Recovery of calcium carbonate and sulfur from FGD scrubber waste

  • 1.84 MB
  • 4392 Downloads
  • English

U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory, Center for Environmental Research Information [distributor] , Research Triangle Park, NC, Cincinnati, OH
Flue gases -- Desulphurization., Scrubber (Chemical technology), Calcium carbonate., Sul
StatementR.P. Arganbright ... [et al.].
ContributionsArganbright, R. P., Industrial Environmental Research Laboratory (Research Triangle Park, N.C.)
The Physical Object
Pagination7 p. :
ID Numbers
Open LibraryOL17655893M

Get this from a library. Recovery of calcium carbonate and sulfur from FGD scrubber waste. [R Recovery of calcium carbonate and sulfur from FGD scrubber waste book Arganbright; Industrial Environmental Research Laboratory (Research Triangle Park, N.C.);].

United States Environmental Protection Agency Industrial Environmental Research Laboratory Research Triangle Park NC Research and Development EPA/S August Project Summary Recovery of Calcium Carbonate and Sulfur from FGD Scrubber Waste R.

Arganbright, P. Huang, G. Benner, B. Mandelik, T. Roche, and P. Smith Key process steps were demonstrated in.

Download Recovery of calcium carbonate and sulfur from FGD scrubber waste EPUB

Gypsum waste can represent a good resource for the recovery of sulphur (S) and calcium carbonate (CaCO 3) (Nengovhela et al., ). Elemental sulphur is an essential raw material for many. Sulfur is present in coal and oil and during combustion it is oxidized to sulfur dioxide (SO 2).

Limestone, constituted mainly by calcium carbonate, is widely utilized in Flue Gas Desulfurization (FGD) processes because of the ability to capture the sulfur as sulfate salts.

The evaluation of limestone reactivity is therefore a key aspect for. The purpose of the study was to establish optimum operating conditions for the recovery of valuable products e.g., sulphur and precipitated calcium carbonate, from waste gypsum, hence, offer an.

Dolomitic limestone, containing 15 to 45 percent magnesium car- bonate and 50 to 80 percent calcium carbonate.

Description Recovery of calcium carbonate and sulfur from FGD scrubber waste FB2

High-calcium limestone is the most widely used for S02 absorption. A typical composition of such a limestone is 95 percent calcium carbonate, percent magnesium carbonate. EPA/F Air Pollution Control Technology Fact Sheet EPA-CICA Fact Sheet Flue Gas Desulfurization1 Name of Technology: Flue Gas Desulfurization (FGD) - Wet, Spray Dry, and Dry Scrubbers Type of Technology: Control Device - absorption and reaction using an alkaline reagent to produce a solid Size: 33KB.

products like sulphur and calcium carbonate be recovered from the low quality gypsum. The aim of this project was to evaluate a process for converting waste gypsum into sulphur.

The process evaluated consists of the following stages: reduction of gypsum to calcium sulphide; stripping of the sulphide with CO. gas and the production of sulphur. FGD Scrubber Material - Material Description ORIGIN The burning of coal produces sulfur dioxide (SO 2) Clean Air Act and subsequent amendments regulate SO 2 emissions from burning coal.

Coal fired power plants installed flue gas desulfurization (FGD) technology for reducing SO 2 emissions. The two most common scrubber technology used today are wet or dry systems. Waste Manag. Dec; doi: / Epub Aug Synthesis of high-purity precipitated calcium carbonate during the process of recovery of elemental sulphur from gypsum by: EPA-CICA Fact Sheet Packed-Bed/Packed-Tower Scrubber3 a.

Capital Cost: $23, to $, per sm3/sec ($11 to $55 per scfm) b. O & M Cost: $32, to $, per sm3/sec ($15 to $49 per scfm), annually c. Annualized Cost: $36, to $, per sm3/sec ($17 to $78 per scfm), annually d.

Cost Effectiveness: $ to $ per metric ton ($ to $ per short ton). Q. To reduce atmospheric pollution, the waste gases from a coal-burning power station are passes through powdered calcium carbonate. Which gas will not be removed by powdered calcium carbonate.

Carbon monoxide B. nitrogen dioxide C.

Details Recovery of calcium carbonate and sulfur from FGD scrubber waste EPUB

phosphorous (v) oxide D. sulfur dioxide Could anyone give an answer + explaination. It would be very much appreciated. The production of elemental sulphur and calcium carbonate (CaCO 3) from gypsum waste can be achieved by thermally reducing the waste into calcium sulphide (CaS), which is then subjected to a direct aqueous carbonation step for the generation of hydrogen sulphide (H 2 S) and CaCO 3.H 2 S can subsequently be converted to elemental sulphur via the commercially available chemical catalytic Cited by: 9.

A process is provided by means of acid scrubbing in combination with electrolysis for removing sulfur dioxide from a waste gas stream such as effluent vent of flue gas, for purposes of economy, for achieving a useful by-product, and for minimizing environmental by: Abstract.

In the regeneration stage of the double alkali FGD process which uses lime as a regenerant, the flow-mixing of a slurry of lime with a sodium bisulfite solution in a truncated ''Y'' (inlet tubes in ID; common outlet tube in ID, 2 ft long) causes the reaction to occur essentially instantaneously if no settling of the slurry occurs during mixing.

marble waste and limestone are the same, marble wastes can be used as an alternative source for the production of precipitated calcium carbonate. By this way, both the adverse environmental effects of marble wastes can be prevented and the wastes can be used as a cheaper source for precipitated calcium carbonate manufacturing Size: 1MB.

produce sulfur dioxide, which is converted to sulfuric acid. The U.S. Bureau of Mines has investigated the reductive roasting of gypsum (3), the conversion of calcium sulfide (CaS) to elemental sulfur (4), and sulfur dioxide emission control (5). The latter process involved the reaction of sulfur dioxide and hydrogen sulfide to produce elementalCited by: 3.

The paper is an overview of utility flue-gas desulfurization (FGD) technology and costs. The two commercially offered throwaway and salable product systems considered to be the most important for near-term (through ) SO/sub 2/ control are: throwaway product systems--lime and limestone scrubbing (both sludge and gypsum variations) and dual (double) alkali; and salable product systems.

Batch reactors were used to assess the technical feasibility of calcium carbonate recovery and its use for pre-treatment of acid mine drainage (AMD) from coal mines. The effects of key process parameters, such as the amount of acid (HCl/calcium molar ratio), the pH and the CO(2) flow rate were by: 5.

1 Conversion of calcium sulphide to calcium carbonate during the process of recovery of elemental sulphur from gypsum waste M. de Beera,b*, J.P. Mareec, L. Liebenbergb, and F.J. Doucetd* a DST/CSIR National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, PO BoxPretoriaRepublic of South Africa.

An aspect of scrubber operation that emerges from the foregoing discussion is that control of pH is important for success: to prevent scaling by coprecipitated calcium sulfite and calcium carbonate when pH is too high, and to prevent oxidation of sulfite to sulfate when pH is too low.

beyond acid gas injection and the piling of elemental sulfur. Here we introduce a process concept for the disposal of sulfur as magnesium sulfate brine. Besides H2S and air, the process requires the addition of an alkaline mineral, such as olivine (Mg2SiO4), and water or seawater.

As a waste product, MgSO4 is benign and thermodynamically Size: 72KB. The vent from this process which contains particulate and sulfur dioxide can be vented to the wet scrubber for particulate removal and to the flue gas scrubber for sulfur dioxide recovery.

THe hydrogen sulfide may also be processed by the conventional Claus reactor where one-third of the hydrogen sulfide is burned and steam is generated forming.

Calcium Based Sulfur Recovery Process for Kraft Black Liquor Gasification - Proof of Concept, International Chemical Recovery Conference Proceedings This paper describes a novel process for use in black liquor gasification systems to recover sulfur from the product gas by reaction with lime.

In this study carbide lime waste was used as raw material to produce precipitated calcium carbonate (PCC). Carbide lime is an industrial waste from acetylene gas industry which uses limestone in its production. The use of PCC as fillers in paper making can reduce the production cost and improve the paper properties such as opacity and.

SO 2 is an acid gas, and, therefore, the typical sorbent slurries or other materials used to remove the SO 2 from the flue gases are alkaline.

The reaction taking place in wet scrubbing using a CaCO 3 slurry produces calcium sulfite (CaSO 3) and may be expressed in the simplified dry form as. CaCO 3 (s) + SO 2 (g) → CaSO 3 (s) + CO 2 (g). When wet scrubbing with a Ca(OH) 2 (hydrated lime. THE RECOVERY OF SULPHUR FROM WASTE GYPSUM by Ryneth Nkhangweleni Nengovhela Figure Process flow diagram for the sulphur recovery process Figure The 5 ℓ jacketed, pressurised & continuously stirred reactor used Figure Behaviour of calcium, pH and sulphide during the sulphide.

or chronic lung or heart disease are the most sensitive to SO2. Flue gas desulphurization (FGD) is the technique used for removal of sulphur dioxide from the exhaust flue gases in Power plants.

Therefore our aim of the project is to reduce the percent SO2 in environment. The CSIR has developed a novel process to reclaim high-quality precipitated calcium carbonate (PCC) from calcium-rich industrial solid waste. High-quality calcium carbonate is useful for various specialised industrial applications such as gastric acid treatment, tablet filling in pharmaceuticals, plastics, paint, adhesives and in pulp and papermaking.

Sulfur Recovery Process Sulfur-bearing waste thermal oxidation systems typically treat the “tail gases” produced during the sulfur recovery process in a petroleum refinery or other hydrocarbon processing plants. The sulfur recovery process recovers elemental sulfur from the refining processes and the tail gas thermal oxidizer serves to.

Sulfur Recovery Process Tail Gas Incinerators The tail gas resulting from the upstream Claus unit contains sulfur-bearing compounds that must be incinerated in order to oxidize the various compounds to sulfur dioxide and sulfur trioxide. The incineration process typically occurs between OF (The sulfur remains in solution as polysulfide ion until it is precipitated inside the scrubber.

Preliminary economic analysis has shown that using coal-derived or other cheap electricity, the H 2 generated from H 2 S in-house would be cost competitive with methane-derived H 2 on the open market.Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low pH).It can have harmful effects on plants, aquatic animals and infrastructure.

Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.