heat

Abstract

The invention relates to a combustion system of volatile matter produced through pyrolysis, and stably and cleaning combustion of the volatile matter is achieved. The combustion system comprises a volatile matter condensation, temporary fuel gas storage and volatile matter insulation channel. A combustion furnace is provided with a combustor, a volatile matter and air inlet and a high-temperature flue gas channel made of temperature-resisting or high-temperature catalytic materials. Volatile matter produced by waste or biomass pyrolysis is divided into two paths, one path of volatile matter enters an air storage tank after condensation, the air storage tank is provided with a pipeline connected with the combustor of the combustion furnace, tar produced through condensation is fed back to a pyrolysis device, and the other path of volatile matter is fed into the combustion furnace through the insulation channel. The amount of the volatile matter entering the insulation channel is 3-5 times of the amount of the condensed volatile matter. The high-temperature flue gas channel radiates heat to the volatile matter in the furnace, the complete combustion and low NOx combustion of the volatile matter are guaranteed, the volume of air fed into the combustion furnace is adjusted according to the smoke temperature of an outlet, and the injection effect is formed on the volatile matter in arrangement.

Description

A kind of combustion system of pyrolysis devolatilization part

Technical field

The invention belongs to Waste disposal and energy field.In particular it relates to a kind of burning of pyrolysis devolatilization part System.

Background technology

Different from combustion system, solid combustible waste includes municipal refuse, mud, industrial organic waste, garden garbage, straw Solid combustible waste can be divided into the component that fugitive constituent and coke two parts contain energy by the pyrolysis of stalk etc., and fugitive constituent can be online Burning provides energy, and coke can be used for special purpose.The online burning of fugitive constituent has been saved the required energy of pyrolysis and has been supplied Should, make pyrolytic process realize certainly maintaining of energy.But the burning of fugitive constituent equally runs into NOx emission problem, additionally there are Burn halfway problem.

Theoretical according to existing research, the NO of generation mainly has 3 kinds of approach, i.e. heating power type (Thermal-NO), burning type And Quick-type (Prompt-NO) (Fuel-NO);Wherein fuel type NO accounts for more than the 60%~80% of the total growing amount of NO, fuel type NO derives from original nitrogen in waste and generates through thermal decomposition and oxidation reaction, and these nitrogens are in waste combustion process Middle burning with fugitive constituent burning and coke respectively generates NO, and the nitrogen substance in fugitive constituent enriches, and existing research also indicates that: NO (clock Beijing, Yang Jing, Fu Weibiao more than the NO that coke burning generates that fugitive constituent burning generates.The fugitive constituent component pair of coal Impact, combustion science and the technology of NOx and SOx discharge, 1998,4 (4):363~368.).

In recent years, energy supply is more and more nervous, and the new energy is all found positive in countries in the world.Discarded object, living beings Deng the energy be that a kind of important energy of China supplements.Such as China is a large agricultural country, and annual agricultural wastes yield is huge Greatly, only rice hulls yield is just up to 54,000,000 t, substantial amounts of Open Burning Crop Residue, brings environmental pollution, causes haze sky Gas;Reasonably develop this energy resources and there is important economic worth and far-reaching social effect.The burning of living beings Characteristic and coal have very big difference, and early stage burning is mainly the burning of fugitive constituent, and the volatile content of general living beings is up to 80 % about;Therefore, the combustion mechanism of research fugitive constituent all has great importance to raising efficiency of combustion, reduction NOx emission.Existing Researching and analysing of having shows, under conditions of fixed bed, the fugitive constituent ignition of living beings is controlled by diffusion(Liu Hao, Zhou Yan Mound, Zeng Yujian, Lin Zhijie;The fugitive constituent combustion mechanism research of rice hulls, generating equipment, 1997-06,23-26).Except living beings Outward, also in the Land use systems of energy contained by municipal refuse, mud, industrial organic waste, garden garbage etc., pyrolysis is one Important mode;Compared with solid direct combustion, pyrolysis divides the waste into fugitive constituent and coke, and its burning is all directly burnt clearly than waste Clean, especially fugitive constituent is in gaseous combustion, has the precondition of cleaning burning.

Pyrolysis of coal produces fugitive constituent, is the accessory substance in order to produce coal tar, typically first condenses to obtain coal tar, and clean Coke-stove gas afterwards can boost utilization.But the pyrolysis such as municipal refuse, mud, industrial organic waste, garden garbage, stalk are produced Raw fugitive constituent is different from the fugitive constituent of coal, sets it is generally desirable to directly burning without condensing steps and not only can saving condensation Standby, burning at high temperature can also save energy consumption, improves utilization efficiency of heat energy.

Different from conventional gas fuel combustion, the difficulty that fugitive constituent is especially hot, the fugitive constituent that is in high temperature exists It is:1)The fugitive constituent dirt of existing combustible waste and biomass pyrolytic generation is in normal pressure or micro-vacuum state;It is difficult to adopt All kinds of gas burner burns;2)Fugitive constituent usually contains the material of bigger molecule, good to the time needed for after-flame and air Good mixing and temperature have higher requirement, but are because to burn using burner, and the problem of burning can only be by setting Dual firing chamber and auxiliary burner solve, and waste space and valuable auxiliary fuel;3)It is in the fugitive constituent of high temperature and air is adopted If in furnace cavity, burning does not have explosion danger in order immediately after being mixed with conventional mode;4)Pyrolysis oven generally uses volatilization The flue gas that part burning produces, because the heating surface of pyrolysis oven has resistance, flue gas should have pressure-fired.The need of above-mentioned contradiction Ask so that the burning of fugitive constituent and the fume afterheat of generation utilize performance difficulty.In addition above already described, the burning of fugitive constituent also has Serious NO problem needs to avoid.

In view of the combustion of the flammable solid waste pyrolysis devolatilization part such as municipal refuse, mud, industrial organic waste, garden garbage, stalk Burn difficult present situation, present invention proposition is efficient, economical, feasible, do not increase additional investment and operating cost, saving dispose the one of place Plant combustion system and the combustion furnace of pyrolysis devolatilization part, can burn and be in the fugitive constituent of high temperature, tiny structure, gaseous state, and produce There are the high-temperature flue gas of pressure-fired, the utilization beneficial to fume afterheat and the low NOx drainage of flue gas.

Content of the invention

It is an object of the invention to provide a kind of combustion system of pyrolysis devolatilization part.

The combustion system of pyrolysis devolatilization part proposed by the present invention, including pyrolysis oven, condenser 4, combustion furnace 8, combustion gas storage tank 10 and heat preservation channel 3;Described combustion furnace 8 be equiped with burner 12, air-gas mixer import 21, high temp. flue 22, Flame partition wall 23 and furnace exit 24;Described pyrolysis oven passes through heat preservation channel 3 respectively and regulating valve 17 connects condenser 4 and combustion Burn stove 8, the tar outlet of condenser 4 connects pyrolysis oven, and the exhanst gas outlet of combustion furnace 8 connects pyrolysis oven, and combustion furnace 8 passes through burning Device 12 connects combustion gas storage tank 10 by gas pipeline 11;Condenser 4 passes through booster fan 9 and pipeline connects combustion gas storage tank 10;Heat The fugitive constituent 2 that solution material 1 (waste or living beings) passes through the pyrolysis generation of pyrolysis oven is divided into two-way, and a road is through heat preservation channel 3 send into combustion furnace 8 by air ejection;Another road enters combustion gas storage tank 10 after condenser 4;The tar 5 producing at condenser 4 Send pyrolysis oven back to;The volatilization deal sending into combustion furnace 8 is 3 ~ 5 times of the volatilization deal sending into condenser 4.

In the present invention, the high temp. flue 22 in described combustion furnace 8 makes flue gas complete at least 2 backhaul combustions wherein Burn the length of body of heater and then just discharge out of the furnace, the time of staying is more than 2 s, to ensure burning completely and the low NOx combustion of fugitive constituent.

In the present invention, inside the thorax of described combustion furnace 8, it is provided with 1 layer or 2 layers of flame partition wall 23.

In the present invention, described high temp. flue 22 is selected from Ceramic Balls filling plate, porous ceramic plate, the filling of metal wave belt In plate, refractory concrete course, refractory ceramic fibre plate or the ceramic honey comb wall scribbling heatproof catalyst any one, Ke Yiding Phase cleans.

In the present invention, the described air 14 sending into combustion furnace carrys out injection vaporization at high temperature part and is entered by air-gas mixer Mouth 21 entrance burner hearths, have high-temperature flue gas pump orifice 19 and return mouth 20 inside burner hearth;Pressure and cigarette by furnace exit 24 The pressure of CO concentration comprehensive adjustment air 14 and flow in gas.

In the present invention, the air-gas mixer import 21 of the described combustion furnace 8 high-temperature flue gas suction near burner hearth Mouth 19;Return mouth 20 connection high temp. flue 22.

In the present invention, described heat preservation channel 3 is normal pressure or tiny structure (gauge pressure -120 ~ 0 Pa), furnace exit 24 And flue gas pipeline 13 is normal pressure or pressure-fired(Gauge pressure 0 ~ 900Pa).

In the present invention, combustion furnace 8 is externally provided with high-temperature flue gas circulating fan 18, and described high-temperature flue gas circulating fan 18 connects respectively Connect high-temperature flue gas pump orifice 19 and return mouth 20.

The advance that the combustion system of the present invention has and advantage are:

1)Obtain clean gas using a small amount of fugitive constituent condensation, can light a fire after boosting, stablize and burn, be not required to outside confession Answer auxiliary fuel;

2)Less using a small amount of fugitive constituent condensation tar content producing, it is possible to use to return pyrolysis oven this simple more Way becomes combustion gas again;And if most or all of tar all condenses, then not only condenser is huge, and produced Many tar, it is impossible to process by the way of directly returning pyrolysis oven, needs separately to set tar lance combustion, and lance combustion tar Generation to NOx is also difficult to control to.

3)Substantial amounts of hot fugitive constituent enters combustion furnace 8 so that the physical sensible heat of fugitive constituent can be utilized by heat preservation channel, Improve the thermal efficiency.

The blender of fugitive constituent and air after burned device ignition, aspirated by high-temperature flue gas circulating fan 19, Flow along furnace high-temperature exhaust gases passes 22 in the presence of flame partition wall 23, not only tortuous prolongation of course stops flue gas stream Time, and fine with selected from Ceramic Balls filling plate, porous ceramic plate, metal wave belt filling plate, refractory concrete, refractory Dimension plate, scribbles the contact of the temperature-resistant materials such as the ceramic honey comb of heatproof catalyst, and fugitive constituent is easy to being sufficiently mixed of combustion oxygen Realize.And due to the dilution to flame for the high temp. flue 22, it is to avoid area of localized hyperthermia is so that the generation of NOx is pressed down System.

Analyse burning time longer demand for adapting to fugitive constituent, so that the good combustion of fugitive constituent, composition high-temperature flue gas lead to The temperature-resistant material temperature exceed all the time fugitive constituent ignition temperature in road 22, makes the fugitive constituent continued stable combustion having not enough time to burn.

Hydrogen, methane, the hydrocarbon containing 2 and above carbon atom and tar is usually contained in fugitive constituent.Every kind of composition Ignition temperature and the time that burns different.Generally, the burning-point of hydrogen, methane and tar is respectively 575 DEG C, 630 DEG C, 425 ± 50 DEG C, the sustained combustion time of hydrogen and methane and temperature range shorter, finally condensable become tar fugitive constituent duration The longest.If oxygen amount is sufficient, temperature suitable, the burning completely of tar just enables.Therefore, if occurred in combustion furnace burner hearth Fugitive constituent imperfect combustion phenomenon, then wherein main component must be can be condensed into those components of tar and tar component because to Hypoxgia, the carbon black being produced by thermal decomposition.The burning completely of therefore fugitive constituent needs:(a) sufficiently high temperature;B () is enough The oxygen of amount;(c) good mixing;For the vaporization at high temperature part that can not burn using general gas burner, need to take Special measure is sent to combustion furnace 8 makes above-mentioned burning three elements (a), (b) and (c) be met.

Fugitive constituent combustion oxygen amount needed for combustion furnace 8 can be provided by centrifugal high pressure fan, through injector or mixed Clutch injection vaporization at high temperature part, the mixing good with fugitive constituent in this process, the outlet 19 of mixture is in combustion furnace 8 Portion, not only air --- fugitive constituent mixed effect is excellent, and allows burner hearth to assume pressure-fired.But because fugitive constituent exists The exit of pyrolysis oven is probably often negative pressure (- 120 ~ 0 Pa), produces furnace exit iff by air 14 injection Malleation, then need higher air pressure (being likely to be breached 50Kpa), so conventional high pressure positive blower can not meet, and adopts Then flow is little for roots blower, high-pressure vortex blower fan, power consumption is big it is impossible to satisfaction requires.Feature for combustion furnace 8 in this present invention It is high-temperature flue gas circulating fan 18 to be set outside combustion furnace, allows high temperature near burner hearth for the air-gas mixer import 21 Flue gas pump orifice 19;And return mouth 20 connection high temp. flue 22.Pass through between high-temperature flue gas pump orifice 19 and time mouth 20 Flame partition wall separates.The blast of so high pressure positive blower is still selected between 7 ~ 20KPa.

Using a kind of combustion system of pyrolysis devolatilization part provided by the present invention and combustion furnace usefulness it is:

1)Solid waste and biomass pyrolytic can be enable to process the fugitive constituent producing and burn at high temperature, make use of itself Physical sensible heat, and so that tar is burnt under gaseous state, promote with the mixed performance of air, improve heat energy utilization effect Rate.And avoid building jumbo fugitive constituent condensing unit, and gas storage device;This reduces dangerous generation can Can property and destructiveness.

2)Due to using the igniting of low discharge fugitive constituent, stable burning, it is to avoid using outside high-quality auxiliary fuel.With The tar of Shi Shaoliang is returned pyrolysis oven and produces combustion gas, it is to avoid the process to tar and processing.

3)By the high temp. flue 22 of setting temperature-resistant material composition in combustion furnace, enable pyrolysis devolatilization part long-time Burning, uniformity of temperature profile, it is to avoid unburnt occur and produce NOx in flame.

4)By air inlet arrange induction apparatus and in combustion furnace the circulation of setting high-temperature flue gas so that the waving of tiny structure Send out the flue gas that part can produce pressure-fired after combustion, be easy to flue gas and overcome the resistance of heat-transfer area and realize heat energy utilization.

Brief description

Fig. 1 pyrolysis devolatilization part combustion system.

Fig. 2 fugitive constituent combustion furnace.

Fig. 3 fugitive constituent-air inlet induction apparatus.

1 is pyrolysis material;2 is fugitive constituent;3 is heat preservation channel;4 is condenser;5 is tar;6 is that cooling water enters;7 is cold But water goes out;8 is combustion furnace;9 is booster fan;10 is combustion gas storage tank;11 is gas pipeline;12 is burner;13 is flue gas;14 It is air;15 is coke;16 is coke cooling storage;17 is regulating valve;18 is high-temperature flue gas circulating fan;19 is high-temperature flue gas Pump orifice;20 are back mouth;21 is air-gas mixer import;22 is high temp. flue;23 is flame partition wall;24 are Exhanst gas outlet;25 is heat-insulation layer;26 is maintenance door.

Specific embodiment

Further illustrate the present invention below by embodiment.

Embodiment 1

As illustrated, described combustion system includes the insulation of the condenser 4, combustion gas storage tank 10 and fugitive constituent of fugitive constituent 2 Passage 3;Described combustion furnace 8 is equiped with the mixing import 21 of burner 12, fugitive constituent 2 and air, the height of temperature-resistant material composition Warm exhaust gases passes 22 and flame partition wall 23.The volatile matter 2 of waste or biomass pyrolytic generation is divided into two-way, and a road is through protecting Warm pipeline 3 sends into combustion furnace 8 by air 14 injection;Another road enters combustion gas storage tank 10 after condenser 4;Combustion gas storage tank 10 has Pipeline connects the burner 12 of combustion furnace 8;And the tar 5 producing at condenser 4 sends pyrolysis installation back to.The former sends into insulating tube The volatilization deal in road 3 is the latter i.e. through 3 ~ 5 times of volatilization deal of condenser 4.

The dry base heat value that certain criticizes that city's sewage sludge yield is 50t/d is 15500KJ/kg, aqueous 80%.During pyrolysis processing, Fugitive constituent needs the energy consumption to provide pyrolysis and drying sludge for the online burning, and the resistance of pyrolysis apparatus to the heating resistance of flue gas is ΔP = 600 Pa.Under 550 DEG C about of pyrolysis temperature, tar is divided by the 1/4 of the fugitive constituent total amount of generation through condenser 4 From discharge, and it is transported in pyrolysis oven and contacts decomposition again with charcoal.The 3/4 of the fugitive constituent total amount producing through heat preservation channel 3, by Induction apparatus shown in Fig. 3 sends into combustion furnace 8;The volume of combustion furnace is 2m3, length × width × height position 2.5 × 1.0 × 0.8m, After burned device ignition, major part aspirated by high-temperature flue gas circulating fan 18, due to being stopped by flame partition wall 23, from return The flue gas that mouth 20 returns(Include uncombusted combustible component)Filling warp in the high temp. flue 22 that plate forms by Ceramic Balls Cross the flow process of 2 burning furnace length, the time of staying is more than 3s.Flue gas carries out heat friendship in high temp. flue and between Ceramic Balls Change, Ceramic Balls keep high temperature the ignition temperature higher than fugitive constituent, make fugitive constituent realize burning completely.Nitrogen component in fugitive constituent As NH3And the total content of HCN etc. is up to 1.15%V/V it is easy to generate NOx;Using the slow combustion in high temp. flue 22 Burn, there is no localized hyperthermia, in flue gas, the growing amount of NOx is less than 200mg/Nm3, can row up to standard after acid gas purifying Put.Because pyrolysis oven assumes the negative pressure of -20 Pa, vaporization at high temperature part is negative pressure, and by the air ejection of 7 KPa, the amount of air is 2.65 times of hot fugitive constituent volume.There is drag losses after multiple flue flow processs, the temperature of the high-temperature flue gas 13 of outlet exists Between 840 ~ 900 DEG C, the pressure just having gone out combustion furnace is 690Pa, beneficial to follow-up heat energy utilization.

Embodiment 2

Certain municipal refuse residue after pulverizing(Plastics, big part etc. are by go-no-go)50t/d, dry base heat value is 13000KJ/ Kg, aqueous 70%, it is desirable with pyrolysis after extrusion dehydration to after 55% about and dispose.During pyrolysis processing, fugitive constituent needs online combustion Burn to provide pyrolysis and the energy consumption being dried, the resistance of pyrolysis apparatus is Δ P=500 Pa to the heating resistance of flue gas.At 550 DEG C Under the pyrolysis temperature of left and right, tar separation is discharged by the 1/3 of the fugitive constituent total amount of generation through condenser 4, and is transported to pyrolysis Contact decomposition again with charcoal in stove.Through heat preservation channel 3, induction apparatus as shown in Figure 3 send for the 2/3 of the fugitive constituent total amount producing Enter combustion furnace 8;Length × width × height position 2.63 × 1.2 × 1.1m of combustion furnace 8, after the ignition of burned device 12, big portion Divide and aspirated by high-temperature flue gas circulating fan 18, due to being stopped by flame partition wall 23, from the flue gas returning mouth 20 return(Include unburned Combustible component to the greatest extent)Through the flow process of 2 burning furnace length in the high temp. flue 22 being made up of porous ceramic plate, during stop Between more than 3s.Flue gas carries out heat exchange in high temp. flue and between ceramic wafer, and porous ceramic plate keeps high temperature and is higher than to wave Send out the ignition temperature of part, make fugitive constituent realize burning completely.Nitrogen component such as NH in fugitive constituent3And the total content of HCN etc. reaches 0.95%V/V is it is easy to generate NOx;Using the smoulder in high temp. flue 22, there is no localized hyperthermia, NOx in flue gas Growing amount be less than 180mg/Nm3, can be with qualified discharge after acid gas purifying.Because pyrolysis oven assumes -30 Pa's Negative pressure, vaporization at high temperature part is negative pressure, and by the air ejection of 15KPa, the amount of air is 2.75 times of hot fugitive constituent volume.Through excessive There is drag losses, the temperature of the high-temperature flue gas 13 of outlet, between 840 ~ 900 DEG C, has just gone out the pressure of combustion furnace after individual flue flow process Power is 700Pa, beneficial to follow-up heat energy utilization.

Embodiment 3

The dry base heat value of certain batch of 30t/d stalk is 14500KJ/kg, has been dried, and moisture content about 8% is it is desirable to utilize heat Solution is disposed and is obtained charcoal.During pyrolysis processing, fugitive constituent needs to burn to provide the energy consumption of pyrolysis, the resistance pair of pyrolysis apparatus online The heating resistance of flue gas is Δ P=560 Pa.Under 500 DEG C about of pyrolysis temperature, 1/5 warp of the fugitive constituent total amount of generation Cross condenser 4 to discharge tar separation, and be transported in pyrolysis oven and contact decomposition again with charcoal.The 4/ of the fugitive constituent total amount producing 5 send into combustion furnace 8 through heat preservation channel 3, induction apparatus as shown in Figure 3;The length × width × height position 2.6 × 1.2 of combustion furnace 8 × 1.1m, after the ignition of burned device 12, major part is aspirated by high-temperature flue gas circulating fan 18, due to by flame partition wall 23 Stop, from the flue gas returning mouth 20 return(Include uncombusted combustible component)The high temperature cigarette that plate forms is being filled by metal wave belt Through the flow process of 2 burning furnace length in gas passage 22, the time of staying is more than 3s.Flue gas in high temp. flue with metal wave Shape interband carries out heat exchange, and metal wave belt keeps high temperature the ignition temperature higher than fugitive constituent, makes fugitive constituent realize firing completely Burn.Nitrogen component such as NH in fugitive constituent3And the total content of HCN etc. reaches 1.07%V/V it is easy to generate NOx;Using in high-temperature flue gas Smoulder in passage 22, does not have localized hyperthermia, and in flue gas, the growing amount of NOx is less than 190mg/Nm3, net through sour gas Can be with qualified discharge after change.Because pyrolysis oven assumes the negative pressure of -40 Pa, vaporization at high temperature part is negative pressure, is drawn by the air of 12KPa Penetrate, the amount of air is 2.7 times of hot fugitive constituent volume.There is drag losses, the high temperature cigarette of outlet after multiple flue flow processs Between 840 ~ 910 DEG C, the pressure just having gone out combustion furnace is 750Pa to the temperature of gas 13, beneficial to follow-up heat energy utilization.

Embodiment 4

The dry base heat value of the industrial organic waste of a collection of 30t/d in certain city is 18800KJ/kg, aqueous 40%, containing necessarily dense Degree heavy metal it is desirable to pyrolysis processing so as to produce charcoal can directly fill.During pyrolysis processing, fugitive constituent needs online combustion Burn to provide the energy consumption of pyrolysis, the resistance of pyrolysis apparatus is Δ P=450 Pa to the heating resistance of flue gas.At 550 DEG C about Under pyrolysis temperature, tar separation is discharged by the 1/4 of the fugitive constituent total amount of generation through condenser 4, and is transported in pyrolysis oven again Secondary contact decomposition with charcoal.Burning is sent into through heat preservation channel 3, induction apparatus as shown in Figure 3 in the 3/4 of the fugitive constituent total amount producing Stove 8;Length × width × height position 2.4 × 1.3 × 1.1m of combustion furnace 8, major part is aspirated by high-temperature flue gas circulating fan 18, due to quilt Flame partition wall 23 stops, from the flue gas returning mouth 20 return(Include uncombusted combustible component)It is being made up of refractory ceramic fibre plate High temp. flue 22 in through 2 burning furnace length flow process, the time of staying is more than 3s.Flue gas is in high temp. flue Contacted with refractory ceramic fibre plate, the heat-insulating property of refractory ceramic fibre make flue gas keep high temperature and be higher than fugitive constituent Fiery temperature, makes fugitive constituent realize burning completely.Nitrogen component such as NH in fugitive constituent3And the total content of HCN etc. reaches 1.51%V/V, easily In generation NOx;Using the smoulder in high temp. flue 22, there is no localized hyperthermia, in flue gas, the growing amount of NOx is less than 200mg/Nm3, can be with qualified discharge after acid gas purifying.Because pyrolysis oven assumes the negative pressure of -60 Pa, vaporization at high temperature Part is negative pressure, and by the air ejection of 18KPa, the amount of air is 2.8 times of hot fugitive constituent volume.Deposit after multiple flue flow processs In drag losses, between 870 ~ 940 DEG C, the pressure just having gone out combustion furnace is 650Pa to the temperature of the high-temperature flue gas 13 of outlet, Beneficial to follow-up heat energy utilization.

Embodiment 5

Yield 40t/d of certain city's garden garbage, dry base heat value is 15600KJ/kg, aqueous 50%.Pyrolysis processing after pulverizing Disposed using pyrolysis and obtain charcoal.During pyrolysis processing, fugitive constituent needs to burn to provide the energy consumption of pyrolysis online, pyrolysis apparatus Resistance is Δ P=660 Pa to the heating resistance of flue gas.Under 500 DEG C about of pyrolysis temperature, the fugitive constituent total amount of generation 1/5 through condenser 4, tar separation is discharged, and be transported in pyrolysis oven and contact decomposition again with charcoal.The fugitive constituent producing Combustion furnace 8 is sent into through heat preservation channel 3, induction apparatus as shown in Figure 3 in the 4/5 of total amount;The length × width × height position of combustion furnace 8 2.3 × 1.2 × 0.8m, after the ignition of burned device 12, major part is aspirated by high-temperature flue gas circulating fan 18, due to quilt Flame partition wall 23 stops, from the flue gas returning mouth 20 return(Include uncombusted combustible component)In the height being built into by refractory concrete Through the flow process of 2 burning furnace length in warm exhaust gases passes 22, the time of staying is more than 3s.Flue gas in high temp. flue with resistance to Carry out heat exchange, refractory concrete and flue gas all keep high temperature the ignition temperature higher than fugitive constituent, make to wave between fiery concrete walls Send out part to realize burning completely.Nitrogen component such as NH in fugitive constituent3And the total content of HCN etc. reaches 1.01%V/V it is easy to generate NOx; Using the smoulder in high temp. flue 22, there is no localized hyperthermia, in flue gas, the growing amount of NOx is less than 180mg/Nm3, Can be with qualified discharge after acid gas purifying.Because pyrolysis oven assumes the negative pressure of -34 Pa, vaporization at high temperature part is negative pressure, By the air ejection of 17KPa, the amount of air is 2.7 times of hot fugitive constituent volume.There is resistance to damage after multiple flue flow processs Lose, between 840 ~ 910 DEG C, the pressure just having gone out combustion furnace is 800Pa, beneficial to follow-up for the temperature of the high-temperature flue gas 13 of outlet Heat energy utilization.

Embodiment 6

The dry base heat value of the industrial organic waste of a collection of 50t/d in certain city is 9800KJ/kg, aqueous 30%, containing necessarily dense Degree heavy metal it is desirable to pyrolysis processing so as to produce charcoal can directly fill.During pyrolysis processing, fugitive constituent needs online combustion Burn to provide the energy consumption of pyrolysis, the resistance of pyrolysis apparatus is Δ P=850 Pa to the heating resistance of flue gas.At 500 DEG C about Under pyrolysis temperature, tar separation is discharged by the 1/3 of the fugitive constituent total amount of generation through condenser 4, and is transported in pyrolysis oven again Secondary contact decomposition with charcoal.Burning is sent into through heat preservation channel 3, induction apparatus as shown in Figure 3 in the 2/3 of the fugitive constituent total amount producing Stove 8;Length × width × height position 2.5 × 1.2 × 1.0m of combustion furnace 8, after the ignition of burned device 12, major part is by high temperature Flue gas recirculation blower fan 18 aspirates, due to being stopped by flame partition wall 23, from the flue gas returning mouth 20 return(Include the flammable one-tenth of uncombusted Point)Through the stream of 2 burning furnace length in the high temp. flue 22 being made up of the ceramic honey comb wall scribbling heatproof catalyst Journey, the time of staying is more than 3s.Flue gas and scribbles heatproof catalyst in high temp. flue 18(As the oxidation of hexa-aluminate type metal Thing catalyst)Ceramic honey comb contacted, enable fugitive constituent be catalyzed burning.Nitrogen component such as NH in fugitive constituent3And HCN etc. Total content reaches 2.1%V/V it is easy to generate NOx;Using the smoulder in high temp. flue 22, there is no localized hyperthermia, cigarette In gas, the growing amount of NOx is less than 200mg/Nm3, can be with qualified discharge after acid gas purifying.Presented due to pyrolysis oven- The negative pressure of 119 Pa, vaporization at high temperature part is negative pressure, and by the air ejection of 20KPa, the amount of air is the 2.4 of hot fugitive constituent volume Times.There is drag losses after multiple flue flow processs, the temperature of the high-temperature flue gas 13 of outlet, between 770 ~ 840 DEG C, is burnt Flue gas pressures at outlet of still 24 are 890Pa, beneficial to follow-up heat energy utilization.

Above embodiment illustrate the present invention adoptable enforcement pattern in actual applications.But the present invention comprises any The fugitive constituent burning producing in solid waste and biomass pyrolysis process and combustion product can carry out the process of UTILIZATION OF VESIDUAL HEAT IN.This When the essential benefit of invention is, fugitive constituent is clean-burning simultaneously, and 1)It is avoided that the generation of NOx, 2)It is avoided that to outer secondary The consumption of combustion-supporting material, 3)Can be beneficial to the follow-up heat energy utilization of high-temperature flue gas.

Claims (4)

1. a kind of combustion system of pyrolysis devolatilization part it is characterised in that:Including pyrolysis oven, condenser (4), combustion furnace (8), combustion gas Storage tank (10) and heat preservation channel (3);Described combustion furnace (8) is provided with burner (12), air-gas mixer import (21), height Warm exhaust gases passes (22), flame partition wall (23) and furnace exit (24);Described pyrolysis oven passes through heat preservation channel (3) respectively and adjusts Section valve (17) connects condenser (4) and combustion furnace (8), and the tar outlet of condenser (4) connects pyrolysis oven, the cigarette of combustion furnace (8) Gas outlet connects pyrolysis oven, and equipped with burner (12) on combustion furnace (8), burner (12) connects combustion gas by gas pipeline (11) Storage tank (10);Condenser (4) passes through booster fan (9) and pipeline connects combustion gas storage tank (10);Pyrolysis oven is passed through in pyrolysis material (1) Pyrolysis produce fugitive constituent (2) be divided into two-way, a road through heat preservation channel (3) by air (14) injection send into combustion furnace (8); Another road enters combustion gas storage tank (10) after condenser (4);The tar (5) that condenser (4) place produces sends pyrolysis oven back to;Send into The volatilization deal of combustion furnace (8) is 3 ~ 5 times of the volatilization deal sending into condenser (4);Described heat preservation channel (3) be normal pressure or Gauge pressure -120 ~ 0 Pa, furnace exit (24) and flue gas pipeline (13) are normal pressure or gauge pressure 0 ~ 900Pa;Described combustion It is provided with 1 layer or 2 layers of flame partition wall (23) inside the thorax burning stove (8);Described high temp. flue (22) is selected from Ceramic Balls and fills Plate, porous ceramic plate, metal wave belt are filled plate, refractory concrete course, refractory ceramic fibre plate or are scribbled heatproof catalysis In the ceramic honey comb wall of agent any one;High temp. flue (22) in described combustion furnace (8) make flue gas complete wherein to Then the length of few 2 backhaul burner blocks just discharge out of the furnace, and the time of staying is more than 2 s, to ensure the burning completely of fugitive constituent And low NOx combustion.
2. pyrolysis devolatilization part according to claim 1 combustion system it is characterised in that:Send into the air (14) of combustion furnace Carry out injection vaporization at high temperature part and again burner hearth is entered by air-gas mixer import (21), inside burner hearth, have high-temperature flue gas pump orifice (19) and return mouth (20);By the pressure of furnace exit (24) and the pressure of CO concentration in flue gas comprehensive adjustment air (14) Power and flow.
3. pyrolysis devolatilization part according to claim 1 combustion system it is characterised in that:The air of described combustion furnace (8)- Fuel gas mixer import (21) is near the high-temperature flue gas pump orifice (19) within burner hearth;Return mouth (20) connection high-temperature flue gas to lead to Road (22).
4. pyrolysis devolatilization part according to claim 1 combustion system it is characterised in that:Combustion furnace (8) is externally provided with high temperature Flue gas recirculation blower fan (18), described high-temperature flue gas circulating fan (18) connects high-temperature flue gas pump orifice (19) respectively and returns mouth (20).
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