Boiler Supply Casting High-Pressure Cast Iron Finned Economizers Tube 2.5 Meters Economizer Device Maintenance

• Customization: Available
• Certification: CE, ISO
• Customized: Customized
• Model NO.: SMQ-DZL-GG-HX25-2.5 SMQ-SZL-GG-HX60-4.0 HT200
• Surface Treatment: Painted
• Fuel: Oil, Coal, Gas
• Range of Applications: Power station, Life, Industrial
• Payment Method: Tt LC
• Price Terms: EXW Fob CFR CIF DDP
• Material: Cast Iron,Cast Steel,Mild Steelcarbon Steel
• Standard: Ht200
• Transport Package: Wooden Box, Iron Box, Customized
• Specification: 15-50 /50-200 /200-1000
• Trademark: JG
• Origin: China
• HS Code: 8402900000
• Production Capacity: 50000tons/Year

Product Description

Product Introduction
           The economizer is an important heat exchange component of the boiler, installed in the tail flue of the boiler, and uses the waste heat of the flue gas to preheat the boiler feedwater. Its main functions include:
1. Improve boiler efficiency: reduce exhaust gas temperature (usually by 50-150 ºC), recover waste heat from flue gas, and increase thermal efficiency by 5-15%.
2. Reduce fuel consumption: Preheated feedwater enters the steam drum, reducing the fuel required for heating.
3. Protect the boiler body: Avoid direct entry of low-temperature feedwater into the steam drum to reduce thermal stress impact.

Product parameters

product name	Economizer
material	Heat-resistant Steel,Cast Iron,Cast Steel,Mild steel,Carbon Steel,Alloy Steel, etc.
Material standards	ASME,SAE,NF EN,DIN EN,ISO,BS EN,etc
port	Qingdao Port, Tianjin Port, Guangdong Port.
delivery time	7~15 days
country of origin	Shandong, China
Specification drawing software	PDF, Auto CAD,Solidworks,JPG, ProE,etc.
Main production equipment	Wax injection, CNc-machine-center, Lathe, Miling machine,Driling machine,Boring Lathe,Grinding Machine, Heattreatment Furnace.
Heat treatment machine	Mesh-Belt-Furnace,Carburizing Quench Furnace,Chamer Furnace,etc.
Surface Treatment	Cold/Hot zn Plating,Blackening Treatment,Ni Plating,cr plating,Spraying Undercoat,Anti. Rust Paint,Surface Paint,Plastic Paint,Coated Anti-Rust Water,Anti-oil,etc.
Surface  Heat Treatment	Medium Frequence Quenching,High Frequence Quenching and Carburizing and Quenching,Oil Quenching,Waterquenching,Normalizing,Temper,Annealing,etc.
Dimensional Inspection	Calipers,Height Laugue,Micrometer Calipers,Inside Caliper Gauge,Angle and R Gauge,four coordinates measuringinstrument.
productivity	50000 tons /year
package	Wooden boxes, iron boxes, and others

Company Profile
               Shandong Jiaguang International is a high-tech enterprise focusing on the research and development, production, sales and service of boiler parts. The company has 30 years of manufacturing experience, as well as modern production base and senior technical team, to ensure to meet the needs of friends from all walks of life for products, and through the ISO9001 international quality system certification, CE certification, SGS origin certification.
The company's main products cover: Active grate, passive grate, grate pin, beam grate, scale grate, reciprocating grate, fixed grate, grate, chain grate, chain rod, scraper accessories, buried scraper chain, boiler hood, boiler tube, steel pipe, square tube, gear and other heat resistant, wear-resistant, corrosion resistant boiler accessories, widely used in electricity, heat, heating, paper mill, printing and dyeing factory, sugar factory, animal farming, Feed mill, chemical industry, etc. Products are exported to Vietnam, Singapore, Thailand, India, India, Pakistan, Tajikistan, Australia, New Zealand, Mexico, Russia, Malaysia, Philippines, South Africa and other more than 30 countries and regions.
It is committed to providing high-quality accessories and solutions for global industrial boilers, power station boilers, civil boilers and other fields, and has become a global benchmark enterprise in the field of boiler accessories.
Product Certification
Product packaging 
1. Principles of Packaging Design
Protection Shock proof and buffering: precision accessories (such as instruments and valves) need to be filled with foam, bubble film, pearl cotton, etc. to avoid damage caused by transportation shock.
Moisture and rust prevention: Metal components (such as pipelines and flanges) need to be coated with rust prevention oil and packaged with moisture-proof film or vacuum. Desiccant should be added during sea transportation.
Anti pressure and anti drop: Heavy accessories (such as burners and drums) are reinforced with wooden boxes or steel frames, indicating the load-bearing direction and stacking layer limits.

2. Standardization and identification
Comply with international transportation standards (such as ISO, ISTA), indicate weight, size, lifting point, "fragile", "moisture-proof", "upward" and other markings.
Dangerous accessories (such as fuel injectors) must be labeled with UN certification and comply with the International Maritime Dangerous Goods Code (IMDG).

3. Container division strategy
Small items (bolts, washers) should be packaged in a uniform size box to avoid loose parts; Large items (heat exchangers) are individually customized in wooden boxes with supporting frames inside.

Product transportation
Transportation mode selection
1. Shipping by sea
Suitable for bulk accessories such as steel plates and large pipelines, pay attention to container size (20GP/40HQ) and load balance.Sea freight requires anti salt spray treatment, with moisture-proof agents placed inside the container and sealed.

2. Land transportation
Heavy accessories (over 3 tons) require flatbed trucks or low chassis vehicles, and routes should be planned in advance to avoid height/weight restrictions.Cross border transportation inspection of various countries' requirements for wooden packaging (such as ISPM15 fumigation certificate).

3. Air freight
Urgent small items (electronic controllers) should be prioritized for air transportation, and the weight of each item should be controlled (usually<100kg) to reduce packaging weight and save costs.

FAQ:
Frequently Asked Questions about Boiler Economizers (Q&A)

Q1: What could be the possible reason for the sudden increase in temperature difference between the inlet and outlet of the economizer?
A1: 
Ash accumulation blockage: Ash accumulation on the flue gas side leads to a decrease in heat transfer efficiency (requiring soot blowing or mechanical cleaning).
Scale formation inside the pipe: Poor water quality causes scale deposition (chemical cleaning is required).
Abnormal flow: Water supply pump failure or insufficient valve opening (check water pump and pipeline).

Handling measures:
1. Perform reverse blowing operation first;
If it is ineffective, stop the machine and check the scaling inside the pipe;
3. Verify whether the water supply flow meets the standard.

Q2: How to deal with emergency situations when there is a leakage in the wall of the economizer tube?
A2:  
Temporary plugging:
Small leaks can be plugged with conical plugs;
The leakage module needs to be isolated for large leaks (close the inlet and outlet valves).
Fundamental solution:
Replace damaged pipe sections (prioritize corrosion-resistant materials such as ND steel);
Check if the water quality meets the standards (pH 8.5-9.2, dissolved oxygen<0.1mg/L).

Q3: Why is the low-temperature section of the economizer prone to corrosion? How to prevent it?
A3:  
reason:
Sulfur dioxide in flue gas condenses to form sulfuric acid (acid dew point corrosion);
The water supply temperature is lower than the acid dew point temperature (usually 120-150 ºC).
Preventive measures:
Raise the water supply temperature (by installing a heater or regenerative system);
Select acid resistant materials (such as stainless steel 09CrCuSb);
Spray anti-corrosion coating (enamel or aluminum infiltration) on the surface.

Q4: What could be the possible problem with the increased flue gas resistance of the economizer?
A4:  
Serious ash accumulation: high ash content in fuel or malfunction of soot blower;
Structural deformation: collapse of the pipeline due to high temperature;
Design flaw: High smoke flow rate or narrow channel.

resolvent:
Increase the frequency of soot blowing (recommended 1-2 times per shift);
Check if the pipe support structure is intact;
Check whether the cross-sectional area of the flue matches the boiler load.

Q5: How to determine if the economizer needs chemical cleaning?
A5:  
Cleaning signal:
Heat exchange efficiency decreases by more than 10%;
An increase of 20% in import and export pressure difference;
Local abnormal increase in pipe wall temperature.
Cleaning cycle:
Generally, once every 2-3 years (once a year when the water quality is poor).
Contact our professional engineering team promptly when encountering any questions!