SU856509A1 - Wet ash trap - Google Patents

Description

(54) WET ZALOULITELB

one

The invention relates to devices for cleaning flue gases containing ash and oxides of sulfur, and can be used in the chemical, metallurgical and other industries.

A gas purification apparatus is known, having a housing, gas inlets and outlets, nozzles for irrigating the gas to be cleaned with water and walls of the apparatus, and an outlet for flushing the ash pulp 1.

The closest in technical essence and the achieved result is a wet ash collector, including a housing with a bottom and nozzles of flue gas inlet and outlet, irrigation nozzles 2.

During the movement of dusty gas through the apparatus, the ash particles are deposited on the drops of water sprayed by nozzles and on the walls of the apparatus irrigated. In this case, irrigation water absorbs (dissolves) a part of the sulfur oxides contained in the gas. As a result, the ash pulp flowing out of the apparatus can be acidic, which leads to intense corrosion of equipment intended for transporting the pulp.

The purpose of the invention is to increase the efficiency of the process by neutralizing the acid in the ash pulp.

To this end, the ash collector, comprising a housing with a bottom and irrigation nozzles, is provided with concentric annular vertical partitions attached to the bottom of the case, while even from the center, the partitions have openings located at the bottom, and their upper edges are located higher than the edges of 10 odd partitions.

The ash collector is provided with distributors for bubbling compressed air and a conical cap installed above the partitions.

The drawing shows a wet ash collector.

Claims (2)

It contains a gas inlet nozzle 1, a housing 2, a gas outlet nozzle 3, gas nozzles 4 and 5 for gas irrigation and body walls, a nozzle 6 for washing out the pulp, 20 ring partitions 7 sealed to the bottom of the case 8, even ring partitions 9 , the upper edges of which are located above the upper edges of the odd partitions, the through holes 10 in the even partitions, the air distributors 11 for mixing the pulp, and the cover 12 above the annular channels. The device works as follows. Flue gases containing ash and sulfur oxides flow through the inlet 1, where they are irrigated with water through nozzles 4 and 5 and then removed from the ash trap through the nozzle 3. As a result, the interaction of gases with irrigating water results in trapping solid particles of ash, as well as dissolving sulfur oxides in water. The pulp formed from the ash flows along the walls of the housing 2 and is collected in the outer annular channel. Through the openings 10 in the partitions, the pulp enters the next annular channel, through which it moves from the bottom up, then down again, and so on, until it reaches the nozzle 6 to drain the pulp. By choosing a certain height of the partitions, it is possible to ensure the required residence time of the pulp in the annular channels necessary for the interaction of the alkaline components of the ash with acid, which forms as a result of the dissolution of sulfur oxides in irrigating water. Compressed air supplied through the air distributors to the lower part of the annular channels provides pulp agitation necessary for better interaction of ash and acid, and also contributes to smoothing the diagram of pulp velocity through the channels to exclude transit flows of pulp. Thus, the invention makes it possible to increase the efficiency of the ash collecting process by neutralizing the acidic ash pulp in the ash collecting device itself by holding it under vigorous stirring for a predetermined time. 1. A wet ash collector comprising a housing with a bottom and flue gas inlet and outlet nozzles, irrigation nozzles, characterized in that, in order to increase the efficiency of the process by neutralizing the acid in the ash pulp, the ash collector is provided with concentric annular vertical partitions attached to the bottom housing, with the even from the center of the partition have holes located at the bottom, and their upper edges are located higher than the edges of the odd partitions. 2. A scum trap according to claim 1, characterized in that it is provided with distributors for compressed air bubbling. 3. Sealing agent for PP. 1 and 2, characterized in that it is provided with a conical cap installed above the partitions. Sources of information taken into account during the examination 1. USSR author's certificate number 336038, cl. B 01 D 47/10, 1969. 2. USSR author's certificate number 715117, cl. On 01 D 47/10, 1978 (prototype).