Post on 07-Jun-2022
R 500v3
Heat pump vacuum evaporator
with a scraped system and a heating jacket
exchanger
R 500v3
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1 Technical characteristics Nominal production of distillate with water: 500 [l/24h]
Models available: (selection dependent on corrosion resistance)
R 500v3 AA# (austenitic stainless steel) R 500v3 FF# (superduplex stainless steel) R 500v3 HH# (Nickel alloys)
Electrical equipment: R 500v3 ‐‐3 (400 [V] 50 [Hz] 3P) R 500v3 ‐‐4 (460 [V] 60 [Hz] 3P)
Construction: pre‐assembled single module on a stainless steel frame
Distillate heat exchanger: internal coil
Primary heat exchanger: heating jacket
Evaporation type: vacuum with a scraped system
Evaporation conditions: absolute pressure 6‐7 kPa temperature 30‐40 [°C]
Distillate temperature: 30‐40 [°C]
Drops separator: demister, grate type with packing elements
Technology of heating/cooling: heat pump
Heat pump compressor : reciprocating hermetic
Refrigeration fluid: R 134a (no impact on the ozone layer)
Cooling of refrigeration fluid: air cooled finned heat exchanger. Optional cold water auxiliary shell and tube heat exchanger
Vacuum system: liquid ejector
Control: automatic, continuous 24/24h 7/7 days by PLC possibility to make remote the functioning state signal starting and shutdown of machine
Operator panel: electronic keypad with digital display
Electrical cabinet rating: IP 54
Noise < 85 [dB(A)]
In compliance with standards: (CE marking)
Machinery Directive Electromagnetic compatibility Electrical safety PED Pressure machinery equipment
2 Nominal performance The data reported in the following table refer to the performances achieved during FAT (Factory Acceptance Test) with clean machine fed with tap water in standard atmospheric conditions. Model R 500v3 ‐‐3 R 500v3 ‐‐4
Electrical feed 400 [V] 50 [Hz] 3F 460 [V] 60 [Hz] 3F
Maximum production of distillate with water 525 [l/24h] ± 10% 575 [l/24h] ± 10%
Absorbed power in steady state working 5,5 [kW] ± 10% 7,5 [kW] ± 10%
Power factor [cosø] 0,9 [cosø] 0,9
Electrical specific consumption per litre of distillate 250 [Wh/l] ± 10% 315 [Wh/l] ± 10%
Produced heat 5,5 [kW] ± 10% 7,5 [kW] ± 10%
Maximum air flow of finned heat exchanger 4500 [Nm3/h] ± 10% 5300 [Nm3/h] ± 10%
R 500v3
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3 Functional description The machine R 500v3 is an evaporator for the treatment of water based liquids. It uses the combined effect of vacuum and heat pump technology to make water based liquids boil at low temperature (30‐40°C). For component identification refer to figure 1.
Figure 1
The numbers within a circle are the main sensors of the machine. The Roman numerals and the dashed lines indicate the optional components. The numbers near the inlet and the outlets indicate the connection to the process lines.
3.1 Process liquids The liquid to be treated is sucked into the boiling chamber D01 as a result of the vacuum created inside it by the vacuum system. The feed is controlled by the level sensor LS01 which controls the pneumatic valve VP01. The bottom of evaporation chamber consists of a heating jacket heat exchanger E01. Inside the boiling chamber there is the scraper, driven by an electric motor‐reducer M01. The scraper shape assures a good cleaning of the heat exchanger E01 walls and an efficient stirring. The refrigerating fluid, coming from the heat pump circuit, flows into the heat exchanger E01. The contact between the process liquid and the walls of the heating jacket leads to the boiling of the liquid itself. The vapour rises through the demister in order to damp the droplets. Vapour is condensed against the coil heat exchanger E03. The vacuum system extracts the condensed distillate together with any incondensable gases and sends them to the storage tank D02. The distillate is discharged by overflow, the non condensing gas are vented with the liquid. The concentrate is discharged through the valve V04 and by running of the membrane pump G02.
R 500v3
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3.2 Vacuum system The vacuum system consists of a centrifugal pump G01 coupled to the ejector S01. The ejector works on the Venturi principle and uses the distillate produced by evaporator as a motor fluid. The efficiency of the vacuum system depends on the temperature of the motor fluid. The opening of the valve EV03 breaks the vacuum inside the boiling chamber.
3.3 Heat pump circuit The heat necessary to boil the liquid and the cooling necessary to condense the steam are both supplied by the heat pump circuit. The refrigerating fluid, in the vapour phase, is compressed and heated by the compressor K01. It is then pumped through the primary heating jacket heat exchanger E01 and it releases part of its heat to the liquid. In this way, the refrigerating fluid cools and starts to condense. The air cooled finned heat exchanger E02 completes the condensation of the refrigerating fluid, any excess heat is released into the environment. The refrigerating fluid, now in the liquid phase, is sent to two expansion circuits. As a result of the pressure of the circuit, the refrigerating liquid reaches the lamination valves TCV01 and TCV02 that expand it. As a result of this expansion, the refrigerating fluid becomes cold and it is able to gain heat from the evaporated liquid. One circuit passes through the coil exchanger E03 in order to condense the vapour produced in the boiling chamber, while the other passes through the coil heat exchanger E04 located within the distillate tank, in order to preserve the efficiency of the vacuum system. The heat pump cycle is complete with the joint of the two expansion branches of the heat pump circuit and the suction of the refrigerating fluid, in the vapour phase, by the compressor.
3.4 Auxiliary liquids Auxiliary liquids are: Antifoam, supplied by the opening of the valves EV04 and EV05 if the optional system II is installed. Liquid agent for the adjustment of the distillate pH supplied in the vacuum pump suction line, if the optional system IV is installed. Tap water, for internal washing of the level controls of the evaporation chamber D01 and the sight glass, if the optional systems VI and VII are installed. Bactericide metering in the distillate discharge pipeline, if the optional system, VIII is installed. Auxiliary water cooling, by means of the exchanger E05 if the optional system IX is installed.
4 Current equipment (*1) Mark Description
I ‐ Arrangement for level control on the tanks of process liquids: improves the level of automation of the system.
II OM AF F Anti‐foam metering for liquids which produce foam during the treatment.
III OT DP C Concentrate transfer: installed when it is required to pump the concentrate to a remote location
*1) See the diagram in the figure 1.
R 500v3
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5 Options and Accessories on request (*1) Mark Description
IV OC PH D pH adjustment of distillate.
V OC CN D Distillate conductivity meter for an indirect measure of quality
VI OW TW Internal washing of the level switch in the evaporation chamber
VII OW MW Manual washing of the sight glass by means of a wiper
VIII AM BT D Bactericide metering: removes micro‐organisms in the distillate
IX OC TP R Auxiliary cooling: for high ambient temperature locations (*2)
X AT CP D Distillate transfer: installed when it is required to pump the distillate to a remote location
XI AS F 1000 AS D 1000 AS C 1000
Storage tanks for process liquids: required to enable continuous processing of waste liquids
[‐] OC EN Communication device with Ethernet module (*2)
[‐] OC PB Communication device with Profibus module *1) See the diagram in the figure 1. *2) To be requested in the order.
6 Construction materials INOX 304/L Austenitic stainless steel AISI 304 (EN 1.4301) /AISI 304L (EN
1.4306) Cu Copper
INOX 316/L Austenitic stainless steel AISI 316 (EN 1.4436) / AISI 316L (EN 1.4404)
Al Aluminium
DUPLEX Superduplex stainless steel UNS S32750/UNS S32760 (EN 1.4410/EN 1.4501)
ALLOY C22 Nickel alloy UNS N06022
PP Polypropylene Component ID R 500v3 AA# R 500v3 FF# R 500v3 HH#
Lower wall of evaporation chamber D01 INOX 316/L DUPLEX ALLOY C22
Dome of evaporation chamber D01 INOX 316/L INOX 316/L INOX 316/L
Distillate storage tank D02 INOX 316/L INOX 316/L INOX 316/L
Jacket heat exchanger E01 INOX 316/L INOX 316/L INOX 316/L
Coil heat exchanger E03/04 INOX 316/L INOX 316/L INOX 316/L
Shell and tube exchanger E05 Cu Cu Cu
Finned air cooled heat exchanger E02 Cu/Al Cu/Al Cu/Al
Vacuum pump G01 INOX 316/L INOX 316/L INOX 316/L
Liquid type ejector S01 PP PP PP
Structure and frame ‐ INOX 304/L INOX 304/L INOX 304/L
Piping and line parts ‐ INOX 316/L + PP DUPLEX + PP ALLOY C22 + PP
Heat pump piping ‐ Cu Cu Cu
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7 Dimensions and clearance zones
[mm] [inch.]
a 1540 60,6
b 1160 45,7
c 500 19,7
d 1000 39,4
e 600 23,6
f 1000 39,4
g 850 33,5
h 310 12,2
i 3040 119,7
j 2760 108,7
k 1340 52,7
l 2200 86,6
m 1600 63
Figure 2
8 Dimensions, weight, packaging, storage and handling Type Dimensions [mm] Weight [Kg]
Empty without packaging/steady state with water 1600 x 1340 x 2200 h 580 / 700
Standard packaging (pallet + nylon) 1600 x 1400 x 2300 h 590
Packaging with wooden crate (also with protection bag) 1800 x 1570 x 2400 h 830 If the equipment has to be stored for a prolonged period before the installation it must be kept in the delivery condition, indoor, in a clean, dry area within a temperature range of +5 and +35°C. The evaporator may be handled by pallet truck or lift truck with >1400 mm long forks. Movement with crane requires a sling and load balancer.
9 Working temperature, ventilation and auxiliary cooling The finned heat exchanger of the heat pump system produces warm air which should be evacuated to avoid overheating of the installation site. For this reason it is necessary to provide a suitable ventilation system in order to ensure sufficient air exchange. Such system could be a simple opening to the external ambient, as shown in Figure 2, or suitable conveying or forced ventilation systems. If there isn’t a fit opening in the wall, it is necessary to let a distance of 0,8 m opposite the finned block for guarantee a sufficient air exchange Temp. Working conditions
10÷40 [°C] Normal conditions
0÷10 [°C] Start up allowed only with precautions
40÷45 [°C] It is compulsory to use the optional accessory of auxiliary cooling
>45 [°C] Contact VWS Italia The nominal performances stated in this document are guaranteed with a feed temperature lower than +55°C.
R 500v3
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The optional auxiliary cooling system has an output thermal capacity of 4 kW (3500 Kcal/h). The pressure drop produced by the system is ~150 kPa. The maximum inlet pressure of cooling water is 300 kPa. The outlet temperature of water is ~40°C. Mains water must be without solvents and/or corrosive substance for preserving the machine components; the use of the distillate is only allowed against permission of the constructor. Using mains water at 15°C the flow rate of cold water required is ~0,14 m3/h. Using cooling tower water at 28°C the flow rate of cold water required is ~0,29 m3/h.
10 Installation requirements The machine has to be installed in a level position in a location that can support the weights listed in section 7. A maintenance and air flow perimeter around the evaporator is required as indicated in section 6. The features of the liquid connections and pipes are hereafter listed. (*1) Description Type ED [mm] (*2) [m] (*3) [m] (*4) [wcm]
1 Liquid to be treated Hose‐adapter 20 10 15 ‐ 6
2 Concentrate discharge Hose‐adapter 32 5 10 ~20
3 Distillate discharge Hose‐adapter 20 5 10 ~3 *1) See Figure 1 *2) Maximum distance of the tank. *3) Maximum pipe length. *4) Difference in height / Maximum head.
The machine requires compressed air, dehydrated and without oils, to operate the pneumatic valves. The inlet connection to the pneumatic equipment is 1/4“G. The supply pressure needs to be 800 kPa and the line should be capable of supplying 10 Nm3/h. The machine is planned to work indoors. The electric connection is accomplished with the supplied cable. It has to be connected to a switch suitably designed by a qualified technician, following the good working regulation and respecting the electric cabinet rating. The nominal total current is 20 A; this value has to be used for cables dimensioning and for upstream protection system of the machine.
11 Environmental Impact Reduction: CO2 emissions Below are the results of our Carbon Footprint study and a comparison with an extreme case of pollution:
kgCO2eq/m3 liquid waste treated 150,94
Percentage of emissions avoided with respect to incineration of the liquid waste ‐88,0%
The first data value represents an average between the various industrial uses considering a use of the machine 24h/d, 330 d/y, for 10 years, road transport of the machinery to 1000 km from production site of the manufacturer and road transport of the chemical products for a distance of 100 km from the customer’s site. The data of the comparison with incineration was weighted on the yield of the machine, i.e., the ratio between the initial liquid waste to be treated and the residual concentrate to be disposed of.
Notes ‐ For details concerning the safety and the installation of the machine refer to the use and maintenance manual. ‐ The data in this document are indicative. Cherith Water reserves the right to change any data without prior notice. The front‐page photograph is neither representative of all versions nor models.