Boiler thermodynamic system with smoke wastes as fuels and method thereof

Abstract

The invention discloses a boiler thermodynamic system with smoke wastes as fuels and a method thereof. The system comprises a boiler body, a stokehole hopper, a fire grate, a water-cooled wall pipe, a convection pipe, a coal economizer, an air preheater, an air blower, a dust remover and an induced draft fan; a feeding roller is arranged in the stokehole hopper; a front arch and a back arch are arranged in a combustion chamber; a secondary air device is arranged at the middle part of the combustion chamber; and multiple shock wave dust blowers are arranged on heated surfaces of the water-cooled wall pipe, the convection pipe, the coal economizer and the air preheater. The system can effectively use the smoke wastes of redrying enterprises, and realizes energy recovery and resource reuse; when the boiler thermodynamic system uses the smoke wastes as main fuels, the heat efficiency of a boiler is higher than the heat efficiency of a coal-fired boiler; and the smoke NOx and SO2 and dust emission of the boiler reaches the requirements on a gas-fired boiler in the GB13271-2014 boiler atmospheric pollutant discharge standard.

Description

technical field [0001] The invention relates to a boiler thermal system and a method thereof using smoke-related waste as fuel. Background technique [0002] National Tobacco Law [2006] No. 375 and Guoyan Zhuan [2008] No. 324 promulgated by the State Tobacco Monopoly Administration guide the management of waste tobacco monopoly products. Regarding the disposal of remaining by-products, it is necessary to "strictly implement environmental protection policies. , Actively seek advanced technologies, study the feasibility of processing waste by-products into fuels, fertilizers, etc., and strive to make full use of them.” In order to greatly improve the safety of disposal of waste by-products and realize resource utilization, all the remaining by-products of re-roasting tobacco leaves can be safely destroyed without leaving the factory every year, and energy recovery can be realized. [0003] In 2011, the relevant spirit of the symposium for the general manager of the National T...

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Problems solved by technology

[0006] (1) The hopper in front of the furnace is directly connected to the combustion chamber of the boiler. Once the grate stops running, the unused biomass fuel in the hopper will cause combustion;

[0007] (2) The furnace arch of the combustion chamber is not conducive to heat accumulation. When directly burning biomass fuel, due to the low calorific value and short combustion range of the fuel, the combustion temperature is low, which is not conducive to tar cracking and complete fuel combustion;

[0009] (4) The boiler is not equipped with a soot blowing device. When directly burning smoke-related waste fuel, a large amount of dust will be attached to the water wall tubes, convection tubes, economizers, air preheaters and flue gas return due to the high temperature hot air flow. The heat exchange area such as the corners forms ash and coke, which affects the normal operation of the boiler;

[0010] (5) The economizer and air preheater of coal-fired boilers are all finned heat exchange tubes, and the distance between the heat exchange tubes is small. When burning smoke-related waste fuel, it will be blocked due to serious ash accumulation;

[0011] (6) There is no tar treatment device, so that a small amount of unburned tar blocks the corresponding device of the post-process, causing environmental pollution and affecting normal operation;

[0012] (7) Coal-fired boilers use water film dust collectors, which have little effect on particulate matter in flue gas during biomass combustion, and the sewage discharged from water film dust collectors will pollute the environment due to unsatisfactory particle settlement. And meet the relevant requirements of environmental protection after using biomass fuel for heating

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