Biomass boiler system capable of saving energy and reducing emission

Abstract

The invention discloses a biomass boiler system capable of saving energy and reducing emission, comprising a dry feeding device, a boiler body, an air preheater and a water supplying preheater. The dry feeding device comprises a spiral feeder and a rotary drier, and the spiral feeder is arranged in the drying chamber in the rotary drier. The boiler body comprises a boiler furnace and a combustion chamber which are mutual connected, the material output end of the spiral feeder is arranged at the material inlet of the boiler furnace, and an exhaust gas outlet is arranged above the rotary drier. The top of the combustion chamber is connected with one end of the flue gas pipeline, the air preheater is arranged on the flue gas pipeline, the other end of the flue gas pipeline is connected with the inlet of a dust precipitation device, and the outlet of the dust precipitation device is connected with the exhaust gas inlet of the drying chamber. A mixing exhaust gas inlet is arranged on the lower side at one end of the water supplying preheater, an exhaust gas outlet is arranged on the upper side at the other end, and the exhaust gas outlet is connected with the mixing exhaust gas inlet. The system of the invention can recover 6 to 8% of the waste heat of the boiler flue gas, and has the advantages of energy saving, environmental protection, safety, and less requirements on the water content of the raw materials.

Description

technical field [0001] The invention relates to a biomass boiler system, in particular to a biomass boiler system for energy saving and emission reduction. Background technique [0002] With the development of society, human beings demand more and more energy, but the reserves of conventional energy such as coal and oil are limited, and the use of these energy sources will cause various environmental problems. For this reason, people began to develop renewable and non-polluting biomass energy, which is matched with biomass boilers. At present, the thermal efficiency of biomass boilers is only about 80%, and the energy utilization rate is low. At the same time, the exhaust gas temperature of existing biomass boilers is generally 180 ° C ~ 150 ° C, and this part of the flue gas energy can account for 7 ~ 7% of the total energy of the boiler fuel. 9%, this part of the heat energy of the flue gas is discharged into the atmosphere, which causes a great waste of energy and also c...

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Problems solved by technology

Mushroom slag and planed slag in food processing plants are mainly composed of biomass with high calorific value such as corn stamens, rice bran, cottonseed husks, sawdust, etc., but the moisture content is as high as 60-70%, so they cannot be directly burned in biomass boilers

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