CN113408831A - Water balance control method and device for open-circuit circulating water system - Google Patents

Water balance control method and device for open-circuit circulating water system Download PDF

Info

Publication number
CN113408831A
CN113408831A CN202110952356.5A CN202110952356A CN113408831A CN 113408831 A CN113408831 A CN 113408831A CN 202110952356 A CN202110952356 A CN 202110952356A CN 113408831 A CN113408831 A CN 113408831A
Authority
CN
China
Prior art keywords
water
quality
supplement
total
calculating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110952356.5A
Other languages
Chinese (zh)
Other versions
CN113408831B (en
Inventor
逯博特
高康乐
蔡怡清
王海东
李惊涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central Research Institute of Building and Construction Co Ltd MCC Group
MCC Energy Saving and Environmental Protection Co Ltd
Original Assignee
Central Research Institute of Building and Construction Co Ltd MCC Group
MCC Energy Saving and Environmental Protection Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Research Institute of Building and Construction Co Ltd MCC Group, MCC Energy Saving and Environmental Protection Co Ltd filed Critical Central Research Institute of Building and Construction Co Ltd MCC Group
Priority to CN202110952356.5A priority Critical patent/CN113408831B/en
Publication of CN113408831A publication Critical patent/CN113408831A/en
Application granted granted Critical
Publication of CN113408831B publication Critical patent/CN113408831B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06395—Quality analysis or management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Energy or water supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/152—Water filtration

Landscapes

  • Business, Economics & Management (AREA)
  • Human Resources & Organizations (AREA)
  • Engineering & Computer Science (AREA)
  • Economics (AREA)
  • Strategic Management (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Development Economics (AREA)
  • Physics & Mathematics (AREA)
  • Tourism & Hospitality (AREA)
  • Marketing (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Educational Administration (AREA)
  • Quality & Reliability (AREA)
  • Operations Research (AREA)
  • Game Theory and Decision Science (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Primary Health Care (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Physical Water Treatments (AREA)

Abstract

The invention relates to a water balance control method and device of an open-circuit circulating water system, which calculates the average concentration multiple in a certain time through the evaporation water volume accumulation amount and the water supplement volume accumulation amount, compares the average concentration multiple with the preset long-term concentration multiple, and controls the total water supplement volume according to the comparison result, so that the water system keeps the concentration multiple to operate or sets a short-term target to enable the water system to slowly approach to the expected concentration multiple, and further enable the water system to approach to the self and reach the limit. On the basis, the recommended water replenishing amount is obtained according to the water quality limit value of the circulating water and the water amount balance under different conditions of single-water-quality water replenishing and double-water-quality water replenishing so as to indicate the water replenishing control of the water system. Therefore, the water system can be maintained at the limit of the water system, and the self capacity of the water system can be exerted to a greater extent.

Description

Water balance control method and device for open-circuit circulating water system
Technical Field
The invention relates to the technical field of industrial water management, in particular to a water balance control method and device for an open-circuit circulating water system.
Background
At present, most enterprises use the management working mode of the drainage to monitor and control through the industrial control interface of each workshop/pump house, manually record and arrange and report each data parameter, the technical staff obtains the water evaluation index and the overall index of the area/whole plant after summarizing and analyzing, and the dispatching and optimization of the drainage for the whole plant are carried out according to the experience. There is a lack of uniform management and control.
Disclosure of Invention
Based on the above situation in the prior art, the present invention aims to provide a method and a device for controlling water balance of an open-loop circulating water system, which can improve the efficiency of water balance control by guiding the control of water supplement amount through the comparison of average concentration multiple and long-term concentration multiple.
To achieve the above object, according to one aspect of the present invention, there is provided a water balance control method of an open circulating water system, comprising the steps of:
calculating the average concentration multiple N of the water system in the first periodi；
Determining the average concentration factor NiWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is an adjustment coefficient;
according to the target value N of the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1；
Judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing;
if the water is single-water-quality water supplement, setting the minimum value of the concentration times corresponding to the components of the current single-water-quality water supplement as the concentration time N, and if N is the single-water-quality water supplement, setting the minimum value as the concentration time N<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2And the recommended value Q of the total water supply amountms= Qms2(ii) a If N is more than or equal to Nn，Qms= Qms1；
If the water quality is double-water-quality water supplement, calculating a first water quality water supplement amount in the respective double water qualities according to the index values of all the components of the current double-water-quality water supplement, and taking the minimum value as a first water quality water supplement amount recommended value Qmrs(ii) a At this time Qms= Qms1Recommended value Q of second water quality water supply amount in double water qualitiesmds= Qms- Qmrs。
Further, the average concentration multiple N of the water system in the first period is calculatediThe method comprises the following steps:
calculating the accumulated quantity Q of the evaporated water quantity of the water system in the first periodei；
According to the accumulated quantity Q of the evaporated water quantityeiAnd the first water quality water supplement amount accumulated quantity Q in the first periodmriSecond water quality water supplement amount accumulation QmdiCalculating the average concentration multiple N of the water system in the first periodi：
Figure 821827DEST_PATH_IMAGE001
。
Further, the accumulated quantity Q of the evaporation water quantity of the water system in the first period is calculatedeiThe method comprises the following steps:
obtaining the upper tower temperature T of the cooling tower of the water system1Lower column temperature T2And instantaneous quantity Q of circulating waterr；
Obtaining local humidity RH and local air temperature T, and obtaining an evaporation coefficient k according to the humidity RH and the air temperature T;
calculating the instantaneous evaporation water quantity Qe：
Figure 325621DEST_PATH_IMAGE002
According to the instantaneous evaporation water quantity QePerforming integral operation in a first period to obtain the accumulated quantity Q of the evaporated water quantity of the water systemei：
Figure 329087DEST_PATH_IMAGE003
Wherein, T0Is the length of the first period.
Further, the target value N is obtained according to the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1The method comprises the following steps:
Figure 892923DEST_PATH_IMAGE004
。
further, the calculating of the first water quality water replenishing amount in the respective double water quality according to the index values of the components of the current double water quality water replenishing comprises calculating according to the following formulas:
Figure 483305DEST_PATH_IMAGE005
Figure 321948DEST_PATH_IMAGE006
Figure 681385DEST_PATH_IMAGE007
wherein the content of the first and second substances,
Figure 681702DEST_PATH_IMAGE008
、
Figure 759379DEST_PATH_IMAGE009
、
Figure 372020DEST_PATH_IMAGE010
respectively taking the total hardness first water quality water supplement amount, the salt content first water quality water supplement amount and the chloride ion first water quality water supplement amount;
Figure 585963DEST_PATH_IMAGE011
、
Figure 757182DEST_PATH_IMAGE012
、
Figure 322155DEST_PATH_IMAGE013
respectively setting a total water supplementing operation total hardness limit value, a total water supplementing operation salt content limit value and a total water supplementing operation chloride ion limit value;
Figure 237022DEST_PATH_IMAGE014
、
Figure 69586DEST_PATH_IMAGE015
、
Figure 411706DEST_PATH_IMAGE016
respectively supplementing water to the current second water quality with total hardness, supplementing water to the current second water quality with salt content and supplementing water to the current second water quality with chloride ions;
Figure 463975DEST_PATH_IMAGE017
、
Figure 182533DEST_PATH_IMAGE018
、
Figure 371069DEST_PATH_IMAGE019
the total hardness of the current first water quality water supplement, the salt content of the current first water quality water supplement and the chloride ions of the current first water quality water supplement are respectively.
According to another aspect of the invention, a water balance control device of an open-circuit circulating water system is provided, which comprises an average concentration multiple calculation module, a short-term concentration multiple target value calculation module and a total water supplement recommended value calculation module; wherein the content of the first and second substances,
the average concentration multiple calculating module is used for calculating the waterAverage concentration multiple N of system in first periodi；
The short-term concentration multiple target value calculating module is used for calculating a short-term concentration multiple target value Nn: determining the average concentration factor NiWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is an adjustment coefficient;
the total water supplement suggested value calculation module is used for calculating the total water supplement: according to the target value N of the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1(ii) a Judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing; if the water is single-water-quality water supplement, setting the minimum value of the concentration times corresponding to the components of the current single-water-quality water supplement as the concentration time N, and if N is the single-water-quality water supplement, setting the minimum value as the concentration time N<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2And the recommended value Q of the total water supply amountms= Qms2(ii) a If N is more than or equal to Nn，Qms= Qms1(ii) a If the water quality is double-water-quality water supplement, calculating a first water quality water supplement amount in the respective double water qualities according to the index values of all the components of the current double-water-quality water supplement, and taking the minimum value as a first water quality water supplement amount recommended value Qmrs(ii) a At this time Qms= Qms1Second water quality water supply recommended value Qmds= Qms- Qmrs。
Further, the short-term concentration multiple target value calculation module calculates the average concentration multiple N of the water system in the first periodiThe method comprises the following steps:
calculating the accumulated quantity Q of the evaporated water quantity of the water system in the first periodei；
According to the accumulated quantity Q of the evaporated water quantityeiAnd the second water quality water supplement amount accumulated quantity Q in the first periodmdiFirst water quality water supplement amount accumulation QmriCalculating the average concentration multiple N of the water system in the first periodi：
Figure 149669DEST_PATH_IMAGE020
。
Further, the short-term concentration multiple target value calculation module calculates the accumulated quantity Q of the evaporation water quantity of the water system in the first periodeiThe method comprises the following steps:
obtaining the upper tower temperature T of the cooling tower of the water system1Lower column temperature T2And instantaneous quantity Q of circulating waterr；
Obtaining local humidity RH and local air temperature T, and obtaining an evaporation coefficient k according to the humidity RH and the air temperature T;
calculating the instantaneous evaporation water quantity Qe：
Figure 689235DEST_PATH_IMAGE021
According to the instantaneous evaporation water quantity QePerforming integral operation in a first period to obtain the accumulated quantity Q of the evaporated water quantity of the water systemei：
Figure 447368DEST_PATH_IMAGE022
Wherein, T0Is the length of the first period.
Further, the total water supplement recommended value calculation module calculates the total water supplement recommended value according to a short-term concentration multiple target value NnCalculating a first total water supplement recommended value Qms1The method comprises the following steps:
Figure 755990DEST_PATH_IMAGE023
。
further, the total water supplement recommended value calculation module calculates a first water quality water supplement amount in each double water quality according to the index values of the components of the current double water quality, and the calculation comprises the following calculation according to the following formulas:
Figure 705491DEST_PATH_IMAGE005
Figure 466774DEST_PATH_IMAGE006
Figure 527134DEST_PATH_IMAGE007
wherein the content of the first and second substances,
Figure 690262DEST_PATH_IMAGE008
、
Figure 545086DEST_PATH_IMAGE009
、
Figure 557779DEST_PATH_IMAGE010
respectively taking the total hardness first water quality water supplement amount, the salt content first water quality water supplement amount and the chloride ion first water quality water supplement amount;
Figure 421829DEST_PATH_IMAGE011
、
Figure 439464DEST_PATH_IMAGE012
、
Figure 996347DEST_PATH_IMAGE013
respectively setting a total water supplementing operation total hardness limit value, a total water supplementing operation salt content limit value and a total water supplementing operation chloride ion limit value;
Figure 732222DEST_PATH_IMAGE014
、
Figure 399964DEST_PATH_IMAGE015
、
Figure 6526DEST_PATH_IMAGE016
respectively supplementing water to the current second water quality with total hardness, supplementing water to the current second water quality with salt content and supplementing water to the current second water quality with chloride ions;
Figure 235775DEST_PATH_IMAGE017
、
Figure 458946DEST_PATH_IMAGE018
、
Figure 664799DEST_PATH_IMAGE019
the total hardness of the current first water quality water supplement, the salt content of the current first water quality water supplement and the chloride ions of the current first water quality water supplement are respectively.
In summary, the present invention provides a method and a device for controlling water balance of an open-loop circulating water system, which calculate an average concentration multiple within a certain time by an evaporation water amount accumulation amount and a water supplement amount accumulation amount, compare the average concentration multiple with a preset long-term concentration multiple, and control a total water supplement amount according to a comparison result, so that the water system keeps running at the concentration multiple or sets a short-term target to allow the water system to slowly approach to an expected concentration multiple, so that the water system further approaches to a limit. On the basis, the recommended water replenishing amount is obtained according to the water quality limit value of the circulating water and the water amount balance under different conditions of single-water-quality water replenishing and double-water-quality water replenishing so as to indicate the water replenishing control of the water system. Therefore, the water system can be maintained at the limit of the water system, and the self capacity of the water system can be exerted to a greater extent.
Drawings
FIG. 1 is a flow chart of a method for controlling the amount of water supply to an open-circuit circulating water system according to the present invention;
FIG. 2 is a block diagram showing the constitution of a water replenishment amount control device for an open-circuit circulating water system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to a first embodiment of the present invention, there is provided a water balance control method for an open circulating water system, the method having a flow chart as shown in fig. 1, comprising the steps of:
step 1, calculating the average concentration multiple N of the water system in a first periodiThe first period may be, for example, the last week, a month, or a time range of other length, which may be set according to actual needs. Specifically, the following steps can be performed:
step 11, calculating the accumulated quantity Q of the evaporation water quantity of the water system in the first periodei. The reliability of calculating the concentration multiple by adopting the evaporation water amount is higher, the average concentration multiple in a period of time of a circulating water system is considered to be calculated, and if the water displacement, the water supplement amount and the wind loss water amount are used for calculation, the huge error when the water system is crossed or leaked in a large amount cannot be solved. And the concentration times are calculated by using the water supplement amount and the evaporation water amount, and the calculation of the water supplement amount and the evaporation water amount is accurate, so that a more reliable result can be obtained.
The accumulated quantity Q of the evaporated watereiCan be calculated according to the following steps:
obtaining the upper tower temperature T of the cooling tower of the water system1Lower column temperature T2And instantaneous quantity Q of circulating waterr；
And acquiring local humidity RH and local air temperature T, and obtaining an evaporation coefficient k according to the humidity RH and the air temperature T, wherein the evaporation coefficient k can be inquired according to a humidity-air temperature table.
Calculating the instantaneous evaporation water quantity Qe：
Figure 657026DEST_PATH_IMAGE021
Calculation frequency Q of instantaneous evaporation water volumeeUsually with the instantaneous quantity Q of the circulating waterrThe sampling frequency of (a) is the same and real-time data is acquired in time.
According to the instantaneous evaporation water quantity QePerforming integral operation in a first period to obtain the evaporated water of the water systemQuantity accumulated quantity Qei：
Figure 290133DEST_PATH_IMAGE022
Wherein, T0Is the length of the first period.
Step 12, accumulating quantity Q according to the evaporation water quantityeiAnd the second water quality water supplement amount accumulated quantity Q in the first periodmdiFirst water quality water supplement amount accumulation QmriCalculating the average concentration multiple N of the water system in the first periodi：
Figure 735021DEST_PATH_IMAGE020
。
The water replenishing of the water system comprises various water replenishing qualities, such as first-level desalted water, recycled water replenishing and the like. When calculating the average concentration multiple, two main characteristic water qualities are calculated, and the calculated average concentration multiple is set as a first water quality and a second water quality step 2, and the average concentration multiple N is judgediWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is the adjustment coefficient.
Calculating average concentration multiple N in the first period according to the accumulated amount of evaporated water and the accumulated amount of water supplementiAnd mixing it with the long-term concentration multiple N set in advanceaBy comparison, if Ni≥NaIf the water system operation reaches or exceeds the expected capacity, the current task is to maintain the concentration factor operation and replace the original long-term concentration factor target value N with the current actual concentration factoraTo allow the system to further approach its own reach limit. If N is presenti<NaSetting a short term target N, indicating that the system has not yet reached the desired targetn=Ni+(Na-Ni) R, let the water system slowThe desired concentration factor is approached, wherein the adjustment factor may be, for example, 0.1. The technical scheme has the advantage that N is usedaThe water supply system is artificially set, the actual water system can not reach, but under the setting, when the water system reaches the actual limit which can be reached by the water system, the recommended value of the water supply amount is given, the water system is always poor and cannot be actually reached, but the water system can be maintained at the limit, so that the self capacity of the water system is exerted to a greater extent.
Step 3, according to the short-term concentration multiple target value NnCalculating a first total water supplement recommended value Qms1：
Figure 478986DEST_PATH_IMAGE023
。
Step 4, judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing, wherein generally speaking, the single-water-quality water replenishing can be recycled water replenishing, primary desalted water replenishing or other water quality water replenishing; the double-water-quality water replenishing can be recycled water replenishing and primary desalted water replenishing or combined water replenishing of other two water qualities. For a circulating water system for supplementing water with single water quality, whether the water quality meets the limit value requirement needs to be checked, and if the water quality does not meet the limit value requirement, the water supplementing quantity is given according to the concentration multiple obtained by the water quality; for a water system for mixing two water qualities for water supplement, the water supplement proportion is required to be obtained through water quality and water quantity balance.
And if the water is single-water-quality water replenishing, setting the minimum value in the concentration times corresponding to all the components of the current single-water-quality water replenishing as the concentration time N, and marking the water-quality saturation of the water replenishing which the maximum value source is. Wherein, the concentration multiple corresponding to each component of the current single-water-quality water supplement can be calculated according to the following formula:
Figure 89833DEST_PATH_IMAGE024
Figure 893841DEST_PATH_IMAGE025
Figure 91605DEST_PATH_IMAGE026
wherein the content of the first and second substances,
Figure 373681DEST_PATH_IMAGE027
in order to obtain a concentration factor for the total hardness,
Figure 340500DEST_PATH_IMAGE028
is the concentration coefficient of the salt content,
Figure 315410DEST_PATH_IMAGE029
the concentration coefficient of the chloride ions is shown as,
Figure 469DEST_PATH_IMAGE030
the total hardness of the current water supplement is,
Figure 599420DEST_PATH_IMAGE031
the salt content of the current water supplement is,
Figure 420746DEST_PATH_IMAGE032
for the content of the chloride ions which are supplemented with water at present,
Figure 832135DEST_PATH_IMAGE033
for the total hardness limit of the circulating water run,
Figure 738911DEST_PATH_IMAGE034
for the circulating water to run the salt content limit,
Figure 362791DEST_PATH_IMAGE035
for the circulating water operating chloride limit, m is a first limit factor, which may be set to 0.9, for example. The highest achievable concentration factor is calculated in this way by maintaining the operating water quality of the circulating water at, for example, 90% of the limit value for the water quality of the circulating water.
If N is present<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2The calculation method is the same and Qms2Same, wherein NnReplacing the N with N; at this time, the recommended value Q of the total water supplement amountms= Qms2；
If N is more than or equal to Nn，Qms= Qms1。
If the water is double-water-quality water supplement, calculating the first water-quality water supplement amount according to the index values of the components of the current double-water-quality water supplement, and calculating according to the following formulas:
solving according to the total hardness water quantity and water quality balance to obtain:
Figure 304202DEST_PATH_IMAGE005
and solving according to the water quality balance of the salt content water quantity to obtain:
Figure 620914DEST_PATH_IMAGE006
solving according to the water quantity and water quality balance of the chloride ions to obtain:
Figure 247942DEST_PATH_IMAGE007
wherein the content of the first and second substances,
Figure 941092DEST_PATH_IMAGE008
、
Figure 737009DEST_PATH_IMAGE009
、
Figure 490202DEST_PATH_IMAGE010
respectively taking the total hardness first water quality water supplement amount, the salt content first water quality water supplement amount and the chloride ion first water quality water supplement amount;
Figure 371570DEST_PATH_IMAGE011
、
Figure 337252DEST_PATH_IMAGE012
、
Figure 987676DEST_PATH_IMAGE013
respectively setting a total water supplementing operation total hardness limit value, a total water supplementing operation salt content limit value and a total water supplementing operation chloride ion limit value;
Figure 911770DEST_PATH_IMAGE014
、
Figure 516320DEST_PATH_IMAGE015
、
Figure 285693DEST_PATH_IMAGE016
respectively supplementing water to the current second water quality with total hardness, supplementing water to the current second water quality with salt content and supplementing water to the current second water quality with chloride ions;
Figure 790623DEST_PATH_IMAGE017
、
Figure 885618DEST_PATH_IMAGE018
、
Figure 741579DEST_PATH_IMAGE019
respectively supplementing water to the current first water quality with total hardness, supplementing water to the current first water quality with salt content and supplementing water to the current first water quality with chloride ions;
comparing the first water quality water replenishing quantities, and taking the minimum value as a first water quality water replenishing quantity recommended value Qmrs(ii) a At this time Qms= Qms1Second water quality water supply recommended value Qmds= Qms- Qmrs。
Wherein, it is also necessary to use NnAnd each circulating water operation limit index including a circulating water operation total hardness limit
Figure 49063DEST_PATH_IMAGE033
Circulating water operating salt content limit
Figure 172615DEST_PATH_IMAGE034
Circulating water operating chloride limit
Figure 438511DEST_PATH_IMAGE035
Calculated at a concentration factor of NnUnder the condition of (1), the highest allowable water replenishing water quality limit value and the total water replenishing operation total hardness limit value THms、Dms、Clms：
Figure 516189DEST_PATH_IMAGE036
Figure 158523DEST_PATH_IMAGE037
Figure 638045DEST_PATH_IMAGE038
Where n is the second limit coefficient, and may be set to 0.9, for example. Based on the existing limit, e.g. 90% (the circulating water controls the operating water quality to 90% of the limit, so it is multiplied by 90%), and the calculated short-term concentration factor target NnAnd calculating the highest water quality allowed by water supplement according to a method for calculating the concentration multiple of the water quality, wherein the highest allowable value of the water quality after two water supplement hypotheses are mixed is obtained by calculation at the moment because two water supplements are actually used.
Under the two water quality moisturizing circumstances, two strands of moisturizing water quantums add and equal to total moisturizing volume, according to the water balance: qmds + Qmrs= Qms
Mixing the water qualities of the two water replenishing processes to obtain the mixed water quality of the total water replenishing, namely the total water replenishing operation chloride ion limit Cl obtained in the abovems. According to the water quality balance of chloride ions:
Qmds * Clm1 + Qmrs * Clm2 = Qms* Clms
q can be obtained by simultaneous solvingmds、QmrsThe respective values. In the same way, the simultaneous equation of other two water quality indexes and water quantity can be obtained. Comparing the three, get QmdThe maximum solution. Get QmdThe biggest reason is that the other two must beBut does not satisfy the maximum QmdThe water quality limit corresponding to this water quality, i.e. Q among the three valuesmdCan meet the limit requirements of the three water qualities.
According to another embodiment of the present invention, a water balance control device for an open-circuit circulating water system is provided, which is configured as shown in fig. 2, and includes an average concentration multiple calculation module, a short-term concentration multiple target value calculation module, and a total water supplement recommended value calculation module.
The average concentration multiple calculation module is used for calculating the average concentration multiple N of the water system in a first periodi。
The short-term concentration multiple target value calculating module is used for calculating a short-term concentration multiple target value Nn: determining the average concentration factor NiWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is the adjustment coefficient.
The total water supplement suggested value calculation module is used for calculating the total water supplement: according to the target value N of the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1(ii) a Judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing; if the water is single-water-quality water supplement, setting the minimum value of the concentration times corresponding to the components of the current single-water-quality water supplement as the concentration time N, and if N is the single-water-quality water supplement, setting the minimum value as the concentration time N<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2And the recommended value Q of the total water supply amountms= Qms2(ii) a If N is more than or equal to Nn，Qms= Qms1(ii) a If the water quality is double water quality water supply, calculating respective first water quality water supply amount according to the index values of all the components of the current double water quality water supply, and taking the minimum value as a first water quality water supply amount recommended value Qmrs(ii) a At this time Qms= Qms1Second water quality water supply recommended value Qmds= Qms- Qmrs。
The specific calculation steps adopted in each calculation module are the same as those described in the above first embodiment of the present invention, and are not described herein again.
In summary, the present invention relates to a method and a device for controlling water balance of an open-loop circulating water system, which calculate an average concentration multiple within a certain time by an evaporation water amount accumulation amount and a water supplement amount accumulation amount, compare the average concentration multiple with a preset long-term concentration multiple, and control a total water supplement amount according to a comparison result, so that the water system keeps running at the concentration multiple or sets a short-term target to allow the water system to slowly approach to an expected concentration multiple, so that the water system further approaches to a limit. On the basis, the recommended water replenishing amount is obtained according to the water quality limit value of the circulating water and the water amount balance under different conditions of single-water-quality water replenishing and double-water-quality water replenishing so as to indicate the water replenishing control of the water system. Therefore, the water system can be maintained at the limit of the water system, and the self capacity of the water system can be exerted to a greater extent.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A water balance control method of an open-circuit circulating water system is characterized by comprising the following steps:
calculating the average concentration multiple N of the water system in the first periodi；
Determining the average concentration factor NiWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is an adjustment coefficient;
according to the target value N of the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1；
Judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing;
if the water is single-water-quality water supplement, setting the minimum value of the concentration times corresponding to the components of the current single-water-quality water supplement as the concentration time N, and if N is the single-water-quality water supplement, setting the minimum value as the concentration time N<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2And the recommended value Q of the total water supply amountms= Qms2(ii) a If N is more than or equal to Nn，Qms= Qms1；
If the water quality is double-water-quality water supplement, calculating a first water quality water supplement amount in the respective double water qualities according to the index values of all the components of the current double-water-quality water supplement, and taking the minimum value as a first water quality water supplement amount recommended value Qmrs(ii) a At this time Qms= Qms1Recommended value Q of second water quality water supply amount in double water qualitiesmds= Qms- Qmrs。
2. The method of claim 1, wherein the average concentration factor N of the water system over the first period is calculatediThe method comprises the following steps:
calculating the accumulated quantity Q of the evaporated water quantity of the water system in the first periodei；
According to the accumulated quantity Q of the evaporated water quantityeiAnd the first water quality water supplement amount accumulated quantity Q in the first periodmriSecond water quality water supplement amount accumulation QmdiCalculating the average concentration multiple N of the water system in the first periodi：
Figure 906201DEST_PATH_IMAGE001
。
3. Method according to claim 2, characterized in that said calculation of the accumulated quantity Q of evaporated water of the water system during the first periodeiThe method comprises the following steps:
obtain the cooling tower of the water systemUpper column temperature T1Lower column temperature T2And instantaneous quantity Q of circulating waterr；
Obtaining local humidity RH and local air temperature T, and obtaining an evaporation coefficient k according to the humidity RH and the air temperature T;
calculating the instantaneous evaporation water quantity Qe：
Figure 292183DEST_PATH_IMAGE002
According to the instantaneous evaporation water quantity QePerforming integral operation in a first period to obtain the accumulated quantity Q of the evaporated water quantity of the water systemei：
Figure 540761DEST_PATH_IMAGE003
Wherein, T0Is the length of the first period.
4. The method of claim 3, wherein the target value N is based on a short term concentration factornCalculating a first total water supplement recommended value Qms1The method comprises the following steps:
Figure 640698DEST_PATH_IMAGE004
。
5. the method of claim 1, wherein the calculating the first water quality water supply amount in each dual water quality according to the index values of the components of the current dual water quality water supply comprises calculating according to the following formulas:
Figure 658332DEST_PATH_IMAGE005
Figure 949636DEST_PATH_IMAGE006
Figure 419932DEST_PATH_IMAGE007
wherein the content of the first and second substances,
Figure 87674DEST_PATH_IMAGE008
、
Figure 225394DEST_PATH_IMAGE009
、
Figure 422020DEST_PATH_IMAGE010
respectively taking the total hardness first water quality water supplement amount, the salt content first water quality water supplement amount and the chloride ion first water quality water supplement amount;
Figure 143726DEST_PATH_IMAGE011
、
Figure 349580DEST_PATH_IMAGE012
、
Figure 76227DEST_PATH_IMAGE013
respectively setting a total water supplementing operation total hardness limit value, a total water supplementing operation salt content limit value and a total water supplementing operation chloride ion limit value;
Figure 974913DEST_PATH_IMAGE014
、
Figure 685380DEST_PATH_IMAGE015
、
Figure 163766DEST_PATH_IMAGE016
respectively supplementing water to the current second water quality with total hardness, supplementing water to the current second water quality with salt content and supplementing water to the current second water quality with chloride ions;
Figure 276078DEST_PATH_IMAGE017
、
Figure 569832DEST_PATH_IMAGE018
、
Figure 767596DEST_PATH_IMAGE019
the total hardness of the current first water quality water supplement, the salt content of the current first water quality water supplement and the chloride ions of the current first water quality water supplement are respectively.
6. The water balance control device of the open-circuit circulating water system is characterized by comprising an average concentration multiple calculation module, a short-term concentration multiple target value calculation module and a total water supplement recommended value calculation module; wherein the content of the first and second substances,
the average concentration multiple calculation module is used for calculating the average concentration multiple N of the water system in a first periodi；
The short-term concentration multiple target value calculating module is used for calculating a short-term concentration multiple target value Nn: determining the average concentration factor NiWhether or not to be greater than or equal to the target value N of the long-term concentration multipleaIf N is presenti≥NaThen, the short-term concentration multiple target value Nn=Ni(ii) a If N is presenti<NaThen N isn=Ni+(Na-Ni) R, r is an adjustment coefficient;
the total water supplement suggested value calculation module is used for calculating the total water supplement: according to the target value N of the short-term concentration multiplenCalculating a first total water supplement recommended value Qms1(ii) a Judging whether the water system is single-water-quality water replenishing or double-water-quality water replenishing; if the water is single-water-quality water supplement, setting the minimum value of the concentration times corresponding to the components of the current single-water-quality water supplement as the concentration time N, and if N is the single-water-quality water supplement, setting the minimum value as the concentration time N<NnCalculating a second total water supplement recommended value Q according to the concentration multiple Nms2And the recommended value Q of the total water supply amountms= Qms2(ii) a If N is more than or equal to Nn，Qms= Qms1(ii) a If the water is double-water-quality water replenishing, calculating the index values of all the components according to the current double-water-quality water replenishingThe first water quality water supplement amount in the double water qualities is taken as a first water quality water supplement amount suggested value Qmrs(ii) a At this time Qms= Qms1Second water quality water supply recommended value Qmds= Qms- Qmrs。
7. The apparatus of claim 6, wherein the short term concentration factor target calculation module calculates an average concentration factor N of the water system during the first periodiThe method comprises the following steps:
calculating the accumulated quantity Q of the evaporated water quantity of the water system in the first periodei；
According to the accumulated quantity Q of the evaporated water quantityeiAnd the second water quality water supplement amount accumulated quantity Q in the first periodmdiFirst water quality water supplement amount accumulation QmriCalculating the average concentration multiple N of the water system in the first periodi：
Figure 49672DEST_PATH_IMAGE020
。
8. The apparatus of claim 7, wherein the short term concentration multiple target value calculation module calculates an accumulated quantity Q of evaporated water in the water system during the first periodeiThe method comprises the following steps:
obtaining the upper tower temperature T of the cooling tower of the water system1Lower column temperature T2And instantaneous quantity Q of circulating waterr；
Obtaining local humidity RH and local air temperature T, and obtaining an evaporation coefficient k according to the humidity RH and the air temperature T;
calculating the instantaneous evaporation water quantity Qe：
Figure 16491DEST_PATH_IMAGE021
According to the instantaneous evaporation water quantity QePerforming an integration operation in a first period to obtainThe accumulated quantity Q of the evaporation water of the water systemei：
Figure 256980DEST_PATH_IMAGE022
Wherein, T0Is the length of the first period.
9. The apparatus of claim 8, wherein the total water supplement recommended value calculation module calculates the total water supplement recommended value according to a short term concentration factor target value NnCalculating a first total water supplement recommended value Qms1The method comprises the following steps:
Figure 410881DEST_PATH_IMAGE023
。
10. the apparatus of claim 9, wherein the total recommended water replenishment quantity calculation module calculates a first water quality replenishment quantity in each of the dual water qualities according to the index values of the components of the current dual water qualities, and includes the following formulas:
Figure 762228DEST_PATH_IMAGE024
Figure 816509DEST_PATH_IMAGE025
Figure 227899DEST_PATH_IMAGE026
wherein the content of the first and second substances,
Figure 134675DEST_PATH_IMAGE027
、
Figure 24133DEST_PATH_IMAGE028
、
Figure 965545DEST_PATH_IMAGE029
respectively taking the total hardness first water quality water supplement amount, the salt content first water quality water supplement amount and the chloride ion first water quality water supplement amount;
Figure 282256DEST_PATH_IMAGE030
、
Figure 676329DEST_PATH_IMAGE031
、
Figure 870943DEST_PATH_IMAGE032
respectively setting a total water supplementing operation total hardness limit value, a total water supplementing operation salt content limit value and a total water supplementing operation chloride ion limit value;
Figure 401282DEST_PATH_IMAGE033
、
Figure 154474DEST_PATH_IMAGE034
、
Figure 35842DEST_PATH_IMAGE035
respectively supplementing water to the current second water quality with total hardness, supplementing water to the current second water quality with salt content and supplementing water to the current second water quality with chloride ions;
Figure 267103DEST_PATH_IMAGE036
、
Figure 917528DEST_PATH_IMAGE037
、
Figure 576042DEST_PATH_IMAGE038
the total hardness of the current first water quality water supplement, the salt content of the current first water quality water supplement and the chloride ions of the current first water quality water supplement are respectively.
CN202110952356.5A 2021-08-19 2021-08-19 Water balance control method and device for open-circuit circulating water system Active CN113408831B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110952356.5A CN113408831B (en) 2021-08-19 2021-08-19 Water balance control method and device for open-circuit circulating water system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110952356.5A CN113408831B (en) 2021-08-19 2021-08-19 Water balance control method and device for open-circuit circulating water system

Publications (2)

Publication Number Publication Date
CN113408831A true CN113408831A (en) 2021-09-17
CN113408831B CN113408831B (en) 2021-11-19

Family

ID=77688773

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110952356.5A Active CN113408831B (en) 2021-08-19 2021-08-19 Water balance control method and device for open-circuit circulating water system

Country Status (1)

Country Link
CN (1) CN113408831B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114236068A (en) * 2021-11-24 2022-03-25 中冶赛迪重庆信息技术有限公司 Chloride ion concentration analysis method and system based on circulating water system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101071053A (en) * 2007-03-26 2007-11-14 任广兴 Open industrial circulating-cooling water concentrating ratio and drug concentration balance control method
CN102004458A (en) * 2010-11-18 2011-04-06 金红玲 Circulating water quality control system
WO2019132054A1 (en) * 2017-12-26 2019-07-04 벽산파워 주식회사 Peak demand control system using energy storage device
CN112086138A (en) * 2020-08-13 2020-12-15 华能碳资产经营有限公司 Method and device for calculating concentration multiple of circulating cooling water under water replenishing quality fluctuation working condition
CN112484560A (en) * 2020-10-20 2021-03-12 浙江中控技术股份有限公司 Water-saving optimization method and system for industrial circulating water

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101071053A (en) * 2007-03-26 2007-11-14 任广兴 Open industrial circulating-cooling water concentrating ratio and drug concentration balance control method
CN102004458A (en) * 2010-11-18 2011-04-06 金红玲 Circulating water quality control system
WO2019132054A1 (en) * 2017-12-26 2019-07-04 벽산파워 주식회사 Peak demand control system using energy storage device
CN112086138A (en) * 2020-08-13 2020-12-15 华能碳资产经营有限公司 Method and device for calculating concentration multiple of circulating cooling water under water replenishing quality fluctuation working condition
CN112484560A (en) * 2020-10-20 2021-03-12 浙江中控技术股份有限公司 Water-saving optimization method and system for industrial circulating water

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
JIN LIU等: "Research on the control of adding acid to circulating water based on expert fuzzy PID control", 《2016 CHINESE CONTROL AND DECISION CONFERENCE (CCDC)》 *
叶晓林: "复杂补水循环水系统浓缩倍数的计算", 《石油化工腐蚀与防护》 *
高康乐 等: "水处理专家系统在钢铁企业循环水系统中的应用", 《环境工程》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114236068A (en) * 2021-11-24 2022-03-25 中冶赛迪重庆信息技术有限公司 Chloride ion concentration analysis method and system based on circulating water system
CN114236068B (en) * 2021-11-24 2024-03-01 中冶赛迪信息技术(重庆)有限公司 Chloride ion concentration analysis method and system based on circulating water system

Also Published As

Publication number Publication date
CN113408831B (en) 2021-11-19

Similar Documents

Publication Publication Date Title
US10175709B2 (en) Consumer electric power control system and consumer electric power control method
Vrettos et al. Scheduling and provision of secondary frequency reserves by aggregations of commercial buildings
CN110513767B (en) Heat supply network hydraulic balance regulation and control method and system based on resistance characteristics of heating power station
CN104915562B (en) Build efficiency diagnostic method and system
CN113408831B (en) Water balance control method and device for open-circuit circulating water system
CN107342588B (en) Power grid frequency self-adaptive emergency control method considering power transmission section quota
CN110925854B (en) Flow regulation method and system for improving hydraulic imbalance of secondary heat supply network
CN105978041A (en) Active power control method for wind power station configured with marker post draught fans
CN111047117B (en) Differential pressure bypass valve energy-saving optimization method based on terminal load prediction
CN115439003A (en) Gas meter replacement prompting method and system based on intelligent gas Internet of things
DE102018115520A1 (en) DETECTION OF UNEMPLOYED FUEL AND REMEDIAL MEASURES
JP2006250443A (en) Operation control method in one pump-type heat source equipment
CN113587207B (en) Heating control method and device and computer equipment
CN104456827B (en) Information processing device and information processing method
CN112926797A (en) Public building power demand response double optimization method based on response priority
CN111692681A (en) Digital air-conditioning water system and evaluation method
CN112413716A (en) Valve adjusting method and system based on artificial intelligence Internet of things
CN107461881A (en) The refrigeration host computer efficiency diagnostic method and its system of a kind of hospital&#39;s Air Conditioning Facilities
CN114543303B (en) Operation optimization method and system for central air-conditioning refrigeration station based on operation big data
CN105240993A (en) Fine energy-saving control system of central air conditioner and achieving method of fine energy-saving control system
CN111787764B (en) Energy consumption optimization method and device for multi-split refrigerating unit, electronic equipment and storage medium
CN115451533A (en) System and method for calculating and analyzing energy efficiency of centralized air-conditioning refrigeration machine room system
Jiang et al. General methodology combining engineering optimization of primary hvac&r plants with decision analysis methods—part II: Uncertainty and decision analysis
CN112083704A (en) Chemical plant control loop performance quantitative evaluation method and machine readable storage medium
CN104578175A (en) AGC control method for power grid standby adjustment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant