CN214747205U

CN214747205U - Roasting furnace of step heating fluidized bed

Info

Publication number: CN214747205U
Application number: CN202120541697.9U
Authority: CN
Inventors: 万劲松
Original assignee: Kunming Wanheng Technology Co ltd
Current assignee: Kunming Wanheng Technology Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-11-16
Anticipated expiration: 2031-03-16

Abstract

The utility model relates to a fluidized bed roasting furnace, in particular to a step heating fluidized bed roasting furnace, which comprises a roasting furnace and a gas-solid separator, wherein the bottom end of the roasting furnace is provided with an outlet, the inner bottom end of the roasting furnace is provided with an air distribution plate, the top of the air distribution plate is provided with a fluidized bed layer, the top of the fluidized bed layer is sequentially provided with a first combustion chamber, a second combustion chamber and a third combustion chamber from bottom to top, the top end of one side of the roasting furnace is provided with the gas-solid separator, the bottom end of the gas-solid separator is provided with a return pipe in a through way, the gas-solid separator and the third combustion chamber are connected in a through way through an air outlet pipe, the gas-solid separator, the first combustion chamber and the second combustion chamber are connected in a through way through an air return pipe, the whole device of the utility model has simple structure, can carry out low-temperature and high-temperature three-order heating combustion, not only has high combustion efficiency, also saves energy, ensures that the energy consumption is low, and has certain popularization effect.

Description

Roasting furnace of step heating fluidized bed

Technical Field

The utility model relates to a fluidized bed bakes burning furnace, specifically is a step heating fluidized bed bakes burning furnace over a slow fire.

Background

The fluidized bed roasting has the characteristic of high temperature resistance of the fluidized bed, metal oxides such as inorganic salt, cobalt salt, copper and nickel, clay, kaolin, medium kaolin, ceramic and the like are roasted, calcined and dried under the action of a high-temperature heat medium (the temperature of hot air can reach 600 ℃ and the temperature of a particle medium can reach 1200 ℃), one heat source of fluidized drying is high-temperature hot air, the second heat source is ultrahigh-temperature medium ions (sand, metal ions, recoverable particles and the like), and the third heat source is the combination of the two heat sources, because of the adoption of a fluidization principle, the heat medium/material is fully fluidized under the action of hot air and mechanical force, heat and mass exchange is carried out, continuous feeding and discharging are completed under a flowing state (or vibration conveying), and the fluidized roasting has the advantages that the material is fully contacted with the heat source, the product is uniformly heated, the temperature field is uniform, but the conventional fluidized roasting furnace cannot carry out step-by-step combustion, therefore, the energy consumption is high, and the energy is not enough, so that the problem is improved by a step heating fluidized bed roasting furnace.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a step heating fluidized bed bakes burning furnace over a slow fire to the problem of proposing among the above-mentioned background art is solved.

In order to achieve the above object, the utility model provides a following technical scheme:

a roasting furnace of a step heating fluidized bed comprises a roasting furnace and a gas-solid separator, wherein an outlet is formed in the bottom end of the roasting furnace, an air distribution plate is arranged at the bottom end inside the roasting furnace, a fluidized bed layer is arranged at the top of the air distribution plate, a first combustion chamber, a second combustion chamber and a third combustion chamber are sequentially arranged at the top of the fluidized bed layer from bottom to top, a gas-solid separator is arranged at the top end of one side of the roasting furnace, a material return pipe is mounted at the bottom end of the gas-solid separator in a penetrating manner, the gas-solid separator and the third combustion chamber are in penetrating connection through an air outlet pipe, the gas-solid separator, the first combustion chamber and the second combustion chamber are in penetrating connection through an air return pipe, a first return valve and a second return valve are respectively sleeved on the air return pipe close to the first combustion chamber and the second combustion chamber, a first air inlet pipe and a second return valve are respectively sleeved on one side, far away from the gas-solid separator, from bottom to top, of the first air inlet pipe and the first air inlet pipe are mounted on one side of the roasting furnace, The air conditioner comprises a first air inlet pipe, a second air inlet pipe and a third air inlet pipe, wherein a first air inlet valve, a second air inlet valve and a third air inlet valve are respectively sleeved on the first air inlet pipe, the second air inlet pipe and the third air inlet pipe.

Preferably, coarse quartz sand is paved at the top of the fluidized bed layer, and the fluidized bed layer is communicated with an external hopper through a feeder.

Preferably, the second air inlet pipe and the third air inlet pipe are respectively communicated with the second combustion cavity and the third combustion cavity.

Preferably, the first air inlet pipe, the return pipe and the roasting furnace are all in through connection, one end of the first air inlet pipe and one end of the return pipe, which are close to the roasting furnace, are respectively arranged at the bottom of the air distribution plate and the top of the fluidized bed layer, and the bottom of the first air inlet pipe is provided with an igniter in a through manner.

Preferably, the first air inlet valve, the second air inlet valve, the third air inlet valve, the first return valve, the second return valve and the igniter are connected with the controller in a wireless mode, and the first air inlet valve, the igniter, the second air inlet valve, the first return valve, the third air inlet valve and the second return valve form an independent loop.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, during the use, open the first air inlet valve and the igniter of cup joint on first intake pipe through the controller, a certain amount of combustible gas passes through first intake pipe and gets into the burning furnace that bakes over a slow fire later, and certain speed passes through the air distribution board, make coarse quartz sand be the state of boiling fluidization, simultaneously outside hopper is leading-in to the fluidized bed through the dispenser, in this moment, dry in first burning intracavity portion, and the waste gas that has the temperature of dry production, can pass through second burning chamber and third burning intracavity and enter into gas-solid separator through the tuber pipe, the gas that has high temperature after handling later can be derived through the return air pipe, and start first return valve, the gas of high temperature can get into first burning chamber this moment, and utilize the mobility of gas, convey the material and coarse quartz sand together to second burning chamber, start the second air inlet valve simultaneously, at the moment, the second air inlet pipe leads a certain amount of combustible gas into the second combustion chamber, the combustible gas is combined with high-temperature gas to be combusted, the material is crushed in the second combustion chamber, waste gas and particles generated in the crushing process can pass through the third combustion chamber and enter the gas-solid separator through the air outlet pipe, the treated gas with high temperature can be led out through the air return pipe, the second return valve is started, the high-temperature gas can enter the second combustion chamber, the material and coarse quartz sand are conveyed to the third combustion chamber together by utilizing the flowability of the gas, meanwhile, the third air inlet valve is started, the third air inlet pipe leads a certain amount of combustible gas into the third combustion chamber, the combustible gas is combined with the high-temperature gas to be combusted, the material is gasified and combusted in the third combustion chamber, and the material passes through the first combustion chamber in the whole process, The second combustion chamber and the third combustion chamber are used for three-stage combustion to complete drying, crushing and gasification combustion, and proper combustible gas is sequentially introduced in the material three-stage combustion process by utilizing the additionally arranged first air inlet pipe, the second air inlet pipe and the third air inlet pipe, low-temperature combustion, medium-temperature combustion and high-temperature combustion are sequentially performed, and combustion operation is performed by utilizing low, medium and high different combustion temperatures.

Drawings

FIG. 1 is a schematic view of the overall front view of the external structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the roasting furnace of the present invention;

fig. 3 is a schematic diagram of the connection structure of the system control in the present invention;

in the figure: 1. roasting furnace; 2. a gas-solid separator; 3. a return air duct; 4. an air outlet pipe; 5. a material returning pipe; 6. a first intake pipe; 7. a second intake pipe; 8. a third intake pipe; 9. a first intake valve; 10. a second intake valve; 11. a third intake valve; 12. a first return valve; 13. a second return valve; 14. an outlet; 15. an air distribution plate; 16. a fluidized bed layer; 17. a first combustion chamber; 18. a second combustion chamber; 19. a third combustion chamber.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

a roasting furnace of a step heating fluidized bed comprises a roasting furnace 1 and a gas-solid separator 2, wherein an outlet 14 is formed in the bottom end of the roasting furnace 1, an air distribution plate 15 is arranged at the bottom end inside the roasting furnace 1, a fluidized bed layer 16 is arranged at the top of the air distribution plate 15, a first combustion chamber 17, a second combustion chamber 18 and a third combustion chamber 19 are sequentially arranged at the top of the fluidized bed layer 16 from bottom to top, the gas-solid separator 2 is arranged at the top end of one side of the roasting furnace 1, a return pipe 5 is arranged at the bottom end of the gas-solid separator 2 in a penetrating manner, the gas-solid separator 2 and the third combustion chamber 19 are in a penetrating manner through an air outlet pipe 4, the gas-solid separator 2, the first combustion chamber 17 and the second combustion chamber 18 are in a penetrating manner through an air return pipe 3, and a first return valve 12 is respectively sleeved on the air return pipe 3 and close to the first combustion chamber 17 and the second combustion chamber 18, A second reflux valve 13, wherein a first air inlet pipe 6, a second air inlet pipe 7 and a third air inlet pipe 8 are installed at one side of the roasting furnace 1 far from the gas-solid separator 2 from bottom to top, a first air inlet valve 9, a second air inlet valve 10 and a third air inlet valve 11 are respectively sleeved on the first air inlet pipe 6, the second air inlet pipe 7 and the third air inlet pipe 8, when in use, the first air inlet valve 9 and an igniter sleeved on the first air inlet pipe 6 are opened through a controller, then a certain amount of combustible gas enters the roasting furnace 1 through the first air inlet pipe 6, and passes through an air distribution plate 15 at a certain speed, so that coarse quartz sand is in a boiling fluidization state, meanwhile, an external hopper is guided into a fluidization bed layer 16 through a feeder, and at the same time, drying is performed inside the first combustion chamber 17, and waste gas with temperature generated by drying enters the gas-solid separator 2 through the air outlet pipe 4 in the second combustion chamber 18 and the third combustion chamber 19, then the treated gas with high temperature is led out through the air return pipe 3, the first return valve 12 is started, the gas with high temperature enters the first combustion chamber 17 at the moment, the material and the coarse quartz sand are conveyed to the second combustion chamber 18 together by utilizing the fluidity of the gas, the second air inlet valve 10 is started at the same time, the second air inlet pipe 7 guides a certain amount of combustible gas into the second combustion chamber 18 at the moment, the combustible gas is combined with the high temperature gas to be combusted, the material is crushed in the second combustion chamber 18, then the waste gas and particles generated in the crushing process enter the gas-solid separator 2 through the air outlet pipe 4 in the third combustion chamber 19, the treated gas with high temperature is led out through the air return pipe 3, the second return valve 13 is started, the gas with high temperature enters the second combustion chamber 18 at the moment and utilizes the fluidity of the gas, the materials and the coarse quartz sand are conveyed to a third combustion chamber 19 together, a third air inlet valve 11 is started simultaneously, at the moment, a third air inlet pipe 8 leads a certain amount of combustible gas into the third combustion chamber 19, the combustible gas is combined with high-temperature gas to be combusted, the materials are gasified and then combusted in the third combustion chamber 19, in the whole process, the materials are subjected to three-stage combustion through a first combustion chamber 17, a second combustion chamber 18 and the third combustion chamber 19, drying, crushing and gasification combustion are completed, a proper amount of combustible gas is sequentially led in the three-stage combustion process of the materials by utilizing the additionally arranged first air inlet pipe 6, a second air inlet pipe 7 and the third air inlet pipe 8, low-temperature combustion, medium-temperature combustion and high-temperature combustion are sequentially realized, combustion operation is carried out by utilizing different combustion temperatures of low, medium and high, the combustion efficiency is high, energy is saved, the energy consumption is low, and the second backflow valve 12 and the second backflow valve 13 which are combined can be effectively utilized as the residual heat of the second combustion chamber on one hand 18. The third combustion chamber 19 preheats, can also create the temperature environment of spontaneous combustion for combustible gas, and whole process only needs to use an igniter, and on the other hand provides the drive power that rises for the material, need not the support of external power equipment to this further reaches energy-conservation.

The utility model discloses the theory of operation: when the device is used, the first air inlet valve 9 and the igniter sleeved on the first air inlet pipe 6 are opened through the controller, then a certain amount of combustible gas enters the roasting furnace 1 through the first air inlet pipe 6, and passes through the air distribution plate 15 at a certain speed, so that coarse quartz sand is in a boiling fluidized state, meanwhile, an external hopper is introduced into the fluidized bed layer 16 through the feeder, and at the same time, the internal part of the first combustion chamber 17 is dried, and waste gas with temperature generated by drying enters the gas-solid separator 2 through the second combustion chamber 18 and the third combustion chamber 19 through the air outlet pipe 4, and then the treated gas with high temperature is led out through the air return pipe 3, and the first reflux valve 12 is started, at the moment, the high-temperature gas enters the first combustion chamber 17, and the material and the coarse quartz sand are conveyed to the second combustion chamber 18 together by utilizing the fluidity of the gas, simultaneously starting a second air inlet valve 10, leading a certain amount of combustible gas into a second combustion cavity 18 by a second air inlet pipe 7, combining the combustible gas with high-temperature gas to generate combustion, crushing the material in the second combustion cavity 18, leading waste gas and particles generated in the crushing process into a gas-solid separator 2 through an air outlet pipe 4 in a third combustion cavity 19, leading the processed gas with high temperature out through an air return pipe 3, starting a second return valve 13, leading the high-temperature gas into the second combustion cavity 18, conveying the material and coarse quartz sand to a third combustion cavity 19 by using the fluidity of the gas, starting a third air inlet valve 11, leading a certain amount of combustible gas into the third combustion cavity 19 by a third air inlet pipe 8, combining the combustible gas with the high-temperature gas to generate combustion, and gasifying and then combusting the material in the third combustion cavity 19, and in the whole process, the materials are combusted in three stages through the first combustion chamber 17, the second combustion chamber 18 and the third combustion chamber 19 to complete drying, crushing and gasification combustion, and a proper amount of combustible gas can be sequentially introduced in the three-stage combustion process of the materials by utilizing the additionally arranged first air inlet pipe 6, the second air inlet pipe 7 and the third air inlet pipe 8, so that low-temperature combustion, medium-temperature combustion and high-temperature combustion are sequentially realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A step heating fluidized bed roasting furnace comprises a roasting furnace (1) and a gas-solid separator (2), and is characterized in that: an outlet (14) is formed in the bottom end of the roasting furnace (1), an air distribution plate (15) is arranged at the bottom end inside the roasting furnace (1), a fluidized bed layer (16) is arranged at the top of the air distribution plate (15), a first combustion chamber (17), a second combustion chamber (18) and a third combustion chamber (19) are sequentially arranged at the top of the fluidized bed layer (16) from bottom to top, a gas-solid separator (2) is arranged at the top end of one side of the roasting furnace (1), a return pipe (5) is installed at the bottom end of the gas-solid separator (2) in a penetrating manner, the gas-solid separator (2) and the third combustion chamber (19) are in a penetrating manner through an air outlet pipe (4), the gas-solid separator (2) is in a penetrating manner with the first combustion chamber (17) and the second combustion chamber (18) through a return pipe (3), and the return pipe (3) is close to the first combustion chamber (17), The second combustion chamber (18) is respectively sleeved with a first backflow valve (12) and a second backflow valve (13), one side, away from the gas-solid separator (2), of the roasting furnace (1) is provided with a first air inlet pipe (6), a second air inlet pipe (7) and a third air inlet pipe (8) from bottom to top, and the first air inlet pipe (6), the second air inlet pipe (7) and the third air inlet pipe (8) are respectively sleeved with a first air inlet valve (9), a second air inlet valve (10) and a third air inlet valve (11).

2. A step heated fluidized bed roaster according to claim 1, wherein: coarse quartz sand is paved at the top of the fluidized bed layer (16), and the fluidized bed layer (16) is communicated with an external hopper through a feeder.

3. A step heated fluidized bed roaster according to claim 1, wherein: the second air inlet pipe (7) and the third air inlet pipe (8) are respectively communicated with the second combustion cavity (18) and the third combustion cavity (19).

4. A step heated fluidized bed roaster according to claim 1, wherein: the first air inlet pipe (6), the return pipe (5) and the roasting furnace (1) are all in through connection, one end, close to the roasting furnace (1), of the first air inlet pipe (6) and the return pipe (5) is respectively arranged at the bottom of the air distribution plate (15) and the top of the fluidized bed layer (16), and meanwhile, an igniter is installed at the bottom of the first air inlet pipe (6) in a through mode.

5. A step heated fluidized bed roaster according to claim 1, wherein: the external wireless connection of the first air inlet valve (9), the second air inlet valve (10), the third air inlet valve (11), the first return valve (12), the second return valve (13) and the igniter is provided with a controller, and the first air inlet valve (9), the igniter, the second air inlet valve (10), the first return valve (12), the third air inlet valve (11) and the second return valve (13) form an independent loop.