CN206607260U - The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln - Google Patents
The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln Download PDFInfo
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- CN206607260U CN206607260U CN201720301899.XU CN201720301899U CN206607260U CN 206607260 U CN206607260 U CN 206607260U CN 201720301899 U CN201720301899 U CN 201720301899U CN 206607260 U CN206607260 U CN 206607260U
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- top gas
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Abstract
The utility model discloses the waste-heat recovery device of gas-based shaft kiln and gas-based shaft kiln, gas-based shaft kiln includes body of heater and material bin.Waste-heat recovery device includes：Exchange heat storehouse and at least one gas passage.Heat exchange storehouse has material inlet, material outlet, top gas entrance and top gas outlet, material inlet is connected with material bin, and material outlet is connected with body of heater, and top gas entrance is connected with the exhaust outlet of body of heater, heat exchange has punishment in advance chamber in storehouse, and punishment in advance chamber is respectively communicated with material inlet and material outlet.Gas passage is located at punishment in advance intracavitary, and gas passage two ends are respectively communicated with top gas entrance and top gas outlet.According to the waste-heat recovery device of gas-based shaft kiln of the present utility model, by setting heat exchange storehouse and gas passage, the high temperature furnace top gas discharged from the exhaust outlet of body of heater can carry out heat exchange with the material of punishment in advance intracavitary, so as to transfer heat to material, the material for entering body of heater is preheated.Thus, reused the waste heat of top gas.
Description
Technical field
The utility model is related to metal smelt technical field, specifically, more particularly to a kind of waste heat of gas-based shaft kiln is returned
Receiving apparatus and gas-based shaft kiln.
Background technology
Gas-based shaft kiln is the main reactor of reduced iron, is also the conventional reactor of smelting reduction process pre-reduction stage.
Thermal source is mainly derived from fresh gas heat in shaft furnace, the need for meeting heat supply, and shaft furnace need to be passed through a large amount of fresh coal gas, furnace roof
Gas tapping temperature is about 450 DEG C, and about 40% energy is taken away by top gas, and heat loss is relatively large.
In correlation technique, processing and Land use systems to top gas mainly have：After washing, pressurized treatments, make shaft furnace
The cooling gas of bottom cooling section.Top gas after completion cooling procedure is re-used as cracking agent and mixed with natural gas, then passes to and turns
Change stove and produce also Primordial Qi；It is most of to be returned with gas compressor pressurization feeding mixing chamber and natural gas after the scrubbed purification of top gas
Receive after mixing, feeding high temperature reformation stove carries out catalytic reforming and produces also Primordial Qi, directly feeds reduction shaft furnace and uses.Least a portion of stove
The burning that top gas is sent into outside reburner reaction tube as fuel with appropriate natural gas after mixing chamber is mixed；Top gas is by exchanging heat
After device heat exchange cooling, through CO2Removing means and vapor humidification device, Primordial Qi is gone back with the gas mixing formation from reformer,
Used after the common stove heat into heating for shaft furnace.There is shaft furnace top gas sensible heat and be not utilized effectively in aforesaid way,
The problem of causing energy waste.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model is carried
Go out a kind of waste-heat recovery device of gas-based shaft kiln, the waste-heat recovery device of the gas-based shaft kiln has simple in construction, energy-saving consumption-reducing
Advantage.
The utility model also proposes a kind of gas-based shaft kiln, and the gas-based shaft kiln includes the waste heat of gas-based shaft kiln described above
Retracting device.
According to the waste-heat recovery device of the gas-based shaft kiln of the utility model embodiment, the gas-based shaft kiln includes body of heater and thing
Feed bin, the waste-heat recovery device includes：Exchange heat storehouse, the heat exchange storehouse have material inlet, material outlet, top gas entrance and
Top gas is exported, and the material inlet is connected with the material bin, and the material outlet is connected with the body of heater, the top gas
Entrance is connected with the exhaust outlet of the body of heater, has punishment in advance chamber in the heat exchange storehouse, the punishment in advance chamber and the material inlet and
The material outlet is respectively communicated with；With at least one gas passage, the gas passage is located at the punishment in advance intracavitary, the gas
Passage two ends are respectively communicated with the top gas entrance and top gas outlet, and the gas passage is vertically extending.
According to the waste-heat recovery device of the gas-based shaft kiln of the utility model embodiment, by setting heat exchange storehouse and gas logical
Road, the high temperature furnace top gas discharged from the exhaust outlet of body of heater can carry out heat exchange with the material of punishment in advance intracavitary, so that by heat
Material is passed to, the material for entering body of heater is preheated.Thus, reused the waste heat of top gas, reached
The effects of energy-conserving and environment-protective.
According to some embodiments of the present utility model, the punishment in advance chamber has the diffluence room being spaced apart along the vertical direction and stove
Top gas discharges room, and the diffluence room and the lower end of the top gas entrance, the gas passage are respectively communicated with, the top gas row
Go out that room is exported with the top gas, the upper end of the gas passage is respectively communicated with.Thus, top gas can collect in airflow chamber
And disperse to be flowed into gas channel, then, the top gas in gas channel can be pooled to top gas discharge room, and through furnace roof
Gas outlet discharge.
Alternatively, nozzle is provided with the position connected on the gas passage with the top gas entrance.Thus, top gas
Can be entered by nozzle from top gas entrance in gas channel,
In some embodiments of the present utility model, the gas passage has expansion segment, and the gas passage is described
Cross-sectional area at expansion segment is S1, and cross-sectional area of the gas passage in the part in addition to the expansion segment is S2, wherein
S1 ＞ S2；
Junction between the expansion segment and other positions of the gas passage is provided with rounding off portion.Thus, may be used
To reduce resistance of the top gas when different tube diameters section flows, the fluency of furnace roof flow of air is improved.
According to some embodiments of the present utility model, the gas passage is multiple for what is be spaced apart, described in adjacent two
The distance between gas passage is L, and the L is met：50mm≤L≤500mm.Thus, changing for top gas and storeroom is enhanced
The thermal efficiency.
Further, the distance between two adjacent described gas passages are L, and the L is met：50mm≤L≤
500mm.Thus, flowing of the material in heat exchange storehouse is not only improved, while improving the heat exchange efficiency between top gas and material.
Alternatively, the punishment in advance intracavitary is provided with distributing device at the position of the material inlet.Thus, it is possible to make material
It is uniform to be distributed to punishment in advance intracavitary.
According to some embodiments of the present utility model, the upstream of the top gas entrance is provided with the adjustable flow control of aperture
Valve.Thus, it is possible to accurately control the flow of top gas, it is easy to the regulation of heat exchanging storehouse internal temperature.
In some embodiments of the present utility model, the waste-heat recovery device also includes：Dust discharger, the powder
Dirt discharger has gas feed, gas vent and dust outlet, and the gas feed is connected with the exhaust outlet of the body of heater,
The gas vent is connected with the top gas entrance.Thus, it is possible to be filtered out by dust discharger to top gas
Dirt.
Further, the inner bottom wall of the dust discharger is formed as inclined-plane, and the dust outlet is located at close to described
The bottom on inclined-plane, is provided with blower fan between the gas vent and the top gas entrance.Thus, by the way that inner bottom wall is set to
Inclined-plane, facilitates dust impurities to discharge dust discharger.By setting blower fan to provide driving force for the flowing of top gas.
According to the gas-based shaft kiln of the utility model embodiment, the gas-based shaft kiln includes the remaining of gas-based shaft kiln described above
Heat reclamation device.
According to the gas-based shaft kiln of the utility model embodiment, by setting waste-heat recovery device, it is possible to use gas-based shaft kiln
The high temperature furnace top gas of discharge is preheated to material, alleviates the top gas dedusting cooling of gas-based shaft kiln and the pressure of material preheating section
Power, reduces the energy loss of gas-based shaft kiln, improves energy utilization rate, energy-conserving and environment-protective.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
Fig. 1 is the waste-heat recovery device structural representation according to the gas-based shaft kiln of the utility model embodiment；
Fig. 2 is the partial structural diagram of the waste-heat recovery device of the gas-based shaft kiln according to the utility model embodiment.
Reference：
Waste-heat recovery device 100,
Exchange heat storehouse 10, material inlet 101, material outlet 102, top gas entrance 110, top gas outlet 120, punishment in advance chamber
130, gas passage 140, expansion segment 141, rounding off portion 142, diffluence room 150, top gas discharge room 160, nozzle 170 is protected
Warm layer 180,
Dust discharger 20, gas feed 210, gas vent 220, airway tube 221, dust outlet 230, dust hopper
231, dump skip 232, inner bottom wall 240, blower fan 250,
Gas-based shaft kiln 500,
Body of heater 510, exhaust outlet 511, filter 512,
Material bin 520, opening 521.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, it is to be understood that term " length ", " width ", " thickness ", " on ", " under ",
"front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " axial direction ", " radial direction ", " circumference " etc. refer to
The orientation or position relationship shown be based on orientation shown in the drawings or position relationship, be for only for ease of description the utility model and
Simplify description, rather than indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration
And operation, therefore it is not intended that to limitation of the present utility model.
Below with reference to waste-heat recovery device of Fig. 1 and Fig. 2 descriptions according to the gas-based shaft kiln 500 of the utility model embodiment
100.It should be noted that gas-based shaft kiln 500 can be used for metal smelt reactor, such as can be used for reduced iron.
As depicted in figs. 1 and 2, according to the waste-heat recovery device 100 of the gas-based shaft kiln 500 of the utility model embodiment, gas
Base shaft furnace 500 includes body of heater 510 and material bin 520.Waste-heat recovery device 100 includes：Heat exchange storehouse 10 and at least one gas lead to
Road 140.
Specifically, as shown in figure 1, heat exchange storehouse 10 has material inlet 101, material outlet 102, top gas entrance 110
With top gas outlet 120, material inlet 101 is connected with material bin 520, and material outlet 102 is connected with body of heater 510.Thus, material
Material in storehouse 520 can enter in heat exchange storehouse 10 from material inlet 101 and carry out heat exchange in heat exchange storehouse 10, pass through
Material after heat exchange can be from the outflow heat exchange of material outlet 102 storehouse 10, and enters in body of heater 510.It should be noted that
Material described here can be the material for providing heat during metal smelt, such as acid pellet to.
Top gas entrance 110 is connected with the exhaust outlet 511 of body of heater 510, and " connection " described here can both refer to furnace roof
Gas entrance 110 is directly connected with the exhaust outlet 511 of body of heater 510；It may also mean that the exhaust of top gas entrance 110 and body of heater 510
511 indirect communications of mouth, set for example, can also be communicated with other shown in Fig. 1, between top gas entrance 110 and exhaust outlet 511
It is standby.Exchanging heat, storehouse 10 is interior to have punishment in advance chamber 130, and punishment in advance chamber 130 is respectively communicated with material inlet 101 and material outlet 102.It is similar
Ground, " connection " described here can both refer to that punishment in advance chamber 130 was directly connected with material inlet 101 and material outlet 102, example
Such as, shown in the example in Fig. 1, the upper end (above-below direction as shown in Figure 1) of punishment in advance chamber 130 is connected, mistake with material inlet 101
The lower end (above-below direction as shown in Figure 1) of material chamber 130 is connected with material outlet 102；It may also mean that punishment in advance chamber 130 and thing
Entrance 101 and the indirect communication of material outlet 102 are expected, for example, cloth can be connected between material inlet 101 and punishment in advance chamber 130
Device etc., so that material is evenly distributed in punishment in advance chamber 130.
As shown in figure 1, gas passage 140 is located in punishment in advance chamber 130, gas passage 140 is along the vertical direction (such as institute in Fig. 1
The above-below direction shown) extension, the two ends of gas passage 140 are respectively communicated with top gas entrance 110 and top gas outlet 120.
It should be noted that as shown in figure 1, material (such as acid pellet) can enter heat exchange from material inlet 101
In the punishment in advance chamber 130 in storehouse 10.It is understood that the top gas discharged from the exhaust outlet 511 of body of heater 510 has higher temperature
(temperature of top gas is about 450 DEG C), high temperature furnace top gas can be entered in gas passage 140 from top gas entrance 110.Gas
High temperature furnace top gas in passage 140 can carry out heat exchange with the material in punishment in advance chamber 130, and high temperature furnace top gas radiates heat
Material is passed to, making the temperature of material increases, and the material after heating can be entered in body of heater 510 from material outlet 102,
To carry out heating smelting to the metal in body of heater 510.
According to the waste-heat recovery device 100 of the gas-based shaft kiln 500 of the utility model embodiment, by setting the heat exchange He of storehouse 10
Gas passage 140, the high temperature furnace top gas discharged from the exhaust outlet 511 of body of heater 510 can carry out heat with the material in punishment in advance chamber 130
Amount is exchanged, so as to transfer heat to material, the material for entering body of heater 510 is preheated.Thus, the waste heat of top gas is made
Reused, alleviate the pressure of the preheating section of gas-based shaft kiln 500, reached the effect of energy-conserving and environment-protective.Moreover, gas is logical
Road 140 is vertically extending, is conducive to reducing flow resistance of the material in punishment in advance chamber 130, is easy to material in punishment in advance chamber 130
Interior flowing.
According to some embodiments of the present utility model, as shown in figure 1, punishment in advance chamber 130 has along the vertical direction (in such as Fig. 1
Shown above-below direction) diffluence room 150 spaced apart and top gas discharge room 160, diffluence room 150 and top gas entrance 110, gas
The lower end (such as in Fig. 1) of body passage 140 is respectively communicated with, and top gas discharge room 160 exports 120, gas passage 140 with top gas
Upper end is respectively communicated with.
As shown in figure 1, diffluence room 150 can be arranged on the lower section (above-below direction as shown in Figure 1) of punishment in advance chamber 130,
Diffluence room 150 is connected with top gas entrance 110, and top gas can be entered in diffluence room 150 from top gas entrance 110, shunting
Room 150 is connected with the lower end (above-below direction as shown in Figure 1) of gas passage 140, and shunting is entered from top gas entrance 110
Top gas in room 150 can collect in diffluence room 150 and disperse to flow into each gas passage 140.Top gas is discharged
Room 160 is arranged on the top (above-below direction as shown in Figure 1) of punishment in advance chamber 130, and high temperature furnace top gas is along gas passage 140 under
(above-below direction as shown in Figure 1) flows upwards, the top gas in gas passage 140 in flow process with punishment in advance chamber 130
Inside the material of (above-below direction as shown in Figure 1) carries out heat exchange from top to bottom, and the upper end of gas passage 140 is (in such as Fig. 1
Shown above-below direction) connected with top gas discharge room 160, the top gas after heat exchange is pooled to the top gas of top
Room 160 is discharged, finally from the discharge heat exchange storehouse 10 of top gas outlet 120.
Alternatively, as shown in figure 1, being provided with nozzle 170 at the position connected on gas passage 140 with top gas entrance 110,
The diameter of nozzle 170 can be 5mm-10mm.Thus, it is possible to sprayed into top gas to gas passage 140 by nozzle 170,
And the flow direction and flow velocity of top gas can be controlled by nozzle 170, to improve the heat exchanger effectiveness between top gas and material.
In some embodiments of the present utility model, gas passage 140 has expansion segment 141, and gas passage 140 is in expansion
Cross-sectional area at section 141 is S1, and cross-sectional area of the gas passage 140 in the part in addition to expansion segment 141 is S2, wherein S1 ＞
S2.For example, shown in example in Fig. 1, gas passage 140 is vertically extending (above-below direction as shown in Figure 1), gas
Passage 140 could be arranged to the thin cast of middle thick, upper and lower ends.That is, the expansion segment 141 of gas can be arranged on
The middle part of gas passage 140, and expansion segment 141 caliber be more than upper and lower ends at caliber.For example, the caliber of expansion segment 141
The caliber that can be pipe with small pipe diameter section at 50mm-500mm, upper and lower ends can be 20mm-200mm.
It is worth understanding, as shown in figure 1, material inlet 101 is arranged on the top in heat exchange storehouse 10 (as shown in Figure 1
Above-below direction), the height in heat exchange storehouse 10 is 3m-20m, and material can be entered in punishment in advance chamber 130 from material inlet 101.By gas
The caliber of the upper end (above-below direction as shown in Figure 1) of body passage 140 is used compared with pipe with small pipe diameter design, it is possible to reduce gas passage
Interference, the stop of 140 pairs of materials, are easy to material to enter in punishment in advance chamber 130.Similarly, as shown in figure 1, gas passage 140
The caliber of lower end (above-below direction as shown in fig. 1) uses less pipe diameter determing, when material is from the material of heat exchange storehouse 10 lower section
During the outflow heat exchange storehouse 10 of outlet 102, it is possible to reduce interference, stop of the gas passage 140 to material, it is easy to logistics from stream outlet
Outflow heat exchange storehouse 10.Moreover, as shown in figure 1, the bottom wall in heat exchange storehouse 10 is set to circular arc, material outlet 102 is arranged on circular arc
The lowermost end of shape bottom wall, thus, it is possible to further improve the fluency that material flows out punishment in advance chamber 130 from material outlet 102.At this
In other examples of utility model, the bottom wall in the storehouse 10 that exchanges heat is it can also be provided that back taper, to facilitate material from material outlet
102 outflow punishment in advance chambers 130.
Further, as shown in figure 1, the junction between expansion segment 141 and other positions of gas passage 140 is provided with circle
Sliding transition part 142.As shown in fig. 1, the caliber of the top and bottom of gas passage 140 expands less than the pars intermedia of gas passage 140
The caliber of section 141 is opened, and in the pipe with small pipe diameter section and expansion segment of the upper end (above-below direction as shown in Figure 1) of gas passage 140
141 connectivity part, and gas passage lower end (above-below direction as shown in Figure 1) pipe with small pipe diameter section and expansion segment 141
Connectivity part is provided with rounding off portion 142, for example, can be in the upper end pipe with small pipe diameter section of gas passage 140 and intermediate expansions section 141
Processing technology formation rounding off portion 142 of the transition position using rounding is connected, the angle of fillet can be 120 ° -160 °.Class
As, the pipe with small pipe diameter section of the lower end of gas passage 140 is same with 141 junctions of intermediate expansions section can to use the processing of rounding
Technique is formed with rounding off portion 142.Thus, when top gas flows in gas passage 140, rounding off portion 142 can subtract
Resistance of the small top gas when different tube diameters connect out flowing transition, flows so as to add furnace top gas in gas passage 140
Dynamic fluency.
According to some embodiments of the present utility model, gas passage 140 is multiple for what is be spaced apart.As depicted in figs. 1 and 2,
Gas passage 140 is multiple, and (above-below direction as shown in Figure 1) extends multiple gas passages 140 along the vertical direction, and along water
Square it is spaced apart to (left and right directions as shown in Figure 1).For example, gas passage 140 can be arranged at intervals (such as using multiple row
Can be arranged for 3 row -40), it is worth understanding, as shown in Figure 2, it can be understood as along the longitudinal direction (before and after as shown in Figure 2
Direction) it is " row ", (left and right directions as shown in Figure 2) is " OK " in left-right direction.Five row gases are distributed with storehouse 10 in heat exchange
Passage 140, and it is adjacent two row gas passages 140 staggeredly be intervally arranged, thus, it is possible to increase furnace roof in gas passage 140
The circulation of gas, and the heat exchange area of top gas in gas passage 140 is added, so as to improve top gas and material
Between heat exchange efficiency.
Further, the distance between two adjacent gas passages 140 are L, and L is met：50mm≤L≤500mm.Need
Illustrate, described here adjacent " the distance between two gas passages 140 L ", can refer to as shown in Figure 2, together
The distance between adjacent periphery wall of two gas passages 140 L or refer to gas passage in two adjacent row in one row
In 140, the distance between adjacent periphery wall of two gas passages 140 L.By verification experimental verification, when L is met：50mm≤L≤
During 500mm, it can both reduce flow resistance of the material in heat exchange storehouse 10, can make again between top gas and material with higher
Heat exchange efficiency.
Alternatively, distributing device (not shown) is provided with punishment in advance chamber 130 at the position of material inlet 101.Thus,
Material can be made to be evenly distributed in punishment in advance chamber 130 by distributing device, so that material is heated evenly in punishment in advance chamber 130, so that
Further increase the heat exchange efficiency between top gas and material.
According to some embodiments of the present utility model, the upstream of top gas entrance 110 is provided with the adjustable flow control of aperture
Valve.Thus, it is possible to by adjusting flow control valve, control the size of furnace roof throughput.It should be noted that described here
" upstream " can be understood as the upstream understood by flow direction of the top gas in waste-heat recovery device 100.In actual gold
Belong in smelting process, the size of furnace roof throughput can be controlled, between top gas and material according to actual industrial and mineral demand
Heat exchange process accurately controlled, top gas heat is more fully utilized, improve top gas sensible heat utilization rate.
In some embodiments of the present utility model, as shown in figure 1, waste-heat recovery device 100 can also include：Dust is arranged
Go out device 20, dust discharger 20 has gas feed 210, gas vent 220 and a dust outlet 230, gas feed 210 with
The exhaust outlet 511 of body of heater 510 is connected, and gas vent 220 is connected with top gas entrance 110.
It should be noted that contain a large amount of granule foreigns in the top gas discharged from the exhaust outlet 511 of gas-based shaft kiln 500,
After the long-time use of waste-heat recovery device 100, substantial amounts of granule foreign can be attached on the inwall of gas passage 140, influence waste heat
The heat exchange efficiency of retracting device 100.The dust impurities of sedimentation accumulation for a long time can cause gas passage 140, top gas to enter in addition
The blocking of mouth 110, nozzle 170 etc., influences the normal work of waste-heat recovery device 100, or even shorten waste-heat recovery device 100
Service life.By setting dust discharger 20, the granule foreign in top gas can be effectively removed.As shown in figure 1, stove
Top gas enters dust discharger 20 after the discharge of exhaust outlet 511 through gas feed 210, and impurity particle is in dust discharger
Settle and discharged from dust outlet 230 in 20, so as to reduce the impurity content for the top gas for entering heat exchange storehouse 10, effectively dimension
The heat exchange efficiency of waste-heat recovery device 100 has been held, and has effectively extended the service life of waste-heat recovery device 100.
Further, as shown in figure 1, the inner bottom wall 240 of dust discharger 20 is formed as inclined-plane, dust outlet 230 is set
In the bottom (above-below direction as shown in Figure 1) close to inclined-plane.It is understood that by by dust discharger 20
Inner bottom wall 240 is set to inclined-plane, and dust can be made to flow out dust discharger 20 along inclined inner bottom wall 240, and dust goes out
Mouth 230 is arranged on the bottom (above-below direction as shown in Figure 1) on inclined-plane, so as to so that dust is flowed into along inner bottom wall 240
To dust outlet 230.
Further, as shown in figure 1, can be provided with the lower section (above-below direction as shown in Figure 1) of dust outlet 230
Dust hopper 231 and discharge valve 232.Thus, the dust impurities flowed out from dust outlet 230 can sink in dust hopper 231
Product is collected, can be by opening discharge valve 232 by dust impurities when the dust impurities depositing dosed quantities in dust hopper 231
Dust discharger 20 is discharged, to be focused on.
Alternatively, blower fan 250 is provided between gas vent 220 and top gas entrance 110.Thus, it is possible to pass through blower fan 250
Drive the flowing of top gas.For example, shown in Fig. 1, blower fan 250 is provided between gas vent 220 and top gas entrance 110,
Blower fan 250 can enter gas passage 140 with driving gas top gas from top gas entrance 110, with the material in punishment in advance chamber 130
Carry out heat exchange.
According to the gas-based shaft kiln 500 of the utility model embodiment, gas-based shaft kiln 500 includes gas-based shaft kiln described above
500 waste-heat recovery device 100.
According to the gas-based shaft kiln 500 of the utility model embodiment, by setting waste-heat recovery device 100, it is possible to use row
The high temperature furnace top gas gone out preheats to material, alleviates top gas dedusting cooling and the material preheating section of gas-based shaft kiln 500
Pressure, reduces the energy loss of gas-based shaft kiln 500, improves energy utilization rate, energy-conserving and environment-protective.
The gas base according to the utility model embodiment is described in detail with two specific embodiments referring to Fig. 1 and Fig. 2
The waste-heat recovery device 100 of shaft furnace 500.It is worth understanding, it is described below to be merely illustrative rather than new to this practicality
The concrete restriction of type.
Embodiment one：
As depicted in figs. 1 and 2, gas-based shaft kiln 500 includes body of heater 510 and material bin 520, and body of heater 510 is used for iron-bearing material
Reduction, material bin 520 can add thermal source material for body of heater 510, such as material can be acid pellet, to for raw material
Heat is provided in reduction process.It is understood that in reduction process, the top gas of generation has higher temperature, from row
The temperature for the top gas that gas port 511 is discharged is about 450 DEG C.
The heat for the high temperature furnace top gas that waste-heat recovery device 100 can be discharged to gas-based shaft kiln 500 is recycled, with
Improve energy utilization rate, energy-conserving and environment-protective.As depicted in figs. 1 and 2, waste-heat recovery device 100 includes：Exchange heat storehouse 10, dust discharge
Device 20 and multiple gas passages 140.
Wherein, as shown in figure 1, being provided with exhaust outlet 511 in the roof of gas-based shaft kiln 500, high temperature furnace top gas can be from row
Gas port 511 is expelled to outside gas-based shaft kiln 500.Filter 512 is provided with exhaust outlet 511, to carry out preliminary mistake to top gas
Filter.Dust discharger 20 is connected with exhaust outlet 511, as shown in figure 1, dust discharger 20 has gas feed 210, gas
Outlet 220 and dust outlet 230.Wherein, gas feed 210 is connected with the exhaust outlet 511 of body of heater 510, by what is tentatively filtered
Top gas can enter dust discharger 20 from gas feed 210 and carry out further dust removal process.
As shown in figure 1, top gas is entered after dust discharger 20, dust impurities sink in dust discharger 20
Drop.The inner bottom wall 240 of dust discharger 20 is formed as inclined-plane, and the bottom close to inclined-plane is provided with dust outlet 230.Powder
The lower section of dirt outlet 230 is provided with dust hopper 231 and discharge valve 232.As shown in figure 1, dust impurities are in dust discharger 20
The dust outlet 230 of lower section is flowed into after interior sedimentation by inclined-plane inner bottom wall 240, and is accumulated in the dust hopper 231 of lower section
Focused on, finally can be by controlling discharge valve 232 to discharge dust impurities from dust discharger 20.
As shown in figure 1, the top (above-below direction as shown in Figure 1) of dust discharger 20 is provided with gas vent
220, gas vent 220 is connected with airway tube 221.High temperature furnace top gas after dust removal and filtration can be passed through from gas vent 220
The discharge dust of airway tube 221 discharger 20.
As shown in figure 1, the lower section in heat exchange storehouse 10 is provided with top gas entrance 110, top gas entrance 110 is discharged with dust and filled
20 gas outlet connection is put, and blower fan is connected between the gas vent 220 of top gas entrance 110 and dust discharger 20
250.Under the driving effect of blower fan 250, the high temperature furnace top gas for discharging dust discharger 20 from gas vent 220 can be from stove
Top gas entrance 110 is entered in heat exchange storehouse 10.The adjustable flow control valve of aperture is additionally provided with top gas entrance 110, with
The uninterrupted for entering the top gas in heat exchange storehouse 10 is adjusted.
As shown in figure 1, being arranged at intervals with diffluence room 150 and top gas discharge room 160 along the above-below direction in heat exchange storehouse 10.Its
Middle diffluence room 150 is arranged on the lower section in heat exchange storehouse 10, and diffluence room 150 connects with top gas entrance 110, in diffluence room 150
The connectivity part of top gas entrance 110 is provided with nozzle 170.The top of diffluence room 150 is communicated with multiple gas passages 140, multiple
Gas passage 140 is vertically extending, horizontally spaced to set.
Wherein, the distance between adjacent periphery wall of two gas passages 140 is L, L=200mm.As shown in figure 1, gas
The middle part of body passage 140 is provided with expansion segment 141, and the caliber of expansion segment 141 is more than the caliber of upper and lower ends.Gas passage 140
Caliber at expansion segment 141 is 200mm, and gas passage 140 has 20 row.Gas passage 140 upper end pipe with small pipe diameter section with
The junction of expansion segment 141 is provided with rounding off portion 142, and rounding off portion 142 uses the processing technology of rounding, fillet
Angle is 120 ° -160 °.Similarly, it is provided with the pipe with small pipe diameter section of the lower end of gas passage 140 and the junction of expansion segment 141
Same rounding off portion 142.The top of gas passage 140 is connected with top gas discharge room 160, and top gas discharge room 160
Connected with top gas outlet 120.
As shown in figure 1, material bin 520 is arranged on the top in heat exchange storehouse 10.The upper end of material bin 520 is provided with opening 521,
Material can load in material bin 520 from opening 521.The top in heat exchange storehouse 10 is provided with material inlet 101, in material inlet
Distributing device is provided with 101.The lower end of material bin 520 is connected with the material inlet 101 in the storehouse 10 that exchanges heat, and heat exchange had in storehouse 10
Expect chamber 130, the lower end in heat exchange storehouse 10 is provided with material outlet 102.The upper end of punishment in advance chamber 130 is connected with material inlet 101, punishment in advance
The lower end of chamber 130 is connected with material outlet 102, and material outlet 102 is connected with the shaft furnace of lower section.
It should be noted that as shown in figure 1, the material in material bin 520 enters punishment in advance chamber 130 from material inlet 101
Interior, material is a diameter of 6mm-16mm acid pellet to be heated.With the high temperature furnace in gas passage 140 in punishment in advance chamber 130
Top gas carries out heat exchange, temperature rise.Material (temperature is about 441 DEG C) after preheating is entered from material outlet 102
Inside gas-based shaft kiln 500, and the metal in gas-based shaft kiln 500 is smelted by further heating burning.
As shown in figure 1, the high temperature furnace top gas (temperature is 450 DEG C or so) discharged from exhaust outlet 511 first passes around filter
512 are tentatively filtered, and the high temperature furnace top gas after preliminary filtering enters dust discharger 20 from gas feed 210 and removed
Dirt is purified, and insulation material is provided with the furnace wall of dust discharger 20, to be incubated to high temperature furnace top gas.Height after dedusting
The main component of warm top gas is：H2(38.2%), CO (20.0%), CH4(1.9%), H2O (21.0%), CO2(16.4%),
N2(2.5%).High temperature furnace top gas after dedusting discharges dust discharger 20 from gas vent 220.In the work of blower fan 250
Under, high temperature furnace top gas is with 666735Nm3/ h flow is entered from top gas entrance 110 to be collected in diffluence room 150, and is passed through
Nozzle 170 is evenly distributed in each gas passage 140.The high temperature furnace top gas entered in gas passage 140 and punishment in advance chamber 130
Interior material, which will carry out heat, to be changed, and to transfer heat to material, material is preheated.Thus, preheating for top gas is made
Recycling is arrived.Top gas (temperature is reduced to about 150 DEG C) after heat exchange, is pooled to the top gas discharge of top
In room 160, finally from top gas outlet discharge heat exchange storehouse 10.As shown in figure 1, being provided with insulation on the perisporium in heat exchange storehouse 10
Layer 180, to prevent the heat exchanged heat in storehouse 10 to scatter and disappear, causes energy waste.
It is understood that top gas carries out heat friendship along along the flow process from bottom to up of gas passage 140 with material
Change, heat exchange storehouse 10 in different zones temperature and differ.As shown in figure 1, in the heat exchange bottom of storehouse 10, the tubule of gas passage 140
The temperature exchanged heat at the area segments of footpath in storehouse 10 is about 441 DEG C；At the middle part of heat exchange storehouse 10, the area segments of 140 expansion segment of gas passage 141
Temperature in place heat exchange storehouse 10 is 153 DEG C -445 DEG C；Changed at top in heat exchange storehouse 10, the pipe with small pipe diameter area segments of gas passage 140
Temperature in hot storehouse 10 is 30 DEG C -150 DEG C.
Thus, by setting heat exchange storehouse 10 and gas passage 140, the High-temperature furnace top discharged from the exhaust outlet 511 of body of heater 510
Gas can carry out heat exchange with the material in punishment in advance chamber 130, so that material is transferred heat to, the thing to entering body of heater 510
Material is preheated.Thus, reused the waste heat of top gas, alleviate the furnace roof gas washing of gas-based shaft kiln 500 cold
But the pressure of section and preheating section, has reached the effect of energy-conserving and environment-protective.Moreover, gas passage 140 is vertically extending, be conducive to
Reduce flow resistance of the material in punishment in advance chamber 130, be easy to flowing of the material in punishment in advance chamber 130.
Embodiment two：
From unlike embodiment one, in this embodiment, high temperature furnace top gas is flowed into 568767Nm3/h flow and changed
In hot storehouse 10.Gas passage 140 is set to 40 row, and the caliber of the expansion segment 141 of gas passage 140 is 100mm.It is each in heat exchange storehouse 10
The thermo parameters method in region is：In the temperature at the heat exchange bottom of storehouse 10, the pipe with small pipe diameter area segments of gas passage 140 in heat exchange storehouse 10 about
For 443 DEG C；The temperature at heat exchange storehouse 10 middle part, the area segments of 140 expansion segment of gas passage 141 in heat exchange storehouse 10 for 155 DEG C-
448℃；Temperature at top in heat exchange storehouse 10, the pipe with small pipe diameter area segments of gas passage 140 in heat exchange storehouse 10 is 30 DEG C -150 DEG C.
Thus, by increasing the quantity of gas passage 140, the heat exchange area between top gas and material is increased,
Reduce the flow of warm high temperature top gas.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art
The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature can in an appropriate manner be combined in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle of the present utility model and objective, replaced
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (10)
1. a kind of waste-heat recovery device of gas-based shaft kiln, it is characterised in that the gas-based shaft kiln includes body of heater and material bin,
The waste-heat recovery device includes：
Exchange heat storehouse, and the heat exchange storehouse has material inlet, material outlet, top gas entrance and top gas outlet, and the material enters
Mouth is connected with the material bin, and the material outlet is connected with the body of heater, the exhaust of the top gas entrance and the body of heater
There is punishment in advance chamber in mouth connection, the heat exchange storehouse, the punishment in advance chamber is respectively communicated with the material inlet and the material outlet；
With
At least one gas passage, the gas passage is located at the punishment in advance intracavitary, the gas passage two ends and the furnace roof
Gas entrance and top gas outlet are respectively communicated with, and the gas passage is vertically extending.
2. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that the punishment in advance chamber has along upper
Lower direction diffluence room spaced apart and top gas discharge room, the diffluence room and the top gas entrance, the gas passage
Lower end is respectively communicated with, and room is exported with the top gas, the upper end of the gas passage is respectively communicated with for the top gas discharge.
3. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that with institute on the gas passage
State and nozzle is provided with the position of top gas entrance connection.
4. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that the gas passage, which has, to be expanded
Section is opened, cross-sectional area of the gas passage at the expansion segment is S1, and the gas passage is in addition to the expansion segment
Partial cross-sectional area is S2, wherein S1 ＞ S2；
Junction between the expansion segment and other positions of the gas passage is provided with rounding off portion.
5. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that the gas passage is interval
That opens is multiple, and the distance between two adjacent described gas passages are L, and the L is met：50mm≤L≤500mm.
6. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that the punishment in advance intracavitary is close to institute
State and distributing device is provided with the position of material inlet.
7. the waste-heat recovery device of gas-based shaft kiln according to claim 1, it is characterised in that the top gas entrance it is upper
Trip is provided with the adjustable flow control valve of aperture.
8. the waste-heat recovery device of the gas-based shaft kiln according to any one of claim 1-7, it is characterised in that the waste heat
Retracting device also includes：
Dust discharger, the dust discharger has gas feed, gas vent and dust outlet, the gas feed
Connected with the exhaust outlet of the body of heater, the gas vent is connected with the top gas entrance.
9. the waste-heat recovery device of gas-based shaft kiln according to claim 8, it is characterised in that the dust discharger
Inner bottom wall is formed as inclined-plane, and the dust outlet is located at close to the bottom on the inclined-plane, the gas vent and the furnace roof
Blower fan is provided between gas entrance.
10. a kind of gas-based shaft kiln, it is characterised in that more than the gas-based shaft kiln according to any one of claim 1-9
Heat reclamation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720301899.XU CN206607260U (en) | 2017-03-24 | 2017-03-24 | The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720301899.XU CN206607260U (en) | 2017-03-24 | 2017-03-24 | The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln |
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| Publication Number | Publication Date |
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| CN206607260U true CN206607260U (en) | 2017-11-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755695A (en) * | 2017-03-24 | 2017-05-31 | 江苏省冶金设计院有限公司 | The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln |
-
2017
- 2017-03-24 CN CN201720301899.XU patent/CN206607260U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755695A (en) * | 2017-03-24 | 2017-05-31 | 江苏省冶金设计院有限公司 | The waste-heat recovery device and gas-based shaft kiln of gas-based shaft kiln |
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