What is the status of nozzle development for gasification and multi-feed slurry gasification technologies at the Northwest Research Institute?
Thread Content
This post was last edited by zzuwangshilei on 2011-5-19 09:57. Introduction to the multi-component slurry gasification technology of the Northwest Research Institute: This new type of slurry gasification technology belongs to the wet-type fluidized-bed pressurized gasification category. It involves carrying out a partial oxidation reaction between solid or liquid carbon-containing materials (including coal/petcoke/asphalt/oil/coal liquefaction residues) and a flowing phase (water, waste liquids, wastewater), using slurries prepared by adding additives such as dispersants, stabilizers, pH regulators, wetting agents, and emulsifiers, in order to produce syngas primarily composed of CO and H2. It seems that the devices used in that facility still rely primarily on coal slurry. If this technology were to use multiple types of feed materials, such as a mixture of coal and municipal waste, would its nozzles be suitable? Could they effectively address the issue of sedimentation during transportation?
I’m not sure whether the following two issues have been completely resolved: 1. Judging from the condition of the slurry at Hualu Hengsheng’s large-scale fertilizer plant, the slurry lacks stability – it separates after being left standing for 1–2 hours. As a result, accidents such as sedimentation in the slurry pipelines and blockages at the inlet of the slurry pumps are likely to occur during operation. 2. During the initial trial operation of Hualu Hengsheng’s large-scale fertilizer pulp production process, when coal and fresh water were used as raw materials for pulp production, the concentration could reach 62%, with values as high as 63% at times. After methanol residues, high-boiling-point alkanes, and waste oil were employed, the concentration began to decline, and there was severe slurry leakage. In particular, high-boiling-point alkanes and waste oil caused agglomeration with the charged particles present in the coal, which led to poor stability and lower concentration of the slurry. Later, improvements were made as a result of modifications, but the slurry concentration still fluctuated frequently. http://bbs.hcbbs.com/viewthread.php?tid=302936&highlight=%B6%E0%D4%AA%C1%CF%BD%AC%C6%F8%BB%AF
Please advise, either from Northwest Institute or Hualu Hengsheng, on how to resolve this going forward