CN205784781U - A kind of heat exchange element is the enclosed steam air heater of twisted elliptic tube - Google Patents
A kind of heat exchange element is the enclosed steam air heater of twisted elliptic tube Download PDFInfo
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- CN205784781U CN205784781U CN201620485576.6U CN201620485576U CN205784781U CN 205784781 U CN205784781 U CN 205784781U CN 201620485576 U CN201620485576 U CN 201620485576U CN 205784781 U CN205784781 U CN 205784781U
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- heat exchanger
- end heat
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- twisted elliptic
- elliptic tube
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Abstract
The utility model discloses the enclosed steam air heater that a kind of heat exchange element is twisted elliptic tube, it is characterized in that, including the hot end heat exchanger being arranged in boiler hot flue and the cool end heat exchanger being arranged in cold air duct, connected by pipeline between cool end heat exchanger and hot end heat exchanger, heat exchanger tube on described hot end heat exchanger and cool end heat exchanger is twisted elliptic tube, and twisted elliptic tube is the serpentine pipe that the straight tube that a kind of sectional area is oval distorts vertically.This utility model uses a kind of coefficient of heat transfer more than light pipe, is less likely to occur again the heat exchange element of dust stratification, fouling simultaneously, strengthens the exchange capability of heat of flue gas waste heat recovery apparatus, and reduce the dust stratification of heating surface.
Description
Technical field
This utility model relates to a kind of flue gas waste heat utilization device for boiler of power plant, particularly relates to a kind of heat exchange
Element is the enclosed steam air heater of twisted elliptic tube.
Background technology
At present, domestic power industry mainly use coal-fired mode to obtain electric power, and the flue gas of coal-fired boiler in power plant
UTILIZATION OF VESIDUAL HEAT IN is one of research and transformation focus of present stage.Too high with the presence of many power plant exhaust gas temperature at present
Problem, or need to reduce the inlet temperature of certain first device (such as cleaner unit, chimney etc.), it is therefore desirable to
Increasing heating surface in a certain section of flue and reduce flue-gas temperature, the commonly used economizer of boiler of power plant, air are pre-
Hot device is exactly typical fume afterheat Land use systems.In the repowering of present stage, often install additional in back-end ductwork
Heat medium water pipe heat exchanger, neat stress (MGGH) after being used for adding thermally desulfurizing, heat cold secondary wind (steam air heater),
The purposes such as heating feedwater (feed-water heater), become the focus of current boiler of power plant UTILIZATION OF VESIDUAL HEAT IN transformation.
The arrangement of heat medium water pipe heat exchanger typically uses straight tube or coil, and heat exchange element has light pipe, spiral shell
Rotation extended surface tube, H type extended surface tube etc., owing to the exchange capability of heat of light pipe is much smaller than extended surface tube, so fin tubular type is changed
Hot device uses more.But extended surface tube is also widely present the problems such as dust stratification fouling serious, easy, acid corrosion, is heated
Face needs frequent soot blowing to maintain operation, or there is the problems such as fume side pressure drop is excessive.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of fouling of heating surface less for power plant's pot
The flue gas waste heat utilization device of stove, solves the exchange capability of heat how strengthening flue gas waste heat recovery apparatus, the most again
The problem not increasing fouling of heating surface, fouling tendency.
In order to solve above-mentioned technical problem, the technical solution of the utility model there is provided a kind of heat exchange element for turning round
The enclosed steam air heater of bent elliptical tube, it is characterised in that include the hot end heat exchanger that is arranged in boiler hot flue and
The cool end heat exchanger being arranged in cold air duct, is connected by pipeline between cool end heat exchanger and hot end heat exchanger, institute
Heat exchanger tube on the hot end heat exchanger stated and cool end heat exchanger is twisted elliptic tube, and twisted elliptic tube is a kind of using
The serpentine pipe that the straight tube that sectional area is oval distorts vertically.
Preferably, between described cool end heat exchanger and hot end heat exchanger formed closed cycle, cool end heat exchanger and
Pipeline between hot end heat exchanger is provided with the heat medium water of heat medium water circulating pump, cool end heat exchanger and hot end heat exchanger
Outlet and entrance are equipped with temperature measuring equipment, and described heat medium water circulation delivery side of pump and entrance are equipped with pressure detecting
Device, the entrance of heat medium water circulating pump is provided with flow detector.
Preferably, the outlet of described hot end heat exchanger is provided with recirculation bypass, and recirculation bypass is provided with flow
Detection device and regulation valve.
Preferably, described twisted elliptic tube arrangement form in hot end heat exchanger and cool end heat exchanger is snakelike
Form of tubes or straight tube form.
Preferably, the both sides on twisted elliptic tube that described coil form is arranged are provided with suspension apparatus, distortion
On elliptical tube, the junction with suspension apparatus is pipe.
Preferably, the spacing of described twisted elliptic tube is equal to the long axis length of distorted elliptical tube section；Adjacent
Twisted elliptic tube major axis position is mutually supported by periodic contact point, corresponding formation gap, short axle position.
Preferably, the pipeline between described cool end heat exchanger and hot end heat exchanger is connected with water replanishing device.
Preferably, the porch of heat medium water circulating pump is located in the outlet of described water replanishing device.
This utility model uses a kind of coefficient of heat transfer more than light pipe, is less likely to occur again dust stratification, the changing of fouling simultaneously
Thermal element (i.e. twisted elliptic tube), strengthens the exchange capability of heat of flue gas waste heat recovery apparatus, and reduces heating surface
Dust stratification and fouling.
Accompanying drawing explanation
Fig. 1 be a kind of heat exchange element be the structural representation of the enclosed steam air heater of twisted elliptic tube；
Fig. 2-1 is the structural representation of the hot end heat exchanger (or cool end heat exchanger) of coil form；
Fig. 2-2 is the structural representation of the hot end heat exchanger (or cool end heat exchanger) of straight tube form.
Detailed description of the invention
For making this utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
This utility model be a kind of heat exchange element be the enclosed steam air heater of twisted elliptic tube, as it is shown in figure 1, its bag
Include the enclosed steam air heater being arranged in cold air duct and heating flue, be divided into the hot junction heat exchange being arranged in boiler hot flue
Device 1 and the cool end heat exchanger 3 being arranged in cold air duct, hot end heat exchanger 1 and cool end heat exchanger 3 pass through heating agent
Water forms closed cycle, and the heat medium water outlet of cool end heat exchanger 3 and hot end heat exchanger 1 and entrance are equipped with totally 4
Temperature measuring equipment 6.In the middle of cool end heat exchanger 3 and hot end heat exchanger 1, heat medium water circulating pump 2 is set, passes through heating agent
Water-circulating pump 2 provides circulating head, when the heat medium water in closed cycle is due to reason underfeds such as leakages,
Heat medium water can be supplemented by water replanishing device 5.The entrance of heat medium water circulating pump 2 is equipped with pressure-detecting device 8 and stream
Amount detecting device 7, heat medium water circulating pump 2 exports equipped with pressure-detecting device 8, is used for monitoring heat medium water circulation
Pump 2 exports the pressure with entrance the two key point and flow.Heat medium water at hot end heat exchanger 1 exports and arranges
Recirculation bypasses, equipped with flow detector 7 in bypass, and can when the regulation valve 4 opened in recirculation bypass
The monitoring recirculation water yield is also controlled by.
The heat exchanger tube of hot end heat exchanger 1 and cool end heat exchanger 3 uses a kind of sectional area to be oval straight tube edge
The serpentine pipe of axial twist, referred to as twisted elliptic tube 9.
Twisted elliptic tube 9 in hot end heat exchanger 1 and cool end heat exchanger 3 may be disposed to the Serpentis as shown in Fig. 2-1
Shape form of tubes, it is possible to be arranged to the straight tube form as shown in Fig. 2-2.As being arranged to coiled, then need
It is arranged to pipe at point of suspension 11, suspension apparatus can be set at pipe.The spacing of twisted elliptic tube 9 is equal to
The long axis length in twisted elliptic tube 9 cross section, periodic contact point is passed through at adjacent twisted elliptic tube 9 major axis position
10 mutually support, corresponding formation gap, short axle position.
Claims (8)
1. a heat exchange element is the enclosed steam air heater of twisted elliptic tube, it is characterised in that include being arranged in boiler hot
Hot end heat exchanger (1) in flue and the cool end heat exchanger (3) being arranged in cold air duct, cool end heat exchanger (3)
And connected by pipeline between hot end heat exchanger (1), described hot end heat exchanger (1) and cool end heat exchanger (3)
On heat exchanger tube be twisted elliptic tube (9), twisted elliptic tube (9) be a kind of sectional area be oval
The serpentine pipe that straight tube distorts vertically.
A kind of heat exchange element the most as claimed in claim 1 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
Closed cycle, cool end heat exchanger (3) is formed between described cool end heat exchanger (3) and hot end heat exchanger (1)
With the pipeline between hot end heat exchanger (1) is provided with heat medium water circulating pump (2), cool end heat exchanger (3) and heat
The heat medium water outlet of end heat exchanger (1) and entrance are equipped with temperature measuring equipment (6), described heat medium water circulating pump
(2) outlet and entrance are equipped with pressure-detecting device (8), and the entrance of heat medium water circulating pump (2) is provided with stream
Amount detecting device (7).
A kind of heat exchange element the most as claimed in claim 1 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
The outlet of described hot end heat exchanger (1) is provided with recirculation bypass, and recirculation bypass is provided with flow detection dress
Put (7) and regulation valve (4).
A kind of heat exchange element the most as claimed in claim 1 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
The described twisted elliptic tube (9) arrangement form in hot end heat exchanger (1) and cool end heat exchanger (3) is
Coil form or straight tube form.
A kind of heat exchange element the most as claimed in claim 4 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
The both sides on twisted elliptic tube (9) that described coil form is arranged are provided with suspension apparatus, twisted elliptic tube
(9) upper and suspension apparatus junction is pipe.
A kind of heat exchange element the most as claimed in claim 4 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
The spacing of described twisted elliptic tube (9) is equal to the long axis length in twisted elliptic tube (9) cross section；Adjacent torsion
Bent elliptical tube (9) major axis position is mutually supported by periodic contact point (10), the corresponding shape in short axle position
Become gap.
A kind of heat exchange element the most as claimed in claim 1 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
Pipeline between described cool end heat exchanger (3) and hot end heat exchanger (1) is connected with water replanishing device (5).
A kind of heat exchange element the most as claimed in claim 7 is the enclosed steam air heater of twisted elliptic tube, it is characterised in that
The porch of heat medium water circulating pump (2) is located in the outlet of described water replanishing device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620485576.6U CN205784781U (en) | 2016-05-25 | 2016-05-25 | A kind of heat exchange element is the enclosed steam air heater of twisted elliptic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620485576.6U CN205784781U (en) | 2016-05-25 | 2016-05-25 | A kind of heat exchange element is the enclosed steam air heater of twisted elliptic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205784781U true CN205784781U (en) | 2016-12-07 |
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ID=58113648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620485576.6U Active CN205784781U (en) | 2016-05-25 | 2016-05-25 | A kind of heat exchange element is the enclosed steam air heater of twisted elliptic tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205784781U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524791A (en) * | 2016-12-22 | 2017-03-22 | 中国科学院广州能源研究所 | Three-dimensional variable-space variable-structure flue gas reheater |
| CN106969370A (en) * | 2017-03-10 | 2017-07-21 | 中国科学院广州能源研究所 | A kind of three-dimensional emptying anaplasia fume waste-heat recoverer |
-
2016
- 2016-05-25 CN CN201620485576.6U patent/CN205784781U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524791A (en) * | 2016-12-22 | 2017-03-22 | 中国科学院广州能源研究所 | Three-dimensional variable-space variable-structure flue gas reheater |
| CN106969370A (en) * | 2017-03-10 | 2017-07-21 | 中国科学院广州能源研究所 | A kind of three-dimensional emptying anaplasia fume waste-heat recoverer |
| CN106969370B (en) * | 2017-03-10 | 2019-05-17 | 中国科学院广州能源研究所 | A kind of emptying structure changes flue gas waste heat recoverer of three-dimensional |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |