Straw circulation fluidized-bed combustion boiler

A technology of circulating fluidized bed and straw, which is applied in the direction of fluidized bed combustion equipment, fuel for combustion in a molten state, and combustion methods, etc., which can solve the problems of high cost of imported equipment, low combustion efficiency, and large pollutant emissions, and achieve Reduced crushing machinery requirements, low fluidization speed, and good particle size adaptability

Inactive Publication Date: 2007-02-14
SHANDONG GUODIAN TECH CONSULTING +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of straw circulating fluidized bed combustion

Method used

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  • Straw circulation fluidized-bed combustion boiler
  • Straw circulation fluidized-bed combustion boiler
  • Straw circulation fluidized-bed combustion boiler

Examples

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Embodiment 1

[0032] The received base of cotton stalks contains 36.54% carbon, 4.87% hydrogen, 40.54% oxygen, 0.24% nitrogen, 0.13% sulfur, 1.68% ash, 16% moisture, and a low calorific value of 12921.52 kJ / kg. When the boiler is started, the under-bed ignition starting method is adopted. The starting fuel (diesel or natural gas) and the combustion air from the primary fan are burned in the starting combustion chamber 30 to generate high-temperature flue gas. The high-temperature flue gas and mixed air are mixed in the combustion chamber to about 880°C. Enter the water-cooled air chamber 12, and enter the furnace 6 through the water-cooled air distribution plate 11 to heat the bed material (quartz sand, river sand, potassium feldspar or medium corundum, with a particle size distribution of 200 μm to 1 mm). Because the volatile content of cotton stalks is high and the ignition temperature is relatively low, when the bed material is heated to 400° C., the chopped cotton stalk fuel with a leng...

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Abstract

A recirculation fluidized bed combustion boiler of straw is prepared as setting material feed mouth and residue extraction mouth on firepot, setting cooling device being connected to ignition combustion chamber and refeeder with secondary wind opening at bottom of firepot, using water cooling wall with top and bottom collection boxes as side wall of firepot, connecting outlet of firepot to separation device being connected to refeeder and two stages of thermo reduction devices separately, connecting one stage of thermo reduction device to a overheat unit with economizer and preheater as well as setting steam pocket and water supply pipe at top of firepot.

Description

technical field [0001] The invention relates to a novel straw circulating fluidized bed combustion boiler using cotton stalks, corn stalks and branches as fuel, and belongs to the technical field of biomass straw treatment technology and fluidized bed. Background technique [0002] my country's biomass resources are very rich, of which cotton stalks, corn stalks, and branches account for a large proportion. How to efficiently use these agricultural wastes to realize their harmlessness, reduction and recycling has become an important topic at home and abroad. Applying circulating fluidized bed combustion technology to the large-scale treatment of cotton stalks, corn stalks, and tree branches solves the shortcomings of low efficiency and high pollution of traditional treatment methods, and at the same time, it can be used for power generation or heating, replacing some fossil fuels, which will have great impact on my country's energy resources. and environmental protection str...

Claims

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Application Information

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IPC IPC(8): F23C10/00
CPCY02E20/12
Inventor 孟令杰赵春铗李玉晗李大骥赵丽妮张炜东张同金保升赵长遂仲兆平肖睿钟文琪章名耀
Owner SHANDONG GUODIAN TECH CONSULTING
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