Depolymerization device for paraldehyde mother liquor
By designing a depolymerization device for triacetal mother liquor including a mixing box, a preheating conveying assembly and a heating assembly, the problems of low heat exchange efficiency and uneven mixing of existing devices are solved, and efficient depolymerization of triacetal mother liquor and catalyst mixing are achieved.
Patent Information
- Application Number
- CN202510290568.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-05-27
AI Technical Summary
When used, the existing depolymerization device for the depolymerization of acetaldehyde mother liquor covers a large area, has a small heat exchange area and a low heat exchange efficiency, which affects the depolymerization effect. Moreover, the mixing of the triacetaldehyde mother liquor and the catalyst is uneven, reducing the understanding of the polymerization efficiency.
A depolymerization device including a kettle body, a mixing box, a preheating conveying assembly and a heating assembly is designed. The mixing box is used to uniformly mix the peracetaldehyde mother liquor and the catalyst, and the preheating conveying module is used to preheat the peracetaldehyde mother liquor. The heating module includes a hollow liquid separation plate, a second hollow plate and a sealed heating tank to improve the depolymerization efficiency through steam heating.
By increasing the heat exchange area and efficiency, the floor area is reduced, the depolymerization efficiency of the peracetaldehyde mother liquor is improved, and the depolymerization and dispersion uniformity of the peracetaldehyde mother liquor and the catalyst is improved by uniformly mixing the catalyst.
Smart Images
Figure CN120037871A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of depolymerization of paraldehyde mother liquor, in particular to a depolymerization device for paraldehyde mother liquor. Background Art
[0002] When acetaldehyde is polymerized to produce tetraacetaldehyde, a large amount of acetaldehyde is simultaneously polymerized to trimeraldehyde, and the trimeraldehyde must be depolymerized to acetaldehyde and then recycled as a raw material for synthesizing tetraacetaldehyde. When depolymerizing the trimeraldehyde mother liquor, a trimeraldehyde mother liquor depolymerization device is required.
[0003] In the prior art, when the depolymerization device for paraldehyde mother liquor is used, an enamel reactor is generally used as the depolymerization reactor, and steam is introduced into the coil and jacket in the reactor to heat the material, which occupies a large area, has a small heat exchange area, and has low heat exchange efficiency, which affects the depolymerization effect of the paraldehyde mother liquor. In addition, when the paraldehyde mother liquor and the catalyst are added, they are generally directly put into the reactor, which is easy to be unevenly dispersed, and it is not convenient to mix the paraldehyde mother liquor and the catalyst, which reduces the depolymerization efficiency of the paraldehyde mother liquor and the catalyst. Therefore, a depolymerization device for paraldehyde mother liquor is urgently needed to solve the above problems. Summary of the invention
[0004] In view of the shortcomings of the prior art, the present invention aims to provide a depolymerization device for paraldehyde mother liquor to solve the problems raised in the above background technology. The present invention has a reasonable structure, small footprint, large heat exchange area, high heat exchange efficiency and high depolymerization efficiency.
[0005] In order to achieve the above object, the present invention is implemented by the following technical scheme: a depolymerization device for paraldehyde mother liquor, comprising: A kettle body, wherein the side walls of the kettle body are respectively provided with an air inlet pipe and an air outlet pipe for conveying steam, a feed pipe is provided on the top of the kettle body, and a discharge pipe is provided on the bottom of the kettle body; A mixing box for mixing the paraldehyde mother liquor and the catalyst is disposed on the top of the feed pipe, a preheating and conveying assembly for heating the paraldehyde mother liquor and conveying it to the inside of the mixing box is disposed on the top of the mixing box, a catalyst conveying assembly for conveying the catalyst to the inside of the mixing box is disposed on the side wall of the mixing box, and a heating assembly for depolymerizing the mixed liquor flowing out of the mixing box is disposed inside the kettle body; The heating component includes a hollow liquid distribution plate disposed on the upper side of the inner wall of the kettle body and communicating with the feed pipe. A second hollow plate is provided on the inner wall of the kettle body, which is disposed below the hollow liquid distribution plate and communicates with the intake pipe. A first hollow plate is provided on the inner wall of the kettle body and communicates with the outlet pipe. A plurality of blanking pipes are provided at the bottom of the hollow liquid distribution plate, passing through the first hollow plate and the second hollow plate. A plurality of heating air holes are formed on the side walls of the first hollow plate and the second hollow plate close to each other, and are disposed between adjacent blanking pipes. A sealed heating tank is formed between the first hollow plate, the second hollow plate and the inner wall of the kettle body for heating and depolymerizing the mixed liquid flowing through the blanking pipes.
[0006] Further, a diversion pipe is inserted into the top of the mixing tank. The preheating and conveying component includes a storage tank disposed on the top of the diversion pipe. Support columns are provided between the bottom of the storage tank and the top of the kettle body. A stirring motor is provided on the top of the kettle body, and a stirring rod inside the storage tank is provided on the output shaft of the stirring motor. A heating plate is provided on the side wall of the mixing tank. A connecting pipe communicating with the diversion pipe is provided at the bottom of the storage tank, and a first valve is provided on the side wall of the connecting pipe.
[0007] Further, a conveying pipe connected to the paraldehyde mother liquor supply source is provided on the top of the storage tank, and a heat insulation plate is provided at the connection between the bottom of the stirring motor and the top of the storage tank.
[0008] Further, the catalyst conveying component includes a support plate provided on the side wall of the mixing tank. A storage cylinder is provided on the top of the support plate. A connecting pipe passes through the support plate at the bottom of the storage cylinder and communicates with the side wall of the mixing tank. A second delivery pump communicating with the connecting pipe is provided on the side wall of the mixing tank, and a second valve is provided on the side wall of the connecting pipe between the second delivery pump and the support plate.
[0009] Further, an installation pipe connected to the catalyst supply source is provided on the top of the storage cylinder.
[0010] Further, a first delivery pump is provided on the side wall of the connecting pipe below the first valve. A first sealing bearing is provided between the connecting pipe and the diversion pipe. A mixing component for mixing the paraldehyde mother liquor and the catalyst is provided inside the mixing tank.
[0011] Further, the mixing component includes a second gear disposed on the side wall of the diversion pipe and inside the mixing box. A mixing motor is provided at the top of the mixing box. A first gear meshing with the second gear is provided on the output shaft of the mixing motor. A hollow mixing disc is provided on the side wall of the diversion pipe and inside the inner wall of the mixing box. A second sealing bearing is provided at the connection between the diversion pipe and the hollow mixing disc. The side wall of the diversion pipe is provided with a plurality of mixing pipes disposed inside the hollow mixing disc and having a closed end at the end far from the diversion pipe. A plurality of material discharging holes are formed at the bottoms of the plurality of mixing pipes, and a plurality of liquid discharging holes are formed at the bottom of the hollow mixing disc.
[0012] Further, the bottom of the diversion pipe is a closed end. The lower side of the inner wall of the diversion pipe is flush with the lower end surface of the mixing pipe. The side wall of the diversion pipe is provided with a plurality of mixing columns disposed below the hollow mixing disc.
[0013] Further, a temperature sensor is provided on the side wall of the mixing box. A PLC controller is provided on the mixing box. An A / D converter is provided at the input end of the PLC controller. A D / A converter is provided at the output end of the PLC controller. The temperature sensor is electrically connected to the A / D converter. The first valve, the first delivery pump, the second valve, and the second delivery pump are respectively electrically connected to the D / A converter.
[0014] Further, a discharge valve is provided on the side wall of the discharge pipe. A support rod is provided between the top of the kettle body and the bottom of the mixing box.
[0015] The beneficial effects achieved by the present invention with the above structure are as follows: The present invention mixes paraldehyde mother liquor and a catalyst through the mixing box, facilitating the uniform mixing of the paraldehyde mother liquor and the catalyst, improving the uniformity of the depolymerization and dispersion of the paraldehyde mother liquor and the catalyst, and thus improving the depolymerization efficiency of the paraldehyde mother liquor; by introducing steam into the intake pipe, under the action of the heating air holes, the steam flows in the second hollow disc, the sealed heating groove, the first hollow disc, and the air outlet pipe. The sealed heating groove formed between the first hollow disc, the second hollow disc, and the inner wall of the kettle body heats the mixed liquid of the paraldehyde mother liquor and the catalyst flowing inside the plurality of material discharging pipes, which can reduce the floor area during the depolymerization of the paraldehyde mother liquor, and at the same time increase the heat exchange area and improve the heat exchange efficiency; meanwhile, the paraldehyde mother liquor is preheated through the preheating and conveying component, accelerating the temperature rise rate of the paraldehyde mother liquor inside the sealed heating groove and improving the depolymerization efficiency of the action between the paraldehyde mother liquor and the catalyst. Description of the Drawings
[0016] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present invention will become more obvious: Figure 1Stereogram of a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; Figure 2 According to an embodiment of the present invention Figure 1 Enlarged view of A in Figure 3 Front elevation sectional view of a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; Figure 4 According to an embodiment of the present invention Figure 3 Enlarged view of B in Figure 5 Stereogram of the connection part between the hollow mixing tray and the stirring pipe in a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; Figure 6 Stereogram of the connection part between the hollow mixing tray and the diversion pipe in a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; Figure 7 Stereogram of the heating component in a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; Figure 8 Top view of the first hollow tray in a depolymerization device for paraldehyde mother liquor according to an embodiment of the present invention; In the figure: 1, kettle body; 101, inlet gas pipe; 102, outlet gas pipe; 103, discharge pipe; 104, discharge valve; 105, support rod; 2, feed pipe; 3, feed valve; 4, mixing tank; 5, diversion pipe; 51, stirring column; 6, preheating and conveying component; 61, support column; 62, storage tank; 63, heating plate; 64, conveying pipe; 65, stirring motor; 651, stirring rod; 66, temperature sensor; 67, first valve; 68, connecting pipe; 69, first delivery pump; 610, first sealing bearing; 7, catalyst delivery component; 71, installation pipe; 72, storage cylinder; 73, support plate; 74, second valve; 75, connecting pipe; 76, second delivery pump; 8, heating component; 81, first hollow tray; 82, blanking pipe; 83, sealed heating tank; 84, second hollow tray; 85, hollow liquid separation tray; 86, heating air holes; 9, mixing component; 91, mixing motor; 92, first gear; 93, second gear; 94, hollow mixing tray; 941, liquid outlet hole; 95, stirring pipe; 951, blanking hole; 96, second sealing bearing. Detailed implementation manners
[0017] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.
[0018] Such as Figure 1 , Figure 7 and Figure 8As shown in the figure, the present invention provides a technical solution: a depolymerization device for paraldehyde mother liquor, comprising: A kettle body 1, on the side wall of the kettle body 1, an air inlet pipe 101 and an air outlet pipe 102 for transporting steam are respectively arranged. At the top of the kettle body 1, a feed pipe 2 is arranged. On the side wall of the feed pipe 2, a feed valve 3 is arranged. At the bottom of the kettle body 1, a discharge pipe 103 is arranged; At the top of the feed pipe 2, a mixing box 4 for mixing paraldehyde mother liquor and a catalyst is arranged. At the top of the mixing box 4, a preheating and conveying assembly 6 for heating the paraldehyde mother liquor and conveying it into the interior of the mixing box 4 is arranged. On the side wall of the mixing box 4, a catalyst conveying assembly 7 for conveying the catalyst into the interior of the mixing box 4 is arranged. Inside the kettle body 1, a heating assembly 8 for depolymerizing the mixed liquid flowing out of the mixing box 4 is arranged; The heating assembly 8 includes a hollow liquid distribution plate 85 arranged on the upper side of the inner wall of the kettle body 1 and communicated with the feed pipe 2. On the inner wall of the kettle body 1, a second hollow plate 84 is arranged below the hollow liquid distribution plate 85 and communicated with the air inlet pipe 101. On the inner wall of the kettle body 1, a first hollow plate 81 is arranged and communicated with the air outlet pipe 102. At the bottom of the hollow liquid distribution plate 85, a plurality of blanking pipes 82 penetrating through the first hollow plate 81 and the second hollow plate 84 are arranged. On the side walls of the first hollow plate 81 and the second hollow plate 84 close to each other, a plurality of heating air holes 86 are arranged between adjacent blanking pipes 82. A sealed heating tank 83 for heating and depolymerizing the mixed liquid flowing through the blanking pipes 82 is formed between the first hollow plate 81, the second hollow plate 84 and the inner wall of the kettle body 1. This design mixes the paraldehyde mother liquor and the catalyst through the mixing box 4, which is convenient for the uniform mixing of the paraldehyde mother liquor and the catalyst, improves the uniformity of the depolymerization and dispersion of the paraldehyde mother liquor, and thus improves the depolymerization efficiency of the paraldehyde mother liquor; by introducing steam into the air inlet pipe 101, under the action of the heating air holes 86, the steam flows in the second hollow plate 84, the sealed heating tank 83, the first hollow plate 81 and the air outlet pipe 102. The sealed heating tank 83 formed between the first hollow plate 81, the second hollow plate 84 and the inner wall of the kettle body 1 heats the mixed liquid of the paraldehyde mother liquor and the catalyst flowing through the plurality of blanking pipes 82, which can reduce the floor area during the depolymerization of the paraldehyde mother liquor, and at the same time increase the heat exchange area and improve the heat exchange efficiency; at the same time, the paraldehyde mother liquor is preheated by the preheating and conveying assembly 6 to accelerate the heating rate of the paraldehyde mother liquor inside the sealed heating tank 83 and improve the depolymerization efficiency of the action between the paraldehyde mother liquor and the catalyst. The blanking pipes 82 are hermetically connected to the bottom of the hollow liquid distribution plate 85, the first hollow plate 81 and the second hollow plate 84 respectively.
[0019] Refer to Figure 1 、 Figure 2 、 Figure 3 , a diversion pipe 5 is arranged at the top of the mixing box 4 and inserted into its interior; The preheating and conveying assembly 6 includes a storage tank 62 arranged on the top of the diversion pipe 5. A support column 61 is arranged between the bottom of the storage tank 62 and the top of the kettle body 1. A stirring motor 65 is arranged on the top of the kettle body 1. A stirring rod 651 inside the storage tank 62 is arranged on the output shaft of the stirring motor 65. A heating plate 63 is arranged on the side wall of the mixing tank 4. A connecting pipe 68 communicating with the diversion pipe 5 is arranged at the bottom of the storage tank 62. A first valve 67 is arranged on the side wall of the connecting pipe 68. This design facilitates the placement of paraldehyde mother liquor through the storage tank 62, then heats the paraldehyde mother liquor placed inside the storage tank 62 through the heating plate 63. At the same time, the stirring motor 65 operates to drive the stirring rod 651 to rotate and stir the paraldehyde mother liquor, improving the uniformity of the depolymerization and dispersion of the paraldehyde mother liquor and the catalyst, and facilitating the preheating operation of the paraldehyde mother liquor. After heating, the first valve 67 is opened to enable the heated paraldehyde mother liquor to flow into the mixing tank 4 through the connecting pipe 68 and the diversion pipe 5. Among them, the mixing tank 4 is circular and the heating plate 63 is annular, thereby improving the uniformity of heating the paraldehyde mother liquor.
[0020] Refer to Figure 1 and Figure 3 , a conveying pipe 64 connected to the paraldehyde mother liquor supply source is arranged on the top of the storage tank 62. A heat insulation plate is arranged at the connection between the bottom of the stirring motor 65 and the top of the storage tank 62. This design is connected to the paraldehyde mother liquor supply source through the conveying pipe 64, facilitating the conveyance of the paraldehyde mother liquor into the storage tank 62 through the paraldehyde mother liquor supply source. Among them, the paraldehyde mother liquor supply source is a paraldehyde mother liquor storage tank connected through a pump body, and the pump body is connected to the conveying pipe 64, thereby facilitating the addition of the paraldehyde mother liquor into the storage tank 62.
[0021] Refer to Figure 1 , the catalyst conveying assembly 7 includes a support plate 73 arranged on the side wall of the mixing tank 4. A storage cylinder 72 is arranged on the top of the support plate 73. A connecting pipe 75 penetrating through the support plate 73 and communicating with the side wall of the mixing tank 4 is arranged at the bottom of the storage cylinder 72. A second conveying pump 76 communicating with the connecting pipe 75 is arranged on the side wall of the mixing tank 4. A second valve 74 placed between the second conveying pump 76 and the support plate 73 is arranged on the side wall of the connecting pipe 75. This design facilitates the storage of the prepared catalyst through the storage cylinder 72. By opening the second valve 74, the catalyst stored inside the storage cylinder 72 is conveyed into the mixing tank 4 through the connecting pipe 75. An installation pipe 71 connected to the catalyst supply source is arranged on the top of the storage cylinder 72. This design is connected to the catalyst supply source through the installation pipe 71, facilitating the conveyance of the prepared catalyst into the storage cylinder 72. Among them, the catalyst supply source is connected to the installation pipe 71 through a pump body on a depolymerization kettle with a prepared depolymerization catalyst, facilitating the conveyance of the prepared catalyst into the storage cylinder 72.
[0022] Refer to Figure 3 andFigure 4 , a first delivery pump 69 is provided on the side wall of the connecting pipe 68 below the first valve 67. A first sealing bearing 610 is provided between the connecting pipe 68 and the diversion pipe 5. A mixing component 9 for mixing paraldehyde mother liquor and catalyst is provided inside the mixing tank 4. This design facilitates the delivery of the paraldehyde mother liquor placed inside the storage tank 62 to the inside of the mixing tank 4 through the first delivery pump 69 and the first sealing bearing 610.
[0023] Refer to Figure 3 and Figure 4 , the mixing component 9 includes a second gear 93 provided on the side wall of the diversion pipe 5 and inside the mixing tank 4. A mixing motor 91 is provided on the top of the mixing tank 4. A first gear 92 meshing with the second gear 93 is provided on the output shaft of the mixing motor 91. A hollow mixing disc 94 is provided on the side wall of the diversion pipe 5 and on the inner wall of the mixing tank 4. A second sealing bearing 96 is provided at the connection between the diversion pipe 5 and the hollow mixing disc 94. A plurality of stirring pipes 95 with a closed end at the end far from the diversion pipe 5 are provided on the side wall of the diversion pipe 5 and inside the hollow mixing disc 94. A plurality of material discharge holes 951 are opened at the bottom of each of the plurality of stirring pipes 95. A plurality of liquid discharge holes 941 are opened at the bottom of the hollow mixing disc 94. This design drives the first gear 92 to rotate by the operation of the mixing motor 91 in the mixing component 9. The rotation of the first gear 92 drives the second gear 93 to rotate. The rotation of the second gear 93 drives the diversion pipe 5 to rotate. The rotation of the diversion pipe 5 drives the stirring pipes 95 to rotate inside the hollow mixing disc 94. The paraldehyde mother liquor inside the diversion pipe 5 flows into the stirring pipes 95 and flows out from the material discharge holes 951 to the inside of the hollow mixing disc 94. At the same time, the catalyst flows into the inside of the hollow mixing disc 94 from the connecting pipe 75, so that the catalyst and the paraldehyde mother liquor are initially mixed inside the hollow mixing disc 94; the mixed liquid is evenly dispersed into the inside of the mixing tank 4 through the plurality of liquid discharge holes 941 at the bottom of the hollow mixing disc 94, which facilitates the mixing of the paraldehyde mother liquor and the catalyst, improves the uniformity of the dispersion of the paraldehyde mother liquor and the catalyst, and further improves the depolymerization efficiency of the subsequent mixed liquid in the sealed heating tank 83 through the feeding pipe 82.
[0024] Refer to Figure 4 , Figure 5 and Figure 6 , the bottom of the diversion pipe 5 is a closed end. The lower side of the inner wall of the diversion pipe 5 is flush with the lower end surface of the stirring pipe 95. A plurality of stirring columns 51 are provided on the side wall of the diversion pipe 5 and below the hollow mixing disc 94. This design facilitates the secondary stirring and mixing of the paraldehyde mother liquor and the catalyst through the stirring columns 51 on the diversion pipe 5, and further improves the uniformity of dispersion.
[0025] Refer to Figure 3, a temperature sensor 66 is provided on the side wall of the mixing tank 4, a PLC controller is provided on the mixing tank 4, an A / D converter is provided at the input end of the PLC controller, a D / A converter is provided at the output end of the PLC controller, the temperature sensor 66 is electrically connected to the A / D converter, and the first valve 67, the first delivery pump 69, the second valve 74 and the second delivery pump 76 are respectively electrically connected to the D / A converter. This design facilitates the detection of the temperature of the paraldehyde mother liquor placed inside the mixing tank 4 by using the temperature sensor 66. When the detected temperature reaches the set value, a signal is sent to the PLC controller to make the first delivery pump 69 work and the first valve 67 open, and the paraldehyde mother liquor is sent to the inside of the hollow mixing tray 94 through the diversion pipe 5. At the same time, the second delivery pump 76 is made to work and the second valve 74 is opened to send the catalyst to the inside of the hollow mixing tray 94 through the connecting pipe 75, thus facilitating the transportation of the paraldehyde mother liquor and the catalyst. The first liquid level sensor and the second liquid level sensor can be respectively provided at the bottoms of the storage tank 62 and the storage cylinder 72 and are respectively electrically connected to the D / A converter of the PLC controller. When the first liquid level sensor is lower than the set value, a signal is sent to the PLC controller to make the first delivery pump 69 stop working and the first valve 67 close. Similarly, when the second liquid level sensor is lower than the set value, a signal is sent to the PLC controller to make the second delivery pump 76 stop working and the second valve 74 close. When the first liquid level sensor and the second liquid level sensor detect that the liquid level is higher than or equal to the set value, the PLC controller makes the first delivery pump 69 remain stopped, the first valve 67 remain closed, the second delivery pump 76 remain stopped, and the second valve 74 remain closed, thus facilitating the continuous transportation and storage of the paraldehyde mother liquor in the storage tank 62 and the continuous transportation and storage of the prepared catalyst inside the storage cylinder 72.
[0026] Refer to Figure 1 , a discharge valve 104 is provided on the side wall of the discharge pipe 103, and a support rod 105 is provided between the top of the kettle body 1 and the bottom of the mixing tank 4, which improves the rationality of this design.
[0027] Refer to Figures 1 - 8, as an embodiment of the present invention: when it is necessary to depolymerize paraldehyde, a configured catalyst is transported into the interior of the storage cylinder 72 through a catalyst supply source, and at the same time, paraldehyde mother liquor is transported into the interior of the storage tank 62 through a paraldehyde mother liquor supply source. After the transportation of the paraldehyde mother liquor is completed, the stirring motor 65 operates to drive the stirring rod 651 to rotate, stirring the paraldehyde mother liquor; at the same time, the heating plate 63 heats the paraldehyde mother liquor stored in the storage tank 62, thereby accelerating the heating rate of the paraldehyde mother liquor during depolymerization, and further improving the depolymerization efficiency of the interaction between the paraldehyde mother liquor and the catalyst; under the action of the rotation of the stirring rod 651, the uniformity of heating the paraldehyde mother liquor is improved. When the temperature sensor 66 detects that the temperature of the paraldehyde mother liquor reaches the set value, a signal is sent to the PLC controller, causing the first delivery pump 69 to operate and the first valve 67 to open, and the paraldehyde mother liquor is sent into the interior of the hollow mixing tray 94 through the connecting pipe 68, the diversion pipe 5, the stirring pipe 95, and the feeding hole 951. At this time, under the action of the mixing motor 91 operating to drive the first gear 92 and the second gear 93 to rotate, the diversion pipe 5 rotates, the diversion pipe 5 drives the stirring pipe 95 to rotate, and the rotation of the stirring pipe 95 causes the paraldehyde mother liquor inside it to be evenly dispersed from multiple feeding holes 951 into the interior of the hollow mixing tray 94. The PLC controller simultaneously causes the second delivery pump 76 to operate and the second valve 74 to open, and the catalyst is sent into the interior of the hollow mixing tray 94 through the connecting pipe 75. Under the action of the stirring pipe 95, the catalyst and the paraldehyde mother liquor are initially mixed inside the hollow mixing tray 94; the mixed liquid formed by the mixed paraldehyde mother liquor and the catalyst flows out evenly from multiple liquid outlet holes 941 into the mixing tank 4, and under the action of the diversion pipe 5 driving the stirring column 51 to rotate, the mixed liquid flowing out from the liquid outlet holes 941 is stirred, further promoting the uniform mixing of the mixed liquid and improving the uniformity of the depolymerization and dispersion of the paraldehyde mother liquor and the catalyst, thereby improving the depolymerization efficiency of the paraldehyde mother liquor.
[0028] When the paraldehyde mother liquor and the catalyst are fully mixed inside the mixing tank 4, the feeding valve 3 is opened, and the mixed liquid flows into the interior of the hollow liquid distribution tray 85 inside the kettle body 1 through the feeding pipe 2. Under the action of multiple feeding pipes 82 at the bottom of the hollow liquid distribution tray 85, the mixed liquid is evenly dispersed. At the same time, steam is introduced into the feeding pipe 2 and enters the second hollow tray 84, and enters the sealed heating tank 83, the first hollow tray 81, and the air outlet pipe 102 for flow under the action of the heating air holes 86. Thus, the sealed heating tank 83 formed between the first hollow tray 81, the second hollow tray 84, and the inner wall of the kettle body 1 heats the mixed liquid of the paraldehyde mother liquor and the catalyst flowing through multiple feeding pipes 82, thereby heating and depolymerizing the paraldehyde mother liquor. The depolymerized acetaldehyde liquid then flows out through the discharge pipe 103, thereby reducing the floor area during the depolymerization of the paraldehyde mother liquor, increasing the heat exchange area, and improving the heat exchange efficiency. The depolymerization of the paraldehyde mother liquor by the action of the catalyst is a prior art.
[0029] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A depolymerization device for paraldehyde mother liquor, comprising: A kettle body (1), wherein the side walls of the kettle body (1) are respectively provided with an air inlet pipe (101) and an air outlet pipe (102) for conveying steam, a feed pipe (2) is provided at the top of the kettle body (1), and a discharge pipe (103) is provided at the bottom of the kettle body (1); The invention is characterized in that a mixing box (4) for mixing the paraldehyde mother liquor and the catalyst is arranged on the top of the feed pipe (2); a preheating and conveying component (6) for heating the paraldehyde mother liquor and conveying it to the inside of the mixing box (4) is arranged on the top of the mixing box (4); a catalyst conveying component (7) for conveying the catalyst to the inside of the mixing box (4) is arranged on the side wall of the mixing box (4); and a heating component (8) for depolymerizing the mixed liquor flowing out of the mixing box (4) is arranged inside the kettle body (1); The heating assembly (8) comprises a hollow liquid separation plate (85) arranged on the upper side of the inner wall of the kettle body (1) and connected to the feed pipe (2); the inner wall of the kettle body (1) is provided with a second hollow plate (84) arranged below the hollow liquid separation plate (85) and connected to the air inlet pipe (101); the inner wall of the kettle body (1) is provided with a first hollow plate (81) connected to the air outlet pipe (102); the bottom of the hollow liquid separation plate (85) is provided with a plurality of holes penetrating the first hollow plate (81). The hollow disk (81) and the discharge pipe (82) of the second hollow disk (84) are provided with a plurality of heating air holes (86) disposed between adjacent discharge pipes (82) on one side wall of the first hollow disk (81) and the second hollow disk (84) that are close to each other, and a sealed heating tank (83) for heating and depolymerizing the mixed liquid guided by the discharge pipe (82) is formed between the first hollow disk (81), the second hollow disk (84) and the inner wall of the kettle body (1).
2. A depolymerization device for paraldehyde mother liquor according to claim 1, characterized in that: The top of the mixing box (4) is provided with a flow guide pipe (5) inserted into the interior thereof; The preheating and conveying assembly (6) comprises a storage box (62) arranged at the top of the guide tube (5); a support column (61) is arranged between the bottom of the storage box (62) and the top of the kettle body (1); a stirring motor (65) is arranged at the top of the kettle body (1); a stirring rod (651) inside the storage box (62) is arranged on the output shaft of the stirring motor (65); a heating plate (63) is arranged on the side wall of the mixing box (4); a connecting pipe (68) connected to the guide tube (5) is arranged at the bottom of the storage box (62); and a first valve (67) is arranged on the side wall of the connecting pipe (68).
3. A depolymerization device for paraldehyde mother liquor according to claim 2, characterized in that: A delivery pipe (64) connected to a paraldehyde mother liquid supply source is provided on the top of the storage box (62), and a heat insulation board is provided at the connection between the bottom of the stirring motor (65) and the top of the storage box (62).
4. A depolymerization device for paraldehyde mother liquor according to claim 2, characterized in that: The catalyst delivery assembly (7) comprises a support plate (73) arranged on the side wall of the mixing box (4); a storage cylinder (72) is arranged on the top of the support plate (73); a connecting pipe (75) is arranged at the bottom of the storage cylinder (72) and passes through the support plate (73) and is connected to the side wall of the mixing box (4); a second delivery pump (76) connected to the connecting pipe (75) is arranged on the side wall of the mixing box (4); and a second valve (74) is arranged on the side wall of the connecting pipe (75) and is placed between the second delivery pump (76) and the support plate (73).
5. A depolymerization device for paraldehyde mother liquor according to claim 4, characterized in that: The top of the storage cylinder (72) is provided with a mounting pipe (71) connected to a catalyst supply source.
6. A depolymerization device for paraldehyde mother liquor according to claim 4, characterized in that: A first delivery pump (69) disposed below the first valve (67) is arranged on the side wall of the connecting pipe (68), a first sealing bearing (610) is arranged between the connecting pipe (68) and the flow guide pipe (5), and a mixing component (9) for mixing the triacetaldehyde mother liquor with the catalyst is arranged inside the mixing box (4).
7. A depolymerization device for paraldehyde mother liquor according to claim 6, characterized in that: The mixing assembly (9) comprises a second gear (93) arranged on the side wall of the flow guide tube (5) and placed inside the mixing box (4); a mixing motor (91) is arranged on the top of the mixing box (4); a first gear (92) meshing with the second gear (93) is arranged on the output shaft of the mixing motor (91); a hollow mixing disk (94) arranged on the inner wall of the mixing box (4) is arranged on the side wall of the flow guide tube (5); a second sealed bearing (96) is arranged at the connection between the flow guide tube (5) and the hollow mixing disk (94); a plurality of stirring tubes (95) are arranged on the side wall of the flow guide tube (5), which are placed inside the hollow mixing disk (94) and have one end away from the flow guide tube (5) as a closed end; a plurality of material discharge holes (951) are provided at the bottom of each of the plurality of stirring tubes (95); and a plurality of liquid outlet holes (941) are provided at the bottom of the hollow mixing disk (94).
8. The depolymerization device for paraldehyde mother liquor according to claim 7, characterized in that: The bottom of the flow guide tube (5) is a closed end, the lower side of the inner wall of the flow guide tube (5) is flush with the lower end surface of the stirring tube (95), and the side wall of the flow guide tube (5) is provided with a plurality of stirring columns (51) placed below the hollow mixing plate (94).
9. The depolymerization device for paraldehyde mother liquor according to claim 6, characterized in that: A temperature sensor (66) is provided on a side wall of the mixing box (4); a PLC controller is provided on the mixing box (4); an A / D converter is provided at an input end of the PLC controller; a D / A converter is provided at an output end of the PLC controller; the temperature sensor (66) is electrically connected to the A / D converter; and the first valve (67), the first delivery pump (69), the second valve (74) and the second delivery pump (76) are electrically connected to the D / A converter, respectively.
10. The depolymerization device for paraldehyde mother liquor according to claim 1, characterized in that: A discharge valve (104) is provided on the side wall of the discharge pipe (103), and a support rod (105) is provided between the top of the kettle body (1) and the bottom of the mixing box (4).