Packing type urea catalytic hydrolysis device

Abstract

The filler type urea catalytic hydrolysis device is simple in structure, the catalytic effect of urea hydrolysis is effectively improved, the hydrolysis reaction rate is increased, meanwhile, the problems of deposition and blockage of insoluble solid substances in the high-pressure hydrolysis process of a high-concentration urea kettle body are solved, and the heat exchange efficiency is improved. A packing type urea catalytic hydrolysis device comprises a hydrolysis reaction kettle, a gas outlet is formed in the top of the hydrolysis reaction kettle, the interior of the hydrolysis reaction kettle is divided into a heat exchange area and a packing area through a partition plate arranged at the bottom of the hydrolysis reaction kettle, and an overflow weir opening is formed in the top end of the partition plate; a heat exchanger is arranged in the heat exchange area, and a urea solution inlet is formed in the bottom of the heat exchange area; a gas distributor, a supporting grid and a liquid distributor are sequentially arranged in the filler area from the bottom to the top end of the partition plate, the supporting grid, the liquid distributor, the partition plate and the side wall of the hydrolysis reaction kettle jointly form a filler layer in a surrounding mode, the filler layer is used for containing filler, and a gas inlet and a circulating liquid outlet are formed in the bottom of the filler area.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification in thermal power plants, in particular to a packing type urea catalytic hydrolysis device. Background technique [0002] In the selective catalytic reduction technology of flue gas denitrification technology in thermal power plants, the preparation of the reducing agent ammonia usually uses three sources: liquid ammonia, ammonia water and urea. In recent years, due to the emphasis on safety factors and potential dangers, the market demand for urea hydrolysis ammonia production technology has increased. Among them, urea hydrolysis technology has been maturely applied to the waste liquid recovery process of urea synthesis in the chemical industry. The main principle is to use a certain concentration of urea aqueous solution to undergo a hydrolysis reaction under a certain pressure and temperature, and finally produce ammonia gas. Urea hydrolysis technology is applied in the field o...

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Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a packing type urea catalytic hydrolysis device, which has a simple structure, effectively improves the catalytic effect of urea hydrolysis, improves the hydrolysis reaction rate, and simultaneously solves the problem of high-pressure hydrolysis of high-concentration urea kettle body. The problem of deposition and clogging of insoluble solid substances in the process improves heat exchange efficiency

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