CN107686752A - Two-stage hydrodesulfurization unit - Google Patents
Two-stage hydrodesulfurization unit Download PDFInfo
- Publication number
- CN107686752A CN107686752A CN201710876524.0A CN201710876524A CN107686752A CN 107686752 A CN107686752 A CN 107686752A CN 201710876524 A CN201710876524 A CN 201710876524A CN 107686752 A CN107686752 A CN 107686752A
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- Prior art keywords
- reactor
- heat exchanger
- hydrogenator
- fine
- air inlet
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Classifications
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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
-
- 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
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The invention belongs to technical field of desulfurization.Present invention solves the technical problem that it is：Existing desulfurizer coking phenomenon is serious, influences device normal operation.The technical scheme is that：Two-stage hydrodesulfurization unit, including heat exchanger, pre-hydrogenator, one-level hydrogenation reactor, thick desulfurization reactor, thermosistor, secondary hydrogenation reactor and fine de-sulfur reactor, oven gas air inlet and gas outlet are respectively equipped with the two side of heat exchanger, the top of heat exchanger is provided with fine gas air inlet, pre-hydrogenator, one-level hydrogenation reactor, thick desulfurization reactor, thermosistor, secondary hydrogenation reactor and fine de-sulfur reactor are sequentially connected, the air inlet of pre-hydrogenator is connected with the gas outlet of heat exchanger, the gas outlet of fine de-sulfur reactor is connected with the fine gas air inlet of heat exchanger.The invention has the advantages that two-stage hydrodesulfurization unit energy is continuous, even running, desulfurized effect is good.
Description
Technical field
The invention belongs to technical field of desulfurization, and in particular to a kind of two-stage hydrodesulfurization unit.
Background technology
Dry desulfurization is using the hydrogen sulfide in solid absorbent removing coal gas, uses fixed bed principle more, simple to operate
Reliably, desulfurization precision is high, but treating capacity is small, suitable for the processing of lean sulphurous gas, is typically used for secondary fine de-sulfur.Desulfurization
Technical bottleneck be how deep removal complex shape, be difficult to conventional method decompose removing organic sulfur.Organic sulfur conversion has three
Kind method：Pyrolysismethod, Hydrolyze method and hydroconversion process.Pyrolysismethod by conversion temperature, it is thermally equilibrated have a great influence, it is less to adopt
With.Hydrolyze method operation temperature is middle low temperature, and side reaction is few, is to remove the research that organic sulfur is very active in coal gas both at home and abroad at present
Field.But the increase of oxygen content in the rise of the activity with temperature of hydrolyst and coal gas and drastically decline, in coal gas
Thiophene, thioether, mercaptan do not play transformation substantially.At present, only Organic sulfur hydro-conversion method is that relatively economical is reliably ripe
Technology.
Traditional organic sulfur hydrodesulfurization unit is one-level or secondary hydrogenation desulfurizer, and one-level hydrogenation plant flow is short,
Small investment, but purifying rate is low；Secondary hydrogenation device high conversion rate, but cycle length, disposably input is big for catalyst.And by
It is serious in coking phenomenon of the larger molecular organicses such as tar, naphthalene in hydrogenation reactor, influence the normal fortune of hydrodesulfurization unit
OK.
The content of the invention
It is an object of the invention to provide a kind of two-stage hydrodesulfurization unit, the two-stage hydrodesulfurization unit can have been prevented effectively
The generation of machine thing coking phenomenon in hydrogenation reactor.
To achieve the above object, the present invention adopts the following technical scheme that：
Two-stage hydrodesulfurization unit of the present invention, including heat exchanger, pre-hydrogenator, one-level hydrogenation reactor, thick desulfurization
Reactor, thermosistor, secondary hydrogenation reactor and fine de-sulfur reactor, oven gas is respectively equipped with the two side of heat exchanger and is entered
Gas port and gas outlet, the top of heat exchanger are provided with fine gas air inlet, pre-hydrogenator, one-level hydrogenation reactor, slightly taken off
Reaction of Salmon-Saxl device, thermosistor, secondary hydrogenation reactor and fine de-sulfur reactor are sequentially connected, the air inlet of pre-hydrogenator with
The gas outlet of heat exchanger is connected, and the gas outlet of fine de-sulfur reactor is connected with the fine gas air inlet of heat exchanger.
The invention difference from existing technology is：First, increase pre-add between one-level hydrogenation reactor and heat exchanger
Hydrogen reactor, so, reaction heat are concentrated mainly on pre-hydrogenator, so as to which one-level hydrogenation reactor reaction heat reduces, and
So that the coking in pre-hydrogenator of the larger molecular organicses such as tar, naphthalene, avoids influenceing one-level hydrogenation reactor, is effectively ensured
The normal operation of hydrodesulfurization unit；Second, installing thermosistor between thick desulfurization reactor and secondary hydrogenation reactor, use
Thermosistor adjusts and stablizes secondary hydrogenation reactor inlet temperature, ensures secondary hydrogenation, fine de-sulfur reactor smooth operation, in order to avoid
Influence desulfurized effect.
As the improvement of the present invention, in addition to oxygen reactor is removed, except the inlet end of oxygen reactor and the gas outlet of heat exchanger
It is connected, except the outlet side of oxygen reactor is connected with the air inlet of pre-hydrogenator.
Due to the unstability of coke oven production, easily there is larger fluctuation in the oxygen content in oven gas, this to prevent
The generation of the imagination, introducing remove oxygen reactor.
As the improvement of the present invention, pre-hydrogenator is iron molybdenum pre-hydrogenator.
One-level hydrogenation in, due to largely can reaction raw materials exist, temperature rise is larger, therefore, catalyst used for plus
The iron molybdenum hydrogenation catalyst that Hydrogen Energy power is relatively weak but the side reaction such as methanation is few.
As the improvement of the present invention, the quantity of pre-hydrogenator is two.
Two pre- hydrogenation conversion reactors, one open it is one standby, primarily to ensureing the normal, continuous of one-level hydrogenation reactor
Operation.
In summary, the beneficial effects of the invention are as follows：Two-stage hydrodesulfurization unit energy is continuous, even running, desulfurized effect
It is good.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Embodiment
Embodiment, as shown in figure 1, two-stage hydrodesulfurization unit, including heat exchanger 1, pre-hydrogenator 2, one-level hydrogenation
Reactor 3, thick desulfurization reactor 4, thermosistor 5, secondary hydrogenation reactor 6 and fine de-sulfur reactor 7, the both sides of heat exchanger 1
Oven gas air inlet and gas outlet are respectively equipped with wall, the top of heat exchanger 1 is provided with fine gas air inlet, pre-hydrogenator
2nd, one-level hydrogenation reactor 3, thick desulfurization reactor 4, thermosistor 5, secondary hydrogenation reactor 6 and fine de-sulfur reactor 7 be sequentially
It is connected, the air inlet of pre-hydrogenator 2 is connected with the gas outlet of heat exchanger 1, the gas outlet of fine de-sulfur reactor 7 and heat exchanger
1 fine gas air inlet is connected.
To prevent the oxygen content in oven gas from larger fluctuation occur, present invention additionally comprises except oxygen reactor 8, deoxygenation reaction
The inlet end of device 8 is connected with the gas outlet of heat exchanger 1, outlet side and the air inlet phase of pre-hydrogenator 2 except oxygen reactor 8
Even.
Pre-hydrogenator 2 of the present invention is iron molybdenum pre-hydrogenator.
In order to ensure normal, the continuous operation of one-level hydrogenation reactor, the quantity of pre-hydrogenator 2 is two, and one opens
One is standby.
Hydrogenation plant temperature rise is influenceed by the content and micro amount of oxygen of organic sulfur, unsaturated hydrocarbon content, and with catalyst
Selection species and loadings have direct relation.Control is hydrogenated with temperature rise and is considered as at 2 points from hydrogenation catalyst, first, can add
The material content of hydrogen, second, catalyst activity.In one-level hydrogenation reactor, due to largely can reaction raw materials exist, temperature rise
Larger, therefore, catalyst used is the iron molybdenum hydrogenation catalyst that hydrogenation capability is relatively weak but the side reaction such as methanation is few；
Secondary hydrogenation reactor because can hydrogenation products it is less, temperature rise is smaller, can use the higher cobalt molybdenum of hydrogenation activity.In addition, essence is de-
Reaction of Salmon-Saxl device preheating material gas of working off one's feeling vent one's spleen can effectively save preheating furnace fuel consumption.
What the present invention did not made to illustrate uses prior art.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (4)
1. two-stage hydrodesulfurization unit, it is characterised in that including heat exchanger (1), pre-hydrogenator (2), one-level hydrogenation reaction
Device (3), thick desulfurization reactor (4), thermosistor (5), secondary hydrogenation reactor (6) and fine de-sulfur reactor (7), heat exchanger
(1) oven gas air inlet and gas outlet are respectively equipped with two side, the top of heat exchanger (1) is provided with fine gas air inlet,
Pre-hydrogenator (2), one-level hydrogenation reactor (3), thick desulfurization reactor (4), thermosistor (5), secondary hydrogenation reactor (6)
And fine de-sulfur reactor (7) is sequentially connected, the air inlet of pre-hydrogenator (2) is connected with the gas outlet of heat exchanger (1), essence
The gas outlet of desulfurization reactor (7) is connected with the fine gas air inlet of heat exchanger (1).
2. two-stage hydrodesulfurization unit as claimed in claim 1；Characterized in that, also including removing oxygen reactor (8), deoxygenation is anti-
The inlet end of device (8) is answered to be connected with the gas outlet of heat exchanger (1), except outlet side and the pre-hydrogenator (2) of oxygen reactor (8)
Air inlet be connected.
3. two-stage hydrodesulfurization unit as claimed in claim 1 or 2；Characterized in that, pre-hydrogenator (2) is that iron molybdenum is pre-
Hydrogenation reactor.
4. two-stage hydrodesulfurization unit as claimed in claim 1 or 2；Characterized in that, the quantity of pre-hydrogenator (2) is
Two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876524.0A CN107686752A (en) | 2017-09-25 | 2017-09-25 | Two-stage hydrodesulfurization unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876524.0A CN107686752A (en) | 2017-09-25 | 2017-09-25 | Two-stage hydrodesulfurization unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107686752A true CN107686752A (en) | 2018-02-13 |
Family
ID=61155328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710876524.0A Withdrawn CN107686752A (en) | 2017-09-25 | 2017-09-25 | Two-stage hydrodesulfurization unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107686752A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977233A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of method of coke-stove gas deoxygenation fine de-sulfur |
| CN109181765A (en) * | 2018-09-13 | 2019-01-11 | 大庆亿鑫化工股份有限公司 | A kind of multistage hydrodesulfurization equipment and its operating method |
| CN112391209A (en) * | 2020-11-17 | 2021-02-23 | 滨州中科催化技术有限公司 | Desulfurization method of coke oven gas |
-
2017
- 2017-09-25 CN CN201710876524.0A patent/CN107686752A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977233A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of method of coke-stove gas deoxygenation fine de-sulfur |
| CN108977233B (en) * | 2018-07-25 | 2020-06-23 | 戴乐亭 | Method for deoxidizing and fine desulfurizing coke oven gas |
| CN109181765A (en) * | 2018-09-13 | 2019-01-11 | 大庆亿鑫化工股份有限公司 | A kind of multistage hydrodesulfurization equipment and its operating method |
| CN112391209A (en) * | 2020-11-17 | 2021-02-23 | 滨州中科催化技术有限公司 | Desulfurization method of coke oven gas |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180213 |