CN104001853A - Heating device for casting used sand hot method regeneration technology and heating mode of heating device - Google Patents
Heating device for casting used sand hot method regeneration technology and heating mode of heating device Download PDFInfo
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- CN104001853A CN104001853A CN201410282567.2A CN201410282567A CN104001853A CN 104001853 A CN104001853 A CN 104001853A CN 201410282567 A CN201410282567 A CN 201410282567A CN 104001853 A CN104001853 A CN 104001853A
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Abstract
The invention discloses a heating device for the casting used sand hot method regeneration technology and a heating mode of the heating device. The heating device comprises a sand regeneration roasting furnace, a fireproof separation layer is arranged in the sand regeneration roasting furnace and divides the sand regeneration roasting furnace into a bottom combustion chamber and a sand boiling chamber located on the upper portion, the combustion chamber is provided with a combustor opening and a boiling air inlet, a combustor is arranged on the combustor opening, a vent hole is formed in the fireproof separation layer, and a hot air nozzle preventing sand from leaking to the combustion chamber is arranged at the upper end of the vent hole. Even hot air generated by the combustion chamber and used sand are tightly coupled to exchange heat, direction contact of flames and used sand is avoided, uniformity of roasting temperature is achieved, and quality of regenerated sand is guaranteed.
Description
Technical field
The invention belongs to the thermal reclamation technology field of cast used sand, be specifically related to a kind of heater and mode of heating thereof of cast used sand thermal reclamation technique.
Background technology
At present, China is maximum in the world castings production country.According to statistics: every production 1t foundry goods will discharge 1t antiquated sand, and will add 1t fresh sand.Within 2010, Chinese foundry goods total output exceedes 3,500 ten thousand tons.And the present situation of Foundry Works of China is: the old sand discharge capacity of foundry (factory) accounts for solid waste total release first place, reach more than 70%.Therefore, old sand is carried out to regeneration, not only can save valuable fresh sand resource, reduce old sand and abandon the environmental pollution causing, go back escapable cost (purchase commodity of fresh sand and traffic expense), there is huge economic and social benefit.Regenerating used has become the indispensable part of modernization foundry.
Regenerating used is to utilize mechanical type, adds the modes such as thermal bake-out and removes the impurity in old sand, and old sand is recycled.Thermal reclamation is exactly to utilize the mode that adds thermal bake-out to remove the impurity in old sand, and old sand is recycled.The quality of machinery reclaimed sand is stable not, remains in the resin molding of sand grains pit, affects the performance of core sand.On the contrary, thermal reclamation sand steady quality, sand grains pattern rounding, the resin molding of sand grain surface is removed clean, and has eliminated sand grains transformation stress.Therefore, thermal reclamation technology is the main flow of sand processing at present.
But in the old sand thermal reclamation technique of current domestic foundry (factory), it is no matter domestic independent development sand processing technique or by the technique of abroad introducing, the thermal reclamation process of old sand is all to contact with the direct of old sand by flame mostly, burns at organic matters such as the resins on old sand surface.But combustion flame local temperature is too high, enter stove old sand because temperature raises and bursts efflorescence suddenly, increase can not sand using amount.In the time that temperature exceedes certain value, also can cause old sand that irreversible crystalline phase occurs and change, old sand vitreous and conglomeration.Therefore, the direct sand regeneration mode of heating contacting of flame and old sand can have influence on the quality of actual reproduction sand.
Summary of the invention
In view of this, the object of this invention is to provide a kind of directly heater and mode of heating thereof of contact of nonflame of cast used sand thermal reclamation technique, uniform hot blast and old sand close coupling heat exchange that heater of the present invention utilizes combustion chamber to produce, avoid flame to contact with the direct of old sand, can realize the uniformity of sintering temperature, ensure the quality of reclaimed sand.
The object of the invention is to be achieved through the following technical solutions:
A kind of heater of cast used sand thermal reclamation technique, comprise sand regeneration roaster, in described sand regeneration roaster, be provided with fire-resistant interlayer, described fire-resistant interlayer by sand regenerate roaster be separated into be positioned at bottom combustion chamber and superposed sand boiling-house, described combustion chamber is provided with burner opening and boiling wind entrance, described burner opening is provided with burner, on described fire-resistant interlayer, is provided with passage, and described passage upper end is provided with and prevents that hourglass from entering the hot-blast spray nozzle of combustion chamber;
Further, described sand regeneration roaster is L-shaped, and a sidewall of described L shaped sand regeneration roaster is stepped sidewalls, and described burner opening and boiling wind entrance are arranged on the stepped sidewalls of L shaped sand regeneration roaster bottom;
Further, described hot-blast spray nozzle is crown type or fork-shaped;
Further, described hot-blast spray nozzle is arranged on fire-resistant interlayer uniformly;
Further, described hot-blast spray nozzle is made with wear-resisting, exotic material sintering;
Further, described fire-resistant interlayer is formed by the different types of refractory material casting of multilayer;
Further, the lower surface of described fire-resistant interlayer is arch.
Utilize the mode of heating of heater of the present invention to be: first, to utilize boiling wind entrance to introduce boiling wind in combustion chamber; Then, make to seethe with excitement wind with burning hot blast in combustion chamber, evenly mix; Then, utilize hot-blast spray nozzle to spray mixed high-temperature hot-air in sand boiling-house; Finally, when high-temperature hot-air heats sand, make sand zeiosis in stove complete the regenerative process of sand.
The invention has the beneficial effects as follows: uniform hot blast and old sand close coupling heat exchange that the present invention utilizes combustion chamber to produce, avoid flame to contact with the direct of old sand, can realize the uniformity of sintering temperature, ensure the quality of reclaimed sand, the present invention also has following benefit in addition:
1, high-temperature hot-air and old sand mediate contact heating, instead of flame directly contacts, has reduced the efflorescence that bursts of the old sand that causes due to excess Temperature, also can avoid old sand to occur that irreversible crystalline phase changes and conglomeration, has further improved the quality of reclaimed sand.
2, old sand mode with the fluid bed of close coupling in stove heats, in-furnace sand temperature good uniformity, and heat transfer efficiency is high, and the time of old sand processing accelerates, and can improve the output of sand regeneration.
3,, because motion in stove is violent, between sand and sand, rubbing mutually between sand and hot blast, has further strengthened the efficiency of old sand surface organic matter demoulding.
4, because hot blast temperature can be adjusted accordingly according to the kind of processing sand, and sand zeiosis in stove is difficult for conglomeration, substantially can process the casting old sand of all categories.
5, the refractory material platform between old sand boiling-house and combustion chamber is that the different castables of multilayer form, and utilizes the hot expansion property that different castables are different, prevents unified crack and sand leaks to combustion chamber.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized and be obtained by description below.
Brief description of the drawings
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment is only for the present invention is described, instead of in order to limit the scope of the invention.
As shown in the figure, a kind of heater of cast used sand thermal reclamation technique, comprise sand regeneration roaster, it is characterized in that: in described sand regeneration roaster, be provided with fire-resistant interlayer 7, described fire-resistant interlayer by sand regenerate roaster be separated into be positioned at bottom combustion chamber 6 and superposed sand boiling-house 1, described combustion chamber is provided with burner opening and boiling wind entrance 4, described burner opening is provided with burner 5, on described fire-resistant interlayer, be provided with passage 3, described passage upper end is provided with and prevents that hourglass from entering the hot-blast spray nozzle 2 of combustion chamber.
In the present embodiment, hot blast and old sand close coupling heat exchange, avoided flame to contact with the direct of old sand uniformly, can realize the uniformity of sintering temperature, ensures the quality of reclaimed sand.
In the present embodiment, described sand regeneration roaster is L-shaped, and a sidewall of described L shaped sand regeneration roaster is stepped sidewalls, and described burner opening and boiling wind entrance are arranged on the stepped sidewalls of L shaped sand regeneration roaster bottom; The structure of the present embodiment be convenient to seethe with excitement wind with burning hot blast evenly mix
In the present embodiment, described hot-blast spray nozzle is crown type or fork-shaped; Hot-blast spray nozzle is crown type or fork-shaped, can prevent that sand is by the nozzle combustion chamber of bleeding, and in different embodiment, hot-blast spray nozzle can also adopt other to prevent that hourglass from entering the structure of combustion chamber certainly.
In the present embodiment, described hot-blast spray nozzle is arranged on fire-resistant interlayer uniformly; Hot-blast spray nozzle is evenly arranged, and has ensured the uniformity of hot blast ejection, and can not influence each other.
In the present embodiment, described hot-blast spray nozzle is made with wear-resisting, exotic material sintering; Heat resisting temperature is high, and anti-wear performance is good.
In the present embodiment, described fire-resistant interlayer is formed by the different types of refractory material casting of multilayer; Fire-resistant interlayer between old sand boiling-house and combustion chamber is that the different castables of multilayer form, and utilizes the hot expansion property that different castables are different, prevents unified crack and makes sand leak to combustion chamber.
In the present embodiment, the lower surface of described fire-resistant interlayer is arch, and interlayer platform is arch, can bear the old sand of constant weight.
Utilize the mode of heating of the present embodiment heater to be: first, to utilize boiling wind entrance to introduce boiling wind in combustion chamber; Then, make to seethe with excitement wind with burning hot blast in combustion chamber, evenly mix; Then, utilize hot-blast spray nozzle to spray mixed high-temperature hot-air in sand boiling-house; Finally, when high-temperature hot-air heats sand, make sand zeiosis in stove complete the regenerative process of sand.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. the heater of a cast used sand thermal reclamation technique, comprise sand regeneration roaster, it is characterized in that: in described sand regeneration roaster, be provided with fire-resistant interlayer, described fire-resistant interlayer by sand regenerate roaster be separated into be positioned at bottom combustion chamber and superposed sand boiling-house, described combustion chamber is provided with burner opening and boiling wind entrance, described burner opening is provided with burner, on described fire-resistant interlayer, be provided with passage, described passage upper end is provided with and prevents that hourglass from entering the hot-blast spray nozzle of combustion chamber.
2. the heater of cast used sand thermal reclamation technique according to claim 1, it is characterized in that: described sand regeneration roaster is L-shaped, one sidewall of described L shaped sand regeneration roaster is stepped sidewalls, and described burner opening and boiling wind entrance are arranged on the stepped sidewalls of L shaped sand regeneration roaster bottom.
3. the heater of cast used sand thermal reclamation technique according to claim 1, is characterized in that: described hot-blast spray nozzle is crown type or fork-shaped.
4. the heater of cast used sand thermal reclamation technique according to claim 1, is characterized in that: described hot-blast spray nozzle is arranged on fire-resistant interlayer uniformly.
5. the heater of cast used sand thermal reclamation technique according to claim 1, is characterized in that: described hot-blast spray nozzle is made with wear-resisting, exotic material sintering.
6. the heater of cast used sand thermal reclamation technique according to claim 1, is characterized in that: described fire-resistant interlayer is formed by the different types of refractory material casting of multilayer.
7. the heater of cast used sand thermal reclamation technique according to claim 1, is characterized in that: the lower surface of described fire-resistant interlayer is arch.
8. the mode of utilizing the arbitrary described heater of claim 1-7 to heat, is characterized in that: first, utilize boiling wind entrance to introduce boiling wind in combustion chamber; Then, make to seethe with excitement wind with burning hot blast in combustion chamber, evenly mix; Then, utilize hot-blast spray nozzle to spray mixed high-temperature hot-air in sand boiling-house; Finally, when high-temperature hot-air heats sand, make sand zeiosis in stove complete the regenerative process of sand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410282567.2A CN104001853B (en) | 2014-06-20 | 2014-06-20 | Heating device for casting used sand hot method regeneration technology and heating mode of heating device |
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| CN201410282567.2A CN104001853B (en) | 2014-06-20 | 2014-06-20 | Heating device for casting used sand hot method regeneration technology and heating mode of heating device |
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| CN104001853A true CN104001853A (en) | 2014-08-27 |
| CN104001853B CN104001853B (en) | 2017-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361722A (en) * | 2018-04-12 | 2018-08-03 | 江苏新凯跃机械设备有限公司 | A kind of incinerator for recycling roughing sand |
| CN115090829A (en) * | 2022-07-20 | 2022-09-23 | 中航工程集成设备有限公司 | Composite pressure-equalizing structure for making sand particles evenly and stably suspended and sand floating device |
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| JPS5268026A (en) * | 1975-12-03 | 1977-06-06 | Daido Plant Kogyo | Old sand regenerating process |
| SU603481A1 (en) * | 1976-08-16 | 1978-04-25 | Запорожский индустриальный институт | Device for treating material in fluidised bed |
| JPS60174234A (en) * | 1984-02-17 | 1985-09-07 | Nippon Kokan Keishiyu Kk | Regenerating device for molding sand |
| CN2550091Y (en) * | 2002-06-24 | 2003-05-14 | 孙学忠 | Boiling type resin sand thermal regenerating furnace |
| CN102009122A (en) * | 2010-12-09 | 2011-04-13 | 柳州市奥凯工程机械有限公司 | Waste foundry sand regenerating process method |
| CN203155937U (en) * | 2013-04-08 | 2013-08-28 | 于彦奇 | Clay sand hot-method reclaiming machine |
| CN203875275U (en) * | 2014-06-20 | 2014-10-15 | 中机中联工程有限公司 | Heating device of thermal reclamation process of used casting sand |
-
2014
- 2014-06-20 CN CN201410282567.2A patent/CN104001853B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5268026A (en) * | 1975-12-03 | 1977-06-06 | Daido Plant Kogyo | Old sand regenerating process |
| SU603481A1 (en) * | 1976-08-16 | 1978-04-25 | Запорожский индустриальный институт | Device for treating material in fluidised bed |
| JPS60174234A (en) * | 1984-02-17 | 1985-09-07 | Nippon Kokan Keishiyu Kk | Regenerating device for molding sand |
| CN2550091Y (en) * | 2002-06-24 | 2003-05-14 | 孙学忠 | Boiling type resin sand thermal regenerating furnace |
| CN102009122A (en) * | 2010-12-09 | 2011-04-13 | 柳州市奥凯工程机械有限公司 | Waste foundry sand regenerating process method |
| CN203155937U (en) * | 2013-04-08 | 2013-08-28 | 于彦奇 | Clay sand hot-method reclaiming machine |
| CN203875275U (en) * | 2014-06-20 | 2014-10-15 | 中机中联工程有限公司 | Heating device of thermal reclamation process of used casting sand |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361722A (en) * | 2018-04-12 | 2018-08-03 | 江苏新凯跃机械设备有限公司 | A kind of incinerator for recycling roughing sand |
| CN115090829A (en) * | 2022-07-20 | 2022-09-23 | 中航工程集成设备有限公司 | Composite pressure-equalizing structure for making sand particles evenly and stably suspended and sand floating device |
| CN115090829B (en) * | 2022-07-20 | 2023-12-08 | 中航工程集成设备有限公司 | Composite pressure equalizing structure for making sand particles uniformly and stably suspend and sand floating device |
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| CN104001853B (en) | 2017-02-15 |
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