Boiler flash tank water quality sampling system and operation method

Abstract

The invention relates to the technical field of boiler flash tank water quality sampling, in particular to a boiler flash tank water quality sampling system and an operation method, the boiler flash tank water quality sampling system comprises a detection unit respectively comprising a water level gauge pipeline module, an input module, a collection module, an output module and a test module; the water level gauge pipeline module is connected with a boiler flash tank, a water sample is taken out through the water level gauge pipeline module, passes through the input module and enters the collection module, flows out of the collection module, passes through the output module and finally enters the test module, and the water sample is detected; wherein the input module is divided into two branches to be connected with the collection module, through the arrangement, automatic collection and test of water samples can be achieved, the automation degree is high, the complexity of manual operation is avoided, and the risk that personnel are scalded is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of boiler expansion tank water quality sampling, and in particular to a boiler expansion tank water quality sampling system and an operating method. Background Art

[0002] During the operation of the boiler in a thermal power plant, water quality testing plays a vital role in the operating efficiency and safety of the boiler. Boiler water works under high temperature and high pressure, and is prone to various chemical changes, such as scaling and corrosion. These changes will seriously affect the performance and life of the boiler, so regular testing is required.

[0003] The existing sampling methods usually have poor corrosion resistance of the sampling system pipelines, and the sampling is cumbersome and can easily cause the risk of scalding. Corrosion and damage to the sampling system pipelines also directly affect the safe and stable operation and maintenance cost of boiler water quality. Therefore, the water quality sampling process needs to be made more convenient to avoid the tedious manual operation.

[0004] In order to solve the above problems, we proposed a boiler expansion tank water quality sampling system and operation method. Summary of the invention

[0005] In view of the above problems, a water quality sampling system for a boiler expansion tank in the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a water quality sampling system for a boiler expansion tank, comprising a detection unit, which includes a water level gauge pipeline module, an input module, a collection module, an output module and a testing module; the water level gauge pipeline module is connected to the boiler expansion tank, and the water sample is taken out through the water level gauge pipeline module, passes through the input module, and enters the collection module. The water sample flows out of the collection module, passes through the output module, and finally enters the testing module to detect the water sample; wherein the input module is divided into two branches connected to the collection module.

[0007] As a preferred solution of the boiler expansion tank water quality sampling system of the present invention, the water level gauge pipeline module includes a low water level pipeline and a high water level pipeline respectively connected to the boiler expansion tank; the water level gauge pipeline module also includes an outlet pipeline for passing the water sample into the input module.

[0008] As a preferred solution of the boiler expansion tank water quality sampling system of the present invention, the input module includes two branches connected in parallel, and each branch is connected in series by a first valve, a second valve and a third valve in sequence through a connecting pipe, and one side of the second valve is electrically connected to a control motor.

[0009] As a preferred solution of the boiler expansion tank water quality sampling system of the present invention, the collection module comprises a collector having an input port and an output port, and the output end of the third valve is connected to the input port through a first flow pipe.

[0010] As a preferred solution of the boiler expansion tank water quality sampling system of the present invention, two input ports are provided and one output port is provided.

[0011] As a preferred solution of the water quality sampling system for the boiler expansion tank of the present invention, the input end of the first valve is connected to the water outlet pipe.

[0012] As a preferred solution of the water quality sampling system for the boiler expansion tank of the present invention, the output module includes a second flow pipe connected to the output port.

[0013] As a preferred solution of the boiler expansion tank water quality sampling system of the present invention, a fourth valve is provided on the second flow pipe, the testing module includes a sampling testing room, and the water sample enters the sampling testing room through the second flow pipe.

[0014] One of the beneficial effects of the present invention is that the water sample in the boiler expansion tank is taken out, passed through the input module and then enters the collector. When testing is required, the fourth valve is opened so that the water sample passes through the output module and enters the testing module. The overall setting is convenient to operate, avoiding the disadvantages of manual sampling that may cause burns, etc., and the double-branch design of the input module can increase the service life of the overall equipment and facilitate maintenance.

[0015] In view of the above problems, the operating method of the present invention is proposed.

[0016] As a preferred embodiment of the operating method described in the present invention, there is provided: an operating method, which includes a boiler expansion tank water quality sampling system; and confirming that each module in the inspection unit is in good condition; controlling the opening of the valve; the water sample flows out of the boiler expansion tank, passes through the collector, and enters the sampling and testing room.

[0017] As a preferred embodiment of the operating method of the present invention, the collected water samples are subjected to water quality analysis, the test results are recorded, compared with water quality standards, and the water quality is evaluated.

[0018] Another beneficial effect of the present invention is that the sampling and testing operation process is simple through the equipment. After the water samples are collected, the collected water samples are sent to the sampling and testing room for water quality analysis. The water sample testing includes but is not limited to indicators such as pH value, dissolved oxygen, conductivity, hardness, etc. The relevant results are recorded and compared with the standard values ​​for analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing 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. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the inspection unit in the present invention.

[0021] Figure 2 It is a schematic diagram of the local structure of the input module in the present invention. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Example 1

[0027] Reference Figure 1 , which is the first embodiment of the present invention, and provides a boiler expansion tank water quality sampling system, wherein the detection unit 100 comprises a water level gauge pipeline module 101, an input module 102, a collection module 103, an output module 104 and a test module 105;

[0028] The water level gauge pipeline module 101 is connected to the boiler expansion tank. The water sample is taken out through the water level gauge pipeline module 101 and passes through the input module 102 to enter the collection module 103. The water sample flows out from the collection module 103 and passes through the output module, and finally enters the test module 105 to test the water sample.

[0029] The input module 102 is divided into two branches connected to the collection module 103 .

[0030] Figure 1 In the figure, G is the boiler expansion tank.

[0031] It should be noted that the function of the water level gauge in the water level gauge pipeline module 101 is to monitor the water level in the boiler in real time, ensure that the water level is within a safe operating range, and prevent accidents caused by lack of water or full water in the boiler.

[0032] The water level meter can draw water samples through its pipe system for water quality analysis.

[0033] Since the water level in the boiler will change with the operating status of the boiler, by setting pipes at different heights, that is, by setting a low water level pipe 101a and a high water level pipe 101b, the water level can be monitored and controlled more accurately to ensure that the boiler can operate safely and stably under various operating conditions. This helps to more accurately control the water level during the startup or shutdown of the boiler and avoid boiler damage caused by improper water level control.

[0034] In summary, through the combination of the water level meter pipeline module 101, the input module 102, the collection module 103, the output module 104 and the testing module 105, the water sample is taken out from the boiler expansion tank G, and then passes through each module in turn, is collected in the collection module 103, and finally enters the testing module 105 for testing the water quality, maintaining automation.

[0035] Example 2

[0036] Reference Figure 1-2 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the water level gauge pipeline module 101 includes a low water level pipeline 101a and a high water level pipeline 101b respectively connected to the boiler expansion tank; the water level gauge pipeline module 101 also includes an outlet pipeline 101c for passing the water sample into the input module 102.

[0037] The outlet pipe 101c is made of high-strength 304L 18-8 stainless steel containing 18% chromium and 8% nickel, and is installed with precision machining and welding technology. It has corrosion resistance and can maintain excellent stability and durability under high pressure and strong corrosion environments, thereby greatly extending the service life of the equipment and reducing the frequency of maintenance.

[0038] Preferably, the input module 102 includes two branches Q connected in parallel.

[0039] By setting up two parallel branches Q, that is, dividing the input module 102 into two, this setting can make one branch Q serve as the main pipeline and the other branch Q serve as the backup pipeline. When the main pipeline fails or needs maintenance, the system can still continue the sampling operation through the backup pipeline, thereby ensuring the continuity and reliability of the sampling process; not only that, when the main pipeline needs to be cleaned or parts need to be replaced, it can be switched to the backup pipeline without stopping the entire sampling process, which can reduce system downtime and improve work efficiency; and if the main pipeline leaks or other safety problems occur, the backup pipeline can be put into use immediately, thereby avoiding possible safety risks and environmental risks.

[0040] In addition, this design provides workers with another sampling operation mode, which allows them to choose to use the main pipeline and the backup pipeline alternately, reducing the wear of a single pipeline and thus extending the service life of the entire system.

[0041] In addition, if there is a problem with data collection during the use of the main pipeline, the backup pipeline can provide another set of data. By comparing the two sets of data, the accuracy and reliability of the data can be improved.

[0042] It should also be mentioned that under this setting, the backup pipeline can balance the pressure at both ends of the main pipeline to prevent the valve from being difficult to open or damaged due to excessive pressure difference; in high-pressure or large-diameter pipelines, pressure relief through the bypass valve can avoid the impact of sudden high-pressure influx on the downstream pipeline and protect the main valve from damage.

[0043] Preferably, each branch Q is connected in series by a first valve 102a, a second valve 102b and a third valve 102c in sequence through a connecting pipe 102d, one side of the second valve 102b is electrically connected to a control motor 102b-1, and the two branches Q are spaced 30cm apart.

[0044] The first valve 102a and the third valve 102c are fast-opening and fast-closing valves applicable to 400°C; the valves not only support fast switching operations, but also are ergonomically designed and can be operated with one hand, significantly reducing the complexity of on-site operations. At the same time, they are also convenient for daily maintenance and inspection of boilers in thermal power plants.

[0045] The second valve 102b is connected to the system automatic control program, and automatically takes samples and places them in the collector 103a according to the timing program. It is resistant to high temperature and corrosion, suitable for automatic discharge under high pressure environment, avoiding the complexity of manual operation and reducing the operation risk under high temperature and high pressure environment. Through this timing design, the system can effectively manage and control the processing flow of boiler water quality samples, and improve the degree of automation and safety of operation.

[0046] Through this series design, the second valve 102b controlled by the control motor 102b-1 is located between the first valve 102a and the third valve 102c, so that in an emergency, such as when the electric valve loses control or the system leaks, the operator can quickly close the front and rear valves to cut off the fluid and prevent the accident from expanding.

[0047] Preferably, the collection module 103 comprises a collector 103a having an input port M and an output port N, and the output end of the third valve 102c is connected to the input port M through a first flow pipe 102c-1.

[0048] The collector 103a is made of stainless steel, with the specifications of 40cm in length × 30cm in width × 30cm in height. The collector 103a takes samples at regular intervals through the second valve 102b, automatically collects water samples, and enters the sampling and testing room 105a, thereby reducing manual intervention and ensuring the continuity and real-time nature of water quality monitoring. The collector 103a has precise control functions, can accurately measure and store water samples, and provide highly reliable water quality data.

[0049] Preferably, two input ports M are provided and one output port N is provided.

[0050] Preferably, the input end of the first valve 102a is connected to the water outlet pipe 101c.

[0051] Preferably, the output module 104 includes a second flow pipe 104a communicating with the output port N.

[0052] Preferably, a fourth valve 104a-1 is provided on the second circulation pipeline 104a, and the testing module 105 includes a sampling and testing room 105a, and the water sample enters the sampling and testing room 105a through the second circulation pipeline 104a.

[0053] In summary, water samples are taken out from the boiler expansion tank G through the water outlet pipe 101c, and then pass through the input module 102. A dual-branch design is selected for coordinated use to increase the service life of the equipment. The water sample enters the collector 103a, and then the fourth valve 104a-1 is opened to output the water sample to the sampling and testing room 105a, thereby realizing automatic sampling and testing of water samples, avoiding the disadvantage of manual operation and reducing the risk of scalding.

[0054] Example 3

[0055] Reference Figure 1-2 , which is the third embodiment of the present invention. This embodiment is based on the previous embodiment, and the difference is that it confirms that each module in the inspection unit 100 is in a good state; the opening of the valve is controlled; the water sample flows out of the boiler expansion tank, passes through the collector 103a, and enters the sampling and testing room 105a.

[0056] Preferably, the collected water samples are analyzed for water quality, the test results are recorded, compared with water quality standards, and the quality of the water is evaluated.

[0057] After sampling, the water samples will be sent to the laboratory 105a for a series of tests, including but not limited to pH, dissolved oxygen, conductivity, total dissolved solids TDS, hardness, alkalinity, silicate and phosphate content, etc. This can reveal the corrosiveness, scaling tendency and stability in the water and evaluate the chemical state of the boiler water.

[0058] During the testing process, various instruments and equipment may be used, such as pH meters, conductivity meters, spectrometers, and chemical analysis kits. For example, the determination of pH can help determine the acidity and alkalinity of water to prevent corrosion of boiler metals. The determination of dissolved oxygen can prevent oxygen corrosion. The determination of hardness and alkalinity can help control boiler scaling. Analysis of test data usually involves comparing the test results with boiler water quality standards to determine whether the water treatment program needs to be adjusted, such as adding chemical treatment agents or performing blowdown operations.

[0059] During data recording and analysis, data trend monitoring can be performed to identify trends in water quality changes through long-term collected data, thereby predicting potential problems and taking preventive measures in a timely manner.

[0060] In addition, the test results are used to optimize boiler operating parameters such as pressure and temperature to improve thermal efficiency and reduce energy consumption; through this comprehensive water quality management and analysis, thermal power plants can ensure the long-term stable operation of the boiler system while reducing maintenance costs and improving power generation efficiency.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0063] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A boiler expansion tank water quality sampling system, characterized by: include, The detection unit (100) comprises a water level gauge pipeline module (101), an input module (102), a collection module (103), an output module (104) and a test module (105); The water level gauge pipeline module (101) is connected to the boiler expansion tank. The water sample is taken out through the water level gauge pipeline module (101), passes through the input module (102), and enters the collection module (103). The water sample flows out from the collection module (103), passes through the output module, and finally enters the test module (105) to test the water sample. The input module (102) is divided into two branches connected to the collection module (103).

2. The boiler expansion tank water quality sampling system according to claim 1, characterized in that: The water level gauge pipeline module (101) comprises a low water level pipeline (101a) and a high water level pipeline (101b) respectively connected to the boiler expansion tank; The water level meter pipeline module (101) also includes a water outlet pipeline (101c) for passing the water sample into the input module (102).

3. The boiler expansion tank water quality sampling system according to claim 2, characterized in that: The input module (102) comprises two branches (Q) connected in parallel, and each branch (Q) is respectively connected in series by a first valve (102a), a second valve (102b) and a third valve (102c) in sequence through a connecting pipe (102d), and one side of the second valve (102b) is electrically connected to a control motor (102b-1).

4. The boiler expansion tank water quality sampling system according to claim 3, characterized in that: The collection module (103) comprises a collector (103a) having an input port (M) and an output port (N), and the output end of the third valve (102c) is connected to the input port (M) via a first flow pipe (102c-1).

5. The boiler expansion tank water quality sampling system according to claim 4, characterized in that: The input port (M) is provided with two, and the output port (N) is provided with one.

6. The boiler expansion tank water quality sampling system according to claim 5, characterized in that: The input end of the first valve (102a) is in communication with the water outlet pipe (101c).

7. The boiler expansion tank water quality sampling system according to any one of claims 1 to 6, characterized in that: The output module (104) comprises a second flow pipe (104a) communicating with the output port (N).

8. The boiler expansion tank water quality sampling system according to claim 7, characterized in that: The second circulation pipe (104a) is provided with a fourth valve (104a-1), and the testing module (105) includes a sampling testing room (105a), and the water sample enters the sampling testing room (105a) through the second circulation pipe (104a).

9. An operating method, characterized in that: A boiler expansion tank water quality sampling system comprising any one of claims 1 to 8; and Confirming that each module in the inspection unit (100) is in good condition; Control the opening of the valve; The water sample flows out of the boiler expansion tank, passes through the collector (103a), and enters the sampling and testing room (105a).

10. The boiler expansion tank water quality sampling system according to claim 9, characterized in that: The collected water samples are analyzed for water quality, the test results are recorded, compared with water quality standards, and the quality of the water is evaluated.

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