2results about How to "Guaranteed emission effect" patented technology

The utility model discloses a kind of thermochemical energy storage reactors, including cylinder, heating device, heat exchange coil subassembly and water vapor distributor, cylinder side is equipped with heat exchange medium inlet pipe, cylinder other side is equipped with heat exchange medium outlet pipe, cylinder inside two sides are equipped with tube sheet, energy storage medium is filled in the shell side between the tube sheet of both sides of cylinder;Heating device is fixed in cylinder inside by several fixed frame;Heat exchange coil subassembly includes helical heat exchange pipe;Water vapor distributor includes concentric ring pipe group being set to both sides of cylinder, the ring pipe of both sides corresponding position is communicated by several steam pipes, and both ends of water vapor distributor each is equipped with two water vapor inlet and outlet.The utility model distributes the multiple steam pipes in water vapor distributor evenly in energy storage medium, enhances the flowability of water vapor in cylinder, strengthens the fluidization of solid particles in cylinder, reduces the degree of solid particle agglomeration, enhances the stability of system operation.

This invention belongs to the technical field of diesel engine aftertreatment systems, and particularly relates to a method for calculating urea injection quantity, a dual-SCR system, an engine, and electronic equipment. The calculation method includes: calculating the conversion efficiency of the pre-stage SCR system based on the first urea injection quantity and the first nitrogen oxide content; obtaining an aging correction coefficient based on a first temperature; calculating the first nitrogen dioxide content after passing through DOC based on the pre-stage SCR conversion efficiency and the aging correction coefficient; calculating the second nitrogen dioxide content after passing through DPF based on the first nitrogen dioxide content; calculating the ratio of nitric oxide to nitrogen dioxide in the second nitrogen oxide content; and calculating the second urea injection quantity before the post-stage SCR system based on the ratio. According to the method for calculating the urea injection quantity before the post-stage SCR system of this invention, the second urea injection quantity can be precisely controlled, ensuring emission performance, avoiding ammonia leakage, reducing urea consumption, and improving economic efficiency.