Spray evaporation treatment method of wet method flue gas desulfurization wastewater in thermal power station

A wet flue gas desulfurization and spray evaporation technology, applied in water/sewage treatment, water/sludge/sewage treatment, separation methods, etc., can solve the problem of reducing flue gas temperature, increasing flue gas humidity, flue and dust collector Corrosion and other problems, to achieve the effect of reducing specific resistance, improving efficiency, and overcoming large corrosiveness

Active Publication Date: 2010-09-29
WUHAN TIANHE TECH
View PDF4 Cites 62 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems faced by the spray evaporation treatment technology of wastewater droplets in low-temperature flue gas are: 1. How to realize the rapid evaporation of desulfurization wastewater after spraying has alway...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spray evaporation treatment method of wet method flue gas desulfurization wastewater in thermal power station
  • Spray evaporation treatment method of wet method flue gas desulfurization wastewater in thermal power station
  • Spray evaporation treatment method of wet method flue gas desulfurization wastewater in thermal power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] In the thermal power plant wet flue gas desulfurization wastewater spray evaporation treatment method, first, a desulfurization wastewater spray evaporation treatment system is installed on the tail flue of the boiler 4, as shown in the figure. Set the atomizing nozzle 1 in the area where the flue gas velocity in the tail flue of boiler 4 is 5-11m / s and the temperature is 413K-470K, and the temperature is higher than the flue gas dew point t 1d , the flue gas dew point is calculated based on the percentage of partial pressure of water vapor and sulfur trioxide in the flue gas, namely:

[0019] t 1d =186+201lgH 2 O+26lgSO 3 . Use the water pump 2 to extract the desulfurization wastewater 5 after the exhaust gas is treated by the absorption tower 9, and the air compressor 3 compresses the air; the desulfurization wastewater 5...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a spray evaporation treatment method of the wet method flue gas desulfurization wastewater in a thermal power station. In the method, an atomizing nozzle is arranged in the region with the temperature at 413-470 K and the flue gas speed of 5-11 m/s in a flue of the boiler tail part; desulfurization wastewater is pumped by utilizing a water pump, air is compressed by a compressor, and the pressure ratio of the compressed air to the desulfurization wastewater entering into the atomizing nozzle is 0.25-0.6; the speed of liquid droplets atomized by the atomizing nozzle is 50-80 m/s, and particle diameters of the liquid droplets are less than 50 mu m; and the liquid droplets are evaporated and then exhausted out of a chimney together with the flue gas. The invention can save chemical drugs utilized in the conventional wastewater treatment method; overcome the defects of many apparatuses, large investment, high running cost and heavy apparatus repair and maintenance load of a wastewater treatment system in the prior art, overcome the great corrosion influence of chlorine ions in water meta-acidity environment, reduce the specific resistance of ashes in a dust collector and improve the dust collector efficiency through increasing the flue gas humidity and properly lowering the flue gas temperature.

Description

technical field [0001] The invention relates to a treatment method for wet flue gas desulfurization wastewater in a thermal power plant, in particular to a spray evaporation treatment method for wet flue gas desulfurization wastewater in a thermal power plant. Background technique [0002] Generally, the treatment methods of wet flue gas desulfurization wastewater in thermal power plants are carried out by chemical methods such as neutralization, flocculation, and precipitation. However, due to the special properties of wet desulfurization wastewater from thermal power plants: it is weakly acidic, with a pH value lower than 5.7; the suspended matter is high, but the particles are fine, and the main components are dust and desulfurization products (CaSO4 and CaSO3); it contains soluble chloride and fluorine compounds, nitrates, etc.; and heavy metals such as mercury, lead, nickel, arsenic, and chromium. Wastewater treated with chemical methods such as neutralization, floccula...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/12B01D53/14
Inventor 冉景煜张志荣
Owner WUHAN TIANHE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap