CN206600792U - A kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank - Google Patents

A kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank Download PDF

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CN206600792U
CN206600792U CN201720176125.9U CN201720176125U CN206600792U CN 206600792 U CN206600792 U CN 206600792U CN 201720176125 U CN201720176125 U CN 201720176125U CN 206600792 U CN206600792 U CN 206600792U
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gas
cigarette wind
pipeline
valve
windband
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王立臣
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王立臣
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Abstract

The utility model discloses a kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank, provided with fuel gas pipeline, air blower, the self cooling but low NO of cigarette wind premix tube bank;Blower inlet is connected with cigarette wind blender, and blower export, which is connected with cigarette wind gas mixing pipe road, cigarette wind gas mixing pipe road, is connected with the mixed gas injection device of cigarette wind;Low NO, which is provided with windband, windband, is provided with main exhaust gas nozzle, and air cooling tube bank is mixed provided with a circle cigarette wind around main exhaust gas nozzle, and cigarette wind, which mixes air cooling tube bank, directly to be goed deep into burner hearth;Burner is provided with burning torch;In windband gas import is mixed provided with cigarette wind;Main exhaust gas nozzle rear end is connected with the big fire fuel gas pipeline provided with big fire valve and the small fire fuel gas pipeline provided with small fire valve respectively;Burning torch termination is provided with flame detector.The device is applied to gas fired-boiler, with simple in construction, reasonable in design, and flame low temperature low nitrogen burning, device is cooled down automatically, the features such as being precisely controlled, it is ensured that the nitrogen oxide emission of gas fired-boiler is extremely low.

Description

A kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank
Technical field
The utility model is related to gas fired-boiler low-NO_x combustion technology field, more particularly to a kind of smoke and gas premix restrains self cooling But low nitrogen combustion apparatus.
Background technology
The nitrogen oxides produced in fuel combustion process is mainly NO and a small amount of NO2, and both is referred to as NOx.Combustion gas NO accounts for 90% in the nitrogen oxides generated during the burning, and remaining is NO2.Nitrogen oxides be to be formed photochemical fog and One major reason of acid rain.
The conditions such as NOx growing amount and discharge capacity and ignition temperature, excess air coefficient are relevant.In various combustion processes NOx generation dominant mechanism has three kinds, is thermal NO x, transient response type NOx and fuel type NOx respectively.Generated according to NOx Mechanism, the factor of influence NOx generation amount mainly has flame temperature, combustor section oxygen concentration, combustion product to be stopped in high-temperature region Time and the characteristic of fuel, general flame temperature are higher, and NOx generation is more, and vice versa.And reduce oxynitrides generation The approach of amount is mainly control flame temperature, prevents localized hyperthermia.
China's most area is influenceed in various degree by haze in recent years, and all parts of the country are all in improvement mist of making great efforts Haze.Formally put into effect on July 1st, 2015 new in pot Beijing《Emission standard of air pollutants for boilers》Newly constructed boiler discharges nitrogen oxygen Compound have to be lower than 30 milligrams/cubic metre.Existing boiler combustion machine structure type and control mode have air excess system Number is big, the problems such as local flame temperature is high so that discharged nitrous oxides are exceeded, therefore, burner structure reasonable in design, precisely Control ignition temperature is the key of gas fired-boiler low nitrogen burning.
Utility model content
The deficiency existed for existing gas fired-boiler combustor, the purpose of this utility model is:A kind of smoke and gas are provided The self cooling but low nitrogen combustion apparatus of premix tube bank, the device has simple in construction, reasonable in design, low nitrogen burning, the spy such as is precisely controlled Point, it is ensured that the nitrogen oxide emission of gas fired-boiler is extremely low.
In order to achieve the above object, the utility model adopts the following technical scheme that realization:
A kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank, it is characterised in that:Provided with fuel gas pipeline, air blower, The self cooling but low NO of cigarette wind premix tube bank;Blower inlet is connected with cigarette wind blender, and blower export is connected with cigarette wind and mixed Cigarette wind is connected with feed channel, cigarette wind gas mixing pipe road and mixes gas injection device;The low NO is provided with windband, windband provided with master Exhaust gas nozzle, the main exhaust gas nozzle passes through the ring flange of windband rear end, is fixedly installed in the middle of windband, is provided with its front end periphery The adjustable spinning disk in position, air cooling tube bank, the cigarette wind gas mixing pipe are mixed in windband around main exhaust gas nozzle provided with a circle cigarette wind Beam, which is uniformly arranged and fixed, is arranged on the periphery of main exhaust gas nozzle, and port is in windband thereafter, with entering the mixed gas of the cigarette wind in windband Communicate, its front end is stretched into boiler furnace;In windband gas import is mixed provided with cigarette wind;Windband is stretched out in the main exhaust gas nozzle rear end Outside ring flange, connected respectively with big fire fuel gas pipeline and small fire fuel gas pipeline, on big fire fuel gas pipeline and small fire fuel gas pipeline It is respectively equipped with valve and valve;Burning torch is additionally provided with the self cooling but low NO of cigarette wind premix tube bank, burning torch is arranged on cigarette The outside of wind gas mixing pipe beam;The rear end of the burning torch is also stretched out outside windband ring flange, and burning torch divides provided with three interfaces Lian Jie not spark plug interface, the igniting combustion supporting wind pipeline that igniting fuel gas pipeline and the mixed gas import of cigarette wind in windband are drawn, point Valve and valve are respectively equipped with fiery fuel gas pipeline and igniting combustion supporting wind pipeline, burning torch termination is provided with flame detector.
The utility model is further improved and the additional project of implementation is:
The blower inlet connects cigarette wind blender, and the cigarette wind blender is provided with air intlet and gas approach, empty Gas import is communicated with air, the smoke backflow pipeline of the flue extraction of gas approach connection boiler, the connection of cigarette wind mixer outlet Cigarette wind gas mixing pipe road;Smoke regulating valve provided with regulation flue gas flow on the smoke backflow pipeline;In the smoke backflow The minimum point of pipeline and cigarette wind gas mixing pipe road is equipped with draining valve;Gas is mixed in cigarette wind gas mixing pipe road provided with extraction cigarette wind to be back to Flue, to adjust the mixed gas injection device of cigarette wind initial pressure, the mixed gas injection device is provided with bleed valve;The air blower is provided with Air blower control cabinet.
The big fire fuel gas pipeline, small fire fuel gas pipeline, igniting fuel gas pipeline are connected with the main combustible pipe road of setting respectively, Main combustible pipe road is provided with manual modulation valve, double cut-out magnetic valves and gaseous-pressure switch.
The big fire valve, small fire valve, igniting burnt gas valve, double cut-out magnetic valves are controllable electromagnetic valve, flue gas Regulating valve is electric control valve, and the air blower sets frequency-variable controller, the electromagnetic valve, frequency-variable controller, flame sensor difference Switch control is carried out with the PLC of setting to be connected, PLC is provided with guidance panel.
Flow sensor and pressure sensor are equipped with the main combustible pipe road and smoke backflow pipeline;Set in burner hearth There is flame sensor, temperature sensor is provided with flue, the flow sensor, pressure sensor and temperature sensor are respectively Signal transmission is carried out with the PLC to be connected, and data memory module and data analysis module are provided with PLC, Pressure, flow to each pipeline carry out timing monitoring and data record storage, and are analyzed, when discovery wherein has pipeline or stove Thorax operation sends alarm signal when abnormal, when burner hearth is without flame, when gaseous-pressure, flue gas pressures are less than setting value, in report Fuel gas pipeline, cigarette wind gas mixing pipe road and air blower are immediately closed off while alert.
The PLC is additionally provided with wireless signal delivery and reception module, by the module by low nitrogen combustion apparatus Health data signal is sent in the Surveillance center of setting and operator on duty's mobile phone in good time, and receives Surveillance center's hair in good time The monitoring signal come, realizes unattended operation and remote auto monitoring.
Nitrogen content detector is provided with the outlet of the flue, the detector carries out signal with PLC and is connected, opening Nitrogen normal discharge value in flue gas is set during machine, during operation when detecting nitrogen content more than setting normal value, PLC is sent Alarm signal.
The mechanism of reduction discharged nitrous oxides of the present utility model:The cigarette wind set in the windband of this low nitrogen combustion apparatus is mixed Tracheae beam because its front end is longer than main exhaust gas nozzle, and stretches into burner hearth around main exhaust gas nozzle, and one is formed at combustion head The bundled tube combustion head surrounded by interval steel pipe, after natural gas is mixed with cigarette wind gaseous mixture in bundled tube combustion head, by steel pipe Stove chamber inner combustion is ejected at gap, because cigarette wind mixes the incorporation of gas, the fuel value of combustion gas is reduced, so as to reduce natural gas Ignition temperature.And gaseous mixture is burnt on tube bank surface, and the low temperature cigarette wind mixed gas being passed through in restraining in addition is taken away The heat that surface is produced is restrained during burning, the ignition temperature of combustion gas and tube bank surface flame temperature in burner hearth is reduce further, Greatly reduce the generation of nitrogen oxides, while carrying out cooling protection to tube bank steel pipe.
Compared with boiler combustion device in the prior art, smoke and gas premix cigarette wind premix tube bank of the present utility model is self cooling but Low nitrogen combustion apparatus and its combustion method have the following advantages that:
(1) natural gas that the cigarette wind gaseous mixture in windband is ejected with natural air gun is in the combustion head cavity that tube bank is surrounded Mixing, then sprays into burner hearth by tube gap and is fully burnt on tube bank surface, cigarette wind mixed gas drop is passed through in restraining in addition Temperature, the mixed gas after heating enters the heat that tube bank surface is produced burner hearth takes away burning simultaneously when, reduces the combustion of natural gas Temperature and surface flame temperature are burnt, greatly reduces the generation of nitrogen oxides, fundamentally controls the generation of nitrogen oxides, for Environment protection significance is great.
(2) backflow flue gas enters the quantity of heat convection that burner hearth improves boiler.
(3) frequency conversion air blower is arranged near stove tail smoke exhaust pipe, and peripheral hardware cigarette wind blender, reduces fan noise.
(4) it is simple in construction, it is reasonable in design, it is easy to operate, particularly automatically control degree high.
(5) operation of the present utility model is full intellectualized, there is provided complete control function and warning function, operation safety Coefficient is very high, can fully ensure the safety of production run.
Brief description of the drawings
Accompanying drawing 1 is overall structure diagram of the present utility model.
Accompanying drawing 2 is the structural representation of low NO of the present utility model.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings:
Embodiment:Refering to accompanying drawing 1,2, a kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank, provided with fuel gas pipeline, Air blower 2, self cooling but low NO 1 of cigarette wind premix tube bank;Blower inlet is connected with cigarette wind blender 3, blower export It is connected with cigarette wind gas mixing pipe road 9, cigarette wind gas mixing pipe road and is connected with the mixed gas injection device 7 of cigarette wind;The low NO is provided with windband 34, windband is interior to be provided with main exhaust gas nozzle 35, and the main exhaust gas nozzle passes through the ring flange of windband rear end, is fixedly installed in windband Between, the adjustable spinning disk 29 in position is provided with its front end periphery, gas is mixed provided with a circle cigarette wind around main exhaust gas nozzle in windband Cooling tube bundle 28, the cigarette wind gas mixing pipe beam, which is uniformly arranged and fixed, is arranged on the periphery of main exhaust gas nozzle, thereafter port in windband, Lead to entering the mixed gas phase of the cigarette wind in windband, its front end is stretched into the burner hearth of boiler 32;In windband gas import 25 is mixed provided with cigarette wind; The outside of windband ring flange 27 is stretched out in the main exhaust gas nozzle rear end, connects respectively with big fire fuel gas pipeline 12 and small fire fuel gas pipeline 22 It is logical, it is respectively equipped with valve 14 and valve 15 on big fire fuel gas pipeline and small fire fuel gas pipeline;The self cooling low nitrogen of cigarette wind premix tube bank Burning torch 26 is additionally provided with burner, burning torch is arranged on the outside of cigarette wind gas mixing pipe beam;The rear end of the burning torch is also stretched out The outside of windband ring flange 27, burning torch connects spark plug interface 4 respectively provided with three interfaces, igniting fuel gas pipeline 23 and by Cigarette wind in windband is mixed on the igniting combustion supporting wind pipeline 24 that gas import is drawn, igniting fuel gas pipeline and igniting combustion supporting wind pipeline respectively Provided with valve 16 and valve 11, burning torch termination is provided with flame detector.
The blower inlet connection cigarette wind blender 3, the cigarette wind blender is provided with air intlet and gas approach, empty Gas import is communicated with air, and the smoke backflow pipeline 10 of the extraction of flue 31 of gas approach connection boiler 32, cigarette wind blender goes out Mouth connection cigarette wind gas mixing pipe road 9;Smoke regulating valve 6 provided with regulation flue gas flow on the smoke backflow pipeline;Described The minimum point of smoke backflow pipeline and cigarette wind gas mixing pipe road is equipped with draining valve 5;Provided with extraction cigarette wind in cigarette wind gas mixing pipe road Mixed gas is back to flue 31, to adjust the mixed gas injection device 7 of cigarette wind initial pressure, and the mixed gas injection device is provided with bleed valve 8; The air blower is provided with air blower control cabinet.
The big fire fuel gas pipeline, small fire fuel gas pipeline, igniting fuel gas pipeline are connected with the main combustible pipe road of setting respectively, Main combustible pipe road is provided with manual modulation valve 17, double cut-out magnetic valves 13 and gaseous-pressure switch 21.The big fire valve, small fire Valve, igniting burnt gas valve, double cut-out magnetic valves are controllable electromagnetic valve, and smoke regulating valve is electric control valve, the air blast Machine sets frequency-variable controller, and the electromagnetic valve, frequency-variable controller, flame sensor are switched with the PLC of setting respectively Control connection, PLC is provided with guidance panel.
Flow sensor and pressure sensor are equipped with the main combustible pipe road and smoke backflow pipeline;Set in burner hearth There is flame sensor, temperature sensor is provided with flue, the flow sensor, pressure sensor and temperature sensor are respectively Signal transmission is carried out with the PLC to be connected, and data memory module and data analysis module are provided with PLC, Pressure, flow to each pipeline carry out timing monitoring and data record storage, and are analyzed, when discovery wherein has pipeline or stove Thorax operation sends alarm signal when abnormal, when burner hearth is without flame, when gaseous-pressure, flue gas pressures are less than setting value, in report Fuel gas pipeline, cigarette wind gas mixing pipe road and air blower are immediately closed off while alert.
The PLC is additionally provided with wireless signal delivery and reception module, by the module by low nitrogen combustion apparatus Health data signal is sent in the Surveillance center of setting and operator on duty's mobile phone in good time, and receives Surveillance center's hair in good time The monitoring signal come, realizes unattended operation and remote auto monitoring.
The combustion method of above-mentioned low nitrogen combustion apparatus, uses following steps:
1) start shooting:It is electric on PLC, guidance panel and air blower control cabinet, set combustion gas, cigarette wind to mix the normal pressure of gas Value, in 10-20kPa, is set to igniting operation by burner operation on guidance panel, it is ensured that smoke regulating valve is closed, starts Air blower is run;
2) fuel gas pipeline and cigarette wind gas mixing pipe road are opened:Regulating gas pressure 10-20kPa, opens and is set on combustion gas main pipeline The manual modulation valve put, combustion gas is entered in combustion gas main pipeline;Open the smoke regulating valve and air blower on smoke backflow pipe, cigarette Wind gas mixing pipe road is opened, and cigarette wind mixes gas and enters windband;
3) starting ignition process:Gas electromagnetic valve of being lighted a fire on gas ignition branch road is opened, igniting fuel gas pipeline is passed through combustion gas, Igniting mixed pneumoelectric magnet valv is opened, burning torch, burning torch operation are lighted in ignition transformer sparking;
4) ignition process success:After burning torch operation, PLC opens small fire gas electromagnetic valve;Combustion gas, mixed gas enter Windband and bundled tube combustion head, burning torch light small fire, and Fike detector detects after small fire operation, is considered as and lights a fire successfully, igniting Process terminates, and is transferred to step 6);
5) loss of ignition:Fike detector is not detected by small fire run signal in ignition process, that is, is considered as loss of ignition;PLC All magnetic valves are closed in controller control, cut off natural gas supply, and start alarm equipment alarm;Air blower purging burner hearth 5 minutes, It is then back to step 3), restart igniting process;
6) normal operation:After lighting a fire successfully, run 10-20 minutes in small fire gear, opening big fire by guidance panel fires Pneumoelectric magnet valve, big fire gear is set to by burner operation, and smoke regulating valve is opened, and is mixed while opening cigarette wind on gas injection pipeline Bleed valve, burner enters normal operation.
7) parking step:
(1) orderly shutdown:
Flame-out button, PLC control automatic self-closing gas pipeline solenoid are clicked on guidance panel, and is carried out Stop the operation of air blower after furnace purge operation, realize orderly shutdown;
(2) scram:
When low nitrogen combustion apparatus in the process of running, gaseous-pressure, cigarette wind initial pressure below or above setting value or When the fire extinguishing of point rifle, main fray-out of flame, gas leakage, PLC control automatic start alarm equipment alarm, and each electricity is closed automatically Magnet valve, cuts off fuel gas pipeline, closes air blower, stops burner operation, and is purged, and realizes safely scram.
It should be pointed out that on the premise of the utility model basic structure is not departed from, some improvement and change can also be made, The similar technical scheme of such modifications and variations also should be regarded as the protection domain of this patent.

Claims (7)

1. a kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank, it is characterised in that:Provided with fuel gas pipeline, air blower (2), The self cooling but low NO (1) of cigarette wind premix tube bank;Blower inlet is connected with cigarette wind blender (3), and blower export is connected with Cigarette wind gas mixing pipe road (9);The low NO, which is provided with windband (34), windband, is provided with main exhaust gas nozzle (35), the main combustion gas Jet pipe passes through the ring flange of windband rear end, is fixedly installed in the middle of windband, and the adjustable spinning disk in position is provided with its front end periphery (29) air cooling tube bank (28), is mixed provided with a circle cigarette wind around main exhaust gas nozzle in windband, the cigarette wind gas mixing pipe beam is uniformly arranged Row are fixedly installed on the periphery of main exhaust gas nozzle, and port is mixed gas phase with the cigarette wind that enters in windband and led in windband thereafter, before it End is stretched into boiler (32) burner hearth;In windband gas import (25) is mixed provided with cigarette wind;Windband is stretched out in the main exhaust gas nozzle rear end Outside ring flange (27), connected respectively with big fire fuel gas pipeline (12) and small fire fuel gas pipeline (22), big fire fuel gas pipeline and small Valve (14) and valve (15) are respectively equipped with fiery fuel gas pipeline;It is additionally provided with a little on the self cooling but low NO of cigarette wind premix tube bank Firelock (26), burning torch is arranged on the outside of cigarette wind gas mixing pipe beam;Windband ring flange (27) is also stretched out in the rear end of the burning torch Outside, burning torch connects spark plug interface (4) respectively provided with three interfaces, igniting fuel gas pipeline (23) and in windband Cigarette wind mixes and is respectively equipped with valve on the igniting combustion supporting wind pipeline (24) that gas import is drawn, igniting fuel gas pipeline and igniting combustion supporting wind pipeline Door (16) and valve (11), burning torch termination are provided with flame detector.
2. low nitrogen combustion apparatus according to claim 1, it is characterized in that:The cigarette wind mixing of the blower inlet connection Device is provided with air intlet and gas approach, and air intlet is communicated with air, and the flue (31) of gas approach connection boiler (32) draws The smoke backflow pipeline (10) gone out;Smoke regulating valve (6) provided with regulation flue gas flow on the smoke backflow pipeline;Institute The minimum point for stating smoke backflow pipeline and cigarette wind gas mixing pipe road is equipped with draining valve (5);Provided with extraction in cigarette wind gas mixing pipe road Cigarette wind mixes gas and is back to flue (31), to adjust the mixed gas injection device (7) of cigarette wind initial pressure, and the mixed gas injection device, which is provided with, to be drawn Air valve (8);The air blower is provided with air blower control cabinet.
3. low nitrogen combustion apparatus according to claim 1 or 2, it is characterized in that:The big fire fuel gas pipeline, small fire Gas Pipe Road, igniting fuel gas pipeline connects with the main combustible pipe road of setting respectively, and main combustible pipe road is provided with manual modulation valve (17), double cut Power off magnet valve (13) and gaseous-pressure switch (21).
4. low nitrogen combustion apparatus according to claim 3, it is characterized in that:The big fire valve, small fire valve, igniting combustion gas Valve, double cut-out magnetic valves are controllable electromagnetic valve, and smoke regulating valve is electric control valve, and the air blower sets VFC Device, the electromagnetic valve, frequency-variable controller, flame detector carry out switch control with the PLC of setting respectively and are connected, PLC Controller is provided with guidance panel.
5. low nitrogen combustion apparatus according to claim 4, it is characterized in that:On the main combustible pipe road and smoke backflow pipeline It is equipped with flow sensor and pressure sensor;Flame sensor is provided with burner hearth, temperature sensor, the stream are provided with flue Quantity sensor, pressure sensor and temperature sensor respectively carry out signal transmission with the PLC and are connected, in PLC controls Device processed is provided with data memory module and data analysis module, and the pressure, flow to each pipeline carry out timing monitoring and data note Address book stored, and being analyzed, when finding wherein to have pipeline or the abnormal data monitored of burner hearth operation and arrange parameter not phase Alarm signal is sent during symbol, it is vertical while alarm when gaseous-pressure, flue gas pressures are less than setting value when burner hearth is without flame Carve and close fuel gas pipeline, cigarette wind gas mixing pipe road.
6. low nitrogen combustion apparatus according to claim 5, it is characterized in that:The PLC is additionally provided with wireless signal hair Send and receiving module, be sent to the health data signal of low nitrogen combustion apparatus in the monitoring of setting in good time by the module On the heart and operator on duty's mobile phone, and the monitoring signal that Surveillance center sends is received in good time, realize unattended operation and remotely oneself Dynamic monitoring.
7. low nitrogen combustion apparatus according to claim 5, it is characterized in that:Nitrogen content is provided with the outlet of the flue (31) Detector, the detector carries out signal with PLC and is connected, the nitrogen normal discharge value in setting flue gas in start, during operation When detecting nitrogen content more than setting normal value, PLC sends alarm signal.
CN201720176125.9U 2017-02-27 2017-02-27 A kind of self cooling but low nitrogen combustion apparatus of smoke and gas premix tube bank Active CN206600792U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594716A (en) * 2016-12-05 2017-04-26 王立臣 Flue gas and air premixing pipe bundle self-cooling low-nitrogen combustion device and combustion method thereof
CN108800109A (en) * 2018-04-02 2018-11-13 安徽蓝天盈丰环保科技有限公司 A kind of device and method of pulverized-coal fired boiler supplying high temperature air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594716A (en) * 2016-12-05 2017-04-26 王立臣 Flue gas and air premixing pipe bundle self-cooling low-nitrogen combustion device and combustion method thereof
CN106594716B (en) * 2016-12-05 2018-11-27 王立臣 A kind of cigarette wind premix restrains self cooling but low nitrogen combustion apparatus and its combustion method
CN108800109A (en) * 2018-04-02 2018-11-13 安徽蓝天盈丰环保科技有限公司 A kind of device and method of pulverized-coal fired boiler supplying high temperature air

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