CN208108051U - A kind of improvement boiler economizer - Google Patents
A kind of improvement boiler economizer Download PDFInfo
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- CN208108051U CN208108051U CN201721841781.2U CN201721841781U CN208108051U CN 208108051 U CN208108051 U CN 208108051U CN 201721841781 U CN201721841781 U CN 201721841781U CN 208108051 U CN208108051 U CN 208108051U
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- boiler economizer
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Abstract
The utility model relates to the boiler technology field of biological substance for combustion or rubbish, especially a kind of improvement boiler economizer.It causes to wear for the existing easy dust stratification in boiler economizer surface, the problems such as influencing economizer exchange capability of heat and boiler working efficiency, the utility model provides a kind of improvement boiler economizer, including several snakelike combs and matched tube panel is arranged in flue, the comb constitutes heat exchanger tube row along in-line arrangement, lateral pipeline section number is less than longitudinal pipeline section number in heat exchanger tube row, and the comb outer diameter is d, and the transverse pitch of adjacent tubular segments is S1And S1=（1.5~3）d.The utility model is recruited by in-line arrangement comb and to economizer pitch to be rectified and improved into effectivelying prevent grey dirty situation to be condensed in economizer wall surface, prevent economizer dust stratification and abrasion resulting from, it is ensured that economizer exchange capability of heat and keeps boiler working efficiency.
Description
Technical field
The utility model relates to the boiler technology field of biological substance for combustion or rubbish, especially a kind of improvement boiler saves coal
Device.
Background technique
Boiler is that economizer is corollary apparatus common in the actual motion of the boiler of large-scale biological substance for combustion or rubbish,
Loaded on boiler back end ductwork lower absorbent tail flue gas waste heat, for reducing flue gas exhaust gas temperature, reducing flue gas loss and section
Can, it improves boiler efficiency and all plays a significant role.Since the biomass or incineration firing ash fusion point of boiler combustion are low, the cigarette of generation
Contain large quantity of moisture, ash content in gas, and economizer wall surface can be condensed in rich in alkali metal such as potassium and sodium in ash with grey dirty situation,
To aggravating to deposit stifled ash, hindering to conduct heat and inducing high temperature corrosion.Existing economizer deposits surface in use and easily adheres to, accumulates greatly
The alkali metal salt and ash of block, and then the exchange capability of heat of economizer is greatly reduced, while increasing smoke flow resistance grinds economizer
Damage increases, and reduces boiler working efficiency.
Utility model content
The technical problems to be solved in the utility model and the technical assignment of proposition are to overcome existing boiler economizer surface easy
The problems such as dust stratification causes to wear, and influences economizer exchange capability of heat and boiler working efficiency, provides a kind of improvement boiler economizer, institute
It states boiler economizer grey dirt can be effectively prevented and be condensed in economizer wall surface, avoid the abrasion as caused by dust stratification and economizer is changed
The influence of thermal energy power, it is ensured that boiler working efficiency.
The utility model solves the technical solution that technical problem uses：A kind of improvement boiler economizer, including be arranged in cigarette
Several snakelike combs and matched tube panel in road, it is characterized in that the comb constitutes heat exchanger tube row, the heat exchange along in-line arrangement
Lateral pipeline section number is less than longitudinal pipeline section number in pipe row, and the comb outer diameter is d, and the transverse pitch of adjacent tubular segments is S1And S1=
（1.5~3）d.The utility model is recruited by in-line arrangement comb and to economizer pitch to be rectified and improved into effectivelying prevent grey dirty shape
Gesture is condensed in economizer wall surface, prevents economizer dust stratification and abrasion resulting from, it is ensured that economizer exchange capability of heat and holding pot
Furnace working efficiency.Comb is staggered in arrangement along in-line arrangement ratio can more mitigate abrasion, smoke flow resistance be reduced, for impurity ash content
The more biomass fuel of alkali metal is become apparent from using in-line arrangement effect；If economizer transverse pitch is too small will cause tube panel with
Channel narrows between tube panel lead to the heat exchange of tube panel so that the alkali metal salt and ash of bulk are easily adhered, accumulate and keep off on tube panel
Ability is greatly reduced and increases smoke flow resistance；The excessive amount it will cause flue arrangement heating surface of weak transverse pitch is reduced,
Flue effective rate of utilization reduces.In addition, economizer is arranged in convection pass, generally pipeloop is positioned to horizontal in favor of row
Water, flue gas from top to down, facilitate soot blowing and increase heat transfer temperature difference, this is the prior art.
As further improving and supplementing to above-mentioned technical proposal, the utility model uses following technical measures：It is described
When the content of alkali metal accounts for 3%~5% in fuel ash, S1=（1.5~2）d；Or in the fuel ash content of alkali metal account for 5%~
When 8%, S1=（2~2.5）d；Or in the fuel ash when content of alkali metal accounts for 8%~12%, S1=（2.5~3）d.Biomass pot
The content of the alkali metal such as potassium sodium substantially accounts for 10%~40% in furnace fuel ash, has larger impact to economizer transverse pitch, passes through
The boiler matching that the different biomass fuel of corresponding alkali metal contents does raw material is arranged in different pitches, have optimal accumulatingdust,
Abrasive effect.
The pipe thickness of the comb is in 4~8mm.Pipe thickness is limited between 4~8mm, can be greatly improved
The intensity and wearability of comb can be improved, while controlling manufacturing cost.
Runner latus rectum between the tube panel and tube panel is between 40~50mm.Runner latus rectum control between tube panel and tube panel
System keeps runner latus rectum between tube panel to make flue gas is smooth to flow through enough between 40~50mm, while avoiding runner latus rectum is excessive from making
Reducing at tube panel number influences economy.
Anti-friction protecting is arranged in every grade of the first flue gas windward side fitting for arriving third comb from top to bottom in the heat exchanger tube row
Watt, the center angle of anti-friction protecting watt and comb is 120 °.Fitting setting anti-friction protecting watt, anti-friction protecting on the flue gas windward side of comb
It watt can be effectively protected the lower comb of its covering, when manufacture should be combined closely using overlap joint electric welding with comb, prevent tilting and shadow
Ring heat transfer and concentrated wear；The anti-friction protecting watt abrasionproof effect of 120 ° of center angles setting is best.
The comb be light pipe or extended surface tube, and comb be 25~42mm of outer diameter seamless steel pipe bend made of it is snakelike
Pipe.Light tube outer surface is without fin, and extended surface tube is the finned light pipe in outer surface, and wherein the more single light pipe of extended surface tube has higher
Heat exchanger effectiveness and better heat transfer effect, but extended surface tube processing and manufacturing compared with light pipe complexity.
It is described improve boiler economizer further include between the elbow and the ipsilateral flue inner wall of elbow of coiled pipe every
Plate, the partition side are fixed in flue inner wall.Heat exchanger tube row and flue inner wall gap are adjusted by setting partition, is removed smoke
Corridor effect avoids local flue gas flow rate is excessive economizer surface is caused to wear.
The utility model is recruited by in-line arrangement comb and to economizer pitch to be rectified and improved into effectivelying prevent grey dirty situation
It is condensed in economizer wall surface, prevents economizer dust stratification and abrasion resulting from, it is ensured that economizer exchange capability of heat and holding boiler
Working efficiency.
Detailed description of the invention
Fig. 1：Comb in-line arrangement structural schematic diagram described in the utility model.
Fig. 2：Anti-friction protecting watt schematic diagram described in the utility model.
Fig. 3：Partition schematic diagram described in the utility model.
In figure：1. comb, 2. anti-friction protectings watt, 3. partitions, 4. flues.
Specific embodiment
Explanation and specific embodiment are described further the utility model with reference to the accompanying drawing.
As shown in Figures 1 to 3, a kind of improvement boiler economizer, including several snakelike combs 1 and mating are set in flue 4
Tube panel, the comb 1 constitutes heat exchanger tube row along in-line arrangement, and lateral pipeline section number is less than longitudinal pipe along heat exchanger tube row
Number of segment, 1 outer diameter of comb are d, and the transverse pitch of adjacent tubular segments is S1And S1=（1.5~3）d.The utility model passes through in-line
Arrangement comb and recruiting economizer pitch rectify and improve into, wherein comb is staggered in arrangement along in-line arrangement ratio can more mitigate abrasion,
Smoke flow resistance is reduced, the biomass fuel more for impurity ash content alkali metal is become apparent from using in-line arrangement effect；And
Economizer transverse pitch is too small to will cause channel narrows between tube panel and tube panel so that the alkali metal salt and ash of bulk be easily adhered,
It accumulates and keeps off on tube panel, the exchange capability of heat of tube panel is caused to be greatly reduced and increase smoke flow resistance, weak transverse pitch is excessive
It will cause the amount reductions of flue arrangement heating surface, and flue effective rate of utilization reduces, by limiting pipeline section number and adjacent tubular segments
Transverse pitch effectively prevent grey dirty situation to be condensed in economizer wall surface and dust stratification resulting from abrasion, guarantees economizer heat exchange
Ability and boiler working efficiency.
Further, when the content of alkali metal accounts for 3%~5% in the fuel ash, S1=（1.5~2）d；Or the fuel ash
When the content of middle alkali metal accounts for 5%~8%, S1=（2~2.5）d；Or in the fuel ash when content of alkali metal accounts for 8%~12%, S1
=（2.5~3）d.The content of the alkali metal such as potassium sodium substantially accounts for 10%~40% in biomass boiler fuel ash, laterally saves to economizer
Away from there is larger impact, matched by the boiler that the different biomass fuel of the corresponding alkali metal content of different pitches setting does raw material
Set has optimal accumulatingdust, abrasive effect.
Pipe thickness is limited between 4~8mm by the pipe thickness of the comb 1 in 4~8mm, can be greatly improved
The intensity and wearability of comb can be improved, while controlling manufacturing cost, pipe thickness is preferably 6mm in the present embodiment.
Runner latus rectum between the tube panel and tube panel is between 40~50mm.Runner latus rectum control between tube panel and tube panel
System keeps runner latus rectum between tube panel to make flue gas is smooth to flow through enough between 40~50mm, while avoiding runner latus rectum is excessive from making
Reducing at tube panel number influences economy, needs control flue gas mean flow rate in 8~8.5 m/s in actual use, also to avoid abrasion
It is excessive.
Anti-friction protecting is arranged in every grade of the first flue gas windward side fitting for arriving third comb 1 from top to bottom in the heat exchanger tube row
Watts 2, the center angle of anti-friction protecting watt 2 and comb 1 is 120 °.Fitting setting anti-friction protecting watt can be effective on comb flue gas windward side
The comb that ground protects its covering lower, when manufacture, should be combined closely using overlap joint electric welding with comb, influence to conduct heat to prevent from tilting
And concentrated wear；The anti-friction protecting watt abrasionproof effect of 120 ° of center angles setting is best.
The comb 1 be light pipe or extended surface tube, and comb 1 be 25~42mm of outer diameter seamless steel pipe bend made of it is snakelike
Pipe.Comb uses light pipe and extended surface tube, and is bent by seamless steel pipe snakelike, has an excellent heat transfer effect, in the present embodiment
Comb be preferably light pipe, the seamless steel pipe is manufactured with No. 20 carbon steels.
It is described improve boiler economizer further include between the elbow and ipsilateral 4 inner wall of flue of elbow of coiled pipe every
Plate 3,3 side of partition are fixed on 4 inner wall of flue.Heat exchanger tube row and flue inner wall gap are adjusted by setting partition, is eliminated
Smoke corridor effect avoids local flue gas flow rate is excessive economizer surface is caused to wear.
Claims (7)
1. a kind of improvement boiler economizer, including be arranged in flue（4）In several snakelike combs（1）It is special with matched tube panel
Sign is the comb（1）It constitutes heat exchanger tube along in-line arrangement to arrange, lateral pipeline section number is less than longitudinal pipe in the heat exchanger tube row
Number of segment, the comb（1）Outer diameter is d, and the transverse pitch of adjacent tubular segments is S1And S1=（1.5~3）d.
2. a kind of improvement boiler economizer according to claim 1, it is characterized in that economizer wall surface in use is solidifying
Fuel ash is tied, when the content of alkali metal accounts for 3%~5% in the fuel ash, S1=（1.5~2）d；Or alkali metal in the fuel ash
Content when accounting for 5%~8%, S1=（2~2.5）d；Or in fuel ash when the content of alkali metal accounts for 8%~12%, S1=（2.5~3）d.
3. a kind of improvement boiler economizer according to claim 1, it is characterized in that the comb（1）Pipe thickness 4
~8mm.
4. a kind of improvement boiler economizer according to claim 1, it is characterized in that the runner between the tube panel and tube panel
Latus rectum is between 40~50mm.
5. a kind of improvement boiler economizer according to claim 1, it is characterized in that in heat exchanger tube row every grade from upper
And lower first arrives third comb（1）Flue gas windward side fitting setting anti-friction protecting watt（2）, anti-friction protecting watt（2）And comb（1）In
Heart angle is 120 °.
6. a kind of improvement boiler economizer according to claim 1, it is characterized in that the comb（1）For light pipe or fin
Pipe, and comb（1）For 25~42mm of outer diameter seamless steel pipe bend made of coiled pipe.
7. a kind of improvement boiler economizer according to claim 6, it is characterized in that the improvement boiler economizer further includes
The flue ipsilateral set on the elbow and elbow of coiled pipe（4）Partition between inner wall（3）, the partition（3）Flue is fixed in side
（4）On inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721841781.2U CN208108051U (en) | 2017-12-25 | 2017-12-25 | A kind of improvement boiler economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721841781.2U CN208108051U (en) | 2017-12-25 | 2017-12-25 | A kind of improvement boiler economizer |
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| Publication Number | Publication Date |
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| CN208108051U true CN208108051U (en) | 2018-11-16 |
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| CN201721841781.2U Active CN208108051U (en) | 2017-12-25 | 2017-12-25 | A kind of improvement boiler economizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167800A (en) * | 2017-12-25 | 2018-06-15 | 浙江浙能技术研究院有限公司 | A kind of improvement boiler economizer |
-
2017
- 2017-12-25 CN CN201721841781.2U patent/CN208108051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167800A (en) * | 2017-12-25 | 2018-06-15 | 浙江浙能技术研究院有限公司 | A kind of improvement boiler economizer |
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