According to the different types of fuel used, the names of boilers are different, so there are coal-fired boilers and gas-fired boilers, which are different types of boilers. So what is the difference between coal-fired and gas-fired boilers except for the different fuels used in the combustion of these two types of boilers? Now let's look at the explanation given by Shandong Gas Boiler.

1.通風(fēng)方式。燃煤鍋爐一般采用負(fù)壓燃燒，基燃燒過程是由鼓風(fēng)機(jī)和引風(fēng)機(jī)的配合來共同完成，煤在燃燒過程中，需要大量的空氣，而由于爐墻煙道的漏風(fēng)，過量空氣系數(shù)可達(dá)2.1-2.5之間。燃?xì)忮仩t采用微正壓或微負(fù)壓燃燒，需要的風(fēng)量小，在燃燒器內(nèi)空氣能較好的與天然氣預(yù)混。微正壓燃燒沒有爐墻和煙道的漏風(fēng)因素，運行中煙道出口空氣系數(shù)可為1.05-1.2。

1. Ventilation mode. Coal-fired boilers usually use negative pressure combustion. The basic combustion process is completed by the combination of blower and induced draft fan. Coal needs a lot of air in the combustion process. Because of the leakage of flue gas in the furnace wall, the excess air coefficient can reach between 2.1 and 2.5. Gas-fired boilers use micro-positive pressure or micro-negative pressure combustion, which requires less air flow, and air in the burner can be better premixed with natural gas. Micro-positive pressure combustion has no air leakage factor of furnace wall and flue, and the air coefficient of flue outlet in operation can be 1.05-1.2.

2.熱損不同。為了讓燃煤鍋爐保持足夠的燃燒力度，需要使用人力或其他設(shè)備不停的往爐膛中添加燃煤，當(dāng)需要間歇性運行的時候，再次啟動時需要較長的時間來提高爐內(nèi)溫度，所以壓火時會產(chǎn)生很大的熱損，而燃?xì)忮仩t啟停十分方便，間歇性運行時能夠快速升溫，從而降低這一過程中的熱損。

2. Different heat loss. In order to make the coal-fired boiler maintain enough combustion intensity, it is necessary to use human resources or other equipment to continuously add coal to the furnace. When intermittent operation is needed, it takes a long time to raise the temperature of the blast furnace when restarting, so there will be a great heat loss when pressing the fire. The gas-fired boiler is very convenient to start and stop, and can quickly raise the temperature during intermittent operation, so as to reduce this. Heat loss in a process.

3.鍋爐自動控制。燃煤鍋爐由于受到煤種、料層厚度、鼓風(fēng)量、引風(fēng)量、風(fēng)煤配比等原因，要做到根據(jù)負(fù)荷來自動調(diào)節(jié)鍋爐運行參數(shù)的難度大。而燃?xì)忮仩t所受影響因素較少，可根據(jù)負(fù)荷調(diào)節(jié)燃燒器閥門大小，容易實現(xiàn)自動控制。

3. Boiler automatic control. It is difficult for coal-fired boilers to automatically adjust the operating parameters of boilers according to load due to the reasons of coal type, material layer thickness, blast volume, induced air volume, air-coal ratio and so on. Gas-fired boilers are affected by fewer factors. The size of burner valve can be adjusted according to the load, which is easy to realize automatic control.

4.排煙不同。燃煤鍋爐使用的燃料就是煤，煤主要是由C、H、O、N、S等元素和灰分及水分組成，當(dāng)煤燃燒之后會產(chǎn)生較大煙塵對環(huán)境造成嚴(yán)重的污染，但是，高穩(wěn)定性的燃?xì)忮仩t在燃燒之后卻沒有黑煙排出，因為燃?xì)饣旧夏軌虮煌耆紵?，排煙的黑毒能夠達(dá)到零林格曼級，里面的SO2含量非常少，所以對環(huán)境沒有什么污染。

4. Smoke exhaust is different. Coal is the fuel used in coal-fired boilers. Coal is mainly composed of C, H, O, N, S, ash and moisture. When coal is burned, it will produce a large amount of smoke and dust, which will cause serious pollution to the environment. However, high-stability gas-fired boilers do not emit black smoke after combustion, because the gas can basically be completely burned, and the black poison of smoke can reach zero Lingman grade. The SO2 content of noodles is very low, so there is no pollution to the environment.

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