SU954741A1 - Method of heat locking of tunnel furnaces and dryers - Google Patents

Description

(54) METHOD OF THERMAL BLOCKING OF TUNNEL FURNACES AND DRYERS

one

The invention relates to the production of ceramic wall materials, mainly brick and ceramic stones, as well as ceramic drainage pipes, and can be used in the manufacture of building materials and products.

There is a method of thermally blocking tunnel kilns and dryers with shrinkage zones and drying the material by taking hot air from the cooling zone of the furnace and flue gases from the heating zone, feeding them into the dryer in the final section of the shrinkage zone of material i,

A disadvantage of the known method is that it does not ensure the full utilization of the heat extracted from the furnaces, and flue gases do not enter the workrooms.

The purpose of the invention is to increase thermal efficiency.

The goal is achieved by taking out the spent heat carrier from the initial part of the final drying zone to

the mixture is 60-90% and is mixed with hot air, and the remaining part of the spent coolant is directed to the final part of the shrinkage zone in countercurrent p material.

FIG. 1 shows a diagram of a tunnel kiln and dryer, cross section; in fig. 2 - the same, top view.

The scheme for implementing the proposed thermal interlocking method includes a tunnel furnace 1 and a dryer 2 connected between a ventilation system comprising a fan 3, a mixing chamber 4, a fan 5, supplying heat-transfer agent to zone 6 of dryer drier 2, and fan 7 selecting heat carrier from the drying zone 6, which make up the air supply circuit from air from the cooling zone 8 of the furnace 1 to the zone 6 of the dryer 2, and the fan 9, the mixing chamber 1O, the fan 11 supplying the heat transfer fluid to the final part of the drying zone 12 of the dryer 2 and fan 1 3 selection of the spent coolant from the initial section of zone 12, comprising the flue gas supply circuit from heating furnace 14 to the final heating unit 14, section 12 of the dryer 2 shrinkage. The material is placed on heat sinks 15. Between the shrink zone 12 and the drying zone 6 the bearings 2 contain a partition 16. Atmospheric air 6, chamber 4 is fed along arrow A, and into chamber 1O — along arrow B. A method of thermally blocking the tunnel furnace 1 and dryer 2 according to the scheme shown in FIG. 1 and 2 are carried out as follows. Hot air from zone 8 of furnace 1 is fed by fan 3 to mixing chamber 4, where arrow A serves atmospheric air and exhaust coolant from the dry-air dryer 6 zone 6 ventilator 7. From chamber 4, a mixture of hot air, atmospheric air and exhaust the heat carrier by the fan 5 is directed to the initial part of the drying zone 6. Moreover, from the final portion of the final drying zone 6, the spent heat carrier is taken, which is sent to chamber 4, the remaining part of it is supplied in countercurrent with the material placed on the trolley 15, into the drying zone 12 of the dryer 2. The amount of this portion is

the heat carrier can be adjustable partition 16.

In the final section of the shrinkage zone 12 of the dryer 2, in addition to the part of the spent coolant coming from zone 4, a mixture of flue gases is supplied by the fan 9 from the heating zone 14

A portion of the spent coolant is directed towards the final portion of the shrinkage zone in countercurrent with the material.

Sources of information taken into account in the examination 1. USSR author's certificate NO 578545, ce. F 27 B 9 / GS, 1976. Heat 1 to the mixing chamber 1O, atmo-mogenic air supplied along arrow B, chamber 10, and the exhaust coolant taken from the initial part of stage 12 are shrinkage of the dryer 2 by the fan 13. Thus, part of the exhaust coolant in the amount of 10-40% is directed in the flow of the material from the end portion of the drying zone 6 of the dryer 2 to the final portion of the drying zone 12, provides an increase in thermal efficiency of the tunnel kiln 1 and dryer 2. Formula of the invention Thermal blocking method of tunnel kilns and dryers with shrinkage zones and drying Material by taking hot air from the furnace cooling zone and flue gases from the heating zone with feeding them to the dryer in the final section of the material shrinkage zone, characterized in that, in order to increase thermal efficiency, the exhaust coolant is taken from the initial portion of the drying zone in quantity. 60-9O% and mix with hot air, and the rest

Claims (1)

The claims of h ' The method of heat blocking tunnel kilns and dryers with shrink and dry zones of the material by taking hot air from the cooling zone of the kiln and flue gases from the heating zone and supplying them to the dryer in the final section of the shrink zone of the material, characterized in that, in order to increase thermal efficiency , the spent coolant is taken from the initial portion of the drying zone in an amount. 60-90% and mix it with hot air, and the remaining part of the spent coolant is sent to the final section of the shrinkage zone in countercurrent with the material.