煤質(zhì)的質(zhì)量對(duì)于電蒸汽鍋爐的使用壽命是很有影響的，煤炭的硬性指標(biāo)是煤的熱經(jīng)濟(jì)性，還要考慮到煤質(zhì)對(duì)于鍋爐燃燒設(shè)備的結(jié)構(gòu)、選型、受熱面的布置以及運(yùn)行的經(jīng)濟(jì)性和可靠性因素。
Coal quality for the life of electric steam boilers are very influential, hard targets coal thermal coal economy, also taking into account the structure of the boiler combustion equipment for coal quality, selection, arrangement and operation of the heating surface the economy and reliability factors.
電蒸汽鍋爐http://m.hw5668.cn/在大量使用鍋爐的廠房中為了降低燃燒成本要求選用低揮發(fā)分煤炭的鍋爐，燃用高揮發(fā)分的煤炭，其安全性和經(jīng)濟(jì)性將受到較大影響;煤質(zhì)燃燒后的灰分同樣也是考慮的重點(diǎn)，灰分高會(huì)使火焰?zhèn)鞑ニ俣葴p慢，燃點(diǎn)推遲，燃燒溫度下降，燃燒穩(wěn)定性變差，甚至造成滅火;同時(shí)灰分過(guò)高，還容易加劇設(shè)備的磨損，縮短設(shè)備使用壽命。灰分過(guò)低，在層狀燃燒時(shí)，由于灰渣太薄容易把爐箅燒壞。從灰分的適應(yīng)性看，循環(huán)流化床鍋爐對(duì)灰分適應(yīng)性最強(qiáng)。
In the extensive use of the boiler plant in order to reduce the cost of combustion requires selection of low volatile coal boilers burning high volatile coal, its safety and economy will be severely affected; Coal ash after combustion is also considered focus ash high flame propagation speed will slow down, delayed ignition, combustion temperature drops, the combustion stability deteriorates, causing the fire; at the same time the high ash content, but also easy to increased wear and tear of equipment, shorten equipment life. Ash is too low, when stratified combustion,due to the ash grate is easy to burn out too thin. From the ashes of the adaptability, the circulating fluidized bed boiler ash on the most adaptable.
電蒸汽鍋爐http://m.hw5668.cn/除了看煤炭的揮發(fā)性和灰分外還要注意水分、發(fā)熱量以及排渣方式。煤炭的水分升高，發(fā)熱量降低，鍋爐排煙溫度升高，影響發(fā)電鍋爐的燃燒效率，煤炭在使用之前要進(jìn)行干燥處理和去硫處理，以免影響煤燃燒的熱效率和污染空氣。煤的發(fā)熱量要結(jié)合鍋爐的設(shè)計(jì)，過(guò)高或過(guò)低都不是太好的，要選擇合適的煤炭發(fā)熱量。懸浮燃燒采用液態(tài)排渣方式，一般使用灰熔融性偏低的煤。
Besides watching volatile coal and ash also pay attention to the outside moisture, heat and slagging mode. Coal moisture increases, reduce heat, the boiler flue gas temperature, the influence of the boiler combustion efficiency power generation, coal should be dried before use and to sulfur treatment, to avoid affecting the thermal efficiency of coal combustion and air pollution.Calorific value of coal in conjunction with boiler design, high or low is not very good, and to select the appropriate calorific value of coal. Suspension using slagging combustion mode, the general use of coal ash fusion low.
