Chemical adsorption-based gas phase mercury removal method and special-purpose apparatus

Abstract

The present invention relates to the technical field of a chemical adsorption process and apparatus, and discloses a chemical adsorption-based gas phase mercury removal method and a special-purpose apparatus, the process is performed as follows: first a raw material gas is cooled to 35 DEG C to 55 DEG C, then the cooled raw material gas enters into a separation tank for gas-liquid separation to respectively obtain mercury-containing sewage and mercury-containing gas, and the mercury-containing gas is sent into a drying filter for drying filtering. The chemical adsorption-based gas phase mercury removal method and apparatus effectively solve the high temperature, low pressure and high water-containing gaseous phase mercury removal difficult problem, especially the ethylene glycol regeneration tower top non-condensable gas high temperature, low pressure and high water-containing mercury removal difficult problem, have the characteristics of strong adaptability, low operating costs and high reliability, greatly reduce the gas field production costs, save energy, provide technical support for established ethylene glycol regeneration device gaseous phase mercury removal in China, and lay a basis for application of the low temperature separation dehydration and dehydrocarbon process in mercury-containing gas fields.

Description

technical field [0001] The invention relates to the technical field of chemical adsorption process and its device, and relates to a gas phase mercury removal method based on chemical adsorption and a special device thereof. Background technique [0002] The emission of mercury vapor will cause pollution to the atmospheric environment. It can also accumulate in organisms and enrich along the food chain. It has the characteristics of long-distance transmission pollution, so it is a problem of great concern to the world. Heavy metals are non-degradable. Once discharged, Its pollution is long-term. The "Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution" compiled by the Ministry of Environmental Protection lists heavy metals such as arsenic, lead, mercury, chromium, and cadmium as key targets for prevention and control. The current national standard "Integrated Emission Standards for Air Pollutants" GB16297-1996 clearly stipulates that the m...

AI Technical Summary

Problems solved by technology

[0004]The present invention provides a gas-phase mercury removal method based on chemical adsorption and its special device, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of low-pressure, high-temperature , The supersaturated water-containing gas phase has the problem that the adsorbent performance is very sensitive to free water and liquid droplets when the chemical adsorption method is used for mercury removal, which makes it difficult to remove mercury.

Images