CN108727313B - Maleic anhydride test reaction system - Google Patents
Maleic anhydride test reaction system Download PDFInfo
- Publication number
- CN108727313B CN108727313B CN201810953208.3A CN201810953208A CN108727313B CN 108727313 B CN108727313 B CN 108727313B CN 201810953208 A CN201810953208 A CN 201810953208A CN 108727313 B CN108727313 B CN 108727313B
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- Prior art keywords
- reactor
- butane
- flow rate
- vaporizer
- test
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 title claims abstract description 18
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000001273 butane Substances 0.000 claims abstract description 43
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000006200 vaporizer Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000004880 explosion Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/60—Two oxygen atoms, e.g. succinic anhydride
Abstract
The utility model provides a maleic anhydride's test reaction system, includes butane ball jar and air compressor, butane ball jar connecting pump, and the vaporizer is connected to the pump, and the test reactor is connected to the vaporizer, and air compressor connects the test reactor, and the reactor is connected to the one end of test reactor, and the gas cooler is connected to the other end, is provided with flow rate switch on vaporizer and the air compressor, and flow rate switch passes through remote control, the test reactor the below set up butane's maximum flow rate monitoring sensor and siren outward, test reactor and reactor in set up circulated fused salt outward, vaporizer and air compressor and reactor direct intercommunication in parallel pipeline, the below of this pipeline is provided with the passageway converter. The invention has the following beneficial effects: the reaction can reach the maximum proportioning efficiency, then the whole reaction is carried out, the product of the reaction can not be wasted, the product can continuously enter the cooling device, the production efficiency is greatly improved, and the safety coefficient is increased.
Description
Technical Field
The invention belongs to the field of maleic anhydride test reaction systems, and particularly relates to a maleic anhydride test reaction system.
Background
The existing maleic anhydride production system is that air is compressed, mixed with vaporized n-butane and added to a tubular catalytic reactor. The reactor is provided with circulating molten salt. The circulated salt is cooled in an external boiler, in which high pressure steam is generated. The reactor outlet gas contains maleic anhydride, is cooled in a heat exchanger, and generates additional high pressure steam. The resultant gaseous material is then further cooled in a switched cooler which recovers heat by preheating the boiler feed water. The cooled gas material enters the bottom of the absorption tower.
Since the proportion of butane to air is very critical, if the butane is less and the air is more, the reaction is insufficient, and the finally synthesized maleic anhydride is less, so that the space of the reactor is wasted; if the air is used less and the butane is used more, a certain risk factor exists, and the reactor may explode.
In the event of an explosion, the consequences are not to be expected, and the overall production line is very harmful, there is currently no device which is able to precisely control the air and butane ratio into the reactor.
The existing air inlet mode is low in efficiency, air is required to be added firstly, and then butane is added, so that the efficiency is low, and the butane concentration is not adjustable.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a maleic anhydride test reaction system to solve the problems that in the existing maleic anhydride production process, gas cannot be accurately controlled, reaction maximization cannot be achieved, and production efficiency is low.
The invention is realized by the following technical scheme.
The utility model provides a maleic anhydride's test reaction system, includes butane ball jar and air compressor, butane ball jar connect the pump, the pump connect the vaporizer, the vaporizer connect the test reactor, air compressor connect the test reactor, the one end of test reactor connect the reactor, the other end connects the gas cooler, vaporizer and air compressor on be provided with flow switch, flow switch pass through remote control, the test reactor the below set up butane's maximum flow rate monitor sensor and siren, the test reactor be provided with the explosion proof box outward, test reactor and reactor in set up circulated fused salt, vaporizer and air compressor and reactor direct intercommunication have a parallel pipeline, the below of this pipeline is provided with the channel converter, including the following steps: 1) A remote control switch is remotely turned on, so that flow speed switches on the carburetor and the air compressor are simultaneously turned on; 2) Butane and air enter the test reactor at different rates, the air rate is not adjustable, the butane rate can be adjusted by remote control, and the butane speed is continuously increased to reach the preset value of the maximum flow rate monitoring sensor; 3) When the specified time is reached, molten salt in the test reactor circulates, internal gas reacts, and an explosion-proof box is arranged outside the test reactor to prevent explosion; 4) Discharging the reacted gas of the test reactor and discharging the gas to a gas cooler; 5) The channel converter changes the air inlet pipe and exhausts air from the pipeline to the reactor; 6) The gas reaction is carried out in the reactor. The optimal ratio of air and butane can be achieved through pre-testing, a testing device is further provided, even if the reactor is exploded, the reactor is only exploded, the damage to the whole production line is small, butane and air are discharged at the same time, and the production efficiency is accelerated.
Preferably, the explosion-proof box is provided with a transparent window. The transparent window enables viewing.
Preferably, the alarm is arranged outside the explosion-proof box. The sound of the alarm is not masked.
Preferably, when the butane flow rate is greater than the maximum flow rate, the flow rate is automatically reduced to the lowest first gear. It is necessary to control the flow rate above the maximum flow rate, and butane is otherwise liable to exceed the standard.
Preferably, the rear end of the cooler is connected with a switching cooler.
Preferably, the rear end of the switching cooler is connected with an absorption tower, and an oil-rich groove is arranged below the absorption tower.
Compared with the prior art: the reaction can reach the maximum proportioning efficiency, then the whole reaction is carried out, the product of the reaction can not be wasted, the product can continuously enter the cooling device, the production efficiency is greatly improved, and the safety coefficient is increased.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Description of the embodiments
The utility model provides a maleic anhydride's test reaction system, includes butane ball jar 3 and air compressor 4, butane ball jar 3 connect pump 2, pump 2 connect vaporizer 1, vaporizer 1 connect test reactor 5, its characterized in that, air compressor 4 connect test reactor 5, test reactor 5's one end connect reactor 6, the other end connects gas cooler 7, vaporizer 1 and air compressor 4 on be provided with the flow switch, the flow switch pass through remote control, test reactor 5's below set up butane's maximum flow rate monitor sensor and siren, test reactor 5 be provided with the explosion proof box outward, test reactor 5 and reactor 6 in set up circulated fused salt, vaporizer 1 and air compressor 4 and reactor 6 direct intercommunication have parallel pipeline 51, the below of this pipeline 51 is provided with channel converter 52, include the following steps: 1) Remotely opening a remote control switch to enable flow speed switches on the carburetor 1 and the air compressor 4 to be simultaneously opened; 2) Butane and air enter the test reactor 5 at different rates, the air rate is not adjustable, the butane rate can be adjusted by remote control, and the butane speed is continuously increased to reach the preset value of the maximum flow rate monitoring sensor; 3) When the specified time is reached, molten salt in the test reactor 5 circulates, internal gas reacts, and an explosion-proof box is arranged outside the test reactor 5 to prevent explosion; 4) Discharging the reacted gas of the test reactor 5 to a gas cooler 7; 5) The passage switch 52 changes the intake pipe, and exhausts from the pipe 51 to the reactor 6; 6) The reactor 6 is internally provided with a transparent window, the alarm is arranged outside the explosion-proof box, when the flow rate of butane is greater than the maximum flow rate, the flow rate is automatically reduced to the lowest level, the rear end of the cooler 7 is connected with a switching cooler 8, the rear end of the switching cooler 8 is connected with an absorption tower 9, and an oil-rich groove is arranged below the absorption tower 9.
In the use process, butane is discharged from the butane ball tank 3 through the pump 2, butane enters the vaporizer 1, the vaporizer 1 vaporizes the butane and enters the test reactor 5 along a pipeline after vaporization, air is provided with an explosion-proof box outside the test reactor 5 through the air compressor, therefore, a remote control switch is remotely opened, the flow rate switch on the vaporizer 1 and the air compressor 4 is simultaneously opened by remote wireless remote control, the vaporized butane and the vaporized air enter the test reactor 5 at different rates, the circulation rate of the air is not adjustable, the circulation rate of the butane can be adjusted through remote control, the speed of the butane is continuously increased, the butane reaches a preset value of a maximum flow rate monitoring sensor, the butane flow rate is continuously adjusted, when the preset value is reached, an alarm sounds, when the preset value is reached, molten salt in the test reactor 5 circulates, internal gas reacts, the explosion-proof box is arranged outside the test reactor 5 to prevent explosion, the reacted gas of the test reactor 5 is discharged to the gas cooler 7, the channel converter 52 changes an air inlet pipe, the butane and the air are discharged from the pipeline 6 to the reactor 6, the inside the reactor 6 is cooled down, and the anhydride is discharged from the reactor 6 to the inside the reactor 6 after the reaction is cooled, and the reaction is finished.
Either maleic anhydride formed in the reactor 5 or maleic anhydride formed in the reactor 6 may be passed through the cooler 7, the switching cooler 8, and then to the absorption column 9, and finally to the oil-rich tank.
The scope of the present invention includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the invention.
Claims (4)
1. The preparation facilities of maleic anhydride, including butane ball jar (3) and air compressor (4), butane ball jar (3) connect pump (2), pump (2) connect vaporizer (1), vaporizer (1) connect test reactor (5), its characterized in that, air compressor (4) connect test reactor (5), one end of test reactor (5) connect reactor (6), gas cooler (7) are connected to the other end, vaporizer (1) and air compressor (4) on be provided with flow rate switch, flow rate switch pass through remote control, the below of test reactor (5) set up the maximum flow rate monitor sensor and the siren of butane, reactor (5) be provided with the explosion proof box outward, test reactor (5) and reactor (6) in set up circulated fused salt, vaporizer (1) and air compressor (4) and reactor (6) direct intercommunication have a parallel pipeline (51), this below of this pipeline (1) is provided with converter (51), the below is provided with explosion proof box (52) and is arranged in the transparent window in order to include down, the step is arranged in the explosion proof box (52). 1) The remote control switch is remotely turned on, so that the flow rate switches on the vaporizer (1) and the air compressor (4) are simultaneously turned on; 2) Butane and air enter the test reactor (5) at different rates, the air rate is not adjustable, the butane rate can be adjusted by remote control, and the butane speed is continuously increased to reach the preset value of the maximum flow rate monitoring sensor; 3) When the specified time is reached, molten salt in the test reactor (5) circulates, internal gas reacts, and an explosion-proof box is arranged outside the test reactor (5) to prevent explosion; 4) Discharging the reacted gas of the test reactor (5) to a gas cooler (7); 5) The channel converter (52) changes the air inlet pipe, and exhausts air from the pipeline (51) to the reactor (6); 6) The gas reaction is carried out in the reactor (6).
2. The apparatus for producing maleic anhydride according to claim 1, wherein the flow rate is automatically reduced to the lowest level when the butane flow rate is greater than the maximum flow rate.
3. The maleic anhydride production apparatus according to claim 1, wherein the rear end of the cooler (7) is connected to a switching cooler (8).
4. The maleic anhydride production apparatus according to claim 3, wherein the rear end of the switching cooler (8) is connected to an absorption tower (9), and an oil-rich tank is provided below the absorption tower (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810953208.3A CN108727313B (en) | 2018-08-21 | 2018-08-21 | Maleic anhydride test reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810953208.3A CN108727313B (en) | 2018-08-21 | 2018-08-21 | Maleic anhydride test reaction system |
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| Publication Number | Publication Date |
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| CN108727313A CN108727313A (en) | 2018-11-02 |
| CN108727313B true CN108727313B (en) | 2023-10-31 |
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| CN201810953208.3A Active CN108727313B (en) | 2018-08-21 | 2018-08-21 | Maleic anhydride test reaction system |
Country Status (1)
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| CN (1) | CN108727313B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116182133B (en) * | 2023-01-12 | 2023-10-13 | 常州瑞华化工工程技术股份有限公司 | Device for producing high-pressure or ultrahigh-pressure steam as byproduct of maleic anhydride device and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356100A (en) * | 2014-11-14 | 2015-02-18 | 常州新日催化剂有限公司 | Method for preparing maleic anhydride by oxidation of n-butane |
| CN204724137U (en) * | 2015-05-25 | 2015-10-28 | 濮阳市盛源能源科技股份有限公司 | A kind of maleic anhydride production oxidation reaction feed arrangement |
| CN105001185A (en) * | 2015-07-21 | 2015-10-28 | 宁波浙铁江宁化工有限公司 | Maleic anhydride tail gas treatment equipment and maleic anhydride tail gas treatment process |
| CN108147483A (en) * | 2018-03-08 | 2018-06-12 | 成都兴蓉环保科技股份有限公司 | A kind of hazardous waste processing system and treatment process |
| CN207667614U (en) * | 2017-09-06 | 2018-07-31 | 宁波昊德化学工业股份有限公司 | A kind of butane oxidation reactor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1359138B1 (en) * | 1998-11-27 | 2006-02-08 | Mitsubishi Chemical Corporation | Process for the production of maleic anhydride |
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2018
- 2018-08-21 CN CN201810953208.3A patent/CN108727313B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356100A (en) * | 2014-11-14 | 2015-02-18 | 常州新日催化剂有限公司 | Method for preparing maleic anhydride by oxidation of n-butane |
| CN204724137U (en) * | 2015-05-25 | 2015-10-28 | 濮阳市盛源能源科技股份有限公司 | A kind of maleic anhydride production oxidation reaction feed arrangement |
| CN105001185A (en) * | 2015-07-21 | 2015-10-28 | 宁波浙铁江宁化工有限公司 | Maleic anhydride tail gas treatment equipment and maleic anhydride tail gas treatment process |
| CN207667614U (en) * | 2017-09-06 | 2018-07-31 | 宁波昊德化学工业股份有限公司 | A kind of butane oxidation reactor |
| CN108147483A (en) * | 2018-03-08 | 2018-06-12 | 成都兴蓉环保科技股份有限公司 | A kind of hazardous waste processing system and treatment process |
Non-Patent Citations (3)
| Title |
|---|
| 兰州石化公司2万t/a正丁烷氧化法制顺丁烯二酸酐装置工艺流程及特点;马首骥;孙凯;;石化技术与应用(04);381-384 * |
| 正丁烷法制顺酐的安全设计;廖顺燕;天津化工;第32卷(第1期);50-52 * |
| 顺酐生产火灾爆炸危险性辨识及安全对策措施;刘霞;广东化工;第43 卷(第324期);121-123 * |
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| CN108727313A (en) | 2018-11-02 |
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