Desulfurization wastewater is industrial wastewater with a high salt content, high metal ions, and high hardness produced by flue gas desulfurization of the limestone-gypsum method in coal-fired power plants. This paper summarizes the source of desulfurization wastewater, water quality characteristics, water quality impacts, and other factors, combined …
The improved desulfurization tower can ensure the uniform distribution of flue gas inlet, but also can improve the absorption efficiency and increase the recycling of reagents.
In this work, simulations were performed on a novel two-stage SO 2 absorption tower, namely, spray dispersion tower which consists of a spray section as the first stage and a bubble section as the second stage. The desulfurization performance of the spray dispersion tower was investigated by Computational Fluid Dynamics (CFD) method.
3. Flue Gas Desulfurization Technologies. Flue gas desulfurization is an efficient method for the reduction of the sulfur dioxide emissions. Citation 2 Many processes are available in the market, such as (a) wet scrubbers, (b) spray dry scrubbers, (c) sorbent injection, (d) regenerable processes, and (e) combined SO 2 /NO X removal processes. The different flue …
The number and position of the guide plates in the flue of the marine desulfurization tower need not be simulated and optimized. Through the analysis and comparison of the velocity flow field and SO 2 mass fraction cloud chart, the desulfurization efficiency of zero to three guide plates is 94.31%, 95%, 96.84% and 97.63% respectively. Then ...
Kiil [11] developed a detailed model for a wet flue gas desulfurization packed tower. Model predictions were compared to the experimental data such as gas-phase concentration profiles of SO 2, slurry pH profiles, solid content of the slurry, liquid-phase concentrations, and residual limestone in the gypsum.
Deacidification is an indispensable process when cleaning the sludge incineration flue gas. To ensure the flue gas meets the emission standard, guarantee the long-term stable operation of the purification system, and provide theoretical basis for the combined operation of different deacidification methods in the future, a numerical simulation model …
A simplified representation structure of the desulfurization tower based on plant data was presented in Fig. 1.As it was shown, the flue gas entered into the tower firstly at 10° angle from the bottom of the tower, then counter-current contacted with ammonium sulfate seriflux which was sprayed at two different levels (Layout 1 was the first and second spray …
Adsorptive desulfurization involves the removal of organic sulfur compounds from petroleum fractions by physicochemical adsorption processes. This is a low temperature and pressure technique and does not need costly hydrogen. The efficiency of adsorptive desulfurization depends mostly on the adsorbent's textural properties.
Desulfurization is the process to solidify the sulfur in the coal, thereby preventing the generation of SO 2 during coal combustion [76,77]. Currently, various desulfurization methods have been proposed and implemented in power generation [77–81]. Generally, desulfurization methods can be divided into three categories, namely pre-combustion ...
We propose a process not requiring external hydrogen feed to the feedstock. The hydrogen for the hydrogenation of the sulfur species is obtained directly from the hydrocarbon matrix reacting on a zeolite catalyst. The result is a desulfurization process with considerably simplified process management and a superior process startup.
In the desulfurization tower, water plays two important roles (Zhang et al., 2007; ... Sichuan, and was processed in a jaw crusher to obtain 3-5 mm particles, whose specific surface area was 4.487 m 2 /g. Employing Ethylene Diamine Tetraacetic Acid (EDTA) titration, the proportion of calcium oxide in the quicklime was determined to be 89%.
The Eulerian–Eulerian two-fluid model in conjunction with kinetic theory of granular flows (KTGF) was used for analyzing water vaporization and the semidry flue gas desulfurization process in a two-dimensional powder–particle spouted bed and revealed that the best mass- and heat-transfer effect of each phase can be found in the outer annulus and the near spout region.
PE Series Jaw Crusher Coarse Crushing of Ores / St. Spiral Stone Remove Machine Soil Stone Remover. Double Roller Fine Crusher Mud Soil Refinement and. PCX1210BII Adjustable Hammer Crusher Shale Coal Ga. ... Desulfurization tower; CONTACT US. Name: General Manager. Mobile：+86.
Spray dry scrubbing (SDS) is a type of semi-dry FGD technology that uses a fine spray of an alkaline slurry sorbent to interact with a SO 2 containing flue gas (FG). The SDS …
What is flue gas desulphurisation? Flue gas desulphurisation (FGD) describes a process that removes sulphur dioxide (SO 2) from a flue gas (exhaust gas) stream.Sulphur dioxide is released to the atmosphere when fossil fuels are …
The evaporation and motion of atomized droplets have an essential effect on the safe and efficient long-term operation of the desulphurization tower. Therefore, the two-phase flow model is established and solved by three-dimensional steady Reynolds-averaged Navier-Stokes equations; the droplets are tracked by Eulerian-Lagrangian method. The three factors, …
Specially Designed Spray Tower: Our spray towers minimize material build-up, ensuring low downtime for the plant. Dry Injection System: This system can be used for direct furnace injection, or duct injection prior to a baghouse or Electrostatic Precipitator …
A dynamic model for the flue gas desulfurization tower in coal-fired power plants is proposed. The model is validated with the data from a 350 MW unit. The penetration theory is adopted in modeling. The movement and the size of the slurry droplets, the temperature and the flow rate of the flue gas, as well as the chemical reactions have been ...
The behavior of gas-liquid two-phase flow in a desulfurization tower, the influence of operating parameters, such as the pH value of the solution and the velocity of flue gas on the desulfurization rate, and the distribution of the gas temperature and velocity field in the evaporation tower have been studied [172], [173], [174]. C. Li et al ...
Generally, two towers are installed with inter connecting piping and valves to operate each tower in a lead or lag mode. This feature allows for the optimal use of the desulfurization media and minimizes the operating cost of the desulfurization process.
Process. The slurry discharged from the desulfurization tower solids content of 15%, the main ingredient is solid magnesium sulfite. Discharge slurry must be dewatered …
Wet flue gas desulfurization (WFGD) system is the core equipment for removing SO 2 from coal-fired power plants, and it also has an important synergistic effect on the removal of selenium. ... Modeling Study of Selenium Migration Behavior in Wet Flue Gas Desulfurization Spray Towers Environ Sci Technol. 2020 Dec 15;54(24):16128-16137. doi: 10. ...
During ammonia desulfurization processes, ing overflow often occurs in the ammonium sulfate slurry of the desulfurization tower. The overflow wastes resources and results in industrial environmental pollution. In this study, the …
A demonstrated spray scattering tower with 5000Nm 3 /h flue gas of Changzhi power plant in Shanxi province, was used to simulate for verifying the consistency of two-phase flow with ammonia desulfurization model of the tower. The detailed structure and simplified computational domain of the spray scattering tower were presented in Fig. 2, Fig. 3 and Fig. …
The desulfurization ash is humidified as it passed through the humidifier. Finally, desulfurization ash and flue gas are distributed through a diversion plate, which is located right below the mechanical rakings. Flue gas flows downward along the tower and reacts with active ingredients of desulfurization in an effective reaction zone.
The slurry at the bottom of the desulfurization tower contains a large number of solid particles, mainly fly ash, calcium sulfite (CaS03 · Sweep 20), calcium sulfate (CaS04 · 2H20), the particle size is 0 ~ 400μm, 90% above is 20 ~ 60μm, the concentration is 5% to 28% (mass ratio), these solid particles (especially Al203, SiO2 particles ...
Desulfurization is a technology used to separate SO 2 from its emitting sources such as exhaust flue gases of fossil-fuel power plants, oil refineries, etc. The crucial requirement to decrease sulfur loading in fuels to nearly zero content is imposed by mandatory environmental and health protocols as well as the accurate tolerance needed for their use in fuel applications.
The desulfurization tower is a system designed to clean the exhaust gas of main and auxiliary engines with water to remove sulfides. There are many different designs on the market today, however they are mainly divided into two categories, open loop and closed loop. The power consumption of the desulfurization tower system usually accounts for ...
The utility model discloses a desulfurization and ash discharging device at the bottom of a dry flue gas desulfurization absorbing tower, which mainly comprises a screw conveyor, a flange, a double roll crusher, an air locking machine, an ejector and a Roots blower. The double roll crusher comprises a material inlet and a material outlet; the material inlet of the double roll …
