Coke oven flue gas waste heat recovery processing system

Abstract

The invention discloses a coke oven flue gas waste heat recovery processing system. The coke oven flue gas waste heat recovery processing system comprises a reactor, a steam pocket, a dust collector and a desulphurization apparatus, a first heat-insulation zone, an isothermal zone and a second heat-insulation zone are arranged in the reactor from up to down, a cold-shocking zone is arranged between the isothermal zone and the first heat-insulation zone as well as the isothermal zone and the second heat-insulation zone, the steam pocket is arranged at one side of the reactor, the steam pocket and a heat exchanger are connected through an upper pipe and a lower pipe, the desulphurization apparatus comprises a desulphurization mechanism, a desulphurization zone, a liquid collecting zone and a separator, a demisting filter screen is arranged at the inner side of the top of the desulphurization apparatus, the desulphurization mechanism is arranged at the lower side of the demisting filter screen, the desulphurization mechanism is vertically arranged by several gas-collecting plates according to certain spacing interval, the dust collector is arranged at the outlet of the top of the desulphurization apparatus, and the dust collector comprises a case, a fan blade apparatus and a hairbrush. The processing system has the advantages that energy consumption is reduced, gas flow velocity is reduced, desulphurization efficiency is increased, and the dedusting efficiency is increased.

Description

technical field [0001] The invention relates to a processing system, in particular to a coke oven flue gas waste heat recovery processing system. Background technique [0002] Coke oven gas, due to its many combustible components, belongs to high calorific value gas, crude gas or raw gas. It refers to a kind of combustible gas produced while coke and tar products are produced after high-temperature dry distillation in a coke oven by using several kinds of bituminous coal to prepare coking coal. It is a by-product of the coking industry. As the world's largest coke producer, China's total coke output reached 447.78 million tons in 2015. Based on the calculation of 0.74 tons of coke and 325 cubic meters of coke oven gas per ton of dry coal, China can produce 2.0×1011 cubic meters of coke oven gas per year. At present, about 70% of coke oven gas is used for coke oven combustion, power generation in thermal power plants and city gas. Coke oven gas contains about 55% to 60% hyd...

AI Technical Summary

Problems solved by technology

Coke oven gas contains about 55% to 60% hydrogen and 23% to 27% methane. Direct combustion will cause a great waste of resources, and at the same time, combustion emissions will also cause air pollution.

The reaction heat generated by the existing coke oven flue gas cannot be used, and water vapor and heating are required, and the desulfurization effect of the generated gas is low, which cannot meet the use requirements

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