Sawtooth shuttle-shaped fan inner component heat exchanger device and heat exchange system

A technology of internal components and heat exchangers, applied in indirect heat exchangers, heat transfer modification, heat exchange equipment, etc., can solve the problems of poor heat transfer effect of heat exchangers, large pressure drop of heat exchangers, etc. Small pressure drop, small increase in pressure drop, and the effect of thinning thickness

Active Publication Date: 2020-02-18
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the present invention, the sawtooth shuttle-shaped internal member realizes automatic rotation under the action of the exhaust gas flow rate. This technology turns passive into active. On the basis of not increasing the thermal boundary layer, the thickness of the thermal boundary layer is effectively reduced, and the heat transfer performance is enhanced. The increase in the pressure drop of the heat exchanger is small, which can not only achieve the effect of actively enhancing heat transfer, but also save power costs, and solve the problem of poor heat transfer effect of the heat exchanger and large pressure drop of the heat exchanger in the prior art The problem

Method used

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  • Sawtooth shuttle-shaped fan inner component heat exchanger device and heat exchange system
  • Sawtooth shuttle-shaped fan inner component heat exchanger device and heat exchange system
  • Sawtooth shuttle-shaped fan inner component heat exchanger device and heat exchange system

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Experimental program
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Embodiment approach

[0049] see Figure 1(a) to Figure 3 As shown, the present invention provides a sawtooth shuttle-shaped fan inner member heat exchanger device, including: a pipe box 1 , a sawtooth shuttle fan inner member 8 , a fixed shaft 3 , a lower support plate 2 and an upper support plate 4 .

[0050] The bottom of the pipe box 1 is provided with a cold fluid inlet 9, and the top is provided with a cold fluid outlet 5 and a cold fluid outlet thermometer 15; inside the pipe box 1, a lower support plate 2 is installed near the cold fluid inlet 9, near the cold fluid outlet The upper support plate 4 is installed at 5 places; the lower support plate 2 and the upper support plate 4 are provided with some air vents. The fixed shafts 3 of several sawtooth shuttle-shaped fan inner components are installed between the lower support plate 2 and the upper support plate 4; bearings 7 are installed on the fixed shaft 3, and the outer ends of the bearings 7 are equipped with sawtooth shuttle-shaped fan...

Embodiment 1

[0072] The internal component of the three-blade sawtooth shuttle fan is I, the internal component of the five-blade sawtooth shuttle fan is II, and the inclination angle of the blade is α. After CFD fluid mechanics software simulation, the vorticity of the two blades at different inclination angles is as follows: Figure 5 As shown, it can be seen from the figure that when the inclination angle reaches 18°, the maximum vorticity of the five-bladed sawtooth shuttle fan is relatively moderate, and when the inclination angle is 15° or 21°, the vorticity is relatively large. Therefore, when the inclination angle is 18°, the internal components of the five-blade sawtooth shuttle fan can improve the flow loss of gas, reduce the noise of air flow disturbance and the vibration of the fan. Therefore, the internal structure of the sawtooth shuttle-shaped fan with five blades and an inclination angle of 18° is better, and the present invention adopts this structure as the internal struct...

Embodiment 2

[0074] The cooling fluid in the tube is air, which is transported by the fan, enters the rotameter to measure the flow rate, and then enters the inner tube of the heat exchange tube with a flow rate of 50m3 / h. A string of sawtooth shuttle-shaped fan inner member strings are installed in the tube. The pipe gap is filled with steam, and the steam is produced by a steam generator. The internal components of the designed sawtooth shuttle fan can automatically rotate at high speed in the tube under the drive of air. A comparative experiment was carried out on the above devices.

[0075] Group I is fixed and static 15 groups of five-bladed sawtooth shuttle fan internal components;

[0076] Group II is self-rotating 15 sets of five-blade sawtooth shuttle fan internal components;

[0077] Two sets of heat exchangers were used to collect experimental data, and the results of the two sets of experiments Figure 6(a) and 6(b) Shown:

[0078] Depend on Figure 6(a) and 6(b) It can...

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Abstract

The invention discloses a sawtooth shuttle-shaped fan inner component heat exchanger device. The device comprises a pipe box; a lower supporting plate is arranged at the position, close to a cold fluid inlet, of the interior of the pipe box, and an upper supporting plate is arranged at the position, close to a cold fluid outlet, of the interior of the pipe box; a plurality of exhaust holes are formed in the lower supporting plate and the upper supporting plate; a plurality of fixing shafts are arranged between the lower supporting plate and the upper supporting plate; a plurality of sawtooth shuttle-shaped fan inner components are arranged on the fixing shafts through bearings; the sawtooth shuttle-shaped fan inner components can rotate relative to the fixing shafts through the bearings; and the sawtooth shuttle-shaped fan inner components comprise a plurality of blades which are uniformly arranged in the circumferential direction, and each blade is arranged in a sawtooth shuttle shape. According to the device, the sawtooth shuttle-shaped fan inner components are close to the inner wall of the pipe box but not in contact with the inner wall, the area of a thermal boundary layer cannot be additionally increased, the self-rotating turbulent flow inner components can automatically rotate under driving of airflow without external power, the disturbance of fluid is increased, the thickness of the thermal boundary layer is effectively reduced, and the heat exchange efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of strengthening waste heat recovery of semi-coke tail gas, and in particular relates to a heat exchanger device and a heat exchange system for an internal component of a sawtooth shuttle fan. Background technique [0002] The semi-coke industry is a pillar characteristic industry of my country's energy and chemical industry, which has an important impact on the national economic and social development. In the process of coal conversion and utilization, low-temperature dry distillation of coal produces solid semi-coke, liquid coal tar and gaseous gas. The production technology of semi-coke and coal tar is relatively perfect, and the utilization of coal gas needs to be further improved. Hot coal gas contains a lot of waste heat, and its calorific value can reach 33.5-37.7MJ / m 3 At this stage, part of the tail gas is directly discharged, and part of it is recycled. To recycle and use liquid ammonia to cool d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D21/00F28F13/02F28F13/06
CPCF28D21/00F28D2021/0019F28F13/02F28F13/06
Inventor 任国瑜崔苗王金玺任旭白雪刘树繁钟源南岗岗
Owner YULIN UNIV
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