Nuclear power plant bulk chemical reagent sampling system

Abstract

The utility model discloses a bulk chemical reagent sampling system for a nuclear power plant. The bulk chemical reagent sampling system comprises an upper accommodating cavity, a lower accommodating cavity, a water source, a reagent input device and a reagent storage tank, according to the nuclear power plant bulk chemical reagent sampling system, fresh reagents are cached by arranging the upper containing cavity, waste liquid treated by the upper containing cavity is contained by the lower containing cavity, the reagents are sampled through the sampling pipeline, and by arranging the reagent introduction pipeline and the reagent output pipeline, sampling of the reagents is conducted in the sampling device all the time; the reagent opening time is shortened, harmful substances such as acid mist generated by the reagent are prevented from hurting operators, the industrial safety risk of sampling work is reduced, and meanwhile the working efficiency and the sampling accuracy are improved. A water source and a water inlet pipeline are further arranged so that the upper containing cavity can be cleaned conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant chemical sampling technical field especially relates to a kind of bulk chemical reagent sampling system of nuclear power plant. BACKGROUND

[0002] For a long time, the sampling analysis work of bulk chemical reagent has been one of the high-risk tasks in the chemical profession of nuclear power plant, especially involves strong volatile reagent such as hydrochloric acid, easy to produce acid mist, these reagents exist burn risk to personnel, and great disturbance is brought to sampling work.Currently, this work mainly relies on manual sampling, which not only exists personnel injury risk caused by acid mist, but also affects work efficiency, and it is difficult to guarantee the accuracy of sampling. Therefore, how to effectively reduce the industrial safety risk in this process, improve sampling efficiency and accuracy, has become a problem to be solved. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a kind of bulk chemical reagent sampling system of nuclear power plant, it includes upper containing cavity, lower containing cavity, water source, reagent input device and reagent storage tank;

[0004] The reagent input device is connected with the upper containing cavity by reagent inlet pipeline, and is used to inject reagent into the upper containing cavity;

[0005] The water source is connected with the upper containing cavity by water inlet pipeline, and is used to inject water into the upper containing cavity;

[0006] The lower containing cavity is located below the upper containing cavity, and the lower containing cavity is connected with the upper containing cavity by intermediate isolation valve, and is used to contain the waste liquid treated by the upper containing cavity;

[0007] The reagent storage tank is connected with the upper containing cavity by reagent output pipeline, and is used to contain the reagent flowing out of the upper containing cavity, and sampling pipeline is connected on the reagent output pipeline.

[0008] In some embodiments, water inlet control valve is provided on the water inlet pipeline, and the water inlet control valve is used to control the opening and closing state of water into the upper containing cavity.

[0009] In some embodiments, reagent inlet control valve is provided on the reagent inlet pipeline, and the reagent inlet control valve is used to control the opening and closing state of reagent of reagent input device into the upper containing cavity.

[0010] In some embodiments, the upper containing cavity is also connected with exhaust pipeline, and exhaust control valve is provided on the exhaust pipeline, and the exhaust control valve is used to control the opening and closing state of gas discharge in the upper containing cavity.

[0011] In some embodiments, the sampling pipeline is provided with a sampling control valve for controlling the flow of the reagent to be sampled.

[0012] In some embodiments, the reagent output pipeline is provided with a reagent output control valve between the sampling pipeline and the reagent storage tank, for controlling the flow of the reagent from the upper holding cavity to the reagent storage tank.

[0013] In some embodiments, the lower holding cavity is connected with a discharge pipeline provided with a discharge control valve for controlling the discharge of waste liquid from the lower holding cavity.

[0014] In some embodiments, the bulk chemical reagent sampling system for nuclear power plants further comprises a base for supporting the lower holding cavity.

[0015] In some embodiments, the reagent input device is a reagent slot car or a reagent storage tank.

[0016] In some embodiments, the upper holding cavity and the lower holding cavity have the same volume.

[0017] The bulk chemical reagent sampling system for nuclear power plants has the following advantages: the upper holding cavity is provided to buffer fresh reagent, the lower holding cavity is provided to hold waste liquid treated by the upper holding cavity, the sampling pipeline is provided to sample the reagent, the reagent input pipeline and the reagent output pipeline are provided to make the sampling of the reagent always in the sampling device, reduce the opening time of the reagent, avoid the harm of harmful substances such as acid mist generated by the reagent to the operator, reduce the industrial safety risk of the sampling work, improve the work efficiency and sampling accuracy, and the water source and the water inlet pipeline are provided to facilitate the cleaning of the upper holding cavity. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the present application, the following will further illustrate the present application with reference to the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the bulk chemical reagent sampling system for nuclear power plants in some embodiments of the present application.

[0020] Explanation of figure symbols:

[0021] 1. upper holding cavity;

[0022] 2. lower receiving chamber; 21. discharge line; 22. discharge control valve;

[0023] 3. water source; 31. water inlet line; 32. water passage control valve;

[0024] 4. reagent input device; 41. reagent passage line; 42. reagent passage control valve;

[0025] 5. reagent storage tank; 51. reagent output line; 52. sampling line; 53. sampling control valve; 54. reagent output control valve;

[0026] 6. intermediate isolation valve;

[0027] 7. exhaust line; 71. exhaust control valve;

[0028] 8. base. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the present technical solution, and do not indicate that the devices or elements referred to must have a particular direction, therefore, it cannot be understood as a limitation on the present application.

[0030] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Please refer toFigure 1 The utility model discloses a kind of bulk chemical reagent sampling systems of nuclear power plant, it includes upper containing cavity 1, lower containing cavity 2, water source 3, reagent input device 4 and reagent storage tank 5.The reagent input device 4 is connected with upper containing cavity 1 by reagent inlet pipeline 41, and it is used to inject reagent for upper containing cavity 1;Water source 3 is connected with upper containing cavity 1 by water inlet pipeline 31, and it is used to inject water for upper containing cavity 1;Lower containing cavity 2 is located below upper containing cavity 1, and lower containing cavity 2 is connected with upper containing cavity 1 by intermediate isolation valve 6, and it is used to contain the waste liquid after being treated by upper containing cavity 1;Reagent storage tank 5 is connected with upper containing cavity 1 by reagent output pipeline 51, and it is used to contain reagent that flows out of upper containing cavity 1, and sampling pipeline 52 is connected on reagent output pipeline 51.

[0032] Specifically, the bulk chemical reagent of the nuclear power plant can be hydrochloric acid or other chemical reagents, which can produce harmful substances such as acid mist to harm the operators. If manual sampling of the bulk chemical reagent of the nuclear power plant is adopted, there is an industrial safety risk in sampling work, and the work efficiency of the operators is not high, and the sampling accuracy is insufficient. In the embodiment, the upper containing cavity 1 is used to buffer fresh reagent, the intermediate isolation valve 6 is used to isolate the upper containing cavity 1 and the lower containing cavity 2 to prevent the liquids in the two from mixing. The lower containing cavity 2 can contain the waste liquid after being treated by the upper containing cavity 1, such as wastewater, reagent waste liquid and other sundries after being cleaned by the upper containing cavity 1. The water source 3 can be a system for providing water in the nuclear power plant, which can provide water for the upper containing cavity 1 to clean, and the water inlet pipeline 31 is connected to the side wall of the upper containing cavity 1. The reagent input device 4 can provide fresh reagent for the upper containing cavity 1, and the reagent inlet pipeline 41 is connected to the side wall of the upper containing cavity 1. The sampling pipeline 52 is used to sample the reagent in the upper containing cavity 1. In addition, the water source 3 can be provided by the SEP system of the nuclear power plant, which is a water system of the nuclear power plant.

[0033] Understandably, the bulk chemical reagent sampling system of the nuclear power plant buffers fresh reagent by setting the upper containing cavity 1, contains the waste liquid after being treated by the upper containing cavity 1 by the lower containing cavity 2, samples the reagent by the sampling pipeline 52, and makes the sampling of the reagent always in the sampling device by setting the reagent inlet pipeline 41 and the reagent output pipeline 51, reduces the opening time of the reagent, avoids the harm of harmful substances such as acid mist generated by the reagent to the operators, reduces the industrial safety risk of sampling work, and improves the work efficiency and sampling accuracy. The water source 3 and the water inlet pipeline 31 are also provided to facilitate the cleaning of the upper containing cavity 1.

[0034] The reagent input device 4 is a reagent tank truck or a reagent storage tank, the reagent input pipeline 41 can be a hose, the reagent input pipeline 41 can be made of plastic material, the plastic material can be PVC material, the PVC material has good acid resistance, alkali resistance, corrosion resistance, and high strength and durability. In actual operation, the reagent input pipeline 41 can be connected with the reagent tank truck or the reagent storage tank, so that the reagent tank truck or the reagent storage tank can input reagent into the upper containing cavity 1.

[0035] The volume of the upper containing cavity 1 and the lower containing cavity 2 is the same, specifically, the volume of the upper containing cavity 1 and the lower containing cavity 2 is 2L, in other embodiments, the volume of the upper containing cavity 1 and the lower containing cavity 2 can be set according to actual needs, which is not limited here. The upper containing cavity 1 and the lower containing cavity 2 can be made of stainless steel material. Because the stainless steel material has good rigidity and hardness, and is corrosion resistant and has long service life, it can ensure the stability of the upper containing cavity 1 and the lower containing cavity 2 during use.

[0036] Further, the water inlet pipeline 31 is provided with a water inlet control valve 32, which can be an electric valve or a manual valve, and the water inlet control valve 32 is specifically used to control the opening and closing state of water entering the upper containing cavity 1. The reagent input pipeline 41 is provided with a reagent input control valve 42, which is used to control the opening and closing state of the reagent of the reagent input device 4 entering the upper containing cavity 1. The sampling pipeline 52 is provided with a sampling control valve 53, and the sampling control valve 53 is used to control the opening and closing state of the flow of the reagent to be sampled. The reagent output pipeline 51 is provided with a reagent output control valve 54, which is located between the sampling pipeline 52 and the reagent storage tank 5, and the reagent output control valve 54 is used to control the opening and closing state of the reagent flowing from the upper containing cavity 1 to the reagent storage tank 5.

[0037] In addition, the upper containing cavity 1 is also connected with an exhaust pipeline 7, and the exhaust pipeline 7 is provided with an exhaust control valve 71. The exhaust pipeline 7 is specifically connected to the top of the upper containing cavity 1, and is used to balance the air pressure in the upper containing cavity 1, and the exhaust control valve 71 is used to control the opening and closing state of the gas discharge in the upper containing cavity 1.

[0038] The lower containing cavity 2 is connected with a discharge pipeline 21, and the discharge pipeline 21 is provided with a discharge control valve 22. The discharge pipeline 21 is specifically connected to the bottom side wall of the lower containing cavity 2, and is used to empty the waste liquid in the lower containing cavity 2 or the residual reagent in the entire container, and the discharge control valve 22 is used to control the opening and closing state of the discharge of the waste liquid in the lower containing cavity 2.

[0039] The nuclear power plant bulk chemical reagent sampling system further comprises a base 8 for supporting the lower containing cavity 2, which can be a metal base, and can be the base 8 of the entire nuclear power plant bulk chemical reagent sampling system, which can be fixed on the ground by fasteners such as bolts to stabilize the lower containing cavity 2 and prevent it from tipping over.

[0040] In some embodiments, a liquid level sensor can be provided in the upper containing cavity 1 and the lower containing cavity 2 to measure the liquid level position in the upper containing cavity 1 and the lower containing cavity 2.

[0041] The specific working process of the nuclear power plant bulk chemical reagent sampling system is as follows:

[0042] 1. Connect the upper containing cavity 1 with the water source 3 by the water inlet pipeline 31 to clean the upper containing cavity 1 and the lower containing cavity 2 with water;

[0043] 2. Connect the upper containing cavity 1 with the reagent input device 4 by the reagent inlet pipeline 41, connect the upper containing cavity 1 with the reagent storage tank 5 by the reagent outlet pipeline 51, and connect the exhaust pipeline 7, the discharge pipeline 21 and the sampling pipeline 52;

[0044] 3. Open the exhaust control valve 71 and the reagent inlet control valve 42 to allow the reagent to enter the upper containing cavity 1, and close the reagent inlet control valve 42 when the reagent reaches 2 / 3 of the position of the upper containing cavity 1, and then open the intermediate isolation valve 6 to allow the waste liquid to be discharged into the lower containing cavity 2, and then close the intermediate isolation valve 6, and the waste liquid in the lower containing cavity 2 is discharged through the discharge pipeline 21;

[0045] 4. Open the reagent inlet control valve 42 again, and close it when the reagent completely floods the sampling pipeline 52, then open the sampling control valve 53 to sample the reagent, and close the sampling control valve 53 after sampling, and close the exhaust control valve 71;

[0046] 5. After the sampling is qualified, open the reagent inlet control valve 42 and the reagent outlet control valve 54 to unload the bulk chemical reagent from the reagent input device 4 into the reagent storage tank 5.

[0047] In summary, the nuclear power plant bulk chemical reagent sampling system can avoid the risk of acid mist injury caused by sampling of hydrochloric acid and other chemical reagents, and improve work efficiency. Not only for sampling of reagents, but also for loading and unloading of bulk reagents from the reagent input device 4, and for safe discharge of bulk reagents.

[0048] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent scope; it should be pointed out that for ordinary skilled person in the art, the above technical features can be freely combined without departing from the concept of the utility model, and a number of modifications and improvements can be made, which belong to the protection scope of the utility model; therefore, any equivalent transformation and modification within the scope of the utility model patent claim should belong to the scope of the utility model patent claim.

Claims

1. A bulk chemical sampling system for a nuclear power plant, characterized by, The device comprises an upper accommodating cavity (1), a lower accommodating cavity (2), a water source (3), a reagent input device (4) and a reagent storage tank (5); The reagent input device (4) is connected with the upper accommodating cavity (1) through a reagent input pipeline (41) and is used for injecting reagent into the upper accommodating cavity (1); The water source (3) is connected with the upper accommodating cavity (1) through a water inlet pipeline (31) and is used for injecting water into the upper accommodating cavity (1); The lower accommodating cavity (2) is located below the upper accommodating cavity (1) and is connected with the upper accommodating cavity (1) through an intermediate isolation valve (6) and is used for accommodating the treated waste liquid of the upper accommodating cavity (1); The reagent storage tank (5) is connected with the upper accommodating cavity (1) through a reagent output pipeline (51) and is used for accommodating the reagent flowing out of the upper accommodating cavity (1), and the reagent output pipeline (51) is connected with a sampling pipeline (52).

2. The bulk chemical sampling system for a nuclear power plant of claim 1, wherein, The water inlet pipeline (31) is provided with a water inlet control valve (32) for controlling the opening and closing of the water inlet into the upper accommodating cavity (1).

3. The bulk chemical sampling system for a nuclear power plant of claim 1, wherein, The reagent input pipeline (41) is provided with a reagent input control valve (42) for controlling the opening and closing of the reagent input into the upper accommodating cavity (1) from the reagent input device (4).

4. The bulk chemical sampling system for a nuclear power plant of claim 1, wherein, The upper accommodating cavity (1) is further connected with an exhaust pipeline (7) provided with an exhaust control valve (71) for controlling the opening and closing of the gas exhaust in the upper accommodating cavity (1).

5. The bulk chemical sampling system of claim 1, wherein, The sampling pipeline (52) is provided with a sampling control valve (53) for controlling the opening and closing of the reagent flow for sampling.

6. The bulk chemical sampling system of claim 5, wherein, The reagent output pipeline (51) is provided with a reagent output control valve (54) located between the sampling pipeline (52) and the reagent storage tank (5) for controlling the opening and closing of the reagent flow from the upper accommodating cavity (1) to the reagent storage tank (5).

7. The bulk chemical sampling system of claim 1, wherein, The lower accommodating cavity (2) is connected with a discharge pipeline (21) provided with a discharge control valve (22) for controlling the opening and closing of the waste liquid discharge of the lower accommodating cavity (2).

8. The bulk chemical sampling system of claim 1, wherein, The nuclear power plant bulk chemical reagent sampling system further comprises a base (8) for supporting the lower accommodating cavity (2).

9. The bulk chemical sampling system of claim 1, wherein, The reagent input device (4) is a reagent receiving slot vehicle or a reagent storage tank.

10. The bulk chemical sampling system for a nuclear power plant of claim 1, wherein, The volumes of the upper accommodating cavity (1) and the lower accommodating cavity (2) are the same.

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