CN217356869U - Ceramic kiln firing heating system using methanol fuel - Google Patents
Ceramic kiln firing heating system using methanol fuel Download PDFInfo
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- CN217356869U CN217356869U CN202122456307.0U CN202122456307U CN217356869U CN 217356869 U CN217356869 U CN 217356869U CN 202122456307 U CN202122456307 U CN 202122456307U CN 217356869 U CN217356869 U CN 217356869U
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The utility model discloses a ceramic kiln firing heating system using methanol fuel, which comprises a methanol fuel pump, a methanol fuel phase changer, a high-temperature burner, a ceramic kiln, a temperature sensor and a controller; the methanol fuel pump is used for pressurizing methanol liquid; the methanol fuel phase changer is connected with the methanol fuel pump through a pipeline and is used for gasifying the pressurized methanol liquid into gaseous methanol; the high-temperature combustor is used for introducing gaseous methanol and combusting to heat the ceramic kiln; the temperature sensor is used for detecting the temperature in the hearth of the ceramic kiln and feeding a temperature signal back to the controller; the controller is used for sending a heating instruction to the methanol fuel phase converter, receiving a temperature signal of the temperature sensor and controlling the output flow of the methanol fuel pump so as to control the combustion power of the high-temperature combustor. The utility model has stable combustion, high efficiency, cleanness, high temperature, no backfire, flame separation and flameout phenomena, and controllable combustion power; the atmosphere of the sintering gas in the kiln is adjusted, which is beneficial to improving the sintering rate and quality grade of the product.
Description
Technical Field
The utility model relates to an industrial combustion equipment field, concretely relates to use ceramic kiln of methyl alcohol fuel to burn heating system.
Background
The technical scheme of the existing ceramic kiln firing heating system comprises the following steps: an electric heating system and a natural gas or liquefied petroleum gas combustion system.
The electric heating system uses an electric heating element, adopts electric heating for heating, the gas atmosphere in the ceramic firing kiln is fixed, the environmental pollution is less, however, the electric heating element has limited bearing temperature, is generally only suitable for low-temperature kilns (within 1000 ℃), is barely used for high-temperature kilns (above 1000 ℃), and has short service life; in addition, the gas atmosphere in the furnace of the ceramic sintering furnace using electric heating is difficult to adjust, and because the sintering process of different ceramic products has different requirements on the gas atmosphere in the furnace, some ceramic products need oxidation atmosphere, some ceramic products need reduction atmosphere, and the electric heating mode cannot be simultaneously applied, the application range is greatly limited, and the application is not many.
The natural gas or liquefied petroleum gas combustion system burns and heats the ceramic kiln, adopt the gas fuel, the gas atmosphere in the ceramic firing kiln can reduce the air distribution by adjusting the air distribution proportion of the burner, make the combustion flame lack oxygen, the flame is a reducing flame, form the reducing atmosphere in the stove; air distribution can also be added to ensure that the combustion flame is over-oxidized, the flame becomes oxidation flame, and a reduction atmosphere is formed in the furnace; however, when the natural gas or liquefied petroleum gas combustion system heats the ceramic kiln, and the gas in the kiln is adjusted to be in a reducing atmosphere, because the combustion is in a serious anoxic state, the combustion flame temperature is low, the temperature in the kiln is slowly increased, and a large amount of black smoke is generated at the same time, so that energy waste is caused, and the environment is polluted; the technical scheme of the existing natural gas or liquefied petroleum gas combustion system for heating the ceramic kiln also comprises the following steps: the flame has the problems of insufficient combustion strength, unstable combustion, sudden flame fluctuation, easy flame separation, easy flameout and high content of CO in combustion products.
At present, no technical scheme of a ceramic kiln firing heating system using methanol fuel exists at home and abroad, and the technical problem to be solved by technical personnel in the field is to provide the ceramic kiln firing heating system using the methanol fuel.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides an use ceramic kiln of methyl alcohol fuel to burn heating system solves current electrical heating ceramic kiln system temperature application scope at least for a short time, and natural gas or liquefied petroleum gas combustion system intensity of combustion is not enough, and the burning is not enough stable abundant enough, appears easily from flame, flame-out problem.
(II) technical scheme
In order to solve the technical problem, the utility model provides a following technical scheme:
a ceramic kiln firing heating system using methanol fuel comprises a methanol fuel pump, a methanol fuel phase changer, a high-temperature burner, a ceramic kiln, a temperature sensor and a controller;
the methanol fuel pump is used for pressurizing methanol liquid;
the methanol fuel phase changer is connected with the methanol fuel pump through a pipeline and is used for gasifying the pressurized methanol liquid into gaseous methanol;
the high-temperature combustor is used for introducing gaseous methanol and combusting to heat the ceramic kiln;
the temperature sensor is used for detecting the temperature in the hearth of the ceramic kiln and feeding a temperature signal back to the controller;
the controller is used for sending a heating instruction to the methanol fuel phase converter, receiving a temperature signal of the temperature sensor and controlling the output flow of the methanol fuel pump so as to control the combustion power of the high-temperature combustor.
The high-temperature combustor comprises an inlet connecting pipe, an ejector, a premixing pressurization pipe, an inner burner, a secondary air introducing pipe, a back combustion chamber outer pipe, a combustor burner, a primary air adjusting ring and a secondary air adjusting ring;
the inlet connecting pipe is used for being connected with the methanol fuel phase converter and inputting gaseous methanol, and the outlet of the inlet connecting pipe is connected with a gaseous methanol nozzle;
the ejector is hermetically connected with the inlet connecting pipe and is provided with a primary air ejection chamber communicated with the gaseous methanol nozzle, the primary air ejection chamber is communicated with the outside through a primary air introducing hole, and the primary air ejection chamber gradually shrinks and extends towards the gas outflow direction to form an ejector throat;
the premixing pressurization pipe is hermetically connected with the ejector and is communicated with the throat of the ejector, and the gas flow path of the premixing pressurization pipe is larger than that of the throat of the ejector;
the inner fire nozzle is connected with the outlet of the premixing pressurizing pipe and is provided with an air outlet with the diameter smaller than that of the premixing pressurizing pipe;
the secondary air introducing pipe is hermetically connected to the periphery of the premixing pressurizing pipe and forms a secondary air introducing chamber with the premixing pressurizing pipe, and the secondary air introducing chamber is communicated with the outside through a secondary air introducing hole;
the outer pipe of the flashback chamber is hermetically connected with the secondary air introducing pipe and forms a flashback chamber with the inner flame nozzle, and the flashback chamber is communicated with the secondary air introducing chamber;
the burner fire head is hermetically connected with the external pipe of the flashback chamber, a combustion chamber is formed at the air outlet of the internal fire nozzle, and the combustion chamber is communicated with the flashback chamber and is provided with a gradually-reduced flame ejection port;
the primary air adjusting ring is in threaded connection with the periphery of the ejector and is used for shielding the primary air introducing hole so as to adjust the opening of the primary air introducing hole;
the secondary air adjusting ring is in threaded connection with the periphery of the secondary air introducing pipe and used for shielding the secondary air introducing hole to adjust the opening degree of the secondary air introducing hole.
According to the arrangement, the high-temperature combustor can correspondingly adjust the amount of combustion-supporting air sucked into the combustor automatically according to the change of the fuel flow through the primary air inlet and the secondary air inlet, and the high-temperature combustor is provided with the primary air adjusting ring and the secondary air adjusting ring to adjust the opening of the inlets; the combustion intensity can be adjusted by adjusting the primary air adjusting ring, namely the size of flame and the combustion temperature can be changed under the condition that the fuel flow is not changed, and the combustion temperature can be adjusted within the range of 1000-1480 ℃; the secondary air adjusting ring is adjusted to adjust the air coefficient in the high-temperature combustor so as to adapt to the firing atmosphere in the kiln.
Further, the electric heating methanol fuel phase changer is a soaking block which is formed by pouring metal armored electric heating pipes and reinforced heat exchange type gasification pipes together by aluminum alloy.
So set up, the aluminum alloy heat conduction is good, thermal inertia is little, can avoid electric heating pipe, heat exchange tube local high temperature to appear, can not only increase electric heating pipe's life, has more eliminated the carbon deposit phenomenon that the local high temperature of gasification pipe arouses, realizes that the gasification does not take liquid completely.
It is further provided that the methanol fuel pump is a variable quantity fixed quantity output pump.
With the arrangement, if the methanol fuel pump does not receive an operating instruction of the controller for changing the flow of the methanol fuel pump, the flow of the methanol fuel pumped by the methanol fuel pump is very stable within the operating pressure range, and is independent of the resistance of the gasifier, so that the uniform gasification of the fuel is facilitated, and the combustion flame is more stable.
Further, the ceramic kiln hearth is provided with a mounting hole, and the high-temperature combustor is arranged in the mounting hole.
So set up, the mounting hole makes things convenient for the installation of high temperature combustor, is favorable to the high temperature combustor to keep warm simultaneously.
Further, the methanol fuel pump is connected with a liquid methanol storage tank.
So set up, liquid methyl alcohol, convenient to use are carried through liquid methyl alcohol storage tank to the methyl alcohol fuel pump.
The burner head and the inner burner nozzle are made of corundum ceramics, and the fuel inlet, the ejector, the premixing pressurization pipe, the secondary air inlet pipe, the external pipe of the combustion chamber, the primary air adjusting ring and the secondary air adjusting ring are made of stainless steel.
So set up, high temperature combustor wholly tolerates high temperature, and thermal shock nature is good and long service life.
Further, the temperature sensor is a thermocouple.
By the arrangement, the temperature of the ceramic kiln can be monitored and transmitted by the thermocouple, the cost is low, and the use is convenient.
(III) advantageous effects
Compared with the prior art, the utility model provides an use ceramic kiln of methyl alcohol fuel to burn heating system possesses following beneficial effect:
(1) after the system is started, the combustion system controller outputs a heating instruction to the electric heating methanol fuel phase changer, the electric heating methanol fuel phase changer starts to preheat, and when the electric heating methanol fuel phase changer is preheated to a set phase change temperature, the methanol fuel phase changer enters a constant temperature state; before preheating is finished, the methanol fuel pump cannot be operated automatically or manually, and the methanol fuel pump can be started after the methanol fuel phase changer is preheated successfully to enter a constant temperature state; the methanol liquid fuel from the fuel storage tank enters the methanol fuel pump from the fuel inlet connecting pipe, the pressurized methanol liquid fuel pressurized by the methanol fuel pump enters the electrically heated methanol fuel phase changer through the output pipe of the methanol fuel pump, and the methanol fuel in the liquid phase state is completely gasified into the gas phase state; then, gaseous methanol fuel with pressure is conveyed to each methanol fuel high-temperature combustor through a gas-phase methanol fuel conveying pipe, ignition is carried out at a burner nozzle, and the high-temperature combustor enters a normal combustion state; the high-temperature flue gas that methyl alcohol fuel burning produced makes the temperature of ceramic kiln furnace rise gradually, temperature sensor on-line measuring furnace in temperature signal and immediate transfer to the controller, the burning power of controller adjustment high temperature combustor makes furnace temperature the same with ceramic product firing technology temperature curve that sets for, reach the temperature requirement of technology temperature curve, it is little to avoid electric heating ceramic kiln furnace system temperature application scope, and natural gas or liquefied petroleum gas combustion system burning strength is not enough, the burning is not enough stable abundant, the easy problem that leaves the flame, puts out fire appears.
(2) When the ceramic kiln firing heating system using the methanol fuel is used, the gaseous methanol nozzle ejects fuel airflow at a very high speed, the high-speed fuel airflow generates negative pressure in the primary air injection chamber, air outside the primary air introduction hole is injected into the primary air introduction hole, and the fuel gas and combustion-supporting air are intensively mixed at the throat part of the injector; the mixed combustible gas enters the premixing pressurizing chamber, the path is enlarged, the flow rate of the combustible gas is greatly reduced, the gas pressure is increased, then the combustible gas flows into the joint part of the combustion chamber and the combustion chamber from the inner burner, and after being ignited by manual or automatic ignition, premixed combustion flame is formed in combustion and then is ejected from a flame ejection port of the combustor at a high speed; when the flame is sprayed out at a high speed, negative pressure is generated in the flashback chamber, part of smoke generated by combustion is curled in the flashback chamber, and meanwhile, peripheral air is sucked into the flashback chamber from the secondary air introduction hole and is used as secondary combustion-supporting air to participate in combustion, namely, the flashback chamber automatically keeps open fire during the combustion period, so that the occurrence of faults of flame leaving, flame releasing and flameout can be completely avoided, and the combustor cannot flameout as long as fuel supply is not interrupted;
(3) according to the requirement of the kiln on the flame combustion intensity of the burner, the opening of the primary air introducing hole can be adjusted by rotating the primary air adjusting ring, and the air inlet quantity of the injection air is changed, so that the premixing proportion of the primary air is changed; the higher the premixing proportion of primary air is, the higher the flame combustion intensity is, the higher the flame temperature is, the flame temperature can be adjusted between 1000 ℃ and 1450 ℃, and the combustion effect is greatly improved compared with the traditional gas kiln burner; meanwhile, the opening of the secondary air introducing hole is adjusted by rotating the secondary air adjusting ring, so that the air inlet amount of the secondary air is changed to achieve the optimal air-fuel ratio, the combustion efficiency is improved, the combustion products are cleaner, and the phenomena of coking and carbon deposition are avoided;
(4) the pressure in the premixing pressurizing chamber of the ceramic kiln burning heating system using the methanol fuel is higher, and the flow velocity of mixed gas flowing out of the inner burner is greater than the propagation velocity of flame, so that the tempering fault cannot be generated;
(5) the ceramic kiln firing heating system using the methanol fuel has a simple and ingenious integral structure, can use stable combustion of the methanol liquid fuel with a low calorific value, has high combustion flame power density, stable combustion and short and powerful flame with the combustion flame temperature exceeding 1450 ℃, and achieves high-efficiency, clean and high-combustion; the phenomena of backfire, flame separation and flameout can not be generated; the temperature in the hearth can be detected, and the combustion power of the combustor can be automatically controlled; the atmosphere of the sintering gas in the kiln can be set and adjusted, and both oxidizing flame and reducing flame can be realized; the methanol fuel combustion system is suitable for firing ceramic products in a ceramic kiln, and is a brand-new ceramic kiln combustion system adopting the methanol fuel, because the combustion flue gas of the methanol fuel is very clean, the firing rate and the quality grade of the ceramic products can be improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the high-temperature combustor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The noun or term interpretation referred to herein:
methanol fuel pump: the methanol fuel pump can be a self-sucking pump or a magnetic pump, is a delivery pump for liquid methanol and other chemical raw materials similar to water, and the power of the delivery pump can be controlled by changing the rotating speed of an internal motor.
Methanol fuel phase changer: comprising a liquid fuel gasification device for converting methanol from a liquid state to a gaseous state.
A high-temperature combustor: such as a methanol burner, has a function of burning methanol.
Referring to fig. 1 and 2, fig. 1 is a schematic structural view of the present invention, fig. 2 is a schematic structural view of a high temperature burner of the present invention, and arrows in fig. 2 indicate air flow directions.
The utility model provides an use ceramic kiln of methyl alcohol fuel to burn heating system, including methyl alcohol fuel pump 1, methyl alcohol fuel looks changer 2, high temperature combustor 3, ceramic kiln 4, temperature sensor 5 and controller 6; the fuel inlet connecting pipe 11 of the methanol fuel pump 1 is connected with a liquid methanol storage tank and is used for pressurizing methanol liquid; the methanol fuel phase changer 2 is connected with the methanol fuel pump 1 through a fuel pump output pipe 10 and is used for gasifying the pressurized methanol liquid into gaseous methanol; the high-temperature combustor 3 is used for introducing gaseous methanol through the gas-phase methanol fuel delivery pipe 20 and combusting the gaseous methanol to heat the ceramic kiln 4; the temperature sensor 5 is used for detecting the temperature in the hearth of the ceramic kiln 4 and feeding a temperature signal back to the controller 6; the controller 6 is used for sending a heating instruction to the methanol fuel phase changer 2, receiving a temperature signal of the temperature sensor 5, and controlling the output flow of the methanol fuel pump 1 to control the combustion power of the high-temperature combustor 3.
In a preferred embodiment of the high temperature combustor 3, the high temperature combustor 3 includes an inlet connection 31, an ejector 32, a premixed pressure increasing pipe 33, an inner flame nozzle 34, a secondary air introduction pipe 35, a back-fire outer pipe 36, a combustor flame head 37, a primary air adjusting ring 38, and a secondary air adjusting ring 39; an inlet adapter 31 for connecting with the gas phase methanol fuel delivery pipe 20 of the methanol fuel phase changer 2 to input the gaseous methanol, an outlet of the inlet adapter 31 being connected with the gaseous methanol nozzle 310; the ejector 32 is hermetically connected with the inlet connecting pipe 31 and is provided with a primary air injection chamber 320 communicated with the gaseous methanol nozzle 310, the primary air injection chamber 320 is communicated with the outside through a primary air introducing hole 321, and the primary air injection chamber 320 is gradually reduced and extended towards the gas outflow direction to form an ejector throat 322; the premixing pressure inlet pipe 33 is hermetically connected with the ejector 32 and is communicated with the ejector throat 322, and the gas flow path of the premixing pressure inlet pipe is larger than that of the ejector throat 322; the inner burner 34 is connected with the outlet of the premixing pressurizing pipe 33 and is provided with an air outlet 340 with the diameter smaller than that of the premixing pressurizing pipe 33; the overfire air introducing duct 35 is hermetically connected to the periphery of the premixed booster duct 33 and forms an overfire air introducing chamber 350 with the premixed booster duct 33, the overfire air introducing chamber 350 communicating with the outside through an overfire air introducing hole 351; the outer tube 36 of the flashback chamber is hermetically connected with the secondary air introducing tube 35 and forms a flashback chamber 360 with the inner burner 34, and the flashback chamber 360 is communicated with the secondary air introducing chamber 350; the burner fire head 37 is hermetically connected with the external tube 36 of the back combustion chamber, and a combustion chamber 370 is formed at the air outlet of the internal fire nozzle 34, the combustion chamber 370 is communicated with the back combustion chamber 360 and is provided with a tapered flame outlet 371; the primary air adjusting ring 38 is in threaded connection with the periphery of the ejector 32, and is used for adjusting and shielding the primary air introducing hole 321 through threads so as to adjust the opening degree of the primary air introducing hole 321; the overgrate air adjusting ring 39 is screwed to the periphery of the overgrate air introducing pipe 35 for shielding the overgrate air introducing hole 351 to adjust the opening degree of the overgrate air introducing hole 351. The high temperature burner 3 can automatically adjust the combustion air amount sucked into the burner according to the change of the fuel flow through the primary air introducing hole 321 and the secondary air introducing hole 351, and the high temperature burner 3 is provided with a primary air adjusting ring 38 and a secondary air adjusting ring 39 for adjusting the opening degree of the introducing holes; the combustion intensity can be adjusted by adjusting the primary air adjusting ring 38, that is, under the condition that the fuel flow is unchanged, the size of flame and the combustion temperature can be changed, and the combustion temperature can be adjusted within the range of 1000-1480 ℃; the adjustment of the secondary air adjusting ring 39 can adjust the air coefficient in the high temperature combustor 3 to adapt to the firing atmosphere in the kiln.
In order to improve the gasification effect of liquid methanol, the electrically heated methanol fuel phase changer 2 is a soaking block which pours the metal armored electric heating pipe and the reinforced heat exchange type gasification pipe together by using aluminum alloy, the aluminum alloy has good heat conduction and small thermal inertia, can avoid the electric heating pipe and the heat exchange pipe from generating local high temperature, not only can prolong the service life of the electric heating pipe, but also can eliminate the carbon deposition phenomenon caused by the local high temperature of the gasification pipe, and the gasification does not carry liquid at all.
In order to make the flame more stable, the methanol fuel pump 1 is a quantitative output pump with variable quantity, and if the methanol fuel pump 1 does not receive an operating instruction of the controller 6 for changing the flow of the methanol fuel pump 1, the flow of the methanol fuel pumped by the methanol fuel pump 1 is very stable within an operating pressure range, and is independent of the resistance of the gasifier, so that the uniform gasification of the fuel is realized, and the combustion flame is more stable.
In a preferred embodiment of the high temperature burner 3, the hearth 40 of the ceramic kiln 4 is provided with a mounting hole 41, the high temperature burner 3 is disposed in the mounting hole 41, and the mounting hole 41 facilitates the installation of the high temperature burner 3 and at the same time facilitates the heat preservation of the high temperature burner 3. The burner fire head 37 and the inner fire nozzle 34 are made of corundum ceramics, the fuel inlet, the ejector 32, the premixing pressure increasing pipe 33, the secondary air inlet pipe 35, the back combustion chamber outer pipe 36, the primary air adjusting ring 38 and the secondary air adjusting ring 39 are made of stainless steel, and the high-temperature burner 3 is resistant to high temperature integrally, good in thermal shock and long in service life.
The temperature sensor 5 is preferably a thermocouple, the monitoring and the transmission of the temperature of the ceramic kiln 4 are realized through the thermocouple, the cost is low, and the use is convenient.
The utility model discloses can adapt to various types of box kiln, shuttle kiln and some types of tunnel cave, its single methyl alcohol high temperature combustor 3's rated power all is the same, according to the various types and the capacity of pottery calcining kiln, the quantity of the combustor of installation on the kiln is different, and few only 2, more reach 100, generally with 8, 16, 24, 32 combustors in large numbers; the electrically heated methanol fuel phase changer 2 and the methanol fuel pump 1 of the embodiment can be manufactured into an integral component, so that the requirement of providing 2 or 4 high-temperature burners with gaseous methanol fuel can be met, and the pipeline of the gas-phase methanol fuel conveying pipe 20 is prevented from being too long; one kiln can be provided with a plurality of integrated components for phase change of the methanol fuel according to the number of the required high-temperature burners, and the controller 5 of the combustion system only needs one integrated component no matter how many integrated components are provided.
The utility model discloses the theory of operation as follows: after the system is started, the combustion system controller 6 outputs a heating instruction to the electrically heated methanol fuel phase changer 2, the electrically heated methanol fuel phase changer 2 starts preheating, and when the preheating is carried out to the set phase change temperature, the methanol fuel phase changer 2 enters a constant temperature state; before the preheating is finished, the methanol fuel pump 1 cannot be operated automatically or manually, and the methanol fuel pump 1 can be started after the methanol fuel phase changer 2 is preheated successfully and enters a constant temperature state; methanol liquid fuel from a fuel storage tank enters a methanol fuel pump 1 from a fuel inlet connecting pipe 31, pressurized methanol liquid fuel pressurized by the methanol fuel pump 1 enters an electric heating methanol fuel phase changer 2 through an output pipe of the methanol fuel pump 1, and the methanol fuel in a liquid phase state is completely gasified into a gas phase state; then, the pressurized gaseous methanol fuel is delivered to each methanol fuel high-temperature combustor 3 through a gas-phase methanol fuel delivery pipe 20, ignition is carried out at a burner nozzle, and the high-temperature combustor 3 enters a normal combustion state; the temperature of a hearth 40 of a ceramic kiln 4 is gradually increased by high-temperature flue gas generated by burning of methanol fuel, a temperature sensor 5 detects a temperature signal in the hearth on line and transmits the temperature signal to a controller 6 in real time, the controller 6 adjusts the burning power of a high-temperature burner 3 to enable the hearth temperature to be the same as a set firing process temperature curve of a ceramic product, the temperature requirement of the process temperature curve is met, and the problems that the temperature application range of an electric heating ceramic kiln 4 system is small, the burning intensity of a natural gas or liquefied petroleum gas burning system is insufficient, burning is not stable and sufficient, and flame leaving and flameout are easy to occur are avoided;
when the ceramic kiln firing heating system using the methanol fuel works, the gaseous methanol nozzle 310 ejects fuel gas flow at a very high speed, the high-speed fuel gas flow generates negative pressure in the primary air injection chamber 320, air outside the primary air inlet hole 321 is injected into the primary air inlet hole, and the fuel gas and combustion-supporting air are intensively mixed at the throat 322 of the injector; the mixed combustible gas enters the premixing plenum chamber, the path is enlarged, the flow rate of the combustible gas is greatly reduced, the gas pressure is increased, then the combustible gas flows into the joint part of the flashback chamber 360 and the combustion chamber 370 from the inner burner 34, after ignition through manual or automatic ignition, premixed combustion flame is formed in combustion, and then the premixed combustion flame is ejected from a flame ejection port of the combustor at a high speed; when the flame is sprayed out at a high speed, negative pressure is generated in the flashback chamber 360, part of smoke generated by combustion is curled in the chamber, meanwhile, peripheral air is sucked into the flashback chamber 360 from the secondary air introduction hole 351 and is used as secondary combustion air to participate in combustion, namely, the flashback chamber 360 automatically keeps open fire during the combustion, the occurrence of flame-separating, flame-releasing and flameout faults can be completely avoided, and the combustor cannot flameout as long as fuel supply is not interrupted;
meanwhile, according to the requirement of the kiln on the flame combustion intensity of the burner, the primary air adjusting ring 38 can be rotated to adjust the opening of the primary air introducing hole 321, and the injection air inlet amount is changed, so that the premixing proportion of the primary air is changed; the higher the premixing proportion of primary air is, the higher the flame combustion intensity is, the higher the flame temperature is, the flame temperature can be adjusted between 1000 ℃ and 1450 ℃, and the combustion effect is greatly improved compared with the traditional gas kiln burner; meanwhile, the opening of the secondary air introducing hole 351 is adjusted by rotating the secondary air adjusting ring 39, so that the air inlet amount of the secondary air is changed, the optimal air-fuel ratio is achieved, the combustion efficiency is improved, the combustion products are cleaner, and the phenomena of coking and carbon deposition are avoided; the pressure in the premixing pressurizing chamber of the ceramic kiln firing heating system using the methanol fuel is high, and the flow speed of the mixed gas flowing out of the inner burner 34 is larger than the propagation speed of flame, so that the backfire fault cannot be caused.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A ceramic kiln firing heating system using methanol fuel is characterized by comprising a methanol fuel pump, a methanol fuel phase changer, a high-temperature burner, a ceramic kiln, a temperature sensor and a controller;
the methanol fuel pump is used for pressurizing methanol liquid;
the methanol fuel phase changer is connected with the methanol fuel pump through a pipeline and is used for gasifying the pressurized methanol liquid into gaseous methanol;
the high-temperature combustor is used for introducing gaseous methanol and combusting to heat the ceramic kiln;
the temperature sensor is used for detecting the temperature in the hearth of the ceramic kiln and feeding a temperature signal back to the controller;
the controller is used for sending a heating instruction to the methanol fuel phase converter, receiving a temperature signal of the temperature sensor and controlling the output flow of the methanol fuel pump so as to control the combustion power of the high-temperature combustor.
2. The ceramic kiln firing heating system using methanol fuel as claimed in claim 1, wherein the high temperature burner includes an inlet nozzle, an ejector, a premixed booster pipe, an inner burner, a secondary air introduction pipe, a recombustion chamber outer pipe, a burner fire head, a primary air adjusting ring and a secondary air adjusting ring;
the inlet connecting pipe is used for being connected with the methanol fuel phase-change device and inputting gaseous methanol, and the outlet of the inlet connecting pipe is connected with a gaseous methanol nozzle;
the ejector is hermetically connected with the inlet connecting pipe and is provided with a primary air ejection chamber communicated with the gaseous methanol nozzle, the primary air ejection chamber is communicated with the outside through a primary air introduction hole, and the primary air ejection chamber gradually shrinks and extends towards the outflow direction of methanol gas to form an ejector throat;
the premixing pressurization pipe is hermetically connected with the ejector and communicated with the throat of the ejector, and the gas flow path of the premixing pressurization pipe is larger than that of the throat of the ejector;
the inner fire nozzle is connected to the outlet of the premixing pressurizing pipe and is provided with an air outlet with the diameter smaller than that of the premixing pressurizing pipe;
the secondary air introducing pipe is hermetically connected to the periphery of the premixing pressurizing pipe and forms a secondary air introducing chamber with the premixing pressurizing pipe, and the secondary air introducing chamber is communicated with the outside through a secondary air introducing hole;
the outer pipe of the flashback chamber is hermetically connected with the secondary air introducing pipe and forms a flashback chamber with the inner flame nozzle, and the flashback chamber is communicated with the secondary air introducing chamber;
the burner fire head is hermetically connected with the external pipe of the flashback chamber, a combustion chamber is formed at the air outlet of the internal fire nozzle, and the combustion chamber is communicated with the flashback chamber and is provided with a gradually-reduced flame ejection port;
the primary air adjusting ring is in threaded connection with the periphery of the ejector and is used for shielding the primary air introducing hole so as to adjust the opening of the primary air introducing hole;
the secondary air adjusting ring is in threaded connection with the periphery of the secondary air introducing pipe and used for shielding the secondary air introducing hole to adjust the opening degree of the secondary air introducing hole.
3. The ceramic kiln firing heating system using methanol fuel of claim 1, wherein the methanol fuel phase changer is a soaking block pouring together a metal-clad electric heating pipe and a reinforced heat exchange type gasification pipe with aluminum alloy.
4. The ceramic kiln firing heating system using methanol fuel of claim 1, wherein the methanol fuel pump is a variable quantity constant delivery pump.
5. The ceramic kiln firing heating system using methanol fuel as claimed in claim 1, wherein the ceramic kiln hearth is provided with a mounting hole, and the high temperature burner is provided in the mounting hole.
6. The ceramic kiln firing heating system using methanol fuel of claim 1, wherein the methanol fuel pump is connected to a liquid methanol storage tank.
7. The firing and heating system of a ceramic kiln using methanol fuel as claimed in claim 2, wherein the burner head and the inner burner are made of corundum ceramic, and the inlet connection pipe, the injector, the pre-mixing booster pipe, the secondary air inlet pipe, the external pipe of the back combustion chamber, the primary air adjusting ring and the secondary air adjusting ring are made of stainless steel.
8. The ceramic kiln firing heating system using methanol fuel of claim 1, wherein the temperature sensor is a thermocouple.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122456307.0U CN217356869U (en) | 2021-10-12 | 2021-10-12 | Ceramic kiln firing heating system using methanol fuel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122456307.0U CN217356869U (en) | 2021-10-12 | 2021-10-12 | Ceramic kiln firing heating system using methanol fuel |
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| CN217356869U true CN217356869U (en) | 2022-09-02 |
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| CN202122456307.0U Active CN217356869U (en) | 2021-10-12 | 2021-10-12 | Ceramic kiln firing heating system using methanol fuel |
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| CN (1) | CN217356869U (en) |
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2021
- 2021-10-12 CN CN202122456307.0U patent/CN217356869U/en active Active
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