CN112226257A - Factory debugging test method for offshore platform triethylene glycol natural gas dehydration and regeneration system - Google Patents
Factory debugging test method for offshore platform triethylene glycol natural gas dehydration and regeneration system Download PDFInfo
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- CN112226257A CN112226257A CN202010917263.4A CN202010917263A CN112226257A CN 112226257 A CN112226257 A CN 112226257A CN 202010917263 A CN202010917263 A CN 202010917263A CN 112226257 A CN112226257 A CN 112226257A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Abstract
The invention discloses a factory debugging test method for a triethylene glycol natural gas dehydration and regeneration system of an offshore platform, which comprises the following steps: preparation work: preparing various test tables, logic diagrams and the like according to various components and working principles in the system; and (3) appearance inspection: carrying out appearance inspection on process equipment, instruments and meters, pipeline connection and the like in the system; functional checking: carrying out mechanical performance test, functional test and electrical loop test on the system; and (3) purging the system: purging the system subjected to the functionality inspection for multiple times, injecting triethylene glycol into the system, and performing the nitrogen sealing process of the whole system; forming a test table and a list of legacy items. The invention provides a complete set of factory debugging test method through appearance inspection, integrity inspection, operability inspection and functional debugging test of core equipment, and the test can be carried out on land, thereby reducing the workload of the platform to the maximum extent and ensuring that the system is started and put into production smoothly.
Description
Technical Field
The invention relates to the technical field of offshore oil engineering, in particular to a factory debugging and testing method for a triethylene glycol natural gas dehydration and regeneration system of an offshore platform.
Background
The triethylene glycol natural gas dehydration and regeneration system can effectively eliminate the hidden quality trouble in the construction process through debugging and testing before leaving the factory, and provides quality guarantee for stable operation after leaving the factory. In the factory debugging test of the land conventional triethylene glycol natural gas dehydration and regeneration system, integrity check is mainly used, and the function test and system debugging work of the system are completed on site.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. In view of the above, the present invention needs to provide a complete set of factory debugging test method through appearance inspection, integrity inspection, operability inspection and functional debugging test of core equipment, and the method can be performed on the land, so as to reduce the workload of the platform to the maximum extent and ensure that the system is started and put into operation smoothly.
The invention provides a factory debugging test method for a triethylene glycol natural gas dehydration and regeneration system of an offshore platform, which comprises the following steps:
s1, preparation: preparing various test tables, logic diagrams and the like according to various components and working principles in the triethylene glycol natural gas dehydration and regeneration system;
s2, appearance inspection: performing appearance inspection on process equipment, instruments, pipeline connections and the like in the triethylene glycol natural gas dehydration and regeneration system in S1;
s3, functional check: performing functional check on the triethylene glycol natural gas dehydration and regeneration system in the S2, wherein the functional check comprises a mechanical performance test, a functional test and an electrical loop test;
s4, system purging: purging the triethylene glycol natural gas dehydration and regeneration system subjected to functionality inspection for multiple times, injecting the triethylene glycol natural gas dehydration and regeneration system into a triethylene glycol dehydration process, and then performing a whole system nitrogen sealing process;
and S5, forming a test table and a legacy item list.
In step S1, the test tables and logic diagrams include system PID diagrams, component subsystem PID diagrams, thermal balance calculation files, cause and effect diagrams, instrument lists, control logic diagrams, inspection and test plans, terminal wiring diagrams, system operation manuals, circulation pump test reports, electric heater test reports, and the like.
According to one embodiment of the present invention, the appearance of the equipment, instruments, pipelines, etc. is checked according to the system PID map in step S2, and the appearance check problems and states are marked by different colors in the overall layout map.
According to one embodiment of the present invention, the mechanical performance test in step S3 includes pipeline and internals inspection, in-system filter inspection, circulation pump inspection, ladder and railing inspection, etc.
According to an embodiment of the present invention, the functional test in step S3 includes: leakage test, instrument continuity loop test, insulation test, control valve test, and the like.
According to an embodiment of the present invention, the electrical loop test in step S3 includes: control and alarm test, shut-off and emergency stop test, etc.
According to one embodiment of the invention, the leakage test is a pipeline leakage test, wherein all pipelines are subjected to the leakage test by using 0.5-1 Bar dry gas and using soap bubbles, the effective pressure maintaining time of the whole system is longer than 10min, and the finally tested leakage point is identified in the PID of the system.
According to one embodiment of the invention, in the control valve test, whether instrument gas can smoothly enter a control valve cylinder is checked, signals of 8mA, 12mA, 16mA, 20mA and the like are respectively output according to the set correct output of a valve air conditioner given on a control valve data table, a connecting terminal connected to the control valve by using a signal generator is used, whether the opening degree of the control valve is 25%, 50%, 75% and 100% is checked, the test is repeated twice in a positive sequence and a reverse sequence, and the output result of the control valve is recorded.
According to one embodiment of the invention, in the appearance inspection result of the system PID map, the green mark is no problem for inspection, the red mark is problem after inspection, the blue mark is problem for inspection and needs further verification, and the yellow mark omits the content during installation or manufacture.
According to one embodiment of the invention, the triethylene glycol natural gas dehydration and regeneration system is purged with nitrogen at a purge pressure greater than 3Bar in step S4, wherein the number of purges is at least three.
The ex-factory debugging test method for the offshore platform triethylene glycol natural gas dehydration and regeneration system can finish appearance inspection, integrity inspection and operability inspection of the offshore platform triethylene glycol natural gas dehydration and regeneration system and functional debugging test of core equipment on land through the test method and the test steps, all debugging test results of all parts are recorded in a special test table and are signed and confirmed by a supplier, an owner and an independent third-party inspection mechanism in a combined manner, the workload of the platform is reduced to the maximum extent, and the system is guaranteed to be started and put into production smoothly.
Drawings
Fig. 1 is a flow chart illustrating steps of a factory commissioning test method of an offshore platform triethylene glycol natural gas dehydration and regeneration system according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, a factory debugging test method for a triethylene glycol natural gas dehydration and regeneration system of an offshore platform comprises the following steps:
s100, preparation: preparing various test tables, logic diagrams and the like according to various components and working principles in a triethylene glycol natural gas dehydration and regeneration system, wherein the triethylene glycol natural gas dehydration and regeneration system comprises a natural gas inlet filtering separation sledge, a triethylene glycol dehydration sledge, a triethylene glycol regeneration sledge and the like, and all tests are carried out on a land platform construction site;
s200, appearance inspection: performing appearance inspection on process equipment, instruments and meters, pipeline connection and the like in the triethylene glycol natural gas dehydration and regeneration system in the S100;
s300, functional checking: performing functional check on the triethylene glycol natural gas dehydration and regeneration system in the S200, and testing the internal connection of a junction box or a local control panel by using an analog signal to ensure the integrity of the whole loop of the instrument, wherein the corresponding calibration certificate needs to be checked before various instruments are installed, and the functional check comprises mechanical performance test, functional test and electrical loop test;
s400, system purging: purging the triethylene glycol natural gas dehydration and regeneration system subjected to functionality inspection for multiple times, injecting the triethylene glycol natural gas dehydration and regeneration system into a triethylene glycol dehydration process, and then performing a whole system nitrogen sealing process;
and S500, forming a test table and a legacy item list.
The ex-factory debugging test method for the offshore platform triethylene glycol natural gas dehydration and regeneration system can finish appearance inspection, integrity inspection and operability inspection of the offshore platform triethylene glycol natural gas dehydration and regeneration system and functional debugging test of core equipment on land through the test method and the test steps, all debugging test results of all parts are recorded in a special test table and are signed and confirmed by a supplier, an owner and an independent third-party inspection mechanism in a combined manner, the workload of the platform is reduced to the maximum extent, and the system is guaranteed to be started and put into production smoothly.
As shown in fig. 1, in step S100, each test table and logic diagram includes a system PID diagram, a component subsystem PID diagram, a thermal balance calculation file, a cause and effect diagram, a meter list, a control logic diagram, an inspection and test plan, a terminal wiring diagram, a system operation manual, a circulation pump test report, an electric heater test report, and the like.
As shown in fig. 1, in step S200, the appearance of the equipment, the instruments, the pipelines, etc. is checked according to the system PID diagram, and the appearance checking problems and states are marked by different colors in the overall layout diagram, it should be understood that, in the appearance checking, the operation condition of the manual valve (on/off) in the system is checked according to the system PID diagram, and the problems and states are marked in the overall layout diagram, and the specific checking contents are as follows: checking the installation state or omission state of all pipelines, equipment and instruments in the system; checking whether the gradient, the length and the relative distance between the instrument and the control equipment in the system meet the process requirements or not; checking whether the installation of the safety valve is correct, the gradient of the discharge pipeline and the position of the full-bore ball valve; checking the operability of the equipment, the state of a valve handle and the operating space, and the like, after the checking is finished, marking the result of the appearance checking in a system PID map, wherein a green mark indicates that the checking is not problematic, a red mark indicates that the checking is problematic, a blue mark indicates that the checking is problematic and needs further verification, and a yellow mark omits the content during the installation or the manufacture.
As shown in fig. 1, the mechanical performance test in step S300 includes pipeline and internals inspection, filter inspection in the system, circulation pump inspection, ladder and railing inspection, etc., where the internals inspection is: the internal elements of the inlet dehydration scrubber and the triethylene glycol contact tower need to be installed before the grease is added, and whether the internal elements are installed correctly is checked according to the specification;
and (3) checking a filter: the particulate filter and carbon filter are assembled and tested by the manufacturer and all tests are recorded in a signed file, and after shipping and final installation, the filter element should be installed in the filter as per the filter supplier's instructions;
and (3) testing a circulating pump: and (3) checking a delivery test report and various test content data of the circulating pump, and mainly checking leakage test data, function test data and action test data of the circulating pump.
As shown in fig. 1, the functional test in step S300 includes: the method comprises the following steps of leakage testing, instrument continuity loop testing, insulation testing, control valve testing and the like, wherein the leakage testing is pipeline leakage testing, all pipelines use 0.5-1 Bar dry gas and soap bubbles for leakage testing, the effective pressure maintaining time of the whole system is more than 10min, and finally tested leakage points are identified in a system PID;
meter continuity loop test: on the premise of integral power failure of the system, using a universal meter to check whether a loop from each instrument end to a junction box or a local control panel is normally connected;
and (3) insulation test: and on the premise of the overall system outage, checking and recording the phase-to-phase resistance and the ground resistance of each core of the cable by using an insulation meter. In the signal cable, the insulation resistance is more than 2500 ohms, the grounding resistance of different places in the sledge is checked, and the grounding resistance value of each place is not more than 1 ohm;
testing a control valve: checking whether instrument air can smoothly enter a control valve cylinder, setting correct output of a valve air conditioner according to the setting given on a control valve data table, connecting a signal generator to a wiring terminal of a control valve, and respectively outputting signals of 8mA, 12mA, 16mA, 20mA and the like, wherein the instrument air is an air source provided by a pneumatic instrument, is usually dry compressed air, checking whether the opening degree of the control valve is 25%, 50%, 75% and 100%, repeatedly testing twice in a positive sequence and a reverse sequence, and recording the output result of the control valve, wherein the control valve needs to be subjected to an emergency stop/off valve test: in the state of ventilation, a 24V power supply is connected/disconnected inside the shut-off valve junction box, and whether the shut-off valve can be opened/closed is checked; in the state of electrifying (24 v), opening/closing the instrument gas valve, checking whether the shut-off valve can be opened/closed, recording the opening/closing time of the shut-off valve, and comparing the opening/closing time with a shut-off valve data table;
on the other hand, the system also needs to be tested by the following devices, namely a differential pressure transmitter, a flowmeter and a liquid level meter: connecting a manual operator to an instrument simulation wiring terminal, modifying or simulating a threshold value or reading of an instrument through an HART protocol, and setting a zero pressure reading, wherein the calibration threshold value needs to be consistent with an instrument data table;
dew point instrument test: the factory test report and various test content data of the dew point instrument are checked, no additional test is needed, only a visual inspection line is needed, and a cable connected to a control panel is properly adjusted;
testing an electric heater: the electric heater delivery test report and various test content data are checked, no additional test is needed, only the line needs to be checked visually, and the cable connected to the control panel is adjusted appropriately.
As shown in fig. 1, the electrical loop test in step S300 includes: control and alarm test, turn-off and scram test, etc., wherein, the control and alarm test: the method comprises the steps that a sensing element, a controller and a process control element are identified in a system PID diagram, the configuration, the action and the set point of the controller are determined to be correct under an automatic mode, the position of a field instrument in a controller configuration picture is determined, a signal generator is connected to an instrument connecting terminal to simulate a 4-20mA signal, the signal generator is used for sequentially outputting 4mA, 8mA, 12mA, 16mA and 20mA, whether the corresponding instrument threshold value in the controller configuration picture changes correctly or not is checked, whether the opening of an adjusting valve in the controller configuration picture changes correctly or not is checked, the forward sequence change and the reverse sequence change are checked twice repeatedly, according to the requirement of the system PID on alarm, the signal generator is used for outputting the alarm value corresponding to the corresponding instrument, and whether the controller configuration picture alarms or not is checked;
shutdown and scram test: the method comprises the steps of marking a sensing element, a controller and a process control element in a system PID diagram, determining that the configuration, the action and the set point of the controller are correct in an automatic mode, confirming alarm point values of various alarms in a configuration picture in the automatic mode, connecting a signal generator to a wiring terminal of a target instrument, outputting the values from 4mA to 20mA, checking whether an alarm is generated, and confirming whether a corresponding alarm action is triggered after each alarm is generated according to a cause-effect diagram.
As shown in fig. 1, in step S400, purging the triethylene glycol natural gas dehydration and regeneration system with nitrogen at a pressure greater than 3Bar, wherein the number of purges is at least three, wherein it is to be understood that before purging, and after the system test result is no problem, the front and rear valves of the triethylene glycol buffer tank are closed, the triethylene glycol filling process is performed with an electric or starting pump, the liquid level of the triethylene glycol buffer tank is observed, and the triethylene glycol filling is stopped until the liquid level reaches the highest alarm level value.
In the offshore platform triethylene glycol natural gas dehydration and regeneration system, the inspection of each part of equipment, instruments, pipelines and the like is as follows:
pipeline: drainage and exhaust states, pipeline gradient requirements, pipeline supporting states, heat tracing and heat preservation pipeline coating states, whether pipeline materials and flange pound levels are correct, whether installation of joints of two different materials is correct, whether sampling point positions are correct, whether flange installation height is suitable for requirements of movement or operation of the flange, whether surrounding spaces such as flanges and bolts meet operation requirements and the like.
A manual valve: nameplate information state, direction of check valve and stop valve, whether valve operating handle is convenient for normal operation or system isolation operation, whether valve of channel protrudes valve handle.
And (3) checking the instrument: whether the flowmeter needs to be vertically installed, whether the control direction of the actuator, the direction of the flow-limiting orifice plate and the type of the liquid level meter are correct or not; the alarm switch is set to be in a state, the display state of the transmitter and the installation states of the instrument tube and the actuator.
Inspecting the tank body, the heat exchanger and the filter: data plate information state, insulation inspection completion state, blind flange and window installation state, whether drainage and exhaust function possess, whether all liquid level, pressure, temperature class instruments on the jar body are correctly installed at assigned position, entry pipeline direction, pipeline's slope requirement, operating space state, ladder and pipeline etc. have the setting state of hindrance, fixing device dismantlement manhole to the people hole.
And (3) inspecting a circulating pump: nameplate information state, insulation inspection completion state, blind flange and window installation state, drainage and exhaust function state, whether the filter is installed on the inlet pipeline or not, the damper is installed correctly, pipeline gradient requirements and whether the connecting pipeline support is proper or not.
Safety valve inspection: the nameplate information state, whether the inlet and outlet pipeline gradient meets the process requirements, the internal pipeline state, the correct installation state of the internal mechanical structure and whether the operation space meets the requirements.
Structural frame, platform and ladder inspection: whether the size of the structural part is correct, whether the size of the platform is correct, the size and the installation position of a ladder, whether the barrier is completely covered by installation, the installation state of a baffle, whether the handrail is constructed according to a map, whether the positions of a pedestrian passageway and a cross beam are correct, and the paint spraying quality.
Electrical inspection: the method comprises the steps of locally and manually controlling whether the starting/stopping of the circulating pump is met or not, automatically controlling the starting/stopping state of the circulating pump and the correct installation state of the circulating pump gland head.
Instrument and electrical installation inspection: whether the main cable runs hinder the operation of other equipment, whether the horizontally mounted cable carriage is convenient to operate, whether the location of the junction box is satisfactory for operation, whether the local control panel is easy to operate, whether the control panel door panel has sufficient open space, whether the control valve and shut-off valve have sufficient external operating space, flow-sensitive equipment, such as: whether barriers, thermocouples and plug-in instruments are pulled out or not is judged before and after pipelines such as the flow-limiting orifice plate, the temperature well and the like.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A factory debugging test method for a triethylene glycol natural gas dehydration and regeneration system of an offshore platform is characterized by comprising the following steps:
s1, preparation: preparing various test tables, logic diagrams and the like according to various components and working principles in the triethylene glycol natural gas dehydration and regeneration system;
s2, appearance inspection: performing appearance inspection on process equipment, instruments, pipeline connections and the like in the triethylene glycol natural gas dehydration and regeneration system in S1;
s3, functional check: performing functional check on the triethylene glycol natural gas dehydration and regeneration system in the S2, wherein the functional check comprises a mechanical performance test, a functional test and an electrical loop test;
s4, system purging: purging the triethylene glycol natural gas dehydration and regeneration system subjected to functionality inspection for multiple times, injecting the triethylene glycol natural gas dehydration and regeneration system into a triethylene glycol dehydration process, and then performing a whole system nitrogen sealing process;
and S5, forming a test table and a legacy item list.
2. The factory debugging test method for the offshore platform triethylene glycol natural gas dehydration and regeneration system according to claim 1, wherein in step S1, each test table and logic diagram comprises a system PID diagram, a component system PID diagram of each type, a thermal balance calculation file, a cause and effect diagram, an instrument list, a control logic diagram, an inspection and test plan, a terminal wiring diagram, a system operation manual, a circulation pump test report, an electric heater test report, and the like.
3. The factory commissioning test method of offshore platform triethylene glycol natural gas dehydration and regeneration system according to claim 2, wherein in step S2, appearance inspection of equipment, instruments, pipelines and the like is performed according to system PID diagram, and appearance inspection problems and states are marked by different colors in the overall layout diagram.
4. The factory commissioning test method of offshore platform triethylene glycol natural gas dehydration and regeneration system according to claim 1, wherein said mechanical performance test in step S3 comprises pipeline and internals inspection, in-system filter inspection, circulation pump inspection, ladder and railing inspection, etc.
5. The factory commissioning test method of the offshore platform triethylene glycol natural gas dehydration and regeneration system of claim 1, wherein the functional test in step S3 comprises: leakage test, instrument continuity loop test, insulation test, control valve test, and the like.
6. The factory commissioning test method of the offshore platform triethylene glycol natural gas dehydration and regeneration system of claim 1, wherein the electrical loop test in step S3 comprises: control and alarm test, shut-off and emergency stop test, etc.
7. The factory debugging test method for the offshore platform triethylene glycol natural gas dehydration and regeneration system according to claim 5, wherein the leakage test is a pipeline leakage test, wherein all pipelines use 0.5-1 Bar dry gas and soap bubbles for leakage test, the effective pressure maintaining time of the whole system is more than 10min, and the finally tested leakage point is identified in the system PID.
8. The factory debugging test method for the offshore platform triethylene glycol natural gas dehydration and regeneration system according to claim 5, wherein in the control valve test, whether instrument gas can smoothly enter a control valve cylinder is checked, the correct output of a valve air conditioner is set according to the setting given on a control valve data sheet, a signal generator is used for connecting a connecting terminal of the control valve, signals such as 8mA, 12mA, 16mA and 20mA are respectively output, whether the opening degree of the control valve is 25%, 50%, 75% and 100% is checked, the test is repeated twice in the positive sequence and the negative sequence, and the output result of the control valve is recorded.
9. The offshore platform triethylene glycol natural gas dehydration and regeneration system factory commissioning test method according to claim 3, wherein in the appearance inspection result of the system PID diagram, green mark is no problem for inspection, red mark is problem after inspection, blue mark is problem for inspection and needs further verification, and yellow mark is missing the content at installation or manufacture.
10. The factory commissioning test method of the offshore platform triethylene glycol natural gas dehydration and regeneration system of claim 1, wherein in step S4, the triethylene glycol natural gas dehydration and regeneration system is purged with nitrogen at a pressure greater than 3Bar, wherein the number of purges is at least three.
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Application publication date: 20210115 |