CN101614405A - The combustion control device of aluminium melting furnace - Google Patents
The combustion control device of aluminium melting furnace Download PDFInfo
- Publication number
- CN101614405A CN101614405A CN200910182023A CN200910182023A CN101614405A CN 101614405 A CN101614405 A CN 101614405A CN 200910182023 A CN200910182023 A CN 200910182023A CN 200910182023 A CN200910182023 A CN 200910182023A CN 101614405 A CN101614405 A CN 101614405A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- air
- flow orifice
- air inlet
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention relates to the combustion control device of aluminium melting furnace, on the natural gas air inlet pipeline of burner, the natural gas flow orifice is set, on the air inlet pipeline of burner, the air mass flow orifice plate is set, the air inlet of natural gas flow orifice inserts natural gas, the gas outlet is connected with the natural gas air inlet of burner by the natural gas actuator, the air inlet of air mass flow orifice plate inserts air, and the gas outlet is connected with the air inlet of burner by air actuators; Between the air inlet of natural gas flow orifice and gas outlet, the natural gas differential pressure transmitter is set, between the air inlet of air mass flow orifice plate and gas outlet, the differential air pressure transmitter is set, the holding wire of two differential pressure transmitters all inserts the PLC controller, and the holding wire of natural gas actuator and air actuators also all inserts the PLC controller.This technical scheme can be regulated the quality proportioning of air and natural gas, accurately controls the quantity combusted ratio of natural gas and air, and natural gas is fully burnt, and reaches best combustion position.
Description
Technical field
The present invention relates to the natural gas is the method for controlling combustion of the aluminium melting furnace of fuel, is specifically related to the combustion control device of natural gas and the accurate flowrate proportioning of air.
Background technology
Because the extensive use of natural gas, the mode of heating of present domestic aluminium melting furnace is mainly based on natural gas, generally originate as combustion-supporting oxygen with air, but except that containing oxygen, also have inert gases such as nitrogen in the air, fuel adopts dry gas (drying is after the desulfurization), and its main component is methane (CH4), if after the natural gas completing combustion, its equation is CH
4+ 2O
2==CO
2+ 2H
2O, its combustion product is carbon dioxide and water as can be seen, its combustion product does not constitute harm to human body.Insufficient if burn, have two kinds of situations, the one, if air excess then its product can contain nitrous oxide (N
2O), nitric oxide (NO), nitrogen trioxide (N
2O
3), nitrogen dioxide (NO
2), dinitrogen tetroxide (N
2O
4), dinitrogen pentoxide (N
2O
5) etc., nitrogen oxide is lighter to eyes and upper respiratory tract mucosa stimulation, invades the bronchiole and the alveolar in respiratory tract deep, can generate nitrite, can occur the pathology based on pulmonary edema when serious, causes methemoglobinemia and nervous centralis infringement symptom; The 2nd, its incomplete combustion if natural gas is excessive, product can produce carbon monoxide (CO), and cause energy waste.
Therefore, need be with natural gas and the fully accurate proportioning of air.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of combustion control device of accurate flowrate proportioning is provided, natural gas and the abundant proportioning of air can be guaranteed completing combustion.
Purpose of the present invention is achieved through the following technical solutions:
The combustion control device of aluminium melting furnace, characteristics are: on the natural gas air inlet pipeline of burner the natural gas flow orifice is set, on the air inlet pipeline of burner, the air mass flow orifice plate is set, the air inlet of described natural gas flow orifice inserts natural gas, the gas outlet of natural gas flow orifice is connected with the natural gas air inlet of burner by the natural gas actuator, the air inlet of described air mass flow orifice plate inserts air, and the gas outlet of air mass flow orifice plate is connected with the air inlet of burner by air actuators; In addition, between the air inlet of described natural gas flow orifice and gas outlet, the natural gas differential pressure transmitter is set, between the air inlet of described air mass flow orifice plate and gas outlet, the differential air pressure transmitter is set, the holding wire of the holding wire of described natural gas differential pressure transmitter and differential air pressure transmitter all inserts the PLC controller, and the holding wire of described natural gas actuator and the holding wire of air actuators also all insert the PLC controller.
Further, the combustion control device of above-mentioned aluminium melting furnace is installed thermocouple in natural gas flow orifice position, and the holding wire of thermocouple inserts the PLC controller.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
1. the present invention respectively installs a flow-through orifice of having demarcated in the laboratory on the natural gas of burner and air pipe line, demarcate the front and back pressure reduction of orifice plate in the laboratory, under certain state of temperature, under the certain situation of caliber, pressure reduction has determined the flow (being volume) of natural gas or air before and after it, thereby draw its quality, accurately measure required proportioning quality;
2. an actuator is respectively arranged before burner, and the quality proportioning that is used to regulate air and natural gas can be controlled the quantity combusted ratio of natural gas and air accurately, reaches clean-burning purpose;
3. before and after each flow-through orifice of natural gas and air, a differential pressure transmitter is installed, pressure reduction before and after being used for measuring; The control signal of actuator all inserts PLC before the differential pressure signal of natural gas and air pipe line, temperature signal, the burner, by CPU according to computing formula, internal arithmetic draws the thermic load that burner hearth needs, aperture by actuator before the adjusting burner is controlled burner at whole adjustable range 0%-100%, guarantee of the ratio work of the proportioning of whole process air and natural gas in setting, the control natural gas fully burns, and reaches best combustion position;
4. by the mensuration to combustion product, compare with the aluminium melting furnace that this control device is not installed, its NOx discharge capacity reduces more than 70%, and compliance with environmental protection requirements greatly reduces production cost; Be rated as have novelty, creationary good technology, simple and easy be suitable for, market application foreground is wide.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: the structural representation of apparatus of the present invention.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | Reference numeral | Implication |
| ??1 | The natural gas flow orifice | ??2 | The air mass flow orifice plate | ??3 | The natural gas actuator |
| ??4 | Air actuators | ??5 | The natural gas differential pressure transmitter | ??6 | The differential air pressure transmitter |
| ??7 | Burner | ??8 | The PLC controller | ??9 | Thermocouple |
| ??A | Gas inlet | ??B | Air intake |
The specific embodiment
Aluminium melting furnace adopts heat-accumulating burner that aluminium is carried out heat fused, and general two burners are a pair of, and it is how right that every stove can be installed, a burner combustion, and another burner smoke evacuation and accumulation of heat, thus arrive higher thermal efficient.For the combustion position of accurate control natural gas and air, must the checkout equipment that can measure its flow be installed on its pipeline separately, designed the control device of the abundant proportioning of a kind of natural gas and air, completing combustion.
As shown in Figure 1, the combustion control device of aluminium melting furnace, mainly comprise flow-through orifice, actuator, differential pressure transmitter and PLC controller, on the natural gas air inlet pipeline of burner 7, natural gas flow orifice 1 is set, on the air inlet pipeline of burner, air mass flow orifice plate 2 is set, the air inlet of natural gas flow orifice 1 is connected with gas inlet A, the gas outlet of natural gas flow orifice 1 is connected with the natural gas air inlet of burner 7 by natural gas actuator 3, the air inlet of air mass flow orifice plate 2 is connected with air intake B, and the gas outlet of air mass flow orifice plate 2 is connected by the air inlet of air actuators 4 with burner 7; In addition, between the air inlet of natural gas flow orifice 1 and gas outlet, natural gas differential pressure transmitter 5 is set, between the air inlet of air mass flow orifice plate 2 and gas outlet, differential air pressure transmitter 6 is set, the holding wire of the holding wire of natural gas differential pressure transmitter 5 and differential air pressure transmitter 6 all inserts PLC controller 8, and the holding wire of the holding wire of natural gas actuator 3 and air actuators 4 also all inserts PLC controller 8.Thermocouple 9 also is installed in the orifice plate position, and the holding wire of thermocouple 9 inserts PLC controller 8.
It should be noted that, Fig. 1 has illustrated the structure chart of one of them burner natural gas and air burning control, on the natural gas of burner 7 and air pipe line, a flow-through orifice of having demarcated in the laboratory is installed respectively, be natural gas flow orifice 1 and air mass flow orifice plate 2, natural gas flow orifice 1 and the air mass flow orifice plate chambers of experimentizing 2 are demarcated, in the laboratory, demarcate the front and back pressure reduction of orifice plate, under certain state of temperature, under the certain situation of caliber, pressure reduction has determined the flow (being volume) of natural gas or air before and after it, thereby draw its quality, accurately measure required proportioning quality.
Natural gas flow orifice 1 and air mass flow orifice plate 2 be full of in the circular pipe of fluid throttling element has been installed after, when detected fluid flows through throttling element, a fluid stream will form local contraction in throttling place, mean flow rate increases in the contracted section thereby make, rise in throttling element upstream side static pressure, the downstream static pressure descends, so it is poor to produce static pressure in the upstream and downstream of throttling element side.Flow rate of fluid is big more, and the static pressure difference that produces before and after throttling element is big more, is certain functional relation between this static pressure difference and the flow, so weigh the flow size that fluid flows through throttling arrangement by measuring pressure reduction.
An electric performance device is respectively arranged before burner, i.e. natural gas actuator 3 and air actuators 4, the quality proportioning that is used to regulate air and natural gas can be controlled the quantity combusted ratio of natural gas and air accurately, reaches clean-burning purpose.Laboratory data is natural gas and the air condition of measuring under the laboratory environment temperature, environment temperature also is the factor of an influence in the application of actual field aluminium melting furnace, therefore, also be provided with a temperature measuring equipment that precision is higher at pipeline installing hole Board position, promptly thermocouple 9.In addition, also before and after natural gas and each orifice plate of air a differential pressure transmitter is installed, promptly natural gas differential pressure transmitter 5 and differential air pressure transmitter 6 are respectively applied for and measure natural gas flow orifice 1 and air mass flow orifice plate 2 front and back pressure reduction.The control signal of actuator all inserts PLC (Programmable Logic Controller) 8 before the differential pressure signal of natural gas and air pipe line, temperature signal, the burner, CPU is according to computing formula for process, internal arithmetic draws the thermic load that burner hearth needs, aperture by actuator before the adjusting burner is controlled burner at whole adjustable range 0%-100%, guarantee of the ratio work of the proportioning of whole process air and natural gas in setting, natural gas is fully burnt, reach best combustion position.By known pipeline caliber, calculate with breadboard formula, can calculate the quantity combusted of required natural gas and air easily.
By mensuration to combustion product, to compare with the aluminium melting furnace that this control device is not installed, its NOx discharge capacity reduces more than 70%, and compliance with environmental protection requirements greatly reduces production cost simultaneously, is the new design of a practicality.
What need understand is: above-mentioned explanation is not to be limitation of the present invention, and in the present invention conceived scope, the interpolation of being carried out, conversion, replacement etc. also should belong to protection scope of the present invention.
Claims (2)
1. the combustion control device of aluminium melting furnace, it is characterized in that: on the natural gas air inlet pipeline of burner, the natural gas flow orifice is set, on the air inlet pipeline of burner, the air mass flow orifice plate is set, the air inlet of described natural gas flow orifice inserts natural gas, the gas outlet of natural gas flow orifice is connected with the natural gas air inlet of burner by the natural gas actuator, the air inlet of described air mass flow orifice plate inserts air, and the gas outlet of air mass flow orifice plate is connected with the air inlet of burner by air actuators; In addition, between the air inlet of described natural gas flow orifice and gas outlet, the natural gas differential pressure transmitter is set, between the air inlet of described air mass flow orifice plate and gas outlet, the differential air pressure transmitter is set, the holding wire of the holding wire of described natural gas differential pressure transmitter and differential air pressure transmitter all inserts the PLC controller, and the holding wire of described natural gas actuator and the holding wire of air actuators also all insert the PLC controller.
2. the combustion control device of aluminium melting furnace according to claim 1 is characterized in that: thermocouple is installed, the holding wire access PLC controller of thermocouple in natural gas flow orifice position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182023A CN101614405A (en) | 2009-07-17 | 2009-07-17 | The combustion control device of aluminium melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182023A CN101614405A (en) | 2009-07-17 | 2009-07-17 | The combustion control device of aluminium melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101614405A true CN101614405A (en) | 2009-12-30 |
Family
ID=41494195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910182023A Pending CN101614405A (en) | 2009-07-17 | 2009-07-17 | The combustion control device of aluminium melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101614405A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221299A (en) * | 2011-03-30 | 2011-10-19 | 南京梅山冶金发展有限公司 | Annular sleeve lime kiln burner control device |
| CN102681554A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Control method for oxygen supply in smelting system |
| CN103184303A (en) * | 2013-03-29 | 2013-07-03 | 中冶南方工程技术有限公司 | Self-adaptive regulation control system for oxygen blowing pressure of converter and control method thereof |
| CN104266223A (en) * | 2014-09-28 | 2015-01-07 | 力聚热力设备科技有限公司 | Gas control device for controlling air-fuel ratio of burning through air flow meter |
| CN104930541A (en) * | 2015-05-27 | 2015-09-23 | 台嘉玻璃纤维有限公司 | Tank furnace dissolution burner control method |
-
2009
- 2009-07-17 CN CN200910182023A patent/CN101614405A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681554A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Control method for oxygen supply in smelting system |
| CN102681554B (en) * | 2011-03-10 | 2016-10-12 | 中国恩菲工程技术有限公司 | The control method of oxygen supply in smelting system |
| CN102221299A (en) * | 2011-03-30 | 2011-10-19 | 南京梅山冶金发展有限公司 | Annular sleeve lime kiln burner control device |
| CN102221299B (en) * | 2011-03-30 | 2014-03-26 | 南京梅山冶金发展有限公司 | Annular sleeve lime kiln burner control device |
| CN103184303A (en) * | 2013-03-29 | 2013-07-03 | 中冶南方工程技术有限公司 | Self-adaptive regulation control system for oxygen blowing pressure of converter and control method thereof |
| CN104266223A (en) * | 2014-09-28 | 2015-01-07 | 力聚热力设备科技有限公司 | Gas control device for controlling air-fuel ratio of burning through air flow meter |
| CN104930541A (en) * | 2015-05-27 | 2015-09-23 | 台嘉玻璃纤维有限公司 | Tank furnace dissolution burner control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101614405A (en) | The combustion control device of aluminium melting furnace | |
| CN101424404A (en) | Burner system and method of operating a burner for reduced nox emissions | |
| CN202709171U (en) | Combustion control system for coal-fired steam boiler | |
| CN202947133U (en) | Combustion device alternately using different gas fuels | |
| Lee et al. | Saving fuel consumption and reducing pollution emissions for industrial furnace | |
| CN203642454U (en) | Water heater and water pathway regulating mechanism thereof | |
| CN201837077U (en) | Novel energy-saving two-purpose wall-mounted gas boiler | |
| CN104456947B (en) | Heat accumulating type pure air heating system | |
| Mohammadpour et al. | Thermal performance and heat transfer characteristics analyses of oxy-biogas combustion in a swirl stabilized boiler under various oxidizing environments | |
| CN201184604Y (en) | Boiler oxygen-enriched combustion-supporting apparatus | |
| CN203337398U (en) | A combustor test furnace | |
| CN201496997U (en) | Novel combustion control device of aluminium smelting furnace | |
| CN101245912B (en) | Fuel oil/gas burner test stove | |
| CN105090949A (en) | Method for making air inflows of secondary air pipes of turbulent burner even and measuring device | |
| CN110953895A (en) | Calibration method of pulse type heating furnace | |
| CN201145403Y (en) | Hot-air furnace drying apparatus | |
| CN210662857U (en) | Combustion structure for industrial kiln | |
| CN202048572U (en) | Industrial gas burner | |
| CN106287804B (en) | combustion control system | |
| CN202419690U (en) | Optimized combustion control device for industrial furnace kiln | |
| CN105509298A (en) | Gas-induction self-adaptation premixed combustion heater arranged in waterway system | |
| CN215294933U (en) | Incinerator temperature and pressure control system for color coating of steel plate | |
| CN205560733U (en) | Low NOx asymmetric combustor | |
| CN205119124U (en) | Compensating system of burning control system and combustion control | |
| TWM474897U (en) | Water heater and water passage adjusting mechanism thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20091230 |