Novel GBL reactor

Abstract

The utility model discloses a novel GBL reactor, which comprises a reactor body, an upper ellipsoidal head and a lower ellipsoidal head, the upper ellipsoidal head is welded at the top of the reactor body, the lower ellipsoidal head is welded at the bottom of the reactor body, a gas-phase feed port is arranged at the center of the top of the upper ellipsoidal head, and a gas-phase feed port is arranged at the bottom of the reactor body. A catalyst bin is arranged in the lower elliptical head, a catalyst discharge port is formed in the side wall of the catalyst bin, and a silk screen is arranged at the top of the catalyst bin; and an upper tube plate is arranged on the inner wall of the upper end of the reactor body. According to the utility model, the defects in the prior art are overcome, the design is reasonable, a gas mixture is firstly in full contact with a catalyst in the catalyst tube nest and then is further subjected to catalytic dehydrogenation through the catalyst filled in the catalyst bin, so that the product quality is improved, and the device has higher social use value and application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a novel GBL reactor. Background Art

[0002] γ-Butyrolactone (GBL), also known as 4-hydroxybutyric acid lactone, is a colorless liquid with an acetone-like odor. Its molecular weight is 86.09 g / mol and its boiling point is 204°C. γ-Butyrolactone has many excellent properties. It has a high boiling point, strong solubility, good reaction performance, good stability, high conductivity, safe use, miscible with water, and soluble in methanol, ethanol, acetone, ether and benzene.

[0003] Since γ-butyrolactone was synthesized, it has been widely used in various fields. It can dissolve various organic and inorganic compounds and is often used as an organic solvent, extractant and absorbent; it can undergo a series of ring-opening and ring-substitution chemical reactions and can prepare a variety of important downstream products, such as cyprofloxacin, a third-generation quinolone antibiotic, and cyprofloxacin, which can also be used as an important raw material for drugs such as cefotaxime, aminobutyric acid, and vitamin B1; it has stable electrolytic properties and solubility, so it can become a special solvent with high conductivity and is used as an electrolyte for lithium batteries and electrical appliances.

[0004] At present, in my country, γ-butyrolactone is mainly used to produce pyrrolidone, and a small part is used to produce pharmaceutical intermediates, electrolyte solutions and solvents, and pesticides. With the rapid development of the domestic fine synthesis industry and the pharmaceutical industry, the demand for γ-butyrolactone continues to rise. Therefore, in recent years, as an important fine chemical product, the production process of γ-butyrolactone has become a hot topic of research and has received more and more attention. At present, the main production methods of γ-butyrolactone are maleic anhydride hydrogenation method and 1,4-butanediol dehydrogenation method, of which the latter is more widely used.

[0005] The production of γ-butyrolactone by 1,4-butanediol dehydrogenation requires a dehydrogenation reactor. The dehydrogenation reactor is usually a vertical cylindrical structure with spherical heads installed at both ends. The upper spherical head is provided with an air inlet, and the lower spherical head is provided with an air outlet. Tube sheets are installed at the upper and lower ends of the dehydrogenation reactor. Multiple heat exchange tubes are installed between the two tube sheets, and the heat exchange tubes are filled with catalysts. There are usually two ways to set the position of the air inlet, one is to set it on the side of the spherical head, and the other is to set it on the top of the spherical head. When it is set on the side of the spherical head, it is difficult to ensure that the gas material enters each heat exchange tube evenly, thus affecting the quality of the product. In addition, the existing reactor only has an inlet and an outlet for the heat transfer oil, and the heat exchange efficiency is low, thus affecting the overall quality of the product.

[0006] Therefore, in view of this, the inventor, based on his rich experience in design, development and actual production in the relevant industry for many years, has studied and improved the existing structure and defects, and provided a new GBL reactor in order to achieve a more practical purpose. Utility Model Content

[0007] In order to solve the problems mentioned in the above background technology, the utility model provides a new GBL reactor.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A novel GBL reactor comprises a reactor body, an upper elliptical head and a lower elliptical head, wherein the upper elliptical head is welded to the top of the reactor body, the lower elliptical head is welded to the bottom of the reactor body, a gas phase feed port is provided at the center of the top of the upper elliptical head, a catalyst bin is provided in the lower elliptical head, a catalyst discharge port is provided on the side wall of the catalyst bin, and a wire mesh is provided on the top of the catalyst bin;

[0010] An upper tube plate is provided on the inner wall of the upper end of the reactor body, and a lower tube plate is provided on the inner wall of the lower end of the reactor body. A plurality of groups of catalyst tubes are provided between the upper tube plate and the lower tube plate, and the catalyst tubes are vertically connected between the upper tube plate and the lower tube plate.

[0011] A heat exchange chamber is formed between the upper tube plate and the lower tube plate, a main inlet for heat transfer oil is provided on the lower end wall of the heat exchange chamber, a main outlet for heat transfer oil is provided on the upper end wall, annular baffles and baffles are alternately arranged from top to bottom in the heat exchange chamber, the baffles are supported by distance tubes fixed on the upper tube plate, the annular baffles are supported by pull rods fixed on the upper tube plate, the diameter of the baffles is smaller than the diameter of the annular baffles, and a heat transfer oil hole with a diameter smaller than that of the baffles is provided at the center of the annular baffles.

[0012] Preferably, a plurality of groups of first short truncation plates are equidistantly distributed on the upper end surface of the baffle, and a plurality of groups of first long truncation plates are equidistantly distributed on the lower end surface, and the lengths of the first short truncation plates and the first long truncation plates are both less than the spacing between the baffle and the annular baffle.

[0013] Preferably, a plurality of groups of second short truncation plates are equidistantly distributed on the upper end surface of the annular baffle, and a plurality of groups of second long truncation plates are equidistantly distributed on the lower end surface, and the lengths of the second short truncation plates and the second long truncation plates are both less than the spacing between the baffle and the annular baffle.

[0014] Preferably, a pressure plate is provided on the inner wall of the reactor body and below the lower tube plate, a thermometer mounting jacket is vertically provided in the reactor body, the thermometer mounting jacket is fixed to the upper end of the pressure plate, and a thermometer is provided on the top of the upper elliptical head through the thermometer mounting jacket.

[0015] Preferably, a gas collector is provided in the lower elliptical head, and the top of the gas collector is a filter screen with an upwardly protruding structure.

[0016] Preferably, a gas phase discharge port is connected to the bottom of the lower elliptical head and is located below the gas collector.

[0017] Preferably, a remote thermometer mounting clamp is provided on the inner wall of the lower end of the reactor body, and a remote thermometer is mounted on the outwardly extending end of the remote thermometer mounting clamp.

[0018] Preferably, manholes are respectively provided on the upper and lower side walls of the reactor body.

[0019] Preferably, the catalyst tubes and catalyst bins are filled with catalyst-inert alumina balls respectively.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The present application can fully disperse the heat transfer oil by setting up baffles and annular baffles, and short baffles and long baffles are alternately arranged between the baffles and the annular baffles, forcing the heat transfer oil to be baffled multiple times along a specified distance to enhance the heat exchange efficiency.

[0022] 2. The present application provides a catalyst chamber in the lower elliptical head and fills the catalyst chamber with inert alumina balls, so as to continue to catalyze the dehydrogenation of the remaining 1,4-butanediol in the mixed gas phase to generate γ-butyrolactone. The produced γ-butyrolactone is filtered and impurities are removed by the filter screen at the top of the gas collector and then discharged to the gas phase outlet.

[0023] In summary, the utility model overcomes the shortcomings of the prior art and has a reasonable design. The gas mixture is first fully contacted with the catalyst in the catalyst tubes, and then further catalytically dehydrogenated by the catalyst filled in the catalyst bin, thereby improving product quality and having high social use value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2This is a schematic diagram of the structure of the upper elliptical head of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the lower elliptical head of the utility model;

[0028] Figure 4 It is a top view of the utility model;

[0029] Figure 5 It is a cross-sectional schematic diagram of the heat exchange chamber of the utility model;

[0030] Figure 6 It is a top view of the annular baffle of the utility model;

[0031] Figure 7 It is a schematic diagram of the installation structure of the baffle and the annular baffle of the utility model.

[0032] In the figure: reactor body 1, upper elliptical head 2, lower elliptical head 3, gas phase feed port 4, manhole 5, catalyst tube 6, baffle 7, first short interception plate 71, first long interception plate 72, annular baffle 8, heat transfer oil hole 81, second short interception plate 82, second long interception plate 83, pull rod 9, distance pipe 10, thermometer mounting jacket 11, heat transfer oil total inlet 12, heat transfer oil total outlet 13, thermometer 14, upper tube sheet 15, lower tube sheet 16, pressure plate 17, catalyst bin 18, catalyst discharge port 19, wire mesh 20, gas collector 21, gas phase discharge port 22, remote thermometer mounting clamp 23, remote thermometer 24. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0034] Example

[0035] Reference Figure 1-7A novel GBL reactor comprises a reactor body 1, an upper elliptical head 2 and a lower elliptical head 3, wherein the upper elliptical head 2 is welded to the top of the reactor body 1, and the lower elliptical head 3 is welded to the bottom of the reactor body 1. A gas phase feed port 4 is provided at the top center of the upper elliptical head 2, and a tube-type gas phase distributor is installed in the gas phase feed port 4, which can buffer the incoming gas material to prevent it from blowing away the catalyst in the catalyst tube 6. On the other hand, the tube-type gas phase distributor evenly distributes the incoming gas material so that it evenly enters the catalyst tube 6, thereby ensuring the effectiveness of the reaction and the quality of the product.

[0036] A catalyst bin 18 is provided in the lower elliptical head 3, a catalyst discharge port 19 is provided on the side wall of the catalyst bin 18, and a wire mesh 20 is provided on the top of the catalyst bin 18; the pore size of the wire mesh 20 is smaller than the particle size of the catalyst, which can not only play a blocking and supporting role, but also have a certain filtering effect, and can reduce the formation of foam in the reaction material;

[0037] An upper tube sheet 15 is provided on the inner wall of the upper end of the reactor body 1, and a lower tube sheet 16 is provided on the inner wall of the lower end of the reactor body 1. A plurality of groups of catalyst tubes 6 are provided between the upper tube sheet 15 and the lower tube sheet 16, and the catalyst tubes 6 are vertically connected between the upper tube sheet 13 and the lower tube sheet 14.

[0038] A heat exchange chamber is formed between the upper tube plate 15 and the lower tube plate 16. A heat transfer oil main inlet 12 is provided on the lower end wall of the heat exchange chamber, and a heat transfer oil main outlet 13 is provided on the upper end wall. Annular baffles 8 and baffles 7 are alternately arranged from top to bottom in the heat exchange chamber. The baffle 7 is supported by a spacing tube 10 fixed on the upper tube plate 15, and the annular baffle 8 is supported by a pull rod 9 fixed on the upper tube plate 15. The diameter of the baffle 7 is smaller than that of the annular baffle 8, and a heat transfer oil hole 81 with a diameter smaller than that of the baffle 7 is provided at the center of the annular baffle 8.

[0039] The upper end surface of the baffle plate 7 is provided with a plurality of groups of first short baffle plates 71 distributed at equal distances, and the lower end surface is provided with a plurality of groups of first long baffle plates 72 distributed at equal distances. The lengths of the first short baffle plates 71 and the first long baffle plates 72 are both less than the distance between the baffle plate 7 and the annular baffle plate 8.

[0040] The upper end surface of the annular baffle plate 8 is provided with a plurality of groups of second short throttle plates 82 at equal distances, and the lower end surface is provided with a plurality of groups of second long throttle plates 83 at equal distances. The lengths of the second short throttle plates 82 and the second long throttle plates 83 are both less than the distance between the baffle plate 7 and the annular baffle plate 8.

[0041] 1,4-butanediol gas and hydrogen are simultaneously fed into the reactor through the gas phase feed port 4. The mixed gas is first buffered and evenly distributed by the gas phase distributor in the gas phase feed port 4, and then enters the catalyst tube 6 below for catalytic dehydrogenation. The heat transfer oil enters the heat exchange chamber through the heat transfer oil main inlet 12, and successively passes through the second long intercepting plate 83 distributed at the upper end of the annular baffle 8 to enter the heat transfer oil hole 81. The heat transfer oil then flows to both sides of the baffle 7 between the staggered first long intercepting plate 72 and the second short intercepting plate 82, thereby forcing the heat transfer oil to be baffled multiple times according to the specified distance to enhance the heat exchange efficiency.

[0042] A pressure plate 17 is provided on the inner wall of the reactor body 1 and below the lower tube plate 16. A thermometer mounting jacket 11 is vertically provided in the reactor body 1. The thermometer mounting jacket 11 is fixed to the upper end of the pressure plate 17, and the thermometer mounting jacket 11 passes through the top of the upper elliptical head 2 and a thermometer 14 is provided.

[0043] The lower elliptical head 3 is provided with a gas collector 21, and the top of the gas collector 21 is a filter screen with an upwardly protruding structure; the bottom of the lower elliptical head 3 and below the gas collector 21 is connected with a gas phase discharge port 22. The catalyst array tubes 6 and the catalyst bin 18 are respectively filled with catalyst inert alumina balls, and the catalyst bin is filled with inert alumina balls, which can continue to catalyze the dehydrogenation of the remaining 1,4-butanediol in the mixed gas phase to generate γ-butyrolactone. The produced γ-butyrolactone is filtered and impurities are removed by the filter screen at the top of the gas collector 21 and then discharged to the gas phase discharge port.

[0044] A remote thermometer mounting clamp 23 is provided on the inner wall of the lower end of the reactor body 1, and a remote thermometer 24 is installed on the outwardly extending end of the remote thermometer mounting clamp 23; manholes 5 are respectively provided on the upper and lower end side walls of the reactor body 1 to facilitate subsequent maintenance and repair.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel GBL reactor, comprising a reactor body (1), an upper elliptical head (2) and a lower elliptical head (3), wherein the upper elliptical head (2) is welded to the top of the reactor body (1), and the lower elliptical head (3) is welded to the bottom of the reactor body (1), characterized in that: A gas phase feed port (4) is provided at the top center of the upper elliptical seal head (2), a catalyst bin (18) is provided in the lower elliptical seal head (3), a catalyst discharge port (19) is provided on the side wall of the catalyst bin (18), and a wire mesh (20) is provided on the top of the catalyst bin (18); An upper tube plate (15) is provided on the inner wall of the upper end of the reactor body (1), and a lower tube plate (16) is provided on the inner wall of the lower end of the reactor body (1). A plurality of groups of catalyst tubes (6) are provided between the upper tube plate (15) and the lower tube plate (16), and the catalyst tubes (6) are vertically connected between the upper tube plate (15) and the lower tube plate (16); A heat exchange chamber is formed between the upper tube plate (15) and the lower tube plate (16), the lower end wall of the heat exchange chamber is provided with a heat transfer oil main inlet (12), the upper end wall is provided with a heat transfer oil main outlet (13), annular baffles (8) and baffles (7) are arranged alternately from top to bottom in the heat exchange chamber, the baffles (7) are supported by a spacing tube (10) fixed to the upper tube plate (15), the annular baffles (8) are supported by a pull rod (9) fixed to the upper tube plate (15), the diameter of the baffles (7) is smaller than the diameter of the annular baffles (8), and a heat transfer oil hole (81) with a diameter smaller than that of the baffles (7) is provided at the center of the annular baffles (8).

2. A novel GBL reactor according to claim 1, characterized in that: The upper end surface of the baffle (7) is provided with a plurality of groups of first short baffles (71) at equal distances, and the lower end surface is provided with a plurality of groups of first long baffles (72) at equal distances, wherein the lengths of the first short baffles (71) and the first long baffles (72) are both less than the distance between the baffle (7) and the annular baffle (8).

3. A novel GBL reactor according to claim 1, characterized in that: The upper end surface of the annular baffle (8) is provided with a plurality of groups of second short tamper plates (82) at equal distances, and the lower end surface is provided with a plurality of groups of second long tamper plates (83) at equal distances, wherein the lengths of the second short tamper plates (82) and the second long tamper plates (83) are both less than the distance between the baffle (7) and the annular baffle (8).

4. A novel GBL reactor according to claim 1, characterized in that: A pressure plate (17) is provided on the inner wall of the reactor body (1) and below the lower tube plate (16); a thermometer mounting jacket (11) is vertically provided in the reactor body (1); the thermometer mounting jacket (11) is fixed to the upper end of the pressure plate (17); and a thermometer (14) is provided on the top of the thermometer mounting jacket (11) penetrating the upper elliptical head (2).

5. A novel GBL reactor according to claim 1, characterized in that: A gas collector (21) is arranged inside the lower elliptical head (3), and the top of the gas collector (21) is a filter screen with an upwardly protruding structure.

6. A novel GBL reactor according to claim 5, characterized in that: The bottom of the lower elliptical head (3) and located below the gas collector (21) is connected to a gas phase discharge port (22).

7. A novel GBL reactor according to claim 1, characterized in that: The inner wall at the lower end of the reactor body (1) is provided with a remote thermometer mounting clamping plate (23), and a remote thermometer (24) is mounted on the outwardly extending end of the remote thermometer mounting clamping plate (23).

8. A novel GBL reactor according to claim 1, characterized in that: Manholes (5) are respectively provided on the upper and lower side walls of the reactor body (1).

9. A novel GBL reactor according to claim 1, characterized in that: The catalyst tube array (6) and the catalyst bin (18) are respectively filled with catalyst inert alumina balls.

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