CN212205694U - Heat exchange dust removal device of fused magnesia furnace - Google Patents

Abstract

The utility model relates to a heat exchange and dust removal device of an electric smelting magnesia furnace, which comprises a fusion lump heat exchange air inlet unit, a storage tank heat exchange unit and a dust removal unit, wherein the fusion lump heat exchange air inlet unit comprises a fusion lump cylinder, an ascending pipe and a collector; the storage tank heat exchange unit comprises a storage tank and a discharge air outlet element; the dust removal unit comprises an induced draft fan and a bag-type dust remover. The utility model discloses make full use of melts self heat energy that sticks together realizes that the material preheats, shortens the electric smelting time, improves electric smelting efficiency to carry out resource recovery to melting a large amount of powder in the sand coat surface that sticks together, realize energy utilization, energy consumption reduction and resource recovery's purpose on the whole.

Description

Heat exchange dust removal device of fused magnesia furnace

Technical Field

The utility model belongs to the technical field of magnesian high temperature material technique and specifically relates to a heat transfer dust collector of fused magnesia stove.

Background

The electric fused magnesia furnace is a main device for producing electric fused magnesia, and the electric fused magnesia furnace widely applied adopts a three-phase electrode to heat magnesite ore or a ball pressing material, so that the magnesite ore or the ball pressing material is melted to form an electric fused magnesia fused weight, and then the electric fused magnesia fused weight is naturally cooled, and a blocky electric fused magnesia raw material is obtained through processes of mechanical crushing, manual weight sticking, manual sorting and the like.

In the production process of fused magnesia, fused weight cooling belongs to natural cooling, heat waste is serious, and a large amount of powder (active magnesium oxide) on the surface of fused weight skin sand floats in the air in the process of smashing fused weight, so that resource waste is caused, and the working environment of workers in a sorting workshop is influenced.

At present, a plurality of ways for utilizing the heat of the fused weight, such as utilizing the fused weight to dissipate heat to heat cold water, are available in the industry for heating or bathing. Some enterprises also seal crushing workshops in a sealing mode, collect powder floating in the air in a natural settling mode, and recycle the powder in a manual or mechanical sweeping mode. However, the above methods have problems of low heat utilization rate, low recovery rate, and the like.

The fused magnesium fused weight has long natural cooling time and high temperature, and can be regarded as an ideal thermal energy source. The method is characterized in that magnesite ore or pressed ball materials required by electric melting are preheated in advance and subjected to constant heat preservation by utilizing the self heat of the full melting lump, then the preheated magnesite ore or pressed ball materials are put into an electric melting magnesium furnace to produce electric melting magnesium when needed, the electric melting time is shortened, the electric melting efficiency is improved, and meanwhile, a large amount of powder (active magnesium oxide) on the surface of the melting lump sand is recycled, and no relevant device is reported in the industry at present.

Disclosure of Invention

In order to realize the purpose, the utility model provides an energy-conserving, environmental protection, low energy consumption's electric smelting magnesia stove heat transfer dust collector.

The utility model adopts the following technical scheme:

a heat exchange dust removal device of an electric smelting magnesia furnace is characterized by comprising a smelting lump cylinder, an ascending pipe, a storage tank, a collector, a discharging and air outlet element, an induced draft fan and a bag-type dust remover; the device comprises a fused weight barrel, an ascending pipe and a collector, wherein the fused weight barrel, the ascending pipe and the collector form a fused weight heat exchange air inlet unit; storage tank and ejection of compact give vent to anger the component and constitute storage tank heat exchange unit, the ejection of compact is given vent to anger the component and is included: the discharge port at the bottom end of the storage tank is connected with a discharge outlet element, and the discharge port of the discharge outlet element is sequentially connected with the discharge port gate and the chute from top to bottom; the induced draft fan and the bag-type dust remover form a dust removal unit, an air inlet of the induced draft fan is communicated with an air outlet, and an air outlet of the induced draft fan is communicated with the bag-type dust remover.

The bag-type dust collector is a 3kw vibration type pulse bag-type dust collector.

Compared with the prior art, the beneficial effects of the utility model are that: 1) the heat of the fused weight is used as a heat source, cold air is subjected to heat exchange to form hot air, and energy recycling is realized; 2) the raw materials in the material storage tank are subjected to heat exchange by utilizing heat exchange hot air and are kept warm and constant, so that the raw materials are preheated, the electric melting time is shortened, the electric melting efficiency is improved, and the electric energy consumption is reduced; 3) and (3) utilizing a collector and cloth bag dust removal equipment to recover a large amount of powder (active magnesium oxide) on the surface of the fused weight sand, thereby realizing resource recycling.

Drawings

Fig. 1 is the embodiment of the utility model provides an electric smelting magnesia stove heat transfer dust collector schematic structure.

Fig. 2 is a schematic structural view of a discharge outlet element according to an embodiment of the present invention.

In the figure: 1-a cold air inlet, 2-a fused weight cylinder, 3-an ascending pipe, 4-a material storage tank, 5-a collector, 6-a discharging and air outlet element, 7-an induced draft fan, 8-a bag-type dust collector, 61-a discharging port, 62-an air outlet, 63-a discharging port gate and 64-a chute.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an embodiment of a heat exchange and dust removal device of an electric smelting magnesia furnace designed by the utility model, and the device comprises a fused lump cylinder 2, an ascending pipe 3, a storage tank 4, a collector 5, a discharge gas outlet element 6, an induced draft fan 7 and a bag-type dust remover 8; the fused mass heat exchange air inlet unit is composed of a fused mass cylinder 2, an ascending pipe 3 and a collector 5, a cold air inlet 1 is arranged below the left side wall of the fused mass cylinder 2, the air inlet end of the cold air inlet 1 is communicated with the outside air, the air outlet end of the cold air inlet is communicated with the fused mass cylinder 2, the upper part of the right side wall of the fused mass cylinder 2 is communicated with a feed inlet of the collector 5, the feed inlet of the ascending pipe 3 is communicated with a discharge port at the top end of the collector 5, and the discharge port of the ascending pipe 3 is communicated with a feed inlet right; storage tank 4 and ejection of compact give vent to anger component 6 and constitute storage tank heat exchange unit, and ejection of compact gives vent to anger component 6 and includes: the discharge port 61, the gas outlet 62, the discharge port gate 63 and the chute 64, the discharge port at the bottom end of the storage tank 4 is connected with the discharge gas outlet element 6, and the discharge port 61 of the discharge gas outlet element 6 is sequentially connected with the discharge port gate 63 and the chute 64 from top to bottom; the induced draft fan 7 and the bag-type dust collector 8 form a dust collection unit, the air inlet of the induced draft fan 7 is communicated with the air outlet 62, and the air outlet of the induced draft fan 7 is communicated with the bag-type dust collector 8.

The bag-type dust collector 8 is a 3kw vibration type pulse bag-type dust collector.

The utility model relates to an operation mode of heat exchange dust collector of fused magnesia furnace:

1) switching the discharging and gas outlet element 6 to a discharge port 61, closing a discharge port gate 63, filling ore or ball pressing material into the storage tank 4 through a feed port above the side of the storage tank 4, closing the feed port above the side of the storage tank 4, and switching the discharging and gas outlet element 6 to a gas outlet 62;

2) starting an induced draft fan 7, introducing cold air into the fused weight cylinder 2 through a cold air inlet 1, and performing heat exchange on the cold air through the fused weight to form hot air;

3) hot air and small particle dust enter a material storage tank 4 at the upper part of the fused magnesia furnace through an ascending pipe 3, and large particle materials in the hot air enter a collector 5 downwards along the inner wall of the ascending pipe 3 and are discharged periodically;

4) the hot air and the small particle dust exchange heat with the ore or the pressed ball material in the material storage tank 4 and pass through the discharging and air outlet element 6;

5) according to the temperature value detected by a thermocouple on the cold air pipeline, partial cold air is distributed into the induced draft fan 7, and the air and the residual small-particle dust enter the bag-type dust remover 8;

6) after the temperature of the ores and the ball pressing materials in the material storage tank 4 reaches the designated temperature, the induced draft fan 7 is closed, the discharging air outlet element 6 is switched to the discharging port 61, and the discharging port gate 63 is closed;

7) replacing another set of storage tank heat exchange unit, and repeating the steps 2-6;

8) when the electric melting furnace starts to work, a discharge port gate 63 on the gas outlet discharge element 6 is opened at the same time, and materials enter the electric melting furnace through a chute 64 below the discharge port 61 to carry out production of fused magnesia;

the electric energy consumption in the production process of the fused magnesium is reduced by about 10.7 percent through accounting.

Claims (2)

1. The heat exchange and dust removal device for the electric smelting magnesia furnace is characterized by comprising a smelting lump cylinder (2), a rising pipe (3), a storage tank (4), a collector (5), a discharging and gas outlet element (6), an induced draft fan (7) and a bag-type dust remover (8); the fused mass heat exchange air inlet unit is composed of a fused mass cylinder (2), an ascending pipe (3) and a collector (5), a cold air inlet (1) is arranged below the left side wall of the fused mass cylinder (2), the air inlet end of the cold air inlet (1) is communicated with the outside air, the air outlet end of the cold air inlet is communicated with the fused mass cylinder (2), the upper part of the right side wall of the fused mass cylinder (2) is communicated with the feed inlet of the collector (5), the feed inlet of the ascending pipe (3) is communicated with the discharge outlet at the top end of the collector (5), and the discharge outlet of the ascending pipe (3) is communicated with the feed inlet right above the top end of a storage;

storage tank heat exchange unit is constituteed with ejection of compact play gas component (6) in storage tank (4), ejection of compact play gas component (6) include: the device comprises a discharge port (61), an air outlet (62), a discharge port gate (63) and a chute (64), wherein the discharge port at the bottom end of a storage tank (4) is connected with a discharge air outlet element (6), and the discharge port (61) of the discharge air outlet element (6) is sequentially connected with the discharge port gate (63) and the chute (64) from top to bottom;

the dust removal unit is composed of the induced draft fan (7) and the bag-type dust remover (8), the air inlet of the induced draft fan (7) is communicated with the air outlet (62), and the air outlet of the induced draft fan (7) is communicated with the bag-type dust remover (8).

2. The heat exchange and dust removal device for the fused magnesia furnace according to claim 1, wherein the bag-type dust remover (8) is a 3kw vibration type pulse bag-type dust remover.

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