SU1300281A1 - Rotary furnace heat-exchanging device - Google Patents

Abstract

The invention relates to the industry of building materials and can be used when firing cement clinker in a rotary kiln. The purpose of the invention is to increase the efficiency of heat transfer. The heat exchanging device consists of L-shaped elements 1 containing a stand 2 and a head 3 connected at an angle of 120-170 °. L-shaped elements are installed in a furnace in a zigzag manner with each element attached to each other or in pairs. When the furnace 5 is rotated, material is retained in the zigzag pockets. Upon further rotation of the furnace, part of the material is poured out of the pocket, and the other part of the material due to the different angle of slope of the walls of the pocket before the precipitation and at the time of precipitation is mixed. Improving the mixing of materials in the layer provides an increase in the intensity of heat transfer in the furnace. 2 Il. with "SL

Description

The invention relates to heat exchanging devices of a rotary kiln and can be used in the construction materials industry, in particular, when firing cement clinker.

The aim of the invention is to increase the heat exchange efficiency 2 |

On), 1, 1 shows the device in the scan of the furnace; in fig. 2 - oven, cross section.

The heat exchange device consists of L-shaped elements 1, made in the form of plates. The L-shaped element 1 is formed by the stand 2 and the head З. The connection of the head 3 to the stand 2 is made at an angle d, the value of which is from 120 to 170 °. The l-shaped element 1 is made slit-like, while in the case of the rack 2 and the head 3, the holes 4 are made. The opening 4 in the area projection of the element 1 can be up to 50%.

L-shaped elements 1 along 5 are set in a zigzag manner, while the axis of installation of the rows of elements 1 can be performed along the generator of the furnace 5 or along a multiple helix. The zigzag setting of elements 1 can be performed by attaching each element to each other, or elements 1 can be connected in pairs.

When pairing elements 1 are joined, I wait in pairs of elements 1 to make a gap of 0.1 to 0.9 times the height H of element 1. The size of gap a is made from the condition of a delay and subsequent pouring of the material by elements 1 during furnace rotation 5. At. the value of about 0.1 N (with the rotation of the furnace 5) the material wakes up between the elec

The presence of a gap x between the paired elements 1 ensures that the part of the material being lifted between the elements and that this improves the mixing of the material in the layer, increases the contact area of gases and material. Improving the mixing of the material in the layer during operation of the proposed device with desaturations 1, improves the mixing of the material in the layer, improves the heat transfer J5 improves the heating of the material change in the furnace 5. However, heat transfer improvement of heat transfer is advantageous and increases when up to 0.9 times the height H of element 1. When fed in a furnace. When transferring material from zigzag pockets increases w: the touch of contact

A gap of more than 0.9 is the magnitude of the high-JQ material with a gas flow; in connection with H of element 1, the material between the MeHTaNH element is not delayed and practically no improvement in heat transfer is achieved. The elements 1 to the furnace body 5 are fixed with brackets 6. Inside the furnace 5, they are covered with refractory lining 7. The heat exchange elements 1 are made mainly of heat-resistant steel casting. As a result, the heat exchange rate in the furnace also increases.

Formula 1 of the invention

Heat exchanging device of the rotary kiln, which contains L-shaped elements connected in pairs to the kiln body;

Copies 1, in particular, spent grates of the grate cooler used for cooling clinker can be used.

The heat exchange device operates as follows.

When the furnace 5 rotates along the furnace, the elements I installed in rows I hold the material, preventing it from sliding along the surface of the lining 7, and this increases the angle of material lifting. In zigzag pockets, the material is retained by the walls of the element 1, and the angle of elevation of the material increases further.

Upon further rotation of the furnace 5, the material is poured out of the zigzag pockets. Due to the fact that the walls of the pockets are made of L-shaped elements 1, when a part of the material is pulled out of the pocket of the other part due to the different angle of inclination caused by the material lying on different planes connected at an angle before height and at the time of precipitation, shuffled in pocket and outside of 5 Arman.

The presence of the holes 4 in the element 1 ensures the spillage of the material through the wall of the element 1 and this improves its mixing in the layer, improves the flow of material flowing through the holes 4 with gases.

The presence of a gap x between the paired elements 1 ensures the penetration of a portion of the material being lifted between the elements and this provides an improvement in the mixing of the material in the layer, increases the contact area of the gases and the material. Improving the mixing of the material in the layer during operation of the proposed device provides improved heating of the material and increases the intensity of heat

It bakes the improvement of material heating and increases the intensity of heat

exchange in the oven. When transferring material from zigzag pockets increases w: the touch of contact

gas flow material in conjunction

whereby the intensity of heat exchange in the furnace also increases.

Formula 1 of the invention

A rotary kiln heat exchanger device containing L-shaped elements attached in pairs to the kiln body, distinguished by 31002814

ee with the fact that, with the aim of elevated, and between pairs of elements

nor the efficiency of heat transfer, the elements of the mustache. Aligned along the zigeav furnace is a gap of 0.1 to 0.9 times the element height.

fi9. 2

Claims (1)

Claim A heat exchanger of a rotary kiln containing attached cops 1 mainly of heat-resistant steel casting. As an element to the furnace body, coupled L-shaped elements are distinguished, I distinguish 3 1300281 4 by the fact that, in order to be more precise, and between the pairs of elements of the heat exchange efficiency, an electric gap of 0.1 to along the zigza furnace - 0.9 element height values. FIG. 2