SU1044935A1 - Tunnel multi-channel oven - Google Patents

Abstract

1. TUNNEL MULTICHANNEL-. NANIA FURNACE for firing ceramic products, mainly abrasive tools, containing a composition of refractory in the working channel; ev ::; V:. JffiVff fto oepeea ITplit, a pushing mechanism for moving them over the supporting surfaces through the heating, burning and cooling zones, gas-burning devices located in the combustion zones between the working channels, in order to reduce energy costs, in the set of working channels At the junction of the burning and cooling zones, windows are made that connect the working channels with the combustion zones. 2. A furnace according to claim 1, in accordance with clause 1, so that the length of the combustion zones is equal to the length of the burning and preheating zone. (L CO oo SP; v; i :: -: -..-:; - /. W. Zone. Jfff / y ffy-ffffždev (// f (pue.i

Description

The invention relates to ceramic kilns, for example, an abrasive tool, and can be used for E abrasive, ceramic, radio ceramic, diamond and other industries of the bone. A well-known tunnel multi-Russian muffle furnace, comprising in each working channel a composition of refractory plates, pushing the mechanism for their movement along the supporting surface through the heating, roasting and cooling zones, gas burner devices located in the combustion zones between the working channels l. A disadvantage of the known furnace is the low thermal efficiency of physical heat loss with waste heated air from the furnace cooling zone. The products in the known furnace are effectively cooled by air flowing directly into the working channels on the discharge side of the furnace due to the flue gas generated by the windows at the beginning of the working channels. However, since the temperature in the working zone in the working channels is 1250-1270 ° C, it is necessary to spend some of the heat on the heating of the ballast air coming from the cold zone. The purpose of the invention is to reduce energy costs. This goal is achieved by the fact that in a furnace containing a composition of refractory plates in each working channel, a pushing mechanism is for; moving them over the supporting surfaces through the heating, burning and oxidizing zones, gas-burning devices located in the combustion zones between the working channels, windows connecting the working channels with the burning zones are made. In addition, the length of the combustion zones at the length of the burning and preheating zones. FIG. 1 shows a tunnel multichannel furnace, a longitudinal section along the axis of the channels; in fig-. 2, section A-A in FIG. one; FIG. 3 is a section BB in FIG. 1. The tunnel multichannel furnace contains working channels {muffles) 1 along which the pushing mechanics 2 move the composition of the refractory plates 3 with the products 4 along the supporting surfaces 5 through the heating, firing and cooling zones. The heating of the furnace is carried out by gas-burning devices b, located in the combustion zone 7 with the output of combustion products between the roof plate 1 and the plates 8 and the bottom of the working channels. The tunnel multichannel furnace operates as follows. ; -13 pieces 4, laid on the refractory plates 3, are pushed by pushing. Hi-vi b: 1. With the mechanism 2, the entire composition moves to the working channels 1, npi-L, and the fireplaces with burning articles gradually go through the heating zones of the black lead and cooling rie4ii according to the preset heat treatment mode (pushing within one plate. pedal /. then loading in the duct –1 the pd- / o4i-ix channels of the furnace; 4i-ix channels are made of 9 l-pc of the organic products impurities of products, creating micron order 1-0, 5 (1; O): M in; d,;: t ,; P billet in the working channels of the furnace, 1-1; ed u-: fudyuyuyes lybyvaya out gaseous flue-gas: - gera leaks V h delkey, t-armopar1, liboua, etc.) and the oxidative atmosphere in the city of Hech (provision: ocht ,;: -U.luctance; high-quality 7 ”; post-cold cold air for: cooling and product ;: into the working channel: ::, - tagl is provided with a spacing of hej ij. ;;:. ir g. ;;; - given in / and in space between slave .mmi channels forced or. natural throat with flue gas extraction through windows 10, as well as vypols; -: letters of working channels with a slope of 1: 100 to the unloading side behind;: even - geometric pressure. When moving v.tol workers kanALS5V cold in-edukh not: a tool washes the product and. the internal surfaces of the working channels, heating up, cool them down and come to the burning area with a temperature of about 1000 ° C. At the junction of the cooling and firing zones on your own;:, e working channels, windows 11 are made, -through which the heated air enters as secondary air to combustion zone 7. The cross section of the window runs out of no more than sechenk working channel. The air flow rate in gas-burning devices b is maintained at a level of L 0.8, and in the combustion zone 7, by supplying secondary air, the air discharge coefficient increases to L 1.2. This allows the complete combustion of gas to be organized and the highest combustion temperature in the space between the working channels of the combustion zone and in the burning tunnels is obtained. x gas-burning devices, arranged in the side walls of the furnace, -g; leading to large heat accumulation by walls, their overheating and the impact; 1 total heat loss. Selection,:; Omio ;; x-gases -from the burning zone through windows 10 is controlled while the furnace is in operation with gates 12, followed by feeding through flue 1 to fume Ij. In this pipe, flue gases are withdrawn from the working channels through windows E with gates 1.

The temperature and hydraulic modes of firing are automated by installing appropriate counter measure and control equipment.

By making windows in the roof of the working channels, hot air is supplied from the cooling zone of the working channels to the combustion zone above them without the use of special blowing devices. Air enters due to the geometrical pressure and due to the rarefaction in the combustion zone created by the extraction of exhaust gases from the space between the working channels at the beginning of the furnace.

Running windows precisely at the junction of the burning and cooling zones ensures the supply of secondary air.

to the combustion zone with the maximum temperature attained in the cooling zone (above 1.000 ° C).

The resources of physical heat coming from the air cooling zone 5 are fully utilized, since there is practically no heat loss when it moves into the orenia zone.

By directing air into the combustion zone from the cooling zone, the cost of heat for its further heating in the calcining zone of the working channels to the final calcination temperature, where it would enter as 5 ballast, is excluded.

Taken together, this will increase the thermal efficiency of the furnace by at least 10%.

FIG. 2

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Claims (2)

1. TUNNEL MULTI-CHANNEL FURNACE for firing ceramic products, mainly abrasive tools, containing in each working channel a composition of refractory plates, a pushing mechanism for moving them along the supporting surfaces through the heating, firing and cooling zones, gas burner devices located in the combustion zones between the workers channels, characterized in that, in order to reduce energy costs, in the set of working channels at the junction of the firing and cooling zones, windows are made connecting the working channels with the combustion zones. 2. The furnace according to π. 1, with the fact that the length of the combustion zones is equal to the length of the firing and heating zone. _with $ s SU,. ,, 1044935 Cpue.i