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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 method is relatively high, and its operation safety and stability are insufficient

Method used

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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

The invention discloses a low-temperature evaporation and concentration system for desulfurization wastewater. The system comprises a wastewater heating system, a wastewater flash treatment system anda flash steam suction and compression system, wherein the desulfurization wastewater flows through the wastewater heating system to be heated and then enters a spray flash mechanism of the wastewaterflash treatment system to be flashed; a flash steam pipeline of the wastewater flash treatment system is connected with the flash steam suction and compression system; the flashed steam is compressedby the flash steam suction and compression system to raise the temperature, and serves as a heat source of the wastewater heating system to be connected to the wastewater heating system; a desulfurization wastewater circulating pipeline of the wastewater flash treatment system is connected with a flue spray evaporation system by virtue of a concentrated water output pipe. The desulfurization wastewater is heated and subjected to low-temperature flash reduction, the concentrated wastewater is sprayed into the flue to be evaporated, water vapor in the wastewater is discharged into atmosphere along with the flue gas, and saline materials in the wastewater are trapped by a dust remover, therefore, zero emission of the desulfurization wastewater is realized, the operating safety of an electricprecipitator is improved, and the flashed salt-free water is recycled.

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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