SU1758342A1 - Step-type ash washing out apparatus - Google Patents

Abstract

Step zolosmyvnoy machine. The essence of the invention: the device contains an ash pit with a chute, stepped shapers with an annular visor, a casing of local suction installed with a gap to the upper shaper. The ash enters the water funnel resulting from the free flow of flush water from the former. 1 il.

Description

The invention relates to a power system, in particular to systems of hydraulic ash removal of thermal power plants and boilers,

Zolosymivnye apparatus (ZSA), known for mixing ash TPP with flush water and feed the resulting pulp in the system GZU.

A disadvantage of the known CSA is the low reliability due to the overgrowth of the ash deposits.

The closest in technical essence to the present invention is an open-overflow washing device selected as a prototype.

The disadvantage of the prototype is low reliability due to overgrowing with aeolian deposits, if ash with its burning properties is washed away. The reasons for this are as follows:

The process of mixing ash with flush water is carried out in a mixing chamber, therefore contact with its walls of insufficiently wetted ash particles, which stick, cement and form deposits, is unavoidable. Flushing the walls with water does not reliably eliminate this cause;

The supply of ashes to the apparatus is always accompanied by dusting, while the dust particles, deposited on the wetted surfaces inside the apparatus, are cemented and also form deposits;

The formation of deposits in the ash oestrus causes the penetration of water from a slit annular nozzle over adjacent surfaces.

The aim of the invention is to improve the reliability of SAR by eliminating the causes of ash deposits.

The goal is achieved through the use of an ICA flushing device, the design of which makes it possible to increase the mixing efficiency, as well as by organizing the suction of dusty air from the apparatus and the device of the insulating gap between the flushing device and the chute.

The drawing shows the proposed device.

The stepwise CSA contains a chute 1 with a local suction 4, formers with an annular visor 2, a drain pipe 3, a pipeline 5 for flush water and valves 6. Formers form a flushing device, and between the upper driver

(L

with

Xi

(L CD Sl

4 S

and a casing of local suction arranged insulating gap.

CSA works as follows. Ash flows through the chute into the water funnel, which is formed as a result of the free flow of flush water from the former with an annular visor, in which the mixing process is carried out. To ensure reliable gold forming units, they are switched on in steps, and their number is determined by the required power of the apparatus. Dusty air is suctioned from the ASA to an external suction device (not shown in the drawing) through a local suction made in the form of a casing enclosing a chute, and the suction air is compensated through an insulating gap between the local suction casing and the upper driver. In this case, the insulating gap prevents water from entering the flushing device into the chute and local suction.

Claims (1)

The use of a flushing device in the ICA, made in the form of stepwise shapers, allows the ash to be mixed with flush water in water funnels formed by the free discharge of water from the shapers' shields, i.e. in free space. This provides the desired degree of wetting of the ash particles before contacting them with the walls of the drain pipe. This prevents their sticking and the formation of ash deposits, which significantly increases the reliability of the apparatus. The suction of dusty air from ZSA prevents the formation of deposits due to the deposition of ash particles from the dusty air to the wetted surfaces inside the apparatus, and deposits in the drainage are prevented by the device of an insulating gap that prevents water from entering the drainage unit into the drainage, which also increases the reliability of the apparatus . Claims A step-up zolosmyvnaya machine containing ash chambers with estrus, flush device and drain pipe, characterized in that, in order to increase reliability by eliminating the formation of ash deposits, it is equipped with a local suction cover covering the chute, flush device made D form stepwise located shapers with an annular visor, and the casing of the local air suction is installed with a gap to the upper shaper. suction dusty air flush iBOfa pulp in the channel GZU