CN203132368U

CN203132368U - Efficient waste heat recovery device for aluminum melting furnace

Info

Publication number: CN203132368U
Application number: CN2013201284853U
Authority: CN
Inventors: 兰继潘
Original assignee: JIANGXI JINJIN KILN TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: JIANGXI JINJIN KILN TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2013-03-21
Filing date: 2013-03-21
Publication date: 2013-08-14
Anticipated expiration: 2023-03-21

Abstract

An efficient waste heat recovery device for an aluminum melting furnace comprises a furnace body, an outer heat preservation layer, isolation layers, exhaust passages and an air supply system, wherein the isolation layers are arranged outside the furnace body, and exhaust ports are arranged on the isolation layers; the outer heat preservation layer is arranged outside the isolation layers, and an exhaust port are arranged on the outer heat preservation layer; an exhaust port of the melting furnace, the exhaust ports of the isolation layers, the exhaust port of the outer heat preservation layer, and a first exhaust passage and a third exhaust passage which are clamped between one isolation layer and the furnace body and between the furnace body and the outer heat preservation layer form a circuitous exhaust passage; the air supply system comprises air pipes and an air blower, the air pipes are arranged in the isolation layers, air inlets of the air pipes are communicated with the air, and air outlets are connected with an auxiliary heating device of the aluminum melting furnace through the air blower. With the adoption of the technical scheme, the temperature of discharged waste gas can be reduced, the influence on the surrounding can be reduced, waste heat in the waste gas can be fully utilized simultaneously, and energy conservation can be realized.

Description

The efficient waste-heat recovery device of molten aluminium stove

Technical field

The utility model relates to the kiln field, is specially a kind of efficient waste-heat recovery device of molten aluminium stove.

Background technology

The high-temperature flue gas that produces in the general smelting non-ferrous metal process is all directly discharged to carrying out exhaust-gas treatment in the exhaust-gas treatment facilities, a large amount of heat that in waste gas treatment process, will scatter and disappear, and not only contaminated environment and destroy the ecological balance also causes a large amount of energy wastes; And the exhaust-gas treatment facilities of its use need have reasonable heat resistance, will cause cost to increase undoubtedly, and equipment is also relatively more expensive; In addition, present molten aluminium furnace outer wall heat-insulating property is poor, and a large amount of heats are scattered and disappeared away by outer wall, cause the waste of resource.

The utility model content

The technical problem that the utility model solves is to provide a kind of efficient waste-heat recovery device of molten aluminium stove, to solve the problem in the background technology.

The technical problem that the utility model solves realizes by the following technical solutions:

The efficient waste-heat recovery device of molten aluminium stove comprises body of heater, external thermal insulation, separation layer, exhaust passage and supply air system; The outside of described body of heater arranges separation layer, and described separation layer arranges exhaust outlet, and the outside of separation layer arranges external thermal insulation, and described external thermal insulation also is provided with exhaust outlet; First exhaust passage, the 3rd exhaust passage folded between the exhaust outlet of described molten aluminium stove, separation layer exhaust outlet, external thermal insulation exhaust outlet and separation layer and body of heater and the external thermal insulation constitute circuitous reciprocal exhaust passage; Described supply air system comprises airduct and air blast, and described airduct is arranged in the separation layer, and the air inlet of airduct is communicated with atmosphere, and air outlet connects the assisted heating device of molten aluminium stove by air blast.

Described separation layer comprises first separation layer and second separation layer, leaves second exhaust passage between described first separation layer and second separation layer, and it is opposite that first exhaust outlet of described first separation layer and second exhaust outlet of second separation layer arrange direction.

Described body of heater outside also is laid with the protective layer of inorganic material, is doped with conductive particles in the described protective layer.

Beneficial effect:

After the utility model adopts above-mentioned technical scheme, can reduce the temperature of toxic emission, reduce the influence to surrounding environment, can also take full advantage of the waste heat in the waste gas simultaneously, energy savings.

Description of drawings

Fig. 1 is that the master of the efficient waste-heat recovery device of the molten aluminium stove of the utility model looks cross-sectional schematic;

Fig. 2 is that the utility model adopts the master of double-deck separation layer to look cross-sectional schematic;

Fig. 3 is the schematic diagram of supply air system 50 described in the utility model.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in figures 1 and 3, the efficient waste-heat recovery device of molten aluminium stove comprises body of heater 10, external thermal insulation 20, separation layer 30, exhaust passage 40 and supply air system 50; The outside of described body of heater 10 arranges separation layer 30, and described separation layer 30 arranges exhaust outlet 31, and the outside of separation layer 30 arranges external thermal insulation 20, and described external thermal insulation 20 also is provided with exhaust outlet 21; First exhaust passage 41, the 3rd exhaust passage 43 folded between the exhaust outlet 11 of described molten aluminium stove, separation layer exhaust outlet 31, external thermal insulation exhaust outlet 21 and separation layer 30 and body of heater 10 and the external thermal insulation 20 constitute circuitous reciprocal exhaust passage 40; Described supply air system 50 comprises the air blast 52 that major part is arranged at the airduct 51 in the separation layer 30 and is used for gas circulation, the air inlet of described airduct 51 is communicated with atmosphere, air outlet connects the assisted heating device that melts the aluminium stove by air blast 52, and described assisted heating device is arranged at the air inlet pipe place of molten aluminium stove or preheating place of the preceding material of melting.The utility model changes original open exhaust mode into the mode of closed exhaust, with separation layer 30 and external thermal insulation 20 original exhaust outlet is sealed, make waste gas in the process of discharging, must be through the exhaust passage 40 between body of heater 10, separation layer 30 and the external thermal insulation 20, in above-mentioned exhaust passage 40, install heat exchange coil additional then, heat in the waste gas is remained, be used for adding the air inlet of thermal material or molten aluminium stove, can reduce energy consumption, and reduce the influence to environment.Waste gas in the body of heater 10, at first be expelled to first exhaust passage 41 between separation layer 30 and the body of heater 10 through the exhaust outlet 11 of superfusion aluminium stove, in described first exhaust passage 41, waste heat passed to the airduct 51 in the separation layer 30, by the GAS ABSORPTION heat in the airduct 51; Waste gas drains in the 3rd exhaust passage 43 through separation layer exhaust outlet 31 afterwards, carries out heat exchange again, discharges finally by crossing external thermal insulation exhaust outlet 21.In above-mentioned exhaust process, in the waste gas entrained heat fully and the cold air in the airduct 51 carry out heat exchange, not only can reduce the delivery temperature of waste gas, alleviate the influence to environment, do not need very high heat resistance for exhaust-gas treatment facilities yet, reduced cost.And the waste heat in the waste gas also can be fully utilized, and reduces the consumption of the energy.

As shown in Figure 2, described separation layer 30 comprises first separation layer 32 and second separation layer 33, leave second exhaust passage 42 between described first separation layer 32 and second separation layer 33, it is opposite that first exhaust outlet 311 of described first separation layer 32 and second exhaust outlet 312 of second separation layer 33 arrange direction.The purpose that increases separation layer 30 is in order to improve the effect of heat exchange, to utilize the waste heat of waste gas as much as possible.

Described body of heater 10 outsides also are laid with the protective layer 12 of inorganic material, are doped with conductive particles 13 in the described protective layer 12.The utility model lays protective layer 12 at body of heater 10 outer surfaces, can protect body of heater 10, avoids waste gas that corrosion and the body of heater 10 of body of heater 10 are produced oxidation, increases the service life.In protective layer 12, add conductive particles, can improve heat-conducting effect, if adopt metal particle, can also increase the shock resistance of protective layer 12.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry answers described understanding; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. melt the efficient waste-heat recovery device of aluminium stove, comprise body of heater, external thermal insulation, separation layer, exhaust passage and supply air system, it is characterized in that, the outside of described body of heater arranges separation layer, described separation layer arranges exhaust outlet, the outside of separation layer arranges external thermal insulation, and described external thermal insulation also is provided with exhaust outlet; First exhaust passage, the 3rd exhaust passage folded between the exhaust outlet of described molten aluminium stove, separation layer exhaust outlet, external thermal insulation exhaust outlet and separation layer and body of heater and the external thermal insulation constitute circuitous reciprocal exhaust passage; Described supply air system comprises airduct and air blast; described airduct is arranged in the separation layer; the air inlet of airduct is communicated with atmosphere; air outlet connects the assisted heating device of molten aluminium stove by air blast; described separation layer comprises first separation layer and second separation layer; leave second exhaust passage between described first separation layer and second separation layer, described body of heater outside also is laid with the protective layer of inorganic material, is doped with conductive particles in the described protective layer.