The present invention is a system and method for treating a flue gas stream to remove strong acid compounds selected from the group consisting of hydrofluoric acid (HF), hydrochloric acid (HCl), sulfuric acid (H 2 SO 4 ), and sulfur trioxide (SO 3 ) by injecting a sodium sorbent selected from the group consisting of sodium sesquicarbonate, sodium carbonate-bicarbonate, trona ore, mechanically ...
The FGD units use the limestone/gypsum wet scrubbing process. This involves lime slurry prepared in an agitated reactor that is pumped to the top of the absorption tower, where it is sprayed into the rising flue gas by nozzles. As a result, SO x in the flue gas stream is washed out (absorbed). Subsequently, a suspension of gypsum as a reacting ...
Feb 01, 1980· The liquid slurry is known to have density, surface ... currently do not have flue gas desulfurization (FGD) units or selective catalytic reduction systems (SCRs) will be required to adapt in a short timeframe. Wet- scrubber FGD is characterized as one of the most ... Test Fluids and Monitoring …
Forced Air Oxidation In Wet FGD. For over 50 years, we have supplied multistage centrifugal blower solutions that come with lower initial cost and superior mechanical reliability when compared to high-speed single-stage blowers. Hoffman & Lamson has the product knowledge and industry expertise to design and manufacture air blower technologies ...
Mar 26, 2000· The reagent feed stream typically has a solids loading of 25-40 wt%. Reagent slurries are typically near ambient temperature but can be a warm as 120°F (49°C). Reagent slurry densities range from 71.4-83.7 lb/ft 3 (1.15-1.34 kg/L) at 120°F (49°C). Typical pH …
70,000 ppm of Chlorides in the slurry. Up until now only metal vessels have life of plant expectancy. However, the recent rise in the cost of alloys typically used in FGD vessels has led to the application of a new design system for FGD vessel construction. For the new BOA plants, RWE selected the patented
Monitoring System (CEMS) for a pollutant, then extensive and frequent measurements of the HAPs ... Flue Gas Desulfurization (FGD) system. The measurement requirements for individuals HAPs are ... while spraying a lime slurry into a vessel where the slurry dries at the same time as it …
– Monitor key process parameters – Process trends, reports, historical ... Gypsum Solids / Density Control WPCA Wet FGD Seminar - December 1, 2008. Density Measurement Nuclear Density Meter ... SLURRY DENSITY METER LOCAL DISPLAY PANEL Density Instrumentation
Slurry Density The density of the slurry is measured automatically and continuously in the nucleonic density gauge ( Figure 3.23 ) by using a radioactive source. The gamma rays produced by this source pass through the pipe walls and the slurry at an intensity that is inversely proportional to the pulp density .
Aug 21, 2019· Limestone Slurry Feed Pump Limestone is a carbonate sedimentary rock that is often composed of the skeletal fragments of marine organisms such as coral, foraminifera, and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). Limestone has numerous uses: as a building material, an essential component […]
For horizontal FGD designs, the fresh slurry (recycle and makeup streams) is often introduced at the last, or rear, stage of the absorber where the SO 2 content of the gas stream is lowest. The slurry contacted in the last stage is pumped forward to the next stage. This way, the slurry "flows" countercurrent to the gas flow.
----- EPA-600/8-79-009 April 1979 Lime FGD Systems Data Book by T.C. Ponder Jr., J.S. Hartman, H.M. Drake, R.P. Kleir, J.S. Master, A.N. Patkar, R.D. Terns, and J.D. Tuttle PEDCo Environmental, Inc. 11499 Chester Road Cincinnati, Ohio 45246 Contract No. 68-02-2603 Tasks No. 5 and 35 Program Element No. EHE624A EPA Project Officer: Warren D. Peters Industrial Environmental Research Laboratory ...
blowdown, recycle pump status, force oxidation flow rate, recycle slurry density, absorber pH, slurry height in each absorber, total air flow rate, flue gas oxygen concentration before FGD process. In Task Three, a full-Scale WFGD testing at Power Station S (Plant S) Unit 4 was carried
Recently, the Environmental Protection Agency (EPA) has focused their efforts on controlling mercury levels produced in various coal fired power plants. ORP sensors can further monitor the effluent from these scrubbers to ensure optimal mercury emission levels are achieved. By closely monitoring the mercury concentrations in the effluent, plant managers will be able to easily confirm their ...
Jun 05, 2010· I have also seen differential pressure used to measure density where the slurry is traveling in a vertical line, 2 taps about 3 ft apart flushed with water. I must agree with Walt however that Nuclear Density is the most reliable method. In my experience it has never been much of an issue getting approval.
Dec 31, 2011· Extenders lower the cement slurry density, reduce the amount of cement per unit volume of set product, or both. Weighting agents increase the density of the cement. F luid loss control agents control leakage of water from the cement slurry into porous formations, thereby preserving the designed cement slurry properties.
–bearing temperature monitoring –coal flow distribution measurement and control 8 Boiler (coal-fired furnace) –SCR system catalyst temperature monitoring –bottom ash removal –lime and fly ash slurry density and flow monitoring –fly ash hopper level monitoring –opacity monitors –heat exchanger and boiler tube alloy verification
Feb 26, 2012· The lime slurry mixing tank can be attached to the pumps (skid mounted) or can be stand alone, either way it is up to the user to determine what level of automation and security he/she would like on their lime slurry system (automatic or manual). Lime slurry is a highly effective, low cost alkali that is easy to feed, monitor, and control.
Jan 01, 2002· Flue gas (coal exhaust) desulfurization units (FGDs), intended to remove SO 2, NO x, and, to a lesser extent, Hg 2+, were introduced starting in the 1970s to mitigate the acid rain problem ...
WEIR SLURRY PUMPING MANUAL iv–1 Symbols used The terms slurry and mixture in this Manual are used interchangeably to describe a mix of any loose solids, made up in any proportions and combinations of any particle sizes and any conveying liquid.The subscript w refers to densities and specific gravities of liquids – mostly, but not exclusively, water.
the slurry. Any jetting effect would result in the FDM measuring a non-representative sample of the slurry. What is Flue Gas Desulfurization (FGD)? FGD is a set of technologies used to remove Sulfur Dioxide (SO2) from exhaust flue gases in coal, oil-fired, and waste- to-energy power stations. SO2 is a pollutant/irritant in air and
There are several types of wet flue gas desulfurization processes. Three of the most com-mon types employ lime or limestone, sodium alkali, or dual-alkali. Dual-alkali employs two alkali feed streams, typically pebble lime and soda ash. Currently, these make up about 90% of all FGD systems operating in the US. In general, sodium based and dual
stage dewatering concept. Waste slurry flows from the FGD absorber reaction tanks by gravity to the waste slurry tank. The waste slurry tank also receives slurry from the building drain system via the drain sump (see Figure 1). The waste slurry is pumped in a continuous circulating loop with take-offs for three 50 percent centrifuges (Figure 3).
Coal-fired power plants, in addition to emitting greenhouse gases, are a major source of local pollution and health damages throughout the world. China, the United States, and other countries that rely on coal for electricity production regulate emissions from coal …
With a total filter surface area of 93 m 2 each they are counted among the largest FGD belt filters in the world. For many years now FL has been relying on FGD gypsum filter cloths in VACUBELT belts from GKD. This is why in 2008 the two new blocks in Neurath were specifically equipped with the double-layered VACUBELT 2025 filter belt.
slurry that was pumped through a recirculation system to test the pump's affect on the slurry. As can be seen, for the first 16 hours there was no noticeable change in the PSDs of the slurry. The total number of particles greater than 2 microns was steady at 10,000 and the volume percentage contributed by the tail was about 0.002%.
US20060121616A1 US11/233,891 US23389105A US2006121616A1 US 20060121616 A1 US20060121616 A1 US 20060121616A1 US 23389105 A US23389105 A US 23389105A US 2006121616 A1 US2006121616 A1 US 2006121616A1 Authority US United States Prior art keywords fgd fgd unit settings controller performance Prior art date 2004-09-24 Legal status (The legal status is …
----- FIGURES Number Page 1-1 Some Alternative FGD Processes Available for Commercial Application 1-3 1-2 FGD Project Coordination Sequence 1-4 1-3 Limestone FGD Decision Sequence 1-6 1-4 Limestone FGD Process: Basic Process Flow Diagram 1-10 1-5 Limestone FGD Process: External Presaturator 1-13 1-6 Limestone FGD Process: Venturi Scrubber 1-14 1-7 Limestone FGD Process: …