Discussion on the issue of wastewater gasification

This issue requires a comprehensive analysis, such as where the condensate water goes Whether it meets the standards, and whether the mother liquor tends to scale

This post was last edited by shuker666 on 2019-6-11 at 11:48. The salt content is 0.1 ppm, which is very low; the mother liquor can be sent to a centralized wastewater treatment facility. The heat exchanger should be considered as a backup unit for use in switching purposes； Ammonia content (corrosive): high (ammonia purification), low (ammonia stripping unit); phenol content (toxic): high (phenol extraction), low (the gas after vaporization can be used as a gasifying agent in fixed-bed gasifiers) ； The vaporized steam from this stock cannot be used for conversion, and the catalyst is prone to poisoning ； If phenolic wastewater is to be vaporized for reuse, ammonia and phenols must be removed ； As far as I know, apart from being reused as a gasifying agent, there are no other new uses at the moment ； Note: All types of condensate and similar fluids should be sent to the centralized wastewater treatment facility for processing ；

What potential problems might arise from using the material obtained after defooling and ammonia removal for gasification, as a gasifying agent in a regasification furnace? Is designing a vaporization heat exchanger difficult?

As a gasifying agent, the main concern is ammonia corrosion, which leads to the need to use materials of higher quality for the heat exchangers and their pipelines； Next, the availability of heat sources for the system (to supply heat for ammonia stripping) needs to be considered ； Consider again how much vapor can be used as a vaporizing agent after vaporization (the actual amount of gas required for operation is less than the theoretical value) ； It is necessary to ensure that the temperature of the gasifying agent after mixing is at least 10°C above the dew point temperature, in order to prevent water from being present in the gasifying agent and thus avoid accidents or disruptions to normal production. This process should involve a Lurgi furnace; the jacket generates some saturated steam on its own. If an additional amount of stripping steam (saturated) is added, then the gasifying agent will be a mixture of high-pressure superheated steam from the system, oxygen, steam generated by the jacket, and the stripping steam ； Finally, consider the economic viability (whether wastewater treatment is cost-effective or whether it’s more sensible to use an excess heat source for vaporization; if it’s merely for technical upgrades, then that’s another matter) ； On the other hand, the current environmental situation is severe; if ammonia-containing saturated steam is not utilized properly, it will not only cause environmental problems but also result in losses in terms of energy and money ；