Coal-fired boiler flue gas-catalytic regeneration flue gas combined discharging system

Abstract

The present invention relates to a coal-fired boiler flue gas-catalytic regeneration flue gas combined discharging system, which comprises a catalytic regeneration flue gas unit, a coal-fired boiler flue gas unit and a flue gas desulfurization device, wherein the flue gas desulfurization device is provided with a chimney, the catalytic regeneration flue gas unit comprises a catalytic flue gas waste heat boiler, a catalytic flue gas dust collector and a catalytic economizer, the catalytic flue gas waste heat boiler is connected to the catalytic economizer through the catalytic flue gas dust collector, the coal-fired boiler flue gas unit comprises a steam boiler, a steam superheater, a high temperature economizer, a No.1 high temperature pre-heater, a No.2 high temperature pre-heater, a boiler flue gas low temperature economizer, a No.1 low temperature pre-heater, a denitrification device, No.2 low temperature pre-heater boiler, a boiler flue gas dust collector and an induced fan, the steam boiler, the steam superheater, the high temperature economizer, the No.1 high temperature pre-heater, the No.2 high temperature pre-heater, the boiler flue gas low temperature economizer, the No.1 low temperature pre-heater, the denitrification device, the No.2 low temperature pre-heater boiler, the boiler flue gas dust collector and the induced fan are sequentially connected, and the outlets of the catalytic economizer and the induced fan are connected to the flue gas desulfurization device. According to the present invention, the flue gas emission meets the emission standard so as to reduce the air pollution, protect the natural environment, beneficially optimize the resource allocation, reduce the production apparatus occupation area, and reduce the production cost of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment and discharge, and relates to a flue gas discharge system, in particular to a coal-fired boiler flue gas-catalytic regeneration flue gas combined discharge system. Background technique [0002] Exhaust gas emission from petrochemical refineries is one of the main factors of atmospheric environmental pollution. In addition to the flue gas generated during the petroleum processing process, the flue gas emitted by the refinery also includes the flue gas generated by coal-fired boilers. The flue gas generated during the petroleum processing process is mainly The flue gas generated during the catalyst regeneration (combustion) process of the catalytic cracking unit is the catalytic regeneration flue gas. The catalytically regenerated flue gas passes through the flue gas turbine to generate electricity, and the waste heat boiler generates steam to be discharged to the chimney. Catalytic reg...

AI Technical Summary

Problems solved by technology

[0003] SO2 in the desulfurized flue gas after the flue gas of the coal-fired boiler has been treated by limestone-gypsum wet flue gas desulfurization 2 400mg / Nm 3 , NO in flue gas X The concentration of 440mg / Nm 3 , the concentration of dust particles is 50mg / Nm 3 , can not meet the flue gas emission SO 2 The concentration is not more than 50mg / Nm 3 , NO X The concentration is not more than 100mg / Nm 3 , the concentration of dust particles is 20mg / Nm 3 new standard for

[0004] In the prior art, catalytic regeneration flue gas and coal-fired boiler flue gas are processed and discharged separately, which increases the processing equipment and expands the area occupied by the device, which is not conducive to the optimal allocation of resources.

Images