CN103908917A - Method for eliminating burning generation in mixer - Google Patents
Method for eliminating burning generation in mixer Download PDFInfo
- Publication number
- CN103908917A CN103908917A CN201310003282.6A CN201310003282A CN103908917A CN 103908917 A CN103908917 A CN 103908917A CN 201310003282 A CN201310003282 A CN 201310003282A CN 103908917 A CN103908917 A CN 103908917A
- Authority
- CN
- China
- Prior art keywords
- burning
- blender
- oxidizing gas
- gas
- elimination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a method for eliminating burning generation in a mixer, wherein problems of raw material consumption and damage on equipment due to burning in the mixer in the prior art are mainly solved. According to the present invention, the technical scheme comprises that: the required amount of an oxidizing gas and a substance capable of being subjected to burning or a strong heat emission reaction with the oxidizing gas under a system working condition are introduced into a mixer to mix, a temperature detection element is at least arranged on the pipeline from the outlet of the mixer to the position 50 m far away from the outlet of the mixer, the temperature signal of the temperature detection element is calculated to obtain the temperature change rate, the interlock program of the device is started when the temperature change rate is more than or equal to 5 DEG C/s, and the oxidizing gas entering is stopped, or an inert material gas incapable of being subjected to burning or a reaction with the oxidizing gas under a system working condition is input. According to the present invention, the problems in the prior art are well solved, and the method can be used for the process production requiring elimination of the burning or the strong heat emission reaction in the mixer.
Description
Technical field
The present invention relates to a kind of method that burning occurs in blender of eliminating.
Background technology
Gas phase oxidation is one of common chemical industry, petrochemical.Blender is the visual plant of gas phase oxidation process, as document CN2674304 discloses a kind of high-temperature low-oxygen air flue gas blender.For guaranteeing course of reaction safety, oxygen concentration must be controlled in the safe range that can not blast.Guaranteed that although can take measures in technique its final oxygen concentration is in safe range, but in mixed process, oxygen or air inevitably have reactant mixture that a diffusion mixing process makes local space in blast flammable range after entering, and under the factor such as static, high temperature triggers, internal-combustion occur.Although because total concentration is controlled, can there is not major accident, if local burning can not be suppressed fast, extinguish in time, gently cause consumption of raw materials, the heavy accident such as may cause that equipment burns out.And along with the increase of unit scale and equipment size, the danger of accident is also increasing.
From current data, as the situation that internal mixer is not occurred to burn in the gas phase oxidation flow process control of ethylene process vinyl acetate technique is carried out special monitoring and control.And in fact, evidence suggests that this kind of internal-combustion occurred really, and occur time not in time find.
Summary of the invention
Technical problem to be solved by this invention is while existing internal mixer that the improper deep oxidation reaction of burning or similar burning occurs for prior art, can not be monitored in time and be started corresponding control system and be prevented burning, thereby cause the consumption of raw materials that internal-combustion causes, the problem of device damage, a kind of method that burning occurs in new elimination blender is provided.The method can be monitored and be eliminated in time the improper deep oxidation that internal mixer occurs, and maintains and produces normal operation.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of method that burning occurs in blender of eliminating, can pass in blender and mix with the material of oxidizing gas generation burning or strong exothermic reaction by the oxidizing gas of aequum with under system condition condition; At least, on the pipeline at 50 meters, exit to the mixer outlet place of blender, set temperature detecting element, obtains rate temperature change by the temperature signal of temperature detection device through computing; In the time that rate temperature change is more than or equal to 5 ℃/sec, the interlock program of starting drive, stops entering of oxidizing gas; Or in oxidizing gas input, input and the inert substance gas that can not burning occur or react with oxidizing gas under system condition condition; Described inert substance gas and oxidizing gas enter blender by same pipeline, and the pressure of the inert substance gas inlet pressure that is more than or equal to oxidizing gas and enters blender.
In technique scheme, described oxidizing gas comprises at least one containing in the gas of oxygen, chlorine or fluorine, and wherein said oxygen-containing gas is selected from oxygen or air.The described material that can burning or strong exothermic reaction occur with oxidizing gas under system condition condition is selected from least one in alcohol, the aldehyde of C1 ~ C18 or the ketone of C1 ~ C18 of alkynes, C1 ~ C18 of alkene, the C2 ~ C18 of alkane, the C2 ~ C18 of C1 ~ C18.Described inert substance gas is selected from nitrogen, helium or CO
2in at least one.Described temperature detection device preferred version is to be arranged on the pipeline at 10 meters, exit to mixer outlet place of blender.When rate temperature change preferable range is when being more than or equal to 10 ℃/sec, the interlock program of starting drive.The pressure preferable range of inert substance gas is the inlet pressure 0.1MPa that is more than or equal to oxidizing gas and enters blender, and more preferably scope is the inlet pressure 0.2MPa that is more than or equal to oxidizing gas and enters blender.
In the inventive method, oxidizing gas and the ratio that can the material of burning or strong exothermic reaction occur with oxidizing gas under system condition condition meet following condition: both ratios are outside the explosive combustion limit, and both ratios meet technological requirement aequum.
When normal production, the variation of fluid temperature (F.T.) is conventionally comparatively slow, and while adopting monitor temperature rate of change can exempt normal production, the interference of variations in temperature, prevents misoperation.The inventive method settles temperature-measuring element to detect mixer outlet gas temperature on the pipeline at 50 meters, exit to the mixer outlet place of blender, provides control signal according to rate temperature change.On inert gas pipeline, be provided with autocontrol valve.In the time that rate temperature change is more than or equal to 5 ℃/sec, the interlock program of starting drive, stops entering of oxidizing gas; Or in oxidizing gas input, input and the inert substance gas that burning or strong exothermic reaction can not occur with process gas under system condition condition; Internal mixer oxidizing gas concentration is reduced to rapidly below the explosive combustion limit, fray-out of flame.Adopt the inventive method, can internal mixer duty be carried out monitoring in real time and automatically be processed, eliminate in time the improper deep oxidation that internal mixer occurs, eliminate potential safety hazard, avoid wastage of material and device damage, maintain the normal operation of production, obtained good technique effect.
Below by embodiment, the present invention is further elaborated.
The specific embodiment
[embodiment 1]
Adopt methyl alcohol overflow method to produce formaldehyde, the air that is 1.5 by mol ratio and methyl alcohol carry out entering reactor after premixed in premixer again.On the pipeline in 10 meters, exit to the premixer exit of premixer, set temperature detecting element, records fluid temperature variations speed by the temperature signal of temperature detection device through computing.In the time that rate temperature change is more than or equal to 5 ℃/sec, the interlock program of starting drive, stops entering of air.
[embodiment 2]
Carry out acylation with ethene, acetic acid and produce vinyl acetate, by mixing with oxygen containing the circulating air of ethene 45% (mol), then enter reactor in blender.On the pipeline at 15 meters, exit to the mixer outlet place of blender, set temperature detecting element, records fluid temperature variations speed by the temperature signal of temperature detection device through computing.In the time monitoring rate temperature change and be more than or equal to 10 ℃/sec, show inner burning, the interlock program of starting drive, opens nitrogen transfer valve, inputs rapidly nitrogen with dilution oxygen on oxygen channel simultaneously, extinguishes internal-combustion.At least 0.1MPa of pressure when the pressure of nitrogen enters blender higher than oxygen.
[embodiment 3]
Ethylene epoxy ethane, is that the ethylene recycle gas of 25% (volume) and oxygen pass in blender and mixes by ethylene contents, and the mol ratio of circulating air and oxygen is 15.On the pipeline at 25 meters, exit to the mixer outlet place of blender, set temperature detecting element, records fluid temperature variations speed by the temperature signal of temperature detection device through computing.In the time that rate temperature change is more than or equal to 10 ℃/sec, the interlock program of starting drive, stops oxygen input, inputs nitrogen simultaneously.Nitrogen and oxygen enter blender by same pipeline, and the pressure of nitrogen is higher than oxygen pressure 0.25MPa.
Claims (9)
1. eliminate the method that burning occurs in blender, can pass in blender and mix with the material of oxidizing gas generation burning or strong exothermic reaction by the oxidizing gas of aequum with under system condition condition; At least, on the pipeline at 50 meters, exit to the mixer outlet place of blender, set temperature detecting element, obtains rate temperature change by the temperature signal of temperature detection device through computing; In the time that rate temperature change is more than or equal to 5 ℃/sec, the interlock program of starting drive, stops entering of oxidizing gas; Or in oxidizing gas input, input and the inert substance gas that can not burning occur or react with oxidizing gas under system condition condition; Described inert substance gas and oxidizing gas enter blender by same pipeline, and the pressure of the inert substance gas inlet pressure that is more than or equal to oxidizing gas and enters blender.
2. in elimination blender according to claim 1, there is the method for burning, it is characterized in that described oxidizing gas comprises at least one containing in the gas of oxygen, chlorine or fluorine.
3. the method that burning occurs in elimination blender according to claim 2, is characterized in that described oxygen-containing gas is selected from oxygen or air.
4. there is the method for burning in elimination blender according to claim 1, it is characterized in that the described material that can burning or strong exothermic reaction occur with oxidizing gas under system condition condition is selected from least one in alcohol, the aldehyde of C1 ~ C18 or the ketone of C1 ~ C18 of the alkynes of the alkene of the alkane of C1 ~ C18, C2 ~ C18, C2 ~ C18, C1 ~ C18.
5. the method that burning occurs in elimination blender according to claim 1, is characterized in that described inert substance gas is selected from nitrogen, helium or CO
2in at least one.
6. there is the method for burning in elimination blender according to claim 1, it is characterized in that described temperature detection device is arranged on the pipeline at 10 meters, exit to mixer outlet place of blender.
7. the method that burning occurs in elimination blender according to claim 1, is characterized in that in the time that rate temperature change is more than or equal to 10 ℃/sec the interlock program of starting drive.
8. the method for burning occurs in elimination blender according to claim 1, and the pressure that it is characterized in that inert substance gas is more than or equal to oxidizing gas and enters the inlet pressure 0.1MPa of blender.
9. the method for burning occurs in elimination blender according to claim 8, and the pressure that it is characterized in that inert substance gas is more than or equal to oxidizing gas and enters the inlet pressure 0.2MPa of blender.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310003282.6A CN103908917B (en) | 2013-01-06 | 2013-01-06 | Eliminate the method that burning occurs in blender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310003282.6A CN103908917B (en) | 2013-01-06 | 2013-01-06 | Eliminate the method that burning occurs in blender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103908917A true CN103908917A (en) | 2014-07-09 |
| CN103908917B CN103908917B (en) | 2017-03-08 |
Family
ID=51035102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310003282.6A Active CN103908917B (en) | 2013-01-06 | 2013-01-06 | Eliminate the method that burning occurs in blender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103908917B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252163A (en) * | 2019-07-03 | 2019-09-20 | 青海盐湖工业股份有限公司 | A kind of mixer protection system and method for vinyl chloride production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1539802A (en) * | 2003-03-14 | 2004-10-27 | ��ʽ�����ձ���ý | Method of controlling operation of gas-phase reactor |
| CN1668553A (en) * | 2002-07-17 | 2005-09-14 | 巴斯福股份公司 | Safe operation of a continuous heterogeneously catalyzed gas-phase partial oxidation of at least one organic compound |
| CN1781594A (en) * | 2004-11-22 | 2006-06-07 | 罗门哈斯公司 | Non-routine reactor shutdown method |
| CN101312935A (en) * | 2005-11-23 | 2008-11-26 | 巴斯夫欧洲公司 | Method for safely carrying out gas phase partial oxidation |
-
2013
- 2013-01-06 CN CN201310003282.6A patent/CN103908917B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668553A (en) * | 2002-07-17 | 2005-09-14 | 巴斯福股份公司 | Safe operation of a continuous heterogeneously catalyzed gas-phase partial oxidation of at least one organic compound |
| CN1539802A (en) * | 2003-03-14 | 2004-10-27 | ��ʽ�����ձ���ý | Method of controlling operation of gas-phase reactor |
| CN1781594A (en) * | 2004-11-22 | 2006-06-07 | 罗门哈斯公司 | Non-routine reactor shutdown method |
| CN101312935A (en) * | 2005-11-23 | 2008-11-26 | 巴斯夫欧洲公司 | Method for safely carrying out gas phase partial oxidation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252163A (en) * | 2019-07-03 | 2019-09-20 | 青海盐湖工业股份有限公司 | A kind of mixer protection system and method for vinyl chloride production |
| CN110252163B (en) * | 2019-07-03 | 2021-09-17 | 青海盐湖工业股份有限公司 | Mixer protection system and method for vinyl chloride production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103908917B (en) | 2017-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1525172B1 (en) | Method for reliably operating a continuous heterogeneously catalyzed gas phase partial oxidation of at least one organic compound | |
| TWI747852B (en) | Device for carrying out a chemical reaction by a continuous method | |
| CN102471187B (en) | For the method and apparatus of the dehydrating alkanes of product composition stabilization | |
| CN111936454A (en) | ODH complex with in-line mixer unit and feed line purge | |
| CN1926101B (en) | Method for producing cumene hydroperoxide | |
| CN103908917A (en) | Method for eliminating burning generation in mixer | |
| Pio et al. | Low temperature combustion of methane/alkenes mixtures | |
| DE102011000480A1 (en) | Systems and methods for operating a catalytic reforming assembly for use with a gas turbine system | |
| CN203217389U (en) | Control system of reactor for preparing acrylic acid with propane through one-step method | |
| US10895380B2 (en) | Flameless thermal oxidizer for oxidizing gaseous effluent streams containing hydrogen gas | |
| CN110412216B (en) | VOCs concentration online measurement method | |
| Chen | An inherently safer process of cyclohexane oxidation using pure oxygen—an example of how better process safety leads to better productivity | |
| CN104297435B (en) | The industrial production on-line detecting system of a kind of synthetic gas preparing ethylene glycol | |
| TWI415674B (en) | Chemical process optimization method that considers chemical process plant safety | |
| CN104672177A (en) | Hexafluropropylene oxide continuous production technique | |
| Liu et al. | Investigating the inherent safety designs of typical exothermic reaction processes | |
| Lorences et al. | VPO transient lattice oxygen contribution | |
| Jecha et al. | Modernization of unit for elimination of VOCs by catalytic oxidation | |
| CN108675908A (en) | A kind of explosive microchannel continuous reaction system | |
| Zhang et al. | Thermal hazard and reaction mechanism for the preparation of epoxidized soybean oil from hydrogen peroxide | |
| CN208436797U (en) | For controlling the device of the content of specific gas in target container | |
| TWI652109B (en) | Method for producing reaction generated gas and fluid layer gas phase reaction device | |
| KR101771349B1 (en) | Large display panel and method for displaying operation status of nuclear power plant | |
| CN101584969A (en) | Mixer for preparing acrylic acid through propylene two-step oxygenation method | |
| CN109206345A (en) | A kind of processing technology of dimethyl sulfoxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |