CN217103745U - Device and system for preparing esterified wax by Fischer-Tropsch wax one-step method - Google Patents
Device and system for preparing esterified wax by Fischer-Tropsch wax one-step method Download PDFInfo
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- CN217103745U CN217103745U CN202221087109.XU CN202221087109U CN217103745U CN 217103745 U CN217103745 U CN 217103745U CN 202221087109 U CN202221087109 U CN 202221087109U CN 217103745 U CN217103745 U CN 217103745U
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Abstract
The application provides a device and a system for preparing esterified wax by a Fischer-Tropsch wax one-step method. The device includes: the reaction kettle is provided with a first feeding hole, a second feeding hole, an oxygen inlet for inputting oxygen, a discharge hole for outputting a product and an air outlet for circularly recovering materials; a Fischer-Tropsch wax preheater for heating Fischer-Tropsch wax; the esterification material preheater is used for heating the esterification material; the condensation separator is provided with a circulating air inlet, a circulating air outlet and a circulating discharge hole; the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the first feed port, the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the second feed port, the circulating air inlet is communicated with the air outlet, the circulating air outlet is communicated with the oxygen air inlet, and the circulating discharge port is communicated with the Fischer-Tropsch wax preheater. The device for preparing the esterified wax by the Fischer-Tropsch wax one-step method is simple in structure, convenient and efficient, good in mass transfer and mixing effects, and capable of realizing continuous production of the esterified wax.
Description
Technical Field
The application relates to the field of chemical equipment, in particular to a device and a system for preparing esterified wax by a Fischer-Tropsch wax one-step method.
Background
Fischer-tropsch wax is a wax produced in an indirect coal liquefaction process and has a number of excellent properties. The yield of the Fischer-Tropsch wax in China is rapidly increased, but most Fischer-Tropsch wax is primary products and is limited in application. The special wax product is prepared by modifying the Fischer-Tropsch wax, so that the application field can be widened, and the additional value is improved.
The Fischer-Tropsch wax is used as a raw material, and the esterified wax is prepared by oxidation-esterification double modification, so that the esterified wax can be used for replacing expensive carnauba wax, and has a great additional value. However, most of the existing modification processes are two-step processes, and the method has the disadvantages of intermittent production, unstable product quality and low reaction efficiency. The process for preparing the esterified wax by one-step modification can shorten the reaction time and realize continuous production, and has great significance for the large-scale production of the synthetic esterified wax.
The technology for preparing the esterified wax by the Fischer-Tropsch wax one-step method usually adopts a secondary feeding mode to avoid the adverse effect of long esterification reaction time on products and ensure the quality of the esterified wax products. However, most of the existing wax modification reaction kettles are intermittent, the requirements of secondary feeding and continuous production of the process cannot be met, and further improvement is needed in the aspects of mass transfer and mixing, so that a device for preparing the esterified wax by the Fischer-Tropsch wax one-step method needs to be developed, continuous production is realized, and production efficiency is improved.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a device and a system for preparing esterified wax by a Fischer-Tropsch wax one-step method, so as to solve the problems.
In order to achieve the purpose, the following technical scheme is adopted in the application:
an apparatus for preparing esterified wax by a Fischer-Tropsch wax one-step method comprises:
the reaction kettle is provided with a first feeding hole, a second feeding hole, an oxygen inlet for inputting oxygen, a discharge hole for outputting a product and an air outlet for circularly recovering materials;
a Fischer-Tropsch wax preheater for heating Fischer-Tropsch wax;
the esterification material preheater is used for heating the esterification material;
the condensation separator is provided with a circulating air inlet, a circulating air outlet and a circulating discharge hole;
the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the first feed inlet, the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the second feed inlet, the circulating air inlet is communicated with the air outlet, the circulating air outlet is communicated with the oxygen air inlet, and the circulating discharge outlet is communicated with the Fischer-Tropsch wax preheater.
Preferably, a stirrer is arranged in the reaction kettle.
Preferably, an oxygen distribution plate for dispersing oxygen is arranged below the inner part of the reaction kettle.
Preferably, the discharge port is arranged at the lower part of one side of the reaction kettle and is positioned between the oxygen distribution plate and the stirrer in the height direction.
Preferably, a first feeding pump is arranged between the Fischer-Tropsch wax preheater and the first feeding hole.
Preferably, a second feeding pump is arranged between the esterification material preheater and the second feeding hole.
Preferably, the first feed inlet and the second feed inlet are both arranged at the top of the reaction kettle.
Preferably, the oxygen inlet comprises a fresh oxygen inlet and a recycled oxygen inlet, the recycled oxygen inlet being in communication with the recycled gas outlet.
Preferably, the reaction vessel is provided with a jacket.
A system for preparing esterified wax by a Fischer-Tropsch wax one-step method comprises a device for preparing the esterified wax by the Fischer-Tropsch wax one-step method.
Compared with the prior art, the beneficial effect of this application includes:
according to the device for preparing the esterified wax by the Fischer-Tropsch wax one-step method, the continuous production of the esterified wax is realized by configuring the reaction kettle, the Fischer-Tropsch wax preheater, the esterified material preheater and the condensation separator; the device has simple structure, convenience and high efficiency; the esterification material preheater is arranged, so that the esterification material high carbon alcohol and the catalyst are preheated, the temperature difference between the esterification material high carbon alcohol and the materials in the reaction kettle is reduced during feeding, the problem of blockage of the catalyst in a container and a pipeline can be effectively avoided, and continuous production is realized on the industrial application level; the condensation separator can effectively recycle oxygen and partial materials carried by the oxygen, realizes material recycling, and is favorable for maintaining the overall operation stability of the device.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments are briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.
FIG. 1 is a schematic diagram of an apparatus for the one-step preparation of an esterified wax from Fischer-Tropsch wax as provided by the example;
FIG. 2 is a photograph comparing an esterified wax made using the apparatus provided herein with an esterified wax made by a two-step process.
Reference numerals:
1-a reaction kettle; 2-a fischer-tropsch wax preheater; 3-esterification material preheater; 4-a condensation separator; 5-a first feed port; 6-a second feed port; 7-oxygen inlet; 8-a discharge hole; 9-air outlet; 10-cycle air intake; 11-circulating gas outlet; 12-circular discharge hole; 13-a stirrer; 14-a jacket; 15-a first feed pump; 16-a second feed pump; 17-an oxygen distribution plate; and 18-communicating pipe.
Detailed Description
Embodiments of the present application will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
Example 1
As shown in fig. 1, this example provides an apparatus for preparing esterified wax from fischer-tropsch wax by one-step method, which includes a reaction kettle 1, a fischer-tropsch wax preheater 2, an esterification material preheater 3, and a condensation separator 4.
The reaction kettle 1 is provided with a first feed port 5, a second feed port 6, an oxygen inlet 7 for inputting oxygen, a discharge port 8 for outputting a product and a gas outlet 9 for circularly recovering materials; the condensation separator 4 is provided with a circulating air inlet 10, a circulating air outlet 11 and a circulating discharge hole 12; the Fischer-Tropsch wax preheater 2 is communicated with the reaction kettle 1 through the first feed port 5, the Fischer-Tropsch wax preheater 2 is communicated with the reaction kettle 1 through the second feed port 6, the circulating air inlet 10 is communicated with the air outlet 9, the circulating air outlet 11 is communicated with the oxygen air inlet 7, and the circulating discharge port 12 is communicated with the Fischer-Tropsch wax preheater 2.
First feed inlet 5 and second feed inlet 6 all set up at reation kettle 1's top, and discharge gate 8 sets up the one side lower part at reation kettle 1.
In an alternative embodiment, in order to improve the mixing uniformity of the materials and ensure the smooth proceeding of the reaction, a stirrer 13 is provided in the reaction kettle 1.
Example 2
On the basis of example 1, in order to ensure the system temperature required in the reaction process, in a preferred embodiment, a jacket 14 is arranged outside the reaction kettle 1, and circulating water or heat conducting oil for providing or taking away heat is introduced into the jacket 14.
In order to facilitate the transportation of the material, in a preferred embodiment, a first feed pump 15 is arranged between the fischer-tropsch wax preheater 2 and the first feed inlet 5, and a second feed pump 16 is arranged between the esterification material preheater 3 and the second feed inlet 6.
Example 3
In addition to example 2, in order to further improve the uniformity of distribution of oxygen in the reaction vessel 1 and promote efficient progress of the reaction, an oxygen distribution plate 17 for distributing oxygen is provided inside the reaction vessel 1. The oxygen distribution plate 17 is preferably made of ceramic materials, is integrally disc-shaped, is communicated with the oxygen inlet 7, and changes oxygen into fine bubbles through uniformly distributed small holes formed in the oxygen distribution plate and distributes the fine bubbles to the whole interface, so that the oxygen is distributed to the whole accommodating space of the reaction kettle 1.
The stirrer 13 is provided with a plurality of blades which are matched with the oxygen distribution plate 17 to promote gas-liquid mass transfer and material mixing in the transverse and longitudinal directions of the reaction kettle 1.
For the sake of convenience of discharge, in a preferred embodiment, the discharge port 8 is located between the oxygen distribution plate 17 and the stirrer 13 in the height direction of the reaction tank 1.
The height direction of the reaction vessel 1 means the vertical direction in which the reaction vessel 1 is upright; "between the oxygen distribution plate 17 and the agitator 13" refers to a position between the bottom (the end away from the driving part thereof) of the agitator 13 to the oxygen distribution plate 17.
It is noted that the oxygen inlet 2 is provided with two branches, one for feeding fresh oxygen and the other for receiving recycled oxygen from the condensation separator 4.
In order to ensure smooth feeding of the second feeding hole 6, a communicating pipe 18 is arranged on the side wall of the second feeding hole 6 and communicated with the reaction kettle 1.
The use method of the device is briefly described as follows:
raw materials of Fischer-Tropsch wax and an oxidation initiator are heated in a Fischer-Tropsch wax preheater 2 until the raw materials are melted, the raw materials enter a reaction kettle 1 through a first feeding port 5 by a first feeding pump 15, a stirrer 13 is started, an oxygen valve on an oxygen inlet 7 is started, oxygen enters the reaction kettle 1 through the oxygen inlet 7, then the oxygen is dispersed into fine and uniform bubbles through an oxygen distribution plate 17, the bubbles are contacted with wax liquid, and the mass transfer efficiency of the Fischer-Tropsch wax oxidation reaction is effectively improved under the combined action of the stirrer 13. Meanwhile, the esterification reagent high carbon alcohol is heated to be molten in the esterification material preheater 3, the catalyst is put into and mixed together, after the oxidation reaction in the reaction kettle 1 is carried out for a certain time, a valve on a communication pipeline between the second feeding hole 6 and the esterification material preheater 3 is opened, the esterification material in the esterification material preheater 3 is conveyed into the reaction kettle 1 through the second feeding hole 6 by the second feeding pump 16, and the reaction is continued. After the reaction is finished, a valve of a discharge port 8 for discharging wax liquid is opened, esterified wax liquid flows out through the discharge port 8, a valve of an air outlet 9 at the top of the reaction kettle 1 is opened simultaneously, oxygen and partial materials carried by the oxygen enter a condensation separator 4 through the air outlet 9, the partial gas and liquid are connected to an oxygen inlet 7 through a circulating air outlet 11 and the valve and an oxygen inlet pipeline after passing through the separator 4, the wax liquid enters a Fischer-Tropsch wax preheater 2 through a circulating discharge port 12 and the valve, and the wax liquid enters the reaction kettle 1 again after being mixed to start the next reaction, so that continuous production is realized.
According to the above using method, 3% of stearic acid (the percentage of the stearic acid to the mass of the raw wax, the same applies hereinafter) as an initiator is mixed in the raw wax in the embodiment, 22.5% of the higher alcohol as the esterification reagent and 0.2% of the catalyst are added in the second feeding (i.e. the feeding through the second feeding hole 6), the total reaction time is 6 hours, and the time of the second feeding is 3 hours after the oxidation starts.
The specific indexes are compared as follows:
TABLE 1 esterified wax Properties to Properties
The product esterified wax prepared by the device provided by the application has good color, low acid value and high ester value, and each property is superior to that of the product prepared by the two-step method, as shown in figure 2 (a is the esterified wax prepared by the application, and b is the esterified wax prepared by the two-step method). Meanwhile, the production time and the equipment cost are also saved.
The application also provides a system for preparing the esterified wax from the Fischer-Tropsch wax by a one-step method, which comprises the device and also comprises necessary valves, pipelines and other accessory facilities.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. An apparatus for preparing esterified wax by a Fischer-Tropsch wax one-step method is characterized by comprising:
the reaction kettle is provided with a first feeding hole, a second feeding hole, an oxygen inlet for inputting oxygen, a discharge hole for outputting a product and an air outlet for circularly recovering materials;
a Fischer-Tropsch wax preheater for heating Fischer-Tropsch wax;
the esterification material preheater is used for heating the esterification material;
the condensation separator is provided with a circulating air inlet, a circulating air outlet and a circulating discharge hole;
the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the first feed inlet, the Fischer-Tropsch wax preheater is communicated with the reaction kettle through the second feed inlet, the circulating air inlet is communicated with the air outlet, the circulating air outlet is communicated with the oxygen air inlet, and the circulating discharge outlet is communicated with the Fischer-Tropsch wax preheater.
2. The apparatus of claim 1, wherein a stirrer is disposed within the reaction vessel.
3. The apparatus of claim 2, wherein an oxygen distribution plate for distributing oxygen is arranged below the inside of the reaction kettle.
4. The apparatus of claim 3, wherein the outlet is disposed at a lower portion of one side of the reaction vessel and is located between the oxygen distribution plate and the stirrer in a height direction.
5. The apparatus of claim 1, wherein a first feed pump is disposed between the Fischer-Tropsch wax preheater and the first feed inlet.
6. The apparatus of claim 1, wherein a second feed pump is disposed between the esterification feed preheater and the second feed inlet.
7. The apparatus of claim 1, wherein the first feed port and the second feed port are both disposed at a top of the reaction vessel.
8. The apparatus of claim 1, wherein the oxygen inlet comprises a fresh oxygen inlet and a recycled oxygen inlet, the recycled oxygen inlet being in communication with the recycled gas outlet.
9. The apparatus according to any one of claims 1 to 8, wherein the reaction vessel is provided with a jacket.
10. A system for preparing esterified wax by a fischer-tropsch wax one-step method, which is characterized by comprising a device for preparing esterified wax by the fischer-tropsch wax one-step method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221087109.XU CN217103745U (en) | 2022-05-07 | 2022-05-07 | Device and system for preparing esterified wax by Fischer-Tropsch wax one-step method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221087109.XU CN217103745U (en) | 2022-05-07 | 2022-05-07 | Device and system for preparing esterified wax by Fischer-Tropsch wax one-step method |
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| Publication Number | Publication Date |
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| CN217103745U true CN217103745U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221087109.XU Active CN217103745U (en) | 2022-05-07 | 2022-05-07 | Device and system for preparing esterified wax by Fischer-Tropsch wax one-step method |
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| CN (1) | CN217103745U (en) |
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- 2022-05-07 CN CN202221087109.XU patent/CN217103745U/en active Active
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