Media filters Disk Filters Centrifugal separators Bag … filters... · Media filters. Disk...
Transcript of Media filters Disk Filters Centrifugal separators Bag … filters... · Media filters. Disk...
Media filtersDisk FiltersCentrifugal separatorsBag filtersCartridge filtersSweeper jets
PEP Products
Media FiltersMedia Filters
How It Works
Sand Media Filtration
SMF
HMF
BMF
SMF HMF BMF…Filter Selection
SMF2-FG Media Filter
SMF2-FG (non metallic)
Flow rates from 43 to 251 GPM
Single or multiple vessel design
NEMA 4X control panel
Patent pending universal face pipe design
Stainless steel base
Metal pumps – longer life
Oversized actuator, 600 in- lb torque
HMF2 Media Filters
Two Models:•Stainless steel – 100 PSI
•Carbon steel – 150 to 300 PSI
Flow rates from 17 to 251 GPM
Patent pending universal face pipe design
Metal Pumps
NEMA 4X control panel
Fusion bonded exterior coating
Stainless steel base
Oversized actuator, 600 in-lb torque
NSF approved fusion bonded interior coating
Dual Source Module
THREE MODES OF OPERATION
Manual Mode: Allows selecting between tower/system water and city water at the flip of a switch. (Tower water is preferred during peak summer demand and city water during winter/spring/fall or at initial start-up for conserving water and water treatment chemicals.)
Remote Mode: Allows backwash water source selection via remote input from BMS.
Water/Chemical Conservation Mode: Water treatment chemical usage is optimized by allowing a conductivity meter to determine backwash water source. If system water conductivity is low, city water is utilized. If conductivity is high, instead of bleeding water to drain, it is used to backwash the filter.
BMF Media Filters
50 psi (standard), 100 & 150
Carbon or stainless steel construction
Metal or non metallic face piping
Flow rates to 1000 GPM per vessel
Dual and multiple vessel configurations
BMF Media Filter Cut-Away
High Performance Media Filter
IMF Filter in Forward Flow
IMF in Backwash
Radial bed fluidizers lift media for rigorous backwash
Flush bottom annular V-notch under-drain eliminates stagnant water
IMF Filter
CL (Closed Loop) Media Filter
Closed loop applications
Dual electric actuators
150 and 300 PSI rating
Carbon or stainless steel
Portable (on wheels)
Centrifugal Centrifugal SeparatorsSeparators
Centrifugal Separators
How They Work
Flow rate to 5,000 GPM
Carbon Steel or Stainless
Auto Purge
No moving parts
Particle removal down to 74 microns
Complete custom skids
Tower Clean Systems
ICS Tower Clean System
Bag FiltersBag Filters
BGFS (Bag Filters)
How They Work
BGFS Filter
Carbon or stainless steel
Flow rates to 2000 GPM
Single or multi housing skids
Auto housing change over
Cartridge Cartridge FiltersFilters
SCF Cartridge Filter
Carbon or stainless steel
Flow rates to 525 GPM
Single or multiple vessel systems
Custom skids
Sweeper JetsSweeper Jets
ISJ Series Sweeper Jets
Flow Rate: 1 gpm* / ft2 of tower basin area (*flow rate into jet nozzle)
Jet Spacing: ~10” between jets
Note: Sweeper jet flow rate values are at 10 psig
Old Jet vs. New Jet
Typical Side Stream Installation
Fill AreaFill Area
Tower Basin / SumpTower Basin / Sump
Discharge Pipe / Filter OutletDischarge Pipe / Filter Outlet
Suction Pipe / Filter InletSuction Pipe / Filter Inlet
Side Stream Filter SkidSide Stream Filter Skid
UFF Filter Face Lift
Flow rates from 17 to 475 GPM
Patent pending universal face pipe design
Metal Pumps
Heavy duty 3-way ball valves (mechanically linked)
NEMA 4X control panel
Stainless steel base
Oversized actuator, 600 in-lb torque
Retrofits to ANY filter regardless of manufacturer
Typical Dirty System - Fouling
Clean
Moderate FoulingFouling is the formation of
deposits on heat transfer surfaces.
Heavy Fouling
Side-Stream Filtration
400 Ton Cooling Tower
Based on tonnage and 3 gpm/ton:
400 Ton x 3 gpm/ton = 1200 gpm5% x 1200 gpm = 60 gpm side stream flow rate
Based on side stream filter flow rate of one system volume per hour:
For example: Estimated system volume = 3,500 gallons At a turnover of 1 system volume per hour, 3,500 gallons/hr x 1 hr/60 min.= 58 gpm side stream flow rate
Multiple Vessel Configurations
Selecting the Right Tool
Sand Filtersor
Separators
Typically Separable Typically Separable MaterialsMaterials
Specific Specific GravityGravity
Aluminum 2.7
Ashes (coal) 2.0
Brass 9.0
Bronze & Copper 8.9
Carbon/Concrete/Lava 1.8 ~ 2.5
Coal (Anthracite) 1.3 ~ 1.9
Earth (silt/soil) 1.2 ~ 2.0
Glass (Crystal) 3.0
Granite / Gravel 2.5 ~ 3.0
Graphite 2.3
Iron 7.8
Lead 11.3
Limestone 2.8
Manganese 7.4
Nickel 8.9
Sand 2.6 ~ 2.8
Steel 7.8
Tin Ore 6.4 ~ 7.0
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74+ 74-40 40-20 74+ 74-40 40-20 74+ 74-40 40-20 74+ 74-40 40-20
Particle Size (microns)
Effic
ienc
y (%
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Multiple Pass
Single Pass
Centrifugal Separator Solids Removal Efficiency
Specific Gravity 7.5 Specific Gravity 3.6 Specific Gravity 2.6 Specific Gravity 1.7 Microns Microns Microns Microns
Most particulate in cooling tower water have a specific gravity in the range of 1.6 and are less than 20 microns; well below the operating limit of centrifugal separators.
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Particle Size (microns)
Effic
ienc
y (%
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Sand MediaSeparator
Typically, greater than 98% of contaminants in cooling tower water are less than 20 microns. Centrifugal separatorefficiency at this level is approximately 12%, compared to approximately 90% for standard efficiency sand media filters.
Sand Media Filter Vs. Centrifugal Separator
(particle specific gravity 2.6)
ParticleCount(per 100 ml)
0
100,000,000
200,000,000
300,000,000
400,000,000
500,000,000
600,000,000
0.5 < 1 1 < 5 5 < 15 15 < 30 30 < 50 > 50
Microns
Typical Distribution of Particles by Particle Count
Typical Distribution of Particles by Particle Volume
Particle Volume Distribution(mm3 per 100 Liters)
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
0.5 < 1 1 < 5 5 < 15 15 < 30 30 < 50 > 50Microns