阅读说明：本技术 一种铸造旧砂及矿粉焙烧炉 (A kind of cast used sand and smalls roaster ) 是由 李环宇 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种铸造旧砂及矿粉焙烧炉,包括炉体,所述炉体开设有进砂口和出砂口,所述出砂口位于进砂口的下方；换热骨架,所述换热骨架布置于炉体内腔,将炉体内腔分隔形成细长曲折的加热通道；加热单元,所述加热单元用于对换热骨架进行加热。本申请提供的焙烧炉中在炉体内通过箅板支撑堆积有一定料位的蓄热球形成换热骨架,旧砂在蓄热球之间的间隙中下落过程中充分分散开,在下落过程中旧砂吸收蓄热球的热量达到焙烧目的,在有限的空间内大大延长了旧砂的加热时间,提高了旧砂再生效果。而且焙烧炉,热效率高建造成本及维护成本低。(The invention discloses a kind of cast used sand and smalls roaster, including furnace body, the furnace body offers sand inlet and sand export, and the sand export is located at the lower section of sand inlet；Exchange heat skeleton, and the heat exchange skeleton is arranged in furnace body inner cavity, furnace body inner cavity is separated to form to the heating channel of elongated complications；Heating unit, the heating unit are heated for heat exchanging skeleton.Heat exchange skeleton is formed by the heat-storing sphere that the support accumulation of grate plate has certain material position in furnace body in roaster provided by the present application, old sand is fully dispersed in dropping process in the gap between heat-storing sphere to be opened, the heat that old sand absorbs heat-storing sphere in dropping process reaches roasting purpose, the heating time that old sand is substantially prolonged in a limited space, improve regenerating used effect.And roaster, the high construction cost of the thermal efficiency and maintenance cost are low.)

1. a kind of cast used sand and smalls roaster characterized by comprising

Furnace body, the furnace body offer sand inlet and sand export, and the sand export is located at the lower section of sand inlet；

Exchange heat skeleton, and the heat exchange skeleton is arranged in furnace body inner cavity, furnace body inner cavity is separated to form to the heating channel of elongated complications；

Heating unit, the heating unit are heated for heat exchanging skeleton.

2. cast used sand according to claim 1 and smalls roaster, which is characterized in that the heat exchange skeleton includes:

At least one grate plate, the grate plate are set between sand inlet and sand export；

The heat-storing sphere being piled up in above grate plate.

3. cast used sand according to claim 2 and smalls roaster, which is characterized in that the grate plate is by tubulose or rodlike Supporter overlap to be formed, be formed with the gap fallen for old sand on grate plate, the width in the gap is less than the diameter of heat-storing sphere.

4. cast used sand according to claim 2 and smalls roaster, which is characterized in that the diameter of the heat-storing sphere is distributed Range is 5mm-100mm.

5. cast used sand according to claim 2 and smalls roaster, which is characterized in that the heat-storing sphere is intracorporal in furnace Distribution form is the combination of any one or more following form:

The unordered accumulation of the heat-storing sphere of different-diameter；

The unordered accumulation of the heat-storing sphere of close diameter；

Or major diameter heat-storing sphere and minor diameter heat-storing sphere are alternately accumulated from top to bottom.

6. cast used sand according to claim 1 and smalls roaster, which is characterized in that the heating unit is electric heating Any one or more in device, burner.

7. cast used sand according to claim 6 and smalls roaster, which is characterized in that the electric heater includes:

Outer tube is supported, the support outer tube is distributed in furnace body inner cavity；

Set on the electric heating wire of support outer tube bore.

8. cast used sand according to claim 6 and smalls roaster, which is characterized in that in the furnace body below the grate plate Chamber limit goes out combustion chamber, the burner and combustion chamber of the burner.

9. cast used sand according to claim 7 and smalls roaster, which is characterized in that the support outer tube and grate plate Material is silicon carbide, and the grate plate is formed by the tubulose or club shaped structure interlaced arrangement of silicon carbide material.

10. cast used sand according to claim 1 and smalls roaster, which is characterized in that it further include heat preservation trolley, it is described The heating chamber of heat preservation trolley is connected to the sand export.

Technical field

The present invention relates to a kind of cast used sand and smalls roasters, belong to mold material processing equipment technical field.

Background technique

Casting industry will use a large amount of precoated sand, and every one ton of castings of production will generate 1.2 tons or so old sands, fresh sand A large amount of exploitations and old sand largely discharge and bring immense pressure to resource and environment.With the raising of environmental requirement, foundry enterprise pair The demand of old sand recovery and reuse technology is higher and higher.Wherein, cast used sand thermal reclamation technology is high by carrying out to old sand Temperature roasting, makes the coating layer on old sand surface fall off, and realizes the technology of regenerating used reuse.Roaster is cast used sand thermal reclamation The important equipment that technology uses, currently used roaster generally include furnace body, blowing unit and combustor, by sending when work Wind unit makes the intracorporal old sand boiling of furnace, and is heated by combustor to old sand.In order to guarantee that old sand effectively boils dispersion To be sufficiently heated, it is desirable to the intake and exhaust air rate of roaster are very big, lead to roaster overall thermal low efficiency, and energy consumption is high, And the heating time bad control of old sand causes regenerating used effect limited.In addition, structure is complicated for traditional roaster, cause to make Make, maintenance more difficulty higher with installation cost.

It should be noted that above content belongs to the technology category of cognition of inventor, the prior art is not necessarily constituted.

Summary of the invention

It is an object of the invention to solve the problems of prior art, roasted by providing a kind of cast used sand and miberal powder Furnace is burnt, the roaster entirety thermal efficiency can be improved, improve the regeneration effect of old sand.

The invention is characterized in that following technical scheme is attained in that

A kind of cast used sand and smalls roaster, comprising:

Furnace body, the furnace body offer sand inlet and sand export, and the sand export is located at the lower section of sand inlet；

Exchange heat skeleton, and the heat exchange skeleton is arranged in furnace body inner cavity, furnace body inner cavity is separated to form to the heating of elongated complications Channel；

Heating unit, the heating unit are heated for heat exchanging skeleton.

In a preferred embodiment, the heat exchange skeleton includes:

At least one grate plate, the grate plate are set between sand inlet and sand export；

The heat-storing sphere being piled up in above grate plate.

In a preferred embodiment, the grate plate is overlapped and is formed by tubulose or rodlike supporter, is formed on grate plate For the gap that old sand is fallen, the width in the gap is less than the diameter of heat-storing sphere.

In a preferred embodiment, the diameter distribution of the heat-storing sphere is 5mm-100mm.

In a preferred embodiment, the heat-storing sphere is any one or more following shape in the intracorporal distribution form of furnace The combination of formula:

The unordered accumulation of the heat-storing sphere of different-diameter；

The unordered accumulation of the heat-storing sphere of close diameter；

Or major diameter heat-storing sphere and minor diameter heat-storing sphere are alternately accumulated from top to bottom.

In a preferred embodiment, the heating unit is electric heater, any one or more in burner.

In a preferred embodiment, the electric heater includes:

Outer tube is supported, the support outer tube is distributed in furnace body inner cavity；

Set on the electric heating wire of support outer tube bore.

In a preferred embodiment, the furnace body inner cavity below the grate plate limits combustion chamber, the combustion of the burner Burner and combustion chamber.

In a preferred embodiment, the material of the support outer tube and grate plate is silicon carbide, and the grate plate is by silicon carbide The tubulose or club shaped structure interlaced arrangement of material are formed.

In a preferred embodiment, the cast used sand and smalls roaster further include heat preservation trolley, the warm stage The heating chamber of vehicle is connected to the sand export.

The beneficial effect of the application includes but is not limited to:

(1) heat-storing sphere of certain material position is formed by the support accumulation of grate plate in furnace body in roaster provided by the present application Exchange heat skeleton, and old sand is fully dispersed in dropping process in the gap between heat-storing sphere to be opened, and old sand, which absorbs, in dropping process stores The heat of hot-bulb reaches roasting purpose；(2) the heat exchange skeleton of spherical structure and old sand form sphere-contact, and old sand angle of repose is It 30 ° or so, is easily slid on spherical surface, ensure that old sand in the intracorporal mobility of furnace；(3) it is changed in roaster provided by the present application Hot skeleton is other than it can be used traditional burner and heat to heat-storing sphere, moreover it is possible to use Electric heating；(4) the application It does not need powerful blower is arranged in the roaster of offer and old sand is dispersed, the thermal efficiency is high, can reach 70%；(5) originally The elongated complications in gap in the roaster provided between heat-storing sphere are provided, can be fully dispersed to old sand progress, and also old sand flows Property it is good, in a limited space in substantially prolong heating time of old sand, improve regenerating used effect.(6) the application provides Roaster occupy workshop it is small in size, construction cost and maintenance cost are low.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:

Fig. 1 be the invention relates to a kind of embodiment in cast used sand and smalls roaster structural representation Figure；

Fig. 2 be the invention relates to another embodiment in cast used sand and smalls roaster structural representation Figure；

In figure, 100 furnace bodies；200 heat exchange skeletons；400 grate plates；500 heat preservation trolleys；600 thermocouples；700 exhaust outlets；800 Safety valve and service valve；101 sand inlets；102 sand exports；301 electric heaters；302 burners.

Specific embodiment

In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair It is bright to be described in detail.

It needs to illustrate, in the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, this hair It is bright to be implemented using other than the one described here other modes.Therefore, protection scope of the present invention is not by under The limitation of specific embodiment disclosed in face.

As shown in Figures 1 and 2, cast used sand and smalls roaster provided by the present application, including furnace body 100, heat exchange bone Frame 200 and heating unit, heating unit are heated for heat exchanging skeleton 200.Skeleton 200 exchange heat by accumulation of heat material resistant to high temperature Material, which is fired, to be formed, and heat exchange skeleton 200 is arranged in 100 inner cavity of furnace body, and the heating that furnace body inner cavity 100 is separated to form elongated complications is led to Road.

Furnace body 100 offers sand inlet 101 and sand export 102, and sand export 102 is located at the lower section of sand inlet 101, old sand from After sand inlet 101 enters in furnace body 100, flows downward along heating channel, be discharged from sand export 102.Old sand is in heating channel During interior flowing, the heat stored in heat exchange skeleton 200 makes the coating layer on old sand surface gasify and falls off, realizes Regenerating used.

Smooth in order to guarantee to shake out in a wherein embodiment, sand export 102 is preferably directed towards ground setting.

Referring again to FIGS. 1, at least one grate plate 400 is arranged in furnace body in a wherein embodiment, grate plate 400 is set Between sand inlet 101 and sand export 102.When 400 quantity of grate plate is one, it is arranged close to sand export 102.On grate plate 400 Side's accumulation has the heat-storing sphere of certain material position, constitutes heat exchange skeleton 200, and grate plate 400 plays a part of to support heat-storing sphere.It is packed together Each heat-storing sphere between gap formed heating channel.In order to make old sand smooth flow in heat exchange skeleton 200, and guarantee minimum The calcining time of limit, the diameter distribution of heat-storing sphere are ordinarily selected to 5mm-100mm, preferably 10-50mm, the accumulation of heat-storing sphere Material position calcining time as needed determines.

In a wherein embodiment, grate plate 400 is overlapped and is formed by tubulose or rodlike supporter, is formed on grate plate 400 There is the gap fallen for old sand, the width in gap is less than the diameter of heat-storing sphere.In a specific embodiment, grate plate 400 is by carbon The tubulose or rod shaped support body interlaced arrangement of SiClx material are formed.

In a wherein embodiment, the unordered accumulation in furnace body 100 of the heat-storing sphere of different-diameter forms heating channel.

In a wherein embodiment, the unordered accumulation in furnace body 100 of the heat-storing sphere of close diameter forms heating channel.

In a wherein embodiment, major diameter heat-storing sphere and minor diameter heat-storing sphere replace from top to bottom in furnace body 100 Accumulation forms heating channel.

Heat-storing sphere unordered accumulation in furnace body 100, being more advantageous to makes old sand reach turbulent condition in dropping process, improves Dispersibility increases and the contact area of heat-storing sphere and time.

Further, heating unit may be selected to be electric heater 301, any one or more in burner 302.

Referring again to FIGS. 1, specific includes supporting outer tube and being set to support when heating unit is selected as electric heater 301 The electric heating wire of outer tube bore, supporting the material of outer tube and grate plate is to resist the silicon carbide of high temperature, and support outer tube is distributed in furnace body Inner cavity is fixed in furnace body 100, is formed and is protected to electric heating wire.

Referring again to FIGS. 2, the quantity of grate plate 400 is set as two, two grates when heating unit is selected as burner 302 Plate is separately positioned at 100 middle part of furnace body and sand export 102.Furnace body inner cavity below upside grate plate 400 limits burning The burner of room 3021, burner 302 is connected to combustion chamber 3021.Combustor heat source is coal gas, natural gas, heavy oil or other full One of the fuel of sufficient maturing temperature.When heating unit is selected as burner 302, furnace body 100 is preferably split settings, is convenient for Arrangement grate plate simultaneously forms combustion chamber 3021.

In embodiment of above, 400 short distance of grate plate is contacted with heating unit, so in addition to playing support heat-storing sphere Effect except, moreover it is possible to play the role of part heat exchange.

In order to further increase the regeneration effect of old sand, cast used sand and smalls roaster provided by the present application are in sand export Place also sets up heat preservation trolley 500, and sand enters warm stage vehicle 500 after the discharge of furnace body 100, and continuing Heat preservation old sand makes its surface Coating layer gasification fall off.

Can be determined into sand mode according to working condition at sand inlet 102 on furnace body 100, for example helical feed may be selected Machine.In addition, heat-storing sphere is bought by commercialization approach.

When work, heating unit starting, heat exchanging skeleton 200 is heated, and heat exchange skeleton 200 is protected with good accumulation of heat Warm ability, old sand are completed to disperse and be roasted in the accumulation of heat sphere gap dropping process of accumulation, have more and longer migration road Diameter extends the calcining time in furnace body 100.The angle of repose of casting model powder is 30 ° or so, it is not easy to be sent out in accumulation of heat sphere gap Raw accumulation, and mobility enhances old sand at high temperature.

Thermocouple 600 is installed on 100 side wall of furnace body, for detecting temperature in furnace body 100, when thermocouple 600 detects When 100 temperature of furnace body reaches set temperature, usually 300-800 DEG C, it can stop heating, the heat stored using heat exchange skeleton 200 Amount roasting old sand.After thermocouple 600 detects that temperature is too low, signal restarting heating unit heats heat exchange skeleton will be sent 200。

In a wherein embodiment, furnace body 100 is additionally provided with exhaust outlet 700 or safety valve and service valve 800.Furnace Body 100 selects refractory oven, and insulating layer is arranged on the outside.

Certainly, the other forms that also can be selected except heat-storing sphere of heat exchange skeleton 200, such as by accumulation of heat stick in furnace body inner cavity Interlaced arrangement is formed, as long as being capable of forming the heating channel of elongated complications.

In the description of invention, it is to be understood that term " center ", "upper", "lower", "front", "rear", "left", "right", The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom", "inner", "outside", " axial direction ", " radial direction ", " circumferential direction " To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as Limitation of the present invention.

In invention unless specifically defined or limited otherwise, the arts such as term " installation ", " connected ", " connection ", " fixation " Language shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected, can also be communication；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements.For the ordinary skill in the art, may be used To understand the concrete meaning of above-mentioned term in the present invention as the case may be.

Above-mentioned specific embodiment cannot function as limiting the scope of the invention, for the technology people of the art For member, any alternate modification or transformation made to embodiment of the present invention are fallen within the scope of protection of the present invention.

Place is not described in detail by the present invention, is the well-known technique of those skilled in the art of the present technique.