CN103234348A - Vertical suspension firing and horizontal boiling heating large-scale precoated sand regenerating roaster - Google Patents
Vertical suspension firing and horizontal boiling heating large-scale precoated sand regenerating roaster Download PDFInfo
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- CN103234348A CN103234348A CN2013101117107A CN201310111710A CN103234348A CN 103234348 A CN103234348 A CN 103234348A CN 2013101117107 A CN2013101117107 A CN 2013101117107A CN 201310111710 A CN201310111710 A CN 201310111710A CN 103234348 A CN103234348 A CN 103234348A
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Abstract
The invention discloses a vertical suspension firing and horizontal boiling heating large-scale precoated sand regenerating roaster which comprises a vertical suspension firing furnace chamber and a horizontal fluidized bed; the vertical suspension firing furnace chamber is vertically arranged on the horizontal fluidized bed and communicated with the horizontal type fluidized bed; the cross section of the vertical suspension firing furnace chamber is square, four burners are mounted on the square furnace chamber, and the burners show that the center lines of jet flame at four corners are tangent to the same imaginary circle clockwise or anticlockwise along the same edge; the bed bottom of the horizontal fluidized bed is partitioned into a plurality of uniform bottom air distribution bins by partition boards; and an accident treating pipe and a hot air port are arranged on each bottom air distribution bin. According to the invention, not only is the heat efficiency and the regeneration efficiency improved remarkably, but also the emission standards are raised remarkably; and the roaster has the remarkable advantages of high heat efficiency, superior economical efficiency, energy conservation, environmental protection and the like.
Description
Technical field
The invention belongs to the foundry machinery field, be specifically related to a kind of precoated sand regeneration roaster, especially a kind of vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster.
Background technology
China's casting industry adopts the forging type of precoated sand cold core box process and the production method of the high-end foundry goods of near-net-shape, and therefore, the precoated sand use amount is huge, and annual requirement reaches more than 1,000,000 tons.Usually the disposable use of precoated sand, so a large amount of old sands abandons, and the resin that adheres on the old sand slowly evaporates in the atmosphere, and atmospheric environment is caused serious pollution.Along with the development of precoated sand mold technology in the domestic and international casting industry, the application of precoated sand will be increased rapidly in a short time, and because the requirement of environmental protection and energy utilization rate improves constantly, recovery and the highly efficient regeneration of precoated sand are more and more important.
Thermal reclamation is adopted in extensiveization precoated sand regeneration at present usually, namely utilizes roaster to the precoated sand high temperature regeneration.The technology of its regeneration is, at first old sand carried out swing crushing and separates with magnetic, at boiling type regeneration kiln roasting, gets final product reuse through insulation, cooling, screening again after shaking out then.And the burner of employed roaster is installed in out the precoated sand mouth in the present industry, and old precoated sand comes in to heat at ebullated bed after preheating from hopper, regeneration, seldom directly burning of part of precoated sand in heating process.Mainly there are problems such as the thermal efficiency is low, converter life is short, regeneration efficiency is low in this roaster, causes regeneration cost high; Particularly importantly, in use the release of airborne dust, unburnt phenolic resins pyrolysis thing can cause the roaster over-emitting black exhaust, can produce second environmental pollution.
Summary of the invention
The object of the present invention is to provide vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, the flame of four burners of this roaster circle is in the shape of a spiral cut form, precoated sand can realize that in the process of heating suspension spiral falls, not only can significantly improve the thermal efficiency and regeneration efficiency, simultaneously can significantly improve discharge standard, have remarkable advantages such as thermal efficiency height, economy are superior, energy-conserving and environment-protective.
In order to realize the present invention, a kind of vertical suspending burning of the present invention with the technical scheme that horizontal boiling heating large precoated sand regeneration roaster adopts is:
A kind of vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, it comprises vertical suspending burner hearth and horizontal boiling bed; Wherein the vertical suspending burner hearth is vertically set on the horizontal boiling bed, and with horizontal boiling bed UNICOM; The cross section of described vertical suspending burner hearth is square, and at this square burner hearth four burners are housed, this burner shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge, and four secondary blast devices are equipped with in the below of four burners; Adopt dividing plate to be divided into some bottom cloth wind storehouses uniformly at the bottom of the described horizontal boiling bed bed, cloth wind storehouse, every bottom is provided with accident treatment pipe and hot-air mouth.
Above-mentioned vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, the air outlet of described secondary blast device are four jiaos of traditional method of indicating the pronunciation of a Chinese character circle structural configuration.
Above-mentioned vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, the center line that burner shows as four jiaos of jet flames is along clockwise or with along being cut in same imaginary circle counterclockwise, this imagination diameter of a circle with can be according to size of burner hearth and production capacity design.
The bed top of horizontal boiling bed described above is provided with dividing plate, the setting of staggering of the dividing plate on this dividing plate and the cloth wind storehouse, bottom.
Above-mentioned vertical suspending burning all can be regulated according to burner hearth size and production capacity with horizontal boiling heating large precoated sand regeneration roaster, the burning capacity of burner and secondary wind air quantity size.
Vertical suspending burning of the present invention and horizontal boiling heating large precoated sand regeneration roaster, the principle that can significantly improve the thermal efficiency, regeneration efficiency and discharge standard is:
Vertical suspending burner hearth cross section is square, the burner that is installed on the burner hearth shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge, jet flame forms strong cyclone field at section of burner hearth, and transmits downwards as spiral; The precoated sand grain flow of sending into from top to bottom for the treatment of roasting, entrainmented by swirl flame, carry out mutual disturbance and heat transfer, washing away mutually between four jet flames, avoided flame rigidity to reach the front side furnace wall and washed away and burned refractory, the old sand grain flow by the eddy flow uniformly dispersing and with the abundant contact heat-exchanging of flue gas; Because there being excessive air in the burner hearth, under the high temperature phenolic resins pyrolysis of old sand surface attachment and reach ignition point after i.e. burning rapidly; In order further to prolong the old sand particle in the time of staying of high temperature burning zone, guarantee the abundant burning of phenolic resins, the present invention below burner spiral flow field to some extent recession adopted the overfire air devices of four jiaos of traditional method of indicating the pronunciation of a Chinese character circles, the gas-solid flow again eddy flow disturbance of secondary wind to descending, to the redistribution of sand particle and certain suspension effect, thereby prolonged the time of staying of old sand particle in the high-temperature region, promoted the after-flame of resin; High-temperature flue gas baffling, continues to be settled down on the cloth wind storehouse, ebullated bed bottom under the effect of stove tail air-introduced machine, shows as fluidized state under the fluidized wind effect; The precoated sand particle is transported forward at a slow speed under fluidized state, and staggered because of bottom cloth wind storehouse dividing plate and ebullated bed upper baffle plate, then bottom baffles has been regulated the migration velocity of sand, and upper baffle plate has been controlled flow of flue gas; Contact and heat exchange with the hot flue gas of flow-disturbing in the sand grains fluidisation rise process; Being used in combination of two kinds of dividing plates improved gas sand heat exchange efficiency up and down, guaranteed the abundant burning of remaining phenolic resins, reduced exhaust gas temperature, improved the regeneration quality of sand, reduced airborne dust and black smoke.
The place that the present invention is different from existing ebullated bed, roaster is:
Section of burner hearth is square, and burner shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge; The air outlet of secondary blast device is four jiaos of traditional method of indicating the pronunciation of a Chinese character circle structural configuration; The structure difference of ebullated bed.
Vertical suspending burning of the present invention and horizontal boiling heating large precoated sand regeneration roaster, because its thermal efficiency height, can do not blocked by black smoke, and old sand suspension combustion, therefore its power of regeneration can significantly improve, the product of common same specification, power of regeneration can improve more than 1/2nd at least, uses so be particularly suitable for large-scale precoated sand regeneration especially.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is vertical suspending burning of the present invention and horizontal boiling heating large precoated sand regeneration roaster structural representation;
Fig. 2 is vertical suspending burning of the present invention and horizontal boiling heating large precoated sand regeneration roaster A-A schematic diagram.
The specific embodiment
The present invention is further elaborated below in conjunction with embodiment.
Embodiment 1:
As shown in Figure 1, a kind of vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, it comprises vertical suspending burner hearth 1 and horizontal boiling bed 2; Wherein, vertical suspending burner hearth 1 is vertically set on the horizontal boiling bed 2, and with horizontal boiling bed 2 UNICOMs.
As shown in Figure 1 and Figure 2, the cross section of vertical suspending burner hearth 1 is square, and at this square burner hearth four burners 3 are housed, this burner 3 shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge, and four secondary blast devices 4 are equipped with in the below of four burners 3; Adopt dividing plate 5 to be divided into some bottom cloth wind storehouses 6 uniformly at the bottom of 2 of the described horizontal boiling beds, cloth wind storehouse, every bottom 6 is provided with accident treatment pipe 7 and hot-air mouth 8.
As shown in Figure 1, the bed top of horizontal boiling bed 2 is provided with dividing plate 9,6 dividing plate 5 setting of staggering on this dividing plate 9 and the cloth wind storehouse, bottom.
As shown in Figure 2, the air outlet of described secondary blast device 4 is four jiaos of traditional method of indicating the pronunciation of a Chinese character circle structural configuration.
Vertical suspending burning of the present invention and horizontal boiling heating large precoated sand regeneration roaster, during work, old sand is entered by vertical suspending burner hearth 1 top, burner 3 provides thermal source, old sand is in dropping process, because burner 3 shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge, the old sand grain flow by the eddy flow uniformly dispersing and with the abundant contact heat-exchanging of flue gas, there is excessive air in vertical suspending burner hearth 1, under the high temperature phenolic resins pyrolysis of old sand surface attachment and reach ignition point after rapidly i.e. burning; In order further to prolong the old sand particle in the time of staying of high temperature burning zone, guarantee the abundant burning of phenolic resins, below burner 3 spiral flow field to some extent recession adopted the overfire air devices 4 of four jiaos of traditional method of indicating the pronunciation of a Chinese character circles, the gas-solid flow again eddy flow disturbance of secondary wind to descending, to the redistribution of sand particle and certain suspension effect, thereby prolonged the time of staying of old sand particle in the high-temperature region, promoted the after-flame of resin; High-temperature flue gas baffling, continues to be settled down on the cloth wind storehouse, ebullated bed 2 bottom 6 under the effect of stove tail air-introduced machine, and hot-air mouth 8 provides fluidized wind and show as fluidized state under the fluidized wind effect; The precoated sand particle is transported forward at a slow speed under fluidized state, and staggered with top spacer 9 because of cloth wind storehouse, bottom 6 upper spacers 5, then bottom baffles 5 has been regulated the migration velocity of sand, and top spacer 9 has been controlled flow of flue gas; Contact and heat exchange with the hot flue gas of flow-disturbing in the sand grains fluidisation rise process, being used in combination of two kinds of dividing plates improved gas sand heat exchange efficiency up and down, guaranteed the abundant burning of remaining phenolic resins, reduce exhaust gas temperature, improved the regeneration quality of sand, reduced airborne dust and black smoke.
The air quantity size that need to prove the burning capacity of burner 3 and overfire air device 4 all can be regulated according to burner hearth size and production capacity.
Claims (4)
1. vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster, it comprises vertical suspending burner hearth and horizontal boiling bed, it is characterized in that: the vertical suspending burner hearth is vertically set on the horizontal boiling bed, and with horizontal boiling bed UNICOM; The cross section of described vertical suspending burner hearth is square, and at this square burner hearth four burners is housed, and this burner shows as the center line of four jiaos of jet flames along being cut in same imaginary circle counterclockwise clockwise or with the edge; Four secondary blast devices are equipped with in the below of four burners; Adopt dividing plate to be divided into some bottom cloth wind storehouses uniformly at the bottom of the described horizontal boiling bed bed, cloth wind storehouse, every bottom is provided with accident treatment pipe and hot-air mouth.
2. vertical suspending burning according to claim 1 and horizontal boiling heating large precoated sand regeneration roaster is characterized in that: the air outlet of described secondary blast device is four jiaos of traditional method of indicating the pronunciation of a Chinese character circle structural configuration.
3. vertical suspending burning according to claim 1 and horizontal boiling heating large precoated sand regeneration roaster, it is characterized in that: the center line that burner shows as four jiaos of jet flames is along clockwise or with along being cut in same imaginary circle counterclockwise, this imagination diameter of a circle with can be according to size of burner hearth and production capacity design.
4. vertical suspending according to claim 1 burning and horizontal boiling heating large precoated sand regeneration roaster, it is characterized in that: the bed top of described horizontal boiling bed is provided with dividing plate, the setting of staggering of the dividing plate on this dividing plate and the cloth wind storehouse, bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101117107A CN103234348A (en) | 2013-04-02 | 2013-04-02 | Vertical suspension firing and horizontal boiling heating large-scale precoated sand regenerating roaster |
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| CN2013101117107A CN103234348A (en) | 2013-04-02 | 2013-04-02 | Vertical suspension firing and horizontal boiling heating large-scale precoated sand regenerating roaster |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750489A (en) * | 2016-05-09 | 2016-07-13 | 西安合力汽车配件有限公司 | Precoated sand recycling system |
| RU169592U1 (en) * | 2016-05-27 | 2017-03-23 | Александр Валентинович Емельянов | Suspension for firing plates |
| CN110006033A (en) * | 2019-05-05 | 2019-07-12 | 浙江布莱蒙农业科技股份有限公司 | A kind of biomass burner and pig manure low-cost processes system |
| CN111517757A (en) * | 2019-02-01 | 2020-08-11 | 河北勇龙邦大新材料有限公司 | Sintering method and device for hollow ceramic microspheres |
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| CN2259243Y (en) * | 1996-05-30 | 1997-08-13 | 青岛第四铸造机械厂 | Resin bonded sand regenerator for foundry practice use |
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| CN1555941A (en) * | 2004-01-07 | 2004-12-22 | 朱旭东 | Heating device for casting sand |
| US20090126531A1 (en) * | 2005-10-05 | 2009-05-21 | Kenji Takahashi | Method of Roasting Material Containing At Least One of V, Mo and Ni and Rotary Kiln for Roasting the Same |
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| CN203216264U (en) * | 2013-04-02 | 2013-09-25 | 青岛天恒机械有限公司 | Large-scale precoated sand regeneration roaster combining vertical suspension combustion and horizontal boiling heating |
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- 2013-04-02 CN CN2013101117107A patent/CN103234348A/en active Pending
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| CN2259243Y (en) * | 1996-05-30 | 1997-08-13 | 青岛第四铸造机械厂 | Resin bonded sand regenerator for foundry practice use |
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| US20090126531A1 (en) * | 2005-10-05 | 2009-05-21 | Kenji Takahashi | Method of Roasting Material Containing At Least One of V, Mo and Ni and Rotary Kiln for Roasting the Same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750489A (en) * | 2016-05-09 | 2016-07-13 | 西安合力汽车配件有限公司 | Precoated sand recycling system |
| RU169592U1 (en) * | 2016-05-27 | 2017-03-23 | Александр Валентинович Емельянов | Suspension for firing plates |
| CN111517757A (en) * | 2019-02-01 | 2020-08-11 | 河北勇龙邦大新材料有限公司 | Sintering method and device for hollow ceramic microspheres |
| CN110006033A (en) * | 2019-05-05 | 2019-07-12 | 浙江布莱蒙农业科技股份有限公司 | A kind of biomass burner and pig manure low-cost processes system |
| CN110006033B (en) * | 2019-05-05 | 2024-02-27 | 浙江钱江伟岸干燥设备有限公司 | Biomass burner and pig manure low-cost treatment system |
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Application publication date: 20130807 |