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An ultra-low temperature exhaust gas energy-saving boiler

A technology for ultra-low temperature and boilers, applied in lighting and heating equipment, etc., can solve the problems of low fuel utilization efficiency, high carbon content in fly ash, high dust concentration, etc., to improve utilization rate, reduce SOx content, and improve boiler energy efficiency Effect

Inactive Publication Date: 2011-12-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of low fuel utilization efficiency caused by high dust concentration and high carbon content in fly ash in the exhaust of existing coal-fired industrial boilers, as well as wear and tear of heat exchange equipment such as convection tube bundles and economizers at the tail of the boiler, and further provides a An ultra-low temperature smoke exhaust energy-saving boiler

Method used

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  • An ultra-low temperature exhaust gas energy-saving boiler
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  • An ultra-low temperature exhaust gas energy-saving boiler

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specific Embodiment approach 1

[0015] Specific implementation mode one: as Figure 1~2 As shown, an ultra-low temperature smoke exhaust energy-saving boiler in this embodiment includes a coal hopper 1, a fire grate 2, an air supply bin 3, a furnace body 4, a rear arch 5, a convection tube bundle 8, an economizer 9, and an air preheater 10 and vertical flue 11, the coal scuttle 1 is arranged on the front wall of the furnace body 4, the lower end of the coal scuttle 1 communicates with the furnace body 4, the rear arch 5 is arranged on the rear wall of the furnace body 4, the Fire grate 2 is located in furnace body 4, and described fire grate 2 is positioned at the below of coal hopper 1 and rear arch 5, and the bottom of described fire grate 2 is provided with a plurality of air-supply bins 3, and described a plurality of air-supply bins 3 all It communicates with the air preheater 10, the convection tube bundle 8, the economizer 9 and the air preheater 10 are sequentially arranged in the vertical flue 11 fr...

specific Embodiment approach 2

[0016] Specific implementation mode two: as figure 1 As shown, the cyclone dust collector 7 in this embodiment is composed of a dust collector main body 12, an inlet pipe 13 and an outlet pipe 14. The inlet pipe 13 is arranged on the side wall of the dust collector main body 12. The upper end of the main body 12 is connected, the outlet pipe 14 is vertically inserted on the upper surface of the dust collector main body 12, the lower end of the outlet pipe 14 is lower than the inlet pipe 13, and the bottom end surface of the dust collector main body 12 is an inclined plane. Such a design makes the flue gas at the outlet of the boiler furnace enter from the inlet pipe 13 of the cyclone dust collector and flows around the outlet pipe 14, thereby generating a complex vortex field in the cyclone dust collector 7 and realizing gas-solid separation in the cyclone dust collector At the same time, it also causes a strong gas-solid interaction, which is conducive to the full and efficie...

specific Embodiment approach 3

[0017] Specific implementation mode three: as figure 2 As shown, the cyclone dust collector 7 in this embodiment is composed of a dust collector main body 12, an inlet pipe 13, an outlet pipe 14 and a spin column 15. The inlet pipe 13 is arranged on the side wall of the dust collector main body 12. The swivel column 15 is vertically inserted on the upper end surface of the dust collector main body 12, the outlet pipe 14 is located in the dust collector main body 12, the outlet pipe 14 communicates with the lower end of the dust collector main body 12, and the lower end of the outlet pipe 14 is fixed On the bottom end surface of the dust collector main body 12, the bottom end surface of the dust collector main body 12 is a slope. Such a design makes the flue gas at the outlet of the boiler furnace enter from the inlet pipe 13 of the cyclone dust collector, and flows around the swivel column 15, thereby generating a complex vortex field in the cyclone dust collector 7, and real...

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Abstract

An ultra-low temperature smoke-exhausting energy-saving boiler relates to an energy-saving boiler capable of reducing pollution discharge. The invention aims to solve the problems of low fuel utilization efficiency caused by high dust concentration and high carbon content of fly ash in exhaust gas of existing coal-fired industrial boilers, and wear and tear of heat exchange equipment such as convection tube bundles and economizers at the tail of the boiler. The upper end of the furnace body communicates with the upper end of the vertical flue through the cyclone dust collector, the bottom end of the cyclone dust collector communicates with the furnace body, and a desulfurizer spout is opened on the upper end surface of the furnace body. The invention realizes the recycling of the desulfurizer in the effective area of ​​high-temperature sulfur fixation, greatly reduces the SO3 content in the flue gas while improving the SO2 removal efficiency, and improves the energy efficiency of the boiler by more than 10%; the unburned carbon particles are sent back for reburning The carbon content of the fly ash can be reduced to less than 2%, and at the same time, it can improve energy efficiency and reduce equipment wear. The energy-saving boiler of the invention can be used not only for newly-built boilers, but also for technical transformation of existing boilers.

Description

technical field [0001] The invention relates to an ultra-low temperature smoke exhaust boiler. Background technique [0002] Coal-fired boilers are important energy conversion devices. According to statistics, there are more than 500,000 coal-fired industrial boilers in my country, and the number continues to grow at a rate of 8,000 per year. Boiler energy efficiency is an important index to measure boiler performance, and it is also a basic parameter reflecting the effective utilization of fuel. Improving boiler energy efficiency is an important measure to achieve energy conservation and emission reduction. The research on improving energy efficiency of boilers, especially coal-fired boilers, has huge economic and social benefits. and environmental value. [0003] SO in flue gas of coal-fired boiler 3 It will react with water vapor to form sulfuric acid vapor and condense at a higher temperature, causing low-temperature corrosion of the heating surface of the boiler tail....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/02
Inventor 高继慧游尔胜孙飞高建民赵广播吴少华
Owner HARBIN INST OF TECH
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