Recycling of waste heat boiler effluent to an oxygen-enriched claus reaction furnace

1989 ◽  
Vol 23 (3) ◽  
pp. v
Author(s):  
Paul Pendergraft ◽  
Gary M Bond
Keyword(s):  
Waste Heat ◽  
Waste Heat Boiler ◽  
Claus Reaction ◽  
Reaction Furnace

scholarly journals Kinetic Reactions Modeling and Optimization of Claus Process

2020 ◽  
Author(s):  
Muhammad Arslan Zahid ◽  
Faisal Ali ◽  
Muhammad Mubashir ◽  
Faheem Iqbal
Keyword(s):  
Waste Heat ◽  
Aspen Plus ◽  
H2 Production ◽  
Sulfur Recovery ◽  
Waste Heat Boiler ◽  
Ammonia Gas ◽  
Claus Process ◽  
Simulation And Optimization ◽  
Catalyst Life ◽  
Reaction Furnace

There are many pollution and environment problem in the human ecosystem. There are different methods are used to removal of sulfur from sour gases for example Basic Claus process and Modified Claus process . There are different chemical software are used for simulation and optimization of Claus process for example Aspen Plus and Chemcad ECT. The Gibbs free energy method is introduced and model of Claus process. There are new parameter are introduced in reaction furnace to reduce the error from 33% to 7 %. The waste heat boiler is installed at the reaction furnace in which high pressure stream is produced and study the decomposition the hydrogen sulphide. The new rate of reaction is introduced of the enhancement of H2 production in chemical process. The simulation of reaction furnace in Aspen plus software is the maximum utilization of process. Due to suitable operating condition of reaction furnace is caused the maximum destruction of ammonia gas in the reactor. When we are increasing the oxygen concentration and temperature of feed is causing decreasing the ammonia production in reaction furnace. It is below than acceptance value of ammonia is 150 ppm in the reaction furnace. The presence of oxygen components, Sulfur oxide, hydroxide components are effect on decreasing the amount of ammonia in furnace and temperature is about at 1350⁰C. It is noted that when the production of sulfur recovery is decrease in Claus process and the production of carbon monoxide is increase in the thermal section at the existence. Now we are work on parametric studies of furnace that could be causes the production of ammonia destruction and CO emission in the Claus process. Due to optimize the reaction furnace parameter are help to get large of sulfur production, ammonia gas destruction, increased the catalyst life and decreased of dangerous gases.

A Means of Avoiding Sulfur Recovery Reaction Furnace Fired Tube Boiler Failures

2009 ◽  
Author(s):  
Mike Porter ◽  
Dennis Martens ◽  
Sean McGuffie ◽  
John Wheeler
Keyword(s):  
Heat Flux ◽  
Waste Heat ◽  
Local Heat ◽  
Sulfur Recovery ◽  
Steam Generation ◽  
Waste Heat Boiler ◽  
Flux Limit ◽  
Local Water ◽  
Reaction Furnace ◽  
Tube Failure

One of the common causes of premature tube failure in fired tube boilers — technically described as film boiling — is overheating of the tubes caused by steam blanketing. Current literature contains a significant amount of information on this problem, but not much in the way of definitive guidance for avoiding the problem. General “rules of thumb” are available for identifying the heat flux limit required to avoid the problem as in Martens et al [1]. Unfortunately, the values presented by different sources are often in disagreement. This paper will look at a sulfur recovery unit (SRU) Claus waste heat boiler application and, through the use of Computational Fluid Dynamics (CFD), develop a means of predicting the conditions that lead to steam blanketing and resultant tube failure. Local heat flux conditions at gas side discontinuities (such as the tube inlet ceramic ferrule terminations) combined with associated local water side steam entrainment, and steam generation with coupled velocity effects are discussed.

Investigating Three Different Models for Simulation of the Thermal Stage of an Industrial Split-Flow SRU Based on Equilibrium-Kinetic Approach with Heat Loss

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
Mohammad Hossein Kardan ◽  
Reza Eslamloueyan
Keyword(s):  
Kinetic Model ◽  
Heat Loss ◽  
Conversion Efficiency ◽  
Waste Heat ◽  
Molar Ratio ◽  
Percentage Error ◽  
Sulfur Recovery ◽  
Waste Heat Boiler ◽  
Split Flow ◽  
Reaction Furnace

Abstract Modified Claus process is the most important process that recovers elemental sulfur from H2S. The thermal stage of sulfur recovery unit (SRU), including the reaction furnace (RF) and waste heat boiler (WHB), plays a critically important role in sulfur recovery percentage of the unit. In this article, three methods including kinetic (PFR model), equilibrium and equilibrium-kinetic models have been investigated in order to predict the reaction furnace effluent conditions. The comparison of results with industrial data shows that kinetic model (for whole the thermal stage) is the most accurate model for simulation of the thermal stage of the industrial split-flow SRU. Mean absolute percentage error for the considered kinetic model is 4.59 %. For the first time, the consequences of considering heat loss from the reaction furnace on calculated molar flows are studied. The results show that considering heat loss only affects better prediction of some effluent molar flow rates such as CO and SO2, and its effect is not significant on the results. Eventually the effects of feed preheating on some important parameters like sulfur conversion efficiency, H2S to SO2 molar ratio and important effluent molar flows are investigated. The results indicate that feed preheating will reduce the sulfur conversion efficiency. It is also noticeable that by reducing the feed temperature to 490 K, H2S/SO2 molar ratio reaches to its optimum value of 2.

scholarly journals Optimization design of thermal system for industrial waste heat power generation

2021 ◽  
Vol 261 ◽  
pp. 01047
Author(s):  
Fengchang Sun ◽  
Shiyue Li ◽  
Zhonghua Bai ◽  
Changhai Miao ◽  
Xiaochuan Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Industrial Waste ◽  
Optimization Design ◽  
Waste Heat ◽  
Design Method ◽  
Utilization Rate ◽  
Thermal System ◽  
Heat Power ◽  
Waste Heat Boiler ◽  
Industrial Waste Heat

In order to improve the utilization rate of industrial waste heat and improve the fine design level of waste heat power station, this paper constructs the mathematical model of waste heat boiler and steam turbine, and puts forward the optimization design method of thermal system of waste heat power generation project. By using typical cases, it is proved that there is the optimal design pressure of HRSG, which makes the power generation of the system maximum, and provides a method to improve the power generation of HRSG.

Process Plant Application of an Aircraft-Type Gas Turbine

1969 ◽  
Author(s):  
H. B. Yancy
Keyword(s):  
Control Systems ◽  
Waste Heat ◽  
Subsequent Development ◽  
Lubricating Oil ◽  
Industrial Plant ◽  
Gas Generator ◽  
Waste Heat Boiler ◽  
Power Turbine ◽  
Petroleum Company ◽  
Helium Plant

The installation to be discussed in this paper was one of the first gas generator, power turbine, centrifugal compressor design combinations to be put in ground (as opposed to airplane) power applications. As a consequence the control systems, waste heat boiler installation and other parts of the facility proved to be other than adequate for continuous duty industrial plant use and as such, has gone through a subsequent development period to overcome the many problems that were encountered. This should be kept in mind as one reads the article. The present-day industrial gas generator units incorporate simplified and reliable control systems and other successful features as a result of this earlier experimental and prototype installation. Revisions to the Phillips Petroleum Company Dumas Helium Plant Pratt Whitney GG3C gas generator and related equipment have greatly increased onstream capabilities. Replacement of unreliable controls and electrical relays has decreased unwarranted shutdowns from 80 hr in 1963 to 8 hr in 1967. Improvements in lubricating oil have increased the time between oil changes from 300 to 3000 hr. Design changes in bearings, exhaust hood, and the lubricating oil system have increased the gas generator’s reliability. The Cooper-Bessemer RT-48 free power turbine has operated maintenance-free since startup. Cooper-Bessemer’s latest design has solved the reaction turbine hood stress cracking problem. Use of this type facility in helium plant service offers advantages, but lack of flexibility has caused a considerable amount of product loss at Dumas Helium Plant.

Fire in secondary reformer outlet line to waste heat boiler

2002 ◽  
Vol 21 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Jagmohan Singh ◽  
P. Basu ◽  
B. M. Rao
Keyword(s):  
Waste Heat ◽  
Waste Heat Boiler

scholarly journals The Design of a 3MW Kalina Cycle Experimental Plant

1988 ◽  
Author(s):  
A. I. Kalina ◽  
H. M. Leibowitz
Keyword(s):  
Waste Heat ◽  
Department Of Energy ◽  
Flow Diagram ◽  
Experimental Plant ◽  
Waste Heat Boiler ◽  
Process Flow Diagram ◽  
Kalina Cycle ◽  
Experimental Project ◽  
Major Equipment ◽  
Steam Cycle

An experimental project is now underway to demonstrate the advantages of the Kalina cycle technology. A Kalina Cycle Experimental Plant (KCEP) will be built as a 3 MW bottoming cycle using the waste heat from a facility within the Energy Technology Engineering Center (ETEC), a U.S. Department of Energy laboratory located in Canoga Park, California. The design of the experimental plant is presented, including the process flow diagram, heat and mass balance, and specifications for the plant’s major equipment; the waste heat boiler, turbine generator and distillation/condensation subsystem. Using a mixture of ammonia and water at a mass ratio of 70/30, and a new condenser design based on absorption principles, the Kalina cycle plant will attempt to demonstrate its superiority over the Rankine steam cycle. Based on single pressure designs at comparable peak cycle temperatures, the Kalina cycle’s output should exceed that of the steam cycle by 25 percent.

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