Thermocompressor Brochure, Summaries of Industrial Chemistry

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Thermocompressors

Engineered for Efficiency

F L U I D H A N D L I N G

- Recirculating

and booster

thermocompressor

applications

- Energy-efficient steam

jet compressors

KADANT JOHNSON LLC

Kadant steam jet thermocompressors are designed to recirculate steam or

boost lower-pressure steam for reuse in a variety of process applications

in pulp and paper, petrochemical, food processing, desalination, and

specialty chemical production.

How Thermocompressors Work

Thermocompressors are designed to accurately mix lower-pressure steam

with higher-pressure steam. The higher-pressure motive steam entrains

the lower-pressure steam and increases its pressure.

The motive steam is introduced through the nozzle of the

thermocompressor. As the nozzle opens, the high-velocity motive

steam draws the lower-pressure steam into the thermocompressor

body. An exchange of momentum occurs as the steam flows are mixed

and the mixed flow is accelerated to high-velocity with a uniform profile

in the mixing chamber of the thermocompressor.

As the mixed flow enters the diffuser section, the diffuser flow area

gradually increases to allow the velocity of the mixed flow to be reduced.

As the velocity is reduced, the steam pressure increases. At the end of the

diffuser, the discharge steam pressure is higher than the lower-pressure

suction flow entering the thermocompressor.

The motive flow is accelerated at the nozzle and a

high-velocity jet is created. The jet transfers momentum

to the suction flow and accelerates it as the two flows mix.

Nozzle

Mixing

chamber

Diffuser

High-pressure

steam

Low-pressure

steam

Actuator

Discharge

Pressure [bar] Cut Plot 1: contours

1000 923 846 769 692 615 538 462 385 308 231 154 77 0 Velocity [m/s] Cut Plot 1: contours

Thermocompressors

Features Benefits

• Computational fluid dynamics used to

model flow characteristics

• Nozzle and mixing chamber are sized based

on specific operating conditions

• Retrofit existing installations without piping

modifications

• Optimized thermocompressor geometry
  • Entrainment efficiency improvements up to

25% compared to conventional designs

• Minimize high-pressure motive steam use
• Low-cost upgrade to latest jet compressor

technology

• Wider operating range
• Increased energy efficiency

As the motive jet accelerates the suction flow, a low-pressure

region is created at the entrance to the mixing chamber. As the

flow moves along the mixing chamber, pressure rises. At the

diffuser, velocity decreases and pressure rises.

Dimensions are for reference only and subject to change.

www.kadant.com Kadant is a global supplier of high-value, critical components and engineered systems used in process industries worldwide.

KADANT JOHNSON LLC Thermocompressor-3004 (US) 12/ 805 Wood Street Tel: +1 269-278-1715 Replaces all previous versions Three Rivers, MI 49093 USA Email: info@kadant.com © 2018 Kadant Johnson LLC

Size

A

ANSI 300#

B & C

ANSI 300#

D E F G H Units Approximate Weight

5.21 22.97 25.84 50.58 5.42 inches 140 lbs 132 583 656 1285 138 mm 64 kg

5.21 26.96 29.83 54.54 5.40 inches 150 lbs 132 685 758 1385 137 mm 68 kg

5.75 32.56 35.81 74.61 6.50 inches 240 lbs 146 827 910 1895 165 mm 109 kg

6.31 42.56 46.19 85.61 7.50 inches 285 lbs 160 1081 1173 2174 191 mm 129 kg

6.68 52.12 56.87 96.79 8.06 inches 340 lbs 170 1324 1444 2458 205 mm 154 kg

6.75 61.56 67.37 107.92 8.56 inches 480 lbs 171 1564 1711 2741 217 mm 218 kg

7.00 78.44 86.06 126.00 9.19 inches 780 lbs 178 1992 2186 3200 233 mm 354 kg

9.56 98.50 110.49 159.35 14.06 inches 1314 lbs 243 2502 2807 4048 357 mm 596 kg

11.44 98.50 112.88 166.63 14.06 inches 1414 lbs 291 2502 2867 4232 357 mm 643 kg

11.44 119.75 134.75 185.25 16.56 inches 1700 lbs 291 3042 3423 4705 421 mm 773 kg

11.44 133.00 147.69 198.19 19.06 inches 1800 lbs 291 3378 3751 5034 484 mm 818 kg

12.56 158.14 182.95 243.89 21.06 inches 2420 lbs 319 4017 4647 6195 535 mm 1100 kg

12.56 178.63 204.45 265.39 23.56 inches 2626 lbs 319 4537 5193 6741 598 mm 1194 kg

14.56 197.80 226.12 288.56 25.74 inches 3281 lbs 370 5024 5743 7329 654 mm 1491 kg

16.06 237.14 268.70 332.14 30.06 inches 4492 lbs 408 6023 6825 8436 764 mm 2042 kg

Dimensions shown are for standard design. High-efficiency thermocompressors are custom-engineered and dimensions provided above are for reference only. Dimensions are subject to change without notice.

E

G

F

H D

A

(Motive B inlet) (Suction inlet)

C (Discharge outlet)

Steam Jet

Thermocompressors