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A coupled symbiotic double-alkali flue gas desulfurization method

A flue gas, double alkali technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of high cost and poor desulfurization effect of desulfurizing agents, and achieve lower operating costs, significant environmental protection value and economy. Benefit, the effect of solving water balance problems

Inactive Publication Date: 2016-12-07
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Acetylene is a gas obtained by contacting calcium carbide (CaC2) with water, and also obtains calcium hydroxide slightly soluble precipitated slag, namely calcium carbide slag; at present, the raw material technology of using calcium carbide slag in the production of flue gas desulfurization system has been studied , such as the patent document CN201110164225.7 "A Method for Using Carbide Slag to Produce a Desulfurizer", which directly uses calcium carbide slag to process and produce a desulfurizer; Wet flue gas desulfurization process" adopts hydrogen peroxide redox treatment, and then uses it for flue gas desulfurization treatment. The desulfurization effect is not good, and the cost is also high

Method used

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  • A coupled symbiotic double-alkali flue gas desulfurization method

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Effect test

Embodiment 1

[0023] Such as figure 1 Shown, a kind of coupled symbiotic double-alkali flue gas desulfurization method comprises the following steps:

[0024] (1) Calcium carbide pretreatment: place calcium carbide 17 in crusher 18 and pulverize into powder with particle size≤3mm, and after passing through 130 mesh sieves, place it in storage bin 19 for use;

[0025] (2) Acetylene generation: the calcium carbide powder in the storage bin 19 in step 1) is discharged in the acetylene generator 16 through the buffer bin 20, the water and the calcium carbide powder are 1.1 according to the mass ratio, and the gas phase of the acetylene generator 16 is controlled The temperature of the part is 95°C, the temperature of the liquid phase part is 100°C, and the pressure of the entire acetylene generating device 16 is controlled to be 6kpa, and the stirring speed is adjusted to be 45r / min, and the gas in the acetylene generating device 16 is discharged from the top of the device. into the washing to...

Embodiment 2

[0031] Such as figure 1 Shown, a kind of coupled symbiotic double-alkali flue gas desulfurization method comprises the following steps:

[0032] (1) Calcium carbide pretreatment: place calcium carbide 17 in crusher 18 and pulverize into powder with particle size≤3mm, and after passing through 120 mesh sieves, place it in storage bin 19 for use;

[0033] (2) Acetylene generation: the calcium carbide powder in the storage bin 19 in step 1) is discharged in the acetylene generator 16 through the buffer bin 20, the water and the calcium carbide powder are 0.85 according to the mass ratio, and the gas phase of the acetylene generator 16 is controlled The temperature of the part is 88°C, the temperature of the liquid phase part is 90°C, and the pressure of the entire acetylene generating device 16 is controlled to be 4kpa, and the stirring speed is adjusted to be 30r / min, and the gas in the acetylene generating device 16 is discharged from the top of the device. into the washing to...

Embodiment 3

[0039] Such as figure 1 Shown, a kind of coupled symbiotic double-alkali flue gas desulfurization method comprises the following steps:

[0040] (1) Calcium carbide pretreatment: place calcium carbide 17 in crusher 18 and pulverize into powder with particle size≤3mm, and after passing through 140 mesh sieve, place it in storage bin 19 for use;

[0041] (2) Acetylene generation: the calcium carbide powder in the storage bin 19 in step 1) is discharged in the acetylene generator 16 through the buffer bin 20, the water and the calcium carbide powder are 1.2 according to the mass ratio, and the gas phase of the acetylene generator 16 is controlled The temperature of the part is 100°C, the temperature of the liquid phase part is 110°C, and the pressure of the entire acetylene generating device 16 is controlled to be 7kpa, and the stirring speed is adjusted to be 70r / min, and the gas in the acetylene generating device 16 is discharged from the top of the device. into the washing to...

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Abstract

The invention relates to the technical field of flue gas desulfurization, and in particular relates to a desulphurization method of coupled symbiosis dual-alkali flue gas. The method comprises the steps of coupling an acetylene generation device and a flue gas desulfurization device, and enabling the alkali produced in the acetylene generation device to perform an exchange reaction with the alkali produced in the flue gas desulfurization system to prevent the flue gas desulfurization system from being blocked and recycle the desulphurization stock solution in the flue gas desulfurization system; therefore, the cost of flue gas desulfurization treatment is lowered, and the desulphurization method has remarkable environmental value and economic benefit.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to a coupled symbiotic double-alkali flue gas desulfurization method. Background technique [0002] The discharge of sulfur dioxide in nature will cause serious environmental pollution. At present, my country's sulfur dioxide discharge has reached more than 20 million tons per year, and the area of ​​acid rain has reached more than one-third of the country's land area. Therefore, acid rain has become a constraint An important factor for the rapid development of my country's economic crops and economy. For this reason, the country has carried out a large amount of control on the emissions of sulfur dioxide and nitrogen oxides. And for the production process of industrial factories and mines, industrial factories and mines are required to purify the waste gas and residue generated to prevent a large amount of waste from being discharged into the natural environment and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 潘玉宝钟后国陈杰黄明军陈义邹模吴永乘资太春
Owner GUIZHOU KAILIN GRP CO LTD
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