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Boiler flue gas desulfurization wastewater treatment system and treatment method thereof

A technology for boiler flue gas and desulfurization wastewater, which is applied in the fields of gaseous effluent wastewater treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. It can solve problems such as limited processing capacity and inapplicability to thermal power plant boiler flue gas treatment , to achieve the effect of simple system process

Pending Publication Date: 2020-07-31
BEIJING YANSHAN YULONG PEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system has limited processing capacity and is not suitable for the treatment of flue gas from thermal power plant boilers

Method used

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  • Boiler flue gas desulfurization wastewater treatment system and treatment method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a boiler flue gas desulfurization wastewater treatment system includes a wastewater regulating tank 16, a dehydrator 17, a boiler flue gas desulfurization tower 18 and a flue heat exchanger 19, and the boiler flue gas desulfurization wastewater treatment system also includes One-effect separator 20, one-effect circulation pump 21, one-effect heater 22; two-effect separator 23, second-effect circulation pump 24, second-effect heater 25; three-effect separator 26, three-effect circulation pump 27 and three-effect Heater 28. The first-effect separator 20 , the second-effect separator 23 and the third-effect separator 26 are all gas-liquid separators.

[0038]The wastewater regulating tank 16 is sequentially connected to the wastewater feed pump 29 and the first-effect separator 20 through the first pipeline 1 . The first-effect separator 20 is connected to the first-effect circulation pump 21 and the first-effect heater 22 sequentially through ...

Embodiment 2

[0044] Such as figure 1 As shown, a boiler flue gas desulfurization wastewater treatment method, comprising step A, the boiler flue gas is denitrified and desulfurized through the boiler flue gas desulfurization tower 18;

[0045] Step B, the boiler flue gas is removed from the desulfurization tower 18, and the gypsum slurry discharged from the desulfurization tower 18 is sent to the belt dehydrator through the slurry discharge pump. The desulfurization waste water after the belt dehydrator removes the gypsum is sent to the waste water regulating tank 16 through the pipeline; the waste water in the waste water regulating tank 16 is sent to the primary effect separator 20 by the waste water feed pump 29 for vapor-liquid separation;

[0046] Step C, part of the liquid phase separated by the first-effect separator 20 is sent to the first-effect heater 22 through the first-effect circulating pump 21 for secondary evaporation, and then enters the first-effect separator 20 again for...

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Abstract

The invention relates to a boiler flue gas desulfurization wastewater treatment system and a treatment method thereof. The treatment system comprises a wastewater regulating tank, a dehydrator, a boiler flue gas desulfurization column, a flue heat exchanger, a first-effect separator, a first-effect circulating pump, a first-effect heater, a second-effect separator, a second-effect circulating pump, a second-effect heater, a third-effect separator, a third-effect circulating pump and a third-effect heater. Salt and solid components in the wastewater are removed through triple-effect evaporation, concentration, drying and crystallization to finish treatment of the desulfurization wastewater, so that a process without wastewater emission is realized. The process has the characteristics of water saving, energy saving and no emission of wastewater.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas desulfurization wastewater treatment environmental protection equipment, in particular to a boiler flue gas desulfurization wastewater treatment system and a treatment method thereof. Background technique [0002] In order to achieve ultra-clean emission (SO2: 30mg / m3, NOx: 50mg / m3, dust: 5mg / m3) for the boiler flue gas of the petrochemical self-provided thermal power plant, amine denitrification and limestone wet desulfurization are adopted. When the chloride ion concentration of the gypsum slurry in the flue gas desulfurization tower is higher than 20,000ppm, the desulfurization effect will be affected. Therefore, part of the desulfurization wastewater after the gypsum slurry in the desulfurization tower is pumped to the belt dehydrator to remove gypsum needs to be discharged. However, this desulfurization wastewater contains limestone, gypsum, calcium sulfite, magnesium sulfite and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F101/10C02F101/12C02F101/14C02F101/16C02F103/18
CPCC02F1/04C02F2101/10C02F2101/16C02F2101/12C02F2101/14C02F2101/163C02F2101/101C02F2103/18
Inventor 林敏杰薛润芝魏占省庞尔祥
Owner BEIJING YANSHAN YULONG PEC