How is the 180t/d gasification unit, with Huaneng furnaces featuring downward cooling at each burner? Is it too small?
Thread Content
The gasifier has a cylindrical structure with a water-cooled furnace chamber. There is a vertically arranged combined nozzle at the upper part of the furnace chamber. The coal powder coming from the coal powder feed bin, along with the high-pressure nitrogen/CO2 used to transport it, is sent into the nozzle. Oxygen from the air separation unit enters the nozzle. In the reaction zone of the gasifier, the coal powder injected through nozzles reacts with oxygen to undergo gasification. The high-temperature gas produced as a result of this reaction (1400°C–1600°C) moves downward from the upper part of the gasifier, passes through downcomers, and enters a quench water tank filled with quench water. The coal gas exits the gasifier after passing through this quench water and proceeds to the wet scrubbing unit. As the coal gas passes through the quench water, it is cooled by the quench water to around 185°C; at the same time, most of the ash and slag contained in the gas are washed away by the quench water. The washed slag enters the slag discharge unit along with the quench water, while the fine ash is discharged along with the black water from the quench tank into the water treatment unit.
With such a small furnace, I wonder what is being produced downstream
Chengdu GaoKeda Technology Co., Ltd., the market development company under Huaneng Qingneng Institute, signed a cooperation agreement with Qingdao Sanlibenuo Chemical Industry Co., Ltd. regarding the use of dry coal powder pressurized gasification furnaces (quench type) for the production of syngas and hydrogen. The plant that is set to begin operations this time will supply syngas and hydrogen to Qingdao Sanli Benno Chemical Industry Co., Ltd.’s 10,000 tons per year pentanal and 10,000 tons per year isopentanal production facilities. It can also be used by small and medium-sized chemical enterprises for the production of products such as ammonia, methanol, and dimethyl ether, as well as for technical upgrades related to fixed-bed batch gas generation. It is understood that the minimum scale of dry coal powder pressurized gasification units abroad is 750 tons per day. Through thorough market research, Huaneng Qingneng Institute found that small and medium-sized fertilizer manufacturers have a relatively low demand for gas, generally less than 40,000 standard cubic meters per hour. Current fluidized-bed gasification technology does not offer compact gasifiers that can meet this requirement; as a result, many small and medium-sized fertilizer manufacturers are forced to use relatively outdated fixed-bed systems such as gas generators. These systems result in low efficiency in coal utilization and make it difficult to meet environmental standards, hence technological upgrades are urgently needed.
A furnace this small can’t have very high gas production efficiency, right?
Miniature dry powder gasification furnace, designed for small customer groups. Currently, several companies in the domestic market are competing for this market, mostly those dealing with low voltage.
With such a small gasifier, the economic efficiency may not be good.
Fine chemicals should be useful; the operating costs are relatively high, I guess