CN210624509U - Air-blowing slag-discharging system of fluidized bed furnace - Google Patents
Air-blowing slag-discharging system of fluidized bed furnace Download PDFInfo
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- CN210624509U CN210624509U CN201921241684.9U CN201921241684U CN210624509U CN 210624509 U CN210624509 U CN 210624509U CN 201921241684 U CN201921241684 U CN 201921241684U CN 210624509 U CN210624509 U CN 210624509U
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- air
- slag
- cooling box
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- fluidized bed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a blast furnace slag-feeding system of a fluidized bed furnace, which comprises a combustion chamber, an air cooling box, a blower and a secondary air pipeline, wherein the combustion chamber is provided with a secondary air inlet hole communicated with an inner cavity of the combustion chamber; the air cooling box is provided with a long sealed inner cavity, one end of the air cooling box is provided with an air inlet hole, the other end of the air cooling box is provided with an air outlet, and the inner cavity of the air cooling box is upwards communicated with the inner cavity of the combustion chamber at one end of the air inlet hole; the air outlet end of the air blower is communicated with the air inlet hole, and the air blower is used for blowing air into the air cooling box; one end of the secondary air pipeline is communicated with the secondary air inlet hole, and the other end of the secondary air pipeline is communicated with the air outlet. Compared with the prior art, the beneficial effects of the utility model include: the heat in the slag is transferred to the gas in the air cooling box through the combination of the blower and the air cooling box, and the heated gas in the air cooling box is blown into the combustion chamber, so that the aim of recovering waste heat in the slag is fulfilled; the slag storage bin stores the slag, so that the purposes of reducing dust emission and reducing labor cost are achieved.
Description
Technical Field
The utility model relates to an industry hot-blast furnace field especially relates to a slag system is sent to fluidized bed furnace wind.
Background
The boiling furnace is widely applied in industrial production, a large amount of slag is formed in the working process of the boiling furnace, most of the existing boiling furnace equipment is used for discharging slag on the bottom or the side of the furnace, and when the slag is accumulated to a certain amount, the slag is manually recycled. This slag treatment has significant disadvantages: on one hand, the slag treatment mode can cause dust diffusion, harm human health and not meet the requirement of environmental protection; on the other hand, the slag treatment mode needs manpower to recover slag manually, so that the efficiency is low, and the labor cost is high; in addition, the temperature of the slag just discharged is high, heat energy in the slag is wasted by directly discharging the slag, and meanwhile, certain potential safety hazard is brought.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a fluidized bed furnace slag discharging system that can recover waste heat from slag, reduce dust emission, and reduce labor cost.
A blast deslagging system for a fluidized bed furnace comprises a combustion chamber, an air cooling box, a blower and a secondary air pipeline,
the combustion chamber is provided with a secondary air inlet communicated with the inner cavity of the combustion chamber;
the air cooling box is provided with a long sealed inner cavity, one end of the air cooling box is provided with an air inlet hole, the other end of the air cooling box is provided with an air outlet, and the inner cavity of the air cooling box is upwards communicated with the inner cavity of the combustion chamber at one end of the air inlet hole;
the air outlet end of the air blower is communicated with the air inlet hole, and the air blower is used for blowing air into the air cooling box;
one end of the secondary air pipeline is communicated with the secondary air inlet hole, and the other end of the secondary air pipeline is communicated with the air outlet.
Compared with the prior art, the beneficial effects of the utility model include: the heat in the slag is transferred to the gas in the air cooling box through the combination of the blower and the air cooling box, and the heated gas in the air cooling box is blown into the combustion chamber, so that the aim of recovering waste heat in the slag is fulfilled; the slag storage bin stores the slag, so that the purposes of reducing dust emission and reducing labor cost are achieved.
Drawings
FIG. 1 is a front view of an embodiment of a fluidized bed furnace air supply and slag discharge system provided by the present invention;
FIG. 2 is a partial front view of FIG. 1;
FIG. 3 is a right side view corresponding to FIG. 2;
FIG. 4 is a front view of the premix distributor of FIG. 2;
in the figure: 1-combustion chamber, 11-combustion-supporting air inlet hole, 12-secondary air inlet hole, 13-coal inlet hole, 14-hot air outlet hole, 15-blast cap, 2-combustion-supporting mechanism, 21-isobaric blast box, 211-slag discharge hole, 22-combustion-supporting fan, 3-air cooling box, 31-air inlet hole, 32-air outlet, 33-slag discharge hole, 34-coke discharge hole, 35-top cover, 4-screen assembly, 41-upper screen, 42-lower screen, 5-guide assembly, 51-guide plate, 511-slag discharge hole, 512-flange, 52-guide strip, 6-vibration mechanism, 61-vibration exciter, 62-vibration damper, 63-base, 7-premixing assembly, 71-premixing chamber, 711-slag inlet hole, 712-air inlet hole, 72-a premixing distributor, 721-a steel ring, 721 a-a first steel ring, 721 b-a second steel ring, 721 c-a third steel ring, 721 d-a fourth steel ring, 722-a connecting bar, 8-a secondary air pipeline, 9-a slag conveying mechanism, 91-a slag conveying fan, 92-a slag storage bin, 921-a slag discharge port, 93-a slag conveying air pipe and 931-a slag inlet hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the utility model provides a fluidized bed furnace wind is sent and is arranged sediment system, including combustion chamber 1, combustion-supporting mechanism 2, air-cooled case 3, screen assembly 4, guide subassembly 5, vibration mechanism 6, mix subassembly 7 in advance, air-blower, overgrate air pipeline 8 and send sediment mechanism 9.
Referring to fig. 1, the combustion chamber 1 has a combustion-supporting air inlet 11, a secondary air inlet 12, a coal inlet 13 and a hot air outlet 14 which are communicated with an inner cavity thereof. In this embodiment, the combustion-supporting air inlet hole 11 is located on the bottom surface of the combustion chamber 1. The overfire air inlet hole 12, the coal inlet 13 and the hot air outlet 14 may be provided on the side wall or the top surface of the combustion chamber 1. In this embodiment, the overfire air inlet 12, the coal inlet 13 and the hot air outlet 14 are disposed on the side wall of the combustion chamber 1, the overfire air inlet 12 is disposed on the same side as the coal inlet 13, the hot air outlet 14 is disposed on the opposite side, and the hot air outlet 14 is used for externally connecting a heat supply pipeline. The combustion-supporting air inlet hole 11 is provided with an air cap 15.
Referring to fig. 1, the combustion-supporting mechanism 2 includes an isobaric air box 21 and a combustion-supporting fan 22, the isobaric air box 21 is located below the combustion-supporting air inlet 11, an air outlet end of the isobaric air box 21 is opposite to the combustion-supporting air inlet 11, and a slag discharge port 211 communicated with an inner cavity of the isobaric air box 21 is formed in a bottom surface of the isobaric air box 21. And the air outlet end of the combustion-supporting fan 22 is communicated with the air inlet end of the constant-pressure air box 21. The combustion-supporting fan 22 is used for blowing air into the isobaric air box 21, the isobaric air box 21 converts the blown air into isobaric air with uniform air outlet, the isobaric air is conveyed into the combustion chamber 1 through the air cap 15, and the coal particles in the combustion chamber 1 are blown up to be in a boiling state, so that the coal particles can be fully combusted.
Referring to fig. 1-3, the air cooling box 3 has an obliquely arranged long sealed inner cavity, and the upper end of the top surface of the air cooling box 3 is provided with an air inlet hole 31. The lower end of the top surface of the air cooling box 3 is provided with an air outlet 32. Two corners of the lower end of the inner bottom surface of the air cooling box 3 are respectively provided with a slag discharging port 33 and a coke discharging port 34. The air-cooling box 3 also has a top cover 35 to facilitate cleaning of the inside of the air-cooling box 3 and replacement of internal parts.
Referring to fig. 1 to 3, the screen assembly 4 is disposed at the upper end inside the air cooling box 3, and is composed of at least two layers of screens inclined in the same direction as the air cooling box 3, and includes an upper screen 41 located at the uppermost layer and at least a lower screen 42 located below the upper screen 41, and the mesh diameters of the screens of the screen assembly 4 are sequentially reduced from top to bottom. In this embodiment, the number of the lower screens 42 is one.
Referring to fig. 1 to 3, the material guiding assembly 5 includes a material guiding plate 51 and a material guiding strip 52. The material guide plate 51 and the upper screen 41 are obliquely arranged at the lower end inside the air cooling box 3 in the same direction, the inclination angle is not smaller than that of the upper screen 41, the width of the material guide plate 51 gradually decreases from top to bottom, the width of the lowest end is not larger than the diameter of the coke discharge port 34, the lowest end of the material guide plate 51 is provided with a slag leakage port 511 penetrating through the material guide plate 51, the slag leakage port 511 is positioned right above the coke discharge port 34, the upper side edge of the material guide plate 51 is superposed with the lower side edge of the upper screen 41, flanges 512 are arranged on the edges of the material guide plate 51 except for the part in contact with the upper screen 41, and the flanges 512 are used for blocking slag. The guide plate 51 is used for guiding coarse particle impurities on the upper screen 41 to the coke discharge port 34 and discharging the coarse particle impurities out of the air cooling box 3.
Referring to fig. 1 to 3, the material guiding strip 52 is disposed on the inner bottom surface of the air cooling box 3, two ends of the material guiding strip 52 are respectively located on two adjacent sides of the lower end of the inner bottom surface of the air cooling box 3, one end of the material guiding strip is located between the lower slag hole 33 and the coke discharging hole 34 and close to the lower slag hole 33, the other end of the material guiding strip is located above the coke discharging hole 34 and outside the lower side edge of the lower screen 42, and the horizontal distance between the material guiding strip and the lower side edge of the lower screen 42 is greater than a set value. The set value is the maximum horizontal distance which the slag passes through in the air in the process of falling from the lowest end of the lower screen 42 to the inner bottom surface of the air cooling box 3, and can be obtained through experiment or theoretical calculation. The reason for keeping the lower screen 42 and the material guiding strip 52 at a certain horizontal distance is to ensure that the slag falls from the lowest end of the lower screen 42 to the inner bottom surface of the air cooling box 3, and is all located on the upper side of the material guiding strip 52, so that the slag enters the lower slag outlet 33 and is discharged out of the air cooling box 3 under the guidance of the material guiding strip 52, and does not cross the material guiding strip 52, enters the coke discharging outlet 34 and is discharged out of the air cooling box 3, and is mixed with coarse particle impurities.
Referring to fig. 1 to 3, the vibration mechanism 6 includes an exciter 61, a damper base 62, and a base 63, where the exciter 61 and the damper base 62 are both connected to the air-cooling box 3, and the base 63 is connected to the damper base 62. The vibration exciter 61 is used for generating vibration, and the vibration absorption seat 62 and the base 63 are used for matching with the vibration exciter 61 to drive the air cooling box 3 to vibrate.
Referring to fig. 1 to 4, the premixing component 7 includes a premixing chamber 71 and a premixing distributor 72, the premixing chamber 71 has an inner cavity downwardly communicating with the air inlet hole 31, a slag inlet 711 communicating with the inner cavity of the premixing chamber 71 is disposed on the top surface, an air inlet 712 communicating with the inner cavity of the premixing chamber 71 is disposed on the side surface, and the slag inlet 711 communicates with the slag outlet 211. The premixing distributor 72 is arranged in the premixing chamber 71, is positioned under the slag inlet 711, and comprises a plurality of steel rings 721 and connecting bars 722, wherein the steel rings 721 are surrounded by heat-resistant steel bars, the steel rings 721 are coaxially arranged at intervals, the diameters of the steel rings are sequentially increased from top to bottom, and the connecting bars 722 connect the steel rings 721 together. In this embodiment, the number of the steel rings 721 is four. The slag falls from the slag inlet 711 to the pre-mixer distributor 72, and contacts the uppermost first steel ring 721a first and is divided, and then contacts the second steel ring 721b, the third steel ring 721c, and the fourth steel ring 721d in sequence and is further divided in sequence, so that the effects of scattering the slag, facilitating the slag to be mixed with air sufficiently, and allowing the slag to fall onto the upper screen 41 more uniformly are achieved.
Referring to fig. 1, an air outlet end of the blower is communicated with the air inlet 712, and is configured to blow air into the air cooling box 3. The blower can be arranged independently or can share one blower with the combustion fan 22. In this embodiment, in order to save equipment investment, the blower and the combustion fan 22 share one fan, that is, the combustion fan 22 outputs combustion air to both the combustion chamber 1 and the air cooling box 3, and the air outlet end of the combustion fan 22 is communicated with the air inlet 712.
Referring to fig. 1, one end of the secondary air duct 8 is communicated with the secondary air inlet hole 12, and the other end is communicated with the air outlet 32.
Referring to fig. 1, the fluidized bed furnace air slag conveying and discharging system further includes a slag conveying mechanism 9, the slag conveying mechanism 9 includes a slag conveying fan 91, a slag storage bin 92 and a slag conveying air pipe 93, the slag storage bin 92 is used for storing slag, the slag storage bin 92 has a slag discharging port 921 arranged at the bottom thereof and communicated with an inner cavity thereof, one end of the slag conveying air pipe 93 is communicated with an air outlet end of the slag conveying fan 91, the other end of the slag conveying air pipe is communicated with the inner cavity of the slag storage bin 92, the slag conveying air pipe 93 has a slag inlet 931 arranged on and penetrating through a pipe wall thereof, and the slag inlet 931 is communicated with the slag discharging port 33 through a pipeline.
The working process of the air-conveying slag-discharging system of the fluidized bed furnace is as follows: when the fluidized bed furnace works, slag is continuously formed in the combustion chamber 1 and falls downwards to the constant-pressure air box 21; then, the slag falls into the air cooling box 3 through the slag inlet 711, the slag is scattered by the premixing distributor 72 and is fully mixed with the air blown in from the combustion fan 22, the temperature is reduced, the slag then falls onto the upper screen 41, coarse particle impurities (such as iron blocks and coke blocks) in the slag are left on the upper screen 41, roll downwards into the material guide plate 51 along with the vibration of the upper screen 41, enter the slag leakage opening 511 under the guide of the material guide plate 51, then fall into the coke discharge opening 34, and leave the air cooling box 3 to wait for being collected; other particles in the slag fall onto the lower screen 42, wherein slow-cooling medium-sized slag is left on the lower screen 42 and is suspended to be subjected to air cooling, fast-cooling fine-sized slag falls onto the inner bottom surface of the air cooling box 3 so as to reduce ash entrainment of cooling air, the medium-sized slag falls onto the inner bottom surface of the air cooling box 3 after reaching the lowest end of the lower screen 42 and is converged with the fine-sized slag on the inner bottom surface of the air cooling box 3, the medium-sized slag and the fine-sized slag are guided by the guide strip 52 after being converged, enter the slag discharge port 33, are blown into the slag conveying air pipe 93 along the pipeline, and are conveyed into the slag storage bin 92 along the slag conveying air pipe 93 under the blowing of the slag conveying fan 91; the gas in the air cooling box 3 is heated while cooling the slag, and the heated gas leaves the air cooling box 3 from the air outlet 32 under the driving of the combustion fan 22 and flows into the combustion chamber 1 through the secondary air pipeline 8, so that the secondary air is supplemented into the combustion chamber 1 on one hand, and the waste heat in the slag can be recycled on the other hand.
The slag after the cooling is concentrated and is collected in storage slag bin 92, consequently can reduce raise dust content in the air, when the slag is retrieved to needs, only need will retrieve the car and arrange in storage slag bin 92 under, open and unload sediment mouth 921 and can accomplish and unload the sediment, consequently the technical scheme of the utility model can save the required cost of labor of scarfing cinder greatly.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A fluidized bed furnace air-conveying slag-discharging system is characterized by comprising a combustion chamber, an air cooling box, a blower and a secondary air pipeline,
the combustion chamber is provided with a secondary air inlet communicated with the inner cavity of the combustion chamber;
the air cooling box is provided with a long sealed inner cavity, one end of the air cooling box is provided with an air inlet hole, the other end of the air cooling box is provided with an air outlet, and the inner cavity of the air cooling box is upwards communicated with the inner cavity of the combustion chamber at one end of the air inlet hole;
the air outlet end of the air blower is communicated with the air inlet hole, and the air blower is used for blowing air into the air cooling box;
one end of the secondary air pipeline is communicated with the secondary air inlet hole, and the other end of the secondary air pipeline is communicated with the air outlet.
2. The air-blast slag-discharging system of the fluidized bed furnace as claimed in claim 1, wherein the bottom surface of the air-cooled box is provided with a slag discharging port;
the air-blowing slag-discharging system of the fluidized bed furnace further comprises a slag-feeding mechanism, wherein the slag-feeding mechanism comprises a slag-feeding fan, a slag storage bin and a slag-feeding air pipe, the slag storage bin is used for storing slag, the slag storage bin is provided with a slag-discharging opening which is arranged at the bottom of the slag storage bin and communicated with an inner cavity of the slag storage bin, one end of the slag-feeding air pipe is communicated with an air-out end of the slag-feeding fan, the other end of the slag-feeding air pipe is communicated with the inner cavity of the slag storage bin, the slag-feeding air pipe is provided with a slag-feeding hole which is arranged on the pipe wall of the slag-feeding air.
3. The air supply and slag discharge system of the fluidized bed furnace as claimed in claim 1, wherein the bottom of the combustion chamber is provided with a combustion-supporting air inlet hole communicated with the inner cavity of the combustion chamber;
the fluidized bed furnace air-assisted slagging system further comprises a combustion-supporting mechanism, the combustion-supporting mechanism comprises an isobaric air box and a combustion-supporting fan, the isobaric air box is located below a combustion-supporting air inlet hole, the air outlet end of the isobaric air box is opposite to the combustion-supporting air inlet hole, and the air outlet end of the combustion-supporting fan is communicated with the air inlet end of the isobaric air box.
4. The air supply and slag discharge system of the fluidized bed furnace as claimed in claim 3, wherein the air inlet hole is arranged on the top surface of the air cooling box, and the bottom surface of the isobaric air box is provided with a slag discharge port communicated with the inner cavity of the isobaric air box;
the slagging system is sent to boiling furnace wind still includes and mixes the subassembly in advance, mix the subassembly in advance including mixing chamber and premixing distributor in advance, mix the chamber in advance have downwards with the inner chamber of fresh air inlet intercommunication, mix the chamber top surface in advance be provided with mix advance the slag notch of indoor chamber intercommunication in advance, the side be provided with mix the air intake of indoor chamber intercommunication in advance, advance the slag notch with arrange the slag notch intercommunication, the air intake with the air-out end intercommunication of air-blower, premixing distributor sets up in advance in the premix, be located advance under the slag notch, including a plurality of steel rings and connecting strip, the steel ring is enclosed by heat-resisting billet, the coaxial interval of each steel ring sets up, and diameter top-down increases in proper order, the connecting strip will each steel ring links together.
5. The air-blast cinder system of claim 1, wherein the side wall or the top surface of the combustion chamber is provided with a coal inlet communicated with the inner cavity of the combustion chamber.
6. The air supply and slag discharge system of the fluidized bed furnace as claimed in claim 1, wherein the side wall or the top surface of the combustion chamber is provided with a hot air outlet communicated with the inner cavity of the combustion chamber, and the hot air outlet is externally connected with a heat supply pipeline.
7. The air supply and slag discharge system of the fluidized bed furnace as claimed in claim 1, wherein the inner cavity of the air cooling box is arranged obliquely, a slag discharge port is arranged at one corner of the lower end of the bottom surface of the air cooling box, a coke discharge port is arranged at the other corner of the lower end of the bottom surface of the air cooling box, the air inlet hole is positioned at the upper end of the top surface of the air cooling box, and the air outlet hole is positioned at the lower end of the top surface of the air cooling box;
the wind-driven deslagging system of the fluidized bed furnace is characterized in that the wind-driven deslagging system of the fluidized bed furnace is arranged in the fluidized bed furnace and comprises screen assemblies, wherein the screen assemblies are formed by at least two layers of screens and the screens inclined in the same direction of the wind-driven cooling box, the mesh diameters of the screens of all layers of the screen assemblies are sequentially reduced from top to bottom, each screen assembly comprises an upper screen positioned on the uppermost layer and at least one lower screen positioned below the upper screen, and the upper screen and the coke discharge port are arranged in a matched mode.
8. The air supply and slag discharge system of the fluidized bed furnace as claimed in claim 7, wherein the lower screen is arranged at the upper end of the inside of the air cooling box, and the inner bottom surface of the air cooling box is matched with the lower slag hole.
9. The air-cooled slag-discharging system for the fluidized bed furnace of claim 7 or 8, wherein the air-cooled slag-discharging system for the fluidized bed furnace further comprises a vibration mechanism, and the vibration mechanism is connected with the air-cooled box and is used for driving the air-cooled box to vibrate;
the vibration mechanism comprises a vibration exciter, a base and a shock absorption seat, the vibration exciter and the shock absorption seat are connected with the air cooling box, and the base is connected with the shock absorption seat.
10. The air blast slagging system according to claim 1, wherein said air cooling box has a top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241684.9U CN210624509U (en) | 2019-08-02 | 2019-08-02 | Air-blowing slag-discharging system of fluidized bed furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921241684.9U CN210624509U (en) | 2019-08-02 | 2019-08-02 | Air-blowing slag-discharging system of fluidized bed furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210624509U true CN210624509U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921241684.9U Expired - Fee Related CN210624509U (en) | 2019-08-02 | 2019-08-02 | Air-blowing slag-discharging system of fluidized bed furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210624509U (en) |
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2019
- 2019-08-02 CN CN201921241684.9U patent/CN210624509U/en not_active Expired - Fee Related
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