Document V3jEyaEq6YNvxpq7zRbpKBKKN

EVC Americas Brunner House A NOTES OF THE KICK OFF MEETING OKLAHOMA SLURRY STRIPPING UNIT VISTA CHEMICALS 9 February 1993 People present: Douglas Michels Peter Schirber Clav Fenton Andy Wiles Tom Snow Chris Jones Vista Vista Vista Vista EVC EVC 1. Basic Design Criteria 1.1.Site and number of columns Oklahoma City Two columns 1.2. Design Throughput Maximum 15 tonne/hr of PVC / Minimum 7.5 t/hr PVC What is actually measured is the liquid flow rate and the PVC rate will depend on the concentration in slurry. The slurry concentrations are defined in section 1.8 * .* 1.3. Grade i One grade only at Oklahoma City: 5385 i * 1.4. Slurry temperature At stripper feed pump: 120F Slurry temperature after the interchanger will be determined by the heat balance and there is assumed to be no need for an additional after cooler. The slurry temperature should be between 160 and 170 F 1 Slurry pressure at stripper feed vessel Range of pressure: 20 to 30 psig. Normally 25 psig. , L -* * Typical properties and test methods IV 0.9 to 0.95 = K value 65.5 to 68.2 Mean Grain size typically 150 p J Passing 140 mesh 8 to 15 % Passing 200 mesh 2 to 2.5%, .. rinjJi Apparent density (=bulk density by Vista test) 0.57 g/cc typical, 0.54 g/cc min Colour, B value 2.5 typical, 3.5 max Heat stability, 4 max VAB.0001097999 WTSTA KO.DOC (ra v+'v' Miw' Mi IIIIWW ? nf 10 VC MU imwi k^ip ^ n /rn /9^ t Contamination 75 max (dark particles per 100 g on Syntron trough) 30 is typical rr^H.- VCM in slurry, (in dry polymer) Test by EPA method. Vista provided for reference, test methods for contamination, (OKC #5A), cold plasticizer absorption (ASTM D3367) Strategy for plant operation The six reactors will operate as one stream, running down into two rundown vessels. Simultaneous rundowns will not be allowed. The rundown vessels will operate at 85 to 60 psig and they will feed continuously into a stripper feed tank operating at between 20 and 30 psig. Slurry concentration % Min from the reactor 36 after rinsing the reactor 31 after rinsing the rundown lines 27 Average 37.5 34.6 30 Max 39 36 36 2. Location / Plot plan 2.1. Distances See plot plan * 2.2. Elevations Equipment can be mounted at grade or as required for NPSH and gravity flow lines. 2.3. Hazardous area... Class I Div. II Group D 4 3. Definition of Battery limits Slurry: Feed in to the stripper feed vessel " ~ Slurry to the blend tanks l\ ; " _________ _______ i. VC Gas From the top of the column .'V'--* -- From the stripper feed vessel 'Antifoam Make up tank, pumped circulation loop and injection points to run down system and to the stripper feed. / . - Utilities As required by each unit. Rinse water, cooling water 4 V -*1 ^ 4. Flowsheet steam, condensate for desuperheater. V- 4.1. Blowdown Vista's scope. At present it is expected that this will be two vessels operated in parallel.(32000 gal each). This may be replaced by a VAB.0001098000 Xt \ t/TPTa yr r~> /^\ o_ . _ r -i a i ii T -i -i /not single vessel if proved feasible and economic. EVC to comment on Vista's proposals. 4.2. Stripper feed vessel In the EVC scope. Vista have anticipated a residence time of 5 min but EVC will check this. It will operate at 20 to 30 psig. Design pressure should be 150 psig. 4.3. Pumps Stripper feed pumps will be installed with one per stream and a common spare. The stripper bottoms pumps will have one for each stream with no common spare to minimise dead spots where hot slurry might accumulate and degrade. Tandem seals to be used. EVC will provide recommendations for the mechanical construction of these pumps to increase their reliability. 4.4. Filters No filter to be provided in EVC scope. Coarse material greater than 4 mm will be removed by filtration before the blowdown vessel. 4.5. Heat interchanger EVC to specify 4.6. Heat recovery scheme It is not planned to try to recover heat from the condenser 4.7. Column -------- EVC to specify. The two columns should be free standing and close enough to allow a common access platform 4.8. Condenser Limitation on temperature of gas outlet. Not more than 130 F Minimize dP on the condenser. Vista does not propose to have a separate pressure control on each column. The columns will be connected directly to the suction of the recovery compressors which will have pressure control of the suction by recycling gas from the delivery. Since accurate pressure control of the top of the column is essential to the stable operation of the column, EVC will specify the maximum tolerance of the pressure variations for this system to be successful. (0.02 bar g /0.3 psig) was stated at the meeting but to be confirmed) ICI Australia have just installed a conventional shell and tube * instead of a spiral, on cost grounds. EVC will propose a similar one for Vista. 4.9. Antifoam EVC specifies the use of Bevaloid 6683. Vista should contact Derek Clark of Rhone Poulenc Chemicals, Beverley. Fax no (44) 482 860 598. They should ask for evaluation samples to test and approve. A VAB.0001098001 \VISTA KO.DOC " " .................. imi hijy ifr^ip.............................................................................................................................................................................................................................................. ... .**.-*****.-+ Paee4 of 10 M Issue 3 11/03/93 'Hi- The system will include make up tank, agitator, circulating pumps, injection systems. 5. Instruments / Control 5.1. a 5.2. Computer / DCS A new computer system is to be installed at Oklahoma, probably a Taylor Mod 300. All normal operations are to be under computer control. Non-routine operations such as isolation for maintenance will not be automated to the same extent. Sequence definition Will be defined in the form of an English description of the operating states and how to change from one state to another, and the actions in case of abnormal condition. 5.3. Local instruments 4 EVC will give its recommendations. Vista may add to these during the detailed design if they require. Normally there will be no bypasses around the control valves. Local temperature and o* ressure indicators will be installed with board indicatinsO instruments. No local flow indicators. Orifice flanges on inlet side of cooling water to condenser, but no indication unless required for control. . ;.i*r 5.4. What operations are to be done manually? Only non-routine operations such as isolation for maintenance. * 6. Requirements for emergency situations / power failure p Frequency of interruptions Power failure relatively frequent, about once per month Steam failure several times a year. * During such emergency situations, it is not acceptable to discharge slurry to the'sewer or to put unstripped slurry to the blend tank. Space will be allowed in the column sump for the dumping of the slurry in case of outlet pump failure. Provision of rinse water: *i. Rinse water (city water) is said to be reliable or at least it is most unlikely that there is a failure of rinse water at the same time as the failure of electricity or steam. Rinsing nozzles in dump and feed tank. * + * * s'* EVC will determine whether placing the stripper bottoms pumps on emergency power is the best option for handling power outages. Vista will determine if there is capacity in the emergency power system for the stripper bottoms pumps. \VISTA KO.DOC Paec* 5 of 10 41 lllim MHH4 VAB.0001098002 Issue 3 11/03/93 mm w .iiiim 3HT*7K"-H ll| |1>|M| 4 7. Codes and Standards 7.1. Environmental and safety standards Gaseous Effluents: Present limits are 420 ppm (on a PVC basis) total emission from the reactor and downstream, excluding fugitive emissions. This is based on a 24 hr average. However, by closing the reactor process and installing a continuous stripper, and sending the recovery vent to an incinerator, Vista is expecting much lower than this to cover possible future emission limits. Liquid effluents Liquid effluent should have no more than 200 ppb of VCM in the liquid phase. Solids are not a problem because there is an effective solids separation system. VCM in PVC should not exceed 1 ppm Safety Relief valves will have rupture disks beneath them. They will not need to be duplicated with block valves beneath them. All relief valves discharge to atmosphere at a safe location, except for thermal expansion RVs There are no hard wired interlocks, independent of the computer in this section of the plant. A manually initiated shutdown button may be added by Vista at the detailed design stage if required. b Isolation for maintenance Equipment will be purged with water before bringing it on line after opening for maintenance. Spectacle blinds at the inlet and outlet of equipment requiring routine maintenance, (inlet and outlet of pumps and spiral heat exchanger) 7.2. Design Codes JH r* As detailed in the attached list t F 7.3. Units of measurement for design Flow '^ Gas -v Liquid -i ...Steam acfm US gpm lb/hr -Pressure Gauge Absolute dP Psig ' psia psi Heat Temperature F Heat Duty Btu/hr Heat Transfer coefficient Btu/hr,ft2,F Thermal Conductivity Btu/hr,ft,F Heat Capacity Btu/lb,cF Fouling resistance Hr,ft2,F/Btu VAB.0001098003 \VISTA KC.DOC I'll 4CVMH-ftr4vTM3itrtipi*fr-4--| -"! . r -i>- 1-1Hi Paee 6 of 10 m/mm m Piiiami Issue 3 11/03/93 Heat exchangers Area Tube Diameter Tube Thickness Tube length Shell diameter ft2 in in ft in Power kW Viscosity cP Dimensions ft, in Volume liq US gal vap ft3 solid ft3 7.4. Equipment numbering EVC numbers to be used 7.5. Instrument numbering EVC numbers to be used 7.6. Vessel connections 1W' min process connections on pressure vessels. Pressure gauges should be on a 1" flange. All flanged connections. 8. Materials of construction EVC will make recommendations. In general 316L will be recommended for slurry up to the spiral exchanger. Duplex steel will be recommended for the spiral heat exchanger and for the hot slurry piping and the column. 316L will also be given as an option and Vista may go for quotations for this, but there is a chance of chloride stress corrosion cracking. FTMl No asbestos gaskets. Vista will advise alternative materials \ \ f: t . jtr + 9. Meteorological / site data Height above sea level Barometric pressure Temperatures 1255 ft 14.06 psia 96.97 kPa 9 F exceeded 99 % of the winter 100 F exceeded 1 % of the summer 10. Utilities / r 10.1. Steam Temp Pressure Impurities 366 F (saturated) 125-165 psig Free of any contaminants which could affect PVC quality VAB.0001098004 + H|^l l \VISTA KO.DOC mmwm Paee 7 of 10 ntfmmH Issue 3 11/03/93 i ii^wwtiwwpww--w----mrntrmmimm--i***** i -------------------------------------------------------------- -- 10.2. Cooling water Temp Pressure Fouling 10.3. Water: Rinse water Pressure /Tempera ture Quality Reclaimed (centrate) water Seal water 10.4. Electrical power Voltage, frequency Reliability Instrument power 10.5. Instrument air Pressure Dew point 10.6. 10.7 H H, Nitrogen . p Condensate *- ^ % . w Pressure Purity 1, r * "J ** Assumed available during power failure. 85 F maximum 80 psig at grade (supply) design 150 psig 40 psig (assumed for return) 0.002 Hr,ft2,F/Btu Assumed available during power failure 40 to 60 psig / 70F good enough for polymerisation so good enough for rinsing 100 psig. 100 For rinsing out the feed vessel. Filtered to 50 microns t, but containing the impurities to be expected from centrifuge centrate. 180 to 200 psig p 480 v 3 phase 60 Hz Frequent failures, 1 / month Emergency back up power available for critical drives. 24 vDC 80 psig (100 psig max) -40 F Not available. To be used for desuperheating. 25 to 60 psig Free of any contaminants which could affect PVC quality A BED Contents 111. r* / 11.2. Process description Operation English description of the operating sequence for the computer. 11.3. Flowsheet / Mass balance -4 11.4. P&I 11.5. Process Equipment specs VAB.0001098005 \VTSTA_KO.DOC Pace 8 of 10 l > III P' n> gum. Issue 3 11/03/93 I--I. >-[rminTWMiiKa-irTfwr<iWiWf*T^M^^^w^^ii* 11.6. Process Instrument specs 11.7. Relief devices 11.8. Items for review bv EVC 11.9. Pipe specs (Vista to provide their existing standards for EVC to review) 11.10. Raw materials 11.11. Motor list 11.12. Typical Plot plan 11.13. Typical detail drawings for information -s A 12. Co-ordination procedure 12.1. EVC Project Number VIS 160 12.2. Vista Project Number RO-05-023-069 12.3. Vista Addresses Technical Matters P Schirber Vista Chemicals 900 Threadneedle, Houston, Texas 77079 POBox 19029(77224) Tel 713 588 3841 Fax 713 588 3950 Commercial Matters E Meyer Vista Chemicals '' 900 Threadneedle,^ Houston, Texas 77079 PO Box 19029(77224) V1 I Tel 713 588 3249 Fax 713 588 3950 12.4. EVC Addresses r "" V 4 Commercial: A B Stryker European Vinyls Corporation (Americas) Inc. Licensing Department, Bedford Building 3531 Silverside Road, Wilmington DE 19810, USA * /; *- * * -1 v,' / / Tel 302 479 1500 Fax 302 479 1514 Technical: CG Jones European Vinyls Corporation (Americas) Brunner House, Winnington PO Box 7 Northwich Cheshire CW8 4DJ England Tel (+44) 606 704665 Fax (+44)606 783717 VAB.0001098006 \VISTA KC.DOC Pace 9 of 10 - -*** vMf-.ifv <i i.mii I ,^ P III l III lH issue 3 11/03/93 12.5. Numbering system for messages From EVC UK to Vista EVC/V - 001 From Vista to EVC UK VIS/E - 001 12.6. Reviews If required, Vista may visit the UK to review the package, during preparation Arrangements will be made later 12.7. Delivery date of BED March 29 12.8. Follow up after BED in Houston as required for clarification of the package and follow up during the detailed design. A r * ti / * * A * r r J \VISTA_nO.DOC Md t^1 wqi i inmj 'M1 i Pa^e 10 of 10 m VAB.0001098007 IssueS mi n i.......................... ............. 11/03/93