Vertical coal gas washing and dewatering integrated system

Abstract

The invention discloses a vertical coal gas desalting and dewatering integrated system which is mainly designed to achieve the purposes that the system can be conveniently arranged on an existing coal gas pipeline or a newly-built coal gas pipeline and occupies small space. The vertical coal gas washing and dewatering integrated system comprises a circulating water device, a vertical coal gas washing and dewatering device and a liquid collecting tank which are connected into a circulating loop in the liquid flowing direction. The vertical coal gas washing and dewatering integrated system occupies small space and thus can be conveniently additionally arranged on an existing or newly-built coal gas pipeline, a small amount of water is used for washing blast furnace gas containing harmful acid materials and salt in the whole system, coal gas containing mechanical water is subjected to high-speed rotational flow in the vertical coal gas washing and dewatering device, the coal gas at a high temperature and water mist are subjected to mass and heat transfer, the acid materials and salt in the coal gas are dissolved, mechanical water drops are removed under the action of centrifugal force, and thus a pipe network and equipment can be protected; meanwhile, the heat utilization rate of the coal gas is increased, and energy is saved.

Description

technical field [0001] The invention relates to a vertical gas washing and dehydration integrated system. Background technique [0002] Blast furnace gas is a by-product gas in the blast furnace smelting process of metallurgical enterprises, and occupies an important position in the energy structure of iron and steel enterprises. Before 2000, the blast furnace gas purification process was mainly based on wet methods. With the improvement of environmental protection requirements, the maturity of dry bag dust removal technology and the innovation of filter materials (bags), dry dust removal has become a trend and The most mainstream purification process. Compared with wet dust removal, dry dust removal residual pressure power generation increased by about 25% to 30% year-on-year. Pollution is relatively small and other advantages. On the other hand, blast furnace gas dry dedusting also brings obvious disadvantages. Since iron ore needs to be sprayed with seawater to suppres...

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Problems solved by technology

Although this method is effective, because the washing tower and its ancillary facilities have a large footprint (the diameter of the washing tower is 6~10m, which is different according to the furnace capacity), the investment is high and the water consumption is large (2~4 of the present invention compared with the same period of time). Times), high operating costs and other reasons are greatly restricted, especially in the system has been built and put into operation to increase the alkali spray scrubber is more difficult

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