1. Combustion mode

循環流化床燃煤鍋爐是將煤通過破碎設備，經皮帶進煤倉，通過給煤機利用播煤風，撒入爐膛;通過循環灰加熱，流態化燃燒過程。而煤改氣後將焦爐煤氣和馳放氣混合合由四個燃燒器噴入直接燃燒。

Circulating fluidized bed coal-fired boiler is the coal through the crushing equipment, through the belt into the coal bunker, through the coal feeder use of coal sowing air, into the furnace; through circulating ash heating, fluidized combustion process. After changing coal to gas, coke oven gas and purge gas are mixed and injected into four burners for direct combustion.

2、燃燒產物

2. Combustion products

煤主要是由C、H、O、N、S等元素和灰分及水分組成，煤燃燒放出熱量後，生成SO2、SO3、NOx灰分和水分，而SO2、SO3、NOx由煙氣排入大氣，汙染環境，對人類造成危害。而天然氣的主要成分是CO和H2，經過燃燒後，主要生成CO2和H2O，相對燃煤鍋爐燃氣鍋爐的排放SO2、SO3、NOx要少得多。

Coal is mainly composed of C, h, O, N, s and other elements, ash and moisture. After coal combustion gives off heat, it generates SO2, SO3, NOx ash and moisture, while SO2, SO3 and NOx are discharged into the atmosphere by flue gas, polluting the environment and causing harm to human beings. The main components of natural gas are CO and H2. After combustion, they mainly generate CO2 and H2O, which are much less than the emission of SO2, SO3 and NOx from coal-fired boiler and gas-fired boiler.

3、通風方式

3. Ventilation mode

燃煤鍋爐一般采用負壓燃燒，基燃燒過程是由鼓風機和引風機的配合配合的配合來共同完成，煤在燃燒過程中，需要大量的空氣，而由於爐牆煙道的漏風，過量空氣係數可達2.1-2.5之間。燃氣鍋爐采用微正壓或微負壓燃燒，需要的風量小，在燃燒器內空氣能較好的與天然氣預混。微正壓燃燒沒有爐牆和煙道的漏風因素，運行中煙道出口空氣係數可為1.05-1.2。

The coal-fired boiler generally adopts negative pressure combustion, and the basic combustion process is completed by the cooperation of blower and induced draft fan. In the combustion process of coal, a large amount of air is required. Due to the air leakage of furnace wall flue, the excess air coefficient can reach 2.1-2.5. The gas-fired boiler adopts micro positive pressure or micro negative pressure combustion, which requires small air volume and can be premixed with natural gas in the burner. Micro positive pressure combustion has no air leakage factor of furnace wall and flue, and the air coefficient of flue outlet can be 1.05-1.2 during operation.

4、燃料易爆性

4. Fuel explosibility

燃煤鍋爐燃燒，爐膛不易發生爆炸危險。而燃氣鍋爐在爆炸濃度界限內，遇到明火就會發生爆炸。危險性較大。

The combustion of coal-fired boiler is safe and the furnace is not easy to explode. However, the gas-fired boiler will explode in case of open fire within the explosion concentration limit. High risk.

5、鍋爐自動控製

5. Boiler automatic control

燃煤鍋爐由於受到煤種、料層厚度、鼓風量、引風量、風煤配比等原因，要做到根據負荷來自動調節鍋爐運行參數的難度大。而燃氣鍋爐所受影響因素較少，可根據負荷調節燃燒器閥門大小，容易實現自動控製。

Due to the coal type, material layer thickness, blast volume, induced air volume, air coal ratio and other reasons, it is difficult to automatically adjust the boiler operating parameters according to the load. The gas-fired boiler is affected by less factors, so the size of burner valve can be adjusted according to the load, which is easy to realize automatic control.

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This article is compiled and released by Shandong gas fired boilers. Do you have any understanding of these contents? For more information, please click: //www.ysyfd.com We'll have a lot more to see.