{"id":1744,"date":"2021-02-08T12:03:15","date_gmt":"2021-02-08T11:03:15","guid":{"rendered":"https:\/\/mawera.com\/wood-burning-systems\/direct-firing-system-850-to-8000-kw-vfe\/"},"modified":"2025-05-06T15:56:15","modified_gmt":"2025-05-06T13:56:15","slug":"injection-combustion-850-to-5200-kw-vfe","status":"publish","type":"page","link":"https:\/\/mawera.com\/en\/wood-burning-systems\/injection-combustion-850-to-5200-kw-vfe\/","title":{"rendered":"Injection combustion 850 to 5,200 kW | VFE"},"content":{"rendered":"

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<\/div><\/div>
VFE<\/span>

Injection combustion 850 to 5,200 kW<\/h1>\n

The very dry and pul\u00adverised fuel is blown into the ful\u00adly fire\u00adclay-lined, high-qual\u00adi\u00adty insu\u00adlat\u00aded com\u00adbus\u00adtion cham\u00adber via one or more injec\u00adtion pipes. The injec\u00adtion with a spe\u00adcial\u00adly devel\u00adoped com\u00adbus\u00adtion cham\u00adber geom\u00ade\u00adtry ensures opti\u00admum burnout of the fuel as well as the required tur\u00adbu\u00adlence and flow con\u00addi\u00adtions.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

\"MAWERA-Feuerung-VFE\"<\/span><\/div><\/div><\/div>

The specialist for the wood industry<\/h2>\n
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Fuels: <\/strong><\/p>\n

Dusty, very dry fuels from indus\u00adtri\u00adal
\nwood pro\u00adcess\u00ading<\/p>\n<\/div><\/div><\/div><\/div><\/div>

<\/div><\/div>

Blow-in fir\u00ading with high-tem\u00adper\u00ada\u00adture air com\u00adbus\u00adtion for the ener\u00adgetic util\u00adi\u00adsa\u00adtion of pul\u00adverised wood residues from <\/span>wood pro\u00adcess\u00ading.<\/p>\n<\/div><\/div><\/div>

<\/div><\/div><\/div><\/div>

Injec\u00adtion com\u00adbus\u00adtion<\/strong><\/p>\n

The very dry and pul\u00adverised fuel is blown into the ful\u00adly fire\u00adclay-lined, high-qual\u00adi\u00adty insu\u00adlat\u00aded com\u00adbus\u00adtion cham\u00adber via one or more injec\u00adtion pipes. The injec\u00adtion with a spe\u00adcial\u00adly devel\u00adoped com\u00adbus\u00adtion cham\u00adber geom\u00ade\u00adtry ensures opti\u00admum burnout of the fuel as well as the required tur\u00adbu\u00adlence and flow con\u00addi\u00adtions.<\/p>\n

The fuel is blown in accord\u00ading to the injec\u00adtor prin\u00adci\u00adple. This means that no fuel enters the injec\u00adtion fan and there\u00adfore no wear occurs on the fan due to the fuel.<\/p>\n

The heat stor\u00adage in the fire\u00adclay mass ensures the cor\u00adre\u00adspond\u00ading\u00adly high com\u00adbus\u00adtion cham\u00adber tem\u00adper\u00ada\u00adtures, which guar\u00adan\u00adtee very low emis\u00adsion val\u00adues. The hor\u00adi\u00adzon\u00adtal 3\u2011pass flame tube smoke tube boil\u00ader is installed on the com\u00adbus\u00adtion cham\u00adber as a warm or hot water boil\u00ader. Steam boil\u00aders or ther\u00admal oil boil\u00aders can also be sup\u00adplied as required.<\/p>\n<\/div><\/div><\/div>

Designed for the wood indus\u00adtry<\/strong><\/p>\n

The VFE has been spe\u00adcial\u00adly devel\u00adoped for indus\u00adtri\u00adal wood pro\u00adcess\u00ading. Even fuels such as MDF or chip\u00adboard residues pose no prob\u00adlem for the fir\u00ading sys\u00adtem.<\/p>\n

The low-NOX<\/sub> com\u00adbus\u00adtion cham\u00adber is designed with mea\u00adsures on the pri\u00adma\u00adry side, such as air stag\u00ading to reduce NOX<\/sub> emis\u00adsions. The reg\u00adu\u00adla\u00adtion of the pri\u00adma\u00adry air sup\u00adply in com\u00adbi\u00adna\u00adtion with flue gas recir\u00adcu\u00adla\u00adtion ensures sub-sto\u00adi\u00adchio\u00admet\u00adric com\u00adbus\u00adtion in the reduc\u00adtion zone.<\/p>\n

The sec\u00adondary air is sup\u00adplied down\u00adstream of the com\u00adbus\u00adtion chamber\u2018s reduc\u00adtion zone. The cor\u00adre\u00adspond\u00ading com\u00adbus\u00adtion cham\u00adber geom\u00ade\u00adtry in com\u00adbi\u00adna\u00adtion with the com\u00adbus\u00adtion air sup\u00adply ensures high tur\u00adbu\u00adlence and mix\u00ading with the flue gas and thus opti\u00admum oxi\u00adda\u00adtion (CO burnout) of the com\u00adbus\u00adtion gas\u00ades.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Design and accessories<\/h2>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TYPE<\/th>\nPOWER RANGE*<\/th>\n<\/tr>\n<\/thead>\n
850<\/td>\n510 to 850 kW<\/td>\n<\/tr>\n
1100<\/td>\n660 to 1,100 kW<\/td>\n<\/tr>\n
1400<\/td>\n420 to 1,400 kW<\/td>\n<\/tr>\n
1700<\/td>\n510 to 1,700 kW<\/td>\n<\/tr>\n
2100<\/td>\n630 to 2,100 kW<\/td>\n<\/tr>\n
2600<\/td>\n780 to 2,600 kW<\/td>\n<\/tr>\n
3300<\/td>\n990 to 3,300 kW<\/td>\n<\/tr>\n
4200<\/td>\n1,260 to 4,200 kW<\/td>\n<\/tr>\n
5200<\/td>\n1,560 to 5,200 kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*<\/sup>depends on fuel and water con\u00adtent<\/p>\n<\/div>\n<\/div><\/div>

\"MAWERA-Feuerung-VFE\"<\/span><\/div><\/div><\/div><\/div><\/div>
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Design and performance \u2014 VFE<\/h3>\n\n\n\n\n\n\n\n\n\n\n
Mod\u00adel<\/b><\/th>\n850<\/b><\/th>\n1100<\/b><\/th>\n1400<\/b><\/th>\n1700<\/b><\/th>\n2100<\/b><\/th>\n2600<\/b><\/th>\n3300<\/b><\/th>\n4200**<\/b><\/th>\n5200**<\/b><\/th>\n<\/th>\n<\/tr>\n<\/thead>\n
Rat\u00aded heat\u00ading out\u00adput<\/b><\/td>\n850<\/b><\/td>\n1,100<\/b><\/td>\n1,400<\/b><\/td>\n1,700<\/b><\/td>\n2,100<\/b><\/td>\n2,600<\/b><\/td>\n3,300<\/b><\/td>\n4,200<\/b><\/td>\n5,200<\/b><\/td>\nkw<\/td>\n<\/tr>\n
Dimen\u00adsions EBL<\/b><\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Length<\/td>\n4,900<\/td>\n5,200<\/td>\n5,800<\/td>\n5,800<\/td>\n6,150<\/td>\n6,150<\/td>\n7,000<\/td>\n4,006<\/td>\n4,960<\/td>\nmm<\/td>\n<\/tr>\n
Width<\/td>\n2,000<\/td>\n2,050<\/td>\n2,100<\/td>\n2,300<\/td>\n2,300<\/td>\n5,600<\/td>\n2,850<\/td>\n2,326<\/td>\n2,880<\/td>\nmm<\/td>\n<\/tr>\n
Height<\/td>\n4,480<\/td>\n4,710<\/td>\n4,950<\/td>\n5,050<\/td>\n6,120<\/td>\n6,120<\/td>\n6,750<\/td>\n6,900<\/td>\n7,700<\/td>\nmm<\/td>\n<\/tr>\n
Max. oper\u00adat\u00ading pres\u00adsure<\/b><\/td>\n6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		6 or 10*<\/sup>
\nor 16*<\/sup><\/td>\n		bar (\u00fc)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

*<\/sup>on request  <\/span>|  <\/span>**<\/sup>Boil\u00ader with water wall  <\/span>|  <\/span>EBL = Injec\u00adtion com\u00adbus\u00adtion<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div>

VFE<\/h2>\n

Injec\u00adtion com\u00adbus\u00adtion 850 \u2014 5,200 kW<\/p>\n

Design and accessories<\/h2>\n<\/div>
\"MAWERA-Feuerung-VFE\"<\/span><\/div><\/div><\/div><\/div><\/div>

Equipment and accessories<\/h2>\n<\/div><\/div><\/div>

Flue gas re-circulation<\/h3>\n

The exhaust gas is extract\u00aded in the exhaust pipe and fed back into the com\u00adbus\u00adtion cham\u00adber via a fan. This caus\u00ades a reduc\u00adtion in the flame tem\u00adper\u00ada\u00adture and a reduc\u00adtion in nitro\u00adgen oxides. The effi\u00adcien\u00adcy of the sys\u00adtem is increased, as a low resid\u00adual oxy\u00adgen con\u00adtent in the flue gas can be achieved even with dry fuels.<\/p>\n

Measurements of the primary and recirculation air<\/h3>\n

The vol\u00adume flows of the pri\u00adma\u00adry and recir\u00adcu\u00adla\u00adtion air are mea\u00adsured and the required air vol\u00adumes are cal\u00adcu\u00adlat\u00aded in advance. This enables opti\u00admum com\u00adbus\u00adtion results and emis\u00adsion val\u00adues to be achieved at all load lev\u00adels, even with dif\u00adfi\u00adcult fuels.<\/p>\n<\/div><\/div><\/div>

Use of high-quality O2<\/sub> probes<\/h3>\n

The sec\u00adondary air vol\u00adume flow is reg\u00adu\u00adlat\u00aded to the actu\u00adal oxy\u00adgen val\u00adue. The use of high-qual\u00adi\u00adty O2<\/sub> probes enables a con\u00adstant\u00adly low resid\u00adual oxy\u00adgen con\u00adtent in the flue gas (approx. 5\u20136 % O2<\/sub> (wet) \u2014 depend\u00ading on the fuel). This enables max\u00adi\u00admum effi\u00adcien\u00adcy to be achieved even in mod\u00adu\u00adlat\u00ading par\u00adtial load oper\u00ada\u00adtion.<\/p>\n

Ash removal<\/h3>\n

Very lit\u00adtle ash is pro\u00adduced in the com\u00adbus\u00adtion cham\u00adber as a result of the air com\u00adbus\u00adtion. Ash is removed from the com\u00adbus\u00adtion cham\u00adber man\u00adu\u00adal\u00adly or auto\u00admat\u00adi\u00adcal\u00adly via a water-cooled screw.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Take advantage of these benefits:<\/h3>\n