Novel synthesis reactor heat recovery device
By setting up a casing mechanism with a double-layer casing structure inside the synthesis reactor, the circulating gas absorbs the reaction heat in the catalyst bed and gasifies diethylene glycol to participate in the reaction, solving the problem of catalyst temperature difference and poor reaction effect, and improving the two Glycerol yield and production stability.
Patent Information
- Application Number
- CN202420269561.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-04
AI Technical Summary
During the morpholine production process, the catalyst is locally overheated or low-temperature due to uneven gasification of diethylene glycol, resulting in more by-products, low yields, and reduced catalyst efficiency, affecting production quality.
A casing mechanism with an intake double-layer casing structure is arranged inside the synthesis reactor. The circulating gas exchanges heat in the casing mechanism and passes through the catalyst bed, absorbs the reaction heat, reduces the reaction temperature, and gasifies diglycerides by gasifying the diglycerides The alcohol enters the catalyst bed to participate in the reaction and stabilizes the reaction.
It effectively reduces the catalyst temperature difference, improves the yield of diethylene glycol, stabilizes the reaction process, and solves the problem of high-temperature cracking and low-temperature reaction effects of raw material diethylene glycol.
Smart Images
Figure CN222143868U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical reaction equipment, in particular to a novel heat recovery device for a synthesis reactor. Background Art
[0002] The synthesis reactor is a key equipment in the production process of morpholine. It is a device where diethylene glycol, ammonia and other raw materials react to produce the product morpholine. The raw materials enter the top of the synthesis reactor, and after gas distribution through the demister (gas redistributor), they enter the catalyst bed. The ammonia and diethylene glycol in the reaction mixture undergo amination and dehydration cyclization to produce morpholine, and some side reactions occur due to the cracking of diethylene glycol. The exothermic effect of the reaction causes the reaction gas to produce a temperature rise, which is generally controlled not to exceed 15°C. The reaction gas comes out from the bottom of the synthesis reactor and enters the subsequent heat exchange equipment for cooling and condensation to produce the product crude morpholine. In the production process of morpholine, due to the uneven distribution of the diethylene glycol gasifier, the raw material diethylene glycol is liquid or the reaction gas raw materials are unevenly mixed, resulting in local overheating or low temperature of the catalyst in the synthesis reactor. The decomposition of diethylene glycol in the overheating section leads to a large number of by-products, and the diethylene glycol reaction is incomplete in the low-temperature section, and the yield is still very low. As the reaction proceeds, coke is easily formed on the surface of the catalyst in the synthesis reactor and wrapped around the catalyst surface, which greatly reduces the catalytic efficiency of the catalyst, seriously affecting the progress of the synthesis reaction, thereby affecting the system production load and product quality.
[0003] Therefore, the existing synthesis reactor cannot eliminate the influence of high temperature cracking and poor low temperature reaction effect of the raw material diethylene glycol. Utility Model Content
[0004] 1. Technical issues to be solved
[0005] In view of the deficiencies of the prior art, the utility model provides a novel heat recovery device for a synthesis reactor, which solves the technical problem that the prior synthesis reactor cannot eliminate the influence of high-temperature cracking and poor low-temperature reaction effect of the raw material diethylene glycol.
[0006] (II) Technical solution
[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0008] The utility model solves the technical problem and provides a novel synthesis reactor heat recovery device, comprising a synthesis reactor; a circulating gas inlet is arranged at the top of the synthesis reactor; a circulating gas outlet is arranged at the bottom of the synthesis reactor; a sleeve mechanism is arranged inside the synthesis reactor; the sleeve mechanism comprises an inner tube and an outer tube; the top and the bottom of the inner tube are both opened; the top of the outer tube is open and the bottom is closed; the inner tube is located inside the outer tube and the top extends out of the top of the outer tube; the top opening of the inner tube is connected to the circulating gas inlet; a plurality of catalyst beds and a plurality of filler support assemblies are arranged inside the synthesis reactor; the catalyst bed is arranged on the filler support assembly and contacts the outer ring side of the outer tube.
[0009] Furthermore, the number of the catalyst beds is five; the number of the filler support assemblies is equal to the number of the catalyst beds.
[0010] Furthermore, six wire mesh demisters are arranged inside the synthesis reactor, five of which are respectively located below the five catalyst beds, and the other is located at the inner top of the synthesis reactor.
[0011] Furthermore, the packing support assembly includes a packing support plate; the packing support plate is fixed inside the synthesis reactor; and the catalyst bed is arranged on the packing support plate.
[0012] Furthermore, the filler support assembly also includes a pressing plate; the pressing plate is fixed inside the synthesis reactor and pressed on the top of the catalyst bed.
[0013] Furthermore, the filler support assembly also includes a stainless steel wire mesh; and two layers of stainless steel wire mesh are arranged on the filler support plate.
[0014] Furthermore, the mesh openings of the two layers of stainless steel wire mesh arranged on the filler support plate are 40 mesh and 20 mesh respectively from top to bottom.
[0015] Furthermore, the sleeve mechanism also includes a connecting block; the outer ring side surface of the inner tube is fixedly connected to the inner ring side surface of the outer tube through a plurality of connecting blocks.
[0016] Furthermore, the novel synthesis reactor heat recovery device also includes a casing supporting flat steel; the outer tube is fixed inside the synthesis reactor through the casing supporting flat steel.
[0017] Furthermore, the sleeve supporting flat steel is made of aluminum alloy.
[0018] (III) Beneficial effects
[0019] The utility model adds a casing mechanism with an air intake double-layer casing structure inside a synthesis reactor, so that the circulating gas continues to undergo heat exchange gas mixing in the casing mechanism of about 20 meters inside the synthesis reactor. At the same time, the circulating gas flows through the catalyst bed of the synthesis reactor, absorbs the reaction heat of the catalyst bed, effectively reduces the synthesis reaction temperature, and the liquid diethylene glycol in the reaction gas after absorbing part of the reaction heat is also gasified and enters the top of the catalyst bed of the synthesis reactor to participate in the reaction. By adding the casing mechanism, the reaction is more stable, the temperature difference of each section of the catalyst is significantly reduced, the diethylene glycol yield is significantly improved, and the production is stabilized, thereby solving the technical problem that the existing synthesis reactor cannot eliminate the influence of the poor high-temperature cracking and low-temperature reaction effects of the raw material diethylene glycol. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] 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.
[0021] Figure 1 This is a schematic diagram of the overall internal structure of a novel heat recovery device for a synthesis reactor in the utility model;
[0022] Figure 2 for Figure 1 A local enlarged view of point A in FIG.
[0023] Figure 3 for Figure 1 A local enlarged view of point B in FIG.
[0024] Figure 4 It is a flow diagram of the circulating gas in the heat recovery device of the novel synthesis reactor in the utility model;
[0025] Figure 5 for Figure 4 A local enlarged view of point C in FIG.
[0026] Figure 6 for Figure 4 A local enlarged view of D in FIG.
[0027] Figure 7 It is a heat diffusion flow diagram of the catalyst bed in the utility model in the heat recovery device of the novel synthesis reactor;
[0028] Figure 8 for Figure 7 A local enlarged view of point E in FIG.
[0029] Fig. 9 for Figure 7 A local enlarged view of F in FIG.
[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0031] 1-synthesis reactor, 2-circulating gas inlet, 3-circulating gas outlet, 4-sleeve mechanism, 5-catalyst bed, 6-packing support assembly, 7-wire mesh demister, 8-sleeve support flat steel, 9-circulating gas flow direction, 10-catalyst bed heat diffusion direction, 401-inner tube, 402-outer tube, 403-connecting block, 601-packing support plate, 602-pressing plate, 603-stainless steel wire mesh. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.
[0033] The embodiment of the present application provides a novel heat recovery device for a synthesis reactor, thereby solving the technical problem that the existing synthesis reactor cannot eliminate the influence of high-temperature cracking and low-temperature reaction effect of the raw material diethylene glycol.
[0034] like Figures 1 to 9 As shown,
[0035] The embodiment of the utility model provides a novel synthesis reactor heat recovery device, which comprises a synthesis reactor 1. The top of the synthesis reactor 1 is provided with a circulating gas inlet 2, and the bottom of the synthesis reactor 1 is provided with a circulating gas outlet 3.
[0036] A casing mechanism 4 is arranged inside the synthesis reactor 1. The casing mechanism 4 includes an inner tube 401 and an outer tube 402. The casing mechanism 4 is an air intake double-layer casing structure.
[0037] The inner tube 401 is a circular tube, and the top and bottom of the inner tube 401 are both opened. The outer tube 402 is a circular tube, and the top of the outer tube 402 is opened and the bottom is closed.
[0038] The inner tube 401 is located inside the outer tube 402 and the top thereof extends out of the top of the outer tube 402. The top opening of the inner tube 401 is connected to the circulating gas inlet 2. The circulating gas enters the inner tube 401 through the circulating gas inlet 2, then flows downward through the bottom of the inner tube 401 to the bottom of the outer tube 402, then flows upward through the top of the outer tube 402 to enter the interior of the synthesis reactor 1 to react with the catalyst, and finally flows out through the circulating gas outlet 3.
[0039] A plurality of catalyst beds 5 and a plurality of filler support assemblies 6 are arranged inside the synthesis reactor 1 . The catalyst beds 5 are arranged on the filler support assemblies 6 and are in contact with the outer ring side surface of the outer tube 402 .
[0040] Specifically, five catalyst beds 5 are provided, and five filler support assemblies 6 are provided, and the filler support assemblies 6 correspond to the catalyst beds 5 one by one.
[0041] Preferably, six wire mesh demisters 7 are arranged inside the synthesis reactor 1, five of which are respectively located below the five catalyst beds 5, and the other is located at the inner top of the synthesis reactor 1. The thickness of the wire mesh demister 7 is not less than 250 mm, and the main function of the wire mesh demister 7 is to separate the droplets entrained by the gas in the synthesis reactor 1 to ensure the mass transfer efficiency, reduce the loss of valuable materials and improve the operation of the circulation compressor after the synthesis system.
[0042] Specifically, the packing support assembly 6 includes a packing support plate 601 . The packing support plate 601 is in a grid type. The packing support plate 601 is fixed inside the synthesis reactor 1 , and the catalyst bed 5 is arranged on the packing support plate 601 .
[0043] Specifically, the packing support assembly 6 further includes a pressing plate 602 , which is fixed inside the synthesis reactor 1 and pressed on the top of the catalyst bed 5 , thereby firmly fixing the catalyst on the packing support plate 601 .
[0044] Preferably, the filler support assembly 6 further includes a stainless steel wire mesh 603 , and two layers of stainless steel wire mesh 603 are arranged on the filler support plate 601 .
[0045] Specifically, the meshes of the two layers of stainless steel wire mesh 603 disposed on the filler support plate 601 are 40 mesh and 20 mesh respectively from top to bottom, and the aperture of the mesh of the stainless steel wire mesh 603 is not greater than 1.5 mm to prevent the catalyst from falling.
[0046] Specifically, the sleeve mechanism 4 further includes a connecting block 403 , and the outer ring side surface of the inner tube 401 is fixedly connected to the inner ring side surface of the outer tube 402 via a plurality of connecting blocks 403 .
[0047] Specifically, the novel synthesis reactor heat recovery device further includes a casing support flat steel 8 , and the outer tube 402 is fixed inside the synthesis reactor 1 through the casing support flat steel 8 .
[0048] Preferably, the casing support flat steel 8 is made of aluminum alloy, and the casing support flat steel 8 functions to firmly fix the internal casing in the cylinder of the synthesis reactor.
[0049] The working principle of the embodiment of the utility model:
[0050] A casing mechanism 4 having an air intake double-layer casing structure is added inside the synthesis reactor 1, and the circulating gas enters the inner tube 401 through the circulating gas inlet 2, so that the circulating gas continues to exchange heat in the casing mechanism 4 which is about 20 meters long inside the synthesis reactor to achieve the purpose of heating and mixing the circulating gas. At the same time, the circulating gas flows through the catalyst bed 5 in the synthesis reactor 1 and participates in the reaction. After passing through the five catalyst beds 5 in the synthesis reactor 1, the temperature gradually rises. At this time, the circulating gas in the casing mechanism 4 absorbs the reaction heat of the catalyst bed 5, effectively reducing the temperature inside the synthesis reactor 1, and its own temperature will also reach the temperature required by the process.
[0051] In summary, compared with the prior art, the embodiments of the present invention have the following beneficial effects:
[0052] The utility model adds a casing mechanism 4 with an air intake double-layer casing structure inside the synthesis reactor 1, so that the circulating gas continues to undergo heat exchange gas mixing in the casing mechanism 4 which is about 20 meters long inside the synthesis reactor 1. At the same time, the circulating gas flows through the catalyst bed 5 of the synthesis reactor 1, absorbs the reaction heat of the catalyst bed 5, effectively reduces the synthesis reaction temperature, and the liquid diethylene glycol in the reaction gas after absorbing part of the reaction heat is also gasified and enters the top of the catalyst bed 5 of the synthesis reactor 1 to participate in the reaction. By adding the casing mechanism 4, the reaction is more stable, the temperature difference of each section of the catalyst is significantly reduced, the diethylene glycol yield is significantly improved, and the production is stabilized, thereby solving the technical problem that the existing synthesis reactor cannot eliminate the influence of the poor high-temperature cracking and low-temperature reaction effects of the raw material diethylene glycol.
[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A novel synthesis reactor heat recovery device, comprising a synthesis reactor (1); characterized in that: The top of the synthesis reactor (1) is provided with a circulating gas inlet (2); the bottom of the synthesis reactor (1) is provided with a circulating gas outlet (3); The synthesis reactor (1) is provided with a sleeve mechanism (4) inside; The sleeve mechanism (4) comprises an inner tube (401) and an outer tube (402); The top and bottom of the inner tube (401) are both open; the top of the outer tube (402) is open and the bottom is closed; The inner tube (401) is located inside the outer tube (402) and the top thereof extends out of the top of the outer tube (402); The top opening of the inner tube (401) is connected to the circulating gas inlet (2); The synthesis reactor (1) is provided with a plurality of catalyst beds (5) and a plurality of filler support assemblies (6); The catalyst bed (5) is arranged on a packing support assembly (6) and is in contact with the outer ring side surface of the outer tube (402).
2. The novel synthesis reactor heat recovery device according to claim 1, characterized in that: The catalyst bed layers (5) are provided with five; the number of the filler support assemblies (6) is equal to the number of the catalyst bed layers (5).
3. The novel synthesis reactor heat recovery device according to claim 2, characterized in that: Six wire mesh demisters (7) are arranged inside the synthesis reactor (1), five of which are respectively located below the five catalyst beds (5), and the other is located at the inner top of the synthesis reactor (1).
4. The novel synthesis reactor heat recovery device according to claim 2, characterized in that: The packing support assembly (6) comprises a packing support plate (601); the packing support plate (601) is fixed inside the synthesis reactor (1); and the catalyst bed (5) is arranged on the packing support plate (601).
5. The novel synthesis reactor heat recovery device according to claim 4, characterized in that: The packing support assembly (6) further comprises a pressing plate (602); the pressing plate (602) is fixed inside the synthesis reactor (1) and is pressed on the top of the catalyst bed (5).
6. The novel synthesis reactor heat recovery device according to claim 4, characterized in that: The filler support assembly (6) further comprises a stainless steel wire mesh (603); and two layers of stainless steel wire mesh (603) are arranged on the filler support plate (601).
7. The novel synthesis reactor heat recovery device according to claim 6, characterized in that: The mesh openings of the two layers of stainless steel wire mesh (603) arranged on the filler support plate (601) are 40 mesh and 20 mesh respectively from top to bottom.
8. The novel synthesis reactor heat recovery device according to claim 1, characterized in that: The sleeve mechanism (4) further comprises a connecting block (403); the outer ring side surface of the inner tube (401) is fixedly connected to the inner ring side surface of the outer tube (402) via a plurality of connecting blocks (403).
9. The novel synthesis reactor heat recovery device according to claim 1, characterized in that: The novel synthesis reactor heat recovery device further comprises a casing support flat steel (8); the outer tube (402) is fixed inside the synthesis reactor (1) via the casing support flat steel (8).
10. The novel synthesis reactor heat recovery device according to claim 9, characterized in that: The sleeve supporting flat steel (8) is made of aluminum alloy.