{"id":1822,"date":"2021-02-08T12:03:35","date_gmt":"2021-02-08T11:03:35","guid":{"rendered":"https:\/\/mawera.com\/wood-burning-systems\/stepped-grate-firing-system-850-to-10000-kw-srt\/"},"modified":"2025-10-08T11:32:08","modified_gmt":"2025-10-08T09:32:08","slug":"step-grate-combustion-850-to-10000-kw-srt","status":"publish","type":"page","link":"https:\/\/mawera.com\/en\/wood-burning-systems\/step-grate-combustion-850-to-10000-kw-srt\/","title":{"rendered":"Step grate combustion 850 to 10,000 kW | SRT"},"content":{"rendered":"

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SRT<\/span>

Step grate combustion 850 to 10,000 kW<\/h1>\n

The step grate com\u00adbu\u00adtion is par\u00adtic\u00adu\u00adlar\u00adly suit\u00adable for the com\u00adbus\u00adtion of wood fuels with a high water con\u00adtent of up to 60 % and an ash con\u00adtent of up to 10 %. These con\u00addi\u00adtions allow the flex\u00adi\u00adble use of inex\u00adpen\u00adsive, not pre-dried fuels such as green cut, bark, wood from land\u00adscape cul\u00adti\u00adva\u00adtion and waste wood. The wood com\u00adbus\u00adtion sys\u00adtem SRT with step grate is designed for con\u00adtin\u00adu\u00adous oper\u00ada\u00adtion of up to 8,000 hours per year.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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Designed for continuous operation<\/h2>\n
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Fuels:
\n<\/strong>Wood from land\u00adscape cul\u00adti\u00adva\u00adtion
\nbark
\ngreen cut
\nwaste wood
\nshort rota\u00adtion wood
\nspe\u00adcial fuels<\/p>\n<\/div><\/div><\/div><\/div><\/div>

<\/div><\/div>

The SRT is par\u00adtic\u00adu\u00adlar\u00adly suit\u00adable for the com\u00adbus\u00adtion of wood fuels with a high water and ash con\u00adtent. These require\u00adments enable flex\u00adi\u00adble use of afford\u00adable, not pre-dried fuels.<\/p>\n<\/div><\/div><\/div>

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

Flue gas recir\u00adcu\u00adla\u00adtion \u00bbover\u00ab and \u00bbbelow\u00ab grate<\/strong><\/p>\n

The flue gas is sucked in the exhaust pipe and fed via a fan of the com\u00adbus\u00adtion cham\u00adber \u00bbover\u00ab or \u00bbbelow\u00ab the grate again. This caus\u00ades a reduc\u00adtion of the flame tem\u00adper\u00ada\u00adture and a reduc\u00adtion of nitro\u00adgen oxides. The effi\u00adcien\u00adcy of the sys\u00adtem is increased because a low\u00ader resid\u00adual oxy\u00adgen con\u00adtent in the exhaust gas can be used even with dry fuels. In flue gas recir\u00adcu\u00adla\u00adtion \u00bbbelow\u00ab grate, the recir\u00adcu\u00adlat\u00aded exhaust gas is mixed in mix\u00ading cham\u00adbers with pri\u00adma\u00adry air and fed back under the grate. The flue gas recir\u00adcu\u00adla\u00adtion \u00bbbelow\u00ab grate also improves burnout and pre\u00advents slag\u00adging on the grate.<\/p>\n<\/div><\/div><\/div>

Low\u00adest life cycle costs<\/strong><\/p>\n

We attach great impor\u00adtance to dura\u00adbil\u00adi\u00adty and a long ser\u00advice life of the sys\u00adtem. That\u2018s why we rely on a robust sys\u00adtem tech\u00adnol\u00ado\u00adgy. Sol\u00adid steel con\u00adstruc\u00adtion and the use of high-qual\u00adi\u00adty lin\u00ading mate\u00adr\u00adi\u00adal guar\u00adan\u00adtee reli\u00adable plant avail\u00adabil\u00adi\u00adty over many years. Low\u00adest pow\u00ader con\u00adsump\u00adtion in all load con\u00addi\u00adtions of the plant is guar\u00adan\u00adteed by fre\u00adquen\u00adcy-con\u00adtrolled screws, grate dri\u00adves and exhaust gas recir\u00adcu\u00adla\u00adtion.<\/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\n\n\n
TYPE<\/th>\nPOWER RANGE*<\/th>\n<\/tr>\n<\/thead>\n
850<\/td>\n170 to 850 kW<\/td>\n<\/tr>\n
1100<\/td>\n220 to 1,100 kW<\/td>\n<\/tr>\n
1400<\/td>\n280 to 1,400 kW<\/td>\n<\/tr>\n
1700<\/td>\n340 to 1,700 kW<\/td>\n<\/tr>\n
2100<\/td>\n420 to 2,100 kW<\/td>\n<\/tr>\n
2600<\/td>\n520 to 2,600 kW<\/td>\n<\/tr>\n
3300<\/td>\n660 to 3,300 kW<\/td>\n<\/tr>\n
4200<\/td>\n840 to 4,200 kW<\/td>\n<\/tr>\n
5200<\/td>\n1,040 to 5,200 kW<\/td>\n<\/tr>\n
6500<\/td>\n1,300 to 6,500 kW<\/td>\n<\/tr>\n
8000<\/td>\n1,600 to 8,000 kW<\/td>\n<\/tr>\n
10000<\/td>\n2,000 to 10,000 kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

\"MAWERA-SRT-finzelberg\"<\/span><\/div><\/div><\/div><\/div><\/div>
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Design and performance \u2014 SRT<\/h3>\n\n\n\n\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>\n6500<\/b><\/th>\n8000<\/b><\/th>\n10000<\/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>\n6,500<\/b><\/td>\n8,000<\/b><\/td>\n10,000<\/b><\/td>\nkW<\/td>\n<\/tr>\n
Dimen\u00adsions SE<\/b><\/td>\n<\/td>\n<\/td>\n<\/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>\n4,910<\/td>\n4,910<\/td>\n5,223<\/td>\n5,223<\/td>\n5,898<\/td>\n5,898<\/td>\n6,573<\/td>\n6,573<\/td>\n7,573<\/td>\n7,573<\/td>\n8,853<\/td>\n9,813<\/td>\nmm<\/td>\n<\/tr>\n
Width<\/td>\n2,100<\/td>\n2,100<\/td>\n2,100<\/td>\n2,300<\/td>\n2,300<\/td>\n2,600<\/td>\n2,850<\/td>\n2,860<\/td>\n2,880<\/td>\n3,600<\/td>\n3,700<\/td>\n4,200<\/td>\nmm<\/td>\n<\/tr>\n
Height<\/td>\n5,475<\/td>\n5,475<\/td>\n5,927<\/td>\n6,127<\/td>\n7,200<\/td>\n7,200<\/td>\n8,235<\/td>\n7,725<\/td>\n9,085<\/td>\n9,825<\/td>\n10,422<\/td>\n11,206<\/td>\nmm<\/td>\n<\/tr>\n
Dimen\u00adsions ESH<\/b><\/td>\n<\/td>\n<\/td>\n<\/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>\n5,272<\/td>\n5,272<\/td>\n5,590<\/td>\n5,590<\/td>\n6,431<\/td>\n6,431<\/td>\n6,724<\/td>\n6,724<\/td>\n7,721<\/td>\n7,721<\/td>\n9,001<\/td>\n9,961<\/td>\nmm<\/td>\n<\/tr>\n
Width<\/td>\n2,100<\/td>\n2,100<\/td>\n2,100<\/td>\n2,300<\/td>\n2,300<\/td>\n2,600<\/td>\n2,850<\/td>\n2,860<\/td>\n2,880<\/td>\n3,600<\/td>\n3,700<\/td>\n4,200<\/td>\nmm<\/td>\n<\/tr>\n
Height<\/td>\n5,475<\/td>\n5,475<\/td>\n5,927<\/td>\n6,127<\/td>\n7,200<\/td>\n7,200<\/td>\n8,235<\/td>\n7,726<\/td>\n9,085<\/td>\n9,825<\/td>\n10,422<\/td>\n11,206<\/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		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
\nSE = Screw feed
\nESH = Feed neck<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div>

SRT<\/h2>\n

Step grate com\u00adbus\u00adtion 850 \u2014 10,000 kW<\/p>\n

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

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

Measurements of primary and recirculated air<\/h3>\n

In order to ensure opti\u00admal com\u00adbus\u00adtion results and emis\u00adsion val\u00adues in all load lev\u00adels, even with dif\u00adfi\u00adcult fuels, the vol\u00adume flows of the pri\u00adma\u00adry air and flue gas recir\u00adcu\u00adla\u00adtion are mea\u00adsured and the required air quan\u00adti\u00adties are cal\u00adcu\u00adlat\u00aded in advance. The grate of the SRT is divid\u00aded into four inde\u00adpen\u00addent pri\u00adma\u00adry air zones. As a result, the required air vol\u00adumes can be adapt\u00aded to the fuel.<\/p>\n

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. Through the use of high qual\u00adi\u00adty O2<\/sub> probes a con\u00adstant low resid\u00adual oxy\u00adgen con\u00adtent in the exhaust gas is pos\u00adsi\u00adble (about 4\u20135 % O2<\/sub> (moist) \u2013 depend\u00ading on the fuel). As a result, high\u00adest effi\u00adcien\u00adcies are achieved even in mod\u00adu\u00adlat\u00ading part-load oper\u00ada\u00adtion.<\/p>\n<\/div><\/div><\/div>

Automatic ash removal<\/h3>\n

Depend\u00ading on fuel and ash con\u00adtent, var\u00adi\u00adous vari\u00adants are avail\u00adable for the ash removal of the com\u00adbus\u00adtion cham\u00adber as well as cyclone and the elec\u00adtro\u00adsta\u00adt\u00adic pre\u00adcip\u00adi\u00adta\u00adtor. The ash can be dis\u00adcharged togeth\u00ader or sep\u00ada\u00adrate\u00adly. The removal is car\u00adried out in con\u00adtain\u00aders up to 800 l or in skips of 5.5 to 12 m2<\/sup>. In addi\u00adtion, the ash removal is also pos\u00adsi\u00adble in big bags.<\/p>\n

The fol\u00adlow\u00ading vari\u00adants are avail\u00adable:<\/strong><\/p>\n