Condensable gaseous substance recycling method and condensable gaseous substance recycling system suitable for tail gas and exhaust gas

Abstract

The invention discloses a condensable gaseous substance recycling method and a condensable gaseous substance recycling system suitable for tail gas and exhaust gas. According to the method, steam or other gaseous substances which are naturally separated from smoke / dust and are positioned above a discharging opening are introduced into a gas delivery pipe through a gas collecting hood positioned above industrial furnace / tower tail gas or smoke discharging opening, the steam or other gaseous substances coming from the gas delivery pipe are mixed with jet water or jet flows of other liquid flow through a liquid-gas mixer, the steam and other gaseous substances are converted into liquid water or other liquid flows to be recycled, and the liquid-gas mixer is used for sucking the steam or other gaseous substances in the gas delivery pipe by negative pressure formed by water or other liquid jet flows. The system comprises the gas collecting hood, the gas delivery pipe, the liquid-gas mixer and a pressurizing circulation pipeline. According to the invention, the structure is simple, the operation is convenient, and the handling capacity is high, and the method and system are not only suitable for the recycling of industrial dead steam or other gaseous substances, but also is particularly suitable for the recycling of steam in smoke of a power station boiler.

Description

technical field [0001] The invention relates to a method for recovering tail gas, steam (water vapor) in flue gas or other gaseous substances suitable for industrial furnaces / towers and a recovery method suitable for tail gas, steam in flue gas or other gaseous substances in industrial furnaces / towers. Recovery systems for gaseous substances. Background technique [0002] There are many sources of steam or other gaseous substances in the tail gas of industrial furnaces / towers and boiler flue gas, including moisture or other liquid fluids contained in raw materials, steam or other gaseous substances produced by reaction or combustion, and The tail gas, steam or other gaseous substances in the flue gas entering the process of wet desulfurization and denitrification will bring great harm to the flue due to the condensation of the kiln / tower exhaust gas and the steam or other gaseous substances in the boiler flue gas. Therefore, it is necessary to control the temperature of the...

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Problems solved by technology

[0002] There are many sources of steam or other gaseous substances in the tail gas of industrial furnaces / towers and boiler flue gas, including moisture or other liquid fluids contained in raw materials, steam or other gaseous substances produced by reaction or combustion, and The tail gas, steam or other gaseous substances in the flue gas entering the process of wet desulfurization and denitrification will bring great harm to the flue due to the condensation of the kiln / tower exhaust gas and the steam or other gaseous substances in the boiler flue gas. Therefore, it is necessary to control the temperature of the tail gas or flue gas above the dew point corrosion, so that all the moisture or other gaseous substances in the tail gas or flue gas can be discharged from the discharge port together with the tail gas or flue gas, so that a large amount of tail gas or flue gas contains The steam or other gaseous substances and heat energy are wasted in vain, especially for power plant boilers, due to the large amount of fuel, and the wet method is currently used for desulfurization and denitrification, the amount of steam discharged in the form of flue gas is very large

[0003] At present, there is still a lack of methods suitable for recovering steam or other gaseous substances in tail gas or flue gas, and it is impossible to separate steam or other gaseous substances from tail gas or flue gas on the ground before being discharged through the discharge pipe, while general industrial furnaces The chimneys of kiln / tower exhaust gas discharge towers and power plant boilers are very high, and the cost of introducing the steam or other gaseous substances discharged from the tail gas or flue gas into the ground equipment for separation and recovery by the existing conventional methods is very high, which is not economical. Feasibility on

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