Hydrogen Sulfide / ATEX-Compliant / Hastelloy C / Rotory Lobe Pumps
A leading provider of catalysts for oil refineries and
petrochemical processing companies needs hydrogen sulfide for the
treatment of various catalysts. The customer sought pumps for the
plant for producing hydrogen sulfide which are suitable for feeding
and circulating the product in the plant.
Following a prolonged test phase and many conversations with
various pump manufacturers, the customer opted for three Accuvon
rotary lobe pumps. The pumps have an ATEX-compliant design.
It was necessary to manufacture the pump casing and the rotors from
Hastelloy due to the aggressive pumped medium. Three pumps are
installed on top of each other with minimum space requirements in
order to maintain the pump without having to stop the production
process. One pump is used as a reserve pump.
It was important for the customer to install an overpressure
protection into the plant to guarantee high process reliability.
The customer opted for the Accuvon relief valve. The relief valve
is installed on the pump instead of the standard pump cover. If the
working pressure in the pump chamber exceeds the predefined
pressure, the relief valve opens and the pumped medium can flow
back within the pump chamber. This equalizes the pressure. If the
pressure in the pump chamber decreases, the If the pressure in the
pump chamber decreases closes.
Application data:
| Medium | Corrosive components: H2SO4, NaHS max. 40%, H2S, sulfur, sulfides,
NaHSO4 Solids: Sulfides, sulfur, dissolved Na2SO4 (20 m%) Gas content: 8% |
| Flow Rate | 20 m³/h |
| Pump Speed | approx. 600 rpm |
| pH value | Acidic to strongly acidic |
| Temperature | 70 - 90°C |
| Pressure | 1.4 bar |
| Solids Content | 20 % |
Technical data::
| Casing | Hastelloy C 2000 |
| Casing protection plate | Hastelloy C 2000 |
| Static O-rings | FFKM |
| Shaft seal | mechanical seal SISIC/SISIC |
| Rotors | tri-lobe screw profile , Hastelloy C 2000 |
| Drive | Helical geared motor, Ex II 2G EExde IIC T4 |
Advantages of this Accuvon AC 75
- ATEX-compliant design
- Monitored by temperature sensor
- relief valve as overpressure protection
- Short-term dry-run capability
- Pumping highly viscous media
- Ease of maintenance
Similar application of sewage treatment:
Accuvon provides many applications on-board ships and in other
areas of the marine industries - from handling of both fresh and
seawaters to fuels of all kinds, oil or oil sludge, bilge or other
water-oil mixtures, fish or fish waste, sewage or other fluids with
or without solids, of low or high viscosities.
Sewage | Ballast Water | Bilge / Loading | Oil Sludge | Fuel /
Crude Oil | Oil-Water Separation | Fish / Kitchen Waste | Mud |
Emulsions | Oilfield Chemicals | Marine Diesel Oil | as Skimmer
Pump
Features of Accuvon Rotary Lobe Pumps:
1.Self-priming, Valve-less, Positive Displacement Pump
2. Easy Maintenance through Front Cover
3. Controllable Flow, Ratio up to 1 : 5
4. Capacity of up to 3200 m³/h
5.Pressures of up to 25 bar
6. Dry-running Capability
7.Reversibility, same pump output for both directions
8. Gentle, Low-Pulsation Pumping
9.For Viscous, Solid, Abrasive or Shea-sensitive Mediums
10. Low Parts Replacement Costs
Components of a Accuvon Rotary Lobe Pump
1 Timing gear
2 Quench and control chamber
3 Casing in block design
4 Unwetted shaft
5 Axial and radial casing protection
6 Shaft seal
7 Rotors
8 Quick-release cover
