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High-capacity desulfurizing agent, and desulfurization system for circulating absorption, regeneration and utilization of desulfurizing agent

A technology of desulfurization system and desulfurization agent, which is applied in the direction of gas fuel, petroleum industry, and separation of dispersed particles, can solve the problems of difficult waste residue treatment, spontaneous combustion of desulfurization agent, and low desulfurization efficiency, so as to reduce operating costs and labor costs, reduce Power consumption of the pump and the effect of reducing the floor space

Pending Publication Date: 2019-05-07
浙江佳运能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dry desulfurization process using iron oxide as the desulfurizing agent has the following disadvantages: (1) Since the granular desulfurizing agent is laid on the ceramic ball, when the tower is loaded, the desulfurizing agent is subjected to an external force, and the powdering of the desulfurizing agent is subjected to uneven force, resulting in Inhomogeneity of the air flow channel, the air flow through the desulfurization tray will form a fixed channel instead of uniformly passing through the inside of the desulfurization agent accumulation layer, forming uneven contact, resulting in the inhomogeneity of the desulfurization reaction
The desulfurizer is easy to harden when it meets water, and the reaction is not sufficient
This results in a large difference between the actual sulfur capacity of the solid desulfurizer and the theoretical value.
[0006] (2) The reaction between solid desulfurizer and hydrogen sulfide is an exothermic reaction. If it is not properly controlled, too much oxygen will enter the tower, overheating the reaction and spontaneous combustion will occur. The tower is a closed space, and flash explosion with residual natural gas is easy. cause safety accident
[0007] (3) The site generally does not regenerate the desulfurization agent that has failed, thus causing the problem that the use efficiency of the desulfurization agent is significantly reduced
At the same time, the wetting of the water before opening the tower is not completely sufficient, and the spontaneous combustion of the desulfurizer often occurs during the tower opening and cleaning process
In addition, the cleaning and filling of the desulfurizer requires operators to enter the confined space to work, and factors such as insufficient nitrogen replacement and dust generated during filling will cause harm to the operators and cause safety accidents
[0008] (4) Waste residue treatment is difficult
[0009] To sum up, the solid desulfurizer has disadvantages such as low desulfurization efficiency, high risk of desulfurizer regeneration operation, complex operation and high risk of desulfurizer replacement, and difficult waste residue treatment.
As people's requirements for environmental protection are getting higher and higher, the use of solid desulfurizers is gradually restricted. In particular, the treatment of waste residues is generally done by stacking or deep landfill, which can no longer meet the existing needs. It is inevitable to replace its application. the trend of

Method used

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  • High-capacity desulfurizing agent, and desulfurization system for circulating absorption, regeneration and utilization of desulfurizing agent
  • High-capacity desulfurizing agent, and desulfurization system for circulating absorption, regeneration and utilization of desulfurizing agent
  • High-capacity desulfurizing agent, and desulfurization system for circulating absorption, regeneration and utilization of desulfurizing agent

Examples

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Effect test

Embodiment 1

[0040] A preparation method of a high-capacity desulfurizer, comprising the steps of:

[0041] Step 1: chelating agent B, Fe(NO 3 ) 3 9H 2 O is mixed with water to obtain a complex iron catalyst, wherein the chelating agent B is HEDTA and sodium gluconate, the mol ratio of the two is 1: 0.25, and the mol ratio of chelating agent B and Fe element is 1.5: 1, and utilize NaOH regulates the pH value of complex iron catalyst to 9.5, and the complex iron catalyst that makes total iron concentration is 4.5wt%; Step 2: get complex iron catalyst 375g, chelating agent A 238g, sulfur wetting agent 72g and stabilizer 523g was mixed and diluted with water to 6000mL, wherein the diluted liquid was adjusted to a pH value of 9.5 by KOH to make desulfurizer a;

[0042] Among them, the chelating agent A is 620 chelating agent, which can be purchased from Zhejiang Jiayun Energy Technology Co., Ltd., the sulfur wetting agent is octylphenol polyoxyethylene ether with a polymerization degree of ...

Embodiment 2

[0044] A preparation method of a high-capacity desulfurizer, comprising the steps of:

[0045] Step 1: chelating agent B, FeCl 3 ·6H 2 O is mixed with water to obtain a complex iron catalyst, wherein the chelating agent B is EDTA and sodium gluconate, the mol ratio of the two is 1: 0.5, the mol ratio of chelating agent B and Fe element is 1: 1, and utilize Ammonia liquor regulates the pH value of complexed iron catalyst to 8.5, and the complexed iron catalyst that makes total iron concentration is 3wt%;

[0046] Step 2: Mix 1250g of chelated iron catalyst, 790g of chelating agent A, 152g of sulfur wetting agent and 1540g of stabilizer, and dilute to 6000mL with water, wherein the diluent is adjusted to pH 8.5 by sodium methoxide to make desulfurizer b.

[0047] Among them, the chelating agent A is 620 chelating agent, the sulfur wetting agent is dodecylphenol polyoxyethylene ether and nonyl polyoxyethylene ether mixed at a mass ratio of 1:1, and the stabilizer is potassium c...

Embodiment 3

[0049] A preparation method of a high-capacity desulfurizer, comprising the steps of:

[0050] Step 1: chelating agent B, Fe 2 SO 4 Mix with water to obtain a complex iron catalyst, wherein the chelating agent B is HEDP and sulfosalicylic acid, the molar ratio of the two is 1: 1, the mol ratio of the chelating agent B to the Fe element is 2: 1, and Utilize NaOH to adjust the pH value of complex iron catalyst to 7.5, make the complex iron catalyst that total iron concentration is 6wt%;

[0051] Step 2: Mix 2500g of complex iron catalyst, 1500g of chelating agent B, 114g of sulfur wetting agent and 105g of stabilizer, and dilute to 6000mL with water, wherein the diluent is adjusted to pH 6.5 with ammonia water to make desulfurizer c.

[0052] Wherein, the chelating agent A is 620 chelating agent, and the sulfur wetting agent is a small molecule alcohol, which is obtained by mixing ethanol and propanol with a volume ratio of 1:1, and the stabilizing agent is sodium sulfite.

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Abstract

The invention discloses a high-capacity desulfurizing agent, and relates to the field of natural gas desulfurization. The high-capacity desulfurizing agent comprises, by mass, 30-300 parts of chelatediron, 20-80 parts of a chelating agent A, 7-15 parts of a sulfur lubricant and 50-150 parts of a stabilizer, and the pH value is controlled to be 6.5-10.5. The desulfurizing agent has the advantagesof high sulfur capacity, strong desulfurization effect and long service life, and effectively meets the desulfurization effect of natural gas. A desulfurization system also disclosed in the inventionhas the advantages of simplicity in operation, low device cost and high safety factor, and is suitable for being promoted and used.

Description

technical field [0001] The invention relates to the field of natural gas desulfurization, in particular to a high-capacity desulfurization agent and a desulfurization system using the desulfurization agent for cyclic absorption and regeneration. Background technique [0002] As a clean energy, natural gas is widely used in the chemical industry and civilian use. Natural gas contains hydrogen sulfide, mercaptans, heavy hydrocarbon gas, saturated water and other impurities. Hydrogen sulfide in natural gas meets water to form weak acid. The existence of weak acid will cause corrosion of steel and other equipment and pipelines. In addition, if the natural gas containing hydrogen sulfide is used as civil fuel, the exhaust gas generated after the combustion of natural gas will contain sulfide, and the sulfide will also pollute the environment and endanger human health. Therefore, it is first necessary to remove the hydrogen sulfide in the extracted natural gas to meet the require...

Claims

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Application Information

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IPC IPC(8): C10L3/10B01D53/18B01D53/14
Inventor 赵梅芳宋成举冷华春李晓博仇晨
Owner 浙江佳运能源技术有限公司
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