2results about How to "Avoid secondary entrainment" patented technology

This invention discloses a static mixer and an SCR flue gas denitrification ammonia injection mixing system. The static mixer is installed in the flue and includes multiple static mixing components, a groove, and a second row of ash pipes. Each static mixing component includes: a narrowing section, which is a hollow tubular structure with an upper opening area smaller than its lower opening area; a guide section located above the narrowing section; and at least one turbulence section, which is a concave hollow structure with an upper opening located below or inside the narrowing section, with its bottom connected to the first row of ash pipes. The first row of ash pipes is used to discharge dust from the turbulence section into the flue. This invention can improve the uniformity of ammonia mixing with flue gas while removing dust from the flue gas, thereby mitigating blockage of ammonia nozzles, catalyst bed pores in flue gas denitrification technology, and downstream equipment, thus reducing ammonia escape and effectively overcoming a series of problems caused by ammonia escape.

This invention discloses a pretreatment process for dry gas from ethylbenzene production. The steps are as follows: the dry gas from ethylbenzene production sequentially enters a dry gas separator and coalescer, a dry gas water washing tower, a water-washed dry gas cooler, and a water-washed dry gas separator to remove organic amines and / or ammonia carried in the dry gas. The dry gas water washing tower is arranged from bottom to top as a first water washing section, a second water washing section, a third water washing section, ..., N water washing sections, where N≥2. A collection tank is set between two adjacent water washing sections. The bottom plate of the collection tank is equipped with a riser hole and a riser pipe to connect the two adjacent water washing sections. Each water washing section is arranged from bottom to top as a structured packing section and a water washing water distributor. The dry gas water washing adopts a multi-stage water washing process. Each stage of water washing uses a water washing circulation pump to circulate the water washing water. A water washing water filter is installed on the water washing water circulation pipeline of each stage. The water washing water adopts a method of partial circulation, continuous discharge, and continuous water replenishment. Using this invention, the amount of alkaline substances carried in the dry gas of ethylbenzene production feedstock can be effectively removed.