CN108404818A - Methanol to olefins reaction system - Google Patents
Methanol to olefins reaction system Download PDFInfo
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- CN108404818A CN108404818A CN201810102554.0A CN201810102554A CN108404818A CN 108404818 A CN108404818 A CN 108404818A CN 201810102554 A CN201810102554 A CN 201810102554A CN 108404818 A CN108404818 A CN 108404818A
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- methanol
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- separating device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/005—Separating solid material from the gas/liquid stream
- B01J8/0055—Separating solid material from the gas/liquid stream using cyclones
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00327—Controlling the temperature by direct heat exchange
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides a kind of methanol to olefins reaction systems.The methanol to olefins reaction system includes methanol to olefins reaction device and gas-solid separating device.Gas-solid separating device is provided with olefin product outlet, and gas-solid separating device is arranged in the inside of methanol to olefins reaction device, and olefin product outlet is connected with the arrival end of gas-solid separating device；Methanol to olefins reaction device forms heat exchange structure with gas-solid separating device, to be cooled down to the olefin product gas separated from gas-solid separating device.Methanol feedstock gas can absorb the heat of the olefin product system high temperature olefin product gas in gas-solid separating device, realize that olefin product gas exchanges heat with methanol to olefins reaction device, this can reduce the temperature of olefin product gas, to advantageously reduce the risk of the heat exchanger coking in follow-up flow path, its heat transfer effect is improved；Since material benzenemethanol is heated up using the heat of olefin product gas, the selectivity of methanol to olefins reaction is improved.
Description
Technical field
The present invention relates to methanol-to-olefins fields, in particular to a kind of methanol to olefins reaction system.
Background technology
Methanol-to-olefins technology (MTO) mainly have Dalian Inst of Chemicophysics, Chinese Academy of Sciences DMTO technologies,
The SMTO technologies of Sinopec Group, the MTO technologies of Uop Inc. of the U.S..Three kinds of technologies have realized industrialization at home.
In DMTO techniques, the temperature that product gas goes out reactor is higher (450 DEG C or more), and hydrocarbons can occur in product gas
Coking reaction and side reaction.The thus meeting coking when above-mentioned high-temperature product gas is by product gas and heat exchange of methanol device, and then cause
The heat transfer coefficient of product gas and heat exchange of methanol device (vertical heat exchanger) reduces and heat transfer effect is poor.And product gas and heat exchange of methanol device
Heat transfer effect difference can cause by the gas-phase methanol temperature of product gas and heat exchange of methanol device only have about 120 DEG C, into reactor
Afterwards, gas-phase methanol needs to consume the reaction temperature that a large amount of reaction heat can be only achieved needs.Heat transfer effect difference can also be to drop simultaneously
Low energy consumption and raising olefine selective have prodigious limitation.
Invention content
The main purpose of the present invention is to provide a kind of methanol to olefins reaction systems, to solve existing methanol-to-olefins
Product gas leads to the problem of its heat transfer effect difference with the easy coking of heat exchange of methanol device in reaction system.
To achieve the goals above, the present invention provides a kind of reaction systems of methanol-to-olefins, including：Methanol-to-olefins
Reaction unit is provided with olefin product outlet；Gas-solid separating device is arranged in the inside of methanol to olefins reaction device, and alkene
Hydrocarbon products outlet is connected with the arrival end of gas-solid separating device；Methanol to olefins reaction device is changed with gas-solid separating device formation
Heat structure, to be cooled down to the olefin product gas separated from gas-solid separating device.
Further, methanol to olefins reaction device includes：Methanol storage room, is provided with feed inlet；Reative cell, reative cell
It is provided with methanol inlet and olefin product outlet, reative cell is connected with methanol storage room by methanol inlet, at least partly gas
Solid separation device is arranged in the inside of methanol storage room.
Further, methanol intake line is provided in methanol storage room, feed inlet is connected with methanol intake line, portion
The coiling of methanol intake line is divided to be arranged in the outside of gas-solid separating device.
Further, gas-solid separating device is cyclone separator or quick disconnector.
Further, gas-solid separating device includes separation unit and coupled logical dipleg, and separation unit setting is stored up in methanol
It deposits in room, and separation unit is connected with olefin product outlet, at least partly dipleg is arranged in the reaction chamber.
Further, dipleg is bellows.
Further, gas-solid separating device further includes dipleg casing, and dipleg casing is set in the outside of dipleg.
Further, it is provided with wearing layer on dipleg；Preferably, wearing layer is selected from concrete layer, ceramic layer or silicon carbide
Layer.
Further, it is provided with fin on the outer wall of gas-solid separating device.
Further, methanol to olefins reaction device further includes partition board, and partition board is set to the inside of methanol storage room, and
On the axis direction of methanol storage room, partition board is arranged below the free end of methanol intake line.
Further, insulated gas is filled between partition board and the reative cell being disposed below.
Further, one or more in mixed gas, propane and ethane of the insulated gas selected from methane and hydrogen.
It applies the technical scheme of the present invention, gas-solid separating device is arranged at the inside of methanol to olefins reaction device, no
The pressure-bearing problem of consideration equipment is needed, thus the wall thickness of gas-solid separating device is smaller, this can realize that methanol to olefins reaction fills
Set effective heat exchange between gas-solid separating device.In methanol to olefins reaction system provided by the invention, by methanol-to-olefins
Reaction unit forms heat exchange structure with gas-solid separating device, and methanol feedstock gas can absorb the olefin product in gas-solid separating device
The heat of system high temperature olefin product gas realizes that olefin product gas exchanges heat with methanol to olefins reaction device, this can
The temperature for reducing olefin product gas improves its heat exchange effect to advantageously reduce the risk of the heat exchanger coking in follow-up flow path
Fruit；Simultaneously as material benzenemethanol is heated up using the heat of olefin product gas, therefore avoid the reaction for absorbing methanol-to-olefins
Heat, and then improve the selectivity of methanol to olefins reaction.In addition, after heat exchange, methanol to olefins reaction device can be saved
The part energy consumption of middle raw material gas lift to reaction temperature reduces the generation of side reaction to be conducive to shorten the reaction time.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the knot of the reaction system for the methanol-to-olefins that a kind of typical embodiment according to the present invention provides
Structure schematic diagram；
Fig. 2 shows according to another preferred reaction system for implementing the methanol-to-olefins that embodiment provides of the invention
Structural schematic diagram.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, methanol to olefins reaction device；11, methanol storage room；12, reative cell；20, gas-solid separating device；21, it detaches
Portion；22, dipleg；23, dipleg casing；30, partition board.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As described in background technology, product gas is easily tied with heat exchange of methanol device in existing methanol to olefins reaction device
Coke leads to the problem of its heat transfer effect difference.In order to solve the above technical problem, the present invention provides a kind of the anti-of methanol-to-olefins
System is answered, as shown in Figure 1, including methanol to olefins reaction device 10 and gas-solid separating device 20, methanol to olefins reaction device
10 include that olefin product exports 121.Gas-solid separating device 20 is arranged in the inside of methanol to olefins reaction device 10, and alkene produces
Object outlet 121 is connected to the arrival end of gas-solid separating device 20.Methanol to olefins reaction device 10 and 20 shape of gas-solid separating device
At heat exchange structure, to be cooled down to the olefin product gas separated from gas-solid separating device 20.
It is mingled with solid particle in product gas due to completing methanol to olefins reaction, thus needs to fill by gas solid separation
20 are set to detach product gas.And since the said goods gas has higher temperature, olefin product temperature degree is higher to be easy to cause production
The risk of product gas and heat exchange of methanol device coking.
Gas-solid separating device 20 is arranged at the inside of methanol to olefins reaction device 10, without the concern for the pressure-bearing of equipment
Problem, thus the wall thickness of gas-solid separating device 20 is smaller, this can realize that methanol to olefins reaction device 10 is filled with gas solid separation
Set effective heat exchange between 20.In methanol to olefins reaction system provided by the invention, by methanol to olefins reaction device 10 with
Gas-solid separating device 20 forms heat exchange structure, and methanol feedstock gas can absorb in the olefin product system in gas-solid separating device 20
The heat of high temperature olefin product gas realizes that olefin product gas exchanges heat with methanol to olefins reaction device 10, this can be reduced
The temperature of olefin product gas improves its heat transfer effect to advantageously reduce the risk of the heat exchanger coking in follow-up flow path；Together
When, since material benzenemethanol is heated up using the heat of olefin product gas, the reaction heat for absorbing methanol-to-olefins is avoided, into
And improve the selectivity of methanol to olefins reaction.In addition, after heat exchange, 10 Central Plains of methanol to olefins reaction device can be saved
Expect that gas lift reduces the generation of side reaction to the part energy consumption of reaction temperature to be conducive to shorten the reaction time.
In the actual production process, the temperature of product gas is preferably down to 400 DEG C.It cools the temperature in above-mentioned temperature range
Be conducive to further decrease hydrocarbons in product gas and coking reaction occurs, to further increase changing for product gas/methanol gas
Thermal effect improves heat recovery efficiency.
In above-mentioned methanol to olefins reaction system, as long as methanol intake line 101 and the formation of gas-solid separating device 20 are changed
Heat structure can be realized as methanol gas and the heat transfer process of product gas, reduce coking risk.
In a preferred embodiment, as shown in Figure 1, methanol to olefins reaction device 10 includes methanol storage room 11
With reative cell 12.Methanol storage room 11 is provided with feed inlet 111, which is connected with methanol intake line 101.Instead
Room 12 is answered to be provided with olefin product outlet 121 and methanol inlet 122, reative cell 12 passes through methanol inlet with methanol storage room 11
122 are connected, and at least partly the gas-solid separating device 20 is arranged in the inside of the methanol storage room 11.
At least partly gas-solid separating device 20 is arranged in the inside of methanol storage room 11, thus enters methanol storage room 11
Methanol gas can exchange heat with gas-solid separating device 20, this can effectively reduce the temperature of olefin product gas, after reducing
The risk of continuous heat exchanger coking.
In a preferred embodiment, methanol intake line 101 extends to methanol storage room 11 through feed inlet 111
Inside, and part methanol intake line 101 coils the outside for being set to gas-solid separating device 20.By 101 disk of methanol intake line
Around the outside for being set to gas-solid separating device 20, this aspect can make the methanol gas in methanol intake line 101 and gas-solid point
From device carry out first time heat exchange, and be filled in the methanol gas inside methanol storage room 11 can also with gas-solid separating device 20 into
Second of heat exchange of row, is conducive to further increase the heat exchange of methanol feedstock gas and olefin product gas by above-mentioned heat transfer process twice
Degree, to further decrease the risk of heat exchanger coking.
In above-mentioned methanol to olefins reaction system, gas-solid separating device 20 can select gas solid separation commonly used in the art to fill
Set 20.In a preferred embodiment, gas-solid separating device 20 includes but not limited to cyclone separator.Above-mentioned gas solid separation
Device 20 has larger external surface area, thus above-mentioned gas-solid separating device 20 is selected to exchange heat with methanol gas for product gas
When, be conducive to the heat exchange efficiency for further increasing product gas and methanol gas, to further decrease product gas and heat exchange of methanol device
The risk of coking reduces the energy consumption of heating methanol gas and reduces the generation of side reaction.
In a preferred embodiment, above-mentioned gas-solid separating device 20 is cyclone separator, as shown in Figure 1, it is wrapped
Separation unit 21 and coupled logical dipleg 22 are included, separation unit 21 is arranged in methanol storage room 11, and separation unit 21 and alkene
Product exit 121 is connected, and at least partly dipleg 22 is arranged in reative cell 12.Material is less in dipleg 22, therefore for thermal energy
Force difference, cause in dipleg 22 catalyst be susceptible to temperature it is too low and and the phenomenon that mud.Part dipleg 22 is arranged in reative cell
In 12, catalyst can be heated using the reaction heat of reative cell 12, and then be conducive to avoid the occurrence of catalyst and mud
Phenomenon.
In a preferred embodiment, when gas-solid separating device 20 is cyclone separator, gas-solid separating device 20
Including dipleg 22, and dipleg 22 is bellows.Bellows has preferable heat insulation effect, is urged to advantageously reduce in dipleg 22
Agent occurs and the risk of mud because temperature is too low.
In a preferred embodiment, as shown in Figure 1, when gas-solid separating device 20 is cyclone separator, packet
Dipleg 22 and dipleg casing 23 are included, dipleg casing 23 is set in the outside of dipleg 22.In 22 outside of dipleg, dipleg casing 23 is set,
The heat insulating ability for being conducive to further increase dipleg 22 avoids the occurrence of to be conducive to inhibit to exchange heat between methanol gas and dipleg 22
Oil gas condensation leads to the phenomenon that catalyst and mud.
In a preferred embodiment, it is provided with wearing layer on the inner wall of dipleg 22.Preferably, wearing layer include but
It is not limited to concrete layer, ceramic layer or silicon carbide layer.The thermal resistance of above-mentioned material is big, of low cost, thus uses above-mentioned material shape
Be conducive to improve the service life of dipleg 22 at wearing layer.
When gas-solid separating device 20 is cyclone separator, preferably fin is provided on cyclone separator outer wall.It is revolving
It is provided with the heat transfer efficiency that fin is conducive to further increase cyclone separator on wind separator outer wall, and then improves product gas
With the heat exchange efficiency of methanol gas.
In above-mentioned methanol to olefins reaction system, methanol to olefins reaction device 10 and the formation of gas-solid separating device 20 are changed
Heat structure not only improves the coking risk for reducing product gas and methanol gas heat exchanger, while also helping reduction methanol gas heating
Energy consumption.In a preferred embodiment, as shown in Fig. 2, above-mentioned reaction system further includes partition board 30, which is set to
The inside of methanol storage room 11, and on the axis direction of methanol storage room 11, partition board 30 is arranged in methanol intake line 101
The lower section of outlet end.Lower section setting partition board 30 in the free end of methanol intake line 101 is conducive to inhibit methanol gas and dipleg
22 exchange heat, to be conducive to further suppress the reduction of 22 temperature of dipleg.
In a preferred embodiment, reaction system further includes reaction member, partition board 30 be disposed below it is anti-
It answers and is filled with insulated gas between room.The characteristic that insulated gas has resistance to heat big, thus between partition board 30 and reaction member
Stuffed heat insulated gas is conducive to further inhibit the loss of temperature in dipleg 22.
In a preferred embodiment, above-mentioned insulated gas include but not limited to methane and hydrogen mixed gas,
It is one or more in propane and ethane etc..Above-mentioned gas and participation methanol to olefins reaction, thus above-mentioned gas is selected to carry out
Filling can further suppress the reduction of 22 temperature of dipleg, while methanol to olefins reaction not made to generate new side reaction.
When gas-solid separating device 20 be cyclone separator when, can preferably be arranged on the inner wall of cyclone separator thermal resistance compared with
Small insulating and wearing-resistant lining, or it is not provided with lining.When being provided with insulating and wearing-resistant lining on the inner wall of gas-solid separating device 20,
It is preferred that the thickness of lining is 10~30mm.The thickness of insulated lining is not limited to above range, but above-mentioned insulated lining is arranged
When within the above range, the thermal resistance of lining is smaller, this is conducive to the heat exchange efficiency for improving methanol gas and product gas.
In a preferred embodiment, the reaction system of above-mentioned methanol-to-olefins further includes that quenching unit and washing are single
Member, on the flow direction of olefin product gas, quenching unit and washing unit set gradually olefin product letter shoot road.It will
Methanol to olefins reaction device 10 forms heat exchange structure with gas-solid separating device 20 and is conducive to further decrease product gas into chilling
The temperature of unit reduces quenching unit and washes the load of unit.And cold wash unit and washing unit setting also help into
One step reduces the temperature of product gas, in order to the application of downstream process.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Methanol feedstock gas can absorb the heat of the olefin product system high temperature olefin product gas in gas-solid separating device,
Realize that olefin product gas exchanges heat with methanol to olefins reaction device, this can reduce the temperature of olefin product gas, to have
Conducive to the risk for reducing the heat exchanger coking in follow-up flow path, its heat transfer effect is improved；Simultaneously as material benzenemethanol utilizes alkene
The heat of product gas heats up, therefore avoids the reaction heat for absorbing methanol-to-olefins, and then improves methanol to olefins reaction
Selectivity.In addition, after heat exchange, raw material gas lift can be saved in methanol to olefins reaction device to the part energy of reaction temperature
Consumption reduces the generation of side reaction to be conducive to shorten the reaction time.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of reaction system of methanol-to-olefins, which is characterized in that including：
Methanol to olefins reaction device (10) is provided with olefin product outlet (121)；
Gas-solid separating device (20) is arranged in the inside of the methanol to olefins reaction device (10), and the olefin product goes out
Mouth (121) is connected with the arrival end of the gas-solid separating device (20)；
The methanol to olefins reaction device (10) and the gas-solid separating device (20) form heat exchange structure, with to from the gas
The olefin product gas separated in solid separation device (20) is cooled down.
2. reaction system according to claim 1, which is characterized in that the methanol to olefins reaction device (10) includes：
Methanol storage room (11) is provided with feed inlet (111)；
Reative cell (12), the reative cell (12) is provided with the olefin product outlet (121) and methanol inlet (122), described
Reative cell (12) is connected with the methanol storage room (11) by the methanol inlet (122), at least partly described gas-solid point
It is arranged in the inside of the methanol storage room (11) from device (20).
3. reaction system according to claim 2, which is characterized in that it is defeated to be provided with methanol in the methanol storage room (11)
Enter pipeline (101), the feed inlet (111) is connected with methanol intake line (101), the part methanol intake line
(101) outside of the coiling setting in the gas-solid separating device (20).
4. reaction system according to claim 2 or 3, which is characterized in that the gas-solid separating device (20) is whirlwind point
From device.
5. reaction system according to claim 4, which is characterized in that the gas-solid separating device (20) includes separation unit
(21) and coupled logical dipleg (22), the separation unit (21) are arranged in the methanol storage room (11), and described point
It is connected with olefin product outlet (121) from portion (21), at least partly described dipleg (22) is arranged in the reative cell
(12) in.
6. reaction system according to claim 5, which is characterized in that the dipleg (22) is bellows.
7. reaction system according to claim 5, which is characterized in that the gas-solid separating device (20) further includes dipleg set
It manages (23), the dipleg casing (23) is set in the outside of the dipleg (22).
8. reaction system according to claim 7, which is characterized in that be provided with wearing layer on the dipleg (22)；It is preferred that
Ground, the wearing layer are selected from concrete layer, ceramic layer or silicon carbide layer.
9. reaction system according to claim 4, which is characterized in that be arranged on the outer wall of the gas-solid separating device (20)
There is fin.
10. reaction system according to claim 3, which is characterized in that the methanol to olefins reaction device (10) is also wrapped
Partition board (30) is included, the partition board (30) is set to the inside of the methanol storage room (11), and in the methanol storage room (11)
Axis direction on, the partition board (30) setting is below the free end of the methanol intake line (101).
11. reaction system according to claim 10, which is characterized in that the partition board (30) be disposed below it is described
Insulated gas is filled between reative cell (12).
12. reaction system according to claim 11, which is characterized in that the insulated gas is selected from the mixed of methane and hydrogen
It closes one or more in gas, propane and ethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810102554.0A CN108404818B (en) | 2018-02-01 | 2018-02-01 | Methanol-to-olefin reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810102554.0A CN108404818B (en) | 2018-02-01 | 2018-02-01 | Methanol-to-olefin reaction system |
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| CN108404818A true CN108404818A (en) | 2018-08-17 |
| CN108404818B CN108404818B (en) | 2020-08-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030199720A1 (en) * | 2001-12-31 | 2003-10-23 | Lattner James R | Method for adding heat to a reactor system used to convert oxygenates to olefins |
| CN104478643A (en) * | 2014-12-12 | 2015-04-01 | 神华集团有限责任公司 | Device and method for preparing alkene from methanol and/or dimethyl ether |
| CN104474978A (en) * | 2014-12-12 | 2015-04-01 | 神华集团有限责任公司 | Device and method for preparing alkene from methanol and/or dimethyl ether |
| CN104549073A (en) * | 2015-01-05 | 2015-04-29 | 中国石油大学(华东) | Circulating fluidized bed reaction device for preparing olefins by using paraffin dehydrogenation |
-
2018
- 2018-02-01 CN CN201810102554.0A patent/CN108404818B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030199720A1 (en) * | 2001-12-31 | 2003-10-23 | Lattner James R | Method for adding heat to a reactor system used to convert oxygenates to olefins |
| CN104478643A (en) * | 2014-12-12 | 2015-04-01 | 神华集团有限责任公司 | Device and method for preparing alkene from methanol and/or dimethyl ether |
| CN104474978A (en) * | 2014-12-12 | 2015-04-01 | 神华集团有限责任公司 | Device and method for preparing alkene from methanol and/or dimethyl ether |
| CN104549073A (en) * | 2015-01-05 | 2015-04-29 | 中国石油大学(华东) | Circulating fluidized bed reaction device for preparing olefins by using paraffin dehydrogenation |
Non-Patent Citations (1)
| Title |
|---|
| 黄恩才: "《化学反应工程》", 30 June 1996, 化学工业出版社 * |
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