CN103231012A - Method for regeneration of coated sand by spiral suspension flame counter burning - Google Patents
Method for regeneration of coated sand by spiral suspension flame counter burning Download PDFInfo
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- CN103231012A CN103231012A CN2013101117164A CN201310111716A CN103231012A CN 103231012 A CN103231012 A CN 103231012A CN 2013101117164 A CN2013101117164 A CN 2013101117164A CN 201310111716 A CN201310111716 A CN 201310111716A CN 103231012 A CN103231012 A CN 103231012A
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Abstract
The invention discloses a method for regeneration of coated sand by spiral suspension flame counter burning. The method comprises a combustion phase, a spiral suspension burning phase, and a soaking phase. According to the method, old coated sand that enters from a roasting furnace feed inlet directly goes into a burning state, and undergoes top-down counter burning, transmission, perturbance and heat transfer under the effects of flames and second wind. The method has the obvious advantages of high thermal efficiency, economic superiority, energy saving and environmental protection.
Description
Technical field
The invention belongs to the resource environment field, be specifically related to a kind of precoated sand renovation process, the anti-precoated sand renovation process that burns of especially a kind of spiral suspension flame.
Background technology
Usually adopt the thermal reclamation method in precoated sand regeneration field, this method is to adopt roaster that old precoated sand is carried out thermal regeneration.The problem that this method mainly exists is: the one, and old precoated sand from bottom to top burns, and the precoated sand on top can produce flue dust because burning is insufficient, causes the roaster over-emitting black exhaust, is very easy to like this stop up roaster, thereby has reduced the thermal efficiency of roaster; The 2nd, because sand heats for static relatively in the process of heating, be nature disturbance, heat transfer between sand and the sand, regeneration efficiency is low, reclaimed sand of poor quality.
Summary of the invention
The object of the present invention is to provide a kind of thermal efficiency height, regeneration efficiency height, the anti-precoated sand renovation process that burns of the measured a kind of spiral suspension flame of reclaimed sand matter, this method, the old precoated sand of coming in from the roaster charging aperture directly enters fired state, and under flame and secondary wind action spiral suspend from top to bottom instead downwards burn, transmission, disturbance and heat transfer, have remarkable advantages such as thermal efficiency height, economy are superior, energy-conserving and environment-protective.
In order to realize the present invention, the technical solution used in the present invention is as follows:
The anti-precoated sand renovation process that burns of a kind of spiral suspension flame, it comprises combustion phases, spiral suspension combustion stage, soaking zone, wherein:
Burning zone: the combustion chamber of old precoated sand being sent into roaster, four burners of combustion chamber are lighted a fire simultaneously, the center line of burner flame is 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 transmit precoated sand under the screw, make precoated sand from top to bottom burn, disturbance and heat transfer.
Spiral suspension combustion section: 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, burner below spiral flow field to some extent recession to adopt the overfire air device of four jiaos of traditional methods of indicating the pronunciation of a Chinese character circles to send into high-temperature steam combustion-supporting, the old sand again spiral eddy flow disturbance of secondary wind to descending simultaneously, the sand particle is redistributed, and lasting spiral suspension combustion, the after-flame of promotion resin.
Soaking zone: after spiral suspension combustion section, the old sand grain flow continues to be settled down on the air distribution plate of ebullated bed bottom, opens the hot-fluid wind transmission in the wind storehouse of bottom air distribution plate, under the effect of hot-fluid wind transmission, and the mutual rubbing of sand particle, and thoroughly finish regeneration.
The process conditions of above-mentioned burning zone are by existing process conditions.
Above-mentioned spiral suspension combustion section, described high-temperature steam refers to industrial high-temperature steam, air output can suitably be adjusted according to producing needs.
The anti-precoated sand renovation process that burns of a kind of spiral suspension of the present invention flame, at burning zone, old sand can effectively be avoided the inadequate problem of from bottom to top burning for burning from top to bottom; In spiral suspension combustion section, old sand is passive disturbance not only, is in the spiral suspended state all the time simultaneously under the burner flame effect, can effectively prolong the old sand particle in the time of staying of high-temperature region, promotes the after-flame of resin; At soaking zone, the hot-fluid wind transmission makes the mutual rubbing of sand particle, has further accelerated reproduction speed; Therefore, not only can significantly improve the thermal efficiency, regeneration efficiency, the quality of reclaimed sand can be significantly improved simultaneously.
Roaster of the present invention is by name for the patent of applying on the same day with the application: vertical suspending burning and horizontal boiling heating large precoated sand regeneration roaster.
The anti-precoated sand renovation process that burns of a kind of spiral suspension of the present invention flame, the applicant has done finite element analysis, and with the known technology contrast, the thermal efficiency can improve 1 times, and regeneration rate can improve more than 30%, and the complete alternative fresh sand of the sand of regeneration uses.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the anti-precoated sand renovation process process chart that burns of a kind of spiral suspension of the present invention flame;
Fig. 2, Fig. 3 are the anti-used vertical suspending burning of precoated sand renovation process and the horizontal boiling heating large precoated sand regeneration roasters of burning of a kind of spiral suspension of the present invention flame.
The specific embodiment
The present invention is further elaborated below in conjunction with embodiment.
Embodiment 1:
As shown in Figure 1, the anti-precoated sand renovation process that burns of a kind of spiral suspension flame, it comprises combustion phases, spiral suspension combustion stage, soaking zone, wherein:
1, burning zone: the combustion chamber of old precoated sand being sent into roaster, four burners of combustion chamber are lighted a fire simultaneously, the center line of burner flame is 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 transmit precoated sand under the screw, make precoated sand from top to bottom burn, disturbance and heat transfer.
2, spiral suspension combustion section: 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, burner below spiral flow field to some extent recession to have adopted the secondary wind of four jiaos of traditional method of indicating the pronunciation of a Chinese character circles to send into high-temperature steam combustion-supporting, the old sand again spiral eddy flow disturbance of secondary wind to descending simultaneously, the sand particle is redistributed, and lasting spiral suspension combustion, the after-flame of promotion resin.
3, soaking zone: after spiral suspension combustion section, the old sand grain flow continues to be settled down on the air distribution plate of ebullated bed bottom, opens the hot-fluid wind transmission in the wind storehouse of bottom air distribution plate, under the effect of hot-fluid wind transmission, and the mutual rubbing of sand particle, and thoroughly finish regeneration.
As Fig. 2, shown in Figure 3, the anti-precoated sand renovation process that burns of a kind of spiral suspension of the present invention flame, used 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 Fig. 2, shown in Figure 3, 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 air distribution plates 6 uniformly at the bottom of 2 of the described horizontal boiling beds, every bottom air distribution plate 6 is provided with accident treatment pipe 7 and hot-air mouth 8.
As Fig. 2, shown in Figure 3, 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 3, 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.
The burning of this vertical suspending 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 the secondary wind of overfire air device 4 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 ebullated bed 2 bottom air distribution plates 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 bottom air distribution plate 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 (1)
1. anti-precoated sand renovation process that burns of spiral suspension flame, it is characterized in that: it comprises combustion phases, spiral suspension combustion stage, soaking zone:
Burning zone: the combustion chamber of old precoated sand being sent into roaster, four burners of combustion chamber are lighted a fire simultaneously, the center line of burner flame is 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 transmit precoated sand under the screw, make precoated sand from top to bottom burn, disturbance and heat transfer.
Spiral suspension combustion section: 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, burner below spiral flow field to some extent recession to adopt the overfire air device of four jiaos of traditional methods of indicating the pronunciation of a Chinese character circles to send into high-temperature steam combustion-supporting, the old sand again spiral eddy flow disturbance of secondary wind to descending simultaneously, the sand particle is redistributed, and lasting spiral suspension combustion, the after-flame of promotion resin.
Soaking zone: after spiral suspension combustion section, the old sand grain flow continues to be settled down to ebullated bed bottom cloth wind extremely to be gone up, and opens the hot-fluid wind transmission in the wind storehouse of bottom air distribution plate, under the effect of hot-fluid wind transmission, and the mutual rubbing of sand particle, and thoroughly finish regeneration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101117164A CN103231012A (en) | 2013-04-02 | 2013-04-02 | Method for regeneration of coated sand by spiral suspension flame counter burning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101117164A CN103231012A (en) | 2013-04-02 | 2013-04-02 | Method for regeneration of coated sand by spiral suspension flame counter burning |
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| CN103231012A true CN103231012A (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101117164A Pending CN103231012A (en) | 2013-04-02 | 2013-04-02 | Method for regeneration of coated sand by spiral suspension flame counter burning |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841864A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Energy-saving precoated sand fully using waste and preparation method thereof |
| 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 |
Citations (4)
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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 |
| CN1481951A (en) * | 2003-07-14 | 2004-03-17 | 安徽省宁国市耐磨材料总厂 | Hot process regenerative apparatus for tectorial sand using for casting |
| 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 |
-
2013
- 2013-04-02 CN CN2013101117164A patent/CN103231012A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1481951A (en) * | 2003-07-14 | 2004-03-17 | 安徽省宁国市耐磨材料总厂 | Hot process regenerative apparatus for tectorial sand using for casting |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 郭强等: "2000t/h四墙切圆锅炉炉内空气动力场试验研究", 《电站系统工程》, vol. 26, no. 5, 31 October 2010 (2010-10-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104841864A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Energy-saving precoated sand fully using waste and preparation method thereof |
| 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 |