CN220270923U - Thermal power generation system and steam-water sampling recovery system thereof - Google Patents

Abstract

The present disclosure relates to a thermal power generation system and a steam-water sampling recovery system thereof, wherein the steam-water sampling recovery system comprises a first sampling pipeline, a second sampling pipeline, a recovery water tank and a three-way valve; the inlet of the first sampling pipeline and the A port of the three-way valve are both used for being communicated with a steam-water sampling port of the thermal generator set, and the outlet of the first sampling pipeline is used for being communicated with the inlet of the steam-water analysis instrument; an inlet of the second sampling pipeline is communicated with a port B of the three-way valve, an outlet of the second sampling pipeline is communicated with the first drainage pit, and a manual sampling port is arranged on the second sampling pipeline; the inlet of the recovery pipeline is communicated with the C port of the three-way valve, and the outlet of the recovery pipeline is communicated with the inlet of the recovery water tank. The steam-water sampling and recycling system can recycle and recycle the redundant sample water after the collection and analysis are finished, so that the waste of resources is avoided, and the cost is saved.

Description

Thermal power generation system and steam-water sampling recovery system thereof

Technical Field

The disclosure relates to the technical field of steam-water recovery of thermal power plants, in particular to a thermal power generation system and a steam-water sampling recovery system thereof.

Background

Because the thermal generator set carries out energy conversion power generation by means of steam-water circulation, the quality of the steam-water is closely related to the safety and efficiency of equipment, and therefore the steam-water quality of the thermal generator set needs to be continuously sampled for 24 hours during normal operation of the thermal generator set. Once a certain steam-water index is found out not to be in a specified range, corresponding discharging or dosing measures are needed to be adopted immediately for adjustment, so that the quality of the steam-water is always in a specified value, and in order to ensure that the quality of the current steam-water can be monitored in real time, the steam-water is always in a flowing acquisition state.

Because the unit can be unavoidable in normal operation and produce the soda loss, so the unit needs to be replenished new demineralized water again, and demineralized water heating deoxidization cost is higher, and the unnecessary sample water after being gathered and analyzed in the normal operation is the demineralized water after deoxidization and chemical treatment, and its quality is usually higher, and will be used as industrial waste water after this demineralized water is directly discharged to the drainage pit, has caused the waste of resource.

Disclosure of Invention

The utility model aims at providing a thermal power generation system and catch water sampling recovery system thereof, this catch water sampling recovery system can retrieve and cyclic utilization to the unnecessary sample water after the collection analysis finishes, has avoided the waste of resource to save the cost.

In order to achieve the above object, the present disclosure provides a steam-water sampling recovery system of a thermal power generation system, including a first sampling pipe, a second sampling pipe, a recovery water tank, and a three-way valve;

the inlet of the first sampling pipeline and the A port of the three-way valve are both used for being communicated with a steam-water sampling port of the thermal generator set, and the outlet of the first sampling pipeline is used for being communicated with the inlet of a steam-water analysis instrument;

the inlet of the second sampling pipeline is communicated with the port B of the three-way valve, the outlet of the second sampling pipeline is communicated with the first drainage pit, and a manual sampling port is arranged on the second sampling pipeline;

the inlet of the recovery pipeline is communicated with the C port of the three-way valve, and the outlet of the recovery pipeline is communicated with the inlet of the recovery water tank.

Optionally, the three-way valves are multiple, and an A port of each three-way valve is communicated with the corresponding steam-water sampling port;

the plurality of first sampling pipelines are arranged, and the inlet of each first sampling pipeline is used for being communicated with the corresponding steam-water sampling port;

the second sampling pipeline comprises a first collecting pipe and a plurality of first branch pipes, the manual sampling ports are arranged on the first branch pipes, the inlet of each first branch pipe is communicated with the corresponding port B of the three-way valve, the outlet of each first branch pipe is communicated with the first collecting pipe, and the outlet of the first collecting pipe is used for being communicated with the first drainage pit;

the recovery pipeline comprises a second collecting pipe and a plurality of second branch pipes, wherein the inlet of each second branch pipe is communicated with the corresponding C port of the three-way valve, the outlet of each second branch pipe is communicated with the second collecting pipe, and the outlet of the second collecting pipe is communicated with the inlet of the recovery water tank.

Optionally, the second collecting pipe is provided with a water quality detection device and a first electromagnetic valve, and the first electromagnetic valve is positioned at the downstream of the water quality detection device.

Optionally, the water quality detection device comprises a conductivity meter and a Ph value detector.

Optionally, the steam-water sampling recovery system further comprises a first discharge pipeline and a second electromagnetic valve arranged on the first discharge pipeline, an inlet of the first discharge pipeline is connected to a part of the second collecting pipe between the water quality detection device and the first electromagnetic valve, and an outlet of the first discharge pipeline is used for being communicated with a second drainage pit.

Optionally, the steam-water sampling recovery system further comprises a water conveying pipeline and a water pump arranged on the water conveying pipeline, wherein an inlet of the water conveying pipeline is communicated with an outlet of the recovery water tank, and an outlet of the water conveying pipeline is used for being communicated with a condensation water tank of the thermal generator set.

Optionally, the water delivery pipeline is provided with a one-way valve, and the one-way valve is arranged at the downstream of the water pump.

Optionally, the recovery water tank is further communicated with a liquid level gauge, one end of the liquid level gauge is communicated with the upper portion of the recovery water tank, the other end of the liquid level gauge is communicated with the lower portion of the recovery water tank, and the liquid level gauge is used for monitoring the liquid level height in the recovery water tank.

Optionally, the steam-water sampling recovery system further comprises an overflow pipeline and a second discharge pipeline, wherein an inlet of the overflow pipeline is communicated with an overflow port of the recovery water tank, an outlet of the overflow pipeline is communicated with the second drainage pit, an inlet of the second discharge pipeline is communicated with a drain outlet of the recovery water tank, an outlet of the second discharge pipeline is communicated with the second drainage pit, and a switch valve is arranged on the second discharge pipeline.

According to a second aspect of the present disclosure, there is also provided a thermal power generation system including a thermal power generation unit and the steam-water sampling recovery system described above.

Through the technical scheme, in the process of carrying out steam-water sampling detection on the thermal generator set, the first sampling pipeline is used for collecting a certain steam-water sample, the steam-water sample can flow to the steam-water analysis instrument through the first sampling pipeline, the quality of the steam-water sample is analyzed by the steam-water analysis instrument, in order to ensure the quality of the steam-water sample capable of being monitored in real time, the steam-water analysis instrument is used for continuously collecting and analyzing the steam-water sample, and therefore the steam-water sample can be directly introduced into the first sampling pipeline and is collected and analyzed by the steam-water analysis instrument. In the process, redundant steam-water samples can be used as wastewater to enter the second sampling pipeline and be discharged into the first drainage pit through the second sampling pipeline, and in order to avoid the problem of the steam-water analysis instrument, the steam-water sample analysis result is wrong, samples in the second sampling pipeline are sampled through a manual sampling port arranged on the second sampling pipeline, and then the samples are taken out of a laboratory for detection and analysis, so that the accuracy of the sample detection result is ensured.

Because the steam-water sample after the collection and analysis are qualified can be supplemented into the thermal power generation system for recycling, in order to avoid waste caused by the fact that redundant steam-water sample qualified in analysis is discharged into the first drainage pit through the second sampling pipeline in the process of collecting and analyzing the steam-water sample. In the present disclosure, by setting the three-way valve, the recovery pipeline and the recovery water tank, the a port of the three-way valve is used for communication with the steam-water sampling port of the thermal generator set, the B port of the three-way valve is communicated with the inlet of the second sampling pipeline, and the C port of the three-way valve is communicated with the inlet of the recovery pipeline. In the process of steam-water sampling detection, the steam-water sample is directly introduced into the first sampling pipeline and is collected and analyzed by the steam-water analysis instrument. When the steam-water sample is not detected by the steam-water analysis instrument or the detection result is unqualified, the port A of the three-way valve is communicated with the port B of the three-way valve, and the steam-water sample can be discharged to the first drainage pit through the second sampling pipe; when the steam-water sample is qualified by the detection result of the steam-water analysis instrument, the A port of the three-way valve is communicated with the C port of the three-way valve, and the steam-water sample can be recovered into the recovery water tank through the recovery pipeline so as to be recycled by the thermal power generation system, so that the waste of resources is avoided, and the cost is saved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a flow chart of a related art steam-water sampling recovery system;

FIG. 2 is a flow chart for single steam-water sample recovery of the steam-water sampling recovery system provided in one exemplary embodiment of the present disclosure;

FIG. 3 is a flow chart for multiple steam-water sample recovery of the steam-water sampling recovery system provided in one exemplary embodiment of the present disclosure;

FIG. 4 is an enlarged view of the portion X of FIG. 3;

fig. 5 is an enlarged view of a portion Y in fig. 3.

Description of the reference numerals

1. A first sampling line; 2. a second sampling line; 201. a first manifold; 202. a first branch pipe; 3. a recovery pipeline; 301. a second manifold; 302. a second branch pipe; 4. a recovery water tank; 5. a three-way valve; 6. a steam-water sampling port; 7. a first drainage pit; 8. a manual sampling port; 9. a water quality detection device; 901. a conductivity meter; 902. a Ph value detector; 10. a first electromagnetic valve; 11. a first discharge line; 12. a second electromagnetic valve; 13. a water delivery pipeline; 14. a water pump; 15. a one-way valve; 16. a liquid level gauge; 17. an overflow line; 18. a second discharge line; 19. a switch valve; 20. a capacity expansion pipe; 21. a steam-water analysis instrument; 22. a condensation tank; 23. and a second drainage pit.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used to generally refer to upper, lower, top, bottom, and the gravitational direction of the respective components in the use state, "inner, outer" refer to the inner and outer of the respective component's own contour, and "first" and "second" are used to distinguish one element from another.

In the process of generating power by the thermal power generation system, the thermal power generation unit needs to rely on steam-water circulation to perform energy conversion power generation, and the quality of steam-water is closely related to the safety and efficiency of equipment. The devices in the thermal generator set mainly comprise a deaerator, a steam drum, an economizer, a condensate pump 14, a condensate tank 22, a high-pressure heater, a low-pressure heater, a cold water main pipe and the like, so that in order to ensure that the current quality of the steam water can be detected in real time, the steam water in the deaerator, the steam drum, the economizer, the condensate pump 14, the condensate tank 22, the high-pressure heater, the low-pressure heater, the cold water main pipe and the like is required to be continuously sampled for 24 hours during the normal operation of the thermal generator set. Once a certain steam-water index is found out not to be in the specified range, corresponding discharging or dosing measures are immediately adopted for adjustment, so that the quality of the steam-water is ensured to be always in the specified value.

As shown in fig. 1, in the related art, in the process of performing steam sampling detection on a thermal power generating set, a certain steam-water sample is usually collected by a first sampling pipeline 1, the steam-water sample can flow to a steam-water analysis instrument 21 through the first sampling pipeline 1, the quality of the steam-water sample is analyzed by the steam-water analysis instrument 21, and in order to ensure that the quality of the steam-water sample can be monitored in real time, the steam-water analysis instrument 21 needs to continuously collect and analyze the steam-water sample, so that the steam-water sample can be directly introduced into the first sampling pipeline 1 and collected and analyzed by the steam-water analysis instrument 21. In the above process, the surplus steam-water sample is discharged as waste water into the second sampling pipe 2, and is discharged into the first drain pit 7 through the second sampling pipe 2.

In order to avoid the problem of the steam-water analysis instrument 21, the steam-water sample analysis result is wrong, the sample in the second sampling tube is sampled through the manual sampling port 8 arranged on the second sampling pipeline 2, and then the sample is taken out of the laboratory for detection and analysis, so that the accuracy of the sample detection result is ensured.

In the above process, since the steam-water sample after the qualified collection and analysis can be fed into the thermal power generation system for recycling, in order to avoid the waste caused by the fact that the excessive steam-water sample after the qualified analysis is discharged into the first drainage pit 7 through the second sampling pipeline 2 in the process of collecting and analyzing the steam-water sample, as shown in fig. 2-5, the present disclosure provides a steam-water sampling recovery system of the thermal power generation system, which comprises the first sampling pipeline 1 and the second sampling pipeline 2, as well as a recovery pipeline 3, a recovery water tank 4 and a three-way valve 5. The inlet of the first sampling pipeline 1 and the A port of the three-way valve 5 are both used for being communicated with a steam-water sampling port 6 of the thermal generator set, and the outlet of the first sampling pipeline 1 is used for being communicated with the inlet of the steam-water analysis instrument 21; the inlet of the second sampling pipeline 2 is communicated with the port B of the three-way valve 5, the outlet of the second sampling pipeline 2 is communicated with the first drainage pit 7, and the second sampling pipeline 2 is provided with a manual sampling port 8; the inlet of the recovery pipeline 3 is communicated with the C port of the three-way valve 5, and the outlet of the recovery pipeline 3 is communicated with the inlet of the recovery water tank 4.

Through the above technical scheme, as shown in fig. 2, because the port a of the three-way valve 5 is communicated with the steam-water sampling port 6 of the thermal generator set, the port B of the three-way valve 5 is communicated with the inlet of the second sampling pipeline 2, and the port C of the three-way valve 5 is communicated with the inlet of the recovery pipeline 3, in the process of steam-water sampling detection, the steam-water sample can be always introduced into the first sampling pipeline 1 and collected and analyzed by the steam-water analysis instrument 21. When the steam-water sample is not detected by the steam-water analysis instrument 21 or the detection result is unqualified, the port A of the three-way valve 5 and the port B of the three-way valve 5 can be communicated, so that the steam-water sample can be discharged to the first drainage pit 7 through the second sampling pipeline 2; when the steam-water sample is qualified by the detection result of the steam-water analysis instrument 21, the port A of the three-way valve 5 is communicated with the port C of the three-way valve, and the steam-water sample can be recycled to the recycling water tank 4 through the recycling pipeline 3 so as to be recycled by the thermal power generation system, so that the waste of resources is avoided, and the cost is saved.

The connection between the port a of the three-way valve 5 and the port B of the three-way valve 5 or the connection between the port a of the three-way valve 5 and the port C of the three-way valve 5 may be manually controlled or controlled by a programmable logic controller (programmable logic controller, PLC), which is not limited in this disclosure.

In addition, in order to sample the steam water samples in the thermal power generation unit, such as the deaerator, the economizer, the condensate pump 14, the high-pressure heater, the low-pressure heater, the air heater, the cold water main pipe and other equipment through the corresponding first sampling pipeline 1, and uniformly recover the steam water samples after being analyzed to be qualified by the steam water analysis instrument 21, so that the cyclic utilization is facilitated, and the pipelines are also saved, so that optionally, as shown in fig. 3, a plurality of three-way valves 5 are selected, optionally, an A port of each three-way valve 5 is communicated with a corresponding steam water sampling port 6 (such as a steam water sampling port 6 of the equipment) is selected, and optionally, the three-way valves 5 are selected; the number of the first sampling pipelines 1 is plural, and the inlet of each first sampling pipeline 1 is used for communicating with the corresponding steam-water sampling port 6. The second sampling pipe 2 includes a first manifold 201 and a plurality of first branch pipes 202, the manual sampling port 8 is provided on the first branch pipes 202, an inlet of each first branch pipe 202 communicates with a port B of the corresponding three-way valve 5, an outlet of each first branch pipe 202 communicates with the first manifold 201, and an outlet of the first manifold 201 is used to communicate with the first drain pit 7. The recovery line 3 comprises a second collecting pipe 301 and a plurality of second branch pipes 302, the inlet of each second branch pipe 302 is communicated with the C port of the corresponding three-way valve 5, the outlet of each second branch pipe 302 is communicated with the second collecting pipe 301, and the outlet of the second collecting pipe 301 is communicated with the inlet of the recovery water tank 4.

Here, the present disclosure describes an example in which steam-water samples in three devices, i.e., a deaerator, a heater, and an economizer, in a thermal power generation unit are collected and collected, respectively. The processing procedure of collecting the steam water samples respectively by other thermal generator set devices, such as the condensate pump 14, the condensate tank 22, the high-pressure heater, the low-pressure heater, the cold water main pipe and the like, and then summarizing the steam water samples is the same as that of the example, and is not described in the disclosure. In addition, since the steam-water sample in the steam drum needs to be analyzed for a large number of indexes, the steam-water sample is consumed by the steam-water analysis meter 21 to be detected, and no excessive steam-water sample remains basically, so that recovery is not required.

As an exemplary embodiment, since the inlet of each first sampling line 1 is used to communicate with the corresponding steam-water sampling port 6, the first sampling line 1 of the corresponding deaerator communicates with the steam-water sampling port of the deaerator, the first sampling line 1 of the corresponding warm air heater communicates with the steam-water sampling port of the warm air heater, and the first sampling line 1 of the corresponding economizer communicates with the steam-water sampling port of the economizer. When all the three steam-water samples are detected to be qualified, the A port of the three corresponding three-way valves 5 is communicated with the C port of the three-way valves 5, so that the qualified three steam-water samples can be converged into the second collecting pipe 301 through the corresponding second branch pipes 302, and then enter the recovery water tank 4 through the second collecting pipe 301 for recovery.

When the detection of a certain vapor-water sample in the three types of vapor-water samples is failed, if the detection of the vapor-water sample in the deaerator is failed, the port A of the three-way valve 5 on the pipeline for collecting the vapor-water sample in the deaerator is communicated with the port B of the three-way valve 5, and the vapor-water sample in the deaerator can be discharged to the first drainage pit 7 through the second sampling pipeline 2; the port A of the three-way valve 5 corresponding to the rest of the steam-water samples is communicated with the port C of the three-way valve 5, so that the qualified steam-water samples can be converged into the second collecting pipe 301 through the corresponding second branch pipes 302 respectively, and then enter the recovery water tank 4 for recovery through the second collecting pipe 301.

When the three steam-water samples are unqualified, the opening A of the three corresponding three-way valves 5 is communicated with the opening B of the three-way valves 5, so that the unqualified steam-water samples can be converged into the first collecting pipe 201 through the corresponding first branch pipes 202 respectively, and then discharged into the first drainage pit 7 through the first collecting pipe 201.

In order to avoid that the analysis result of the steam-water sample is erroneous when the steam-water analysis meter 21 is in trouble, the first branch pipe 202 may be provided with the manual sampling port 8. Therefore, when the detection result of the steam-water analysis instrument 21 is in doubt, the detection personnel can take out the corresponding steam-water sample through the manual sampling port 8 and take out the sample for detection and analysis in the laboratory so as to ensure the accuracy of the detection result of the sample.

And when the detection results of a certain steam-water analysis instrument 21 corresponding to the deaerator, the heater and the economizer are in doubt, the port A of the three-way valve 5 on the pipeline is communicated with the port B of the three-way valve 5, the steam-water sample enters the first branch pipe 202 and is collected through the manual sampling port 8 and then is sent to a laboratory for detection and analysis, and at the moment, the steam-water sample with the doubtful detection results is always discharged into the first collecting pipe 201 through the first branch pipe 202 and is discharged into the first drainage pit 7 before being not confirmed to be qualified.

Based on the above arrangement, various qualified soda samples can be respectively introduced into the second collecting pipe 301 through the corresponding second branch pipes 302, in this process, the quality of the new soda sample formed by integrating various soda samples may change, and in order to ensure that the quality of the soda sample introduced into the recovery water tank 4 is qualified, optionally, the second collecting pipe 301 is provided with a water quality detecting device 9 and a first electromagnetic valve 10, and the first electromagnetic valve 10 is located downstream of the water quality detecting device 9.

As an exemplary embodiment, the water quality detecting device 9 may be a conductivity meter 901, a Ph value detector 902, or the like, and after various soda samples are collected into the second collecting pipe 301 through the corresponding second branch pipes 302, the conductivity and Ph values of the collected soda samples are detected by the conductivity meter 901 and the Ph value detector 902, respectively, and whether the conductivity and Ph values of the collected soda samples reach the qualification standards for entering the recovery water tank 4 is detected.

When the collected steam-water sample is qualified, the first electromagnetic valve 10 conducts the second collecting pipe 301, so that the collected and qualified steam-water sample can be recovered into the recovery water tank 4 for storage, and the recovery water tank is waiting for recycling.

When the collected soda water sample is failed to be detected, the first electromagnetic valve 10 cuts off the second collecting pipe 301, so that the collected soda water sample failed to be detected cannot enter the recovery water tank 4.

As an implementation manner, the first electromagnetic valve 10 can be controlled to be opened and closed by a separate control system, and the first electromagnetic valve 10 is controlled to be opened and closed according to the result of the collected steam-water sample detected by the water quality detection device 9; as another embodiment, the first electromagnetic valve 10 may share the same set of control system with the water quality detection device 9, and the control system may implement opening and closing of the first electromagnetic valve 10 according to the detection result of the water quality detection device 9 on the summarized steam water sample.

In addition, the first electromagnetic valve 10 and the water quality detecting device 9 may be linked with the three-way valve 5. When the collected steam-water sample is unqualified in detection, the first electromagnetic valve 10 cuts off the second collecting pipe 301, so that the collected steam-water sample which is unqualified in detection cannot enter the recovery water tank 4, and the port A of the three-way valve 5 is communicated with the port B of the three-way valve 5, so that the steam-water sample is temporarily not introduced into the corresponding second branch pipe 302, but is converged into the first collecting pipe 201 through the corresponding first branch pipe 202, and is discharged into the first drainage pit 7 through the first collecting pipe 201; when the collected steam-water samples are qualified, the first electromagnetic valve 10 is conducted to the second collecting pipe 301 again, so that the collected steam-water samples which are qualified in detection enter the recovery water tank 4, and the port A of the three-way valve 5 is conducted to the port C of the three-way valve 5, so that the steam-water samples can be continuously conducted into the corresponding second branch pipes 302 and are collected into the second collecting pipe 301.

Optionally, the steam-water sampling recovery system further comprises a first discharge pipeline 11 and a second electromagnetic valve 12 arranged on the first discharge pipeline 11, wherein an inlet of the first discharge pipeline 11 is connected to a part of the second collecting pipe 301 between the water quality detection device 9 and the first electromagnetic valve 10, and an outlet of the first discharge pipeline 11 is used for communicating with the second drain pit 23.

Through the above arrangement, when the water quality detection device 9 detects that the collected steam-water samples are unqualified, the first electromagnetic valve 10 cuts off the second collecting pipe 301, and the second electromagnetic valve 12 is communicated with the first discharge pipeline 11, so that the collected steam-water samples which are unqualified are discharged into the second drain pit 23 through the first discharge pipeline 11, and the unqualified steam-water samples are effectively prevented from being recycled into the recovery water tank 4.

As an embodiment, the second electromagnetic valve 12 can be controlled to be opened and closed by a separate control system, and the second electromagnetic valve 12 is controlled to be opened and closed according to the result of the collected steam-water sample after being detected by the water quality detection device 9.

As another embodiment, the second electromagnetic valve 12 may share the same set of control system with the first electromagnetic valve 10 and the water quality detection device 9, and the control system may implement opening and closing of the first electromagnetic valve 10 and the second electromagnetic valve 12 respectively according to the detection result of the water quality detection device 9 on the summarized steam-water sample.

Here, the first drainage pit 7 and the second drainage pit 23 may be the same drainage pit, or may be two separate drainage pits, respectively.

Optionally, the steam-water sampling and recycling system further comprises a water conveying pipeline 13 and a water pump 14 arranged on the water conveying pipeline 13, wherein an inlet of the water conveying pipeline 13 is communicated with an outlet of the recycling water tank 4, and an outlet of the water conveying pipeline 13 is used for being communicated with a condensation water tank 22 of the thermal generator set.

Through the arrangement, the water pump 14 pumps out the steam-water sample in the recovery water tank 4, and then the steam-water sample enters the condensation water tank 22 through the water conveying pipeline 13 to be condensed into a liquid state, and then the liquid state is recycled for the thermal power generation group.

It should be noted that, since the condensate tank 22 may also recover other liquids, the condensate tank 22 may be connected to the expansion pipe 20, and the water pipe 13 and the other liquid pipes are collected in the expansion pipe 20 and then enter the condensate tank 22 together, so as to reduce the use of pipes.

Optionally, the recovery water tank 4 is further communicated with a liquid level gauge 16, one end of the liquid level gauge 16 is communicated with the upper portion of the recovery water tank 4, the other end of the liquid level gauge 16 is communicated with the lower portion of the recovery water tank 4, and the liquid level gauge 16 is used for monitoring the liquid level in the recovery water tank 4.

When the level gauge 16 detects that the level of the liquid in the recovery tank 4 is too high, the water pump 14 may be activated, and the water pump 14 draws the soda water sample in the recovery tank 4 into the condensate tank 22.

As an embodiment, the level gauge 16 may be provided as a separate device for monitoring the level of the liquid in the recovery tank 4 to assist the operator in determining whether to activate the water pump 14 and to withdraw a sample of the soda water from the recovery tank 4.

As another embodiment, the liquid level meter 16 may also be in linkage with the water pump 14 through the control system, and after the liquid level meter 16 observes that the soda sample in the recovery water tank 4 reaches the recovery height, the water pump 14 is controlled to be started through the control system so as to pump out the soda sample in the recovery water tank 4.

In addition, both ends that the level gauge 16 and the recovery water tank 4 are communicated can be provided with manual stop valves, so that after the pipelines at both ends of the level gauge 16 are cut off, the level gauge 16 is overhauled.

Optionally, the water delivery pipe 13 is provided with a one-way valve 15, and the one-way valve 15 is arranged downstream of the water pump 14.

By the aid of the check valve 15, steam-water samples in the water conveying pipeline 13 cannot flow back into the water pump 14, and damage to the water pump 14 can be effectively avoided.

As an embodiment, the water pipe 13 is further provided with a first switch valve 19 and a second switch valve 19, and the first switch valve 19 and the second switch valve 19 are located upstream of the water pump 14 and downstream of the water pump 14, respectively. The first switch valve 19 and the second switch valve 19 can cut off the upstream and downstream of the pipeline where the water pump 14 is located, so as to overhaul or replace the water pump 14.

Optionally, the steam-water sampling and recycling system further comprises an overflow pipeline 17 and a second discharge pipeline 18, wherein an inlet of the overflow pipeline 17 is communicated with an overflow port of the recycling water tank 4, an outlet of the overflow pipeline 17 is communicated with a second drainage pit 23, an inlet of the second discharge pipeline 18 is communicated with a drain outlet of the recycling water tank 4, an outlet of the second discharge pipeline 18 is communicated with the second drainage pit 23, and a switch valve 19 is arranged on the second discharge pipeline 18.

With the above arrangement, when too many soda water samples in the recovery water tank 4 have not been timely pumped by the water pump 14, the excessive soda water samples can be discharged from the overflow port of the recovery water tank 4 and discharged into the second drain pit 23 through the overflow pipe 17. When the recovery water tank 4 needs to be cleaned, the switch valve 19 can be opened to discharge the steam-water sample in the recovery water tank 4 to the second drain pit 23 through the second drain pipeline 18 so as to periodically clean the interior of the recovery water tank 4.

Here, the overflow port may be provided at the top of the recovery tank 4, and the drain port may be provided at the bottom of the recovery tank 4.

According to a second aspect of the present disclosure, there is provided a thermal power generation system comprising a thermal power generation unit and a steam-water sampling recovery system as above. The thermal power generation system has all the technical effects of the steam-water sampling and recovering system, and the disclosure is not repeated here.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. The steam-water sampling and recycling system of the thermal power generation system is characterized by comprising a first sampling pipeline, a second sampling pipeline, a recycling water tank and a three-way valve;

the inlet of the first sampling pipeline and the A port of the three-way valve are both used for being communicated with a steam-water sampling port of the thermal generator set, and the outlet of the first sampling pipeline is used for being communicated with the inlet of a steam-water analysis instrument;

the inlet of the second sampling pipeline is communicated with the port B of the three-way valve, the outlet of the second sampling pipeline is communicated with the first drainage pit, and a manual sampling port is arranged on the second sampling pipeline;

the inlet of the recovery pipeline is communicated with the C port of the three-way valve, and the outlet of the recovery pipeline is communicated with the inlet of the recovery water tank.

2. The soda sampling recovery system according to claim 1, wherein the three-way valves are plural, and an a port of each three-way valve communicates with the corresponding soda sampling port;

the plurality of first sampling pipelines are arranged, and the inlet of each first sampling pipeline is used for being communicated with the corresponding steam-water sampling port;

the second sampling pipeline comprises a first collecting pipe and a plurality of first branch pipes, the manual sampling ports are arranged on the first branch pipes, the inlet of each first branch pipe is communicated with the corresponding port B of the three-way valve, the outlet of each first branch pipe is communicated with the first collecting pipe, and the outlet of the first collecting pipe is used for being communicated with the first drainage pit;

the recovery pipeline comprises a second collecting pipe and a plurality of second branch pipes, wherein the inlet of each second branch pipe is communicated with the corresponding C port of the three-way valve, the outlet of each second branch pipe is communicated with the second collecting pipe, and the outlet of the second collecting pipe is communicated with the inlet of the recovery water tank.

3. The soda water sampling recovery system according to claim 2, wherein the second manifold is provided with a water quality detection device and a first solenoid valve, the first solenoid valve being located downstream of the water quality detection device.

4. The soda water sampling recovery system according to claim 3, wherein the water quality detection device includes a conductivity meter and a Ph value detector.

5. The steam-water sampling recovery system of claim 3, further comprising a first drain line and a second solenoid valve disposed on the first drain line, an inlet of the first drain line being bypassed at a portion of the second manifold between the water quality detection device and the first solenoid valve, an outlet of the first drain line being configured to communicate with a second drain pit.

6. The steam-water sampling recovery system according to any one of claims 1 to 5, further comprising a water delivery pipeline and a water pump provided on the water delivery pipeline, an inlet of the water delivery pipeline being in communication with an outlet of the recovery water tank, the outlet of the water delivery pipeline being for communication with a condensate tank of the thermal power generation unit.

7. The soda water sampling recovery system according to claim 6, wherein the water conduit is provided with a one-way valve, the one-way valve being provided downstream of the water pump.

8. The soda water sampling and recovery system according to claim 6, wherein the recovery water tank is further communicated with a level gauge, one end of the level gauge is communicated with an upper portion of the recovery water tank, the other end of the level gauge is communicated with a lower portion of the recovery water tank, and the level gauge is used for monitoring the level of the liquid in the recovery water tank.

9. The soda sampling recovery system according to claim 5, further comprising an overflow line and a second drain line, an inlet of the overflow line being in communication with an overflow port of the recovery tank, an outlet of the overflow line being in communication with the communication port, an inlet of the second drain line being in communication with a drain port of the recovery tank, an outlet of the second drain line being in communication with the second drain pit, the second drain line being provided with a switch valve.

10. A thermal power generation system comprising a thermal power generation unit and the steam-water sampling recovery system according to any one of claims 1 to 9.