SU1435905A2 - Rotary furnace preheating filter - Google Patents

Abstract

This invention relates to a heat exchange technique for rotating furnaces that can be used in industrial and building materials. The purpose of the image of the 7th retente is to increase the efficiency of heat exchange, dust collection and reliable operation of the furnace. The filter preheater contains a chain curtain 2 of the rotary kiln 1 with a free space 3 in the lower part, in which a stepped drum 4 with chains 5 is freely positioned, limited from axial movement. The diameter of the drum part entering the free space 3 is approximately equal to the size of the free space 3, and the larger diameter of the drum 4 exceeds the smaller by about two thicknesses of the chain layer in the nauseous part of the curtain 2. 1 Cp. f-ly, 2 ill. A (P has eaten; about JV N) 9U.Z.1

Description

The invention relates to a technique of heat exchange in rotary kilns, can be used in the industrial building materials and is an improvement of the invention according to the author. St. No. 800555.

The aim of the invention is to increase the efficiency of heat exchange, trapping and reliability of the furnace.

FIG. 1 shows a furnace, longitudinal section; in fig. 2 shows section A-A in FIG. one.,

Inside the rotary kiln 1, a chain-curtain 2 is hung with space free from the chains in the upper part 3. In front of the chain-curtain 2, if you look along the material, it is freely positioned. wives speed drum 4 with freedoms

five

a section of the drum 4 of a smaller diameter of such a quantity of material (spam), which will ensure good wetting by the tsetsey 5. The remaining dimensions are determined structurally and tested for durability and operability.

The filter heater works as follows.

The material (sludge) due to rotation and inclination of the furnace 1 moves from left to right. After reaching the drum 4 that rolls in the lower part of the furnace 1, it enters partially into it and wets the chains 5, first in the larger diameter section and then in the smaller diameter section (after passing through the wall 6 or lifting the blade 7). The rest of the slurry in the lower position

Novel with 1 chain 5, and its less-20 wets the chains of the chain curtain 2.

Hot gases are sucked through furnace 1 from right to left and come into contact with the chains of curtain 2 and chains 5 of drum 4, while they are deposited on them (the sticky diameter is approximately equal to the size of the free space 3, and parts of space 3 are larger than the size of the smaller diameter of the drum 4.

Instead of the wall 6 in the drum 4 can be installed pushing the blades 7. in the form of buckets. The locking ring 8, fixed coaxially with the furnace 1 on the brackets 9, serves to prevent the drum 4 from moving downward from the predetermined position along the material along the slope of the furnace 1.

The size of the chain curtain is 2 and free. leads to savings in fuel and raw materials, and

40

Space 3 is determined by thermal calculation from the conditions for providing a given heat exchange between the material and the hot gases drawn through the furnace 1. The diameter of the drum 4 of a smaller diameter is determined from the condition of creating a predetermined resistance to the passage of gases in space 3. The length of the drum 4 of a larger diameter is approximately equal to the length of the smaller diameter in order to ensure that the bottom friction is extremely intense. parts of space 3, which can occur when the drum 4 rolls over. The length and number of chains .5 are also determined from the condition of the created and specified resistance by the whole ram 4. The inner diameter of the ring 8 is determined from exceptions

50

Improving the uniformity of rotation of the drum 4 will ensure more reliable operation, which will increase the output of the finished material due to the more stable operation of the furnace 1 and the elimination of stunts due to jamming of the drum inside the curtain 2.

Formula and 3 gains

1. Filter rotary heater with a furnace on the author. St. No. 800555, characterized in that, in order to increase the efficiency of heat exchange, dust collection and reliability, the drum is stepped, the smaller diameter section is made with a diameter equal to the average diameter of the chain-free space of the chain zone, and the cross-section of the drum 4 through it. - laid in it with support on fixables, the number and configuration of pushing blades 7 are determined by calculation from the condition of supply inside

Hot gases are sucked through furnace 1 from right to left and come in contact with chains of curtain 2 and chains 5 of drum 4, while drinking is deposited (sticks) and heat exchange is provided, with drum 4 entering inside space 3, ensures uniform distribution of the gas flow over the cross section of the furnace 1, effective pressure control and heat transfer during rotation of the drum 4 without much oscillation of its axis.

The use of a filter preheater will improve the efficiency of heat exchange and more efficient

Improving the uniformity of rotation of the drum 4 will ensure more reliable operation, which will increase the output of the finished material due to the more stable operation of the furnace 1 and the elimination of stops due to jamming of the drum 4 inside the curtain 2.

Formula and 3 gains

Claims (1)

1. Filter heater rotary kiln according to ed. St. No. 800555, characterized in that, in order to increase the efficiency of heat exchange, dust collection and reliability, the drum is stepped, and a smaller diameter section is made with a diameter equal to the average diameter of the chain-free space of the chained zone. a ring in the place where the diameter of the drum changes, and the larger diameter of the drum exceeds the smaller by two tal. The 1CNN layer of the chain curtain in the lower one is equipped with a banana mounted inside the enclosure at the transition from a larger diameter r2, Filter-preheat-ng according to claim 1, to the smaller ones pushing it apart in the form of buckets. 9u, z.2