CN105371692B - Heat exchanger cooling water flow control system and its adjusting method - Google Patents
Heat exchanger cooling water flow control system and its adjusting method Download PDFInfo
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- CN105371692B CN105371692B CN201510731623.0A CN201510731623A CN105371692B CN 105371692 B CN105371692 B CN 105371692B CN 201510731623 A CN201510731623 A CN 201510731623A CN 105371692 B CN105371692 B CN 105371692B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
Abstract
The present invention discloses a kind of heat exchanger cooling water flow control system.The heat exchanger cooling water flow control system is used for the heat exchanger that controlled load case is stablized, including acquisition module, judgment module, correction module, adjustment module and computing module.The present invention also provides a kind of adjusting method of heat exchanger cooling water flow control system.Using heat exchanger cooling water flow control system provided by the invention and its adjusting method, compare by simple flow-rate adjustment and with reference to slope, the working status of heat exchanger present operating point can be analyzed, and then approach cooling water economic flow, not only make cooling water water consumption sufficiently small as far as possible but also ensure certain anti-technological fluctuation ability, this method has the advantages that easy to operate, fast and effective, universality is good and safe.
Description
Technical field
The present invention relates to cooling water flow regulation technology field, and in particular, to a kind of heat exchanger cooling water flow control
System and its adjusting method.
Background technology
Heat transmission equipment is the main object of industrial circulating cooling water service, especially in the industrial circles such as petrochemical industry, exhausted big portion
The processing medium for dividing industrial circulating cooling water to be used in cooling heat exchanger.Flow into the cooling water flow and processing medium of heat exchanger
The temperature difference that cools down is in a kind of positively nonlinear correlation relation, i.e., in processing medium composition, inlet temperature, flow, cooling water inlet temperature
In the case of constant etc. condition, with the increase of cooling water flow, the entrance temperature difference (inlet temperature-outlet temperature of processing medium
Degree) increase；But this relation is not linear relationship, but a kind of nonlinear trend, i.e., when cooling water flow increase to it is a certain
Degree and then increasing water consumption, the entrance temperature difference of processing medium simply slowly increase.
The heat exchanger for not installing negative-feedback automatic controller since the industrial circles such as the presence of this rule, petrochemical industry are some is cold
But water consumption is often in superfluous state, in the prior art part of the manufacturer by improve the method for the processing medium outlet temperature upper limit come
Cooling water amount is reduced, but this is empirical, and do not possess universality and security, once as long as misoperation slightly technique
Fluctuation may trigger follow-up chain drastic change.
Thus, it is necessary to be further improved to the mode of above-mentioned adjusting heat exchanger cooling water flow, lacked to avoid above-mentioned
Fall into.
The content of the invention
In order to solve the mode of above-mentioned adjusting heat exchanger cooling water flow there are energy waste, universality is bad and security
Low technical problem, the present invention provide a kind of heat exchanger cooling water flow control system and its adjusting method, have it is easy to operate,
The advantages of universality is good and safe.
The present invention provides a kind of heat exchanger cooling water flow control system, and the heat exchanger cooling water flow control system is used
In the heat exchanger that controlled load case is stablized, including acquisition module, judgment module, correction module, adjustment module and computing module；
The acquisition module, for acquisition parameter, the cooling water flow of the parameter including heat exchanger present operating point and
Processing medium temperature difference, the processing medium temperature difference are situated between for the processing medium inlet temperature of heat exchanger present operating point with technique
The difference of matter outlet temperature；
The judgment module, for providing criterion, the technique gathered according to criterion to the acquisition module is situated between
Matter temperature difference is judged that the criterion is the processing medium temperature difference in the design of the processing medium temperature difference
In lower range；
The correction module, for the processing medium temperature of criterion after judgment module judgement, will not to be met
Difference is corrected；
The adjustment module, for will through the judgment module judgement after, processing medium temperature difference meets criterion
Heat exchanger carries out cooling water flow adjusting；
The computing module, for the adjusting result slope calculations K according to the adjustment module and judges slope K and economy
The magnitude relationship of slope K c, selects the heat exchanger operating point of K >=Kc as work economy point.
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the stable conditions are
It is constant to refer to the composition of processing medium, the inlet temperature of the processing medium, flow are in fluctuation range, heat exchanger cooling water inlet
Temperature is in fluctuation range.
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the fluctuation range is
± 0.5%.
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the adjustment module bag
Include：
Flow regulating unit, for carrying out cooling water flow adjusting, using the cooling water flow of heat exchanger present operating point as
Basis, precentagewise adjust heat exchanger cooling water flow；
Temperature measurement unit, measurement processing medium temperature after being adjusted for the flow regulating unit to cooling water flow
Difference.
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the heat exchanger cooling
Between the percentage range that water flow is adjusted is 0.5% to 10%.
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the meter of the slope K
Calculating formula is：
Difference/cooling water flow of slope K=processing medium temperature difference is poor=(after adjusting before processing medium temperature difference-adjusting
Processing medium temperature difference)/(adjusting cooling water flow before postcooling water flow-adjusting).
In a kind of preferred embodiment of heat exchanger cooling water flow control system provided by the invention, the economic slope K c
For a constant, and in the range of 0.005~0.05.
The present invention also provides a kind of adjusting method of heat exchanger cooling water flow control system, comprise the following steps：
Step 1: acquisition parameter：User carries out parameter acquisition, the ginseng by acquisition module heat exchanging device present operating point
Number includes the cooling water flow and processing medium temperature difference of heat exchanger present operating point；
Step 2: parameter judges and correction：User judges processing medium temperature difference according to judgment module, according to sentencing
Disconnected result confirms to be corrected or enter step three；
Step 3: regulating calculation：Flow regulating unit and temperature measurement unit are provided, user sentences according to the parameter of step 2
Break as a result, being adjusted by flow regulating unit heat exchanging device cooling water flow, with the cooling water of heat exchanger present operating point
Based on flow, precentagewise improves heat exchanger cooling water flow, measures processing medium temperature by temperature measurement unit afterwards
Difference, and computing module slope calculations K is passed through according to the adjusting result of adjustment module1, and judge the slope K1With economic slope K c
Magnitude relationship；
Work as K1During >=Kc, heat exchanger present operating point has been work economy point, terminates to adjust.
In a kind of preferred embodiment of adjusting method of heat exchanger cooling water flow control system provided by the invention, terminate
After step 3, further include：
Step 4: regulating calculation again：Work as K1<During Kc, carried out by flow regulating unit heat exchanging device cooling water flow
Adjust again, reduce heat exchanger cooling water flow, return to heat exchanger present operating point, then with the cold of heat exchanger present operating point
But based on water flow, precentagewise reduces heat exchanger cooling water flow, and processing medium temperature is measured by temperature measurement unit
Difference, passes through computing module slope calculations K again according to the adjusting result of adjustment module2, and judge the slope K2With economic slope
The magnitude relationship of Kc；
Work as K2<During Kc, repeat step four；
Work as K2When=Kc or processing medium temperature difference reach the design lower limit of processing medium temperature difference, heat exchanger work at present
Point has been work economy point, terminates to adjust.
It is described in a kind of preferred embodiment of adjusting method of heat exchanger cooling water flow control system provided by the invention
Step 2 parameter judges to include with correction：
User judges processing medium temperature difference according to judgment module, if meet criterion, it is described to judge mark
Standard is the processing medium temperature difference in the range of the design bound of the processing medium temperature difference；
After judgment module judgement, confirmed to be corrected or enter step three according to judging result：
After judgment module judgement, if processing medium temperature difference does not meet criterion, carried out by correction module
Correction, trimming process afterwards again judge processing medium temperature difference；The trimming process includes：
When the processing medium temperature difference of heat exchanger present operating point is more than the design upper limit of processing medium temperature difference, reduce
Heat exchanger cooling water flow is until processing medium temperature difference enters in the range of the design bound of processing medium temperature difference；
When the processing medium temperature difference of heat exchanger present operating point is less than the design lower limit of processing medium temperature difference, improve
Heat exchanger cooling water flow is until processing medium temperature difference enters in the range of the design bound of processing medium temperature difference；
After judgment module judgement, if processing medium temperature difference meets criterion, three are entered step.
Compared to the prior art, heat exchanger cooling water flow control system provided by the invention and its adjusting method have with
Lower beneficial effect：
First, the present invention compares by simple flow-rate adjustment and with reference to slope, it is possible to analyzes heat exchanger work at present
The working status of point, and then cooling water economic flow is approached, not only make cooling water water consumption sufficiently small as far as possible but also ensure certain resist
Technological fluctuation ability, method is easy to operate, universality is good.
2nd, the present invention is suitable for the heat exchanger of stable conditions, and financial cost is low, and safe.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is the structure diagram of one embodiment of heat exchanger cooling water flow control system provided by the invention；
Fig. 2 is the flow chart of one embodiment of adjusting method of heat exchanger cooling water flow control system provided by the invention；
Fig. 3 be heat exchanger cooling water flow control system shown in Fig. 2 adjusting method in step S2 work flow diagram；
Fig. 4 be heat exchanger cooling water flow control system shown in Fig. 2 adjusting method in step S3 work flow diagram；
Fig. 5 be heat exchanger cooling water flow control system shown in Fig. 2 adjusting method in step S4 work flow diagram；
Fig. 6 is the working curve diagram of the adjusting method of heat exchanger cooling water flow control system shown in Fig. 2.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the structure diagram for one embodiment of heat exchanger cooling water flow control system provided by the invention.Institute
State heat exchanger cooling water flow control system 1 and be used for the heat exchanger that controlled load case is stablized, the stable conditions refer to processing medium
Composition it is constant, in fluctuation range, heat exchanger cooling water inlet temperature is fluctuating for the inlet temperature of the processing medium, flow
In the range of, the fluctuation range is ± 0.5%.The heat exchanger cooling water flow control system 1 includes acquisition module 11, judges
Module 13, correction module 15, adjustment module 17 and computing module 19.
The acquisition module 11 is used for acquisition parameter.The parameter includes the cooling current of the heat exchanger present operating point
Amount and processing medium temperature difference.Wherein, the processing medium temperature difference enters for the processing medium of the heat exchanger present operating point
The difference of mouth temperature and processing medium outlet temperature.
The judgment module 13 is used to provide criterion, its work gathered according to criterion to the acquisition module 11
Skill medium temperature difference judged, wherein, the criterion is the processing medium temperature difference in the processing medium temperature
In the range of the design bound of difference.
The technique that the correction module 15 is used to after the judgment module 13 judges, not meeting the criterion is situated between
Matter temperature difference is corrected.
The adjustment module 17 is used for will be after the judgment module 13 judges, processing medium temperature difference meets the judgement
The heat exchanger of standard carries out cooling water flow adjusting.The adjustment module 17 includes flow regulating unit 171 and temperature survey list
Member 173.The flow regulating unit 171 is used to carry out heat exchanger cooling water flow adjusting.The flow regulating unit 171 is to change
Based on the cooling water flow of hot device present operating point, precentagewise adjusts heat exchanger cooling water flow.The heat exchanger cooling
Between the percentage range that water flow is adjusted is 0.5% to 10%.The temperature measurement unit 173 is used for the flow-rate adjustment list
Measurement processing medium temperature difference after 171 pairs of cooling water flows of member are adjusted.
The computing module 19 be used for according to the adjusting result slope calculations K of the adjustment module 17 and judge slope K with
The magnitude relationship of economic slope K c, selects the heat exchanger operating point of K >=Kc as work economy point.In the computing module 19
In calculating process, the calculation formula of the slope K is：Difference/cooling water flow of slope K=processing medium temperature difference is poor=(adjusts
Processing medium temperature difference before processing medium temperature difference-adjusting after section)/(adjusting cooling water flow before postcooling water flow-adjusting).
The economic slope K c is a constant, and the scope of the economic slope K c is 0.005~0.05.
Please refer to Fig. 2, implement for the adjusting method one of heat exchanger cooling water flow control system provided by the invention
The flow chart of example.The step of adjusting method of the heat exchanger cooling water flow control system, is as follows：
Step S1, acquisition parameter：User carries out parameter acquisition by the 11 heat exchanging device present operating point of acquisition module；
The parameter includes the cooling water flow and processing medium temperature difference of heat exchanger present operating point；
Step S2, parameter judges and corrects：User carries out the processing medium temperature difference by the judgment module 13
Judge, if meet criterion, the criterion is the processing medium temperature difference in the processing medium temperature difference
Design in the range of bound；
After the judgment module 13 judgement, confirmed to be corrected or enter step S3 according to judging result；
Step S3, regulating calculation：Flow regulating unit 171 and temperature measurement unit 173 are provided, user is according to step S2's
Parameter judging result, is adjusted the heat exchanger cooling water flow by the flow regulating unit 171, and by described
Temperature measurement unit 173 measures processing medium temperature difference, then carries out slope calculations K by the computing module 191, and judge institute
State slope K1With the magnitude relationship of the economic slope K c；
Work as K1During >=Kc, heat exchanger present operating point has been work economy point, terminates to adjust；
Work as K1<During Kc, S4 is entered step, carries out regulating calculation again；
Step S4, regulating calculation again：The heat exchanger cooling water flow is carried out by the flow regulating unit 171
Adjust again, and processing medium temperature difference is measured by the temperature measurement unit 173, then calculated by the computing module 19
Slope K2And judge the slope K2With the magnitude relationship of the economic slope K c；
Work as K2<During Kc, repeat step S4；
Work as K2When=Kc or processing medium temperature difference reach the design lower limit of processing medium temperature difference, heat exchanger work at present
Point has been work economy point, terminates to adjust.
Please refer to Fig. 3, for the stream of step S2 in the adjusting method of heat exchanger cooling water flow control system shown in Fig. 2
Cheng Tu.The step S2 includes：
S21, user judge parameter process medium temperature difference according to the judgment module 13, if meet judgement mark
Standard, the criterion are the processing medium temperature difference in the range of the design bound of the processing medium temperature difference；
After the judgment module 13 judgement, confirmed to be corrected or enter step S3 according to judging result：
S22, through the judgment module 13 judgement after, if processing medium temperature difference does not meet criterion, pass through the school
Positive module 15 is corrected, and processing medium temperature difference is judged again after trimming process；The trimming process includes：
S22-1, when heat exchanger present operating point processing medium temperature difference be more than processing medium temperature difference the design upper limit
When, heat exchanger cooling water flow is reduced until processing medium temperature difference enters the design bound scope of processing medium temperature difference
It is interior；
S22-2, when heat exchanger present operating point processing medium temperature difference be less than processing medium temperature difference design lower limit
When, heat exchanger cooling water flow is improved until processing medium temperature difference enters the design bound scope of processing medium temperature difference
It is interior；
After the judgment module 13 judgement, if processing medium temperature difference meets criterion, S3 is entered step.
Please in conjunction with refering to Fig. 4, be heat exchanger cooling water flow control system shown in Fig. 2 adjusting method in step S3
Work flow diagram.The step S3 includes：
S31, based on the cooling water flow of heat exchanger present operating point, by the flow regulating unit 171 press hundred
Divide than improving heat exchanger cooling water flow；
S32, pass through the temperature measurement unit 173 measurement processing medium temperature difference；
S33, according to the adjusting of the adjustment module 17 as a result, passing through the 19 slope calculations K of computing module1, and carry out
Judge, judge the slope K1With the magnitude relationship of the economic slope K c：
Work as K1During >=Kc, heat exchanger present operating point has been work economy point, terminates to adjust；
Work as K1<During Kc, S4 is entered step.
Please in conjunction with refering to Fig. 5, be heat exchanger cooling water flow control system shown in Fig. 2 adjusting method in step S4
Work flow diagram.The step S4 includes the following steps：
S41, reduce heat exchanger cooling water flow, returns to heat exchanger present operating point；
S42, based on the cooling water flow of heat exchanger present operating point, by the flow regulating unit 171 press hundred
Divide than reducing heat exchanger cooling water flow；
S43, pass through the temperature measurement unit 173 measurement processing medium temperature difference；
S44, according to the adjusting result of the adjustment module 17 pass through the computing module 19 slope calculations K again2Go forward side by side
Row judges, judges the slope K2With the magnitude relationship of the economic slope K c；
Work as K2<During Kc, repeat step S42；
Work as K2When=Kc or processing medium temperature difference reach the design lower limit of processing medium temperature difference, heat exchanger work at present
Point has been work economy point, terminates to adjust.
Referring to Fig. 6, the working curve diagram of the adjusting method for the control system of heat exchanger cooling water flow shown in Fig. 2.
In the present embodiment, the heat exchanger is shell-and-tube contra-flow heat exchanger, and tube side walks recirculated cooling water, and inlet temperature is 25 DEG C, shell side
Processing medium is walked, inlet temperature is 60 DEG C, and the processing medium designed temperature difference upper limit is 15 DEG C, and lower limit is 14 DEG C, that is, allows outlet temperature
Up to 46 DEG C, minimum 45 DEG C of degree.
Wherein, the cooling water flow control process of the heat exchanger is as follows：
First, acquisition parameter：
Shell-and-tube contra-flow heat exchanger projected working point described in Site Detection is I points, is gathered and joined by the acquisition module 11
Number；
Parameter：The cooling water flow of the shell-and-tube contra-flow heat exchanger present operating point I points is 800m3/ h, processing medium
Temperature difference is 14.8 DEG C, subsequently into step S2；
Secondly, parameter judges and corrects：
The processing medium temperature difference of the shell-and-tube contra-flow heat exchanger present operating point I points is 14.8 DEG C, criterion：Work
Skill medium temperature difference is in the design bound scope (14 DEG C~15 DEG C) of processing medium temperature difference, according to the judgment module 13
Judge that the processing medium temperature difference of the shell-and-tube contra-flow heat exchanger present operating point I points meets criterion, enter step S3；
Again, first time regulating calculation：
By the cooling water flow (800m of the shell-and-tube contra-flow heat exchanger present operating point I points3/ h) pass through the flow
Adjustment unit 171 is improved to 816m by 2%3/h；
Processing medium temperature difference is measured by the temperature measurement unit 173 after device stabilization and is changed into 14.9 DEG C, work
Point is moved to A1；
Calculated according to the adjusting result of the adjustment module 17 by the computing module 19：
Economic slope K c=0.02, slope K1=(14.9-14.8)/(816-800)=0.00625；
K1=0.00625<Kc=0.02；
Due to K1<Kc, therefore enter step S4；
Then, second of regulating calculation：
Heat exchanger cooling water flow is reduced by the flow regulating unit 171, returning to heat exchanger by operating point A1 works as
Preceding operating point I points；
By the cooling water flow (800m of the shell-and-tube contra-flow heat exchanger present operating point I points3/ h) pass through the flow
Adjustment unit 171 is reduced to 784m by 2%3/h；
Processing medium temperature difference is measured by the temperature measurement unit 173 after device stabilization and is changed into 14.5 DEG C, work
Point is moved to B1；
Calculated according to the adjusting result of the adjustment module 17 by the computing module 19：
Economic slope K c=0.02, slope K2=(14.5-14.8)/(784-800)=0.01875
K2=0.01875<Kc=0.02；
Due to K2<Kc, therefore repeat step S4-2；
Finally, third time regulating calculation：
By the cooling water flow (784m of B1 points3/ h) 764m is reduced to by 2.5% by the flow regulating unit 1713/
h；
Processing medium temperature difference is measured by the temperature measurement unit 173 after device stabilization and is changed into 14.1 DEG C, work
Point is moved to B2；
Calculated according to the adjusting result of the adjustment module 17 by the computing module 19：
Economic slope K c=0.02, slope K3=(14.1-14.5)/(764-784)=0.02；
K3=Kc；Processing medium temperature difference is still above the design lower limit of processing medium temperature difference, but K at this time3=Kc, after
It is continuous reduce heat exchanger cooling water flow be possible to cause the drastically steep drop of processing medium temperature so as to cause fluctuation of service and
Technique big ups and downs, so when need to stop adjusting, therefore, the cooling water economic flow of the shell-and-tube contra-flow heat exchanger is
764m3/h。
Heat exchanger cooling water flow control system provided by the invention and its adjusting method have the advantages that：
First, the present invention compares by simple flow-rate adjustment and with reference to slope, it is possible to analyzes heat exchanger work at present
The working status of point, and then cooling water economic flow is approached, not only make cooling water water consumption sufficiently small as far as possible but also ensure certain resist
Technological fluctuation ability, method is easy to operate, universality is good.
2nd, the present invention is suitable for the heat exchanger of stable conditions, and financial cost is low, and safe.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of heat exchanger cooling water flow control system, it is steady that the heat exchanger cooling water flow control system is used for controlled load case
Fixed heat exchanger, it is characterised in that including acquisition module, judgment module, correction module, adjustment module and computing module；
The acquisition module, for acquisition parameter, the parameter includes the cooling water flow and technique of heat exchanger present operating point
Medium temperature is poor, and the processing medium temperature difference goes out for the processing medium inlet temperature of heat exchanger present operating point with processing medium
The difference of mouth temperature；
The judgment module, for providing criterion, the processing medium temperature that is gathered according to criterion to the acquisition module
Degree difference is judged that the criterion is design bound of the processing medium temperature difference in the processing medium temperature difference
In the range of；
The correction module, for will after judgment module judgement, not meet the processing medium temperature difference of criterion into
Row correction；
The adjustment module, for will through the judgment module judgement after, processing medium temperature difference meets the heat exchange of criterion
Device carries out cooling water flow adjusting；
The computing module, for the adjusting result slope calculations K according to the adjustment module and judges slope K and economic slope
The magnitude relationship of Kc, selects the heat exchanger operating point of K >=Kc as work economy point, wherein, the calculation formula of the slope K
For：Difference/cooling water flow of slope K=processing medium temperature difference is poor=and (technique is situated between before processing medium temperature difference-adjusting after adjusting
Matter temperature difference)/(adjusting cooling water flow before postcooling water flow-adjusting).
2. heat exchanger cooling water flow control system according to claim 1, it is characterised in that the stable conditions refer to
The composition of processing medium is constant, and the inlet temperature of the processing medium, flow are in fluctuation range, heat exchanger cooling water inlet temperature
Degree is in fluctuation range.
3. heat exchanger cooling water flow control system according to claim 2, it is characterised in that the fluctuation range for ±
0.5%.
4. heat exchanger cooling water flow control system according to claim 1, it is characterised in that the adjustment module bag
Include：
Flow regulating unit, for carrying out cooling water flow adjusting, based on the cooling water flow of heat exchanger present operating point,
Precentagewise adjusts heat exchanger cooling water flow；
Temperature measurement unit, measurement processing medium temperature difference after being adjusted for the flow regulating unit to cooling water flow.
5. heat exchanger cooling water flow control system according to claim 4, it is characterised in that the heat exchanger cooling water
Between the percentage range of flow-rate adjustment is 0.5% to 10%.
6. heat exchanger cooling water flow control system according to claim 1, it is characterised in that the economic slope K c is
One constant, and in the range of 0.005~0.05.
7. a kind of adjusting method of heat exchanger cooling water flow control system, it is characterised in that comprise the following steps：
Step 1: acquisition parameter：User carries out parameter acquisition, the parameter bag by acquisition module heat exchanging device present operating point
The cooling water flow and processing medium temperature difference of heat exchanger present operating point are included, the processing medium temperature difference is current for heat exchanger
The processing medium inlet temperature of operating point and the difference of processing medium outlet temperature；
Step 2: parameter judges and correction：User judges processing medium temperature difference according to judgment module, is tied according to judgement
Fruit confirms to be corrected or enter step three；
Step 3: regulating calculation：Flow regulating unit and temperature measurement unit are provided, user judges knot according to the parameter of step 2
Fruit, is adjusted by flow regulating unit heat exchanging device cooling water flow, with the cooling water flow of heat exchanger present operating point
Based on, precentagewise improves heat exchanger cooling water flow, measures processing medium temperature difference by temperature measurement unit afterwards, and
Computing module slope calculations K is passed through according to the adjusting result of adjustment module1, and judge the slope K1It is big with economic slope K c
Small relation, wherein, the calculation formula of slope K is：Difference/cooling water flow of slope K=processing medium temperature difference is poor=(after adjusting
Processing medium temperature difference before processing medium temperature difference-adjusting)/(adjusting cooling water flow before postcooling water flow-adjusting)；
Work as K1During >=Kc, heat exchanger present operating point has been work economy point, terminates to adjust；
Step 4: regulating calculation again：Work as K1<During Kc, adjusted again by flow regulating unit heat exchanging device cooling water flow
Section, reduces heat exchanger cooling water flow, returns to heat exchanger present operating point, then the cooling current with heat exchanger present operating point
Based on amount, precentagewise reduces heat exchanger cooling water flow, and processing medium temperature difference is measured by temperature measurement unit, according to
The adjusting result of adjustment module passes through computing module slope calculations K again2, and judge the slope K2It is big with economic slope K c
Small relation；
Work as K2<During Kc, repeat step four；
Work as K2When=Kc or processing medium temperature difference reach the design lower limit of processing medium temperature difference, heat exchanger present operating point is
For the economic point that works, terminate to adjust.
8. the adjusting method of heat exchanger cooling water flow control system according to claim 7, it is characterised in that the step
Rapid two parameter judges to include with correction：
User judges processing medium temperature difference according to judgment module, if meets criterion, the criterion is
The processing medium temperature difference is in the range of the design bound of the processing medium temperature difference；
After judgment module judgement, confirmed to be corrected or enter step three according to judging result：
After judgment module judgement, if processing medium temperature difference does not meet criterion, it is corrected by correction module,
Processing medium temperature difference is judged again after trimming process；The trimming process includes：
When the processing medium temperature difference of heat exchanger present operating point is more than the design upper limit of processing medium temperature difference, heat exchange is reduced
Device cooling water flow is until processing medium temperature difference enters in the range of the design bound of processing medium temperature difference；
When the processing medium temperature difference of heat exchanger present operating point is less than the design lower limit of processing medium temperature difference, heat exchange is improved
Device cooling water flow is until processing medium temperature difference enters in the range of the design bound of processing medium temperature difference；
After judgment module judgement, if processing medium temperature difference meets criterion, three are entered step.
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| CN106524822B (en) * | 2016-09-28 | 2019-04-02 | 中国航空规划设计研究总院有限公司 | A kind of mixed liquid method for regulating temperature for the cooling procedure converting heat |
| CN110354630B (en) * | 2019-08-01 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Cold air volume control method and device for analysis tower in flue gas purification system |
| CN112631345A (en) * | 2019-10-08 | 2021-04-09 | 芜湖美的厨卫电器制造有限公司 | Water temperature control device and method and wall-mounted boiler |
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