1. Design concept and characteristics of process equipment
1.1 features of ceramic filter element for medium and high temperature dedusting technology:
1. High temperature resistance (800 ℃)
2. Corrosion resistance
3. High purification (99.9% PM 2.5)
4. Long service life (3-5 years)
5. Catalytic
6. Stable operation differential pressure
7. Safety of sparks and high temperature substances
Structure of ceramic filter element for dust removal:
Multi layer filter - remove fine dust
Three dimensional structure - maintaining low differential pressure and three dimensional structure
(99.9% PM 2.5)
Structure of ceramic filter element
Pore size: 0.5-15 μ M
Porosity: 50-60%
Strength test results of ceramic filter element
technical data
The following is the evaluation result obtained in a Chemical Experimental Research Institute
Strength curve
Crushing strength curve under various conditions
It is hereby certified that it has excellent performance in absorption H2O, frost crack test, aging test, high temperature test, acid resistance test and alkali resistance test. There is no significant difference between the crushing strength of ceramics under various environmental conditions and the strength under no conditions.
Performance parameters of medium and high temperature ceramic dust remover
*The filtration efficiency and separation efficiency are as high as 2.5 μ M. the purification efficiency of smoke and dust can reach more than 99.9%, and the concentration of smoke and dust in the purified gas can reach less than 10mg / Nm3
*The operating temperature and pressure are generally over 400 ℃, the maximum operating temperature is over 800 ℃, and the operating pressure is up to 3Mpa.
*Filtration rate: 2-8cm / s.
*It has strong chemical corrosion resistance (SO2, H2S, H2O, alkali metal, salt, etc.) and oxidation resistance.
*Stable operation, good cleaning and regeneration performance, online cleaning and regeneration.
*Reduce cooling system and prevent low dew point substances.
*Improve gas purification efficiency and heat utilization efficiency.
Application prospect and market analysis of medium and high temperature ceramic dust remover in gas-solid separation
Based on the performance of ceramic dust remover, a variety of filtering devices can be developed, and the main application aspects are summarized as follows:
(1) Dedusting device of ceramic filter in coal-fired power plant.
(2) Ceramic membrane filter dust collector in metallurgical industry.
(3) Industrial gas purification.
(4) Recycle useful powder, especially high value-added dust.
(5) Medium and high temperature ceramic dust removal device matched with the existing flue gas denitration device.
To sum up, the medium and high temperature ceramic dust removal technology is a new and high technology across the century at home and abroad. Compared with other filters, the ceramic filter has obvious advantages in gas-solid separation, remarkable effect, technically desirable and economically feasible.
1.2 dry desulfurization technology (taking Na2CO3 as an example)
Compared with the wet process, the dry desulfurization process is characterized by less investment, small floor area, low operation cost, simple equipment and convenient maintenance. The advanced dry jet mixing technology, with ceramic filter as reaction bed, solves the disadvantages of slow reaction speed and low desulfurization efficiency of the traditional dry desulfurization process. According to the different dry desulfurizer used, the desulfurizing efficiency can reach 70% - 90%. Taking Na2CO3 as desulfurizer, the chemical reaction formula is as follows:
Na2CO3 + SO2 = Na2SO3 + CO2 (1)
2Na2SO3 + O2 = 2Na2SO4 (2)
Desulfurization efficiency curve
1.3 medium temperature SCR denitration technology
Dongshi company has successfully developed the medium temperature SCR composite ceramic denitration technology, realizing the integration of dust removal and denitration.
Technical features: 1. Meet the use conditions of medium and low temperature denitration catalyst (working temperature is 200 ℃ - 400 ℃).
2. Denitration efficiency is 70% - 95%.
3. According to the different requirements of flue gas temperature, NOx content and outlet index, primary or multi-level denitration can be adopted.
Main technical features of dsyy:
1. Dsyy dedusting, desulfurization and denitrification technology is truly integrated.
2. High efficiency of desulfurization and denitration.
3. Low operation cost.
4. Low emission turbidity.
5. Dsyy integrated device can be set in front of the HRSG, greatly reducing the ash accumulation and corrosion of the HRSG, and extending its service life.
6. Dsyy integrated device operates automatically, saving human resources.
7. Stable and reliable operation and easy maintenance.
2. Process flow diagram
3. Pictures of field devices
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