Carbon black tail gas incineration boiler with carbon black dry waste gas treatment function

Abstract

The invention discloses a carbon black tail gas incineration boiler with a carbon black dry waste gas treatment function. The carbon black tail gas incineration boiler comprises a carbon black tail gas incineration boiler body and a smoke exhaust pipeline and further comprises a dry waste gas branch way and a smoke and waste gas constant-temperature mixing device. One inlet of the smoke and wastegas constant-temperature mixing device is connected with a smoke outlet of the carbon black tail gas incineration boiler body through a pipeline, and the other inlet of the smoke and waste gas constant-temperature mixing device is connected with a waste gas outlet of the dry waste gas branch way. An outlet of the smoke and waste gas constant-temperature mixing device is connected with an inlet ofthe smoke exhaust pipeline. The carbon black tail gas incineration boiler with the carbon black dry waste gas treatment function is reasonable in design, low in investment and running cost and capableof comprehensively reducing the carbon black production waste gas exhaust environment protection pressure and greatly promoting synchronous development of the treatment technology and the energy-saving and emission-reducing technology of carbon black waste gas.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a novel carbon black tail gas incineration boiler with carbon black dry waste gas treatment, which is mainly used in the comprehensive recovery, treatment and utilization of exhaust gas in the carbon black production process and dry waste gas in the production process, so as to achieve The purpose of energy saving, emission reduction and environmental protection belongs to a high-efficiency and environment-friendly boiler. Background technique [0002] Carbon black tail gas is a by-product of the production process of carbon black, which contains organic mixtures of various hydrocarbons. After the filter, most of the carbon black tail gas is sent to the incineration boiler for incineration and converted into steam and electric energy. The layout structure of the current mainstream carbon black boiler is as follows: figure 1 As shown, the carbon black tail gas is sent to the ① bu...

AI Technical Summary

Problems solved by technology

Since boiler design and manufacture and SCR design are carried out independently, this will inevitably lead to unsatisfactory denitrification effect. In order to ensure the discharge of NOx, the enterprise can only blindly increase the dosage of Nox reagent, which will form on the heating surface behind the denitrification equipment at the boiler tail Fouling and fouling reduce boiler efficiency

In the same way, the discharge temperature of dry exhaust gas is generally about 180°C, so it is completely unable to meet the requirements of denitrification effect, resulting in the situation that environmental protection is not up to standard

Boiler flue gas denitrification equipment and dry waste gas denitrification equipment are arranged separately, resulting in repeated construction of equipment, waste of investment costs and difficulty in achieving results

[0004] To sum up, the defects of existing carbon black tail gas boilers are: 1. Existing boiler flue gas causes great environmental pollution without any treatment, or the boiler flue gas is led out from the middle of the boiler to the external SCR denitrification equipment for treatment and then led back to the boiler, the system is complex High investment cost and operation cost; 2. Existing dry carbon black exhaust gas is discharged directly without any treatment, resulting in serious environmental pollution, or high investment cost for independent treatment; 3. Existing carbon black dry exhaust gas has a low tail gas temperature, which is difficult to achieve SCR denitrification optimal temperature range, denitrification efficiency is extremely low; 4. Existing carbon black boiler burners are not equipped with low-nitrogen burners and other low-nitrogen combustion technologies. The boiler with carbon black and the flue gas denitrification treatment equipment are independent, the structural layout of the boiler body and the tail gas denitrification treatment are not considered uniformly, the actual operation effect is not up to standard, and the environmental protection pressure is high

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