CN105419882B - A kind of desulfurization of water gas method and its system - Google Patents
A kind of desulfurization of water gas method and its system Download PDFInfo
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- CN105419882B CN105419882B CN201610020837.1A CN201610020837A CN105419882B CN 105419882 B CN105419882 B CN 105419882B CN 201610020837 A CN201610020837 A CN 201610020837A CN 105419882 B CN105419882 B CN 105419882B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/005—Carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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- Industrial Gases (AREA)
- Treating Waste Gases (AREA)
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Abstract
The present invention provides a kind of desulfurization of water gas system, including：Oil expeller；The thick desulfurizing tower that entrance is connected with the outlet of the oil expeller；The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；The gas cooler that entrance is connected with the first outlet of the first gas heat exchanger；The gas-liquid separator that entrance is connected with the outlet of the gas cooler；The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the outlet of the desulfurization and decarburization tower are connected with the second entrance of the first gas heat exchanger；The first fine de-sulfur tower that entrance is connected with the second outlet of the gas heat exchanger；The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；JTZX type room temperature refined active carbon desulfurizers are filled with first fine de-sulfur tower and second fine de-sulfur tower.
Description
Technical field
The invention belongs to water-gas or semiwater gas desulphurizing technical field, and in particular to a kind of desulfurization of water gas method and its
System.
Background technology
It is many to be presently used for the sulfur removal technology of methanol benefit carbon water-gas, main method is exactly first to be hydrogenated with, hydrolyze organic sulfur
Inorganic sulfur is converted into, then by zinc oxide, iron oxide or activated carbon, removes hydrogen sulfide.Wherein hydrogenation has cobalt molybdenum hydrogenation and iron
Molybdenum is hydrogenated with, and is required for higher temperature；Hydrolysis divides ordinary-temp hydrolysis and medium temperature hydrolyzation, and medium temperature hydrolyzation needs 150~200 degree, normal-temperature water
Although solution can be relatively low with temperature, in the case where entrance organic sulfur is more than 50ppm, the percent hydrolysis of organic sulfur is not high.Zinc oxide,
Iron oxide, activated carbon removing hydrogen sulfide are run at normal temperatures substantially.Cool down after the so existing first temperature raising of sulfur removal technology presence
Problem, while technological process is grown, equipment is complicated, high energy consumption, and investment is big.
The content of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of desulfurization of water gas method and its system, this
The desulfurization of water gas system that invention provides carries out at a lower temperature, and technique is simple, and energy consumption is small.
The present invention provides a kind of desulfurization of water gas system, including：
Oil expeller；
The thick desulfurizing tower that entrance is connected with the outlet of the oil expeller；
The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；
The gas cooler that entrance is connected with the first outlet of the first gas heat exchanger；
The gas-liquid separator that entrance is connected with the outlet of the gas cooler；
The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the outlet of the desulfurization and decarburization tower with it is described
The second entrance of first gas heat exchanger is connected；
The first fine de-sulfur tower that entrance is connected with the second outlet of the gas heat exchanger；
The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；
JTZX type room temperature refined active carbon desulfurizers are provided with first fine de-sulfur tower and second fine de-sulfur tower.
Preferably, the 3rd fine de-sulfur tower that entrance is connected with second fine de-sulfur tower outlet, the 3rd essence are further included
JTZX type room temperature refined active carbon desulfurizers are provided with desulfurizing tower.
Preferably, the second gas being arranged between the first gas heat exchanger and the gas cooler is further included to change
Hot device, the first outlet of the first gas heat exchanger are connected with the entrance of the second gas heat exchanger, the second gas
The outlet of heat exchanger is connected with the entrance of the gas cooler.
Preferably, the cooling recirculation system being connected with the desulfurization and decarburization tower is further included, the cooling recirculation system includes：
The NHD coolers that entrance is connected with the second outlet of the desulfurization and decarburization tower；
The high pressure flash groove that entrance is connected with the outlet of the NHD coolers；
The low-pressure flashing tank that entrance is connected with the outlet of the high pressure flash groove；
The regenerator that entrance is connected with the outlet of the low-pressure flashing tank；
The circulating pump that entrance is connected with the outlet of the regenerator；
The ammonia cooler that entrance is connected with the outlet of the circulating pump, outlet and the desulfurization and decarburization tower of the ammonia cooler
Second entrance is connected.
Present invention also offers a kind of desulfurization of water gas method, comprise the following steps：
A sulfur-bearing water-gas) is passed sequentially through into oil expeller, thick desulfurizing tower, first gas heat exchanger, gas cooler, gas-liquid
After separator and desulfurization and decarburization tower are handled, reacting gas is obtained；
B) by the reacting gas by first gas heat exchanger after, then successively by the first fine de-sulfur tower carry out fine de-sulfur
Fine de-sulfur is carried out with the second fine de-sulfur tower, obtains desulfurization water-gas, in first fine de-sulfur tower and second fine de-sulfur tower
JTZX type room temperature refined active carbon desulfurizers are filled with respectively.
Preferably, the content of COS is 23~28mg/m in the reacting gas3, H2The content of S is 0mg/m3。
Preferably, after the reacting gas carries out fine de-sulfur by Second distillation column, essence is also carried out by third distillation column
Desulfurization, obtains desulfurization water-gas, is filled with JTZX type room temperature refined active carbon desulfurizers in the 3rd fine de-sulfur tower respectively.
Preferably, the temperature that first fine de-sulfur tower carries out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa；
The temperature that second fine de-sulfur tower carries out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa；
The temperature that 3rd fine de-sulfur tower carries out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa.
Preferably, in the desulfurization water-gas COS content ＜ 0.15mg/m3, H2The content of S is 0mg/m3。
Preferably, the sulfur-bearing water-gas includes following main component according to percentage by volume：
14.35%~16.43% CO2；
41.04%~42.51% CO；
39.33%~41.86% H2；
0.65%~0.88% CH4；
0.35%~0.68% N2；
0.21%~0.75% O2；
15.2~20mg/m is further included in the sulfur-bearing water-gas3H2S and 86~110mg/m3COS.
Compared with prior art, the present invention provides a kind of desulfurization of water gas system, including：Oil expeller；Entrance with it is described
The thick desulfurizing tower that the outlet of oil expeller is connected；The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；
The gas cooler that entrance is connected with the first outlet of the first gas heat exchanger；The outlet of entrance and the gas cooler
Connected gas-liquid separator；The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the desulfurization and decarburization tower
Outlet is connected with the second entrance of the first gas heat exchanger；Entrance be connected with the second outlet of the gas heat exchanger
One fine de-sulfur tower；The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；First fine de-sulfur tower and
JTZX type room temperature refined active carbon desulfurizers are filled with second fine de-sulfur tower.Desulfurization of water gas system gas provided by the invention
Body is directly entered the fine de-sulfur device for being filled with desulfurizing agent by gas heat exchanger after desulfurization and decarburization tower, in system
Equipment can complete step fine de-sulfur operation, equipment operates steadily, and technique is simple, and energy consumption is small under cryogenic without insulation.
The result shows that sulfur-bearing water-gas is after desulfurization of water gas system provided by the invention, the content ＜ of COS
0.15mg/m3, H2The content of S is 0mg/m3。
Brief description of the drawings
Fig. 1 is the structure diagram of desulfurization of water gas system provided by the invention.
Embodiment
The present invention provides a kind of desulfurization of water gas system, including：
Oil expeller；
The thick desulfurizing tower that entrance is connected with the outlet of the oil expeller；
The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；
The gas cooler that entrance is connected with the first outlet of the first gas heat exchanger；
The gas-liquid separator that entrance is connected with the outlet of the gas cooler；
The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the outlet of the desulfurization and decarburization tower with it is described
The second entrance of first gas heat exchanger is connected；
The first fine de-sulfur tower that entrance is connected with the second outlet of the gas heat exchanger；
The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；
JTZX type room temperature refined active carbon desulfurizers are filled with first fine de-sulfur tower and second fine de-sulfur tower.
Desulfurization of water gas system provided by the invention includes oil expeller, the oil expeller be used to remove water in water-gas,
Oil and dust-like material, so as to reduce the influence to back segment equipment.
Desulfurization of water gas system provided by the invention further includes the thick desulfurizing tower that entrance is connected with the outlet of the oil expeller,
The thick desulfurizing tower is used to tentatively remove the H in water-gas2S gases.
Desulfurization of water gas system provided by the invention further include that first entrance is connected with the outlet of the thick desulfurizing tower the
One gas heat exchanger.The first gas heat exchanger is used for the heat exchange of gas, so as to reduce heating and cooling system, reduces energy
Consumption.
Desulfurization of water gas system provided by the invention further includes the first outlet phase of entrance and the first gas heat exchanger
Gas cooler even, the gas cooler are used to cool down in water-gas, condensate liquid are obtained, so as to further realize water-gas
Purifying.
Preferably, desulfurization of water gas system provided by the invention further include be arranged at the first gas heat exchanger with it is described
Second gas heat exchanger between gas cooler, first outlet and the second gas of the first gas heat exchanger exchange heat
The entrance of device is connected, and the outlet of the second gas heat exchanger is connected with the entrance of the gas cooler.Water-gas passes through
After the three-level cooling of one gas heat exchanger, second gas heat exchanger and gas cooler, condensate liquid is obtained, further realizes water coal
The purifying of gas.
Desulfurization of water gas system provided by the invention further includes the gas-liquid that entrance is connected with the outlet of the gas cooler
Separator.Condensate liquid and the gas separation that the gas-liquid separator obtains gas cooler.
Desulfurization of water gas system provided by the invention further includes the desulfurization that entrance is connected with the outlet of the gas-liquid separator
Decarbonizing tower, NHD solution is provided with the desulfurization and decarburization tower, and the water-gas connects with the NHD solution adverse current in desulfurization and decarburization tower
Touch.H in water-gas2S and major part COS and CO2It is dissolved in NHD solution, gas comes out at the top of desulfurizing tower.
In the present invention, the outlet of the desulfurization and decarburization tower is connected with the second entrance of the first gas heat exchanger.
Preferably, the desulfurization and decarburization tower is also connected with cooling recirculation system, specifically, the cooling recirculation system bag
Include：
The NHD coolers that entrance is connected with the second outlet of the desulfurization and decarburization tower；
The high pressure flash groove that entrance is connected with the outlet of the NHD coolers；
The low-pressure flashing tank that entrance is connected with the outlet of the high pressure flash groove；
The regenerator that entrance is connected with the outlet of the low-pressure flashing tank；
The circulating pump that entrance is connected with the outlet of the regenerator；
The ammonia cooler that entrance is connected with the outlet of the circulating pump, outlet and the desulfurization and decarburization tower of the ammonia cooler
Second entrance is connected.
Desulfurization of water gas system provided by the invention further includes what entrance was connected with the second outlet of the gas heat exchanger
First fine de-sulfur tower.First fine de-sulfur tower can be that a fine de-sulfur tower can also be set using two fine de-sulfur tower parallel connections
Put, when the water-gas flow is larger, shunting processing can be carried out using two fine de-sulfur towers being arranged in parallel.Described first
JTZX type room temperature refined active carbon desulfurizers are filled with fine de-sulfur tower.Organic sulfur passes through reaction bed, is converted into hydrogen sulfide, then
Adsorbed and react generation elemental sulfur.
Desulfurization of water gas system provided by the invention further includes that entrance is connected with the outlet of first fine de-sulfur tower
Two fine de-sulfur towers.Second fine de-sulfur tower can be that a fine de-sulfur tower can also be arranged in parallel using two fine de-sulfur towers,
When the water-gas flow is larger, shunting processing can be carried out using two fine de-sulfur towers being arranged in parallel.Second essence
JTZX type room temperature refined active carbon desulfurizers are filled with desulfurizing tower.Second fine de-sulfur tower be used for further remove carbonyl sulfide and
The sulphur-containing substances such as thiophene, finally obtain desulfurization water-gas.
Preferably, desulfurization of water gas system provided by the invention further includes entrance and is connected with second fine de-sulfur tower outlet
The 3rd fine de-sulfur tower, be filled with JTZX type room temperature refined active carbon desulfurizers respectively in the 3rd fine de-sulfur tower.The essence is de-
The number of sulphur tower is related with the sulphur-containing substance in the water-gas of pre- desulfurization, in the present invention, it is preferred to including three fine de-sulfur towers, i.e.,
Respectively the first fine de-sulfur tower, the second fine de-sulfur tower and the 3rd fine de-sulfur tower.
In the present invention, in first fine de-sulfur tower, the loadings of the JTZX types room temperature refined active carbon desulfurizer
Preferably 13~15m3/ platform fine de-sulfur tower；In second fine de-sulfur tower, the JTZX types room temperature refined active carbon desulfurizer
Loadings are preferably 13~15m3/ platform fine de-sulfur tower；In the 3rd fine de-sulfur tower, the JTZX types room temperature active-carbon finely takes off
The loadings of sulphur agent are preferably 15~18m3/ platform fine de-sulfur tower.
Referring to Fig. 1, Fig. 1 is the structure diagram of desulfurization of water gas system provided by the invention.Water coal provided by the invention
Desulfurization system, including oil expeller；The thick desulfurizing tower that entrance is connected with the outlet of the oil expeller；First entrance slightly takes off with described
The first gas heat exchanger that the outlet of sulphur tower is connected；The second gas that entrance is connected with the first outlet of the first gas heat exchanger
Body heat exchanger, the gas cooler that entrance is connected with the outlet of the second gas heat exchanger；Entrance and the gas cooler
The connected gas-liquid separator in outlet；The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the desulfurization take off
The outlet of carbon tower is connected with the second entrance of the first gas heat exchanger；The second outlet phase of entrance and the gas heat exchanger
The first fine de-sulfur tower even；The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；Entrance and described the
The 3rd fine de-sulfur tower that the outlet of two fine de-sulfur towers is connected, first fine de-sulfur tower are provided with JTZX type room temperature active-carbon finelies and take off
Sulphur agent, the JTZX type room temperature refined active carbon desulfurizers that second fine de-sulfur tower is provided with, the 3rd fine de-sulfur tower are provided with
JTZX type room temperature refined active carbon desulfurizers.
The desulfurization and decarburization tower is also connected with cooling recirculation system, and the cooling recirculation system includes：Entrance takes off with described
The NHD coolers that the second outlet of sulphur decarbonizing tower is connected；The high pressure flash groove that entrance is connected with the outlet of the NHD coolers；
The low-pressure flashing tank that entrance is connected with the outlet of the high pressure flash groove；Entrance is connected again with the outlet of the low-pressure flashing tank
Raw tower；The circulating pump that entrance is connected with the outlet of the regenerator；The ammonia cooler that entrance is connected with the outlet of the circulating pump, institute
The outlet for stating ammonia cooler is connected with the second entrance of the desulfurization and decarburization tower.
Present invention also offers a kind of desulfurization of water gas method, comprise the following steps：
A sulfur-bearing water-gas) is passed sequentially through into oil expeller, thick desulfurizing tower, first gas heat exchanger, gas cooler, gas-liquid
After separator and desulfurization and decarburization tower are handled, reacting gas is obtained；
B) by the reacting gas by first gas heat exchanger after, then successively by the first fine de-sulfur tower carry out fine de-sulfur
Fine de-sulfur is carried out with the second fine de-sulfur tower, obtains desulfurization water-gas, in first fine de-sulfur tower and second fine de-sulfur tower
JTZX type room temperature refined active carbon desulfurizers are filled with respectively.
In the present invention, it is not specifically limited to the source of the sulfur-bearing water-gas, can be according to people in the art
Known to member prepared by the preparation method of water-gas.In the present invention, the sulfur-bearing water-gas preferably as follows into
It is prepared by row：
After vapor and oxygen mix, reacted with red-hot coke, obtain water-gas.
Specifically, 2.4~2.7Mpa pure oxygens from air separation unit are decompressed to 0.7~0.9Mpa through self-adjusting valve, send to 1.0
The first-level buffer tank of~1.6Mpa, then 0.1Mpa is decompressed to through self-adjusting valve, send to level 2 buffering tank self-regulated and be decompressed to 0.05Mpa,
With Gas-making Furnace give up pot heating after superheated steam and outer tube supplement steam after steam buffer tank by setting flow proportional carry out
After mixing, into Gas-making Furnace；
Evenly distributed through fire grate into ash bed, oxide layer, reduction zone, with red-hot coke gasification reaction, generate semiwater gas.
450~550 DEG C of above-mentioned semiwater gas is changed by being discharged at the top of Gas-making Furnace through cyclone separator dedusting, waste heat boiler
Heat is to 190~210 DEG C, and into each Gas-making Furnace aeration tower, cleaning dust, be cooled to 38~42 DEG C, is entered by gas main and cooled down
The further dedusting cooling of tower, H is removed subsequently into desulfurizing tower2Gas holder, the water coal that gas holder comes out are sent into after S and part organic sulfur
Gas, after the further dedusting of electrostatic precipitation tower, send the sulfur-bearing for water-gas compression section, obtaining desulfurization of water gas system to be entered
Water-gas.For the sulfur-bearing water-gas after compression, its pressure is 2.1~2.3MPa, and temperature is 38~42 DEG C.
Preferably, the sulfur-bearing water-gas includes following main component according to percentage by volume：
14.35%~16.43% CO2；
41.04%~42.51% CO；
39.33%~41.86% H2；
0.65%~0.88% CH4；
0.35%~0.68% N2；
0.21%~0.75% O2；
15.2~20mg/m is further included in the sulfur-bearing water-gas3H2S and 86~110mg/m3COS.
More there is choosing, the sulfur-bearing water-gas includes following main component according to percentage by volume：
15.0%~16.1% CO2；
41.50%~42.00% CO；
40.00%~41.50% H2；
0.70%~0.80% CH4；
0.40%~0.60% N2；
0.25%~0.70% O2；
15.2~18mg/m is further included in the sulfur-bearing water-gas3H2S and 86~100mg/m3COS.
The sulfur-bearing water-gas that the present invention is prepared is first by oil expeller, to remove the water in water-gas, oil and dust
Class material, so as to reduce the influence to back segment equipment.
After the sulfur-bearing water-gas is by oil expeller, then pass through thick desulfurizing tower, the preliminary H removed in water-gas2S gases.
After thick desulfurizing tower, the sulfur-bearing water-gas is cooled down by first gas heat exchanger and gas cooler
Cooling.Preferably, by the sulfur-bearing water-gas of first gas heat exchanger before gas cooler is entered, also by second gas
Heat exchanger.
In the present invention, condensate liquid and sulphurous water coal Jing Guo preliminary desulfurization are generated by the sulfur-bearing water-gas that cools
Gas.Above-mentioned condensate liquid and sulfur-bearing water-gas by preliminary desulfurization are after gas-liquid separator, by the sulphurous water of preliminary desulfurization
After coal gas is handled into desulfurization and decarburization tower, reacting gas is obtained.NHD solution is provided with the desulfurization and decarburization tower, it is described
Water-gas and the NHD solution counter current contactings in desulfurization and decarburization tower.H in water-gas2S and major part COS and CO2It is molten to be dissolved in NHD
In liquid, gas comes out at the top of desulfurizing tower.
The content of COS is preferably 23~28mg/m in the reacting gas3, more preferably 23~28mg/m3；The H2S's
Content is 0mg/m3。
The temperature of the reacting gas obtained after the processing of desulfurization and decarburization tower is preferably 10~15 DEG C, and more preferably 11~14
℃；Pressure is preferably 2.1~2.3MPa, more preferably 2.15~2.25MPa.
The reacting gas obtained after the processing of desulfurization and decarburization tower is back to first gas heat exchanger, with passing through thick desulfurizing tower
Sulfur-bearing water-gas carry out heat exchange.The reacting gas is after first gas heat exchanger carries out heat exchange, obtained reaction
Gas temperature is preferably 30~60 DEG C, and more preferably 35~55 DEG C, pressure is 2.1~2.3MPa, more preferably 2.15~
2.25MPa。
After the reacting gas is by first gas heat exchanger, then fine de-sulfur and the are carried out by the first fine de-sulfur tower successively
Two fine de-sulfur towers carry out fine de-sulfur, obtain desulfurization water-gas.In first fine de-sulfur tower and second fine de-sulfur tower respectively
It is filled with JTZX type room temperature refined active carbon desulfurizers.In the present invention, in first fine de-sulfur tower, the JTZX types room temperature
The loadings of refined active carbon desulfurizer are preferably 13~15m3/ platform fine de-sulfur tower.First fine de-sulfur tower carries out fine de-sulfur
Temperature is preferably 30~60 DEG C, and more preferably 35~55 DEG C, pressure is 2.1~2.3MPa, more preferably 2.15~2.25MPa；
Air speed is preferably 500~2000h-1, more preferably 700~1800h-1.After the first fine de-sulfur tower, in the reacting gas
The content of COS be preferably 9~12mg/m3, more preferably 10~11mg/m3；The H2The content of S is 0mg/m3。
Second fine de-sulfur tower is used to further remove the sulphur-containing substance such as carbonyl sulfide and thiophene, finally obtains desulfurization water coal
Gas.In second fine de-sulfur tower, the loadings of the JTZX types room temperature refined active carbon desulfurizer are preferably 13~15m3/ platform
Fine de-sulfur tower.The temperature that second fine de-sulfur tower carries out fine de-sulfur is preferably 30~60 DEG C, more preferably 35~55 DEG C, pressure
For 2.1~2.3MPa, more preferably 2.15~2.25MPa；Air speed is preferably 500~2000h-1, more preferably 700~1800h-1.After the second fine de-sulfur tower, the preferred ＜ 6mg/m of content of the COS in the reacting gas3, more preferably ＜ 0.15mg/m3,
The H2The content of S is 0mg/m3。
The number of the fine de-sulfur tower is related with the sulphur-containing substance in the water-gas of pre- desulfurization, in the present invention, it is preferred to also
Including the 3rd fine de-sulfur tower, JTZX type room temperature refined active carbon desulfurizers are filled with the 3rd fine de-sulfur tower respectively.Described
In 3rd fine de-sulfur tower, the loadings of the JTZX types room temperature refined active carbon desulfurizer are preferably 15~18m3/ platform fine de-sulfur tower.
The temperature that 3rd fine de-sulfur tower carries out fine de-sulfur is preferably 30~60 DEG C, more preferably 35~55 DEG C, pressure for 2.1~
2.3MPa, more preferably 2.15~2.25MPa；Air speed is preferably 500~2000h-1, more preferably 700~1800h-1.By
After 3rd fine de-sulfur tower, the content ＜ 0.15mg/m of the COS3, H2The content of S is 0mg/m3, i.e. the outlet of the 3rd fine de-sulfur tower
Total sulfur content is less than 0.1ppm.
Desulfurization of water gas system gas provided by the invention is directly entered after desulfurization and decarburization tower by gas heat exchanger
It is filled with the fine de-sulfur device of desulfurizing agent, it is de- can to complete step essence without insulation under cryogenic for the equipment in system
Sulphur operates, and equipment operates steadily, and technique is simple, and energy consumption is small.
The result shows that sulfur-bearing water-gas is after desulfurization of water gas system provided by the invention, the content ＜ of COS
0.10mg/m3, H2The content of S is 0mg/m3。
For a further understanding of the present invention, to desulfurization of water gas method provided by the invention and its it is with reference to embodiment
System illustrates, and protection scope of the present invention is not limited by the following examples.
Embodiment 1
Desulfurization of water gas system provided in this embodiment, including oil expeller；Entrance is connected with the outlet of the oil expeller
Thick desulfurizing tower；The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；Entrance and the first gas
The second gas heat exchanger that the first outlet of heat exchanger is connected, the gas that entrance is connected with the outlet of the second gas heat exchanger
Cooler；The gas-liquid separator that entrance is connected with the outlet of the gas cooler；The outlet of entrance and the gas-liquid separator
Connected desulfurization and decarburization tower, the outlet of the desulfurization and decarburization tower are connected with the second entrance of the first gas heat exchanger；Entrance
The first fine de-sulfur tower being connected with the second outlet of the gas heat exchanger, first fine de-sulfur tower are arranged in parallel including two
Fine de-sulfur tower；The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower, the second fine de-sulfur tower bag
Include two fine de-sulfur towers being arranged in parallel；The 3rd fine de-sulfur tower that entrance is connected with the outlet of second fine de-sulfur tower, it is described
First fine de-sulfur tower is provided with 15m3The JTZX type room temperature refined active carbon desulfurizers of/platform fine de-sulfur tower, second fine de-sulfur tower
It is provided with 15m3The JTZX type room temperature refined active carbon desulfurizers of/platform fine de-sulfur tower, the 3rd fine de-sulfur tower are provided with 18m3's
JTZX type room temperature refined active carbon desulfurizers.
The desulfurization and decarburization tower is also connected with cooling recirculation system, and the cooling recirculation system includes：Entrance takes off with described
The NHD coolers that the second outlet of sulphur decarbonizing tower is connected；The high pressure flash groove that entrance is connected with the outlet of the NHD coolers；
The low-pressure flashing tank that entrance is connected with the outlet of the high pressure flash groove；Entrance is connected again with the outlet of the low-pressure flashing tank
Raw tower；The circulating pump that entrance is connected with the outlet of the regenerator；The ammonia cooler that entrance is connected with the outlet of the circulating pump, institute
The outlet for stating ammonia cooler is connected with the second entrance of the desulfurization and decarburization tower.
Embodiment 2
By 1600m3The oxygen of 0.05Mpa mixed with the vapor of 3500kg after, reacted with the incandescent coke of 4500kg,
Generate 10000m3Water-gas.Wherein, 450~500 DEG C of the gas making furnace temperature, outlet pressure 5Kpa.
Contain 15.02% CO in the water-gas being prepared2；43.70% CO；35.81% H2；0.64%
CH4；3.41% N2；1.41% O2.Sulfur content in water-gas is 20mg/m3H2S and 100mg/m3COS.
Embodiment 3
Using embodiment 1 provide desulfurization of water gas system carry out desulfurization of water gas, by embodiment 2 prepare 8000~
10000m3/ h water-gas tentatively deviates from H through oil expeller and thick desulfurizing tower2S and the condensed water containing a small amount of oil droplet；Subsequently into
One gas heat exchanger, second gas exchanger and the cooling of gas cooler three-level are that the temperature of water-gas is down to less than 15 DEG C entrance
Desulfurization and decarburization tower, in the desulfurization and decarburization tower, water-gas is inversely contacted with low temperature NHD solution, the H in water-gas2S and big portion
Divide COS and CO2It is dissolved in NHD solution, obtains reacting gas.
The reacting gas sequentially enters first after out entering back into the heat exchange of the first gas heat exchanger from desulfurization and decarburization top of tower
Fine de-sulfur tower, the second fine de-sulfur tower and the 3rd fine de-sulfur tower carry out fine de-sulfur.
Wherein, the tolerance that reacting gas enters the first fine de-sulfur tower progress fine de-sulfur is 7000~9000m3/ h, organic sulfur
(COS) content：23~28mg/m3, the system pressure of fine de-sulfur is 2.0~2.1Mpa, and temperature is 28 DEG C.By the first fine de-sulfur
After tower fine de-sulfur, organic sulfur (COS) content is 10~12mg/m3。
After the first fine de-sulfur tower fine de-sulfur, gas enters the second fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 28 DEG C.After the second fine de-sulfur tower fine de-sulfur, measure organic sulfur (COS) content is 3
~4mg/m3。
After the second fine de-sulfur tower fine de-sulfur, gas enters the 3rd fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 28 DEG C.After the 3rd fine de-sulfur tower fine de-sulfur, desulfurization water-gas is obtained, measure is organic
Sulphur (COS) content is 0mg/m3, i.e. total sulfur content is 0mg/m3。
Embodiment 4
Using embodiment 1 provide desulfurization of water gas system carry out desulfurization of water gas, by embodiment 2 prepare 8000~
10000m3/ h water-gas tentatively deviates from H through oil expeller and thick desulfurizing tower2S and the condensed water containing a small amount of oil droplet；Subsequently into
One gas heat exchanger, second gas exchanger and the cooling of gas cooler three-level are that the temperature of water-gas is down to less than 15 DEG C entrance
Desulfurization and decarburization tower, in the desulfurization and decarburization tower, water-gas is inversely contacted with low temperature NHD solution, the H in water-gas2S and big portion
Divide COS and CO2It is dissolved in NHD solution, obtains reacting gas.
The reacting gas sequentially enters first after out entering back into the heat exchange of the first gas heat exchanger from desulfurization and decarburization top of tower
Fine de-sulfur tower, the second fine de-sulfur tower and the 3rd fine de-sulfur tower carry out fine de-sulfur.
Wherein, the tolerance that reacting gas enters the first fine de-sulfur tower progress fine de-sulfur is 7000~9000m3/ h, organic sulfur
(COS) content：23~28mg/m3, the system pressure of fine de-sulfur is 2.0~2.1Mpa, and temperature is 40 DEG C.By the first fine de-sulfur
After tower fine de-sulfur, organic sulfur (COS) content is 10~12mg/m3。
After the first fine de-sulfur tower fine de-sulfur, gas enters the second fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 40 DEG C.After the second fine de-sulfur tower fine de-sulfur, measure organic sulfur (COS) content is 6
~7mg/m3。
After the second fine de-sulfur tower fine de-sulfur, gas enters the 3rd fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 40 DEG C.After the 3rd fine de-sulfur tower fine de-sulfur, desulfurization water-gas is obtained, measure is organic
Sulphur (COS) content is less than 0.15mg/m3, i.e. total sulfur content is less than 0.15mg/m3。
Embodiment 5
Using embodiment 1 provide desulfurization of water gas system carry out desulfurization of water gas, by embodiment 2 prepare 8000~
10000m3/ h water-gas tentatively deviates from H through oil expeller and thick desulfurizing tower2S and the condensed water containing a small amount of oil droplet；Subsequently into
One gas heat exchanger, second gas exchanger and the cooling of gas cooler three-level are that the temperature of water-gas is down to less than 15 DEG C entrance
Desulfurization and decarburization tower, in the desulfurization and decarburization tower, water-gas is inversely contacted with low temperature NHD solution, the H in water-gas2S and big portion
Divide COS and CO2It is dissolved in NHD solution, obtains reacting gas.
The reacting gas sequentially enters first after out entering back into the heat exchange of the first gas heat exchanger from desulfurization and decarburization top of tower
Fine de-sulfur tower, the second fine de-sulfur tower and the 3rd fine de-sulfur tower carry out fine de-sulfur.
Wherein, the tolerance that reacting gas enters the first fine de-sulfur tower progress fine de-sulfur is 10000~15000m3/ h, it is organic
Sulphur (COS) content：23~28mg/m3, the system pressure of fine de-sulfur is 2.2~2.3Mpa, and temperature is 40 DEG C.It is de- by the first essence
After sulphur tower fine de-sulfur, organic sulfur (COS) content is 9~12mg/m3.
After the first fine de-sulfur tower fine de-sulfur, gas enters the second fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 40 DEG C.After the second fine de-sulfur tower fine de-sulfur, measure organic sulfur (COS) content is 5
~6mg/m3。
After the second fine de-sulfur tower fine de-sulfur, gas enters the 3rd fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 40 DEG C.After the 3rd fine de-sulfur tower fine de-sulfur, desulfurization water-gas is obtained, measure is organic
Sulphur (COS) content is less than 0.15mg/m3, i.e. total sulfur content is less than 0.15mg/m3。
Embodiment 6
Using embodiment 1 provide desulfurization of water gas system carry out desulfurization of water gas, by embodiment 2 prepare 8000~
10000m3/ h water-gas tentatively deviates from H through oil expeller and thick desulfurizing tower2S and the condensed water containing a small amount of oil droplet；Subsequently into
One gas heat exchanger, second gas exchanger and the cooling of gas cooler three-level are that the temperature of water-gas is down to less than 15 DEG C entrance
Desulfurization and decarburization tower, in the desulfurization and decarburization tower, water-gas is inversely contacted with low temperature NHD solution, the H in water-gas2S and big portion
Divide COS and CO2It is dissolved in NHD solution, obtains reacting gas.
The reacting gas sequentially enters first after out entering back into the heat exchange of the first gas heat exchanger from desulfurization and decarburization top of tower
Fine de-sulfur tower, the second fine de-sulfur tower and the 3rd fine de-sulfur tower carry out fine de-sulfur.
Wherein, the tolerance that reacting gas enters the first fine de-sulfur tower progress fine de-sulfur is 16000~20000m3/ h, it is organic
Sulphur (COS) content：23~28mg/m3, the system pressure of fine de-sulfur is 2.2~2.3Mpa, and temperature is 50 DEG C.It is de- by the first essence
After sulphur tower fine de-sulfur, organic sulfur (COS) content is 9~12mg/m3。
After the first fine de-sulfur tower fine de-sulfur, gas enters the second fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 50 DEG C.After the second fine de-sulfur tower fine de-sulfur, measure organic sulfur (COS) content is 5
~6mg/m3。
After the second fine de-sulfur tower fine de-sulfur, gas enters the 3rd fine de-sulfur tower and carries out fine de-sulfur, the system of fine de-sulfur
Pressure is 2.0~2.1Mpa, and temperature is 50 DEG C.After the 3rd fine de-sulfur tower fine de-sulfur, desulfurization water-gas is obtained, measure is organic
Sulphur (COS) content is less than 0.15mg/m3, i.e. total sulfur content is less than 0.15mg/m3。
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. desulfurization of water gas system, it is characterised in that including：Oil expeller；The thick desulfurizing tower that entrance is connected with the outlet of the oil expeller；The first gas heat exchanger that first entrance is connected with the outlet of the thick desulfurizing tower；The gas cooler that entrance is connected with the first outlet of the first gas heat exchanger；The gas-liquid separator that entrance is connected with the outlet of the gas cooler；The desulfurization and decarburization tower that entrance is connected with the outlet of the gas-liquid separator, the outlet of the desulfurization and decarburization tower and described first The second entrance of gas heat exchanger is connected；The first fine de-sulfur tower that entrance is connected with the second outlet of the gas heat exchanger；The second fine de-sulfur tower that entrance is connected with the outlet of first fine de-sulfur tower；JTZX type room temperature refined active carbon desulfurizers are provided with first fine de-sulfur tower and second fine de-sulfur tower.
- 2. desulfurization of water gas system according to claim 1, it is characterised in that further include entrance and second fine de-sulfur Tower exports the 3rd connected fine de-sulfur tower, and JTZX type room temperature refined active carbon desulfurizers are provided with the 3rd fine de-sulfur tower.
- 3. desulfurization of water gas system according to claim 1, it is characterised in that further include and be arranged at the first gas and change Second gas heat exchanger between hot device and the gas cooler, the first outlet of the first gas heat exchanger and described the The entrance of two gas heat exchangers is connected, and the outlet of the second gas heat exchanger is connected with the entrance of the gas cooler.
- 4. desulfurization of water gas system according to claim 1, it is characterised in that further include and be connected with the desulfurization and decarburization tower Cooling recirculation system, the cooling recirculation system includes：The NHD coolers that entrance is connected with the second outlet of the desulfurization and decarburization tower；The high pressure flash groove that entrance is connected with the outlet of the NHD coolers；The low-pressure flashing tank that entrance is connected with the outlet of the high pressure flash groove；The regenerator that entrance is connected with the outlet of the low-pressure flashing tank；The circulating pump that entrance is connected with the outlet of the regenerator；The ammonia cooler that entrance is connected with the outlet of the circulating pump, the outlet of the ammonia cooler and the second of the desulfurization and decarburization tower Entrance is connected.
- A kind of 5. desulfurization of water gas method, it is characterised in that comprise the following steps：A sulfur-bearing water-gas) is passed sequentially through into oil expeller, thick desulfurizing tower, first gas heat exchanger, gas cooler, gas-liquid separation After device and desulfurization and decarburization tower are handled, reacting gas is obtained；B) by the reacting gas by first gas heat exchanger after, then carry out fine de-sulfur and the by the first fine de-sulfur tower successively Two fine de-sulfur towers carry out fine de-sulfur, obtain desulfurization water-gas, and first fine de-sulfur tower and second fine de-sulfur tower are interior respectively It is filled with JTZX type room temperature refined active carbon desulfurizers.
- 6. according to the method described in claim 5, it is characterized in that, the content of COS is 23~28mg/m in the reacting gas3, H2The content of S is 0mg/m3。
- 7. according to the method described in claim 5, it is characterized in that, the reacting gas carries out fine de-sulfur by Second distillation column Afterwards, fine de-sulfur is also carried out by third distillation column, obtains desulfurization water-gas, JTZX is filled with respectively in the 3rd fine de-sulfur tower Type room temperature refined active carbon desulfurizer.
- 8. according to the method described in claim 5~7 any one claim, it is characterised in that first fine de-sulfur tower The temperature for carrying out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa；The temperature that second fine de-sulfur tower carries out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa；The temperature that 3rd fine de-sulfur tower carries out fine de-sulfur is 30~60 DEG C, and pressure is 2.1~2.3MPa.
- 9. according to the method described in claim 5~7 any one claim, it is characterised in that in the desulfurization water-gas The content ＜ 0.15mg/m of COS3, H2The content of S is 0mg/m3。
- 10. according to the method described in claim 5, it is characterized in that, the sulfur-bearing water-gas according to percentage by volume include with Lower main component：14.35%~16.43% CO2；41.04%~42.51% CO；39.33%~41.86% H2；0.65%~0.88% CH4；0.35%~0.68% N2；0.21%~0.75% O2；15.2~20mg/m is further included in the sulfur-bearing water-gas3H2S and 86~110mg/m3COS.
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