Novel fluidized bed reactor for hydrogen peroxide production

Abstract

The utility model discloses a novel fluidized bed reactor for hydrogen peroxide production, which relates to the technical field of fluidized bed reactors and comprises a fluidized bed reactor body provided with a hydrogen inlet pipe at the lower end, a guide cylinder is arranged on the inner side of the fluidized bed reactor body, and a cleaning part is arranged on the inner side of the guide cylinder. A transmission assembly connected with the cleaning part is arranged at the hydrogen inlet pipe, and in the process of introducing hydrogen into the fluidized bed reactor body through the hydrogen inlet pipe, the transmission assembly drives the cleaning part to rotate, so that the cleaning part cleans a catalyst mixture attached to the inner wall of the guide cylinder; the plurality of cleaning blocks are matched with the elastic compression parts II, so that the cleaning blocks at the corresponding positions can be stressed to retract into the chutes II when the catalyst mixture with tight local attachment is encountered, and the normal cleaning effect of other cleaning blocks cannot be influenced; and the catalyst mixture which is tightly attached to the local part can be scraped by the cleaning block through multiple times.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluidized bed reactor technical field especially relates to a novel fluidized bed reactor for hydrogen peroxide production. BACKGROUND

[0002] Hydrogen peroxide is an important chemical raw material, and is widely used in papermaking, textile, pharmaceutical, food processing and other industries. The traditional hydrogen peroxide production method mainly adopts anthraquinone method, and the anthraquinone method has the advantages of low energy consumption, environmental protection, good safety, and is suitable for large-scale production. However, in the process of fixed bed catalytic hydrogenation reaction, because the catalyst is in a fixed state, the contact area of the reactant and the catalyst is limited, the hydrogenation reaction efficiency is low, and the product yield is low. The fluidized bed reactor becomes a potential technology for improving the production efficiency of hydrogen peroxide and reducing the production cost due to its high mass transfer and heat transfer efficiency, and the continuous circulation of the catalyst. The principle of producing hydrogen peroxide by using fluidized bed reactor is mainly based on the direct synthesis reaction of oxygen and hydrogen in the presence of catalyst.

[0003] After searching, the patent with publication number CN106629618B provides a fluidized bed hydrogenation reaction and separation process and device for producing hydrogen peroxide by anthraquinone method. The working fluid and hydrogen are continuously added into the fluidized bed reactor containing catalyst, and hydrogenation reaction occurs. Under the driving of gas, the reaction material moves upward to the top of the draft tube and downward through the membrane separator for filtration. The filtered hydrogenation clear liquid flows to the hydrogenation clear liquid storage tank, and the catalyst is intercepted on the filter element and returned to the reactor for continuous reaction by backflush operation. In the upper part of the reactor, the unreacted hydrogen gas carries a small amount of working fluid, which is separated by the circulating gas separator and then returned to the reactor by the circulating compressor for reaction. When the built-in membrane separator is regenerated, an external membrane separator is used for separation. The fluidized bed reactor makes the raw materials and catalyst mix uniformly, the reaction uniformity is good, the utilization efficiency of the catalyst is high, the side reaction is less, and high-concentration hydrogen peroxide product can be obtained.

[0004] Based on the above search, combined with the prior art, it is found that in the prior art, similar to the above disclosed fluidized bed reactor, in the reaction process, because a large amount of water vapor exists, the catalyst is easily attached to the inner wall of the draft tube, which leads to the decrease of the inner diameter of the draft tube and the decrease of the reaction efficiency. Therefore, a novel fluidized bed reactor for hydrogen peroxide production is proposed to solve the above problems. Utility model content

[0005] The purpose of the present application is to provide a novel fluidized bed reactor for hydrogen peroxide production to solve the problems in the background art.

[0006] To achieve the above object, the application provides the following technical scheme: a novel fluidized bed reactor for hydrogen peroxide production, comprising a fluidized bed reactor body with a hydrogen inlet pipe and a gas outlet pipe respectively installed at the upper end and the lower end, a slurry outlet pipe and a clear liquid outlet pipe installed at the middle part of the fluidized bed reactor body, and a catalyst adding pipe and a working liquid inlet pipe installed at the bottom end of the fluidized bed reactor body:

[0007] A draft tube is arranged at the middle part of the inner side of the fluidized bed reactor body, and a cleaning part is arranged at the inner side of the draft tube and is in sliding fit with the circumferential inner wall of the draft tube.

[0008] A transmission assembly connected with the cleaning part is arranged at the hydrogen inlet pipe, and the transmission assembly rotates with the cleaning part during the process of passing hydrogen into the inner side of the fluidized bed reactor body through the hydrogen inlet pipe.

[0009] As a further supplement to the present scheme, a membrane separator is arranged between the fluidized bed reactor body and the draft tube, and the clear liquid outlet pipe is located at the upper side of the membrane separator.

[0010] As a further supplement to the present scheme, a gas-liquid distributor is arranged at the bottom of the draft tube, and the hydrogen inlet pipe and the working liquid inlet pipe are in communication with the gas-liquid distributor.

[0011] As a further supplement to the present scheme, the cleaning part comprises a transmission shaft, a horizontal shaft and a cleaning seat, the transmission shaft vertically penetrates the gas-liquid distributor, the cleaning seat is vertically attached to the inner wall of the draft tube, and the cleaning seat is connected with the transmission shaft through the horizontal shaft.

[0012] The end of the horizontal shaft away from the transmission shaft is provided with a sliding groove one, the side end of the cleaning seat is fixed with a sliding block in sliding fit with the sliding groove one, and the sliding block is fixed with the inner wall of the sliding groove one through an elastic compression member one.

[0013] As a further supplement to the present scheme, the end face of the cleaning seat away from the horizontal shaft is provided with a sliding groove two, a plurality of cleaning blocks in mutual fit are arranged at the inner side of the sliding groove two from top to bottom, and the cleaning blocks are fixed with the inner wall of the sliding groove two through an elastic compression member two.

[0014] As a further supplement to the present scheme, the transmission assembly comprises an impeller fixed at the bottom end of the transmission shaft.

[0015] As a further supplement to the present scheme, the transmission assembly comprises a dispersion pipe horizontally and rotatably installed at the top end of the hydrogen inlet pipe, gas holes are symmetrically and obliquely arranged at the two side ends of the dispersion pipe, and a transition pipe covered outside the dispersion pipe is fixedly and communicatively arranged between the hydrogen inlet pipe and the gas-liquid distributor.

[0016] In summary, the technical effects and advantages of the present application are:

[0017] 1. The utility model discloses a cleaning part is arranged on the inside of the flow guide cylinder, and the cleaning part is slidably attached to the circumferential inner wall of the flow guide cylinder, a transmission assembly connected with the cleaning part is arranged at the hydrogen inlet pipe, during the process of hydrogen being introduced into the fluidized bed reactor body from the hydrogen inlet pipe, the transmission assembly rotates with the cleaning part, so that the cleaning part cleans the catalyst mixture attached to the inner wall of the flow guide cylinder, which is beneficial to improve the stability and reaction efficiency of the reaction.

[0018] 2. The utility model discloses a plurality of cleaning blocks cooperate with the setting of elastic compression piece no. 2 can when meeting partial attachment of the catalyst mixture that is relatively tight, the cleaning block of corresponding position can be contracted into the sliding groove no. 2 under force, and the normal cleaning effect of other cleaning blocks will not be affected, and the catalyst mixture that is relatively tight locally attached can be scraped off by the cleaning block multiple times. ACCURACY

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is a whole plane structure schematic view of one of the embodiments in the present embodiment.

[0021] Figure 2 It is a structure schematic view of the cleaning part in the present embodiment.

[0022] Figure 3 It is a split structure schematic view of the cleaning part in the present embodiment.

[0023] Figure 4 It is Figure 3 It is an enlarged structure schematic view of A in the present embodiment.

[0024] Figure 5 It is a whole plane structure schematic view of another embodiment in the present embodiment.

[0025] In the drawing: 1, fluidized bed reactor body; 2, hydrogen inlet pipe; 3, working liquid inlet pipe; 4, gas-liquid distributor; 5, catalyst adding pipe; 6, gas outlet pipe; 7, slurry outlet pipe; 8, clear liquid outlet pipe; 9, flow guide cylinder; 10, membrane separator; 11, cleaning part; 111, transmission shaft; 112, cross shaft; 11201, sliding groove one; 113, cleaning seat; 11301, sliding groove two; 114, sliding block; 115, elastic compression piece one; 116, cleaning block; 117, elastic compression piece two; 12, impeller; 13, dispersion pipe; 1301, air hole; 14, transition pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] Embodiment: Reference Figures 1-5 The novel fluidized bed reactor for hydrogen peroxide production shown in the drawing, including the fluidized bed reactor body 1 which is installed with hydrogen inlet pipe 2 and gas outlet pipe 6 at the upper and lower ends respectively, the middle part of the fluidized bed reactor body 1 is installed with slurry outlet pipe 7 and clear liquid outlet pipe 8, the bottom end of the fluidized bed reactor body 1 is also installed with catalyst adding pipe 5 and working liquid inlet pipe 3, the membrane separator 10 is arranged between the fluidized bed reactor body 1 and the flow guide cylinder 9, the clear liquid outlet pipe 8 is located on the upper side of the membrane separator 10, the bottom of the flow guide cylinder 9 is provided with a gas-liquid distributor 4, the hydrogen inlet pipe 2 and the working liquid inlet pipe 3 are both communicated with the gas-liquid distributor 4, and the inner side of the middle part of the fluidized bed reactor body 1 is provided with the flow guide cylinder 9.

[0028] The above structure and its matching working principle are all mature technologies, which can be roughly summarized as follows: hydrogen and working liquid are respectively introduced from the hydrogen inlet pipe 2 and the working liquid inlet pipe 3, the hydrogen and the working liquid are mixed and uniformly distributed by the gas-liquid distributor 4, then move upward along the flow guide cylinder 9, the palladium catalyst is added through the catalyst adding pipe 5, and the hydrogen and the working liquid contact the catalyst during the upward movement, and the hydrogenation reaction occurs under the action of the catalyst to obtain a mixed solution of hydrogenated liquid and catalyst; the mixed solution of hydrogenated liquid and catalyst after reaction is filtered by the membrane separator 10 outside the flow guide cylinder 9, the filtered hydrogenated clear liquid flows out through the clear liquid outlet pipe 8, and the catalyst is intercepted in the fluidized bed reactor body 1 to continue to participate in the reaction.

[0029] The inner side of the flow guide cylinder 9 is provided with a cleaning part 11, the cleaning part 11 is in sliding fit with the circumferential inner wall of the flow guide cylinder 9, the hydrogen inlet pipe 2 is provided with a transmission assembly connected with the cleaning part 11, and the transmission assembly rotates with the cleaning part 11 during the process of introducing hydrogen into the inner side of the fluidized bed reactor body 1 through the hydrogen inlet pipe 2, so as to clean the catalyst mixture attached to the inner wall of the flow guide cylinder 9, which is beneficial to improve the stability and efficiency of the reaction.

[0030] Regarding the cleaning part 11, specifically, the cleaning part 11 includes a transmission shaft 111, a cross shaft 112 and a cleaning seat 113, the transmission shaft 111 vertically penetrates the gas-liquid distributor 4, the cleaning seat 113 vertically adheres to the inner wall of the flow guide cylinder 9, and the cleaning seat 113 is connected with the transmission shaft 111 through the cross shaft 112, the end of the cross shaft 112 away from the transmission shaft 111 is provided with a sliding groove one 11201, the side end of the cleaning seat 113 is fixed with a sliding block 114 which is slidingly matched with the sliding groove one 11201, and the sliding block 114 is fixed with the inner wall of the sliding groove one 11201 through an elastic compression member one 115.

[0031] Based on the cooperation of the above structure, in the process of rotating the cleaning seat 113 through the cross shaft 112 by the transmission shaft 111, the catalyst mixture attached to the inner wall of the flow guide cylinder 9 can be scraped off by the cleaning seat 113, and the catalyst mixture with tight adhesion can be scraped off by the cleaning seat 113 through multiple times.

[0032] As we all know, the adhesion of the catalyst mixture with tight adhesion will decrease after each lateral collision from the cleaning seat 113, so the catalyst mixture with tight adhesion can be scraped off by the cleaning seat 113 through multiple collisions.

[0033] Further, the end face of the cleaning seat 113 away from the cross shaft 112 is provided with a sliding groove two 11301, the inner side of the sliding groove two 11301 is provided with a plurality of cleaning blocks 116 which are adhered to each other from top to bottom, and the cleaning blocks 116 are fixed with the inner wall of the sliding groove two 11301 through an elastic compression member two 117, the plurality of cleaning blocks 116 cooperating with the elastic compression member two 117 can be forced to shrink into the sliding groove two 11301 when encountering locally attached catalyst mixture with tight adhesion, without affecting the normal cleaning effect of other cleaning blocks 116, and the locally attached catalyst mixture with tight adhesion can be scraped off by the cleaning blocks 116 through multiple times.

[0034] As one of the embodiments of the present embodiment, the transmission assembly includes an impeller 12 fixed to the bottom end of the transmission shaft 111, and the hydrogen gas flowing through the hydrogen inlet pipe 2 drives the impeller 12 to rotate, and the impeller 12 drives the cleaning part 11 to rotate.

[0035] The utility model discloses a working principle: through the process that hydrogen inlet pipe 2 is towards the hydrogen import of fluidized bed reactor body 1 inside, utilize hydrogen flow to push impeller 12 rotation, and impeller 12 then carries cleaning unit 11 rotation, can utilize cleaning block 116 to scrape off the catalyst mixture adhered on the inner wall of flow guide cylinder 9, and multiple cleaning block 116 cooperate the setting of elastic compression spare two 117 can when meeting partial adhering tighter catalyst mixture, corresponding position's cleaning block 116 can force shrink into the chute two 11301, and will not affect the normal cleaning effect of other cleaning block 116, and partial adhering tighter catalyst mixture can utilize cleaning block 116 multiple times to realize scraping.

[0036] As another embodiment of the present embodiment, the transmission assembly includes a dispersion pipe 13 horizontally rotatably installed at the top end of the hydrogen inlet pipe 2, gas holes 1301 are symmetrically and obliquely formed at both ends of the dispersion pipe 13, a transition pipe 14 is fixedly connected between the hydrogen inlet pipe 2 and the gas-liquid distributor 4, and the transition pipe 14 is arranged outside the dispersion pipe 13. Hydrogen enters the dispersion pipe 13 through the hydrogen inlet pipe 2 and overflows from the gas holes 1301 at both ends of the dispersion pipe 13, so that the dispersion pipe 13 rotates under the reverse force of the gas overflow, thereby rotating the cleaning unit 11.

[0037] Finally, it should be noted that: the above only for the preferred embodiment of the utility model has described, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A novel fluidized bed reactor for hydrogen peroxide production, comprising a fluidized bed reactor body (1) with a hydrogen inlet pipe (2) and a gas outlet pipe (6) installed at the upper and lower ends respectively, a slurry outlet pipe (7) and a clear liquid outlet pipe (8) installed at the middle of the fluidized bed reactor body (1), and a catalyst adding pipe (5) and a working liquid inlet pipe (3) installed at the bottom end of the fluidized bed reactor body (1), characterized in that: a draft tube (9) is arranged at the middle of the inner side of the fluidized bed reactor body (1), a cleaning part (11) is arranged at the inner side of the draft tube (9), and the cleaning part (11) is in sliding fit with the circumferential inner wall of the draft tube (9); a transmission assembly connected with the cleaning part (11) is arranged at the hydrogen inlet pipe (2), and the transmission assembly rotates with the cleaning part (11) during the process of introducing hydrogen into the inner side of the fluidized bed reactor body (1) through the hydrogen inlet pipe (2); a membrane separator (10) is arranged between the fluidized bed reactor body (1) and the draft tube (9), and the clear liquid outlet pipe (8) is located at the upper side of the membrane separator (10); a gas-liquid distributor (4) is arranged at the bottom of the draft tube (9), and the hydrogen inlet pipe (2) and the working liquid inlet pipe (3) are in communication with the gas-liquid distributor (4); the cleaning part (11) comprises a transmission shaft (111), a cross shaft (112), and a cleaning seat (113), the transmission shaft (111) vertically penetrates the gas-liquid distributor (4), the cleaning seat (113) is vertically attached to the inner wall of the draft tube (9), and the cleaning seat (113) is connected with the transmission shaft (111) through the cross shaft (112); a sliding groove one (11201) is arranged at the end of the cross shaft (112) away from the transmission shaft (111), a sliding block (114) slidably fitted with the sliding groove one (11201) is fixed to the side end of the cleaning seat (113), and the sliding block (114) is fixed to the inner wall of the sliding groove one (11201) through an elastic compression member one (115); a sliding groove two (11301) is arranged at the end face of the cleaning seat (113) away from the cross shaft (112), a plurality of cleaning blocks (116) are arranged on the inner side of the sliding groove two (11301) from top to bottom and in mutual fit, and the cleaning blocks (116) are fixed to the inner wall of the sliding groove two (11301) through an elastic compression member two (117); the transmission assembly comprises an impeller (12) fixed to the bottom end of the transmission shaft (111); the transmission assembly comprises a dispersion pipe (13) horizontally and rotationally installed at the top end of the hydrogen inlet pipe (2), gas holes (1301) are symmetrically and obliquely arranged at the two side ends of the dispersion pipe (13), and a transition pipe (14) covering the outer side of the dispersion pipe (13) is fixedly and communicatively arranged between the hydrogen inlet pipe (2) and the gas-liquid distributor (4). ​ ​ 2. A novel fluidized bed reactor for hydrogen peroxide production according to claim 1, characterized in that: ​ 3. A novel fluidized bed reactor for hydrogen peroxide production according to claim 2, characterized in that: ​ 4. A novel fluidized bed reactor for hydrogen peroxide production according to claim 3, characterized in that: ​ ​ 5. A novel fluidized bed reactor for hydrogen peroxide production as claimed in claim 4, wherein: ​ 6. A novel fluidized bed reactor for hydrogen peroxide production as claimed in claim 5, wherein: ​ 7. A novel fluidized bed reactor for hydrogen peroxide production as claimed in claim 5, wherein: ​

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