skip to main content

Riley Surface World uses cookies to give you the best experience on our website. If you continue we assume that you consent to receive cookies on our website. Read More

X
Machines & equipment for sale

Chemical Process Solutions Limited Nitric Acid Fume Scrubber

Direct From Site Clearance

Direct Site Clearance Price [?]
£ Login or Register for price
Part of a Direct Site Clearance
Orthopaedic Quality Surface Finishing
Condition
From a working environment, Excellent Condition, Current Model
Buy Now Add to Quote Book Appointment
Stock No
SAN500
Manufacturer
Chemical Process Solutions Limited
Model
Nitric Acid Fume Scrubber
Year of Manufacture
2020
Serial
JN7021
Condition
From a working environment, Excellent Condition, Current Model
Approx Duty CFM / M³/Hr
1295 // 2200 @ 1M/Sec
Filter Area ft² / m²
3M Packing Depth
Other Info
Variable Speed @ 30Hz = 1100M3/Hr
Location
Our Central Warehouse, Aldridge, UK
External Dimensions (WxDxH mm) [?]
3140 x 3900 x 6900
Delivery
Your delivery options

Description

Chemical Process Ltd. Nitric Acid Fume Scrubber.

System Operation

  • A common start icon on the HMI starts the system. Touching the Start icon will initially start the duty recirculation pump (P101 or P102). Duty pump is selected on HMI. The pump starts and the switch on the variable area flow meter is made. At this point the extraction fan CF101 starts. If the contact is not made on the flow meter then the system alarms and the fan does not start.
  • Once the system is running then any loss in recirculation flow will automatically switch from duty to standby pump and give an alarm at the panel. If both pumps fail then the fan remains running to ensure that fume is still extracted from the process lines.
  • There are 2 sets of buoyancy level switches in the scrubber base tank.= 
  • Set 1 gives LLL level and HHH level. LLL level should alarm and switch off the duty pump but override any auto pump changeover on low flow. HHH level gives a visual and audible alarm for base tank high level.
  • The second level switch will maintain the water level in the base tank. LL level will open valve AV101 to fill the base tank and HH level will close AV101. AV101 is a pneumatically actuated fail safe close valve with switch box (mechanical contacts) Open and closed contacts are wired back to the panel. Failure of the valve to open or close on HH or LL should give an alarm on the HMI.
  • Periodically a small amount of the liquid in the base tank is ‘bled’ to drain to minimise solids build up. AV102 is operated on a user settable timer set on the HMI. The HMI should have an ‘off’ time in hours and an ‘on time’ in seconds. Typically the system is set to open for say 10 – 20 seconds every 8 hours but this needs to be checked and set during commissioning.   
  • The scrubbing liquor is dosed with sodium hydroxide from a 25 litre carboy. A drum lance is supplied for the drum which has an integral buoyancy level switch to indicate drum low level. Drum low level should give an alarm on the HMI.
  • A PH probe is installed in the recirculation pipework controlled though a pH controller. A dosing pump transfers sodium hydroxide to the scrubber on low PH.

  • Typically we would replicate the 4 – 20ma pH reading from the controller through the PLC and then use this to allow the operator to set dosing points and dosing times. The dosing pump is set up in ‘pause mode’ and on demand a signal is sent back to the pump to start and stop.

  • It is possible to set up the PH controller and dosing pump to operate independently but the preferred option is through the PLC and HMI.
  •  The system is set through a set up screen. A low PH value is set to start the dosing pump and a dosing ‘on time’ and ‘off time’ set on the screen. At low PH the dosing pump starts and runs for the ‘on time’. The pump will then pause for the duration of the ‘off time’ to allow the solution to mix. Once the ‘off time’ period is timed out the PH signal is read and if the PH is still below the set point then the dosing sequence is repeated. A set point for base tank ‘high’ and ‘low’ PH should be included on the HMI. These set points will give alarm indication for either failure of the dosing system or overdosing of sodium hydroxide.

Additional information to the above is available on request.

This has been regularly serviced since the unit was installed, Includes everything from scrubber inlet, to fan outlet along with control panel, fan and all ancillaries.   

This used nitric acid fume scrubber was manufactured and installed in 2020 extracting a Kerry cleaning line for prosthetics.

Designed and set to run at 2200M³/Hr with variable speed fan, the sump tank containing a neutralising solution.

This nitric acid fume scrubber comprises of:

Fan details

  • 0.77M²/sec @ 1650Pa
  • Colasit : Direct drive CMV eco 250
  • 2800 rev/min

Performance

  • Flow rate set to 1100M³/Hr at 30Hz on the frequency invertor.
  • Fan pressure drop 52mm

Pump Details (Main pump and Stand by pump)

  • Duty 11M³/Hr @ 2Bar g
  • Make Schmitt : Direct drive, T190 PP ET 600
  • 2.2kW
  • 2900 rev/min

Column Details

  • Diameter 1200mm.
  • Single Stage
  • Static packing height = 3M
  • Liquid flow rate 11M³/Hr
  • Designed gas flow 2400M³/Hr

Tank Details

  • Size 2800 x 1400 x 1200mm
  • Volume 4.5M³

Dosing Pump

  • 200Litres/Hr @4Bar g
  • Grunfoss DDA 200-4AR-PVC
  • 62 W.

 

It is clean & in very good condition, fully functional & still operational until April 2025.

This unit has been serviced 3 x per year and any work needed doing has been done to the highest standard.

If this were new it would be approx. 50-60k for the scrubber, fan, extra tank and control panel.

Footprint: 3140 x 3900 x 6900mm

 Electrical details and layout drawings are available on request.

pdf icon Print / Download Chemical Process Solutions Limited Nitric Acid Fume Scrubber Datasheet

Photographs taken prior refurbishment. Our refurbishment service is not available on all machines.