Hydrate-based particulate matter/waste gas synergistic removal system and method

Abstract

The invention discloses a hydrate-based particulate matter / waste gas synergistic removal system and method. Particulate matters / coking waste gas can be synthesized into a gas hydrate by utilizing R134a, so that particulate matters / coking waste gas synergistic removal can be realized in a pollution-free and low-energy-consumption manner. The system comprises a waste heat recovery device, a hydratefirst-stage dust removal tower, a solid-liquid separation first-stage tower, a hydrate second-stage dust removal tower, a solid-liquid separation second-stage tower, a hydrate decomposition tank, a gas-solid separation tower and a low-temperature fractionation device. According to the system, various harmful substances such as heavy metals and coking waste gas can be removed while particulate matters are removed, compared with an existing particulate matter control and waste gas treatment device, a hydrate method device is greatly simplified, various pollutants can be effectively removed, andenergy conservation and environment protection are achieved.

Description

technical field [0001] The invention belongs to the field of atmospheric particle control, in particular to a hydrate-based particle / exhaust gas collaborative removal system and method. Background technique [0002] Iron and steel production is one of the main sources of particulate matter and polluted waste gas in various industrial productions in my country. According to the "China Environmental Statistical Yearbook Data", in 2014, the annual emission of particulate matter from iron and steel in the country reached 9.4x10 5 tons of sulfur dioxide, nitrogen oxides and other exhaust gases up to 3.1x10 5 Coking production is one of the largest sources of air pollution in the iron and steel industry. Coking production not only produces a large number of micro-nano particles, but also produces a large number of volatile components, such as raw gas. Coke is the main product of coking, and a large amount of hydrocarbons, sulfides, cyanides, ammonia, dust and other air pollutant...

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Problems solved by technology

The effects of the above methods of particle capture are greatly limited by particle size. In the actual production process, the particle size distribution of particles / coking waste gas produced by coking plants is very wide. The current particle condensation technology is not suitable for micron The agglomeration efficiency of super-grade particles is very high, which can reach 99.99%, but the agglomeration efficiency is positively correlated with the particle size, especially when the collection efficiency of particles below 10nm is less than 40%. At this time, the above method can no longer effectively capture particles / Coking waste gas for cleaning

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