Gas and particle flow characteristics in the gas reversing chamber of a syngas cooler for a 300 MWe IGCC process

Park, Sangbin; Ye, Insoo; Oh, Junho; Ryu, Changkook; Koo, Ja Hyung

doi:10.1016/j.applthermaleng.2014.04.060

Cited by 18 publications

(4 citation statements)

References 15 publications

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“…The convective syngas cooler is usually set at the downstream of the RSC or gas quenching, for further heat recovery after the preliminarily cooling of syngas. The cooling pipe arrangement of a convective syngas cooler is relatively dense, and the gas flow channel is narrow, which are easy to cause a blockage. , The complex piping layout makes it difficult to clean the convective syngas cooler. Uebel et al pointed out that the radiation-quenching process had the highest thermal efficiency among various cooling methods.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Heat Transfer and a Forging Plate Structure in a Radiant Syngas Cooler with Radiation Screens

Qiu

Guo

Wei

et al. 2020

Ind. Eng. Chem. Res.

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High-temperature syngas is produced by entrained-flow coal gasification. A traditional quenching process has the drawback of low heat recovery efficiency, and the cleaning of convective syngas cooler is a big problem. Thus, the combination of a radiant syngas cooler and a quench chamber is a more promising way for heat recovery and syngas preliminary purification. In this study, based on the traditional radiant syngas cooler, sixteen radiation screens are added to increase the heat exchange area, so as to further improve heat recovery efficiency of the radiant syngas cooler. Heat transfer and structure analysis of a forging plate on the top of the radiation screen are carried out by numerical simulation. The radiation screen changes the internal spatial structure of the radiant syngas cooler, which also affects the heat transfer characteristics of the membrane wall. The circumferential temperature distribution of the cylinder membrane wall is not uniform, and the temperature is the highest at the central pipe. The surface heat flux of the cooling pipes on the radiation screen reaches the maximum value at the position with a distance of about 6 m from the top. The slag and fly ash carried in the gas flow deposit on the wall surface and form deposition layers, which protects the forging plate and cooling pipes, but reduces the heat transfer efficiency.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Heat Transfer and a Forging Plate Structure in a Radiant Syngas Cooler with Radiation Screens

Qiu

Guo

Wei

et al. 2020

Ind. Eng. Chem. Res.

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“…However, due to the serious problem of slag blocking, the development and application of this equipment has gradually tapered off. [28] By contrast, the combined radiation-quenching method is more friendly for syngas cooling, which is a system connecting an RSC and a quench chamber, [16,23,29] as shown in Figure 1. The high-temperature syngas produced by the gasification reactions passes through the RSC and quench chamber in turn.…”

Section: Introductionmentioning

confidence: 99%

Performance evolution of industrial radiant syngas cooler with radiation screens using numerical simulation

Wang

Qiu

et al. 2022

Can J Chem Eng

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Radiant syngas cooler (RSC) is an important piece of equipment for heat recovery and steam generation in the gasification plant. In this work, the industrial RSC model of an opposed multi-burner coal-water-slurry gasification device is established, and the heat recovery performance of RSC is studied by numerical simulation method. The simulation result of the total heat transfer rate is compared with the industrial operation data. The effect of different operating parameters on RSC is further studied, including the operating load, inlet syngas temperature, and ash deposition thickness. The results show that there is a spindle-shaped high-temperature zone on the circumferential membrane wall surface with a distance of 6.5 m from the top under the basic operating conditions. There is also an obvious high-temperature zone in the mid-upper section

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“…The erosion (wear) rate is affected by a large number of parameters: the mechanical properties of the two-phase flow particles (material properties, particle size and shape); the properties of the wall material subjected to wear; gas properties; two-phase (gas-particles) flow velocity; particle concentration in the flow; the angle of particle impact on the wall surface; flow channel geometry. For the spiral convective gas cooler (GC) used in a Shell gasification-based combined cycle unit [1], three parameters from the above list are variables: flow velocity, particle concentration, and particle impact angle. According to literature data, the dependence of erosion on the flow velocity (u) is a power function with an exponent of 2-4 [2], the dependence of erosion on the particle concentration (γ) is linear, and its dependence on the particle incidence angle (α) has a maximum at α = 25-45° [3,4].…”

mentioning

confidence: 99%

“…The computational grid was hexahedral. The parameters of the syngas are presented in Table 1 [1]. The particle diameter is varied from 2 to 100 µm, and the density is 2800 kg/m 3 .…”

mentioning

confidence: 99%

Design Optimization of a Helical Coil Gas Cooler Based on the Results of CFD Modeling of Erosion Wear

Mikula

Maslennikov

Bogatova

2022

J. Phys.: Conf. Ser.

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Simulation of erosion wear and design optimization have been performed for a convective gas cooler with a helical coil. Based on the results of simulation of the standard gas cooler design with a flat baffle used in Shell gasification-based combined cycle unit, it is concluded that the particle impact angle is the main factor determining the erosion maximum. To reduce erosion, it is necessary to install a structural element instead of the flat baffle to align the flow path of ash particles at the inlet to the gas cooler. The results of simulation for various baffle shapes show that a hemispherical baffle is optimal. The use of a hemispherical baffle plate made it possible to align the ash particle flow path at the inlet to the gas cooler channels and reduce the maximum level of erosion by a factor of almost 4 compared to the standard geometry of the baffle plate.

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Gas and particle flow characteristics in the gas reversing chamber of a syngas cooler for a 300 MWe IGCC process

Cited by 18 publications

References 15 publications

Numerical Simulation of Heat Transfer and a Forging Plate Structure in a Radiant Syngas Cooler with Radiation Screens

Numerical Simulation of Heat Transfer and a Forging Plate Structure in a Radiant Syngas Cooler with Radiation Screens

Performance evolution of industrial radiant syngas cooler with radiation screens using numerical simulation

Design Optimization of a Helical Coil Gas Cooler Based on the Results of CFD Modeling of Erosion Wear

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