CN210427510U - Effect evaluation test device for simulating application of nuclear power station dispersing agent - Google Patents
Effect evaluation test device for simulating application of nuclear power station dispersing agent Download PDFInfo
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- CN210427510U CN210427510U CN201920915172.XU CN201920915172U CN210427510U CN 210427510 U CN210427510 U CN 210427510U CN 201920915172 U CN201920915172 U CN 201920915172U CN 210427510 U CN210427510 U CN 210427510U
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Abstract
The utility model provides an effect aassessment test device for simulating nuclear power station dispersant is used, include the medicine mixing box that adds that is used for preparing experimental suspension that connects gradually via metal pipeline, be used for adjusting the variable frequency circulating pump of experimental suspension circulation flow and be used for simulating the buffer tank of two return circuits heating container, still including the online conductance table that is used for monitoring the conductivity of experimental suspension, the online pH meter that is used for monitoring the pH value of experimental suspension, be used for online monitoring the online turbidity meter and the circulation path control butterfly valve of the turbidity change of experimental suspension in the continuous cycle process. By the utility model, the dispersing effect of the dispersing agent can be dynamically evaluated; the influence of temperature and flow rate on the dispersing effect of the dispersing agent can be researched; the pipe diameter of the test loop is changed, and different flow field distributions can be simulated; the dispersion effect can be automatically evaluated by being close to the actual application working condition.
Description
Technical Field
The utility model relates to a nuclear power station technical field especially relates to an effect evaluation test device for simulating nuclear power station dispersant is used.
Background
During a shutdown overhaul of a unit, corrosion of the secondary loop thermal equipment and piping of a nuclear power plant inevitably occurs, wherein the main corrosion products are iron oxides, e.g. Fe3O4、Fe2O3And small amounts of Ca, Si, Al oxides. These corrosion products are suspended in the water of the two-loop system, migrate into the evaporator after the unit is started, deposit in the evaporator, cause under-scale corrosion of the internal components of the evaporator, and cause the heat transfer efficiency of the heat transfer pipe to be reduced.
The dispersant is added into the suspension system to improve the surface repulsive force of the particles, avoid particle agglomeration, maintain the particles in the suspension system in a suspension state and slow down the gravity settling rate of the particles. During the nuclear power station is shut down, the dispersant is injected when the machine is started to flush and the evaporator is subjected to wet maintenance, so that corrosion products in the system can be dispersed, the removal amount of the corrosion products during the drainage of the system is increased, the migration of the corrosion products of the two loops to the steam generator is reduced, the deposition of the corrosion products in the evaporator is relieved, and the operation safety and the economical efficiency of the evaporator are improved.
However, different dispersants have different dispersing effects on common corrosion products of nuclear power plants. Therefore, dispersant screening for a particular power plant is required prior to dosing. Conventional dispersion effect evaluation methods are generally static evaluations, for example, measurement of standing suspension transmittance, turbidity, or measurement of particle surface Zeta potential. Compared with the actual working condition, the conventional evaluation method has the following defects: the influence of the water flow on the dispersion effect is not considered; the measurement condition is room temperature, and the influence of the temperature on the dispersing effect of the dispersing agent is not considered; the dispersing effect of the dispersant on the deposited corrosion products cannot be evaluated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an effect aassessment test device for simulating nuclear power station dispersant is used, can be simple, quick, effectual evaluation dispersant dispersion effect.
The embodiment of the utility model provides an effect aassessment test device for simulating nuclear power station dispersant is used for, include the medicine mixing box that adds that is used for preparing experimental suspension, is used for adjusting the variable frequency circulating pump of the circulation flow of experimental suspension and the buffer tank that is used for simulating two return circuit heating container that connect gradually via metal pipeline, still include the online conductance table that is used for monitoring the conductivity of experimental suspension, be used for monitoring the pH value of experimental suspension on-line pH meter, be used for on-line monitoring the online turbidity appearance and the first circulation path control butterfly valve of the turbidity change of experimental suspension in continuous cycle process, the online conductance table with online pH meter sets up on the pipeline between variable frequency circulating pump and the mixing medicine mixing box, the online turbidity appearance sets up the buffer tank with add between the medicine mixing box and be close to on the pipeline of buffer tank one side, the first circulation path control butterfly valve is arranged between the buffer tank and the dosing mixing box and is close to a pipeline on one side of the dosing mixing box.
The utility model provides an in effect aassessment test device for simulating nuclear power station dispersant is used, still including being used for the heating the heat transfer module and the second circulation path control butterfly valve of experimental suspension, heat transfer module's one end connect in the variable frequency circulating pump with on the pipeline between the medicine mixing box, the other end warp second circulation path control butterfly valve connect in the buffer tank with on the pipeline between the medicine mixing box.
The utility model provides an among the effect aassessment test device for simulating nuclear power station dispersant is used, heat exchange module adopts the sleeve pipe heat transfer, and the temperature control scope is 20 ~ 85 ℃.
The utility model provides an in the effect aassessment test device for simulating nuclear power station dispersant is used, still including connect in add medicine mixing box bottom with the drainage module of buffer tank bottom.
The utility model provides an among the effect aassessment test device for simulating nuclear power station dispersant is used, be provided with electric stirring device in the medicine mixing box.
The utility model provides an among the effect evaluation test device for simulating nuclear power station dispersant is used, variable frequency circulating pump's pump flow control range is 0 ~ 16m3/h。
The utility model provides an among the effect aassessment test device for simulating nuclear power station dispersant is used, the glass sight glass is installed to the jar body bilateral symmetry of buffer tank.
Implement the embodiment of the utility model provides a, following beneficial effect has: the utility model provides an effect evaluation test device for simulating nuclear power station dispersant application, iron oxide and dispersant which are prepared with certain concentration are mixed evenly in a dosing mixing box, ammonia water is added simultaneously to adjust the pH of mixed liquid, and the conductivity and the pH of the mixed liquid are monitored on line; after the pH and the conductance meet the test requirements, injecting the mixture into a test loop through a circulating pump, establishing a second circulation through a manual valve, starting circulation of the test mixed liquid, and evaluating the dispersion effect of the dispersing agent on oxide particles by continuously detecting the turbidity of the mixed liquid, wherein the slower the turbidity change is, the better the dispersion effect is; in addition, the dispersing effect of the dispersing agent at different temperatures and different flow rates can be evaluated by setting the temperature of the heat exchange module and adjusting the frequency of the circulating pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a process flow diagram of an effect evaluation test apparatus for simulating application of a dispersant in a nuclear power plant according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the drawings. The 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 is noted that the terms "equal," "same," "simultaneously," or other similar terms are not limited to the absolute equality or equality in mathematical terms, but may be similar in engineering sense or within an acceptable error range when practicing the claims of this patent. The term "coupled" or "connecting" is intended to encompass not only the direct connection of two entities, but also the indirect connection via other entities with beneficial and improved effects. The term "and/or" includes a combination of a plurality of related items and one of the plurality of related items.
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.
The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named as a second component, and similarly, a second component may also be named as a first component, without departing from the scope of the present invention.
For better understanding of the technical solutions of the present invention, the following detailed descriptions will be made in conjunction with the drawings and the specific embodiments of the present invention, and it should be understood that the specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present invention, but not limitations of the technical solutions of the present invention, and the technical features in the embodiments and examples of the present invention can be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of an effect evaluation test apparatus for simulating application of a dispersant in a nuclear power plant according to an embodiment of the present invention. As shown in FIG. 1, the utility model provides an effect evaluation test device for simulating nuclear power station dispersant application includes the chemical adding mixing box 1 that is used for preparing test suspension, the variable frequency circulating pump 4 that is used for adjusting the circulation flow of test suspension and the buffer tank 5 that is used for simulating two return circuit heating container that connect gradually via metal pipeline, still includes online conductance table 2 that is used for monitoring the conductivity of test suspension, the online pH meter 3 that is used for monitoring the pH value of test suspension, the online turbidity meter 7 that is used for online monitoring the turbidity change of test suspension in the continuous circulation process and first circulation path control butterfly valve 8, online conductance table 2 and online pH meter 3 set up on the pipeline between variable frequency circulating pump 4 and chemical adding mixing box 1, online turbidity meter 7 sets up on the pipeline between buffer tank 5 and the chemical adding mixing box 1 and near buffer tank 5 one side, the first circulation path control butterfly valve 8 is arranged on a pipeline which is arranged between the buffer tank 5 and the dosing mixing box 1 and is close to one side of the dosing mixing box 1.
Further, the device also comprises a heat exchange module 10 for heating the test suspension and a second circulation path control butterfly valve 9, wherein one end of the heat exchange module 10 is connected to a pipeline between the variable frequency circulating pump 4 and the chemical adding mixing box 1, and the other end of the heat exchange module is connected to a pipeline between the buffer tank 5 and the chemical adding mixing box 1 through the second circulation path control butterfly valve 9.
Further, the chemical adding and mixing tank also comprises a drainage module 6 connected to the bottom of the chemical adding and mixing tank 1 and the bottom of the buffer tank 5.
Specifically, the dosing and mixing tank 1 was used for preparing a test suspension, and had a volume of 250L and an electric stirring device provided inside.
Specifically, the online conductivity meter 2 and the online pH meter 3 are arranged between the dosing mixing tank and the variable frequency circulating pump and used for monitoring whether the pH and the conductivity of the test suspension meet the test requirements.
Specifically, the variable-frequency circulating pump 4 is arranged at the downstream of the dosing mixing box, and the pump flow adjusting range is 0-16 m3And/h, adjusting the circulating flow of the test suspension, and evaluating the dispersing effect of the dispersing agent at different flow rates.
Specifically, the buffer tank 5 is arranged at the downstream of the heat exchange module, the volume of the tank body is 50L, and glass sight glasses are symmetrically arranged on two sides of the tank body and used for simulating a two-loop heating container to realize different flow velocity distribution of a circulation loop.
In particular, an on-line turbidity meter 7 is located immediately downstream of the buffer tank for on-line monitoring of the turbidity change during the continuous circulation of the test suspension.
Specifically, a first circulation path control butterfly valve 8 and a second circulation path control butterfly valve 9 are connected to the circulating pump dosing mixing box and the front end through two metal pipes respectively, and are used for establishing backflow to the dosing mixing box or internal circulation respectively.
Specifically, the heat exchange module 10 adopts sleeve heat exchange for heating test suspension, the inner diameter of a heated pipeline is divided into 4cm and 10cm, the temperature control range is 20-85 ℃, and the heat exchange module is used for evaluating the influence of temperature on the dispersion effect of the dispersing agent.
The utility model provides a concrete working process for simulating effect evaluation test device that nuclear power station dispersant used as follows:
1. uniformly mixing the prepared ferric oxide with a certain concentration and a dispersing agent in a dosing mixing box, simultaneously adding ammonia water to adjust the pH value of the mixed solution, and monitoring the conductivity and the pH value of the test mixed solution on line.
2. When the pH and the conductance meet the test requirements, the test mixture is injected into a test loop through a circulating pump, internal circulation is established through a manual valve, and the test mixture starts to circulate.
3. The dispersion effect of the dispersant on the oxide particles is evaluated by continuously detecting the turbidity of the mixed solution, and the slower the turbidity changes, the better the dispersion effect.
4. The dispersing effect of the dispersing agent at different temperatures and different flow rates can be evaluated by setting the temperature of the heat exchange module and adjusting the frequency of the circulating pump.
The utility model provides an effect evaluation test device that simulation nuclear power station dispersant was used, including adding medicine mixing box, variable frequency circulating pump, heat transfer module, buffer tank, subassembly such as drainage module, all subassemblies pass through metal pipeline, valve connection, form circulation circuit, install online turbidity appearance, online pH meter on the return circuit, online electric conductance table, all subassemblies, instrument are controlled through the PLC system. Therefore, the dispersing effect of the dispersing agent can be dynamically evaluated, and the method is closer to the practical application working condition; the influence of temperature and flow rate on the dispersing effect of the dispersing agent can be researched; the pipe diameter of the test loop is changed, and different flow field distributions can be simulated; the automation degree is high, and the automatic evaluation of the dispersion effect can be realized.
The effect evaluation test device for simulating the application of the dispersant in the nuclear power station provided by the utility model is introduced in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (7)
1. An effect evaluation test device for simulating dispersant application in a nuclear power plant, which is characterized by comprising a dosing and mixing tank (1) for preparing test suspension, a variable frequency circulating pump (4) for adjusting the circulating flow of the test suspension, a buffer tank (5) for simulating a two-loop heating container, an online conductivity meter (2) for monitoring the conductivity of the test suspension, an online pH meter (3) for monitoring the pH value of the test suspension, an online turbidity meter (7) for online monitoring the turbidity change of the test suspension in the continuous circulation process and a first circulating path control butterfly valve (8), which are sequentially connected through a metal pipeline, wherein the online conductivity meter (2) and the online pH meter (3) are arranged on a pipeline between the variable frequency circulating pump (4) and the dosing and mixing tank (1), on-line turbidity appearance (7) set up buffer tank (5) with add between medicine mixing box (1) and be close to on the pipeline of buffer tank (5) one side, first circulation path control butterfly valve (8) set up buffer tank (5) with add between medicine mixing box (1) and be close to on the pipeline of medicine mixing box (1) one side.
2. The effect evaluation test device for simulating dispersant application in nuclear power plant according to claim 1, further comprising a heat exchange module (10) for heating the test suspension and a second circulation path control butterfly valve (9), wherein one end of the heat exchange module (10) is connected to the pipeline between the variable frequency circulation pump (4) and the dosing mixing tank (1), and the other end is connected to the pipeline between the buffer tank (5) and the dosing mixing tank (1) via the second circulation path control butterfly valve (9).
3. The effect evaluation test device for simulating the application of the nuclear power plant dispersant according to claim 2, characterized in that the heat exchange module (10) adopts sleeve heat exchange, and the temperature control range is 20-85 ℃.
4. The effect evaluation test apparatus for simulating nuclear power plant dispersant application according to claim 1, further comprising a drain module (6) connected to the bottom of the dosing and mixing tank (1) and the bottom of the buffer tank (5).
5. The effect evaluation test device for simulating the application of the nuclear power plant dispersant according to claim 1, characterized in that an electric stirring device is arranged in the chemical feeding mixing tank (1).
6. The effect evaluation test device for simulating dispersant application in nuclear power plant according to claim 1, wherein the pump flow rate of the variable frequency circulating pump (4) is adjusted within a range of 0-16 m3/h。
7. The effect evaluation test device for simulating the application of the dispersant in the nuclear power plant as claimed in claim 1, wherein the tank body of the buffer tank (5) is symmetrically provided with glass sight glasses at two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915172.XU CN210427510U (en) | 2019-06-18 | 2019-06-18 | Effect evaluation test device for simulating application of nuclear power station dispersing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920915172.XU CN210427510U (en) | 2019-06-18 | 2019-06-18 | Effect evaluation test device for simulating application of nuclear power station dispersing agent |
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| Publication Number | Publication Date |
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| CN210427510U true CN210427510U (en) | 2020-04-28 |
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| CN201920915172.XU Active CN210427510U (en) | 2019-06-18 | 2019-06-18 | Effect evaluation test device for simulating application of nuclear power station dispersing agent |
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| CN (1) | CN210427510U (en) |
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