CN212300018U - Hot air internal circulation control system of blowing type air cooler - Google Patents
Hot air internal circulation control system of blowing type air cooler Download PDFInfo
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- CN212300018U CN212300018U CN202020819156.3U CN202020819156U CN212300018U CN 212300018 U CN212300018 U CN 212300018U CN 202020819156 U CN202020819156 U CN 202020819156U CN 212300018 U CN212300018 U CN 212300018U
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Abstract
The utility model discloses a blast-type air cooler hot air inner circulation control system, including setting up import shutter, export shutter, ambient temperature sensor and the fluid temperature sensor on blast-type air cooler to and set up constant speed fan and the frequency conversion fan in blast-type air cooler heat exchanger tube bank department be provided with electronic shutter of bypass and plenum temperature sensor on the blast-type air cooler, the export shutter is automatic control, the frequency conversion fan is reversible frequency conversion fan, realizes the hot-blast inner circulation of blast-type air cooler through the cooperation of the electronic shutter of frequency conversion fan, constant speed fan and bypass that can reverse. The utility model is suitable for a under the condition that does not increase the area of taking up an area at extremely cold area natural gas pressure gas station blast air cooler system, guarantee the accurate control of passing through blast air cooler back temperature at extremely cold area natural gas to guarantee system safety and satisfy the low reaches processing technology requirement, avoid the natural gas to be overcooled moreover, form and freeze stifled.
Description
Technical Field
The utility model belongs to the technical field of natural gas line carries, in particular to blast type air cooler heated air inner loop control system suitable for extremely cold area.
Background
In recent years, petroleum and natural gas exploitation and petrochemical industry are rapidly developed, cross-border pipelines and cross-regional pipelines are vigorously constructed, and natural gas pipelines and matched plant station projects thereof are increasingly constructed in extremely cold regions.
In a plant, natural gas is pressurized by a compressor, and the temperature is increased along with the pressurization, so that the system is economical and energy-saving to operate or meets the requirements of downstream treatment processes, and a blast air cooler is generally adopted to cool the pressurized natural gas to a certain temperature.
In winter in extremely cold areas, even if the fan of the blast air cooler stops running, a large amount of heat can still be taken away by pressurized natural gas only through natural convection of the heat exchange tube bundle of the air cooler, and the natural gas is excessively cooled after passing through the air cooler, so that the natural gas is condensed at the outlet end of the heat exchange tube bundle to form frozen plugs, or the temperature of the cooled natural gas is too low to meet the requirements of downstream treatment processes.
At present, a traditional air-blowing type air cooler hot air internal circulation control system in an extremely cold region mainly comprises an inlet shutter and an outlet shutter which are arranged on the air-blowing type air cooler, a variable frequency fan and a constant speed fan which are arranged below a heat exchange tube bundle of the air-blowing type air cooler, and an environment temperature sensor and a fluid temperature sensor which are arranged on the air-blowing type air cooler. When the environment temperature sensor detects that the environment temperature is lower than a set value, the inlet and the outlet shutters are closed, the constant speed fan stops rotating, the variable frequency fan is started, inlet cold air is guided to flow upwards through the heat exchange tube bundle to increase the air temperature, outlet hot air passing through the heat exchange tube bundle is blocked by the closed outlet shutters, hot air flows to the side of the constant speed fan stopping rotating, and flows downwards through the heat exchange tube bundle to form circulation and preserve heat of the tube bundle. The rotating speed of the variable frequency fan is adjusted through the fluid temperature sensor, so that the temperature of the cooled natural gas is controlled in a proper range, and the method has feasibility under the condition that the conveying temperature of the natural gas pipeline does not need to be controlled accurately.
For the traditional blowing type hot air internal circulation system, the control technology has the following defects:
(1) in the air chamber of the existing blast type air cooler hot air internal circulation control system, the quantity and the flowing direction of hot air required by internal circulation cannot be well controlled.
(2) The outlet shutter is directly closed, if the air volume of the variable frequency motor is too large, impact is formed on the outlet shutter, and the outlet shutter is easy to damage.
(3) The main reason for adopting the hot air internal circulation system is that the inlet air temperature of the cooled fluid outlet end heat exchange tube bundle is improved, so that the phenomenon that the outlet end of the heat exchange tube bundle is condensed to form frozen blockage or the cooled natural gas has too low temperature to meet the requirements of downstream processing technology is avoided. Therefore, how to accurately control the inlet air temperature at the outlet end is an important condition for the successful application of the hot air internal circulation system. The temperature in the air chamber is not monitored in the existing system, so that the temperature of the inlet air cannot be accurately controlled, and the purpose of setting a hot air internal circulation system cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the hot air internal circulation control system of the blast air cooler is provided to ensure the accurate control of the temperature of natural gas in extremely cold areas after the natural gas passes through the blast air cooler, ensure the safety of the system and meet the requirements of downstream processing technology.
The utility model adopts the technical proposal that: the utility model provides a blast type air cooler hot air inner loop control system, is including setting up import shutter, export shutter, ambient temperature sensor and the fluid temperature sensor on blast type air cooler to and set up constant speed fan and the frequency conversion fan of locating at blast type air cooler heat exchanger tube bank, its characterized in that: the air cooler is characterized in that a bypass electric shutter and an air chamber temperature sensor are arranged on the air cooler, the outlet shutter is automatically controlled, the variable frequency fan is a reversible variable frequency fan, and the hot air internal circulation of the air cooler is realized through the cooperation of the reversible variable frequency fan, the constant speed fan and the bypass electric shutter.
Forced air cooler hot air inner loop control system, its the exit end by cooling fluid is being kept away from in the setting of constant speed fan, the frequency conversion fan setting that can reverse is being close to by cooling fluid's exit end.
Hot-blast inner circulation control system of blast formula air cooler, its the export shutter has minimum aperture, promptly the export shutter remains the open mode of certain aperture throughout.
The system of the blast air cooler hot air internal circulation control system of the utility model is divided into a winter/summer control mode and is switched according to the set value of the environment temperature sensor;
in a summer mode, the inlet shutter and the outlet shutter are always in an open state, the bypass electric shutter is always in a closed state, the constant-speed fan and the reversible variable-frequency fan guide air to flow upwards, air does not circulate in the air chamber, and the rotating speed of the reversible variable-frequency fan and the starting and stopping of the constant-speed fan are controlled by the fluid temperature sensor;
in a winter mode, the constant-speed fan guides air to flow to one side of the blast type air cooler heat exchange tube bundle, the bypass electric shutter is opened, the reversible variable-frequency fan reverses and guides air to flow to the other side of the blast type air cooler heat exchange tube bundle, hot air internal circulation is formed in the air chamber, and the reversing speed of the reversible variable-frequency fan and the opening degree of the outlet shutter and the bypass electric shutter are controlled through the fluid temperature sensor and the air chamber temperature sensor.
The hot-blast inner circulation control system of blast air cooler, its fluid temperature sensor passes through the comparison of temperature set value and measured value, right the frequency conversion fan that can reverse is controlled with the export shutter.
Hot-blast inner circulation control system of blast formula air cooler, its plenum temperature sensor passes through the comparison of temperature setting value and measured value, right bypass electric louver and export shutter control.
Blast formula air cooler hot air inner circulation control system, it is when winter mode, works as the speed of reversible frequency conversion fan reversal reachs maximum rotational speed, the electronic shutter of bypass is opened entirely, and exports the aperture of shutter and adjust to minimum aperture after, the air cooler still can't satisfy and maintain the fluid temperature, the import shutter is closed.
Hot-blast inner circulation control system of blast formula air cooler, its export shutter has minimum 10% aperture.
Forced air cooler hot air inner loop control system, its be provided with two fluid temperature sensor on the forced air cooler, one of them fluid temperature sensor is used for the air cooler control, another fluid temperature sensor is used for comparing.
Forced air cooler hot-blast inner circulation control system, its be provided with two plenum temperature sensor on the forced air cooler, two plenum temperature sensor's measurement average is used for air cooler overall control.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses being deep into the extremely cold district natural gas of analysis and being overcooled through the air cooler, under the unable more accurate control's of export temperature condition, introduce air cooler winter/summer control mode conversion, but set up the frequency conversion fan of reversal, electronic export shutter, bypass electric shutter and plenum temperature sensor, the improvement gets into the air cooler and is close to the air temperature by before the cooling fluid exit end heat exchanger tube bank, control circulation hot-air quantity and the volume of control air cooler exhaust hot-air, in order to realize extremely cold district winter under the environment, comparatively accurate control (control accuracy is 3 ℃) the temperature behind the blast air cooler of natural gas.
The utility model is suitable for a under the condition that does not increase the area of taking up an area at extremely cold area natural gas pressure gas station blast air cooler system, guarantee the accurate control of temperature behind the extremely cold area natural gas through blast air cooler to guarantee system safety and satisfy the low reaches processing technology requirement, avoid the natural gas to be excessively cooled moreover, form and freeze stifled, reduced the investment and a large amount of manpowers, material resources of attached facility, reached economy, safety, environmental protection, energy-conserving effect.
Drawings
The invention will be described by way of specific examples with reference to the accompanying drawings, in which
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figure are: the device comprises an inlet shutter 1, an outlet shutter 2, an environment temperature sensor 3, a fluid temperature sensor 4, a blast type air cooler heat exchange tube bundle 5, a constant speed fan 6, a variable frequency fan 7, a bypass electric shutter 8 and an air chamber temperature sensor 9.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, a blast-type air cooler internal hot air circulation control system comprises an inlet shutter 1, an outlet shutter 2, an ambient temperature sensor 3 and a fluid temperature sensor 4 which are arranged on a blast-type air cooler, and a constant speed fan 6 and a variable frequency fan 7 which are arranged at a heat exchange tube bundle 5 of the blast-type air cooler, specifically, the constant speed fan 6 is arranged at an outlet end far away from a cooled fluid, the reversible variable frequency fan 7 is arranged at an outlet end close to the cooled fluid, the inlet shutter is manually controlled, a bypass electric shutter 8 and an air chamber temperature sensor 9 are arranged on the blast-type air cooler, the outlet shutter 2 is automatically controlled and has an opening degree of at least 10%, that is, the outlet shutter 2 is always kept in an open state with a certain opening degree, so as to avoid impact damage to the outlet shutter under the full rotation speed of the constant speed fan, the variable frequency fan 7 is a reversible variable frequency fan, and the hot air internal circulation of the blast air cooler is realized through the cooperation of the reversible variable frequency fan 7, the constant speed fan 6 and the bypass electric shutter 8.
Specifically, the utility model discloses to export hot-air through production of blast formula air cooler heat exchanger tube bank top, through the electronic shutter of bypass and the reversal of reversible frequency conversion fan, guide export hot-air is followed earlier from keeping away from by the cooling fluid exit end to being close to by the cooling fluid exit end flow, then downward flow again. The outlet hot air flowing to the outlet end of the cooled fluid becomes inlet air of the outlet tube bundle of the cooled fluid; the hot air flowing downwards is mixed with the cold air in the inlet environment below the blowing air cooler, so that the air temperature of the blowing air cooler is increased before the cooled fluid outlet end passes through the heat exchange tube bundle, and the hot air internal circulation of the blowing air cooler is realized. Avoid when ambient temperature is low excessively, even close the fan, still being taken away too much heat by cooling fluid through heat exchanger tube bundle, cause to be excessively cooled by cooling fluid, take place at the exit end that heat exchanger tube bundle condenses to form and freezes stifled, or lead to the natural gas temperature after the cooling to hang down and can't satisfy the low reaches processing technology demand.
The utility model discloses an improve the volume that gets into air cooler heat exchanger tube air temperature, control circulation hot-air volume and control air cooler discharge hot-air before restrainting, even in extremely cold area, also can realize the temperature behind the comparatively accurate control natural gas through blast type air cooler to the realization is normally worked under extremely cold area winter mode, avoids the natural gas to be overcooled, forms to freeze stifled.
In the embodiment, the system is divided into a winter/summer control mode, switching is carried out according to the set value of the environment temperature sensor 3, a safety margin of about 10 ℃ exists between the set value of the mode switching temperature in winter and summer and the set value of the circulating temperature set by the air chamber, all the set values of the temperature can be adjusted according to actual conditions, so that a set of blast type air coolers can realize stable operation in winter/summer in extremely cold areas, and the control process is fully automatic.
In the summer mode, namely the measured value of the ambient temperature sensor 3 is higher than a set value, the inlet shutter 1 and the outlet shutter 2 are always in an open state, the bypass electric shutter 8 is always in a closed state, the constant speed fan 6 and the reversible variable frequency fan 7 guide air to flow upwards, no air circulates in an air chamber, and the rotating speed of the reversible variable frequency fan 7 and the starting and stopping of the constant speed fan 6 are controlled by the fluid temperature sensor 4.
Specifically, the control of the air cooler takes a fluid temperature sensor as a control condition.
When the measured value of the fluid temperature sensor is lower than a summer set value, firstly, adjusting the rotating speed of the reversible variable frequency fan, specifically, reducing the rotating speed of the reversible variable frequency fan, and keeping the constant speed fan running; and when the rotating speed of the reversible variable-frequency fan reaches the lowest rotating speed, stopping the constant-speed fan. And then, readjusting the rotating speed of the reversible variable frequency fan to the highest rotating speed, and reducing the rotating speed of the reversible variable frequency fan on the basis of stopping the operation of the constant speed fan if the measured value of the fluid temperature sensor is still lower than the set value in summer. And finally, when the rotating speed of the reversible variable-frequency fan reaches the lowest rotating speed, the measured value of the fluid temperature sensor is still lower than the set value in summer, and the reversible variable-frequency fan is stopped, namely the constant-speed fan and the reversible variable-frequency fan both stop running at the moment.
In a winter mode, namely the measured value of the ambient temperature sensor 8 is lower than a set value, the constant speed fan 6 guides air to flow to one side of the blast air cooler heat exchange tube bundle 5, the bypass electric shutter 8 is opened, the reversible variable frequency fan 7 reverses and guides air to flow to the other side of the blast air cooler heat exchange tube bundle 5, hot air internal circulation is formed in the air chamber, and the reversing speed of the reversible variable frequency fan 7 and the opening degrees of the outlet shutter 2 and the bypass electric shutter 8 are controlled through the fluid temperature sensor 4 and the air chamber temperature sensor 9.
Specifically, the control of the air cooler takes a fluid temperature sensor as a main control condition, and an air chamber temperature sensor as an auxiliary control condition.
When the measured value of the ambient temperature sensor is lower than the set value, the control mode is immediately switched to the winter mode no matter what the rotating speed of the reversible variable-frequency fan is and what the state of the constant-speed fan is. After the system is converted into a winter mode, the constant-speed fan is started, and the reversible variable-frequency fan runs in a reverse mode.
In order to maintain the fluid temperature, the speed of the reversible variable frequency fan reversing and the opening of the outlet shutter are controlled by a fluid temperature sensor. Specifically, when the measured value of the fluid temperature sensor is lower than the winter set value, the reverse rotation speed of the reversible variable frequency fan is firstly adjusted, when the reverse rotation speed of the reversible variable frequency fan is adjusted to the maximum rotation speed, the measured value of the fluid temperature sensor is still lower than the winter set value, and then the opening degree of the outlet shutter is adjusted.
In order to maintain the temperature of the air chamber, the opening degree of the bypass electric shutter and the outlet shutter is controlled by the air chamber temperature sensor. Specifically, the opening of the bypass electric shutter is first adjusted when the plenum temperature sensor measurement is below the cycle temperature set point, and the opening of the exit shutter is adjusted when the plenum temperature sensor measurement is still below the cycle temperature set point when the bypass electric shutter has been fully opened.
The opening of the outlet shutter is controlled by not only the air chamber temperature sensor but also the fluid temperature sensor. When the outlet shutter receives the control signals of the air chamber temperature sensor and the fluid temperature sensor at the same time, the control signals of the two temperature sensors are compared, and the outlet shutter selects and executes an instruction of more opening degrees required to be closed in the two control signals of the air chamber temperature sensor and the fluid temperature sensor.
In addition, in the winter mode, when the speed of the reversible variable frequency fan 7 is reversed to reach the maximum rotation speed, the bypass electric louver 8 is fully opened, and after the opening degree of the outlet louver 2 is adjusted to the minimum opening degree, the air cooler still cannot meet the requirement of maintaining the fluid temperature, and the inlet louver 1 is closed. At this point, the measurement from the ambient temperature sensor is recorded and the inlet shutter is opened again when the measurement from the ambient temperature sensor is higher than the aforementioned measurement.
In order to avoid damage or measurement errors of the fluid temperature sensors and influence on the overall control of the air cooler, the air cooler is provided with two fluid temperature sensors 4, one of the two fluid temperature sensors 4 is used for controlling the air cooler, the other fluid temperature sensor 4 is used for comparing, and when the measured values of the two fluid temperature sensors are different by more than 5 ℃, an alarm is given to remind an operator to troubleshoot faults.
In order to avoid the influence on the overall control of the air cooler caused by the measurement error of the fluid air chamber sensor due to the uneven air mixing of the air chamber, two air chamber temperature sensors 9 are arranged on the blowing air cooler, and the measurement average value of the two air chamber temperature sensors 9 is used for the overall control of the air cooler.
The utility model discloses a carry out the redundancy setting to two temperature sensor of plenum temperature sensor, fluid temperature sensor to improve control system's reliability and accuracy nature.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a blast-type air cooler hot air inner loop control system, is including setting up import shutter (1), export shutter (2), ambient temperature sensor (3) and fluid temperature sensor (4) on blast-type air cooler to and set up constant speed fan (6) and variable frequency fan (7) of blast-type air cooler heat exchanger tube bank (5) department, its characterized in that: the air cooler is characterized in that a bypass electric shutter (8) and an air chamber temperature sensor (9) are arranged on the blowing type air cooler, the outlet shutter (2) is automatically controlled, the frequency conversion fan (7) is a reversible frequency conversion fan, and hot air internal circulation of the blowing type air cooler is realized through cooperation of the reversible frequency conversion fan (7), the constant speed fan (6) and the bypass electric shutter (8).
2. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: the constant speed fan (6) is arranged at the outlet end far away from the cooled fluid, and the reversible variable frequency fan (7) is arranged at the outlet end near the cooled fluid.
3. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: the outlet louver (2) has the lowest opening degree, namely the outlet louver (2) is always kept in an opening state with a certain opening degree.
4. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: the system is divided into a winter/summer control mode and is switched according to a set value of the environment temperature sensor (3);
in a summer mode, the inlet shutter (1) and the outlet shutter (2) are always in an open state, the bypass electric shutter (8) is always in a closed state, the constant speed fan (6) and the reversible variable frequency fan (7) guide air to flow upwards, no air circulates in an air chamber, and the rotating speed of the reversible variable frequency fan (7) and the starting and stopping of the constant speed fan (6) are controlled by the fluid temperature sensor (4);
in a winter mode, the constant-speed fan (6) guides air to flow to one side of the blast type air cooler heat exchange tube bundle (5), the bypass electric louver (8) is opened, the reversible variable-frequency fan (7) reverses and guides air to flow to the other side of the blast type air cooler heat exchange tube bundle (5), hot air internal circulation is formed in the air chamber, and the reversing speed of the reversible variable-frequency fan (7) and the opening degrees of the outlet louver (2) and the bypass electric louver (8) are controlled through the fluid temperature sensor (4) and the air chamber temperature sensor (9).
5. The internal circulation control system of a blower air cooler as claimed in claim 4, wherein: the fluid temperature sensor (4) controls the reversible variable frequency fan (7) and the outlet shutter (2) by comparing a temperature set value with a measured value.
6. The internal circulation control system of a blower air cooler as claimed in claim 4, wherein: the air chamber temperature sensor (9) controls the bypass electric shutter (8) and the outlet shutter (2) by comparing a temperature set value with a measured value.
7. The internal circulation control system of a blower air cooler as claimed in claim 4, wherein: in the winter mode, when the speed of the reversible variable frequency fan (7) in the reverse rotation reaches the maximum rotating speed, the bypass electric shutter (8) is fully opened, and after the opening degree of the outlet shutter (2) is adjusted to the minimum opening degree, the air cooler still cannot meet the requirement of maintaining the fluid temperature, and the inlet shutter (1) is closed.
8. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: the outlet shutter (2) has a minimum opening of 10%.
9. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: the air cooler is provided with two fluid temperature sensors (4), wherein one fluid temperature sensor (4) is used for controlling the air cooler, and the other fluid temperature sensor (4) is used for comparing.
10. The internal circulation control system of blast air cooler hot air according to claim 1, wherein: two air chamber temperature sensors (9) are arranged on the blast air cooler, and the average value of the two air chamber temperature sensors (9) is used for the integral control of the air cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819156.3U CN212300018U (en) | 2020-05-15 | 2020-05-15 | Hot air internal circulation control system of blowing type air cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819156.3U CN212300018U (en) | 2020-05-15 | 2020-05-15 | Hot air internal circulation control system of blowing type air cooler |
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| CN212300018U true CN212300018U (en) | 2021-01-05 |
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| CN202020819156.3U Active CN212300018U (en) | 2020-05-15 | 2020-05-15 | Hot air internal circulation control system of blowing type air cooler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984661A (en) * | 2021-03-30 | 2021-06-18 | 中国石油集团东北炼化工程有限公司沈阳分公司 | Air cooler capable of resisting severe summer heat and severe cold weather |
| CN113958867A (en) * | 2021-10-19 | 2022-01-21 | 中控智网(北京)能源技术有限公司 | Control method, system, equipment and storage medium for natural gas pipeline |
| WO2024119455A1 (en) * | 2022-12-08 | 2024-06-13 | 杰瑞石油天然气工程有限公司 | Control method for air cooling apparatus, air cooling apparatus and compressor unit |
-
2020
- 2020-05-15 CN CN202020819156.3U patent/CN212300018U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984661A (en) * | 2021-03-30 | 2021-06-18 | 中国石油集团东北炼化工程有限公司沈阳分公司 | Air cooler capable of resisting severe summer heat and severe cold weather |
| CN113958867A (en) * | 2021-10-19 | 2022-01-21 | 中控智网(北京)能源技术有限公司 | Control method, system, equipment and storage medium for natural gas pipeline |
| CN113958867B (en) * | 2021-10-19 | 2024-01-23 | 中控创新(北京)能源技术有限公司 | Control method, system, equipment and storage medium for natural gas pipeline |
| WO2024119455A1 (en) * | 2022-12-08 | 2024-06-13 | 杰瑞石油天然气工程有限公司 | Control method for air cooling apparatus, air cooling apparatus and compressor unit |
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Effective date of registration: 20210209 Address after: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee before: SOUTHWEST BRANCH OF CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. |