CN105169945A - Supergravity pressurization oxidation regeneration method of wet oxidation desulfurization process, and special equipment thereof - Google Patents
Supergravity pressurization oxidation regeneration method of wet oxidation desulfurization process, and special equipment thereof Download PDFInfo
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- CN105169945A CN105169945A CN201510552111.8A CN201510552111A CN105169945A CN 105169945 A CN105169945 A CN 105169945A CN 201510552111 A CN201510552111 A CN 201510552111A CN 105169945 A CN105169945 A CN 105169945A
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Abstract
The present invention discloses a supergravity pressurization oxidation regeneration method of a wet oxidation desulfurization process, wherein the method comprises that: a desulfurization rich liquid and air from an air compressor respectively enter a supergravity machine, an oxidation reaction is performed in a filler, a catalyst is regenerated, the gas discharged from the supergravity machine enters a gas-liquid separation tank, mist harvesting dewatering is performed, evacuation is performed, the oxidized and regenerated catalyst solution enters a pressure stabilizing tank, the pressure stabilizing tank is communicated to the gas-liquid separation tank so as to stabilize the pressure of the supergravity machine, and the solution of the pressure stabilizing tank is extruded out through the pressure and is adopted as the regenerated solution so as to continuously react with hydrogen sulfide. According to the present invention, the oxidation rate can be significantly increased, the treatment amount is high, and the occupation area is small.
Description
Technical field:
The present invention relates to hypergravity pressure oxidation renovation process and the special equipment of Wet-type oxidation sweetening technique, be applicable to the catalyst regeneration process of various wet oxidation process.
Background technology:
Wet oxidation desulfurization is that the hydrogen sulfide absorbed by solution is oxidized to elementary sulfur and the technique separated in the liquid phase.It has, and to remove precision high, and operating flexibility is large, the features such as operating cost is low, the difference of catalyst is used according to sweetening process, Wet-type oxidation sweetening technique is divided into arsyl technique, vanadium base technique, iron-based technique three kinds, arsyl technique due to desulfuration efficiency low, less use; The representative method of vanadium base technique is ADA method, tannin process, vanadium base technique exists that Sulfur capacity is low, vanadium to shortcomings such as environments, be subject to environmental protection restriction.The representative technique of iron-based technique and Complexing Iron sulfur removal technology is as the LO-CAT technique of mrichem company, the Sulferox method etc. of Shell and Dow company exploitation, has the advantages such as nontoxic, efficient, high activity and high selectivity and is widely used due to Complexing Iron sulfur removal technology.This technique can be divided into the absorption of hydrogen sulfide and catalyst oxidation to regenerate two processes, and the solubility of hydrogen sulfide in alkali lye is comparatively large, absorbs and is easy to carry out, the selection of reactor is also more various, as LO-CAT technique absorption reactor thermally has bubble tower, packed tower, venturi, the various ways such as static mixer.And in oxidizing process, because the solubility of oxygen in Complexing Iron solution is low, the bubble tower that the liquid holdup that oxidation reactor adopts always is large, gas residence time is long, bubble tower has structure simple, stable feature, but bulky, and mass-transfer efficiency is low, constrain Complexing Iron technique miniaturized, the development of sledge dressization.
Hypergravity is Novel process strengthening device, has been applied to Complexing Iron sulfur removal technology, and Chinese patent 200710101508.0 reports a kind of method of hypergravity Complexing Iron desulfurization hydrogen sulfide, the absorber of the method adopts hypergravity, oxidator adopts bubble tower, and oxidation furnaces is huge, and efficiency is low.Chinese patent 201110076120.6 and China 201310353789.4 also report similar approach, but oxidizing process uses air to carry out at ambient pressure, and because dividing of oxygen is forced down, concentration of oxygen gas is low, causes the oxidative rate of ferrous ion low, limits the disposal ability of technique.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art and provide a kind of and the object of the invention is to overcome the deficiency of above-mentioned prior art and provide a kind of oxidation furnaces size that reduces, shorten the oxidation regeneration time, oxidation efficiency is high.Improve hypergravity pressure oxidation renovation process and the special equipment of the Wet-type oxidation sweetening technique of the treating capacity of wet oxidation-desulfurizing technique.
Object of the present invention can be reached by following measure: the hypergravity pressure oxidation renovation process of Wet-type oxidation sweetening technique, it comprises the steps:
1) sulfur removing pregnant solution and the air from air compressor enter hypergravity machine respectively, in filler, oxidation reaction occur, and by catalyst regeneration, wherein hypergravity machine pressure is not less than 0.06MPag; Air tolerance is higher than 1.2 times to 2 times of theoretical tolerance; Hypergravity machine rotating speed is between 300rmp to 2000rmp; Wherein theoretical tolerance is by the reaction equation 1/2O of iron ion and oxygen
2+ H
2o+2Fe
2+=OH
-+ 2Fe
3+calculate:
Theoretical air volume calculation formula: Q=(V*C/56/4) * 22.4/ η
Wherein Q: theoretical tolerance, unit Nm3/h;
V: the rich solution flow entering hypergravity machine, unit m3/h;
C: iron ion content in rich solution, unit g/L;
η: the oxygen in oxygen-enriched air divides rate;
Hypergravity machine gas out enters knockout drum, through catch mist dewater after emptying;
2) catalyst solution after oxidation regeneration enters vacuum tank, UNICOM between vacuum tank and knockout drum, and with the pressure of stable hypergravity machine, the solution of vacuum tank is extruded by pressure, continues to react with hydrogen sulfide as the solution after regeneration.
The hypergravity pressure oxidation reclaim equiment of Wet-type oxidation sweetening technique, it is characterized in that it comprises air compressor, air compressor connects hypergravity machine, and the gas outlet of hypergravity machine connects knockout drum, the liquid outlet of hypergravity machine connects vacuum tank, knockout drum and vacuum tank UNICOM.
The present invention can produce following good effect compared with the prior art: the method that the invention provides efficient oxidation regenerative sulfur binding rich solution under a kind of super gravity field, it is in conjunction with the feature of wet oxidation-desulfurizing and hypergravity machine, by improving the pressure of oxidative system, significantly enhance the solubility of oxygen in catalyst solution, the effect making hypergravity strengthen mass transfer gives full play to, and oxygenation efficiency increases substantially.The method not only reduces the size of oxidation furnaces, shortens the time of oxidation regeneration simultaneously, improves the treating capacity of wet oxidation-desulfurizing technique.Specifically, the present invention has the following advantages:
1, oxidation efficiency is high, and the oxygenation efficiency of single iron protoxide ion is more than 60%;
2, treating capacity is large, and the strengthening effect of mass transmitting of hypergravity and the raising of catalyst oxidation regeneration rate, increase the disposal ability of wet oxidation-desulfurizing technique.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of hypergravity pressure oxidation reclaim equiment of the present invention.
Detailed description of the invention:
Embodiment: the hypergravity pressure oxidation renovation process of Wet-type oxidation sweetening technique, it comprises the steps:
1) sulfur removing pregnant solution and the air from air compressor enter hypergravity machine respectively, in filler, oxidation reaction occur, and by catalyst regeneration, wherein hypergravity machine pressure is not less than 0.06MPag; Air tolerance is higher than 1.2 times to 2 times of theoretical tolerance; Hypergravity machine rotating speed is between 300rmp to 2000rmp.Wherein theoretical tolerance is by the reaction equation 1/2O of iron ion and oxygen
2+ H
2o+2Fe
2+=OH
-+ 2Fe
3+calculate:
Theoretical air volume calculation formula: Q=(V*C/56/4) * 22.4/ η
Wherein Q: theoretical tolerance, unit Nm3/h;
V: the rich solution flow entering hypergravity machine, unit m3/h;
C: iron ion content in rich solution, unit g/L;
η: the oxygen in oxygen-enriched air divides rate;
Hypergravity machine gas out enters knockout drum, through catch mist dewater after emptying.
2) catalyst solution after oxidation regeneration enters vacuum tank, UNICOM between vacuum tank and knockout drum, and with the pressure of stable hypergravity machine, the solution of vacuum tank is extruded by pressure, continues to react with hydrogen sulfide as the solution after regeneration.
The hypergravity pressure oxidation reclaim equiment (see Fig. 1) of Wet-type oxidation sweetening technique, it comprises air compressor 1, air compressor 1 connects hypergravity machine 2, the gas outlet of hypergravity machine 2 connects knockout drum 3, the liquid outlet of hypergravity machine 2 connects vacuum tank 3, knockout drum 3 and vacuum tank 3 UNICOM.
When carrying out oxidation regeneration, sulfur removing pregnant solution and the forced air from air compressor 1 enter hypergravity machine 2 respectively, in filler, oxidation reaction occur, by catalyst regeneration.Hypergravity machine 2 gas out enters knockout drum 3, through catch mist dewater after emptying.Catalyst solution after oxidation regeneration enters vacuum tank 4, UNICOM between vacuum tank 4 and knockout drum 3, with the pressure of stable hypergravity machine 2.The solution of vacuum tank 4 is extruded by pressure, continues to react with hydrogen sulfide as the solution after regeneration.
By changing oxygen concentration in air, and then rich solution oxidation regeneration technique is evaluated.Related data, in table 1, lists 5 kinds of working conditions in table, the data under often kind of operating mode are all the mean value of the data obtained in continuous and steady operation 48 hours situations.
The Complexing Iron catalyst that the catalyst used in the following example provides for Yantai Xin Rui Environmental Protection Technology Co., Ltd.Hypergravity machine rotating speed 1500rmp;
As can be seen from the contrast of embodiment 1 and 2,3,4,5, after the pressurizing, the oxygenation efficiency of ferrous ion significantly improves.
Desulfurizing agent in above-described embodiment can also adopt other existing desulfurizing agents containing chelates ferric ions; above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that the common engineers and technicians in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (2)
1. the hypergravity pressure oxidation renovation process of Wet-type oxidation sweetening technique, it comprises the steps:
Sulfur removing pregnant solution and enter hypergravity machine respectively from the air of air compressor, in filler, oxidation reaction occurs, by catalyst regeneration, wherein hypergravity machine pressure is not less than 0.06MPag; Air tolerance is higher than 1.2 times to 2 times of theoretical tolerance; Hypergravity machine rotating speed is between 300rmp to 2000rmp; Wherein theoretical tolerance is by the reaction equation 1/2O of iron ion and oxygen
2+ H
2o+2Fe
2+=OH
-+ 2Fe
3+calculate:
Theoretical air volume calculation formula: Q=(V*C/56/4) * 22.4/ η
Wherein Q: theoretical tolerance, unit Nm3/h;
V: the rich solution flow entering hypergravity machine, unit m3/h;
C: iron ion content in rich solution, unit g/L;
η: the oxygen in oxygen-enriched air divides rate;
Hypergravity machine gas out enters knockout drum, through catch mist dewater after emptying;
Catalyst solution after oxidation regeneration enters vacuum tank, UNICOM between vacuum tank and knockout drum, and with the pressure of stable hypergravity machine, the solution of vacuum tank is extruded by pressure, continues to react with hydrogen sulfide as the solution after regeneration.
2. the hypergravity pressure oxidation reclaim equiment of Wet-type oxidation sweetening technique, it is characterized in that it comprises air compressor (1), air compressor (1) connects hypergravity machine (2), the gas outlet of hypergravity machine (2) connects knockout drum (3), the liquid outlet of hypergravity machine (2) connects vacuum tank (3), knockout drum (3) and vacuum tank (3) UNICOM.
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Denomination of invention: Supergravity pressurization oxidation regeneration method of wet oxidation desulfurization process, and special equipment thereof Effective date of registration: 20190415 Granted publication date: 20170609 Pledgee: Yantai financing Company Limited by Guarantee Pledgor: YANTAIF SUNRISE ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO., LTD. Registration number: 2019980000068 |
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