CN102914154B - Boiling fluidizing roasting furnace - Google Patents
Boiling fluidizing roasting furnace Download PDFInfo
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- CN102914154B CN102914154B CN201210360433.9A CN201210360433A CN102914154B CN 102914154 B CN102914154 B CN 102914154B CN 201210360433 A CN201210360433 A CN 201210360433A CN 102914154 B CN102914154 B CN 102914154B
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Abstract
The invention relates to a waste moulding sand or core sand reproducing device, in particular to a boiling fluidizing roasting furnace which comprises a furnace body. The furnace body is internally provided with a distributing heating chamber on the upper part and a roasting heating chamber on the lower part; the wall of the roasting heating chamber is provided with a burner; and the upper part of the distributing heating chamber is provided with a distributing cone. The boiling fluidizing roasting furnace is characterized in that: the bottom of the heating chambers is provided with a heat exchanging area, the burner is arranged above the heat exchanging area, an air collecting chamber with more than one air inlet is fixedly arranged below the furnace body, an air pipe is fixedly arranged on the top wall of the air collecting chamber, the lower end of the air pipe is arranged in the air collecting chamber, and the upper end of the air pipe is arranged in the heat exchanging area and provided with an air hood. The speed of cooling the roasted material is increased under the premise that the energy is fully utilized, so that the work efficiency of the existing waste moulding sand or core sand reproducing device is improved.
Description
Technical field
The present invention relates to a kind of waste molding sand or core sand regenerating equipment, especially a kind of boiling type fluo solid roaster.
Background technology
In various molding sand or core-sand moulding casting technique, all can produce a large amount of waste molding sands or core sand, waste and old type (core) sand complicated component, wide variety, in order to improve the recycling efficiency of waste and old type (core) sand, old sand is all used for moulding and coremaking by nearly all resin sand and tide mould sand manufacturing enterprise after mechanical friction mode regenerates; These processing modes are difficult to remove the coated inert coating of old sand sand grain surface and organic matter, and the regeneration effect reached is limited, cause casting quality reduction, hydraulic performance decline.Old sand is just abandoned by most enterprise after reuse several times, again changes fresh sand, causes environmental pollution and cost to improve.The recovery and reusing and recycling of waste and old type (core) sand; be related to the aspects such as casting cost, resources conservation and environmental protection; along with the raising required casting quality, from the angle of economy and environmental protection, regenerating used has become indispensable part in Foundry Production.
Practice shows, utilizes tide mould sand and resin sand to cast the old sand produced, and adopt thermal reclamation technique can remove organic matter and the inert coating on old sand surface preferably, regeneration effect is better, and waste and old type (core) sand can be made to obtain reuse.Thermal reclamation is, by roaster, old sand is heated to 600-700 DEG C, and to remove the renovation process of the flammable residue in old sand surface, thermal reclamation is good especially to the regeneration effect of organic binder bond sand, but cost is higher, and energy consumption is comparatively large, and its use is subject to certain restrictions.
Along with the production domesticization of Chinese large-sized mechanized equipment, especially in industries such as generating, metallurgy, mine, chemical industry, boats and ships, the foundry goods piece weight of main equipment reaches hundreds of ton, and this just requires that the regeneration treating capacity of waste and old type (core) sand strengthens thereupon.The defect that existing waste and old type (core) the sand recycling equipment ubiquity thermal efficiency is lower, and disposal ability is limited, and treatment effect is general.
Application number be 2010101972375 Chinese patent application disclose a kind of waste molding sand or core reclaim equiment, this equipment comprises fluo solid roaster, the body of heater of fluo solid roaster is provided with roasting charging aperture, roasting discharging opening, air intake passage and air-out passage, the top of fluo solid roaster is provided with sub-sand heater, sub-sand heater comprises sub-sand heating clamber and the sub-sand be arranged in sub-sand heating clamber heats beam and cloth cone, the top of sub-sand heating clamber and bottom opening, cloth cone is arranged on the top open part of sub-sand heating clamber and is fixed on the top of sub-sand heating beam, above sub-sand heating clamber, lower sand hopper is installed, lower sand hopper is bored with cloth and is connected, the bottom opening of sub-sand heating clamber is connected with the roasting charging aperture of fluo solid roaster, the body of heater of fluo solid roaster is connected with fluidized air blower, the smoke exhaust pipe that air inlet and the sub-sand heater top of fluidized air blower are arranged is communicated with, and air inlet that the air outlet of fluidized air blower is arranged with fluo solid roaster bottom, that be communicated with the roasting discharging opening of fluo solid roaster is communicated with, this equipment operationally, by the material (waste molding sand or core) of process to be clean from described lower sand hopper adding apparatus, the material be added into is first through the dispersion of described cloth cone, material after dispersion falls to sub-sand heating beam from the periphery that cloth is bored, disperse further and preheating through sub-sand heating beam, finally fall in described fluo solid roaster, heat under fluidized state.It is pointed out that sub-sand heater is the waste heat coming from fluo solid roaster to the heat needed for heating material, in the course of work, the heat that equipment is discharged constantly leads back in fluo solid roaster and sub-sand heater by fluidized air blower.Be not difficult to find out from its course of work, material processes by the said equipment under fluidized state, utilize the preheating program of waste heat all to add treatment effeciency to material, in addition, utilizes waste heat to carry out the pre-heat treatment to material and also takes full advantage of energy, save resource, reduce cost.
But, above-mentioned waste molding sand or core reclaim equiment still also exist some shortcomings part, first, because the gas entered below it is the residual air through burning of discharging above equipment, therefore the sand grains through roasting below equipment can be made on the one hand to be difficult to cooling, reduce the collection efficiency of the sand grains after to roasting, in other words, although namely the said equipment make use of waste heat, take full advantage of energy, but the collection efficiency but reduced the sand grains processed, be difficult to the operating efficiency improving equipment on the whole, on the other hand, due to the residual air that the gas introduced below equipment is through burning, therefore the combustion-supporting gas (oxygen) also also existed wherein cannot meet the problem of burning needs, the fuel sprayed in burner is made to be difficult to Thorough combustion, cause the waste to resource on the one hand, pollute the environment on the other hand, the utilization of waste heat is lost more than gain, secondly, because the material added in equipment all flows downward from the periphery of cloth cone after the dispersion of described cloth cone, this just makes device interior locate formation one immediately below cloth cone to work blind area, the space of device interior cannot be made full use of, reduce its operating efficiency, moreover, due between lower sand hopper and roaster without filter, therefore the impurity be mingled with in material very likely can destroy the fluidization reaction of equipment bottom, reduces reaction efficiency.Namely still there is inefficient problem in the said equipment.
Summary of the invention
The object of the present invention is to provide a kind of boiling type fluo solid roaster, to accelerate the cooling velocity of the material through roasting under the prerequisite making full use of energy, thus improve the operating efficiency of existing waste molding sand or core reclaim equiment.
In order to solve the problem, boiling type fluo solid roaster of the present invention is by the following technical solutions: boiling type fluo solid roaster, comprise body of heater, there is in described body of heater superposed cloth heating clamber and be positioned at the baking heat room of bottom, the locular wall of baking heat room is provided with burner, the top of cloth heating clamber is provided with cloth cone, it is characterized in that, the bottom of heating clamber is provided with heat exchange zone, described burner is positioned at above heat exchange zone, the below of body of heater is fixedly installed the remittance air chamber comprising more than one air intlet, the roof of remittance air chamber is fixedly installed airduct, the lower end of described airduct is arranged in remittance air chamber, the upper end of airduct is positioned at described heat exchange zone and is provided with blast cap.
Also comprise vomit pipe, described vomit pipe along the vertical direction through converge air chamber and with converge the top of air chamber, diapire and be sealed and matched.
Be provided with protection liner in the baking heat room of described body of heater, between the protection outside wall surface of liner and the internal face of the corresponding position of body of heater, be provided with insulating sandwich.
Described body of heater is provided with the thermocouple for detecting temperature in body of heater.
The upper and lower of described body of heater is respectively provided with access door.
In body of heater in cloth cone below be provided with at least one deck back taper sieve, back taper sifter device have receive from top fall material connect sand mouth.
The sieve aperture of described back taper sieve increases from top to bottom gradually.
Described back taper sieve has two-layer above and set gradually from top to bottom, when being positioned at the height and position of two sieve apertures on two adjacent back taper sieves on the back taper sieve at its place separately and being identical, of being positioned in this two sieve aperture on the back taper sieve of below is greater than another.
Described back taper sieve has two-layer above and set gradually from top to bottom, and the sieve aperture being positioned at below in adjacent two layers back taper sieve is greater than the sieve aperture of being positioned at top.
Because boiling type fluo solid roaster of the present invention is provided with heat exchange zone in the bottom of its heating clamber, burner is positioned at above heat exchange zone, the below of body of heater is fixedly installed the remittance air chamber comprising more than one air intlet, the roof of remittance air chamber is fixedly installed airduct, the lower end of described airduct is arranged in remittance air chamber, and the upper end of airduct is positioned at described heat exchange zone and is provided with blast cap; Therefore, when in the process used, the material (old sand) added in stove is bored through cloth at furnace roof, first heated by the fume afterheat risen in stove, realize heat exchange, meanwhile, old sand is broken up into fluidised form, evenly, slowly enters burner hearth, the further baking heat of the burned device of old sand, surface organic matter burns; Sand grains after roasting, through carrying out heat exchange with the air in airduct, accelerates the cooling of baked grit, convenient collection; Simultaneously, roasting after heat sand adds the air in warm-air pipe, making it become hot-air enters in burner hearth, the old sand of burner hearth is burnt, realize heat exchange, in sum, boiling type fluo solid roaster of the present invention not only can utilize energy fully, and can accelerate cooling, the collection efficiency of treated grit; Under the prerequisite making full use of energy, accelerate the cooling velocity of the material through roasting, thus improve the operating efficiency of existing waste molding sand or core reclaim equiment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment 1 of boiling type fluo solid roaster of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the B-B sectional view of Fig. 1;
Fig. 5 is the C-C sectional view of Fig. 1;
Fig. 6 is the D-D sectional view of Fig. 3.
Detailed description of the invention
The embodiment 1 of boiling type fluo solid roaster of the present invention, as shown in figures 1 to 6, comprise body of heater 11, the top of body of heater 11 is provided with smoke exhaust pipe 12, and smoke exhaust pipe 12 comprises the vertical section and the horizontal segment that be connected vertical with vertical section that are fixed together with body of heater 11, intercommunication between described vertical section and horizontal segment, in addition, the top of vertical section is provided with loading hopper 13, and the discharging opening of loading hopper 13 is communicated with a passage, and the lower end of passage extends in the inner chamber of body of heater 11, there is in the inner chamber of body of heater 11 superposed cloth heating clamber and the baking heat room being positioned at bottom, cloth cone 15 is fixedly installed by support 14 in described cloth heating clamber, the below of cloth cone 15 is provided with back taper sieve 16, in this enforcement, back taper sieve 16 has three layers and arranges successively from top to bottom, sieve aperture wherein on each back taper sieve all increases from top to bottom gradually, when being positioned at the height and position of two sieve apertures on two adjacent back taper sieves on the back taper sieve at its place separately and being identical, one of being positioned in this two sieve aperture on the back taper sieve of below is greater than another, this is to prevent material blockage phenomenon in the process fallen through back taper sieve, in addition, due to the existence of back taper sieve 16, material can be made to be covered with baking heat room when entering baking heat room to the periphery from centre, make full use of the space in baking heat room, improve the operating efficiency of roaster, moreover from the materials that flow down of cloth cone 15 in also more easy uniform fluidisation after three grades of sieved filters of back taper, contribute to next step fluidised formation, protection liner 17 is provided with in baking heat room, protection liner 17 is formed by refractory brick, insulating sandwich 18 is provided with between the internal face of body of heater 11 at baking heat room place and protection liner 17, insulating sandwich 18 can prevent the loss of furnace heat effectively, make full use of energy, in addition, the mid portion of the locular wall of baking heat room is provided with burner 19, burner 19 inlet end is provided with natural gas ratio adjusting valve 20 and combustion air electric butterfly valve 30, in the present embodiment, burner has four, four burners are distributed on the locular wall of baking heat room at sustained height around the center line of body of heater, the center line of each burner is obliquely installed in short transverse and body of heater 11, in the horizontal direction with body of heater 11 in setting angle, the even flame that burner 19 can be made like this to spray be distributed in baking heat room, contribute to the homogeneous heating to material, the bottom of baking heat room is provided with heat exchange zone, the below of heat exchange zone is provided with remittance air chamber 21, the air chamber 21 that converges has air inlet and is connected with air inlet pipe 22 by air inlet, the quantity of air inlet and air inlet pipe 22 can be arranged as required, what the roof of remittance air chamber 21 was fixed is provided with airduct 23, the air inlet of airduct 23 is positioned at lower end, the lower end of airduct 23 is arranged in remittance air chamber, enter baking heat room after the roof of its upper end through remittance air chamber and be provided with blast cap 24, so far airduct forms heat exchanger, when roaster works, entering from blast pipe the cold air converged air chamber enters in baking heat room via airduct, thus with heat through burner and be deposited on the material-heat-exchanging of heat exchange zone, the cooling of material can be accelerated on the one hand, the convenient collection to material, waste heat on the other hand by material heats the air entered in baking heat room, realize recycling of energy, the below of remittance air chamber is provided with discharge bin 25, discharge bin 25 is communicated with baking heat room by vomit pipe 26, vomit pipe 26 runs through along the vertical direction and converges the top of air chamber, diapire being sealed and matched with it, the upper, middle and lower portion of body of heater is respectively equipped with thermocouple 27, in addition, the upper and lower part of body of heater is also respectively equipped with access door 28, middle part is provided with observation window 29.
This roaster operationally, add material (old sand) in stove when furnace roof is bored through cloth, first heated by the fume afterheat risen in stove, realize heat exchange, meanwhile, old sand is broken up into fluidised form, evenly, slowly enters burner hearth, old sand surface organic matter burns, and the burned device of old sand heats further; The temperature of regional in body of heater can be controlled by three layers of thermocouple temperature measurement; Sand grains after roasting carries out heat exchange through airduct and cold air, temperature reduces and drops in discharge bin by vomit pipe, and meanwhile, roasting after heat sand adds the cold air in warm-air pipe, making it become hot-air enters in burner hearth, the old sand of burner hearth is burnt, realizes heat exchange, not only can improve the heat utilization efficiency of equipment, and hot-air can also make old sand reach boiling, agitated conditions in lower furnace portion, make sand temperature even, sufficient combustion, improve regeneration effect.This device structure is exchanged by two levels of thermal, and the heat utilization efficiency of effective raising equipment, reduce cost, and demoulding is effective.
In other embodiment of boiling type fluo solid roaster of the present invention, the back taper sieve described in above-described embodiment 1 only can also have one deck; The slot size of each layer back taper sieve can also be equal, and in such cases, the sieve aperture being positioned at below during adjacent two layers back taper can be made to sieve is greater than the sieve aperture of being positioned at top.
Claims (7)
1. boiling type fluo solid roaster, comprise body of heater, there is in described body of heater superposed cloth heating clamber and be positioned at the baking heat room of bottom, the locular wall of baking heat room is provided with burner, the top of cloth heating clamber is provided with cloth cone, it is characterized in that, the bottom of baking heat room is provided with heat exchange zone, described burner is positioned at above heat exchange zone, combustor air inlet end is provided with natural gas ratio adjusting valve and combustion air electric butterfly valve, the below of body of heater is fixedly installed the remittance air chamber comprising more than one air intlet, the roof of remittance air chamber is fixedly installed airduct, the air inlet of described airduct is positioned at lower end, the lower end of described airduct is arranged in remittance air chamber, the upper end of airduct is positioned at described heat exchange zone and is provided with blast cap, at least one deck back taper sieve is provided with in the below of cloth cone in body of heater, back taper sifter device have receive from top fall material connect husky mouth, the sieve aperture of described back taper sieve increases from top to bottom gradually.
2. boiling type fluo solid roaster according to claim 1, is characterized in that, also comprise vomit pipe, described vomit pipe along the vertical direction through converge air chamber and with converge the top of air chamber, diapire and be sealed and matched.
3. boiling type fluo solid roaster according to claim 1, is characterized in that, is provided with protection liner in the baking heat room of described body of heater, is provided with insulating sandwich between the protection outside wall surface of liner and the internal face of the corresponding position of body of heater.
4. boiling type fluo solid roaster according to claim 1, is characterized in that, described body of heater is provided with the thermocouple for detecting temperature in body of heater.
5. boiling type fluo solid roaster according to claim 1, is characterized in that, the upper and lower of described body of heater is respectively provided with access door.
6. boiling type fluo solid roaster according to claim 1, it is characterized in that, described back taper sieve has two-layer above and set gradually from top to bottom, when being positioned at the height and position of two sieve apertures on two adjacent back taper sieves on the back taper sieve at its place separately and being identical, of being positioned in this two sieve aperture on the back taper sieve of below is greater than another.
7. boiling type fluo solid roaster according to claim 1, it is characterized in that, described back taper sieve has two-layer above and set gradually from top to bottom, and the sieve aperture being positioned at the back taper sieve of below in adjacent two layers back taper sieve is greater than the sieve aperture of the back taper sieve being positioned at top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210360433.9A CN102914154B (en) | 2012-09-25 | 2012-09-25 | Boiling fluidizing roasting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210360433.9A CN102914154B (en) | 2012-09-25 | 2012-09-25 | Boiling fluidizing roasting furnace |
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| CN102914154A CN102914154A (en) | 2013-02-06 |
| CN102914154B true CN102914154B (en) | 2015-03-04 |
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| CN104096794A (en) * | 2013-04-08 | 2014-10-15 | 于彦奇 | Hot reclaimation device for clay sand |
| CN103743236B (en) * | 2014-01-27 | 2015-10-28 | 无锡锡南铸造机械股份有限公司 | The high temperature fluidized bed roaster of waste molding sand two-part |
| CN104275436A (en) * | 2014-09-25 | 2015-01-14 | 金莹铸造材料（天津）有限公司 | Energy-saving type flowing roasting furnace |
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| CN109128015B (en) * | 2018-10-31 | 2020-10-23 | 共享智能铸造产业创新中心有限公司 | Thermal method regenerated fluidization and roasting furnace for test |
| CN109940125A (en) * | 2019-04-27 | 2019-06-28 | 共享智能铸造产业创新中心有限公司 | High production capacity sand thermal reclamation roaster |
| CN112284147A (en) * | 2020-10-29 | 2021-01-29 | 重庆迅华环境技术有限公司 | High-temperature preheating type oxygen-enriched combustion energy-saving emission-reducing system of sand regenerating furnace for casting |
| CN112762714A (en) * | 2020-12-31 | 2021-05-07 | 重庆长江造型材料（集团）股份有限公司 | Combustion control method of fluidized roasting furnace |
| CN112815709A (en) * | 2020-12-31 | 2021-05-18 | 重庆长江造型材料（集团）股份有限公司 | Fluidized roasting method |
| CN112833669B (en) * | 2020-12-31 | 2023-03-24 | 重庆长江造型材料（集团）股份有限公司 | High-efficiency energy-saving thermal cracking furnace |
| CN114130948A (en) * | 2021-12-02 | 2022-03-04 | 南通美莱达科技有限公司 | Method for recycling waste ceramsite sand |
| CN114543505B (en) * | 2022-01-27 | 2024-04-16 | 广西兰科资源再生利用有限公司 | Vertical energy-saving roasting furnace |
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| CN1106131A (en) * | 1993-09-13 | 1995-08-02 | 多尔-奥利费公司 | Firing liquid and gaseous fuels for a circulating fluidized bedreactor |
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