Method and apparatus for separating fine particles in high temperature gas through boiling bed
A technology for fine particles and high-temperature gas, which is applied to the removal of fine particles in high-temperature gases, the regeneration and separation of fine particles in high-temperature gases by ebullating beds, and the purification of high-temperature gases by ebullating beds. It can solve complex control, incomplete removal effects, and energy consumption. Large and other problems, to achieve the effect of simple working principle, small investment and low operating cost
Active Publication Date: 2018-07-27
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology
However, this method has problems such as incomplete removal effect, high energy consumption, and complicated control.
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Embodiment 1
[0063] In a 1.8 million tons / year methanol-to-olefins process, according to the method of the present invention, a fluidized bed is used to filter and purify the flue gas exhausted from the regenerator containing solid catalysts to remove residual spent catalyst particles. The specific operation The process and effect are described as follows:
[0064] 1. Material properties and related parameters
[0065] The flue gas exhausted from the regenerator of methanol to olefins is a gas-solid two-phase mixture, and the gas contains solid catalyst particles, wherein the gas is the continuous phase, and the solid catalyst is the dispersed phase medium. The exhaust gas treatment capacity is 62500Nm 3 / h, the operating temperature is 260~680℃, and the catalyst content is 60~400mg / Nm 3 , with an average particle size of 2.5 μm.
[0066] 2. Fluidized bed device
[0067] The device has a diameter of 2.5m and a height of about 6m. A cyclone separator is installed on the top of the devic...
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Abstract
The present invention relates to a method and an apparatus for separating fine particles in high temperature gas through a boiling bed, and provides a method for separating fine particles in high temperature gas through a boiling bed. The method comprises that (i) fine-particle-containing high temperature gas is driven by pressure to passes through the medium bed layer of a boiling bed; (ii) afterthe medium bed layer continuously operates until the pressure difference rises to a certain value, the high temperature gas is blown in from the bottom portion of the medium bed layer by increasing the flow rate or nitrogen can be blown in so as to boil and fluidize the bed layer, regeneration operation is performed, the gas-solid two-phase mixture containing the medium particles and the fine particles are subjected to cyclone separation, and after the regeneration is completely performed, the medium particles return to the lower-portion bed layer, and the gas carrying the fine particles is discharged; and (iii) after the medium bed layer is completely regenerated, the bed layer is switched to a normal working state, the high temperature gas is continuously filtered, and the steps (i)-(ii) are sequentially cycled. The invention further discloses an apparatus for separating fine particles in high temperature gas through a boiling bed.
Description
technical field [0001] The disclosure belongs to the field of waste gas treatment and environmental protection, and relates to a method for regenerating and separating fine particles in a fluidized bed in high-temperature gas, which is suitable for removing fine particles in high-temperature gas. Specifically, the present disclosure provides a method and device for purifying high-temperature gas with an ebullated bed. Background technique [0002] How to effectively remove dust and purify a large amount of high-temperature dust-containing gas produced in the production processes of petroleum, chemical industry, metallurgy, and electric power, so that it can meet environmental protection emission standards or recover energy, is an urgent problem in our country today. For example, in the process of coal pyrolysis and gasification, it is inevitable that a large amount of coal particles, fly ash and other substances will be entrained in the pyrolysis gas, which will have an adve...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01D46/30B01D46/42
CPCB01D46/30B01D46/78
Inventor 袁威吕文杰陈建琦马世浩李剑平付鹏波时代汪华林
Owner EAST CHINA UNIV OF SCI & TECH