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GASS™-2040 Gas Analysis Sampling Systems 2040-001.

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Presentation on theme: "GASS™-2040 Gas Analysis Sampling Systems 2040-001."— Presentation transcript:

1 GASS™-2040 Gas Analysis Sampling Systems

2 GASS-2040 New product introduction at AWMA
Combines capabilities of Probe / Mini-GASS™ and GASS™-II systems Can be mounted anywhere, including directly on stack flange with optional integral sample probe Most complete sample conditioning system on the market GASS-II discontinued, all other GASS systems still available

3 The General Problem Sample conditioning receives little attention,
Gas analysis for Emissions or Process Monitoring involves three steps: 1. Sampling Conditioning Analysis Samples are typically: Hot Wet Dirty Analyzers require samples to be: Cool Dry Clean Sample conditioning receives little attention, but is often the most difficult step of the three.

4 Sampling Methods In-situ analysis 2. Extraction 
a. Wet (filtered only) b. Dilution c. Drying 1) Absorption 2) Condensation 3) Selective permeation

5 Typical Problems in Gas Samples
Gases Rarely a problem Liquids Water Acid mists (sulfuric acid) Solids Ammonia salts Excessive particulates

6 Water Problems Clogging or damage to analyzers or components
Requirement for heated lines or analyzers Long calibration times due to adsorption/desorption Interference in infrared (or other) measurements Loss of water-soluble analytes Participation in unwanted chemical reactions

7 Sulfur Dioxide Solubility in Water
100 90 80 70 60 SO2 Solubility (ml SO2/100 ml H2O) 50 40 30 20 10 10 20 30 40 50 60 70 80 90 100 Temperature (Deg. C)

8 Sulfur Dioxide Solubility in Water
Temperature Degree C SO2 Solubility in H2O ml SO2 / 100 ml H2O Temperature Degree C SO2 Solubility in H2O ml SO2 / 100 ml H2O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 79.8 77.2 74.7 72.2 69.8 67.5 65.2 63.0 60.8 58.7 56.6 54.7 52.7 50.8 49.0 47.3 45.6 43.9 18 19 20 21 22 23 24 25 26 27 28 29 30 35 40 90 100 42.4 40.8 39.4 38.0 36.8 35.3 34.0 32.8 31.6 30.4 29.3 28.2 27.2 22.5 18.8 2.1 .0

9 Unwanted Reactions 1. Formation of Sulfuric Acid
a. 2SO2 + O2  2SO3 SO3 + H2O H2SO4 b. NO2 + SO2 + H2O H2SO4 + NO 2. Formation of Ammonia Salts a. NH3 + SO2 + H2O NH4HSO3 b. NH3 + SO3 + H2O NH4HSO4       

10 Acid Mist Problems Mists are very corrosive, viscous, clogging
Difficult to remove; slow to coalesce into sizeable droplets when cooled Special coalescing filters helpful

11 Ammonia Salts Problems
Present special problems Ammonia is gas, passes through probe filter Forms clogs if allowed to cool, react with SO2 or SO3 and H2O to form ammonium salts Requires special absorbents to remove ammonia before cooling to prevent clogs

12 Excessive Particulates
Easiest to solve Probe filter with heated blowback Secondary filter with finer porosity Inertial bypass filters if necessary

13 The Solution GASS™-2040 Gas Analysis Sampling Systems
Retain water-soluble analytes (HCl, SO2, NOX) Achieve low final sample dew points (down to -25oC) Accept high sample flow rates (up to 25 L/minute) Accommodate nearly any sample (customized) Eliminate heated sample lines (stack mounting)

14 GASS™-2040 Gas Analysis Sampling System

15 GASS™-2040 Overview Stainless steel NEMA-4X enclosure
Integral probe with heated filter and blowback Hastelloy heat exchanger Coalescing/particulate filter with automatic drain Ammonia scrubber(s) Wide range of dryers, double dryers PLC with Ethernet for remote control Safety interlocks and alarms Sample pump, other options to customize system

16 Integral Probe, Filter and Blowback

17 Integral Probe, Filter and Blowback
Range of probe lengths and materials Directly connected, no heated line Probe filter stainless steel or glass-coated Temperature controlled by PLC Avoids losses of analytes in filter Blowback heated, closely coupled Blowback timing controlled by PLC Avoids condensation during blowback

18 Coalescing / Particulate Filter and Drain

19 Coalescing / Particulate Filter

20 Coalescing / Particulate Filter

21 Coalescing / Particulate Filter
Two-layer, coalescing and particle element Temperature controlled by PLC Removes particles >0.1 micron and mists Hastelloy heat exchanger Improves acid mist removal Available in stainless steel or PVDF Kynar® Corrosion resistant

22 Automatic Drain

23 Automatic Drain Coalesced liquid removed by eductor
Drain timing controlled by PLC Reliable, no peristaltic pump Eductor entirely PTFE Teflon® Full corrosion resistance Teflon check valve Positive seal when not operating

24 Ammonia Scrubber

25 Ammonia Scrubber

26 Ammonia Scrubber

27 Ammonia Scrubber Proprietary scrubbing media
Long-lasting, selective for ammonia No tools needed for media replacement Easy maintenance Stainless steel with stainless steel shell or polysulfone shell for visibility Corrosion resistant

28 Nafion® Gas Dryer

29 NAFION® Chemical Structure
[ (CF2 CF2 )m CF CF2 ] n O CF2 CF CF3 Z O WHEN: m = 5 to 13.5 n = ca 1,000 z = 1,2,3... x = 1 to 13 CF2 CF2 SO3 H ● [H2O]X

30 NAFION Gas Dryer Principle

31 NAFION Dryer Schematic

32 PD-Series Polytube Dryers

33 NAFION Selectivity Nafion permeation selectivity is based on
chemical reactivity, not size Only compounds that chemically associate with sulfonic acid permeate through Nafion Bases associate with sulfonic acid and permeate through Nafion Very few bases are gases at typical operating temperatures, so very few compounds permeate

34 Effect on Analytes Removes water directly as water vapor.
No condensate forms to dissolve analytes. Removes compounds with hydroxyl groups (-OH) H2O, some organics Retains important compounds O2, O3, CO, CO2, NOX, SO2, SO3, H2S, Hg, HCl

35 PD-Series Performance Chart
DEWPOINT (oC) -40 -50 -30 FLOW (liters/min.) PD-50T 1 2 3 4 5 6 7 8 9 10 -45 -35 12” 24” 48” 72” -25 -20 -15 -10 -5 15 20 PD-100T 12 14 16 18 PD-200T 24 28 32 36 40 MODEL

36 Low Final Dew Points Dew point as low as -45oC can be achieved.
Dew point of -10oC to -25oC is typical. Performance is a function of dryer size and sample flow rate. Analytical results and reliability improved by reducing water interferences. Acid mist problems overcome.

37 PLC

38 PLC Digital selection of operating conditions
Precise control of operating parameters Standard unit, easy programming Easy maintenance and updating Optional Ethernet connection Remote control and data display

39 Optional Heatless Dryer

40 Optional Heatless Dryer

41 Optional Heatless Dryer

42 Optional Heatless Dryer
Steady supply of dry air for system use Continuous 60 L/min. to -45ºC dewpoint No line pressure surges Inactive canister repressurized before reuse Very reliable with no maintenance Electronic switching, permanent spring- loaded molecular sieve

43 Optional Sample Pump

44 Optional Sample Pump Pump head mounted in heated zone
Prevents sample condensation Pump motor mounted in unheated zone Improves pump reliability Pump head stainless steel or Teflon Corrosion-resistant, long life Sample transported under pressure Avoids contamination from minor leaks

45 GASS-2040 Options Integral Probe Probe Filter Blowback Bypass Filter
Coalescing Filter Automatic Drain Ammonia Scrubbers Dryer Sizes Purge Heatless Dryer Ethernet Connection X- or Z-Purge Kynar® Fittings Sample Pump Purge Eductor

46 Summation Proven technology, years of experience
GASS™-2040 combines all necessary sampling and conditioning in one package Proven technology, years of experience Opportunity to eliminate heated lines Many options; buy only what is needed Smaller systems available for less demanding applications

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