CN113754246A - Oxygen-enriched combustion control system and control method for glass kiln - Google Patents
Oxygen-enriched combustion control system and control method for glass kiln Download PDFInfo
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- CN113754246A CN113754246A CN202111044745.4A CN202111044745A CN113754246A CN 113754246 A CN113754246 A CN 113754246A CN 202111044745 A CN202111044745 A CN 202111044745A CN 113754246 A CN113754246 A CN 113754246A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 159
- 239000011521 glass Substances 0.000 title claims abstract description 57
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000001301 oxygen Substances 0.000 title claims abstract description 51
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 14
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000007789 gas Substances 0.000 claims description 61
- 230000001105 regulatory effect Effects 0.000 claims description 43
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 14
- 239000000779 smoke Substances 0.000 description 9
- 238000005338 heat storage Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000006060 molten glass Substances 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 239000005357 flat glass Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/237—Regenerators or recuperators specially adapted for glass-melting furnaces
-
- 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
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
-
- 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
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The application provides an oxygen-enriched combustion control system and a control method for a glass kiln, and belongs to the technical field of glass production. Wherein, glass kiln oxygen boosting burning control system includes: the combustion-supporting air main pipeline is provided with a first inlet end and a first outlet end which are communicated with each other, the first outlet end is connected with a plurality of combustion-supporting air branch pipelines, one end, far away from the first outlet end, of each combustion-supporting air branch pipeline is connected with a kiln for combustion, the pure oxygen input main pipeline is provided with a second inlet end and a second outlet end which are communicated with each other, the second outlet end is connected with a plurality of pure oxygen input branch pipelines, and at least one pure oxygen input branch pipeline is communicated with one combustion-supporting air branch pipeline; wherein, combustion-supporting air main pipeline is provided with first differential pressure gauge.
Description
Technical Field
The application relates to the technical field of glass production, in particular to a glass kiln oxygen-enriched combustion control system and a control method.
Background
When glass is produced, the oxidation-reduction atmosphere of the flame of the kiln fuel combustion needs to be controlled by combining with the special batch components of the cover plate glass, namely, the reduction atmosphere flame is adopted at the stage of batch feeding, so as to prevent the premature oxidation of the reducing components in the batch, and after the batch forms molten glass, the oxidation atmosphere flame is adopted, so as to prevent the surplus reducing components from remaining in the molten glass to form defects, influence the color and the physical and chemical properties of the cover plate glass, and further influence the productivity and the quality of the cover plate glass.
Because the redox atmosphere of the flame in the kiln is related to the oxygen content in the mixed gas obtained by mixing the combustion air and the oxygen content, but the control effect on the oxygen content in the prior art is poor, so that the productivity and the quality of the glass are low.
Disclosure of Invention
In view of this, the application provides a glass kiln oxygen-enriched combustion control system and a control method, and mainly solves the technical problems that: the control effect of the oxygen content is improved, and the productivity and the quality of the glass are further improved.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides an oxycombustion control system for a glass kiln, including: the combustion-supporting air main pipeline is provided with a first inlet end and a first outlet end which are communicated with each other, the first outlet end is connected with a plurality of combustion-supporting air branch pipelines, one end, far away from the first outlet end, of each combustion-supporting air branch pipeline is connected with a kiln for combustion, the pure oxygen is input into the main pipeline, the pure oxygen input main pipeline is provided with a second inlet end and a second outlet end which are communicated with each other, the second outlet end is connected with a plurality of pure oxygen input branch pipelines, and at least one pure oxygen input branch pipeline is communicated with one combustion-supporting air branch pipeline; wherein, combustion-supporting air main pipeline is provided with first differential pressure gauge.
In some modified embodiments of the present application, the first inlet end is connected to a centrifugal volute fan, the centrifugal volute fan delivers combustion air into the main combustion air conduit, and the frequency of the centrifugal volute fan is adjustable.
In some variant embodiments of the present application, said branch combustion air duct is provided with a first regulating valve; and/or the combustion air branch pipeline is provided with a first flowmeter.
In some modified embodiments of the present application, the pure oxygen input main pipeline is provided with a second regulating valve and a second differential pressure gauge, and the second regulating valve is a pressure regulating valve; and/or the pure oxygen input branch pipeline is provided with a third regulating valve and a second flow meter.
In some modified embodiments of the present application, the glass kiln oxycombustion control system may further include: the device comprises a first small furnace, a second small furnace and a first pipeline, wherein the first small furnace is arranged on one side of the kiln and communicated with the kiln, the second small furnace is arranged on the other side of the kiln and communicated with the kiln, two ends of the first pipeline are respectively communicated with the first small furnace and the second small furnace, and an opening is formed in the first pipeline; one end, far away from the first outlet end, of the combustion air branch pipeline is connected with a first connecting pipe and a second connecting pipe through a three-way valve, one end, deviating from the three-way valve, of the first connecting pipe is communicated with one end, connected with the first pipeline, of the first small furnace, and one end, deviating from the three-way valve, of the second connecting pipe is communicated with one end, connected with the first pipeline, of the second small furnace.
In some modified embodiments of the present application, the glass kiln oxycombustion control system may further include: the air conditioner comprises a first air exchanger and a second air exchanger, wherein the first air exchanger is arranged between the first connecting pipe and the first pipeline and is respectively communicated with the first connecting pipe and the first pipeline, and the second air exchanger is arranged between the second connecting pipe and the first pipeline and is respectively communicated with the second connecting pipe and the first pipeline.
In some modified embodiments of the present application, the glass kiln oxycombustion control system may further include: the first gas analyzer is arranged on one side, close to the first small furnace, of the first pipeline and communicated with the first pipeline, and the second gas analyzer is arranged on one side, close to the second small furnace, of the first pipeline and communicated with the first pipeline.
In some variations of the present application, the first conduit communicates with the first port via a first thermal storage member having a first thermal storage chamber, and the first conduit communicates with the second port via a second thermal storage member having a second thermal storage chamber.
In some modified embodiments of the present application, at least one of the main combustion air conduit, the branch combustion air conduit, the first connecting pipe, and the second connecting pipe is a carbon steel member; or, at least one of the main combustion air pipeline, the branch combustion air pipeline, the first connecting pipe and the second connecting pipe is a stainless steel part.
In a second aspect, based on the same inventive concept, an embodiment of the present application provides a glass kiln oxycombustion control method, where the glass kiln oxycombustion control method includes: the glass kiln oxygen-enriched combustion control system in the first aspect; adjusting the flow rate of combustion air in the main combustion air pipeline; and/or adjusting the flow rate of the combustion air in the combustion air branch pipeline; and/or adjusting the flow rate of the pure oxygen in the pure oxygen input main pipeline; and/or adjusting the flow of the pure oxygen in the pure oxygen input branch pipeline.
The embodiment of the application provides a glass kiln oxygen-enriched combustion control system and a control method, combustion air pressure in a combustion air main pipeline can be obtained through a first differential pressure gauge in the glass kiln oxygen-enriched combustion control system, and further an operator can adjust the flow of the combustion air at a first inlet end of the combustion air main pipeline according to the obtained combustion air pressure so as to adjust the combustion air amount in the combustion air main pipeline, and further adjust the combustion air amount of mixed gas in the combustion air branch pipeline, so that the oxygen content of the mixed gas in the combustion air branch pipeline can be adjusted, and therefore the control effect of the oxygen content can be improved.
The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clear and clear, and to implement the technical solutions according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
Drawings
FIG. 1 is a schematic view (partially) of an oxycombustion control system for a glass kiln according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of (a partial) oxycombustion control system of a glass kiln according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an oxycombustion control method for a glass kiln according to an embodiment of the present application.
Description of reference numerals:
100-glass kiln oxygen-enriched combustion control system, 10-combustion air main pipeline, 111-combustion air branch pipeline, 112-first differential pressure gauge, 113-first regulating valve, 114-first flowmeter, 30-pure oxygen input main pipeline, 311-pure oxygen input branch pipeline, 312-second regulating valve, 313-second differential pressure gauge, 314-third regulating valve, 315-second flowmeter, 411-first small furnace, 412-second small furnace, 413-first pipeline, 414-three-way valve, 415-first connecting pipe, 416-second connecting pipe, 417-first air exchanger, 418-second air exchanger, 419-first gas analyzer, 420-second gas analyzer, 421-first heat storage member, 422-second heat storage member, 423-second conduit, 424-first fuel inlet, 425-second fuel inlet, 426-melting tank, 50-kiln.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
First aspect
An embodiment of the present application provides an oxycombustion control system 100 for a glass kiln, and referring to fig. 1 and fig. 2, the oxycombustion control system 100 for a glass kiln includes: the combustion-supporting air main pipeline 10 and the pure oxygen input main pipeline 30 are connected, the combustion-supporting air main pipeline 10 is provided with a first inlet end and a first outlet end which are communicated with each other, the first outlet end is connected with a plurality of combustion-supporting air branch pipelines 111, one end, far away from the first outlet end, of each combustion-supporting air branch pipeline 111 is connected with the combustion kiln 50, the pure oxygen input main pipeline 30 is provided with a second inlet end and a second outlet end which are communicated with each other, the second outlet end is connected with a plurality of pure oxygen input branch pipelines 311, and at least one pure oxygen input branch pipeline 311 is communicated with one combustion-supporting air branch pipeline 111; wherein the main combustion air conduit 10 is provided with a first differential pressure gauge 112.
Specifically, the main combustion air duct 10 in the above is provided with a first inlet end and a first outlet end communicating with each other, the first outlet end being connected to a plurality of combustion air branch ducts 111, in other words, combustion air enters from the first inlet end and enters each combustion air branch duct 111 from the first outlet end, respectively; one end of each combustion air branch pipeline 111, which is far away from the first outlet end, is connected with the furnace 50 for combustion, that is, after entering the furnace 50, gas in each combustion air branch pipeline 111 is combusted by matching with fuel in the furnace 50, so that the batch in the furnace 50 can be melted into molten glass.
The pure oxygen input main pipeline 30 is provided with a second inlet end and a second outlet end which are communicated with each other, the second outlet end is connected with a plurality of pure oxygen input branch pipelines 311, in other words, pure oxygen enters from the second inlet end of the pure oxygen input main pipeline 30 and enters into each pure oxygen input branch pipeline 311 from the second outlet end; at least one pure oxygen input branch pipeline 311 is communicated with one combustion air branch pipeline 111, that is, one or more pure oxygen input branch pipelines 311 are communicated with one combustion air branch pipeline 111, so that the pure oxygen in the one or more pure oxygen input branch pipelines 311 can be mixed with the combustion air in the combustion air branch pipeline 111 to form a mixed gas, and the mixed gas enters the kiln 50 and then is matched with fuel combustion in the kiln 50 to melt the batch in the kiln 50 into molten glass, for example: the 1 pure oxygen input branch pipeline 311 is communicated with a combustion air branch pipeline 111, and pure oxygen is continuously input, intermittently input or temporarily not input into the combustion air branch pipeline 111 through the pure oxygen input branch pipeline 311 so as to adjust the oxygen content of the mixed gas; for another example: the 2 pure oxygen input branch pipelines 311 are communicated with one combustion air branch pipeline 111, and the two pure oxygen input branch pipelines 311 can be respectively controlled by two valves so that one or two pure oxygen input branch pipelines 311 can input pure oxygen into the combustion air branch pipeline 111 to adjust the oxygen content of the mixed gas. In practice, the source of oxygen input at the second inlet end of the pure oxygen input main conduit 30 may be obtained by separating air to prepare nitrogen and oxygen in oxygen.
The main combustion air pipe 10 in the above is provided with the first differential pressure gauge 112 to can monitor the combustion air pressure in the main combustion air pipe 10 in real time, and then make the operator can adjust the flow of the combustion air of the first inlet end of the main combustion air pipe 10 according to the acquired combustion air pressure so as to adjust the amount of the combustion air in the main combustion air pipe 10, and then adjust the amount of the combustion air of the mixed gas in the combustion air branch pipe 111, and thus can adjust the oxygen content of the mixed gas in the combustion air branch pipe 111.
In the embodiment, firstly, the pressure of the combustion air in the main combustion air pipeline can be acquired through the first differential pressure gauge, so that an operator can adjust the flow of the combustion air at the first inlet end of the main combustion air pipeline according to the acquired pressure of the combustion air to adjust the quantity of the combustion air in the main combustion air pipeline, and further adjust the quantity of the combustion air of the mixed gas in the branch combustion air pipeline, so that the oxygen content of the mixed gas in the branch combustion air pipeline can be adjusted, and the control effect of the oxygen content can be improved; secondly, the operator can select and control pure oxygen quantity to control the oxygen content of the mixed gas, and also can select and control combustion air quantity to control the oxygen content of the mixed gas, thereby providing more choices for the operator.
In one embodiment of the present application, referring to fig. 1, the first inlet end is connected to a centrifugal volute fan, the centrifugal volute fan delivers combustion air into the main combustion air conduit 10, and the frequency of the centrifugal volute fan is adjustable, so that an operator can adjust the power of the centrifugal volute fan according to the combustion air pressure in the main combustion air conduit 10 obtained by the first differential pressure gauge 112, so as to adjust the oxygen-containing ratio of the mixed gas in the combustion air branch conduit 111.
In one embodiment of the present application, as shown in fig. 1, the combustion air branch conduit 111 is provided with a first regulating valve 113; and/or the combustion air branch conduit 111 is provided with a first flow meter 114.
Specifically, the first regulating valve 113 may be controlled by a Disk Operating System (DCS System), that is, the DOC System may regulate the opening of the first regulating valve 113 to control the flow rate of the combustion air branch conduit 111, so as to regulate the oxygen content ratio of the mixed gas in the combustion air branch conduit 111; the first regulating valve 113 may be a flow regulating solenoid valve, or may be another regulating valve structure, and is not specifically limited herein; the first flow meter 114 in the above description is capable of monitoring the flow rate variation in the combustion air branch conduit 111 in real time, so that an operator can adjust the opening degree of the first regulating valve 113 and/or the frequency of the centrifugal volute fan according to the flow rate variation monitored by the first flow meter 114 in real time.
In one embodiment of the present application, referring to fig. 1, the main pure oxygen input conduit 30 is provided with a second regulating valve 312 and a second differential pressure gauge 313, the second regulating valve 312 being a pressure regulating valve; and/or the pure oxygen input branch 311 is provided with a third regulating valve 314 and a second flow meter 315.
Specifically, the second regulating valve 312 is a pressure regulating valve, the pressure of pure oxygen in the pure oxygen input main pipeline 30 can be 1.2-1.5 times greater than the pressure of combustion air in the combustion air main pipeline 10 through the regulation of the second regulating valve 312, and the purpose of regulating and controlling the pressure difference is to enable the pure oxygen to continuously enter the combustion air branch pipeline 111, so that the pure oxygen in the pure oxygen input main pipeline 30 and the combustion air in the combustion air main pipeline 10 can be mixed to form an oxygen-rich combustion-supporting medium and smoothly flow in the direction of the kiln 50; the second differential pressure gauge 313 can monitor the pure oxygen pressure in the pure oxygen input main pipeline 30 in real time, so that the operator can adjust the second regulating valve 312 according to the obtained pure oxygen pressure to control the pure oxygen flow in the pure oxygen input main pipeline 30, and further adjust the oxygen content of the mixed gas in the combustion air branch pipeline 111.
The third regulating valve 314 can regulate the flow of the pure oxygen in the pure oxygen input branch pipeline 311, and here, the third regulating valve 314 may be an electromagnetic valve for regulation, and may also be a regulating valve with other structures, and here, is not limited specifically; the second flow meter 315 can monitor the flow rate of the pure oxygen in the pure oxygen input branch pipeline 311 in real time, so that an operator can adjust the third adjusting valve 314 according to the obtained flow rate of the pure oxygen to adjust the pure oxygen amount of the mixed gas in the pure oxygen input branch pipeline 311, thereby adjusting the oxygen content of the mixed gas in the combustion air branch pipeline 111.
In an embodiment of the present application, referring to fig. 1 and 2, the glass kiln oxycombustion control system 100 may further include: the furnace comprises a first small furnace 411, a second small furnace 412 and a first pipeline 413, wherein the first small furnace 411 is arranged on one side of the kiln 50 and is communicated with the kiln 50, the second small furnace 412 is arranged on the other side of the kiln 50 and is communicated with the kiln 50, two ends of the first pipeline 413 are respectively communicated with the first small furnace 411 and the second small furnace 412, and the first pipeline 413 is provided with an opening; wherein, one end of the combustion air branch pipe 111 far away from the first outlet end is connected with a first connecting pipe 415 and a second connecting pipe 416 through a three-way valve 414, one end of the first connecting pipe 415 far away from the three-way valve 414 is communicated with one end of the first pipe 413 connected with the first small furnace 411, and one end of the second connecting pipe 416 far away from the three-way valve 414 is communicated with one end of the first pipe 413 connected with the second small furnace 412.
Specifically, the first small furnace 411 in the above description is communicated with one end of the combustion air branch conduit 111 away from the first outlet end through a first conduit 413, a first connecting pipe 415 and a three-way valve 414, so that the mixed gas in the combustion air branch conduit 111 enters the first small furnace 411 through the three-way valve 414, the first connecting pipe 415 and the first conduit 413, is fully mixed and enters the kiln 50; the second small furnace 412 is communicated with one end of the combustion air branch pipeline 111 far away from the first outlet end through a first pipeline 413, a second connecting pipe 416 and a three-way valve 414, so that the mixed gas in the combustion air branch pipeline 111 enters the second small furnace 412 through the three-way valve 414, the second connecting pipe 416 and the first pipeline 413, is fully mixed and enters the kiln 50; the opening of the first pipe 413 is used for discharging smoke generated by combustion in the kiln 50, wherein the opening of the first pipe 413 can be connected with the second pipe 423, so that the smoke in the first pipe 413 can be discharged through the second pipe 423, and here, the length and the bent shape of the second pipe 423 can be set according to the actual operation space. In a specific implementation, the fuel may be preset in the kiln 50, or at least one first fuel inlet 424 is provided on a side of the kiln 50 close to the first small furnace 411 and/or at least one second fuel inlet 425 is provided on a side of the kiln 50 close to the second small furnace 412. It will be appreciated that a melting tank 426 is provided within the furnace 50 to hold batch materials for making the glass.
In a using method, when a switch of the three-way valve 414 connected with the first connecting pipe 415 is opened, a switch of the three-way valve 414 connected with the second connecting pipe 416 is closed, and when a switch of the three-way valve 414 connected with the second connecting pipe 416 is opened, a switch of the three-way valve 414 connected with the first connecting pipe 415 is closed, and a switch between the three-way valve 414 and the second connecting pipe 416 is periodically switched to be opened, then in a first period, mixed gas in the combustion air branch pipe 111 enters the kiln 50 for combustion after passing through the three-way valve 414, the first connecting pipe 415, the first pipe 413 and the first small furnace 411, and combusted smoke enters the first pipe 413 from the second small furnace 412 and is discharged; in the second period, the mixed gas in the combustion air branch pipe 111 enters the kiln 50 for combustion through the three-way valve 414, the second connecting pipe 416, the first pipe 413 and the second small furnace 412, and the combustion smoke enters the first pipe 413 from the first small furnace 411 and is discharged. In the embodiment, the service life of the glass kiln oxygen-enriched combustion control system can be prolonged by periodic reversing.
In an embodiment of the present application, referring to fig. 1 and 2, the glass kiln oxycombustion control system 100 may further include: a first air exchanger 417 and a second air exchanger 418, the first air exchanger 417 being disposed between the first connection pipe 415 and the first duct 413 and communicating with the first connection pipe 415 and the first duct 413, respectively, and the second air exchanger 418 being disposed between the second connection pipe 416 and the first duct 413 and communicating with the second connection pipe 416 and the first duct 413, respectively.
Specifically, the first air exchanger 417 can control the connection and disconnection between the first connection pipe 415 and the first pipeline 413, and the second air exchanger 418 can control the connection and disconnection between the second connection pipe 416 and the first pipeline 413, so as to realize periodic commutation; the above embodiment can provide the operator with a second option, namely that the operator can perform the periodic commutation by operating the three-way valve, and also by operating the first air exchanger 417 and the second air exchanger 418.
In an embodiment of the present application, referring to fig. 1 and 2, the glass kiln oxycombustion control system 100 may further include: a first gas analyzer 419 and a second gas analyzer 420, wherein the first gas analyzer 419 is disposed on one side of the first pipe 413 close to the first small furnace 411 and is communicated with the first pipe 413, and the second gas analyzer 420 is disposed on one side of the first pipe 413 close to the second small furnace 412 and is communicated with the first pipe 413.
Specifically, due to the periodic reversal of the first and second small furnaces 411, 412, when the first small furnace 411 provides the mixed gas and the second small furnace 412 discharges the smoke, the first gas analyzer 419 near the first small furnace 411 can monitor the oxygen content ratio near the first small furnace 411 in the first pipeline 413 in real time, and the second gas analyzer 420 can monitor the oxygen content ratio and the carbon monoxide content ratio in the smoke discharged near the second small furnace 412 in the first pipeline 413 in real time, so that the combustion air excess coefficient a in the whole system can be calculated through data analysis, the fuel combustion condition and the flame atmosphere in the kiln 50 can be determined, and the oxygen content ratio in the smoke is generally specified to be greater than 8% as a strong oxidizing atmosphere, 2% to 8% as a weak oxidizing atmosphere, 1% to 2% as a neutral atmosphere, and less than 1% as a reducing atmosphere.
In this embodiment, an operator can adjust the flow rates in the main combustion air pipe 10, the branch combustion air pipe 111, the main pure oxygen input pipe 30, and the lift input branch pipe 311 according to the flame atmosphere obtained by the analysis, so as to improve the oxygen content control effect.
In one embodiment of the present application, as shown in fig. 1 and 2, the first pipe 413 and the first small furnace 411 are communicated with each other through a first heat accumulating member 421 having a first heat accumulating chamber, and the first pipe 413 and the second small furnace 412 are communicated with each other through a second heat accumulating member 422 having a second heat accumulating chamber, so that the mixed gas can be preheated in advance before entering the first small furnace 411, and similarly, the mixed gas can be preheated in advance before entering the second small furnace 412, thereby making combustion in the kiln 50 smoother.
In one embodiment of the present application, referring to fig. 1 and 2, at least one of the main combustion air conduit 10, the branch combustion air conduit 111, the first connection pipe 415, and the second connection pipe 416 is a carbon steel member; or, at least one of the main combustion air conduit 10, the branch combustion air conduit 111, the first connection pipe 415 and the second connection pipe 416 is a stainless steel member.
Specifically, at least one of the main combustion air pipeline 10, the branch combustion air pipeline 111, the first connecting pipe 415 and the second connecting pipe 416 is a carbon steel part, that is, one or more of the main combustion air pipeline 10, the branch combustion air pipeline 111, the first connecting pipe 415 and the second connecting pipe 416 are carbon steel parts, and the carbon steel parts can improve the structural strength of the glass kiln oxygen-enriched combustion control system 100 and prolong the service life of the glass kiln oxygen-enriched combustion control system 100; in the combustion-supporting air main pipeline 10, the combustion-supporting air branch pipeline 111, the first connecting pipe 415 and the second connecting pipe 416, at least one is a stainless steel piece, namely, one or more of the combustion-supporting air main pipeline 10, the combustion-supporting air branch pipeline 111, the first connecting pipe 415 and the second connecting pipe 416 are stainless steel pieces, and the stainless steel pieces can improve the structural strength of the glass kiln oxygen-enriched combustion control system 100 and prolong the service life of the glass kiln oxygen-enriched combustion control system 100.
In specific implementation, the main combustion air conduit 10, the branch combustion air conduit 111, the first connection pipe 415, and the second connection pipe 416 may be all circular pipes, and the diameters of the circular pipes may be calculated by the amount of combustion air required by fuel energy consumption, for example, by using natural gas as fuel in the kiln 50.
The fuel in the kiln 50 may be natural gas, liquefied petroleum gas, heavy oil, or the like.
In one embodiment of the present application, referring to fig. 1 and 2, a glass kiln oxycombustion control system 100 includes:
the combustion-supporting air main pipeline 10 is provided with a first inlet end and a first outlet end which are communicated with each other, the first inlet end is connected with a centrifugal volute fan, the first outlet end is connected with 3 combustion-supporting air branch pipelines 111, the combustion-supporting air main pipeline 10 is provided with a first differential pressure gauge 112, and the combustion-supporting air branch pipelines 111 are provided with a first regulating valve 113 and a first flow meter 114;
the pure oxygen input main pipeline 30 is provided with a second inlet end and a second outlet end which are communicated with each other, the second inlet end is connected with pure oxygen storage equipment, the second outlet end is connected with 3 pure oxygen input branch pipelines 311, one pure oxygen input branch pipeline 311 is communicated with one combustion air branch pipeline 111, the pure oxygen input main pipeline 30 is provided with a second regulating valve 312 and a second differential pressure gauge 313, the second regulating valve 312 is a pressure regulating valve, and the pure oxygen input branch pipeline 311 is provided with a third regulating valve 314 and a second flow meter 315;
the furnace 50, a first small furnace 411, a second small furnace 412, a first pipeline 413, a three-way valve 414, a first connecting pipe 415, a second connecting pipe 416, a first air exchanger 417, a second air exchanger 418, a first gas analyzer 419, a second gas analyzer 420, a first heat accumulation member 421 and a second heat accumulation member 422, a melting tank 426 for containing batch materials is arranged in the furnace 50, the first small furnace 411 is arranged on one side of the furnace 50 and communicated with the furnace 50, the second small furnace 412 is arranged on the other side of the furnace 50 and communicated with the furnace 50, a first fuel inlet 424 is arranged on one side of the furnace 50 close to the first small furnace 411, a second fuel inlet 425 is arranged on one side of the furnace 50 close to the second small furnace 412, a first connecting pipe 415 and a second three-way valve 416 are connected to one end of each combustion air branch pipeline 111 far away from the first outlet end through the three-way valve 414, one end of the first connecting pipe 415, far away from the three-way valve 414, is sequentially connected with the first air exchanger 417, the second connecting pipe 417, The first pipeline 413, the first heat storage member 421 and the first small furnace 411, one end of the second connecting pipe 416 departing from the three-way valve 414 is sequentially connected with the second air exchanger 418, the first pipeline 413, the second heat storage member 422 and the second small furnace 412, the first pipeline 413 is provided with an opening, the opening is connected with the second pipeline 423, the first gas analyzer 419 is arranged on one side of the first pipeline 413 close to the first small furnace 411 and is communicated with the first pipeline 413, and the second gas analyzer 420 is arranged on one side of the first pipeline 413 close to the second small furnace 412 and is communicated with the first pipeline 413.
Specifically, the centrifugal volute fan sends combustion air into a main combustion air pipeline 10 and then enters a branch combustion air pipeline 111, pure oxygen obtained through air separation enters a branch pure oxygen input pipeline 311 through a main pure oxygen input pipeline 30 and then is mixed with the combustion air in the branch combustion air pipeline 111 to form mixed gas, in a first period, a first air exchanger 417 is opened, a second air exchanger 418 is closed, the mixed gas enters the kiln 50 through a three-way valve 414, a first connecting pipe 415, the first air exchanger 417, a first pipeline 413, a first heat storage member 421 and a first small furnace 411 and then is combusted to form flame, so that the batch in the kiln 50 can be heated to realize glass melting, and combusted smoke enters a second heat storage member 422, a first pipeline 413 and a second pipeline 423 from a second small furnace 412 and then is discharged; in the second period, the first air exchanger 417 is closed and the second air exchanger 418 is opened, the mixed gas enters the kiln 50 through the three-way valve 414, the second connecting pipe 416, the second air exchanger 418, the first pipeline 413, the second heat storage member 421 and the second small furnace 412 to be combusted to form flame, so that the batch in the kiln 50 can be heated to melt glass, and the combusted smoke enters the first heat storage member 411, the first pipeline 413 and the second pipeline 423 from the first small furnace 411 and is discharged; the flow information of each position is obtained through the first differential pressure meter 112, the first flow meter 114, the second differential pressure meter 313 and the second flow meter 315, the flow is adjusted through the frequency adjustment of the centrifugal volute fan, the first regulating valve 113, the second regulating valve 312 and the third regulating valve 314 to realize the adjustment of the proportion of the oxygen content in the mixed gas, the proportion of the oxygen content before and after combustion in the system is detected in real time through the first gas analyzer 419 and the second gas analyzer 420 to judge the atmosphere of flame combustion, and then the flow is adjusted through the frequency adjustment of the centrifugal volute fan, the first regulating valve 113, the second regulating valve 312 and the third regulating valve 314 to readjust the proportion of the oxygen content in the mixed gas.
Second aspect of the invention
Based on the same inventive concept, referring to fig. 3, an embodiment of the present application provides a glass kiln oxygen-enriched combustion control method, including: the glass kiln oxycombustion control system 100 of the first aspect; 611, adjusting the flow rate of the combustion air in the main combustion air pipe 10; and/or, 612 adjusting the flow rate of the combustion air in the combustion air branch conduit 111; and/or, 613, adjusting the flow rate of the pure oxygen in the pure oxygen input main pipeline 30; and/or 614, adjusting the flow rate of the pure oxygen in the pure oxygen input branch pipeline 311.
Specifically, the adjustment of the oxygen content ratio in the mixed gas may be achieved by any one of the above adjustments 611, 612, 613, and 614, or the adjustment of the oxygen content ratio in the mixed gas may be achieved by a combination of a plurality of the adjustments 611, 612, 613, and 614, so that the effect of controlling the oxygen content may be improved by the multi-orientation adjustment.
It should be noted that the glass kiln oxycombustion control system in the glass kiln oxycombustion control method provided by the embodiment of the present application is similar to the description of the embodiment of the glass kiln oxycombustion control system in the first aspect, and has similar beneficial effects to the embodiment of the glass kiln oxycombustion control system in the first aspect. For the technical details which are not disclosed in the embodiment of the glass kiln oxygen-enriched combustion control method of the present application, please refer to the description of the embodiment of the glass kiln oxygen-enriched combustion control system of the present application for understanding, and the detailed description is omitted here.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, in the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "", "etc. indicate orientations or positional relationships that are based on the orientation or positional relationship illustrated in the drawings, which are used for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered as limiting.
In addition, in the present application, unless otherwise explicitly specified or limited, the terms "connected," "connected," and the like are to be construed broadly, e.g., as meaning both mechanically and electrically; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating between two elements or for interacting between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present application may be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An oxygen-enriched combustion control system of a glass kiln is characterized by comprising:
the combustion-supporting air main pipeline is provided with a first inlet end and a first outlet end which are communicated with each other, the first outlet end is connected with a plurality of combustion-supporting air branch pipelines, and one end of each combustion-supporting air branch pipeline, which is far away from the first outlet end, is connected with the combustion kiln;
the pure oxygen input main pipeline is provided with a second inlet end and a second outlet end which are communicated with each other, the second outlet end is connected with a plurality of pure oxygen input branch pipelines, and at least one pure oxygen input branch pipeline is communicated with one combustion air branch pipeline;
wherein, combustion-supporting air main pipeline is provided with first differential pressure gauge.
2. The glass kiln oxycombustion control system according to claim 1, characterized in that,
the first inlet end is connected with a centrifugal volute fan, the centrifugal volute fan conveys combustion air into the combustion air main pipeline, and the frequency of the centrifugal volute fan is adjustable.
3. The glass kiln oxycombustion control system according to claim 2, characterized in that,
the combustion-supporting air branch pipeline is provided with a first regulating valve; and/or the presence of a gas in the gas,
the combustion air branch pipeline is provided with a first flowmeter.
4. The glass kiln oxycombustion control system according to claim 1, characterized in that,
the pure oxygen input main pipeline is provided with a second regulating valve and a second differential pressure gauge, and the second regulating valve is a pressure regulating valve; and/or the presence of a gas in the gas,
the pure oxygen input branch pipeline is provided with a third regulating valve and a second flowmeter.
5. An oxycombustion control system for a glass kiln according to any of claims 1-4, characterized by further comprising:
the first small furnace is arranged on one side of the kiln and is communicated with the kiln;
the second small furnace is arranged on the other side of the kiln and is communicated with the kiln;
the two ends of the first pipeline are respectively communicated with the first small furnace and the second small furnace, and the first pipeline is provided with an opening;
one end, far away from the first outlet end, of the combustion air branch pipeline is connected with a first connecting pipe and a second connecting pipe through a three-way valve, one end, deviating from the three-way valve, of the first connecting pipe is communicated with one end, connected with the first pipeline, of the first small furnace, and one end, deviating from the three-way valve, of the second connecting pipe is communicated with one end, connected with the first pipeline, of the second small furnace.
6. The glass kiln oxycombustion control system according to claim 5, further comprising:
the first air exchanger is arranged between the first connecting pipe and the first pipeline and is respectively communicated with the first connecting pipe and the first pipeline;
and the second air exchanger is arranged between the second connecting pipe and the first pipeline and is respectively communicated with the second connecting pipe and the first pipeline.
7. The glass kiln oxycombustion control system according to claim 5, further comprising:
the first gas analyzer is arranged on one side, close to the first small furnace, of the first pipeline and is communicated with the first pipeline;
and the second gas analyzer is arranged on one side of the first pipeline close to the second small furnace and is communicated with the first pipeline.
8. The glass kiln oxycombustion control system according to claim 5, characterized in that,
the first pipeline is communicated with the first small furnace through a first heat accumulation piece with a first heat accumulation chamber;
the first pipeline is communicated with the second small furnace through a second heat accumulation piece with a second heat accumulation chamber.
9. The glass kiln oxycombustion control system according to claim 5, characterized in that,
at least one of the main combustion air pipeline, the branch combustion air pipeline, the first connecting pipe and the second connecting pipe is a carbon steel part; or the like, or, alternatively,
at least one of the main combustion air pipeline, the branch combustion air pipeline, the first connecting pipe and the second connecting pipe is a stainless steel part.
10. An oxygen-enriched combustion control method for a glass kiln is characterized by comprising the following steps:
the glass kiln oxycombustion control system of any one of claims 1-9;
adjusting the flow rate of combustion air in the main combustion air pipeline; and/or the presence of a gas in the gas,
adjusting the flow rate of the combustion air in the combustion air branch pipeline; and/or the presence of a gas in the gas,
adjusting the flow rate of pure oxygen in the pure oxygen input main pipeline; and/or the presence of a gas in the gas,
adjusting the flow of the pure oxygen in the pure oxygen input branch pipeline.
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Application publication date: 20211207 |