Steam flow metering device

Abstract

The utility model relates to a steam flow metering device, which comprises a composite pressure condensation part, a first pressure connection end and a second pressure connection end, the first pressure connection end comprises a first gas inlet and a first connection port, the second pressure connection end comprises a second gas inlet and a second connection port, and the first pressure is larger than the second pressure; and the pressure difference transmitter is connected with the first connecting port of the first pressure connecting end of the composite pressure condensation part or the second connecting port of the second pressure connecting end of the composite pressure condensation part. According to the utility model, errors caused by manual installation of the steam flow metering device can be effectively avoided, the metering accuracy of the steam flow metering device at high temperature can be effectively improved, the measurement precision of the differential pressure transmitter can be improved, the temperature of the steam flow metering device can be reduced, and the influence of high-temperature steam on the differential pressure transmitter can be effectively improved. And the service life of the differential pressure transmitter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of measurement technology, in particular to a steam flow metering device. BACKGROUND

[0002] In the production and purification process of gas well, the flow meter applied is more, which is convenient for operation personnel to master the actual working condition of the scene and to optimize adjustment at any time.

[0003] The patent with the publication number CN201964911U discloses an integrated orifice plate flow meter, which comprises a concave orifice plate, a pressure guide plate, a condenser, a three-valve group and a differential pressure transmitter, wherein the concave orifice plate is connected with the pressure guide plate; the pressure guide plate is connected with the condenser, and the pressure guide plate and the condenser are both closed rectangular shapes, which are used to guide the medium flow into the condenser for condensation; the three-valve group is connected between the condenser and the differential pressure transmitter, and the differential pressure transmitter is provided with an exhaust valve.

[0004] However, in the process of detecting the flow of high-temperature steam, the gasket at the connection of the differential pressure transmitter connected with the flow meter often deforms due to heat, and the diaphragm is damaged. This not only greatly shortens the service life of the differential pressure transmitter, but also makes the orifice plate flow meter for high-temperature steam inaccurate in measurement and greatly fluctuates during use, which affects the correct judgment of the actual situation of the scene by the operators in the central control room and easily leads to missing the opportunity to adjust the parameters in time, thereby affecting the normal purification of raw gas. UTILITY MODEL CONTENT

[0005] The utility model provides a steam flow metering device, which can solve the technical problems of heat deformation of the gasket at the connection of the differential pressure transmitter connected with the flow meter, damage of the diaphragm, shortening of the service life of the differential pressure transmitter, inaccurate measurement of the orifice plate flow meter for high-temperature steam and great fluctuation during use in the process of detecting the flow of high-temperature steam.

[0006] The utility model provides a steam flow metering device, which comprises a composite pressure condensing part having a first pressure connecting end and a second pressure connecting end, wherein the first pressure connecting end comprises a first gas inlet and a first connecting port, the second pressure connecting end comprises a second gas inlet and a second connecting port, and the first pressure is greater than the second pressure.

[0007] A differential pressure transmitter is connected with the first connecting port of the first pressure connecting end or the second connecting port of the second pressure connecting end of the composite pressure condensing part.

[0008] In an embodiment, the composite pressure condensing part comprises a first pressure condenser and a second pressure condenser.

[0009] The first pressure condenser and the second pressure condenser are arranged side by side and integrated into one body.

[0010] The first pressure condenser is provided with the first gas inlet and the first connecting port on the side thereof, and the second pressure condenser is provided with the second gas inlet and the second connecting port on the side thereof.

[0011] The first pressure condenser is used to be connected with the steam pipeline through the first connecting port when the steam pressure is greater than the preset pressure, and the second pressure condenser is used to be connected with the steam pipeline through the second connecting port when the steam pressure is less than the preset pressure.

[0012] In an embodiment, the composite pressure condensing part further comprises an integrated plate, and the first pressure condenser and the second pressure condenser are integrated as a whole through the integrated plate.

[0013] In an embodiment, the first pressure condenser has a plurality of first perforated baffles stacked and arranged at intervals along the extending direction of the composite pressure condensing part, and the plurality of first perforated baffles are arranged between the first gas inlet and the first connecting port; the second pressure condenser has a plurality of second perforated baffles stacked and arranged at intervals along the extending direction of the composite pressure condensing part, and the plurality of first perforated baffles are arranged between the second gas inlet and the second connecting port; wherein the number of the plurality of first perforated baffles is the same as the number of the plurality of second perforated baffles and is arranged one-to-one, and the height of the first perforated baffle and the corresponding second perforated baffle in the extending direction of the composite pressure condensing part is the same.

[0014] In an embodiment, the first perforated baffle and the second perforated baffle are both in the shape of a broken line and comprise a plurality of angles, and the angle of each angle is 70°-120°.

[0015] In an embodiment, the number of the first perforated baffles is more than the number of the second perforated baffles.

[0016] In an embodiment, the bottom of the first pressure condenser is further provided with a first blowdown valve, and the bottom of the second pressure condenser is further provided with a second blowdown valve.

[0017] In an embodiment, the top of the first pressure condenser is further provided with a first vent valve, and the top of the second pressure condenser is further provided with a second vent valve.

[0018] In an embodiment, further comprising: at least two groups of gate valves located between the composite pressure condensing part and the steam pipeline.

[0019] In an embodiment, the differential pressure transmitter is provided with a five-valve group, and the composite pressure condensing part is connected with the five-valve group of the differential pressure transmitter.

[0020] Compared with the prior art, the steam flow metering device has the advantages that the composite pressure condensing part is additionally arranged in front of the differential pressure transmitter, the differential pressure transmitter is isolated from high-temperature steam, the purpose of reducing the temperature of the instrument is achieved, the first pressure connection end and the second pressure connection end are arranged on the composite pressure condensing part, the first pressure is greater than the second pressure, the steam pipelines with different pressures can be connected through the first pressure connection end and the second pressure connection end, the error caused by the manual installation of the steam flow metering device can be effectively avoided, the measurement accuracy of the steam flow metering device under high-temperature conditions is effectively improved, the first pressure condenser and the second pressure condenser are ensured to be on the same horizontal plane, the measurement accuracy of the differential pressure transmitter is improved, meanwhile, the differential pressure transmitter is isolated from high-temperature steam through the mode of additionally arranging the composite pressure condensing part in front of the differential pressure transmitter, the purpose of reducing the temperature of the steam flow metering device is achieved, the influence of high-temperature steam on the differential pressure transmitter is effectively improved, and the service life of the differential pressure transmitter is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be described in further detail below based on the embodiments and with reference to the drawings.

[0022] Figure 1 It is the structure schematic diagram of steam flow metering device in the embodiment of the utility model.

[0023] Figure 2 It is the assembly schematic diagram of steam flow metering device in the embodiment of the utility model.

[0024] Reference signs:

[0025] 1-composite pressure condensing part, 11-first pressure condenser, 111-first gas inlet, 112-first connecting port, 113-first perforated baffle, 114-first blowdown valve, 115-first vent valve, 12-second pressure condenser, 121-second gas inlet, 122-second connecting port, 123-second perforated baffle, 124-second blowdown valve, 125-second vent valve, 13-integrated plate, 2-gate valve, 3-differential pressure transmitter, 4-steam pipeline. DETAILED DESCRIPTION

[0026] The utility model will be described in further detail below based on the embodiments and with reference to the drawings.

[0027] In the production and purification process of gas well, the flow meter applied is more, which is convenient for operating personnel to master the actual working condition on site and to optimize and adjust at any time. Among them, the application of orifice plate flow meter is more widely, the pressure difference before and after the test orifice plate is tested, and the pressure signal is transmitted to the picture of distributed control system through the differential pressure transmitter and is displayed as a flow signal.

[0028] But in the process of detecting the flow of high temperature steam, the gasket of the differential pressure transmitter connected with the flow meter is often hot deformed, and the diaphragm is damaged. The main reason is that the high temperature causes the deformation of the connecting gasket of the differential pressure transmitter and the flow meter, which damages the internal structure of the differential pressure transmitter. This not only greatly shortens the service life of the differential pressure transmitter, but also causes the orifice plate flow meter of the high temperature steam to be inaccurate and fluctuate greatly during use, which affects the correct judgment of the actual situation of the scene by the operators in the control room, and easily leads to missing the opportunity to adjust the parameters in time, affecting the normal purification of the raw gas. Based on this, the steam flow metering device provided by the embodiments of the utility model can be suitable for the scene of high temperature steam metering.

[0029] Please refer to Figure 1 and Figure 2 The utility model discloses a steam flow metering device, comprising: composite pressure condensing part 1 and differential pressure transmitter 3, wherein, composite pressure condensing part 1 has first pressure connecting end and second pressure connecting end, wherein, first pressure connecting end includes first gas inlet 111 and first connecting port 112, second pressure connecting end includes second gas inlet 121 and second connecting port 122, and the first pressure is greater than the second pressure;Differential pressure transmitter 3 is connected with the first connecting port 112 of the first pressure connecting end or the second connecting port 122 of the second pressure connecting end of composite pressure condensing part 1.

[0030] The steam flow metering device provided by the embodiments of the utility model adds composite pressure condensing part 1 before the differential pressure transmitter, isolates the differential pressure transmitter from high temperature steam, so as to achieve the purpose of reducing the temperature of the instrument, and the composite pressure condensing part 1 has first pressure connecting end and second pressure connecting end, and the first pressure is greater than the second pressure, so that different pressure steam pipelines 4 can be connected through the first pressure connecting end and the second pressure connecting end, the error caused by the installation of the steam flow metering device can be effectively avoided, the measurement accuracy of the steam flow metering device under high temperature condition can be effectively improved, the first pressure condenser 11 and the second pressure condenser 12 are ensured to be on the same horizontal plane, the measurement accuracy of the differential pressure transmitter is improved, and at the same time, the differential pressure transmitter is isolated from high temperature steam by adding composite pressure condensing part 1 before the differential pressure transmitter, so as to achieve the purpose of reducing the temperature of the steam flow metering device, effectively improve the influence of high temperature steam on the differential pressure transmitter, and prolong the service life of the differential pressure transmitter.

[0031] In an alternative embodiment, the composite pressure condensing part 1 comprises a first pressure condenser 11 and a second pressure condenser 12; the first pressure condenser 11 and the second pressure condenser 12 are arranged side by side and integrated into one; the side of the first pressure condenser 11 is provided with a first gas inlet 111 and a first connecting port 112, and the side of the second pressure condenser 12 is provided with a second gas inlet 121 and a second connecting port 122; the first pressure condenser 11 is used to be connected with the steam pipe 4 through the first connecting port 112 when the steam pressure is greater than the preset pressure, and the second pressure condenser 12 is used to be connected with the steam pipe 4 through the second connecting port 122 when the steam pressure is less than the preset pressure.

[0032] The steam flow metering device provided by the embodiment of the utility model integrates the high-pressure condenser (the first pressure condenser 11) and the low-pressure condenser (the second pressure condenser 12), can effectively avoid the error caused by the installation of the steam flow metering device, cause the two condensers not to be on the same horizontal plane, reduce the measurement error of the differential pressure transmitter, and improve the measurement accuracy of the flow.

[0033] In an alternative embodiment, the composite pressure condensing part 1 further comprises an integrated plate 13, and the first pressure condenser 11 and the second pressure condenser 12 are integrated into one through the integrated plate 13.

[0034] The first gas inlet 111 arranged on the side of the first pressure condenser 11 can be connected with the orifice plate of the steam pipe 4, and the second gas inlet 121 arranged on the side of the second pressure condenser 12 can be connected with the orifice plate of the steam pipe 4. It should be noted that, through the two condensers (the first pressure condenser 11 and the second pressure condenser 12), the first pressure condenser 11 or the second pressure condenser 12 can be selected and used according to the steam pressure of the steam pipe 4, that is, when the first pressure condenser 11 is selected and used, the first gas inlet 111 of the first pressure condenser 11 is connected with the orifice plate of the steam pipe 4, and when the second pressure condenser 12 is selected and used, the second gas inlet 121 of the second pressure condenser 12 is connected with the orifice plate of the steam pipe 4.

[0035] In an alternative embodiment, the first pressure condenser 11 has a first perforated baffle 113 arranged in a stack manner, and the second pressure condenser 12 has a second perforated baffle 123 arranged in a stack manner.

[0036] By having the first perforated baffle 113 arranged in a stack in the first pressure condenser 11 and the second perforated baffle 123 arranged in a stack in the second pressure condenser 12, the problem of unstable liquid level and inaccurate measurement data caused by the vibration of the first pressure condenser 11 and / or the second pressure condenser 12 due to the vibration of the steam pipeline 4 can be avoided, that is, by arranging the first perforated baffle 113 and the second perforated baffle 123, the accuracy of the measurement data can be improved.

[0037] In some embodiments, the first pressure condenser has a plurality of first perforated baffles arranged in a stack and at intervals along the extension direction of the composite pressure condensing part. The plurality of first perforated baffles 113 are arranged between the first gas inlet and the first connecting port. The second pressure condenser has a plurality of second perforated baffles arranged in a stack and at intervals along the extension direction of the composite pressure condensing part. The plurality of first perforated baffles 113 are arranged between the second gas inlet and the second connecting port. The number of the plurality of first perforated baffles is the same as and corresponds to the number of the plurality of second perforated baffles. The height of the first perforated baffle and the corresponding second perforated baffle in the extension direction of the composite pressure condensing part is the same.

[0038] In this embodiment, the first pressure condenser has a plurality of first perforated baffles arranged in a stack and at intervals along the extension direction of the composite pressure condensing part. The plurality of first perforated baffles are arranged between the first gas inlet and the first connecting port, so that the condensing medium entering the first pressure condenser from the first gas inlet will pass through these baffles in turn, increasing the flow path of the condensing medium and making the flow of the condensing medium in the condenser more uniform and stable, avoiding the phenomenon of local overheating or supercooling, optimizing the heat exchange process, and performing sufficient heat exchange and condensation.

[0039] Similarly, the second pressure condenser also has a plurality of second perforated baffles arranged in a stack and at intervals along the extension direction of the composite pressure condensing part. The plurality of second perforated baffles are arranged between the second gas inlet and the second connecting port. The condensing medium entering the second pressure condenser from the second gas inlet will also pass through the plurality of second perforated baffles in turn for condensation.

[0040] In this embodiment, the number of the first perforated baffles is the same as and corresponds to the number of the plurality of second perforated baffles, and the height of the first perforated baffle in the extension direction of the composite pressure condensing part is the same as the height of the opposite first perforated baffle in the extension direction of the composite pressure condensing part, so that the flow state and condensation process of the condensing medium in the two condensers have similarity and comparability.

[0041] In some embodiments, the first perforated baffle 113 and the second perforated baffle 123 are both in the shape of a broken line and include a plurality of angles, and the angle of each angle is 70°-120°.

[0042] In the embodiment, the condensation efficiency is further improved by changing the number of folds and the angle of the folds of the baffle. The angle of the fold can be any value between 70° and 120°. The angle can be adjusted according to the size of the pressure condensing part, the condensation efficiency requirement, and the processing difficulty.

[0043] The more the number of folds of the first and second perforated baffles, the smaller the angle of each fold. The smaller angle of the fold increases the inclination of the holes on the baffle, thereby increasing the flow resistance of the condensing medium, increasing the flow path length of the condensing medium, and increasing the residence time of the condensing medium, thereby improving the condensation efficiency. Similarly, in the case of reducing the flow resistance of the condensing medium, the number of folds can be reduced and the angle of the fold can be increased.

[0044] In an alternative embodiment, the number of first perforated baffles 113 is greater than the number of second perforated baffles 123.

[0045] Similarly, the first pressure condenser 11 is a condenser for high-pressure fluid (e.g. high-pressure steam). Since the temperature of the steam is high, a large number of first perforated baffles 113 are provided to improve the condensation efficiency. The second pressure condenser 12 is a condenser for low-pressure fluid (e.g. liquid), so a small number of second perforated baffles 123 are provided to reduce the condensation cost.

[0046] In an alternative embodiment, the bottom of the first pressure condenser 11 is further provided with a first blowdown valve 114, and the bottom of the second pressure condenser 12 is further provided with a second blowdown valve 124.

[0047] The first and second pressure condensers 11 and 12 need to have the function of draining liquid to facilitate inspection and maintenance. Therefore, the first and second blowdown valves 114 and 124 are provided to facilitate inspection and maintenance.

[0048] In an alternative embodiment, the top of the first pressure condenser 11 is further provided with a first vent valve 115, and the top of the second pressure condenser 12 is further provided with a second vent valve 125.

[0049] The first and second pressure condensers 11 and 12 need to have the function of pressure relief to facilitate inspection and maintenance. Therefore, the first and second vent valves 115 and 125 are provided to facilitate inspection and maintenance.

[0050] In an alternative embodiment, it further comprises at least two sets of gate valves 2 located between the composite pressure condensing part 1 and the steam pipeline 4.

[0051] Two gate valves 2 are arranged between the composite pressure condenser 1 and the steam pipeline 4 to prevent high-pressure steam leakage.

[0052] In an alternative embodiment, a five-valve group is arranged on the differential pressure transmitter 3, and the composite pressure condenser 1 is connected with the five-valve group of the differential pressure transmitter 3.

[0053] The steam flow metering device provided by the embodiment of the utility model adds the protection device of the composite pressure condenser 1 before the conventional differential pressure transmitter, so that the measurement data of the differential pressure transmitter is restored to normal, and the measurement accuracy can be controlled within ±0.075%. The differential pressure transmitter has a good working state, and the measurement result is accurate.

[0054] The two condensers (the first pressure condenser 11 and the second pressure condenser 12) can effectively isolate the high-pressure steam and the steam flow metering device, the temperature of the high-pressure steam entering the condenser is effectively reduced, the medium temperature contacted by the differential pressure transmitter is only normal temperature, and the gasket thermal deformation and the diaphragm damage at the connection of the differential pressure transmitter are avoided.

[0055] The two gate valves 2 arranged in front of the two condensers (the first pressure condenser 11 and the second pressure condenser 12) can effectively control the flow of steam, and facilitate the subsequent inspection of the two condensers and the differential pressure transmitter.

[0056] The steam flow metering device provided by the embodiment of the utility model has good economic benefits, the differential pressure transmitter of the related technology has a large measurement error and needs to be frequently maintained, the single maintenance time is at least 1h, the measurement error is large again about a week after single maintenance, steam measurement is inaccurate, and after multiple maintenance, the differential pressure transmitter will be irreversibly damaged, and only a new instrument can be completely replaced, the differential pressure transmitter of the steam flow metering device on the market is sold at about 8000 yuan, the replacement period is about three months, the steam quantity consumed due to the inability to accurately grasp the steam quantity and the frequent adjustment of the flow regulating valve cannot be estimated, and the artificial time is also consumed, and the burden on employees is increased. The steam flow metering device provided by the embodiment of the utility model does not need to frequently adjust the flow regulating valve, saves the steam flow, and reduces the use cost of the differential pressure transmitter.

[0057] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A steam flow metering device, characterized in that, include: The composite pressure condenser has a first pressure connection end and a second pressure connection end, wherein the first pressure connection end includes a first gas inlet and a first connection port, the second pressure connection end includes a second gas inlet and a second connection port, and the first pressure is greater than the second pressure. The differential pressure transmitter is connected to the first connection port of the first pressure connection end or the second connection port of the second pressure connection end of the composite pressure condenser.

2. The steam flow metering device according to claim 1, characterized in that, The composite pressure condensation section includes a first pressure condenser and a second pressure condenser; The first pressure condenser and the second pressure condenser are arranged side by side; The first gas inlet and the first connection port are located on the side of the first pressure condenser, and the second gas inlet and the second connection port are located on the side of the second pressure condenser. The first pressure condenser is used to connect to the steam pipeline through the first connection port when the steam pressure is greater than the preset pressure, and the second pressure condenser is used to connect to the steam pipeline through the second connection port when the steam pressure is less than the preset pressure.

3. The steam flow metering device according to claim 2, characterized in that, The composite pressure condenser also includes an integrated plate, through which the first pressure condenser and the second pressure condenser are integrated into one unit.

4. The steam flow metering device according to claim 2 or 3, characterized in that, The first pressure condenser has a plurality of first perforated baffles stacked and spaced apart along the extension direction of the composite pressure condenser, and the plurality of first perforated baffles are disposed between the first gas inlet and the first connection port; The second pressure condenser has a plurality of second perforated baffles stacked and spaced apart along the extension direction of the composite pressure condenser, and the plurality of second perforated baffles are disposed between the second gas inlet and the second connection port; The number of the first perforated baffles is the same as the number of the second perforated baffles, and they are arranged in a one-to-one correspondence. The first perforated baffles and the corresponding second perforated baffles are at the same height in the extension direction of the composite pressure condensation section.

5. The steam flow metering device according to claim 4, characterized in that, Both the first perforated baffle and the second perforated baffle are zigzag-shaped and include multiple bends, each bend having an angle of 70°-120°.

6. The steam flow metering device according to claim 4, characterized in that, The number of the first perforated baffles is greater than the number of the second perforated baffles.

7. The steam flow metering device according to claim 2, characterized in that, The bottom of the first pressure condenser is also provided with a first drain valve, and the bottom of the second pressure condenser is also provided with a second drain valve.

8. The steam flow metering device according to claim 2, characterized in that, The first pressure condenser is also provided with a first vent valve at its top, and the second pressure condenser is also provided with a second vent valve at its top.

9. The steam flow metering device according to claim 1, characterized in that, Also includes: At least two sets of gate valves are located between the composite pressure condenser and the steam pipe.

10. The steam flow metering device according to claim 1, characterized in that, The differential pressure transmitter is equipped with a five-valve group, and the composite pressure condenser is connected to the five-valve group of the differential pressure transmitter.

Images