CN203364595U - Combustion chamber of semiconductor ceramic capacitor reductive firing furnace - Google Patents
Combustion chamber of semiconductor ceramic capacitor reductive firing furnace Download PDFInfo
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- CN203364595U CN203364595U CN 201320264076 CN201320264076U CN203364595U CN 203364595 U CN203364595 U CN 203364595U CN 201320264076 CN201320264076 CN 201320264076 CN 201320264076 U CN201320264076 U CN 201320264076U CN 203364595 U CN203364595 U CN 203364595U
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Abstract
Disclosed is a combustion chamber of a semiconductor ceramic capacitor reductive firing furnace. The combustion chamber is characterized by comprising a furnace pipe which is arranged in the horizontal direction. The furnace pipe is composed of a furnace pipe front segment, a furnace pipe middle segment and a furnace pipe rear segment, the furnace pipe front segment, the furnace pipe middle segment and the furnace pipe rear segment are sequentially connected from front to back, a molybdenum wire is wound on the outer wall of the furnace pipe middle segment, a furnace pipe inlet is formed in the front end of the furnace pipe front segment, an inlet furnace door and a first flame curtain are arranged at the position of the furnace pipe inlet, a furnace pipe outlet is formed in the rear end of the furnace pipe rear segment, and an outlet furnace door and a second flame curtain are arranged at the position of the furnace pipe outlet. When the semiconductor ceramic capacitor reductive firing furnace provided with the combustion chamber conducts sintering on semiconductor ceramic capacitor green-pressing, the semiconductor ceramic capacitor reductive firing furnace can be continuously used, the production efficiency is high, the use requirements for mass production can be met, the heat energy loss is small in the production process, and the energy consumption is lower.
Description
Technical field
The utility model relates to agglomerating plant, is specifically related to a kind of burner hearth of semiconductor ceramic capacitor reductive firing stove.
Background technology
Existing for burning till the reductive firing stove of semiconductor ceramic capacitor, as clock hood type furnace, can only use by batch (-type), that is to say, the semiconductor ceramic capacitor green compact are put into to reductive firing stove (as clock hood type furnace) in batches and carry out sintering, after last consignment of semiconductor ceramic capacitor green compact complete sintering taking-up, then next group semiconductor ceramic capacitor green compact are put into to the reductive firing stove and carry out sintering.This batch (-type) occupation mode is due to needs intensification, cooling repeatedly, and therefore the production cycle is longer on the one hand, and production efficiency is lower, is difficult to meet the instructions for use of producing in enormous quantities, loses on the other hand more heat energy, and energy consumption is larger.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of burner hearth of semiconductor ceramic capacitor reductive firing stove, semiconductor ceramic capacitor reductive firing stove with this burner hearth can continous way use, production efficiency is high, can meet the instructions for use of production in enormous quantities, and energy consumption is lower.The technical scheme adopted is as follows:
A kind of burner hearth of semiconductor ceramic capacitor reductive firing stove, it is characterized in that comprising boiler tube, the boiler tube along continuous straight runs arranges, boiler tube is comprised of the boiler tube leading portion be connected successively from A-P, boiler tube stage casing and boiler tube back segment, be wound with molybdenum filament on the outer wall in boiler tube stage casing, the front end of boiler tube leading portion is provided with the boiler tube entrance, and the boiler tube porch is provided with entrance fire door and the first fiery curtain, the rear end of boiler tube back segment is provided with the boiler tube outlet, and the boiler tube exit is provided with outlet fire door and the second fiery curtain.
Semiconductor ceramic capacitor reductive firing stove with this burner hearth also comprises body of heater and nitrogen and hydrogen mixture body feeding usually.Burner hearth is arranged on body of heater, and the boiler tube middle section is in the cavity of body of heater, and boiler tube leading portion and boiler tube back segment are outside body of heater; The nitrogen and hydrogen mixture body feeding can provide required nitrogen hydrogen mixeding gas for body of heater cavity, boiler tube cavity, the first fiery curtain and the second fiery curtain.The cavity that above-mentioned nitrogen and hydrogen mixture body feeding is boiler tube provides nitrogen hydrogen mixeding gas, makes sintering in the reducing atmosphere of semiconductor ceramic capacitor green compact under the nitrogen hydrogen mixeding gas protection in boiler tube; The cavity that above-mentioned nitrogen and hydrogen mixture body feeding is body of heater provides nitrogen hydrogen mixeding gas, makes in sintering process to be full of in body of heater nitrogen hydrogen mixeding gas, can play the effect of protection molybdenum filament; Above-mentioned nitrogen and hydrogen mixture body feeding also can be the first fiery curtain and the second fiery curtain provides burning required nitrogen hydrogen mixeding gas; light the fiery curtain sealing of rear formation (what wherein play the burning effect is hydrogen); can prevent that outside air from entering boiler tube in the situation that open the entrance fire door or export fire door; with the reducing atmosphere in the protection boiler tube; and prevent from blasting in boiler tube, guarantee the security of using.
Above-mentioned molybdenum filament on the outer wall of boiler tube stage casing, as heating element heater, can heat boiler tube, makes boiler tube inside reach sintering temperature required.When the semiconductor ceramic capacitor green compact are carried out to sintering, pass into nitrogen hydrogen mixeding gas in boiler tube, the semiconductor ceramic capacitor green compact enter boiler tube from the boiler tube entrance, under nitrogen hydrogen mixeding gas protection, carry out sintering, shift out boiler tube from the boiler tube outlet after completing sintering.In normal sintering process, the entrance fire door is by the sealing of boiler tube entrance, and the outlet fire door is by boiler tube outlet sealing.When needs are opened the entrance fire door, first start the first fiery curtain before opening the entrance fire door, the first fiery curtain passes into nitrogen hydrogen mixeding gas and lights, and boiler tube is entered to the sealing of interruption-forming fire curtain; In the time of need to closing the entrance fire door, close again the first fiery curtain after closing the entrance fire door.Equally, when needs are opened the outlet fire door, before opening the outlet fire door, first start the second fiery curtain, the second fiery curtain passes into nitrogen hydrogen mixeding gas and lights, and boiler tube is gone out to the sealing of interruption-forming fire curtain; In the time of need to closing the outlet fire door, after closing the outlet fire door, close again the second fiery curtain.
Above-mentioned boiler tube can adopt ceramic material to make (boiler tube leading portion, boiler tube stage casing and boiler tube back segment one are connected).
In a kind of preferred version, for preventing the molybdenum filament displacement, cause short circuit, the outer wall in above-mentioned boiler tube stage casing to be provided with a plurality of protruding block row circumferential uniform along boiler tube, each protruding block row comprises a plurality of protruding blocks evenly distributed along the boiler tube length direction; The position intersected at molybdenum filament and protruding block row, molybdenum filament be in this protruding block be listed as between adjacent two protruding blocks, by these two protruding blocks, to molybdenum filament, carry out spacing.In another kind of preferred version, for preventing the molybdenum filament displacement, cause short circuit, the outer wall in above-mentioned boiler tube stage casing is provided with spiral groove, and while being wound around molybdenum filament, molybdenum filament is in spiral groove, by spiral groove, molybdenum filament is positioned.
In preferred version, the guide rail of trend before and after the inner surface of above-mentioned boiler tube bottom is provided with, while carrying out sintering, usually the semiconductor ceramic capacitor green compact are loaded on supporting plate, the supporting plate that is mounted with the semiconductor ceramic capacitor green compact is placed on guide rail, and supporting plate can move from A-P along guide rail.Above-mentioned guide rail usually and boiler tube make one; Above-mentioned guide rail also can be laid on the inner surface of boiler tube bottom.In addition, can delivery device be set in boiler tube the place ahead, delivery device can be sent the supporting plate that is mounted with the semiconductor ceramic capacitor green compact into boiler tube, and propelling loading has the supporting plate of semiconductor ceramic capacitor green compact to move from A-P in boiler tube.
In preferred version, above-mentioned boiler tube leading portion is provided with explosion proof window, and the film explosion-proof apparatus is installed on explosion proof window.During normal the use, the film explosion-proof apparatus makes explosion proof window keep sealing; When the pressure in boiler tube surpasses certain limit, the film of film explosion-proof apparatus (generally adopting the aluminium film) breaks, and to reduce the pressure in boiler tube, the protection boiler tube is not damaged.
In preferred version, above-mentioned boiler tube stage casing is provided with thermocouple, and thermocouple can stretch in the boiler tube cavity, for detection of the temperature of boiler tube inside.
In a kind of concrete scheme, the above-mentioned first fiery curtain comprises the first air jet pipe and the first igniter, the first air jet pipe is located at boiler tube entrance downside, the first air jet pipe one end sealing, the other end are provided with the first fiery curtain air inlet, the upside tube wall of the first air jet pipe is provided with a plurality of the first puff prots, and the first igniter is corresponding with the first puff prot position.Nitrogen hydrogen mixeding gas enters the first air jet pipe from the first fiery curtain air inlet, and, from the upwards ejection of the first puff prot, after being lighted by the first igniter, forms fiery curtain sealing in the boiler tube porch.Usually, the first fiery curtain air inlet switch magnetic valve is installed on the first fiery curtain air inlet.The first fiery curtain air inlet is connected to the nitrogen hydrogen mixeding gas supply port of nitrogen and hydrogen mixture body feeding.
In a kind of concrete scheme, the above-mentioned second fiery curtain comprises the second air jet pipe and the second igniter, the second air jet pipe is located at boiler tube outlet downside, the second air jet pipe one end sealing, the other end are provided with the second fiery curtain air inlet, the upside tube wall of the second air jet pipe is provided with a plurality of the second puff prots, and the second igniter is corresponding with the second puff prot position.Nitrogen hydrogen mixeding gas enters the second air jet pipe from the second fiery curtain air inlet, and, from the upwards ejection of the second puff prot, after the second igniting mounted point combustion, forms fiery curtain sealing in the boiler tube exit.Usually, the second fiery curtain air inlet switch magnetic valve is installed on the second fiery curtain air inlet.The second fiery curtain air inlet is connected to the nitrogen hydrogen mixeding gas supply port of nitrogen and hydrogen mixture body feeding.
In preferred version, the outside of above-mentioned boiler tube leading portion is provided with front chuck, form the first interlayer cavity between front chuck and boiler tube leading portion, fore-clamp puts and is provided with the first air inlet be communicated with the first interlayer cavity, the boiler tube leading portion is provided with at least one first passage that the first interlayer cavity is communicated with the boiler tube cavity, also is provided with the downtake pipe that the boiler tube cavity is in communication with the outside on the boiler tube leading portion; The outside of boiler tube back segment is provided with rear chuck, form the second interlayer cavity between rear chuck and boiler tube back segment, rear chuck is provided with the second air inlet be communicated with the second interlayer cavity, the boiler tube back segment is provided with at least one second passage that the second interlayer cavity is communicated with the boiler tube cavity, also is provided with the second exhaust pipe that the boiler tube cavity is in communication with the outside on the boiler tube back segment; The first air inlet place is provided with the first air inlet switch magnetic valve, and the second air inlet place is provided with the second air inlet switch magnetic valve.Usually, above-mentioned downtake pipe is provided with first row air cock magnetic valve, second exhaust pipe is provided with second row air cock magnetic valve, and when first row air cock magnetic valve and second row air cock magnetic valve are opened, the gas in the boiler tube cavity can drain into the external world by downtake pipe and second exhaust pipe.The first air inlet and the second air inlet all are connected to the nitrogen hydrogen mixeding gas supply port of nitrogen and hydrogen mixture body feeding, when the first air inlet switch magnetic valve is opened, the gas that the nitrogen and hydrogen mixture body feeding is sent enters the first interlayer cavity through the first air inlet, the heat distributed by the boiler tube leading portion carries out preheating to it, then enters the boiler tube cavity through the first passage; When the second air inlet switch magnetic valve is opened, the gas that the nitrogen and hydrogen mixture body feeding is sent enters the second interlayer cavity through the second air inlet, the heat distributed by the boiler tube back segment carries out preheating to it, enter the boiler tube cavity through the second passage again, like this, during sintering, the nitrogen hydrogen mixeding gas that the nitrogen and hydrogen mixture body feeding is sent is before entering the boiler tube cavity, the heat first distributed by boiler tube leading portion and boiler tube back segment carries out preheating to it, offer again the boiler tube cavity, can further reduce energy consumption, and enhance productivity.
Above-mentioned front chuck and rear chuck can adopt iron and steel to make, and are connected with furnace body outer wall by connector, and the junction of the junction of front chuck and furnace body outer wall, rear chuck and furnace body outer wall all seals.Usually, body of heater is provided with the 3rd air inlet and the 3rd blast pipe be communicated with the body of heater cavity; The 3rd air inlet is connected to the nitrogen hydrogen mixeding gas supply port of nitrogen and hydrogen mixture body feeding, and the 3rd air inlet place is provided with the 3rd air inlet switch magnetic valve; The 3rd blast pipe is provided with the 3rd air discharge cook magnetic valve.When the 3rd air inlet switch magnetic valve is opened, the gas that the nitrogen and hydrogen mixture body feeding is sent enters the body of heater cavity through the 3rd air inlet; When the 3rd air discharge cook magnetic valve is opened, the gas in the body of heater cavity can drain into the external world by the 3rd blast pipe.During actual design, above-mentioned the first interlayer cavity and the second interlayer cavity can all be communicated with (that is to say between the corresponding position of sidewall of the furnace body and boiler tube and have gap) with the body of heater cavity; Also can the first interlayer cavity and the body of heater cavity between isolation mutually, between the second interlayer cavity and body of heater cavity, mutually isolate.
Semiconductor ceramic capacitor reductive firing stove with burner hearth of the present utility model, when the semiconductor ceramic capacitor green compact are carried out to sintering, the semiconductor ceramic capacitor green compact enter boiler tube from the boiler tube entrance, complete sintering under the nitrogen hydrogen mixeding gas protection after, shift out boiler tube from the boiler tube outlet, and, enter the sealing of interruption-forming fire curtain by the first fiery curtain at boiler tube when opening the entrance fire door, go out the sealing of interruption-forming fire curtain by the second fiery curtain at boiler tube when opening the outlet fire door, can keep the reducing atmosphere in boiler tube, thereby can continous way use, production efficiency is high, can meet the instructions for use of production in enormous quantities, and in production process, heat-energy losses is few, energy consumption is lower.In addition, adopt the heating element heater as boiler tube around the molybdenum filament on the outer wall of boiler tube stage casing, the efficiency of heating surface is higher, and service life is longer.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred embodiment;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is the structural representation of the first fiery curtain;
Fig. 4 is the structural representation of the second fiery curtain;
Fig. 5 is the structural representation with a kind of semiconductor ceramic capacitor reductive firing stove of the burner hearth shown in Fig. 1.
The specific embodiment
As depicted in figs. 1 and 2, the burner hearth of this semiconductor ceramic capacitor reductive firing stove comprises boiler tube 5, boiler tube 5 along continuous straight runs settings, and boiler tube 5 is comprised of the boiler tube leading portion 51 be connected successively from A-P, boiler tube stage casing 52 and boiler tube back segment 53; Be wound with molybdenum filament 4 on the outer wall in boiler tube stage casing 52; The front end of boiler tube leading portion 51 is provided with boiler tube entrance 54, and boiler tube entrance 54 places are provided with entrance fire door 6 and the first fiery curtain 7; The rear end of boiler tube back segment 53 is provided with boiler tube outlet 55, and boiler tube exports 55 places and is provided with outlet fire door 8 and the second fiery curtain 9.
The outer wall in boiler tube stage casing 52 is provided with two protruding block row circumferential uniform along boiler tube 5 (with reference to figure 1, one of them protruding block row is located on the outer wall at 52 tops, boiler tube stage casing, another protruding block row are located on the outer wall of 52 bottoms, boiler tube stage casing), each protruding block row comprises a plurality of protruding blocks 10 evenly distributed along boiler tube 5 length directions; The position intersected at molybdenum filament 4 and protruding block row, molybdenum filament 4 be in this protruding block be listed as between adjacent two protruding blocks 10, by 10 pairs of molybdenum filaments of these two protruding blocks 4, undertaken spacing.
With reference to figure 2, the guide rail 11 of trend before and after the inner surface of boiler tube 5 bottoms is provided with, guide rail 11 is made one with boiler tube 5.While carrying out sintering, the semiconductor ceramic capacitor green compact are loaded on supporting plate, the supporting plate that is mounted with the semiconductor ceramic capacitor green compact is placed on guide rail 11, and supporting plate can move from A-P along guide rail 11.Guide rail also can be laid on the inner surface of boiler tube bottom.
Boiler tube leading portion 51 is provided with explosion proof window 12, and film explosion-proof apparatus 13 is installed on explosion proof window 12.During normal the use, film explosion-proof apparatus 13 makes explosion proof window 12 keep sealing; When the pressure in boiler tube 5 surpasses certain limit, the film of film explosion-proof apparatus 13 (generally adopting the aluminium film) breaks, to reduce the pressure in boiler tube 5.
Boiler tube stage casing 52 is provided with thermocouple 14, and thermocouple 14 can stretch in boiler tube cavity 56, for detection of the temperature of boiler tube 5 inside.
As shown in Figure 3, in the present embodiment, the first fiery curtain 7 comprises the first air jet pipe 71 and the first igniter (not shown), the first air jet pipe 71 is located at boiler tube entrance 54 downsides, the first air jet pipe 71 1 end sealings, the other end are provided with the first fiery curtain air inlet 72, it is corresponding with the first puff prot 73 positions that the upside tube wall of the first air jet pipe 71 is provided with a plurality of the first puff prot 73, the first igniters.Nitrogen hydrogen mixeding gas enters in the cavity of the first air jet pipe 71 from the first fiery curtain air inlet 72, and, from the first upwards ejection of puff prot 73, after being lighted by the first igniter, forms fiery curtain sealing at boiler tube entrance 54 places.The first fiery curtain air inlet switch magnetic valve 74 is installed on the first fiery curtain air inlet 72.
As shown in Figure 4, in the present embodiment, the second fiery curtain 9 comprises the second air jet pipe 91 and the second igniter (not shown), the second air jet pipe 91 is located at boiler tube and is exported 55 downsides, the second air jet pipe 91 1 end sealings, the other end are provided with the second fiery curtain air inlet 92, it is corresponding with the second puff prot 93 positions that the upside tube wall of the second air jet pipe 91 is provided with a plurality of the second puff prot 93, the second igniters.Nitrogen hydrogen mixeding gas enters in the cavity of the second air jet pipe 91 from the second fiery curtain air inlet 92, and, from the second upwards ejection of puff prot 93, after the second igniting mounted point combustion, exports 55 places at boiler tube and form fiery curtain sealing.The second fiery curtain air inlet switch magnetic valve 94 is installed on the second fiery curtain air inlet 92.
In the present embodiment, the outside of boiler tube leading portion 51 is provided with front chuck 15, form the first interlayer cavity 16 between front chuck 15 and boiler tube leading portion 51, front chuck 15 is provided with the first air inlet 17 be communicated with the first interlayer cavity 16, boiler tube leading portion 51 is provided with two the first passages 18 that the first interlayer cavity 16 is communicated with boiler tube cavity 56, also is provided with the downtake pipe 19 that boiler tube cavity 56 is in communication with the outside on boiler tube leading portion 51; The outside of boiler tube back segment 53 is provided with rear chuck 20, form the second interlayer cavity 21 between rear chuck 20 and boiler tube back segment 53, rear chuck 20 is provided with the second air inlet 22 be communicated with the second interlayer cavity 21, boiler tube back segment 53 is provided with two the second passages 23 that the second interlayer cavity 21 is communicated with boiler tube cavity 56, also is provided with the second exhaust pipe 24 that boiler tube cavity 56 is in communication with the outside on boiler tube back segment 53; The first air inlet 17 places are provided with the first air inlet switch magnetic valve 27, the second air inlet 22 places and are provided with the second air inlet switch magnetic valve 28, and downtake pipe 19 is provided with first row air cock magnetic valve 30, and second exhaust pipe 24 is provided with second row air cock magnetic valve 31.Front chuck 15 and rear chuck 20 all adopt iron and steel to make.
In addition, can delivery device be set in boiler tube the place ahead, delivery device can be sent the supporting plate that is mounted with the semiconductor ceramic capacitor green compact into boiler tube, and propelling loading has the supporting plate of semiconductor ceramic capacitor green compact to move from A-P in boiler tube.
As shown in Figure 5, there is a kind of semiconductor ceramic capacitor reductive firing stove of above-mentioned burner hearth, also comprise body of heater, nitrogen and hydrogen mixture body feeding and nitrogen gas supply device.
Body of heater comprises the shell 1 of being made by iron and steel and the heat-insulation layer 2 consisted of corundum-mullite refractory brick, and heat-insulation layer 2 is located on the inwall of shell 1, and the cavity 3 of body of heater is surrounded by heat-insulation layer 2.
Burner hearth is arranged on body of heater; Boiler tube stage casing 52 is in the cavity 3 interior (between heat-insulation layer 2 and boiler tube stage casing 52, being filled with quartz sand) of body of heater, and boiler tube leading portion 51 and boiler tube back segment 53 are outside body of heater.Body of heater is provided with the 3rd air inlet 25 that is communicated with body of heater cavity 3 and the 3rd blast pipe 26, the three air inlet 25 places and is provided with the 3rd air inlet switch magnetic valve 29, the three blast pipes 26 and is provided with the 3rd air discharge cook magnetic valve 32.Front chuck 15 all is connected with shell 1 by connector with rear chuck 20, and front chuck 15 all seals with the junction of shell 1 with the junction of shell 1, rear chuck 20.There is gap in sidewall of the furnace body between the position corresponding with boiler tube 5, and the first interlayer cavity 16 is communicated with body of heater cavity 3 by gap 33, and the second interlayer cavity 21 passes through gap 34 and is communicated with body of heater cavity 3.
The nitrogen and hydrogen mixture body feeding can provide nitrogen hydrogen mixeding gas for body of heater cavity 3, the fiery curtain 7 of boiler tube cavity 56, first and the second fiery curtain 9; The nitrogen gas supply device can provide nitrogen for body of heater cavity 3 and boiler tube cavity 56.
The nitrogen and hydrogen mixture body feeding comprises liquefied ammonia holding vessel 35, ammonia decomposition device 36, mixed gas delivery pipe 37 and excessive device of air 38; The outlet of liquefied ammonia holding vessel 35 is communicated with ammonia decomposition device 36 by ammonia carrier pipe 39, and the first pressure-reducing valve 40 is installed on ammonia carrier pipe 39; In excessive device of air 38, liquid (for example water) is housed, mixed gas delivery pipe 37 1 ends are communicated with ammonia decomposition device 36, the other end inserts in the liquid in the device of air 38 that overflows, and the device of air 38 that overflows is provided with nitrogen hydrogen mixeding gas supply port 41.Liquefied ammonia in liquefied ammonia holding vessel 35, after the first pressure-reducing valve 40 decompressions, forms ammonia and enters ammonia decomposition device 36; Ammonia decomposition device 36 resolves into nitrogen hydrogen mixeding gas (for example can, under 800～850 ℃, under the nickel-base catalyst effect, ammonia being decomposed) by ammonia, and in nitrogen hydrogen mixeding gas, the mol ratio of nitrogen and hydrogen is 1:3; After nitrogen hydrogen mixeding gas enters the device of air 38 that overflows (liquid in the device of air 38 that overflows can prevent gas backflow), can externally supply with nitrogen hydrogen mixeding gas from nitrogen hydrogen mixeding gas supply port 41.
The nitrogen gas supply device comprises liquid nitrogen storage tank 42 and nitrogen supply pipe 43, store liquid nitrogen in liquid nitrogen storage tank 42, the outlet of liquid nitrogen storage tank 42 connects the inlet end of nitrogen supply pipe 43, and the gas outlet that the second pressure-reducing valve 44, the second pressure-reducing valves 44 are installed on nitrogen supply pipe 43 forms nitrogen gas supply mouth 45.
The nitrogen gas supply mouth 45 of nitrogen gas supply device and the nitrogen hydrogen mixeding gas supply port 41 of nitrogen and hydrogen mixture body feeding all are connected to total air supply pipe 46, in the present embodiment, adopt tee pipe fitting 47 to realize nitrogen hydrogen mixeding gas supply port 41, connection between nitrogen gas supply mouth 45 and total air supply pipe 46, tee pipe fitting 47 has the first interface be interconnected, the second interface and the 3rd interface, nitrogen hydrogen mixeding gas supply port 41 is by the first interface of nitrogen hydrogen mixeding gas supply pipe 48 connecting tee pipe fittings 47, the second interface of the outlet side connecting tee pipe fitting 47 of nitrogen supply pipe 43, the 3rd interface of the inlet end connecting tee pipe fitting 47 of total air supply pipe 46, nitrogen hydrogen mixeding gas supply port 41 places of nitrogen and hydrogen mixture body feeding are provided with the first air supply valve magnetic valve 49, nitrogen gas supply mouth 45 places of nitrogen gas supply device are provided with the position that second air supply valve magnetic valve 50(the second air supply valve magnetic valve 50 is arranged on close the second pressure-reducing valve 44 on nitrogen supply pipe 43, and the second air supply valve magnetic valve 50 is between the second pressure-reducing valve 44 and tee pipe fitting 47).Provide nitrogen or nitrogen hydrogen mixeding gas by total air supply pipe 46 for body of heater cavity 3 and boiler tube cavity 56.
Above-mentioned semiconductor ceramic capacitor reductive firing stove also comprises gas service pipes part 61, the first appendix 62, the second appendix 63, the 3rd appendix 64, the 4th appendix 65 and the 5th appendix 66, gas distribution component 61 is provided with a total air inlet 611 and five and branches out gas port 612, described five branch out gas port 612 and all are communicated with described total air inlet 611, the outlet side of total air supply pipe 46 connects described total air inlet 611, described five branch out the inlet end that gas port 612 connects respectively the first appendix 62, the inlet end of the second appendix 63, the inlet end of the 3rd appendix 64, the inlet end of the inlet end of the 4th appendix 65 and the 5th appendix 66, the outlet side of the first appendix 62 connects the first air inlet 17, the outlet side of the second appendix 63 connects the second air inlet 22, the outlet side of the 3rd appendix 64 connects the 3rd air inlet 25, the outlet side of the 4th appendix 65 connects the first fiery curtain air inlet 72, the outlet side of the 5th appendix 66 connects the second fiery curtain air inlet 92.
Brief description is the operation principle of above-mentioned semiconductor ceramic capacitor reductive firing stove once:
When the first air supply valve magnetic valve 49 unlatchings and the second air supply valve magnetic valve 50 are closed, the nitrogen and hydrogen mixture body feeding is communicated with total air supply pipe 46, can be to body of heater cavity 3, the fiery curtain 7 of boiler tube cavity 56, first and the second fiery curtain 9 supply nitrogen hydrogen mixeding gas; The first air supply valve magnetic valve 49 cuts out and the second air supply valve magnetic valve 50 while opening, and the nitrogen gas supply device is communicated with total air supply pipe 46, can be to body of heater cavity 3 and boiler tube cavity 56 the supply of nitrogen; When the first air supply valve magnetic valve 49 and the second air supply valve magnetic valve 50 are all closed, stop to body of heater cavity 3, the fiery curtain 7 of boiler tube cavity 46, first and the second fiery curtain 9 air feed.
When the first air inlet switch magnetic valve 27 is opened, the nitrogen hydrogen mixeding gas that the nitrogen and hydrogen mixture body feeding is sent (or nitrogen gas supply device send nitrogen) enters the first interlayer cavity 16 through the first air inlet 17, then enters boiler tube cavity 56 through the first passage 18; When the second air inlet switch magnetic valve 28 is opened, the nitrogen hydrogen mixeding gas that the nitrogen and hydrogen mixture body feeding is sent (or nitrogen gas supply device send nitrogen) enters the second interlayer cavity 21 through the second air inlet 22, then enters boiler tube cavity 56 through the second passage 23; When the 3rd air inlet switch magnetic valve 29 is opened, the nitrogen hydrogen mixeding gas that the nitrogen and hydrogen mixture body feeding is sent (or nitrogen gas supply device send nitrogen) enters body of heater cavity 3 through the 3rd air inlet 27, and can enter the first interlayer cavity 16 or the second interlayer cavity 21, with by the first passage 18 or the second passage 23, entering boiler tube cavity 56.When first row air cock magnetic valve 30 and second row air cock magnetic valve 31 are opened, the gas in boiler tube cavity 56 drains into the external world by downtake pipe 19 and second exhaust pipe 24; When the 3rd air discharge cook magnetic valve 32 is opened, the gas in body of heater cavity 3 drains into the external world by the 3rd blast pipe 26.By the common cooperation of the first air inlet 17, the second air inlet 22, the 3rd air inlet 27, downtake pipe 19, second exhaust pipe 24 and the 3rd blast pipe 26, can to the gas in body of heater cavity 3 and boiler tube cavity 56, be replaced simultaneously.
Before carrying out sintering, the first air supply valve magnetic valve 49 cuts out and the second air supply valve magnetic valve 50 is opened, the nitrogen gas supply device is communicated with total air supply pipe 46, to body of heater cavity 3 and boiler tube cavity 56 the supply of nitrogen (in this process, the first air inlet switch magnetic valve 27, the second air inlet switch magnetic valve 28, the 3rd air inlet switch magnetic valve 29, first row air cock magnetic valve 30, second row air cock magnetic valve 31 and the 3rd air discharge cook magnetic valve 32 are all opened), utilize original gas in nitrogen replacement body of heater cavity 3 and boiler tube cavity 56, subsequently, the first air supply valve magnetic valve 49 opens and the second air supply valve magnetic valve 50 cuts out, the nitrogen and hydrogen mixture body feeding is communicated with total air supply pipe 46, to body of heater cavity 3, boiler tube cavity 56 passes into nitrogen hydrogen mixeding gas (the first air inlet switch magnetic valve 27 in this process, the second air inlet switch magnetic valve 28, the 3rd air inlet switch magnetic valve 29, first row air cock magnetic valve 30, second row air cock magnetic valve 31 and the 3rd air discharge cook magnetic valve 32 are all opened), with the nitrogen in nitrogen hydrogen mixeding gas displacement body of heater cavity 3 and boiler tube cavity 56, make to be full of nitrogen hydrogen mixeding gas in body of heater cavity 3 and boiler tube cavity 56, possesses the required reducing atmosphere of sintering.
Then carry out sintering.In sintering process, the molybdenum filament 4 on 52 outer walls of boiler tube stage casing is switched on and, to boiler tube 5 heating, makes boiler tube 5 inside reach sintering temperature required, the nitrogen and hydrogen mixture body feeding for boiler tube cavity 56 and body of heater cavity 3 provide nitrogen hydrogen mixeding gas, (now open and the second air supply valve magnetic valve 50 cuts out by the first air supply valve magnetic valve 49, the first air inlet switch magnetic valve 27, the second air inlet switch magnetic valve 28, the 3rd air inlet switch magnetic valve 29, first row air cock magnetic valve 30, second row air cock magnetic valve 31 and the 3rd air discharge cook magnetic valve 32 are all opened), make sintering in the reducing atmosphere of semiconductor ceramic capacitor green compact under the nitrogen hydrogen mixeding gas protection in boiler tube cavity 56, nitrogen hydrogen mixeding gas in body of heater cavity 3 can play the effect of protection molybdenum filament 4, the semiconductor ceramic capacitor green compact enter boiler tube 5 from boiler tube entrance 54, under nitrogen hydrogen mixeding gas protection, carry out sintering, shift out boiler tube 5 from boiler tube outlet 55 after completing sintering.And, in sintering process, nitrogen hydrogen mixeding gas in entering boiler tube cavity 56 before, the heat distributed by boiler tube stage casing 52 during through body of heater cavity 3 carries out preheating to it, the heat distributed by boiler tube leading portion 41 during through the first interlayer cavity 16 carries out preheating to it, the heat distributed by boiler tube back segment 53 through the second interlayer cavity 21 carries out preheating to it, strengthens energy-saving effect.
In normal sintering process, entrance fire door 6 is by 54 sealings of boiler tube entrance, and outlet fire door 8 is by boiler tube outlet 55 sealings.When needs are opened entrance fire door 6, opening the front first fiery curtain 7 that first starts of entrance fire door 6, the first fiery curtain 7 passes into nitrogen hydrogen mixeding gas and lights (now the first air supply valve magnetic valve 49 unlatchings, the second air supply valve magnetic valve 50 cuts out, and the first fiery curtain air inlet switch magnetic valve 74 is opened), boiler tube entrance 54 is formed to fiery curtain sealing; In the time of need to closing entrance fire door 6, after closing entrance fire door 6, close again the first fiery curtain 7(now the first fiery curtain air inlet switch magnetic valve 74 close).Equally, when needs are opened outlet fire door 8, opening the front second fiery curtain 9 that first starts of outlet fire door 8, the second fiery curtain 9 passes into nitrogen hydrogen mixeding gas and lights (now the first air supply valve magnetic valve 49 unlatchings, the second air supply valve magnetic valve 50 cuts out, and the second fiery curtain air inlet switch magnetic valve 94 is opened), boiler tube outlet 55 is formed to fiery curtain sealing; Need to close outlet during fire door 8, after closing outlet fire door 8, close again the second fiery curtain 9(now the second fiery curtain air inlet switch magnetic valve 94 close).
After all agglomerants complete, molybdenum filament 4 deenergizations, stop boiler tube 5 heating, boiler tube 5 is lowered the temperature gradually, and utilize nitrogen hydrogen mixeding gas in nitrogen replacement body of heater cavity 3 and boiler tube cavity 56 (now the first air supply valve magnetic valve 49 cuts out and the second air supply valve magnetic valve 50 is opened, and the first air inlet switch magnetic valve 27, the second air inlet switch magnetic valve 28, the 3rd air inlet switch magnetic valve 29, first row air cock magnetic valve 30, second row air cock magnetic valve 31 and the 3rd air discharge cook magnetic valve 32 are all opened).
In another kind of preferred version, for preventing the molybdenum filament displacement, cause short circuit, the outer wall in above-mentioned boiler tube stage casing is provided with spiral groove, and while being wound around molybdenum filament, molybdenum filament is in spiral groove, by spiral groove, molybdenum filament is positioned.
Claims (10)
1. the burner hearth of a semiconductor ceramic capacitor reductive firing stove, it is characterized in that comprising boiler tube, the boiler tube along continuous straight runs arranges, boiler tube is comprised of the boiler tube leading portion be connected successively from A-P, boiler tube stage casing and boiler tube back segment, be wound with molybdenum filament on the outer wall in boiler tube stage casing, the front end of boiler tube leading portion is provided with the boiler tube entrance, and the boiler tube porch is provided with entrance fire door and the first fiery curtain, the rear end of boiler tube back segment is provided with the boiler tube outlet, and the boiler tube exit is provided with outlet fire door and the second fiery curtain.
2. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 1, it is characterized in that: the outer wall in described boiler tube stage casing is provided with a plurality of protruding block row circumferential uniform along boiler tube, and each protruding block row comprises a plurality of protruding blocks evenly distributed along the boiler tube length direction; The position intersected at molybdenum filament and protruding block row, molybdenum filament be in this protruding block be listed as between adjacent two protruding blocks.
3. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 1, it is characterized in that: described boiler tube leading portion is provided with explosion proof window, and the film explosion-proof apparatus is installed on explosion proof window.
4. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 1, it is characterized in that: described boiler tube stage casing is provided with thermocouple, and thermocouple stretches in the boiler tube cavity.
5. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 1, it is characterized in that: the described first fiery curtain comprises the first air jet pipe and the first igniter, the first air jet pipe is located at boiler tube entrance downside, the first air jet pipe one end sealing, the other end are provided with the first fiery curtain air inlet, the upside tube wall of the first air jet pipe is provided with a plurality of the first puff prots, and the first igniter is corresponding with the first puff prot position.
6. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 5, is characterized in that: the first fiery curtain air inlet switch magnetic valve is installed on the described first fiery curtain air inlet.
7. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 1, it is characterized in that: the described second fiery curtain comprises the second air jet pipe and the second igniter, the second air jet pipe is located at boiler tube outlet downside, the second air jet pipe one end sealing, the other end are provided with the second fiery curtain air inlet, the upside tube wall of the second air jet pipe is provided with a plurality of the second puff prots, and the second igniter is corresponding with the second puff prot position.
8. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 7, is characterized in that: the second fiery curtain air inlet switch magnetic valve is installed on the described second fiery curtain air inlet.
9. according to the burner hearth of the described semiconductor ceramic capacitor reductive firing of claim 1-8 any one stove, it is characterized in that: the outside of described boiler tube leading portion is provided with front chuck, form the first interlayer cavity between front chuck and boiler tube leading portion, fore-clamp puts and is provided with the first air inlet be communicated with the first interlayer cavity, the boiler tube leading portion is provided with at least one first passage that the first interlayer cavity is communicated with the boiler tube cavity, also is provided with the downtake pipe that the boiler tube cavity is in communication with the outside on the boiler tube leading portion; The outside of boiler tube back segment is provided with rear chuck, form the second interlayer cavity between rear chuck and boiler tube back segment, rear chuck is provided with the second air inlet be communicated with the second interlayer cavity, the boiler tube back segment is provided with at least one second passage that the second interlayer cavity is communicated with the boiler tube cavity, also is provided with the second exhaust pipe that the boiler tube cavity is in communication with the outside on the boiler tube back segment; The first air inlet place is provided with the first air inlet switch magnetic valve, and the second air inlet place is provided with the second air inlet switch magnetic valve.
10. the burner hearth of semiconductor ceramic capacitor reductive firing stove according to claim 9, it is characterized in that: described downtake pipe is provided with first row air cock magnetic valve, and second exhaust pipe is provided with second row air cock magnetic valve.
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| CN 201320264076 CN203364595U (en) | 2013-05-15 | 2013-05-15 | Combustion chamber of semiconductor ceramic capacitor reductive firing furnace |
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| CN 201320264076 CN203364595U (en) | 2013-05-15 | 2013-05-15 | Combustion chamber of semiconductor ceramic capacitor reductive firing furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728928A (en) * | 2020-12-23 | 2021-04-30 | 合肥恒力装备有限公司 | Furnace tube air partition device for nitrogen atmosphere mesh belt furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728928A (en) * | 2020-12-23 | 2021-04-30 | 合肥恒力装备有限公司 | Furnace tube air partition device for nitrogen atmosphere mesh belt furnace |
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