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Dust-removing flue gas treatment device and method

A flue gas treatment and flue gas technology is applied in the field of dust-removing flue gas treatment devices, which can solve the problems of high investment and operating costs, high technical costs, and high equipment investment costs, and achieve the effects of low operating costs and reduced use costs.

Active Publication Date: 2017-07-25
ZHONGJING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the wet electrostatic precipitator is placed behind the desulfurization tower, it will increase resistance. It uses closed-loop flushing water, which needs to continuously replenish raw water and discharge waste water, which increases the difficulty of water balance in the desulfurization system. The technology of a single wet electrostatic precipitator The cost is high, and the equipment investment cost is higher than that of ordinary electrostatic precipitators. In addition to the power consumption of the dust collector itself, the auxiliary circulating water pump will also consume part of the electricity during operation. The additives in the flushing water also increase part of the operating cost, so its investment and operation too expensive

Method used

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  • Dust-removing flue gas treatment device and method
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  • Dust-removing flue gas treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] figure 1 It is a schematic diagram of the device of Example 1 of the present invention. It can be seen from the figure that the flue gas treatment device of the present invention includes a desulfurization tower 1 , dust removal equipment, and a mist eliminator 6 . The upper part of the desulfurization tower 1 includes a spray absorption area, and the spray absorption area includes three layers of spray absorption layers 2, which are used to spray and absorb flue gas with slurry. The lower part of the desulfurization tower 1 is provided with a slurry circulation pool 7 for receiving the absorption slurry from the spray absorption area. The slurry circulation pool 7 is connected to the spray absorption layer 2 through the slurry circulation pump 3; the slurry circulation pump 3 pumps the absorption slurry in the slurry circulation pool 7 to the spray absorption layer 2, and continues to spray and absorb the flue gas.

[0076] The dust removal equipment of the present i...

Embodiment 2

[0092] The device, process and dedusting liquid of Example 1 were applied to the 1.5 million tons of pellet desulfurization, denitrification and dedusting project, only the amount of dedusting liquid in Example 1 was changed. The operating parameters and technical indicators of the project are shown in Tables 4 and 5.

[0093] Table 4 Operational parameters of 1.5 million tons of pellet desulfurization, denitrification and dust removal project

[0094] serial number parameter unit value 1 Flue gas volume (working condition) m 3 / h

780000 2 Inlet sulfur dioxide concentration mg / Nm 3

1600 3 Export sulfur dioxide concentration mg / Nm 3

60 4 Inlet nitrogen oxide concentration mg / Nm 3

650 5 Export nitrogen oxide concentration mg / Nm 3

65 6 Inlet dust mg / Nm 3

115 7 export dust mg / Nm 3

0.3 8 Flue gas temperature ℃ 110-160 9 Operating costs Yuan / ton of pellets 4.4 ...

Embodiment 3

[0099] The device and process of Example 1 were used in the 1.5 million tons of pellet desulfurization, denitrification and dust removal project, only the formula of the dust removal solution in Example 1 was changed (as shown in Table 6). The operating parameters and technical indicators of the project are shown in Tables 7 and 8.

[0100] Table 6 Dedusting liquid formula table

[0101]

[0102] Table 7 Operation parameters of 1.5 million tons of pellet desulfurization, denitrification and dust removal project

[0103] serial number parameter unit value 1 Flue gas volume (working condition) m 3 / h

780000 2 Inlet sulfur dioxide concentration mg / Nm 3

1600 3 Export sulfur dioxide concentration mg / Nm 3

60 4 Inlet nitrogen oxide concentration mg / Nm 3

650

[0104] 5 Export nitrogen oxide concentration mg / Nm 3

65 6 Inlet dust mg / Nm 3

115 7 export dust mg / Nm 3

21 ...

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Abstract

The invention discloses a dedusting flue gas treating apparatus and method. The dedusting flue gas treating apparatus comprises a flue gas treating body and a dedusting device. The dedusting device comprises a dedusting liquid storage unit, an atomizing nozzle, a dedusting liquid conveying unit and a dedusting liquid collecting unit, wherein the dedusting liquid storage unit is arranged out of or in the flue gas treating body and used for storing a dedusting liquid, the atomizing nozzle is arranged above a spraying and absorption area and used for carrying out atomization on the dedusting liquid, the dedusting liquid conveying unit is used for conveying the dedusting liquid in the dedusting liquid storage unit to the atomizing nozzle, and the dedusting liquid collecting unit is arranged in an area located between the spraying and absorption area and the atomizing nozzle and used for collecting the dedusting liquid after atomization and dedusting. The flue gas treating apparatus and method provided by the invention use the dedusting liquid for flue gas dedusting, are free of investment on expensive equipment and have low operation cost; and dust content of dedusted flue gas is lower than 30 mg / Nm3.

Description

technical field [0001] The invention relates to a flue gas treatment device and method, in particular to a flue gas treatment device and method capable of removing dust. Background technique [0002] From January 1, 2013, Beijing officially began to monitor PM2.5. On January 2, 2014, the Beijing Municipal Environmental Protection Bureau announced the city's air quality in 2013. In 2013, the number of days with good air quality in Beijing was only 176 days, accounting for 48.2 %. Similar situations exist not only in Beijing, but also in Shanghai, Tianjin, Hebei and other provinces and cities. Among them, "smog" is one of the main forms of air pollutants in these areas. People have paid more and more attention to the "smog" problem. [0003] China is a large coal-based energy consumer, but also a major steel producer. At the end of 2006, my country's coal-fired power generation installed capacity reached 484 million kilowatts, 1.2 billion tons of coal was burned, and the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/60B01D53/64B01D47/06
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD