CN205245149U - Anti cold system of congealing of outer circulating combustion equipment of flue gas - Google Patents
Anti cold system of congealing of outer circulating combustion equipment of flue gas Download PDFInfo
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- CN205245149U CN205245149U CN201521136958.XU CN201521136958U CN205245149U CN 205245149 U CN205245149 U CN 205245149U CN 201521136958 U CN201521136958 U CN 201521136958U CN 205245149 U CN205245149 U CN 205245149U
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- flue
- backflow
- wind
- flue gas
- air
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Abstract
The utility model relates to an anti cold system of congealing of outer circulating combustion equipment of flue gas, it includes the muddy wind ware that main combustion apparatus is used for backward flow flue, the intake air's of flue gas extrinsic cycle fresh flue and mixes backward flow flue gas, air, mixes the wind ware and is connected with main combustion apparatus through mixing the wind channel, it still includes and carries out the equipment of preheating that heats to the combustion -supporting wind that gets into main combustion apparatus. The utility model provides an utilize the combustion system ubiquitous of flue gas extrinsic cycle technique to produce the condensation because of the flue -gas temperature reduces at present, cause main burner and air -blower humidity or ponding, bring kickback such as electrical apparatus short circuit, corruption, cause the influence to the normal work of main burner and air -blower, or even damage the problem of combustor, the operation of ensureing combustion apparatus and flue gas outer circulation system is reliable and stable.
Description
Technical field
The utility model relates to combustion system energy-conserving and emission-cutting technology, specifically a kind of condensation prevention system of flue gas outer circulation combustion apparatus.
Background technology
Along with the standard increasingly stringent of China to discharged nitrous oxides, combustion apparatus (boiler, industrial furnace, gas internal-combustion engine,Combustion gas turbine etc., lower with) low nitrogen burning technology and control nitrogen oxide technology and develop rapidly, the main technology adopting at presentBe divided into four large classes: circulation in fractional combustion, flue gas, premixed burning, flue gas outer circulation. Wherein, in fractional combustion, flue gasCirculation, premixed burning all need to change burner, can adopt these class methods for new upper combustion apparatus, but at presentQuantity huge with combustion apparatus, because change the sky high cost of burner and because the restriction of combustion apparatus body construction is ledThe effect that causes control nitrogen oxide is unsatisfactory. Therefore, for generally adopting outside flue gas at the reduction nitrogen oxide with combustion apparatusRecycle scheme, draws go back to combustion chamber by partial fume from smokejack, to reduce chamber temperature, thereby reduces heating power type in smoke evacuationThe scheme of oxynitrides content.
Because flue gas outer circulation mode need to reflux partial fume to mix with air, after high-temperature flue gas mixes with cold air, temperature willDecline to a great extent, produce condensation. Discharge in time condensed water even if mix the place that produces condensation with air at flue gas, still, byBe still saturated in mixed combustion air humidity, condensation again still can occur in the pipeline entering before burner, therefore,If mixed combustion air is not carried out to dehumidification treatments, will cause inner moist, the ponding of main burner and air blast, band incoming callThe consequences such as device short circuit, corrosion, impact the normal work of main burner and air blast, shorten burner service life, veryTo damaging burner.
Current flue gas outer circulation reduces the system of amount of nitrogen oxides, does not all solve due to flue gas condensing, and condensed water is by combustion-supportingWind is brought burner into, and the normal work to burner and life-span are caused the problem of tremendous influence. Based on above reason, present cigaretteThe system of gas outer circulation control flue gas nitrogen oxide content is urgently improved, and just can guarantee said system and combustion apparatus safety and stability fortuneOK.
Summary of the invention
The purpose of this utility model is to provide a kind of condensation prevention system of flue gas outer circulation combustion apparatus, is intended to solve current utilizationThe combustion system ubiquity of flue gas outside circulation is because of the problem of flue-gas temperature reduction generation condensation.
The technical solution of the utility model is as follows:
A condensation prevention system for flue gas outer circulation combustion apparatus, it comprise main combustion apparatus for the backflow flue of flue gas outer circulation,The wind-mixer of the fresh flue of air amount and mixing backflow flue gas, air, wind-mixer connects through mixing air channel and main combustion apparatusConnect, it also comprises the preheating equipment that the combustion air to entering main combustion apparatus heats.
Further, described preheating equipment is arranged on a place on backflow flue, fresh flue, wind-mixer and mixing air channel or manyPlace, is provided with condenser in one section of backflow flue between backflow flue gas outlet and the preheating equipment of main combustion apparatus, coldCondenser has the structure of draining outside backflow flue.
Further, described preheating equipment is the heat transmission equipment that adopts thermal medium indirect, described thermal medium comprise high-temperature water,One or more in high-temperature steam and heat transfer piece.
Further, described preheating equipment is for adopting the direct-fired combustion apparatus of thermal-flame, and preheating equipment comprises havingThe combustion chamber that preheats burner and place thereof of burner and air inlet, preheats burner and is connected with fuel channel.
Further, on described mixing air channel, be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment withMix air channel and be communicated with, wind-mixer is connected to backflow flue and mixes between air channel, is provided with smoke backflow amount and regulates on backflow flueValve, fresh flue is connected on wind-mixer, is provided with volume damper on fresh flue.
Further, on described wind-mixer, be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment is positioned atIn wind-mixer, wind-mixer is connected to backflow flue and mixes between air channel, is provided with smoke backflow adjustable valve on backflow flue,Fresh flue is connected on wind-mixer, is provided with volume damper on fresh flue.
Further, on described backflow flue, be provided with and preheat burner and smoke backflow adjustable valve, the combustion of preheating equipmentThe smoke outlet that burns chamber is communicated with backflow flue, and wind-mixer is connected to backflow flue and mixes between air channel, and fresh flue is connected toOn wind-mixer, on fresh flue, be provided with volume damper.
Further, on described fresh flue, be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment is with newAir channel is communicated with, and wind-mixer is connected to backflow flue and mixes between air channel, is provided with smoke backflow adjustable valve on backflow flue,Fresh flue is connected on wind-mixer, is provided with volume damper on fresh flue.
Further, preheating burner is not have the air suspended type ejection burner of air blast or for having the strong of air blastAir blast burner processed.
The utility model, on the existing basis that utilizes the main combustion apparatus that flue gas outside circulation controls discharged nitrous oxides, increasesAdd preheating equipment so that the combustion air that enters main combustion apparatus is heated, solve because of smoke backflow and meet after cold and cause condensation, makeBecome main burner and air blast humidity or ponding, bring the adverse consequences such as electrical short-circuit, corrosion, to main burner and air blastNormal work impacts, and even damages the problem of burner; Guarantee that combustion apparatus and the stable of flue gas external circulating system canLean on. And before combustion air heats, adopt condenser backflow flue gas is carried out to condensation to dewater, reduce water vapour in combustion airContent.
Method of the present utility model, is carried out condensation and combustion air is heated by backflow flue gas, and according to detecting main burnerLoad and heating after combustion air temperature, control heating power, promoted the temperature of combustion air, reduce water in combustion air and steamThe saturation degree of vapour, has stopped the problem of combustion air generation condensation, and guarantee flue gas external circulating system is effectively being controlled the same of nitrogen oxideTime, do not affect the stable operation of burner, do not affect the service life of burner, the security of operation of protection main burner.
Brief description of the drawings
Fig. 1 is the structural representation of preheating equipment of the present utility model while being forced-air blast type burner;
Fig. 2 is the structural representation of preheating equipment of the present utility model while being air suspended type ejection burner;
Fig. 3 is the schematic diagram that preheating equipment of the present utility model directly heats combustion air;
Fig. 4 is the schematic diagram of a kind of embodiment of heat transmission equipment indirect combustion air of the present utility model;
Fig. 5 is the schematic diagram of the another kind of embodiment of heat transmission equipment indirect combustion air of the present utility model;
Fig. 6 is that preheating equipment of the present utility model is at the scheme of installation mixing on air channel;
Fig. 7 is the scheme of installation of preheating equipment of the present utility model on wind-mixer;
Fig. 8 is the scheme of installation of preheating equipment of the present utility model on backflow flue;
Fig. 9 is the scheme of installation of preheating equipment of the present utility model on fresh flue.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model will be further described.
A condensation prevention system for flue gas outer circulation combustion apparatus, it comprises the backflow flue of main combustion apparatus for flue gas outer circulation4, the wind-mixer 2 of the fresh flue 3 of air amount and mixing backflow flue gas, air, wind-mixer 2 is through mixing air channels 5 with mainCombustion apparatus connects, on this basis, and the newly-increased preheating equipment heating entering the combustion air of main combustion apparatus of native system1. After being mixed with air by backflow flue gas, combustion air forms, thereby, can, to only to backflow flue gas heating, make mixed combustion-supportingWind reaches relevant temperature; Also can be that air to sucking from fresh flue 3 heats, make mixed combustion air reach correspondingTemperature; Can also be that directly heating mixes the combustion air in air channel 5, all be considered as that final combustion air is had to heating here, improveThe temperature of combustion air, avoid the water vapour condensation in combustion air.
Described preheating equipment 1 is arranged on backflow flue 4, fresh flue 3, wind-mixer 2 and mixes a place or the many places on air channel 5,To select different heating locations, or even on several heating locations, heat, so that enter the master of main combustion apparatus simultaneouslyThe temperature of the combustion air of burner meets the demands, and condensation neither occurs, also overtemperature not, the safe and stable operation of protection burner.For further stopping combustion air generation condensation, between the backflow flue gas outlet of main combustion apparatus and preheating equipment 1 one sectionIn backflow flue 4, be provided with condenser 7, backflow flue gas first carried out to condensation and dewater, condensed water is discharged to by its discharge structureOutside backflow flue 4.
Preheating equipment of the present utility model has two kinds to the mode of heating of medium: one is direct heating, combustion as shown in Figure 3Burning equipment; One is indirect, heat transmission equipment 15 as shown in Figure 4 and Figure 5.
In Fig. 3, preheating equipment 1 comprises the combustion chamber that preheats burner 12 and place thereof 11 with burner and air inlet,Preheat burner 12 and be connected with fuel channel, preheat burner 12 and burn in combustion chamber 11, the thermal-flame of burning andThe high-temperature flue gas producing at mixing chamber 13 places of main combustion apparatus directly and air to be heated, backflow flue gas or above-mentioned both mixAfter combustion air mix, reach the object of the temperature that improves air, backflow flue gas or both mixed combustion airs to be heated.The load of preheating equipment 1 regulates by fuel control valve 14, and fuel control valve 14 is subject to the load of main burner 6 and enters masterThe temperature control of the combustion air of burner 6.
In Fig. 4, employing be that the thermal medium of high-temperature water, high-temperature steam one class carries out heat exchange. For the high-temperature water, the high temperature that heatSteam etc. carry out heat through flow through heat transmission equipment 15 of pipeline with air, backflow flue gas or above-mentioned both mixed combustion airs to be heatedExchange, reach the object of the temperature that improves air, backflow flue gas or above-mentioned both mixed combustion airs to be heated. And at heightHeating load control valve 8 is installed on the pipeline that warm water, high-temperature steam are flowed through, and heating load control valve 8 is limited by main burner 6Load and the temperature that enters the medium of main burner 6.
In Fig. 5, adopt and will preheat the combustion chamber 11 at burner 12 places as the heat transfer piece of heat exchange. Preheat burner 12Burning in combustion chamber 11, the thermal-flame of burning and the high-temperature flue gas of generation by heat transmission equipment 15 and air to be heated,Backflow flue gas or above-mentioned both mixed combustion airs mix, and reach to improve air to be heated, backflow flue gas or above-mentioned both are mixedThe object of the temperature of the combustion air after closing. The load that preheats burner 12 regulates by fuel control valve 14, fuel control valve14 temperature that are controlled by the load of main burner 6 and enter the medium of main burner 6.
Have four kinds of modes according to the difference of heating location: 1, on mixing air channel 5, heat mixed combustion air; 2, mixedThe mixed combustion air of the interior heating of wind device 2; 3, on backflow flue 4, heat backflow flue gas; 4, on fresh flue 3, heat intoEnter the air of wind-mixer. The final effect of four kinds of heating locations is all the temperature in order to improve the combustion air that enters main burner 6.
According to the difference of heating location and medium, there are following four kinds of mounting structures:
Structure one: mixing heating on air channel 5, as shown in Figure 6.
On described mixing air channel 5, be provided with and preheat burner 12, the smoke outlet of the combustion chamber 11 of preheating equipment 1 withMix air channel 5 and be communicated with, wind-mixer 2 is connected to backflow flue 4 and mixes between air channel 5, on backflow flue 4, is provided with flue gasCapacity of returns control valve, fresh flue is connected on wind-mixer, is provided with volume damper on fresh flue. Backflow flue gas is first after drawingEnter condenser 7 condensations, be provided with the discharge structure of condensed water on condenser 7, condensed backflow flue gas is by backflow cigaretteRoad 4 enters in wind-mixer 2, and air enters wind-mixer 2 by fresh flue 3, backflow flue gas mixes in wind-mixer 2 with air,Condensation, condensed water is discharged in wind-mixer 2, and mixed combustion air preheated equipment 1 in mixing air channel 5 heats, pre-Firing equipment 1 regulates heating powers according to the load of main burner 6 and two of the temperature amount that enters the combustion air of main burner 6,The combustion air temperature of guaranteeing to enter main burner 6 is moderate, condensation does not occur and damage main burner 6, also can be because of excess TemperatureDamage main burner 6.
Structure two: heating in wind-mixer 2, as shown in Figure 7.
On described wind-mixer 2, be provided with and preheat burner 12, the smoke outlet of the combustion chamber 11 of preheating equipment 1 is positioned atIn wind-mixer 2, wind-mixer 1 is connected to backflow flue 4 and mixes between air channel 5, on backflow flue 4, is provided with smoke backflowAdjustable valve, fresh flue is connected on wind-mixer, is provided with volume damper on fresh flue. Backflow flue gas is introduced into after drawingCondenser 7 condensations are provided with the discharge structure of condensed water on condenser 7, and condensed backflow flue gas is by backflow flue 4Enter in wind-mixer 2, air enters wind-mixer 2 by fresh flue 3, and backflow flue gas mixes in wind-mixer 2 with air, coldSolidifying, condensed water is discharged in wind-mixer 2, and preheating equipment 1 is directly installed in wind-mixer 2, in wind-mixer 2, will mixCombustion air heating, preheating equipment 1 is according to the load of main burner 6 and the temperature two that enters the combustion air of main burner 6Individual amount regulates heating power, and the combustion air temperature of guaranteeing to enter main burner 6 is moderate, and there is not condensation and damage main burner 6,Also can not damage main burner 6 because of excess Temperature.
Structure three: heating on backflow flue 4, as shown in Figure 8.
On described backflow flue 4, be provided with and preheat burner 12 and smoke backflow adjustable valve, the combustion chamber of preheating equipment 111 smoke outlet is communicated with backflow flue 4, and wind-mixer 2 is connected to backflow flue 4 and mixes between air channel 5, fresh flue3 are connected on wind-mixer 2, on fresh flue 3, are provided with volume damper. It is cold that backflow flue gas is introduced into condenser 7 after drawingCoagulate, be provided with the discharge structure of condensed water on condenser 7, condensed backflow flue gas enters before wind-mixer 2, through adding in advanceBackflow flue gas after hot equipment 1 heating enters in wind-mixer 2 again, and air enters wind-mixer 2, backflow flue gas by fresh flue 3Mix in wind-mixer 2 with air, mixed combustion air enters main burner 6 and participates in burning, and preheating equipment 1 is according to masterThe load of burner 6 and two of the temperature amount that enters the combustion air of main burner 6 regulate and add heat, guarantee to enter main burner6 combustion air temperature is moderate, condensation does not occur and damage main burner 6, also can not damage main burner 6 because of excess Temperature.
Structure four: heating on fresh flue 3, as shown in Figure 9.
On described fresh flue 3, be provided with and preheat burner 12, the smoke outlet of the combustion chamber 11 of preheating equipment 1 is with newAir channel 3 is communicated with, and wind-mixer 2 is connected to backflow flue 4 and mixes between air channel 5, on backflow flue 4, is provided with smoke backflowAdjustable valve, fresh flue 3 is connected on wind-mixer 2, on fresh flue 3, is provided with volume damper. Backflow flue gas is after drawingBe introduced into condenser 7 condensations, be provided with the discharge structure of condensed water on condenser 7, condensed backflow flue gas is by refluxingFlue 4 enters in wind-mixer 2, and air is interior in fresh flue 3 first to be heated through preheating equipment, and the air after heating enters againEnter wind-mixer 2, backflow flue gas mixes in wind-mixer 2 with air, and mixed combustion air enters main burner 6 and participates in burning,Preheating equipment 1 regulates and adds heat according to the load of main burner 6 and two of the temperature amount that enters the combustion air of main burner 6,The combustion air temperature of guaranteeing to enter main burner 6 is moderate, condensation does not occur and damage main burner 6, also can be because of excess TemperatureDamage main burner 6.
Preheating equipment 1 of the present utility model includes but not limited to forced-air blast type burner (Fig. 1) with air blast 17, noThe forms such as the air suspended type ejection burner (Fig. 2) with air blast. In Fig. 1, on the fuel channel of preheating equipment 1, be provided withFuel control valve 14, the air inlet of its air blast 17 is provided with air door controllable register 16. In Fig. 2, the combustion of preheating equipment 1Fuel control valve 14 is installed on pipe material, and its air inlet is provided with air door controllable register 16. These are provided for regulating and preheatThe load of equipment 1.
In a word, for different main combustion apparatus types and different preheating equipment types, can first carry out backflow flue gasCondensation, rear selection is directly heated or indirect mode, also can select different heating locations, or even adds several simultaneouslyIn thermal site, heat, the combustion air temperature that enters burner to reach meets the demands, and condensation neither occurs, also overtemperature not,The safe and stable operation of protection burner.
The condensation prevention system of the corresponding above-mentioned flue gas outer circulation combustion apparatus of the utility model, can correspondingly propose a kind of condensation-proof method,It directly or indirectly heats the combustion air that enters main combustion apparatus, and heating power is according to the load of main combustion apparatus and/or helpThe temperature of combustion wind carries out automatically adjusting in real time, makes the temperature of combustion air higher than the condensation temperature of water vapour. Main combustion apparatus be boiler,The equipment such as industrial furnace, these equipment have flue gas external circulating system, for controlling the content of flue gas nitrogen oxide.
Claims (9)
1. a condensation prevention system for flue gas outer circulation combustion apparatus, comprise main combustion apparatus for the backflow flue of flue gas outer circulation,The wind-mixer of the fresh flue of air amount and mixing backflow flue gas, air, wind-mixer connects through mixing air channel and main combustion apparatusConnect, it is characterized in that: also comprise the preheating equipment that the combustion air to entering main combustion apparatus heats.
2. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 1, is characterized in that: described in preheatEquipment is arranged on a place or the many places on backflow flue, fresh flue, wind-mixer and mixing air channel, at the backflow cigarette of main combustion apparatusIn one section of backflow flue between gas outlet and preheating equipment, be provided with condenser, condenser has draining outside backflow flueStructure.
3. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 1 and 2, is characterized in that: described pre-Firing equipment is the heat transmission equipment that adopts thermal medium indirect, and described thermal medium comprises in high-temperature water, high-temperature steam and heat transfer pieceOne or more.
4. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 1 and 2, is characterized in that: described pre-Firing equipment is for adopting the direct-fired combustion apparatus of thermal-flame, and preheating equipment comprises having preheating of burner and air inletThe combustion chamber at burner and place thereof, preheats burner and is connected with fuel channel.
5. according to the condensation prevention system of the flue gas outer circulation combustion apparatus described in claim 4, it is characterized in that: described mixingOn air channel, be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment is communicated with mixing air channel, and wind-mixer connectsBe connected on backflow flue and mix between air channel, be provided with smoke backflow adjustable valve on backflow flue, fresh flue is connected to wind-mixerUpper, on fresh flue, be provided with volume damper.
6. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 4, is characterized in that: described wind-mixerOn be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment is positioned at wind-mixer, wind-mixer is connected to backFlow flue with mix between air channel, on backflow flue, be provided with smoke backflow adjustable valve, fresh flue is connected on wind-mixer, newOn air channel, be provided with volume damper.
7. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 4, is characterized in that: described backflow cigaretteOn road, be provided with and preheat burner and smoke backflow adjustable valve, the smoke outlet of the combustion chamber of preheating equipment and backflow cigaretteRoad is communicated with, and wind-mixer is connected to backflow flue and mixes between air channel, and fresh flue is connected on wind-mixer, on fresh flue, is provided withVolume damper.
8. the condensation prevention system of flue gas outer circulation combustion apparatus according to claim 4, is characterized in that: described fresh flueOn be provided with and preheat burner, the smoke outlet of the combustion chamber of preheating equipment is communicated with fresh flue, wind-mixer is connected to backFlow flue with mix between air channel, on backflow flue, be provided with smoke backflow adjustable valve, fresh flue is connected on wind-mixer, newOn air channel, be provided with volume damper.
9. according to the condensation prevention system of the flue gas outer circulation combustion apparatus described in any one in claim 5 to 8, it is characterized in that:Preheat burner and be air suspended type ejection burner or be forced-air blast formula burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136958.XU CN205245149U (en) | 2015-12-31 | 2015-12-31 | Anti cold system of congealing of outer circulating combustion equipment of flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136958.XU CN205245149U (en) | 2015-12-31 | 2015-12-31 | Anti cold system of congealing of outer circulating combustion equipment of flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205245149U true CN205245149U (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521136958.XU Withdrawn - After Issue CN205245149U (en) | 2015-12-31 | 2015-12-31 | Anti cold system of congealing of outer circulating combustion equipment of flue gas |
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| Country | Link |
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| CN (1) | CN205245149U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423289A (en) * | 2015-12-31 | 2016-03-23 | 重庆川然节能技术有限公司 | Condensation-resistant system and method of flue gas outer circulation combustion equipment |
| CN111928287A (en) * | 2020-09-16 | 2020-11-13 | 富士特锅炉(天津)有限公司 | Double-circulation flue gas condensation processor and method |
| CN113405279A (en) * | 2021-07-12 | 2021-09-17 | 辽宁绿源能源环保科技集团有限责任公司 | Low-nitrogen and concentrated-carbon combustion process method and system |
-
2015
- 2015-12-31 CN CN201521136958.XU patent/CN205245149U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423289A (en) * | 2015-12-31 | 2016-03-23 | 重庆川然节能技术有限公司 | Condensation-resistant system and method of flue gas outer circulation combustion equipment |
| CN111928287A (en) * | 2020-09-16 | 2020-11-13 | 富士特锅炉(天津)有限公司 | Double-circulation flue gas condensation processor and method |
| CN113405279A (en) * | 2021-07-12 | 2021-09-17 | 辽宁绿源能源环保科技集团有限责任公司 | Low-nitrogen and concentrated-carbon combustion process method and system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180518 |