CN116594433A - Explosion-proof control method for acrylic acid production process by using propane oxidation - Google Patents
Explosion-proof control method for acrylic acid production process by using propane oxidation Download PDFInfo
- Publication number
- CN116594433A CN116594433A CN202310485884.3A CN202310485884A CN116594433A CN 116594433 A CN116594433 A CN 116594433A CN 202310485884 A CN202310485884 A CN 202310485884A CN 116594433 A CN116594433 A CN 116594433A
- Authority
- CN
- China
- Prior art keywords
- explosion
- acrylic acid
- propane
- control method
- flow rate
- 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.)
- Pending
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000001294 propane Substances 0.000 title claims abstract description 30
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 title claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 17
- 230000003647 oxidation Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000004880 explosion Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000012824 chemical production Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/215—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of saturated hydrocarbyl groups
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses an explosion-proof control method for a process for producing acrylic acid by using propane oxidation, and relates to the technical field of chemical production. According to the invention, by analyzing the material flow, the explosion curve of the acrylic acid production process is obtained, and the explosion curve changes along with the change of the reaction system. The invention combines the distance between the working point and the explosion curve to make safe pre-judgment, thereby guiding safe explosion-proof operation.
Description
Technical Field
The invention belongs to the technical field of chemical production, and particularly relates to an explosion-proof control method for a process for producing acrylic acid by using propane oxidation.
Background
Currently, the main method for producing acrylic acid worldwide is a direct gas-phase oxidation method of propylene, and the technology is already mature and perfect. Recently, the technology of producing acrylic acid by oxidizing propane has been broken through, and industrialization is gradually completed. The chemical reaction equation for the oxidation of propane to acrylic acid is:
CH 3 CH 2 CH 3 + 2O 2 → CH 2 =CHCOOH + 2H 2 O
in the production device, the raw material gas is mixed gas of propane, air and inert gas (consisting of water vapor and circulating gas) according to a certain proportion. The mixed gas passes through a fixed bed reactor, and is rapidly subjected to gas-solid phase heterogeneous catalytic oxidation reaction at a certain temperature to generate acrylic acid. If the mixture ratio of the mixed gas is controlled improperly, the mixed gas can enter an explosion area, and the device can be exploded, so that the control of the mixed gas in a safe area is the key of the technology for producing the acrylic acid by oxidizing propane.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an explosion-proof control method for producing acrylic acid by using propane oxidation, which comprises the following specific operations:
an explosion-proof control method for producing acrylic acid by using propane oxidation comprises the following steps:
step S1, by monitoring the flow rate of each material in the production device, an explosion curve matched with a specific operation condition is calculated, as shown in FIG. 1:
the invention obtains the explosion range curves of propane, air and water vapor and the explosion curves of propane, air and nitrogen through experiments, and obtains the explosion curves shown in the figure 1 of the invention.
The calculation formula of the coordinates of any point on the explosion range curve of propane, air, nitrogen and water vapor in fig. 1 is as follows:
a. b is a formula correction coefficient;
s2, combining the explosion curves, and pre-judging the operation safety of the device according to the distance between the working point and the explosion curves;
s3, combining with the pre-judgment to perform corresponding explosion-proof operation.
Preferably, the production device is controlled by adopting an interlocking control valve and is provided with an explosion-proof alarm device.
Preferably, the stream flow in step S1 includes propane gas flow, air flow, nitrogen flow, water vapor flow, and tail gas flow.
The explosion-proof control method for producing acrylic acid by using propane oxidation is characterized in that when the working condition point is close to the calculated explosion curve, an alarm device is triggered to remind an operator to adjust the device.
When the working point reaches the explosion interlocking curve, the device cuts off the propane in an interlocking way and carries out safe replacement on the acrylic acid reactor.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, by analyzing the material flow rate, the explosion curve in the acrylic acid production process is obtained, and the explosion curve changes along with the change of the reaction system. The invention combines the distance between the working point and the explosion curve to make safe pre-judgment, thereby guiding safe explosion-proof operation.
Drawings
FIG. 1 is an explosion curve for one operating regime of the present invention.
Detailed Description
The following detailed description of the present invention provides for a more complete understanding of the objects, features and advantages of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
An explosion-proof control method for producing acrylic acid by using propane oxidation comprises the following specific steps:
step S1, calculating an explosion curve matched with a specific operation condition through monitoring the flow of each material in the production device; namely, the explosion range curves of propane, air and water vapor and the explosion curves of propane, air and nitrogen are obtained through experiments, and the explosion curves shown in figure 1 are obtained
The calculation formula of the coordinates of any point on the explosion range curve of propane, air, nitrogen and water vapor in fig. 1 is as follows:
a. b is a formula correction coefficient;
s2, combining the explosion curves, and pre-judging the operation safety of the device according to the distance between the working point and the explosion curves;
s3, combining with the pre-judgment to perform corresponding explosion-proof operation.
Preferably, the production device is controlled by adopting an interlocking control valve and is provided with an explosion-proof alarm device.
The flow rate of the material flow in the step S1 comprises propane gas flow rate, air flow rate, nitrogen flow rate, water vapor flow rate and tail gas flow rate.
The explosion-proof control method for producing acrylic acid by using propane oxidation is characterized in that when the working condition point is close to the calculated explosion curve, an alarm device is triggered to remind an operator to adjust the device.
When the working point reaches the explosion interlocking curve, the device cuts off the propane in an interlocking way and carries out safe replacement on the acrylic acid reactor.
The explosion-proof curve data, the calculation formula and the corresponding interlocking control valve are required to be input into the sis system and are operated and controlled by the sis system.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. An explosion-proof control method for producing acrylic acid by using propane oxidation is characterized by comprising the following steps:
step S1, calculating an explosion curve matched with a specific operation condition through monitoring the flow of each material in the production device, as shown in figure 1;
s2, combining the explosion curves, and pre-judging the operation safety of the device according to the distance between the working point and the explosion curves;
s3, combining with the pre-judgment to perform corresponding explosion-proof operation.
2. The explosion-proof control method for producing acrylic acid by using propane oxidation according to claim 1, wherein the production device is controlled by adopting an interlocking control valve and is provided with an explosion-proof alarm device.
3. The explosion-proof control method for producing acrylic acid by oxidation of propane according to claim 1, wherein the flow rate of the stream in step S1 includes propane gas flow rate, air flow rate, nitrogen flow rate, water vapor flow rate, and tail gas flow rate, and the explosion curve is calculated based on these flow rates, and the operating point is calculated.
4. The explosion-proof control method for producing acrylic acid by oxidation of propane according to claim 3, wherein when the explosion curve is calculated for the approach of the operating point, an alarm device is triggered to remind an operator to adjust the device.
5. The explosion-proof control method for acrylic acid production process by propane oxidation according to claim 3, wherein when an explosion linkage curve is reached for the operating point, the device cuts off propane by interlocking and performs safe replacement of the acrylic acid reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310485884.3A CN116594433A (en) | 2023-05-04 | 2023-05-04 | Explosion-proof control method for acrylic acid production process by using propane oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310485884.3A CN116594433A (en) | 2023-05-04 | 2023-05-04 | Explosion-proof control method for acrylic acid production process by using propane oxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116594433A true CN116594433A (en) | 2023-08-15 |
Family
ID=87594743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310485884.3A Pending CN116594433A (en) | 2023-05-04 | 2023-05-04 | Explosion-proof control method for acrylic acid production process by using propane oxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116594433A (en) |
-
2023
- 2023-05-04 CN CN202310485884.3A patent/CN116594433A/en active Pending
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