CN105731386A - System for preparing sulfur from metallurgical off-gas - Google Patents
System for preparing sulfur from metallurgical off-gas Download PDFInfo
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- CN105731386A CN105731386A CN201610029380.0A CN201610029380A CN105731386A CN 105731386 A CN105731386 A CN 105731386A CN 201610029380 A CN201610029380 A CN 201610029380A CN 105731386 A CN105731386 A CN 105731386A
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- bed reactors
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
Abstract
The invention provides a system for preparing sulfur from metallurgical off-gas. The system comprises a purifying device and multiple fixed-bed reactors in series connection, wherein each fixed-bed reactor is provided with a reducing agent raw material inlet, a process gas outlet and a sulfur outlet; a catalyst storage member is arranged in the fixed-bed reactor; the first-level fixed-bed reactor of the fixed-bed reactors in series connection is provided with a sulfur inlet, and the second-level fixed-bed reactor of the fixed-bed reactors in series connection is provided with a sulfur dioxide gas inlet; the sulfur dioxide gas inlet is connected with a sulfur dioxide gas outlet of the purifying device; and the reducing agent raw material inlet of the next-level fixed-bed reactor of the fixed-bed reactors in series connection is connected with the process gas outlet of the last-level fixed-bed reactor. By adopting the method for preparing sulfur from metallurgical off-gas provided by the invention, the knotty problems in the storage and transport of sulfuric acid in the acid production industry can be effectively solved.
Description
Technical field
The invention belongs to antacid field, specifically, the present invention relates to the system that flue gas during smelting is prepared into sulfur.
Background technology
Sulphuric acid is strong due to corrosivity, and in existing antacid engineering, the storage about product sulphuric acid is that row insider compares the difficult problem paid close attention to and be not easily solved.Through various economic comparisons, making solid sulfur is best solution.Directly do solid sulfur if, with flue gas during smelting, exhaust gas volumn is big, and equipment is huge, and oxygen, noble gas component height in flue gas, operating cost is too high.In general flue gas during smelting, SO2 concentration is approximately in about 6～15%, adopts oxygen-rich smelting, and so2 concentration in flue gas is up to 25%.But owing to the oxygen content in flue gas during smelting is too high, the process of SO2 reduction can consume a large amount of reducing agent, increase operating cost；In flue gas, other noble gases are too many simultaneously, and general reduction reaction temperature is all at about 1000 DEG C, and heating these noble gases needs big energy；Owing to exhaust gas volumn is too big, equipment direct investment is also big.
It is thus desirable to develop new technique to solve the preparation of solid sulfur.
Summary of the invention
It is contemplated that one of technical problem solved to a certain extent in correlation technique.For this, it is an object of the present invention to propose a kind of system that flue gas during smelting is prepared into sulfur, system solves the problem and traditional directly prepared into the problem that the sulphuric acid that sulphuric acid brings not easily is laid in and not easily transported by flue gas during smelting.
According to one aspect of the invention, the invention allows for a kind of system that flue gas during smelting is prepared into sulfur, including:
Purifying plant, described purifying plant has flue gas during smelting entrance, absorption liquid entrance, steam inlet and sulfur dioxide gas outlet；
Multiple fixed bed reactors of series connection, the plurality of fixed bed reactors are respectively provided with reducing agent feed(raw material)inlet, process gas outlet and sulfur outlet, catalyst storaging piece it is provided with in the plurality of fixed bed reactors, first order fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur entrance, second level fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur dioxide gas entrance, described sulfur dioxide gas entrance exports with the sulfur dioxide gas of described purifying plant and is connected, the reducing agent feed(raw material)inlet being positioned on subordinate's fixed bed reactors in multiple fixed bed reactors of described series connection is connected with the process gas outlet on upper level fixed bed reactors.
Utilize the method that flue gas during smelting can directly be prepared into the sulfur of easily storage effectively, thus avoid the problem that directly deposit sulphuric acid brings.Further, since sulphuric acid belongs to hazardous chemical product, being not suitable for long-distance transportation, there is very strong regionality in its market.Once sulphuric acid is unsalable, it will cause the stopping production of upstream smelting system.Therefore, flue gas during smelting is directly prepared into sulfur by the method that flue gas during smelting is prepared into sulfur of the above embodiment of the present invention, is easier to long-distance transportation compared to conventional liquid concentrated sulphuric acid product.
According to some embodiments of the present invention, described purifying plant includes: absorption tower, regenerator, pump and reboiler, described regenerator is connected with described absorption tower, described pump is connected with described regenerator respectively with reboiler, described absorption tower is suitable for use with organic solvent and absorbs the sulfur dioxide in described flue gas during smelting, obtains the absorption liquid containing sulfur dioxide；Described regenerator is suitable for use with low-pressure steam and the described absorption liquid containing sulfur dioxide is carried out desorbing, in order to obtain described sulfur dioxide gas.
According to some embodiments of the present invention, described absorption tower and regenerator are packed tower, and described pump is noncorrosive pump, and described reboiler is shell-and-tube heat exchanger.
According to some embodiments of the present invention, described absorption tower is connected with organic solvent storage tank.Organic solvent thus can be adopted to absorb the sulfur dioxide in described flue gas during smelting, and then flue gas during smelting is purified.
According to some embodiments of the present invention, described reducing agent feed(raw material)inlet is connected with in natural gas storage tank, water gas storage tank, coal storage tank and coke storage tank.The one in natural gas, water gas, coal and the coke passed into thus can be utilized to obtain hydrogen sulfide gas with sulfur reaction, and then hydrogen sulfide gas is generated sulfur as reducing agent with sulfur dioxide gas precursor reactant.
According to some embodiments of the present invention, multiple fixed bed reactors of described series connection are four fixed bed reactors of series connection.Thus can improve the conversion ratio of sulfur dioxide further, and then improve sulfur productivity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system that flue gas during smelting is prepared into sulfur according to an embodiment of the invention.
Fig. 2 is the flow chart utilizing the system that flue gas during smelting is prepared into sulfur of one embodiment of the present of invention that flue gas during smelting is prepared into sulfur method.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
According to an aspect of the present invention, the invention allows for a kind of system that flue gas during smelting is prepared into sulfur.
Flue gas during smelting is prepared into sulfur the system of the specific embodiment of the invention is described in detail below with reference to Fig. 1, including: multiple fixed bed reactors 20 of purifying plant 10 and series connection, wherein, purifying plant 10 has flue gas during smelting entrance 11, absorption liquid entrance 12, steam inlet 13 and sulfur dioxide gas outlet 14.Multiple fixed bed reactors are respectively provided with reducing agent feed(raw material)inlet 22, process gas outlet 23 and sulfur outlet 24, catalyst storaging piece 25 it is provided with in the plurality of fixed bed reactors, first order fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur entrance 26, second level fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur dioxide gas entrance 21, described sulfur dioxide gas entrance 21 exports 14 with the sulfur dioxide gas of described purifying plant and is connected, the reducing agent feed(raw material)inlet 22 being positioned on subordinate's fixed bed reactors in multiple fixed bed reactors of described series connection is connected with the process gas outlet 23 on upper level fixed bed reactors.
According to a particular embodiment of the invention, purifying plant 10 includes: absorption tower, regenerator, pump and reboiler.According to a particular embodiment of the invention, above-mentioned absorption tower and regenerator are packed tower, and said pump is noncorrosive pump, and above-mentioned reboiler is shell-and-tube heat exchanger.First, adopt purifying plant 10 that flue gas during smelting is carried out purification processes, in order to obtain high-concentration sulfur dioxide gas.Thus can significantly reduce the volume of flue gas during smelting, improve sulfur dioxide concentration in mixing gas.
According to a particular embodiment of the invention, absorb liquid entrance to be connected with organic solvent storage tank.And then adopt organic solvent to absorb the sulfur dioxide in flue gas during smelting, obtain the absorption liquid containing sulfur dioxide；Adopt low-pressure steam that the described absorption liquid containing sulfur dioxide is carried out desorbing, in order to obtain described sulfur dioxide gas.By adopting organic solvent can be effectively improved concentration of SO 2 gas, the method for the sulfur dioxide in the more existing activated coke method of the method, Citrate Buffer absorption flue gas during smelting can significantly improve the concentration of sulfur dioxide, and the method energy consumption is low, and cost is low.
According to a particular embodiment of the invention, its volume of sulfur dioxide gas by obtaining after flue gas during smelting is purified can be decreased to 10～15% (standard state) of former flue gas during smelting volume.Therefore, the flue gas during smelting after purifying carries out reduction reaction relatively directly to carry out flue gas during smelting processing and equipment size, specification can being contracted to original 15～20%.Thus can significantly reduce equipment investment.
According to a particular embodiment of the invention, the purity of the sulfur dioxide gas by obtaining after flue gas during smelting is purified can reach 99% (butt).It is practically free of oxygen and other noble gases, thus can reduce reducing agent consumption and reduction reaction temperature, and then significantly improve follow-up reduction reaction efficiency, reduce cost.
According to a particular embodiment of the invention, the concrete grammar that flue gas during smelting is carried out purification processes by purifying plant is utilized to be not particularly restricted, first such as flue gas during smelting can be carried out spray washing and cooling processes, adopt organic solvent absorbent that the sulfur dioxide in flue gas during smelting is adsorbed again and elimination processes, and then the sulfur dioxide in flue gas during smelting is carried out concentration, improve the purity of sulfur dioxide, reduce overall accumulated amount, reduce redox reaction equipment investment, improve redox reaction efficiency.
According to a particular embodiment of the invention, the reducing agent feed(raw material)inlet on first fixed bed reactors in multiple fixed bed reactors of series connection is connected with natural gas storage tank, water gas storage tank, coal storage tank and coke storage tank.Therefore, first fixed reactor is suitable to the one in natural gas, water gas, coal and coke and sulfur reaction, and then obtains reducing agent hydrogen sulfide gas.Thus, first fixed bed reactors is suitable for follow-up several fixed bed reactors provides reducing agent.Concrete example according to the present invention, the reducing agent feed(raw material)inlet being positioned on subordinate's fixed bed reactors in multiple fixed bed reactors of series connection is connected with the process gas outlet on upper level fixed bed reactors.Thus, reducing agent hydrogen sulfide gas required in subordinate's fixed bed reactors can complete unreacted hydrogen sulfide gas completely in upper level fixed bed reactors, and then directly can react obtain sulfur with sulfur dioxide.Therefore all without again passing into reducing gases raw material such as natural gas, water gas, coal and coke etc. in what fixed bed reactors of other except first order fixed bed reactors.Thus can improve the conversion ratio of sulfur dioxide further.
According to a particular embodiment of the invention, fixed bed reactors are preferably the fixed bed reactors of four series connection.According to a particular embodiment of the invention, the first fixed bed reactors in the fixed bed reactors of four series connection are suitable to preparation reducing gases hydrogen sulfide gas, and three follow-up fixed bed reactors are then suitable to sulfur dioxide and generate sulfur with reducing agent hydrogen sulfide generation redox reaction.Therefore, the fixed bed reactors of four series connection are suitable to tertiary oxidation reduction reaction.Thus can improve Sulphur Dioxide rate further, improve sulfur productivity.According to a particular embodiment of the invention, adopt and connect between two fixed bed reactors, one-level is occurred to convert (stair oxidation reduction reaction), the response rate of sulfur is up to 93～95%, adopt and connect between three fixed bed reactors, up to 94～96% when there is two grades of conversion (secondary oxidation reduction reactions), adopt and connect between four fixed bed reactors, up to 96～98% when there is three grades of conversion (tertiary oxidation reduction reactions).
In order to conveniently understand the system that flue gas during smelting is prepared into sulfur of the above embodiment of the present invention, below the method utilizing this system that flue gas during smelting is prepared into sulfur being described, the method includes:
In purifying plant, described flue gas during smelting will be carried out purification processes, in order to obtain sulfur dioxide gas；
Make described sulfur dioxide gas in equipped with the fixed bed reactors of catalyst with the reducing agent generation redox reaction generated, in order to obtain described sulfur.
Thus, by adopting said method that flue gas during smelting can directly be prepared into sulfur effectively, eliminate the substantial amounts of sulphuric acid of deposit, efficiently solve the problem that in antacid field, sulphuric acid not easily stores, also efficiently solve liquid sulfuric acid simultaneously and not easily transport for long-distance and the problem that causes the stopping production of upstream smelting system.And by said method, flue gas during smelting is carried out purification processes, it is possible to significantly reduce the volume of the available gas sulfur dioxide preparing sulfur, and then reduce the equipment investment of reduction reaction；Improve the purity of sulfur dioxide simultaneously, so can reduction reaction efficiency, improve sulfur productivity.
The utilization of the above embodiment of the present invention is described in detail below with reference to Fig. 2 and flue gas during smelting is prepared into the method that the system of sulfur prepares into sulfur.
S100: purification processes
According to a particular embodiment of the invention, first, in purifying plant, flue gas during smelting is carried out purification processes, in order to obtain high-concentration sulfur dioxide gas.Thus can significantly reduce the volume of flue gas during smelting, improve sulfur dioxide concentration in mixing gas.
According to a particular embodiment of the invention, the concrete grammar that purifying plant carries out purification processes is utilized to include: to adopt organic solvent to absorb the sulfur dioxide in flue gas during smelting, obtain the absorption liquid containing sulfur dioxide；Adopt low-pressure steam that the described absorption liquid containing sulfur dioxide is carried out desorbing, in order to obtain described sulfur dioxide gas.
Thus, adopt organic solvent can be effectively improved concentration of SO 2 gas, the method of the sulfur dioxide in the more existing activated coke method of the method, Citrate Buffer absorption flue gas during smelting can significantly improve the concentration of sulfur dioxide, and the method energy consumption is low, and cost is low.
According to a particular embodiment of the invention, its volume of sulfur dioxide gas by obtaining after flue gas during smelting is purified can be decreased to 10～15% (standard state) of former flue gas during smelting volume.Therefore, the flue gas during smelting after purifying carries out reduction reaction relatively directly to carry out flue gas during smelting processing and equipment size, specification can being contracted to original 15～20%.Thus can significantly reduce equipment investment.
According to a particular embodiment of the invention, the purity of the sulfur dioxide gas by obtaining after flue gas during smelting is purified can reach 99% (butt).It is practically free of oxygen and other noble gases, thus can reduce reducing agent consumption and reduction reaction temperature, and then significantly improve follow-up reduction reaction efficiency, reduce cost.
According to a particular embodiment of the invention, the concrete grammar that flue gas during smelting carries out purification processes is not particularly restricted, first such as flue gas during smelting can be carried out spray washing and cooling processes, adopt organic solvent absorbent that the sulfur dioxide in flue gas during smelting is adsorbed again and elimination processes, and then the sulfur dioxide in flue gas during smelting is carried out concentration, improve the purity of sulfur dioxide, reduce overall accumulated amount, reduce redox reaction equipment investment, improve redox reaction efficiency.
According to a particular embodiment of the invention, after flue gas during smelting entered purification processes, SO therein2Concentration can be reduced to 100mg/Nm2Below, it is possible to directly empty.
S200: redox reaction
According to a particular embodiment of the invention, further, make described sulfur dioxide gas in equipped with the fixed bed reactors of catalyst with the reducing agent generation redox reaction generated, in order to obtain described sulfur.Thus, the method is utilized effectively sulfur dioxide can be prepared into sulfur.And then avoid sulfur dioxide is directly prepared into the problem not easily stored that sulphuric acid brings, also efficiently solve liquid sulfuric acid simultaneously and not easily transport for long-distance and the problem that causes the stopping production of upstream smelting system.Therefore, the system of the above embodiment of the present invention can not only process the SO in flue gas during smelting well2, make the SO in emission2Concentration is reduced to 100mg/Nm2Hereinafter, simultaneously product be easy to store and transport for solid sulfur, and then can effectively solve the problem that sulphuric acid not easily stores and transports.
According to a particular embodiment of the invention, the reducing agent that redox reaction adopts can hydrogen sulfide gas, hydrogen sulfide gas can pass through to pass at least one in natural gas, water gas, coal and coke in fixed bed reactors and obtain with sulfur reaction.Thus can improve reduction reaction efficiency further.
According to a particular embodiment of the invention, containing substantial amounts of granule foreign, oxygen and noble gas in flue gas during smelting, if directly flue gas during smelting is carried out reduction prepares sulfur, oxygen therein can consume substantial amounts of reducing agent, increases operating cost；Meanwhile, noble gas also can consume substantial amounts of heat so that the reduction reaction temperature preparing sulfur is increased to 1000 degrees centigrade, and then can dramatically increase energy consumption.The purity of the present invention sulfur dioxide gas for preparing sulfur can reach 99% (butt), is practically free of oxygen and other noble gases.Therefore, reduction reaction consumes the amount of reducing agent almost close to theoretical consumption, thus can reduce cost further.
Existing by low concentration SO2Solid sulfur method is prepared in reduction has anthracite ash direct-reduction process or with natural gas direct-reduction process, flue gas during smelting owing to all adopting sulfur dioxide concentration relatively low is made directly oxidoreduction and prepares sulfur, therefore all there is reducing agent consumption big, reduction reaction temperature is high, the problem that equipment investment is big etc. dramatically increases cost.Generally adopt above-mentioned existing low concentration SO2The method cost preparing into sulfur about reaches 1400 yuan/ton of sulfur.
According to a particular embodiment of the invention, flue gas during smelting is carried out purification processes by the system that flue gas during smelting is prepared into sulfur in advance that adopt the above embodiment of the present invention, improve purity and the concentration of sulfur dioxide gas, consumption and the energy loss of reducing agent can be saved significantly on, and then operating cost can be saved significantly on.According to a particular embodiment of the invention, adopting the method cost that flue gas during smelting is prepared into sulfur of the above embodiment of the present invention to be about 850 yuan/ton of sulfur, the more foregoing existing method preparing sulfur significantly reduces cost.
According to a particular embodiment of the invention, having prepared into sulfur through above-mentioned redox reaction by sulfur dioxide gas, last unreacting gas enters the burning of waste gas burning tower, empties through the gas of innoxious burning.
According to a particular embodiment of the invention, in multiple fixed bed reactors of series connection, the first fixed bed reactors are suitable to preparation reducing gases hydrogen sulfide gas, and follow-up fixed bed reactors are then suitable to sulfur dioxide and reducing agent hydrogen sulfide generation multi-stage oxidizing reduction reaction and then generate sulfur.Thus can improve the reduction efficiency of sulfur dioxide, improve the productivity of sulfur.According to a particular embodiment of the invention, fixed bed reactors are built with catalyst；The temperature of first order redox reaction is 500～700 degrees Celsius；The temperature of other grade of redox reaction is 180～330 degrees Celsius, and specifically, inlet temperature controls at 220～240 DEG C, and outlet temperature is 270～300 DEG C, and this reaction is exothermic reaction.Redox reaction requires Process Gas H2S and SO2Ratio be 2:1 (mol ratio), thus can obtain high conversion ratio.
Reaction equation:
2H2S+SO2=3S+2H2O (catalyst and under reducing agent effect)
According to a particular embodiment of the invention, multi-stage oxidizing reduction reaction can be preferably tertiary oxidation reduction reaction.Adopt tertiary oxidation reduction reaction, be for reaching higher sulfur recovery rate, reduce the concentration of the sulfur dioxide in tail gas that redox arrangement is discharged.According to a particular embodiment of the invention, one-level is adopted to convert (stair oxidation reduction reaction), the response rate of sulfur is up to 93～95%, up to 94～96% during two grades of conversion (secondary oxidation reduction reactions), up to 96～98% during three grades of conversion (tertiary oxidation reduction reactions).
Embodiment
Adopting organic solvent that the flue gas during smelting from outlet of gathering dust is adsorbed, and adopt low-pressure steam to carry out desorbing process, obtain the sulfur dioxide gas of 99% concentration (butt), volume-diminished is the 12% of flue gas during smelting volume.Pure sulfur dioxide gas is entered sulfur system processed, in four fixed bed reactors connected, level Four redox reaction is carried out with hydrogen sulfide gas when there is catalyst, fixed bed reactors are built with catalyst, and hydrogen sulfide gas is a kind of reaction acquisition by passing into sulfur in fixed bed reactors and in the natural gas passed into, water gas, coal and coke.The temperature of the redox reaction in first fixed bed reactors is 500～700 degrees Celsius, and the inlet temperature of other fixed bed reactors controls at 220～240 DEG C, and outlet temperature is 270～300 DEG C, and this reaction is exothermic reaction.Generating Molten sulphur, last unreacting gas enters the burning of waste gas burning tower, empties through the gas of innoxious burning.
Being computed, the above-mentioned cost that flue gas during smelting is prepared into sulfur is about 850 yuan/ton of sulfur.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, what the schematic representation of above-mentioned term is not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (6)
1. the system that flue gas during smelting is prepared into sulfur, it is characterised in that described system includes:
Purifying plant, described purifying plant has flue gas during smelting entrance, absorption liquid entrance, steam inlet and sulfur dioxide gas outlet；
Multiple fixed bed reactors of series connection, the plurality of fixed bed reactors are respectively provided with reducing agent feed(raw material)inlet, process gas outlet and sulfur outlet, catalyst storaging piece it is provided with in the plurality of fixed bed reactors, first order fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur entrance, second level fixed bed reactors in multiple fixed bed reactors of described series connection have sulfur dioxide gas entrance, described sulfur dioxide gas entrance exports with the sulfur dioxide gas of described purifying plant and is connected, the reducing agent feed(raw material)inlet being positioned on subordinate's fixed bed reactors in multiple fixed bed reactors of described series connection is connected with the process gas outlet on upper level fixed bed reactors.
2. system according to claim 1, it is characterized in that, described purifying plant includes: absorption tower, regenerator, pump and reboiler, described regenerator is connected with described absorption tower, described pump is connected with described regenerator respectively with reboiler, described absorption tower is suitable for use with organic solvent and absorbs the sulfur dioxide in described flue gas during smelting, obtains the absorption liquid containing sulfur dioxide；Described regenerator is suitable for use with low-pressure steam and the described absorption liquid containing sulfur dioxide is carried out desorbing, in order to obtain described sulfur dioxide gas.
3. system according to claim 2, it is characterised in that described absorption tower and regenerator are packed tower, described pump is noncorrosive pump, and described reboiler is shell-and-tube heat exchanger.
4. system according to claim 1, it is characterised in that described absorption liquid entrance is connected with organic solvent storage tank.
5. system according to claim 1, it is characterised in that described reducing agent feed(raw material)inlet is connected with in natural gas storage tank, water gas storage tank, coal storage tank and coke storage tank.
6. system according to claim 1, it is characterised in that multiple fixed bed reactors of described series connection are four fixed bed reactors of series connection.
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| CN107987011A (en) * | 2017-12-12 | 2018-05-04 | 安徽国星生物化学有限公司 | A kind of piperidines is continuously synthesizing to method |
| CN108128757A (en) * | 2018-02-01 | 2018-06-08 | 长沙有色冶金设计研究院有限公司 | A kind of technique of flue gas during smelting sulphur |
| CN110304609A (en) * | 2018-03-27 | 2019-10-08 | 中国科学院过程工程研究所 | A kind of sulphur purification schemes suitable for coal gas direct-reduction metallurgical gas production |
| CN112495159A (en) * | 2020-11-30 | 2021-03-16 | 武汉大学 | Series device for sulfur hexafluoride gas degradation treatment |
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| CN205472650U (en) * | 2016-01-15 | 2016-08-17 | 中国恩菲工程技术有限公司 | System for flue gas will be smelted and sulphur will be prepared into |
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| CN110304609A (en) * | 2018-03-27 | 2019-10-08 | 中国科学院过程工程研究所 | A kind of sulphur purification schemes suitable for coal gas direct-reduction metallurgical gas production |
| CN112495159A (en) * | 2020-11-30 | 2021-03-16 | 武汉大学 | Series device for sulfur hexafluoride gas degradation treatment |
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| CN105731386B (en) | 2018-09-11 |
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