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| What kind of pump is selected for lime gypsum desulfurization pump
In the power plant chemical industry, the desulfurization and denitration system is favored. Gypsum desulfurization is a common kind of wet desulfurization. Scope of application: it is suitable for large enterprises to carry out flue gas desulfurization. The lime lime gypsum method is applicable to a wide range of coals, with high desulfurization efficiency, high absorbent utilization rate (can be greater than 90%), high equipment operation rate (up to 90%), high working reliability (currently mature flue gas desulfurization process), and rich sources of desulfurizer limestone,
Advantages, disadvantages, technological process of lime gypsum method and what type of slurry pump is used?
The corrosion-resistant and wear-resistant slurry pump produced by Wanjin and the corrosion-resistant and particle resistant plywood pump are made of external cast steel lined with corrosion-resistant and wear-resistant materials, which have a good anti-corrosion effect on the corrosion of chloride ions in the medium. At the same time, the wear resistance is completely suitable for the transmission of lime slurry. Let's take a look at the introduction of desulfurization and denitration;
Desulfurization principle: limestone or lime is used as desulfurization absorbent. Limestone is crushed and ground into powder and mixed with water to form absorption slurry. When lime is used as absorbent, lime powder is digested and added with water to make absorbent slurry. When the absorption liquid is atomized and sprayed into flue gas through nozzle, the absorption liquid is dispersed into small droplets and covers the entire section of the absorption tower. These droplets are absorbed by SO2 when they are in countercurrent contact with flue gas. In this way, SO2 is absorbed in the absorption area, and the oxidation and neutralization reaction of the absorbent is completed in the liquid storage area at the bottom of the absorption tower to form gypsum.
First, advantages: high desulfurization efficiency (desulfurization rate is up to 95%); Single machine can handle large amount of flue gas, which can be matched with large boilers; The technology is mature and the operation reliability is good (the operation rate of this desulfurization device in foreign thermal power plants can generally reach more than 98%); It has strong adaptability to the change of coal type (whether it is high sulfur coal with sulfur content greater than 3% or low sulfur coal with sulfur content less than 1%, the desulfurization process can adapt to it), especially high sulfur coal; Abundant absorbent resources and low price; Desulfurization by-products are convenient for comprehensive utilization; The technology is updated rapidly.
Let's look at the disadvantages: the initial investment cost is too high, the operation cost is high, the process flow is complex, the floor area is large, the one-time construction investment is relatively large, the system management operation is complex, the wear and corrosion phenomenon is serious, the by-product gypsum can be exported, and the industrial wastewater is difficult to treat.
What are the general devices?
The desulfurization process consists of absorbent preparation system, flue gas absorption and oxidation system, desulfurization by-products, desulfurization wastewater treatment system, flue gas system automation, gypsum treatment system, wastewater system, control electrical system and online monitoring system.
vacuum flash distillation of introduction |
What kind of pump is selected for lime gypsum desulfurization pump
