Method and device for accelerating oxidation of calcium sulfite in desulfurized ash by utilizing low-temperature waste gas
A technology of calcium sulfite and desulfurization ash, which is applied in chemical instruments and methods, separation methods, calcium/strontium/barium sulfate, etc., can solve problems such as secondary environmental pollution, and achieve the effect of saving costs and solving secondary pollution.
Active Publication Date: 2021-07-20
KUNSHAN YUSHUN ENVIRONMENTAL PROTECTION TECH CO LTD
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[0004] The purpose of the present invention is to solve the problems and deficiencies in the prior art, provide a method and device for accelerating the oxidation of calcium sulfite in desulfurization ash by using low-temperature waste gas, and utilize the original low-temperature waste gas resources of the enterprise to realize the oxidation of calcium sulfite into sulfuric acid Calcium can not only effectively utilize the waste heat resources of low-temperature exhaust gas, but also provide the oxygen source required for oxidation reactions, and can produce calcium sulfate products with market value, and finally completely solve the problem of secondary pollution of the environment
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[0023] The following embodiments of the present invention are described in further detail.
[0024] A method for accelerating the oxidation of calcium sulfite in desulfurization ash by using low-temperature exhaust gas, which is to uniformly pass low-temperature exhaust gas generated by the factory into the calcium sulfite slurry in the absorption device, and use the waste heat of the low-temperature exhaust gas to heat the calcium sulfite slurry , so that the slurry temperature reaches the appropriate temperature range for the rapid oxidation of calcium sulfite, and at the same time use the oxygen source in the low-temperature exhaust gas to combine oxygen and calcium sulfite to form calcium sulfate under a certain temperature condition to achieve the removal of calcium sulfite The purpose of; this method comprises the following steps:
[0025] Step 1. Input the low-temperature exhaust gas from the low-temperature exhaust gas delivery pipeline 8 at the lower part of the absor...
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The invention provides a method for accelerating the oxidation of calcium sulfite in desulfurization ash by using low-temperature waste gas. The low-temperature waste gas produced in the factory is evenly passed into the calcium sulfite slurry in the absorption device, and the waste heat of the low-temperature waste gas is used to heat sulfurous acid. Calcium slurry, so that the temperature of the slurry reaches the appropriate temperature range for the rapid oxidation of calcium sulfite, and at the same time, the oxygen source in the low-temperature exhaust gas is used to combine oxygen with calcium sulfite to form calcium sulfate under certain temperature conditions to achieve desulfurization. Objective, the present invention also provides a device for accelerating the oxidation of calcium sulfite in desulfurization ash by using low-temperature exhaust gas. The invention utilizes the original low-temperature exhaust gas resources of the enterprise to realize the oxidation of calcium sulfite into calcium sulfate, which can not only effectively utilize the waste heat resources of low-temperature exhaust gas, but also provide the oxygen source required for the oxidation reaction, and can produce calcium sulfate products with market value , to solve the problem of secondary pollution of the environment.
Description
technical field [0001] The invention belongs to the technical field of exhaust gas desulfurization, and in particular relates to a method and a device for accelerating the oxidation of calcium sulfite in desulfurization ash by using low-temperature exhaust gas. Background technique [0002] Sulfur is a harmful element in fossil fuels that produces the harmful substance SO during combustion 2 , direct discharge into the atmosphere is easy to form "acid rain" and other bad weather, so the country requires desulfurization and purification treatment for combustion kilns. The current flue gas desulfurization technology is mainly divided into three major types: wet method, semi-dry method and dry method From the types of desulfurizers, it can be divided into several methods such as calcium-based, sodium-based, magnesium-based and ammonia methods. It has become the development trend of desulfurization technology to gradually transform wet desulfurization into semi-dry method or dry...
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IPC IPC(8): B01J19/26C01F11/46B01D53/80B01D53/50
CPCY02P20/129
Inventor 李泽宇李中楼
Owner KUNSHAN YUSHUN ENVIRONMENTAL PROTECTION TECH CO LTD