Multi-stage condensing device for measuring superheated steam flow

Abstract

The utility model relates to a multi-stage condensing device for measuring superheated steam flow, and belongs to the technical field of fluid measurement. The device is mainly composed of a differential pressure type transmitter, a condensation tank, a condensation ring, a gate valve and the like, particularly relates to a device for high-precision measurement of superheated steam flow, and solves the problems of inaccurate measurement of superheated steam flow, easy damage, high maintenance cost and the like in a high-temperature and high-pressure environment in the prior art. The condensation ring is arranged on the pressure guide pipe for primary cooling, superheated steam enters the condensation tank to further reduce the temperature of the steam, and condensed water enters the differential pressure type transmitter, so that accurate measurement is realized. The design not only improves the measurement precision and reliability, but also reduces the maintenance cost, and has wide application prospects and remarkable social and economic benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of steam measurement, in particular to a multi-stage condensation device for measuring the flow of superheated steam. Background Art

[0002] In the industrial production process, superheated steam is an indispensable and extremely challenging medium, and the accurate measurement of its flow rate has always been a crucial technical problem. Superheated steam, with its unique characteristics of high temperature, high pressure, high flow rate and easy condensation, not only provides a strong driving force for industrial production, but also places extremely high demands on flow measurement technology. Traditional flow measurement equipment often seems powerless and has many limitations when facing these extreme conditions. Specifically, high temperature is the primary challenge that superheated steam brings to flow measurement. Excessive steam temperature can easily cause damage to key components such as transmitters in flow measurement equipment, thereby affecting the measurement accuracy and the service life of the equipment. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a multi-stage condensing device for measuring the flow of superheated steam, so as to achieve high-precision, high-stability and continuous high-temperature steam pipeline flow measurement.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A multi-stage condensing device for measuring superheated steam flow rate, wherein a first root valve and a second root valve are respectively provided at both ends of a steam pipeline to be measured, condensing devices are respectively provided near the first root valve and the second root valve, and a differential pressure transmitter is provided between the condensing devices at both ends.

[0006] The above-mentioned condensing device includes a first condensing ring and a first condensing tank arranged in sequence according to the flow direction on the first root valve side, and a second condensing tank and a second condensing ring arranged in sequence according to the flow direction on the second root valve side, and the differential pressure transmitter is located between the first condensing tank and the second condensing tank.

[0007] A first gate valve is provided between the first condensation tank and the differential pressure transmitter.

[0008] A second gate valve is provided between the second condensation tank and the differential pressure transmitter.

[0009] A throttling orifice plate is arranged in the above-mentioned steam pipe.

[0010] A multi-stage condensation device for measuring the flow rate of superheated steam provided by the present utility model is optimized and designed for the special properties of superheated steam. Through a multi-stage cooling and protection structure and remote communication monitoring at the same time, the limitations of traditional flow measurement devices in high-temperature and high-pressure environments are overcome, and high-precision, high-stability, and continuous flow measurement are achieved. It has the following beneficial effects:

[0011] 1. High-precision measurement: Through the dual condensation effects of the condensation tank and the condensation ring, the steam temperature is reduced, the influence of thermal shock on the measuring element is reduced, and the measurement accuracy is improved.

[0012] 2. Good stability: The differential pressure transmitter and other components made of high-temperature and corrosion-resistant materials ensure the stable operation of the device in high-temperature and high-pressure environments.

[0013] 3. Low maintenance cost: The device is designed with fewer equipment, reducing the failure points and the maintenance cost.

[0014] 4. Wide application range: It can be widely applied to the measurement of superheated steam flow rate in industries such as petroleum, chemical industry, and electric power. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] In the figure: the first root valve 1, the first condensation ring 2, the first condensation tank 3, the first gate valve 4, the differential pressure transmitter 5, the second gate valve 6, the second condensation tank 7, the second condensation ring 8, the second root valve 9, the orifice plate 10, and the steam pipeline 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] As Figure 1 shown in, a multi-stage condensation device for measuring the flow rate of superheated steam is provided with a first root valve 1 and a second root valve 9 at both ends of the steam pipeline 11 to be measured, condensation devices are respectively provided near the first root valve 1 and the second root valve 9, and a differential pressure transmitter 5 is provided between the condensation devices at both ends.

[0019] The steam in the steam pipeline is diverted to the measurement location through the first root valve 1 and the second root valve 9 for condensation and then flows through the differential pressure transmitter 5 for differential pressure measurement, and then the actual flow rate of the steam is calculated.

[0020] The above-mentioned condensation device includes a first condensation ring 2 and a first condensation tank 3 arranged in sequence according to the flow direction on the side of the first root valve 1, and a second condensation tank 7 and a second condensation ring 8 arranged in sequence according to the flow direction on the second root valve 9, and the differential pressure transmitter 5 is located between the first condensation tank 3 and the second condensation tank 7.

[0021] A first gate valve 4 is provided before the above-mentioned first condensate tank 3 and differential pressure transmitter 5.

[0022] A second gate valve 6 is provided before the above-mentioned second condensate tank 7 and differential pressure transmitter 5.

[0023] A throttle orifice plate 10 is provided in the above-mentioned steam pipeline 11.

[0024] Embodiment:

[0025] A multi-stage condensation device for measuring the flow rate of superheated steam, the material of the pressure guiding pipe is 316 stainless steel pipe, which is used to connect various components, including steam inlet pipeline, outlet pipeline, differential pressure transmitter, root valve, gate valve and other accessories, to ensure the overall sealing and safety of the device.

[0026] A root valve is adopted. The root valve can be a needle valve. The needle valve has the characteristics of high adjustment accuracy and good sealing performance, and is suitable for fine adjustment of steam flow rate.

[0027] A condensation ring is adopted. It is arranged behind the root valve at the inlet of superheated steam. The condensation ring can increase the contact area between steam and the condensation medium, and ensure that the steam temperature entering the differential pressure transmitter is within the safe range.

[0028] A condensate tank is adopted, which is connected in the middle of the differential pressure transmitter and the condensation ring, and is used to pre-condense superheated steam into liquid water, further promoting the steam condensation process, reducing the steam temperature, and reducing the thermal shock to the measuring element.

[0029] A differential pressure transmitter is adopted. As the core component of flow measurement, the differential pressure transmitter calculates the steam flow rate by measuring the differential pressure generated before and after the steam flows through the pipeline and out of the condensate tank.

[0030] Hand valves are set before and after the differential pressure transmitter, which are convenient for pipeline sewage discharge and maintenance of the differential pressure transmitter. A temperature and pressure compensation control unit is designed. Its main function is a program that automatically adjusts and compensates for measurement errors caused by temperature and pressure changes during the measurement process. This unit is completed on the DCS configuration.

[0031] Using communication, the differential pressure signal of the differential pressure transmitter is converted into a 4-20 mA signal, and remote real-time monitoring is carried out through the DCS.

[0032] Working principle:

[0033] 1. As mentioned above, existing steam flow meters are prone to damage and inaccurate measurement in high-temperature environments. Especially after attempting to use a single condensation tank, it was found that the temperature was still as high as 139°C, and the steam could not be effectively condensed, thus seriously affecting the measurement accuracy. This design innovatively introduces a multi-stage condensation structure. Through multi-stage condensation, the steam temperature is gradually reduced and finally controlled within 50°C, providing a more suitable working environment for the measurement transmitter. The multi-stage condensation structure not only enhances the condensation effect but also significantly improves the measurement accuracy of the steam flow and effectively extends the service life of the measurement transmitter;

[0034] 2. Before the normal operation of the device, as Figure 1 shown, first close the root valves 1 and 9, and the gate valves 4 and 6, and conduct steam pipeline purging to remove impurities in the steam pipeline to prevent them from entering the transmitter and affecting the measurement;

[0035] 3. After the purging is qualified, open the root valves 1 and 9 to allow steam to enter the condensation system. After observing that there is condensate water in the condensation tank, it indicates that the condensation system is working normally. Then open the gate valves 4 and 6. At this time, the steam condensate after passing through the condensation coil and the condensation tank enters the differential pressure transmitter, and the differential pressure transmitter makes an accurate measurement;

[0036] 4. The fully condensed steam (or the already condensed steam condensate) flows through the differential pressure transmitter. As the core component of flow measurement, the differential pressure transmitter measures the differential pressure generated by the change in the flow velocity of the steam (or condensate) in the pipeline. Similarly, in the condensation tank, it is converted into the differential pressure of the condensate water, and the actual flow rate of the steam is calculated using the relationship between the flow rate and the differential pressure;

[0037] 5. The temperature and pressure compensation unit designed on the DCS configuration ensures that the measurement process is not affected by the fluctuations of the steam temperature and pressure, ensuring the accuracy and stability of the measurement results;

[0038] 6. After the device is started and operates stably, continuously monitor the measurement data of the differential pressure transmitter through the DCS system. According to the feedback of the measurement results and the needs of the actual situation on-site, regularly check and maintain the working status of each component of the device to ensure its long-term stable operation.

Claims

1. A multi-stage condensation device for measuring the flow rate of superheated steam, characterized in that, At both ends of the steam pipeline (11) to be measured, a first root valve (1) and a second root valve (9) are respectively provided, and condensation devices are respectively provided near the first root valve (1) and the second root valve (9), and a differential pressure transmitter (5) is provided between the condensation devices at both ends.

2. The multi-stage condensation device for measuring the flow rate of superheated steam according to claim 1, characterized in that, The condensation device includes a first condensation loop (2) and a first condensation tank (3) arranged in sequence according to the flow direction on the side of the first root valve (1), and a second condensation tank (7) and a second condensation loop (8) arranged in sequence according to the flow direction on the second root valve (9), and the differential pressure transmitter (5) is located between the first condensation tank (3) and the second condensation tank (7).

3. The multi-stage condensation device for measuring the flow rate of superheated steam according to claim 2, characterized in that, A first gate valve (4) is provided before the first condensation tank (3) and the differential pressure transmitter (5).

4. A multi-stage condensation device for measuring the flow rate of superheated steam according to claim 3, characterized in that, A second gate valve (6) is provided before the second condensation tank (7) and the differential pressure transmitter (5).

5. A multi-stage condensation device for measuring the flow rate of superheated steam according to claim 4, characterized in that, A throttle orifice plate (10) is provided in the steam pipeline (11).

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