CN102173469B - Circulating cooling water system and operation method thereof - Google Patents
Circulating cooling water system and operation method thereof Download PDFInfo
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- CN102173469B CN102173469B CN2010106212388A CN201010621238A CN102173469B CN 102173469 B CN102173469 B CN 102173469B CN 2010106212388 A CN2010106212388 A CN 2010106212388A CN 201010621238 A CN201010621238 A CN 201010621238A CN 102173469 B CN102173469 B CN 102173469B
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- water
- cooling water
- recirculating
- circulating device
- conditioner
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Abstract
The invention relates to a circulating cooling water system and an operation method thereof. The circulating cooling water system provided by the invention is characterized in that a supplemented water quantity detection device is arranged between a water supplementing device and a cooling water circulator. By measuring the supplemented water quantity of the system, the addition quantity of a water treatment agent for maintaining the concentration of the water treatment agent in the system can be calculated. By using the circulating cooling water system and operation method provided by the invention, the difference between the actual concentration and set concentration of the water treatment agent in the circulating cooling water in the circulating cooling water system can be further reduced, thereby being beneficial to the stable and safe operation of the circulating cooling water system.
Description
Technical field
The present invention relates to a kind of recirculating cooling water system and operation method thereof, relate in particular to a kind of recirculating cooling water system and operation method thereof that comprises the open-type cooling water circulation device.
Background technology
Problems such as existing recirculating cooling water system (recirculating cooling water system that especially comprises the open-type cooling water circulation device) easy generation burn into fouling and bacterium algae grow.So, not only can reduce heat exchanger effectiveness, and can damage equipment.
So far; Common employing is carried out WQM (can in time the recirculated cooling water that does not meet water quality requirement partly be discharged outside the system, add make up water simultaneously) to the recirculated cooling water in the recirculating cooling water system that comprises the open-type cooling water circulation device and is reached the appearance that the method for in recirculated cooling water, introducing water conditioner (like inhibiter, Scale inhibitors and/or sterilant etc.) is avoided the problems referred to above.Hence one can see that, and the recirculated cooling water that has now in the recirculating cooling water system that comprises the open-type cooling water circulation device is to play pendulum.The water conditioning that how to keep recirculated cooling water reaches the water conditioner concentration of how keeping in the introducing recirculated cooling water and in a reasonable range, changes (rather than great change) in standard range, becomes and studies focus (in other words, being difficult point) in this area.
In order to keep in the recirculating cooling water system that comprises the open-type cooling water circulation device; Water conditioner steady concentration in the recirculated cooling water; The blowdown apparatus (rear end) that is employed at present said recirculating cooling water system usually is provided with flow detector, and the blowdown flow rate through said recirculating cooling water system calculates the amount of the water conditioner that needs to augment to recirculating cooling water system.Practice shows: prior art can not solve above-mentioned difficult point fully.
Summary of the invention
Contriver of the present invention finds after deliberation: comprise in the recirculating cooling water system of open-type cooling water circulation device; The loss of the water treatment dosage in the recirculated cooling water is not limited only to the discharging of the blowdown apparatus of recirculating cooling water system, is because " floating in the air " and/or " leakage " waits other uncontrollable factor to cause and the loss of quite a few water conditioner is arranged.Therefore, only come the loss of the water conditioner of computation cycles cooling water system, can have deviation, be unfavorable for the steady running of recirculating cooling water system through the blowdown flow rate of said recirculating cooling water system.
In view of the above, the present invention provides a kind of recirculating cooling water system that comprises the open-type cooling water circulation device and operation method thereof of novelty, overcomes the deficiency that exists in the prior art.
Recirculating cooling water system of the present invention, it comprises water replanishing device, cooling water circulating device and blowdown apparatus, and said water replanishing device, cooling water circulating device and blowdown apparatus link successively;
And, between said water replanishing device and said cooling water circulating device, be provided with the proofing unit (A) of rate of water make-up;
On said cooling water circulating device, be provided with water conditioner adding set (D), and the inlet temperature (t of said cooling water circulating device
1), temperature out (t
2), the on-line measuring device of cooling water circulation amount (R), envrionment temperature (T) and circulating cooling water quality;
Wherein: said cooling water circulating device is the open-type cooling water circulation device, and it comprises: cooling tower, recycle pump, pond and heat-exchange equipment (existing apparatus).
A kind of method of moving above-mentioned recirculating cooling water system, its key step is: by the proofing unit that is arranged on the rate of water make-up between said water replanishing device and said cooling water circulating device measure benefit (filling) water yield (M) of said recirculating cooling water system; By the t that is arranged on the said cooling water circulating device
1, t
2, R and T proofing unit obtain t
1, t
2, R and T numerical value, the steam output of computation cycles cooling water system (E); Calculate the amount (Y) that needs in said recirculating cooling water system, to add water conditioner by following formula (1); Startup is arranged on the water conditioner adding set on the said cooling water circulating device, adds water conditioner, keeps the setting concentration (C of water conditioner in the recirculated cooling water
0);
Y＝(M-E)×C
0 (1)
In the formula (1), E=(0.1+0.002T) (t
1-t
2) %R.
Adopt recirculating cooling water system provided by the present invention and operation method, can further dwindle in the said recirculating cooling water system, the actual concentrations of water conditioner and setting concentration (C in the recirculated cooling water
0) deviation, help the operation of the stable of said recirculating cooling water system and safety.
Description of drawings
Fig. 1 is the operational scheme synoptic diagram of recirculating cooling water system provided by the present invention;
Wherein: the proofing unit of A-rate of water make-up, D-water conditioner adding set.
Fig. 2 is the operational scheme synoptic diagram of the recirculating cooling water system that prior art provided;
Wherein: A
1The proofing unit of-blowdown flow rate, D-water conditioner adding set.
Embodiment
In optimized technical scheme of the present invention; On said water replanishing device; Except original device of gathering town water (being commonly called as tap water), also be provided with the device that can gather other water source (as: surface water is or/and middle water etc.), and water quality detecting device in the said water replanishing device.
In another optimized technical scheme of the present invention; In said cooling water circulating device, be provided with the water-level control apparatus (like float(ing)valve etc.) of Control Circulation water coolant Total Water; When system's generation blowdown when (comprising improper blowdowns such as normal blowdown and leakage, " floating in the air " loss) (system possesses the water yield when reducing), water compensating valve start working (promptly carrying out moisturizing);
In another optimized technical scheme of the present invention, be arranged on water quality detecting device on said water replanishing device and the cooling water circulating device and be combined electrode (like conductivity electrode or/and Cl
-Select electrode etc.).
Below in conjunction with accompanying drawing, the method for moving recirculating cooling water system according to the invention is done further to set forth.
A kind of method of moving recirculating cooling water system according to the invention, it comprises the following steps (referring to Fig. 1):
(1) water quality that detects make up water by the water quality detecting device (as: combined electrode 1) that is arranged on the water replanishing device is (as detecting its specific conductivity; Or certain ionic concentration etc.); As do not meet the set(ting)value requirement; Can adjust used town water and surface water or/and the ratio of middle water makes the water quality of make up water meet the set(ting)value requirement;
When the water quality that (2) detects water coolant in the said cooling water circulating device when the proofing unit (as: combined electrode 2) of circulating cooling water quality does not meet set(ting)value; This signal is transferred to online monitoring system C; Send the blowdown instruction by online monitoring system C to blowdown apparatus, start the blowdown apparatus blowdown;
(3) when said recirculating cooling water system carries out moisturizing, rate of water make-up (M) data transmission that is recorded by the proofing unit (A) of rate of water make-up is to online monitoring system C; And by being arranged on the t that proofing unit on the cooling water circulating device can obtain cooling water circulating device (like cooling tower etc.)
1, t
2, T and R real time data, and transfer to online monitoring system C, by online monitoring system C according to amount of makeup water M, t
1, t
2, T and R real time data, and water conditioner is set concentration (C in the said cooling water circulating device (like cooling tower etc.)
0), can obtain through computing: the setting concentration (C that keeps water conditioner in the said cooling water circulating device (like cooling tower etc.)
0) and calculate the amount (Y) of required interpolation water conditioner; C sends instruction by online monitoring system; Start water conditioner adding set (D); In described said cooling water circulating device (like cooling tower etc.), add water conditioner, keep water conditioner steady concentration in the said cooling water circulating device (like cooling tower etc.);
The present invention has following advantage:
(1) can effectively keep system stability, safe operation;
(2) changed the method that conventional back end (blowdown) is controlled; Angle from front-end control (moisturizing); Effectively accurately control drug concentration; System leak that traditional control can't overcome, influence such as suave have been eliminated; Make the calculating of blowdown flow rate more accurate, thus the control that makes adding consistency more accurately, more stable;
(3) front-end control of system can realize surface water or/and effective monitoring and the control of non-town water such as middle water during as the recirculated cooling water make up water; The project (temperature, flow) of front-end control monitoring is more convenient, more accurate, more economical; Big about-face the operated in accordance with conventional methods difficulty, the big shortcoming of investment working cost.
(4) interlock of water-quality guideline, automatic pollution discharge and Automatic Dosing control, the error that produces in the time of can significantly reducing manual operation is for good basis has been established in the robotization control that improves system.
In sum; Calculate the medicament magnitude of recruitment according to front-end control; Greatly reduce the medicament miscalculation, can keep the stable of system's water quality, the interlock of water-quality guideline, automatic pollution discharge and Automatic Dosing control through monitoring circulating water system water quality, the water yield; The error that produces in the time of significantly reducing manual operation helps the steady running of recirculating cooling water system.
By the following examples content of the present invention is further elaborated, its purpose only is better to understand the present invention.Therefore, listed protection scope of the present invention that do not limit.
Embodiment
Make up a recirculating cooling water system of the present invention (its flow process is seen Fig. 1), the water yield of possessing of this recirculating cooling water system is 100m
3, internal circulating load (R) is 2000m
3/ h and its make up water are town water (tap water), and setting water conditioner concentration in this system (phosphorus system) is that 5.0mg/L is (with PO
4 3-Meter).(that is: at the system water supplement end flow monitoring device A (Hangzhou special power sound UTG28 type magnetic flow meter) is set by the said operation method of preamble; The amount of makeup water of mensuration system (M); At the system water supplement end water-quality guideline monitoring device (U.S. DC4500 of Mi Dunluo company conductivity value unit) is set; Measure and replenish electrical conductivity of water, transfer to online monitoring system C; And online (environment) temperature (T) that records, cooling tower out temperature (t
1), (t
2), transfer to online monitoring system C, can get the steam output (E) of system; Thus, calculate the addition Y (getting) of the water conditioner of system, and send instruction, start water conditioner adding set (D) by online monitoring system C by formula (1); Water-quality guideline monitoring device (U.S. DC4500 of Mi Dunluo company conductivity value unit) is set on cooling water circulating device; Measure the systemic circulation electrical conductivity of water; When the circulation electrical conductivity of water reached set(ting)value 2200 μ s/cm, C sent instruction by online monitoring system, started blowdown apparatus; When the circulation electrical conductivity of water reaches set(ting)value 1800 μ s/cm, close blowdown apparatus.) move three months, observe the concentration change situation of water conditioner in water coolant in this system.
Comparative Examples
Make up an existing recirculating cooling water system (its flow process is seen Fig. 2), by following operation method: by the flow monitoring device A that is arranged on the blowdown apparatus
1(Hangzhou special power sound UTG28 type magnetic flow meter), measure the blowdown flow rate (B) of recirculating cooling water system, by formula (Y=B * C
0) calculate the amount (Y) that needs in said open type recirculating cooling water system, to add water conditioner; Start water conditioner adding set (D), the same embodiment of other processes moves three months, observes the concentration change situation of water conditioner in water coolant in this system.
Embodiment and Comparative Examples are moved three months under system condition, observe the concentration change situation of water treatment agent in cooling water in this system, the results are shown in Table 1.
Table 1
Can know by table 1: when adopting prior art (Comparative Examples); Drug concentration descends gradually; There are other blowdowns in illustrative system, and prior art can not count blowdown flow rate with this partial loss, in the system deviation η of the concentration of initial water treatment agent and minimum concentration be 83.3% (
C
1Be initial drug concentration, C
MinBe minimum drug concentration); When adopting recirculating cooling water system according to the invention and operation method thereof (embodiment), drug concentration is more stable, and the maximum deviation η of the concentration of initial water treatment agent and minimum concentration is 17.6% in the system; Provable thus: as to adopt recirculating cooling water system according to the invention and operation method thereof can effectively reduce the concentration deviation of water conditioner, help the steady running of system.
Claims (7)
1. recirculating cooling water system, it comprises water replanishing device, cooling water circulating device and blowdown apparatus, and said water replanishing device, cooling water circulating device and blowdown apparatus link to each other successively;
And, between said water replanishing device and said cooling water circulating device, be provided with the proofing unit (A) of amount of makeup water;
On said cooling water circulating device, be provided with water conditioner adding set (D), and the inlet temperature (t of said cooling water circulating device
1), temperature out (t
2), the proofing unit of cooling water circulation amount (R), envrionment temperature (T) and circulating cooling water quality;
Wherein: said cooling water circulating device is the open-type cooling water circulation device, and it comprises: cooling tower, recycle pump, pond and heat-exchange equipment.
2. recirculating cooling water system as claimed in claim 1; It is characterized in that, on said water replanishing device, except original device of gathering town water; Also be provided with the device at other water source that can gather non-town water, and water quality detecting device in the said water replanishing device.
3. recirculating cooling water system as claimed in claim 2 is characterized in that, wherein said other water source is that surface water is or/and middle water.
4. like any described recirculating cooling water system in the claim 1～3, it is characterized in that, be provided with the water-level control apparatus of Control Circulation water coolant Total Water in the pond in described cooling water circulating device.
5. recirculating cooling water system as claimed in claim 4 is characterized in that, wherein, the water quality detecting device that is arranged on said water replanishing device and the cooling water circulating device is a combined electrode.
6. recirculating cooling water system as claimed in claim 5 is characterized in that, wherein said combined electrode is that conductivity electrode is or/and Cl
-Select electrode.
7. the method for any described recirculating cooling water system in operation such as the claim 1～6; It is characterized in that the key step of said method is: by the proofing unit that is arranged on the rate of water make-up between said water replanishing device and said cooling water circulating device measure the rate of water make-up (M) of said recirculating cooling water system; By the t that is arranged on the said cooling water circulating device
1, t
2, R and T proofing unit obtain t
1, t
2, R and T numerical value; Calculate the amount (Y) that needs in said recirculating cooling water system, to add water conditioner by following formula (1); Startup is arranged on the water conditioner adding set on the said cooling water circulating device, adds water conditioner, keeps the setting concentration (C of water conditioner in the recirculated cooling water
0);
Y＝(M-E)×C
0 (1)
In the formula (1), E=(0.1+0.002T) (t
1-t
2) %R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106212388A CN102173469B (en) | 2010-12-31 | 2010-12-31 | Circulating cooling water system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106212388A CN102173469B (en) | 2010-12-31 | 2010-12-31 | Circulating cooling water system and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102173469A CN102173469A (en) | 2011-09-07 |
| CN102173469B true CN102173469B (en) | 2012-11-14 |
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ID=44516775
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106212388A Expired - Fee Related CN102173469B (en) | 2010-12-31 | 2010-12-31 | Circulating cooling water system and operation method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317282A (en) * | 2014-11-21 | 2015-01-28 | 张伟 | Industrial cold end circulating water optimization and energy saving control system |
| CN109084856B (en) * | 2018-07-19 | 2021-06-04 | 中国神华能源股份有限公司 | Flow measuring method for open circulating water system |
| CN109133388A (en) * | 2018-09-28 | 2019-01-04 | 南通善水化工科技发展有限公司 | A kind of open cooling water system compound water process stabilizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514248A (en) * | 2003-03-20 | 2004-07-21 | 北京科技大学 | Circulating cooling water quality monitoring system and equipment |
| CN1760136A (en) * | 2004-10-15 | 2006-04-19 | 中国科学院生态环境研究中心 | A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply |
| CN201463627U (en) * | 2009-04-14 | 2010-05-12 | 陈晓京 | Cooling tower water circulating system |
-
2010
- 2010-12-31 CN CN2010106212388A patent/CN102173469B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514248A (en) * | 2003-03-20 | 2004-07-21 | 北京科技大学 | Circulating cooling water quality monitoring system and equipment |
| CN1760136A (en) * | 2004-10-15 | 2006-04-19 | 中国科学院生态环境研究中心 | A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply |
| CN201463627U (en) * | 2009-04-14 | 2010-05-12 | 陈晓京 | Cooling tower water circulating system |
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| CN102173469A (en) | 2011-09-07 |
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