Biomass direct-fired boiler

Abstract

The invention discloses a biomass direct-fired boiler. The biomass direct-fired boiler comprises a boiler body, a feeding system, a discharging system, an out-boiler gas flue, a primary air inlet chamber, a secondary air inlet pipe and a distribution device; a combustion chamber which is formed by membrane type water cooling walls and a multi-return stroke gas flue are arranged in the boiler body; a water cooling vibrating fire grate is arranged at the bottom of the combustion chamber; a steam super-heater is arranged in the multi-return stroke gas flue; the feeding system is communicated with the front wall of the boiler body, and is used for inputting a biomass fuel into the combustion chamber; the discharging system is arranged at the bottoms of the multi-return stroke gas flue and the water cooling vibrating fire grate, and is used for outputting burnout things of the biomass fuel out of the boiler; the out-boiler gas flue is communicated with the top of a tail return stroke gas flue; a coal economizer, a secondary air pre-heater and a primary air pre-heater are arranged in the out-boiler gas flue in sequence in a flue gas flowing direction, and are used for preheating fed water and air and feeding the preheated water and air into the boiler; the primary air inlet chamber is arranged below the water cooling vibrating fire grate; the secondary air inlet pipe and the distribution device are arranged on the side wall of the combustion chamber. According to the biomass direct-fired boiler, the biomass fuel adaptability is wide; the combustion and energy resource conversion efficiency is high; the boiler operates safely and stably; high-efficiency utilization of biomass energy resources is realized.

Description

technical field [0001] The invention relates to a boiler, more specifically to a biomass direct-fired boiler. Background technique [0002] Biomass energy is the solar energy fixed on the earth by the photosynthesis of plants, which is a typical renewable energy source. The use of biomass energy to replace oil, coal, natural gas and other fuels to produce electricity can reduce dependence on fossil energy, protect national energy resources, and reduce environmental pollution caused by fossil energy consumption. [0003] According to statistics, China's coal consumption in 2015 was 3.965 billion tons, accounting for half of the world's total coal consumption, and the proportion of coal in my country's energy consumption structure reached 64%, which was much higher than the world's average coal level of 30%. 2 The total emission exceeds 20 million tons, SO 2 The total emission ranks first in the world, and it faces enormous pressure to reduce emissions. Since the sulfur con...

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Problems solved by technology

[0004] At present, most of the biomass energy in my country is mainly utilized by direct combustion, and the total energy utilization rate is less than 10%, resulting in a huge waste of resources.

With the improvement of farmers' living standards, the construction of new countryside and the advancement of urbanization, the proportion of liquefied petroleum gas used in the vast rural areas has continued to increase, and the crop straw used as fuel has been replaced by a large amount, forming a large amount of surplus, which is left in the field and burned directly , Incineration produces a large amount of smoke that affects road traffic and aviation safety, not only wasting precious resources, but also seriously polluting the environment, and at the same time causing fires and various man-made accidents

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