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Solvent Recovery:
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In-house solvent recovery is productive solution to the increasing problems of toxic waste disposal. The substantial savings that can be made on the purchase of new solvent and from reduced disposal costs, would make it economical to recover quantities of 50 litres per week and upwards of waste solvent. The solvent recovery units use distillation to give a high quality recovered solvent for re-use. |
| The NSC Range of Solvent Recovery Units is available as either batch, or automatically filled models. On a batch basis, disposable liners can be used, so there is no cleaning out to be done. When automatically filled, they will fill, and then top-up as the recovery proceeds. This is especially relevant to lightly contaminated solvents, when the units can run for long periods before needing to be cleaned. |
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| The CR Range of Solvent Recovery machines are fully automatic, self-cleaning units, PLC controlled and capable of continuous operation. They can also process heavily contaminated solvent on a continuous basis. |
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NSC Series
Any Industry using solvents can recover liquid waste solvent in-house and increase profitability by reducing solvent purchases and eliminating or minimising waste disposal costs. From the electronics to the GRP industries, from degreasing solvents to gunwash, solvent recovery is the simple way forward. |
| The NSC series of electrically heated recovery units are available in many different capacities to insure that the user will recover their costs in a matter of months. Volumes of waste as little as 50 litres a week are economic to recover.
For most sizes, disposable liners, or drums, can be used to contain residues and avoid the need for cleaning. This reduces labour content to a few minutes per day. The units are simple to operate - a 'one Button' operation.
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| Where large volumes of waste are generated, automatic filling is used. Level controls monitor the levels of solvent inside the recovery unit and control a pump to top up the unit as recovery proceeds. Recovery units can therefore feed from bulk storage, or can run in-line with washing or degreasing plants. |
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Vacuum assistance is available for recovery of high-boiling point solvent containing temperature sensitive residues, such as nitro-cellulose resins. |
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The recovery process is by distillation using a thermostically controlled electrically heated oil-jacket, and a water-cooled condenser. Distillation results in a high purity product. The heaters are flameproof ExD 1, and all thermostats and controls are on intrinsically safe circuits (BASEEFA/CENELEC approved).
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TECHNICAL DATA |
NSC 25 |
NSC 50 |
NSC 110 |
NSC 210 |
NSC 500 |
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Vessel Capacity |
25L |
50L |
100L |
200L |
500L |
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Recovery Rate (Max) |
15L/H |
20 L/H |
40 L/H |
80 L/H |
150 L/H |
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Typical Rate (20% Solids) |
8 L/H |
20 L/H |
30 L/H |
60 L/H |
120 L/H |
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Power Consumption |
3 Kw |
4.5 Kw |
9 Kw |
18 Kw |
36 Kw |
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Typical Water Consumption |
4L/Min |
6L/Min |
8L/Min |
15L/Min |
30L/Min |
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Installation Area |
0.65m Sq x 1.0m High |
0.75m Sq x 1.2m High |
1.0m Sq x 1.6m High |
1.5m Sq x 1.6m High |
1.7m Sq x 2.0m High |
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Weight |
70Kg |
100Kg |
300Kg |
400Kg |
800Kg |
CR Series
The CR Series of solvent Recovery Units is a specially developed, fully automatic range of vacuum assisted distillation units, capable of continuous, virtually unattended, operation. They will provide users with the following benefits:
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Automatic Filling
Level switches monitor the solvent level inside the machine, controlling valves on the solvent inlet, to allow the vacuum to draw in solvent, and maintain the working level during distillation.
Normally the unit will operate for several hours without draining. Then the PLC controls will stop the automatic filling and switch the unit into a concentration cycle. It will continue to recover solvent from the chamber but without topping up the level, until the residual sludge is very thick.
At the end of this period, the unit will go into the drain sequence, and then automatically re-fill. Recovery will re-commence in a few minutes, all without the need for the intervention of an operator.
A fibre-optic sensor, monitoring the vapour cleanliness ensures the quality of the recovered solvent. Should, for example, droplets of circulated solvent become entrained in the vapour, the automatic filling is stopped to allow the problem to clear.
Self-Cleaning
The highly polished surface of the cylindrical distillation chamber is swept clean by the self-adjusting brass scraper blades. This maximises heat transfer efficiency.
At the end of a cycle, the drain valve, of the same diameter as the chamber, is opened, and the blades automatically discharge the residues. The valve then re-closes, and the chamber is refilled with solvent.
Recovery recommences within a few minutes. There is a minimal loss of process time from draining and re-filling, and no operator involvement. The high efficiency of the heat transfer allows the recovery unit to process heavily contaminated solvents, such as waste products, which would not normally be recoverable. |
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Safety
The flexibility of the PLC controls allows the highest levels of safety interlocks to be used. These include: Heater Temperature and Over Temperature; Residue Temperature; Water Flow; Condensate Temperature; Vapour Temperature; and Degree of Vacuum. Also supplied, as options, are an extraction fan with duct around the drain valve - with an interlocked gate, and an interlock to prevent draining unless there is a container present underneath the drain valve. When processing temperature-sensitive materials are used, such as inks containing Nirto-Cellulose , automatic injection of a plasticiser can be included, along with nitrogen purging the drain sequence.
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TECHNICAL DATA |
CR-30 |
CR-60 |
CR-90 |
CR-180 |
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Recovery Rate (L/Hour) |
30-40 |
60-80 |
90-120 |
180-240 |
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Heating Capacity (KW) |
9 |
18 |
30 |
60 |
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Water Flow (m cubed/Hour) |
0.6 |
1 |
2 |
4 |
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Length (m) |
1.5 |
1.5 |
1.6 |
1.6 |
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Width (m) |
1.5 |
1.5 |
1.6 |
1.6 |
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Height (m) |
2.5 |
3.4 |
4.0 |
4.5 |
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Weight (Kg) |
800 |
1200 |
1500 |
2500 | |
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