CN105043160B - Cooling tower condensation module air inlet control device - Google Patents
Cooling tower condensation module air inlet control device Download PDFInfo
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- CN105043160B CN105043160B CN201510446769.0A CN201510446769A CN105043160B CN 105043160 B CN105043160 B CN 105043160B CN 201510446769 A CN201510446769 A CN 201510446769A CN 105043160 B CN105043160 B CN 105043160B
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- 238000001816 cooling Methods 0.000 title claims abstract description 64
- 238000009833 condensation Methods 0.000 title claims abstract description 15
- 230000005494 condensation Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000013519 translation Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000009347 mechanical transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model discloses an air inlet control device of a cooling tower condensation module, which comprises pressure sensors (103, 104 and 108), wind pressure sensors (101 and 102), a shutter type air inlet device (105), a PLC (programmable logic controller) 106, a push-pull rod electric device (107), a cooling tower fan (109) and a condensation module (110). The wind pressure sensor measures the pressures P1 and P2 at two sides of the shutter blade, the pressure sensor measures the pressure P3 of the hot and humid air outlet and the pressure P4 of the dry and cold air outlet, the pressure and wind pressure signals are input into the PLC controller to judge the adjustment direction of the cold air quantity, the relation between P1 and P2 controls the power supply loop of the electric device, the motor is controlled to turn and start and stop, the mechanical transmission device controls the movement of the push-pull rod, and the blade direction is adjusted to the optimal air inlet state. And a pressure sensor is arranged above the mixing section of the condensing module, the pressure P5 of the mixing section is transmitted to the PLC, and the output signal controls the fan to operate. The utility model realizes the automatic control of the air inlet quantity of the condensing module of the cooling tower and the fan of the cooling tower.
Description
Technical Field
The utility model relates to an automatic air inlet control device of a cooling tower, in particular to a shutter type air inlet control device of a condensing module of the cooling tower, which is suitable for a device for adjusting air inlet quantity.
Background
The countercurrent wet cooling tower has water loss caused by heat transfer and mass transfer between circulating cooling water and air inside the tower, and the water loss mainly includes three parts, including evaporation loss, wind blowing loss and pollution eliminating loss, and the evaporation loss is about 1.2-1.6% of the total circulating water and accounts for 30-55% of the total power plant water consumption. In order to recover the evaporated cooling water in the cooling tower, a cooling module is designed in the prior art, and the cooling module is arranged above the filler in the cooling tower to condense and recover the water vapor in the wet and hot vapor.
The cold air of the condensing module originates from natural ventilation, but the ventilation is in the process of variation due to the variation of the ambient wind speed and direction. When the ambient wind speed is high, the cold air quantity is too high, and the cold air pressure at the cold end outlet and the hot end outlet of the condensing module is too high, so that the rising of the hot and humid air is influenced, and the cooling effect of the cooling tower is further influenced; meanwhile, as the cold air quantity is too large, the negative pressure in the cooling tower is increased, the flow is increased, and the energy consumption of the cooling tower fan is increased.
The existing automatic air inlet control device of the cooling tower generally adopts a measurement transmission device, the control module carries out logic judgment to control the action of the electric device, and an automatic control process is realized, for example, the automatic control device of the waste heat power generation cooling tower of the utility model patent CN 203432450U, the combined cooling equipment of the utility model patent CN 101650056B and the water chilling unit and the control method thereof adopt a sensing device to receive signals, and the control module processes the signals to realize the control process.
Disclosure of Invention
The utility model aims to solve the problem of adjusting the air inlet of a condensing module of a cooling tower, and provides an automatic air inlet control device for the air inlet of the cooling module, which is used for adjusting the cold air quantity of the cooling module under different environmental wind speeds and wind directions and avoiding the influence of the condensing module on the cooling effect of the original cooling equipment.
The utility model adopts the following technical scheme:
an air inlet control device of a condensing module of a cooling tower, comprising: pressure sensor, shutter type air inlet device, wind pressure sensor, PLC controller and push-pull rod electric actuator. The pressure sensor is used for measuring the cold end outlet pressure and the hot end outlet pressure of the cooling tower condensation module, the pressure difference signal is used as a basis for judging whether the air inlet quantity is reasonable or not, the pressure sensor is used for measuring the pressure in the tower above the mixing section of the cooling tower condensation module, and the pressure signal is used as a basis for adjusting the running frequency of the cooling tower fan; the shutter type air inlet device is used for adjusting the blade direction to realize the adjustment of the air inlet quantity, and controlling the air inlet quantity to be in the optimal working range when the ambient wind direction and the wind speed change; the wind pressure sensor is used for measuring wind pressure at two sides of the blade, and the wind pressure differential signal is used as a basis for judging the adjustment direction and the amplitude of the blade; the PLC is used for logically judging an input signal and controlling the steering, the start and the stop of the electric device and the operation of the cooling tower fan; the push-pull rod electric device is used for receiving signals of the controller and controlling the motor to turn to further control the opening degree and the direction of the blades of the shutter type air inlet device.
Preferably, the shutter type air inlet device controls the air inlet quantity by the opening degree of the shutter blades.
Preferably, the shutter type air inlet device uses pressure signals of the two side pressure sensors as feedback signals of the current air inlet quantity.
Preferably, the blades of the shutter type air inlet device are connected by a push-pull cross bar, and the opening degree of a group of blades is controlled.
Preferably, the push-pull rod electric device is a control circuit for controlling the start and stop of the motor and steering by an output signal of the PLC, a rotating shaft of the motor is vertically meshed with a cross rod of the shutter air inlet device, and the steering control is used for controlling the translation direction of the push-pull rod.
Optionally, a flow meter can be adopted by the pressure sensor in the tower above the mixing section of the condensing module, and the flow signal is used as a feedback signal to adjust the operation of the cooling tower fan;
preferably, the air inlet control device adopts two sets of identical and independent devices which are respectively arranged at two sides of the cooling tower and respectively control the air inlet of the condensing modules at two sides.
The beneficial effects of the utility model are as follows:
1. due to the adoption of the shutter type air inlet device, the shutter is applied to the air quantity adjusting device, and the opening degree of the shutter blades can be adjusted according to the operation requirement to flexibly control the air quantity;
2. because the wind pressure sensors are adopted at the two sides of the shutter blade, the judgment of the current wind inlet quantity can be realized according to the wind pressure signals at the two sides, and the wind pressure signals are used as feedback signals of the wind quantity, so that a basis for determining and adjusting the opening degree is provided;
3. because the cold end outlet and the hot end outlet of the cooling tower condensation module are respectively provided with the pressure sensors, the values of the cold end outlet pressure and the hot end outlet pressure can be detected, and whether the cold air quantity is reasonable or not can be judged according to the relation between the cold end outlet pressure and the hot end outlet pressure;
4. because the PLC is adopted, the wind pressure signal and the pressure signal can be logically judged and processed, and the action of the push-pull rod electric device is controlled, so that the whole-course automation of the control process is realized;
5. because the upper part of the condensing module in the cooling tower is provided with the pressure measuring device, and the running frequency of the fan of the cooling tower is adjusted according to the pressure signal, the situation that the fan is small in large band can be avoided, and the energy consumption of the fan is reduced.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic illustration of an apparatus according to one embodiment of the utility model;
FIG. 2 is a schematic diagram of an air intake control device according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a louvered air intake apparatus in accordance with an embodiment of the present utility model;
FIG. 4 is a schematic diagram illustrating operation of a push-pull rod motor in accordance with one embodiment of the present utility model;
fig. 5 is a schematic diagram of motor control of a push-pull rod motor in accordance with one embodiment of the present utility model.
Reference numerals:
101 a wind pressure sensor; 102 wind pressure sensor 103 hot end outlet pressure sensor
104 cold end outlet pressure sensor 105 shutter type air inlet device
106PLC controller 107 push-pull rod electric device
108 pressure sensor 109 cooling tower fan
110 condensation module 401 shutter connecting rod
402 motor shaft
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the cooling tower condensation module air intake control device according to one embodiment of the present utility model includes a wind pressure sensor (101, 102), a hot end outlet pressure sensor (103), a cold end outlet pressure sensor (104), a shutter type air intake device (105), a PLC (programmable control device) controller (106), a push-pull rod electric device (107), a pressure sensor (108) above a mixing section in a cooling tower, and a cooling tower fan (109). The working process of the air inlet control device comprises the following steps: a shutter type air inlet device (105) is adopted, and the air inlet quantity is adjusted by adjusting the opening degree of a shutter; a cold end outlet and a hot end outlet of the cooling tower condensation module are respectively provided with a first pressure sensor (103) and a second pressure sensor (104), and the two sides of the blade of the shutter are respectively provided with a first wind pressure sensor and a second wind pressure sensor (101, 102); transmitting pressure signals of the pressure sensors (103, 104) and wind pressure signals of the wind pressure sensors (101, 102) to a PLC (106); the PLC (106) controls the action of the push-pull rod electric device (107) to adjust the shutter opening to the optimal air inlet quantity. Meanwhile, a third pressure sensor (108) measures the pressure above the mixing section in the cooling tower and transmits the pressure to a PLC (106) to control the operation of a cooling tower fan (109).
Fig. 2 is a schematic diagram of the air intake control device of the condensing module of the cooling tower. When the ambient wind direction is inconsistent with the direction of the shutter blades, the pressure difference of the two sides of the blades is unequal, namely the wind pressure of the windward side is larger than the wind pressure of the leeward side, and P1 and P2 respectively represent the wind pressure of the left side and the wind pressure of the right side of the blades (see figure 3); when the condensing module works, if the cold air quantity is too small, the hot end outlet pressure P3 is larger than the cold end outlet pressure P4, the condensing effect of the condensing module is affected, and if the cold air quantity is too large, the hot end outlet pressure P3 is smaller than the cold end outlet pressure P4, the rising of damp and hot air is restrained, and the normal cooling heat exchange of the cooling tower is affected. When P3> P4, i.e., Δp2>0 (Δp2=p3-P4), the shutter opening is increased, and the wind pressure differential value at both sides of the vane is adjusted in the decreasing direction: (assuming that the motor drives the push-pull rod to move right when rotating forward), when P1> P2 and DeltaP 1>0, the push-pull rod needs to move right, assuming that the motor rotates forward, when P1< P2 and DeltaP1 <0 (DeltaP1=P1-P2), the push-pull rod needs to move left, the motor rotates reversely, and when DeltaP1=0, the maximum ventilation rate is reached, and the motor stops rotating; when P3< P4, namely DeltaP 2<0, the shutter opening is required to be reduced, and the wind pressure differential value at two sides of the blade is required to be adjusted to the increasing direction: when P1 is more than P2 and DeltaP 1 is more than 0, the push-pull rod needs to move left, the motor rotates reversely, and when P1 is less than P2 and DeltaP 1 is less than 0, the push-pull rod needs to move right, and the motor rotates positively; when p3=p4, i.e. Δp2=0, the optimum air intake is reached without adjusting the shutter opening. For overview, when Δp1×Δp2>0, the motor is rotating forward; when Δp1×Δp2<0, the motor is reversed; when Δp1×Δp2<0, the motor stalls.
The wind pressure signals P1 and P2 and the pressure signals P3 and P4 are processed and controlled by a PLC controller to steer the motor, and the rotating shaft of the motor is linked with the push-pull rod to translate, so that the opening of the shutter is adjusted. Meanwhile, the pressure sensor (108) transmits the pressure P5 to the PLC for processing, and the fan is controlled to operate.
Fig. 3 is a schematic view illustrating an arrangement of a louver air inlet device according to an embodiment of the present utility model, wherein a plurality of pairs of wind pressure sensors respectively disposed at both sides of a plurality of blades are used in an actually operated air inlet control device to reduce sensing errors.
FIG. 4 is a schematic diagram of a motor shaft and push-pull rod linkage according to one embodiment of the present utility model. Wherein, the translation direction and the translation distance of the transverse push-pull rod (401) are controlled by the steering and the rotation angle of the motor control gear (402), and the control of the opening degree of the shutter blades is further realized.
Fig. 5 is a schematic diagram of an operation control circuit of the motor according to an embodiment of the present utility model, in which steering and/or start-stop control of the motor is achieved by opening/closing of switches k1, k2, k3, k4 controlled by a PLC controller (fig. 1). The specific control process is as follows: the switches k1, k3 are closed, the switches k2, k4 are opened, and the motor rotates in the forward direction; the switches k1, k3 are opened, the switches k2, k4 are closed, and the motor rotates reversely; the switches k1, k3, k2, k4 are all open, and the motor stops rotating.
It is to be understood that the above embodiments are merely for illustrating the technical solution of the present utility model and that other modifications and equivalents thereof, such as changes and equivalents of the elements of the present utility model, may be modified according to the teachings of the present utility model to suit particular situations or materials, and are intended to be encompassed by the scope of the claims of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (10)
1. An air inlet control device of a condensing module of a cooling tower is characterized by comprising:
the first pressure sensor (103) and the second pressure sensor (104) are respectively arranged at the cold end outlet and the hot end outlet of the cooling tower condensation module and are respectively used for measuring the cold end outlet pressure and the hot end outlet pressure of the cooling tower condensation module, and the pressure difference signal is used as a basis for judging whether the air inlet quantity is reasonable or not;
the shutter type air inlet device (105) is used for adjusting the air inlet quantity by adjusting the direction of the blades of the shutter type air inlet device, and controlling the air inlet quantity to be in the optimal working range when the ambient wind direction and the wind speed change;
the first wind pressure sensor (101) and the second wind pressure sensor (102) are respectively arranged at two sides of a blade of the shutter type air inlet device (105) and are respectively used for measuring wind pressure at two sides of the blade, and a pressure difference signal of the wind pressure is used as a basis for judging the adjustment direction and the adjustment amplitude of the blade;
the PLC (106) is used for logically judging pressure signals of the first and second pressure sensors (103, 104) and wind pressure signals of the first and second wind pressure sensors (101, 102) and sending control instructions to control the starting, stopping and steering of the electric device;
the push-pull rod electric device comprises a motor and is used for controlling the steering of the motor according to the control instruction so as to control the opening degree and the direction of the blade.
2. The cooling tower condensing module air intake control device according to claim 1, characterized by further comprising:
and a third pressure sensor (108) for measuring the pressure above the mixing section in the cooling tower and transmitting the measurement result to the PLC controller (106) to control the operating frequency of the cooling tower fan (109).
3. The cooling tower condensing module air intake control device of claim 1, wherein:
the push-pull rod electric device comprises a transverse push-pull rod (401),
a group of blades of the shutter type air inlet device are connected with a transverse push-pull rod (401), and the opening degree of the group of blades is controlled simultaneously through the left-right translation of the transverse push-pull rod.
4. The cooling tower condensing module air intake control device of claim 1, wherein:
the output signal of the PLC controls the start, stop and steering of the motor,
the rotating shaft of the motor is vertically meshed with a transverse push-pull rod (401) of the shutter air inlet device, and the translation direction of the push-pull rod is controlled by the steering of the motor.
5. The cooling tower condensing module air intake control device according to claim 1, characterized by further comprising:
and the flowmeter is used for measuring the flow above the mixing section in the cooling tower and transmitting the flow measurement result to the PLC (106) so as to control the operating frequency of the cooling tower fan (109).
6. The cooling tower condensing module air intake control device of any one of claims 1-5, wherein:
the wind pressure sensor comprises a plurality of pairs of wind pressure sensors which are respectively arranged at two sides of the plurality of blades.
7. The cooling tower condensing module intake control device of any one of claims 1-5, further comprising:
a control circuit comprising switches k1, k2, k3, k4,
the control instructions of the PLC control the opening/closing of the switches k1, k2, k3 and k4, so that the steering and/or start-stop control of the motor is realized.
8. The cooling tower condensing module air intake control device according to claim 7, wherein the specific control process of the control circuit comprises:
the switches k1, k3 are closed, the switches k2, k4 are opened, and the motor rotates in the forward direction;
the switches k1, k3 are opened, the switches k2, k4 are closed, and the motor rotates reversely;
the switches k1, k3, k2, k4 are all open, and the motor stops rotating.
9. The cooling tower condensation module air intake control device according to claim 4, further comprising a linkage device of a rotating shaft of the motor and the transverse push-pull rod (401), wherein the linkage device comprises a gear (402), the gear (402) is vertically meshed with the transverse push-pull rod (401), and the transverse push-pull rod (401) is driven to translate to the right side or the left side by rotating in the forward/direction of the gear (402).
10. A cooling tower, comprising:
two independent cooling tower condensation module air inlet control devices according to one of claims 1-9, which are arranged on both sides of the cooling tower respectively, for controlling the air inlet of the condensation modules on both sides of the cooling tower respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510446769.0A CN105043160B (en) | 2015-07-27 | 2015-07-27 | Cooling tower condensation module air inlet control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510446769.0A CN105043160B (en) | 2015-07-27 | 2015-07-27 | Cooling tower condensation module air inlet control device |
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| CN105043160A CN105043160A (en) | 2015-11-11 |
| CN105043160B true CN105043160B (en) | 2023-11-14 |
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| CN201510446769.0A Active CN105043160B (en) | 2015-07-27 | 2015-07-27 | Cooling tower condensation module air inlet control device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105605941B (en) * | 2016-03-28 | 2017-11-03 | 江苏海鸥冷却塔股份有限公司 | A kind of automatic defrosting control system of cooling tower |
| CN108548446B (en) * | 2018-05-07 | 2024-06-04 | 江苏华塔冷却技术有限公司 | Intelligent air inlet adjusting system of cooling tower and adjusting method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB743793A (en) * | 1953-03-20 | 1956-01-25 | Ici Ltd | Improvements in and relating to water-cooling towers |
| CA1167687A (en) * | 1980-03-25 | 1984-05-22 | Robert D. Moore | Adjustable louver assembly |
| KR101082792B1 (en) * | 2010-11-09 | 2011-11-17 | 주식회사 성지공조기술 | High efficiency cooling towers |
| CN202734661U (en) * | 2012-08-30 | 2013-02-13 | 山东华能冷却技术股份有限公司 | Shutter for closed cooling tower |
| CN103575126A (en) * | 2012-08-02 | 2014-02-12 | 康普思创科技(北京)有限公司 | Cooling-tower heat exchanger with evaporated water recovery |
| CN103727805A (en) * | 2014-01-07 | 2014-04-16 | 山东蓝想环境科技股份有限公司 | Deep condensation and demisting environment-friendly device |
| CN104165546A (en) * | 2014-08-14 | 2014-11-26 | 清华大学 | Cooling tower water and energy saving remote monitoring system and monitoring method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204924026U (en) * | 2015-07-27 | 2015-12-30 | 大连理工大学 | Cooling tower condensation module air inlet controlling means |
-
2015
- 2015-07-27 CN CN201510446769.0A patent/CN105043160B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB743793A (en) * | 1953-03-20 | 1956-01-25 | Ici Ltd | Improvements in and relating to water-cooling towers |
| CA1167687A (en) * | 1980-03-25 | 1984-05-22 | Robert D. Moore | Adjustable louver assembly |
| KR101082792B1 (en) * | 2010-11-09 | 2011-11-17 | 주식회사 성지공조기술 | High efficiency cooling towers |
| CN103575126A (en) * | 2012-08-02 | 2014-02-12 | 康普思创科技(北京)有限公司 | Cooling-tower heat exchanger with evaporated water recovery |
| CN202734661U (en) * | 2012-08-30 | 2013-02-13 | 山东华能冷却技术股份有限公司 | Shutter for closed cooling tower |
| CN103727805A (en) * | 2014-01-07 | 2014-04-16 | 山东蓝想环境科技股份有限公司 | Deep condensation and demisting environment-friendly device |
| CN104165546A (en) * | 2014-08-14 | 2014-11-26 | 清华大学 | Cooling tower water and energy saving remote monitoring system and monitoring method thereof |
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| CN105043160A (en) | 2015-11-11 |
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