Reaction device for continuous alcohol ketone condensation reaction

Abstract

The invention discloses a reaction device continuously used for alcohol ketone condensation reaction, and relates to the technical field of chemical engineering, the reaction device comprises a reaction kettle main body and a reaction kettle cover hermetically connected with the reaction kettle main body, and also comprises a discharging assembly used for guiding out materials after reaction at the bottom of the reaction kettle main body; the discharging assembly comprises a discharging groove which is formed in the reaction kettle cover, and a discharging pipe with one end extending to the bottom of the reaction kettle main body is in internal threaded connection with the discharging groove; through mutual cooperation of the feeding assembly, the discharging assembly, the filtering assembly and the like, during production, a high-pressure conveying pump is controlled to be started, meanwhile, a throttling valve is controlled to be opened by a preset opening degree, an electric control three-way valve is controlled to enable the throttling valve to be communicated with a first feeding channel, and mixed raw materials are continuously injected into the reaction kettle main body; and the reaction product continuously produces materials with equal molar weight, and the quality in the reaction kettle is kept unchanged, so that continuous production is realized, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical industry, and particularly relates to a reaction device continuously used for alcohol-ketone condensation reaction. Background Art

[0002] Ketones can be used as excellent organic solvents and important organic chemical raw materials in the synthesis of spices, organic synthesis, and the synthesis of pharmaceutical intermediates. In the prior art, the synthesis methods of ketones are limited, and the reaction process is generally cumbersome and has many by-products. For example, ketones can be prepared by oxidative dehydrogenation of the corresponding alcohol, or by condensation of ketones and aldehydes and then hydrogenation, but these methods have high production costs and generally low product selectivity.

[0003] Chinese patent publication number CN105037120B discloses a method for synthesizing methyl heptanone in one pot by using isovaleraldehyde and acetone as raw materials, under the catalysis of triethylamine and palladium carbon, where the palladium carbon is solid, through an aldol condensation reaction and a hydrogenation reaction. This method requires repeated introduction of nitrogen into the air in the replacement device before the reaction, and also requires additional introduction of hydrogen.

[0004] The above process route usually adopts intermittent production in a closed reactor, which has a long reaction time, cumbersome operation, intermittent output of products, low efficiency, and many side reactions occur in the reactor, resulting in low product yield.

[0005] Therefore, it is necessary to invent a reaction device continuously used for alcohol-ketone condensation reaction to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a reaction device continuously used for alcohol-ketone condensation reaction to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a reaction device for continuous alcohol-ketone condensation reaction, comprising a reactor body and a reactor cover sealedly connected to the reactor body, and further comprising: A discharge assembly, which is used to discharge the reacted materials at the bottom of the reactor body; The discharge assembly includes a discharge trough, which is opened in the reactor cover and has an internal thread connected to a discharge pipe with one end extending to the bottom of the reactor body; A separation sleeve, which is placed on the top of the discharge pipe, with its bottom end extending into the discharge pipe and being slidably connected to the discharge pipe; A filtering mechanism is placed inside the reactor cover; The filtering mechanism comprises a filtering groove and a guide groove which are arranged on the top of the discharge groove and are opened sequentially from bottom to top; the filtering groove is connected with the discharge groove, one end of the guide groove is connected with the filtering groove, and the other end extends to the side wall of the reactor cover; A conical filter screen is placed at one end of the flow guide groove that is connected to the filter groove; A reset component is placed between the top wall of the filter tank and the separation sleeve and is used to push the separation sleeve to reset; The feed assembly is placed in the reactor cover and is used to add materials to the reactor body. It can push the separation sleeve upward to separate the filter tank into two chambers, so that the inner chamber of the separation sleeve can be discharged. At the same time, the feed assembly flushes the outer chamber of the separation sleeve to allow the filtered solid catalyst to flow back into the reactor body.

[0008] Preferably, the feed assembly comprises a first feed channel, which is opened in the reactor cover, one end of which is connected to the interior of the reactor body, and the other end of which extends to the side wall of the reactor cover; A second feed channel is provided in the reactor cover, one end of which is connected to the filter tank and the other end of which extends to the side wall of the reactor cover; An electrically controlled three-way valve, wherein a first interface thereof is connected to a first feed channel via a conduit and a first feed pipe, a second interface thereof is connected to a second feed channel via a conduit and a second feed pipe, and a third interface thereof is connected to a raw material mixing tank via a conduit, a throttle valve and a high-pressure delivery pump in sequence; An electric telescopic rod, the telescopic end of which penetrates and extends into the second feed pipe, and can push the separation sleeve to move upward and fit the conical filter screen, so that the filter tank is divided into two chambers; A reflux groove is connected to the first feed channel. When the separation sleeve moves up and fits with the conical filter screen, the separation sleeve releases the blockage of the reflux groove, so that the catalyst can reflux to the first feed channel; The guide piece is placed in the middle of the telescopic end of the electric telescopic rod and is used to guide the incoming liquid to the top of the filter tank.

[0009] Preferably, the separation sleeve comprises a conical portion that matches the conical filter screen; a partition portion disposed at the bottom of the conical portion; The flat plate sealing part is arranged on the side wall of the partition part, and is used to seal the reflux groove when the partition sleeve is located at the bottom; and release the sealing of the reflux groove when the partition sleeve is located at the top.

[0010] Preferably, the filter tank includes a blocking section that cooperates with the flat plate blocking portion; The blockage release section has a diameter greater than that of the blockage section.

[0011] Preferably, it also includes a stirring mechanism, which is placed inside the reactor body and is used to stir the materials inside the reactor body; The stirring mechanism comprises a stirring motor, an output shaft of the stirring motor extends into the interior of the reactor body, and a stirring blade is arranged at the end of the output shaft of the stirring motor.

[0012] Preferably, the reactor further comprises a meter, which is placed at the bottom of the reactor body.

[0013] Preferably, it also includes an air inlet valve and a safety valve, both of which are placed on the side wall of the reactor cover and connected to the inside of the reactor body. When the pressure in the reactor body exceeds a predetermined value, the safety valve opens.

[0014] Preferably, the reactor further comprises a temperature monitoring system, wherein the temperature monitoring system comprises a temperature sensor penetrating the reactor cover and inserted into the reactor body.

[0015] Preferably, the discharge assembly further comprises a heat exchanger and a material collection tank sequentially connected along the material flow direction in the guide groove.

[0016] Preferably, it also includes a heat exchange system, which includes a heat exchange circulation tube sleeved outside the output shaft of the stirring motor, a circulating flow cavity is provided inside the heat exchange circulation tube, and a heat exchange feed pipe and a heat exchange liquid outlet pipe are provided on the inner wall of the top of the circulating flow cavity.

[0017] Technical effects and advantages of the present invention: 1. The present invention cooperates with each other among the feed component, the discharge component and the filter component. During production, the high-pressure delivery pump is started by controlling the throttle valve to open a preset opening, and the electric-controlled three-way valve is controlled to connect the throttle valve with the first feed channel, so that the mixed raw materials are continuously added to the reactor body. Due to the addition of materials, the reaction product continuously discharges equimolar amounts of materials, keeping the quality in the reactor unchanged, thereby realizing continuous production and improving production efficiency.

[0018] 2. The present invention cooperates with each other among the feed component, the discharge component and the filter component. When flushing the filtered catalyst, the electric telescopic rod is first controlled to extend, and the telescopic end of the electric telescopic rod will slide toward the conical filter screen, and push the separation sleeve to move up and fit the conical filter screen, thereby dividing the filter tank into two chambers. At this time, the separation sleeve divides the filter tank into two chambers, so that the material can continue to flow from the separation sleeve to the conical filter screen to achieve continuous discharge, and the catalyst can still be filtered while discharging. The feed in the second feed channel flushes the catalyst between the outside of the separation sleeve and the filter tank, thereby avoiding the problem of low reaction efficiency caused by the reduction of catalyst in the reactor body due to continuous production of the reactor body.

[0019] 3. The present invention cooperates with each other among the feed assembly, the discharge assembly and the filter assembly. When the filtered catalyst is flushed, the feed in the second feed channel flushes the catalyst between the outside of the separation sleeve and the filter tank, and at the same time premixes the feed with the catalyst between the outside of the separation sleeve and the filter tank. Then, under the driving action of the feed, the premixed mixture of the outside of the separation sleeve, the feed and the catalyst is flushed back into the reflux tank, and then enters the diversion section through the connecting section, so that the feed and catalyst premix is ​​evenly added to the reactor body, thereby improving the uniformity of mixing the catalyst and the reaction raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the reactor body and the reactor cover of the present invention.

[0022] Figure 3 It is a schematic diagram of the main structure of the reactor of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the reactor cover of the present invention.

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the structure from another angle.

[0025] Figure 6 It is a schematic cross-sectional view of the stirring mechanism and heat exchange system structure of the present invention.

[0026] Figure 7 It is a schematic cross-sectional view of the reactor cover along the diameter of the feed assembly of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the separation sleeve of the present invention.

[0028] Fig. 9 For the present invention Figure 7 Enlarged view of point A in the middle.

[0029] In the figure: 1. Reactor body; 2. Reactor cover; 3. Discharge assembly; 301. Discharge trough; 302. Discharge pipe; 303. Separation sleeve; 3031. Conical part; 3032. Separation part; 3033. Flat plate blocking part; 4. Filter mechanism; 401. Filter trough; 4011. Blocking section; 4012. Blocking release section; 402. Guide trough; 403. Conical filter screen; 404. Reset component; 5. Feed assembly; 501. First feed channel; 5011. Docking section; 5012. Diversion section; 5013. Connecting section; 502. Second feed channel; 503 , electric-controlled three-way valve; 504, first feed pipe; 505, second feed pipe; 506, throttle valve; 507, high-pressure delivery pump; 508, electric telescopic rod; 509, reflux groove; 510, guide piece; 5101, sealing part; 5102, inclined guide part; 6, stirring mechanism; 601, stirring motor; 602, stirring blade; 7, metering device; 8, safety valve; 9, temperature monitoring system; 10, heat exchange system; 1001, heat exchange circulation pipe; 1002, circulating flow cavity; 1003, heat exchange feed pipe; 1004, heat exchange liquid outlet pipe; 11, air intake valve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-Figure 9 As shown, the present invention provides a reaction device for continuous alcohol-ketone condensation reaction, comprising a reactor body 1 and a reactor cover 2 sealed and connected to the reactor body 1. The present invention provides a reaction space by arranging the reactor body 1 and the reactor cover 2, so that a closed cavity can be formed between the two. Specifically, a plurality of threaded columns are arranged in a circular array on the top of the reactor body 1, and the number of threaded columns is preferably at least six. The reactor cover 2 is provided with through holes that are the same in number and matched with the threaded columns on the top. The top of the reactor cover 2 is connected to the threaded columns by nuts, so that a closed cavity can be formed between the two on the one hand, and the reactor cover 2 and the reactor body 1 are detachably connected, so as to facilitate the subsequent maintenance of the reactor body 1.

[0032] Two handles are symmetrically arranged on the side walls of the reactor cover 2 to facilitate taking the reactor cover 2 .

[0033] It also includes: a discharge assembly 3, which is used to discharge the reacted materials at the bottom of the reactor body 1.

[0034] The discharge assembly 3 includes a discharge trough 301, which is opened in the reactor cover 2 and has an internal thread connected to a discharge pipe 302 with one end extending to the bottom of the reactor body 1; the present invention can lift the reacted material at the bottom of the reactor body 1 into the reactor cover 2 by setting the discharge pipe 302.

[0035] The separation sleeve 303 is placed on the top of the discharge pipe 302, and its bottom end extends into the discharge pipe 302 and is slidably connected to the discharge pipe 302. The present invention sets the separation sleeve 303. On the one hand, during filtration, the filtered solid catalyst can enter the outside of the separation sleeve 303, and the reflux groove 509 is blocked at the same time. On the other hand, during reflux, the separation sleeve 303 separates the filter groove 401 into two chambers, so that the internal chamber of the separation sleeve 303 can filter and discharge at the same time, thereby realizing continuous production and improving production efficiency. At the same time, the feed component 5 flushes the external chamber of the separation sleeve 303, so that the filtered solid catalyst refluxes into the reactor body 1, thereby avoiding the problem of low reaction efficiency caused by the reduction of catalyst in the reactor body 1.

[0036] The filter mechanism 4 is disposed inside the reactor cover 2. The present invention provides the filter mechanism 4 to filter out the catalyst in the discharge liquid, and then flush the catalyst into the reactor body 1 through the feed assembly 5, thereby realizing the recycling of the catalyst.

[0037] The filtering mechanism 4 includes a filtering tank 401 and a guide tank 402 which are arranged on the top of the discharge tank 301 and are opened in sequence from bottom to top; the filtering tank 401 is connected to the discharge tank 301, one end of the guide tank 402 is connected to the filtering tank 401, and the other end extends to the side wall of the reactor cover 2; the present invention realizes filtering at the filtering tank 401 by setting the filtering tank 401; the present invention realizes the outlet of the filtered liquid by setting the guide tank 402.

[0038] The conical filter screen 403 is disposed at one end of the guide groove 402 that is connected to the filter groove 401 ; the top of the conical filter screen 403 is detachably connected to the guide groove 402 via a thread.

[0039] The reset component 404 is placed between the top wall of the filter tank 401 and the separation sleeve 303, and is used to push the separation sleeve 303 to reset. By setting the reset component 404, the present invention can, on the one hand, prevent the separation sleeve 303 from sliding up due to the flow of water; on the other hand, it can push the separation sleeve 303 to slide downward to reset and release the separation.

[0040] The feed assembly 5 is placed in the reactor cover 2 and is used to add materials to the reactor body 1. It can push the separation sleeve 303 upward to separate the filter tank 401 into two chambers, so that the inner chamber of the separation sleeve 303 can discharge materials. At the same time, the feed assembly 5 flushes the outer chamber of the separation sleeve 303 to make the filtered solid catalyst flow back into the reactor body 1. The present invention provides the feed assembly 5. On the one hand, it can add materials to the reactor body 1 to ensure continuous reaction and improve production efficiency; on the other hand, it can cooperate with the separation sleeve 303 to flush the catalyst outside the separation sleeve 303 back into the reactor body 1, avoiding the problem of low reaction efficiency caused by the reduction of catalyst in the reactor body 1.

[0041] Specifically, the feed assembly 5 includes a first feed channel 501, which is opened in the reactor cover 2, one end of which is connected to the inside of the reactor body 1, and the other end extends to the side wall of the reactor cover 2. Further, the first feed channel 501 includes a docking section 5011, a plurality of diverting sections 5012 and a connecting section 5013, the docking section 5011 is opened on the side wall of the reactor cover 2, and is used to dock with the first feed pipe 504, the plurality of diverting sections 5012 are arranged in a circumferential array at the bottom of the reactor cover 2, and the connecting section 5013 is used to connect the plurality of diverting sections 5012, and the connecting section 5013 is connected to the docking section 5011.

[0042] The second feed channel 502 is opened in the reactor cover 2, one end of which is connected to the filter tank 401, and the other end extends to the side wall of the reactor cover 2; the second feed channel 502 is provided in the present invention to connect with the second feed pipe 505.

[0043] The first interface of the electric-controlled three-way valve 503 is connected to the first feed channel 501 through a conduit and a first feed pipe 504, the second interface is connected to the second feed channel 502 through a conduit and a second feed pipe 505, and the third interface is connected to a raw material mixing tank through a conduit, a throttle valve 506 and a high-pressure delivery pump 507 in sequence; the present invention is used to control the feeding of the first feed pipe 504 and the second feed pipe 505 by setting the electric-controlled three-way valve 503. When the first feed pipe 504 is controlled to feed, direct feeding is performed at this time; when the second feed pipe 505 is controlled to feed, the material entering at this time first flushes the catalyst filtered out of the filter tank 401. The raw material mixing tank contains a mixture of isoamyl alcohol and acetone. The raw material mixing tank is a prior art and is not shown in the figure.

[0044] The electric telescopic rod 508, whose telescopic end passes through and extends into the second feed pipe 505, can push the separation sleeve 303 to move upward and fit with the conical filter screen 403, so that the filter tank 401 is divided into two chambers; the present invention sets the electric telescopic rod 508, so that the telescopic end of the electric telescopic rod 508 can slide toward the conical filter screen 403, and push the separation sleeve 303 to move upward and fit with the conical filter screen 403, so as to divide the filter tank 401 into two chambers.

[0045] The reflux groove 509 is connected to the first feed channel 501. When the separation sleeve 303 moves up and fits with the conical filter 403, the separation sleeve 303 releases the blockage of the reflux groove 509, so that the catalyst refluxes to the first feed channel 501. The present invention sets the reflux groove 509 to make the filtered catalyst flushed and refluxed into the first feed channel 501, and then through the diversion of the first feed channel 501, the filtered catalyst can be evenly flowed to various parts of the reactor body 1, thereby improving the mixing uniformity of the refluxed catalyst, thereby improving the production efficiency; avoiding the problem of the catalyst agglomerating in one place, resulting in poor production rate in other areas.

[0046] The guide member 510 is placed in the middle of the telescopic end of the electric telescopic rod 508, and is used to guide the incoming liquid to the top of the filter tank 401, so that the catalyst accumulated on the top of the filter tank 401 can be washed away. Specifically, the guide member 510 includes a sealing portion 5101 and an inclined guide portion 5102. In the process of the guide member 510 guiding the liquid to enter, due to the inclined surface setting of the inclined guide portion 5102, the liquid can be guided to flow obliquely upward and directly flush the catalyst accumulated on the top of the filter tank 401, thereby better taking away the accumulated catalyst. In this process, not only the liquid that has just entered completes the flushing of the accumulated catalyst, and solves the problem of the accumulation of the filtered catalyst, the liquid contacts the accumulated catalyst, and can carry out a preliminary catalytic reaction, thereby improving the reaction effect; and the catalyst washed away by the liquid can be carried away by the liquid, and enters the reactor body 1 again evenly through multiple diversion sections 5012 and connecting sections 5013, and continues to carry out the catalytic reaction, thereby improving the uniform dispersion effect of the catalyst.

[0047] The separation sleeve 303 includes a conical portion 3031 that cooperates with the conical filter screen 403. The present invention sets the conical portion 3031. On the one hand, it can form a wedge-shaped fit with the electric telescopic rod 508, so that the separation sleeve 303 can be pushed upward under the action of the electric telescopic rod 508. On the other hand, due to the setting of the gradual outward expansion of the conical portion 3031, the catalyst filtered by the conical filter screen 403 is guided to the outside of the separation sleeve 303 to facilitate subsequent reflux.

[0048] The partition 3032 is disposed at the bottom of the conical portion 3031 . The present invention can separate the filter tank 401 into two chambers by providing the partition 3032 .

[0049] The flat plate blocking portion 3033 is disposed on the side wall of the partition portion 3032. When the partition sleeve 303 is at the bottom, it is used to block the reflux groove 509. When the partition sleeve 303 is at the top, it releases the blockage of the reflux groove 509. The present invention is used to achieve the blocking of the flat plate blocking portion 3033 by setting the flat plate blocking portion 3033.

[0050] Specifically, the filter tank 401 includes a blocking section 4011 that cooperates with the flat plate blocking portion 3033 .

[0051] The blockage release section 4012 has a diameter greater than that of the blockage section 4011 .

[0052] It also includes a stirring mechanism 6 which is placed inside the reactor body 1 and is used to stir the materials inside the reactor body 1 .

[0053] The stirring mechanism 6 includes a stirring motor 601, the output shaft of the stirring motor 601 extends into the interior of the reactor body 1, and a stirring blade 602 is disposed at the end of the output shaft of the stirring motor 601. The present invention provides the stirring mechanism 6, and controls the stirring motor 601 to work. The stirring motor 601 works to drive the output shaft to rotate, and the output shaft rotation drives the stirring blade 602 to rotate. The stirring blade 602 rotates to fully stir the material inside the reactor body 1, thereby increasing the reaction speed and further increasing the production efficiency.

[0054] It also includes a metering device 7 which is placed at the bottom of the reactor body 1 and can weigh the reactor body 1 and the materials therein. The present invention monitors the amount of materials entering and leaving the reactor body 1 by setting the metering device 7 .

[0055] It also includes an air inlet valve 11 and a safety valve 8, both of which are placed on the side walls of the reactor cover 2 and connected to the inside of the reactor body 1. When the pressure in the reactor body 1 exceeds a predetermined value, the safety valve 8 opens. The present invention prevents the system from being damaged due to excessive pressure by arranging the safety valve 8.

[0056] It also includes a temperature monitoring system 9, which includes a temperature sensor that penetrates the reactor cover 2 and is inserted into the reactor body 1. The present invention is used to monitor the internal temperature of the reactor body 1 in real time by setting the temperature monitoring system 9.

[0057] The discharge assembly 3 also includes a heat exchanger and a material collection tank sequentially connected along the material flow direction in the guide groove 402 .

[0058] The heat exchange system 10 is also included. The heat exchange system 10 includes a heat exchange circulation tube 1001 sleeved outside the output shaft of the stirring motor 601. A circulation flow cavity 1002 is provided inside the heat exchange circulation tube 1001. A heat exchange feed pipe 1003 and a heat exchange liquid outlet pipe 1004 are provided on the top inner wall of the circulation flow cavity 1002. The present invention controls the temperature of the heat exchange liquid introduced into the heat exchange system 10. On the one hand, it is used to control the temperature in the reactor body 1. On the other hand, it is used to reduce the temperature of the output shaft of the stirring motor 601 to avoid the occurrence of motor failure caused by excessively high temperature of the output shaft of the stirring motor 601.

[0059] During production, firstly, a preset amount of catalyst is added into the reactor, then the high-pressure delivery pump 507 is controlled to start and the throttle valve 506 is fully opened, and at the same time, the electronically controlled three-way valve 503 is controlled to make only the throttle valve 506 and the first feed channel 501 conductive, and the liquid in the raw material mixing tank enters the first feed channel 501 through the high-pressure delivery pump 507, the throttle valve 506 and the electronically controlled three-way valve 503, and finally enters the reactor body 1, thereby realizing the filling of the preset amount of material; then the high-pressure delivery pump 507 is controlled to stop working, the throttle valve 506 is closed, and the electronically controlled three-way valve 503 is closed.

[0060] Then, the stirring mechanism 6 is controlled to stir the materials in the reactor body 1 to achieve mixing of the liquid in the raw material mixing tank and the catalyst; at the same time, the reactor body 1 is controlled to heat up to a preset temperature, which is the optimal reaction temperature; during the reaction, due to the setting of the safety valve 8 on the top of the reactor body 1, the interior thereof is always kept at a fixed air pressure, and the high-pressure delivery pump 507 is controlled to start, and the throttle valve 506 is controlled to open a preset opening, and the electric-controlled three-way valve 503 is controlled to connect the throttle valve 506 with the first feed channel 501, and the mixed raw materials are continuously added to the reactor body 1. Due to the addition of materials, the reaction product continuously outputs an equimolar amount of materials to keep the quality in the reactor unchanged; thereby achieving continuous production and improving production efficiency.

[0061] During discharge, the material in the reactor body 1 enters the filter tank 401 through the discharge pipe 302, and the material is then filtered through the conical filter screen 403. The catalyst in the material is filtered and discharged. The filtered catalyst forms a guide due to the setting of the conical filter screen 403 and the conical portion 3031, so that the catalyst flows out from between the conical filter screen 403 and the separation sleeve 303 to the filter tank 401, so as to facilitate the subsequent flushing and reflux of the catalyst.

[0062] In the above filtering stage, the electric telescopic rod 508 can be controlled to repeatedly extend and retract to adjust the separation sleeve 303 and the conical filter screen 403 to repeatedly conflict with each other, thereby avoiding the conical filter screen 403 from being blocked.

[0063] When it is necessary to flush the filtered catalyst and make it flow back into the reactor body 1, the electric telescopic rod 508 is first controlled to extend, and the telescopic end of the electric telescopic rod 508 will slide toward the conical filter screen 403, and push the separation sleeve 303 to move up and fit and seal with the conical filter screen 403, so as to separate the filter tank 401 into two chambers, and finally make the flat plate blocking part 3033 move up to release the blocking state of the reflux tank 509. Then the electric three-way valve 503 is controlled to make the throttle valve 506 and the first feed channel 501 not conduct, and at the same time, the electric three-way valve 503 is controlled to make the throttle valve 506 and the second feed channel 502 conduct. At this time, since the separation sleeve 303 separates the filter tank 401 into two chambers, the material can continue to flow from the separation sleeve 303 to the conical filter screen 403 to achieve continuous discharge, and the catalyst can still be filtered while discharging. Due to the conical setting of the conical filter screen 403, the catalyst is retained at the top between the conical filter screen 403 and the separation sleeve 303. At the same time, the feed in the second feed channel 502 washes the catalyst between the outside of the separation sleeve 303 and the filter tank 401, and at the same time, the feed and the outside of the separation sleeve 303 are connected. The catalyst between the filter tanks 401 is premixed, and then under the driving force of the feed, the premixed mixture of the feed and the catalyst outside the separation sleeve 303 is flushed back to the reflux tank 509, and then enters the diversion section 5012 through the connecting section 5013, so that the feed and the catalyst premix are evenly added to the reactor body 1. On the one hand, the uniformity of mixing the catalyst and the reaction raw materials is improved, and on the other hand, the problem of low production efficiency caused by the reduction of the catalyst in the reactor body 1 due to the continuous production of the reactor body 1 is avoided.

[0064] When the catalyst is no longer to be flushed, the catalyst remaining between the conical filter 403 and the separation sleeve 303 is reset, and a flow gap is formed between the conical filter 403 and the separation sleeve 303. Under the action of liquid flow, the catalyst remaining between the conical filter 403 and the separation sleeve 303 will flow into the filter tank 401, thereby facilitating the next flushing of the filter tank 401.

[0065] Finally, it should be noted that the above is only 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, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reaction device for continuous alcohol-ketone condensation reaction, comprising a reactor body (1) and a reactor cover (2) sealedly connected to the reactor body (1), characterized in that: Also includes: A discharge assembly (3) for discharging the reacted material from the bottom of the reactor body (1); The discharge assembly (3) comprises a discharge trough (301) which is disposed in the reactor cover (2) and has an internal thread connected to a discharge pipe (302) having one end extending to the bottom of the reactor body (1); A separation sleeve (303) is placed on the top of the discharge pipe (302), with a bottom end extending into the discharge pipe (302) and slidably connected to the discharge pipe (302); A filtering mechanism (4) is placed inside the reactor cover (2); The filtering mechanism (4) comprises a filtering groove (401) and a guide groove (402) which are arranged on the top of the discharge groove (301) and are opened in sequence from bottom to top; the filtering groove (401) is connected to the discharge groove (301); one end of the guide groove (402) is connected to the filtering groove (401), and the other end extends to the side wall of the reaction kettle cover (2); A conical filter screen (403) is disposed at one end of the guide groove (402) that is connected to the filter groove (401); A reset component (404) is disposed between the top wall of the filter tank (401) and the separation sleeve (303) and is used to push the separation sleeve (303) to reset; The feed assembly (5) is placed in the reactor cover (2) and is used to replenish materials to the reactor body (1). The feed assembly (5) can push the separation sleeve (303) upward to separate the filter tank (401) into two chambers, so that the inner chamber of the separation sleeve (303) can be discharged. At the same time, the feed assembly (5) flushes the outer chamber of the separation sleeve (303) so that the filtered solid catalyst flows back into the reactor body (1).

2. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: The feed assembly (5) comprises a first feed channel (501), which is opened in the reactor cover (2), one end of which is connected to the interior of the reactor body (1), and the other end of which extends to the side wall of the reactor cover (2); A second feed channel (502) is provided in the reactor cover (2), one end of which is connected to the filter tank (401) and the other end of which extends to the side wall of the reactor cover (2); An electrically controlled three-way valve (503), wherein a first interface is connected to a first feed channel (501) via a conduit and a first feed pipe (504), a second interface is connected to a second feed channel (502) via a conduit and a second feed pipe (505), and a third interface is connected to a raw material mixing tank via a conduit, a throttle valve (506) and a high-pressure delivery pump (507) in sequence; An electric telescopic rod (508), the telescopic end of which penetrates and extends into the second feed pipe (505), and is capable of pushing the separation sleeve (303) to move upward and fit with the conical filter screen (403), so that the filter tank (401) is separated into two chambers; A reflux groove (509) is connected to the first feed channel (501). When the separation sleeve (303) moves upward and fits with the conical filter screen (403), the separation sleeve (303) releases the blockage of the reflux groove (509), thereby enabling the catalyst to reflux to the first feed channel (501); The guide member (510) is disposed in the middle of the telescopic end of the electric telescopic rod (508) and is used to guide the incoming liquid to the top of the filter tank (401).

3. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: The separation sleeve (303) comprises a conical portion (3031) that matches the conical filter screen (403); A partition (3032) disposed at the bottom of the conical portion (3031); The flat plate blocking portion (3033) is disposed on the side wall of the partition portion (3032) and is used to block the reflux groove (509) when the partition sleeve (303) is located at the bottom; and to release the blockage of the reflux groove (509) when the partition sleeve (303) is located at the top.

4. The reaction device for continuous alcohol-ketone condensation reaction according to claim 3, characterized in that: The filter tank (401) comprises a blocking section (4011) that cooperates with the flat plate blocking portion (3033); The blockage release section (4012) has a diameter greater than that of the blockage section (4011).

5. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: It also includes a stirring mechanism (6), which is placed inside the reactor body (1) and is used to stir the materials inside the reactor body (1); The stirring mechanism (6) comprises a stirring motor (601), the output shaft of the stirring motor (601) extending into the interior of the reactor body (1), and a stirring blade (602) being provided at the end of the output shaft of the stirring motor (601).

6. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: It also includes a meter (7) which is placed at the bottom of the reactor body (1).

7. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: It also includes an air inlet valve (11) and a safety valve (8), both of which are arranged on the peripheral side wall of the reactor cover (2) and are connected to the interior of the reactor body (1). When the pressure in the reactor body (1) exceeds a predetermined value, the safety valve (8) opens.

8. The reaction device for continuous alcohol-ketone condensation reaction according to claim 1, characterized in that: It also includes a temperature monitoring system (9), wherein the temperature monitoring system (9) includes a temperature sensor that penetrates the reactor cover (2) and is inserted into the reactor body (1).

9. The reaction device for continuous alcohol-ketone condensation reaction according to claim 3, characterized in that: The discharge assembly (3) further comprises a heat exchanger and a material collection tank which are sequentially connected along the material flow direction in the guide groove (402).

10. The reaction device for continuous alcohol-ketone condensation reaction according to claim 5, characterized in that: The invention also comprises a heat exchange system (10), wherein the heat exchange system (10) comprises a heat exchange circulation tube (1001) sleeved outside the output shaft of the stirring motor (601), wherein a circulation flow cavity (1002) is provided inside the heat exchange circulation tube (1001), and a heat exchange feed pipe (1003) and a heat exchange liquid outlet pipe (1004) are provided on the top inner wall of the circulation flow cavity (1002).

Images