CN104728846A

CN104728846A - Rotating dual-roller incinerator

Info

Publication number: CN104728846A
Application number: CN201310699342.2A
Authority: CN
Inventors: 吴谦信
Original assignee: XIAMEN WOFENGDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Current assignee: XIAMEN WOFENGDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2015-06-24

Abstract

The invention relates to a garbage incinerator, in particular to a rotating dual-roller incinerator. The flue gas residual heat is used as a heating source of garbage drying. The natural air is used as the combustion improver for garbage burning. The consumption plan that the flying ash is used for absorbing dioxin and heavy metal and substituting the auxiliary fuel for combustion supporting and the absorbent is input to purify the glue gas is adopted. The methods of active prevention and the decomposition and elimination of the organic pollutant substitute the passive preventive measures after the generation of the pollutants. The rotating dual-roller incinerator enables the garbage burning and treatment to save resources and overcome the secondary pollution, realizes the coexistence of environment protection and economy, and achieves the dual purposes of energy saving and environment protection.

Description

Rotary twin-roll incinerator

Technical field

The present invention relates to a kind of incinerator, particularly the rotary twin-roll incinerator of one.

Background technology

Garbage disposal is the global problem of a puzzlement human society always.Do not have the rubbish of timely harmless treatment to take up an area besieged city, contaminated environment, spread disease, restrict economic development, threaten the harmony of society with stable.

Burning disposal rubbish has been the basic orientation of innoxious, minimizing and resource.The main flow type of furnace monopolized by developed country's designer is in the market " grate-type " incinerator, be applicable to developed country's refuse classification, calorific value high (7700-13900KJ/kg), moisture content < 25%, containing ash content < 5%, be conducive to the characteristic of burning.And China and the developing countries are compostings, calorific value low (3350-5000 KJ/kg), moisture content 40%-60%, containing ash content 15%-25%, the characteristic of unfavorable burning, the main flow type of furnace " grate-type " incinerator of therefore paying through the nose to introduce often is suffered from " water and soil unsuitable ", needs that the auxiliary fuel of interpolation more than 20% is combustion-supporting could maintain normal combustion; Must drop in gas cleaning process the absorption of the raw material such as enough active carbons and lime, in and could qualified discharge.China produces quantity of refuse 200,000,000 tons per year, if half (100,000,000 tons) adopts grate type incinerator harmless treatment, just needs consumption 2,000 ten thousand tons of standard coals every year, consumes 1500 tons of active carbons, consumes 300,000 tons of lime.The main flow type of furnace " grate-type " the incinerator technology introduced, the circle of its core technology and structural principle still Tiao Buchu developed country designer, all adopt consumption-type scheme burning disposal rubbish, run counter to Resources for construction economizing type, environmentally friendly and build the fundamental state policy of innovation-oriented country, therefore simply can not adopt the main flow type of furnace and imitate external.

Summary of the invention

In order to solve the problem of prior art, the invention provides a kind of rotary twin-roll incinerator, it utilizes fume afterheat as the rubbish heating source of drying and the combustion adjuvant adopting natural air as waste incineration, and adopt flying dust Xi Fu bioxin, heavy metal, substitute and add the combustion-supporting consumption-type scheme with dropping into adsorbent purifying smoke of auxiliary fuel, the method of organic pollution is eliminated with prevention Sum decomposition initiatively, substitute the passive prophylactico-therapeutic measures after pollutant generation, it can make incineration firing process not only economize on resources but also overcome secondary pollution, realize environmental protection and economy to coexist, reach the dual purpose of energy-conserving and environment-protective.

The technical solution adopted in the present invention is as follows:

A kind of rotary twin-roll incinerator, comprise drying roller (drying oven) and burn cylinder (incinerator), drying roller is placed in and burns respective independent operating directly over cylinder, described burning cylinder provides heating source for waste heat boiler, also for drying roller provides the heating source of clean-burning using waste heat from tail gas as drying rubbish, the punishment in advance mouth of described drying roller is communicated with burning cylinder by hopper, is the garbage fuel that burning cylinder provides calorific value high, dry and loose.

Drying roller is closed by rear and front end cap seal, in drying roller, weldering studs with lifting blade, drying roller is supported on raceway by four support rollers, burning cylinder is also supported on raceway by four support rollers, burn cylinder to be closed by rear and front end cap seal, burn edge refractory brick and the plate that pokes fire in cylinder, axially offering the radial oxygen supply device in 5-7 road along burning cylinder cylindrical, outside radial oxygen supply device, being arranged with air preheat circle.

The exit of drying roller arranges screening section, for sieving the garbage fuel of drying, drying roller is combined with screening section and is integrated, the closing cap of screening section and the rear end cap of drying roller are interconnected, offer screening thing discharge port below screening section closing cap, be connected with described punishment in advance mouth and communicate.

Burn drum outlet place to be connected with secondary combustion chamber, described secondary combustion chamber divides two-way, the direct-connected waste heat boiler of a road level, and a road is vertical up by pipeline communication drying roller.

Burn the lower air porch of the air preheat circle of the radial oxygen supply device of cylinder cylindrical, be connected with the upper end of " U " font ash delivering machine.

A kind of smoke circulating system of rotary twin-roll incinerator, be made up of burning cylinder and secondary combustion chamber, waste heat boiler, fume afterheat pipeline, drying roller, excessively hopper, burn cylinder and secondary combustion chamber, waste heat boiler, fume afterheat pipeline, drying roller, cross hopper and be linked in sequence successively, cross hopper and connect again and burn cylinder and formed and circulate.

The beneficial effect that technical scheme provided by the invention is brought is:

1, when work runs, the heat smoke of hot blast power traction heat boiler outlet is blown into drying oven, and rubbish, by the lifting blade in the baking furnace rotated, continuously promotes, scatters, advances, rubbish is heated, evaporate, dry, drying course is peeled off and is attached to the silt of rubbish, ash content after screening section screening, and rubbish becomes dry and loose combustibles, calorific value >=6000KJ/kg, moisture content≤15%, containing ash content≤2%, do not need any season to add auxiliary fuel, can spontaneous combustion continually and steadily.

The process of 2, drying, part combustible decomposes is fuel gas and the Residual Carbides of lightweight, and the rubbish of non-thermal decomposition, pass through hopper by the drying oven port of export and automatically fall into the burning burner hearth be placed in immediately below drying oven, burn inboard wall of burner hearth lining refractory brick, amount of stored heat is large, temperature is high.After the foul smell drying outlet of still extracted out from garbage storing hole to mix with the fuel gas of thermal decomposition and heats up, sucked by total air-introduced machine and burn burner hearth as axial wind (First air), rubbish and fuel gas enter and burn burner hearth ignition and decompose further, volatilize, gasify, carbide after oxygen and the pyrolysis of the rubbish bed of material and steam carry out water-gas reaction, produce the fuel gas hydrogen of high heating value, conflagration.By the oxygen supply device of rotary incinerator according to the thermal decomposition of combustion process, catch fire, volatilization, gasification, the function difference of burning and each section of after-flame and ignition temperature gradient provide appropriate oxidant (oxygen in nature air), i.e. radial multi-stage oxygen supply, due to drum rotating and the effect of the plate that pokes fire, rubbish carbon residue continuously promotes, scatter and decomposition, the fuel gas mixing of gasification, form suspension combustion, in burner hearth, fully mix intertexture with the axial First air of suction-type and the radial multi-stage oxygen supply (Secondary Air) of suction-type simultaneously, become spiral burning flue, be generally 5-7 spiralitys, very effectively extend flue gas and organic pollution passes through >=time of the oxidizing fire of 850 DEG C of high-temperature regions, guarantee the time (> 3S) having enough oxidation reactions.All flue gases, organic pollution etc. all must be burnt by cylinder burner hearth high temp fire Long Qu, do not have the dead angle of oxidizing fire, can not cause short circuit, can not flee, realize fully oxidized burning, overcome secondary pollution, qualified discharge.

3, adopt suction-type negative pressure to run from garbage storing hole → oven dry → burning → waste heat boiler → gas cleaning → total air-introduced machine whole process, foul smell is not excessive.

In the present invention, utilize clean-burning fume afterheat as the heating source of drying rubbish, partial fume is made to be circulated in drying oven → mistake hopper → incinerator → secondary combustion chamber → waste heat boiler → air-heater → drying oven, both economized on resources and additionally reduced smoke discharge amount, for continual and steady qualified discharge provides reliable technique and strong technical support.Drying oven and the incinerator of twin-roll incinerator separate design, independent operating.Utilize fume afterheat as heating source, have very important practical significance: improve calorific value, reach 6000KJ/kg, ensureing not need to add auxiliary fuel can rubbish spontaneous combustion continually and steadily, reduction energy consumption; Improve handling rate more than 70%, the Large Furnace making single seat revolving burner maximum throughput rise to > 500T/D by 300T/D, significantly reduces operating cost; For the continual and steady high-temp combustion of incinerator and Thorough combustion provide reliable and stable fuel, avoid temperature fluctuation; For continual and steady qualified discharge lays solid material base; Reduce smoke discharge amount, guarantee constant qualified discharge.Adapt to that developing countries compostings is not classified, water content and high containing ash, calorific value is low, is unfavorable for the garbage property burnt.

Adopt twin-roll incinerator of the present invention, through national CMA(China Metrology Accreditation china metrology Accreditation/accreditation) mechanism on-the-spot emission sample detecting, bioxin, heavy metal be completely up to standard, (concentration of emission of table 1) ， bioxin and heavy metal occupy world lead level to concrete testing result.

Table 1 autonomous innovation rotary incinerator discharge testing result compares with national standard and European standard

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the rotary formation of twin-roll incinerator of the present invention and the structural representation of flue gas purification system;

Fig. 2 is the structural representation of rotary twin-roll incinerator of the present invention;

Fig. 3 is that the A-A of Fig. 2 is to structure sectional view;

Fig. 4 is the burning drums inside combustion flame direction schematic diagram of rotary twin-roll incinerator of the present invention.

In figure 1, drying roller; 2, cylinder is burned; 3, secondary combustion chamber; 4, waste heat boiler; 5, hopper; 6, pipeline; 7, screening section; 8, hopper; 9, raceway; 10, raceway; 11, Secondary Air preheating device; 12, air-heater; 13, air-introduced machine; 14, conveying worm; 15, ash discharging hole; 16, automatic on/off mechanism; 17, radial oxygen supply device; 18, roller; 19, incinerator drive end bearing bracket; 20, refractory brick; 21, Secondary Air preheating device; 22, pusher; 23, radial oxygen supply device; 24, feeding hopper; 25, hopper is crossed; 26, roller; 27, drying oven drive end bearing bracket; 28, hole is sieved; 29, lifting blade is promoted; 30, axial flow First air; 31, steam valve; 32, boiler flue gas outlet place; 33, smoke pipe; 34, front diffusion dust arrester; 35, water-cooling apparatus; 36, rear diffusion dust arrester; 37, cyclone dust collectors; 38, bag-type dust machine; 39, total air-introduced machine; 40, chimney; 41, pusher; 42, dual firing chamber; 43, spiral send slag machine; 44, pipeline; 45, pipeline; 46, drying oven rear end cap; 47, incinerator rear end cap.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

As shown in Figure 2, twin-roll incinerator of the present invention, as shown in Figure 2, drying roller (drying oven) 1 is supported in raceway 9 by four rolling 26 and is positioned at directly over burning cylinder 2, burns cylinder 2 and is also supported in raceway 10 by four rolling 18.Drying roller 1 and burning cylinder 2 are by independently transmission mechanism 26,18 driving rotating operation acting separately.

Drying roller (drying oven) 1 is closed by drive end bearing bracket 27 and rear end cap 46, being divided into many deciles to be welded with and promoting lifting blade 29, raising rubbish for promoting throwing in cylinder.Rubbish to send in cylinder 1 by hopper 5 through pusher 41, attracted the heat smoke of the smoke outlet 32 of waste heat boiler 4 to be blown in drying roller 1 as the heating source of drying rubbish through smoke pipe 33 by air-heater 12, rubbish heat absorption evaporation and portions under heat decompose, volatilization gasification, oven dry limit, rubbish limit is constantly advanced to screening section 7 by pusher 41, rubbish after screening becomes dry and loose combustibles, the mixing portion carbide of thermal decomposition and fuel gas and axial flow First air 30 sucks together with the foul smell in garbage storing hole via pipeline 6 and is sucked by total air-introduced machine 39, incinerator 2 ignition is entered through hopper 8 and feeding hopper 24, further thermal decomposition, volatilization, gasification, burning, burn hearth inner lining and have refractory brick 20, amount of stored heat is large, temperature is high, carbide and steam carry out water-gas reaction, generate the fuel gas hydrogen (H) of high heating value.The space fully oxidized burning of oxygen in the burner hearth of >=850 DEG C that the multistage radial oxygen supply device 17,23 of these gases and incinerator 2 provides.

Burn cylinder 2(incinerator) closed by rear and front end lid 19,47.Cylinder is by 5 functional section thermal decompositions of burning, catch fire, volatilization gasification, burning, after-flame, configure radial oxygen supply device 17 and automatic on/off mechanism 16 and Secondary Air preheating device 11 respectively, by axial flow First air 30, drying roller 1 provides the air of preheating to suck through hopper 8 and to burn in burner hearth 2 as axial First air, the radial multi-stage Secondary Air that First air 30 and multistage radial oxygen supply device 17 are blown into mix interweave together with form active turbulent flow, because stove rotates the flame (as shown in Figure 3) becoming screw type, very effective prolong smoke is in the oxidizing fire time (>=2S) of high-temperature region (850 DEG C), it is enable to obtain the oxidant of timely and appropriate also pre-heating temperature elevation in the overall process of burning, guarantee fully oxidized burning, flue gas is again by secondary combustion chamber 3 fully after-flame, lime-ash send slag machine 43 by spiral, 14 discharge.Reach and fully decompose poisonous and hazardous organic matter, there is no the material conditions of Sheng Cheng bioxin again.The fume afterheat of abundant after-flame enters waste heat boiler 4, and steam 31 heat energy of generation, for industrial gas or generatings such as heating, heat supplies.

Flue gas purification system, as shown in Figure 1, by diffusion dust arrester 34,36, water-cooling apparatus 35, cyclone dust collectors 37 and bag-type dust machine 38 and pipeline 44,45 etc. form.Finally by total air-introduced machine 39, the waste gas after purification is entered chimney 40 and escape into air.Flue gas purification system does not need to add adsorbent and does not need to configure adsorbent equipment, because flue gas is in burning cylinder 2, employing combustion method is fully decomposed, oxidizing fire purification, so there is not the necessity dropping into full-amount adsorbent purification, can save a large amount of adsorbents.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a rotary twin-roll incinerator, comprise drying roller and burn cylinder, it is characterized in that, drying roller is placed in and burns respective independent operating directly over cylinder, described burning cylinder is communicated with drying roller by waste heat boiler, for drying roller provides the heating source of clean-burning using waste heat from tail gas as drying rubbish, the punishment in advance mouth of described drying roller is communicated with burning cylinder by hopper, is the garbage fuel that burning cylinder provides calorific value high, dry and loose.

2. the rotary twin-roll incinerator of one according to claim 1, it is characterized in that, described drying roller is closed by rear and front end cap seal, in drying roller, weldering studs with lifting blade, and drying roller is supported on raceway by four support rollers, burns cylinder and is also supported on raceway by four support rollers, burn cylinder to be closed by rear and front end cap seal, burn edge refractory brick and the plate that pokes fire in cylinder, axially offer the radial oxygen supply device in 5-7 road along burning cylinder cylindrical, radial oxygen supply device peripheral hardware has air preheating ring.

3. the rotary twin-roll incinerator of one according to claim 1, it is characterized in that, the exit of described drying roller arranges screening section, for sieving the garbage fuel of drying, drying roller is combined with screening section and is integrated, the closing cap of screening section and the rear end cap of drying roller are interconnected, and offer screening thing discharge port, be connected communicate with described punishment in advance mouth below screening section closing cap.

4. the rotary twin-roll incinerator of one according to claim 2, is characterized in that, the lower air porch of the air preheat circle of the radial oxygen supply device of described burning cylinder cylindrical, is connected with the upper end of " U " font ash delivering machine.

5. the smoke circulating system of a rotary twin-roll incinerator, be made up of burning cylinder and secondary combustion chamber, waste heat boiler, fume afterheat pipeline, drying roller, excessively hopper, burn cylinder and secondary combustion chamber, waste heat boiler, fume afterheat pipeline, drying roller, cross hopper and be linked in sequence successively, cross hopper and connect again and burn cylinder and formed and circulate.