Amide crude oil steam stripping process and device

Abstract

The invention relates to an amide crude oil steam stripping process and device. The specific process comprises the following steps: (1) discharging dealcoholized amide crude oil to a flushing and steaming kettle; (2) introducing steam into the impact steaming kettle from the bottom of the impact steaming kettle, performing steam stripping, and collecting impurities separated in the steam stripping process into a receiving tank; (3) after the steam stripping is completed, carrying out decompression and heating dehydration operation in the flushing and steaming kettle, and collecting impurities separated in the dehydration process into a receiving tank; and (4) discharging the dehydrated amide crude oil to a finished product tank to obtain the amide finished product crude oil. The quality of the amide crude oil is remarkably improved in a steam stripping mode, and the content of the amide crude oil is stabilized at 96% or above, so that the market competitiveness is enhanced, and the selling price is favorably increased. Meanwhile, the steps of purification and dehydration are integrated in a single kettle, so that energy is saved, the operation time is shortened, the production process is simplified, the cost is reduced, the production efficiency is improved, and the method is suitable for industrial large-scale production.

Description

Technical Field

[0001] The invention relates to the technical field of chemical oil agents, in particular to an amide crude oil stripping process and a device. Background Art

[0002] In current production, amide crude oil is filtered after alcohol removal, and then the finished crude oil is obtained. The finished crude oil has a low content and many impurities, which leads to blocked sales channels, price restrictions, and occasional unqualified products. The requirements for the front-end operation of the product are very strict, and the production of by-products needs to be reduced, which reduces the fault tolerance rate.

[0003] As the market has high requirements for product quality, in industrial production, in order to obtain higher purity products, it is also possible to purify raw materials or intermediates to obtain higher purity end products, thereby improving product quality and competitiveness.

[0004] Patent publication number CN101270062A discloses a methylene process for producing acetochlor, which has strict production conditions, complex technology, and high cost. The content of acetochlor finally separated is only above 93%.

[0005] In order to overcome the above problems, the present invention removes impurities in amide crude oil by steam stripping, directly introduces water vapor from the bottom of the kettle, so that the impurities in the crude oil diffuse into the gas phase, thereby achieving the effect of separating impurities from crude oil, improving the quality of amide crude oil, and finally stabilizing the content of finished crude oil at more than 96%. Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In order to solve the above problems, the present invention provides an amide crude oil stripping process and device, which improves the quality of amide crude oil by stripping, stabilizes its content at more than 96%, significantly improves the purity and quality of the product, and is conducive to increasing the selling price.

[0008] Solutions for solving problems

[0009] In order to solve the above technical problems, the present invention provides an amide crude oil stripping process, comprising the following steps:

[0010] (1) discharging the dealcoholized amide crude oil to a scouring kettle;

[0011] (2) introducing steam into the steam distillation kettle from the bottom of the steam distillation kettle to perform steam stripping, and collecting impurities separated during the steam stripping process into a receiving tank;

[0012] (3) After the stripping is completed, a decompression and heating dehydration operation is performed in the steamer, and the impurities separated during the dehydration process are collected in a receiving tank;

[0013] (4) Discharging the dehydrated amide crude oil to a finished product tank to obtain amide finished crude oil.

[0014] Preferably, in the stripping step, the steam pressure is controlled at 4-10 kgf / cm 2 , preferably 5-8kgf / cm 2 , more preferably 6-7kgf / cm 2 .

[0015] Preferably, the stripping time is 10-30 minutes, preferably 10-20 minutes, more preferably 15 minutes.

[0016] Preferably, during the dehydration operation, the pressure is reduced to -97 kPa and the temperature is controlled at 70-100°C.

[0017] Preferably, the temperature is controlled at 80-100°C, preferably 90°C.

[0018] Preferably, the amide crude oil is butachlor or acetochlor.

[0019] Preferably, the process further comprises: the impurities separated during the stripping process are condensed and then connected to the receiving tank to collect waste water.

[0020] Preferably, the process further comprises: distilling the wastewater in the receiving tank and incinerating the distillation residue.

[0021] Preferably, the process further comprises: sending the waste liquid after distillation to biochemical treatment.

[0022] Preferably, the process further comprises: detecting the amide content of the finished crude oil.

[0023] Preferably, the content of amides in the finished crude oil is above 96%.

[0024] The present invention also provides an amide crude oil stripping device, wherein the supply and flow path of the dealcoholized amide crude oil comprises a crude oil inlet (6), a scouring tank (2), a liquid phase outlet (8), and a finished product tank (3);

[0025] The bottom of the steam distillation kettle is connected to a steam inlet pipe (9), and the top is provided with a crude oil inlet (6) and a gas phase outlet (7), and the gas phase outlet (7) is connected to a receiving tank (4);

[0026] The steam inlet pipe (9) is controlled by a steam inlet valve (5);

[0027] The receiving tank (4) is used to receive the separated wastewater containing impurities;

[0028] The steaming kettle (2) is provided with a pressure reducing and heating device for performing a dehydration operation.

[0029] Preferably, the decompression and temperature raising device comprises a vacuum system and a temperature control system.

[0030] Preferably, the steaming kettle (2) is provided with a pressure gauge and a temperature gauge.

[0031] Preferably, the steam inlet pipe (9) is connected to a flow meter and a pressure gauge for monitoring the flow state of the steam.

[0032] Preferably, a condenser is provided between the distillation kettle (2) and the receiving tank (4).

[0033] Preferably, both the crude oil inlet (6) and the gas phase outlet (7) are provided with regulating valves.

[0034] Preferably, a pump is provided between the liquid phase outlet (8) and the finished product tank (3).

[0035] Preferably, the amide crude oil is butachlor or acetochlor.

[0036] Preferably, the device further comprises a distillation device for distilling the wastewater in the receiving tank (4).

[0037] Preferably, the device further comprises an incineration device for incinerating the distillation residue in the receiving tank (4).

[0038] Effects of the Invention

[0039] The present invention significantly improves the quality of amide crude oil, especially acetochlor crude oil and butachlor crude oil, by steam stripping, so that the content thereof is stabilized at more than 96%, thereby enhancing market competitiveness and being conducive to the increase of selling price. At the same time, the purification and dehydration steps are integrated in a single kettle, which not only saves energy, but also shortens the operation time, simplifies the production process, reduces the cost, improves the production efficiency, weakens the requirements for the front-end operation of amide crude oil, is more suitable for large-scale industrial production, and has a wide application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a process flow chart of amide crude oil stripping.

[0041] Description of reference numerals:

[0042] 1-dealcoholization kettle, 2-washing kettle, 3-finished product tank, 4-receiving tank, 5-steam inlet valve, 6-crude oil inlet, 7-gas phase outlet, 8-liquid phase outlet, 9-steam inlet pipe. DETAILED DESCRIPTION

[0043] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0044] The present invention provides an amide crude oil stripping process, comprising the following steps:

[0045] (1) discharging the dealcoholized amide crude oil to a scouring kettle;

[0046] (2) introducing steam into the steam distillation kettle from the bottom of the steam distillation kettle to perform steam stripping, and collecting impurities separated during the steam stripping process into a receiving tank;

[0047] (3) After the stripping is completed, a decompression and heating dehydration operation is performed in the steamer, and the impurities separated during the dehydration process are collected in a receiving tank;

[0048] (4) Discharging the dehydrated amide crude oil to a finished product tank to obtain amide finished crude oil.

[0049] In certain embodiments, during the stripping step, the steam pressure is controlled at 4-10 kgf / cm 2 .

[0050] In certain embodiments, during the stripping step, the steam pressure is controlled at 5-8 kgf / cm 2 .

[0051] In certain embodiments, during the stripping step, the steam pressure is controlled at 6-7 kgf / cm 2 .

[0052] In certain embodiments, the stripping time is 10-30 minutes.

[0053] In certain embodiments, the stripping time is 10-20 minutes.

[0054] In certain embodiments, the stripping time is 15 minutes.

[0055] In certain embodiments, during the dehydration operation, the pressure is reduced to -97 kPa and the temperature is controlled at 70-100°C.

[0056] In certain embodiments, the temperature is controlled at 80-100°C.

[0057] In certain embodiments, the temperature is controlled at 90°C.

[0058] In certain embodiments, the amide crude oil is butachlor or acetochlor.

[0059] In certain embodiments, the process further comprises: the impurities separated during the stripping process are condensed and then connected to the receiving tank to collect waste water.

[0060] In certain embodiments, the process further comprises: distilling the wastewater in the receiving tank and incinerating the distillation residue.

[0061] In certain embodiments, the process further comprises: sending the waste liquid after distillation to biochemical treatment.

[0062] In certain embodiments, the process further comprises: detecting the amide content of the finished crude oil.

[0063] In certain embodiments, the content of amides in the finished crude oil is above 96%.

[0064] The present invention also provides an amide crude oil stripping device, wherein the supply and flow path of the dealcoholized amide crude oil comprises a crude oil inlet (6), a scouring tank (2), a liquid phase outlet (8), and a finished product tank (3);

[0065] The bottom of the steam distillation kettle is connected to a steam inlet pipe (9), and the top is provided with a crude oil inlet (6) and a gas phase outlet (7), and the gas phase outlet (7) is connected to a receiving tank (4);

[0066] The steam inlet pipe (9) is controlled by a steam inlet valve (5);

[0067] The receiving tank (4) is used to receive the separated wastewater containing impurities;

[0068] The steaming kettle (2) is provided with a pressure reducing and heating device for performing a dehydration operation.

[0069] In certain embodiments, the decompression and temperature raising device comprises a vacuum system and a temperature control system.

[0070] In certain embodiments, the steaming kettle (2) is provided with a pressure gauge and a temperature gauge.

[0071] In certain embodiments, the steam inlet pipe (9) is connected to a flow meter and a pressure gauge for monitoring the flow state of the steam.

[0072] In certain embodiments, a condenser is provided between the distillation tank (2) and the receiving tank (4).

[0073] In certain embodiments, both the crude oil inlet (6) and the gas phase outlet (7) are provided with regulating valves.

[0074] In certain embodiments, a pump is further provided between the liquid phase outlet (8) and the finished product tank (3).

[0075] In certain embodiments, the amide crude oil is butachlor or acetochlor.

[0076] In certain embodiments, the apparatus further comprises a distillation device for distilling the wastewater in the receiving tank (4).

[0077] In certain embodiments, the apparatus further comprises an incineration device for incinerating the distillation residue in the receiving tank (4).

[0078] The method of the present invention is described below by means of specific examples. It should be understood that these examples are used to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited to the scope of the following examples; the implementation conditions adopted in the examples can be further adjusted according to specific requirements, and the implementation conditions not specified are usually the conditions in routine experiments.

[0079] Example 1

[0080] When producing butachlor, the material is directly discharged to the scouring kettle after the alcohol distillation is completed, and then the steam inlet valve is opened and the stripping is completed for 15 minutes. Then the subsequent dehydration treatment is carried out, the vacuum is pulled to -97kPa, the temperature is raised to 90℃, the dehydration is completed, and the material is discharged to the finished product tank. The crude oil content of the finished product is 96.1%, and the impurities stripped out enter the receiving tank.

[0081] Example 2

[0082] When producing acetochlor, the material is directly discharged to the scouring kettle after the alcohol distillation is completed, and then the steam inlet valve is opened and the stripping is completed for 15 minutes. Then the subsequent dehydration treatment is carried out, the vacuum is pulled to -97kPa, the temperature is raised to 90℃, the dehydration is completed, and the material is discharged to the finished product tank. The crude oil content of the finished product is 96.5%, and the impurities stripped out enter the receiving tank.

[0083] Example 3

[0084] When producing butachlor, the material is directly discharged to the scouring kettle after the alcohol distillation is completed, and then the steam inlet valve is opened and the stripping is completed for 15 minutes. Then the subsequent dehydration treatment is carried out, the vacuum is pulled to -97kPa, the temperature is raised to 90℃, the dehydration is completed, and the material is discharged to the finished product tank. The crude oil content of the finished product is 96.2%, and the impurities stripped out enter the receiving tank.

[0085] Example 4

[0086] When producing acetochlor, the material is directly discharged to the scouring kettle after the alcohol distillation is completed, and then the steam inlet valve is opened and the stripping is completed for 15 minutes. Then the subsequent dehydration treatment is carried out, the vacuum is pulled to -97kPa, the temperature is raised to 90℃, the dehydration is completed, and the material is discharged to the finished product tank. The crude oil content of the finished product is 96.6%, and the impurities stripped out enter the receiving tank.

[0087] Comparative Example 1

[0088] When producing butachlor, the alcohol is directly discharged into the crude product tank after distillation, and then filtered to obtain the product. The crude oil content of the finished product is 94.6%.

[0089] Comparative Example 2

[0090] When producing acetochlor, the alcohol is directly discharged into the crude product tank after distillation, and then filtered to obtain the product. The crude oil content of the finished product is 94.4%.

[0091] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present invention and do not limit the scope of protection of the patent of the present invention.

Claims

1. An amide crude oil stripping process, characterized in that: The following steps are involved: (1) discharging the dealcoholized amide crude oil to a scouring kettle; (2) introducing steam into the steam distillation kettle from the bottom of the steam distillation kettle to perform steam stripping, and collecting impurities separated during the steam stripping process into a receiving tank; (3) After the stripping is completed, a decompression and heating dehydration operation is performed in the steamer, and the impurities separated during the dehydration process are collected in a receiving tank; (4) Discharging the dehydrated amide crude oil to a finished product tank to obtain amide finished crude oil.

2. The process according to claim 1, characterized in that: In the stripping step, the steam pressure is controlled at 4-10 kgf / cm 2 , preferably 5-8kgf / cm 2 , more preferably 6-7kgf / cm 2 ; Preferably, the stripping time is 10-30 minutes, preferably 10-20 minutes, more preferably 15 minutes.

3. The process according to claim 1, characterized in that: During the dehydration operation, the pressure is reduced to -97 kPa and the temperature is controlled at 70-100°C; Preferably, the temperature is controlled at 80-100°C, preferably 90°C.

4. The process according to claim 1, characterized in that: The amide crude oil is butachlor or acetochlor.

5. The process according to claim 1, characterized in that: The process further comprises: the impurities separated in the stripping process are condensed and then connected to the receiving tank to collect waste water; Preferably, the process further comprises: distilling the wastewater in the receiving tank and incinerating the distillation residue; Preferably, the process further comprises: sending the distilled waste liquid to biochemical treatment; Preferably, the process further comprises: detecting the amide content of the finished crude oil.

6. A process as claimed in any one of claims 1 to 5, characterized in that: The content of the amide finished crude oil is above 96%.

7. An amide crude oil stripping device, characterized in that: The supply and flow path of the dealcoholized amide crude oil includes a crude oil inlet (6), a scouring tank (2), a liquid phase outlet (8), and a finished product tank (3); The bottom of the steam distillation kettle is connected to a steam inlet pipe (9), and the top is provided with a crude oil inlet (6) and a gas phase outlet (7), and the gas phase outlet (7) is connected to a receiving tank (4); The steam inlet pipe (9) is controlled by a steam inlet valve (5); The receiving tank (4) is used to receive the separated wastewater containing impurities; The steaming kettle (2) is provided with a pressure reducing and heating device for performing a dehydration operation.

8. The device according to claim 7, characterized in that: The decompression and temperature raising device comprises a vacuum system and a temperature control system; Preferably, the steaming kettle (2) is provided with a pressure gauge and a temperature gauge; Preferably, the steam inlet pipe (9) is connected to a flow meter and a pressure gauge for monitoring the flow state of the steam; Preferably, a condenser is provided between the distillation kettle (2) and the receiving tank (4); Preferably, both the crude oil inlet (6) and the gas phase outlet (7) are provided with regulating valves; Preferably, a pump is provided between the liquid phase outlet (8) and the finished product tank (3).

9. The device according to claim 7, characterized in that: The amide crude oil is butachlor or acetochlor.

10. The device according to any one of claims 7 to 9, characterized in that: The device also includes a distillation device for distilling the wastewater in the receiving tank (4); Preferably, it also includes an incineration device for incinerating the distillation residue in the receiving tank (4).

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