SU1404768A1 - Preheating filter of rotary furnace - Google Patents

Abstract

This invention relates to a heat exchange technique and may be used. but in the industrial construction materials. The purpose of the invention is to increase the efficiency of heat transfer and reliability of operation. The heater filter contains central, peripheral or longitudinal cells formed by partitions made of flexible elements with rods 3 fixed to them with gaps or without gaps. Flexible elements can be attached to the rigid frame 8 or can form trays from part of the partitions. Additional rods can be placed perpendicular to them in the gaps between the rods 3. The sludge through the gaps between the rods 3 in the form of rain disperses throughout the cross section of the furnace 1, which ensures good heat exchange and dedusting of gases. Self-cleaning elements of the filter-heater makes it reliable in operation. 2 hp fl1, P il. with (L with

Description

| 4

about

four

O5 00

Mr.J

 5 figure 1

The invention relates to the technology of t-exchange in rotary kilns and can be used in industrial construction materials.

The purpose of the invention is to increase the efficiency of heat transfer and reliability.

Figure 1 shows a filter heater with a central and peripheral cells5 longitudinal section; FIG. 2 is a section A-A in FIG. on fig.Z - section bb in figure 1; in Fig. 4, a filter with a longitudinal cell heater can be connected by means of flexible elements of clamps 11 in the corresponding pack of rods 3. When connected to it 3 by means of flexible elements (for example, a chain), rods 3 are curved on both sides, close Other, because if they are placed only on one side, then they will not fit together with the tray of 80 °. When connect

mi, longitudinal section; in FIG. 3 - se-, 5 rods 3 with the aid of yoke b-b in FIG. four; 6 is a filter heater with trays, a longitudinal section; figure 7 - section GG in figure 6; on fig.Z - section dd in figure 6; figure 9 - node I figure 6; 20 in FIG. 10 — a filter heater with additional rods installed in the gaps between the rods, a longitudinal section; figure 11 - section EE in figure 10.25

Inside rotary kiln 1, radial or longitudinal flexible elements, such as chains x 2 and closed flexible elements, are fixed

rods x 3 make grooves, rye and clamps 11,

On chains x 2, the rods 3 can be folded with the help of the clips 12. To prevent sliding of the clips of the rods 3, limiters 13 are drawn on the ends of the latter.

At the furnace body 1, the rods 3 are mounted on the chain 2 close to the ground. In the gaps between the rod, the rod can be freely installed. 14. The number of chains 2 arcs with the calculation of the condition ensures the specified resistance

rods 3, which make up partitions, 30 hot gases, taking into account the effects

ki, which form the central cell 4, peripheral cells 5 or longitudinal cells. Fixed on the flexible elements, the rods 3 can form only part of the partitions and thus form locks. (One section is shown, but in reality there may be several, and one can be rotated relative to the other). Inside cell 4, chains 6 are fixed at one end to the rods m 3 and in both cells 5 at both ends of the chain 7. To ensure greater mobility of partitions of chains 2 and rods 3, chains 2 can be attached to a rigid frame 8 consisting of separate independent elements to prevent destruction from thermal elongations, which repeat the shape of the cells 5 and are calculated on the strength of the weight of the chains 2,6 and 7 and the rods 3.

In the longitudinal partitions, the latter are partially in the form of trays, one end attached to the partitions.

the other end of the trays is fixed to the passage of hot gas ke 9, which can be hollow and oh- (the more chains 2 in one section, enclosed by a cooling; given agent, for example air. On both sides, the rods 3 can adjoin

the more heat exchange is). In the absence of rigid cages, the chains 2 retain the shape of the cells 4 and 5 due to the tension

which are attached to the corplots 10, sous kilns 1.

The rods 3 can be interconnected by means of flexible elements or clamps 11 in the corresponding grooves of the rods 3. When the rods 3 are connected by means of flexible elements (for example, a chain), the rods 3 are attached to it on both sides close to each other, since they are only placed on one side, then when the tray is rotated by 80 °, they will not fit together. When connecting

rods 3 using clamps

rods 3 using clamps

11 on the cottage x 3 make grooves, rye and clamps 11,

On chains 2, the rods 3 can be connected by means of the clips 12. To prevent sliding of the clips 12 from the rods 3, limiters 13 are welded on the ends of the latter.

At the furnace body 1, the rods 3 can be mounted on the chain 2 close without gaps. In the gaps between the rods 3, the rods 14 can be freely installed. The number of chains 2 is determined by calculating the condition of providing a predetermined resistance to passage

all the rods 3 and 14 are on it. The number and size of the cells 4 and 5, and hence the length of the rods 3, are determined by thermal calculation from the condition of heating the sludge to a predetermined temperature.

The diameter of the rods 3 is determined by the calculation of the bending due to the weight of the chains 6 and 7 sec attached to them.

considering heat loads. The number of rods 3 is determined constructively from the condition of fastening them closely on chains x 2 or with design clearances if skip sludge is required

for spraying in the cells 4 and 5. The gaps between the rods 3 are determined from the condition that the sludge passes through all the gaps (if you make large gaps, then

the sludge is immediately discharged through the gaps closest to the furnace body). The number of chains 2 in one section of the furnace is determined by the calculation from the condition of providing a given hydraulic resistance

the passage of hot gases (the more chains 2 are in one section,

the more heat exchange is). In the absence of rigid cages, the chains 2 retain the shape of the cells 4 and 5 due to the tension

3

ki, and therefore the mobility of the walls of the chains 2 and rods 3 is small.

If there is a rigid frame 8 of the Tspi 2 between them and the furnace body 1 and the chain 2 in the areas between the points of attachment to the component of the frame 8, they can have slack and then the chains 2 with the rods 3 can have the mobility specified by the conditions of self-cleaning.

In the longitudinal partitions, the length of chains 2 is longer than the chord, connecting the suspension points so that the lower chains 2 do not lie on the furnace body 1 and do not come into contact with the rods 3 attached to adjacent chains x 2.

The length of the rods 14 is taken 1-10% less than the size of the chord on which it is mounted. In this case, it should be ensured that the rods 14 are not slipping off the upper chains 2. The number of chains 2 put on the rods 3 is determined from the condition of excluding the package of rods 14 between the constraints 13.

The dimensions of the clips 12 are boring from the condition of their free movement along the rods m 3.

The length of the chains 6 is taken from the condition that the free end touches the slope of these chains 6 in the lower part, and the length of the chains 7 is determined constructively to ensure the slack required for their self-cleaning.

The number of rods 3 secured to the furnace body 1 on chains x 2 without a gap is determined from the condition that they ensure that the estimated quantity of sludge is scooped.

Filter heater works as follows.

 The sludge due to inclination and rotation of the furnace enters the partitions formed by chains 2 with rods 3 and rises as the furnace 1 rotates. Then the sludge dissipates through the gaps between the rods 3 in the form of rain throughout the entire cross section of the furnace, which ensures good heat exchange and dedusting of passing hot gases. When turning the furnace 1 by 180, the slack of chains 2 changes (rods 3 above chains 2, and after 180 they will be below chains 2), which contributes to self-cleaning of rods 3 and the gaps between them.

0

Rotating the furnace 1 by 180 ° and changing the sag of the chains 2 relative to the furnace 1 in the opposite direction causes them to move relative to the rods 14 by two times the amount of sag and self-cleaning all interconnecting elements, since the rods 3 and 14 can be rotated. The sludge, before reaching the filter preheater, wets its elements, and the passing hot gases heat it. Moreover, if the furnace body 1 has a part of the rods 3 mounted on the chain 2 without gaps, then more sludge rises up and then is drained along the elements of the preheater. When part of the longitudinal partitions of the rods 3, forming trays, a layer of material from the partition due to the inclination of the furnace 1 along the material begins to enter the tray and move along it until it hits the furnace body 1. When the furnace 1 turns 180 180 ° tray of

five

0

The rods are also inverted by a 180 ° weight and the whole process is repeated, while the trays are self-cleaning. When rotating the furnace sludge

the central and peripheral cells 4 and 5 enter the cells 5 and rise into them, wetted by the chain 7. Part of the sludge is sprayed through the gaps between the rods 3 in the cells 5 and also gets into the cell 4.

The hot gases come in contact with the slurry on the chains x 2 and splashed through the gaps between the rods 3, which provides for body exchange and better tracing.

The mobility of the walls of the chains 2 and rods 3 provide the exception of the stuck cells 4 and 5.

The use of filter heater increases the efficiency of heat transfer

and plowing up due to a more complete overlap of the furnace cross-section, which ensures saving of fuel and raw materials and an increase in the productivity of the furnace.

Self-cleaning of preheater elements increases reliability of operation, which increases production output.

Claims (1)

Claim 1 A rotary kiln filter heater comprising internal partitions forming the cells, which also have a partition to ensure reliability of operation. eo . ge ° -BUT 3 Fygl B-8J I am 9. 0000.4 doojoS. Dd FIG. eight U 9 FIG. eight YYY YU 7 77 ® Fiz.Z  / 2 7J Hot gases J Fig.Yu