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Preparation method of ultra-fine desulfurizer slurry and device thereof

A technology for preparing devices and desulfurizers, which is applied in the field of flue gas desulfurization, can solve the problems of low desulfurization efficiency of the desulfurizer calcium utilization rate system, reduce the injection amount of desulfurizer slurry, and low reactivity of desulfurizers, so as to avoid lime activity. Reduce and solve the problem of wall sticking and fouling, and realize the effect of efficient and stable operation

Inactive Publication Date: 2007-08-01
TSINGHUA UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the desulfurizer used in the current semi-dry flue gas desulfurization has low reactivity and large particle size, which leads to poor system operation stability, low calcium utilization rate of the desulfurizer and low desulfurization efficiency of the system. A preparation method and device for superfine desulfurizer slurry are provided. The desulfurizer slurry prepared by the present invention can not only improve the calcium utilization rate of the desulfurizer particles and reduce the injection amount of the desulfurizer slurry, but also enhance the desulfurizer particles in the The suspension characteristics in the slurry are beneficial to realize the efficient and stable operation of the semi-dry desulfurization system

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  • Preparation method of ultra-fine desulfurizer slurry and device thereof
  • Preparation method of ultra-fine desulfurizer slurry and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]The following introduces the comparison experiment of desulfurizer slurry preparation using block lime and powder lime produced by Shougang Building Materials Chemical Plant as raw materials. Pour 50 kg each of block lime with a particle size of 10 to 30 mm and powdered lime with a particle size of 0.2 to 700 μm into the hydration reactor, and the CaO content in the lime is 86.5%; then, add 210 liters of water for digestion, the molar ratio of water for digestion to CaO in the lime is 15; then, the hydration reactor is placed in a static state for 15 minutes, so that the lime and water can fully carry out the hydration reaction process; then, add 75 liters of pulping water is prepared into a desulfurizer slurry with a mass concentration of 15%; at last, start the agitator 2 in the hydration reactor 1 to obtain a uniformly suspended desulfurizer slurry, and pass the desulfurizer slurry through the hydration reactor 1 and The connecting pipeline 4 between the slurry storag...

Embodiment 2

[0038] Pour 50 kg each of four block lime samples with particle diameters ranging from 1 to 10 mm, 10 to 30 mm, 30 to 60 mm and 60 to 100 mm into the hydration reactor, and the CaO content in the lime is 86.5%; Add 210 liters of water for digestion into the reactor, the molar ratio of the water for digestion to CaO in the lime is 15; then, the hydration reactor is placed in a standing state for 15 minutes, so that the lime and water can fully carry out the hydration reaction process; Add 75 liters of pulping water into the reactor to prepare desulfurizer slurry with a mass concentration of 15%. Other preparation conditions are with embodiment 1. Table 2 shows the particle size comparison results of calcium hydroxide particles in the desulfurizer slurry prepared by using four lump lime pairs with different particle size ranges. Figure 3 shows the effect of particle size distribution of calcium hydroxide particles in the desulfurizer slurry prepared by using lump limes with fou...

Embodiment 3

[0042] Pour 30 kilograms of block lime with a particle size range of 10 to 30 mm into the hydration reactor, and the CaO content in the lime is 86.5%; then, add 167 liters, 126 liters and 83 liters of digestion water to the hydration reactor respectively, The molar ratios of the digestion water to the CaO in the lime are 20, 15 and 10 respectively; then, the hydration reactor is placed in a static state for 30 minutes, so that the lime and water can fully carry out the hydration reaction process; then, add 103 liters, 45 liters and 37 liters of pulping water were used to prepare desulfurizer slurries with mass concentrations of 10%, 15% and 20%, respectively. Other preparation conditions are with embodiment 1. Table 3 shows the particle size comparison results of calcium hydroxide particles in the above three desulfurizer slurries with different mass concentrations. Figure 4 shows the effect of the particle size distribution of calcium hydroxide particles in the desulfurizer ...

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Abstract

A superfine desulfurizer slurry preparation methods and devices relates to the desulfurizer Preparation in flue gas desulfurization technology. The invention is characterized by: preparing the desulfurizer slurry using block-shaped calcarea lime materials in larger size, using local high temperature reaction heat when block-shaped calcarea lime hydrate and the volume expansion action of lime hydration to break the block-shaped calcarea lime into super-fine calcium hydrate particles. The preparation method can significantly reduce the desulfurizer particle size, not only increase calcium utilization rate of desulfurizer particles and reduce the spray volume of desulfurizer slurry, but also enhance the suspension property of desulfurizer particles in slurry; it can reach higher desulfurization efficiency under lower rate of calcium to sulfur, while increase the security and stability of system operation significantly, thereby achieves semi-dry desulfurization system highly effective and stable operation.

Description

technical field [0001] The invention relates to a semi-dry desulfurization system and process for exhausting flue gas from combustion equipment, in particular to a preparation method and device for ultrafine desulfurizer slurry, which belongs to the technical field of flue gas desulfurization. Background technique [0002] Pollutants produced by coal combustion are the largest source of pollution that causes damage to the ecological environment in my country. 90% of my country's sulfur dioxide emissions come from coal combustion, and the total emissions have exceeded 20 million tons for many years. The area of ​​acid rain accounts for about 1 / 3 of the country's land area. The control of coal-fired sulfur dioxide pollution has become an urgent task in my country's air pollution control. [0003] For the control of sulfur dioxide, limestone-gypsum wet desulfurization technology is mainly used abroad at present. Its main advantage is high desulfurization efficiency, but there ...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/80
Inventor 张颉赵素伟由长福陈昌和祁海鹰
Owner TSINGHUA UNIV
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