Unlock instant, AI-driven research and patent intelligence for your innovation.

Adjustable process for producing SO3 gas by treating high-concentration SO2 flue gas through applying inert catalyst

A high-concentration, adjustable technology, applied in inorganic chemistry, non-metallic elements, sulfur compounds, etc., can solve the problems of large fluctuations in gas volume, high investment, and ineffective use of energy, and achieve improved waste heat utilization, high production intensity, Investment saving effect

Active Publication Date: 2017-08-08
双盾环境科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of can high concentration SO 2 Gas conversion to high concentration SO 3 Gas and high production intensity, clean and energy-saving adjustable application of inert catalysts to treat high-concentration SO 2 Flue gas production SO 3 Gas process, the process is able to deal with SO 2 Flue gas whose concentration (volume ratio) fluctuates in the range of 13% to 32%, and can handle flue gas whose gas volume fluctuates in the range of 40% to 100%; to solve the problem of SO in flue gas 2 High concentration, large gas volume fluctuations, and the need to use a large amount of air dilution to apply traditional conversion technology involves high investment and inefficient use of energy, etc.

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
  • Adjustable process for producing SO3 gas by treating high-concentration SO2 flue gas through applying inert catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Environmental protection desulfurization recovery of SO in a power plant 2 The gas is used to produce sulfuric acid, and the gas composition of the flue gas after drying is: SO 2 —30.69%, O 2 —18.47%, N 2 —49.36%, CO 2 —1.48%, the total gas volume is about 90000Nm 3 / hr. flue gas through SO 2 After the blower 1 is boosted, it is heated to 390°C by the heat exchanger 2 and then enters the first inert catalyst conversion layer 31, the conversion rate is about 35%, and the outlet gas temperature is 660°C and contains SO 2 The concentration is 21.43%; after heat exchange by the first waste heat utilization device 41 (production of medium pressure 2.5MPa saturated steam 17.7t / hr), the temperature is lowered to 390°C and then enters the second inert catalyst conversion layer 32, and the total conversion rate of the reaction is about 60%. The outlet temperature is 580°C and contains SO 2 The concentration is 13.75%; after heat exchange by the second waste heat utilizat...

Embodiment 2

[0034] A sulfur acid plant adopts oxygen-enriched combustion to generate SO 2 The gas is used to produce sulfuric acid, and its gas composition after combustion is: SO 2 —20.78%, O 2 —17.39%, N 2 —61.83%, the total gas volume is about 115930Nm 3 / hr. flue gas through SO 2 After the blower 1 is boosted, it is heated to 390°C by the heat exchanger 2 and then enters the first inert catalyst conversion layer 31, the conversion rate is about 35%, and the outlet gas temperature is 587°C and contains SO 2 The concentration is 14.28%; after heat exchange by the first waste heat utilization device 41 (production of medium pressure 2.5MPa saturated steam 15.56t / hr), the temperature is lowered to 420°C and then enters the second inert catalyst conversion layer 32. The total conversion rate of the reaction is about 65%. The outlet temperature is 585°C and contains SO 2 The concentration is 7.95%; after heat exchange by the second waste heat utilization device 42 (production of medi...

Embodiment 3

[0036] SO 2 The gas is used to produce sulfuric acid, and its gas composition after combustion is: SO 2 —15.26%, O 2 —13.04%, N 2 —69.64%, CO 2 —2.06%, the total gas volume is about 154800Nm 3 / hr. flue gas through SO 2 After the blower 1 is boosted, it is heated to 390°C by the heat exchanger 2 and then enters the first inert catalyst conversion layer 31, the conversion rate is about 47%, and the outlet temperature is 590°C and contains SO 2 The concentration is 8.55%; after the heat exchange of the first waste heat utilization device 41 (production of medium pressure 2.5MPa saturated steam 17.46t / hr), the temperature is lowered to 390°C, and then enters the first layer reaction of the traditional active catalyst layer 5, and the total conversion rate of the reaction is About 85%, the outlet temperature is 550°C and contains SO 2 The concentration is 2.5%, the exhaust gas is cooled to 420°C by the corresponding heat exchanger, and then enters the second layer of the tr...

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 an adjustable process for producing SO3 gas by treating high-concentration SO2 flue gas through applying inert catalyst. The process comprises the following steps: a, primarily heating flue gas containing SO2 with concentration of 13 to 32%; b, feeding the flue gas into an inert catalyst conversion layer to enable a portion of SO2 gas to generate SO3 gas, and exhausting the flue gas after the flue gas reaches a set temperature; c, measuring the concentration of SO2 in the exhausted high-temperature flue gas and carrying out heat exchange treatment; d, repeatedly carrying out the steps (b) and (c) when the concentration of SO2 in the high-temperature flue gas measured in the step (c) is higher than 11 percent; feeding low-temperature flue gas subjected heat exchange into a traditional active catalyst layer to produce high-concentration SO3 gas when the concentration of SO2 in the high-temperature flue gas measured in the step (c) is between 7 percent and 11 percent. According to the process disclosed by the invention, by combining the inert catalyst conversion layer and a traditional active catalyst layer, the SO2 gas with the concentration of 13 to 32 percent can be processed; moreover, the production strength is high, and the process is sanitary and energy-saving.

Description

technical field [0001] The invention relates to a process for producing sulfuric acid by contact method, in particular to a process capable of converting high-concentration SO 2 Gas conversion to high concentration SO 3 Gas and high production intensity, clean and energy-saving adjustable application of inert catalysts to treat high-concentration SO 2 Flue gas production SO 3 Gas craft. Background technique [0002] Flue gas to sulfuric acid industry, the flue gas used mainly comes from SO recovered by pyrite, sulfur, non-ferrous metal smelting and metallurgy, coal burning, petrochemical and other industries 2 Gas, especially the rapid development of oxygen-enriched air combustion and oxygen-enriched air smelting and the development of recycling environmental protection technology, flue gas SO 2 The concentration may reach 13% to 93%. The traditional flue gas two-conversion and two-absorption, whether it is 3+1 or 3+2 process, or 1+3+1 or 4+1 can only deal with SO 2 Whe...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/79C01B17/78
CPCY02P20/129C01B17/79C01B17/78
Inventor 宋小良徐光泽
Owner 双盾环境科技有限公司