A monitoring device for broken resins
By setting up an online monitoring system for sampling points, membrane concentration devices, and cooling devices in the fine treatment mixed bed of thermal power units, the impact of resin breakage on water and steam quality was resolved, enabling early warning and accurate detection of resin breakage and ensuring the stable operation of the water and steam system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU GUOHUACHENJIAGANG POWER GENERATION CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, broken resin decomposes and releases organic molecules or organic acid ions under high temperature and pressure, affecting the water and steam quality of thermal power units. Furthermore, existing monitoring methods are not sensitive enough to extremely low concentrations of broken resin particles, making it impossible to detect early leaks in a timely manner.
A resin breakage monitoring device was designed. By setting sampling points at the inlet and outlet of the fine treatment mixed bed, and combining it with a membrane concentration device and a cooling device, a complete online monitoring system is formed. The system can monitor the TOCi value in real time, accurately detect trace resin breakage products, and perform alarm and trend analysis through the DCS system.
It enables early warning of resin breakage, reduces the missed detection rate, ensures the quality stability of the water vapor system, extends the service life of analytical instruments, improves the sensitivity and accuracy of monitoring, and can respond to and handle abnormal situations in a timely manner.
Smart Images
Figure CN224416852U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of water treatment technology in the power plant industry, and relates to a monitoring device, specifically a monitoring device for broken resin. Background Technology
[0002] To suppress flow-accelerated corrosion (FAC) of thermal equipment and pipelines in the steam-water system during the operation of thermal power units, a certain concentration of oxygen is usually added to the feedwater. This promotes the formation of a protective film with a double-layer structure of Fe2O3 and Fe3O4 on the metal surface, thereby inhibiting flow-accelerated corrosion and stabilizing the iron content of the steam-water system at a low level. After oxygenation and conversion equilibrium, the feedwater pH decreases from 9.2–9.6 during oxidative volatile treatment (AVT(O)) to 9.0–9.2 during oxygenation treatment (OT). This can significantly reduce the amount of ammonia added to the feedwater, meaning that the cycle water production of the high-speed mixed bed condensate polishing is increased. The cycle water production of the hydrogen form of the polishing mixed bed will increase by at least 100%. After long-term operation, the resin in the polishing mixed bed is prone to compaction and caking, leading to resin breakage. This broken resin enters the steam system with the feedwater, decomposes under high temperature and pressure, and releases organic molecules or organic acid ions, directly affecting the steam-water quality of the unit.
[0003] In order to monitor the operation of the mixed bed resin for fine treatment after oxygenation of feedwater in real time, it is urgent to develop a monitoring device for breaking the resin, so as to optimize and adjust the operation cycle of the mixed bed for fine treatment after pH reduction of feedwater under oxygenation treatment conditions. Utility Model Content
[0004] To overcome the technical problem in the existing technology that the organic matter generated by broken resin enters the steam system and decomposes and releases organic molecules or organic acid ions under high temperature and high pressure, directly affecting the water and steam quality of the unit, the purpose of this utility model is to provide a monitoring device for broken resin, which can quickly, accurately and in real time monitor the abnormal boiler water and steam quality caused by resin compaction, caking and breakage due to the long operation cycle of mixed bed.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A monitoring device for broken resin includes a sampling point at the inlet of the fine treatment mixed bed and a sampling point at the outlet of the fine treatment mixed bed. Both the sampling point at the inlet of the fine treatment mixed bed and the sampling point at the outlet of the fine treatment mixed bed are connected to the inlet of a cooling device. The outlet of the cooling device is divided into two paths: one path is connected to an online TOCi analyzer at the inlet of the fine treatment mixed bed and a DCS host computer display system, and the other path is connected to an online TOCi analyzer at the outlet of the fine treatment mixed bed and a DCS host computer display system.
[0007] Furthermore, the sampling point at the inlet of the fine treatment mixed bed is connected to the inlet of the cooling device via the first membrane concentration unit.
[0008] Furthermore, an inlet sampling valve for the fine treatment mixed bed is installed between the sampling point at the inlet of the fine treatment mixed bed and the first membrane concentration device.
[0009] Furthermore, a second sampling valve for the fine treatment mixed bed inlet is installed between the first membrane concentration unit and the cooling unit.
[0010] Furthermore, a third sampling valve for the fine treatment mixed bed inlet is installed between one outlet of the cooling device and the online TOCi analyzer at the inlet of the fine treatment mixed bed.
[0011] Furthermore, a second membrane concentration device is installed between the sampling point at the outlet of the fine treatment mixed bed and the inlet of the cooling device.
[0012] Furthermore, a first sampling valve for the outlet of the fine treatment mixed bed is installed between the sampling point at the outlet of the fine treatment mixed bed and the second membrane concentration device.
[0013] Furthermore, a second sampling valve for the fine treatment mixed bed outlet is installed between the inlet of the second membrane concentration unit and the inlet of the cooling unit.
[0014] Furthermore, a third sampling valve for the outlet of the fine treatment mixed bed is installed between the other outlet of the cooling device and the online TOCi analyzer at the inlet of the fine treatment mixed bed.
[0015] Furthermore, it also includes an alarm module connected to the DCS host computer display system.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] In this invention, a sampling point at the inlet and outlet of the mixed bed for refining is installed, along with an online TOCi analyzer at the inlet and outlet, and a cooling device, forming a complete online monitoring system. This system can monitor key indicators such as TOCi (Total Organic Carbon Index) in water samples in real time and continuously, promptly detecting resin breakage and leakage. It solves the problem that existing direct monitoring methods are not sensitive enough for extremely low concentrations of broken resin particles (especially initial trace leaks). The device in this invention concentrates and enriches the organic matter in the water sample (including dissolved organic matter and particles released from broken resin), significantly increasing the concentration of the analyte entering the subsequent TOCi analyzer. This allows the instrument to detect trace amounts of resin breakage products more sensitively and accurately, greatly reducing the false negative rate and enabling early warning. A cooling device is installed after the concentration device in this invention. The inlet and outlet temperatures of the refining mixed bed are usually high; directly introducing this water into precision analytical instruments such as the TOCi analyzer may damage the instrument or affect measurement accuracy. Cooling high-temperature water samples to a safe operating temperature range suitable for the TOCi analyzer extends its service life and ensures the reliability of measurement results. This invention monitors water quality before and after the mixed bed using independent but structurally similar influent and effluent monitoring systems. Since monitoring only the influent or effluent cannot accurately determine the source of the problem, this invention, by comparing the TOCi values of the influent and effluent, can more clearly determine the source of organic matter (whether it is introduced by the influent or generated by resin breakage within the mixed bed), helping to accurately locate the problem and assess the operating status and failure points of the mixed bed. This invention can monitor the TOCi values and their changing trends of the mixed bed's influent and effluent in real time. Once the detected value abnormally increases (indicating resin breakage and leakage), the system can promptly issue an alarm, facilitating rapid response and handling, and preventing water vapor system contamination. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a monitoring device for broken resin according to the present invention.
[0019] Among them, 1 is the sampling point at the inlet of the fine treatment mixed bed, 2 is the first sampling valve at the inlet of the fine treatment mixed bed, 3 is the first membrane concentration device, 4 is the second sampling valve at the inlet of the fine treatment mixed bed, 5 is the cooling device, 6 is the fourth sampling valve at the inlet of the fine treatment mixed bed, 7 is the online TOCi analyzer at the inlet of the fine treatment mixed bed, 8 is the sampling point at the outlet of the fine treatment mixed bed, 9 is the first sampling valve at the outlet of the fine treatment mixed bed, 10 is the second membrane concentration device, 11 is the second sampling valve at the outlet of the fine treatment mixed bed, 12 is the third sampling valve at the outlet of the fine treatment mixed bed, 13 is the online TOCi analyzer at the outlet of the fine treatment mixed bed, and 14 is the DCS host computer display system. Detailed Implementation
[0020] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.
[0021] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] like Figure 1 As shown, the present invention discloses a monitoring device for broken resin, comprising a sampling point 1 at the inlet of a fine-treatment mixed bed, a first sampling valve 2 at the inlet of a fine-treatment mixed bed, a first membrane concentration device 3, a second sampling valve 4 at the inlet of a fine-treatment mixed bed, a cooling device 5, a third sampling valve 6 at the inlet of a fine-treatment mixed bed, an online TOCi analyzer at the inlet of a fine-treatment mixed bed 7, a sampling point 8 at the outlet of a fine-treatment mixed bed, a first sampling valve 9 at the outlet of a fine-treatment mixed bed, a second membrane concentration device 10, a second sampling valve 11 at the outlet of a fine-treatment mixed bed, a third sampling valve 12 at the outlet of a fine-treatment mixed bed, an online TOCi analyzer at the outlet of a fine-treatment mixed bed 13, and a DCS host computer display system 14.
[0024] Among them, the sampling point 1 at the inlet of the fine treatment mixed bed is connected to the inlet of the first sampling valve 2 at the inlet of the fine treatment mixed bed; the outlet of the first sampling valve 2 at the inlet of the fine treatment mixed bed is connected to the inlet of the first membrane concentration device 3; the outlet of the first membrane concentration device 3 is connected to the inlet of the second sampling valve 4 at the inlet of the fine treatment mixed bed; the outlet of the second sampling valve 4 at the inlet of the fine treatment mixed bed is connected to the inlet of the cooling device 5; the outlet of the cooling device 5 is connected to the inlet of the third sampling valve 6 at the inlet of the fine treatment mixed bed; the outlet of the third sampling valve 6 at the inlet of the fine treatment mixed bed is connected to the online TOCi analyzer 7 at the inlet of the fine treatment mixed bed; and the online TOCi analyzer 7 at the inlet of the fine treatment mixed bed is connected to the DCS host computer display system 14, forming a fine treatment mixed bed inlet water monitoring system.
[0025] The sampling point 8 at the outlet of the fine treatment mixed bed is connected to the inlet of the first sampling valve 9 at the outlet of the fine treatment mixed bed. The outlet of the first sampling valve 9 at the outlet of the fine treatment mixed bed is connected to the inlet of the second membrane concentration device 10. The outlet of the second membrane concentration device 10 is connected to the inlet of the second sampling valve 11 at the outlet of the fine treatment mixed bed. The outlet of the second sampling valve 11 at the outlet of the fine treatment mixed bed is connected to the inlet of the cooling device 5. The outlet of the cooling device 5 is connected to the inlet of the third sampling valve 12 at the outlet of the fine treatment mixed bed. The outlet of the third sampling valve 12 at the outlet of the fine treatment mixed bed is connected to the online TOCi analyzer 13 at the inlet of the fine treatment mixed bed. The online TOCi analyzer 13 at the inlet of the fine treatment mixed bed is connected to the DCS host computer display system 14, forming a fine treatment mixed bed effluent monitoring system.
[0026] The fine treatment mixed bed inlet water monitoring system is put into operation. First, the constant temperature of the cooling device 5 is set to 25℃. Then, the first sampling valve 2 at the inlet of the fine treatment mixed bed is opened in sequence. The outlet of the first sampling valve 2 is connected to the inlet of the first membrane concentration device 3. The concentrated water after being concentrated and enriched by the first membrane concentration device 3 is connected to the inlet of the second sampling valve 4 at the inlet of the fine treatment mixed bed. The second sampling valve 4 at the inlet of the fine treatment mixed bed is opened, and the water sample enters the cooling device 5. The outlet water sample of the cooling device 5 is kept at a constant temperature of 25℃. Then, the third sampling valve 6 at the inlet of the fine treatment mixed bed is opened, and the water sample enters the online TOCi analyzer 7 at the inlet of the fine treatment mixed bed for detection. The instrument detection signal of the online TOCi analyzer 7 at the inlet of the fine treatment mixed bed is transmitted to the DCS system in real time and displayed through the DCS host computer display system 14.
[0027] The fine treatment mixed bed effluent monitoring system is put into operation. First, the constant temperature of the cooling device 5 is set to 25℃. Then, the first sampling valve 9 at the outlet of the fine treatment mixed bed is opened in sequence. The outlet of the first sampling valve 9 is connected to the inlet of the second membrane concentration device 10. The concentrated water after being concentrated and enriched by the second membrane concentration device 10 is connected to the inlet of the second sampling valve 11 at the outlet of the fine treatment mixed bed. The second sampling valve 11 at the outlet of the fine treatment mixed bed is opened, and the water sample enters the cooling device 5. The outlet water sample of the cooling device 5 is kept at a constant temperature of 25℃. Then, the third sampling valve 12 at the outlet of the fine treatment mixed bed is opened, and the water sample enters the online TOCi analyzer 13 at the outlet of the fine treatment mixed bed for detection. The instrument detection signal of the online TOCi analyzer 13 at the outlet of the fine treatment mixed bed is transmitted to the DCS system in real time and displayed through the DCS host computer display system 14.
[0028] This utility model also includes an alarm module integrated into the DCS system. The detection content signals from the online TOCi analyzer 7 at the inlet of the fine-treatment mixed bed and the online TOCi analyzer 13 at the inlet of the fine-treatment mixed bed are transmitted to the DCS system to calculate the increase in TOCi at the outlet of the mixed bed, which serves as an alarm. The DCS system receives the detection data from the online TOCi analyzer 7 at the inlet of the fine-treatment mixed bed and the online TOCi analyzer 13 at the outlet of the fine-treatment mixed bed in real time. The DCS system dynamically calculates the TOCi increment at the inlet and outlet. Specifically, the TOCi value of the online TOCi analyzer 13 at the outlet of the fine-treatment mixed bed is subtracted from the TOCi value of the online TOCi analyzer 7 at the inlet of the fine-treatment mixed bed to obtain the TOCi increment and ΔTOCi. When ΔTOCi > a set threshold, it is determined that there is a risk of resin breakage and leakage, triggering an audible and visual alarm in the DCS system.
[0029] When the TOCi value at the outlet continues to rise or exceeds the safety limit, it indicates that the quality of the imported water source (condensate, demineralized water) is abnormal, and a level two alarm is triggered simultaneously. It is recommended to investigate the cause of the TOCi increase in the imported water source as soon as possible to prevent further contamination of the mixed bed resin.
[0030] The DCS host computer display system 14 displays the TOCi trend curves and ΔTOCi change graphs of the inlet and outlet in real time, assisting operators in judging the operating status of the resin.
[0031] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
Claims
1. A monitoring device for broken resin, characterized in that, The system includes a fine treatment mixed bed inlet sampling point (1) and a fine treatment mixed bed outlet sampling point (8) set on the fine treatment mixed bed. Both the fine treatment mixed bed inlet sampling point (1) and the fine treatment mixed bed outlet sampling point (8) are connected to the inlet of the cooling device (5). The outlet of the cooling device (5) is divided into two paths. One path is connected to the fine treatment mixed bed inlet online TOCi analyzer (7) and the DCS host computer display system (14). The other path is connected to the fine treatment mixed bed outlet online TOCi analyzer (13) and the DCS host computer display system (14).
2. The monitoring device for broken resin according to claim 1, characterized in that, The sampling point (1) at the inlet of the fine treatment mixed bed is connected to the inlet of the cooling device (5) via the first membrane concentration device (3).
3. The monitoring device for broken resin according to claim 2, characterized in that, A first sampling valve (2) for the inlet of the fine treatment mixed bed is provided between the sampling point (1) at the inlet of the fine treatment mixed bed and the first membrane concentration device (3).
4. The monitoring device for broken resin according to claim 2, characterized in that, A second sampling valve (4) for the fine treatment mixed bed inlet is provided between the first membrane concentration device (3) and the cooling device (5).
5. The monitoring device for broken resin according to claim 2, characterized in that, A third sampling valve (6) for the inlet of the fine treatment mixed bed is installed between one outlet of the cooling device (5) and the online TOCi analyzer (7) at the inlet of the fine treatment mixed bed.
6. The monitoring device for broken resin according to claim 1, characterized in that, A second membrane concentration device (10) is installed between the sampling point (8) at the outlet of the fine treatment mixed bed and the inlet of the cooling device (5).
7. The monitoring device for broken resin according to claim 6, characterized in that, A first sampling valve (9) for the outlet of the fine treatment mixed bed is provided between the sampling point (8) at the outlet of the fine treatment mixed bed and the second membrane concentration device (10).
8. The monitoring device for broken resin according to claim 6, characterized in that, A second sampling valve (11) for the outlet of the fine treatment mixed bed is provided between the inlet of the second membrane concentration device (10) and the inlet of the cooling device (5).
9. The monitoring device for broken resin according to claim 6, characterized in that, A third sampling valve (12) for the outlet of the cooling device (5) is installed between the outlet of the cooling device (5) and the online TOCi analyzer (13) at the inlet of the fine treatment mixed bed.
10. The monitoring device for broken resin according to claim 6, characterized in that, It also includes an alarm module connected to the DCS host computer display system (14).