SU1449812A1 - Multihearth vertical muffle furnace - Google Patents

Abstract

The invention can be used in metallurgy, chemical industry, and other areas for thermal decomposition of materials, as well as for firing. The purpose of the invention is to increase maintainability by making the furnace out of modules. The furnace contains carrier racks 1 and modules fixed on them, the lateral surface of which forms the furnace body. The modules are made of heat-resistant steel and contain a shell 2 with outer brackets 3 and an inner flange.4, thermal insulation 5. The furnace is equipped with a rotating shaft 8 with paddles 9 and blades 10 for mixing the material, key 11, with an electric drive 19. Repair is carried out by replacing This module is in a spare. 1 il. i (L 00 n yu

Description

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The invention relates to printing and can be used in metallurgy, chemical production: TI and others for the thermal decomposition of materials in order to obtain a pure product, as well as for firing.

The purpose of the invention is to improve maintainability due to the implementation of furnaces and modules.

i The drawing shows a miogopopova vertical muffle furnace, a slit.

The furnace contains the carrier rack 1 and the modules mounted on them. Each 5 module includes a shell 2 with an outer arm 3 and an inner bracket:; ring flange 4, heat insulation 5, heat carrier chamber (S with inlet and outlet fuel gases of the nozzle 20). The heat carrier chamber 6 rests on the inner ring flange 4,

. The central rotary shaft passes through the modules. 1Shch ys shaft 8 with strokes 9 and blades 10 fixed on them.

The stove has a lid II. To transfer material from one module to another, there are either a central hole 12 or a peripheral hole.

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carrier 6, the operating temperature in the muffle space of the upper module is 400-430 C. At the same temperature, thermal decomposition of magnesium nitrate begins.

The melt is charged when the drive 19 is turned on. When the central shaft 8 rotates with the paddles and blades 10, the material is mixed and moved either from the periphery to the center or from the center to the periphery, depending on the arrangement of the blades 10. Simultaneously, the magnesium nitrate melts and turning it into a powder state (granules). Through the central hole 12, the material is poured into the muffle space 21 of the lower module, where further thermal decomposition takes place. Here the material moves from the center to the peripheral opening 13, on the next hearth 25 the material moves from the periphery to the center, etc.

The material is discharged through the discharge opening 23.

Reaction gases generated in

Listing 13. To provide a hermetic-30 thermal decomposition

The gates between the modules are provided with an out- put, for example, in the form of a sand seal 14, there is also a seal 115 between the cover 11 and the upper module 1. On the bridge 11, a patru-5k 16 is provided for loading the material and a nozzle 17 for discharging the reaction gas: SE, as well as rollers 18 for the centering 8. The central shaft 8 is connected to the actuator 19.

The muffle space 20 is formed by the edge 11, the first chamber of the heat .10-carrier 6 and the shell 2. The muffle-: ko.e space 21 is formed by the heat transfer chamber 6 and the chamber 2, the modules are installed on 1 & pore 22 racks 1.

The case of the furnace and the chamber of tesht & carry- L are made of heat-resistant steel.

The furnace works as follows.

Magnesium nitrate melt (containing 23% MgO), evaporated to 220-130C, is fed through pipe 16 in Krush 11 to the muffled space to on the heated layer of powdered magnesium oxide oxide, previously laid through the hatch of the grill (not rolled) on upper chamber arch heat5

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magnesium soda is removed from the furnace through nozzle 17.

Flue gases with a temperature are used as a coolant, the gases are conducted through the nozzles 7, and the viewport from the chamber of the coolant.

The repair is carried out by replacing the outdated module with a spare one. To do this, remove the cover 11, remove the module from the supports 22, then the supports 22 detach from the pillars I and pull out the module to be repaired.

The proposed solution allows: to process the material obtained by modern methods of chemical enrichment; receive high frequency material; reduce fuel consumption; improve maintainability; reduce the weight of the furnace and the load on the foundation; use nitrous gases without purification for the regeneration of nitric acid.

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Claims (1)

Formula invented and Mnogopodov vertical muffel-on furnace, comprising a casing, insulated chambers of the coolant, centr1449812- A rotary rotary shaft having a row forms a furnace body, with ki with blades protruding into the muffle — each module is transformed from a thermal space formed by a camely shell with outer corners of the heat carrier and the furnace body matte supported by supports pillars, and characterized by the fact that the inner annular flange and chambers in order to maintain a maintainable heat carrier, based on the arch on them due to the expansion of the furnace from the modular ring flange of the shell, while lei, it is equipped with supporting struts of the housing and chambers The heat transfer media is in place with supports, the lateral surface of the module is made of heat-resistant steel.