Low-temperature evaporation and concentration system for desulfurization wastewater

A technology for desulfurization wastewater and low-temperature evaporation, which is applied in the field of low-temperature flash evaporation and concentration systems, can solve the problems of high operation cost and insufficient operation safety and stability of the filtration reduction method, and achieves new load adaptability, low operation cost, and low intensity. Effect

Pending Publication Date: 2018-02-13
UNI RISING BEIJING TECH CO LTD
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Problems solved by technology

However, the operating cost of the membrane technology filtration reduction met

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  • Low-temperature evaporation and concentration system for desulfurization wastewater

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Embodiment 1

[0037] like figure 1 As shown, for thermal power plants. The desulfurization wastewater low-temperature evaporation concentration system includes a wastewater heating system, a wastewater flash treatment system, and a flash vapor suction compression system.

[0038] The wastewater flash treatment system of its core treatment device includes a flash tank and a flash circulation system; the upper part of the flash tank is a spray flash mechanism, the bottom is equipped with a water tank, the side is a steam outlet, and a droplet separation device is installed. Wastewater is sprayed into the flash tank in the form of mist or droplets, and is evaporated and cooled during the air time, and the part that has not been flashed falls into the bottom tank. Then it is filtered, and enters the waste water heating system to raise the temperature, and then re-pumps to the upper part of the flash tank through the waste water circulation pump to form the spray flash evaporation mechanism. T...

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Abstract

A low-temperature evaporation and concentration system for desulfurization wastewater, including a wastewater heating system, a wastewater flash treatment system, and a flash steam suction compression system; after the desulfurization wastewater flows through the wastewater heating system and is heated, it enters the wastewater flash treatment system for spray flash evaporation The mechanism performs flash evaporation; the flash steam pipeline of the wastewater flash treatment system is connected to the flash steam suction compression system; after the flash steam is compressed and heated by the flash steam suction compression system, it is connected to the waste water heating system as a heat source Wastewater heating system; the desulfurization wastewater circulation pipeline of the wastewater flash treatment system is connected to the flue through the concentrated water output pipe and sprayed into the evaporation system; the desulfurization wastewater is heated and low-temperature flash reduction, the concentrated wastewater is sprayed into the flue to evaporate, and the wastewater The water vapor is discharged into the atmosphere along with the flue gas, and the salt substances in the wastewater are captured by the dust collector, which realizes the zero discharge of the desulfurization wastewater, improves the safety of the electrostatic precipitator operation, and recovers the salt-free water from the flash evaporation.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to a low-temperature flash evaporation concentration system for desulfurization (or salt-containing) waste water. Background technique [0002] In order to meet the national requirements for ultra-low SO2 emissions, domestic power plants or other coal-fired equipment mostly adopt limestone-gypsum wet flue gas desulfurization technology, which produces serious wastewater discharge while desulfurizing efficiently. In April 2015, the State Council issued the "Water Pollution Action Plan" to strengthen the prevention and control of various types of water pollution. Due to the complex composition of desulfurization wastewater (including suspended solids, fluoride, heavy metals and salt, etc.) highly anticipated. [0003] At present, most of the desulfurization wastewater treatment adopts the process of chemical precipitation (traditional three-box method) to remove desulfurization wastewate...

Claims

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Application Information

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IPC IPC(8): C02F1/02C02F1/06C02F1/04C02F103/18
CPCC02F1/02C02F1/04C02F1/06C02F2103/18
Inventor 曲恒
Owner UNI RISING BEIJING TECH CO LTD
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