CN111521225A - Orifice gas flow measuring device and measuring method thereof - Google Patents
Orifice gas flow measuring device and measuring method thereof Download PDFInfo
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- CN111521225A CN111521225A CN202010199044.7A CN202010199044A CN111521225A CN 111521225 A CN111521225 A CN 111521225A CN 202010199044 A CN202010199044 A CN 202010199044A CN 111521225 A CN111521225 A CN 111521225A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
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Abstract
The invention discloses a pore gas flow measuring device and a measuring method thereof. The orifice gas flow measuring device and the measuring method thereof can effectively remove the condensate in the orifice gas and effectively control the flow rate of the orifice gas, thereby effectively measuring the orifice gas flow; the condensate is collected in the orifice and can be used as a refrigerant for adjusting the temperature of the gas discharged from the drill hole after simple treatment. Meanwhile, the automatic control and operation are easy to carry out.
Description
Technical Field
The invention relates to the technical field of coal and coalbed methane mining, in particular to a pore gas flow measuring device and a measuring method thereof.
Background
The underground coal gasification technology can directly convert underground coal into coal gas or synthetic gas through thermal action and chemical reaction, and the coal gas or the synthetic gas is discharged from an outlet drill hole of an underground gasification furnace. The coal gas discharged from underground gasification gas outlet drilling holes is complex in composition (also called as crude gas, crude gas or wet gas), contains main gas components of hydrogen, carbon monoxide, methane, carbon dioxide and nitrogen, and generally contains a large amount of water vapor, tar, solid particles (ash, coal slag, rock particles and the like), liquid drops (coal gas with water and oil drops) and the like and a small amount or trace amount of impurities such as hydrogen sulfide, hydrogen chloride, hydrogen cyanide, ammonia, phenol and the like according to different gasification coal types. During the transportation process of the high-temperature raw gas discharged from the gas outlet drill hole in the ground pipeline, due to cooling, depressurization and deceleration, water vapor, tar, solid particles, liquid drops and the like contained in the raw gas are easy to settle and condense to form condensate, and the condensate and the gas components in the raw gas are transported together in a gas-liquid two-phase flow. In the process of conveying the crude gas, on one hand, the condensate can be deposited on the inner walls of the pipelines and the gas metering device and even block the metering device, so that the metering of the crude gas is seriously influenced, the gas metering is inaccurate or incompact and even cannot be directly metered, the automatic control of outlet flow or pressure cannot be performed, and the automatic control of the underground coal gasification process is restricted to a certain extent. Because of the influence of impurities in the raw gas on the flow measurement, traditionally, the gas flow of each gas outlet drill hole is not directly measured, but the raw gas collected by each gas outlet drill hole is sent into a gas main pipeline, then the gas in the gas main pipeline is subjected to centralized purification treatment to remove impurities such as water vapor, tar, solid particles (ash, coal slag, rock particles and the like), liquid drops (water and oil drops entrained by the gas) and the like in the raw gas, and then the total flow of the purified gas is measured, but the flow of each gas outlet drill hole cannot be obtained by the method, so that the gas flow is generally adjusted by experience in the actual operation process. On the other hand, because a large amount of condensate accumulates in the pipeline, corrosive media (such as hydrogen sulfide, hydrogen chloride, hydrogen cyanide, ammonia, phenol and the like) often exist in the condensate to corrode the pipeline, so that the long-term safe operation of the pipeline is influenced; in addition, a sewage discharge pipeline needs to be additionally arranged on the gas main pipeline, condensate is discharged periodically, and a large amount of pollutants contained in the condensate are potential pollution sources and influence civilized production.
In order to solve the problem, the existing patents such as CN201010509596 and CN201210106615 propose an integrated metering device for directly measuring the gas flow at an orifice, a flow dividing device is arranged in the metering device, and when crude gas flows through the flow dividing device, condensate in the crude gas can be deposited and discharged to the bottom of a pipeline; the dry gas will gather to the upper part of the pipeline, and the metering is carried out after further purification, thereby measuring the gas flow of the orifice. Found in the on-the-spot in-service use, the diverging device efficiency in the metering device is too low, and the orifice coal gas velocity of flow is very fast simultaneously, leads to effectively getting rid of the condensate to it measures the purpose to be difficult to realize the reposition of redundant personnel.
Disclosure of Invention
The invention aims to solve the problems, and provides a device and a method for measuring the flow of coal gas at a drilled hole of underground coal gasification gas outlet, which can effectively remove condensate in the coal gas at the drilled hole and effectively control the flow rate of the coal gas at the drilled hole, thereby effectively measuring the flow of the coal gas at the drilled hole; the condensate is collected in the orifice and can be used as a refrigerant for adjusting the temperature of the gas discharged from the drill hole after simple treatment. Meanwhile, the automatic control and operation are easy to carry out.
In order to achieve the above purpose, the invention provides the following technical scheme:
a kind of orifice coal gas flow measuring device, it includes gas-liquid-solid three-phase separation facility, coal gas metering device, pressure regulating device connected sequentially;
the gas-liquid-solid three-phase separation device comprises a three-phase separator and a liquid-liquid separation tank which are connected with each other, and the three-phase separator is respectively connected with the gas outlet drill hole and the coal gas metering device;
the gas metering device comprises a flowmeter, a pressure sensor and a temperature sensor which are arranged on a gas pipeline;
the pressure regulating device comprises a gas regulating bypass valve on a gas pipeline, and an upstream block valve, a gas regulating valve and a downstream block valve which are connected with the gas regulating bypass valve in parallel through the gas pipeline, wherein the upstream block valve, the gas regulating valve and the downstream block valve are connected in series on the gas pipeline;
the three-phase separator, the flowmeter, the pressure sensor, the temperature sensor, the coal gas regulating bypass valve, the upstream block valve, the coal gas regulating valve and the downstream block valve are connected through a coal gas pipeline.
Preferably, the three-phase separator comprises a raw gas inlet, a dry gas outlet and a condensate outlet; wherein, the raw gas inlet is connected with the gas outlet drill hole, and the dry gas outlet enters the gas metering device.
Preferably, the liquid-liquid separation tank comprises a condensate inlet, a first liquid phase outlet; and a condensate outlet of the three-phase separator is connected with a condensate inlet of the liquid-liquid separation tank, and a first liquid phase outlet of the liquid-liquid separation tank is connected with a first condensate pump.
Preferably, a first condensate flow meter is provided at the outlet of the first condensate pump
Preferably, the liquid-liquid separation tank is provided with a second liquid phase outlet, and the second liquid phase outlet is connected with a delivery pump and a flow meter.
Preferably, a liquid level meter is arranged on the liquid-liquid separation tank, and a liquid level control valve is arranged on the first liquid phase outlet.
Preferably, the liquid-liquid separation tank is connected with the air outlet drill hole through a condensed water conveying pipeline, and a flow control valve is arranged on the condensed water conveying pipeline.
Preferably, a bypass pipeline, a raw gas bypass upstream block valve and a raw gas bypass downstream stop valve are arranged between a raw gas inlet and a dry gas outlet of the three separators; and a sampling port is arranged on the bypass pipeline.
Preferably, a flowmeter upstream block valve, a flowmeter downstream block valve and a flowmeter bypass valve are respectively arranged between the gas metering device and the three-phase separation device and between the gas metering device and the pressure regulating device.
The orifice gas flow measuring device comprises the following measuring methods:
a) raw gas separation: raw gas discharged from the gas outlet drill hole is sent into a gas-liquid-solid three-phase separation device, so that water vapor, tar, solid particles, liquid drops and the like contained in the raw gas in the three-phase separator are settled and condensed into condensate under the action of gravity, centrifugal force and the like to be separated from a gas phase, the condensate is discharged to a liquid-liquid separation tank, and dry gas without the condensate enters a gas metering device;
b) gas and condensate metering: metering the condensate in the liquid-liquid separation tank and then sending the condensate to a sewage pipeline; the dry gas obtains a flow value under the working condition through a gas flowmeter, obtains temperature and pressure values under the working condition through a temperature sensor and a pressure sensor, and obtains the instantaneous flow and the accumulated flow of the dry gas under the standard condition through conversion through a flow integrating instrument;
c) and (3) system pressure regulation: after being metered, the dry gas enters a pressure regulating device, and simultaneously, the pressure in the gasification furnace is controlled, and the pressure of the gas metering device is stabilized.
The orifice gas flow measuring device and the measuring method thereof can effectively remove the condensate in the orifice gas and effectively control the flow rate of the orifice gas, thereby effectively measuring the orifice gas flow; the condensate is collected in the orifice and can be used as a refrigerant for adjusting the temperature of the gas discharged from the drill hole after simple treatment. Meanwhile, the automatic control and operation are easy to carry out.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a structural diagram of a gas flow measuring device according to an embodiment of the present invention;
fig. 2 is a structural diagram of an orifice gas flow measuring device according to a second embodiment of the present invention.
Description of reference numerals:
1. drilling a gas outlet hole; 2. a gas-liquid-solid three-phase separation device; 3. a gas metering device; 4. a pressure regulating device;
20. a sampling port; 20a, a crude gas bypass upstream block valve; 20b, a raw gas bypass downstream stop valve; 21. a three-phase separator; 21a, a raw gas inlet; 21b, a dry gas outlet; 21c, a condensate outlet; 22. a condensate separator tank; 22a, a condensate inlet; 22b, a first liquid phase outlet (or aqueous phase outlet); 22c, a second liquid phase outlet (or oil phase outlet); 23. a first condensate pump (or water pump); 24. a first condensate flow meter (or water flow meter); 25. a second condensate pump (or oil pump); 25 a second condensate flow meter (or oil flow meter); 27. a liquid level control valve; 28. a flow control valve;
30. a flow meter bypass valve; 30a, a flow meter upstream block valve; 30b, a shut-off valve downstream of the flow meter; 31. a gas flow meter; 32. a pressure sensor; 33. a temperature sensor;
40. a gas regulating bypass valve; 40a, an upstream block valve; 40b, a downstream block valve; 41. a gas regulating valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
A kind of orifice coal gas flow measuring device, it includes the gas-liquid-solid three-phase separator 2, coal gas metering device 3, pressure regulating device 4 connected sequentially;
the gas-liquid-solid three-phase separation device 2 comprises a three-phase separator 21 and a liquid-liquid separation tank 22 which are connected with each other, and the three-phase separator 21 is respectively connected with the gas outlet drill hole 1 and the coal gas metering device 3;
the gas metering device 3 comprises a flow meter 31, a pressure sensor 32 and a temperature sensor 33 which are arranged on a gas pipeline;
the pressure regulating device 4 comprises a gas regulating bypass valve 40 on a gas pipeline, and an upstream block valve 40a, a gas regulating valve 41 and a downstream block valve 40b which are connected with the gas regulating bypass valve 40 in parallel through the gas pipeline, wherein the upstream block valve 40a, the gas regulating valve 41 and the downstream block valve 40b are connected in series on the gas pipeline;
the three-phase separator 21, the flow meter 31, the pressure sensor 32, the temperature sensor 33, the gas regulating bypass valve 40, the upstream block valve 40a, the gas regulating valve 41 and the downstream block valve 40b are connected through gas pipelines.
Example one
As shown in fig. 1, the orifice gas flow measuring device is installed near the orifice of an outlet drill 1, and comprises: a gas-liquid-solid three-phase separation device 2, a gas metering device 3 and a pressure regulating device 4. The coal gas from the gas outlet drill hole 1 sequentially enters a gas-liquid-solid three-phase separation device 2, a coal gas metering device 3 and a pressure regulating device 4 which are connected in sequence. Wherein the content of the first and second substances,
the three-phase separation device 2 is used for removing impurity components which are easy to settle and condense, such as water vapor, tar, solid particles, liquid drops and the like contained in the raw gas from a gas phase, reducing the influence of the impurity components on gas metering, and collecting generated condensate so as to be convenient for centralized treatment. As shown in FIG. 1, the three-phase separator mainly comprises a three-phase separator 21 and a liquid-liquid separation tank 22, wherein the three-phase separator can be any known gas-liquid-solid three-phase separator such as wire mesh type, filter material packing type, baffle type, dynamic blade type, cyclone type, etc., preferably, a dynamic separation device with high anti-blockage and operation elasticity is adopted. As shown in fig. 1, the three-phase separator 21 comprises a raw gas inlet 21a, a dry gas outlet 21b and a liquid phase outlet 21c, wherein the raw gas inlet 21a is connected to the outlet bore 1 and the dry gas outlet 21b enters the gas metering device 3.
The liquid-liquid separation tank 22 is used for collecting condensate separated by the three-phase separator 21, and as shown in fig. 1, includes a condensate inlet 22a and a first liquid-phase outlet 22b, a condensate outlet 21c of the separator 21 is connected to the separator condensate inlet 22a, the first liquid-phase outlet 22b of the separator is connected to a first condensate pump 23, and the first condensate pump 23 is used for delivering condensate in the liquid-liquid separation tank 22 to a sewage pipeline. Further, a first condensate flow meter 24 is disposed at the outlet of the first condensate pump 23, so that the amount of condensate can be measured, and preferably, the first condensate flow meter 24 is a turbine flow meter.
Further, the three-phase separator 21 may also comprise a second liquid phase outlet, wherein the first liquid phase outlet is used for discharging the water phase (containing solid particles) and the second liquid phase outlet is used for discharging the oil phase (tar).
Further, a bypass line, a raw gas bypass upstream block valve 20a, and a raw gas bypass downstream block valve 20b are provided between the raw gas inlet 21a and the dry gas outlet 21b of the three separators 21. When the separator is blocked or daily maintenance is carried out, the bypass pipeline can be opened to ensure the continuous air outlet of the air outlet drill hole; furthermore, a sampling port 20 is arranged on the by-pass pipeline, so that tar, solid particles and the like can be sampled and analyzed.
As shown in fig. 1, the gas metering device 3 includes a flow meter 31, a pressure sensor 32, and a temperature sensor 33. The flow meter 31 may be any type of flow meter capable of measuring the flow rate of gas, such as a differential pressure flow meter, a vortex shedding flow meter, and a mass flow meter. The pressure sensor 32 and the temperature sensor 33 are respectively used for measuring a pressure signal and a temperature signal of the dry gas, and are sent to the flow integrator together with a flow signal measured by the flowmeter, and the instantaneous flow and the accumulated flow of the dry gas under the standard condition are obtained through conversion.
Further, a flowmeter 31, a pressure sensor 32, and a temperature sensor 33 are mounted on the gas pipe. The pressure and temperature sensors 32 and 33 are located on both sides of the flow meter, respectively, or may be located on the same side. A flowmeter upstream cut-off valve 30a, a flowmeter downstream cut-off valve 30b and a bypass cut-off valve 30 are respectively arranged between the gas metering device 3 and the three-phase separation device 2 as well as between the gas metering device 3 and the pressure regulating device 4, so that the continuous gas outlet of the gas outlet drill hole can be maintained conveniently in daily maintenance and failure of the metering device.
As shown in fig. 1, the pressure regulating device 4 mainly functions: firstly, the flow rate of gas discharged from the drilled hole is controlled, and excessive solid particles, liquid water and the like are prevented from being carried at an excessive speed; secondly, controlling the pressure in the gasification furnace to inhibit the inflow of excessive underground water; and thirdly, stabilizing the pressure on the flow metering side. The pressure regulating device comprises a coal gas regulating bypass valve 40 and a coal gas regulating valve 41, preferably, the coal gas regulating valve 41 is a back pressure valve, and the back pressure value depends on the coal bed hydrostatic pressure, the system operating pressure and the like. An upstream cut-off valve 40a, a downstream cut-off valve 40b and a bypass cut-off valve 40 are respectively arranged between the pressure regulating device 4 and the gas metering device 3 as well as between the pressure regulating device and the gas pipeline, so that the continuous gas outlet of the gas outlet drilling hole can be maintained when the metering device is in daily maintenance and fails. Preferably, the back pressure valve 41 is an automatic back pressure valve, and the opening degree can be automatically adjusted to maintain the set back pressure value of the system.
The method for measuring the flow of the coal underground gasification gas outlet drill hole orifice comprises the following steps:
a) raw gas separation: raw gas discharged from the gas outlet drill hole 1 is sent to a gas-liquid-solid three-phase separation device 2, water vapor, tar, solid particles, liquid drops and the like contained in the raw gas in a three-phase separator 21 are settled and condensed into condensate under the action of gravity, centrifugal force and the like to be separated from a gas phase, the condensate is accumulated at the bottom of the three-phase separator and discharged to a separation tank 22 through a condensate outlet 21c, and dry gas with the condensate removed enters a gas metering device from a dry gas outlet 21 b.
b) Gas and condensate metering: the condensate in the separation tank 22 is metered and then sent to a sewage pipeline by a first condensate pump 23; the dry gas obtains a flow value under the working condition through a gas flowmeter, obtains temperature and pressure values under the working condition through a temperature sensor 33 and a pressure sensor 32, and obtains the instantaneous flow and the accumulated flow of the dry gas under the standard condition through conversion through a flow integrator. Further, the average flow rate of the raw coke oven gas can be obtained by converting the flow rate of the condensate.
c) And (3) system pressure regulation: after being metered, the dry coal gas enters a pressure regulating device 4, the flow rate of the coal gas is controlled by utilizing a back pressure valve 41, the pressure in the gasification furnace is controlled simultaneously, the pressure of the coal gas metering device is stabilized, and the stability of the measuring process is ensured.
Example two:
the second embodiment is an improvement on the structure of the first embodiment, as shown in fig. 2, further, the liquid-liquid separation tank 22 includes a second liquid phase outlet 22c, wherein the first liquid phase outlet 21b is used for discharging the aqueous phase (containing solid particles), the second liquid phase outlet 22c is used for discharging the oil phase (tar), and the second liquid phase outlet 22c is connected to a transfer pump 25 and a flow meter 26, and is fed into the tar tank after being measured. Furthermore, a liquid level meter is arranged on the liquid-liquid separation tank 22, a liquid level control valve 27 is arranged at a liquid phase outlet, and an output signal of the liquid level meter is connected with an input signal of the liquid level control valve 27 and is used for automatically controlling the discharge of the liquid phase.
As shown in fig. 2, further, the liquid-liquid separation tank 22 is connected to the gas outlet borehole 1 through a condensed water conveying pipeline, and a part of condensed water in the liquid-liquid separation tank 22 can be conveyed to the gas outlet borehole 1 for cooling outlet gas. Furthermore, a flow control valve 28 is disposed on the condensed water delivery pipeline, and an output signal of the flow meter is connected with a signal input end of the flow control valve for automatically controlling the flow rate of the condensed water.
The method for measuring the flow of the coal underground gasification gas outlet drill hole orifice comprises the following steps:
a) raw gas separation: raw gas discharged from the gas outlet drill hole 1 is sent to a gas-liquid-solid three-phase separation device 2, water vapor, tar, solid particles, liquid drops and the like contained in the raw gas in a three-phase separator 21 are settled and condensed into condensate under the action of gravity, centrifugal force and the like to be separated from a gas phase, the condensate is accumulated at the bottom of the three-phase separator and discharged to a separation tank 22 through a condensate outlet 21c, and dry gas with the condensate removed enters a gas metering device from a dry gas outlet 21 b;
b) gas and condensate metering: the condensate in the separation tank 22 is divided into a water phase and an oil phase, and the water phase and the oil phase are respectively pumped to a sewage pipeline, a tar tank and the like after being respectively measured; furthermore, part of the condensate can be simply treated and then pumped to the air outlet drill hole to cool the high-temperature coal gas. The dry gas obtains a flow value under the working condition through a gas flowmeter, obtains temperature and pressure values under the working condition through a temperature sensor 33 and a pressure sensor 32, and obtains the instantaneous flow and the accumulated flow of the dry gas under the standard condition through conversion through a flow integrator. Further, the average flow rate of the raw coke oven gas can be obtained by converting the flow rate of the condensate.
c) And (3) system pressure regulation: after being metered, the dry coal gas enters a pressure regulating device 4, the flow rate of the coal gas is controlled by utilizing a back pressure valve 41, the pressure in the gasification furnace is controlled simultaneously, the pressure of the coal gas metering device is stabilized, and the stability of the measuring process is ensured.
The orifice gas flow measuring device and the measuring method thereof can effectively remove condensate in the orifice gas and effectively control the flow rate of the orifice gas, thereby effectively measuring the orifice gas flow; the condensate is collected in the orifice and can be used as a refrigerant for adjusting the temperature of the gas discharged from the drill hole after simple treatment. Meanwhile, the automatic control and operation are easy to carry out.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The orifice gas flow measuring device is characterized by comprising a gas-liquid-solid three-phase separating device, a gas metering device and a pressure regulating device which are sequentially connected;
the gas-liquid-solid three-phase separation device comprises a three-phase separator and a liquid-liquid separation tank which are connected with each other, and the three-phase separator is respectively connected with the gas outlet drill hole and the coal gas metering device;
the gas metering device comprises a flowmeter, a pressure sensor and a temperature sensor which are arranged on a gas pipeline;
the pressure regulating device comprises a gas regulating bypass valve on a gas pipeline, and an upstream block valve, a gas regulating valve and a downstream block valve which are connected with the gas regulating bypass valve in parallel through the gas pipeline, wherein the upstream block valve, the gas regulating valve and the downstream block valve are connected in series on the gas pipeline;
the three-phase separator, the flowmeter, the pressure sensor, the temperature sensor, the coal gas regulating bypass valve, the upstream block valve, the coal gas regulating valve and the downstream block valve are connected through a coal gas pipeline.
2. The orifice gas flow measurement device of claim 1, wherein the three-phase separator comprises a raw gas inlet, a dry gas outlet, and a condensate outlet; wherein, the raw gas inlet is connected with the gas outlet drill hole, and the dry gas outlet enters the gas metering device.
3. The orifice gas flow measurement device of claim 2, wherein the liquid-liquid separation tank comprises a condensate inlet, a first liquid phase outlet; and a condensate outlet of the three-phase separator is connected with a condensate inlet of the liquid-liquid separation tank, and a first liquid phase outlet of the liquid-liquid separation tank is connected with a first condensate pump.
4. The orifice gas flow measurement device of claim 3, wherein a first condensate flow meter is disposed at an outlet of the first condensate pump.
5. The orifice gas flow measuring device of claim 3, wherein the liquid-liquid separation tank is provided with a second liquid phase outlet, and the second liquid phase outlet is connected with a delivery pump and a flow meter.
6. The orifice gas flow measurement device of claim 3, wherein a liquid level gauge is disposed on the liquid-liquid separation tank, and a liquid level control valve is disposed on the first liquid phase outlet.
7. The orifice gas flow measurement device of claim 3, wherein the liquid-liquid separation tank is connected to the gas outlet bore via a condensate delivery conduit, and a flow control valve is disposed on the condensate delivery conduit.
8. The orifice gas flow measuring device of claim 2, wherein a bypass line, a raw gas bypass upstream block valve, and a raw gas bypass downstream block valve are disposed between the raw gas inlet and the dry gas outlet of the three separators; and a sampling port is arranged on the bypass pipeline.
9. The orifice gas flow measuring device of claim 1, wherein a flowmeter upstream block valve, a flowmeter downstream block valve and a flowmeter bypass valve are respectively disposed between the gas metering device and the three-phase separation device and the pressure regulating device.
10. The orifice gas flow measuring device of any one of claims 1 to 9, measured as follows:
a) raw gas separation: raw gas discharged from the gas outlet drill hole is sent into a gas-liquid-solid three-phase separation device, so that water vapor, tar, solid particles, liquid drops and the like contained in the raw gas in the three-phase separator are settled and condensed into condensate under the action of gravity, centrifugal force and the like to be separated from a gas phase, the condensate is discharged to a liquid-liquid separation tank, and dry gas without the condensate enters a gas metering device;
b) gas and condensate metering: metering the condensate in the liquid-liquid separation tank and then sending the condensate to a sewage pipeline; the dry gas obtains a flow value under the working condition through a gas flowmeter, obtains temperature and pressure values under the working condition through a temperature sensor and a pressure sensor, and obtains the instantaneous flow and the accumulated flow of the dry gas under the standard condition through conversion through a flow integrating instrument;
c) and (3) system pressure regulation: after being metered, the dry gas enters a pressure regulating device, and simultaneously, the pressure in the gasification furnace is controlled, and the pressure of the gas metering device is stabilized.
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| CN202010199044.7A CN111521225A (en) | 2020-03-20 | 2020-03-20 | Orifice gas flow measuring device and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010199044.7A CN111521225A (en) | 2020-03-20 | 2020-03-20 | Orifice gas flow measuring device and measuring method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1459055A1 (en) * | 2001-12-24 | 2004-09-22 | Promecon Prozess- Und Messtechnik Conrads GmbH | Microwave measuring device for detecting the charge of a two-phase flow |
| CN102032930A (en) * | 2010-10-15 | 2011-04-27 | 西安交通大学 | Shunting type coal gas flow measurement device and measurement method thereof |
| CN108168642A (en) * | 2018-01-31 | 2018-06-15 | 锦州中科制管有限公司 | A kind of aperture measurement of gas flow device and its measuring method |
-
2020
- 2020-03-20 CN CN202010199044.7A patent/CN111521225A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1459055A1 (en) * | 2001-12-24 | 2004-09-22 | Promecon Prozess- Und Messtechnik Conrads GmbH | Microwave measuring device for detecting the charge of a two-phase flow |
| CN102032930A (en) * | 2010-10-15 | 2011-04-27 | 西安交通大学 | Shunting type coal gas flow measurement device and measurement method thereof |
| CN108168642A (en) * | 2018-01-31 | 2018-06-15 | 锦州中科制管有限公司 | A kind of aperture measurement of gas flow device and its measuring method |
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Application publication date: 20200811 |