CN116059782A - SO-containing material 2 Method and system for feeding vacuum regenerated gas into sulfur making device - Google Patents
SO-containing material 2 Method and system for feeding vacuum regenerated gas into sulfur making device Download PDFInfo
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- CN116059782A CN116059782A CN202111279116.XA CN202111279116A CN116059782A CN 116059782 A CN116059782 A CN 116059782A CN 202111279116 A CN202111279116 A CN 202111279116A CN 116059782 A CN116059782 A CN 116059782A
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- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 91
- 239000011593 sulfur Substances 0.000 title claims abstract description 91
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 145
- 238000011069 regeneration method Methods 0.000 claims abstract description 94
- 230000008929 regeneration Effects 0.000 claims abstract description 93
- 239000007789 gas Substances 0.000 claims abstract description 86
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003546 flue gas Substances 0.000 claims abstract description 70
- 230000001276 controlling effect Effects 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000001179 sorption measurement Methods 0.000 claims description 38
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 22
- 230000033228 biological regulation Effects 0.000 claims description 22
- 239000003463 adsorbent Substances 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 238000006477 desulfuration reaction Methods 0.000 claims description 9
- 230000023556 desulfurization Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract 1
- 230000002596 correlated effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000013094 zinc-based metal-organic framework Substances 0.000 description 1
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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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Separation Of Gases By Adsorption (AREA)
Abstract
The invention relates to a method for preparing a composite material containing SO 2 The method and system for feeding vacuum regenerated gas into sulfur producing device includes that after S Zorb regenerated gas is adsorbed-regenerated, the produced vacuum regenerated gas is transferred to sulfur producing device, regulating valve I and flowmeter are set on transfer pipeline in turn, and the two are related to form first stage regulating loop; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and a front pipeline of the flowmeter, a regulating valve II is arranged on the span, and a second-stage regulating and controlling loop is formed in a correlated manner with the flowmeter; before the vacuum regeneration is started, a regulating valve II is opened, so that S Zorb regenerated flue gas is conveyed to a sulfur making device through a cross line; after the regeneration is started, the gas quantity and the temperature are regulated and controlled through a two-stage regulating and controlling loop, and the gas quantity and the temperature entering the sulfur producing device are kept stable. The invention realizes the stable gas quantity of the vacuum regenerated gas generated by S Zorb regenerated flue gas adsorption-regeneration, improves the temperature of the vacuum regenerated gas, reduces the impact on a subsequent sulfur production device, and avoids the corrosion of pipelines and equipment.
Description
Technical Field
The invention belongs to the technical field of atmospheric pollution treatment, and in particular relates to a catalyst containing SO 2 A method and a system for feeding vacuum regenerated gas into a sulfur production device.
Background
The S Zorb device is mainly used for catalyzing the adsorption desulfurization of gasoline and comprises four parts of feeding and adsorption desulfurization reaction, adsorbent regeneration, adsorbent circulation and product stabilization. In the air oxidation regeneration process of the adsorbent, S Zorb regenerated flue gas which mainly contains sulfur dioxide is generated and needs to be treated.
Currently, widely used desulfurization techniques can be classified into wet desulfurization techniques and dry desulfurization techniques. The prior desulfurization technology can be divided into three types according to the recycling degree of desulfurization products: the first type is that sulfur dioxide is not recoverable or is difficult to use after being removed, such as a gypsum method, a carbide slag method and the like, and a large amount of liquid or solid waste is generated by the methods, so that secondary pollution is caused. The second type is to convert sulfur dioxide into dilute sulfuric acid or sulfate by chemical oxidation or catalytic oxidation, such as hydrogen peroxide oxidation, ammoxidation, wet catalysis with activated carbon, etc., for example, patent CN105381699a describes the use of hydrogen peroxide to remove sulfur dioxide, and patent CN101085410a describes the conversion of sulfur dioxide in flue gas into ammonia sulfate. The technology needs to consume oxidant or catalyst uninterruptedly, and involves the problems of radius and cost of medicament supply, and is inconvenient to use in remote areas. The third category is that the low concentration sulfur dioxide gas is absorbed or adsorbed and then desorbed and regenerated to obtain the high concentration sulfur dioxide gas, which can be used for preparing liquid sulfur dioxide, sulfuric acid in an acid preparation working section or sulfur in a sulfur preparation device.
CN111375274A discloses a composition containing SO 2 The gas treatment method and device mainly comprises a compression unit, an adsorption unit and a regeneration unit, wherein the compression unit mainly comprises a compressor and is used for carrying out compression treatment on waste gas; the adsorption unit mainly comprises two or more adsorption towers filled with modified zinc-based metal organic framework material for SO 2 Is adsorbed by the adsorption column; the regeneration unit mainly comprises a vacuum pump, a nitrogen heater and the like and is used for desorption regeneration to obtain high-concentration SO 2 . In the patent, the desorption regeneration adopts heating regeneration, vacuum regeneration or vacuum thermal regeneration, and the obtained desorption gas is high-concentration SO 2 Gases, SO that can be used to meet the use requirements 2 The application occasion of the gas. However, the vacuum regeneration process affects that if the vacuum regeneration gas is directly fed into the subsequent reuse device, the stable operation of the device is always impacted to a certain extent, so that the compression is needed,Buffer facilities, etc.
After adsorption treatment, the S Zorb regenerated flue gas is generally regenerated by vacuum or/and vacuum heat, and the gas generated by vacuum regeneration is gas containing high concentration sulfur dioxide and can enter a refinery sulfur making device to prepare sulfur. However, due to the operation curve and the process characteristics of the vacuum pump, the air quantity of vacuum regeneration is difficult to stabilize, the fluctuation range is large, and the air quantity fluctuation can cause great influence on the stable operation of the sulfur production device. In addition, as the temperature of the vacuum regenerated gas is normal temperature, the temperature is unstable in the process of entering the sulfur production device, and the instability of the sulfur production device is also increased. For this problem, in the design practice of industrial devices, a buffer facility such as a buffer tank is generally arranged behind the vacuum regeneration equipment at the present stage, because the outlet pressure of the vacuum pump is not high, in order to meet the buffer effect, the buffer tank is larger in size, and some designs are designed to reduce the size of the buffer tank, and a compressor needs to be connected in series with the vacuum pump outlet, so that the vacuum regeneration gas is compressed and then enters the buffer tank, so that the size of the buffer tank is reduced, and the buffer efficiency is improved, but the occupied area, the running cost and the primary investment cost are necessarily increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a catalyst containing SO 2 A method and a system for feeding vacuum regenerated gas into a sulfur production device. Under the condition of no compression and buffering facilities, the invention realizes the stable gas quantity of the vacuum regenerated gas generated by the regeneration of the S Zorb regenerated flue gas after the adsorption, improves the temperature of the vacuum regenerated gas, reduces the impact on the subsequent sulfur production device, and avoids the corrosion of pipelines and equipment.
In a first aspect the invention provides a SO-containing composition 2 The method for feeding the vacuum regenerated gas into the sulfur production device comprises the following steps:
the S Zorb regenerated flue gas is subjected to adsorption-vacuum regeneration treatment, the generated vacuum regenerated gas is conveyed to a sulfur making device, a regulating valve I and a flowmeter are sequentially arranged on a conveying pipeline, and the regulating valve I and the flowmeter are associated to form a first-stage regulating and controlling loop; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and the front pipeline of the flowmeter, a regulating valve II is arranged on the communication span, and a second-stage regulating and controlling loop is formed in association with the flowmeter; before the vacuum regeneration is started, the regulating valve I is closed, and the regulating valve II is provided with a certain opening degree, so that S Zorb regenerated flue gas is directly conveyed to the sulfur making device through the overline; after the vacuum regeneration is started, the opening of the regulating valve I is gradually increased through the first-stage regulating and controlling loop, so that the air quantity entering the sulfur making device is stable, when the air quantity is still not stable due to the full opening of the regulating valve I, the regulating valve I is switched to the second-stage regulating and controlling loop, the S Zorb regenerated flue gas air inflow is gradually increased, the air quantity entering the sulfur making device is kept stable, and the process is repeated until the next vacuum regeneration.
In the method, the S Zorb regenerated flue gas is flue gas generated in the adsorbent regeneration process of the S Zorb catalytic gasoline adsorption desulfurization production device, and SO 2 The concentration is 0.5-7v%, O 2 The volume content is less than 0.5 percent, and the temperature is 150-240 ℃.
In the method, the S Zorb regenerated flue gas is adsorbed in an adsorption device, the adsorption pressure is 0.3-0.9 MPaG, and the adsorption time is 5-20 min.
In the method, after the S Zorb regenerated flue gas is adsorbed by an adsorption tower, the S Zorb regenerated flue gas is regenerated by vacuum regeneration equipment, and the temperature of the generated vacuum regenerated gas is generally 15-35 ℃.
In the method, before the vacuum regeneration is started, the regulating valve I is closed, the regulating valve II is provided with a certain opening, and the opening of the regulating valve II is controlled to be 10% -60%, preferably 30% -40%, so that the S Zorb regenerated flue gas is directly conveyed into the sulfur production device through the communication overline.
In the method, after the vacuum regeneration is started, the opening of the regulating valve I is gradually increased, so that the gas quantity entering the sulfur making device is stable, and the temperature of the gas entering the sulfur making device is 30-180 ℃ higher than that of the vacuum regenerated gas. When the vacuum regeneration starts, the regulating valve II is opened to a certain opening degree, so that the mixed gas entering the downstream sulfur making device can reach a certain temperature, the generation of water is prevented, and the corrosion of a conveying pipeline is avoided.
In the method, when the regulating valve I is fully opened and the air quantity entering the sulfur producing device cannot be kept stable, the regulating valve I is switched to a second-stage regulating circuit, and the air quantity of S Zorb regenerated flue gas is gradually increased, so that the air quantity entering the sulfur producing device is stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and the gas entering the sulfur producing device can be completely S Zorb regenerated flue gas in order to keep the gas quantity stable.
In the method, the preset range of the air quantity is determined according to the air inlet requirement of the sulfur making device, the air quantity is regulated and controlled within the preset range through the synergistic effect of the first-stage regulating and controlling loop and the second-stage regulating and controlling loop, if the air quantity still cannot be kept within the preset range after regulation and control, the vacuum regeneration operation is stopped, only the S Zorb regenerated flue gas is maintained to be conveyed to the sulfur making device through a communication overline, and the process is repeated until the next vacuum regeneration is finished.
In the method of the invention, two or more adsorption towers are arranged and can alternately operate. The adsorption tower is a conventional packed tower, and the adsorbent filled in the tower is at least one of various porous adsorbents capable of adsorbing sulfur dioxide, such as activated carbon, molecular sieve, silica gel and the like.
In the method of the present invention, the vacuum regeneration apparatus is a vacuum pump or the like for desorbing and regenerating the adsorbent, and may be any one selected from, but not limited to, a screw vacuum pump, a liquid ring vacuum pump, a piston vacuum pump, a diaphragm vacuum pump, a rotary vane vacuum pump, and the like.
In a second aspect the invention provides a method for the above-mentioned SO-containing 2 The system of the vacuum regenerated gas sulfur making device mainly comprises an S Zorb regenerated flue gas adsorption tower, vacuum regeneration equipment and a two-stage regulation and control loop, wherein the S Zorb regenerated flue gas is adsorbed by the adsorption tower and regenerated by the vacuum regeneration equipment, the generated vacuum regenerated gas is conveyed to the sulfur making device, and a regulating valve I and a flowmeter are sequentially arranged on a conveying pipeline; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and the front pipeline of the flowmeter, and a regulating valve II is arranged on the communication span; the method is characterized in that a two-stage regulation and control loop is adopted to keep the stability of the gas quantity fed into the sulfur production device, and the first-stage regulation and control loop mainly comprises a regulating valve I, a flowmeter and a regulation and control loop pipeline formed by the association of the regulating valve I and the flowmeter; the second-stage regulating and controlling loop mainly comprises a communicating overline, a regulating valve II, a flowmeter and a regulating and controlling loop pipeline formed by the two.
In the device, the adsorption tower is a packed tower which is conventionally used in the field, and is filled with at least one of adsorbent used for adsorbing S Zorb regenerated flue gas, such as activated carbon, molecular sieve, silica gel and the like. The adsorption towers are generally arranged at two or more, and can alternately operate.
In the device, the vacuum regeneration equipment is used for vacuum regeneration after the adsorption treatment of the S Zorb regenerated flue gas, and can be selected from any one of a screw vacuum pump, a liquid ring vacuum pump, a piston vacuum pump, a diaphragm vacuum pump, a rotary vane vacuum pump and the like.
In the device, before the vacuum regeneration is started, the regulating valve I is closed, and the regulating valve II is provided with a certain opening degree, so that S Zorb regenerated flue gas can be directly conveyed to the sulfur production device through the communication span.
In the device, in a first-stage regulation and control loop, the opening of the regulating valve I is regulated and controlled through the flowmeter, and when the regulating valve I is fully opened and the air quantity is not stable, the regulating valve I is switched to a second-stage regulation and control loop.
In the device, in the second-stage regulation loop, the opening of the regulating valve II is gradually increased in order to keep the air quantity of the sulfur inlet device stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and the gas entering the sulfur producing device can be completely S Zorb regenerated flue gas in order to keep the gas quantity stable.
Compared with the prior art, the invention has the following beneficial effects:
(1) During conventional regeneration operation, the air quantity fluctuation generated by vacuum regeneration of the adsorbent is large, and the adsorbent is directly conveyed to a subsequent recycling device such as a sulfur making device to cause large impact, and meanwhile, the temperature of the vacuum regenerated air is relatively low, so that the instability and the energy consumption of the sulfur making device are increased. In order to solve the problems, the inventor of the application sets a two-stage regulation and control loop on a vacuum regenerated gas conveying pipeline, and introduces S Zorb regenerated flue gas into a conveying system for regulating and controlling the gas quantity and temperature entering a sulfur making device, so that the nonlinear vacuum regeneration process is linearized to the greatest extent, the gas quantity of the vacuum regenerated gas of a sulfur making device is ensured to be stable, the impact on the sulfur making device is reduced under the condition of not increasing compression and buffering facilities, and meanwhile, the heat in the S Zorb regenerated flue gas is utilized, and the fuel consumption of the sulfur making device is saved.
(2) The inventor discovers that the temperature of the vacuum regenerated gas is normal temperature, so that the temperature is unstable when the vacuum regenerated gas directly enters a sulfur production device, particularly water is separated out, and the pipeline and equipment are easy to corrode after long-term operation. According to the invention, S Zorb regeneration flue gas is introduced in both the vacuum regeneration and the vacuum regeneration idle period, and the proper temperature range is controlled, so that the generation of water can be effectively prevented, and the corrosion of pipelines and equipment is avoided.
(3) Before the vacuum regeneration is started, the S Zorb regenerated flue gas is conveyed to a sulfur production device, so that the gas flow and the temperature, particularly the temperature, of the sulfur production device can be stabilized in advance, and the corrosion of a conveying pipeline is avoided; when the vacuum regeneration is stopped, the S Zorb regenerated flue gas is continuously conveyed to the sulfur producing device until the next regeneration process starts, so that the stable operation of the sulfur producing device in the whole conveying process is ensured.
Drawings
FIG. 1 is a schematic flow diagram of the method and apparatus of the present invention;
wherein, the 1-S Zorb regenerated flue gas, the 2-communication span, the 3-regulating valve II, the 4-flowmeter, the 5-sulfur removal device vacuum regenerated gas, the 6-adsorption tower (601, 602), the 7-regulating valve I and the 8-vacuum pump; 101-first regulation loop, 102-second regulation loop.
Detailed Description
The method and apparatus of the present invention will now be described in further detail with reference to the accompanying drawings and examples. The embodiments and specific operation procedures are given on the premise of the technical scheme of the invention, but the protection scope of the invention is not limited to the following embodiments.
The experimental methods in the following examples, unless otherwise specified, are all conventional in the art. The experimental materials used in the examples described below, unless otherwise specified, were purchased from conventional biochemical reagent stores.
The invention contains SO 2 A flow diagram of a method and a system for feeding vacuum regenerated gas into a sulfur production device is shown in figure 1, and mainly comprises an adsorption tower 6, a vacuum pump 8, a regulating valve I (7), a regulating valve II (3), a flowmeter 4, a first regulating loop 101 and a second regulating loopA way 102. After the S Zorb regenerated flue gas 1 is adsorbed by an adsorption tower 601 or 602 and subjected to vacuum regeneration by a vacuum pump 8, the generated vacuum regenerated gas is conveyed to a downstream sulfur making device, and a regulating valve I and a flowmeter 4 are sequentially arranged on a conveying pipeline and are associated to form a first-stage regulating and controlling loop 101; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and the pipeline in front of the flowmeter 4 and behind the regulating valve I, a regulating valve II is arranged on the communication span, and a second-stage regulating and controlling loop is formed in association with the flowmeter 4. Before the vacuum regeneration is started, the regulating valve I is closed, the regulating valve II is provided with a certain opening, and the opening is 10% -60%, preferably 30% -40%, so that the S Zorb regenerated flue gas is directly conveyed to the sulfur making device through the communication overline. After the vacuum regeneration is started, a first-stage regulating and controlling loop is started, the opening of a regulating valve I is gradually increased, the opening of the regulating valve I is regulated and controlled by a flowmeter 4, the gas quantity after the vacuum regenerated gas and the S Zorb regenerated gas are mixed is regulated and controlled within a preset range, and the temperature of the gas entering a sulfur producing device is 30-180 ℃ higher than that of the vacuum regenerated gas. When the regulating valve I is fully opened and the air quantity can not be kept stable, the regulating valve I is switched to a second-stage regulating and controlling loop, the air quantity of S Zorb regenerated flue gas is gradually increased through regulating and controlling the flowmeter 4 and the regulating valve II, and the air quantity fed into the sulfur producing device is kept stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and in order to keep the gas quantity stable, the gas entering the sulfur producing device is completely S Zorb regenerated flue gas, and the process is repeated until the next vacuum regeneration.
Example 1
SO in regenerated flue gas of S Zorb device of certain enterprise 2 The volume concentration of (2) - (5), O 2 Is less than 0.2% by volume and has a smoke throughput of about 2900Nm 3 And/h. The method and the system of the figure 1 are adopted to treat and convey the sulfur to a sulfur making device. The adsorbent is activated carbon adsorbent, the adsorption pressure is 0.6MPaG, and the adsorption time is 15min; and (5) carrying out vacuum regeneration after the adsorption is finished, wherein the temperature of the vacuum regeneration gas is 25 ℃. The air quantity required to be delivered by the downstream sulfur making device is stabilized at 300-400 Nm 3 /h。
Before vacuum regeneration is started, a regulating valve I is closed, and the opening degree of the regulating valve II is set to be 30%, so that S Zorb regenerated flue gas is directly connected across a lineIs then sent to a sulfur producing device. After the vacuum regeneration is started, a first-stage regulating and controlling loop is started, the opening of a regulating valve I is gradually increased, the opening is regulated and controlled by a flowmeter and the regulating valve I, and the air quantity after the vacuum regeneration air and the S Zorb regeneration flue gas are mixed is regulated and controlled to be 300-400 Nm 3 In the range of/h, and the temperature of the gas entering the sulfur producing device is 80 ℃ higher than the temperature of the vacuum regenerated gas. When the regulating valve I is fully opened and the air quantity is still not stable, the regulating valve I is switched to a second-stage regulating and controlling loop, the air inflow of the S Zorb regenerated flue gas is gradually increased through regulating and controlling the flow meter and the regulating valve II, and the air quantity and the temperature of the sulfur making device are kept stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and in order to keep the gas quantity stable, the gas entering the sulfur producing device is completely S Zorb regenerated flue gas, and the process is repeated until the next vacuum regeneration. The test results are shown in Table 1.
Example 2
Before the vacuum regeneration is started, the regulating valve I is closed, and the opening of the regulating valve II is set to 80%, so that S Zorb regenerated flue gas is directly conveyed to the sulfur making device through the communication overline. After the vacuum regeneration is started, a first-stage regulating and controlling loop is started, the opening of a regulating valve I is gradually increased, the opening is regulated and controlled by a flowmeter and the regulating valve I, and the air quantity after the vacuum regeneration air and the S Zorb regeneration flue gas are mixed is regulated and controlled to be 300-400 Nm 3 In the range of/h, and the temperature of the gas entering the sulfur making device is 180 ℃ higher than the temperature of the vacuum regenerated gas. When the regulating valve I is fully opened and the air quantity is still not stable, the regulating valve I is switched to a second-stage regulating and controlling loop, the air inflow of the S Zorb regenerated flue gas is gradually increased through regulating and controlling the flow meter and the regulating valve II, and the air quantity and the temperature of the sulfur making device are kept stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and in order to keep the gas quantity stable, the gas entering the sulfur producing device is completely SZorb regenerated flue gas, and the process is repeated until the next vacuum regeneration. The test results are shown in Table 1.
Example 3
Before the vacuum regeneration is started, the regulating valve I is closed, and the opening of the regulating valve II is set to be 10%, so that S Zorb regenerated flue gas is directly conveyed to the sulfur making device through the communication overline. After the vacuum regeneration is started, a first-stage regulating and controlling loop is started, and the temperature is gradually increasedThe opening of the regulating valve I is added, the vacuum regenerated gas and the S Zorb regenerated flue gas are regulated and controlled to be 300-400 Nm through the regulation and control of the flowmeter and the regulating valve I 3 In the range of/h, and the temperature of the gas entering the sulfur producing device is 30 ℃ higher than the temperature of the vacuum regenerated gas. When the regulating valve I is fully opened and the air quantity is still not stable, the regulating valve I is switched to a second-stage regulating and controlling loop, the air inflow of the S Zorb regenerated flue gas is gradually increased through regulating and controlling the flow meter and the regulating valve II, and the air quantity and the temperature of the sulfur making device are kept stable. In the process, the regulating valve I is closed, vacuum regeneration is stopped, and in order to keep the gas quantity stable, the gas entering the sulfur producing device is completely S Zorb regenerated flue gas, and the process is repeated until the next vacuum regeneration. The test results are shown in Table 1.
Example 4
The difference from example 1 is that: the adsorbent filled in the adsorption tower adopts silica gel to replace active carbon. The test results are shown in Table 1.
Example 5
The difference from example 1 is that: the vacuum pump adopts a screw vacuum pump. The test results are shown in Table 1.
Comparative example 1
The difference from example 1 is that: the two-stage regulation and control loop is not arranged, and the vacuum regeneration gas directly enters the sulfur making device after the vacuum pump is adopted to regenerate the adsorbent in vacuum. The test results are shown in Table 1.
Comparative example 2
The difference from example 1 is that: s Zorb regenerated flue gas is directly fed into the sulfur producing device. As a large amount of S Zorb regenerated flue gas directly enters the sulfur producing device, the temperature of the combustion furnace of the sulfur producing device is reduced, and if the normal operation of the sulfur producing device cannot be ensured without transformation.
Comparative example 3
The difference from example 1 is that: the regulating valve I and the first-stage regulating circuit are not arranged. The test results are shown in Table 1.
Comparative example 4
The difference from example 1 is that: the regulating valve II and the second regulating circuit are not arranged. The test results are shown in Table 1.
Comparative example 5
The difference from example 1 is that: the temperature of the regenerated flue gas without S Zorb is regulated and controlled to be in a proper range. Resulting in a reduction in the temperature of the sulfur plant burner and the need for increased fuel make-up.
The results of the measurement of the amount of vacuum regeneration after the vacuum regeneration in the examples and comparative examples are shown in Table 1. The vacuum regeneration temperature is normal temperature.
TABLE 1 variation in vacuum regeneration amount (unit: nm) for different examples and comparative examples 3 /h）
As can be seen from Table 1, the method of the invention can keep the air quantity within a certain range in the vacuum regeneration process, has small fluctuation, ensures the stability of the vacuum regeneration air quantity, and greatly reduces the impact on the recycling device under the condition of not adding a buffer tank.
Claims (18)
1. SO-containing material 2 The method for feeding the vacuum regenerated gas into the sulfur production device is characterized by comprising the following steps: the S Zorb regenerated flue gas is subjected to adsorption-vacuum regeneration treatment, the generated vacuum regenerated gas is conveyed to a sulfur making device, a regulating valve I and a flowmeter are sequentially arranged on a conveying pipeline, and the regulating valve I and the flowmeter are associated to form a first-stage regulating and controlling loop; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and the front pipeline of the flowmeter, a regulating valve II is arranged on the communication span, and a second-stage regulating and controlling loop is formed in association with the flowmeter; before the vacuum regeneration is started, the regulating valve I is closed, and the regulating valve II is provided with a certain opening degree, so that S Zorb regenerated flue gas is conveyed to the sulfur making device through the overline; after the vacuum regeneration is started, the opening of the regulating valve I is gradually increased through the first-stage regulating and controlling loop, so that the air quantity entering the sulfur producing device is stable, when the air quantity is still not stable due to the full opening of the regulating valve I, the regulating valve I is switched to the second-stage regulating and controlling loop, the S Zorb regenerated flue gas air inflow is gradually increased, the air quantity and the temperature entering the sulfur producing device are kept stable, and the process is repeated until the next vacuum regeneration.
2. The method according to claim 1, characterized in that: the S isZorb regenerated flue gas is flue gas generated in the adsorbent regeneration process of an S Zorb catalytic gasoline adsorption desulfurization production device, and SO 2 The concentration is 0.5-7v%, O 2 The volume content is less than 0.5 percent, and the temperature is 150-240 ℃.
3. The method according to claim 1 or 2, characterized in that: the S Zorb regenerated flue gas is adsorbed in an adsorption device, the adsorption pressure is 0.3-0.9 MPaG, and the adsorption time is 5-20 min.
4. The method according to claim 1 or 2, characterized in that: after the adsorption-vacuum regeneration treatment, the temperature of the generated vacuum regeneration gas is 15-35 ℃.
5. The method according to claim 1, characterized in that: before the vacuum regeneration is started, the opening of the regulating valve II is controlled to be 10% -60%, preferably 30% -40%.
6. The method according to claim 1, characterized in that: after the vacuum regeneration is started, the opening of the regulating valve I is gradually increased, so that the gas quantity entering the sulfur making device is stable, and the temperature of the gas entering the sulfur making device is 30-180 ℃ higher than the temperature of the vacuum regenerated gas.
7. The method according to claim 1 or 6, characterized in that: when the regulating valve I is fully opened and the air quantity entering the sulfur producing device cannot be kept stable, the regulating valve I is switched to a second-stage regulating circuit, and the air quantity of S Zorb regenerated flue gas is gradually increased, so that the air quantity entering the sulfur producing device is stable.
8. The method according to claim 7, wherein: after two-stage regulation, the gas quantity still cannot be kept in a preset range, the regulating valve I is closed, vacuum regeneration is stopped, and the gas entering the sulfur producing device is completely S Zorb regenerated flue gas in order to keep the gas quantity stable.
9. The method according to claim 1, characterized in that: the adsorption is completed in an adsorption tower, and a porous adsorbent capable of adsorbing sulfur dioxide, preferably at least one of activated carbon, molecular sieve and silica gel, is filled in the tower.
10. The method according to claim 1, characterized in that: the vacuum regeneration adopts a vacuum pump, preferably any one of a screw vacuum pump, a liquid ring vacuum pump, a piston vacuum pump, a diaphragm vacuum pump and a rotary vane vacuum pump.
11. An SO-containing composition for use in any one of claims 1-10 2 The system of the method for feeding the vacuum regenerated gas into the sulfur production device is characterized by mainly comprising an S Zorb regenerated flue gas adsorption tower, vacuum regeneration equipment and a two-stage regulation and control loop, wherein the S Zorb regenerated flue gas is adsorbed by the adsorption tower and regenerated by the vacuum regeneration equipment, the generated vacuum regenerated gas is conveyed to the sulfur production device, and a regulating valve I and a flowmeter are sequentially arranged on a conveying pipeline; a communication span is arranged between the S Zorb regenerated flue gas inlet pipeline and the front pipeline of the flowmeter, and a regulating valve II is arranged on the communication span; the method is characterized in that a two-stage regulation and control loop is adopted to keep the stability of the gas quantity fed into the sulfur production device, and the first-stage regulation and control loop mainly comprises a regulating valve I, a flowmeter and a regulation and control loop pipeline formed by the association of the regulating valve I and the flowmeter; the second-stage regulating and controlling loop mainly comprises a communicating overline, a regulating valve II, a flowmeter and a regulating and controlling loop pipeline formed by the two.
12. The system according to claim 11, wherein: the adsorption tower is a packed tower, and is filled with an adsorbent for adsorbing the S Zorb regenerated flue gas, preferably at least one of activated carbon, molecular sieve and silica gel.
13. The system according to claim 12, wherein: the adsorption towers are arranged at two or more, and alternately operate.
14. The system according to claim 11, wherein: the vacuum regeneration equipment is used for vacuum regeneration after the adsorption treatment of the S Zorb regenerated flue gas, and is selected from any one of a screw vacuum pump, a liquid ring vacuum pump, a piston vacuum pump, a diaphragm vacuum pump and a rotary vane vacuum pump.
15. The system according to claim 11, wherein: before the vacuum regeneration is started, the regulating valve I is closed, and the regulating valve II is provided with a certain opening degree, so that S Zorb regenerated flue gas can be directly conveyed to the sulfur production device through the communication span.
16. The system according to claim 11, wherein: in the first-stage regulation and control loop, the opening of the regulating valve I is regulated and controlled through the flowmeter, and when the regulating valve I is fully opened and the air quantity is still not stable, the regulating valve I is switched to the second-stage regulation and control loop.
17. The system according to claim 11 or 16, characterized in that: in the second-stage regulation and control loop, the opening of the regulating valve II is gradually increased in order to keep the air quantity of the sulfur-making device stable.
18. The system according to claim 11, wherein: after two-stage regulation, the gas quantity still cannot be kept in a preset range, the regulating valve I is closed, vacuum regeneration is stopped, and the gas entering the sulfur producing device can be completely S Zorb regenerated flue gas in order to keep the gas quantity stable.
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