Gas hot-blast stove belongs to the hot-blast stove of thermodynamic machinery. Only by using hot air as medium and carrier can it improve the heat utilization rate and thermal working effect more greatly. The main business of the manufacturer is gas hot-blast stove and hot-blast stove. The high conversion rate of gas-fired stoves in industrial heat energy is not high, which is an important factor for many industrial users to consider when choosing and purchasing gas-fired stoves. Does the gas hot blast stove manufactured by the manufacturer have high conversion rate in industrial heat energy? The following is an experiment of thermal energy conversion by our company. 厂家采用自行搭建的实验室小型熔渣热载体煤气化热态实验平台,经研究发现：熔渣热载体煤气化系统对煤种和粒度有很强的适应性,其适合于我国低碳、高灰分、高挥发份煤种的气化,作为低含碳量、高灰分劣质煤代表的沈南煤在高炉熔渣煤气化系统中可以获得较高CO和H2浓度的合成气,其气化指标与作为优质煤代表的大同煤相差不大,煤气热值可达10000kJ·m-3；CO含量随着气化反应温度的升高而升高,H2随反应温度的升高先升高后下降,煤气热值和气化效率均随气化反应温度的升高先升高后下降,当气化反应温度为1623K时,煤气组分中H2含量最高、煤气热值最高、煤气可燃成分C-H比最小、熔渣热载体煤气化系统气化效率最高；随着化学当量比CO2-C的增加,煤气中CO含量逐渐下降,CO2含量逐渐上升,H2含量先上升后下降,碳转化率逐渐增大,煤气热值先保持平稳而后急速下降,当化学当量比为1.02时,其碳转化率约为0.95,此时H2含量最高,C-H比达到最低值,煤气热值保持在最高值;随着气流速度的增大,煤气中CO和H2含量、煤气热值及碳转化率均先上升后下降,当气流速度为0.14m3-h-1时,熔渣煤气化系统煤气热值最高、碳转化率最高,煤气中的CO和H2也最高；因此综合以上实验结果,该实验中熔渣热载体煤气化系统的最佳气化反应温度为1623K,最佳化学当量比应在1.02附近,最佳气流速度为0.14 m3·h-1。
The manufacturer adopts the laboratory small scale slag heat carrier coal gasification hot state experimental platform built by itself. Through research, it is found that the slag heat carrier coal gasification system has strong adaptability to coal type and particle size. It is suitable for the gasification of low carbon, high ash and high volatile coal in China, and Shennan coal as the representative of low carbon, high ash and low quality coal. The syngas with higher CO and H2 concentration can be obtained in blast furnace slag gasification system. Its gasification index is similar to Datong coal, which is the representative of high-quality coal. The calorific value of gas can reach 10,000 kJ.m-3. CO content increases with the increase of gasification reaction temperature, H2 first increases and then decreases with the increase of reaction temperature, and the calorific value of gas and gasification efficiency are similar. When the gasification reaction temperature is 1623K, the content of H2 in the gas component is the highest, the calorific value of the gas is the highest, the ratio of C-H is the lowest, and the gasification efficiency of the slag heat carrier gasification system is the highest. With the increase of the chemical equivalent ratio of CO2-C, the content of CO in the gas decreases gradually, and the content of CO2 is the highest. Gradually, the content of H2 increases first and then decreases, the carbon conversion rate increases gradually, and the calorific value of gas keeps stable at first and then decreases rapidly. When the chemical equivalence ratio is 1.02, the carbon conversion rate is about 0.95. At this time, the content of H2 is the highest, the C-H ratio is the lowest, and the calorific value of gas keeps the highest. With the increase of gas flow rate, the content of CO and H2 in gas and gas are kept at the highest level. The calorific value and carbon conversion rate both rise first and then decrease. When the gas flow rate is 0.14m3-h-1, the calorific value and carbon conversion rate of the gas in the slag gasification system are the highest, and the CO and H2 in the gas are also the highest. Therefore, based on the above experimental results, the optimum gasification reaction temperature of the slag heat carrier gasification system is 1623K and the optimum chemical equivalence ratio is obtained. The optimum air velocity should be 0.14 m3.h-1 near 1.02.
In addition, the gasification reaction kinetics of granular slag heat carrier was studied by isothermal constant gravity technology, and the reaction kinetics model was established. It was found that the initial gasification reaction temperature of coal char changed with the addition of blast furnace slag. With the increase of blast furnace slag, the initial gasification reaction temperature of coal char decreased gradually, and the initial reaction temperature of inferior coal decreased more. With the increase of gasification reaction temperature, the carbon conversion rate of coal char, the peak reaction rate and the reactivity of coal char indicated. The number and reaction rate constant increased, and the time needed for coal char to complete gasification reaction was shortened. Blast furnace slag had a good catalytic effect on gasification reaction. With the increase of the content of blast furnace slag in coal sample, the conversion rate of coal char, peak reaction rate, reactivity index and reaction rate constant of coal char increased, and the activation energy of coal char decreased gradually.
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