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Simulation system and method for wet desulphurization flow fields

A technology of wet desulfurization and simulation method, which is applied in simulators, separation methods, general control systems, etc., and can solve problems such as the accuracy of CFD numerical simulation results and design feasibility.

Active Publication Date: 2016-10-12
FUJIAN LONGKING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, domestic research institutes mainly focus on the CFD numerical simulation of the spray tower and the flow field of the entire system. Influenced by factors such as boundary condition settings and grid discretization, the accuracy of CFD numerical simulation results and design feasibility still need to be improved

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  • Simulation system and method for wet desulphurization flow fields
  • Simulation system and method for wet desulphurization flow fields
  • Simulation system and method for wet desulphurization flow fields

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Embodiment 1

[0165] This embodiment provides a simulation system of a wet desulfurization flow field, including a spray tower model, an air supply system, a water supply system, an online control system, a powder feeding device and a dust removal system.

[0166] see figure 1 , figure 1 A schematic flow chart of the simulation system for the wet desulfurization flow field simulation system of the coal-fired power plant provided by the present invention,

[0167] In this embodiment, the spray tower model includes an inlet flue, a slurry tank, a tray, a spray layer, a demister and an outlet flue; wherein, in the vertical direction, the slurry tank, the inlet flue, the tray, the spray The spray layer, mist eliminator and outlet flue are arranged in sequence from bottom to top.

[0168] The air supply system includes a shaft-driven centrifugal blower, a fan frequency conversion controller, an online test device for the air supply system, and an air supply pipeline.

[0169] The water supply...

Embodiment 2

[0174] The flue gas flow rate of a 660MW coal-fired power plant wet desulfurization prototype is 1779800m under 100% BMCR condition 3 / h, the flue gas temperature is 92°C, and the flue gas density is 0.9983kg / m 3 , limestone slurry flow rate is 42000m 3 / h, the slurry density is 1140kg / m 3 ; During the model test, air simulates flue gas and water simulates limestone slurry, the air temperature is 27°C, and the air density is 1.2kg / m 3 , the water temperature is 15°C, and the water density is 998.4kg / m 3 ;The model is scaled down according to the prototype size 1:12, then the structural parameters and test parameters of the model are determined as follows:

[0175] (1) Model structure parameters

[0176] The inlet flue, outlet flue, and tower diameter of the model are reduced in proportion to the prototype size 1:12; the opening ratio of the model tray is the same as the prototype, and the partition height is the same as the prototype; the nozzles and nozzle spacing of the ...

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Abstract

The invention provides a simulation system and method for a wet desulphurization flow field. The simulation system and method aim at solving the problems that the accuracy of a CFD numerical simulation result of flow fields in a wet desulphurization spray tower is poor due to the influences of the factors of model selection, boundary condition settings, grid discretization and the like. The accuracy of the numerical simulation result and the design feasibility of the wet desulphurization spray tower are verified through a physical model test, and the simulation system can carry out verification aiming at other theoretical simulation or initial design. The physical model test serves as a basis for verifying the accuracy of the numerical simulation result and the design feasibility of the wet desulphurization spray tower, and whether the internal structure of the spray tower is reliable or not is determined through the physical model test of the flow fields. The invention further provides the simulation method for the wet desulphurization flow fields. Distribution of the flow fields in the spray tower can be simulated, and then the numerical simulation result of the wet desulphurization spray tower is verified, and the structural design of the real wet desulphurization spray tower is optimized.

Description

technical field [0001] The invention belongs to the technical field of wet desulfurization, and in particular relates to a simulation system and a simulation method of a wet desulfurization flow field, in particular to a simulation system and a simulation method of a wet desulfurization flow field of a coal-fired power plant. Background technique [0002] Wet desulfurization (WFGD) is currently the most mature and widely used flue gas desulfurization method in the world, occupying more than 80% of the flue gas desulfurization market, and is the preferred technology for flue gas desulfurization in large coal-fired power plants. The wet desulfurization process of coal-fired power plants generally uses the spray tower as the absorption tower, which is the core equipment of the flue gas desulfurization system. Arranged in such a way that the agent absorbing liquid is in countercurrent contact with the flue gas. The desulfurizer absorbing liquid is pumped to the spray layers arr...

Claims

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Application Information

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IPC IPC(8): B01D53/18G05B17/02
CPCB01D53/1481B01D53/18G05B17/02
Inventor 苏寅彪叶兴联杨丁赖晖才
Owner FUJIAN LONGKING
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