BÜCHI Mini Spray Dryer B-191 Contents
Contents
1 Scope of delivery 2
2 Safety 3
3 Function 6
4 Putting into operation 7
4.1 Set up location 7
4.2 Installation of the compressed air treatment plant 7
4.3 Installation of glass parts 8
4.4 Installation of the product feed hose 8
4.5 Installation of the spray nozzle 9
4.6 Installation of the intake filter 9
4.7 Installation of the aspirator filter 10
4.8 Installation of the compressed air 10
4.9 Installation of the automatic nozzle cleaner 11
4.10 Installation of the pneumatic action cylinder on
the nozzle 12
4.11 Installation check 12
Read these instructions thoroughly before you use the BÜCHI
Mini Spray Dryer B-191. Store these instructions in the immediate vicinity of the apparatus so that they may be consulted
at any time.
Chapter 2 contains important safety information. Knowledge of
this is imperative for the safe operation of the Mini Spray Dryer.
Subject to technical change without notice. No part of these
instructions may be reproduced in any form whatsoever or
processed, reproduced or disseminated by means of electronic
or optical systems without the express written permission of
Büchi Labortechnik AG. All rights reserved.
Copyright © Büchi Labortechnik AG 1997
5 Operation 13
5.1 Layout of the operating and display elements 13
5.2 Spray process 14
5.3 End of spray process 15
5.4 Fault elimination 16
6 Maintenance 18
6.1 Cleaning 18
6.2 Customer service 18
6.3 Block diagram 19
7 Taking out of operation 20
7.1 Storage 20
7.2 Packing/transport 20
7.3 Disposal 20
8 Replacement parts 21
8.1 Replacement parts, basic apparatus 21
8.2 Replacement parts, glass assembly, white 22
8.2 Replacement parts, glass assembly, brown 22
8.3 Replacement parts, spray nozzle 23
8.4 Replacement parts, pneumatic nozzle cleaner 23
8.5 Replacement parts, intake filter 24
8.6 Replacement parts, aspiration filter 24
8.7 Accessories 25
9 Appendix 26
9.1 Technical data 26
9.2 Materials used 26
9.3 EC declaration of conformity 27
en, Version A (28 pages) Order No.
B-191 Instructions 96532
1
1 Scope of delivery BÜCHI Mini Spray Dryer B-191
1 Scope of delivery
230 V/50 Hz 220 V/60 Hz
Order No.
1 Mini Spray Dryer with
manual nozzle cleaner 27612 27893
1 Mini Spray Dryer with
automatic nozzle cleaner 27903 27904
1 Mini Spray Dryer System 27920 27921
Enclosed parts:
1 Instructions:
German 96531
English 96532
French 96533
Italian 96534
Spanish 96535
1 CE declaration B-191 97679
1 Electrostatic arrester cable 27894
1 Key 04338
5 m “Nyflex” PVC hose D14/8 mm 04113
5 m Neoprene hose 04129
3,7 m Ventilation hose 44 mm 16236
2 Clamp 8/10-16 22352
1 Allen wrench 03776
1 ICO compressed air quick connector 04155
1 Nipple (screw) 1/4” 8 mm 04156
Figure 1: Mini Spray Dryer B-191
Table 1: Enclosed parts
Optional accessories:
1 Glass set in brown glass 27909
1 Magnetic stirrer 27940
1 Aspirator filter 16482
1 Automatic nozzle cleaner 27905
1 Drying air intake filter 11235
1 Completely automatic compressed air 27907
plant, compressor
1 Wilkerson maintenance unit for 04366
compressed air
1 Protection shield 27725
1 Filter sacks (6 units) 35004
Table 2: Optional accessories
2
BÜCHI Mini Spray Dryer B-191 2 Safety
2 Safety
The apparatus has been built in accordance with state-of-the
art technology and recognized safety regulations.
Nonetheless risks and dangers can arise from the apparatus:
• If the apparatus is operated by insufficiently trained personnel.
• If the apparatus is not used as directed.
2.1 Symbols
Stop
Information on dangers which can lead to serious damage to
property, to severe or life-threatening injuries.
Warning
Information on dangers which can lead to damage to health
or property.
Please note
Information on technical requirements. Noncompliance can
lead to faults, inefficiency and production losses.
2.2 Requirements for the operator
The Mini Spray Dryer B-191 is only to be used by laboratory
and specialist personnel and other persons, who, because of
their training or professional experience, are able to assess
the dangers which can result while operating the equipment.
Personnel without this training or persons who are in training
require thorough instruction. These operating instructions are
the basis.
2.3 Regulation use
The Mini Spray Dryer B-191 is conceived and built as a piece
of laboratory equipment. Its regulation use is to dry watery
solutions or suspensions in one operating process.
It is used for:
• Spray drying watery solutions or suspensions
• Micronisation
• Spray embedding and coating
• Structural transformation
Regulation use of the Mini Spray Dryer B-191 also includes its
care and careful handling of the apparatus on the basis of the
directions in these instructions.
3
2 Safety BÜCHI Mini Spray Dryer B-191
2.4 Non-regulation use
Any uses other than those listed as well as any use which
does not correspond to the technical data is a misuse. The
operator bears sole risk for eventual damage related to such
use.
This laboratory apparatus is not suitable for operation in explosion-prone areas.
In particular the following uses are not allowed:
• Spray drying of organic solvents
• Processing of explosive substances
2.5 Fundamental dangers
Fundamental dangers arise from:
• Equipment which shows visible damage
• Extended storage in unfavorable conditions
• Mixtures of unknown composition or with impurities
• Damaged glassware
• Hot surfaces
• Folded hoses
• Inflammable gases or vapors in the immediate vicinity of
the apparatus
• Powdering, poisonous products while emptying the product
vessel
2.6 Safety measures
Regional and local laws and regulations must be observed.
In order to arrest electrostatic charges away from the Mini
Spray Dryer, the device is internally grounded. There is also
the possibility of arresting electrostatic charges away from
both the sample receiving vessel and the cyclone.
Operation of the Mini Spray Dryer should only occur with protection shield.
The wearing of personal safety equipment such as safety glasses, protective clothing is necessary.
The glass parts are to be visually checked regularly for possible
damage, stars, cracks.
The earthed conductor (protective conductor) should never
be disconnected. Otherwise their is the danger of electrical
shock.
4
BÜCHI Mini Spray Dryer B-191 2 Safety
The operator is responsible for the instruction of his or her personnel. For this purpose these instructions can also be ordered
in other languages (see Chapter 1, Scope of delivery). These
instructions, as a component of the Mini Spray Dryer B-191,
should be available to the operating personnel at any time at
the location of use of the apparatus.
The operator is to inform the manufacturer immediately of all
safety-related incidents which occur during use of the product.
Modifications
Modifications are only allowed after consultation and written
permission from the manufacturer.
Only glass parts recommended by the manufacturer may be
used.
Only the specified parts of the Mini Spray Dryer meant for
functional performance may be installed and removed. This is
possible manually or with the supplied tool. The removal of
protective fixtures and covers with the aid of the usual tools
is forbidden, except by authorized repair and maintenance
personnel.
2.7 Safety elements
Heating:
• Excess temperature protection against uncontrolled overheating
• Automatic temperature control
Air:
• Negative pressure suction procedure
The suction procedure used in the Mini Spray Dryer B-191
produces a light negative pressure in the apparatus and
thus rules out, together with the intake filter and aspirator
filter, a contamination of the environment through leaking
from the apparatus.
Glass:
• Use of inert 3.3 borosilicate glass
• Electrically-conducting internal coating of the cyclone
• Screwable glass connections to prevent broken glass
5
3 Function BÜCHI Mini Spray Dryer B-191
3 Function
The Mini Spray Dryer B-191 functions according to the parallel flow principle. This means that the sprayed product and
the drying air flow in the same direction.
3.1 Functional principle of the drying air
햲 Suction opening
햳 Heating
햷
햳
햴
햲
햸
햴 Flow stabilized inlet to the drying chamber
햵 Cyclone, the product is separated from the air current
here
햶 Aspirator
햷 Temperature probe air inlet
햸 Temperature probe air outlet
햹 Collecting vessel for the finished product
햵
Figure 2: Functioning principle of the drying air
햷
햵
햶
햴
햹
햳
햶
3.2 Functioning principle of product flow and the
spray nozzle
햲 Solution, emulsion or dispersion
햳 Peristalsis feed pump
햴 Product channel
햵 Connection for compressed air or inert gas
햶 Connection for cooling water
햷 Cleaning needle with swirl channel
The cleaning needle serves to push through the nozzle in
the case of eventual blockage by the product.
햲
Figure 3: Functioning principle of product flow and the spray nozzle
6
BÜCHI Mini Spray Dryer B-191 4 Putting into operation
4 Putting into operation
Check that the voltage of the socket is the same as that
given on the apparatus plate.
The apparatus is supplied with an attached cable but without
a plug. The apparatus should be connected by an electrician
in accordance with local regulations.
4.1 Set up location
The apparatus must stand on a stable, horizontal base. It is
not to be used in explosion-proof rooms.
The dimensions of the Mini Spray Dryer are
Width: 50 cm
Depth: 60 cm
Height: 100 cm
Weight: 57 kg
Operating temperature: 5 – 40° C
햴
Figure 4: Functioning principle, air treatment plant
햳햲
4.2 Installation of the compressed air treatment
plant
In order that the Mini Spray Dryer achieves an optimal atomization performance, the supply of compressed air with a pressure
of 5-8 bar is necessary. The compressed air must be dried
and free from impurities (contamination of the product through
impure air). If there is no air treatment plant available, we
recommend the use of a WILKERSON maintenance unit
(see Figure 4), consisting of:
햲 Water separator
햳 Filter
햴 Activated charcoal filter
If there is no compressed air plant available, the compressed
air can be taken from compressed air bottles or produced
with an oil-free air compressor with an output of 5-8 bar as
required (see Chapter 1, Optional accessories). In the case of
compressed-air bottles care should be taken that they contain
compressed air exclusively and no inflammable gases.
Because of the variety of coupling types for compressed-air
bottles, we supply only the apparatus-side couplings (Order
code 04366).
7
4 Putting into operation BÜCHI Mini Spray Dryer B-191
햴
햳
햲
햶
햵
햸
햷
Figure 5a: Glass assembly
햶
햹햺
Figure 5b: Coupling part, complete
4.3 Installation of glass parts
Care is to be taken that only glassware in perfect condition is
used, which shows no cracks, stars or other damage. The
glassware is to be checked visually before the initial putting
into operation of the apparatus.
The glass parts are already mounted on the apparatus in the
packaging.
1. The spray cylinder 햲 is held in position by means of the
sprung clamping device 햳.
2. Care is always to be taken that the rubber gasket 햴 is fitted correctly during the installation of the cylinder.
3. The temperature probe PT-100 햵 must be inserted in the
opening provided in the coupling 햶.
4. The support 햷 must be pushed upwards in such a way
that the complete spray cylinder rests on top. The screw
joint for fixing the support in position should be lightly tightened by hand.
5. The separator 햸 is bolted down to the bottom end of the
spray cylinder with an SVL 42 screw cap.
6. The cyclone must be screwed onto the coupling with a
flange screw joint.
7. The glass elbow, which is attached manually, is located
on the cyclone.
8. The product receiving vessel is fastened on the bottom
end of the cyclone. The anchor clamps provided are sufficient as mounting.
9. The earthing cable must be installed in the socket connector
provided on the cover of the product receiving vessel and
connected to the housing.
10. When assembling the coupling part, the teflon piece 햹 is
inserted with the rectangular shoulder and the fitted contact
ring 햺 first. The slanting shoulder is connected to the spray
cylinder. The centering bolt is supplied in order to fit the
flanged nut tight.
Figure 6: Product feed hose and peristalsis pump
8
4.4 Installation of the product feed hose
1. In or to be able to install the product feed hose, the rollers
of the hose compression pump (peristalsis pump) must be
raised from the working surface. This is possible by opening
the holding device with the tilting lever.
2. The product feed hose (silicon hose 4x2 mm) is now pulled
through the holder until the nipple integrated in the hose is
at the opening.
3. The hose is now laid between the rollers and the working
surface without tautening.
4. The working area is pressed to the rollers by lifting the
orange tilting lever.
5. The observation window must now be installed in front of
the pump for the safety of the operator.
6. The pump bed (working area) should be lowered by operational interruption and stoppages in order to protect the
hose.
BÜCHI Mini Spray Dryer B-191 4 Putting into operation
4.5 Installation of the spray nozzle
햵
1. Insert the spray nozzle 햲 in the opening provided in the
햳
heating oven and connect product feed hose 햳.
2. Then close housing cover 햴 in order to continue further
햴
installation.
3. Screw the compressed air tube 햵 on the nozzle.
햲
4. In order to reduce warming of the product in the nozzle,
cooling water (tube diameter 5 x 3 mm) can be connected
to the nozzle. Care must be given that the cooling water
inlet is labeled with “E” and the outlet with “A”. Only when
connected in this manner can optimal cooling of the product be guaranteed.
Figure 7: Nozzle and product feed hose
햵
햲
햴
Figure 8: Intake filter
4.6 Installation of the intake filter
The intake filter consists of a tube 햲, a housing 햳 and a filter
element 햴 which filters fine dust particles from the aspirated
air and thus prevents a contamination of the sprayed product
with particles from the air. The flexible connecting tube makes
possible an optimal placement of the filter and is connected
to the air suction supports 햵 of the B-191. The tube can be
secured with the supplied clamp.
햳
9
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