|
[China]
Trade Verify
Address: Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Contact name:Sandy Chen
Zhangjiagang HuaDong Boiler Co., Ltd. |
|
Verified Suppliers
|
|
|
Stainless Steel Twisted Tube Heat Exchanger Economizer Sprial Tube
Economizer / Heat exchanger Description
Heat exchanger is a device for transferring part of the heat from hot fluids to cold fluids. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production. Heat exchanger has been widely used in chemical production,as heater, cooler, condenser, evaporator and reboiler, etc..
The tube bundle of the heat exchanger is composed of a number of twisted flat tubes, and a plurality of steel hoops are arranged outside the tube bundle to enhance the stiffness of the tube bundle.Because of the special structure of the pipe, the fluid inside and outside the pipe is in spiral flow, and the heat exchange of the fluid on both sides is strengthened at the same time.The special choke coil structure outside the tube bundle overcomes the short flow phenomenon of heat transfer medium between the tube bundle and the inside of the shell.This heat exchanger without baffle plate, reduce the cost, reduce scaling and vibration, especially convenient for the existing shell and tube heat exchanger transformation, in chemical, petrochemical and other industries broad application prospects.
The manufacturing process of spiral flat pipe includes "flattening" and "hot twisting".The improved twist tube heat exchanger is as simple as the traditional shell and tube heat exchanger, but there are many exciting advances. It has obtained the following technical and economic benefits: improved heat transfer, reduced scaling, true countercurrent, reduced cost, no vibration, saving space, no baffle element.
Due to the unique structure of the tube, the tube and shell are in spiral motion at the same time, which promotes the degree of turbulence.The total heat transfer coefficient of the heat exchanger is 40% higher than that of the conventional heat exchanger, while the pressure drop is almost the same.When assembling heat exchanger, spiral flat tube and smooth tube can also be used.The heat exchanger is manufactured in strict accordance with ASME standards.Where shell and tube heat exchangers and conventional devices are used, such heat exchangers can be replaced.It can obtain the best value of common shell and tube heat exchanger and plate and frame heat transfer equipment, and has broad application prospect in chemical and petrochemical industry.
Specifications
| Description | Economizer |
| Material | Alloy steel, Carbon steel, SA210C ,SA213T22, etc. |
| Material standard | ASTM, EN or ISO etc. |
| Dimension | Customization |
| Weight | Min: 10 ton Max.:100 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 |
Application
During boiler operation in typical commercial and industrial applications, approximately 10-20% of the heating value of fuel is expelled with the stack gases to the atmosphere. Stack economizers are designed to recover significant amounts of this stack gas energy loss, thereby vastly improving boiler system efficiency. There are several considerations when selecting an economizer:
• Gas-side Pressure Drop. Added back-pressure on the boiler stack affects the combustion air fan throughput capability. The economizer and combustion air fan(s) must be sized properly in order to assure a suitable system operation and capacity.
• Feedwater Temperature. The feedwater to the economizer must be deaerated and the temperature setpoint minimally at 220oF to prevent tube corrosion.
• Water-side Pressure Drop. Feedwater pumps must be sized to accommodate the economizer pressure drop. Additionally, a continuous modulating feedwater system is required to ensure proper flow rates through the economizer.
Workshop
