型煤是由无烟煤、焦炭粉、稻壳、粘土、脱硫剂(一般为生石灰)、助燃剂按一定比例压制而成的。按要求型煤应有一定的强度,即燃尽后也不应松散。其外形尺寸一般为200mm×200mm×80mm 或100mm×100mm×80mm 的块状,沿厚度方向设有多个通风孔。由于型煤不易松散及其内加入脱硫剂的特性,它燃烧时不像散煤炉那样会带走大量飞灰,而且型煤燃烧后产生的烟气内含硫量较低。因此型煤锅炉的原始排尘浓度、烟气黑度、二氧化硫排放量不经除尘及脱硫处理就可满足 GB 13271—2001《工业锅炉大气污染物排放标准》中一类地区的排放要求。因此,在一些大中城市的环保部门允许在市区内使用燃型煤锅炉。长春市环保部门较早地推广使用燃型煤锅炉。1 燃型煤锅炉的优点1)环保达标,在一些大中城市的市区内,当地环保部门允许使用燃型煤锅炉。2)锅炉运行成本低,操作及维护费用低。单位热当量的价格,型煤较燃油、燃气、电要低得多;燃油、燃气锅炉的电控要求及操作均较燃型煤锅炉复杂。 Briquette is anthracite, coke powder, rice husk, clay, desulfurization agent (usually lime), combustion improver pressed into a certain percentage. According to the requirements of coal should have a certain intensity, that is, after burning should not loose. Its external dimensions are generally 200mm × 200mm × 80mm or 100mm × 100mm × 80mm block, along the thickness direction with a plurality of ventilation holes. Because briquette is not loose and the desulfurizer is added into the briquette, it does not burn a lot of fly ash when it burns, and the flue gas contained in briquette burns less sulfur. Therefore, the raw dust concentration of briquette boilers, flue gas blackness and sulfur dioxide emissions can meet the emission requirements of a type of area in GB 13271-2001 “Emission Standard of Air Pollutants for Industrial Boilers” without dust removal and desulphurization treatment. Therefore, the environmental protection departments in some large and medium-sized cities allow the use of coal-fired boilers in urban areas. Changchun City, the environmental protection department to promote the use of coal-fired boiler earlier. A coal-fired boiler advantages 1) environmental standards, in some urban areas in large and medium-sized cities, the local environmental protection department to allow the use of coal-fired boilers. 2) Boiler operating costs low, low operating and maintenance costs. Unit thermal equivalent price, coal briquette, fuel gas, electricity is much lower; fuel, gas boiler electric control requirements and operations are more complicated than the briquette boiler.