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Re-devulcanization method based on circulating fluidized bed boiler flue

A technology of circulating fluidized bed and boiler flue, which is applied in the field of boiler desulfurization to achieve uniform atomization, prevent scaling, broad application prospects and promotion space

Inactive Publication Date: 2012-05-23
碧水蓝天环保集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to further improve the utilization rate of the desulfurizer in the circulating fluidized bed boiler, to improve the desulfurization efficiency, and to overcome the shortcomings of the existing tail humidification technology, the problem to be solved by the present invention is to provide a regenerator based on the flue of the circulating fluidized bed boiler. Desulfurization method

Method used

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  • Re-devulcanization method based on circulating fluidized bed boiler flue
  • Re-devulcanization method based on circulating fluidized bed boiler flue
  • Re-devulcanization method based on circulating fluidized bed boiler flue

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Embodiment 1

[0023] Design a 75t / h circulating fluidized bed boiler in a power plant to implement the re-desulfurization method based on the circulating fluidized bed boiler flue of the present invention. The process equipment flow chart is as follows figure 1 Shown.

[0024] The specific design basis is as follows:

[0025] Sulfur content of burning coal≤1.5%

[0026] Coal consumption of boiler during normal production ≤11t / h

[0027] Boiler flue gas volume 125000m 3 / h

[0028] SO before desulfurization 2 Emission concentration 2112mg / Nm 3

[0029] The method of re-desulfurization based on the flue of circulating fluidized bed boiler is to install humidification on the vertical flue at the end of the boiler which is lined with anti-corrosion plate 11 between the existing circulating fluidized bed boiler furnace 3 and the electrostatic precipitator 7. Device 6, wherein: the humidification device is composed of a humidifier 10, an air guiding device 12 and a slag remover 13; the humidifier 10 is com...

Embodiment 2

[0040] Design a 130t / h circulating fluidized bed boiler in a power plant to implement the re-desulfurization method based on the circulating fluidized bed boiler flue of the present invention. The process equipment flow chart is as follows figure 1 Shown.

[0041] The specific design basis is as follows:

[0042] Sulfur content of burning coal≤1.5%

[0043] Coal consumption of boiler during normal production ≤20t / h

[0044] The boiler flue gas volume is 170,000m 3 / h

[0045] SO before desulfurization 2 Emission concentration 2824mg / Nm 3

[0046] The method of re-desulfurization based on the flue of a circulating fluidized bed boiler is to install an alkali increase in the vertical flue at the end of the boiler equipped with an anticorrosive plate 11 between the existing circulating fluidized bed boiler furnace 3 and the electrostatic precipitator 7 Device 6, wherein: the alkali increasing device is composed of a humidifier 10, an air guiding device 12 and a slag remover 13; the humidif...

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Abstract

The invention discloses a re-devulcanization method based on a circulating fluidized bed boiler flue, namely, a moistening or / and alkalic-thickening device is arranged on a boiler tail flue between a current circulating fluidized bed boiler hearth and an electricprecipitator, wherein: the moistening or / and alkalic-thickening device consists of a moistener, an air ducting device and a slag separator. The invention combines spraying calcium in the fluidized bed boiler for devulcanization, moistening for activation devulcanization at the boiler tail, thus fully intercepting desulfurater not participating the reaction in the boiler, continuing to absorb sulfur dioxide, enhancing utility rate of desulfurater and efficiency of devulcanization at utmost, and leading the efficiency of devulcanization to be over 95%. The method can reduce investment cost of enterprises, thus enterprises can operate economically while satisfying environment-friendly discharge requirement.

Description

Technical field [0001] The invention relates to a boiler desulfurization method, in particular to a re-desulfurization method based on a circulating fluidized bed boiler flue. Background technique [0002] At present, in the desulfurization technology of circulating fluidized bed boilers, furnace combustion desulfurization is often used. The method is to use coal mixed with desulfurization agent or furnace to spray calcium for desulfurization. However, furnace desulfurization is often affected by boiler combustion conditions. The influence of many factors causes the desulfurizer to not fully participate in the reaction, which directly affects the utilization rate and desulfurization efficiency of the desulfurizer. At the same time, it also causes serious waste of the desulfurizer and economic losses to the enterprise. [0003] In order to improve the desulfurization efficiency of the circulating fluidized bed boiler and reduce the use of desulfurizers, both domestic and foreign cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 朱学智蒋和团
Owner 碧水蓝天环保集团有限公司