CN105627741A - Direct conduction energy-saving and environment-friendly nitridation kiln - Google Patents
Direct conduction energy-saving and environment-friendly nitridation kiln Download PDFInfo
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- CN105627741A CN105627741A CN201610160639.5A CN201610160639A CN105627741A CN 105627741 A CN105627741 A CN 105627741A CN 201610160639 A CN201610160639 A CN 201610160639A CN 105627741 A CN105627741 A CN 105627741A
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- kiln body
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- 238000010438 heat treatment Methods 0.000 claims abstract description 71
- 239000011449 brick Substances 0.000 claims abstract description 42
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 229920000742 Cotton Polymers 0.000 claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 8
- 238000013022 venting Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 230000000740 bleeding effect Effects 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000003345 natural gas Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 239000002918 waste heat Substances 0.000 abstract 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 10
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 10
- 229910010271 silicon carbide Inorganic materials 0.000 description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
- F27B9/045—Furnaces with controlled atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
- F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path on or in trucks, sleds, or containers
- F27B9/262—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path on or in trucks, sleds, or containers on or in trucks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
- F27D3/123—Furnace cars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/36—Arrangements of heating devices
- F27B2009/3607—Heaters located above the track of the charge
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
A direct conduction energy-saving and environment-friendly nitridation kiln comprises a main kiln body and an auxiliary kiln body; the main kiln body comprises a steel plate layer, a heat preservation cotton layer and a refractory brick layer, kiln doors are arranged on the front side surface and the rear side surface of the main kiln body, four fire boxes are arranged in the main kiln body and respectively comprise an air extraction channel and an air inlet channel, a heating device is arranged on each of the left side and the right side of the upper part in the main kiln body, a kiln car is arranged between the lower parts of two first refractory brick walls, and nitrogen gas injection pipes and vacuumizing pipes are arranged on each of the left side and the right side of the main kiln body; the auxiliary kiln body comprises an outer kiln body and an inner kiln body, an outer airflow channel is formed between the inner wall of the outer kiln body and the outer wall of the inner kiln body, an inner airflow channel is formed in the inner kiln body, two exhaust holes are formed in the upper part of the right side wall of the outer kiln body, and air extraction holes are formed in the lower part of the right side wall of the inner kiln body. The direct conduction energy-saving and environment-friendly nitridation kiln has the advantages that the production efficiency is high, the heat conduction efficiency is high, the sealing effect is good, the production cost is low, exhaust gas can be re-combusted, waste heat can be recycled, the thermal utilization rate is increased, and the energy conservation and environmental protection effect is realized.
Description
Technical field
The invention belongs to technical field of fire resistant material production, particularly relate to one and direct transfer and lead energy saving and environment friendly nitrogenize kiln.
Background technology
Silicon nitride combined silicon carbide material is a kind of novel high grade refractory, and quality is hard, and Mohs' hardness is about 9, belongs to hardened material, be only second to diamond in non-metallic material, normal temperature strength height, under 1200-1400 DEG C of high temperature, almost keeps intensity and the hardness of time identical with normal temperature, and the highest safe handling temperature can reach 1650-1750 DEG C, thermal expansivity is little, thermal conductivity height, not easily produces thermal stresses, has good thermal shock resistance, it may also be useful to the life-span is long, and high temperature resists compacted ability strong, corrosion-resistant, resistance to extremely cold extremely hot, anti-oxidant, easily makes the satisfactory goods of dimensional precision height. kiln many employings electrical kiln of existing production silicon nitride combined silicon carbide material and shuttle kiln, shuttle kiln kiln car is built case and puts into product blank, and add lid sealing, adopt the mode building case, there is wall thick, heat conduction is slow and takes the shortcomings such as the energy, and after needing to lower the temperature for a long time, people just can enter to take out product, labour intensity is big, repeatedly open top cover, pressure in kiln body is reduced, quality product is not high, therefore the kiln energy consumption of existing production silicon nitride combined silicon carbide material is general higher, capacity usage ratio is low, heat loss is serious, make production cost height, in firing chamber, heat distribution is uneven, make product fraction defective height.
Summary of the invention
The present invention is in order to solve weak point of the prior art, it is provided that a kind of production efficiency height, heat conduction efficiency height, good sealing effect, production cost be low, can make that waste gas burns again, used heat circulation re-uses, improve heat utilization efficiency, direct transferring of energy-conserving and environment-protective leads energy saving and environment friendly nitrogenize kiln.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: direct transfers and leads energy saving and environment friendly nitrogenize kiln, comprise the main kiln body that is arranged on along anterior-posterior horizontal direction on ground and it is arranged on below ground and the secondary kiln body that be positioned at main kiln body side parallel with main kiln body length direction, main kiln body comprises vertical cross section and is rectangle and top, cross section is the steel plate layer of arch structure, insulating cotton layer and fire brick layer, steel plate layer, insulating cotton layer and fire brick layer are from arranging successively outside to inside, on front side of main kiln body, face and rear side are respectively arranged with wicket, the left and right sides of main kiln body front and rear is all vertically installed with the first refractory brickwork that two sides is parallel to each other, first refractory brickwork is upwards successively through fire brick layer, insulating cotton layer and steel plate layer, the arch structure at steel plate layer top is fixedly connected with by joint bolt with the junction of the first refractory brickwork, it is positioned at four angles place correspondence in main kiln body and vertically it is provided with four fire-boxes, each fire-box includes vertically disposed air exhaust duct and uptake, air exhaust duct and uptake are by separating about vertically disposed 2nd refractory brickwork, air exhaust duct is near Zhu Yaoti center, uptake is away from Zhu Yaoti center, left side and the right side of main kiln body internal upper part are respectively equipped with a heating unit, the front-end and back-end of each heating unit respectively with a fire-box on front side of main kiln body and after main kiln body a fire-box of side be connected, two sides first is provided with kiln car between refractory brickwork bottom, two heating units are positioned at both sides above kiln car, on the left of main kiln body and right side is equipped with some nitrogen injection tubes and vacuum-pumping tube, each nitrogen injection tube is all disposed on main kiln body sidewall bottom along anterior-posterior horizontal direction, each vacuum-pumping tube is all disposed in the middle part of main kiln body sidewall along anterior-posterior horizontal direction, all nitrogen injection tubes are all connected with main kiln body inside with vacuum-pumping tube,
Secondary kiln body comprises vertical cross section and is outer kiln body and the inner kiln tube that rectangle and cross section dual-side and limit, top are arch, outer kiln body and inner kiln tube are built into by refractory brick, outer air-flow passage is formed between outer kiln body inwall and inner kiln tube outer wall, interior air-flow passage it is provided with along the longitudinal direction in inner kiln tube, the face, front side of outer kiln body adopts refractory brickwork shutoff, the rear side of inner kiln tube adopts refractory brickwork shutoff, interior air-flow Channel front end is connected with the vacuum fan being located on ground by pipeline, upper inside wall in outer kiln body is provided with interchanger, the connected entrance being connected outer air-flow passage and interior air-flow passage is offered in inner kiln tube left side wall bottom along interval, anterior-posterior horizontal direction, two venting ports have been offered on outer kiln body right side wall top, two venting ports are arranged along interval, anterior-posterior horizontal direction, each venting port outer end is connected to first airflow line, every bar first airflow line has been offered two the first Link Ports along airflow direction, four the first Link Port correspondences are connected with the lower end of the uptake of four fire-boxes by pipeline, inner kiln tube right side wall bottom is offered two and is positioned at the bleeding point below venting port, two bleeding points are arranged along interval, anterior-posterior horizontal direction, each bleeding point outer end is connected to one article of the 2nd airflow line, every article of the 2nd airflow line has been offered two the 2nd Link Ports along airflow direction, four the 2nd Link Ports are corresponding respectively to be connected with the lower end of the air exhaust duct of four fire-boxes by an extraction pipe, it is respectively equipped with a control valve along two extraction pipes of the contiguous vacuum fan in airflow direction.
Heating unit comprises three layers of heating tube all arranged along anterior-posterior horizontal direction, three layers of heating tube distribute from top to bottom, the pipe body composition that every layer of heating tube is arranged by least two coaxial correspondence sealings, adjacent two Guan Tizhong pipe body is plugged in another root pipe body, the equal sealed card in the front-end and back-end of every layer of heating tube is connected to burner brick, between two pipe body junctions, all by high temperature cotton sealing between burner brick and heating tube junction, burner brick is divided into upper and lower two halves and blocks between two halves up and down and connects, each burner brick has been offered two pores respectively, it is respectively equipped with burner and flame-observing hole in the burner brick at every layer of heating tube two ends, with the burner of one end and the equal interval of flame-observing hole and staggered arrangement, it is provided with bracing frame between every layer of heating tube, bracing frame is located on main kiln body inwall away from side, Zhu Yaoti center is fixing, the equal level in bracing frame top and bottom offers the semi-circular recesses suitable with heating tube cylindrical, on each burner brick, one end away from heating tube is equipped with holding device, the air inlet end of each burner is connected to natural gas tube and heating duct, the hot gas outlet of interchanger is connected with the inlet mouth of heating duct.
It is positioned at the holding device on front side of main kiln body and comprises retaining plate, sleeve pipe and strongback, retaining plate is fixedly connected on sleeve pipe front end, compression spring it is provided with in sleeve pipe, retaining plate center has been threaded push bolt, push bolt rear end is fixedly connected with push pedal, push pedal is slidably connected in sleeve pipe, compression spring front end is fixedly connected on side after push pedal, on front side of strongback, center, face is fixedly connected with the preset pieces extending in sleeve pipe, compression spring rear end be enclosed within preset pieces and with strongback on front side of face top press-fit, one end that after strongback, side is fixedly connected on burner brick away from heating tube.
Kiln car comprises horizontally disposed upper backup pad and lower supporting plate, four angles place correspondence of upper backup pad lower surface is provided with fixed block, each fixed block lower surface is all arranged in low dip after front height, lower supporting plate front and rear is fixedly connected with axletree along left and right horizontal direction respectively, each both ends, axletree left and right is all rotatably connected to heightens wheel, each is heightened all corresponding lower surface rolling with a fixed block in wheel top and is connected, axletree is rotatably connected to the wheel being positioned at each and heightening wheel outside, wheel rolling is connected to and is located on the track on ground along anterior-posterior horizontal direction, upper backup pad front center is provided with Power Drive Unit, Power Drive Unit comprises body skin, worm gear, worm screw and leading screw, upper backup pad front end center is provided with bearing support, leading screw is horizontally disposed with along the longitudinal direction and leading screw rear end is rotatably connected in bearing support, worm gear is positioned at body skin, leading screw is through worm gear center and is threaded with worm gear, worm screw vertically extend in body skin and with worm gear engaged transmission, on front side of body skin, limited location groove is all vertically offered in face and rear side, the spacing groove of leading screw on body skin, lower supporting plate front end has been horizontally disposed with web plate, web plate upper surface it is fixedly connected on bottom body skin.
Refractory brickwork bottom, every face first is provided with steel bracing plate, it is located at bottom steel bracing plate on ground, each steel bracing plate upper end has all offered groove along the longitudinal direction, the upper backup pad left and right sides is stretched into from front to back respectively in a groove, the contact surface of upper backup pad sidepiece bottom surface and bottom portion of groove is the inclined-plane being parallel to each other, the bottom of groove is provided with elasticity refractory support, upper backup pad upper surface is equipped with the thermofin being built into by refractory brick, upper backup pad forward edge and posterior edges are provided with simultaneously heat insulation for fire door insulated wall all in left-right direction, every face first refractory brickwork is positioned at and above upper backup pad, is provided with the first projection, two ends, thermofin left and right are equipped with the 2nd projection, each the 2nd projection lower surface is corresponding to a first projection upper surface running fit with side.
Adopting technique scheme, tool of the present invention has the following advantages:
1, the kiln car of the present invention is in use, first on the upper backup pad of kiln car, lay the thermofin being built into by refractory brick, silicon nitride combined silicon carbide product blank to be processed is placed on thermofin, kiln car enters in main kiln body by track, the upper backup pad two ends of kiln car are inserted in the groove that bracing members is lived, rotated by driven by motor worm screw, worm gear wheel also drives leading screw to be moved down by the spacing groove on body skin along worm screw, owing to leading screw is threaded with worm gear, worm gear wheel makes leading screw promote upper backup pad to move backward, heighten and take turns the hypotenuse structure rolls forward along fixed block, so that upper backup pad falls, upper backup pad contacts with the bottom portion of groove of steel bracing plate and forms inclined-plane cooperation, thus form sealing, then wicket is shut, vacuum pump is connected by the import of pipeline with vacuum-pumping tube pipe, start vacuum pump to vacuumize in main kiln body, when silicon nitride combined silicon carbide product blank is after roasting, reversed by driven by motor worm screw, worm gear is rotated backward and drives leading screw to be moved up by the spacing groove on body skin along worm screw, owing to leading screw is threaded with worm gear, worm gear reversion makes leading screw pull upper backup pad to move forward, thus heighten the hypotenuse structure taken turns along fixed block and roll backward, so that upper backup pad rises, kiln car is pulled out, the present invention is easy and simple to handle, reduces operation easier so that production efficiency is improved,
2, the present invention is in the process of roasting, the gas mixture of Sweet natural gas and air light through burner and to flame in heating tube, temperature around heating tube is raised to and reaches preset temperature, by nitrogen injection tube to nitrogen injection in main kiln body, silicon nitride combined silicon carbide product blank on kiln car is between the heating unit on both sides, thus start roasting, in the process of roasting, open vacuum fan by the high-temp waste gas run out of around heating unit through air exhaust duct and pipeline, the 2nd airflow line is entered into from the 2nd Link Port, enter in the outer air-flow passage of secondary kiln body by bleeding point, through interchanger effect, high-temp waste gas in outer air-flow passage enters the first airflow line through venting port, enter in uptake through the first Link Port and pipeline, formation high temperature gas flow plays and adds heat effect, whole process is a process constantly circulated, waste gas can be made full use of, make used heat recycle again, improve heat utilization efficiency, reduce production cost, the flow of air-flow along two extraction pipes of the contiguous vacuum fan in airflow direction can be entered so that entering the air flow rate in four extraction pipes respectively identical, used heat circulation keeps balance so that the temperature in main kiln body is more stable by control valve control,
3, the present invention is in whole roasting process, owing in main kiln body, temperature is very high, heating tube can expand, or after roasting terminates, in main kiln body, temperature is reduced by height, heating tube can be made to shrink, now by the push bolt that turns on holding device thus promote strongback to hold out against burner brick and extrude heating tube so that heating unit is more stable; It is provided with heating unit in the left side of main kiln body internal upper part and right side, and heating unit is all set to three layers of heating tube, adopts said structure heat conduction efficiency height so that in main kiln body, temperature distribution is more even so that the temperature remained constant in main kiln body.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation at main kiln body front portion or rear portion in the present invention;
Fig. 3 is the structural representation of secondary kiln body in the present invention;
Fig. 4 is lateral cross section sectional view in the middle part of main kiln body in the present invention;
Fig. 5 is the side-looking structural representation of main kiln body in the present invention;
Fig. 6 is the plan structure schematic diagram of main kiln body in the present invention;
Fig. 7 is the structural representation of holding device in the present invention;
Fig. 8 is the structural representation of kiln car in the present invention;
Fig. 9 is the side-looking structural representation of kiln car in the present invention.
Embodiment
As shown in figs 1-9, energy saving and environment friendly nitrogenize kiln is led in direct transferring of the present invention, comprise the main kiln body 59 that is arranged on along anterior-posterior horizontal direction on ground 54 and it is arranged on the secondary kiln body 60 being positioned at main kiln body 59 side below ground 54 and parallel with main kiln body 59 length direction, main kiln body 59 comprises vertical cross section and is rectangle and top, cross section is the steel plate layer 1 of arch structure, insulating cotton layer 2 and fire brick layer 3, steel plate layer 1, insulating cotton layer 2 and fire brick layer 3 are from arranging successively outside to inside, on front side of main kiln body 59, face and rear side are respectively arranged with wicket, the left and right sides of main kiln body 59 front and rear is all vertically installed with the first refractory brickwork 4 that two sides is parallel to each other, first refractory brickwork 4 is upwards successively through fire brick layer 3, insulating cotton layer 2 and steel plate layer 1, the arch structure at steel plate layer 1 top is fixedly connected with by joint bolt 5 with the first refractory brickwork 4, it is positioned at four angles place correspondence in main kiln body 59 and vertically it is provided with four fire-boxes, each fire-box includes vertically disposed air exhaust duct 6 and uptake 7, separated by vertically disposed 2nd refractory brickwork about 8 between air exhaust duct 6 and uptake 7, air exhaust duct 6 is near main Yao Ti 59 center, uptake 7 is away from main Yao Ti 59 center, left side and the right side of main kiln body 59 internal upper part are respectively equipped with a heating unit 9, the front-end and back-end of each heating unit 9 are connected with a fire-box of side after a fire-box on front side of main kiln body 59 and main kiln body 59 respectively, two sides first is provided with kiln car 10 between refractory brickwork 4 bottom, two heating units 9 are positioned at both sides above kiln car 10, on the left of main kiln body 59 and right side is all connected with some nitrogen injection tubes 64 and vacuum-pumping tube 65, each nitrogen injection tube 64 is all disposed on main kiln body 59 lower sidewall along anterior-posterior horizontal direction, each vacuum-pumping tube 65 is all disposed in the middle part of main kiln body 59 sidewall along anterior-posterior horizontal direction, all nitrogen injection tubes 64 are all connected with main kiln body 59 inside with vacuum-pumping tube 65,
Secondary kiln body 60 comprises vertical cross section and is outer kiln body 11 and the inner kiln tube 12 that rectangle and cross section dual-side and limit, top are arch, outer kiln body 11 and inner kiln tube 12 are built into by refractory brick, outer air-flow passage 13 is formed between outer kiln body 11 inwall and inner kiln tube 12 outer wall, interior air-flow passage 14 it is provided with along the longitudinal direction in inner kiln tube 12, the face, front side of outer kiln body 11 adopts refractory brickwork shutoff, the rear side of inner kiln tube 12 adopts refractory brickwork shutoff, interior air-flow passage 14 front end is connected with the vacuum fan being located on ground 54 by pipeline, upper inside wall in outer kiln body 11 is provided with interchanger 15, the connected entrance 16 being connected outer air-flow passage 13 and interior air-flow passage 14 is offered in inner kiln tube 12 left side wall bottom along interval, anterior-posterior horizontal direction, two venting ports 17 have been offered on outer kiln body 11 right side wall top, two venting ports 17 are arranged along interval, anterior-posterior horizontal direction, each venting port 17 outer end is connected to first airflow line 18, every bar first airflow line 18 has been offered two the first Link Ports 19 along airflow direction, four the first Link Port 19 correspondences are connected with uptake 7 times ends of four fire-boxes by pipeline, inner kiln tube 12 right side wall bottom is offered two and is positioned at the bleeding point 20 below venting port 17, two bleeding points 20 are arranged along interval, anterior-posterior horizontal direction, each bleeding point 20 outer end is connected to one article of the 2nd airflow line 21, every article of the 2nd airflow line 21 has been offered two the 2nd Link Ports 22 along airflow direction, four the 2nd Link Ports 22 are corresponding respectively to be connected with air exhaust duct 6 times ends of four fire-boxes by an extraction pipe 61, it is respectively equipped with a control valve 23 along two extraction pipes 61 of the contiguous vacuum fan in airflow direction.
Heating unit 9 comprises three layers of heating tube 24 all arranged along anterior-posterior horizontal direction, three layers of heating tube 24 distribute from top to bottom, every layer of heating tube 24 seals, by least two coaxial correspondences, the pipe body 62 arranged and forms, in adjacent two pipe bodies 62, a pipe body 62 is plugged in another root pipe body 62, the equal sealed card in the front-end and back-end of every layer of heating tube 24 is connected to burner brick 25, between two pipe body 62 junctions, all by cotton 26 sealings of high temperature between burner brick 25 and heating tube 24 junction, burner brick 25 is divided into upper and lower two halves and blocks between two halves up and down and connects, each burner brick 25 has been offered two pores 27 respectively, burner 28 and flame-observing hole 29 it is respectively equipped with in the burner brick 25 at every layer of heating tube 24 two ends, with burner 28 and flame-observing hole 29 all interval and staggered arrangement of one end, it is provided with bracing frame 30 between every layer of heating tube 24, bracing frame 30 is located on main kiln body 59 inwall away from side, main Yao Ti 59 center is fixing, the equal level in bracing frame 30 top and bottom offers the semi-circular recesses suitable with heating tube 24 cylindrical, on each burner brick 25, one end away from heating tube 24 is equipped with holding device 31, the air inlet end of each burner 28 is connected to natural gas tube 32 and heating duct 33, the hot gas outlet of interchanger 15 is connected with the inlet mouth of heating duct 33.
It is positioned at the holding device 31 on front side of main kiln body 59 and comprises retaining plate 34, sleeve pipe 35 and strongback 36, retaining plate 34 is fixedly connected on sleeve pipe 35 front end, compression spring 37 it is provided with in sleeve pipe 35, retaining plate 34 center has been threaded push bolt 38, push bolt 38 rear end is fixedly connected with push pedal 39, push pedal 39 is slidably connected in sleeve pipe 35, compression spring 37 front end is fixedly connected on the rear side of push pedal 39, on front side of strongback 36, center, face is fixedly connected with the preset pieces 40 extending in sleeve pipe 35, compression spring 37 rear end be enclosed within preset pieces 40 and with strongback 36 on front side of face top press-fit, one end that after strongback 36, side is fixedly connected on burner 28 brick 25 away from heating tube 24.
Kiln car 10 comprises horizontally disposed upper backup pad 41 and lower supporting plate 42, four angles place correspondence of upper backup pad 41 lower surface is provided with fixed block 43, each fixed block 43 lower surface is all arranged in low dip after front height, lower supporting plate 42 front and rear is fixedly connected with axletree 44 along left and right horizontal direction respectively, each axletree about 44 both ends is all rotatably connected to heightens wheel 45, each is heightened all corresponding lower surface rolling with a fixed block 43 in wheel 45 tops and is connected, axletree 44 is rotatably connected to be positioned at each heighten wheel 45 outside wheel 46, wheel 46 rolls to be connected to and is located on the track 47 on ground 54 along anterior-posterior horizontal direction, upper backup pad 41 front center is provided with Power Drive Unit, Power Drive Unit comprises body skin 48, worm gear 49, worm screw 50 and leading screw 51, upper backup pad 41 front end center is provided with bearing support 52, leading screw 51 is horizontally disposed with along the longitudinal direction and leading screw 51 rear end is rotatably connected in bearing support 52, worm gear 49 is positioned at body skin 48, leading screw 51 is through worm gear 49 center and is threaded with worm gear 49, worm screw 50 vertically extend in body skin 48 and with worm gear 49 engaged transmission, on front side of body skin 48, limited location groove is all vertically offered in face and rear side, the spacing groove of leading screw 51 on body skin 48, lower supporting plate 42 front end has been horizontally disposed with web plate 53, web plate 53 upper surface it is fixedly connected on bottom body skin 48.
Refractory brickwork 4 bottom, every face first is provided with steel bracing plate 55, it is located on ground 54 bottom steel bracing plate 55, each steel bracing plate 55 upper end has all offered groove along the longitudinal direction, upper backup pad 41 left and right sides is stretched into from front to back respectively in a groove, the contact surface of upper backup pad 41 sidepiece bottom surface and bottom portion of groove is the inclined-plane being parallel to each other, the bottom of groove is provided with elasticity refractory support, upper backup pad 41 upper surface is equipped with the thermofin 56 being built into by refractory brick, upper backup pad 41 forward edge and posterior edges are provided with simultaneously heat insulation for fire door insulated wall all in left-right direction, each first refractory brickwork 4 is positioned at and above upper backup pad 41, is provided with the first projection 57, thermofin about 56 two ends are equipped with the 2nd projection 58, each the 2nd projection lower surface 58 is corresponding to a first projection 57 upper surface running fit with side.
The working process of the present invention is: first lay the thermofin 56 being built into by refractory brick on the upper backup pad 41 of kiln car 10, silicon nitride combined silicon carbide product blank to be processed is placed on thermofin 56, kiln car 10 enters in main kiln body 59 by track 47, upper backup pad 41 two ends of kiln car 10 are inserted in the groove that bracing members is lived, rotated by driven by motor worm screw 50, worm gear 49 is rotated and drives leading screw 51 to be moved down by the spacing groove on body skin 48 along worm screw 50, owing to leading screw 51 is threaded with worm gear 49, worm gear 49 rotates and makes leading screw 51 promote upper backup pad 41 to move backward, thus heighten the hypotenuse structure rolls forward of wheel 45 along fixed block 43, so that upper backup pad 41 falls, upper backup pad 41 contacts with the bottom portion of groove of steel bracing plate 55 and forms inclined-plane cooperation, thus form sealing, then wicket is shut, vacuum pump is connected by the import of pipeline with vacuum-pumping tube pipe 65, start vacuum pump to vacuumize in main kiln body 59, the gas mixture of Sweet natural gas and air light through burner 28 and to flame in heating tube 24, temperature around heating tube 24 is raised to and reaches preset temperature, by nitrogen injection tube 64 to nitrogen injection in main kiln body 59, silicon nitride combined silicon carbide product blank on kiln car 10 is between the heating unit 9 on both sides, thus start roasting, in the process of roasting, open vacuum fan by the high-temp waste gas run out of around heating unit 9 through air exhaust duct 6 and pipeline, the 2nd airflow line 21 is entered into from the 2nd Link Port 22, enter in the outer air-flow passage 13 of secondary kiln body 60 by bleeding point 20, act on through interchanger 15, high-temp waste gas in outer air-flow passage 13 enters the first airflow line 18 through venting port 17, enter in uptake 7 through the first Link Port 19 and pipeline, formation high temperature gas flow plays and adds heat effect, silicon nitride combined silicon carbide product is formed after the scheduled time, reversed by driven by motor worm screw 50, worm gear 49 is rotated backward and drives leading screw 51 to be moved up by the spacing groove on body skin 48 along worm screw 50, owing to leading screw 51 is threaded with worm gear 49, worm gear 49 reversion makes leading screw 51 pull upper backup pad 41 to move forward, thus heighten wheel 45 and roll backward along the hypotenuse structure of fixed block 43, so that upper backup pad 41 rises, kiln car 10 is pulled out, in whole roasting process, owing in main kiln body 59, temperature is very high, heating tube 24 can expand, or after roasting terminates, in main kiln body 59, temperature is reduced by height, heating tube 24 can be made to shrink, now by the push bolt 38 that turns on holding device 31 thus promote strongback 36 to hold out against burner brick 25 and extrude heating tube 24 so that heating unit 9 is more stable, it is provided with heating unit 9 in the left side of main kiln body 59 internal upper part and right side, and heating unit is all set to three layers of heating tube 24, adopt said structure heat conduction efficiency height so that in main kiln body 59, temperature distribution is more even so that the temperature remained constant in main kiln body 59.
The silicon nitride combined silicon carbide product cost that the present invention burns through examination is low, has been used in shaft reduction stove, aluminum smelting technology, pushed bat kiln push pedal and superior performance.
The present embodiment is not that the shape to the present invention, material, structure etc. do any restriction in form; every any simple modification, equivalent variations and modification above embodiment done according to the technical spirit of the present invention, all belongs to the protection domain of technical solution of the present invention.
Claims (5)
1. direct transfer and lead energy saving and environment friendly nitrogenize kiln, it is characterized in that: comprise the main kiln body that is arranged on along anterior-posterior horizontal direction on ground and be arranged on below ground and the secondary kiln body that be positioned at main kiln body side parallel with main kiln body length direction, main kiln body comprises vertical cross section and is rectangle and top, cross section is the steel plate layer of arch structure, insulating cotton layer and fire brick layer, steel plate layer, insulating cotton layer and fire brick layer are from arranging successively outside to inside, on front side of main kiln body, face and rear side are respectively arranged with wicket, the left and right sides of main kiln body front and rear is all vertically installed with the first refractory brickwork that two sides is parallel to each other, first refractory brickwork is upwards successively through fire brick layer, insulating cotton layer and steel plate layer, the arch structure at steel plate layer top is fixedly connected with by joint bolt with the junction of the first refractory brickwork, it is positioned at four angles place correspondence in main kiln body and vertically it is provided with four fire-boxes, each fire-box includes vertically disposed air exhaust duct and uptake, air exhaust duct and uptake are by separating about vertically disposed 2nd refractory brickwork, air exhaust duct is near Zhu Yaoti center, uptake is away from Zhu Yaoti center, left side and the right side of main kiln body internal upper part are respectively equipped with a heating unit, the front-end and back-end of each heating unit respectively with a fire-box on front side of main kiln body and after main kiln body a fire-box of side be connected, two sides first is provided with kiln car between refractory brickwork bottom, two heating units are positioned at both sides above kiln car, on the left of main kiln body and right side is equipped with some nitrogen injection tubes and vacuum-pumping tube, each nitrogen injection tube is all disposed on main kiln body sidewall bottom along anterior-posterior horizontal direction, each vacuum-pumping tube is all disposed in the middle part of main kiln body sidewall along anterior-posterior horizontal direction, all nitrogen injection tubes are all connected with main kiln body inside with vacuum-pumping tube,
Secondary kiln body comprises vertical cross section and is outer kiln body and the inner kiln tube that rectangle and cross section dual-side and limit, top are arch, outer kiln body and inner kiln tube are built into by refractory brick, outer air-flow passage is formed between outer kiln body inwall and inner kiln tube outer wall, interior air-flow passage it is provided with along the longitudinal direction in inner kiln tube, the face, front side of outer kiln body adopts refractory brickwork shutoff, the rear side of inner kiln tube adopts refractory brickwork shutoff, interior air-flow Channel front end is connected with the vacuum fan being located on ground by pipeline, upper inside wall in outer kiln body is provided with interchanger, the connected entrance being connected outer air-flow passage and interior air-flow passage is offered in inner kiln tube left side wall bottom along interval, anterior-posterior horizontal direction, two venting ports have been offered on outer kiln body right side wall top, two venting ports are arranged along interval, anterior-posterior horizontal direction, each venting port outer end is connected to first airflow line, every bar first airflow line has been offered two the first Link Ports along airflow direction, four the first Link Port correspondences are connected with the lower end of the uptake of four fire-boxes by pipeline, inner kiln tube right side wall bottom is offered two and is positioned at the bleeding point below venting port, two bleeding points are arranged along interval, anterior-posterior horizontal direction, each bleeding point outer end is connected to one article of the 2nd airflow line, every article of the 2nd airflow line has been offered two the 2nd Link Ports along airflow direction, four the 2nd Link Ports are corresponding respectively to be connected with the lower end of the air exhaust duct of four fire-boxes by an extraction pipe, it is respectively equipped with a control valve along two extraction pipes of the contiguous vacuum fan in airflow direction.
2. according to claim 1 direct transferring leads energy saving and environment friendly nitrogenize kiln, it is characterized in that: heating unit comprises three layers of heating tube all arranged along anterior-posterior horizontal direction, three layers of heating tube distribute from top to bottom, the pipe body composition that every layer of heating tube is arranged by least two coaxial correspondence sealings, adjacent two Guan Tizhong pipe body is plugged in another root pipe body, the equal sealed card in the front-end and back-end of every layer of heating tube is connected to burner brick, between two pipe body junctions, all by high temperature cotton sealing between burner brick and heating tube junction, burner brick is divided into upper and lower two halves and blocks between two halves up and down and connects, each burner brick has been offered two pores respectively, it is respectively equipped with burner and flame-observing hole in the burner brick at every layer of heating tube two ends, with the burner of one end and the equal interval of flame-observing hole and staggered arrangement, it is provided with bracing frame between every layer of heating tube, bracing frame is located on main kiln body inwall away from side, Zhu Yaoti center is fixing, the equal level in bracing frame top and bottom offers the semi-circular recesses suitable with heating tube cylindrical, on each burner brick, one end away from heating tube is equipped with holding device, the air inlet end of each burner is connected to natural gas tube and heating duct, the hot gas outlet of interchanger is connected with the inlet mouth of heating duct.
3. according to claim 2 direct transferring leads energy saving and environment friendly nitrogenize kiln, it is characterized in that: be positioned at the holding device on front side of main kiln body and comprise retaining plate, sleeve pipe and strongback, retaining plate is fixedly connected on sleeve pipe front end, compression spring it is provided with in sleeve pipe, retaining plate center has been threaded push bolt, push bolt rear end is fixedly connected with push pedal, push pedal is slidably connected in sleeve pipe, compression spring front end is fixedly connected on side after push pedal, on front side of strongback, center, face is fixedly connected with the preset pieces extending in sleeve pipe, compression spring rear end be enclosed within preset pieces and with strongback on front side of face top press-fit, one end that after strongback, side is fixedly connected on burner brick away from heating tube.
4. according to claim 1 direct transferring leads energy saving and environment friendly nitrogenize kiln, it is characterized in that: kiln car comprises horizontally disposed upper backup pad and lower supporting plate, four angles place correspondence of upper backup pad lower surface is provided with fixed block, each fixed block lower surface is all arranged in low dip after front height, lower supporting plate front and rear is fixedly connected with axletree along left and right horizontal direction respectively, each both ends, axletree left and right is all rotatably connected to heightens wheel, each is heightened all corresponding lower surface rolling with a fixed block in wheel top and is connected, axletree is rotatably connected to the wheel being positioned at each and heightening wheel outside, wheel rolling is connected to and is located on the track on ground along anterior-posterior horizontal direction, upper backup pad front center is provided with Power Drive Unit, Power Drive Unit comprises body skin, worm gear, worm screw and leading screw, upper backup pad front end center is provided with bearing support, leading screw is horizontally disposed with along the longitudinal direction and leading screw rear end is rotatably connected in bearing support, worm gear is positioned at body skin, leading screw is through worm gear center and is threaded with worm gear, worm screw vertically extend in body skin and with worm gear engaged transmission, on front side of body skin, limited location groove is all vertically offered in face and rear side, the spacing groove of leading screw on body skin, lower supporting plate front end has been horizontally disposed with web plate, web plate upper surface it is fixedly connected on bottom body skin.
5. according to claim 4 direct transferring leads energy saving and environment friendly nitrogenize kiln, it is characterized in that: every refractory brickwork bottom, face first is provided with steel bracing plate, it is located at bottom steel bracing plate on ground, each steel bracing plate upper end has all offered groove along the longitudinal direction, the upper backup pad left and right sides is stretched into from front to back respectively in a groove, the contact surface of upper backup pad sidepiece bottom surface and bottom portion of groove is the inclined-plane being parallel to each other, the bottom of groove is provided with elasticity refractory support, upper backup pad upper surface is equipped with the thermofin being built into by refractory brick, upper backup pad forward edge and posterior edges are provided with simultaneously heat insulation for fire door insulated wall all in left-right direction, every face first refractory brickwork is positioned at and above upper backup pad, is provided with the first projection, two ends, thermofin left and right are equipped with the 2nd projection, each the 2nd projection lower surface is corresponding to a first projection upper surface running fit with side.
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| CN204421596U (en) * | 2014-12-08 | 2015-06-24 | 重庆紫竹桦苑建材有限公司 | Tunnel cave sealing system |
| CN205425795U (en) * | 2016-03-21 | 2016-08-03 | 周志彬 | Direct transfer and lead energy -concerving and environment -protective type nitrogenize kiln |
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- 2016-03-21 CN CN201610160639.5A patent/CN105627741B/en not_active Expired - Fee Related
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