CN2424420Y

CN2424420Y - Microelectrothermal roasting kiln

Info

Publication number: CN2424420Y
Application number: CN 99258360
Authority: CN
Inventors: 孔德凯; 孔喜
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-20
Filing date: 1999-12-20
Publication date: 2001-03-21
Anticipated expiration: 2009-12-20

Abstract

The utility model discloses a microelectrothermal roasting kiln, which is composed of a kiln body, an electrothermal heater, a metal radiation frame, a conveying belt for roasting objects, etc. Because the electrothermal heater uses an electrothermal component and a special heat conduction and heat radiation structure to prevent heat sources appearing high temperature, the utility model can avoid heat damage in the thermal roasting process. Besides, the utility model can shorten the height of a kiln and reduce the power consumption capacity. The utility model can further utilizes the advantages of no microelectrothermal open fire, wave collection and power saving to integrally realize the purposes of power saving, consumption reduction, high quality, long service life of electrothermal components and stable operation. The utility model can replace or improve the feeding type heat kilns, such as biscuit roasting kilns, tobacco thin sheet roasting kilns, etc.

Description

Little electric heating heating-up furnace

The utility model belongs to field of electric heating, particularly external electric heating decline electric heating heating-up furnace and the little electric heating heating-up furnace of in-built electrical hot type.

The electric heating heating-up furnace has purposes widely, extensively relate to food, reconstituted tobacoo, Chinese medicinal tablet, the wood building materials, papermaking, weaving, many fields such as chemical industry, only the domestic food industry just has more than 4,000 of biscuit electric heating heating-up furnace, every capacitance does not wait 200 to 1000KW, every electric heating heating-up furnace all is the electricity-eating tiger of " worthy of the name ", reason is that traditional electric heating heating-up furnace adopts built-in alloy electrothermal tube or far infrared electric heating plate, its heat source temperature reaches about 700 ℃, toasted thing must be accepted thermal radiation at a distance and just can avoid by burned, causes electric heating heating-up furnace space too high and be big power consumption, low-heat is imitated; With the biscuit is example, the electricity charge have surpassed main raw material starch and sugar in the biscuit cost, the present situation that rises steadily along with the commercial power electricity charge, the contradiction that the biscuit price remains high is increasing, in order to reduce power consumption, have the microwave heating-up furnace of the microwave technology of using instead to emerge both at home and abroad, but the new problem of bringing is the equipment cost height, is difficult for baking traditional color grade; Being not only pressing for of enterprise customer from the angle technological transformation heating-up furnace of consumption reduction upgrading, also is that food stops rise in price to adapt to pressing for of market competition; See in recent years and utilize little electric heating (Electric radiant Heating Film) synthetic mica paper element or porcelain tube element or the technological transformation of Electric radiant Heating Film porcelain plate element substitutional alloy electrothermal tube as the baking box electric heat source, there is the tangible thermal source flames of anger to reach economize on electricity upgrading function, adopted synthetic mica paper electrothermic film element as No. 892079703 cubic heat source baking ovens, 95240641.1 number flat electric heating bellows have adopted the ceramics electrothermic film element, all there are two big disadvantages in it: the one, and the power decline rate of electrothermic film element is fast, the 2nd, the electric membranous layer easy burn-out of electrothermic film element, though cause electrothermic film element to use energy-conservation upgrading advantage is arranged in baking box, difficult realization industrialization.

The purpose of this utility model is the structure that discloses a kind of external electrothermal or the little electric heating heating-up furnace of in-built electrical hot type, can realize energy-saving and cost-reducing under stable and long-lived work prerequisite and raising toasted thing grade purpose.

the utility model comprises the external electric heating electric heating heating-up furnace that declines, the built-in electric heating electric heating heating-up furnace that declines, its common trait is by the kiln body, electrothermal heater, the heat dissipation metal frame, the compositions such as roasting thing conveyer belt, wherein the electrothermic film element in electrothermal heater is the porcelain tube electrothermic film element, tubular heat source and the activity of heat dissipation metal frame are matched to disjunctor, first organization plan of the present utility model is the external electric heating electric heating heating-up furnace that declines, it is characterized in that by high temperature heat conduction pipe 1, the heat-insulating material 2 of wrapping on high temperature heat conduction pipe 1, fixing metal heat radiation rack 6 with the heating resisting metal fin, the little electroheat member 7 of cylinder that a pair of semicircle porcelain tube electrothermic film element Hough is synthetic, heating-up furnace housing 8, roller 11 and the roasting thing conveyer belt of roller fixed mount 12 with movable crawler belt 13 compositions, the institutes such as heating-up furnace supporter 14 form, little electroheat member 7 is placed on the termination of the high temperature heat conduction pipe 1 that is positioned at the external below of heating-up furnace, over blanket high temperature heat pipe 1 conducts to rapidly efficient thermal radiation on the interior fixedly heat radiation rack 6 of heating-up furnace makes in heating-up furnace the roasting thing that is placed on the movable crawler belt 13 made from heat proof material roasting by heat at heating-up furnace, crawler belt 13 is along the spacing directed translatory movement of doing to repeat of roller 11, a pair of high temperature heat conduction pipe 1 be tubular heat source relatively from the external preformed hole 9 of kiln to inserting in kiln the circular tube shaped hole and fixing compact integrators that mate of heat radiation rack 6 in fixing heat radiation rack 6, every pair of high temperature heat pipe is the work of " Jiong " word shape to inserting, the length of inserting the high temperature heat conduction pipe fitting in heating-up furnace from preformed hole 9 of this structure is half of the length of fixing heat radiation rack 6, the total length of the high temperature heat conduction pipe fitting in a pair of reeve preformed hole 9 i.e. two high temperature heat conduction pipe fitting sums to insertion heat radiation rack 6 is consistent with the length of heat radiation rack 6, external electric heating narrower at width and that technological temperature is lower declines in the electric heating heating-up furnace, for simplified manufacturing technique, can adopt " " word shape high temperature heat pipe 1 to add the structure of external little electroheat member 7, its insert from preformed hole 9 length of the high temperature heat pipe in heating-up furnace and fixedly heat radiation rack 6 be complementary, also has a kind of external electric heating of more simplifying technique electric heating heating-up furnace that declines, adopt " ︱ " word shape high temperature heat pipe 1 to add the structure of external little electroheat member 7, heat pipe 1 can be arbitrarily above heating-up furnace or below preformed hole 9 insert in circular tube shaped hole in heat radiation rack 6 in kiln and heat radiation rack 6 integrators, (can insert heat pipe 1) preformed hole 9 symmetries are positioned at the top and bottom of heating-up furnace housing, electroheat member 7 is placed in the termination that is exposed at the high temperature heat pipe 1 of heating-up furnace below external, Figure 12 has provided this structural principle, this electrothermal heater structure is except the not too high heating-up furnace of applicable craft temperature, can also intersect layout and use as the thermal source of augmenting that " Jiong " word shape or " " word shape high temperature heat pipe 1 add the heating-up furnace of little electroheat member 7, in the utility model, the least cost preparation method of flange-cooled fixedly heat radiation rack 6 is to adopt hot extrude aluminium technique to extrude interior special-shaped alumina material for the outer tape fin of circular hole, also can adopt the high alum gate structure of various radiating efficiencys, but the diameter that leaves circular tube shaped hole and high temperature heat conduction pipe on heat radiation rack 6 compact coupling integrator just in time, the height design value that heat radiation rack 6 is heat radiation rack 6 from the distance of movable crawler belt 13 can more conventional electric heating heating-up furnace in Distance Shortened 50% left and right between electroheat member and movable crawler belt, the intracavity space of apparent this little electric heating heating-up furnace will linear contraction reach the energy-conservation effect of linearity along with the shortening of distance between heat radiation rack and movable crawler belt, this structure makes electroheat member be easy to install and maintenance, and electroheat member be in the external pollution that neither is subjected to complicated ingredient hot gas in heating-up furnace of heating-up furnace again in not heat affecting heating-up furnace complicated hot gas produce thermal change and can realize the roasting heating of civilization, particularly electric heat source is placed in the external structure of kiln and can gets rid of the fire damage of thermal source to toasted thing, therefore can shorten the kiln height and reach and dwindle the kiln body space and still ensure and even improve the toasted thing grade, thereby realize the roasting purpose of heat energy-saving and cost-reducing and that upgrade, according to the third law of thermodynamics, total area of dissipation of the heat dissipation metal frame 6 of the utility model stationary arrangement metal fin can be more than the several times of conventional electrothermal tube or far infrared plate or electrothermic film element structure, obviously because its thermal radiation efficiency becomes the linear positive relation with area of dissipation and can increase substantially the thermal efficiency, the electrothermic film element that the utility model uses claims again little heating, it is silver electrode 18 rear realizations on two end systems of the composite oxides Electric radiant Heating Film 17 take tin oxide as main body on the outer round surface of the porcelain body 16 of the ceramic dielectric body 16 of the circular tube shaped that can become from the Hough groove 15 of porcelain pipe two semicircular cylinders along line of rabbet joint split or the semicircle tubular directly made is grown, silver electrode 18 is that the silver coating conducting resinl makes by heat ageing, the inner tube surface of the insulation of a pair of semicircle porcelain tube electrothermic film element 16 of little electroheat member 7 can divide and surely work with the solid circle of stainless steel substrates electrode card 19 after being adjacent on high temperature heat conduction pipe 1 by Hough, electrode card 19 is rectangular sheet, the one head has a rectangle hole 20, there is one section arrow gauge 21 other end, using electrode card 19 is that after piercing into arrow gauge 21 in rectangle hole 20, the inverse bending arrow gauge can be tight by the pincers circle around the silver electrode circle 18 fixing methods in location on little electric heating pipe parts 7, individual aperture 22 is arranged on arrow gauge 21, be used for the riveted joint power line, each little electroheat member two end all has electrode card to fix a pair of electrode card fillet of riveting power line is namely all arranged, be used for external power supply respectively, electrode card 19 also can be solid by other Mechanical Method circle with the sheet metal circle, the biend of electric heating membrane pipe element, also insulate in the 2mm scope between silver conductive electrode and two ends, to ensure the electric insulation intensity of little electroheat member 7, the utility model is according to the model of heating-up furnace, parallel equidistant is from paired " Jiong " font high temperature heat pipe or " " font high temperature heat pipe of storing with little electroheat member 7, the watt level of the little electroheat member on each high temperature heat pipe depends on size and each section operating temperature range in heating-up furnace cross section, the power of the little electroheat member 7 on every high temperature heat pipe 1 of conventional coupling can be set in 800W to 3000W scope, little electroheat member of little electric heating heating-up furnace of specific use also can be set less than 800W or greater than 3KW and set, the mean power of little electroheat member of the present utility model, with 15～30W/cm²Set for the best, the mean power of the little electroheat member in the heating-up furnace of specific demand, can be less than 10W/cm²Or greater than 30W/cm²To 60W/cm², the best preparation method of electrothermic film element, can be 88100015.9 referring to the patent No., name is called the patent of invention of " high power semi-conductor electrothermal conversion body and treatment technology thereof ", the high temperature heat conduction pipe that the present invention uses, can be common high temperature heat pipe or inorganic medium superconductive high temperature heat pipe, it is to utilize the filling heat-conducting medium in a kind of inside of heat-conducting medium Transformation Principle and the metal tube that is evacuated, two terminations of heat pipe are stifled with

metal plug

3 and 4 welderings respectively, can be for vacuumizing thin metal pipe in the middle of 5 expression metal plugs, available roll compacting method sealing makes pipe 1 interior maintenance vacuum after being evacuated, second organization plan of the present utility model is the built-in electric heating electric heating heating-up furnace that declines, and it is characterized in that by little electrothermal tube parts 10, metal heat-conduction bar 23, with the heat dissipation metal frame 6 of metal fin, heating-up furnace housing 8, roller 11, roller fixed mount 12, movable crawler belt 13, the institutes such as heating-up furnace supporter 14 form, little electrothermal tube parts 10 by preformed hole 9 insert outside kiln in kiln in fixing heat radiation rack 6 the circular tube shaped hole can with the compact coupling integrators of heat dissipation metal frame 6, the length of little electrothermal tube parts 10 and kiln are wide similar, slightly short and direct heat conducts on heat radiation rack 6 and makes electric heating conduction utilization rate reach the highest but the electric heating section in duct member 10 is than heat radiation rack 6, movable crawler belt 13 be positioned at heat radiation rack 6 below and also with the close together of heat radiation rack, wherein little electrothermal tube parts 10 are all even and fine by 24, one two of a pair of porcelain tube electrothermic film elements, the middle evenly heat-conducting metal rod 23 of thick disjunctor, the insulating barrier 25 that heat penetration is good, thin-wall metal bushing 31, a pair of round porcelain end socket 26 compositions such as grade, the structure of Electric radiant Heating Film parts 10 is two ends that a pair of porcelain tube electrothermic film element 24 is enclosed within heat-conducting metal rod 23, the outside diameter of the interior Circularhole diameter of this porcelain element 24 and two taper ends of metal bar 23 just in time mates, it is above for well that the outside diameter of this porcelain element 24 is slightly less than the internal diameter 4mm of thin-wall metal bushing 31, the diameter of metal bar 23 interludes just in time is complementary with the internal diameter of thin-wall metal bushing 31, the metal bar 23 that two ends have been put Electric radiant Heating Film porcelain tube element 24 inserts in thin-wall metal bushing 31, the inner headed face ceramic dielectric 16 of porcelain tube element 24 insulate, on its periphery, growth has Electric radiant Heating Film 17, there is a pair of creep age distance 34 greater than the wide symmetrical parallel of 2mm the centre of Electric radiant Heating Film 17, Electric radiant Heating Film 17 2 ends are shaped with silver electrode 18, wherein the silver electrode 18 of a coating is separated by creep age distance 34, the silver electrode of this place coating puts in pipe 5 to 8mm and can open plug with the symmetry folder and squeeze pair of electrodes in pipe and draw that flat filament 33 is good to be contacted through counter being coated with in side, other end silver electrode 18 is circle utmost point state, and leave in termination creepage distance of insulation greater than 2mm to ensure electric insulation intensity, make the loop series connection shape structure of 24 one-tenth two semi-circular tubes of porcelain tube electrothermic film element, pair of electrodes is drawn flat filament 33 and can symmetrical be squeezed and put in the same termination of tube elements, its exit is respectively used to start to exchange fire, ground wire, the porcelain tube element 24 and the space between thin-wall metal bushing 31 that are enclosed within on metal bar 23 fill up the good insulation material layer of thermal conductance 25 routine magnesia, two ends of Electric radiant Heating Film parts 10 respectively have a round porcelain end socket 26 to play location and enclosed construction, pair of electrodes is drawn in the flat round hole 27 of flat filament 33 a pair of symmetry on circle thin-walled sheet 29 in circle porcelain end socket 26 and is drawn for external power supply, the outer end of circle porcelain end socket is recessed circular hole, to reduce weight and cost, the inner center of circle porcelain end socket has a convex porcelain flange disk body 32 can put in porcelain tube element 5 to 8mm, dome cylinder 32 tangent with the flat round hole 27 of a pair of symmetry and with the groove of corresponding symmetry make a pair of flat filament of electrode by flat round hole 27 33 fixed by mechanical presses just in time and with anti-good contact of silver electrode layer that is coated with in inlet pipe, after adopting Mechanical Method all to clamp-on in thin-wall metal bushing 31, circle porcelain end socket 26 answer 1mm left and right in indentation 31 utilize the plasticity of thin-wall metal bushing 31 to be zoomed in the termination diameter by mechanical stitch and will justify porcelain end socket 26 location and fix, obviously, the heat of the Electric radiant Heating Film porcelain tube element in this Electric radiant Heating Film parts can be transmitted to rapidly on heat radiation rack 6 and by the large tracts of land radiating fin width on heat radiation rack 6 and be mapped in the heating kiln air on interior outside, this heat conduction and heat radiation mean power of the electric heating membrane pipe element in the Electric radiant Heating Film parts rapidly can be set greatly than conventional electric heating membrane pipe element, reaches 10～20W/cm²Scope is even larger, because the electrical heat energy on electrothermic film element 24 is conducted away rapidly and dispels the heat, makes the electrothermic film element can excess temperature, and its power stability and life-span have obtained guarantee; Figure 11 has provided the structural principle of in-built electrical hot type Electric radiant Heating Film heating-up furnace.

Advantage of the present utility model clearly, at first be in roasting process, the fire damage of the near-infrared radiation ripple that electric heat source sends owing to high temperature or the fire damage of hyperthermia radiation ripple have been avoided, improve the grade of toasted thing, can increase substantially the survival rate of organic nutrition such as amino acid, organized enzyme than conventional heating-up furnace; Its two when being various little electric heat source work all owing to having adopted rational special construction to make rapid heat dissipation and can not cause the thermal source excess temperature, thereby the stability and the service life of having improved element; It three is that effective working volume of heating-up furnace does not improve owing to heat source temperature has the fire damage disadvantage, or can shorten the heating-up furnace height under the prerequisite that ensures output and promptly dwindle the heating-up furnace volume, has not only therefore reduced electricity capacity, and has reduced the heating-up furnace cost; Four to be that technology of the present invention is implemented difficulty little for it, easy to implement with realize, be easy to outside kiln, change electroheat member, realize modular repair or change the power layout of heating-up furnace and power capacity and enlarge the range of application of heating-up furnace; The utility model is not only the roasting consumption reduction of the heat upgrading target that has realized the environmental protection characteristic, and the utility model also can be technological transformation tradition heating kiln and solves the consumption reduction upgrading and extensively contribute.

Fig. 1 is the external electric heating of " Jiong " font electric heating heating-up furnace structural representation that declines;

Fig. 2 is the external electric heating of " " font electric heating heating-up furnace structural representation that declines;

Fig. 3 is the heat dissipation metal frame cross section structure schematic diagram of heat extrusion forming;

Fig. 4 is the structural representation of Hough porcelain tube electrothermic film element in little electroheat member 7;

Fig. 5 is the partial structurtes schematic diagram of little electroheat member 7;

Fig. 6 is the electrode card structural representation on little electroheat member 7;

Fig. 7 is an a pair of high-temperature heat pipe structural representation when becoming the butt joint of " Jiong " font;

Fig. 8 is the structural representation of little electrothermal tube parts 10;

Fig. 9 is the outer side view of circle porcelain end socket 26;

Figure 10 is the structural representation of little electrical heating tube element 24;

Figure 11 is the little electric heating heating-up furnace of an in-built electrical hot type structural representation;

Figure 12 is the external electric heating of " ︱ " font electric heating heating-up furnace structural representation that declines;

Further specify operation principle of the present utility model below in conjunction with accompanying drawing, this little electric heating heating-up furnace is which kind of organization plan no matter, its common trait is that the electrothermic film element heat source temperature of the employed electric heater of heating-up furnace is low, avoid or greatly reduce amino acid, the nutrition of organized enzyme isoreactivity and microcosmic nutrition in the high temperature heat radiation ripple fire damage destruction hot-working object, thereby improved the grade of roasting processing article; This heating-up furnace is not because thermal source has the fire damage disadvantage, thermal source and toasted thing can be more approaching, make kiln height degree to reduce, this measure linearity has been dwindled the space of kiln body, thereby reaches linear purpose of energy saving, the electric conversion rate of the employed little electric heat source of the utility model is high more than 30% than alloy electrothermal material, little heating has the collection wave energy, can shorten roasting process time, from and further realize purpose of saving, obviously, the utlity model has unconventional energy-saving effect; Kiln is external can not to raise along with the kiln temperature rise synchronously the utility model because little electric heat source 7 is in, little again electric heat source 10 has the condition and the area of enough timely heat conduction and heat radiations in the kiln body, can realize that all high temperature or poly-temperature state can not take place little electric heat source, according to the principle of " life-span of Electric radiant Heating Film and its operating temperature are inversely proportional to ", therefore the electrothermic film element that uses in the utility model has the guarantee of parameter work such as long-lived work and firm power.

Claims

1, a kind of little electric heating heating-up furnace is made up of kiln body, electrothermal heater, heat dissipation metal frame, roasting thing conveyer belt, it is characterized in that tubular heat source and the activity of heat dissipation metal frame of forming electrothermal heater are matched to disjunctor, the parallel storing of electrothermal heater; Movable crawler belt on the roasting thing conveyer belt of being made up of roller, roller fixed mount, movable crawler belt is positioned at the below of heat radiation rack, and the more conventional electric heating heating-up furnace of distance of itself and heat radiation rack shortens; Wherein electrothermic film element is the porcelain tube electrothermic film element, its be on growing on the outer surface of the synthetic cylindric porcelain tube of cylindric porcelain tube or a pair of semicircle Hough to realize after the silver electrode on the two end systems of the composite oxides Electric radiant Heating Film of tin oxide, all insulate in the 2mm scope between its inner tube surface, biend, silver-colored conductive electrode and the two ends; The heat dissipation metal frame that wherein has the heating resisting metal fin is the outer tape fin of circular hole in it.

2, little electric heating heating-up furnace according to claim 1, the structure that it is characterized in that little electroheat member is that a pair of semicircle porcelain tube electrothermic film element is placed on the termination of the high temperature heat pipe that is positioned at heating-up furnace body below or outer side-lower, this high temperature heat conduction pipe is " " shape or " ︱ " shape, become conjoined structure in the external pipe hole of inserting heat dissipation metal frame in the kiln of kiln, it is external that the electric heating membrane pipe element is in kiln.

3, little electric heating heating-up furnace according to claim 1, the structure that it is characterized in that little electroheat member by a pair of porcelain tube electrothermic film element be enclosed within one two all even and fine, insert in the thin-wall metal sleeve pipe behind two ends of the middle evenly heat-conducting metal rod of thick disjunctor and be combined into, the all even and fine end of heat-conducting metal rod just in time mates with the inwall of porcelain tube element and contacts, the interlude that the heat-conducting metal rod is evenly thick contacts with the internal diameter coupling of metal sleeve, be enclosed within and be the good dielectric isolation layer of thermal conductance between porcelain tube element on the heat-conducting metal rod and thin metallic tubd, the porcelain tube electrothermic film element becomes the loop cascaded structure of two semicircle pipes, make two ends of little electroheat member respectively have pair of electrodes to draw and be used for external power supply, electrode is put in circle porcelain end socket, circle porcelain end socket be squeezed into be positioned in the thin-wall metal sleeve pipe fixing; This little electroheat member inserts outside kiln in the kiln and becomes conjoined structure in the heat dissipation metal frame, and the electric heating membrane pipe element is in the kiln body.