Модернизация установки Депарафинизация с целью снижения энергопоребления

3.5 Расчет выводимых  теплообменников

 

Из практических данных работы установки составим таблицу 3.16, в которой посчитана тепловая нагрузка выводимых теплообменников.

Таблица 3.16   - Тепло выводимых  теплообменников

Наименование	Gпрод , кг/ч	Q, кДж/ч	tвх	tвых
Т-13 Т-14, 14а Т-15 Т-16	66566,7 42181,79 18540,49 16288,45	11276399,0 12270682,7 1401661,0 355739,7	110 120 160 165	125 170 175 168
ИТОГО		25304482,4

 

3.6 Поверочный  расчет теплообменников Т-11, Т-11а,  Т-12, Т-12а

 

Поверочный расчет теплообменников проводится при помощи программы PRO II на ПЭВМ. Расчет представлен в приложении А, составим таблицу расчета теплообиенников.

 

Таблица 3.17 - Данные расчета теплообменников Т-11, Т-11а, Т-12, Т-12а

Наимено вание	Т-11		Т-11а		Т-12		Т-12а
	Труб. простр.	Меж- труб. простр.	Труб. простр.	Меж- труб. простр.	Труб. простр.	Меж- труб. простр.	Труб. простр.	Меж- труб. простр.
Расход, кг/ч	Сырье   66568	Пары с К –1 24385	Деп. масло 15425	Сырье   66568	Сырье   66568	Пары с К-2 23641	Сырье   66568	Пары с К-2 23641
tвх/tвых ,оС	10/70	120/92	160/125	70/79	79/85	106/90	85/115	170/115
Коэффиент теплопередачи кДж/м2*К	1224		144		1152		1404
Тепловая нагрузка, МкДж/ч	7,91		1,291		0,825		11,758

 

Вывод: на существующих теплообменниках Т-11, Т-11а, Т-12, Т-12а обеспечивается необходимый нагрев сырья на входе в колонну К-1.

 

 

 

 

 

 

Приложение  А – Поверочный расчет теплообменников  Т-11,     11а, 12,12а

 

$ Generated by PRO/II Keyword Generation System <version 3.37 - 09-16-97>

$ Generated on: Fri Jun 11 15:52:20 2004

TITLE

  DIMENSION SI, TEMP=C

  SEQUENCE SIMSCI

  CALCULATION RVPBASIS=APIN, TVP=37.778

COMPONENT DATA

  LIBID 2,TOLUENE/3,MEK

  PETRO 1,DEPMASLO,,884,475

  PHASE VL=1

THERMODYNAMIC DATA

  METHOD SYSTEM=SRK, TRANSPORT=PETR, SET=SRK01, DEFAULT

STREAM DATA

  PROPERTY STREAM=S1, TEMPERATURE=10, PRESSURE=370, PHASE=M, &

         RATE(WT)=66566.5, COMPOSITION(WT)=1,0.231/2,0.308/3,0.461

  PROPERTY STREAM=S6, TEMPERATURE=120, PRESSURE=220, PHASE=M, &

         RATE(WT)=24384.9, COMPOSITION(WT)=2,0.292/3,0.708

  PROPERTY STREAM=S8, TEMPERATURE=160, PRESSURE=150, PHASE=M, &

         RATE(WT)=15425.5, COMPOSITION(WT)=1,0.99892/2,0.00102/3,6E-5

  PROPERTY STREAM=S12, TEMPERATURE=170, PRESSURE=300, PHASE=M,  &

        RATE(WT)=23641.3, COMPOSITION(M)=2,0.472/3,0.528

UNIT OPERATIONS

  HXRIG UID=T-11

      TYPE TEMA=AES, ORIENTATION=HORI, FLOW=COUN, AREA=130

      TUBES FEED=S1, M=S2, OD=25, ID=20, PATTERN=60, PITCH=26, &

                 DPUNIT=10

      SHELL FEED=S6, M=S7, SERIES=2, DPUNIT=100, ID=720

      SNOZZLE TYPE=CONV

      HXCALC DPSMETHOD=BELL

      PRINT EXTENDED

      OPERATION TTEMP=70

  HXRIG UID=T-11A

      TYPE TEMA=AES, ORIENTATION=HORI, FLOW=COUN, AREA=70

      TUBES FEED=S8, M=S9, OD=25, ID=20, PATTERN=60, PITCH=26, &

                 DPUNIT=10

      SHELL FEED=S2, M=S3, DPUNIT=130, ID=529

      SNOZZLE TYPE=CONV

      HXCALC DPSMETHOD=BELL

      PRINT EXTENDED

      OPERATION TTEMP=125

  HXRIG UID=T-12A

      TYPE TEMA=AES, ORIENTATION=HORI, FLOW=COUN, AREA=130

      TUBES FEED=S4, M=S5, OD=25, ID=20, PATTERN=60, PITCH=26, &

                 DPUNIT=18

      SHELL FEED=S12, M=S10, DPUNIT=80, ID=720

      HXCALC DPSMETHOD=BELL

      PRINT EXTENDED

      OPERATION TTEMP=115

  HXRIG UID=T-12

      TYPE TEMA=AES, ORIENTATION=HORI, FLOW=COUN, AREA=130

      TUBES FEED=S3, M=S4, OD=25, ID=20, PATTERN=60, PITCH=26, &

                 DPUNIT=12

      SHELL FEED=S10, M=S11, SERIES=2, DPUNIT=110, ID=720

      HXCALC DPSMETHOD=BELL

      PRINT EXTENDED

      OPERATION TTEMP=85

END

 

SIMULATION SCIENCES INC.               R                              PAGE P-4

                                  PRO/II  VERSION 5.0                    386/EM

                                         OUTPUT                               

                            RIGOROUS HEAT EXCHANGER SUMMARY                   

==============================================================================

 

            SHELL AND TUBE EXCHANGER DATA SHEET FOR EXCHANGER 'T-11'

I----------------------------------------------------------------------------I

I EXCHANGER  NAME                             UNIT ID T-11                   I

I SIZE  720 - 6096 TYPE AES    HORIZONTAL     CONNECTED 1 PARALLEL  2 SERIES I

I AREA/UNIT   260. M2                         AREA/SHELL   130. M2           I

I----------------------------------------------------------------------------I

I PERFORMANCE OF ONE UNIT           SHELL-SIDE               TUBE-SIDE       I

I----------------------------------------------------------------------------I

I FEED STREAM ID                      Пары с К-1                Сырье        I

I FEED STREAM NAME                                                           I

I TOTAL FLUID           KG/HR          24385.                   66567.       I

I      VAPOR  (IN/OUT)  KG/HR    24385. /     5019.              /           I

I      LIQUID           KG/HR           /    19366.       66567. /    66567. I

I      STEAM            KG/HR           /                        /           I

I      WATER            KG/HR           /                        /           I

I      NON CONDENSIBLE  KG/HR                                                I

I TEMPERATURE (IN/OUT)  DEG C     120.0 /      91.6         10.0 /      70.1 I

I PRESSURE    (IN/OUT)    KPA    220.00 /    120.00       370.00 /    360.00 I

I----------------------------------------------------------------------------I

I SP. GR., LIQ  (4C / 4C H2O)           /    .829           .845 /    .845   I

I          VAP  (4C / 4C AIR)     2.658 /   2.580                /           I

I DENSITY,   LIQUID     KG/M3           / 753.433        836.075 / 772.727   I

I            VAPOR      KG/M3     5.479 /   3.069                /           I

I VISCOSITY, LIQUID       PAS           / 2.4E-04        4.5E-04 / 2.6E-04   I

I            VAPOR        PAS   9.1E-06 / 8.4E-06                /           I

I THRML COND,LIQ        W/M-K           /   .1205          .1298 /   .1120   I

I            VAP        W/M-K     .0209 /   .0178                /           I

I SPEC.HEAT,LIQUID    KJ/KG-K           /  2.2358         1.9228 /  2.1877   I

I           VAPOR     KJ/KG-K    1.6803 /  1.6104                /           I

I LATENT HEAT           KJ/KG        410.95                                  I

I VELOCITY              M/SEC          5.69                      .53         I

I DP/SHELL                KPA         50.00                     5.00         I

I FOULING RESIST      M2-K/KW   .35222                           .35222      I

I----------------------------------------------------------------------------I

I TRANSFER RATE       KW/M2-K  SERVICE     .35                 CLEAN     .48 I

I HEAT EXCHANGED      M*KJ/HR    7.912   MTD(CORRECTED)    64.7  FT     .983 I

I----------------------------------------------------------------------------I

I CONSTRUCTION OF ONE SHELL         SHELL-SIDE               TUBE-SIDE       I

I----------------------------------------------------------------------------I

I DESIGN PRESSURE         KPA        2068.                    2068.          I

I NUMBER OF PASSES                      1                        2           I

I MATERIAL                          CARB STL                 CARB STL        I

I INLET  NOZZLE ID         MM         336.5                    154.1         I

I OUTLET NOZZLE ID         MM         336.5                    154.1         I

I----------------------------------------------------------------------------I

I TUBE: NUMBER   277  OD 25.000  MM   THICK 2.500  MM    LENGTH   7.1  M     I

I       TYPE BARE                     PITCH  26.0  MM    PATTERN 60 DEGREES  I

I SHELL:  ID  720.00 MM               SEALING STRIPS   0 PAIRS               I

I BAFFLE: CUT  .200 SPACING (IN/CENT/OUT): MM  168.00/ 144.00/ 168.00,SINGLE I

I RHO-V2: INLET NOZZLE   1058.2 KG/M-SEC2                                    I

I TOTAL WEIGHT/SHELL,KG     2334.4 FULL OF WATER    7912.7  BUNDLE    3395.7 I

I----------------------------------------------------------------------------I

 

SIMULATION SCIENCES INC.               R                              PAGE P-7

                                  PRO/II  VERSION 5.0                    386/EM

                                         OUTPUT                               

                            RIGOROUS HEAT EXCHANGER SUMMARY                   

==============================================================================

 

           SHELL AND TUBE EXCHANGER DATA SHEET FOR EXCHANGER 'T-11A'

I----------------------------------------------------------------------------I

I EXCHANGER  NAME                             UNIT ID T-11A                  I

I SIZE  529 - 6096 TYPE AES    HORIZONTAL     CONNECTED 1 PARALLEL  1 SERIES I

I AREA/UNIT    70. M2                         AREA/SHELL    70. M2           I

I----------------------------------------------------------------------------I

I PERFORMANCE OF ONE UNIT           SHELL-SIDE               TUBE-SIDE       I

I----------------------------------------------------------------------------I

I FEED STREAM ID                      Сырье                   Депмасло       I

I FEED STREAM NAME                                                           I

I TOTAL FLUID           KG/HR          66567.                   15425.       I

I      VAPOR  (IN/OUT)  KG/HR           /                        /           I

I      LIQUID           KG/HR    66567. /    66567.       15425. /    15425. I

I      STEAM            KG/HR           /                        /           I

I      WATER            KG/HR           /                        /           I

I      NON CONDENSIBLE  KG/HR                                                I

I TEMPERATURE (IN/OUT)  DEG C      70.1 /     79.2        160.0 /     125.0  I

I PRESSURE    (IN/OUT)    KPA    360.00 /    230.00       150.00 /    140.00 I

I----------------------------------------------------------------------------I

I SP. GR., LIQ  (4C / 4C H2O)      .845 /    .845           .885 /    .885   I

I          VAP  (4C / 4C AIR)           /                        /           I

I DENSITY,   LIQUID     KG/M3   772.727 / 763.227        807.883 / 825.824   I

I            VAPOR      KG/M3           /                        /           I

I VISCOSITY, LIQUID       PAS   2.6E-04 / 2.4E-04           .007 /    .014   I

I            VAPOR        PAS           /                        /           I

I THRML COND,LIQ        W/M-K     .1120 /   .1094          .0846 /   .0880   I

I            VAP        W/M-K           /                        /           I

I SPEC.HEAT,LIQUID    KJ/KG-K    2.1877 /  2.2258         2.4560 /  2.3245   I

I           VAPOR     KJ/KG-K           /                        /           I

I LATENT HEAT           KJ/KG                                                I

I VELOCITY              M/SEC          1.61                      .23         I

I DP/SHELL                KPA        130.00                    10.00         I

I FOULING RESIST      M2-K/KW   .35222                           .35222      I

I----------------------------------------------------------------------------I

I TRANSFER RATE       KW/M2-K  SERVICE     .04                 CLEAN     .05 I

I HEAT EXCHANGED      M*KJ/HR    1.291   MTD(CORRECTED)    66.3  FT     .988 I

I----------------------------------------------------------------------------I

I CONSTRUCTION OF ONE SHELL         SHELL-SIDE               TUBE-SIDE       I

I----------------------------------------------------------------------------I

I DESIGN PRESSURE         KPA        2068.                    2068.          I

I NUMBER OF PASSES                      1                        2           I

I MATERIAL                          CARB STL                 CARB STL        I

I INLET  NOZZLE ID         MM         154.1                     77.9         I

I OUTLET NOZZLE ID         MM         154.1                     77.9         I

I----------------------------------------------------------------------------I

I TUBE: NUMBER   148  OD 25.000  MM   THICK 2.500  MM    LENGTH   6.8  M     I

I       TYPE BARE                     PITCH  26.0  MM    PATTERN 60 DEGREES  I

I SHELL:  ID  529.00 MM               SEALING STRIPS   0 PAIRS               I

I BAFFLE: CUT  .200 SPACING (IN/CENT/OUT): MM  138.50/ 105.80/ 138.50,SINGLE I

I RHO-V2: INLET NOZZLE   1273.6 KG/M-SEC2                                    I

I TOTAL WEIGHT/SHELL,KG     1860.0 FULL OF WATER    4956.4  BUNDLE    1916.5 I

I----------------------------------------------------------------------------I

 

SIMULATION SCIENCES INC.               R                             PAGE P-10

                                  PRO/II  VERSION 5.0                    386/EM

                                        OUTPUT                               

                            RIGOROUS HEAT EXCHANGER SUMMARY                   

==============================================================================

 

           SHELL AND TUBE EXCHANGER DATA SHEET FOR EXCHANGER 'T-12'

I----------------------------------------------------------------------------I

I EXCHANGER  NAME                             UNIT ID T-12                   I

I SIZE  720 - 6096 TYPE AES    HORIZONTAL     CONNECTED 1 PARALLEL  2 SERIES I

I AREA/UNIT   260. M2                         AREA/SHELL   130. M2           I

I----------------------------------------------------------------------------I

I PERFORMANCE OF ONE UNIT           SHELL-SIDE               TUBE-SIDE       I

I----------------------------------------------------------------------------I

I FEED STREAM ID                     Пары с К-2                 Сырье        I

I FEED STREAM NAME                                                           I

I TOTAL FLUID           KG/HR          23641.                   66567.       I