Boiler for carrying out mixed combustion on carbon black tail gas and coal

Abstract

The invention discloses a boiler for carrying out mixed combustion on carbon black tail gas and coal so as to produce steam for steam supply and power generation. The technical scheme adopted by the invention is as follows: a boiler for carrying out mixed combustion on carbon black tail gas and coal comprises a hearth, a horizontal flue, a tail flue, a combustion device and a slag tapping and ashdischarging device, wherein the hearth, the horizontal flue and the tail flue constitute a square-n-shaped structure; the combustion device comprises an interstratified coal hopper, a clockwise-rotating flake type coal tight grate, and carbon black tail gas combustors; the slag tapping and ash discharging device is arranged below the clockwise-rotating flake type coal tight grate; the lower part of the hearth and two side walls above the clockwise-rotating flake type coal tight grate are respectively provided with a carbon black tail gas combustor; the inside of the horizontal flue is provided with a multistage superheater; and the inside of the tail flue is provided with a coal economizer and an air preheater. By the use of the technical scheme above, the invention solves the existing technical problems, and provides a new boiler for carrying out mixed combustion on carbon black tail gas and coal.

Description

Technical field [0001] The invention belongs to a boiler for mixed combustion of carbon black tail gas and coal to generate steam for steam supply and power generation. Background technique [0002] Carbon black tail gas is a by-product in the carbon black production process. Its calorific value is very low, only 650Kcal / Nm 3 In the past, this gas was rarely used as fuel for boilers, and was usually discharged as exhaust gas to the air. With the rapid development of carbon black production, the output of carbon black tail gas is increasing day by day, and air emissions will cause a great waste of energy and serious environmental pollution. How to effectively use carbon black tail gas has become a major issue to be solved urgently in carbon black production. [0003] Therefore, a newly developed boiler with mixed combustion of carbon black tail gas and coal is developed. The carbon black tail gas is sent to the boiler as fuel. After being mixed and burned with coal, steam is genera...

AI Technical Summary

Problems solved by technology

With the rapid development of carbon black production, the output of carbon black tail gas is increasing day by day, and the emission to the air will cause great waste of energy and serious environmental pollution

Images