System for utilizing waste heat of low-concentration combustible material in tail gas of Slapple furnace

Abstract

The invention provides a system and a method for utilizing waste heat of a low-concentration combustible material in tail gas of a Slapple furnace. A Slapple activating furnace (1) is connected with a regenerative chamber (2); a flue is arranged at the tail part of the regenerative chamber (2), and a flue damper (3) is mounted in the flue; a settling chamber (5) is connected with the flue, and air distribution chambers (7) and a heat accumulator (6) for afterburning are mounted in the settling chamber (5), air distribution ports are distributed in the air distribution chamber in an array manner, and a long flue combustion chamber (8) is mounted at the rear parts of the air distribution chambers (7); the tail part of the long flue combustion chamber (8) is connected with a flue gas emission passageway, a heat exchanger (10) and a coal economizer (12) are arranged in the flue gas emission passageway sequentially; and the tail end of the flue gas emission passageway is connected with a desulfurization and dust removing device (15). According to the system and the method, low-grade waste heat is fully utilized, simultaneously, pollutant discharge is reduced, the system reliability is high, and the operation and the maintenance are simple and convenient.

Description

technical field [0001] The invention relates to waste heat utilization of low-concentration combustibles, in particular to the field of waste heat utilization and purification of low-concentration tail gas of a Sleep activation furnace. Background technique [0002] In the process of producing activated carbon by using the Sleep furnace, coal reacts with oxygen or hydrogen or water vapor at high temperature to produce special gas, liquid or solid products, produces a large number of gas by-products, and releases a large amount of heat. At the same time, it will produce low-concentration combustible gas and solid combustible tail gas. Because of its low concentration and temperature, the calorific value is less than 400Kcal / Nm 3 , and due to the limitations of equipment, technology level and other factors, it is difficult to use directly. It is often considered as "exhaust gas" that cannot be directly used. At present, most of them adopt the method of directly exhausting th...

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Problems solved by technology

At present, most of them adopt the method of directly exhausting the atmosphere, which not only pollutes the atmosphere but also causes energy waste.

The invention patent CN200810119157.0 "Comprehensive Utilization Method of Activation Furnace Flue Gas" and the methods adopted in the existing literature do not involve the supplementary combustion and incineration of low-concentration tail gas combustibles, and cannot make full use of the low-concentration combustibles in the tail gas

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