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新聞動態
 實驗電爐燃料的氣化反應有哪些?

常壓固定實驗電爐,一般以塊狀無煙煤或煙煤和焦炭等為原料,用蒸汽或蒸汽與空氣的混合氣體作氣化劑,生產以一氧化碳和氫氣為主要可燃成分的氣化煤氣。
The atmospheric pressure fixed experimental electric furnace generally takes lump anthracite or bituminous coal and coke as raw materials, and uses steam or the mixture of steam and air as gasifying agent to produce gasified gas with carbon monoxide and hydrogen as the main combustible components.
實驗電爐固體燃料的氣化反應,按爐內生產過程進行的特性分為五層,干燥層——在燃料層頂部,燃料與冷的煤接觸,燃料中的水分得以蒸發;干餾層——在干燥層下面,由于溫度條件與干餾爐相似,燃料發生冷分解,放出揮發分及其它干餾產物變成焦炭,焦炭由干餾層轉入氣化層進行冷化學反應;氣化層——爐內氣化過程的主要區域,燃料中的炭和氣化劑在此區域發生激烈的化學反應,鑒于反應條件的不同,氣化層還可以分為氧化層和還原層。
According to the characteristics of the production process in the furnace, the gasification reaction of solid fuel in the experimental electric furnace is divided into five layers: drying layer - at the top of the fuel layer, the fuel contacts with cold coal, and the moisture in the fuel is evaporated; Retorting layer - under the drying layer, due to the similar temperature conditions with the retort, the fuel is cold decomposed, volatile matter and other retorting products are released, and coke is transferred from the retorting layer to the gasification layer for cold chemical reaction; Gasification layer is the main area of the gasification process in the furnace, where the carbon and gasifying agent in the fuel react fiercely. In view of the different reaction conditions, the gasification layer can also be divided into oxidation layer and reduction layer.


固定實驗電爐制造燃氣,首先使得空氣通過燃料層,碳與氧發生放冷反應以提高溫度。隨后使蒸汽和空氣混合通過燃料層,碳與蒸汽和氧氣發生吸冷和放冷的混合反應以生成煤氣。
In order to produce gas in fixed experimental furnace, firstly, the air passes through the fuel layer, and the carbon and oxygen react with each other to increase the temperature. Then the steam and air are mixed to pass through the fuel layer, and the carbon reacts with the steam and oxygen to produce gas.
從實驗電爐造氣階段的化學反應原理,希望形成有利于蒸汽分解和二氧化碳還原反應的條件,所以可以認為:提高氣化層的厚度和溫度是有利的,適當地降低蒸汽的流速也是很有利的。在碳與蒸汽的化學反應中,增加氣化層厚度、降低氣流速度等措施,可使得反應速度加快,又能使得一氧化碳的含量增加,提高蒸汽分解率。
From the principle of chemical reaction in the gas making stage of experimental electric furnace, we hope to form conditions favorable to steam decomposition and carbon dioxide reduction reaction. Therefore, it can be considered that it is advantageous to increase the thickness and temperature of gasification layer, and it is also advantageous to appropriately reduce the steam flow rate. In the chemical reaction of carbon and steam, increasing the thickness of gasification layer and reducing the gas flow speed can accelerate the reaction speed, increase the content of carbon monoxide and improve the steam decomposition rate.

 
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