Helical flat pipe for waste heat boiler

A waste heat boiler and flat tube technology, which is applied to tubular elements, heat exchange equipment, lighting and heating equipment, etc., can solve the problems of large potential for improvement of waste heat utilization efficiency and low utilization ratio of waste heat resources, and achieve compact structure and heat exchange efficiency. Improve and save material effect

Active Publication Date: 2010-10-20
NINGBO LIANTONG EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization ratio of waste heat resources in my country is low. The waste heat utilization rate of large iron and steel enterprises is about 30%-50%, and that of other industries is even lower. There is a great potential for improving waste heat utilization efficiency.

Method used

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  • Helical flat pipe for waste heat boiler
  • Helical flat pipe for waste heat boiler
  • Helical flat pipe for waste heat boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The spiral flat tube used in the waste heat boiler of the present invention includes a flat tube body 1, a first tube interface 1a that doubles as an inlet and a second tube interface 1b that doubles as an outlet located at both ends of the flat tube body 1, wherein: the flat tube body 1 It is fixedly installed in the heat exchange surface 2 in a ring or regular curve shape, and the flat tube body 1 includes at least one helical part, and the cross section of the helical part along the axis at any point is an ellipse or oval with a spiral gradient.

[0040] The spiral portion may be a left-handed portion 1c or a right-handed portion 1d. The helical part is based on a circular tube, which is twisted and shaped after being flattened. The cross-section of the helical part along the axis at any point is an ellipse or oval with a spiral gradient. A plurality of spiral parts can be arranged on the flat tube body 1 .

[0041] A transition section 1e can be provided between ea...

Embodiment 2

[0050] Figure 10 It is a structural schematic diagram of the application of the spiral flat tube in this embodiment to a flue-type waste heat boiler.

[0051] Such as Figure 10 As shown, the flue-type waste heat boiler is mainly composed of an economizer, a riser, a drum, a downcomer, a water protection section, an evaporator, a superheater and a chimney. The flue boiler is a water tube boiler. Water or steam flows in the furnace tube, and the flue gas flows in the flue outside the furnace tube. A coil composed of spiral flat tubes is installed in the economizer, water protection section, evaporator and superheater. tube group. The flue gas transfers heat to the water or steam inside the tube by scouring the outer surface of the tube.

[0052] During the working process, the water enters the economizer through the water supply pipe, and after being heated, it is sent to the drum, mixed with the pot water, and then goes down the downcomer to pass through the water protecti...

Embodiment 3

[0055] Figure 11 It is a structural schematic diagram of the application of the spiral flat tube in this embodiment to a shell-and-tube waste heat boiler.

[0056] Such as Figure 12 As shown, the shell-and-tube waste heat boiler body is mainly composed of front-end tube box 6, flue gas outlet 7, fixed tube plate 8, steam outlet 9, shell 10, baffle plate 11, tube bundle 12, floating tube plate 13, floating head cover 14 , Outer head cover 15, water inlet 16 and flue gas inlet 17 etc. are formed. The shell and tube waste heat boiler is a fire tube boiler, the flue gas flows in the furnace tube, and the water flows in the shell outside the tube. Heat is transferred through the tube wall to the water outside the tube.

[0057] The water enters the pot shell through the water supply pipe, and the water absorbs heat in the pot shell to form a steam-water mixture, which reaches the steam drum through the rising pipe, and the steam drum separates the water and steam. The separat...

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Abstract

The invention discloses a helical flat pipe for a waste heat boiler. The helical flat pipe comprises a flat pipe body, a first pipe port and a second pipe port, wherein the first pipe port and the second pipe port are positioned at the two ends of the flat pipe body; the first pipe port is also used as an inlet; the second pipe port is also used as an outlet; the flat pipe body is fixedly arranged in a heat exchange surface in the shape of a circle or regular curve and comprises at least one helical part; and the cross section at any mass point of the helical part along the axial line is an elliptical or long circular section with gradient helix. By using the helical flat pipe, the waste heat boiler has the advantages of compact structure, small size, convenient hanging, material saving, low manufacturing cost and the capability of greatly increasing the heat exchange efficiency; and thus the helical flat pipe can be widely applied to the industries such as petrochemical industry, power, steel and iron, non-ferrous metal, chemical industry, cement, building material, light industry, coal and the like.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a spiral flat tube used in a waste heat boiler. Background technique [0002] The Chinese government plans to reduce carbon emissions by 40%-45% by 2020, and is currently facing enormous pressure to reduce emissions. The government is implementing various policies that are conducive to energy conservation and emission reduction. Among them, waste heat recovery is an effective way to improve energy efficiency. The state has issued a number of policies to encourage enterprises to carry out waste heat recovery and utilization. Under the vigorous promotion of energy saving and environmental protection policies, the demand for waste heat boilers has grown rapidly, and the market capacity is huge. In 2008, the sales volume of domestic waste heat boiler enterprises was about 3.4 billion yuan. It is estimated that the domestic waste heat boiler market capacity will reach 28 billion yuan in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/42
CPCY02P20/10
Inventor 连海峰蔡丽萍
Owner NINGBO LIANTONG EQUIP MFG
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