CN103616907A - Temperature adjusting device for heat exchange experiments - Google Patents
Temperature adjusting device for heat exchange experiments Download PDFInfo
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- CN103616907A CN103616907A CN201310704409.7A CN201310704409A CN103616907A CN 103616907 A CN103616907 A CN 103616907A CN 201310704409 A CN201310704409 A CN 201310704409A CN 103616907 A CN103616907 A CN 103616907A
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Abstract
The invention relates to a temperature adjusting device for heat exchange experiments. The temperature adjusting device comprises a tank body for containing cooling water, wherein the interior of the tank body is divided into a first tank body and a second tank body by a partition plate; a first heating device is mounted in the first tank body, a drain pipe is mounted at the bottom, a water return pipe and a water replenishing pipe are mounted at the top, and an additional drainage pipe and a fourth regulating valve are arranged on the water return pipe; a second heating device is mounted in the second tank body, an overflow pipe is mounted at the upper part of the side wall of the second tank body, a water supply pipeline is mounted at the lower part, and the drain pipe and the overflow pipe are connected with the drainage pipe. The temperature adjusting device provided by the invention is designed against the temperature control range of a cooling water tank, which is required for the experiments, fully utilizes the characteristic of rich industrial water sources in a power plant, and directly uses a method of injecting water at normal temperature to cool the circulating cooling water; compared with the traditional cooling water tank, a compressor is omitted, so that the space is saved. Furthermore, the opening degree of the fourth regulating valve can be reduced to control the flow rate of the cooling water after heat exchange, which is returned to the tank body through the water return pipe and has relatively high temperature.
Description
Technical field
The present invention relates to control field, relate in particular to a kind of local heat transfer register.
Background technology
Cooling water tank belongs to industrial circle and the conventional instrument and equipment of scientific research field, at some, need accurately to control the occasion of cooling procedure parameter, in as cooling in the cavity of laser instrument or some scientific experiment, usually need to pass into the specific chilled water of temperature range in cooling tube.
Conventional cooling water tank generally has two features: if a cooling water circulation utilization, generally need to lower the temperature to chilled water, the method of cooling is used cooling device often, yet, the general volume ratio of compressor is larger, use extra cooling device to make originally just need to take the water tank of large space very heavier, be not suitable for very much in the use of the place of narrow space; If two need to accurately carry out temperature control, what conventionally adopt is the closed loop control method in automatically controlling, this need to increase the complexity of circuit design and control operation on the one hand, and on the other hand due to environmental change, the various setup parameters that need to adjust are in real time to guarantee the accuracy of temperature control.
Figure 1 shows that cooling water tank of the prior art, this cooling water tank is used fan blower and air pump cooperation to carry out cooling to chilled water, this cooling water tank needs extra air-blast device and air extractor, has increased the volume of cooling water tank, does not possess the function of accurate control cooling water temperature simultaneously.
At present, in the research heat transfer characteristic of boiler tail flue gas and the experiment of corrosive property, in order to study the impact of heat interchanger wall temperature heat exchanger heat exchange property, need to control heat interchanger wall temperature by the temperature of accurate control chilled water.In this experiment, because boiler tail flue gas complicated component, temperature are high, simulated experiment platform difficulty is built in laboratory, so experiment mainly completes in the actual motion environment of power plant, experiment condition is subject to a lot of restrictions.Such as the layout of power plant is generally very compact, operating space is narrow and small, and the conventional cooling water tank with compressor is not suitable for this workplace; Power plant's experiment condition is simple and crude on the other hand, and environment is noisy, and experimenter wishes to use the simple control method of trying one's best to complete experiment.
Summary of the invention
The object of this invention is to provide a kind of local heat transfer register, for the particular surroundings of power plant, be applicable to the cooling use in power plant.
The technical scheme that the present invention takes is:
A kind of local heat transfer register, comprise the casing of containing chilled water, in casing, be provided with dividing plate casing is separated into the first casing and the second casing, in the first casing, first heater is installed, bottom is provided with leak-off pipe, top is provided with return pipe and filling pipe, return pipe is provided with additional drainage pipe and the 4th variable valve, in the second casing, secondary heating mechanism is installed, the top of the second wall box is provided with run-down pipe, bottom is provided with water supply line, and leak-off pipe is all connected with drainpipe with run-down pipe.
The volume of the first described casing is greater than the volume of described the second casing, and particularly, the volume of the first casing is the twice of the volume of described the second casing.The power of described first heater is greater than the power of described secondary heating mechanism, and particularly, the power of described first heater is 4KW, and the power of described secondary heating mechanism is 1KW.
Described the first casing communicates above dividing plate with the second casing, and described run-down pipe is positioned at the sidewall top position of the second casing and its height lower than the height of described dividing plate, thereby the water uniaxially in the first casing is flowed in the second casing.
The temperature sensor of surveying water temperature in the second water tank is installed on described dividing plate, and described water supply line inside is provided with the temperature sensor of surveying water supply water temperature.
The first variable valve and water pump are installed on described water supply line, the second variable valve is installed on described filling pipe, the 3rd variable valve is installed on described leak-off pipe.Each temperature sensor and heating arrangement are connected with controller, are controlled by the controller.Controller comprises power supply, the first temperature controller being connected with the first temperature sensor, the second temperature controller being connected with the second temperature sensor, the first temperature controller is by the first Control first heater, and the second temperature controller is by the second Control secondary heating mechanism.Water supply line outwards supplies water by water pump.
When the invention solves water tank and being applied in summer high temperature environment (as environment temperature reaches more than 35 ℃, now as the water temperature of power plant's normal temperature process water of make-up water generally at nearly 30 ℃), want the temperature of chilled water to be controlled at below 35 ℃, that the aperture of the second variable valve need to be opened is very large, to increase the increment of normal-temperature water, and simultaneously, because arranging, power plant needs, drainpipe is often very long, resistance is very large, may cause not in time water tank spilling water because of draining, the problem that water tank cannot be worked.On return pipe, increased by the 4th variable valve, and draw additional drainage pipe on the pipeline before the 4th variable valve, in the time the temperature of chilled water need to being controlled to lower temperature, the aperture that can turn the 4th variable valve down is to control the flow that returns to chilled water after the heat exchange that the temperature of casing is higher by return pipe.
The beneficial effect compared with prior art having:
1) in the power plant's local heat transfer the present invention relates to, the temperature range of required chilled water is 35 ℃-80 ℃, for this temperature control scope, the present invention takes full advantage of the feature of power plant's industry abundant water, directly use the method for injecting normal-temperature water to carry out cooling to recirculated cooling water, compare traditional cooling water tank and reduced compressor, saved space, be suitable for carrying out field experiment use in power plant.
2) the present invention is two body structures by waterbox design, adopt the design of two-stage temperature control, use high power heater coarse adjustment temperature in large casing, use low-power heating device in small box, temperature to be finely tuned, temperature control efficiency and temperature-controlled precision have been guaranteed simultaneously, without complicated control method, can realize accurate temperature controlling, error reaches in 1 ℃.
Accompanying drawing explanation
Fig. 1 is existing cooling water tank schematic diagram;
Fig. 2 is the schematic diagram of two-stage cooling water tank in the embodiment of the present invention;
Fig. 3 is the schematic diagram of embodiment of the present invention middle controller;
1. casing, 2. controller, 3. dividing plate, 41. water supply lines, 42. return pipes, 43. filling pipes, 44. drainpipes, 45. additional drainage pipes, 441. leak-off pipes, 442. run-down pipes, 51. first heaters, 52. secondary heating mechanisms, 61. first variable valve, 62. second variable valve, 63. the 3rd variable valve, 64. the 4th variable valve, 71. first temperature sensors, 72. second temperature sensors, 8. water pump, 11. first casings, 12. second casings, 21. power supplys, 221. first temperature controllers, 222. second temperature controllers, 231. first relays, 232. second relays.
Embodiment
Below in conjunction with embodiment, further illustrate.
Embodiment 1
As shown in Figure 2, a kind of local heat transfer register, comprise the casing 1 of containing chilled water, in casing 1, be provided with dividing plate 3 casing is separated into the first casing 11 and the second casing 12, and the first casing 11 and the second casing 22 communicate above dividing plate 3, in the first casing 11, first heater 51 is installed, bottom is provided with leak-off pipe 441, top is provided with return pipe 42 and filling pipe 43, return pipe 42 is provided with additional drainage pipe 45 and the 4th variable valve 64, in the second casing 12, secondary heating mechanism 52 is installed, the top of the second casing 12 sidewalls is provided with run-down pipe 442, bottom has been installed on water supply line 41, leak-off pipe 441 is all connected with drainpipe 44 with run-down pipe 442.
The volume of the first casing 11 is greater than the volume of described the second casing 12, and particularly, the volume of the first casing 11 is twices of the volume of described the second casing 12.The power of first heater is greater than the power of described secondary heating mechanism, and particularly, the power of described first heater is 4KW, and the power of described secondary heating mechanism is 1KW.
Leak-off pipe 441 is positioned at the sidewall top position of described the second casing and its height lower than the height of described dividing plate 3, thereby the water uniaxially in the first casing is flowed in the second casing.。
Water supply line 41 is positioned at the position that described the second wall box below approaches bottom, by water pump 8, to outside, supplies water.
Dividing plate 3 is provided with the first temperature sensor 71 near the top of the first casing one side, and for measuring the water temperature in the first casing 11, described water supply line 41 inside are provided with the second temperature sensor 72.The first variable valve 61 and water pump 8 are installed on water supply line 41, the second variable valve 62 is installed on described filling pipe 43, the 3rd variable valve 63 is installed on described leak-off pipe 441.Each temperature sensor and heating arrangement are connected with controller 2, are controlled by the controller.
The controller that the two-stage cooling water tank that the present embodiment provides is used comprises power supply 21, the first temperature controller 221 being connected with described the first temperature sensor 71, the second temperature controller 222 being connected with described the second temperature sensor 72, described the first temperature controller 221 is controlled the work of described first heater 51 by the first relay 231, described the second temperature controller is controlled described secondary heating mechanism 52 work by the second relay 232.
In the present embodiment, cooling water tank, for boiler exhaust gas local heat transfer, provides the chilled water of 55 ℃ to heat exchanger tube.Heat exchanger tube is arranged in the flue after boiler air preheater, this section of flue gas in flue temperature is between 110-140 ℃, by measuring parameters such as inflow temperature, leaving water temperature, cooling water flow, observation heat exchanger tube temperature, seek the impact of the pipe surface temperature exchange heat pipe heat exchange property of the heat exchanger tube that is arranged in boiler exhaust gas.
The course of work of water tank is as follows:
Heating period, close the 3rd variable valve 63, the first variable valve 61 and water pump 8, by moisturizing pipeline, in water tank, filling with water, is 52 ℃ by the control Temperature Setting of the first temperature controller 221 and the second temperature controller, heats the chilled water to 52 ℃ in the first casing 11 and the second casing 12.
Working stage, is 53 ℃ by the control Temperature Setting of the first temperature controller 221, and the control Temperature Setting of the second temperature controller 222 is 55 ℃, opens the first variable valve 61 and water pump 8.By regulating the aperture of the first variable valve 61, control the flow of inlet water of chilled water, the heat transfer characteristic that can observe tube wall under various heat exchange amount.By changing the first temperature controller 221, the design temperature of the second temperature controller 222 and the flow of filling pipe 43, can control the water temperature of constant temperature water tank and work between 40-80 ℃.
Ending phase, first closes the second variable valve 62, opens the water in emptying the first casing 11 of the 3rd variable valve 63, and after the water in the second casing 12 is drained by water pump 8, the 8 and first variable valve 61 switches off the pump.
When the temperature of chilled water being controlled to lower temperature, during as 35 ℃, the aperture that can turn the 4th variable valve 64 down is to control the flow that returns to chilled water after the heat exchange that the temperature of casing is higher by return pipe 42.
By increasing the 4th variable valve 64 and additional drainage pipe 45, the cooling water tank described in the present embodiment can provide the chilled water of 30 ℃-90 ℃ in summer high temperature environment.Because the temperature of boiler exhaust gas acid dew point is generally more than 70 ℃, the temperature of water dew point is generally between 30-40 ℃, therefore, the temperature range of the chilled water that this water tank provides can heat exchanging tube wall temperature be controlled those skilled in the art, observes near the heat transfer characteristic of heat exchanger tube wall temperature heat exchanger tube these two dewpoint temperatures time.
Claims (5)
1. a local heat transfer register, comprise casing and the controller of containing chilled water, it is characterized in that, in casing, be provided with dividing plate casing is separated into the first casing and the second casing, in the first casing, first heater is installed, bottom is provided with leak-off pipe, top is provided with return pipe and filling pipe, return pipe is provided with additional drainage pipe and the 4th variable valve, in the second casing, secondary heating mechanism is installed, the top of the second wall box is provided with run-down pipe, and bottom is provided with water supply line, and leak-off pipe is all connected with drainpipe with run-down pipe.
2. a kind of local heat transfer register according to claim 1, it is characterized in that, the first temperature sensor of surveying water temperature in the first casing is installed on described dividing plate, described water supply line inside is provided with the second temperature sensor of surveying water supply water temperature, the first variable valve and water pump are installed on described water supply line, the second variable valve is installed on described filling pipe, the 3rd variable valve is installed on described leak-off pipe, each temperature sensor and heating arrangement are connected with controller.
3. a kind of local heat transfer register according to claim 2, it is characterized in that, described controller comprises power supply, the first temperature controller being connected with the first temperature sensor, the second temperature controller being connected with the second temperature sensor, the first temperature controller is by the first Control first heater, and the second temperature controller is by the second Control secondary heating mechanism.
4. a kind of local heat transfer register according to claim 1, is characterized in that, the volume of the first described casing is greater than the volume of described the second casing.
5. a kind of local heat transfer register according to claim 1, is characterized in that, the power of described first heater is greater than the power of described secondary heating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310704409.7A CN103616907B (en) | 2013-12-19 | 2013-12-19 | Temperature adjusting device for heat exchange experiments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310704409.7A CN103616907B (en) | 2013-12-19 | 2013-12-19 | Temperature adjusting device for heat exchange experiments |
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| Publication Number | Publication Date |
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| CN103616907A true CN103616907A (en) | 2014-03-05 |
| CN103616907B CN103616907B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310704409.7A Expired - Fee Related CN103616907B (en) | 2013-12-19 | 2013-12-19 | Temperature adjusting device for heat exchange experiments |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105373160A (en) * | 2015-11-13 | 2016-03-02 | 通用国际企业有限公司 | Liquid heating system and method thereof |
| CN112144069A (en) * | 2020-09-25 | 2020-12-29 | 阳光电源股份有限公司 | Spray coating device and temperature adjusting method for spray coating device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2173967Y (en) * | 1993-11-30 | 1994-08-10 | 曹振寿 | Circulating water temp. controller |
| US20030093186A1 (en) * | 2001-11-15 | 2003-05-15 | Patterson Wade C. | System and method for controlling temperature of a liquid residing within a tank |
| CN101275872A (en) * | 2008-04-24 | 2008-10-01 | 庄瑞国 | Automatic constant temperature fluid bath |
| CN203338170U (en) * | 2013-07-02 | 2013-12-11 | 福建兴宇树脂有限公司 | Automatic thermostat |
| CN203606713U (en) * | 2013-12-19 | 2014-05-21 | 山东大学 | Temperature adjustment apparatus used for heat transfer experiment |
-
2013
- 2013-12-19 CN CN201310704409.7A patent/CN103616907B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2173967Y (en) * | 1993-11-30 | 1994-08-10 | 曹振寿 | Circulating water temp. controller |
| US20030093186A1 (en) * | 2001-11-15 | 2003-05-15 | Patterson Wade C. | System and method for controlling temperature of a liquid residing within a tank |
| CN101275872A (en) * | 2008-04-24 | 2008-10-01 | 庄瑞国 | Automatic constant temperature fluid bath |
| CN203338170U (en) * | 2013-07-02 | 2013-12-11 | 福建兴宇树脂有限公司 | Automatic thermostat |
| CN203606713U (en) * | 2013-12-19 | 2014-05-21 | 山东大学 | Temperature adjustment apparatus used for heat transfer experiment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105373160A (en) * | 2015-11-13 | 2016-03-02 | 通用国际企业有限公司 | Liquid heating system and method thereof |
| CN112144069A (en) * | 2020-09-25 | 2020-12-29 | 阳光电源股份有限公司 | Spray coating device and temperature adjusting method for spray coating device |
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| Publication number | Publication date |
|---|---|
| CN103616907B (en) | 2015-06-17 |
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Granted publication date: 20150617 Termination date: 20171219 |