CN105949032A - Heating method of methanol synthesis system - Google Patents
Heating method of methanol synthesis system Download PDFInfo
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- CN105949032A CN105949032A CN201610306029.1A CN201610306029A CN105949032A CN 105949032 A CN105949032 A CN 105949032A CN 201610306029 A CN201610306029 A CN 201610306029A CN 105949032 A CN105949032 A CN 105949032A
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- methanol
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
- C07C29/152—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases characterised by the reactor used
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a heating method of a methanol synthesis system. The heating method comprises steps as follows: step S1, the methanol synthesis system is preheated with medium-pressure steam; step S2, when the temperature of a methanol synthesis steam drum in the methanol synthesis system is higher than 70 DEG C, boiler water is injected into the methanol synthesis system until reaching a normal liquid level; step S3, the medium-pressure steam is continuously injected into the methanol synthesis system, and the methanol synthesis system is heated. With the adoption of the method, contact between the boiler water at the lower temperature and the medium-pressure steam at the higher temperature is avoided, then the probability of a liquid shock phenomenon is reduced, and normal heating operation of a synthetic tower can be guaranteed.
Description
Technical field
The application relates to methanol-fueled CLC field, in particular to the temperature-rising method of a kind of system for methanol synthesis.
Background technology
System for methanol synthesis includes methyl alcohol synthetic reactor, methanol-fueled CLC drum and air shooter line, and methyl alcohol synthetic reactor and methanol
Synthesis drum is connected by pipeline.Methyl alcohol synthetic reactor is radial flow reactors, and process gas is entered by central distribution pipe, radially
By being seated in the beds of methyl alcohol synthetic reactor shell-side, there is methanol-fueled CLC reaction when 200～300 DEG C.In methyl alcohol synthetic reactor
Being distributed substantial amounts of heat exchanger tube, interior logical boiler water, boiler water absorbs the reaction heat that synthetic reaction produces, and forms byproduct steam, reaction
In tower, temperature is by the Steam pressure control managing interior rising.A byproduct steam part causes pre-heated synthesis gas at purification tank preheater, greatly
Part byproduct steam is output battery limit (BL) and enters steam pipe system.
Methyl alcohol synthetic reactor is room temperature at start-up reaction bed temperature, in order to meet the methanol-fueled CLC reaction demand to temperature,
Need to carry out warming temperature before methyl alcohol synthetic reactor is driven.This methyl alcohol synthetic reactor uses middle pressure steam to heat up, concrete liter
Temperature process is: first injected by boiler water in methanol-fueled CLC drum, after methanol-fueled CLC drum and heat exchanger tube all inject boiler water,
The ejector that goes into operation ejects middle pressure steam, and middle pressure steam enters in the tubulation of methanol-fueled CLC tower bottom, is re-introduced into methyl alcohol synthetic reactor
In heat exchanger tube.
Before methyl alcohol synthetic reactor is driven, relatively low with the temperature of synthetic catalyst bed in methanol-fueled CLC drum, it is room temperature, and pot
The temperature of stove water is 155 DEG C, when, after the tubulation that boiler water introduces methanol-fueled CLC drum and methyl alcohol synthetic reactor, its temperature can drop to
Within 100 DEG C, and boiler water all fills tubulation and the ejector injection zone that goes into operation bottom synthetic tower.And the temperature of middle pressure steam
More than 400 DEG C, after the ejector decompression that goes into operation, temperature is also maintained at more than 250 DEG C, and is saturated steam state.Higher temperature
Steam-like can produce liquid hit phenomenon after contacting with cold conditions boiler water bottom drum with synthetic tower in tubulation, causes synthetic tower framework to shake
Dynamic, pipe vibration, can cause synthetic tower cannot be normally carried out warming temperature time serious.
Summary of the invention
The application aims to provide the temperature-rising method of a kind of system for methanol synthesis, to alleviate in system for methanol synthesis of the prior art
Liquid hammer problem.
To achieve these goals, according to an aspect of the application, it is provided that the temperature-rising method of a kind of system for methanol synthesis, should
Method includes: step S1, uses middle pressure steam to preheat system for methanol synthesis；Step S2, when above-mentioned system for methanol synthesis
In methanol-fueled CLC drum temperature more than 70 DEG C time, in above-mentioned methanol-fueled CLC drum inject boiler water to normal level；And step
Rapid S3, continues to inject above-mentioned middle pressure steam to above-mentioned system for methanol synthesis, heats up above-mentioned system for methanol synthesis.
Further, above-mentioned steps S1 includes: step S11, above-mentioned middle pressure steam injects the bottom of methyl alcohol synthetic reactor, to upper
The bottom stating methyl alcohol synthetic reactor preheats；And step S12, above-mentioned middle pressure steam is injected in above-mentioned methanol-fueled CLC drum, right
Above-mentioned methanol-fueled CLC drum preheats.
Further, above-mentioned steps S11 includes: step S111, above-mentioned middle pressure steam is injected steam pipe line, to above-mentioned steam
Pipeline preheats；And step S112, above-mentioned middle pressure steam injects the bottom of above-mentioned methyl alcohol synthetic reactor, to above-mentioned methanol-fueled CLC
The bottom of tower preheats.
Further, above-mentioned steps S12 includes: step S121, above-mentioned middle pressure steam is injected heat exchange pipeline, to above-mentioned heat exchange
Pipeline preheats；And step S122, above-mentioned middle pressure steam is injected in above-mentioned methanol-fueled CLC drum, to above-mentioned methanol-fueled CLC drum
Preheat.
Further, above-mentioned steps S122 includes: open the venting valve of above-mentioned methanol-fueled CLC drum；And open middle pressure steam
Control valve, above-mentioned middle pressure steam is injected in above-mentioned methanol-fueled CLC drum.
Further, during above-mentioned middle pressure steam is injected above-mentioned methanol-fueled CLC drum, above-mentioned middle pressure steam control valve is maintained
The pressure reduction at door two ends is between 0.04～0.2MPa.
Further, also include before above-mentioned steps S1: step S0, the liquid in above-mentioned system for methanol synthesis is drained.
Further, above-mentioned steps S0 also includes: the liquid in above-mentioned methanol-fueled CLC drum is drained；And by steam pipe line
Draining with the liquid in heat exchange pipeline, above-mentioned steam pipe line is connected with the bottom of methyl alcohol synthetic reactor, and above-mentioned heat exchange pipeline is with above-mentioned
Methanol-fueled CLC drum is connected.
Further, the pressure of above-mentioned middle pressure steam is between 3.5～4.5MPa.
Further, the temperature of above-mentioned middle pressure steam is between 370～425 DEG C.
Temperature-rising method in application the application, it is to avoid of the prior art directly inject colder boiler in system for methanol synthesis
Water, but first system for methanol synthesis is preheated, when the temperature in methanol-fueled CLC drum is more than 70 DEG C, to methanol-fueled CLC system
System injects boiler water, owing to the temperature in system for methanol synthesis is higher so that boiler water temperature raises, liquid be heated to steaming
Steam state, it is to avoid the middle pressure steam that the relatively low boiler water of temperature is with temperature higher contacts, so reduce that liquid hit phenomenon occurs general
Rate, it is ensured that synthetic tower can carry out normal warming temperature.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing further understanding of the present application, and the application's is schematic real
Execute example and illustrate for explaining the application, being not intended that the improper restriction to the application.In the accompanying drawings:
Fig. 1 shows the schematic flow sheet of the temperature-rising method of the system for methanol synthesis that a kind of exemplary embodiment of the application proposes；With
And
Fig. 2 shows the structural representation of the system for methanol synthesis that a kind of preferred embodiment provides.
Detailed description of the invention
It it is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless otherwise finger
Bright, all technology used herein and scientific terminology have and are generally understood that with the application person of an ordinary skill in the technical field
Identical meanings.
It should be noted that term used herein above merely to describe detailed description of the invention, and be not intended to restricted root according to this Shen
Illustrative embodiments please.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to
Including plural form, additionally, it should be understood that, when using term " to comprise " in this manual and/or time " including ",
It indicates existing characteristics, step, operation, device, assembly and/or combinations thereof.
As background technology is introduced, the temperature-rising method of system for methanol synthesis of the prior art easily produces the phenomenon of liquid hammer, for
Solve technical problem as above, present applicant proposes the temperature-rising method of a kind of system for methanol synthesis.
In a kind of typical embodiment of the application, it is provided that the temperature-rising method of a kind of system for methanol synthesis, as it is shown in figure 1, the party
Method includes: step S1, uses middle pressure steam to preheat system for methanol synthesis；Step S2, when the first in system for methanol synthesis
When alcohol synthesis drum temperature is more than 70 DEG C, in methanol-fueled CLC drum, inject boiler water to normal level；And step S3, upwards
State system for methanol synthesis and inject above-mentioned middle pressure steam, above-mentioned system for methanol synthesis is heated up.
In above-mentioned temperature-rising method, it is possible to ensure that the temperature of system for methanol synthesis rises to 200 DEG C, it is to avoid of the prior art directly
In system for methanol synthesis, inject colder boiler water, but first system for methanol synthesis is preheated, when in methanol-fueled CLC drum
Temperature more than 70 DEG C time, in system for methanol synthesis inject boiler water, owing to the temperature in system for methanol synthesis is higher so that
Boiler water temperature raises, liquid be heated to steam-like, it is to avoid the middle pressure steam that the relatively low boiler water of temperature is with temperature higher connects
Touch, and then reduce the probability that liquid hit phenomenon occurs, it is ensured that synthetic tower can carry out normal warming temperature.
In a kind of embodiment in the application, above-mentioned steps S1 includes: step S11, and above-mentioned middle pressure steam is injected above-mentioned methanol
The bottom of synthetic tower, preheats the bottom of methyl alcohol synthetic reactor；Step S12, injects above-mentioned methanol-fueled CLC by above-mentioned middle pressure steam
In drum, methanol-fueled CLC drum is preheated.So by the way of progressively preheating, it is possible to be further ensured that and avoid liquid hammer existing
The generation of elephant.
In order to further ensure that methanol synthesizer does not occur liquid hit phenomenon, in preferred steps S11, first above-mentioned middle pressure steam is noted
Enter steam pipe line, above-mentioned steam pipe line preheated, then, above-mentioned middle pressure steam is injected the bottom of above-mentioned methyl alcohol synthetic reactor,
Above-mentioned bottom is preheated.
In the application another kind embodiment, above-mentioned steps S12 includes: step S121, and above-mentioned middle pressure steam is injected heat exchange pipeline,
Above-mentioned heat exchange pipeline is preheated；Step S122, injects above-mentioned middle pressure steam in above-mentioned methanol-fueled CLC drum, closes above-mentioned methanol
Drum is become to preheat.So by the way of progressively preheating, further avoid heat exchange pipeline and the liquid in methanol-fueled CLC drum
Hit the generation of phenomenon.
In another embodiment of the application, in the above-mentioned step injected by middle pressure steam in above-mentioned methanol-fueled CLC drum, open above-mentioned first
The venting valve of alcohol synthesis drum, i.e. opens methanol-fueled CLC drum quantity of steam valve, maintains methanol-fueled CLC drum steam evacuation valve to have
A small amount of steam evacuation；Open middle pressure steam and control valve, middle pressure steam is injected in above-mentioned methanol-fueled CLC drum, steamed by middle pressure
Vapour controls valve and adjusts the addition of middle pressure steam.
The generation without liquid hit phenomenon of the methanol-fueled CLC drum is introduced in order to better control over middle pressure steam, according to the requirement of the nozzle that goes into operation, this
During above-mentioned middle pressure steam is preferably injected above-mentioned methanol-fueled CLC drum by application, above-mentioned middle pressure steam is maintained to control valve two ends
Pressure reduction between 0.04～0.2MPa.
In a kind of preferred embodiment of the application, also include before above-mentioned steps S1: step S0, by system for methanol synthesis
Liquid drains.So before system for methanol synthesis is preheated, first the liquid of its internal residual is drained, it is to avoid the liquid of residual
Contact, with the medium of preheating, the liquid hit phenomenon occurred, reduce the probability that liquid hit phenomenon occurs further.
In order to avoid the generation of liquid hit phenomenon in methanol-fueled CLC drum further, step S0 includes: by the liquid in methanol-fueled CLC drum
Body drains, and the liquid in the steam pipe line being connected with the bottom of methyl alcohol synthetic reactor drains, will be with above-mentioned methanol-fueled CLC drum
Liquid in the heat exchange pipeline being connected drains.
In order to methyl alcohol synthetic reactor is more efficiently warming up to predetermined temperature, the pressure of the preferred middle pressure steam of the application exists
Between 3.5～4.5MPa.
Further preferably, the temperature of above-mentioned middle pressure steam is between 370～425 DEG C.
So that those skilled in the art can clearly understand the technical scheme of the application, below with reference to concrete enforcement
The scheme of the application is described in detail by example with accompanying drawing.
As a example by the system for methanol synthesis shown in Fig. 2, this synthesis system includes methyl alcohol synthetic reactor 1, closes to homogeneous solution-type reactor 2, methanol
Become drum 3, middle pressure steam storage tank 4, steam pipe line 5 and boiler water feed-line 7.Wherein, methyl alcohol synthetic reactor 1 includes
Heat exchange pipeline 6, and this heat exchange pipeline 6 extends to methanol-fueled CLC drum 3 through the outlet of methyl alcohol synthetic reactor 1, and middle pressure steam stores
Tank 4 is connected with methyl alcohol synthetic reactor 1 by steam pipe line 5, has the first pipe between methanol-fueled CLC drum 3 and steam pipe line 5
Line 8, is connected with methanol-fueled CLC drum 3 by boiler water feed-line 7 to homogeneous solution-type reactor 2.
The temperature of the middle pressure steam in this example is between 370～425 DEG C, and pressure is between 3.5～4.5MPa.
Concrete temperature-rise period is:
Step S0, open methyl alcohol synthetic reactor bottom blow-down showering guilding valve by methanol-fueled CLC drum 3, steam pipe line the 5, first pipeline 8 with
Liquid in heat exchange pipeline 6 all drains.
Step S1, injects middle pressure steam in above-mentioned system for methanol synthesis, preheats above-mentioned system for methanol synthesis.
First, above-mentioned middle pressure steam is injected the bottom of above-mentioned methyl alcohol synthetic reactor 1, the bottom of methyl alcohol synthetic reactor 1 is preheated.
After confirming that methanol-fueled CLC drum 3, steam pipe line 5 are discharged with no liquid in heat exchange pipeline 6, close methyl alcohol synthetic reactor 1 end
The blowdown showering guilding valve in portion, confirms that the steam pipe line 5 blind plate at battery limit (BL) is conducting state, slightly opens steam pipe line 5 at battery limit (BL)
Stop valve, opens the showering guilding valve heating coil of pipeline before bottom methyl alcohol synthetic reactor 1 tubulation, and heating coil cuts out showering guilding valve after terminating, and standard-sized sheet steams
The steam pipe line 5 stop valve at battery limit (BL).Draw middle pressure steam by Valve controlling and carry out heating coil, heating coil to methyl alcohol synthetic reactor 1
Showering guilding valve is closed after end.
Secondly, above-mentioned middle pressure steam is injected in above-mentioned methanol-fueled CLC drum 3.
Slightly drive methyl alcohol synthetic reactor 1 into restrain by-pass valve (this valve be positioned at bottom methyl alcohol synthetic reactor 1 before tubulation) and draw middle pressure steam
Enter methyl alcohol synthetic reactor 1.After the heat exchange pipeline 6 of middle pressure steam introducing methyl alcohol synthetic reactor 1 is without exception, open methanol-fueled CLC drum 3
Venting valve, maintain methanol-fueled CLC drum 3 steam evacuation valve have a small amount of steam evacuation.Open middle pressure steam and control valve, and
And control valve control the addition of middle pressure steam by adjusting middle pressure steam, pressure difference after maintaining middle pressure steam control valve in front of the door
Between 0.04-0.2MPa (G).
Step S2, when the temperature in above-mentioned methanol-fueled CLC drum 3 is more than 70 DEG C, injects boiler water in methanol-fueled CLC drum 3
To normal level.
When methanol-fueled CLC drum 3 indicates more than 70 DEG C, boiler water can be injected to methanol-fueled CLC drum 3, set up normal level,
During methanol-fueled CLC drum 3 sets up liquid level, according to the heating rate of methanol synthesis catalyst, methyl alcohol synthetic reactor 1 progressively can be entered
Row warming temperature.
Use above-mentioned temperature-rising method, it is possible to avoid the generation of liquid hit phenomenon in methanol synthesizer, it is ensured that system for methanol synthesis
Being normally carried out of intensification work, further ensures the normal work of system for methanol synthesis.
As can be seen from the above description, the application the above embodiments achieve following technique effect:
Temperature-rising method in the application, it is to avoid of the prior art directly inject colder boiler water in system for methanol synthesis, and
It is first system for methanol synthesis to be preheated, when the temperature in methanol-fueled CLC drum is more than 70 DEG C, notes in system for methanol synthesis
Enter boiler water, owing to the temperature in system for methanol synthesis is higher so that boiler water temperature raises, liquid be heated to steam-like,
The middle pressure steam avoiding the relatively low boiler water of temperature higher with temperature contacts, and then reduces the probability that liquid hit phenomenon occurs, and protects
Demonstrate,prove synthetic tower and can carry out normal warming temperature.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for those skilled in the art
For, the application can have various modifications and variations.All within spirit herein and principle, any amendment of being made, etc.
With replacement, improvement etc., within should be included in the protection domain of the application.
Claims (10)
1. the temperature-rising method of a system for methanol synthesis, it is characterised in that described temperature-rising method includes:
Step S1, uses middle pressure steam to preheat system for methanol synthesis；
Step S2, when the methanol-fueled CLC drum temperature in described system for methanol synthesis is more than 70 DEG C, to described methanol-fueled CLC
Drum injects boiler water to normal level；And
Step S3, continues to inject medium pressure steam to described system for methanol synthesis, rises described system for methanol synthesis
Temperature.
Temperature-rising method the most according to claim 1, it is characterised in that described step S1 includes:
Step S11, injects medium pressure steam the bottom of methyl alcohol synthetic reactor, carries out pre-to the bottom of described methyl alcohol synthetic reactor
Heat；And
Step S12, injects medium pressure steam in described methanol-fueled CLC drum, preheats described methanol-fueled CLC drum.
Temperature-rising method the most according to claim 2, it is characterised in that described step S11 includes:
Step S111, injects steam pipe line by medium pressure steam, preheats described steam pipe line；And
Step S112, medium pressure steam injects the bottom of described methyl alcohol synthetic reactor, enters the bottom of described methyl alcohol synthetic reactor
Row preheating.
Temperature-rising method the most according to claim 2, it is characterised in that described step S12 includes:
Step S121, injects heat exchange pipeline by medium pressure steam, preheats described heat exchange pipeline；And
Step S122, injects medium pressure steam in described methanol-fueled CLC drum, carries out pre-to described methanol-fueled CLC drum
Heat.
Temperature-rising method the most according to claim 4, it is characterised in that described step S122 includes:
Open the venting valve of described methanol-fueled CLC drum；And
Open middle pressure steam and control valve, medium pressure steam is injected in described methanol-fueled CLC drum.
Temperature-rising method the most according to claim 5, it is characterised in that medium pressure steam is injected described methanol-fueled CLC drum
During, maintain the pressure reduction at medium pressure steam control valve two ends between 0.04～0.2MPa.
Temperature-rising method the most according to claim 1, it is characterised in that also include before described step S1:
Step S0, drains the liquid in described system for methanol synthesis.
Temperature-rising method the most according to claim 7, it is characterised in that also include in described step S0:
Liquid in described methanol-fueled CLC drum is drained；And
Being drained with the liquid in heat exchange pipeline by steam pipe line, described steam pipe line is connected with the bottom of methyl alcohol synthetic reactor,
Described heat exchange pipeline is connected with described methanol-fueled CLC drum.
9. according to the temperature-rising method described in claim 1 or 8, it is characterised in that the pressure of medium pressure steam is 3.5～4.5MPa
Between.
Temperature-rising method the most according to claim 9, it is characterised in that the temperature of medium pressure steam is between 370～425 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610306029.1A CN105949032B (en) | 2016-05-10 | 2016-05-10 | The temperature-rising method of system for methanol synthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610306029.1A CN105949032B (en) | 2016-05-10 | 2016-05-10 | The temperature-rising method of system for methanol synthesis |
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| Publication Number | Publication Date |
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| CN105949032A true CN105949032A (en) | 2016-09-21 |
| CN105949032B CN105949032B (en) | 2018-11-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277722A2 (en) * | 2001-07-19 | 2003-01-22 | Mitsubishi Heavy Industries, Ltd. | Method of manufacturing methanol |
| CN103570494A (en) * | 2013-11-21 | 2014-02-12 | 七台河宝泰隆甲醇有限公司 | Method for starting methanol synthesis tower through reverse steam guiding |
-
2016
- 2016-05-10 CN CN201610306029.1A patent/CN105949032B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277722A2 (en) * | 2001-07-19 | 2003-01-22 | Mitsubishi Heavy Industries, Ltd. | Method of manufacturing methanol |
| CN103570494A (en) * | 2013-11-21 | 2014-02-12 | 七台河宝泰隆甲醇有限公司 | Method for starting methanol synthesis tower through reverse steam guiding |
Non-Patent Citations (1)
| Title |
|---|
| 杨世新等: "DAVY甲醇合成系统工艺开车总结", 《网络通信》 * |
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Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: Guoneng Baotou Coal Chemical Co.,Ltd. Patentee after: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: SHENHUA BAOTOU COAL CHEMICAL Co.,Ltd. Patentee before: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. |