TH7263A - Processes and tools for thermally treating fine granular solids Especially for calcining the crushed raw materials for cement production. - Google Patents

Abstract

Processes and machines are available to thermally treat granular solids. Especially for calcining the crushed raw materials for cement production. In the process of acting on granular solids with heat, the solids are initially heated by a certain amount of heat by means of the discharge gas that flows in the two parallel discharge gases, and It is heated only by gas, released from the furnace, and then fed to the reaction vessel and further to the furnace. Both discharge gas flows are fed by a mixture of gas discharged from the burner and the gas released from the reaction vessel. To allow the use of different conditions in the heat exchanger layer combined with two gas discharge lines into consideration. Two partial flows of the discharge gas are drawn from the reaction vessel and fed into each of the discharge gas lines. Two partial streams of gas released from the furnace are mixed, added to each part of the gas stream from the reaction vessel.

Claims (4)

1.Methods for heat treatment of fine granular materials. Especially for sintering raw cement tablets Which material for treatment Is heated first in a multi-sector heat exchanger. By means of the furnace waste gas mixture (2) and reactor (3) in two parallel waste gas lines (4,5), the material is fed alternately from one heat exchanger sector of one. Line to one sector of the heat exchanger of the other (4,5) before it was fed After heating only in the waste gas flow of the furnace (2) to the reactor (3) and then to the furnace (2) the waste gas, after which the treatment substance is heated in the exchanger sector Lean, instant heat Reactor (3) as determined in the direction of the flow of the substance. It is combined with reactor waste gas (3) to form a waste gas mixture from two waste gas lines (4,5) that has the characteristic that the waste gas Is collected from the reactor (3) in two subflows For each line, the waste gas (4,5) and the waste gas from the furnace (2) are fed as the sub-flow. In each case, the digested flow of waste gas. These from the reactor (3) 2. Method for claim 1 that has the characteristics that Furnace waste gas Was divided in the predetermined ratio According to two digested flow of waste gas From reactor (3) 3. Equipment for performing the method according to claim 1 or 2 consisting of a furnace (2), a reactor (3) located before the furnace (2) and with a multi-sector heat exchanger connected. With reactor (3) for pre-heating of the heat exchanger unit (4a, 4b, 4c, 5a, 5b, 5c) connected in series in two parallel exhaust gas lines (4,5) each through the gas supply line (15) to the gas outlet line (14) of the unit. The heat exchanger (12) is directly connected to the waste gas line (13) of the furnace (2) and to the reactor waste gas system (3), on the other hand, the discharge line (18) for the Treated from a heat exchanger unit of one waste gas line (4,5) connected alternately, feed line (19) of another waste gas line heat exchanger unit (5,4) with the characteristics that The reactor waste gas system (3) consists of two separate waste gas lines (7,8), each consisting of Each separator (7a, 8a) is connected to the gas line (15) of the waste gas line (4,5) and each to the line (14a, 14b) to the gas line (14). Of the heat exchanger unit (12) immediately before the furnace (2) 4. Equipment according to claim 3, which qualifies that the connection line (14a, 14b) between the gas outlet line (14 of the heat exchanger unit (12) immediately before the furnace (2) and the exhaust gas line (7,8 ) Of the reactor (3) consists of an adjustable limiter (16), for example a slide valve