CN112108464B - Chemical cleaning device and method - Google Patents
Chemical cleaning device and method Download PDFInfo
- Publication number
- CN112108464B CN112108464B CN202010711471.9A CN202010711471A CN112108464B CN 112108464 B CN112108464 B CN 112108464B CN 202010711471 A CN202010711471 A CN 202010711471A CN 112108464 B CN112108464 B CN 112108464B
- Authority
- CN
- China
- Prior art keywords
- cleaning
- pipeline
- dosing
- isolation valve
- detection
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/22—Measuring resistance of fluids
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to the field of a nuclear power plant generator stator cooling water system, in particular to a chemical cleaning device and a method.
Description
Technical Field
The invention relates to the field of a nuclear power plant generator stator cooling water system, in particular to a chemical cleaning device and a chemical cleaning method.
Background
It is often necessary to inject one or more chemicals into a device that has become partially plugged (e.g., a generator stator cooling water system, hereinafter referred to as a GST system) to dissolve the plug and thereby achieve the purpose of unplugging. This method of dissolving and unblocking the blockage by the chemical is called chemical cleaning. Chemical cleaning is commonly used for equipment that is relatively complex to construct and inaccessible to mechanical tools or human hands.
At present, no on-line chemical cleaning equipment suitable for the GST system exists, namely, chemical cleaning is performed under the condition that a generator does not shut down, and power generation benefits caused by shutdown are inevitably lost through off-line cleaning.
Disclosure of Invention
In view of the above, it is desirable to provide a chemical cleaning apparatus and method suitable for online chemical cleaning of GST system.
A chemical cleaning device comprises a cleaning unit, a dosing unit, a detection unit and a control mechanism;
the cleaning unit is provided with a cleaning pipeline, the cleaning pipeline is provided with an inlet end and an outlet end, and the inlet end and the outlet end are respectively used for being communicated with a circulating water system;
the dosing unit comprises a dosing pipeline and a dosing pump, one end of the dosing pipeline is communicated with the cleaning pipeline, the other end of the dosing pipeline is communicated with an external medicine storage device, and the dosing pump is arranged on the dosing pipeline and is used for pumping the medicine in the medicine storage device into the cleaning pipeline so as to enter the circulating water system;
the detecting element is including detecting pipeline and conductivity detector, detect the pipeline communicate in wash the pipeline, the conductivity detector is used for detecting the conductivity of liquid in the detection pipeline, control mechanism with the conductivity detector and dosing pump electric connection, when the conductivity detector detects the conductivity and is higher than the setting value, control mechanism control dosing pump stop action.
In one embodiment, on the cleaning pipeline, the connection position of the detection pipeline is located between the inlet end and the outlet end, and the connection position of the medicine feeding pipeline is located between the connection position of the cleaning pipeline and the outlet end.
In one embodiment, the cleaning unit further comprises a first cleaning isolation valve and a second cleaning isolation valve, the first cleaning isolation valve is connected to the cleaning pipeline and located between the connection position of the detection pipeline and the inlet end, and the second cleaning isolation valve is connected to the cleaning pipeline and located between the connection position of the dosing pipeline and the outlet end.
In one embodiment, the cleaning unit further comprises a cleaning exhaust pipe and a cleaning exhaust isolation valve, the cleaning exhaust pipe is communicated with the cleaning pipe and is located between the first cleaning isolation valve and the second cleaning isolation valve, and the cleaning exhaust isolation valve is connected to the cleaning exhaust pipe.
In one embodiment, the purge unit further comprises a purge flow regulating valve connected to the purge line.
In one embodiment, the cleaning unit further comprises a cleaning check valve connected to the cleaning pipeline and located between the dosing pipeline and the detection pipeline, and/or a third cleaning isolation valve connected to the cleaning pipeline and located between the dosing pipeline and the detection pipeline.
In one embodiment, the cleaning unit further comprises a filter connected to the cleaning conduit.
In one embodiment, the dosing unit further comprises a dosing exhaust pipeline and a dosing exhaust isolation valve, the dosing exhaust pipeline is communicated with the dosing pipeline and is located between one end of the dosing pipeline, connected to the cleaning pipeline, and the dosing pump, and the dosing exhaust isolation valve is connected to the second exhaust pipeline.
In one embodiment, the dosing unit further comprises a dosing check valve connected to the dosing pipeline and located between one end of the dosing pipeline connected to the cleaning pipeline and the dosing pump, and/or a dosing isolation valve connected to the dosing pipeline and located between one end of the dosing pipeline connected to the cleaning pipeline and the dosing pump.
In one embodiment, the dosing unit includes a plurality of dosing branches connected in parallel, and each dosing branch includes the dosing pipeline and the dosing pump.
In one embodiment, the detection unit further comprises a dissolved oxygen detector disposed on the detection pipeline, and the dissolved oxygen detector is configured to detect a dissolved oxygen content of the liquid in the detection pipeline.
A chemical cleaning method is used for carrying out chemical cleaning on a circulating water system by using the chemical cleaning device in any embodiment.
Compared with the prior art, the chemical cleaning device and the chemical cleaning method have the following beneficial effects:
above-mentioned chemical cleaning device sets up the cleaning unit and realizes that liquid circulation flow washs, continuous sampling, sets up the interpolation that adds the medicine unit and realize chemical agent, sets up the detecting element and carries out continuous sampling analysis, and through the volume that conductivity detector and control mechanism automatic control added the medicine, adaptable in the online chemical cleaning of GST system avoids the off-line to wash the power generation income loss that leads to.
The chemical cleaning method adopts the chemical cleaning device and has the beneficial effects.
Drawings
Fig. 1 is a schematic structural diagram of a chemical cleaning apparatus according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a chemical cleaning apparatus 10 according to an embodiment of the present invention includes a cleaning unit, a dosing unit, a detection unit, and a control mechanism 903.
Wherein, the cleaning unit comprises a cleaning pipe 110, the cleaning pipe 110 has an inlet end 101 and an outlet end 102, and the inlet end 101 and the outlet end 102 are respectively used for communicating with a circulating water system, such as a generator stator cooling water system (GST system).
The medicine adding unit comprises a medicine adding pipeline 120 and three medicine adding pumps (201/202/203 in the specific example shown in fig. 1), one end of the medicine adding pipeline 120 is communicated with the cleaning pipeline 110, the other end of the medicine adding pipeline 120 is used for being communicated with an external medicine storage device, and the medicine adding pumps are arranged on the medicine adding pipeline 120 and used for pumping the medicines in the medicine storage device into the cleaning pipeline 110 so as to enter the circulating water system.
The detection unit comprises a detection pipeline 130 and a conductivity detector (801/803 is two conductivity detectors in the specific example shown in fig. 1), the detection pipeline 130 is communicated with the cleaning pipeline 110, the conductivity detector is arranged on the detection pipeline 130, the conductivity detector is used for detecting the conductivity of the liquid in the detection pipeline 130, the control mechanism 903 is electrically connected with the conductivity detector and the dosing pump, when the conductivity detector detects that the conductivity is in a set range, the control mechanism 903 controls the dosing pump to operate, and when the conductivity detector detects that the conductivity is higher than a set value, the control mechanism 903 controls the dosing pump to stop operating.
On the cleaning tube 110, the connection position of the detection tube 130 is located between the inlet end 101 and the outlet end 102 and closer to the inlet end 101, and the connection position of the medicine adding tube 120 is located between the connection position of the cleaning tube 110 and the outlet end 102.
The cleaning unit further comprises a first cleaning isolation valve 404 and a second cleaning isolation valve 414, the first cleaning isolation valve 404 is connected to the cleaning pipe 110 and located between the connection position of the detection pipe 130 and the inlet port 101, and the second cleaning isolation valve 414 is connected to the cleaning pipe 110 and located between the connection position of the dosing pipe 120 and the outlet port 102.
In one example, cleaning pipeline 110 includes a first flexible pipe segment 104, a rigid pipe segment, and a second flexible pipe segment 105, which are connected in sequence, where first flexible pipe segment 104 is located at inlet end 101, second flexible pipe segment 105 is located at outlet end 102, first flexible pipe segment 104 and second flexible pipe segment 105 facilitate connection to a circulating water system, and rigid pipe segment is conveniently provided with components such as a valve, a flow meter, and the like. First flexible tube segment 104 and second flexible tube segment 105 may be formed of rubber, for example, and rigid tube segments may be formed of stainless steel, for example.
In one example, the purge unit further includes a purge exhaust line 112 and a purge exhaust isolation valve 405, the purge exhaust line 112 is in communication with the purge line 110 and is located between the first purge isolation valve 404 and the second purge isolation valve 414, and the purge exhaust isolation valve 405 is connected to the purge exhaust line 112. The purge exhaust line 112 and purge exhaust isolation valve 405 may be used to vent the inlet line, on the one hand, and also for manual sampling, on the other hand.
In one example, the purge unit further includes a flow purge flow regulating valve 601 and a purge flow meter 701, and the flow purge flow regulating valve 601 and the purge flow meter 701 are connected to the purge line 110. The flow purge flow control valve 601 is used to regulate the flow. The purge flow meter 701 is used to display the flow rate.
In one example, the purge unit further includes a purge check valve 504, the purge check valve 504 being connected to the purge conduit 110 and located between the medicated conduit 120 and the detection conduit 130. The purge check valve 504 is used to prevent backflow of fluid, especially chemical, to the detection unit during operation of the dosing pump in the dosing unit.
In one example, the cleaning unit further comprises a third cleaning isolation valve 410, the third cleaning isolation valve 410 being connected to the cleaning tubing 110 and located between the dosing tubing 120 and the detection tubing 130. The third cleaning isolation valve 410 is used for communicating or isolating the dosing unit and the detection unit.
In one example, the cleaning unit further comprises a filter 020, the filter 020 being connected to the cleaning conduit 110. The filter 020 is used for intercepting particulate impurities in the fluid, especially mechanical impurities from the dosing unit, having a particle size of more than 25 μm. The filter 020 can be a stainless steel pipeline filter. In the particular example illustrated, a filter 020 is disposed between purge conduit 110 and second purge isolation valve 414.
In one example, the dosing pump is a metering pump, and more particularly, a high-precision small-dose pump can be used, so that the chemical reagent can be injected stably and accurately in a small dose.
In one example, the dosing unit further includes a dosing exhaust pipe 132 and a dosing exhaust isolation valve 411, the dosing exhaust pipe 132 is communicated with the dosing pipe 120 and is located between one end of the dosing pipe 120 connected to the cleaning pipe 110 and the dosing pump, and the dosing exhaust isolation valve 411 is connected to the dosing exhaust pipe 132.
In one example, the medicine adding unit further includes a chemical container for containing a chemical, and the medicine adding pipe 120 is communicated with the chemical container.
In one example, the dosing unit further includes a dosing check valve 501, and the dosing check valve 501 is connected to the dosing pipe 120 and is located between one end of the dosing pipe 120 connected to the cleaning pipe 110 and the dosing pump. The medicated check valve 501 is used to prevent fluid in the purge line 110 from flowing back into the medicated line 120.
In one example, the dosing unit further comprises a dosing isolation valve 401, the dosing isolation valve 401 being connected to the dosing tube 120 and located between the end of the dosing tube 120 connected to the purging tube 110 and the dosing pump. The dosing isolation valve 401 is used to communicate or isolate the purge line 110 and the dosing line 120.
In one example, the dosing unit includes a plurality of dosing branches connected in parallel, each dosing branch including a dosing tube 120 and a dosing pump. Set up a plurality of medicine shunts, can add different chemical agents through the medicine shunt of adding of difference.
In the illustrated specific example, the dosing unit includes 3 dosing branches, each dosing branch includes a dosing pump, a dosing isolation valve 401, and a dosing check valve 501 sequentially disposed on the dosing pipeline 120, and further includes a dosing exhaust pipeline 132 and a dosing exhaust isolation valve 411, the dosing exhaust pipeline 132 is disposed between the dosing pump and the dosing isolation valve 401, and the dosing exhaust isolation valve 411 is connected to the dosing exhaust pipeline 132.
In one example, the detecting unit further includes an alarm, the alarm is electrically connected to the control mechanism 903, and when the conductivity detector detects that the conductivity is higher than a set value, the control mechanism 903 controls the alarm to give an alarm.
In one example, the detection unit further includes a dissolved oxygen detector 802, the dissolved oxygen detector 802 is disposed on the detection pipe 130, and the dissolved oxygen detector 802 is used for detecting the dissolved oxygen content of the liquid in the detection pipe 130.
In one example, the dissolved oxygen detector 802 is electrically connected to the control mechanism 903, and the control mechanism 903 controls the dosing pump to stop when the dissolved oxygen content is higher than a set value.
In one example, the detection unit further comprises a detection isolation valve 407, and the detection isolation valve 407 is disposed on the detection conduit 130.
In one example, the detection unit further includes a detection flow regulating valve disposed on the detection pipe 130. In the illustrated specific example, there are 602/603/604 detection flow rate adjustment valves in the detection unit.
Further, the present invention also provides a chemical cleaning method for chemically cleaning a circulating water system using the chemical cleaning apparatus according to any of the above examples.
Above-mentioned chemical cleaning device sets up the cleaning unit and realizes that liquid circulation flow washs, continuous sampling, sets up the interpolation that adds the medicine unit and realize chemical agent, sets up the detecting element and carries out continuous sampling analysis, and through the volume that conductivity detector and control mechanism automatic control added the medicine, adaptable in the online chemical cleaning of GST system avoids the off-line to wash the power generation income loss that leads to.
The chemical cleaning method adopts the chemical cleaning device and has the beneficial effects.
The present invention is further illustrated by the following specific example of a chemical cleaning apparatus 10.
As shown in fig. 1, the chemical cleaning apparatus 10 of the present specific example can be used for chemical cleaning of a generator stator cooling water system (GST system). The chemical cleaning device 10 includes a cleaning unit, a dosing unit, a detection unit, and a control mechanism 903.
The cleaning unit comprises a cleaning pipe 110, the cleaning pipe 110 has an inlet end 101 and an outlet end 102, the cleaning pipe 110 comprises a first flexible pipe section 104, a rigid pipe section and a second flexible pipe section 105 which are connected in sequence, the inlet end 101 of the cleaning pipe 110 is arranged on the first flexible pipe section 104, and the inlet end 101 of the cleaning pipe 110 is arranged on the second flexible pipe section 105.
The rigid pipe section is provided with a first cleaning isolation valve 404, a cleaning exhaust pipeline 112 (the cleaning exhaust pipeline 112 is provided with a cleaning exhaust isolation valve 405), a cleaning flow regulating valve 601, a cleaning flow meter 701, a fourth cleaning isolation valve 406, a cleaning check valve 504, a third cleaning isolation valve 410, a filter 020 and a second cleaning isolation valve 414 in sequence from the position close to the inlet end 101 to the position close to the outlet end 102.
The operation steps of the cleaning unit may be performed in the following order:
1. the first flexible pipe section 104 is connected to the high pressure side of the GST system (e.g., the outlet of the GST pump). Second flexible tubing segment 105 is connected to the low pressure side of the GST system (e.g., the inlet of the GST pump);
2. opening the first purge isolation valve 404;
3. opening a cleaning exhaust isolation valve 405 to exhaust the cleaning pipeline 110;
4. close purge exhaust isolation valve 405;
5. opening the second purge isolation valve 414;
6. opening the third wash isolation valve 410;
7. opening 406;
8. slowly opening a flow cleaning flow regulating valve 601, regulating the flow to be in a proper range, and observing the flow through a glass window of the cleaning flow meter 701;
9. the purge exhaust isolation valve 405 may be opened to allow for manual sampling if desired, and the valve 405 closed after sampling.
During the chemical cleaning of the GST system, the cleaning unit is always in operation, i.e. the fluid is uninterrupted.
The medicine adding unit comprises 3 medicine adding branches.
The first medicine adding branch comprises a medicine adding pump 201, a medicine adding isolation valve 401 and a medicine adding check valve 501 which are sequentially arranged on the medicine adding pipeline 120, and further comprises a medicine adding exhaust pipeline 132 and a medicine adding exhaust isolation valve 411, the medicine adding exhaust pipeline 132 is arranged between the medicine adding pump 201 and the medicine adding isolation valve 401, and the medicine adding exhaust isolation valve 411 is connected to the medicine adding exhaust pipeline 132. One end of the medicine feeding pipeline 120 is connected with the cleaning pipeline 110, and the other end is connected with the chemical agent container 301. The chemical container 301 is used to contain a chemical A, which is added to the cleaning tube 110 to increase the conductivity of the liquid.
The second dosing branch comprises a dosing pump 202, an isolation valve 402 and a check valve 502 which are sequentially arranged on the dosing pipeline 120, and further comprises a dosing exhaust pipeline 132 and an isolation valve 412, the dosing exhaust pipeline 132 is arranged between the dosing pump 202 and the isolation valve 402, and the isolation valve 412 is connected to the dosing exhaust pipeline 132. The drug-adding branch is arranged as a backup of the chemical injection branch.
The third medicine adding branch comprises a medicine adding pump 203, an isolation valve 403 and a check valve 503 which are sequentially arranged on the medicine adding pipeline 120, and further comprises a medicine adding exhaust pipeline 132 and an isolation valve 413, the medicine adding exhaust pipeline 132 is arranged between the medicine adding pump 203 and the isolation valve 403, and the isolation valve 413 is connected to the medicine adding exhaust pipeline 132. One end of the medicine feeding pipeline 120 is connected with the cleaning pipeline 110, and the other end is connected with the chemical agent container 303. The chemical container 303 is used to contain a chemical B, which is added to the cleaning pipe 110 to increase the dissolved oxygen content of the liquid.
The dosing pump 201, the dosing pump 202 and the dosing pump 203 are metering pumps for small-dose accurate dosing, and all take electricity from the power strip 011. The hoses 101, 102, and 103 are suction hoses of the dosing pumps 201, 202, and 203, respectively.
The operation steps of the dosing unit may be performed in the following order:
a first dosing branch:
1. preparing a chemical agent A in a chemical agent container 301 in advance;
2. placing hose 101 into chemical container 301;
3. the dosing exhaust isolation valve 411 is opened;
4. starting the dosing pump 201;
5. after the continuous water flow is discharged from 411, the dosing isolation valve 401 is opened, and then the dosing exhaust isolation valve 411 is immediately closed.
The dosing branch is used for continuously injecting chemical agent A into the GST system (after the chemical agent A is injected into the GST loop, the conductivity of the GST loop is obviously increased); when the control mechanism 903 judges that the conductivity of the water sample is higher than a fixed value, the power supply to the component 011 is cut off and an acousto-optic alarm is given out, so that all metering pumps are automatically stopped from operating (dosing). If the control mechanism 903 has a fault, the staff can also decide whether to stop the operation of all the metering pumps manually according to the indication value of the component 901 (the current is switched on and off by pressing a switch on 011).
A second dosing branch:
1. preparing a chemical agent B in a chemical agent container 302 in advance;
2. placing the hose 103 into the chemical container 303;
3. opening isolation valve 413;
4. starting the dosing pump 203;
5. isolation valve 403 is opened after continuous flow of water is discharged 411 and isolation valve 413 is immediately closed.
This branch is used to inject chemical B into the GST system (after chemical B is injected into the GST loop, the oxygen content of the GST loop changes). On the premise that the component 011 obtains the power supply of the component 903, the chemical cleaning staff can start or stop the metering pump 203 according to the requirement.
The detection unit comprises 3 detection branches.
The first detection branch comprises a detection pipeline 130, and a flow control valve 604, a flow meter 704, a conductivity detector 803 and an isolation valve 409 which are sequentially arranged on the detection pipeline 130, one end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is positioned between the fourth cleaning isolation valve 406 and the cleaning check valve 504, the other end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is positioned between the first cleaning isolation valve 404 and the flow control valve 601, the control mechanism 903 is electrically connected with the conductivity detector 803, the alarm and the dosing pump 201, when the conductivity detector detects that the conductivity is higher than a set value (for example, higher than 8 mus/cm), the control mechanism 903 controls the dosing pump to stop operating, and controls the alarm to give an alarm.
The second detection branch comprises a detection pipeline 130, and a flow control valve 603, a flow meter 703, a dissolved oxygen detector 802 and an isolation valve 408 which are sequentially arranged on the detection pipeline 130, wherein one end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is positioned between the fourth cleaning isolation valve 406 and the cleaning check valve 504, and the other end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is positioned between the first cleaning isolation valve 404 and the flow control valve 601. The dissolved oxygen detector 802 is electrically connected to the display mechanism 902, and displays the detection result through the display mechanism 902, thereby facilitating the determination of the operator whether to stop injecting the chemical agent B.
The third detection branch comprises a detection pipeline 130, and a detection flow control valve 602, a flow meter 702, a conductivity detector 801 and a detection isolation valve 407 which are sequentially arranged on the detection pipeline 130, wherein one end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is located between the fourth cleaning isolation valve 406 and the cleaning check valve 504, and the other end of the detection pipeline 130 is connected to the cleaning pipeline 110 and is located between the first cleaning isolation valve 404 and the flow control valve 601. The conductivity detector 801 is electrically connected to the display means 901, and the detection result is displayed by the display means 901, and if the control means 903 has a failure, the operator can also determine whether to stop injecting the chemical agent a by the display means 901.
The display means 901, the display means 902, and the control means 903 are supplied with power from the strip 010.
In this example, each isolation valve is a ball valve, and each flow control valve is a needle valve.
The chemical cleaning device of this example is applied to No. two unit generator stator cooling water system of nuclear power plant in Ling and Australia successfully to its implementation online chemical cleaning, has dredged L2GST line stick, has solved the unusual rising problem of temperature.
The application of the chemical cleaning device to the on-line chemical cleaning of the generator stator cooling water system has two benefits:
1) the device can realize the autonomous online chemical cleaning without needing service outsourcing, the single price of the service outsourcing is 300 ten thousand RMB, and the service outsourcing cost can be saved by 300 RMB/time.
2) The construction period of the online chemical cleaning is 6 days, and the power generation yield of 6 days is about 6000 million. Without this unit, an off-line chemical clean-up (shut-down) would need to be performed with a loss of 6000 million.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A chemical cleaning device is characterized by comprising a cleaning unit, a dosing unit, a detection unit and a control mechanism;
the cleaning unit is provided with a cleaning pipeline, the cleaning pipeline is provided with an inlet end and an outlet end, and the inlet end and the outlet end are respectively used for being communicated with a circulating water system; on the cleaning pipeline, the connecting position of the detection pipeline is located between the inlet end and the outlet end, the connecting position of the dosing pipeline is located between the connecting position of the cleaning pipeline and the outlet end, the cleaning unit further comprises a first cleaning isolation valve and a second cleaning isolation valve, the first cleaning isolation valve is connected to the cleaning pipeline and located between the connecting position of the detection pipeline and the inlet end, the second cleaning isolation valve is connected to the cleaning pipeline and located between the connecting position of the dosing pipeline and the outlet end, the cleaning unit further comprises a cleaning exhaust pipeline and a cleaning exhaust isolation valve, the cleaning exhaust pipeline is communicated with the cleaning pipeline and located between the first cleaning isolation valve and the second cleaning isolation valve, and the cleaning exhaust isolation valve is connected to the cleaning exhaust pipeline;
the dosing unit comprises a dosing pipeline and a dosing pump, one end of the dosing pipeline is communicated with the cleaning pipeline, the other end of the dosing pipeline is communicated with an external medicine storage device, and the dosing pump is arranged on the dosing pipeline and is used for pumping the medicine in the medicine storage device into the cleaning pipeline so as to enter the circulating water system;
the detecting element is including detecting pipeline, conductivity detector and dissolved oxygen detector, detect the pipeline communicate in wash the pipeline, the conductivity detector is used for detecting the conductivity of liquid in the detection pipeline, control mechanism with the conductivity detector and dosing pump electric connection works as when the conductivity detector detects the conductivity and is higher than the setting value, control mechanism control the dosing pump stops the action, the dissolved oxygen detector sets up on the detection pipeline, the dissolved oxygen detector is used for detecting the dissolved oxygen content of liquid in the detection pipeline, the dissolved oxygen detector with control mechanism electric connection works as when the dissolved oxygen content that the dissolved oxygen detector detected is higher than the setting value, control mechanism control the dosing pump is shut down.
2. The chemical cleaning apparatus as claimed in claim 1, wherein the detecting unit further comprises an alarm, the alarm is electrically connected to the control mechanism, and the control mechanism controls the alarm to give an alarm when the conductivity detector detects that the conductivity is higher than a set value.
3. The chemical cleaning apparatus of claim 1, wherein the detection unit further comprises a detection isolation valve disposed on the detection conduit.
4. The chemical cleaning apparatus according to claim 1, wherein the detection unit further comprises a detection flow regulating valve provided on the detection pipe.
5. The chemical cleaning apparatus of claim 1, wherein the cleaning unit further comprises a cleaning flow regulating valve connected to the cleaning pipe.
6. The chemical cleaning device according to any one of claims 1 to 5, wherein the cleaning unit further comprises a cleaning check valve connected to the cleaning pipeline and located between the dosing pipeline and the detection pipeline, and/or a third cleaning isolation valve connected to the cleaning pipeline and located between the dosing pipeline and the detection pipeline.
7. A chemical cleaning device as claimed in any one of claims 1 to 5, wherein the cleaning unit further comprises a filter, the filter being connected to the cleaning conduit.
8. The chemical cleaning device according to any one of claims 1 to 5, wherein the dosing unit further comprises a dosing exhaust pipeline and a dosing exhaust isolation valve, the dosing exhaust pipeline is communicated with the dosing pipeline and is located between one end of the dosing pipeline connected to the cleaning pipeline and the dosing pump, and the dosing exhaust isolation valve is connected to the dosing exhaust pipeline.
9. The chemical cleaning device according to claim 8, wherein the dosing unit further comprises a dosing check valve connected to the dosing pipeline and located between the end of the dosing pipeline connected to the cleaning pipeline and the dosing pump, and/or a dosing isolation valve connected to the dosing pipeline and located between the end of the dosing pipeline connected to the cleaning pipeline and the dosing pump.
10. The chemical cleaning device according to any one of claims 1 to 5, wherein the dosing unit comprises a plurality of dosing branches connected in parallel, each dosing branch comprising the dosing pipeline and the dosing pump.
11. A chemical cleaning method characterized by chemically cleaning a circulating water system using the chemical cleaning apparatus according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711471.9A CN112108464B (en) | 2020-07-22 | 2020-07-22 | Chemical cleaning device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711471.9A CN112108464B (en) | 2020-07-22 | 2020-07-22 | Chemical cleaning device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112108464A CN112108464A (en) | 2020-12-22 |
| CN112108464B true CN112108464B (en) | 2022-05-10 |
Family
ID=73798806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010711471.9A Active CN112108464B (en) | 2020-07-22 | 2020-07-22 | Chemical cleaning device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112108464B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156204B (en) * | 2022-08-03 | 2023-12-22 | 中广核工程有限公司 | Flushing system and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203715405U (en) * | 2013-12-10 | 2014-07-16 | 上海雷林工程技术有限公司 | Dosing control device |
| JP5946563B1 (en) * | 2015-06-16 | 2016-07-06 | イノベーティブ・デザイン＆テクノロジー株式会社 | Purification device and heat exchange system using the purification device |
| CN106414805A (en) * | 2014-07-04 | 2017-02-15 | 三菱日立电力系统株式会社 | Chemical washing method and chemical washing device |
| CN206074451U (en) * | 2016-09-22 | 2017-04-05 | 常州罗盘星检测科技有限公司 | Can dosing water monitoring device |
| CN107376647A (en) * | 2017-09-13 | 2017-11-24 | 新地能源工程技术有限公司 | Device is filtered by a kind of open circulating water and uses its circulating water treatment method |
| CN110132046A (en) * | 2018-02-09 | 2019-08-16 | 三菱日立电力系统株式会社 | Chemically-cleaning device and the chemical cleaning method for having used the chemically-cleaning device |
| CN209307017U (en) * | 2018-12-11 | 2019-08-27 | 国家能源集团谏壁发电厂 | A kind of Thermal Power Station's generator cooling-water water quality self-checking device |
| CN210438529U (en) * | 2019-07-02 | 2020-05-01 | 四川省雪宝矿泉水有限公司 | Reproducible double-membrane filtration water purifying device |
-
2020
- 2020-07-22 CN CN202010711471.9A patent/CN112108464B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203715405U (en) * | 2013-12-10 | 2014-07-16 | 上海雷林工程技术有限公司 | Dosing control device |
| CN106414805A (en) * | 2014-07-04 | 2017-02-15 | 三菱日立电力系统株式会社 | Chemical washing method and chemical washing device |
| JP5946563B1 (en) * | 2015-06-16 | 2016-07-06 | イノベーティブ・デザイン＆テクノロジー株式会社 | Purification device and heat exchange system using the purification device |
| CN206074451U (en) * | 2016-09-22 | 2017-04-05 | 常州罗盘星检测科技有限公司 | Can dosing water monitoring device |
| CN107376647A (en) * | 2017-09-13 | 2017-11-24 | 新地能源工程技术有限公司 | Device is filtered by a kind of open circulating water and uses its circulating water treatment method |
| CN110132046A (en) * | 2018-02-09 | 2019-08-16 | 三菱日立电力系统株式会社 | Chemically-cleaning device and the chemical cleaning method for having used the chemically-cleaning device |
| CN209307017U (en) * | 2018-12-11 | 2019-08-27 | 国家能源集团谏壁发电厂 | A kind of Thermal Power Station's generator cooling-water water quality self-checking device |
| CN210438529U (en) * | 2019-07-02 | 2020-05-01 | 四川省雪宝矿泉水有限公司 | Reproducible double-membrane filtration water purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112108464A (en) | 2020-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101290313B (en) | Stream type cell device and method | |
| CN102426260B (en) | Auto-sampler cleaning mechanism | |
| CN112108464B (en) | Chemical cleaning device and method | |
| WO2022095521A1 (en) | Water quality monitoring device | |
| CN107130287B (en) | Online concentration detection and dosing integrated device for electroplating bath solution | |
| CN213265779U (en) | Multifunctional circulating water treatment agent device | |
| CN113390626B (en) | Micro-flow pump valve device testing system and testing method | |
| CN110595783B (en) | Pump pressure type liquid flow test system | |
| CN112392707A (en) | Fluid pressure control device | |
| JP5878049B2 (en) | Chemical injection device | |
| CN211292599U (en) | Soft water hardness on-line monitoring system | |
| CN102680280B (en) | Liquid sampling device | |
| CN210923075U (en) | Liquid flow test system | |
| KR20160127935A (en) | Antiseptic solution input equipment equipped with a feeding monitoring function | |
| JP2020526280A5 (en) | ||
| CN109884265A (en) | A kind of one-piece type water quality monitoring system of miniaturization multiple groups part | |
| CN106121620B (en) | Oil/gas well sulphur removal and residual acid solution processing unit and operating method | |
| CN114910317A (en) | Multi-channel air extraction sampling type detection system suitable for limited space and control method | |
| CN209674895U (en) | A kind of Nuclear power plant main pipeline gauge pipe hot spot back purge system | |
| CN108906880B (en) | Soil and groundwater remediation system and remediation method | |
| CN112892614A (en) | Resin integrated regenerating device | |
| CN106139941B (en) | Parallel connection type dissolves measuring equipment | |
| CN111832754A (en) | Method for detecting abnormality of pressure feedback signal of constant-pressure water supply system | |
| CN208712373U (en) | A kind of pipe-line system for cleaning dipper | |
| CN117212132A (en) | Plunger pump type decontamination metering device |
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 |