품질 Waste Heat Recovery With Boiler Economizer Spiral Type Finned Tube Heat Exchanger 공장

Waste Heat Recovery With Boiler Economizer Spiral Type Finned Tube Heat Exchanger

Name: Waste Heat Recovery With Boiler Economizer Spiral Type Finned Tube Heat Exchanger
Brand: Zhangjiagang HuaDong Boiler Co., Ltd.
SKU: HDBBE0810
Price: 35.00 USD
Availability: InStock

브랜드 이름: HD Boiler

모델 번호: HDBBE0810

원산지: 중국 장수

인증: ASME, TUV, EN3834, ISO9001, Grade A

최소 주문 수량: 10 세트

가격: USD20,000 to USD50,000 per set

공급능력: 한 달에 300 세트

태그

보일러를 위한 절약가

발전소 절약가

보일러에서 에코노미세르

제품 세부정보

애플리케이션:	발전소 보일러, 열교환기	재료:	스테인리스, 보일러 강철, 강철 관
연료:	석탄 연소, 석유 연소, 가스 연소	표면 처리:	그린
구조:	수평의	색상:	사용자 정의
강조하다	spiral finned tube boiler economizer , waste heat recovery heat exchanger , boiler economizer with finned tubes

제품 설명

Waste Heat Recovery With Boiler Economizer Spiral Type Finned Tube Heat Exchanger

Economizer Functions

Spiral finned tube heat exchanger elements have three key advantages: they keep a strong heat transfer capacity, work really well at self-cleaning, and still do a great job of recovering waste heat from flue gas when boilers are being renovated.

Now, let’s talk about the numbers side: the convective heat transfer coefficient goes up when the fin pitch increases, but it goes down when the fin height or fin width gets bigger. And the overall heat transfer capacity depends on three things—fin efficiency, the convective heat transfer coefficient, and the finned ratio. Also, the pressure drop gets higher as the fin height and width increase.

The main job of an economizer is to soak up waste heat from flue gas to warm the boiler’s feed water. This does two big things: it lowers the exhaust gas temperature and makes the boiler more thermally efficient.

There’s more to it, too. When the feed water’s temperature is adjusted (both before and after it enters the drum), the temperature difference between the water pipes and the drum walls gets smaller. That, in turn, eases the thermal stress on the drum walls—which helps the drum last longer.

Another plus: the feed water gets heated up in the economizer first, before it reaches the evaporation heating surface. This means the water doesn’t need to absorb as much heat from the evaporation heating surface. It’s like using the economizer to take the place of part of that evaporation heating surface—and here’s the kicker: the cost of the economizer’s heating surface is way lower than the evaporation one. So if you’re thinking about boiler manufacturing costs, adding an economizer is a pretty economical move.

Economizer Types
If according to materials, economizers can be divided into steel tube economizers and iron economizers. At present, most large and medium volume boilers widely use steel tube made economizers, because they have high strength and reliable working ability, and are able to withstand impacts, meanwhile they have good performance of heat transfer, small structure and low cost. One weak point is bad corrusion resistance, but now the modern boiler feed water are strictly treated, so the problem is almost solved.
If according to heating extension of the working fluid, economizers can be divided into non-boiling and boiling types.
1. Boiling economizers: the outlet water temperature not only can reach the surnatured temperature, but also can make some water vapourized, the proportion is about 10-15% of total feed water, not more than 20% in case of much flow resistance caused to the working fluid.
2. Non-boiling economizers: the outlet temperature is 20-25 degrees lower than the boiling point under pressure given.
Most of medium-presssure boilers use boiling type economizers. This is because the latent heat of vaporization of water in medium-pressure boilers is high, and the heat of the heated water is smal. Thus it is necessary to send some water to be vaporized in boiler economizer so as to prevent unstable combusion in funaces and prevent increased consumption of metal in the heating surfaces as superheaters caused by too low outlet flue gas temperature. In addition, it can help to play the role of economizers.
Superhigh pressure boilers mostly use non-boiling type economizers. This is because when the pressure is higher, the latent heat of vaporization is decreased, while heat of the heated water is getting more, so it is necessary to send some water to be heated in water wall panels so as to prevent the slagging on the heating surfaces of the furnace outlets and the furnace inside caused by too high temperatures in furnaces and of outlet flue gas. So usually superhigh pressure boilers use non-boiling type economizers.
The main factor to consider which type of economizers is boiler's parameters. When the boiler parameters differ, the ratio of heat absorption needed in three stages to heat the working fluid make differences. So the corresponding arrangements of three heating surfaces need to change, too. To large units with high parameters, their evaporative heat absorption is less, while the heat absorption of water by heating, the heat absorption of steam by superheating, the heat absorption by reheating are quite big. Thus, non-boiling type economizers are the main type for superhigh pressure unit boilers.

Specifications

Description	Boiler economizer
Material	Alloy steel, Carbon steel, SA210C ,SA213T22, etc.
Material standard	ASTM, EN or ISO etc.
Dimension	Customization
Weight	Min: 10 ton Max.:1000 ton
Smelting Process:	EF+LF + VD
Process	Material→Ingot → Hot/Cold-Rolling→ Heat treatment (Normalizing+ tempering) → Inspection →rough machining→UT →2nd Heat treatment →finishing machining →Inspection
UT standard	ASTM A388 or EN10228, etc

Quality Control

1. Impact test and Strength calculation report with applied materials information.
2. 100%NDT(non-destructive inspection) report of steel plate, tube and electrode
3. X-ray, γ-ray and liquid penetrant test inspection report (welding seam): to ensure the quality of the entire boiler
4. Hydraulic test report: ensure the standard working pressure and safety

제품 하이라이트

Waste Heat Recovery With Boiler Economizer Spiral Type Finned Tube Heat Exchanger Economizer Functions Spiral finned tube heat exchanger elements have three key advantages: they keep a strong heat transfer capacity, work really well at self-cleaning, and still do a great job of recovering waste heat ...

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