CN211780988U - Waste heat boiler system of Osmant smelting furnace - Google Patents

Abstract

The utility model relates to an Oumeite smelting furnace exhaust-heat boiler system, which comprises four parts of a smelting furnace cover, an ascending flue, a descending flue and a convection zone which is horizontally arranged, wherein water-cooled walls on the front, the back, the left and the right sides of a radiation chamber are all set to be vertical from top to bottom, an ash pipe is straight-through from top to bottom and is matched with the cross section shape of the radiation chamber, and the upper end of the water-cooled wall on the rear side wall surface of the radiation chamber and the upper end of the water-cooled wall on the front side wall of the convection zone are all clung to a top guard plate which is obliquely; the utility model provides a collapse the problem that burnt bad cold ash fill and radiation chamber water-cooling wall because of exhaust-heat boiler top, eliminated because of cold ash fill grizzly is blockked up by the burnt piece, forced blowing out, subtract the material, need constantly organize the current situation that a large amount of manpowers, material resources are coke-cleaned, improved the system of smelting furnace and opened the wind the time rate.

Description

Waste heat boiler system of Osmant smelting furnace

Technical Field

The utility model belongs to the technical field of copper pyrometallurgical treatment equipment technique and specifically relates to an Osmant smelting furnace exhaust-heat boiler system.

Background

The waste heat boiler of the Osmant furnace in the present smelting plant adopts a straight-through forced circulation boiler, the model of the waste heat boiler is QCF 124/1230-110-4.6, the waste heat boiler mainly comprises four parts of a smelting furnace cover, an ascending flue, a descending flue and a convection zone which are horizontally arranged, flexible expansion joints are arranged at a joint of a water screen of the waste heat boiler and the smelting furnace cover, a joint of the descending flue and the convection zone and an outlet part of the waste heat boiler, and 160 groups of spring vibration hammer devices are arranged on the ascending flue, the descending flue and the convection tube bundle of the waste heat boiler together to remove the accumulated dust on a heating surface and the convection tube bundle. The scraper conveyor is arranged on the lower portion of the ash bucket of the convection area of the waste heat boiler, the ash in the ash bucket of the boiler is conveyed to the ash room by the scraper conveyor, and the ash in the ash room is regularly cleaned manually. The lower part of the descending flue is provided with an ash bucket, the ash bucket is provided with a grid so as to prevent the large coke blocks from directly entering the ash discharge pipe to be blocked, and the large coke blocks are manually cleared from a manhole door of the grid of the ash cooling bucket.

As shown in the attached drawing, in the actual production operation, the height drop of the descending flue is 38.5 meters, because the coking at the top is serious, large coke blocks fall down from time to time, the cold ash bucket is broken down, the sealed flap valve and the ash discharge pipe are blocked, and meanwhile, the situation that the whole smelting system is overhauled in advance because the cold ash bucket is broken down by the coke blocks also happens, the air blowing rate of the Ordovician furnace is influenced, the safe and economic operation of smelting production is severely restricted, and unnecessary furnace shutdown and a large number of overhaul periods are caused.

Disclosure of Invention

The utility model aims at the aforesaid condition, provide an Oumei smelting furnace exhaust-heat boiler system, the utility model provides an because of the exhaust-heat boiler top collapses burnt problem of smashing bad cold ash bucket and radiation chamber water-cooled wall, eliminated because of cold ash bucket grizzly is blockked up by the burnt piece, forced blowing out, subtract the material, need constantly organize the current situation that a large amount of manpowers, material resources coke cleaning, improved the system of smelting furnace and opened the wind time rate.

The utility model has the following concrete scheme: an Oersmott smelting furnace waste heat boiler system comprises four parts of a smelting furnace cover, an ascending flue, a descending flue and a convection zone which is horizontally arranged, wherein the lower part of the descending flue is a radiation chamber, the front side wall of the convection zone and the front side wall of the radiation chamber are all water-cooled walls, the water-cooled wall of the rear side wall of the radiation chamber and the water-cooled wall of the front side wall of the convection zone are arranged back to back, the lower end outlet of the radiation chamber is connected to an ash room through an ash pipe, the ash pipe is connected with the lower end outlet of the radiation chamber through an expansion joint, a slag condensation tube panel A, a slag condensation tube panel B and a plurality of convection tube bundles are sequentially arranged in the convection zone, the tail end of the convection zone is provided with a flue gas outlet, a scraper machine is arranged under the slag condensation tube panel A, the slag condensation tube panel B and all the convection tube bundles in the convection zone, the outlet end of the scraper, the water-cooled walls on the front, the rear, the left and the right of the radiation chamber are all arranged in a vertical form from top to bottom, the ash pipe is in a straight-through type from top to bottom and is matched with the section shape of the radiation chamber, and the upper end head of the water-cooled wall on the rear side wall of the radiation chamber and the upper end head of the water-cooled wall on the front side wall of the convection zone are both tightly attached with obliquely arranged top guard plates.

Further, in the utility model discloses in the position sets to the slope swift current wall under the water-cooled wall that is located radiation room rear side wall on the ash pipe, and the contained angle between the inclined plane of this slope swift current wall and the vertical face is 9.5 ︒.

Further, in the utility model discloses in the gate in ash room adopts cigarette ash sealing door, and cigarette ash sealing door adopts the stainless steel door plant and seals for high temperature resistant rubber sealing strip all around, cigarette ash sealing door lift drive goes up and down in order to realize the switch operation.

Further, in the utility model discloses in it buries the trigger of scraping for the tow chain to scrape the trigger.

Further, in the utility model discloses in the bottom of convection current district is rectangular awl fill structural style to form the butt joint with scraping the trigger.

The utility model discloses a reform transform and accomplish the back, the smelting furnace full load operating duration increases greatly, the water-cooled wall, it is normal to scrape trigger operation, cold ash fill and cigarette ash sealing door are sealed good, thoroughly solved cold ash fill because of the exhaust-heat boiler top collapses burnt phenomenon of pounding bad cold ash fill and radiation chamber water-cooled wall, very big elimination is blocked up by the coke button because of former cold ash fill grizzly, forced blowing out, subtract the material, need organize a large amount of manpowers from time to time, the phenomenon of material resources decoking, the system of smelting furnace rate of blowing in time has been improved, for the steady of enterprise, safety, high efficiency operation production, guarantee is provided.

Drawings

FIG. 1 is a schematic diagram of a conventional exhaust heat boiler flue gas treatment system;

fig. 2 is a schematic diagram of the overall structure of the present invention;

fig. 3 is a schematic diagram of the structure at K in fig. 2.

In the figure: 1-ash bucket, 2-the water-cooled wall of the rear wall of the existing exhaust-heat boiler radiation chamber, 3-smelting furnace, 4-smelting furnace bell, 5-uptake, 6-descending flue, 7-rapping spring hammer, 8-slag-condensing tube panel A, 9-slag-condensing tube panel B, 10-convection bank, 11-exhanst gas outlet, 12-convection zone, 13-scraper, 14-ash room, 15-cigarette ash sealing door, 16-ash tube, 17-slope swift current wall, 18-the utility model discloses the water-cooled wall of the rear wall of the middle radiation chamber, 19-top backplate, 20-expansion joint, 21-the water-cooled wall of the front wall of convection zone.

Detailed Description

Referring to fig. 2 and 3, the utility model relates to an Owmite smelting furnace exhaust-heat boiler system, which comprises a smelting furnace cover 4, an uptake 5, a descent 6 and a convection zone 12 arranged horizontally, the lower part of the descent is a radiation chamber, the front walls of the radiation chamber and the front walls of the radiation chamber are all water-cooled walls, the water-cooled wall 18 of the rear wall of the radiation chamber and the water-cooled wall 21 of the front wall of the convection zone are arranged back to back, the lower outlet of the radiation chamber is connected to an ash room 14 through an ash pipe 16, the ash pipe is connected with the lower outlet of the radiation chamber through an expansion joint 20, a slag condensation tube panel A8, a slag condensation tube panel B9 and a plurality of convection tubes 10 are arranged in the convection zone in sequence, the tail end of the convection zone is provided with a flue gas outlet 11, a scraper 13 is arranged under the slag condensation tube panel A, the slag condensation tube panel B and all the convection tubes in the convection zone, the outlet end of the scraper conveyor is communicated with an ash room, a plurality of groups of rapping spring hammers 7 are arranged on the ascending flue, the descending flue and the convection tube bundle, the water-cooled walls on the front, the rear, the left and the right sides of the radiation chamber are all arranged in a vertical form from top to bottom, the ash tube is in a straight-through form from top to bottom and is matched with the cross section shape of the radiation chamber, and the upper end head of the water-cooled wall on the rear side wall of the radiation chamber and the upper end head of the water-cooled wall on the front side wall of the convection area are both tightly attached with obliquely arranged top guard plates 19 for protecting the water-cooled wall on the rear side wall of.

Further, in the embodiment, the part of the ash pipe, which is positioned right below the water-cooled wall of the rear wall surface of the radiation chamber, is provided with the inclined chute wall 17, and the included angle between the inclined surface and the vertical surface of the inclined chute wall is 9.5 ︒.

Further, the gate in this embodiment grey room adopts cigarette ash sealing door 15, and cigarette ash sealing door adopts the stainless steel door plant and seals for high temperature resistant rubber sealing strip all around, cigarette ash sealing door lift drive goes up and down in order to realize switch operation.

Further, in this embodiment, the scraper is a drag chain type buried scraper.

Further, the bottom of convection zone is rectangular awl fill structural style in this embodiment to form the butt joint with the scraper.

The utility model discloses it is like when carrying out actual implementation: the water-cooled wall of the rear wall of the radiation chamber is straightened and contracted to 1500mm, the water-cooled walls on the other three surfaces of the original radiation chamber are equal to the water-cooled wall, and the lower part of the water-cooled wall is provided with a sealing expansion joint; at the joint of the water-cooled wall of the rear wall of the radiation chamber and the water-cooled wall of the front wall of the convection zone, a front inclined angle of 8 degrees is still required to be reserved during actual construction, the vertical height of the slope is 300 mm, the box body at the head end of the scraper conveyor is avoided, and meanwhile, a welding space of the water-cooled wall is reserved; the original cold ash bucket is eliminated, and the original ash pipe 600 x 600mm is directly changed into an ash pipe 4400 x 4000mm and communicated with an ash room; the original sealing flap valve is cancelled; the waste heat boiler scraper machine is shortened by 1080mm, the No. 1 box body is shortened by 350mm, the head wheel box body is shortened by 750mm, the speed reducer and the motor are moved from the top of the head wheel box body to the side of the No. 1 box body for installation, and a speed reducer support is welded on the No. 1 box body (actual adjustment is performed by limitation of installation space);

after the construction transformation is carried out, the membrane water wall of the radiation chamber is reduced by 15.21 square meters, the direct heating space of the original radiation chamber is increased by about 1.5 square meters, the thermodynamic calculation of the waste heat boiler and the thermal efficiency calculation of the boiler are checked, the design smoke temperature of the radiation chamber is 750 ℃, but the radiation chamber of the waste heat boiler mainly has the function of coke cleaning of a cold ash bucket of an ash pipe, the smoke of the waste heat boiler directly enters a convection zone from the upper part of the cold ash bucket, the thermodynamic calculation in the design does not consider the area of the smoke, so the transformation does not influence the evaporation capacity of the waste heat boiler, but the influence of the thermal radiation of the high-temperature smoke on a lower ash pipe in the design must be considered, so that the lower ash pipe is manufactured in three sections in the specific construction, the size of the first section of the ash pipe connected with the radiation chamber is 4750 2856.5, the material is 20g, and the second section is manufactured: front wall 4750 x 5296 x 20, back wall 4750 x 5296 x 20, left and right side walls 4790 x 3092 x 20, material Q235-a, third section: front wall 4750 × 3092 × 20, rear wall 4750 × 3092 × 20, left and right side walls 4790 × 3092 × 20, material Q235-a; when the device is assembled on site, the flange part is sealed by an asbestos tape with the thickness of 10mm, and the bolt is an 8.8-level high-strength bolt. Each section is fixed by a steel beam.

And (5) rebuilding the ash house, and installing an ash sealing door. Specification of the ash sealing door: 4000 x 3500mm, main material: 316L stainless steel, the sealing strip is sealed by heat-resistant rubber which can resist the temperature of more than 300 ℃, and the periphery of the door is provided with rubber sealing strips. The gate is a single steel structure sealed door, and the opening direction is determined according to actual conditions. The lifting hinge and the locking device can realize lifting and translation of the door leaf, so that the door is sealed, the door is easy and convenient to open, the door can be opened by 250N, and the lifting and locking device needs 400N.

Claims (5)

1. An Oersmott smelting furnace waste heat boiler system comprises four parts of a smelting furnace cover, an ascending flue, a descending flue and a convection zone which is horizontally arranged, wherein the lower part of the descending flue is a radiation chamber, the front side wall of the convection zone and the front side wall of the radiation chamber are all water-cooled walls, the water-cooled wall of the rear side wall of the radiation chamber and the water-cooled wall of the front side wall of the convection zone are arranged back to back, the lower end outlet of the radiation chamber is connected to an ash room through an ash pipe, the ash pipe is connected with the lower end outlet of the radiation chamber through an expansion joint, a slag condensation tube panel A, a slag condensation tube panel B and a plurality of convection tube bundles are sequentially arranged in the convection zone, the tail end of the convection zone is provided with a flue gas outlet, a scraper machine is arranged under the slag condensation tube panel A, the slag condensation tube panel B and all the convection tube bundles in the convection zone, the outlet end of the scraper, the method is characterized in that: the water-cooled walls on the front, the rear, the left and the right of the radiation chamber are all arranged in a vertical form from top to bottom, the ash pipe is in a straight-through type from top to bottom and is matched with the section shape of the radiation chamber, and the upper end head of the water-cooled wall on the rear side wall of the radiation chamber and the upper end head of the water-cooled wall on the front side wall of the convection zone are both tightly attached with obliquely arranged top guard plates.

2. An ostomate smelting furnace waste heat boiler system according to claim 1, characterized in that: and the part of the ash pipe, which is positioned right below the water-cooled wall of the rear wall surface of the radiation chamber, is an inclined slide wall, and the included angle between the inclined surface and the vertical surface of the inclined slide wall is 9.5 ︒.

3. An ostomate smelting furnace waste heat boiler system according to claim 1, characterized in that: the door of the ash room is provided with an ash sealing door, the ash sealing door is provided with a stainless steel door plate, the periphery of the ash sealing door is sealed by a high-temperature-resistant rubber sealing strip, and the ash sealing door is driven to lift to realize the opening and closing operation.

4. An ostomate smelting furnace waste heat boiler system according to claim 1, characterized in that: the scraper is a drag chain type buried scraper.

5. An ostomate smelting furnace waste heat boiler system according to claim 1, characterized in that: the bottom of convection zone is rectangular awl fill structural style to form the butt joint with scraping trigger.

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