SU139976A1 - Multi-chamber continuous furnace for firing clinker in a fluidized bed - Google Patents

Description

BASIC Auth. St. No. 139594, a multi-chamber continuous kiln for burning clinker in a fluidized bed has been described. The present additional invention extends the range of application of the main invention by increasing the thermal efficiency. the furnace and the sequential transfer of the calcined material from one chamber to another.

Increased thermal efficiency The furnaces are carried out due to the fact that the gas outlets from each chamber through their cyclone cleaners are connected to the gas supply channels of the neighboring chambers in countercurrent to the direction of movement of the material baked in the furnace. The thermal regime of the chambers is stabilized by making the separating chambers of vertical partitions flat.

For the sequential transfer of the calcined material from one chamber to another, ejection devices are mounted under the stepped grates.

The drawing shows a diagram of the proposed furnace.

It is intended to produce cement clinker by burning pellets of cement raw meal having a diameter of from 2 to 10 mm in a pseudo-liquid state.

The furnace is divided into five or more chambers I, 2, 3, 4, and 5 by continuous vertical partitions 6, 7, 8, and 9. Each chamber has a horizontal grate 10, dividing the chamber into two parts, the nodule and the podolosnikuyu. The furnace is lined with high-refractory material (chrome-magnesite or magnesite. Vertical partitions are made from it.

№ 139976

The grates 10 are made of special magnesite mass on the spindle linkage.

The loading of the calcined material // in the form of granules is produced into the chamber /, from where it is successively transmitted to the chambers 2, 5, 4 and 5.

Since the gas flow passes in the opposite direction and therefore does not allow drying, transfer of material from the chamber to the chamber by gravity doesn’t occur, ejection devices are mounted under the grates 10. The latter work on compressed air and transfer material from the chamber with lower gas pressure to the chamber with greater gas pressure.

In each chamber, a certain stage of heat treatment of the granules in a pseudo-liquid film layer is carried out.

In the chamber / -dehydration of wet granules and heating them to 100-200 °.

In chamber 2, the pellets are heated to a temperature of 600-700 °.

In chamber 3, decarbonization of the granules and heating them to a temperature of 1000 °.

In chamber 4, firing to a temperature of 1400-1500 °. In chamber 5, the cooling of the clinker. Cold air 12 is supplied to chamber 5 from under the grate, which heats up from cooled clinker to 300-400 °.

From the head of the chamber / air enters the cyclone, where it is cleaned of dust and enters the grate of the chamber 2, where natural gas is also fed through a special burner. The gas is mixed with hot air and burns over the grill in the layer of pellets.

The exhaust gases from chamber 4 are passed through a cyclone under the grille of chamber J, where natural gas is also supplied.

Waste P1, gas from chamber 3 is fed in the same way to chamber 2 and from there to chamber 1.

The entire unit operates under the vacuum created by the smoke exhauster 13 installed behind the chamber / and for sucking off the exhaust gases from the unit and throwing them into the atmosphere.

All the dust generated in the chambers is separated from the gas flow in the cyclones installed on the gas pipelines between the chambers, and thereby preventing clogging and "blockage of the grate dust.

In this way, the principle of countercurrent of material and gas is carried out in the furnace, and the latter consistently transfers its heat to the material through the chambers, heating it.

The flue gas temperature from the first chamber is 100-150.

The proposed kiln can be used to bake non-caking materials.

Preferred 1 and d

Claims (2)

1. Multi-chamber continuous furnace for calcining clinker in a fluidized bed according to ed. St. L 139594, about t of l and h and h HJ, and with the fact that, for the purpose of increase in thermal kpd Furnaces, gas outlets from each chamber through their cyclone cleaners are connected to gas feed channels of adjacent chambers by countercurrent to the direction of movement of the material baked in the furnace, while to stabilize the thermal regime of each chamber, the vertical partitions separating them are made solid. 2. A furnace according to claim 1, characterized in that, in order to carry out the sequential transfer of the calcined material from one chamber to another, under the grates arranged stepwise, ejection devices are mounted. L l  g c 1 | - --i - Vjtl-- 3J- “I 4 3 i i5 Sj Иi5j 1 1. about y- r. - m -: --1- .f °; - shh-tk ,,.,. g, ,, o, and °, ° -. | .-, 44- - -v4- 4 - i- & i-. - -: -: n: -v "v; t; iWl l --4-rr; i ufady44ZH-: E: -; G Mi :; --TZ-KX in KoflodfUjiit Soycfj / x  air ; ..%. u:. ;;.; :; m- b4444