CN101943919B - Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier - Google Patents
Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier Download PDFInfo
- Publication number
- CN101943919B CN101943919B CN2010102271758A CN201010227175A CN101943919B CN 101943919 B CN101943919 B CN 101943919B CN 2010102271758 A CN2010102271758 A CN 2010102271758A CN 201010227175 A CN201010227175 A CN 201010227175A CN 101943919 B CN101943919 B CN 101943919B
- Authority
- CN
- China
- Prior art keywords
- concentration
- cooling water
- water
- cycles
- fluorescent tracer
- 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.)
- Active
Links
Images
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a method for controlling concentration multiplying power of circulating cooling water, which controls the concentration multiplying power of the circulating water according to the concentration change of a fluorescent tracer. The method comprises the following steps of: adding 0.01 to 1ppm fluorescent tracer into supplementing water of the circulating cooling water; measuring the concentration of the fluorescent tracer in the supplementing water of the circulating cooling water on line by using a first fluorescent meter, and automatically adjusting a dosing pump through a concentration multiplier controller to ensure that the fluorescent tracer added into the supplementing water of the circulating cooling water meets the requirement; measuring the concentration of the fluorescent tracer in the supplementing water of the circulating cooling water on line by using a second fluorescent meter; and obtaining the concentration multiplying power of the circulating water of the current state, namely the ratio of the concentration of the fluorescent tracer in the circulating cooling water to the concentration of the fluorescent tracer in the supplementing water of the circulating cooling water. A cooling water drainage electric valve is controlled by using the concentration multiplier controller; and when the concentration multiplying power of the circulating water reaches a set value, the drainage electric valve runs, and the cooling water is discharged. The control method can directly, accurately and quickly measure and control the concentration multiplying power of the circulating water on line.
Description
Technical field
The present invention relates to a kind of system that is used for Control Circulation chilled water cycles of concentration, relate in particular to a kind of system that comes Control Circulation chilled water cycles of concentration by the multiple of measuring the increase of fluorescent tracing agent concentration.
Background technology
Concentration rate of circulating cooling water refers to the content of certain material in chilled water and the ratio of content in moisturizing, also can be expressed as the ratio of cooling water replenishment total amount and total amount of pollutants discharged (comprise blowdown, leakage is splashed etc.).
Recirculating cooling water system is in operation, by the evaporation section chilled water to reach the purpose of cooling.Because evaporation is pure water, the mineral matter that contains in the chilled water that is evaporated continues to stay in the chilled water, and this causes chilled water mineral concentration constantly to raise.When the concentration of chilled water mineral reaches certain proportion, must the discharge unit chilled water avoiding fouling, burn into deposition and microorganism a series of problems such as multiply.The amount decision cycles of concentration of discharging chilled water, the amount of discharging greatly then cycles of concentration is low, otherwise, the little then cycles of concentration of the amount height of discharging chilled water.
In China's process water 70～80% is the recirculated cooling water moisturizing, the National Standard Code for design of industrial recirculating cooling water treatment " the recirculated water cycles of concentration is brought up to 5 times from average 3 times (nineteen ninety-five standards) among the GB50050-2007, its water-saving result can improve 0.4 percentage point, in water consumption in 2004,17,600,000,000 tons of water can be saved in the whole nation.In addition, the indirect benefit that also has is to reduce water source scale and water distributing network, reduces the water treatment agent amount, reduces kinetic energy consumption etc.Therefore, accurately, fast, online the recirculated water cycles of concentration being controlled in the reasonable range is to realize water-saving and emission-reducing, one of important step in the protection environment.
At present, Control Circulation cooling water system cycles of concentration mainly contains following method:
(1) fluid level controller: mainly enter the rate of water make-up of cooling water system and the water of outflow system is that blowdown flow rate is finished by control.The method is the control system rate of water make-up accurately, and as using fluid level controller in chilled water cistern or tower basin, when water level is lower than the fluid level controller setting value, water compensating valve just brings into operation.But be difficult to the control system blowdown flow rate, particularly occur leaking when system, overflow or when splashing, blowdown flow rate is uncontrollable just, cycles of concentration is just uncontrollable.
(2) conductivity meter: using conductivity control blowdown is the typical method of control cycles of concentration.Its principle is, owing to have ionic species in the water, makes glassware for drinking water that electric conductivity be arranged, and its electrical conductivity can be measured, is conductivity.When the increase of chilled water intermediate ion concentration, its conductivity also increases, and the multiple of its increase is approximately equal to the chilled water cycles of concentration.So can set a fixedly conductivity value, when the chilled water conductivity reaches this fixed value, begin blowdown.When using conductivity meter control cycles of concentration, when system water supplement changes, perhaps chilled water uses a plurality of moisturizings water source, and conductivity meter just can not accurately be controlled cycles of concentration.If in water treatment, add chemicals such as acid, germifuge etc., the remarkable rising chilled water conductivity of meeting causes blowdown flow rate to increase, and cycles of concentration reduces; Thereby cause chilled water to cross circulation if problems such as system's generation fouling can reduce the chilled water conductivity, will cause water treatment " heavy failure ".
(3) timer: use time of timer control system blowdown and any specific material in the not actual measurement water.Timer can only be similar to by the control blowdown flow rate and control cycles of concentration, but when the variation of cooling water system evaporation capacity, environment temperature, humidity change, and cycles of concentration will be changed.
It is directly to measure cycles of concentration accurately, online that the method for above-mentioned several Control Circulation cooling water system cycles of concentration all exists a critical technical problems, and according to this cycles of concentration control blowdown.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of method that is used for Control Circulation chilled water cycles of concentration, this control method can be measured the cycles of concentration of Control Circulation water directly, accurately, fast, online.
In order to solve the problems of the technologies described above, the present invention is used for the technical scheme that the method for Control Circulation chilled water cycles of concentration is achieved and is: come Control Circulation water cycles of concentration according to the fluorescent tracer concentration change, its step is as follows:
The present invention is used for the concentration rate instrument of recirculating cooling water system, comprising: one is used for the chemicals dosing plant to recirculated cooling water fluorescent tracer that moisturizing adds; One is used for first photofluorometer of on-line measurement recirculated cooling water moisturizing fluorescent tracing agent concentration; One is used for second photofluorometer of on-line measurement recirculated cooling water fluorescent tracing agent concentration; One is used for the concentration rate instrument controller of computation cycles chilled water cycles of concentration, includes at least in the described concentration rate instrument controller: the PID computing module that is used for on-line automatic control chemicals dosing plant; Two analog quantity load modules that receive above-mentioned two photofluorometer data respectively; Be used to control the switching value output module of blowdown apparatus operation.
Compared with prior art, the invention has the beneficial effects as follows:
Control system of the present invention is to come Control Circulation water cycles of concentration according to the variation of adding fluorescent tracing agent concentration in the recirculated cooling water moisturizing to, be provided with two online concentration that record fluorescent tracer in moisturizing and the recirculated water of photofluorometer, and adopt concentration rate instrument controller to compare, can measure the cycles of concentration of recirculated cooling water directly, accurately, online, and according to this cycles of concentration control blowdown.
Description of drawings
Fig. 1 is the artwork that the present invention is used for Control Circulation chilled water cycles of concentration;
Fig. 2 is the recirculating cooling water system cycles of concentration control block diagram that has concentration rate instrument of the present invention.
Among the figure: 1. fluorescent tracer, 2. dosing pump, 3. water charging system, 4. first photofluorometer, 5. second photofluorometer, 6. concentration rate instrument controller, 7. process heat exchange system, 8. blowdown apparatus, 9. ebullator, 10 cooling towers.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
As shown in Figure 1, the present invention's concentration rate instrument of being used for recirculating cooling water system comprises: one is used for the chemicals dosing plant 2 to recirculated cooling water moisturizing 3 fluorescent tracer that adds 1; One is used for first photofluorometer 4 of on-line measurement recirculated cooling water moisturizing 3 fluorescent tracing agent concentrations; One is used for second photofluorometer 5 of on-line measurement recirculated cooling water fluorescent tracing agent concentration; One is used to calculate the concentration rate instrument controller 6 with Control Circulation chilled water cycles of concentration,
As shown in Figure 2, include the PID computing module 23 that is used to control on-line automatic control chemicals dosing plant at least in the described concentration rate instrument controller 6; Two analog quantity load modules 24,26 that receive above-mentioned two photofluorometer data respectively; Be used to control the switching value output module 28 of blowdown apparatus 8 operations.
The method that the present invention is used for Control Circulation chilled water cycles of concentration is to come Control Circulation water cycles of concentration according to the fluorescent tracer concentration change, its recirculating cooling water system comprises ebullator 9, cooling tower 10, process heat exchange system 7, water charging system 3 and blowdown apparatus 8 at least, first photofluorometer 4 and second photofluorometer 5 and concentration rate instrument controller 6 are connected in the above-mentioned recirculating cooling water system, and the technological process of control cycles of concentration is as follows:
The course of work of concentration rate instrument of the present invention is:
The concentration of fluorescent tracer detects in 4 pairs of moisturizings of first photofluorometer, transfers concentration signal to analog quantity electric signal (4-20mA), and signal is passed to analog quantity load module 24.
Concentration rate instrument controller 6 carries out PID computing 23 according to fluorescent tracer setting value 22 and by the data that analog quantity load module 24 is gathered; Then, regulate to frequency conversion dosing pump 2 by analog output module 21 output analog signalses and to add dose, make that the fluorescent tracing agent concentration reaches tracer agent setting value 22 in the moisturizing.
The concentration of fluorescent tracer detects in 5 pairs of chilled waters of second photofluorometer, transfers concentration signal to analog quantity electric signal (4-20mA), and signal is passed to analog quantity load module 26.
The data that concentration rate instrument controller 6 is gathered analog quantity load module 24, data and the cycles of concentration setting value 25 that analog quantity load module 26 is gathered compare computing 27, when the data ratio (being the recirculated water cycles of concentration of current state) that data of being gathered when analog quantity load module 24 and analog quantity load module 26 are gathered surpasses cycles of concentration setting value 25, concentration rate instrument controller 6 is by switching value output module 28 operation blowdown apparatus 8, and cooling water system begins blowdown.How to judge whether its blowdown finishes, can adopt two kinds of control modes, that is: finish by selecting blowing time length or cycles of concentration lower limit to control blowdown.
Although top invention has been described in conjunction with figure; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (5)
1. a method that is used for Control Circulation chilled water cycles of concentration is characterized in that, comes Control Circulation water cycles of concentration according to the fluorescent tracer concentration change, and its step is as follows:
Step 1, in the recirculated cooling water moisturizing, add to set the fluorescent tracer of concentration;
Step 2, use one first photofluorometer, the concentration of fluorescent tracer described in the moisturizing of on-line measurement recirculated cooling water, and, meet above-mentioned concentration requirement in order to guarantee the fluorescent tracer that in the recirculated cooling water moisturizing, is added by the automatic dosing pump of regulating of a concentration rate instrument controller;
Step 3, use one second photofluorometer, the concentration of the fluorescent tracer in the on-line measurement recirculated cooling water;
Step 4, according to the measured value of above-mentioned second photofluorometer and first photofluorometer, draw in the recirculated water cycles of concentration=recirculated cooling water of current state fluorescent tracing agent concentration in fluorescent tracing agent concentration/recirculated cooling water moisturizing;
Step 5, the above-mentioned concentration rate instrument controller of use are controlled a chilled water blowdown motorized valve, when the recirculated water cycles of concentration reaches setting value, and the operation of blowdown motorized valve, chilled water blowdown; Otherwise, return above-mentioned steps two.
2. according to the described method that is used for Control Circulation chilled water cycles of concentration of claim 1, it is characterized in that, the fluorescent tracer of described setting concentration, its concentration is 0.01ppm-1ppm.
3. according to the described method that is used for Control Circulation chilled water cycles of concentration of claim 1, it is characterized in that described fluorescent tracer is one of following six kinds of products:
1,5-naphthalenedisulfonic acid sodium salt;
1,3,6-naphthalene trisulfonic acid trisodium salt;
Naphthalene sulfonate salt;
8-hydroxyl-1,3,6-pyrene trisulfonic acid trisodium salt;
1-pyrene sulfonate sodium;
Resazurin.
4. a concentration rate instrument that is used for recirculating cooling water system is characterized in that, comprising:
-be used for chemicals dosing plant to recirculated cooling water fluorescent tracer that moisturizing adds;
One is used for first photofluorometer of on-line measurement recirculated cooling water moisturizing fluorescent tracing agent concentration;
One is used for second photofluorometer of on-line measurement recirculated cooling water fluorescent tracing agent concentration;
One is used for the concentration rate instrument controller of computation cycles chilled water cycles of concentration, includes at least in the described concentration rate instrument controller:
The PID computing module that is used for on-line automatic control chemicals dosing plant;
Two analog quantity load modules that receive above-mentioned two photofluorometer data respectively;
The switching value output module that is used for the operation of Control Circulation cooling water system blowdown apparatus.
5. concentration rate instrument according to claim 4 is characterized in that described chemicals dosing plant comprises the frequency conversion dosing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102271758A CN101943919B (en) | 2010-07-15 | 2010-07-15 | Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102271758A CN101943919B (en) | 2010-07-15 | 2010-07-15 | Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101943919A CN101943919A (en) | 2011-01-12 |
| CN101943919B true CN101943919B (en) | 2011-11-16 |
Family
ID=43435951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102271758A Active CN101943919B (en) | 2010-07-15 | 2010-07-15 | Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101943919B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130233796A1 (en) * | 2012-03-06 | 2013-09-12 | Narasimha M. Rao | Treatment of industrial water systems |
| CN103234591A (en) * | 2013-04-01 | 2013-08-07 | 国家电网公司 | System and method for measuring mass flow circulate water flow of power station based on luminoscope |
| CN104571164B (en) * | 2014-12-22 | 2017-05-17 | 北京时代源泉科技有限公司 | Online concentration multiple control method and device |
| CN109603179A (en) * | 2018-12-28 | 2019-04-12 | 天津鲲飞环保科技有限公司 | A kind of control method of recirculated cooling water cycles of concentration and the device of application this method |
| CN111680411B (en) * | 2020-05-29 | 2023-06-16 | 鞍钢股份有限公司 | Method for determining pollution discharge rate of circulating water cooling system through temperature concentration ratio |
| CN112484560B (en) * | 2020-10-20 | 2022-06-21 | 浙江中控技术股份有限公司 | Water-saving optimization method and system for industrial circulating water |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171450A (en) * | 1991-03-20 | 1992-12-15 | Nalco Chemical Company | Monitoring and dosage control of tagged polymers in cooling water systems |
| ES2050617B1 (en) * | 1992-10-22 | 1994-12-16 | Miret Lab | AQUEOUS SOLUTIONS OF ACRYLIC POLYMERS. |
| JPH09178662A (en) * | 1995-12-28 | 1997-07-11 | Kurita Water Ind Ltd | Concentration control method for water-based additive |
| US6280635B1 (en) * | 2000-05-01 | 2001-08-28 | Nalco Chemical Company | Autocycle control of cooling water systems |
| US7179384B2 (en) * | 2004-04-30 | 2007-02-20 | Nalco Company | Control of cooling water system using rate of consumption of fluorescent polymer |
| CN101070209A (en) * | 2007-06-20 | 2007-11-14 | 高邮市秦邮仪器化工有限公司 | Method and apparatus for automatically adding medicine in circulation system |
| CN201812213U (en) * | 2010-07-15 | 2011-04-27 | 天津天一清源科技发展有限公司 | Concentration ratio instrument for circulating cooling water system |
-
2010
- 2010-07-15 CN CN2010102271758A patent/CN101943919B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101943919A (en) | 2011-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101943919B (en) | Method for controlling concentration multiplying power of circulating cooling water and concentration multiplier | |
| CN102080820B (en) | Optimal energy-saving method for controlling surface pollutant discharge of steam boiler | |
| CN102445929B (en) | Circulated water system of thermal power plant | |
| CN202757522U (en) | Cooling tower circulating water on-line control system | |
| CN207473382U (en) | A kind of industrial circulating cooling water intelligent operation manages system | |
| CN201812213U (en) | Concentration ratio instrument for circulating cooling water system | |
| CN201892864U (en) | System for controlling water quality of circulating water | |
| CN201746413U (en) | Automatic monitoring and controlling device of water treatment system for recirculated cooling water | |
| CN204999750U (en) | On -line monitoring centralized control that refrigeration cycle is wateriness adds medicine blowdown control system | |
| CN109932198B (en) | Circulating water supply system for water purifier testing | |
| CN111747561A (en) | Automatic control system for water quality of high-level water collecting cooling tower of thermal power plant | |
| CN218435151U (en) | Fluorescent tracing method medicine adding device | |
| CN107628691B (en) | Aeration sewage treatment system and multi-parameter fuzzy control method thereof | |
| CN203704492U (en) | Automatic circulating water cooling system | |
| CN112214044B (en) | Circulating water automatic control system and method based on total amount control | |
| CN203499737U (en) | Automatic regulating device for water level in hot well of cement kiln low-temperature cogeneration turbine | |
| CN202257232U (en) | Circulating water system for thermal power plant | |
| CN211338989U (en) | Absorption heat pump waste heat water automatic reagent feeding water conservation processing system | |
| CN212050760U (en) | Intelligent accurate water-saving control system of wet-cold thermal power generating unit | |
| CN215855370U (en) | Online medicine adjusting device that adds of recirculated cooling water system | |
| CN204039104U (en) | A kind of circulating water device be applied in power station | |
| CN207473419U (en) | A kind of flow control system | |
| CN206901885U (en) | A kind of cooling water circulation utilization apparatus | |
| CN207862064U (en) | Recirculated water automatic control system | |
| CN102192564A (en) | Energy-saving improvement method for circulating water supplying and cooling system of central air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN KUNFEI ENVIRONMENTAL PROTECTION TECHNOLOGY Free format text: FORMER OWNER: TIANJIN TIANYI QINGYUAN TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20130701 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300192 NANKAI, TIANJIN TO: 300384 NANKAI, TIANJIN |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130701 Address after: 300384 Tianjin Lanyuan Binhai high tech Zone Huayuan Industrial Area No. 1, No. 919 by 2 Patentee after: Tianjin Kun fly Environmental Technology Co. Ltd. Address before: 300192, A building, 9 floor, Jinhui research building, No. 2 West Road, Tianjin, Nankai District Patentee before: Tianjin Tianyi Qingyuan Technology Development Co., Ltd. |