Reaction device for crude methyl ester production system

Abstract

The utility model discloses a reaction device for a crude methyl ester production system, which comprises a reactor and a pulse reciprocating pump, the reactor comprises a shell and a turbulent flow pipe group, the turbulent flow pipe group comprises tubes vertically arranged in the shell, and an upper connecting pipe and a lower connecting pipe which connect the tubes in series, the lower connecting pipe and the feeding connector of the turbulent flow pipe set are both located below the shell, and an emptying opening is formed in the bottom of the lower connecting pipe. According to the utility model, the inlet and the outlet of the pulse reciprocating pump are both connected with the feeding pipe, so that a mixture in the feeding pipe can be extracted, and the extracted mixture is pumped into the feeding pipe again, thereby not only providing power for the continuous flow of the mixture in the tube nest, but also promoting the mixing of the mixture; and the plurality of tubes in the shell enable the mixture to continuously flow in the tubes from bottom to top and from top to bottom, so that on the basis of promoting the mixing effect of the enzyme water phase and the oil phase, the reactor is small in size, and the equipment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of crude methyl ester production, in particular to a reaction device used in a crude methyl ester production system. Background Art

[0002] The main component of biodiesel is fatty acid methyl ester (FAM), which is obtained by mixing feedstock oil with methanol and then reacting it with an esterification catalyst. The physical and chemical properties of FAME are very similar to or even better than those of diesel, making it an ideal diesel alternative and capable of reducing diesel consumption to a certain extent. The traditional production process for crude methyl ester (methyl ester refers to "FAM") involves injecting the raw materials into a reactor and stirring the reaction for at least 30 hours. During this stirring process, methanol is added in batches, meaning the reactor is replenished with methanol at least twice. This results in long reaction times, low yields, high costs, and wasted time. To address this issue, the applicant has proposed a continuous FAME production system (CN216879368U) that uses lipase as a catalyst and utilizes liquid level differences to achieve continuous production. However, the reactors in existing production systems are mostly stirred tanks, resulting in poor mixing of the enzyme aqueous phase (containing methanol) and feedstock oil, which affects reaction efficiency and crude methyl ester yield. Furthermore, due to the large number of stirred tanks and the reliance on liquid level differences for overflow, the stirred tanks are large in diameter, occupying significant space and increasing equipment costs. Summary of the Invention

[0003] In view of this, the utility model proposes a reaction device for a crude methyl ester production system.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The reaction device for a crude methyl ester production system described in the present invention comprises a reactor and a pulse reciprocating pump arranged on one side of the reactor; the reactor comprises a vertically arranged shell and a turbulence tube group arranged in the shell, the turbulence tube group comprises a tube array arranged vertically in the shell and an upper connecting pipe and a lower connecting pipe connecting the tube array in series, the feed joints of the lower connecting pipe and the turbulence tube group are both located below the shell, and an emptying port is provided at the bottom of the lower connecting pipe; the discharge interface of the upper connecting pipe and the turbulence tube group are both located above the shell; the feed joint is connected to one end of the feed pipe through a flange, the feed pipe is provided with a feed port connected to a mixed material feeding pipeline, and the other end of the feed pipe has two flange ports, one of which is connected to the inlet of the pulse reciprocating pump, and the other is connected to the outlet of the pulse reciprocating pump;

[0006] A plurality of conical disks for promoting turbulence of the mixture are installed in each of the tubes through a connecting assembly. The conical disk is a hollow structure having a first port and a second port coaxial with the tubes. The diameter of the first port is smaller than the diameter of the second port. A turbulence plate coaxial with the first port is arranged in the conical disk near the first port. The aperture of the central hole of the turbulence plate is smaller than the aperture of the first port.

[0007] The beneficial effects are as follows: the utility model connects both the inlet and outlet of the pulse reciprocating pump to the feed pipe, allowing the mixed material in the feed pipe to be extracted and then pumped back into the feed pipe, not only providing power for the continuous flow of the mixed material within the tube array, but also promoting the mixing of the mixed material. The utility model installs multiple tube arrays within the shell, allowing the mixed material to flow continuously from bottom to top and from top to bottom within the tube arrays. On the basis of promoting the mixing effect of the enzyme water phase and oil phase, the reactor volume is reduced, reducing equipment costs.

[0008] Since each tube array is equipped with multiple hollow conical disks with openings at both ends, the mixture entering the tube array will further generate irregular turbulence under the action of the conical disks, promoting the full mixing of the enzyme aqueous phase and the raw oil in the mixture and improving the mixing effect.

[0009] Preferably, the connecting assembly includes a plurality of fixing rings welded at intervals inside the shell and a plurality of columns fixed on the fixing rings, and a plurality of the conical disks are welded at intervals on the columns.

[0010] Preferably, the installation directions of two adjacent conical disks in the tube array are opposite to each other, so as to further enhance the turbulence of the mixture, ensure the mixing effect, and improve the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 It is a schematic diagram of the reactor of the present invention.

[0013] Figure 3 It is the arrangement diagram of the tubes in the shell.

[0014] Figure 4 It is a schematic diagram of the interior of the tube column.

[0015] Figure 5 yes Figure 4 AA direction schematic diagram.

[0016] Figure 6 yes Figure 4 BB direction schematic diagram.

[0017] Figure 7 It is a structural diagram of a conical disk. DETAILED DESCRIPTION

[0018] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0019] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0020] In the description of this utility model, unless otherwise specified or limited, the terms "connected" and "connection" that may appear should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium, or it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood based on specific circumstances.

[0021] like Figure 1-7 As shown, the reaction device for the crude methyl ester production system described in the present invention includes a reactor and a pulse reciprocating pump P arranged outside the reactor. The reactor includes a vertically arranged shell 1 and a turbulence tube group arranged in the shell 1. Steel legs are provided on the ground, and the shell 1 is fixed on the steel legs. The turbulence tube group includes a plurality of vertically arranged tubes 2 in the shell 1 and an upper connecting pipe 3 and a lower connecting pipe 4 connecting the tubes 2 in series. The lower connecting pipe 4 and the feed joint of the turbulence tube group are both located below the shell 1. The bottom of the lower connecting pipe 4 is provided with an emptying port 5, which can be used when maintenance or production is stopped. 5 to empty the tubes 2; the upper connecting pipe 3 and the discharge interface 6 of the turbulent flow tube group are both located above the shell 1, and the top of the upper connecting pipe 3 is provided with an exhaust port K4. The discharge interface 6 is connected to the next reactor or the product tank through a pipeline; the upper connecting pipe 3 and the lower connecting pipe 4 of the utility model are both located outside the shell 1, which is convenient for installing the tubes 2 in series; the utility model adopts the bottom inlet and top outlet, and the tubes are seven, of course, it can also be five or more; the space between the shell 1 and the tubes forms a tube pass G, and steam or hot water can be introduced into the tube pass G to heat the mixed material in the tubes to meet the reaction requirements;

[0022] Each tube array 2 is equipped with a plurality of conical discs 7 through a connecting assembly to promote turbulent flow of the mixture. The conical discs 7 are hollow structures and have a first port a and a second port b coaxial with the tube array 2. The diameter of the first port a is smaller than the diameter of the second port b. A turbulence plate 8 coaxial with the first port a is provided within the conical disc 7 near the first port a. The central aperture of the turbulence plate 8 is smaller than the aperture of the first port a. During the reaction process, the unique structural design of the conical discs 7 enhances the turbulent flow intensity of the mixture, ensuring the mixing effect of the enzyme aqueous phase and oil phase in the mixture and promoting the reaction. The utility model installs multiple tubes 2 inside the shell, so that the mixture flows continuously from bottom to top and from top to bottom within the tubes 2. The compact structure and small shell diameter realize the small size of the equipment. In actual production, the equipment can be installed side by side on the ground without setting a height difference, reducing equipment cost and equipment installation cost.

[0023] Combine Figure 1 As can be seen, the reactor has a horizontally installed feed pipe 9, and a feed port K1 connected to the mixed material feeding pipeline is opened on the upper wall of the feed pipe 9, so that the mixed material enters the feed pipe 9. One end of the feed pipe 9 is fixedly connected to the feed joint of the turbulent flow pipe group through a flange;

[0024] The other end of the feed pipe 9 has two flange ports, one of which is connected to the inlet K2 of the pulse reciprocating pump P, and the other is connected to the outlet K3 of the pulse reciprocating pump P. The pulse reciprocating pump P is used to extract the mixture into the feed pipe 9, and then the pulse is used to pump it into the feed pipe 9, which not only promotes the turbulent flow of the mixture, but also provides power for the turbulent flow of the mixture in the tube array 2.

[0025] Combine Figure 4-6 As can be seen, the connection assembly includes a plurality of fixing rings 10 welded to the inside of the housing 1 at intervals and a plurality of columns 11 fixed to the fixing rings 10. The conical discs 7 are intermittently penetrated on the columns 10 to achieve the installation of the conical discs 7. The installation directions of two adjacent conical discs 7 are opposite to each other, which enhances the turbulence intensity of the mixture. Figure 4 .

[0026] The utility model changes the structure of the traditional reactor, adopts a pulse reciprocating pump P to provide power and promote turbulence, and adopts a combination of tubes and conical discs to further promote turbulence of the mixture, thereby ensuring the mixing effect of the mixture, promoting reaction, and improving reaction efficiency; the unique reactor design realizes a small diameter, occupies a small area, and does not require the setting of a liquid level difference, thereby reducing equipment cost and equipment installation cost.

[0027] Practice has shown that the use of the reactor of the present invention in a crude methyl ester production system can greatly reduce equipment costs, increase reaction rates, and thereby greatly reduce the production costs of crude methyl ester while maintaining production capacity.

[0028] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A reaction device for a crude methyl ester production system, comprising a reactor, characterized in that: The reactor further comprises a pulse reciprocating pump disposed outside the reactor; the reactor comprises a vertically disposed shell and a turbulence tube group disposed within the shell, the turbulence tube group comprising a tube array disposed vertically within the shell and an upper connecting tube and a lower connecting tube connecting the tube arrays in series, the feed joints of the lower connecting tube and the turbulence tube group being both located below the shell, and an emptying port being provided at the bottom of the lower connecting tube; the discharge ports of the upper connecting tube and the turbulence tube group being both located above the shell; The feed connector is connected to one end of the feed pipe through a flange. The feed pipe is provided with a feed port connected to the mixed material feeding pipeline. The other end of the feed pipe has two flange ports, one of which is connected to the inlet of the pulse reciprocating pump, and the other is connected to the outlet of the pulse reciprocating pump. A plurality of conical disks for promoting turbulence of the mixture are installed in each of the tubes through a connecting assembly. The conical disk is a hollow structure having a first port and a second port coaxial with the tubes. The diameter of the first port is smaller than the diameter of the second port. A turbulence plate coaxial with the first port is arranged in the conical disk near the first port. The aperture of the central hole of the turbulence plate is smaller than the aperture of the first port.

2. The reaction device for a crude methyl ester production system according to claim 1, characterized in that: The connection assembly includes a plurality of fixing rings welded at intervals inside the shell and a plurality of columns fixed on the fixing rings, and a plurality of conical disks are welded at intervals on the columns.

3. The reaction device for a crude methyl ester production system according to claim 1, wherein: The installation directions of two adjacent conical disks in the tube array are opposite.

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