Boiler feed water dissolved oxygen detection system

Abstract

The utility model provides a boiler feed water dissolved oxygen detection system which comprises a cooling device which comprises a deoxygenated water inlet pipeline, a deoxygenated water outlet pipeline, a cooling water inlet pipeline, a cooling water outlet pipeline and a heat exchanger. One end of the deoxygenated water inlet pipeline is connected with a deoxygenated water inlet in the heat exchanger, one end of the deoxygenated water outlet pipeline is connected with a deoxygenated water outlet in the heat exchanger, the other end of the deoxygenated water outlet pipeline is connected with the detection device, and the detection device is used for detecting the dissolved oxygen content of deoxygenated water; one end of the cooling water inlet pipeline is connected with a cooling water inlet in the heat exchanger, and one end of the cooling water outlet pipeline is connected with a cooling water outlet in the heat exchanger; a first electromagnetic valve is arranged on the deoxygenated water inlet pipeline, a second electromagnetic valve is arranged on the cooling water inlet pipeline, and the control unit is electrically connected with the first electromagnetic valve and the second electromagnetic valve. The problems of low detection efficiency and poor detection precision of boiler feed water dissolved oxygen in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler feed water, in particular to a boiler feed water dissolved oxygen detection system. Background Art

[0002] In the industrial boiler feed water system, the dissolved oxygen content of deoxygenated water is crucial to the normal operation of the boiler. Excessive dissolved oxygen content will cause corrosion and oxidation of the boiler, seriously affecting the life and efficiency of the boiler. Therefore, it is necessary to correctly monitor and control the dissolved oxygen content of deoxygenated water.

[0003] At present, there are some problems with the existing boiler feed water dissolved oxygen detection device. First, the traditional dissolved oxygen detection method requires manual operation, which is not only time-consuming and labor-intensive, but also has poor measurement accuracy and stability. Secondly, the existing device has a high temperature requirement for deoxygenated water and cannot accurately measure the oxygen content of deoxygenated water under high temperature conditions. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a boiler feed water dissolved oxygen detection system for solving the defects existing in the prior art in the detection of boiler feed water dissolved oxygen.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a boiler feed water dissolved oxygen detection system, including a cooling device, which includes a deoxygenated water inlet pipeline, a deoxygenated water outlet pipeline, a cooling water inlet pipeline, a cooling water outlet pipeline and a heat exchanger; wherein one end of the deoxygenated water inlet pipeline is connected to the deoxygenated water inlet on the heat exchanger, one end of the deoxygenated water outlet pipeline is connected to the deoxygenated water outlet on the heat exchanger, and the other end of the deoxygenated water outlet pipeline is connected to a detection device, and the detection device is used to detect the dissolved oxygen content of the deoxygenated water; one end of the cooling water inlet pipeline is connected to the cooling water inlet on the heat exchanger, and one end of the cooling water outlet pipeline is connected to the cooling water outlet on the heat exchanger; a first solenoid valve is provided on the deoxygenated water inlet pipeline, a second solenoid valve is provided on the cooling water inlet pipeline, and a control unit is electrically connected to the first solenoid valve and the second solenoid valve.

[0006] Preferably, the heat exchanger is a shell and tube heat exchanger.

[0007] Preferably, the detection device includes a fluorescent dissolved oxygen sensor, a processor communicatively connected to the fluorescent dissolved oxygen sensor, and a display communicatively connected to the processor, wherein the fluorescent dissolved oxygen sensor is used to detect the dissolved oxygen content of the deoxygenated water in real time, the processor is used to receive the detection signal of the fluorescent dissolved oxygen sensor and convert the detection signal into dissolved oxygen content data, and the display is used to display the dissolved oxygen content data.

[0008] Preferably, the detection device further comprises a communication module, and the communication module is used to send the dissolved oxygen content data to a remote terminal.

[0009] Preferably, the detection device further comprises a temperature compensation module, and the temperature compensation module is used to compensate the temperature of the deoxygenated water flowing from the deoxygenated water outlet pipeline to the detection device to 25°C.

[0010] Preferably, the detection device further comprises a pH value compensation module, and the pH value compensation module is used to compensate the pH value of the deoxygenated water flowing from the deoxygenated water outlet pipeline to the detection device to 7.5.

[0011] Preferably, the deoxygenated water inlet pipeline includes a first main pipeline and a first branch pipeline, the first branch pipeline is located on one side of the first main pipeline, and both ends of the first branch pipeline are connected to the first main pipeline, the first solenoid valve is arranged on the first branch pipeline, and a first on-off valve is provided on the first main pipeline and between the two ends of the first branch pipeline; and a first main on-off valve is also provided on the first main pipeline and in front of the first on-off valve.

[0012] Preferably, the cooling water inlet pipeline includes a second main pipeline and a second branch pipeline, the second branch pipeline is located on one side of the second main pipeline, and both ends of the second branch pipeline are connected to the second main pipeline, the second solenoid valve is arranged on the second branch pipeline, a second on-off valve is provided on the second main pipeline and between the two ends of the second branch pipeline, and a second main on-off valve is also provided on the second main pipeline and in front of the second on-off valve.

[0013] Preferably, the deoxygenated water outlet pipeline includes a first outlet pipeline and a second outlet pipeline, and a third on-off valve and a fourth on-off valve are respectively provided on the first outlet pipeline and the second outlet pipeline, wherein the first outlet pipeline is connected to the detection device.

[0014] As described above, the boiler feed water dissolved oxygen detection system of the utility model has the following beneficial effects: the on and off of the first solenoid valve and the second solenoid valve are controlled by the control unit, thereby realizing automatic control of the supply detection of deoxygenated water, and the deoxygenated water is cooled by heat exchange after passing through the heat exchanger, and then the cooled deoxygenated water flows out from the deoxygenated water outlet pipeline to the detection device for detection of dissolved oxygen content. Compared with the prior art, the boiler feed water dissolved oxygen detection system of the utility model can realize automatic measurement of boiler feed water (deoxygenated water), improve the detection efficiency and the detection accuracy and stability of deoxygenated water. At the same time, through the setting of the heat exchanger, the temperature of the deoxygenated water can be reduced, and the accuracy of the detection of the dissolved oxygen content of the deoxygenated water is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a structural schematic diagram of a boiler feed water dissolved oxygen detection system provided by the utility model.

[0016] Description of Reference Numerals

[0017] 10 Cooling device

[0018] 101 Deoxygenated water inlet pipeline

[0019] 102 Deoxygenated water outlet pipeline

[0020] 103 Cooling water inlet pipeline

[0021] 104 Cooling water outlet pipe

[0022] 1010 First Main Road

[0023] 1011 First branch line

[0024] 101a First main on-off valve

[0025] 101b First on-off valve

[0026] 11 First solenoid valve

[0027] 1030 Second Main Road

[0028] 1031 Second branch line

[0029] 103a Second main on-off valve

[0030] 103b Second on-off valve

[0031] 12 Second solenoid valve

[0032] 1021 First water outlet pipe

[0033] 1022 Second water outlet pipe

[0034] 102a The third on-off valve

[0035] 102b Fourth on-off valve

[0036] 100 Heat Exchanger

[0037] 20 Detection device

[0038] 30 Control unit DETAILED DESCRIPTION

[0039] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] See also Figure 1 It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] The utility model provides a boiler feed water dissolved oxygen detection system, such as Figure 1 As shown, the detection system includes a cooling device 10, a detection device 20 and a control unit 30, wherein the cooling device 10 includes a deoxygenated water inlet pipeline 101, a deoxygenated water outlet pipeline 102, a cooling water inlet pipeline 103, a cooling water outlet pipeline 104 and a heat exchanger 100, wherein one end of the deoxygenated water inlet pipeline 101 is connected to the deoxygenated water inlet of the heat exchanger 100, one end of the deoxygenated water outlet pipe 102 is connected to the deoxygenated water outlet of the heat exchanger 100, and the other end of the deoxygenated water outlet pipe 102 is connected to the deoxygenated water outlet of the heat exchanger 100. The end is connected to the detection device 20, which is used to detect the dissolved oxygen content of the deoxygenated water. One end of the cooling water inlet pipeline 103 is connected to the cooling water inlet on the heat exchanger 100, and one end of the cooling water outlet pipeline 104 is connected to the cooling water outlet on the heat exchanger 100; specifically, a first solenoid valve 11 is provided on the deoxygenated water inlet pipeline 101, and a second solenoid valve 12 is provided on the cooling water inlet pipeline 103, and the first solenoid valve 11 and the second solenoid valve 12 are both electrically connected to the control unit 30.

[0044] When the boiler feed water dissolved oxygen detection system of the utility model is used, the control unit 30 controls the on and off of the first solenoid valve 11 on the deoxygenated water inlet pipeline 101 and the second solenoid valve 12 on the cooling water inlet pipeline 103, thereby realizing automatic control of the supply and detection of deoxygenated water. After the deoxygenated water and the cooling water pass through the heat exchanger 100, the deoxygenated water is cooled by heat exchange, and then the cooled deoxygenated water flows out from the deoxygenated water outlet pipeline 102 to the detection device 20 for detection of dissolved oxygen content. Compared with the prior art in which deoxygenated water is manually taken and then sent to the detection device for measurement, the boiler feed water dissolved oxygen detection system of the utility model can realize automatic measurement of boiler feed water (deoxygenated water), and also avoids the contact between deoxygenated water and air, thereby improving the detection efficiency and the detection accuracy of deoxygenated water. At the same time, through the setting of the heat exchanger, the temperature of the deoxygenated water can be reduced, and the accuracy of the detection of the dissolved oxygen content of the deoxygenated water is further improved.

[0045] Specifically, in this embodiment, the heat exchanger 100 is a shell and tube heat exchanger, that is, the shell and tube heat exchanger includes a shell side and a tube side. During detection, cooling water flows in the shell side and deoxygenated water flows in the tube side. Thus, heat exchange between cooling water and deoxygenated water is achieved through the flow of cooling water in the shell side and the flow of deoxygenated water in the tube side, thereby achieving cooling of the deoxygenated water.

[0046] Specifically, when performing the detection, the control unit 30 first controls the second solenoid valve 12 on the cooling water inlet pipe 103 to open, that is, first introduces cooling water into the heat exchanger 100 to eliminate the problem of increased cooling water temperature due to increased ambient temperature, thereby ensuring that the cooling water can effectively reduce the temperature of the deoxygenated water. After waiting for twenty minutes, the first solenoid valve 11 on the deoxygenated water inlet pipe 101 is opened to introduce deoxygenated water into the heat exchanger 100. After heat exchange in the heat exchanger 100, the deoxygenated water flows out from the deoxygenated water outlet pipe 102 to the detection device 20.

[0047] Furthermore, in the present embodiment, the detection device 20 includes a fluorescent dissolved oxygen sensor, a processor and a display, wherein the fluorescent dissolved oxygen sensor is communicatively connected to the processor, and the processor is communicatively connected to the display. During detection, the detection device 20 detects the dissolved oxygen content of the deoxygenated water flowing from the deoxygenated water outlet pipe 102 to the detection device in real time through the fluorescent dissolved oxygen sensor, and the fluorescent dissolved oxygen sensor transmits the detected detection signal of the dissolved oxygen content to the processor, and the processor converts the received detection signal of the dissolved oxygen content into dissolved oxygen content data, and the processor transmits the dissolved oxygen content data to the display, and the display displays the dissolved oxygen content data. Through this structural design, the detection personnel can intuitively monitor the current dissolved oxygen content.

[0048] Preferably, in this embodiment, the monitoring device 20 also includes a communication module, which is also communicatively connected to the processor. The communication module is used to send dissolved oxygen content data to a remote terminal. Through this design, remote monitoring and control can be supported, and real-time data can be transmitted to the monitoring center or the operator's equipment through a network connection to achieve remote management and operation.

[0049] Preferably, in this embodiment, the detection device 20 further includes a temperature compensation module, which is used to compensate the temperature of the deoxygenated water flowing from the deoxygenated water outlet pipe 102 to the detection device 20 to 25° C. Through this structural design, that is, by measuring the dissolved oxygen content of the deoxygenated water at the same temperature, the detection is more accurate.

[0050] Preferably, in this embodiment, the detection device 20 further includes a pH value compensation module, which is used to compensate the pH value of the deoxygenated water flowing from the deoxygenated water outlet pipe 102 to the detection device 20 to 7.5. Through this design, that is, by measuring the dissolved oxygen content of the deoxygenated water under the same pH value environment, the accuracy and stability of the detection can be further improved, and the interference of other factors on the detection can be avoided.

[0051] Specifically, during detection, the detection device generates a dissolved oxygen content value per second, and after 300 dissolved oxygen content values ​​are generated (i.e., after five minutes), the average value of the 300 dissolved oxygen content values ​​is taken as the dissolved oxygen content value in the time period, thereby making the detected dissolved oxygen content value more accurate.

[0052] Preferably, Figure 1 As shown, in this embodiment, the deoxygenated water inlet pipeline 101 also includes a first main pipeline 1010 and a first branch pipeline 1011. The first branch pipeline 1011 is located on one side of the first main pipeline 1010, and both ends of the first branch pipeline 1011 are connected to the first main pipeline 1010. Specifically, the first solenoid valve 11 is arranged on the first branch pipeline 1011, and a first on-off valve 101b is arranged on the first main pipeline 1010 and between the two ends of the first branch pipeline 1011. A first main on-off valve 101a is also arranged on the first main pipeline 1010 and in front of the first on-off valve 101b. And as Figure 1 As shown, the first main on-off valve 101a is located outside the two ends of the first branch pipeline 1011. Through this structural design, during normal operation, the first main on-off valve 101a is in a normally open state, and the first on-off valve 101b is in a normally closed state, so that the control unit 30 controls the opening and closing of the first electromagnetic valve 11 to automatically deliver deoxygenated water to the detection device, thereby performing automatic detection. When the first electromagnetic valve 11 fails, the opening and closing of the first on-off valve 101b can be manually controlled for detection. And through the setting of the first main on-off valve 101a, the delivery of deoxygenated water can be cut off by closing the first main on-off valve 101a, thereby facilitating the maintenance of the first electromagnetic valve or the first on-off valve.

[0053] Preferably, Figure 1 As shown, in this embodiment, the cooling water inlet pipeline 103 includes a second main pipeline 1030 and a second branch pipeline 1031, the second branch pipeline 1031 is located at one side of the second main pipeline 1030, and both ends of the second branch pipeline 1031 are connected to the second main pipeline 1030, the second solenoid valve 12 is arranged on the second branch pipeline 1031, a second on-off valve 103b is arranged on the second main pipeline 1030 and between the two ends of the second branch pipeline 1031, and a second main on-off valve 103a is also arranged on the second main pipeline 1030 and in front of the second on-off valve 103b. And as Figure 1 As shown, the second main on-off valve 103a is located outside the two ends of the second branch pipeline 1031. The structural design and beneficial effects of the cooling water inlet pipeline 103 are the same as those of the deoxygenated water inlet pipeline 101, so they will not be repeated here.

[0054] Preferably, Figure 1As shown, in this embodiment, the deoxygenated water outlet pipeline 102 includes a first outlet pipeline 1021 and a second outlet pipeline 1022. A third on-off valve 102a is provided on the first outlet pipeline 1021, and a fourth on-off valve 102b is provided on the second outlet pipeline 1022. Specifically, the first outlet pipeline 1021 is connected to the detection device. Through this structural design, that is, by setting up two deoxygenated water outlet pipelines, during the detection process, the detection personnel can also manually take samples from the second outlet pipeline 1022 for detection as needed.

[0055] Furthermore, in this embodiment, the detection device 20 also includes some additional functions, such as data recording and alarm functions. The system is equipped with a data recording module, which can save the data of each measurement in the memory for subsequent analysis and inspection. At the same time, the system also sets an alarm threshold. When the dissolved oxygen concentration exceeds or falls below the set safety range, an alarm signal will be triggered to remind the operator to take timely measures for adjustment and processing.

[0056] In summary, the boiler feed water dissolved oxygen detection system of the utility model can realize the automatic measurement of boiler feed water (deoxygenated water), and improve the detection efficiency and the detection accuracy and stability of deoxygenated water. At the same time, it can monitor the dissolved oxygen content of boiler feed water (deoxygenated water) in real time, so that the dissolved oxygen content of the deoxygenated water entering the boiler is guaranteed to be within a safe and normal range, thereby preventing boiler corrosion, extending the service life of the boiler, and improving the operating efficiency of the boiler. At the same time, the detection system has a simple structure, is easy to install and maintain, and is suitable for industrial boiler feed water systems of various sizes. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A boiler feed water dissolved oxygen detection system, characterized in that: include: A cooling device, comprising a deoxygenated water inlet pipeline, a deoxygenated water outlet pipeline, a cooling water inlet pipeline, a cooling water outlet pipeline and a heat exchanger; wherein one end of the deoxygenated water inlet pipeline is connected to the deoxygenated water inlet of the heat exchanger, one end of the deoxygenated water outlet pipeline is connected to the deoxygenated water outlet of the heat exchanger, and the other end of the deoxygenated water outlet pipeline is connected to a detection device, and the detection device is used to detect the dissolved oxygen content of the deoxygenated water; one end of the cooling water inlet pipeline is connected to the cooling water inlet of the heat exchanger, and one end of the cooling water outlet pipeline is connected to the cooling water outlet of the heat exchanger; The deoxygenated water inlet pipeline is provided with a first solenoid valve, the cooling water inlet pipeline is provided with a second solenoid valve, and a control unit, and the control unit is electrically connected to the first solenoid valve and the second solenoid valve.

2. A boiler feed water dissolved oxygen detection system according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger.

3. A boiler feed water dissolved oxygen detection system according to claim 1, characterized in that: The detection device includes a fluorescent dissolved oxygen sensor, a processor communicatively connected to the fluorescent dissolved oxygen sensor, and a display communicatively connected to the processor, wherein the fluorescent dissolved oxygen sensor is used to detect the dissolved oxygen content of deoxygenated water in real time, the processor is used to receive the detection signal of the fluorescent dissolved oxygen sensor and convert the detection signal into dissolved oxygen content data, and the display is used to display the dissolved oxygen content data.

4. A boiler feed water dissolved oxygen detection system according to claim 3, characterized in that: The detection device also includes a communication module, and the communication module is used to send the dissolved oxygen content data to a remote terminal.

5. A boiler feed water dissolved oxygen detection system according to claim 3, characterized in that: The detection device further comprises a temperature compensation module, which is used to compensate the temperature of the deoxygenated water flowing from the deoxygenated water outlet pipeline to the detection device to 25°C.

6. A boiler feed water dissolved oxygen detection system according to claim 5, characterized in that: The detection device further comprises a pH value compensation module, and the pH value compensation module is used to compensate the pH value of the deoxygenated water flowing from the deoxygenated water outlet pipeline to the detection device to 7.

5.

7. A boiler feed water dissolved oxygen detection system according to claim 1, characterized in that: The deoxygenated water inlet pipeline includes a first main pipeline and a first branch pipeline, the first branch pipeline is located on one side of the first main pipeline, and both ends of the first branch pipeline are connected to the first main pipeline, the first solenoid valve is arranged on the first branch pipeline, and a first on-off valve is arranged on the first main pipeline and between the two ends of the first branch pipeline; and a first main on-off valve is also arranged on the first main pipeline and in front of the first on-off valve.

8. A boiler feed water dissolved oxygen detection system according to claim 1, characterized in that: The cooling water inlet pipeline includes a second main pipeline and a second branch pipeline, the second branch pipeline is located on one side of the second main pipeline, and both ends of the second branch pipeline are connected to the second main pipeline, the second solenoid valve is arranged on the second branch pipeline, a second on-off valve is arranged on the second main pipeline and between the two ends of the second branch pipeline, and a second main on-off valve is also arranged on the second main pipeline and in front of the second on-off valve.

9. A boiler feed water dissolved oxygen detection system according to claim 1, characterized in that: The deoxygenated water outlet pipeline includes a first outlet pipeline and a second outlet pipeline, and a third on-off valve and a fourth on-off valve are respectively provided on the first outlet pipeline and the second outlet pipeline, wherein the first outlet pipeline is connected to the detection device.

Images