Regarding the Endre furnace and ash fusion, which are both fluidized bed systems, please share your insights on their operation as well as the points that need attention.
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We have a variety of coal sources, all of which can be used with these two types of furnaces. Moreover, the current demand for syngas is not very high, around 30,000 units. Please share your thoughts on whether it’s okay to use these two types of stoves
If both types of furnaces are suitable, the End gasification furnace is more mature, but it requires a high investment. The ash fusion gasification furnace represents a domestic gasification technology; it has recently passed pressure tests at 1.0 MPa and has operated stably for 72 hours. It has passed the technical evaluation with no issues, and its cost is low, so it is worth considering. For a gas production capacity of 30,000 units, the low-pressure ash fusion technology will suffice.
Although the gray pyrolysis gasification furnace at ‘1.0MPa’ has passed the 72-hour test so far, it is still uncertain whether it can operate for extended periods of time. The main intention behind the gray pyrolysis gasification furnace is to make use of a wide range of coal types, by burning locally available coal; the process itself is fairly mature. However, there are still some issues related to the equipment that have not been resolved fundamentally. So it is better to choose an Ender furnace.
If we’re going to work on a project, I personally think it’s better to use Endu~~~ It seems that gray fusion isn’t very mature yet!
Our company currently has one methanol production system with a capacity of 200,000 tons per year. The furnace, with a diameter of 3600 mm, is used for intermittent gas production; coke and brown coal are used as feedstocks, and NHD technology is employed for desulfurization and decarburization. The synthesis takes place at 15 MPa, and three-column distillation is used for purification. Due to the continuous increase in the cost of raw materials, we intend to change our feedstock source in order to maximize profits. However, since our location is far from the raw material sources, we would like to know which gasification technology would be suitable in this case!
The gray pyrolysis gasification furnace has a wide range of coal types it can handle； Ende furnaces require coal with high reactivity, such as lignite and bituminous coal; therefore, introducing this technology in areas with lignite resources is a good option.
There is another issue related to the Endu furnace that requires special attention: the dust content in the gas is extremely high, which makes treatment both difficult and costly. The poster could go to Changshan in Jilin to take a look – they have favorable conditions for this purpose, using pool sedimentation systems; the pools are 400m x 800m in size. The sediment piles up there like mountains, creating a truly spectacular sight.
The Ende furnace technology is relatively more mature. Some technical problems can be solved very well. For example: Currently, gasifying lignite is a good approach for dealing with the by-products, and there are now quite mature technologies available for this purpose! :victory:
The performance of the Changshan Ende furnace is fairly good, and all the relevant parameters are in line with those required for industrial use, which allows for long-term operation. However, the tank used for handling slag, as mentioned by someone above, does contain a significant amount of water. There are also some issues related to the ash polymerization technology that need to be addressed; the content of impurities in the output products is relatively high. Additionally, there are still some equipment-related problems that haven’t been resolved, so the conditions for long-term operation aren’t yet met! I recommend using an Ende furnace – not every manufacturer is capable of conducting experiments of this kind!!! :handshake
The Ende furnace is a technology from abroad; it is relatively mature, but its cost is high. In China, it is used by companies such as Shanxi Lu’an Mining Group, Yulin Coal Chemical Technology Co., Ltd. (which produces 100,000 tons of methanol), Jincheng Coal Industry Group, Shanxi Tianhe Coal Gasification Technology Co., Ltd., and Shanxi Hualu Coal Chemical Co., Ltd. The performance of this furnace is good, and its main advantage is the lower investment cost. You can contact these companies for more information; also keep in mind the need for proper post-treatment of the by-products generated. From a risk perspective alone, it is still recommended that you use Endu stoves! !