Circulation device for online monitoring and sampling of pure steam

Abstract

The present invention relates to a circulation device for online monitoring and sampling of pure steam, which comprises a sampler and a circulation pipe. The sampler comprises a shell, the interior of which is a hollow first cavity. A conductivity cell is arranged in the first cavity. The shell comprises a top and a bottom arranged opposite to each other. The top of the shell is used to pass pure steam or condensed water formed by pure steam. The conductivity cell is arranged toward the top to receive condensed water. The circulation device for online monitoring and sampling of pure steam can prevent the condensed water remaining in the conductivity cell and the first cavity from breeding microorganisms due to long-term shutdown, and prevent the conductivity probe from monitoring the conductivity of the residual condensed water and causing the equipment to alarm, so as to ensure that the monitored condensed water conductivity can well represent the purity of pure steam. In addition, the conductivity cell can be filled with condensed water in a relatively short time, so that the conductivity probe can obtain a stable indication in a relatively short time.

Description

Technical Field

[0001] The invention relates to the technical field of pure steam monitoring and sampling, and in particular to a circulation device for online monitoring and sampling of pure steam. Background Art

[0002] In the pharmaceutical production process, pure steam is also called clean steam or high-quality steam. The condensed water of pure steam needs to meet the requirements of the Chinese Pharmacopoeia for water for injection. Pure steam is mainly prepared by a pure steam generator. The main function of a pure steam generator is to continuously and stably distill raw water into pure steam that meets the requirements of the Pharmacopoeia.

[0003] The conductivity of pure steam is obtained through monitoring and sampling, and is used as data to judge the quality of pure steam. Pure steam is first condensed in the sampling condenser to form condensed water, which then flows into the sampler, and the condensed water is monitored and sampled in the sampler. Since the interior of the sampler is a large space cavity, the conductivity probe is directly set in the large space cavity to perform real-time conductivity monitoring. The sampling valve is set on the condensed water outflow pipe for offline sampling and detection. However, if the conductivity probe is directly set in the large space cavity, during the initial production or circulation stage of pure steam, the condensed water remaining in the large space cavity cannot be automatically discharged, and the conductivity will exceed the set value (the maximum value of the conductivity specified in the Chinese Pharmacopoeia is the set value), causing the equipment to alarm. Moreover, the condensed water flows slowly in the large space cavity, the condensed water is replaced slowly, and the monitored conductivity has errors, which cannot well characterize the purity of pure steam. Summary of the invention

[0004] Based on this, it is necessary to provide a circulation device for online monitoring and sampling of pure steam to address the above technical problems, so as to avoid the situation in which the conductivity probe monitors the conductivity of residual condensed water and its value exceeds the set value during the initial production or circulation stage of pure steam, causing the equipment to alarm. In addition, the stable conductivity value of the condensed water formed by pure steam can be read in a very short time, thereby ensuring the accuracy of the conductivity test of the condensed water and better characterizing the purity of the steam.

[0005] A circulation device for online monitoring and sampling of pure steam, comprising:

[0006] A sampler, the sampler comprising a shell, the interior of the shell is a hollow first cavity, a conductivity cell is arranged in the first cavity, the shell comprises a top and a bottom arranged opposite to each other, the top of the shell is used to pass pure steam or condensed water formed by pure steam; the conductivity cell is arranged toward the top to receive the condensed water, and a conductivity probe is arranged in the conductivity cell;

[0007] The sampler further comprises a circulation pipe, the bottom of the shell is connected to the starting end of the circulation pipe, and the end of the circulation pipe is connected to the condensed water outlet.

[0008] The technical solution is further described below:

[0009] In one embodiment, a first end cover and a second end cover are provided on the top of the shell, the first end cover and the second end cover are spaced apart, one side of the second end cover is arranged toward the conductivity cell, and the other side of the second end cover is arranged toward the first end cover, a condensate buffer chamber is formed between the first end cover and the second end cover, the end of the circulation pipe is connected to the condensate buffer chamber, and the condensate outlet is connected to the condensate buffer chamber.

[0010] In one embodiment, the circulation pipe is arranged inside the shell, the second end cover is provided with a first through hole, the end of the circulation pipe is passed through the first through hole, the first through hole is used to connect the first cavity and the condensate buffer cavity, and the condensate outlet is arranged on the first end cover.

[0011] In one of the embodiments, a first exhaust hole is further provided on the second end cover, and the first exhaust hole is connected to the condensate buffer chamber and the first cavity.

[0012] In one of the embodiments, a bottom cover is provided at the bottom of the shell, a second through hole is opened on the bottom cover, and the starting end of the circulation pipe is connected to the second through hole.

[0013] In one of the embodiments, a sampling valve is further provided at the bottom of the housing, and one end of the sampling valve can be connected to the first cavity through the second through hole.

[0014] In one of the embodiments, the pure steam online monitoring and sampling circulation device further comprises a pure steam condenser, wherein the pure steam condenser is arranged at the top of the sampler, a pure steam inlet is arranged at one end of the pure steam condenser away from the sampler, and a drainage tube is arranged at one end of the pure steam condenser facing the sampler, wherein the drainage tube passes through the first end cover and the second end cover in sequence and is inserted into the bottom of the conductivity cell.

[0015] In one embodiment, the pure steam condenser is a spiral tube heat exchanger, and a cooling water outlet and a cooling water inlet are provided on the pure steam condenser. The pure steam condenser includes a shell side and a tube side, and the two ends of the tube side are respectively connected to the pure steam inlet and the drainage pipe, and the two ends of the shell side are respectively connected to the cooling water outlet and the cooling water inlet.

[0016] In one of the embodiments, the cooling water outlet is arranged at an end of the pure steam condenser provided with the pure steam inlet, and the cooling water inlet is arranged at an end of the pure steam condenser facing the sampler.

[0017] In one embodiment, the pure steam condenser and the first end cover of the sampler are spaced apart, an air cooling cavity is formed between the pure steam condenser and the first end cover, and ventilation holes are provided on the side walls of the air cooling cavity.

[0018] The above-mentioned pure steam online monitoring and sampling circulation device has at least the following beneficial effects:

[0019] The circulation device for online monitoring and sampling of pure steam provided in this embodiment includes a sampler, and a conductivity cell is arranged in the sampler. When the circulation device for online monitoring and sampling of pure steam is turned on when the circulation device for online monitoring and sampling of pure steam has not been used for a long time, pure steam can be introduced into the sampler first, and the pure steam flows from the top to the bottom of the sampler, and then discharged through the circulation pipe and the condensed water outlet. In the process of introducing pure steam, the pure steam can purge the residual condensed water in the first cavity (including the conductivity cell), so that the condensed water is discharged from the condensed water outlet, so as to avoid the growth of microorganisms in the residual condensed water in the conductivity cell and the first cavity due to long-term shutdown. At the same time, by using pure steam to purge the residual condensed water in the first cavity, it is avoided that the conductivity probe monitors the conductivity of the residual condensed water and causes the equipment to alarm.

[0020] The working process of the circulation device for online monitoring and sampling of pure steam is as follows: first, condensed water of pure steam is introduced from the top of the sampler, and the condensed water falls into the conductivity cell, and when the conductivity cell is full, the condensed water will overflow into the first cavity until the first cavity is full of condensed water; then, under the action of water pressure, the condensed water enters the circulation pipe from the bottom of the shell, and the condensed water flows from the circulation pipe to the condensed water outlet and is discharged. In the above process, since the capacity of the conductivity cell is significantly smaller than that of the first cavity, the condensed water can quickly fill the conductivity cell and overflow, so that the condensed water in the conductivity cell is replaced quickly, ensuring that the monitored condensed water conductivity can well represent the purity of pure steam. In addition, the conductivity cell can be filled with condensed water in a shorter time, so that the conductivity probe can obtain a stable conductivity reading in a shorter time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a circulation device for online monitoring and sampling of pure steam provided in one embodiment of the present invention;

[0024] Figure 2 A schematic structural diagram of a circulation device for online monitoring and sampling of pure steam from another perspective provided by an embodiment of the present invention;

[0025] Figure 3 for Figure 2 The schematic diagram of the cross-sectional structure of the circulation device for online monitoring and sampling of pure steam along the AA line is shown.

[0026] Explanation of the reference numerals: 100, sampler; 110, shell; 111, top; 112, bottom; 120, first cavity; 121, conductivity cell; 130, first end cover; 131, condensate outlet; 140, second end cover; 141, first through hole; 142, first exhaust hole; 150, condensate buffer cavity; 160, bottom cover; 161, second through hole; 170, sampling valve; 180, conductivity probe; 190, circulation pipe; 191, starting end; 192, end end; 200, pure steam condenser; 211, pure steam inlet; 212, cooling water outlet; 213, cooling water inlet; 220, drainage pipe; 230, air cooling cavity; 231, vent. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0028] The present embodiment provides a circulation device for online monitoring and sampling of pure steam, which has the advantages of avoiding the situation in which the conductivity probe monitors the conductivity of residual condensed water and its value exceeds the set value during the initial production or circulation stage of pure steam, thereby causing an equipment alarm. In addition, the stable conductivity value of the condensed water can be read in a very short time, thereby ensuring the accuracy of the conductivity test of the condensed water and better characterizing the purity of the steam. This will be described in detail below in conjunction with the accompanying drawings.

[0029] In one embodiment, see Figure 1 and Figure 3 , Figure 1 A schematic diagram of the structure of a circulation device for online monitoring and sampling of pure steam provided by an embodiment of the present invention is shown; Figure 2 A schematic structural diagram of a circulation device for online monitoring and sampling of pure steam provided by an embodiment of the present invention from another angle is shown; Figure 3 Shows Figure 2 The schematic diagram of the cross-sectional structure of the circulation device for online monitoring and sampling of pure steam along the AA line is shown. A circulation device for online monitoring and sampling of pure steam includes a sampler 100. The sampler 100 also includes a circulation pipe 190. The sampler 100 includes a shell 110, and the interior of the shell 110 is a hollow first cavity 120. A conductivity cell 121 is arranged in the first cavity 120. The shell 110 includes a top 111 and a bottom 112 arranged opposite to each other. The top 111 of the shell 110 is used to pass pure steam or condensed water formed by pure steam. The conductivity cell 121 is arranged toward the top 111 to receive condensed water. The conductivity cell 121 is located at an upper position of the first cavity 120, that is, the distance from the conductivity cell 121 to the top 111 is less than the distance from the conductivity cell 121 to the bottom 112. The conductivity probe 180 is arranged in the conductivity cell 121. The bottom 112 of the housing 110 is connected to the starting end 191 of the circulation pipe 190. The end 192 of the circulation pipe 190 is connected to the condensed water outlet 131. Specifically, the conductivity probe 180 is installed on the outer wall of the sampler 100, and one end of the conductivity probe 180 extends into the conductivity cell 121 to monitor the conductivity of the condensed water in the conductivity cell 121.

[0030] Specifically, when the circulation device for online monitoring and sampling of pure steam is turned on when the circulation device for online monitoring and sampling of pure steam has not been used for a long time, pure steam can be first introduced into the sampler 100, and the pure steam flows from the top 111 to the bottom 112 of the sampler 100, and then discharged through the circulation pipe 190 and the condensed water outlet 131. In the process of introducing pure steam, the pure steam can purge the residual condensed water in the first cavity 120 (including the conductivity cell 121), so that the condensed water is discharged from the condensed water outlet 131, thereby preventing the residual condensed water in the conductivity cell 121 and the first cavity 120 from breeding microorganisms due to long-term shutdown. At the same time, by using pure steam to purge the residual condensed water, it is avoided that the conductivity probe 180 monitors the conductivity of the residual condensed water and causes the device to alarm.

[0031] The working process of the circulation device for online monitoring and sampling of pure steam is as follows: first, condensed water of pure steam is introduced from the top 111 of the sampler 100, and the condensed water falls into the conductivity cell 121. When the conductivity cell 121 is full, the condensed water overflows into the first cavity 120 until the first cavity 120 is full of condensed water; then, under the action of water pressure, the condensed water enters the circulation pipe 190 from the bottom 112 of the shell 110, and the condensed water flows from the circulation pipe 190 to the condensed water outlet 131 and is discharged. In the above process, since the capacity of the conductivity cell 121 is significantly smaller than that of the first cavity 120, the condensed water can quickly fill the conductivity cell 121 and overflow, so that the condensed water in the conductivity cell 121 is replaced quickly, ensuring that the monitored condensed water conductivity can well represent the purity of pure steam. In addition, the conductivity cell 121 can be filled with condensed water in a short time, so that the conductivity probe 180 can obtain a stable conductivity reading in a short time.

[0032] In one embodiment, see Figures 1 to 3 , the top 111 of the shell 110 is provided with a first end cover 130 and a second end cover 140. The first end cover 130 and the second end cover 140 are arranged at intervals. Specifically, the first end cover 130 and the second end cover 140 are arranged in parallel at intervals. One side of the second end cover 140 is arranged toward the conductivity cell 121. The other side of the second end cover 140 is arranged toward the first end cover 130. A condensate buffer chamber 150 is formed between the first end cover 130 and the second end cover 140. The end 192 of the circulation pipe 190 is connected to the condensate buffer chamber 150, and the condensate outlet 131 is connected to the condensate buffer chamber 150. Specifically, the second end cover 140 is provided with a first through hole 141. The first through hole 141 is used to connect the first cavity 120 and the condensate buffer chamber 150. The end 192 of the circulation pipe 190 is penetrated through the first through hole 141. The condensate outlet 131 is provided on the first end cover 130. When condensed water (or pure steam) is introduced into the first cavity 120, the condensed water first falls into the conductivity cell 121. When the conductivity cell 121 is full, the condensed water will overflow into the first cavity 120 until the first cavity 120 is full of condensed water. Since the condensed water is continuously introduced into the first cavity 120, the condensed water in the first cavity 120 is affected by the water pressure, so that the condensed water enters the circulation pipe 190 from the bottom 112 of the shell 110, and then flows from the circulation pipe 190 to the condensed water buffer chamber 150, and then is discharged from the condensed water outlet 131. In the above process, since the capacity of the conductivity cell 121 is significantly smaller than that of the first cavity 120, the condensed water can quickly fill the conductivity cell 121 and overflow, so that the condensed water in the conductivity cell 121 is replaced quickly, ensuring that the monitored condensed water conductivity can well represent the purity of the pure steam. In addition, the conductivity cell 121 can be filled with condensed water in a shorter time, so that the conductivity probe 180 can obtain a stable conductivity reading in a shorter time.

[0033] For further information, see Figures 1 to 3 , a first exhaust hole 142 is also provided on the second end cover 140. The first exhaust hole 142 connects the condensate buffer chamber 150 and the first cavity 120. Specifically, the first exhaust hole 142 and the first through hole 141 are arranged at intervals, and the depth direction of the first exhaust hole 142 and the first through hole 141 are both in the direction from the first end cover 130 to the second end cover 140. When the circulation device for online monitoring and sampling of pure steam is running for a long time, condensate is continuously introduced into the sampler 100, and a small amount of non-condensable gas formed by pure steam is also mixed in the condensate, which finally gathers at the top 111 of the shell 110, and enters the condensate buffer chamber 150 through the first exhaust hole 142, and then is discharged from the condensate outlet 131 on the first end cover 130. The discharge of non-condensable gas is conducive to avoiding a large deviation in the measured condensate conductivity value and improving the monitoring accuracy of the condensate conductivity.

[0034] In one embodiment, see Figures 1 to 3 , a bottom cover 160 is provided at the bottom 112 of the shell 110. A second through hole 161 is provided on the bottom cover 160. The starting end 191 of the circulation pipe 190 is connected to the second through hole 161. Further, a sampling valve 170 is also provided at the bottom 112 of the shell 110, and one end of the sampling valve 170 can be connected to the first cavity 120 through the second through hole 161. Specifically, the second through hole 161 is connected to the first cavity 120, and the condensed water flows from the first cavity 120 to the second through hole 161, and then flows from the second through hole 161 to two branch pipelines, one of which is the circulation pipe 190, and the other branch pipeline is the pipeline corresponding to the sampling valve 170. Among them, the sampling valve 170 has two functions: first, after the condensed water fills the first cavity 120, if the condensed water needs to be sampled and tested, the sampling valve 170 can be opened to sample the condensed water; second, when the pure steam online monitoring and sampling circulation device is not used for a long time, the sampling valve 170 can also be opened to drain the residual water in the first cavity 120 to avoid the growth of bacteria.

[0035] In one embodiment, see Figures 1 to 3, the circulation device for online monitoring and sampling of pure steam also includes a pure steam condenser 200. The pure steam condenser 200 is arranged at the top 111 of the sampler 100, and a pure steam inlet 211 is provided at one end of the pure steam condenser 200 away from the sampler 100. A drainage pipe 220 is provided at one end of the pure steam condenser 200 facing the sampler 100. The drainage pipe 220 passes through the first end cover 130 and the second end cover 140 in sequence and is inserted into the bottom 112 of the conductivity cell 121. Specifically, the pure steam condenser 200 is a spiral tube heat exchanger, and a cooling water outlet 212 and a cooling water inlet 213 are provided on the pure steam condenser 200. The pure steam condenser 200 includes a shell side and a tube side, and the two ends of the tube side are respectively connected to the pure steam inlet 211 and the drainage pipe 220, and the two ends of the shell side are respectively connected to the cooling water outlet 212 and the cooling water inlet 213. The drainage pipe 220 and the tube side of the pure steam condenser 200 are an integrated structure, and the heat of the pure steam in the tube side is absorbed by the cooling water in the shell side, so that the pure steam becomes condensed water. The condensed water then flows from the drainage pipe 220 to the conductivity cell 121 of the sampler 100, and when the conductivity cell 121 is full, the condensed water will overflow into the first cavity 120 until the first cavity 120 is filled with condensed water; since the condensed water continues to flow from the drainage pipe 220 to the sampler 100, the condensed water squeezed out of the first cavity 120 enters the circulation pipe 190 from the bottom 112 of the shell 110, and the condensed water flows from the circulation pipe 190 to the condensed water outlet 131 and is discharged. In the above process, since the capacity of the conductivity cell 121 is significantly smaller than that of the first cavity 120, the condensed water can quickly fill the conductivity cell 121 and overflow, so that the condensed water in the conductivity cell 121 is replaced quickly, ensuring that the monitored condensed water conductivity can well represent the purity of pure steam. In addition, the conductivity cell 121 can be filled with condensed water in a relatively short time, so that the conductivity probe 180 can obtain a stable reading in a relatively short time.

[0036] For further information, see Figures 1 to 3 The cooling water outlet 212 is provided at one end of the pure steam condenser 200 provided with the pure steam inlet 211, and the cooling water inlet 213 is provided at one end of the pure steam condenser 200 facing the sampler 100. In this way, the flow direction of the pure steam is opposite to the flow direction of the cooling water, and the cooling water absorbs the heat of the pure steam, so that the pure steam is condensed. The pure steam condenser 200 adopts a spiral tube heat exchanger, which is conducive to increasing the heat exchange area and improving the heat exchange efficiency.

[0037] In one embodiment, see Figures 1 to 3, the pure steam condenser 200 and the first end cover 130 of the sampler 100 are arranged at intervals. An air cooling chamber 230 is formed between the pure steam condenser 200 and the first end cover 130, and a vent 231 is provided on the side wall of the air cooling chamber 230. Specifically, the vent 231 connects the air cooling chamber 230 with the external environment, so that the external air can enter the air cooling chamber 230. Since the condensed water in the condensed water buffer chamber 150 is higher in temperature than the cooling water in the pure steam condenser 200, the setting of the air cooling chamber 230 separates the pure steam condenser 200 and the condensed water buffer chamber 150, thereby reducing the influence of the condensed water in the condensed water buffer chamber 150 on the temperature of the cooling water in the shell side of the spiral tube heat exchanger.

[0038] The circulation device for online monitoring and sampling of pure steam provided in this embodiment can prevent the residual condensed water in the conductivity cell 121 and the first cavity 120 from breeding microorganisms due to long-term shutdown. At the same time, by using pure steam to purge the residual condensed water in the first cavity 120, it is avoided that the conductivity probe 180 monitors the conductivity of the residual condensed water and causes the equipment alarm. The condensed water in the conductivity cell 121 is replaced quickly, ensuring that the monitored condensed water conductivity can well represent the purity of the pure steam. In addition, the conductivity cell 121 can be filled with condensed water in a relatively short time, so that the conductivity probe 180 can obtain a stable reading in a relatively short time.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A circulation device for online monitoring and sampling of pure steam, characterized in that: include: A sampler, the sampler comprising a shell, the interior of the shell is a hollow first cavity, a conductivity cell is arranged in the first cavity, the shell comprises a top and a bottom arranged oppositely, the top of the shell is used to pass pure steam or condensed water formed by pure steam; the conductivity cell is arranged toward the top, and is used to receive the condensed water, the capacity of the conductivity cell is significantly smaller than the first cavity, so that the condensed water quickly fills the conductivity cell and overflows into the first cavity, so that the condensed water in the conductivity cell is replaced faster; the conductivity cell is used to set a conductivity probe; The sampler is provided with a condensed water outlet, and the sampler also includes a circulation pipe. The bottom of the shell is connected to the starting end of the circulation pipe, and the end of the circulation pipe is connected to the condensed water outlet. The condensed water outlet is used to discharge the condensed water in the shell.

2. The pure steam online monitoring and sampling circulation device according to claim 1 is characterized in that: A first end cover and a second end cover are provided on the top of the shell, the first end cover and the second end cover are spaced apart, one side of the second end cover is arranged toward the conductivity cell, and the other side of the second end cover is arranged toward the first end cover, a condensate buffer chamber is formed between the first end cover and the second end cover, the end of the circulation pipe is connected to the condensate buffer chamber, and the condensate outlet is connected to the condensate buffer chamber.

3. The pure steam online monitoring and sampling circulation device according to claim 2 is characterized in that: The circulation pipe is arranged inside the shell, the second end cover is provided with a first through hole, the end of the circulation pipe is passed through the first through hole, the first through hole is used to connect the first cavity and the condensate buffer cavity, and the condensate outlet is arranged on the first end cover.

4. The pure steam online monitoring and sampling circulation device according to claim 2 is characterized in that: The second end cover is also provided with a first exhaust hole, and the first exhaust hole is connected with the condensed water buffer cavity and the first cavity.

5. The pure steam online monitoring and sampling circulation device according to any one of claims 1 to 4, characterized in that: A bottom cover is provided at the bottom of the shell, a second through hole is opened on the bottom cover, and the starting end of the circulation pipe is connected to the second through hole.

6. The pure steam online monitoring and sampling circulation device according to claim 5 is characterized in that: A sampling valve is also provided at the bottom of the housing, and one end of the sampling valve can be connected to the first cavity through the second through hole.

7. The pure steam online monitoring and sampling circulation device according to claim 2 is characterized in that: The pure steam online monitoring and sampling circulation device also includes a pure steam condenser, which is arranged at the top of the sampler, and a pure steam inlet is arranged at one end of the pure steam condenser away from the sampler, and a drainage tube is arranged at one end of the pure steam condenser facing the sampler, and the drainage tube passes through the first end cover and the second end cover in sequence and is inserted into the bottom of the conductivity cell.

8. The pure steam online monitoring and sampling circulation device according to claim 7, characterized in that: The pure steam condenser is a spiral tube heat exchanger, and is provided with a cooling water outlet and a cooling water inlet. The pure steam condenser comprises a shell side and a tube side, and both ends of the tube side are respectively connected to the pure steam inlet and the drainage pipe, and both ends of the shell side are respectively connected to the cooling water outlet and the cooling water inlet.

9. The pure steam online monitoring and sampling circulation device according to claim 8, characterized in that: The cooling water outlet is arranged at one end of the pure steam condenser provided with the pure steam inlet, and the cooling water inlet is arranged at one end of the pure steam condenser facing the sampler.

10. The pure steam online monitoring and sampling circulation device according to claim 7, characterized in that: The pure steam condenser and the first end cover of the sampler are spaced apart from each other, an air cooling cavity is formed between the pure steam condenser and the first end cover, and a vent hole is provided on a side wall of the air cooling cavity.

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