CN111346490B - Polyacid-based green desulfurization system, desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen byproduct method, system and application - Google Patents
Polyacid-based green desulfurization system, desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen byproduct method, system and application Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
- B01D53/965—Regeneration, reactivation or recycling of reactants including an electrochemical process step
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention relates to a polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic circulating desulfurization byproduct hydrogen production method, a system and application. The regenerated polyacid water solution in the anode chamber is pumped back into the glass reactor by a water pump with specific power through the upper branch pipe of the glass reactor at the same flow rate, and the total solution amount in the glass reactor is kept unchanged in the process of treatment and regeneration. The method realizes continuous cycle of hydrogen sulfide removal of the green desulfurization aqueous solution of the polyacid and regeneration of the green desulfurization aqueous solution of the polyacid, and generates hydrogen. Is beneficial to industrialized popularization.
Description
Technical Field
The invention belongs to the technical field of atmospheric pollutant control, and particularly relates to an electrochemical regeneration circulating desulfurization method for a green desulfurization system based on polyacid while desulfurization and regeneration.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Hydrogen sulfide is an acid gas which is combustible, has an extremely low olfactory threshold, is colorless and has high toxicity, and has a strong odor egg flavor at a low concentration and a sulfur flavor at an extremely low concentration. Hydrogen sulfide is rarely used in most industrial processes, but is often an intermediate or final product of chemical reactions and natural decomposition of proteins, or is contaminated with gas mixtures and appears as an impurity. The industries involving hydrogen sulfide are generally municipal sewage treatment, paper processing plants, petrochemical plants, fiber processing plants, and the preparation of some chemical raw materials, among others. In many industrial processing procedures, the existence of hydrogen sulfide reduces the service life of equipment, greatly increases the operating cost of enterprises, can cause the poisoning loss activity of additives in the operating process, mixes the additives with air into mixed gas with certain concentration, can cause explosion in the high-temperature environment, and also causes great life threat to operators and surrounding residents. The absorption of hydrogen sulfide can be divided into two major categories, dry desulfurization and wet desulfurization. The dry desulfurization has the characteristics of mature process, simple equipment operation and good equipment durability, but the desulfurization agent cannot be continuously used due to low sulfur capacity, poor durability of the desulfurization agent, non-repeated regeneration or complex repeated regeneration process and low regeneration yield, thereby polluting the environment and greatly increasing the desulfurization cost of enterprises. Mainly comprises other dry desulfurization processes such as carbon-based adsorption desulfurization, molecular sieve adsorption desulfurization, metal oxide oxidation desulfurization, membrane method desulfurization, Claus method conversion desulfurization and the like. The wet desulfurization is generally to pass hydrogen sulfide gas through an aqueous solution containing a desulfurizing agent, and the hydrogen sulfide is converted into elemental sulfur by using the desulfurizing agent, wherein the aqueous solution of the desulfurizing agent can be repeatedly recycled, and the desulfurization performance is reduced less or is better than that of the original untreated aqueous solution of the desulfurizing agent. Mainly comprises novel wet desulphurization processes such as chemical oxidation desulphurization, alcohol amine solution absorption desulphurization, biological desulphurization, ionic liquid and the like.
The polyoxometalates are also called polyoxometalates, and also metal oxygen cluster compounds. Mainly divided into isopoly compounds and heteropoly compounds. The heteropoly compound consists of hetero atom, counter ion and crystal water. The classification of polyacids is based on the presence or absence of heteroatoms, the ratio of heteroatoms to heteroatoms, and the structural type of the heteroatoms. Heteropoly compounds have been in the past 200 years, and with the development of technology, some polyacid have been found to have high activity, high selectivity, high stability, and recyclability. Further, heteropoly compounds are used in many catalytic fields in chemical industry.
The traditional method for absorbing hydrogen sulfide and regenerating the desulfurization solution by the polyacid aqueous solution is to take out the desulfurization solution after the polyacid aqueous solution is saturated by absorbing hydrogen sulfide, transfer the desulfurization solution into an electrolytic cell, and realize regeneration by changing the anionic valence of the polyacid from low to high, but the inventor finds that: the method has long regeneration time and low efficiency, and cannot keep the optimal desulfurization effect for a long time, the regeneration of the hydrogen sulfide absorbed by the polyacid aqueous solution and the desulfurization solution is carried out separately, and the hydrogen sulfide is absorbed after the desulfurization solution is regenerated, so that the desulfurization time is greatly prolonged, the continuous desulfurization cannot be carried out, and the desulfurization cost is increased. In addition, the method has some risks of irregular operation and is easy to cause secondary pollution.
Disclosure of Invention
In order to overcome the defects, the invention provides an electrochemical regeneration circulating desulfurization method for desulfurizing and regenerating a green desulfurization system based on polyacid. Under the condition that the desulfurization process and the regeneration process are synchronously carried out, the invention not only prolongs the optimal desulfurization time, but also has no reduction of the desulfurization performance compared with the prior desulfurization solution, and is superior to the desulfurization performance of the traditional desulfurization-regeneration process.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic cyclic desulfurization byproduct hydrogen gas system, which comprises: a reactor, an electrolytic cell; the electrolytic cell is divided into an anode chamber and a cathode chamber, and a liquid circulation pipeline and a liquid conveying device are arranged between the anode chamber and the reactor.
The electrochemical regeneration circulating desulfurization system for the green polyacid desulfurization system can absorb hydrogen sulfide and regenerate polyacid aqueous solution synchronously, the absorbed polyacid aqueous solution flows into an electrolytic cell through a lower branch pipe of a glass reactor, a pair of inert electrodes are arranged in the electrolytic cell, two leads are respectively connected with a positive electrode and a negative electrode of a direct current power supply, the polyacid aqueous solution in a synchronous anode chamber flows into the glass reactor through an upper branch pipe, and then the hydrogen sulfide and the regenerated polyacid aqueous solution can be absorbed synchronously and can be generated in a cathode chamber.
The polyacid salt aqueous solution of the invention can be used as an oxidation desulfurizer and can be used in a plurality of catalysis and synthesis fields. The specific method comprises the following steps: dissolving a polyacid salt with a certain concentration in distilled water with a certain volume, placing the solution in a glass reactor, placing the glass reactor in a constant water bath, controlling the reaction temperature, enabling a synchronous polyacid aqueous solution to flow into an electrolytic cell through a lower branch pipe according to a certain flow, regenerating the polyacid aqueous solution through the electrolytic cell, enabling the polyacid aqueous solution to flow into the glass reactor through an upper branch pipe according to a certain flow, introducing a hydrogen sulfide mixed simulation gas with a certain content, enabling the mixed gas after the polyacid aqueous solution absorbs the hydrogen sulfide to flow into a hydrogen sulfide analyzer, measuring the hydrogen sulfide content after the polyacid aqueous solution absorbs, and discharging tail gas after the analyzer into air after the tail gas is absorbed by a sodium hydroxide solution. After a period of time, the content of hydrogen sulfide in the tail gas is continuously increased, and the reading of the hydrogen sulfide analyzer is continuously increased. Hydrogen is generated at the cathode of the electrolytic cell while the polyacid salt absorbs hydrogen sulfide and regenerates the polyacid aqueous solution.
In a second aspect of the invention, a polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic cyclic desulfurization method for producing hydrogen as a byproduct are provided, which comprises the following steps:
introducing the gas containing hydrogen sulfide into the polyacid solution for absorption;
meanwhile, part of the polyacid salt solution which has absorbed the hydrogen sulfide is subjected to electrolytic regeneration and then recycled for treatment of the gas containing the hydrogen sulfide.
The desulfurization principle of the invention is as follows: in the polyacid salt aqueous solution, polyacid anions and hydrogen sulfide molecules and hydrogen sulfide radicals entering the aqueous solution undergo redox reaction, molybdenum atoms are reduced, and the hydrogen sulfide molecules and the hydrogen sulfide radicals are oxidized into elemental sulfur.
The regeneration principle of the invention is as follows: during the desulfurization process, a pair of inert electrodes is arranged in an electrolytic cell, the cathode is connected with the cathode, the anode is connected with the anode to form a closed passage, direct current is introduced by a direct current stabilized power supply, molybdenum atoms of the polyacid lose electrons at the anode and are oxidized, and hydrogen ions obtain electrons at the cathode and are reduced into hydrogen. In the external circuit, electrons lost by molybdenum atoms around the anode enter the positive electrode of the power supply, and the negative electrode provides electrons to hydrogen ions of the cathode to become hydrogen gas. In the internal circuit, anions of the anode compartment polyacid salt are adjacent to the anode, and hydrogen ions in the cathode compartment are adjacent to the cathode. The inner and outer circuits form a closed path, so that the regeneration of the anode polyacid salt aqueous solution is completed, and hydrogen is generated at the cathode.
In a third aspect of the invention there is provided the use of any of the above systems in municipal sewage treatment, paper industry processing plants, petrochemical plants, fibre processing plants and the preparation of chemical raw materials. The industry generates a certain amount of hydrogen sulfide in the production process, which is harmful to the environment and equipment, so that the system and the method are expected to well solve the problem.
The invention has the beneficial effects that:
(1) the invention prepares a desulfurized polyacid salt which is used for absorbing hydrogen sulfide in mixed gas. The preparation method is simple, the desulfurization effect is good, the reaction is stable, the cyclic utilization can be realized, and the elemental sulfur can be obtained. On the basis of the traditional desulfurization and regeneration device, a regeneration circulation method for synchronously and continuously performing the desulfurization process and the regeneration process is invented. The optimum desulfurization time is prolonged, and simultaneously, the desulfurization performance is not reduced compared with the original desulfurization solution, and is also superior to the conventional desulfurization-regeneration desulfurization performance. The electrochemical regeneration circulation desulfurization method based on the polyacid green desulfurization system and capable of desulfurizing and regenerating simultaneously can synchronously and continuously carry out desulfurization and regeneration of desulfurization solution, not only can recover sulfur simple substances, but also can generate hydrogen, lowers the desulfurization cost of enterprises, reduces the desulfurization time, increases the desulfurization efficiency, prolongs the optimal desulfurization effect time, has simple process and low energy consumption, and is easy for industrial popularization.
(2) The method has the advantages of simple operation method, low cost, universality and easy large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic cyclic desulfurization byproduct hydrogen gas system;
wherein, 1, a glass reactor; an H-type electrolytic cell; 3. an anode chamber; 4. a cathode chamber; 5. a lower branch pipe; 6. an upper branch pipe.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
An electrochemical regeneration circulation desulfurization method for desulfurizing and regenerating a green desulfurization system based on polyacid is obtained by adopting a device for synchronously carrying out a desulfurization process and a regeneration process.
In some embodiments, the electrolytic cell is an H-type electrolytic cell to achieve the synchronization of desulfurization and regeneration using a dual chamber design of an H-type electrolytic cell.
In some embodiments, the cathode and anode of the electrolytic cell are connected to the positive and negative electrodes of a dc power source, respectively, to provide the electrons required for the electrochemical reaction.
In some embodiments, the cathode chamber is connected to a gas collection device to recover the generated hydrogen gas for storage or direct use as feed gas for other processes.
The material of the reactor is not particularly limited in this application, and in some embodiments, the reactor is made of a corrosion-resistant material, such as glass, teflon, or the like, so as to obtain a better corrosion-resistant effect.
In order to better control the reaction, in some embodiments, the reactor is further provided with a temperature control device to realize the synchronization of desulfurization and regeneration through temperature regulation.
In some embodiments, the reactor is further connected with a gas analyzer, and the smooth and orderly proceeding of each reaction is ensured through real-time monitoring of gas components and contents.
The invention also provides a polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic cyclic desulfurization byproduct hydrogen production method, which comprises the following steps:
introducing the gas containing hydrogen sulfide into the polyacid solution for absorption;
meanwhile, part of the polyacid salt solution which has absorbed the hydrogen sulfide is subjected to electrolytic regeneration and then recycled for treatment of the gas containing the hydrogen sulfide.
In some embodiments, the polyacid salt has the general structural formula:
[Himi]2SMo12O40·[imi]2·H2O；[Himi]3PMo12O40·[imi]3·H2O；[Himi]4GeMo12O40·[imi]4·H2O。
in some embodiments, the setting parameters of the device are: the flow rate of the gas containing hydrogen sulfide is 100mL/min, the flow rate of the lower branch pipe is 1mL/min, the flow rate of the upper branch pipe is 1mL/min, the direct current intensity is 0.01-0.15A,
in some embodiments, the removal of hydrogen sulfide from the aqueous polyacid salt solution and the regeneration of the aqueous polyacid salt solution are performed simultaneously.
In some embodiments, the polyacid salt has the general structural formula:
[Himi]2SMo12O40·[imi]2·H2O；[Himi]3PMo12O40·[imi]3·H2O；[Himi]4GeMo12O40·[imi]4·H2O；
in some embodiments, the polyoxometallate is:
[Himi]2SMo12O40·[imi]2·H2an aqueous solution of O; [ Himi]3PMo12O40·[imi]3·H2An aqueous solution of O; [ Himi]4GeMo12O40·[imi]4·H2An aqueous solution of O;
in some embodiments, the concentration of the aqueous polyacid salt solution is from 0.001 to 0.002 mol/L.
The invention provides a polyacid salt aqueous solution for removing hydrogen sulfide, which is prepared by dissolving polyacid salt in distilled water. The synchronous continuous desulfurization regeneration can be realized through the circulating system, and hydrogen is generated at the cathode of the electrolytic cell.
The preparation method of the polyacid salt for removing hydrogen sulfide comprises the following steps:
(1)[Himi]2SMo12O40·[imi]2·H2preparation of O:
0.30g of molybdic acid (1.84mmol), 0.06g of imidazole (0.93mmol) and 0.02g of sodium sulfate (0.12mmol) were weighed, 10ml of distilled water was added to the mixture, stirred at 80 ℃ for about 20min, placed in a 25ml stainless steel reaction vessel lined with polytetrafluoroethylene, allowed to cool naturally after keeping the temperature at 100 ℃ for 1 day, filtered, and washed with distilled water to obtain the objective crystals.
(2)[Himi]3PMo12O40·[imi]3·H2Preparation of O
0.204g (0.003mol) of imidazole was weighed out and dissolved in 50ml of deionized water, and the solution was added dropwise to 30ml of deionized water containing 1.825g (0.001mol) of phosphomolybdic acid to form a yellow precipitate. Stirring for 2 hours at room temperature, filtering, repeatedly washing a filter cake by deionized water, and drying at 100 ℃ overnight.
(3)[Himi]4GeMo12O40·[imi]4·H2Preparation of O
0.2723g (0.004mol) of imidazole was weighed out and dissolved in 50ml of deionized water, and the solution was added dropwise to 30ml of deionized water containing 1.867g (0.001mol) of phosphomolybdic acid to form a yellow precipitate. Stirring for 2 hours at room temperature, filtering, repeatedly washing a filter cake by deionized water, and drying at 100 ℃ overnight.
0.0979g to 0.1034g of the polyacid salt were dissolved in 50ml of distilled water, and were used for the hydrogen sulfide removal experiment.
The concentration of the polyacid salt aqueous solution is 0.001-0.002mol/L, and the volume is 50 ml.
The glass reactor is a glass tube with a sand core at the bottom.
The carrier gas of the mixed simulation gas containing hydrogen sulfide is N2The flow rate is 100ml/min, the concentration of hydrogen sulfide is 1500-3。
The reaction temperature is 28-75 ℃.
The direct current intensity is 0.01-0.15A.
The flow rate of the lower branch pipe is 1mL/min
The sulfur speed of the upper branch pipe is 1mL/min
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
EXAMPLE 1 preparation of an aqueous solution of a polyacid salt
0.001mol/L [ Himi ]]2SMo12O40·[imi]2·H2Preparation of O aqueous solution
0.0979g of prepared [ Himi ] was weighed]2SMo12O40·[imi]2·H2O, dissolving in 50ml of distilled water.
(II) 0.001mol/L [ Himi]3PMo12O40·[imi]3·H2Preparation of O aqueous solution 0.0979g of prepared [ Himi ] was weighed]3PMo12O40·[imi]3·H2O, dissolving in 50ml of distilled water.
(III) 0.001mol/L [ Himi]4GeMo12O40·[imi]4·H2Preparation of O aqueous solution
0.1034g of prepared [ Himi ] were weighed]4GeMo12O40·[imi]4·H2O, dissolving in 50ml of distilled water.
(IV) 0.002mol/L [ Himi]2SMo12O40·[imi]2·H2Preparation of O aqueous solution
0.2068g of prepared [ Himi ] were weighed]2SMo12O40·[imi]2·H2O, dissolving in 50ml of distilled water.
Experimental example 2 simulation of hydrogen sulfide mixed gas
50ml of 0.001mol/L [ Himi ]]2SMo12O40·[imi]2·H2Pouring the O aqueous solution into a glass reactor, pouring another 50ml into an anode chamber of an electrolytic cell, synchronously absorbing and regenerating, wherein the reaction temperature is 25 ℃, the flow of introduced mixed gas is 100ml/min, and the concentration of hydrogen sulfide is 1500mg/m3Hydrogen sulfide mixture ofThe hydrogen sulfide contained in the synthesized gas and the tail gas is measured by a hydrogen sulfide analyzer. The tail gas is finally absorbed and treated by sodium hydroxide solution. The absorption efficiency of the hydrogen sulfide is kept above 95 percent within 60 min.
Experimental example 3 simulation of hydrogen sulfide mixed gas
50ml of 0.001mol/L [ Himi ]]3PMo12O40·[imi]3·H2Pouring the O aqueous solution into a glass reactor, pouring another 50ml into an anode chamber of an electrolytic cell, synchronously absorbing and regenerating, wherein the reaction temperature is 25 ℃, the flow of introduced mixed gas is 100ml/min, and the concentration of hydrogen sulfide is 1500mg/m3The hydrogen sulfide contained in the tail gas of the hydrogen sulfide mixed gas is measured by a hydrogen sulfide analyzer. The tail gas is finally absorbed and treated by sodium hydroxide solution. The absorption efficiency of the hydrogen sulfide is kept above 43 percent within 60 min.
Experimental example 4 simulation of hydrogen sulfide mixed gas
50ml of 0.001mol/L [ Himi ]]4GeMo12O40·[imi]4·H2Pouring the O aqueous solution into a glass reactor, pouring another 50ml into an anode chamber of an electrolytic cell, synchronously absorbing and regenerating, wherein the reaction temperature is 25 ℃, the flow of introduced mixed gas is 100ml/min, and the concentration of hydrogen sulfide is 1500mg/m3The hydrogen sulfide contained in the tail gas of the hydrogen sulfide mixed gas is measured by a hydrogen sulfide analyzer. The tail gas is finally absorbed and treated by sodium hydroxide solution. The hydrogen sulfide absorption efficiency is kept above 53% within 60 min.
Experimental example 5 simulation of hydrogen sulfide mixed gas
50ml of 0.002mol/L [ Himi ]]2SMo12O40·[imi]2·H2Pouring the O aqueous solution into a glass reactor, pouring another 50ml into an anode chamber of an electrolytic cell, synchronously absorbing and regenerating, wherein the reaction temperature is 25 ℃, the flow of introduced mixed gas is 100ml/min, and the concentration of hydrogen sulfide is 2000mg/m3The hydrogen sulfide contained in the tail gas of the hydrogen sulfide mixed gas is measured by a hydrogen sulfide analyzer. The tail gas is finally absorbed and treated by sodium hydroxide solution. The solution color is changed, and the hydrogen sulfide absorption efficiency is kept above 100% within 60 min.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. A polyacid-based green desulfurization system and a desulfurization-electrochemical regeneration synergistic cyclic desulfurization byproduct hydrogen gas system are characterized by comprising: a reactor, an electrolytic cell; the electrolytic cell is divided into an anode chamber and a cathode chamber, and a liquid circulation pipeline and a liquid conveying device are arranged between the anode chamber and the reactor; the specific method comprises the following steps:
introducing the gas containing hydrogen sulfide into the polyacid solution for absorption;
meanwhile, part of the absorbed hydrogen sulfide-containing polyacid solution is subjected to electrolytic regeneration and then is circularly used for treating the hydrogen sulfide-containing gas; the structural general formula of the polyacid salt is as follows:
[Himi]2SMo12O40·[imi]2·H2O。
2. the polyacid-based green desulfurization system and desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen production gas system according to claim 1, wherein the electrolytic cell is an H-type electrolytic cell.
3. The polyacid-based green desulfurization system and desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen production system according to claim 1, wherein the cathode and the anode of the electrolytic cell are respectively connected with the anode and the cathode of a direct current power supply.
4. The green polyacid-based desulfurization system and desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen production byproduct system as claimed in claim 1, wherein said cathode chamber is connected with a gas collection device.
5. The polyacid-based green desulfurization system and desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen production byproduct system as claimed in claim 1, wherein the reactor is made of glass or polytetrafluoroethylene.
6. The green polyacid-based desulfurization system and desulfurization-electrochemical regeneration cooperative recycling desulfurization hydrogen production system according to claim 1, wherein the reactor is further provided with a temperature control device.
7. The green polyacid-based desulfurization system and desulfurization-electrochemical regeneration synergistic cyclic desulfurization hydrogen production gas system as claimed in claim 1, wherein said reactor is further connected with a gas analyzer.
8. A method for the polyacid-based green desulfurization system and the desulfurization-electrochemical regeneration synergistic cyclic desulfurization byproduct hydrogen system, which is based on any one of claims 1 to 7, is characterized by comprising the following steps:
introducing the gas containing hydrogen sulfide into the polyacid solution for absorption;
meanwhile, part of the polyacid salt solution which has absorbed the hydrogen sulfide is subjected to electrolytic regeneration and then recycled for treatment of the gas containing the hydrogen sulfide.
9. Use of the system of any one of claims 1 to 7 in municipal sewage treatment, paper industry processing plants, petrochemical plants, fiber processing plants and the preparation of chemical raw materials.
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