SU1339379A1 - Heat-treating furnace - Google Patents

Abstract

The invention relates to hot-duty devices and can be used in low-temperature furnaces of man-made construction and metallurgical enterprises. Pe I) increase the efficiency of the furnace due to the intensification of convective heat exchange and low-low-temperature te furnaces. The furnace contains a lining working chamber 1 with sub-meters 4 and gas-burning devices 2 located in HjaxMaTHOM order in external fire chambers 3 located under the hearth 4. Remote races 3 are communicated via vertical1) New channels 5, smoke boxes 6 and coaxially) 1 openings 7 in refractory non-enclosures 8 with a working space 9. Refractory non-enclosures 8 of auspices in the wall of the working chamber 1, with openings 7 in the partition 8 on the side of the gases entering the working space 9 in the form of a smoothly narrowed truncated cone, and coaxially spaced holes in the opposite: the cut-away partition - in the form of a smoothly-spreading of the truncated cone. 1 a.ii. f-ly, 2 ill. А-А (L оо со о со 00

Description

one

The invention relates to heating devices and can be used in low-temperature heat-treating furnaces for industrial and metallurgical refineries.

The purpose of the invention is to improve the efficiency of the operation due to the intensification of convective heat exchange in low-temperature thermal furnaces.

FIG. Figure 1 shows a thermal furnace (section A-A in Fig. 2); in fig. 2 times cut B B in FIG. one.

The furnace contains a lined working chamber 1 with a node and i-azo burner devices 2, arranged in a cheat order in external fire chambers 3, located under the hearth 4. Remote combustion chambers 3 are connected by a vertex. 1X1OX channels 5, smoke collectors 6 and the mixing holes 7 in refractory partitions 8 with working space 9. Refractory partitions are installed along the side walls of the working chamber, and the holes in the partition from the side of the gases entering the working space are made in the form of a smoothly narrowed truncated cone, and coaxially arranged holes in the opposite partition - in the form of a smoothly widened f) of the truncated cone.

The furnace works as follows.

Combustion products from the vertical fireboxes along vertical channels enter the smoke collectors, from which they flow out through the openings into the working area. When gases move in remote furnaces and channels, they are partially cooled, warming up under. Further cooling of the gases occurs during heat transfer to the heated products. At the same time, the paciio.iaraKvr holes are so far from the bottom to provide the most intense heat transfer to the metal. For example, for a cage consisting of springs, one-piece through the furnace through a conveyor, the axis of the holes and the springs should be placed in one horizontal

339379

ten

15

20

25

thirty

35

plane. Further, the flue gases pass through the fences in opposite passages 1) and are partially sucked into the remote ones. Furnace gases, which are not involved in recirculation, are discharged from the working space through the flue gas ducts. Thus, the use of the proposed 1-furnace furnace instead of the known low-temperature heat-treatment furnaces with subfloor lids allows you to isspecify the xscvective heat exchange by accelerating the flue gas flow at the entrance to the working chamber, and also increase the uniformity of HaijieBa, which is caused by an increase in the recirculation rate of As a result, the efficiency of the furnace is increased due to a decrease in the specific fuel consumption and an increase in the quality of the thermal blanking of products.

Claims (2)

Invention Formula  A thermal furnace containing a lined working chamber with a gas hearth and gas-burning devices located in the take-out} of the first fire chambers and communicated with the working chamber through coaxially arranged openings in the refractory partitions installed along the side walls of the furnace, and smoke boxes adjacent to the refractory partitions, the fact that, due to the efficiency of the operation, due to the intensification of convective heat exchange in low-temperature heat-treating furnaces, the opening in the partition from the side of the This chamber is made of a thinnest truncated cone from an external tank, and is located coaxially with apertures in the opposite side of the partition plan of the truncated cone, while BbinocHiiie kp is located under the furnace. 2. The furnace according to claim 1, characterized in that the opening at the entrance to the working chamber has a taper of 40 - (JO, and the holes in the opposite partition I) 2. Fig 2 BH11I1111.iHK.n 42 (И1; 30Гир; 1 Г -42I l.l; lmin, l I lp (iM: iH (i. IcTBi ii () - || 1K 1NG | 1; | features K (And pr1 LP1) and so on. I Uzhgorod. | Proemna. 1