P&ID extraction for carbon capture and storage.
A capture unit is an amine system bolted onto someone else's flue gas or process stream, followed by compression, dehydration, a pipeline and an injection well. The absorber and stripper look like gas treating; the compression train looks like a gas plant; the pipeline and wellhead look like midstream. The drawing set inherits all three conventions, and the monitoring, reporting and verification plan that the credit depends on is written against the instruments on those sheets.
What carbon capture and storage drawings carry.
- The absorber inlet carries the host plant's flue gas, so the first sheets are direct-contact cooling, SO2 polishing and a booster blower, with analyzers on both sides of the absorber for capture-rate accounting
- Solvent management is instrument-dense: lean and rich loading analyzers, reclaimer level and temperature, filtration differential pressure, and make-up dosing all sit on the amine loop sheets
- CO2 compression is multi-stage with interstage cooling and knockout. Anti-surge, seal gas and vibration monitoring read like any gas-plant compressor; the difference is the dense-phase discharge conditions
- Dehydration sets the material spec break. Wet CO2 upstream of the TEG or sieve is corrosive service and the line list has to carry the change
- Pipeline and wellhead sheets carry custody-transfer metering, pressure and temperature at the injection wellhead, and downhole gauges that report to the MRV plan rather than to the DCS
- MRV instruments have their own register: the meters and analyzers named in the monitoring plan need calibration and uncertainty records that the plant's I/O list does not carry
- Capture retrofits on cement, steel, power and hydrogen plants tie into a host unit drawn decades earlier, so the tie-in drawings mix the host's convention with the capture EPC's
- Tag conventions follow the EPC: ISA 5.1 on most North American projects, KKS on European power-plant retrofits, the host's house rule at the tie-in
What the extraction delivers.
- I/O list per area: flue-gas conditioning, absorber and stripper, reboiler and reclaimer, CO2 compression and dehydration, pipeline and injection
- Instrument index reconciled to the IFC set, with the custody and MRV metering separated from process control
- Equipment list covering blowers, absorber and stripper columns, lean and rich amine exchangers, reboilers, compressor stages, TEG or molecular-sieve dehydration and injection pumps
- Line list carrying CO2 service, dense-phase design pressure and the material spec breaks at the dehydration outlet
- Valve list with fail position for the compressor recycle, anti-surge and pipeline isolation valves
- SIS subset for CO2 detection, compressor trips and pipeline overpressure
- Revision comparison across the capture-unit tie-in to the host plant
Instrument tags on a carbon capture and storage drawing.
- AT-ABS-1102CO2 analyzer at the absorber outlet, the capture-rate measurement
- TT-STR-1210Stripper overhead temperature
- AT-LA-1305Lean amine loading analyzer on the loop return
- PT-CMP-2103-2oo3Third-stage compressor discharge pressure, voted 2oo3
- AT-DH-2401Moisture analyzer at the dehydration outlet
- FT-CT-3001Custody-transfer CO2 flow meter at the pipeline inlet, named in the MRV plan
Regulatory context.
- US EPA 40 CFR Part 98 Subpart RR sets the monitoring, reporting and verification plan for geologic sequestration; the plan names the flow meters and analyzers that quantify injected CO2
- US EPA Class VI underground injection control permits govern injection wells and the monitoring instruments on them
- Section 45Q credits are claimed against the quantities those MRV instruments report
- Alberta's TIER regulation and the CSA Z741 standard for geological storage of CO2 apply to Canadian projects
- ISO 27913 covers CO2 pipeline transportation, ISO 27914 geological storage and ISO 27919 capture performance evaluation
- IEC 61511 governs the SIS on the compression train and pipeline as on any process plant
Which discipline reads it.
Process EngineersAmine loop balance, reclaimer and filtration scope, compression train interstage conditions.Controls EngineersCapture-rate analyzers, anti-surge and recycle control, pipeline and wellhead telemetry.Functional Safety EngineersCO2 detection, compressor trips, pipeline overpressure and the host-plant tie-in interlocks.Project EngineersRetrofit tie-in scope, MOC on the host unit, MRV instrument list for the monitoring plan.
Common questions
Does the extraction separate the MRV metering from the process instruments?
The instrument index carries every tag with its service and sheet. The custody and MRV meters read like any other instrument; the register is filtered on the service and area columns to produce the MRV instrument list the monitoring plan references. The plan itself, and the uncertainty calculations, remain the operator's documents.
Our capture unit ties into a power plant drawn in KKS. Which convention does the register use?
The one on each sheet. A tag is read as drawn, so KKS tags from the host and ISA tags from the capture EPC sit in the same register with their own sheet reference, and the tie-in drawings that carry both are read as they are printed.
Can the same workspace hold the capture unit, the pipeline and the injection site?
Yes. One workspace per project, with extraction segmented by drawing area, so the compression train and the wellhead are separate areas of one register rather than separate projects.
Does the line list capture the dense-phase and wet-CO2 spec breaks?
The line list carries what the drawing prints: size, spec, service, design conditions where they appear on the sheet. Wet and dry CO2 service and the spec change at the dehydration outlet come through as printed; downstream filtering on the spec column produces the corrosion-service subset.
Is a capture retrofit treated as brownfield?
The host plant side is. Its drawings are read like any legacy set, scanned or vector, and the tie-in scope is compared revision to revision so the MOC record shows exactly which host instruments and lines the retrofit touched.
Run it on your carbon capture and storage drawings.
Upload a P&ID set and see the instruments, equipment, and lines it reads before committing to a plan.