Dry Desulphurization Technology and Equipment
Dry Desulphurization Technology and Equipment
Traditional dry flue gas desulfurization processes mainly include dry calcium injection, electron beam irradiation, and adsorption methods, but their desulfurization efficiency is relatively low. Our company adopts a new sodium-based desulfurization process, which effectively improves efficiency. This method is particularly suitable for treating flue gas with low SO2 content, where technical renovation space is limited and investment is minimal, such as in small and medium-sized lime kilns.
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Performance features
The technology and equipment for treating sulfur compounds in industrial kiln flue gas can generally be divided into three categories: pre-combustion desulfurization, incombustion desulfurization and post-combustion desulfurization. Among them, post-combustion desulfurization (FGD) is divided into wet method, dry method and semi-dry method according to the dry and wet states of absorbent and desulfurization products in the desulfurization process.
Overview
The semi-dry flue gas desulfurization technology is based on the principle of circulating fluidized bed. It establishes a high-density, intensely turbulent particle bed layer at the upper part of the Venturi tube in the desulfurization tower. By injecting water to cool down, it reduces the flue gas temperature by 15℃ to 20℃ above the dew point. Absorbent is then injected into the tower, utilizing the relative sliding speed between the flue gas and the absorbent particles to achieve desulfurization. The repeated recirculation of the absorbent extends the contact time between the absorbent and the flue gas, significantly improving the utilization rate of the absorbent. This technology has been widely applied in flue gas purification projects for coal-fired power plants, industrial kilns, and steel sintering and pelletizing processes.
Our company has improved and optimized the absorption tower and other key parts, increased the bed density, and achieved ultra-low emission of desulfurization and dust removal. In the circulating fluidized bed absorption tower, Ca(OH)2 completes the chemical reaction with SO2 in the flue gas and almost all SO3, HCl, HF, etc., to achieve the purpose of desulfurization.
2. Performance advantages
(1) High density fluidized bed technology is adopted, and flue gas recirculation device is set up to achieve high desulfurization efficiency and high utilization rate of desulfurizer;
(2) It has good adaptability to the change of sulfur dioxide concentration in inlet flue gas;
(3) The high-pressure reflux atomization water nozzle is used to spray and cool the desulfurization tower directly, which responds quickly to the system load changes and ensures the reliable operation of the rear dust collector;
(4) The whole process is dry reaction, no need for corrosion prevention, no waste water discharge, no need for white smoke removal;
(5) can remove harmful substances such as heavy metals and organic pollutants;
(6) The desulfurization by-product has good fluidity and is easy to deal with.
Dry desulphurization technology and equipment
1. Overview
Traditional dry flue gas desulfurization processes mainly include dry calcium injection, electron beam irradiation, and adsorption methods, but their desulfurization efficiency is relatively low. Our company adopts a new sodium-based desulfurization process, which effectively improves efficiency. This method is particularly suitable for treating flue gas with low SO2 content, where technical renovation space is limited and investment is minimal, such as in small and medium-sized lime kilns.
2. Performance features
(1) The whole system of dry desulfurization has no industrial water consumption and waste water production, and will not increase the moisture content of coke oven flue gas itself;
(2) No desulfurization tower, small footprint, no increase of system resistance, low power consumption, simple system, easy operation and maintenance, low cost;
(3) The desulfurization efficiency is higher than 95%, and the flexibility is high. The amount of desulfurizer can be automatically adjusted according to the content of acid substances in flue gas;
(4) The system does not need to do special anti-corrosion;
(5) No white smoke is produced;
(6) The amount of by-products is small, the purity of sodium sulfate is high, and it is convenient to use.
Overview
The semi-dry flue gas desulfurization technology is based on the principle of circulating fluidized bed. It establishes a high-density, intensely turbulent particle bed layer at the upper part of the Venturi tube in the desulfurization tower. By injecting water to cool down, it reduces the flue gas temperature by 15℃ to 20℃ above the dew point. Absorbent is then injected into the tower, utilizing the relative sliding speed between the flue gas and the absorbent particles to achieve desulfurization. The repeated recirculation of the absorbent extends the contact time between the absorbent and the flue gas, significantly improving the utilization rate of the absorbent. This technology has been widely applied in flue gas purification projects for coal-fired power plants, industrial kilns, and steel sintering and pelletizing processes.
Our company has improved and optimized the absorption tower and other key parts, increased the bed density, and achieved ultra-low emission of desulfurization and dust removal. In the circulating fluidized bed absorption tower, Ca(OH)2 completes the chemical reaction with SO2 in the flue gas and almost all SO3, HCl, HF, etc., to achieve the purpose of desulfurization.
2. Performance advantages
(1) High density fluidized bed technology is adopted, and flue gas recirculation device is set up to achieve high desulfurization efficiency and high utilization rate of desulfurizer;
(2) It has good adaptability to the change of sulfur dioxide concentration in inlet flue gas;
(3) The high-pressure reflux atomization water nozzle is used to spray and cool the desulfurization tower directly, which responds quickly to the system load changes and ensures the reliable operation of the rear dust collector;
(4) The whole process is dry reaction, no need for corrosion prevention, no waste water discharge, no need for white smoke removal;
(5) can remove harmful substances such as heavy metals and organic pollutants;
(6) The desulfurization by-product has good fluidity and is easy to deal with.
Dry desulphurization technology and equipment
1. Overview
Traditional dry flue gas desulfurization processes mainly include dry calcium injection, electron beam irradiation, and adsorption methods, but their desulfurization efficiency is relatively low. Our company adopts a new sodium-based desulfurization process, which effectively improves efficiency. This method is particularly suitable for treating flue gas with low SO2 content, where technical renovation space is limited and investment is minimal, such as in small and medium-sized lime kilns.
2. Performance features
(1) The whole system of dry desulfurization has no industrial water consumption and waste water production, and will not increase the moisture content of coke oven flue gas itself;
(2) No desulfurization tower, small footprint, no increase of system resistance, low power consumption, simple system, easy operation and maintenance, low cost;
(3) The desulfurization efficiency is higher than 95%, and the flexibility is high. The amount of desulfurizer can be automatically adjusted according to the content of acid substances in flue gas;
(4) The system does not need to do special anti-corrosion;
(5) No white smoke is produced;
(6) The amount of by-products is small, the purity of sodium sulfate is high, and it is convenient to use.
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