SU976246A1 - Rotary furnace heat exchanger - Google Patents

Description

(54) ROTATING FURNACE HEAT EXCHANGER

I

This invention relates to a heat-transfer technique in rotary kilns and can be used in the building materials industry.

A rotary kiln heat exchanger is known, which contains cells formed by longitudinal partitions with cutouts on their outer sides on the discharge side of the material and valves mounted on the furnace body that overlap the cutouts in partitions 1.

In such a heat exchanger, the material moves through the cells with lifting and pouring, which ensures good material contact with gases and heat exchange. On the discharge side of the material from the cells, the valves in the lower position, under the influence of their weight, lie on the material and allow the material to pass through the cutouts without being lifted into the gas flow. Material raised in. the gas flow to the cut-outs moves along the cell partitions at an angle to the radial direction due to the furnace slope and, having entered the section of the partitions with the cut-outs, lice are poured,

where the valve has already closed the cut-out and, thus, material does not fall into the gas flow and dust generation does not occur 1.

A disadvantage of the known heat exchanger is its low efficiency due to J destruction of material granules and some dusting when the valves are opened in the lower position in the material layer, which occurs sharply under the influence of gravity after the valve has moved through the center of the valve body.

d dead center.

The aim of the invention is to increase the efficiency of heat transfer.

This goal is achieved by the fact that in a heat exchanger of a rotary kiln containing cell cells formed by longitudinal partitions with cutouts on their outer sides on the discharge side of the material and valves fixed on the furnace body,

The JO valves are mounted for movement along the baffles from the actuator.

Claims (1)

In such a heat exchanger, when opening the valves, there is no destruction of grail and dusting. FIG. 1 shows a furnace at the site of installation of the heat exchanger, a longitudinal section; in fig. 2 - section AA on fng. one; on fng. 3 - {view AA in FIG. 1 with another arrangement of partitions. Inside new 1 there are partitions 2, which form cells 3. The length of the transition 2 along the axis n their number is determined by thermal calculation. On the discharge side, in the partitions 2 there are cutouts 4, the dimensions of which along the axis of the furnace 1 are determined by the slope of the furnace 1 and the fluidity of the material (the greater the slope of the furnace 1 and the fluidity of the material, the larger the size of the notch 4 along the axis). With this, the condition of the absence of osteni is observed in the flow of raaoie material, which moves as shown by the arrow in FIG. 1 (due to the furnace slope). The size of the notch 4 across the axis of the furnace 1 is determined by the height of the material layer (the larger the material layer, the larger the notch 4). In this case, the exclusion of material lift into the gas flow at the cutout section 4 is observed. The cuts 4 are blocked by valves 5, which can mix perpendicularly to the axis of the furnace 1 on the rods 6 and the rods 6 pass through the glands 7 to the 1ns outer side of the furnace 8. Between the body of the furnace 1 and the lugs 8 are installed springs which, in the expanded state, press the valve 5 to the body of the furnace 1. The dimensions of the valve 5 are determined by the dimensions of the notch 4. The length of the rods 6 is equal to the size of the notch 4, the axis of the furnace 1 plus the length of the spring 9 in a compressed state nii. The length of the spring 9 in a compressed state is determined from the condition of providing the necessary force to press the valve 5k of the furnace 1. The diameter of the rods 6 is determined on the basis of the bending of the weight of the valve 5 and the material. Under the furnace 1 in the area of the stops 8 there is a fixed copier 10 in which the stops 8 abut. Its circumferential dimensions are determined from the condition of opening the valves 5 in the lower position and maintaining them 64 in this position until it leaves the material. The size of the copier 10 along the axis of the furnace 1 is determined from the conditions of the stops 8 fixed in it at any axial position of the furnace 1. The thickness of the copier 10 is determined from the conditions of strength. The heat exchanger operates as follows. The material due to inclination and rotation of the furnace 1 moves in the cells 3 with lifting and pouring. At the same time) when the furnace 1 rotates, the stops 8 in the lower position are placed in the copier 10 n, the valve 5 is opened, as a result of which the material in the cells 3 in the section of the cutouts 4 is not fed upwards by partitions 2, which prevents the material from flowing into the gas flow from the hot side furnace 1. Upon exiting the stops 8 of KOHTaKta with a cam 10, the valve S closes the cutout 4 under the influence of springs 9, so there will be no dusting when the material is drained through the cutout region 4. Actuator for valves 5 Can be made as usual P ivoda n dvngatelem with gear (not shown). The use of the proposed heat exchanger will increase its efficiency due to the elimination of the destruction of the material granules and the pie. This will result in fuel savings. The invention The heat exchanger of a rotary kiln containing cells formed by longitudinal partitions with cutouts on their outer sides on the material discharge side and valves fixed on the furnace body, blocking the cutouts in partitions that are designed to improve the efficiency of heat exchange movement along partitions from the drive. Sources of information taken into account during the examination 1. USSR Copyright Certificate № 754182, cl. F 27 В 7/16, 1978 (prototype). / I n