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Adjustable apparatus for producing SO3 gas by using inertia catalyst to process high-density SO2 flue gas

A SO2, high-concentration technology, applied in the direction of climate sustainability, sustainable manufacturing/processing, inorganic chemistry, etc., can solve the problems of inefficient use of energy, high investment, etc., and achieve improved utilization of waste heat, high production intensity, and land occupation saving effect

Active Publication Date: 2017-07-04
双盾环境科技有限公司
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  • 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 device that is capable of handling SO containing 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 The concentration is high and a large amount of air dilution is required to apply traditional conversion technology, which involves high investment and inefficient use of energy, etc.

Method used

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  • Adjustable apparatus for producing SO3 gas by using inertia catalyst to process high-density SO2 flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 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

[0030] 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

[0032] 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 tra...

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Abstract

The invention discloses an adjustable apparatus for producing SO3 gas by using an inertia catalyst to process high-density SO2 flue gas. The adjustable apparatus comprises a SO2 blower fan (1), the SO2 blower fan (1) is connected with a heat exchanger (2) through a pipeline for primary heating on flue gas with SO2 concentration of 13-32%, the heat exchanger (2) is connected with an inertia catalyst conversion layer (3) for sending the flue gas into the inertia catalyst conversion layer (3) for a quasi-adiabatic and exothermic reaction, after flue gas reaches a set temperature, the flue gas is discharged from the inertia catalyst conversion layer (3) to a waste heat utilization device (4) for heat exchange, and the low-temperature flue gas after heat exchange and cooling is input to a traditional active catalyst layer (5) for producing the high-density SO3 gas. The SO2 gas with high concentration of 13-32% can be processed by the apparatus, investment can be saved by 20-50%, land occupation is saved by 30-50%, waste heat utilization rate is increased by 2-5 times, and production intensity is high, and clean production with energy conservation can be realized.

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 device. 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 Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74
CPCC01B17/74Y02P20/129Y02P20/10
Inventor 宋小良徐光泽
Owner 双盾环境科技有限公司