CN203075917U - Oxidation reactor feed system of alcohol ketone device - Google Patents
Oxidation reactor feed system of alcohol ketone device Download PDFInfo
- Publication number
- CN203075917U CN203075917U CN 201220678298 CN201220678298U CN203075917U CN 203075917 U CN203075917 U CN 203075917U CN 201220678298 CN201220678298 CN 201220678298 CN 201220678298 U CN201220678298 U CN 201220678298U CN 203075917 U CN203075917 U CN 203075917U
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- heat exchanger
- outlet
- passivator
- oxidation reactor
- inlet
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Abstract
The utility model relates to an oxidation reactor feed system of an alcohol ketone device. The oxidation reactor feed system of the alcohol ketone device comprises a feed pump, a heat exchanger, a mixer and a passivator feed pipe, wherein the outlet pipe of the feed pump is connected with the inlet tube pass of the heat exchange A; the outlet tube pass of the heat exchanger A is connected with the inlet tube pass of the heat exchanger B; the outlet tube pass of the heat exchanger B is connected with the inlet shell pass of the heat exchanger C; the outlet shell pass of the heat exchanger C is connected with the inlet shell pass of the heat exchanger D; the outlet shell pass of the heat exchanger D is connected with the inlet shell pass of the heat exchanger E; the outlet shell pass of the heat exchanger E is connected with the inlet tube pass of a steam heater; the outlet tube pass of the steam heater is connected with the inlet of the mixer; the outlet of the passivator feed pipe connected with a passivator storage tank is connected with the inlet of the mixer; and the outlet of the mixer is connected with the inlet of an oxidation reactor. By using the feed system, the amount of the passivator entering the oxidation reactor is not reduced, the pipeline and the heat exchanger tube bundle are prevented from being blocked by the passivator, and the heat resistance of the heat exchanger is not increased.
Description
Technical field
The utility model relates to a kind of alcohol ketone device oxidation reactor feed system.
Background technology
The alcohol ketone production technology is to be raw materials for production with cyclohexane give, in 5 oxidation reactors, produce cyclohexyl hydroperoxide through the oxygen deprivation oxidation, again through pre-concentration, washing, dehydrating operations, cyclohexyl hydroperoxide decomposes generation cyclohexanone and cyclohexanol (being alcohol ketone) under the condition that catalyst exists, at last, isolate pure alcohol/ketone mixtures through rectification process.But owing to generate in the production process of cyclohexyl hydroperoxide in air oxygen deprivation oxidation, cyclohexyl hydroperoxide is a unstable material, when running into the iron ion of reactor wall, can secondary catalytic action be arranged to oxidation reaction, cause the further oxidation reaction of cyclohexyl, cause the minimizing of target product.Therefore, need the iron ion of reactor wall is carried out Passivation Treatment, reduce the side reaction conversion ratio.Promptly the device cycle beginning of producing need carry out passivation first to reactor, but in normal productive process, because passivating film is met acid and water can come off, with regard to needing the passivating film of loss is replenished, promptly by in hot alkane material, injecting passivator, replenish in the production process consumption to the reactor passivating film.This kind passivating film is the complex compound that sodium pyrophosphate and iron ion generate, promptly use analytically pure sodium pyrophosphate white solid powder dissolution in 50～70 ℃ distilled water, use by being mixed with the passivation first that goes into operation of 1～4% solution supplying apparatus after mixing, be mixed with in 0.02～0.08% the solution supplying apparatus normal productive process replenish lost and use.The solution that configures is injected into cyclohexane feed delivery side of pump continuously by pump, through a series of cyclohexane raw material preheating heat exchangers, finally enters and forms passivating film in the reactor.But this kind production technology has caused the obstruction of feeding line and heat exchanger tube, has caused the decline of heat exchanger heat exchange efficiency, has a strong impact on the cycle of operation of device.
The utility model content
The purpose of this utility model provides a kind of alcohol ketone device oxidation reactor feed system, be exported to feed exchanger pipeline place by injection phase by feed pump with passivator, change into and be injected into the feed vapors heater to oxidation reaction pipeline place, simultaneously set up blender in the inlet rear end, help passivator and fully mix, improve passivation effect, prevent the obstruction of pipeline with the raw material cyclohexane, prevent to influence the heat exchange effect of heat exchanger, prolonged the cycle of operation of device simultaneously.
Alcohol ketone device oxidation reactor feed system described in the utility model comprises: feed pump, heat exchanger, blender, passivator feed pipe; The feed pump outlet is connected with the import tube side of heat exchanger A, the outlet tube side of heat exchanger A is connected with the import tube side of heat exchanger B, the outlet tube side of heat exchanger B is connected with the import shell side of heat exchanger C, the outlet shell side of heat exchanger C is connected with the import shell side of heat exchanger D, the outlet shell side of heat exchanger D is connected with the import shell side of heat exchanger E, the outlet shell side of heat exchanger E is connected with the import tube side of steam heater, the outlet tube side of steam heater is connected with mixer entrance, the passivator feed pipe outlet that is connected with the passivator storage tank is connected with mixer entrance, and mixer outlet is connected with the oxidation reactor inlet.
Cyclohexane is sent to 5 oxidation reactors by feed pump, the cyclohexane liquid that in oxidation reactor tail gas, reclaims in the way, steam condensate, the gas that discharge at the oxidation reactor top and one group of heat exchanger of middle pressure steam carry out preheating, final temperature rise to 175～190 ℃ enters first oxidation reactor then and carries out oxidation.Passivator is sodium pyrophosphate, and chemical composition is NaP
2O
7.10H
2O, outward appearance is the white solid powdered substance, the pH value is 9.9～10.7.The sodium pyrophosphate powder dissolution in 50～70 ℃ distilled water, is used by being mixed with in 0.02～0.08% the solution supplying apparatus normal productive process replenish lost after mixing.The solution that configures is injected into the outlet of feed exchanger continuously by pump, through blender with sodium pyrophosphate solution with after cyclohexane liquid fully mixes, finally enter and form passivating film replenish lost amount in the oxidation reactor.
Alcohol ketone device oxidation reactor feed system described in the utility model, avoided since passivator in the process of the middle operation of pipeline and heat exchanger, owing to temperature increase gradually shift to an earlier date with pipeline inwall and heat exchanger in the iron ion of restraining form passivating film, reduce the passivation dosage that enters oxidation reactor, influenced the passivation effect of oxidation reaction.Avoided the obstruction of pipeline and heat exchanger tube.Avoid the increase of heat exchanger thermal resistance, influenced the heat exchange effect of heat exchanger.
Description of drawings
Fig. 1 alcohol ketone device oxidation reactor feed system
1 feed pump, 2 heat exchanger A, 3 heat exchanger B, 4 heat exchanger C, 5 heat exchanger D, 6 heat exchanger E, 7 steam heaters, 8 passivator feed pipes, 9 passivator storage tanks, 10 blenders, 11 oxidation reactors
The specific embodiment
Alcohol ketone device oxidation reactor feed system described in the utility model comprises: feed pump 1, heat exchanger, blender 10, passivator feed pipe 8; The feed pump outlet is connected with the import tube side of heat exchanger A2, the outlet tube side of heat exchanger A is connected with the import tube side of heat exchanger B3, the outlet tube side of heat exchanger B is connected with the import shell side of heat exchanger C4, the outlet shell side of heat exchanger C is connected with the import shell side of heat exchanger D5, the outlet shell side of heat exchanger D is connected with the import shell side of heat exchanger E6, the outlet shell side of heat exchanger E is connected with the import tube side of steam heater 7, the outlet tube side of steam heater is connected with blender 10 inlets, passivator feed pipe 8 outlets that are connected with passivator storage tank 9 are connected with mixer entrance, and mixer outlet is connected with oxidation reactor 11 inlets.
Claims (1)
1. an alcohol ketone device oxidation reactor feed system comprises: feed pump, heat exchanger, blender, passivator feed pipe; It is characterized in that: the feed pump outlet is connected with the import tube side of heat exchanger A, the outlet tube side of heat exchanger A is connected with the import tube side of heat exchanger B, the outlet tube side of heat exchanger B is connected with the import shell side of heat exchanger C, the outlet shell side of heat exchanger C is connected with the import shell side of heat exchanger D, the outlet shell side of heat exchanger D is connected with the import shell side of heat exchanger E, the outlet shell side of heat exchanger E is connected with the import tube side of steam heater, the outlet tube side of steam heater is connected with mixer entrance, the passivator feed pipe outlet that is connected with the passivator storage tank is connected with mixer entrance, and mixer outlet is connected with the oxidation reactor inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678298 CN203075917U (en) | 2012-12-10 | 2012-12-10 | Oxidation reactor feed system of alcohol ketone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678298 CN203075917U (en) | 2012-12-10 | 2012-12-10 | Oxidation reactor feed system of alcohol ketone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203075917U true CN203075917U (en) | 2013-07-24 |
Family
ID=48821800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220678298 Expired - Fee Related CN203075917U (en) | 2012-12-10 | 2012-12-10 | Oxidation reactor feed system of alcohol ketone device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203075917U (en) |
-
2012
- 2012-12-10 CN CN 201220678298 patent/CN203075917U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20211210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |