CN210560167U - Device for preparing natural benzaldehyde through jet continuous hydrolysis - Google Patents
Device for preparing natural benzaldehyde through jet continuous hydrolysis Download PDFInfo
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- CN210560167U CN210560167U CN201920912099.0U CN201920912099U CN210560167U CN 210560167 U CN210560167 U CN 210560167U CN 201920912099 U CN201920912099 U CN 201920912099U CN 210560167 U CN210560167 U CN 210560167U
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Abstract
The utility model discloses a spray continuous hydrolysis and prepare natural benzaldehyde preparation facilities, belong to the intensive processing field of agriculture and forestry chemical products, a spray continuous hydrolysis and prepare natural benzaldehyde preparation facilities, raw materials heating coil fixes on storage device, storage device's discharge end passes a lateral wall of hydrolysis cauldron and extends to the inside of hydrolysis cauldron and the fixed intercommunication of raw materials shower nozzle, alkali lye heating coil fixes the lower part at the hydrolysis cauldron, the fixed intercommunication of feed liquor end of alkali lye circulating device is in the hydrolysis cauldron lower part, the liquid outlet end of alkali lye circulating device passes the opposite side wall of hydrolysis cauldron and extends to the inside of hydrolysis cauldron and the fixed intercommunication of alkali lye shower nozzle, the fixed intercommunication of condensation separation device's one end is at the top of hydrolysis cauldron, the fixed intercommunication of the other end of condensation separator is in the one side of hydrolysis cauldron. The utility model discloses a spray continuous hydrolysis preparation natural benzaldehyde preparation facilities adopts the raw materials of heating and the hydrolyzate of boiling to spray the mode of offset with vaporific form and hydrolysises.
Description
Technical Field
The utility model belongs to the intensive processing field of agriculture and forestry chemical products especially relates to a spray preparation facilities of preparing natural benzaldehyde of continuous hydrolysis.
Background
The natural benzaldehyde is a main component in the bitter almond oil extract, can also be extracted from apricot, cherry, bay leaves and peach pit, is widely used in the industries of food, beverage, essence, tobacco and the like, has higher and higher requirements on food safety along with the improvement of living standard, and is more prone to using safer and healthier natural food additives. The natural benzaldehyde has special almond smell and exists in essential oil such as cinnamon oil, bitter almond oil, walnut oil and the like in a large amount, the idea that natural compounds are healthier than synthetic compounds is reflected in food laws and regulations, the demand of the natural benzaldehyde is increasing day by day at present, and the natural benzaldehyde belongs to one of international and domestic commodities with short supply of spices; due to the limited resources of natural plants, the market demand has not been met as a direct extraction from nature. The food additive benzaldehyde prepared by hydrolyzing the cinnamaldehyde is natural benzaldehyde which is definitely specified by national standards GB 28320-2012 of food safety including FBMA, COE, DFI and food safety.
At present, the natural benzaldehyde product is produced with cinnamaldehyde as main material and through hydrolysis in alkaline condition. The method is characterized in that cinnamic aldehyde is added into a reaction kettle containing an alkaline solution in a dropping or one-time adding mode, under a boiling state, the cinnamic aldehyde is subjected to a reverse aldol condensation reaction to generate benzaldehyde, acetaldehyde and the like, and the benzaldehyde acetaldehyde generated by the reaction is evaporated by using water vapor so that the reaction is carried out in a direction beneficial to the generation of benzaldehyde. Because the hydrolysis of the cinnamaldehyde to prepare the benzaldehyde is a reversible reaction, the cinnamaldehyde serving as a reaction raw material cannot be hydrolyzed in time, the generated benzaldehyde and acetaldehyde cannot be taken out in time, the reaction raw material and the product are retained for a long time at an alkaline and higher temperature, the polymerization, the disproportionation and other reactions are easy to occur, a large amount of byproduct polymers are generated, the reaction efficiency is influenced, the reaction yield is reduced, and the preparation cost of the benzaldehyde is improved.
the cinnamic aldehyde is prepared by using cinnamic aldehyde which is dropwise or once added and is difficult to disperse in alkali liquor, is not fully contacted with alkali liquor, cannot be hydrolyzed in time, directly influences hydrolysis efficiency, has longer retention time at alkali liquor and higher temperature and generates more side reactions, domestic patent CN101648853A takes cinnamon oil or meat aldehyde as a raw material, uses hydroxypropyl beta-cyclopropene as an accelerator, carries out cinnamic aldehyde under an alkaline condition, prepares benzaldehyde by solvent extraction and concentration, uses an organic solvent, has difficulty in separating the organic solvent, has the defect that the product quality is easy to bring in a trace amount of organic solvent, Chinese patent CN108329196A takes an oxide of V, Ti, Ag, Ba and Mg or two or three composite oxides thereof as a catalyst, is introduced with O2 or air as an oxygen source, enters a fixed bed reactor after compressed air or oxidation atomization, obtains a natural benzaldehyde product, is easily oxidized into benzoic acid, generates byproducts, increases the extraction difficulty of benzaldehyde, affects the product quality, and is subjected to a high-selectivity reaction by-phase oxidation reaction with ozone transfer technology (CN 63866, CN) which is used as a high-94-2, has the similar to the natural benzaldehyde-2, the similar to the natural benzaldehyde preparation technology of benzoic aldehyde which is easily prepared by-94, has the environmental pollution-2, the environmental pollution of the environmental pollution caused by-caused by the environmental pollution of the environment, the environmental protection of the environmental protection and the environmental protection of the environment, and the environment, and the environment of the environment.
The method for preparing benzaldehyde by hydrolyzing cinnamaldehyde in a liquid phase has the defects of nonuniform dispersion of cinnamaldehyde, insufficient contact between alkali liquor and cinnamaldehyde, low hydrolysis efficiency, overlong detention time of cinnamaldehyde in alkali liquor and more byproducts.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a spray preparation device for continuous hydrolysis preparation of natural benzaldehyde, the raw materials that adopt the heating and the hydrolyzate of boiling spray the mode of offset with vaporific form and hydrolyze, improve the rate of hydrolysis to need not use the solvent.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a device for preparing natural benzaldehyde by continuous jetting hydrolysis, which comprises a hydrolysis kettle, a storage device, an alkali liquor circulating device, a condensation separation device, an alkali liquor nozzle, an alkali liquor heating coil, a raw material heating coil and a raw material nozzle, wherein the raw material heating coil is fixed on the storage device, the heating end of the raw material heating coil is positioned in the storage device, the discharge end of the storage device passes through one side wall of the hydrolysis kettle and extends to the interior of the hydrolysis kettle to be fixedly communicated with the raw material nozzle, the raw material nozzle is positioned at the upper part of the hydrolysis kettle, the alkali liquor heating coil is fixed at the lower part of the hydrolysis kettle, the heating end of the alkali liquor heating coil is positioned in the hydrolysis kettle, the liquid inlet end of the alkali liquor circulating device is fixedly communicated with the lower part of the hydrolysis kettle, the liquid outlet end of the alkali liquor circulating device passes through the other side wall of, the alkali liquor spray nozzle is located the upper portion of the hydrolysis kettle, the alkali liquor spray nozzle and the raw material spray nozzle are arranged oppositely, one end of the condensation separation device is fixedly communicated with the top of the hydrolysis kettle, and the other end of the condensation separation device is fixedly communicated with one side of the hydrolysis kettle and located between the alkali liquor heating coil and the alkali liquor spray nozzle.
Preferably, the raw material spray head and the alkali liquor spray head are both obliquely arranged upwards.
Preferably, the installation elevation angle of the raw material spray heads is 15 degrees, the alkali liquor spray heads are divided into an upper row and a lower row, the installation elevation angle of the alkali liquor spray heads on the upper row is 12 degrees, and the installation elevation angle of the alkali liquor spray heads on the lower row is 15 degrees.
Preferably, storage device includes the raw materials measuring pump, the material conveying pipe, the raw materials storage tank, the raw materials level gauge, the raw materials dog-house, the temperature instrument, with the unloading valve, the raw materials dog-house sets up the top at the raw materials storage tank, raw materials heating coil sets up on the raw materials storage tank, the fixed intercommunication of feed end of material conveying pipe is in the bottom of raw materials storage tank, the discharge end and the raw materials shower nozzle intercommunication of material conveying pipe, the material measuring pump communicates with the material conveying pipe, the inside of raw materials storage tank is stretched into to the one end of temperature instrument, the raw materials level gauge sets up on the lateral wall of raw materials storage tank, the unloading valve sets up.
Preferably, the alkali liquor circulating device comprises an alkali liquor circulating pipe, an alkali liquor valve and an alkali liquor circulating pump, wherein the alkali liquor valve is arranged on the alkali liquor circulating pipe, and the alkali liquor circulating pump is communicated with the alkali liquor circulating pipe.
Preferably, condensation separation device includes the air duct, the condenser, the discharging pipe, oil water separator, mouth and wet return are collected to benzaldehyde, the inlet end of air duct and the fixed intercommunication in top of hydrolysis kettle, the fixed intercommunication in the upper portion of condenser of the end of giving vent to anger of air duct, the fixed intercommunication in the bottom of condenser of the feed end of discharging pipe, the fixed intercommunication in oil water separator's top of the discharge end of discharging pipe, benzaldehyde is collected the mouth and is established in oil water separator's bottom, the fixed intercommunication in oil water separator's upper portion of the end of intaking of wet return, the water outlet end and the fixed intercommunication of hydrolysis kettle of wet return.
Preferably, the middle upper part of the hydrolysis kettle is provided with a sight glass, and the sight glass is positioned between the alkali liquor heating coil and the water outlet end of the water return pipe.
Preferably, a flow meter is arranged on the water return pipe.
Preferably, the hydrolysis kettle, the raw material conveying pipe, the alkali liquor circulating pipe and the water return pipe are all provided with heat insulation layers outside.
Preferably, the bottom of the hydrolysis kettle is provided with a slag discharge port.
The utility model has the advantages that:
1. the utility model discloses a shower nozzle is with raw materials and alkali lye intensive dispersion to the mode of spraying gets into the upper portion of the cauldron of hydrolysising simultaneously with raw materials and alkali lye, fully increased the area of contact of raw materials with the hydrolysate, promotes the quick hydrolysis of raw materials.
2. The raw materials are heated before the reaction, which is beneficial to improving the hydrolysis rate of the cinnamic aldehyde.
3. During hydrolysis, steam generated by the hydrolysis product benzaldehyde is timely taken out, so that the hydrolysis product is prevented from being retained in the hydrolysis kettle, side reactions such as polymerization and disproportionation are reduced, and the utilization rate of raw materials is improved.
4. The hydrolysis product can be continuously collected, and a small amount of polymer and impurities can be continuously discharged, so that the continuous hydrolysis of the raw material is realized.
5. The benzaldehyde is hydrolyzed in the hydrolysis kettle in a spraying mode, the process is simple, the operation is simple and convenient, and the treatment capacity is large.
6. The utility model discloses need not use the solvent, the moisture of collection continues the retrieval and utilization, and the environmental protection is green pollution-free, and the result separation is simple and convenient to benzaldehyde naturalness is high.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
The labels in the figures are: 1-a hydrolysis kettle, 2-a storage device, 21-a raw material metering pump, 22-a raw material conveying pipe, 23-a raw material storage tank, 24-a raw material liquid level meter, 25-a raw material feeding port, 26-a temperature instrument, 27-a blanking valve, 3-an alkali liquor circulating device, 31-an alkali liquor circulating pipe, 32-an alkali liquor valve, 33-an alkali liquor circulating pump, 4-a condensation and separation device, 41-an air guide pipe, 42-a condenser, 43-a discharging pipe, 44-an oil-water separator, 45-a benzaldehyde collecting port, 46-a water return pipe, 5-an alkali liquor spray head, 6-an alkali liquor heating coil, 7-a raw material heating coil, 8-a raw material spray head, 9-a slag discharge port, 10-a viewing mirror and 11-.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Those not described in detail in this specification are within the skill of the art. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in fig. 1, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in figure 1, a device for preparing natural benzaldehyde by continuous jetting hydrolysis, comprising a hydrolysis kettle 1, a storage device 2, an alkali liquor circulating device 3, a condensation separation device 4, an alkali liquor spray nozzle 5, an alkali liquor heating coil 6, a raw material heating coil 7 and a raw material spray nozzle 8, wherein the alkali liquor heating coil 6 is a steam heating coil, the raw material heating coil 7 is fixed on the storage device 2, the heating end of the raw material heating coil 7 is positioned inside the storage device 2, the discharge end of the storage device 2 passes through the left side wall of the hydrolysis kettle 1 and extends to the inside of the hydrolysis kettle 1 to be fixedly communicated with the raw material spray nozzle 8, the raw material spray nozzle 8 is positioned at the upper part of the hydrolysis kettle 1, the alkali liquor heating coil 6 is fixed at the lower part of the hydrolysis kettle 1, the heating end of the alkali liquor heating coil 6 is positioned inside the hydrolysis kettle 1, and the liquid inlet end of the alkali liquor circulating device, the liquid outlet end of an alkali liquor circulating device 3 penetrates through the right side wall of the hydrolysis kettle 1 to extend to the interior of the hydrolysis kettle 1 and is fixedly communicated with an alkali liquor spray head 5, the alkali liquor spray head 5 is positioned at the upper part of the hydrolysis kettle 1, the alkali liquor spray head 5 and a raw material spray head 8 are oppositely arranged left and right, one end of a condensation separating device 4 is fixedly communicated with the top of the hydrolysis kettle 1, the other end of the condensation separating device is fixedly communicated with the right side of the hydrolysis kettle 1 and is positioned between an alkali liquor heating coil 6 and the alkali liquor spray head 5, a slag discharge opening 9 is arranged at the bottom of the hydrolysis kettle 1, raw materials are heated in a storage device 2 through a raw material heating coil 7 and are heated to 60-200 ℃, hydrolysis liquid is heated to be boiled and kept in a boiling state through the alkali liquor heating coil 6 at the middle lower part in the hydrolysis kettle 1, the storage device 2 pumps the heated raw materials to the raw material, meanwhile, the alkali liquor circulating device 3 pumps boiling hydrolysate to the alkali liquor spray head 5, the hydrolysate is sprayed to the inside of the hydrolysis kettle 1 in a vaporific mode through the alkali liquor spray head 5, heated atomized raw materials and the boiling atomized hydrolysate are dispersed in the hydrolysis kettle 1 in a hedging collision mode, the hydrolysis reaction is carried out through sufficient mixing, benzaldehyde generated by hydrolysis in the hydrolysis kettle 1 is timely brought into the condensation separation device 4 through steam generated in the hydrolysis kettle 1, the benzaldehyde is discharged and collected through the condensation separation device 4 after oil-water separation, water generated by oil-water separation flows back to the hydrolysis kettle 1 for recycling as hydrolysis water, a small amount of impurities generated in the hydrolysis process and heavy components in the raw materials are continuously discharged through a slag discharge port 9 at the bottom of the hydrolysis kettle 1, and continuous hydrolysis is realized.
Concretely, equal tilt up installation of raw materials shower nozzle 8 and alkali lye shower nozzle 5, the installation angle of elevation of raw materials shower nozzle 8 is 15, raw materials shower nozzle 8 is 1 altogether, alkali lye shower nozzle 5 divide into two rows from top to bottom, alkali lye shower nozzle 5 is 10 altogether, the installation angle of elevation of the alkali lye shower nozzle 5 of going up the row is 12, the installation angle of elevation of the alkali lye shower nozzle 5 of going down the row is 15, and use the play liquid end of alkali lye circulating pipe 31 to be evenly distributed in the 1/2 circumference at center, raw materials shower nozzle 8 and alkali lye shower nozzle 5 through the slope installation, make spun raw materials and hydrolysis liquid be tilt up and spray the offset, improve area of contact greatly, make to hydrolyze more fully, wherein, alkali lye shower nozzle 5 and raw materials shower nozzle 8 are the shower nozzle that takes the.
Specifically, the material storage device 2 includes a raw material metering pump 21, a raw material delivery pipe 22, a raw material storage tank 23, a raw material level meter 24, a raw material feeding port 25, a temperature instrument 26, a material discharge valve 27, wherein the raw material feeding port 25 is arranged at the top of the raw material storage tank 23, a raw material heating coil pipe 7 is arranged on the raw material storage tank 23, the feeding end of the raw material delivery pipe 22 is fixedly communicated with the bottom of the raw material storage tank 23, the discharging end of the raw material delivery pipe 22 is communicated with a raw material spray head 8, the raw material metering pump 21 is communicated with the raw material delivery pipe 22, one end of the temperature instrument 26 extends into the raw material storage tank 23, the raw material level meter 24 is arranged on the side wall of the raw material storage tank 23, the blanking valve 27 is arranged on the raw material delivery pipe 22, specifically arranged on the pipe section of the raw material delivery pipe 22 between the raw material, the raw materials are heated to 60-200 ℃ in the raw material storage tank 23 through the raw material heating coil 7, the temperature in the raw material storage tank 23 is observed through the temperature instrument 26, the liquid level of the raw materials in the raw material storage tank 23 is observed through the raw material liquid level meter 24, when the raw materials need to be thrown into the hydrolysis kettle 1, the blanking valve 27 is opened, the raw materials are pumped to the raw material spray nozzle 8 through the raw material metering pump 21, and the raw materials are atomized and sprayed out through the raw material spray nozzle 8.
Specifically, alkali lye circulating device 3 includes alkali lye circulating pipe 31, alkali lye valve 32, and alkali lye circulating pump 33, alkali lye circulating pump 33 is the measuring pump, alkali lye valve 32 sets up on alkali lye circulating pipe 31, specifically set up the pipeline section between hydrolysis cauldron 1 and alkali lye circulating pump 33, alkali lye circulating pump 33 and alkali lye circulating pipe 31 intercommunication, the upper end of alkali lye circulating pipe 31 is located hydrolysis cauldron 1's upper portion, the lower extreme of alkali lye circulating pipe 31 is located hydrolysis cauldron 1's lower part, when needing to squeeze into hydrolysis cauldron 1, open alkali lye valve 32, take out the hydrolysis to alkali lye shower nozzle 5 through alkali lye circulating pump 33, and spray by the 5 atomizing of alkali lye shower nozzle.
Specifically, the condensation separation device 4 comprises a gas guide pipe 41, a condenser 42, a discharge pipe 43, an oil-water separator 44, a benzaldehyde collecting port 45 and a water return pipe 46, wherein the condenser 42 is a spiral plate condenser, the oil-water separator 44 is a cylindrical tank body with a cone bottom, a gas inlet end of the gas guide pipe 41 is fixedly communicated with the top of the hydrolysis kettle 1, a gas outlet end of the gas guide pipe 41 is fixedly communicated with the upper part of the condenser 42, a gas inlet end of the discharge pipe 43 is fixedly communicated with the bottom of the condenser 42, a gas outlet end of the discharge pipe 43 is fixedly communicated with the top of the oil-water separator 44, the benzaldehyde collecting port 45 is arranged at the bottom of the oil-water separator 44, a water inlet end of the water return pipe 46 is fixedly communicated with the upper part of the oil-water separator 44, a water outlet end of the water return pipe 46 is fixedly communicated with the hydrolysis kettle 1, steam brings benzaldehyde and acetaldehyde into the gas guide pipe 41, the benzaldehyde and, the water that oil-water separation produced flows back to hydrolysis kettle 1 in through wet return 46 and recycles, and benzaldehyde collects mouthful 45 discharge through benzaldehyde and collects, and is specific, and benzaldehyde collects mouthful 45 and links to each other with the cooler, and exhaust benzaldehyde is collected in the cooler internal cooling.
Specifically, hydrolysis kettle 1's well upper portion is equipped with sight glass 10, sight glass 10 is located between alkali lye heating coil 6 and wet return 46's the play water end, the hydrolytic liquid volume of joining to sight glass 10 middle part, conveniently observe the hydrolytic liquid volume of joining through sight glass 10, be equipped with flowmeter 11 on the wet return 46, observe the flow condition of wet return 46 through flowmeter 11, hydrolysis kettle 1, raw materials conveying pipe 22, alkali lye circulating pipe 31, and wet return 46's outside all is equipped with the heat preservation, play the heat preservation effect.
The following is a specific preparation process:
1. clean water is added to the oil-water separator 44 until water is discharged from the water return pipe 46.
2. Adding prepared alkali liquor into the hydrolysis kettle 1 to the middle part of the sight glass 10, starting steam, enabling the steam to enter the alkali liquor heating coil 6, heating the alkali liquor to a boiling state through the alkali liquor heating coil 6, and enabling generated steam to return into the hydrolysis kettle 1 through a water return pipe 46 which is collected and condensed to an oil-water separator 44.
3. Spraying continuous hydrolysis: starting an alkali liquor circulating pump 33, spraying atomized alkali liquor into the hydrolysis kettle 1 through 10 alkali liquor spray nozzles 5 arranged in the hydrolysis kettle 1, starting a raw material metering pump 21, spraying hydrolysis raw materials into the hydrolysis kettle 1, enabling the hydrolysis raw materials and the hydrolysis raw materials to be fully contacted in the hydrolysis kettle 1, taking out benzaldehyde generated in the hydrolysis process through water vapor, and processing the benzaldehyde through a condensation separation device 4 to obtain finished benzaldehyde.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A preparation device for preparing natural benzaldehyde by spraying continuous hydrolysis, which is characterized in that,
comprises a hydrolysis kettle, a material storage device, an alkali liquor circulating device, a condensation separation device, an alkali liquor spray head, an alkali liquor heating coil, a raw material heating coil and a raw material spray head;
the raw material heating coil is fixed on the storage device, the heating end of the raw material heating coil is positioned in the storage device, the discharge end of the storage device penetrates through one side wall of the hydrolysis kettle to extend to the interior of the hydrolysis kettle and is fixedly communicated with the raw material spray head, and the raw material spray head is positioned at the upper part of the hydrolysis kettle;
the alkali liquor heating coil is fixed at the lower part of the hydrolysis kettle, and the heating end of the alkali liquor heating coil is positioned in the hydrolysis kettle;
the liquid inlet end of the alkali liquor circulating device is fixedly communicated with the lower part of the hydrolysis kettle, the liquid outlet end of the alkali liquor circulating device penetrates through the other side wall of the hydrolysis kettle to extend to the inside of the hydrolysis kettle to be fixedly communicated with the alkali liquor spray head, and the alkali liquor spray head is positioned at the upper part of the hydrolysis kettle;
the alkali liquor spray head and the raw material spray head are oppositely arranged;
one end of the condensation separation device is fixedly communicated with the top of the hydrolysis kettle, and the other end of the condensation separation device is fixedly communicated with one side of the hydrolysis kettle and is positioned between the alkali liquor heating coil and the alkali liquor spray head.
2. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 1, wherein:
the raw material spray head and the alkali liquor spray head are both obliquely arranged upwards.
3. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 2, wherein:
the installation elevation angle of the raw material spray head is 15 degrees;
the alkali liquor spray heads are divided into an upper row and a lower row, the installation elevation angle of the alkali liquor spray heads on the upper row is 12 degrees, and the installation elevation angle of the alkali liquor spray heads on the lower row is 15 degrees.
4. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 1, wherein:
the storage device comprises a raw material metering pump, a raw material conveying pipe, a raw material storage tank, a raw material liquid level meter, a raw material feeding port, a temperature instrument and a discharging valve;
the raw material feeding port is arranged at the top of the raw material storage tank;
the raw material heating coil is arranged on the raw material storage tank;
the feed end of the raw material conveying pipe is fixedly communicated with the bottom of the raw material storage tank, and the discharge end of the raw material conveying pipe is communicated with the raw material spray head;
the raw material metering pump is communicated with the raw material conveying pipe;
one end of the temperature instrument extends into the raw material storage tank;
the raw material liquid level meter is arranged on the side wall of the raw material storage tank;
the blanking valve is arranged on the raw material conveying pipe.
5. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 4, wherein:
the alkali liquor circulating device comprises an alkali liquor circulating pipe, an alkali liquor valve and an alkali liquor circulating pump;
the alkali liquor valve is arranged on the alkali liquor circulating pipe;
the alkali liquor circulating pump is communicated with the alkali liquor circulating pipe.
6. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis according to claim 5, wherein:
the condensation separation device comprises a gas guide pipe, a condenser, a discharge pipe, an oil-water separator, a benzaldehyde collecting port and a water return pipe;
the air inlet end of the air guide pipe is fixedly communicated with the top of the hydrolysis kettle, and the air outlet end of the air guide pipe is fixedly communicated with the upper part of the condenser;
the feeding end of the discharging pipe is fixedly communicated with the bottom of the condenser, and the discharging end of the discharging pipe is fixedly communicated with the top of the oil-water separator;
the benzaldehyde collecting port is arranged at the bottom of the oil-water separator;
the water inlet end of the water return pipe is fixedly communicated with the upper part of the oil-water separator, and the water outlet end of the water return pipe is fixedly communicated with the hydrolysis kettle.
7. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 6, wherein:
and a sight glass is arranged at the middle upper part of the hydrolysis kettle and is positioned between the alkali liquor heating coil and the water outlet end of the water return pipe.
8. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 6, wherein:
and a flowmeter is arranged on the water return pipe.
9. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 6, wherein:
and heat insulation layers are arranged outside the hydrolysis kettle, the raw material conveying pipe, the alkali liquor circulating pipe and the water return pipe.
10. The apparatus for preparing natural benzaldehyde by spray continuous hydrolysis as set forth in claim 1, wherein:
and a slag discharge port is arranged at the bottom of the hydrolysis kettle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112979437A (en) * | 2021-03-05 | 2021-06-18 | 江苏诺盟化工有限公司 | Preparation method of benzaldehyde and special reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112979437A (en) * | 2021-03-05 | 2021-06-18 | 江苏诺盟化工有限公司 | Preparation method of benzaldehyde and special reactor |
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