A method for controlling flow velocity vibration of a heat exchanger
A heat exchanger and flow rate technology, applied in vibration cleaning, cleaning heat transfer devices, lighting and heating equipment, etc., can solve problems such as long hysteresis period, and achieve the effects of enhanced descaling, increased vibration range, and optimization of structural parameters
Active Publication Date: 2022-06-24
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] However, in practice, it is found that if the vibration of the tube bundle is adjusted through fixed periodic changes or parameter sizes, there will be hysteresis and the period will be too long or too short.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] A shell and tube heat exchanger such as figure 1 As shown, the shell and tube heat exchanger includes a shell 20, a heat exchange part 23, a shell side inlet pipe 21 and a shell side outlet pipe 22; the heat exchange part 23 is arranged in the shell 20, and the heat exchange part It is fixedly connected to the front tube sheet 16 and the rear tube sheet 19; the shell side inlet pipe 24 and the shell side outlet pipe 25 are both arranged on the shell 20; the fluid enters from the shell side inlet pipe 24 and passes through the heat exchange components. For heat exchange, take over 25 from the shell side outlet.
[0029] Preferably, the heating member 23 extends in the horizontal direction. The heat exchanger is arranged horizontally.
[0030] figure 2 A top view of the heat exchange component 23 is shown, such as figure 2 As shown, the heat exchange component includes a central tube 8, a left tube 21, a right tube 22 and a tube group 1, the tube group 1 includes a ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a flow velocity vibration control method of a heat exchanger. A velocity detection element is arranged inside the free end of the tube bundle to detect the flow velocity of the fluid in the free end of the tube bundle. The velocity detection element is connected to the controller for data connection, and the controller according The speed data is extracted in time sequence, and the speed difference or the accumulation of the speed difference change is obtained by comparing the speed data of adjacent time periods. When it is lower than the threshold, the controller controls the electric heater to stop heating or continue heating, so as to maintain heat exchange Vibration of the component; if the velocity of the previous period is V1, the velocity of the adjacent subsequent period is V2, if V1 <v 2，则低于阈值时，控制器控制电加热器停止加热；如果v 1>V 2, when it is lower than the threshold, the controller controls the electric heater to heat. The present invention judges the steady state of the fluid according to the speed difference or the accumulation of speed difference changes, so that the result is more accurate, and the problem of error increase caused by aging caused by the running time problem will not be avoided.< / v>
Description
technical field [0001] The invention relates to a shell-and-tube heat exchanger, in particular to a shell-and-tube heat exchanger of intermittent vibration descaling. Background technique [0002] Shell and tube heat exchangers are widely used in chemical, petroleum, refrigeration, nuclear energy and power industries. Due to the global energy crisis, in order to reduce energy consumption, the demand for heat exchangers in industrial production is also increasing. The quality requirements for heat exchangers are also getting higher and higher. In recent decades, although compact heat exchangers (plate, plate-fin, pressure-welded plate heat exchangers, etc.), heat pipe heat exchangers, direct contact heat exchangers, etc. have been developed rapidly, due to the rapid development of shell-and-tube heat exchangers The heat exchanger has a high degree of reliability and wide adaptability, and it still occupies the dominant position in output and consumption. According to relevan...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F28G7/00F28G15/00
Inventor 张磊陈晓东田强陈文佼魏民王进张冠敏修蓬岳周乃香余显晟
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY