Process for removing sulfur dioxide from flue gases by using seawater
A technology for sulfur dioxide and flue gas, which is applied to chemical instruments and methods, separation of dispersed particles, lighting and heating equipment, etc., can solve the problems of high construction and operation costs of packed absorption towers, short service life of ordinary polypropylene packings, height of packed towers and Large diameter and other problems, to achieve the effect of reducing the volume of the aeration tank, reducing the dilution ratio of fresh seawater, and reducing the aeration pressure
Active Publication Date: 2013-07-03
OCEAN UNIV OF CHINA +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The traditional seawater desulfurization technology usually uses ordinary polypropylene random packing, which leads to a large height and diameter of the packed tower, a large amount of packing, and a short service life of ordinary polypropylene packing
The construction and operation costs of the packed absorption tower are relatively high
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0025] As shown in the figure, after dust removal and heat exchange, the temperature is 110°C, SO 2 The content is 2500mg / m 3 The raw flue gas enters the desulfurization absorption tower with a diameter of 1.2m from the bottom, and is countercurrently absorbed by fresh seawater at a temperature of 30°C that enters the absorption tower from the cooling system of the generator set. The tower is filled with modified polypropylene structured packing with a height of 1.6m, and the amount of flue gas entering the tower is about 1.2×10 4 m 3 / h, sea water spray volume is 40.5m 3 / h (liquid-gas ratio is 3.4L / m 3 ) under the operating conditions, the desulfurization rate can reach 89.8%; maintain the amount of flue gas entering the tower and increase the amount of seawater spraying to 49.9m 3 / h (the liquid-gas ratio is 4.2L / m 3 ), the desulfurization rate can reach 99.0%. The amount of flue gas entering the tower is 1.0×10 4 m 3 / h, sea water spray volume is 19.8m 3 / h (liqui...
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
Login to View More Abstract
The invention discloses a process for removing sulfur dioxide from flue gases by using seawater, which is characterized by comprising the following steps: firstly, introducing sulfur-containing fuel gases which are subjected to dust removal as well as heat exchange by a gas-to-gas heat exchanger into an absorption tower from the bottom of the absorption tower to reversely contact seawater sprayedfrom the top part of the absorption tower through a filler carrying a catalyst so as to remove the sulfur dioxide in the fuel gases; secondly, contacting the seawater obtained after desulfurization with modified naturally alkaline controlled release agent to increase the pH value of the seawater; thirdly, accelerating the oxidation of sulfite ions to form sulfate ions through the treatment by an electrolytic and catalytic oxidization system; and finally, processing the seawater by an aeration tank and discharging the seawater which reaches standards into sea. The process can effectively improve desulfurization efficiency and reduce aeration needed for restoring the sweater, the mixing amount of fresh seawater, the area of the aeration tank, the load of an aeration fan, the construction cost of the filler absorption tower and the aeration tank and the operation cost of system restoration.
Description
technical field [0001] The invention relates to a flue gas desulfurization technology applicable to coastal coal-fired boilers, more specifically a technology for removing sulfur dioxide from coal-fired boiler flue gas by using seawater as an absorbent. Background technique [0002] According to the Atmospheric Environment Announcement of the State Environmental Protection Administration, in 2004, my country's sulfur dioxide emissions were 22.549 million tons; Year-on-year increased by 1.8% compared with 2005. Atmospheric SO 2 The capacity index is 474 tons, which actually exceeded 4.6 times by 2006. Taking thermal power as an example, the Eleventh Five-Year Period is an important period for construction and system reform, and it is also an important period for thermal power plants to control SO 2 critical moment. It is estimated that by 2010, the national thermal power installed capacity will reach about 500 million kilowatts, the coal consumption will be about 1.3 billi...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/78B01D53/50F23J15/04
Inventor 李春虎冯丽娟徐海波卞俊杰薛军杨东王小立陈玉乐张静伟于英明侯影飞赵文强
Owner OCEAN UNIV OF CHINA