Alkylation reactor capable of fully mixing

Abstract

The utility model provides an alkylation reactor capable of fully mixing, which comprises a reactor shell, and a plurality of groups of reaction cavities communicated with one another are arranged in the reactor shell; an air supply assembly used for providing air flow into the reaction cavities and enabling reactants in the reaction cavities to be fully mixed is arranged between the reaction cavities, the air supply assembly comprises an air inlet inner pipe and an air inlet main pipe, the air inlet inner pipe rotates in the air inlet main pipe in a penetrating mode, and the outer wall of the air inlet inner pipe is attached to the inner wall of the air inlet main pipe; a first air hole and a second air hole which correspond to each other are formed in the same horizontal position in the inner air inlet pipe and the main air inlet pipe respectively, a reaction cavity air inlet hole is formed in the connecting position of the reaction cavity and the main air inlet pipe and communicates with the first air hole and the second air hole, and a shell cover is arranged at the top of the reaction cavity; a transmission assembly used for controlling the air inlet inner pipe to rotate is arranged on the upper surface of the shell cover and used for switching the working position and the non-working position of the first air hole and the second air hole.

Description

Technical Field

[0001] The utility model relates to the technical field of oil refining, in particular to an alkylation reactor with sufficient mixing. Background Art

[0002] The reaction in the alkylation reactor of the petrochemical industry is carried out under the action of a catalyst, which is divided into two forms: solid and liquid. The liquid catalyst is usually an acidic ionic liquid. From the study of the reaction mechanism, it is known that for the alkylation reaction process using a liquid catalyst, the reaction is mainly completed at the interface between the liquid catalyst and the hydrocarbon reaction raw material, and the interface renewal rate and the ratio of alkanes to alkenes near the interface (alkane-olefin ratio) are the key factors affecting the selectivity of the main reaction. In order to achieve higher selectivity of alkylated products, the alkylation reaction requires strong liquid-liquid mixing and a higher reaction alkane-olefin ratio.

[0003] A mixing-reaction element, a mixing-reaction module and an alkylation reactor are provided in the publication number "CN207342708U". The mixing-reaction element and the mixing-reaction module disclosed in the present invention have a first opening and a second opening arranged opposite to each other. Two streams of reaction materials entering the mixing-reaction element can enter the reaction zone in the second liquid channel through the first opening and the second opening in a "counter-jet" manner to carry out a mixing reaction. The reaction materials can be fully mixed and contacted in the mixing-reaction element, and the mixing and reaction efficiency is high; the mixing-reaction element and the mixing-reaction module are used in the alkylation reactor to effectively promote the mixing reaction of the liquid catalyst and the reaction feed, and improve the selectivity and product quality of the alkylation reaction; by arranging multiple mixing-reaction elements or multi-stage mixing-reaction modules in the alkylation reactor, the alkane-olefin ratio can be optimized, the reaction efficiency can be improved, and the reactor investment and floor space can be reduced.

[0004] However, the above device still has the following problems during implementation:

[0005] Although two opposing openings are provided to utilize the counteraction of two groups of liquids for mixing reaction, counteraction is only produced at the moment of mutual fusion during convection, and it is impossible to provide mixing force for the reactants again during the reaction process, and it is impossible to ensure the adequacy of mixing. Utility Model Content

[0006] The utility model aims to provide an alkylation reactor with sufficient mixing to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A fully mixed alkylation reactor comprises a reactor shell, wherein a plurality of groups of mutually connected reaction chambers are arranged in the reactor shell;

[0009] An air supply component for providing airflow into the reaction chambers so as to fully mix the reactants in the reaction chambers is arranged between the reaction chambers. The air supply component includes an inner air intake tube and an inner air intake tube. The inner air intake tube passes through and rotates in the inner air intake tube, and the outer wall of the inner air intake tube and the inner wall of the inner air intake tube are arranged in close contact with each other. The inner air intake tube and the inner air intake tube are respectively provided with corresponding first and second air holes at the same horizontal position. A reaction chamber air intake hole is provided at the connection position between the reaction chamber and the air intake tube, and the reaction chamber air intake hole and the first and second air holes are all connected.

[0010] Preferably, a shell cover is provided on the top of the reaction chamber, and a transmission assembly for controlling the rotation of the inner air intake pipe is provided on the upper surface of the shell cover, and the transmission assembly is used to switch the working and non-working positions of the first air hole and the second air hole.

[0011] Preferably, the transmission assembly comprises a gear and a rack meshing with each other, a guide bar is fixedly mounted on the upper surface of the housing cover, and the rack is slidably mounted in the guide bar.

[0012] Preferably, an airbag is fixedly mounted on the upper surface of the shell cover, a push rod is provided at one end outside the airbag, and the push rod is fixedly connected to the rack at one end away from the airbag.

[0013] Preferably, one end of the rack is fixedly connected to a guide rod, one end of the guide bar is fixedly installed with a limit plate, one end of the guide rod is slidably installed in the limit plate, and a spring is connected between the limit plate and the rack.

[0014] Preferably, an air pump is provided outside the reaction chamber, an air outlet pipe of the air pump is connected to an air cavity, the air cavity and the air inlet inner tube are connected through a catheter, and the air cavity and the airbag are connected through an airbag connecting tube.

[0015] Preferably, a feed pipe with a valve is provided between the reaction chambers, and a feed pipe is also provided at the bottom of the reaction chamber at the bottom layer.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. In the utility model, a plurality of groups of interconnected reaction chambers are arranged in the reactor shell, and an air intake pipe is connected between the reaction chambers. An external air pump is used to supply air to the plurality of reaction chambers through the air intake pipe, so that the reactants in the reaction chambers are impacted by air flow, thereby increasing the degree of mixing of the reactants.

[0018] 2. In the utility model, a rotatable air intake inner tube is arranged in the air intake main tube, and a transmission component is arranged on the top of the reaction chamber to drive the air intake inner tube to rotate, so as to control the opening and closing of the connecting air holes. It not only realizes the air supply, but also effectively prevents the overflow of the reaction, controls the production cost without waste, ensures the smooth flow of the air intake inner tube and the air intake main tube, and ensures the air supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the internal structure of the main housing of the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the reaction chamber of the utility model;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the air intake inner pipe and the air intake main pipe of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the transmission component of the utility model;

[0023] Figure 5 For the utility model Figure 1 A schematic diagram of the enlarged structure of part A.

[0024] In the figure: 1. reactor shell; 2. reaction chamber; 3. feed pipe; 4. air cavity; 5. conduit; 6. air bag connecting pipe; 7. air inlet inner pipe; 8. first air hole; 9. air inlet main pipe; 10. second air hole; 11. reaction chamber air inlet hole; 12. ejector rod; 13. air bag; 14. guide strip; 15. rack; 16. gear; 17. guide rod; 18. spring; 19. limit plate; 20. shell cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] A fully mixed alkylation reactor comprises a reactor shell 1, wherein a plurality of groups of mutually connected reaction chambers 2 are arranged in the reactor shell 1, and a feed pipe 3 with a valve is arranged between the reaction chambers 2, and a feed pipe 3 is also arranged at the bottom of the reaction chamber 2 at the bottom layer;

[0028] In this embodiment, a plurality of groups of interconnected reaction chambers 2 are arranged in the reactor shell 1, and the reactants are mixed by utilizing a partitioning structure. In a certain space, the reactants are prevented from stacking on each other and the defects of a small contact surface are avoided. The reaction chambers 2 are interconnected. After a certain reaction time, the valve in the discharge pipe 3 is opened, so that all the reaction products can be discharged from the reactor shell 1 in sequence through the discharge pipe 3 to complete the reaction.

[0029] Specifically, the alkylation reactor provided by the present application is a device that uses the above structure to carry out alkylation reactions on organic molecules. It is mainly used in organic synthesis to change the properties of organic substances. The working principle of the alkylation reactor is that saturated hydrocarbons (such as alkanes) undergo a combination of dealkylation and alkylation reactions under the action of a catalyst to produce a series of organic compounds, thereby changing the properties of organic substances.

[0030] An air supply assembly for providing airflow into the reaction chamber 2 is arranged between the reaction chambers 2 so that the reactants in the reaction chamber 2 are fully mixed. The air supply assembly includes an inner air intake tube 7 and an air intake main tube 9. The inner air intake tube 7 penetrates and rotates in the air intake main tube 9, and the outer wall of the inner air intake tube 7 and the inner wall of the air intake main tube 9 are arranged in a close fit. The inner air intake tube 7 and the air intake main tube 9 are respectively provided with corresponding first air holes 8 and second air holes 10 at the same horizontal position. A reaction chamber air intake hole 11 is provided at the connection position between the reaction chamber 2 and the air intake main tube 9, and the reaction chamber air intake hole 11 and the first air holes 8 and the second air holes 10 are all connected.

[0031] An air intake main pipe 9 is connected between the reaction chambers 2, and second air holes 10 are equidistantly provided in an annular manner in the air intake main pipe 9. A reaction chamber air intake hole 11 is provided at the connection position between the inner wall of the reaction chamber 2 and the air intake main pipe 9, and the second air holes 10 and the reaction chamber air intake hole 11 are communicated at the same horizontal position.

[0032] It should be noted that the external pump body is used to continuously supply gas into the gas inlet main pipe 9 and pass it into the reaction chamber 2, so that the reactants in the reaction chamber 2 are fully mixed under the action of the gas flow.

[0033] Embodiment 2:

[0034] Based on Example 1:

[0035] The external air pump supplies gas to the reaction chamber 2 , but the air holes are connected, and the reactants in the reaction chamber 2 will enter the air inlet main pipe 9 , and the reactant raw materials will remain in the air inlet main pipe 9 , which not only leads to waste of raw materials, but also affects the effect of the air inlet main pipe 9 on the gas supply to the reaction chamber 2 .

[0036] A shell cover 20 is arranged on the top of the reaction chamber 2. A transmission assembly for controlling the rotation of the air intake inner tube 7 is arranged on the upper surface of the shell cover 20. The transmission assembly is used to switch the working position and the non-working position of the first air hole 8 and the second air hole 10.

[0037] In this embodiment, an inner air intake tube 7 is arranged in the air intake main pipe 9, and the inner air intake tube 7 and the air intake main pipe 9 are arranged in close contact to ensure that the gap is minimized to prevent the reactants in the reaction chamber 2 from entering. At the same time, the inner air intake tube 7 can rotate in the air intake main pipe 9. Since the first air hole 8 is opened in the inner air intake tube 7, the rotation of the inner air intake tube 7 can be utilized to enable the first air hole 8 and the second air hole 10 to switch between a penetration state or a non-penetration state to realize the opening or closing of the air holes. When air is taken in, the first air hole 8, the second air hole 10 and the reaction chamber air intake hole 11 are connected. When the air is closed, the first air hole 8 and the second air hole 10 return to the non-penetration state to prevent the reactants from overflowing.

[0038] Specifically, the transmission assembly includes a gear 16 and a rack 15 meshing with each other, a guide bar 14 is fixedly mounted on the upper surface of the housing cover 20, and the rack 15 is slidably mounted in the guide bar 14. An airbag 13 is fixedly mounted on the upper surface of the housing cover 20, and a push rod 12 is arranged at one end outside the airbag 13, and the push rod 12 is fixedly connected to the rack 15 at one end away from the airbag 13.

[0039] It should be noted that, in the present embodiment, an airbag 13 is provided on the outside of the reactor shell 1, and a push rod 12 slidably connected inside the airbag 13 is used to push the rack 15 to slide inside the guide bar 14. During the sliding process of the rack 15, a gear 16 provided on the top of the air intake inner tube 7 is moved. The rotation of the gear 16 can drive the air intake inner tube 7 to rotate a certain angle, so that the first air hole 8 and the second air hole 10 are connected through and through, and the gas from the external air pump can enter the reaction chamber 2 to impact the reactants in the reaction chamber 2, so that the reactants in the reaction chamber 2 are fully mixed.

[0040] An air pump is arranged outside the reaction chamber 2, and the air outlet pipe of the air pump is connected with the air chamber 4, the air chamber 4 is connected with the air inlet inner pipe 7 through the guide tube 5, and the air chamber 4 is connected with the air bag 13 through the air bag connecting pipe 6. A guide rod 17 is fixedly connected to one end of the rack 15, a limit plate 19 is fixedly installed at one end of the guide bar 14, one end of the guide rod 17 is slidably installed in the limit plate 19, and a spring 18 is connected between the limit plate 19 and the rack 15.

[0041] In this embodiment, the air cavity 4 is used to connect the external air pump, the air intake inner tube 7 and the air bag 13, so that the air supply is realized, that is, the air holes at the connecting positions of the air intake inner tube 7, the air intake main tube 9 and the reaction chamber 2 are opened. The air pump stops, and the spring 18 at one end of the rack 15 acts to drive the rack 15 to reset, and the air intake inner tube 7 is reversed, so that the first air hole 8 and the second air hole 10 are misaligned, thereby realizing the closure of the second air hole 10, effectively preventing the reactant from overflowing.

[0042] Working principle: During the use of the device, the reactant raw materials of the substitution reaction are firstly put into the reaction chamber 2 by using the external feeding pipeline, and then the external pump body is started. After the external pump body works, the gas is respectively sent into the air intake inner tube 7 and the air bag 13 through the air cavity 4. The gas enters the air bag 13, so that the air bag 13 extends, and the air bag 13 pushes the push rod 12 to produce displacement, thereby pushing the rack 15 to slide in the guide bar 14. During the sliding process, since the gear 16 and the rack 15 are meshed, the rack 15 drives the gear 16 to rotate, thereby driving the air intake inner tube 7 to rotate a certain angle in the air intake main pipe 9, so that the first air hole 8 and the second air hole 10 are connected through, and the gas of the external air pump can enter the reaction chamber 2 to impact the reactants in the reaction chamber 2, so that the reactants in the reaction chamber 2 are fully mixed;

[0043] After the air is supplied for a period of time, the second period of time is determined by a technician in this field after multiple implementations to determine the best reaction time. The external air pump stops working. At this time, the elastic force of the spring 18 drives the rack 15 to reset. During the reset process, the air intake inner tube 7 is reversed, so that the first air hole 8 and the second air hole 10 are misaligned, thereby closing the second air hole 10 and effectively preventing the reactant from overflowing.

[0044] At this time, the valve in the discharge pipe 3 is opened to allow the fully mixed reaction products in the reaction chamber 2 to be discharged from the reactor, and then pass through the reactor, chemical agent, cooler, filter and control system, etc., to finally obtain the desired product.

[0045] It should be noted that the reactor shell 1 for the alkylation reaction and the production process after the reactor shell 1 is discharged are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. The power supply, specific composition and principles thereof are clear to those skilled in the art, so they will not be described in detail.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A well-mixed alkylation reactor, comprising a reactor housing (1), characterized in that: A plurality of groups of mutually connected reaction chambers (2) are arranged in the reactor shell (1); An air supply component for providing an air flow into the reaction chamber (2) is arranged between the reaction chambers (2) so that the reactants in the reaction chamber (2) are fully mixed. The air supply component comprises an air intake inner tube (7) and an air intake main tube (9). The air intake inner tube (7) penetrates and rotates in the air intake main tube (9), and the outer wall of the air intake inner tube (7) and the inner wall of the air intake main tube (9) are arranged in close contact with each other. The air intake inner tube (7) and the air intake main tube (9) are respectively provided with corresponding first air holes (8) and second air holes (10) at the same horizontal position. A reaction chamber air intake hole (11) is provided at the connection position between the reaction chamber (2) and the air intake main tube (9), and the reaction chamber air intake hole (11) and the first air holes (8) and the second air holes (10) are all arranged in communication with each other.

2. A well-mixed alkylation reactor according to claim 1, characterized in that: A shell cover (20) is arranged on the top of the reaction chamber (2), and a transmission assembly for controlling the rotation of the air intake inner tube (7) is arranged on the upper surface of the shell cover (20), and the transmission assembly is used to switch the working position and non-working position of the first air hole (8) and the second air hole (10).

3. A well-mixed alkylation reactor according to claim 2, characterized in that: The transmission assembly comprises a gear (16) and a rack (15) meshing with each other, a guide bar (14) is fixedly mounted on the upper surface of the housing cover (20), and the rack (15) is slidably mounted in the guide bar (14).

4. A well-mixed alkylation reactor according to claim 3, characterized in that: An airbag (13) is fixedly mounted on the upper surface of the housing cover (20), a push rod (12) is arranged at one end outside the airbag (13), and an end of the push rod (12) away from the airbag (13) is fixedly connected to a rack (15).

5. A well-mixed alkylation reactor according to claim 4, characterized in that: One end of the rack (15) is fixedly connected to a guide rod (17), one end of the guide bar (14) is fixedly installed with a limit plate (19), one end of the guide rod (17) is slidably installed in the limit plate (19), and a spring (18) is connected between the limit plate (19) and the rack (15).

6. A well-mixed alkylation reactor according to claim 5, characterized in that: An air pump is arranged outside the reaction chamber (2); an air outlet pipe of the air pump is connected to an air chamber (4); the air chamber (4) and an inner air inlet pipe (7) are connected via a conduit (5); and the air chamber (4) and an air bag (13) are connected via an air bag connecting pipe (6).

7. A well-mixed alkylation reactor according to claim 1, characterized in that: A feed pipe (3) with a valve is provided between the reaction chambers (2), and a feed pipe (3) is also provided at the bottom of the reaction chamber (2) at the bottom layer.

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