Full-automatic steam quality detector

Abstract

The utility model relates to the technical field of steam quality detection, in particular to a full-automatic steam quality detector, which comprises a flow limiting device, a detector and a controller, the heating device is connected with the flow limiting device and used for heating the throttled steam to superheated steam; the heat exchange device is connected with the heating device and used for condensing the steam; the non-condensable gas measuring device is connected with the heat exchange device and is used for collecting non-condensable gas; the flow limiting device, the heating device, the heat exchange device and the non-condensable gas measuring device are all connected with the controller. According to the steam quality detection device, the steam quality detection structure is simplified.

Description

Technical Field

[0001] This utility model relates to the field of steam quality testing technology, specifically to a fully automatic steam quality tester. Background Technology

[0002] Steam quality is a crucial parameter in industrial production, directly impacting equipment efficiency, product quality, and operating costs. Superheat, non-condensable gas content, and dryness are three important parameters for steam quality testing.

[0003] Existing methods for detecting steam quality generally involve manual measurement. When measuring the content of non-condensable gases, it is necessary to calculate two consecutive readings of the liquid level. When measuring dryness, it is necessary to record the temperature inside the pipe and the thermos in real time and control the measurement time. The measurement steps are cumbersome, the calculations are complex, and the time consumption is lengthy. The skill level of the technicians has a great influence on the accuracy of the measurement results.

[0004] The steam quality detector disclosed in CN220649951U, while monitoring for steam leakage at the connection between the threaded sleeve and the threaded pipe through a leak warning mechanism, does not disclose the specific process of steam quality detection. Other existing steam quality detectors have more complex overall structures, more cumbersome operation processes, and higher costs. Furthermore, their throttling pipeline layouts cannot release steam to atmospheric pressure, leaving room for improvement and optimization. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a fully automatic steam quality tester.

[0006] The technical solution adopted in this application to solve its technical problem is: a fully automatic steam quality detector, including:

[0007] A flow-limiting device is used to reduce the pressure of the steam to be measured to atmospheric pressure;

[0008] A heating device, connected to a flow-limiting device, is used to heat throttled steam to superheated steam;

[0009] A heat exchanger, connected to a heating device, used to condense steam;

[0010] A non-condensable gas measuring device, connected to a heat exchanger, is used to collect non-condensable gases;

[0011] The flow limiting device, heating device, heat exchange device, and non-condensable gas measuring device are all connected to the controller.

[0012] The flow limiting device includes a steam expansion tube connected to a flow limiting terminal, and a first pressure sensor and a first temperature sensor are provided on the steam expansion tube.

[0013] The first pressure sensor and the first temperature sensor are connected to the controller.

[0014] The heating device includes a steam heating pipe connected to the steam expansion pipe, a heating device is installed inside the steam heating pipe, and a second temperature sensor is connected to the steam heating pipe.

[0015] The heating device and the second temperature sensor are connected to the controller.

[0016] The heating device is an electric heating rod, which is connected to a controller.

[0017] The electric heating rod is suspended inside the steam heating pipe, with one end of the electric heating rod extending through the steam expansion pipe and the electric heating rod being fixedly connected to the steam expansion pipe.

[0018] The heat exchange device includes a condensing device and a first row of pipes, the first row of pipes being connected to the outlet of the steam heating pipe through a first valve;

[0019] The inlet end of the condensing equipment is connected to the outlet of the steam heating pipe through a second valve;

[0020] The outlet of the condensing equipment is connected to the non-condensable gas measuring device, and a third temperature sensor is provided at the connection between the condensing equipment and the non-condensable gas measuring device.

[0021] The first valve, the second valve, the condensing equipment, and the third temperature sensor are connected to the controller.

[0022] The condensation device is an air-cooled cooler.

[0023] The non-condensable gas measuring device includes a non-condensable gas measuring cylinder, which is connected to a second pressure sensor;

[0024] The non-condensable gas measuring cylinder is equipped with an exhaust port and a drain port. The exhaust port of the non-condensable gas measuring cylinder is connected to a fourth valve, and the drain port of the non-condensable gas measuring cylinder is connected to the inlet end of the condensate measuring cylinder. The condensate measuring cylinder is connected to a third pressure sensor.

[0025] The outlet of the condensate measuring cylinder is connected to the second row of pipes via a third valve.

[0026] The first and second rows of pipes are connected to the outlet, through which steam and condensate are discharged.

[0027] Compared with the prior art, this application has the following beneficial effects:

[0028] This application realizes integrated, fully automated detection of steam quality indicators (including superheat, non-condensable gas content, and dryness), reducing the time spent on traditional manual detection and simplifying the tediousness of steam quality detection.

[0029] This application eliminates the need for liquid level difference, simplifies the measuring device, and increases measurement efficiency.

[0030] This application ensures that the pressure of the sampled steam can be released to atmospheric pressure after flow restriction when measuring superheat, which complies with relevant industry regulations. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the connection of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 2 .

[0034] In the diagram: 1. Flow limiting end; 2. First pressure sensor; 3. First temperature sensor; 4. Steam expansion tube; 5. Heating equipment; 6. Steam heating tube; 7. Second temperature sensor; 8. First valve; 9. Second valve; 10. Condensation equipment; 11. Third temperature sensor; 12. Second pressure sensor; 13. Third pressure sensor; 14. Non-condensable gas measuring cylinder; 15. Condensate measuring cylinder; 16. Fourth valve; 17. Third valve; 18. First row of pipes; 19. Second row of pipes. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Reference Figures 1-3 The fully automatic steam quality tester includes a controller, which is connected to a flow limiting device, a heating device, a heat exchange device, and a non-condensable gas measuring device.

[0039] The flow limiting device is used to reduce the pressure of the steam to be tested to atmospheric pressure; the flow limiting device includes a steam expansion tube 4, which is connected to a flow limiting end, and a first pressure sensor 2 and a first temperature sensor 3 are provided on the steam expansion tube 4.

[0040] The first pressure sensor 2 and the first temperature sensor 3 are connected to the controller.

[0041] The heating device is connected to the flow limiting device and is used to heat the throttled steam to superheated steam; the heating device includes a steam heating pipe 6, which is connected to the steam expansion pipe 4, a heating device 5 is installed inside the steam heating pipe 6, and a second temperature sensor 7 is connected to the steam heating pipe 6;

[0042] The heating device 5 and the second temperature sensor 7 are connected to the controller.

[0043] In this embodiment, the heating device 5 is an electric heating rod, which is connected to a controller.

[0044] The electric heating rod is suspended inside the steam heating pipe 6, with one end extending through the steam expansion pipe 4, and the electric heating rod is fixedly connected to the steam expansion pipe 4. In this embodiment, refer to... Figure 1 and Figure 3 The steam heating tube 6 and the steam expansion tube 4 are an integral structure. During installation, start the installation hole on the steam expansion tube 4, insert the electric heating rod through the steam expansion tube 4 and into the steam heating tube 6. The electric heating rod and the steam expansion tube 4 are installed and fixed based on the installation hole. High temperature resistant seals can be used at the installation point to ensure the sealing effect.

[0045] The heat exchange device is connected to the heating device and is used to condense steam; the heat exchange device includes a condensing device 10 and a first row of pipes 18, the first row of pipes 18 being connected to the outlet of the steam heating pipe 6 through a first valve 8;

[0046] The inlet end of the condensing device 10 is connected to the outlet of the steam heating pipe 6 through the second valve 9;

[0047] The outlet of the condensing device 10 is connected to the non-condensable gas measuring device, and a third temperature sensor 11 is provided at the connection between the condensing device 10 and the non-condensable gas measuring device.

[0048] The first valve 8, the second valve 9, the condensing device 10, and the third temperature sensor 11 are connected to the controller.

[0049] The third temperature sensor 11 is a temperature probe. The condensation device 10 is an air-cooled cooler.

[0050] Superheat detection requires sampled steam to be released to atmospheric pressure after passing through a flow-limiting orifice. This necessitates that the inner diameter of the pipes in the heating device, heat exchange device, and non-condensable gas measuring device downstream of the flow-limiting device be sufficiently large compared to the flow-limiting orifice. Designing the entire testing device as a single pipeline would be difficult to achieve. Therefore, a branch is added, controlled by a first valve 8, which opens separately during superheat testing to achieve accurate measurement.

[0051] The non-condensable gas measuring device is connected to the heat exchange device for collecting non-condensable gases; the non-condensable gas measuring device includes a non-condensable gas measuring cylinder 14, which is connected to a second pressure sensor 12.

[0052] The non-condensable gas measuring cylinder 14 is provided with an exhaust port and a drain port. The exhaust port of the non-condensable gas measuring cylinder 14 is connected to a fourth valve 16, and the drain port of the non-condensable gas measuring cylinder 14 is connected to the inlet end of the condensate measuring cylinder 15. The condensate measuring cylinder 15 is connected to a third pressure sensor 13.

[0053] The outlet of the condensate measuring cylinder 15 is connected to the second row of pipes 19 through the third valve 17.

[0054] The first row of pipes 18 and the second row of pipes 19 are connected to the outlet, through which steam and condensate are discharged.

[0055] In this embodiment, the first valve 8, the second valve 9, and the third valve 17 are all solenoid valves.

[0056] Operating principle: Open the first valve 8 and let the steam source to be tested pass into the steam expansion pipe 4 through the flow limiting end 1. The steam to be tested passes through the steam heating pipe 6, the first valve 8 and the first pipe 18 in sequence and is discharged, thus ensuring that the pressure of the steam to be tested is released to one atmosphere.

[0057] The first pressure sensor 2 acquires the pressure of the steam after flow restriction, and the superheat of the steam is measured based on the first temperature sensor 3.

[0058] Superheat refers to the difference between the steam temperature and its saturation temperature. Currently, it is stipulated that when supplying steam at reduced pressure to atmospheric pressure, the superheat should not exceed 25°C.

[0059] Close the first valve 8, open the second valve 9 and the heating device 5, heat the steam to superheated steam, the steam enters the condensing device 10, and after heat exchange and condensation, it enters the non-condensable gas measuring cylinder 14;

[0060] The accumulation of non-condensable gases causes a change in pressure inside the non-condensable gas measuring cylinder 14. After condensate enters the condensate measuring cylinder 15, the pressure inside the condensate measuring cylinder 15 also changes. The pressure values ​​before and after the change are measured by the corresponding pressure sensor. The content of non-condensable gases and the dryness of steam can be calculated according to the ideal gas equation. This application is mainly based on the simplification of the measurement process. The specific calculation process is not part of the design focus of this application, so it will not be described in detail.

[0061] This application employs a smaller non-condensable gas measuring cylinder 14 and a condensate measuring cylinder 15, along with two pressure sensors and one temperature sensor. The inlet and outlet of the non-condensable gas measuring cylinder 14 are positioned as close as possible. After cooling, steam enters the non-condensable gas measuring cylinder 14, where the non-condensable gases accumulate at the top. Condensate exits from the outlet of the non-condensable gas measuring cylinder 14 and enters the condensate measuring cylinder 15. The small size of the non-condensable gas measuring cylinder 14, combined with the pressure change caused by the accumulation of non-condensable gases, and the subsequent pressure change caused by the condensate entering the condensate measuring cylinder 15, allows for the calculation of the condensate volume and thus the measurement of the non-condensable gas content. This structural improvement simplifies the design, reduces costs, eliminates the need for liquid level difference measurements, and improves measurement efficiency.

[0062] The controller is connected to a human-machine interface. The controller compares the calculated superheat, non-condensable gas content and dryness with the corresponding specified ranges to generate test results. Interaction is performed through the human-machine interface, and the controller controls the operation of all components of the instrument.

[0063] Operators can obtain information such as the steam sampling point number, test date, and test results through the human-machine interface. The fully automatic steam quality tester can also store test results and implement functions such as access control, audit tracking, printing, and exporting of test results.

[0064] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A fully automatic steam quality tester, characterized in that, include A flow-limiting device is used to reduce the pressure of the steam to be measured to atmospheric pressure; A heating device, connected to a flow-limiting device, is used to heat steam to superheated steam; A heat exchanger, connected to a heating device, used to condense steam; A non-condensable gas measuring device, connected to a heat exchanger, is used to collect non-condensable gases; The flow limiting device, heating device, heat exchange device, and non-condensable gas measuring device are all connected to the controller.

2. The fully automatic steam quality detector according to claim 1, characterized in that, The flow limiting device includes a steam expansion tube (4), which is connected to a flow limiting terminal (1). A first pressure sensor (2) and a first temperature sensor (3) are provided on the steam expansion tube (4). The first pressure sensor (2) and the first temperature sensor (3) are connected to the controller.

3. The fully automatic steam quality detector according to claim 2, characterized in that, The heating device includes a steam heating pipe (6), which is connected to the steam expansion pipe (4). A heating device (5) is installed inside the steam heating pipe (6), and a second temperature sensor (7) is connected to the steam heating pipe (6). The heating device (5) and the second temperature sensor (7) are connected to the controller.

4. The fully automatic steam quality detector according to claim 3, characterized in that, The heating device (5) is an electric heating rod, which is connected to a controller.

5. The fully automatic steam quality tester according to claim 4, characterized in that, The electric heating rod is suspended inside the steam heating pipe (6), with one end of the electric heating rod extending through the steam expansion pipe (4), and the electric heating rod is fixedly connected to the steam expansion pipe (4).

6. The fully automatic steam quality detector according to claim 3, characterized in that, The heat exchange device includes a condenser (10) and a first row of pipes (18), the first row of pipes (18) being connected to the outlet of the steam heating pipe (6) through a first valve (8); The inlet end of the condensing device (10) is connected to the outlet of the steam heating pipe (6) through the second valve (9); The outlet of the condensing device (10) is connected to the non-condensable gas measuring device, and a third temperature sensor (11) is provided at the connection between the condensing device (10) and the non-condensable gas measuring device. The first valve (8), the second valve (9), the condenser (10), and the third temperature sensor (11) are connected to the controller.

7. The fully automatic steam quality detector according to claim 6, characterized in that, The condensation device (10) is an air-cooled cooler.

8. The fully automatic steam quality detector according to claim 6, characterized in that, The non-condensable gas measuring device includes a non-condensable gas measuring cylinder (14), which is connected to a second pressure sensor (12); The non-condensable gas measuring cylinder (14) is provided with an exhaust port and a drain port. The exhaust port of the non-condensable gas measuring cylinder (14) is connected to a fourth valve (16). The drain port of the non-condensable gas measuring cylinder (14) is connected to the inlet end of the condensate measuring cylinder (15). The condensate measuring cylinder (15) is connected to a third pressure sensor (13). The outlet of the condensate measuring cylinder (15) is connected to the second row of pipes (19) through the third valve (17).

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