CN216845660U

CN216845660U - Novel multi-fuel high-temperature flue gas fluidized bed furnace

Info

Publication number: CN216845660U
Application number: CN202220125280.9U
Authority: CN
Inventors: 职冬晖
Original assignee: Hubei Tianxin Thermal Energy Equipment Co ltd
Current assignee: Hubei Tianxin Thermal Energy Equipment Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-06-28
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to a vulcanize calcination technical field, and disclose a novel many fuel high temperature flue gas fluidized bed furnace, which comprises a bracket, the furnace body is installed to the top of support, the top of furnace body is provided with the explosion-proof hole, the gas outlet has been seted up on the right side of furnace body, the bottom of furnace body is connected with the air inlet chamber, first air intake has been seted up in the left side of air inlet chamber. This novel many fuel high temperature flue gas fluidized bed furnace, set up the structure that the suitable for reading is less than the end opening through the gas pocket with air distribution plate, can produce the atmospheric pressure difference on air distribution plate's upper and lower both sides, promote the air admission combustion chamber, and through setting up the arc top cap above the gas pocket, make the air flow out from the gap between top cap and the gas pocket, the smoke and dust that can avoid the calcination in-process to produce gets into the gas pocket, prevent that the gas pocket is stopped up to the smoke and dust and cause the phenomenon that the stove burns inadequately, prolong air distribution plate's life, improve the work efficiency of fluidized bed furnace.

Description

Novel multi-fuel high-temperature flue gas fluidized bed furnace

Technical Field

The utility model relates to a vulcanize calcination technical field, specifically be a novel many fuel high temperature flue gas fluidized bed furnace.

Background

A fluidized bed roaster, called fluidized bed roaster for short, is a device for roasting sulfide ore by using a solid fluidization technology, and the roasting process discharges reaction heat to generate gas containing sulfur dioxide which is mainly used for preparing sulfuric acid, and slag is used as a metallurgical raw material.

The furnace body of the fluidized bed roaster is formed by lining heat-insulating bricks on a steel shell and lining refractory bricks, in order to prevent the corrosion of condensed acid, a heat-insulating layer is arranged outside the steel shell, the lowest part of the furnace is an air chamber which is provided with an air inlet pipe, an air distribution plate is arranged on the air inlet pipe, a refractory concrete hearth (collecting molten metal and slag at an air port to expose ores in flame) is arranged on the air distribution plate, a cooling pipe of a waste heat boiler is arranged in the fluidized bed, the furnace body is also provided with a charging port, a slag overflow port, a furnace gas outlet, a secondary air inlet, an ignition port and other connecting pipes, the furnace top is provided with an explosion-proof hole, when the fluidized bed roaster works, an air inlet at the bottom of the device is used for conveying oxygen in the furnace, heat generated by the combustion of coal on the hearth roasts the ores, smoke generated by the ores rises in the furnace body along with the heat and then enters the next working procedure from the outlet to be processed, and air below the fluidized bed enters the furnace body to react through the air distribution plate, along with the enhancement of environmental protection consciousness, the fluidized bed furnace of pure burning coal and can not satisfy sustainable development's requirement to the ore calcination makes the easy accumulation of the smoke and dust that produces cause the jam of air distribution plate hole on air distribution plate, reduces air distribution plate's life-span, and influences the abundant burning of fuel, and the slag that produces after the fluidized bed furnace burning simultaneously remains the piece in the furnace body easily when discharging, influences the follow-up use of fluidized bed furnace, to prior art not enough, the utility model provides a novel many fuel high temperature flue gas fluidized bed furnace.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel many fuel high temperature flue gas fluidized bed furnace to prior art not enough, the problem of proposing in the above-mentioned background art has been solved.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a novel multi-fuel high-temperature flue gas fluidized bed furnace comprises a support, a furnace body is installed above the support, an explosion-proof hole is formed in the top of the furnace body, an air outlet is formed in the right side of the furnace body, an air inlet chamber is connected to the bottom of the furnace body, a first air inlet is formed in the left side of the air inlet chamber, a valve is installed at the left end of the first air inlet, a fan is connected to the right end of the first air inlet, an air distribution plate installed at the bottom of the furnace body is arranged above the air inlet chamber, a fire-resistant concrete hearth installed inside the furnace body is arranged above the air distribution plate, a slag hole formed in the furnace body is formed in the right side of the fire-resistant concrete hearth, an ignition port formed in the furnace body is formed above the slag hole, a feed port formed in the support is arranged above the fire-resistant concrete hearth, and a hood distribution plate connected inside the furnace body is installed above the fire-resistant concrete hearth, and a second air inlet is formed in the left side of the lower part of the furnace body, and the left end of the second air inlet is connected with a pipeline.

Optionally, three baffles perpendicular to the plane of the air distribution plate are connected above the air distribution plate, the combustion chamber portion corresponding to the furnace body is isolated by the baffles, an arc-shaped cap is arranged above the air holes of the air distribution plate, and the upper openings of the air holes of the air distribution plate are smaller than the lower openings.

Optionally, the middle part of the furnace body is an upward-expanding cone, and the positions of three combustion chambers at the lower part of the furnace body, which are isolated by the air distribution plate, are respectively provided with a conversion device for burning solid, gas and liquid fuels, and the three combustion chambers are respectively provided with a corresponding feed inlet, an ignition port and a slag outlet.

Optionally, a valve is arranged at a position where the pipeline is connected with the second air inlet, and the bottom end of the pipeline is communicated with the air outlet of the fan.

Optionally, the refractory concrete hearth is correspondingly disposed in the combustion chambers separated by the three air distribution plates, and a hood is buried in the refractory concrete hearth.

Optionally, the air outlet of the fan is divided into two branch air outlets, and the two branch air outlets are respectively communicated with the pipeline and the first air inlet.

The utility model provides a novel many fuel high temperature flue gas fluidized bed furnace possesses following beneficial effect:

1. this novel many fuel high temperature flue gas fluidized bed furnace, set up the structure that the suitable for reading is less than the end opening through the gas pocket with air distribution plate, can produce the atmospheric pressure difference on air distribution plate's upper and lower both sides, promote the air admission combustion chamber, and through setting up the arc top cap above the gas pocket, make the air flow out from the gap between top cap and the gas pocket, the smoke and dust that can avoid the calcination in-process to produce gets into the gas pocket, prevent that the gas pocket is stopped up to the smoke and dust and cause the phenomenon that the stove burns inadequately, prolong air distribution plate's life, improve the work efficiency of fluidized bed furnace.

2. This novel many fuel high temperature flue gas fluidized bed combustion boiler, through the exit at the fan other switch-on pipeline, and through set up hand valve in second air intake and first air intake department, can control the air-out direction of fan, realize the function through fan air feed and clearance slag in to the stove, divide into the three of relative sealing through air distribution plate with the combustion chamber, and set up feed inlet and ignition door at the corresponding position of support, and the cooperation through corresponding fuel sprayer or air nozzle, can realize the multiple fuel heating of fluidized bed combustion boiler, reduce the pollution of pure coal burning, improve the utilization ratio and the feature of environmental protection of fluidized bed combustion fuel.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic structural view of the air distribution plate shown in FIG. 1 according to the present invention;

fig. 3 is a top view of the air distribution plate of the present invention 1;

fig. 4 is an enlarged schematic structural view of a point a in fig. 1 according to the present invention.

In the figure: 1. a support; 2. a furnace body; 3. an air intake chamber; 4. an air distribution plate; 5. a slag outlet; 6. a refractory concrete hearth; 7. an ignition port; 8. an air outlet; 9. an explosion-proof hole; 10. a hood distribution plate; 11. a feed inlet; 12. a second air inlet; 13. a first air inlet; 14. a fan; 15. a pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the present invention provides a technical solution: a novel multi-fuel high-temperature flue gas fluidized bed furnace comprises a support 1, a furnace body 2 is installed above the support 1, the furnace body 2 is formed by a steel shell lining insulating brick and a refractory brick lining, the middle part of the furnace body 2 is an upwards enlarged cone, the sectional area of an upper part roasting space is larger than that of a boiling layer so as to reduce solid particles to be blown out, conversion devices enabling solid, gas and liquid fuels to be combusted are respectively arranged at the positions of three combustion chambers at the lower part of the furnace body 2 isolated by an air distribution plate 4, and the three combustion chambers are respectively provided with a corresponding feed inlet 11, an ignition port 7 and a slag outlet 5, combustion of three types of various fuels can be realized by isolating the combustion chambers of the fluidized bed furnace into three combustion chambers, pollution caused by single coal is reduced, environment protection is enhanced, the treatment steps of subsequent tail gas can be reduced, the cost is reduced, an explosion-proof hole 9 is arranged at the top part of the furnace body 2, used for stabilizing the air pressure in the furnace body and preventing the furnace body from cracking, the right side of the furnace body 2 is provided with an air outlet 8, the flue gas produced by the fluidized bed furnace is introduced into the next flow structure through the gas outlet 8, the bottom of the furnace body 2 is connected with the gas inlet chamber 3, used for supplying sufficient oxygen to the support 1 and ensuring the combustion efficiency of fuel, the left side of the air inlet chamber 3 is provided with a first air inlet 13, and the left end of the first air inlet 13 is provided with a valve which can seal the first air inlet 13 when the fan 14 acts on the slag to prevent the fan 14 from blowing the slag from two directions, the right end of the first air inlet 13 is connected with the fan 14, the air outlet of the fan 14 is divided into two branch air outlets which are respectively communicated with the pipeline 15 and the first air inlet 13, the output of the wind direction of the fan 14 can be controlled through the matching of the second air inlet 12 and the valve at the first air inlet 13, and an air distribution plate 4 arranged at the bottom of the furnace body 2 is arranged above the air inlet chamber 3.

Referring to fig. 2-3, three baffles perpendicular to the plane of the air distribution plate 4 are connected above the air distribution plate 4, and the baffles isolate the combustion chamber portion corresponding to the furnace body 2 to form a combustion chamber for solid, liquid and gas, and an arc-shaped cap is arranged above the air holes of the air distribution plate 4, so that air enters the furnace body 2 through gaps between the air holes and the cap, and smoke generated during combustion of the fluidized bed furnace enters the air holes of the air distribution plate 4 to block the air holes, thereby reducing the combustion effect of the fuel, prolonging the service life of the air distribution plate 4, and the upper openings of the air holes of the air distribution plate 4 are smaller than the lower openings, so that the air pressure difference generated by the diameter difference of the upper openings and the lower openings of the air distribution plate 4 can achieve the effect of promoting air flow.

Referring to fig. 1 and 4, a refractory concrete hearth 6 installed inside a furnace body 2 is disposed above an air distribution plate 4, the refractory concrete hearth 6 is a roasting space of ores, the ores are subjected to high temperature reaction on the refractory concrete hearth 6 to generate flue gas, the refractory concrete hearth 6 is correspondingly disposed in a combustion chamber partitioned by three air distribution plates 4, and a blast cap is buried in the refractory concrete hearth 6 to facilitate full reaction between air and conradson, a slag outlet 5 opened on the furnace body 2 is disposed on the right side of the refractory concrete hearth 6 to discharge slag, an ignition port 7 on the furnace body 2 is disposed above the slag outlet 5, three ignition ports 7 are disposed corresponding to three fuels, a feed inlet 11 opened on a support 1 is disposed above the refractory concrete hearth 6 to discharge ores, a blast cap distribution plate 10 connected inside the furnace body 2 is disposed above the refractory concrete hearth 6, the effect of even gas distribution can be played, the flue gas that makes the formation has good initial fluidization condition, second air intake 12 has been seted up to the left side of furnace body 2 lower part, second air intake 12 corresponds three kinds of combustion chamber has threely, make the wind of fan 14 blow into the furnace body 2 and make the gathering of remaining slag through the wind of same direction via second air intake 12, make things convenient for the discharge of slag, the left end of second air intake 12 is connected with pipeline 15, pipeline 15 has three branch corresponding to second air intake 12, can bring into the furnace body 2 with the wind that fan 14 produced, the position that pipeline 15 and second air intake 12 are connected is provided with the valve, can prevent that the burner gas from getting into pipeline 15 when the fluidized bed furnace during operation, and the bottom and the fan 14 air outlet intercommunication of pipeline 15.

To sum up, when the novel multi-fuel high-temperature flue gas fluidized bed furnace is used, the valve at the second air inlet 12 is closed, the valve at the first air inlet 13 is opened, the fan 14 is started, the fan 14 conveys air into the air inlet chamber 3 through the first air inlet 13, the air enters the combustion chamber of the fluidized bed furnace through the air distribution plate 4, the fire-resistant concrete hearth 6 is positioned, the fluidized bed furnace is ignited through the ignition port 7 corresponding to the combustion chamber, the coal solid combustion, the gas fuel such as natural gas and the like and the liquid fuel such as gasoline and the like are combusted in the corresponding combustion chamber through the corresponding channel or the filter, the ore enters the furnace body from the corresponding feed inlet 11 in the three combustion chambers and is roasted at high temperature on the fire-resistant concrete hearth 6, the generated flue gas moves to the top of the furnace body along with heat and passes through the uniform action of the air cap distribution plate 10, so that the flue gas has good initial fluidization condition, finally, the slag enters the next process through the air outlet 8, the caps distributed on the holes of the air distribution plate 4 prevent the soot generated during ore roasting from entering the air holes of the air distribution plate 4, meanwhile, the soot is prevented from being accumulated on the caps, after the roasting and sintering are finished, the slag is cleaned, the large-scale slag is discharged out of the furnace body through the slag outlet 5, the valve at the first air inlet 13 is closed, the valve at the second air inlet 12 is opened, the fan 14 is started, the air of the fan 14 is blown into the combustion chamber through the pipeline 15 from the second air inlet 12, the micro-scale slag is accumulated at the slag outlet 5, and the rest slag is cleaned out of the support 1.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel many fuel high temperature flue gas fluidized bed furnaces, includes support (1), its characterized in that: the furnace body (2) is installed above the support (1), an explosion-proof hole (9) is formed in the top of the furnace body (2), an air outlet (8) is formed in the right side of the furnace body (2), an air inlet chamber (3) is connected to the bottom of the furnace body (2), a first air inlet (13) is formed in the left side of the air inlet chamber (3), a valve is installed at the left end of the first air inlet (13), a fan (14) is connected to the right end of the first air inlet (13), an air distribution plate (4) installed at the bottom of the furnace body (2) is arranged above the air inlet chamber (3), a refractory concrete hearth (6) installed inside the furnace body (2) is configured above the air distribution plate (4), a slag outlet (5) formed in the furnace body (2) is formed in the right side of the refractory concrete hearth (6), and an ignition hole (7) in the furnace body (2) is formed above the slag outlet (5), the utility model discloses a fire-resistant concrete furnace bed, including support (1), fire-resistant concrete furnace bed (6), the top of fire-resistant concrete furnace bed (6) disposes feed inlet (11) of seting up on support (1), the hood distributing plate (10) of connection inside furnace body (2) are installed to the top of fire-resistant concrete furnace bed (6), second air intake (12) have been seted up in the left side of furnace body (2) lower part, the left end of second air intake (12) is connected with pipeline (15).

2. The novel multi-fuel high-temperature flue gas fluidized bed furnace of claim 1, characterized in that: the upper part of the air distribution plate (4) is connected with three baffles vertical to the plane of the air distribution plate (4), the baffles isolate the combustion chamber part corresponding to the furnace body (2), an arc-shaped structure cover cap is arranged above the air hole of the air distribution plate (4), and the upper opening of the air hole of the air distribution plate (4) is smaller than the lower opening.

3. The novel multi-fuel high-temperature flue gas fluidized bed furnace of claim 1, characterized in that: the middle part of the furnace body (2) is an upwards-expanding cone, conversion devices for burning solid, gas and liquid fuel are respectively arranged at the positions of three combustion chambers at the lower part of the furnace body (2) isolated by the air distribution plate (4), and the three combustion chambers are respectively provided with a corresponding feed inlet (11), an ignition port (7) and a slag outlet (5).

4. The novel multi-fuel high-temperature flue gas fluidized bed furnace of claim 1, characterized in that: and a valve is arranged at the position where the pipeline (15) is connected with the second air inlet (12), and the bottom end of the pipeline (15) is communicated with the air outlet of the fan (14).

5. The novel multi-fuel high-temperature flue gas fluidized bed furnace of claim 1, characterized in that: the fire-resistant concrete hearth (6) is correspondingly arranged in a combustion chamber separated by the three air distribution plates (4), and a blast cap is buried in the fire-resistant concrete hearth (6).

6. The novel multi-fuel high-temperature flue gas fluidized bed furnace of claim 1, characterized in that: the air outlet of the fan (14) is divided into two branch air outlets which are respectively communicated with the pipeline (15) and the first air inlet (13).