A high temperature drying oven for dimethyl carbonate production

Abstract

The present invention relates to the technical field of drying equipment, and proposes a high-temperature drying box for dimethyl carbonate production, comprising a main drying box, the main drying box having a drying chamber; a buffer box arranged on the top of the main drying box, the buffer box having a buffer chamber, and the buffer chamber having a first outlet; one end of a sliding tube is slidably arranged at the first outlet, and the other end passes through the main drying box and is located outside the main drying box. After the sliding tube slides, the drying chamber and the buffer chamber are connected or disconnected through the first outlet. Through the above technical solution, the problem of low drying efficiency when recovering sodium methoxide in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, and in particular to a high-temperature drying box for producing dimethyl carbonate. Background Art

[0002] Dimethyl carbonate is an important organic compound that can be used as a methylating agent and carbonating agent in the production of carbonates, carbamates, ether compounds, etc. For example, in the production of polycarbonate, dimethyl carbonate is an important raw material, and polycarbonate resin is widely used in the fields of electronics, automobiles, and construction. It can also replace highly toxic phosgene, methyl chloroformate, dimethyl sulfate, etc. as a methylating agent or carbonylating agent to improve the safety of production operations and reduce environmental pollution. At the same time, it has excellent solubility properties and can be used as a low-toxic solvent in the coating industry, the pharmaceutical industry, and the precision mechanical cleaning of electronic components.

[0003] In the production process of dimethyl carbonate, oxidative carbonylation reaction is usually used for environmental protection. Sodium methoxide is generally used as a catalyst in the preparation. Sodium methoxide can be recycled after the reaction. When recycling sodium methoxide, it needs to be dried, but the common drying oven has a low utilization rate of the heat generated by the heat source and low drying efficiency. Summary of the invention

[0004] The invention provides a high-temperature drying box for producing dimethyl carbonate, which solves the problem of low drying efficiency when recovering sodium methoxide in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A high-temperature drying oven for producing dimethyl carbonate, comprising:

[0007] A main drying box, the main drying box having a drying chamber;

[0008] A cache box, the cache box is arranged on the top of the main drying box, the cache box has a cache cavity, and the cache cavity has a first outlet;

[0009] A sliding tube, one end of which is slidably arranged at the first outlet, and the other end of which passes through the main drying box and is located outside the main drying box. After the sliding tube slides, the drying chamber and the cache chamber are connected or disconnected through the first outlet.

[0010] Optionally, it also includes:

[0011] A partition is arranged in the sliding tube, and the partition divides the sliding tube into a preheating chamber and a feeding chamber. The feeding chamber has a second outlet. After the sliding tube slides so that the second outlet is located in the buffer chamber, the feeding chamber is connected with the buffer chamber.

[0012] Optionally, the bottom of the cache cavity has a first conical guide surface, the first outlet is located at the bottom of the first conical guide surface, and the bottom of the second outlet is not higher than the bottom of the feed cavity.

[0013] Optionally, it also includes:

[0014] An exhaust pipe, wherein the exhaust pipe is provided in plurality, and the cache chamber and the drying chamber are both connected to the exhaust pipe;

[0015] A one-way valve is arranged in the exhaust pipe.

[0016] Optionally, it also includes:

[0017] A stirring shaft, rotatably disposed in the main drying box, wherein the stirring shaft has an air inlet passage;

[0018] The first stirring rod has at least one first stirring rod, one end of the first stirring rod is arranged on the stirring shaft, the first stirring rod has a first exhaust channel, and both ends of the first exhaust channel are respectively connected to the air inlet channel and the drying chamber.

[0019] Optionally, the first stirring rod is tilted downward, further comprising:

[0020] The second stirring rod has at least one second stirring rod, the second stirring rod is arranged on the stirring shaft with an upward tilt, the second stirring rod has a second exhaust channel, and the two ends of the second exhaust channel are respectively connected to the air inlet channel and the drying chamber.

[0021] Optionally, it also includes:

[0022] A stirring blade is provided on the first stirring rod or the second stirring rod.

[0023] Optionally, the stirring shaft is rotatably and slidably arranged in the main drying box, the drying chamber has a second conical guide surface, the bottom of the second conical guide surface has a third outlet, and further includes:

[0024] A blocking block is arranged at one end of the stirring shaft close to the third outlet. After the stirring shaft slides, the blocking block blocks or cancels the blocking of the third outlet.

[0025] Optionally, the blocking block has a third conical guide surface at one end away from the third outlet.

[0026] Optionally, it also includes:

[0027] A material storage box, the material storage box having an inlet, the inlet being used to abut against the third outlet;

[0028] A sliding plate is slidably arranged in the material storage box, and the sliding plate has a connecting port. After the sliding plate slides, the connecting port is connected to or disconnected from the inlet.

[0029] The working principle and beneficial effects of the present invention are:

[0030] In the present invention, in order to solve the problem of low drying efficiency when recovering sodium methoxide in the related art, a cache box is set in the main drying box. By setting the cache box, the material to be dried can be temporarily stored, which is convenient for continuous production and the material can be pre-dried by using the heat in the drying chamber. The cache box is installed on the top of the main drying box and fixed by welding or other means. During the drying process of the main drying box, sodium methoxide can be placed in the cache box for pre-drying, and the heat in the main drying box can be transferred to the cache box, thereby improving the heat utilization rate. The sliding tube is made of high temperature resistant material, one end of which is slidably set at the first outlet of the cache box, and the other end passes through the top of the main drying box, and can be slid by manual or automatic control.

[0031] The working principle of the present invention is that after the catalyst sodium methoxide in the main drying box is dried, the sliding tube slides in a direction away from the first outlet, at which time the buffer chamber is connected to the drying chamber, while the buffer chamber is not connected to the outside world, and the pre-dried sodium methoxide in the buffer chamber can enter the drying chamber to complete drying while being isolated from the outside air. After the sliding tube slides in the reverse direction, the first outlet is closed by the sliding tube, and the buffer chamber and the drying chamber are no longer connected. At this time, sodium methoxide can continue to be added to the buffer chamber for pre-drying, thereby improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the cache box, sliding tube and partition of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the stirring shaft, the first stirring rod, the second stirring rod and the stirring blade of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the cache box and the sliding plate of the present invention;

[0038] Figure 6It is a schematic diagram of the partial structure of the cache box and sliding plate of the present invention.

[0039] In the figure: 1. main drying box, 11. drying chamber, 2. cache box, 21. cache chamber, 211. first outlet, 3. sliding tube, 4. partition, 31. preheating chamber, 32. feeding chamber, 321. second outlet, 212. first conical guide surface, 5. exhaust pipe, 61. stirring shaft, 611. air inlet channel, 62. first stirring rod, 621. first exhaust channel, 63. second stirring rod, 631. second exhaust channel, 64. stirring blade, 12. second conical guide surface, 121. third outlet, 7. blocking block, 71. third conical guide surface, 8. storage box, 81. inlet, 9. sliding plate, 91. connecting port. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference Figure 1 to Figure 6, which is the first embodiment of the present invention, proposes a high-temperature drying box for dimethyl carbonate production, including a main drying box 1, the main drying box 1 has a drying chamber 11; a cache box 2 is arranged on the top of the main drying box 1, the cache box 2 has a cache chamber 21, and the cache chamber 21 has a first outlet 211; one end of a sliding tube 3 is slidably arranged at the first outlet 211, and the other end passes through the main drying box 1 and is located outside the main drying box 1. After the sliding tube 3 slides, the drying chamber 11 and the cache chamber 21 are connected or disconnected through the first outlet 211.

[0045] In this embodiment, the drying chamber 11 inside the main drying box 1 can accommodate a large amount of sodium methoxide catalyst for dimethyl carbonate production to be dried. The cache box 2 is installed on the top of the main drying box 1 and fixed by welding or other means. During the drying process of the main drying box 1, sodium methoxide can be placed in the cache box 2 for pre-drying, and the heat in the main drying box 1 can be transferred to the cache box 2, thereby improving the heat utilization rate. The sliding tube 3 is made of high temperature resistant material, one end of which is slidably arranged at the first outlet 211 of the cache box 2, and the other end passes through the top of the main drying box 1, and can be slid by manual or automatic control. After the catalyst sodium methoxide in the main drying box 1 is dried, the sliding tube 3 slides in the direction away from the first outlet 211. At this time, the cache chamber 21 is connected to the drying chamber 11, and the cache chamber 21 is not connected to the outside world. The pre-dried sodium methoxide in the cache chamber 21 can enter the drying chamber 11 to complete the drying while being isolated from the outside air. After the sliding tube 3 slides in the reverse direction, the first outlet 211 is closed by the sliding tube 3, and the buffer chamber 21 and the drying chamber 11 are no longer connected. At this time, sodium methoxide can continue to be added to the buffer chamber 21 for pre-drying, thereby improving the drying efficiency.

[0046] By setting up the buffer box 2, the materials to be dried can be temporarily stored, which is convenient for continuous production. Since sodium methoxide is very sensitive to moisture and is easily decomposed when it comes into contact with water, by setting up the sliding tube 3, the connection state between the drying chamber 11 and the buffer chamber 21 can be flexibly controlled. When feeding is required, they are connected, and when feeding is not required, the connection is cancelled, which can effectively control the drying process and improve production efficiency. The high-temperature drying oven proposed in this embodiment can not only dry the catalyst sodium methoxide required for the production of dimethyl carbonate, but also dry other substances according to production needs after cleaning.

[0047] Furthermore, it also includes a partition 4, which is arranged in the sliding tube 3. The partition 4 divides the sliding tube 3 into a preheating chamber 31 and a feed chamber 32. The feed chamber 32 has a second outlet 321. After the sliding tube 3 slides so that the second outlet 321 is located in the buffer chamber 21, the feed chamber 32 is connected with the buffer chamber 21.

[0048] In this embodiment, a partition 4 is installed inside the sliding tube 3, and the partition 4 is tightly combined with the sliding tube 3 to divide it into a preheating chamber 31 and a feeding chamber 32. When the sliding tube 3 slides to a specific position, the second outlet 321 is just located in the buffer chamber 21, so that the feeding chamber 32 is connected to the buffer chamber 21. However, since the sliding direction of the sliding tube 3 is close to the first outlet 211, the first outlet 211 is closed by the sliding tube 3, and the buffer chamber 21 is not connected to the drying chamber 11. At this time, the drying chamber 11 is in a closed state, and the process of sodium methoxide entering the buffer chamber 21 through the feeding chamber 32 and the second outlet 321 will not affect the drying of sodium methoxide in the main drying box 1, so that the feeding process and the drying process do not affect each other, and at the same time, the heat in the main drying box 1 can be used to pre-dry the sodium methoxide in the buffer chamber 21. The existence of the preheating chamber 31 can improve the efficiency of heat exchange between the buffer chamber 21 and the drying chamber 11. The setting of the partition 4 realizes the preheating of the material and the feeding in stages. Feeding in stages allows for better control of the drying process and avoids inadequate drying due to excessive material.

[0049] Furthermore, the bottom of the cache chamber 21 has a first conical guide surface 212 , the first outlet 211 is located at the bottom of the first conical guide surface 212 , and the bottom of the second outlet 321 is not higher than the bottom of the feed chamber 32 .

[0050] In this embodiment, the first conical guide surface 212 at the bottom of the buffer chamber 21 is made of a high temperature resistant material and has a smooth surface. The first outlet 211 is located at the bottom center of the conical guide surface, which helps the material to flow quickly to the first outlet 211, improves the feeding efficiency of sodium methoxide into the drying chamber 11, and the conical first conical guide surface 212 can prevent the pre-dried sodium methoxide from remaining in the buffer chamber 21 when passing through the first outlet 211. The bottom of the second outlet 321 is flush with the bottom of the feed chamber 32, ensuring that the material can flow out smoothly, reducing the accumulation of sodium methoxide in the feed chamber 32, and facilitating the cleaning of the feed chamber 32.

[0051] Furthermore, it also includes an exhaust pipe 5 , of which there are multiple exhaust pipes 5 , and the cache chamber 21 and the drying chamber 11 are both connected to the exhaust pipe 5 ; a one-way valve is arranged in the exhaust pipe 5 .

[0052] In this embodiment, multiple exhaust pipes 5 are provided, which are respectively connected to the buffer chamber 21 and the drying chamber 11 by welding or the like. A one-way valve is installed in each exhaust pipe 5, which allows gas to be discharged from the chamber and prevents external gas from entering. Multiple exhaust pipes 5 can timely discharge the gas generated during the drying process and keep the pressure in the drying chamber 11 and the buffer chamber 21 stable. The setting of the one-way valve can prevent external air from entering, ensure the purity of the drying environment, and improve the drying quality.

[0053] Furthermore, it also includes a stirring shaft 61, which is rotatably arranged in the main drying box 1, and the stirring shaft 61 has an air inlet channel 611; there is at least one first stirring rod 62, one end of the first stirring rod 62 is arranged on the stirring shaft 61, and the first stirring rod 62 has a first exhaust channel 621, and both ends of the first exhaust channel 621 are respectively connected to the air inlet channel 611 and the drying chamber 11.

[0054] In this embodiment, the stirring shaft 61 is installed in the main drying box 1 through a bearing and can be driven to rotate by a motor. The stirring shaft 61 is internally processed with an air inlet channel 611, which is connected to an external hot air source. The first stirring rod 62 is fixed to the stirring shaft 61 by welding or the like, and the first stirring rod 62 is internally processed with a first exhaust channel 621. The hot air generated by the external air source can enter the drying chamber 11 through the air inlet channel 611 and the first exhaust channel 621 to dry the sodium methoxide in the drying chamber 11. In order to maintain the stability of the internal pressure, the hot air is discharged from the exhaust pipe 5 after passing through the drying chamber 11. Since the exhausted gas still has a certain amount of heat, the exhausted gas can be connected to an external air source and recycled after being processed by the external air source. The design of the stirring shaft 61 and the first stirring rod 62 can stir the material during the drying process, so that the material is fully exposed to the hot air and the drying efficiency is improved. The setting of the first exhaust channel 621 can evenly distribute the hot air in the drying chamber 11 to ensure the uniformity of drying.

[0055] Furthermore, the first stirring rod 62 is tilted downward and also includes a second stirring rod 63. The second stirring rod 63 has at least one second stirring rod 63, which is tilted upward on the stirring shaft 61. The second stirring rod 63 has a second exhaust channel 631, and both ends of the second exhaust channel 631 are respectively connected to the air inlet channel 611 and the drying chamber 11.

[0056] In this embodiment, the second stirring rod 63 is also fixed on the stirring shaft 61 by welding or other means, and is spaced apart from the first stirring rod 62. The second stirring rod 63 is tilted upward at a certain angle, and a second exhaust channel 631 is processed inside, so that hot air can also enter the second exhaust channel 631 from the air inlet channel 611 and then enter the drying chamber 11. The downward tilted first stirring rod 62 and the upward tilted second stirring rod 63 cooperate with each other to further enhance the stirring effect, making the movement of the material in the drying chamber 11 more complicated, and the hot air can also be evenly distributed in the drying chamber 11, thereby improving the uniformity of drying. Avoid material accumulation during the stirring process to ensure the drying effect.

[0057] Furthermore, a stirring blade 64 is included, and the stirring blade 64 is disposed on the first stirring rod 62 or the second stirring rod 63 .

[0058] In this embodiment, the stirring blade 64 is made of high temperature resistant and corrosion resistant material and is fixed on the first stirring rod 62 and the second stirring rod 63. The setting of the stirring blade 64 increases the intensity and range of stirring, so that the material is more fully mixed in the drying chamber 11, thereby improving the drying efficiency and quality.

[0059] Furthermore, the stirring shaft 61 is rotatably and slidably arranged in the main drying box 1, the drying chamber 11 has a second conical guide surface 12, and the bottom of the second conical guide surface 12 has a third outlet 121, and also includes a blocking block 7, which is arranged at one end of the stirring shaft 61 close to the third outlet 121. After the stirring shaft 61 slides, the blocking block 7 closes or cancels the third outlet 121.

[0060] In this embodiment, the stirring shaft 61 is installed in the main drying box 1 through a sliding bearing, which can both rotate and slide. The bottom of the drying chamber 11 is designed as a second conical guide surface 12, so that the dried sodium methoxide can be quickly discharged from the drying chamber 11. When the stirring shaft 61 slides, the blocking block 7 moves accordingly to close or open the third outlet 121. After the blocking block 7 is no longer in contact with the third outlet 121, the material in the drying chamber 11 is discharged from the third outlet 121; after the blocking tube is in contact with the third outlet 121, the drying chamber 11 is in a closed state, which is beneficial to improving the efficiency of material drying. The blocking block 7 is set on the stirring shaft 61. Through the sliding design of the stirring shaft 61, the blocking block 7 can easily control the opening and closing of the third outlet 121 to achieve material discharge control. The second conical guide surface 12 helps the material to flow smoothly to the third outlet 121, thereby improving the discharge efficiency.

[0061] Furthermore, the blocking block 7 has a third conical guide surface 71 at one end away from the third outlet 121 .

[0062] In this embodiment, since the blocking block 7 is located inside the drying chamber 11, during the drying and stirring process, the surrounding of the blocking block 7 will be filled with materials. In order to avoid material residue during the discharge process, the end of the blocking block 7 away from the third outlet 121 is processed into a third conical guide surface 71, which has a smooth surface and is made of high temperature resistant material. The third conical guide surface 71 can guide the material to flow to the third outlet 121 to avoid the accumulation of materials at the blocking block 7. At the same time, the smooth surface can reduce the friction between the material and the blocking block 7, thereby increasing the service life of the blocking block 7.

[0063] Furthermore, it also includes a material storage box 8, which has an entrance 81, and the entrance 81 is used to abut against the third outlet 121; a sliding plate 9 is slidably arranged in the material storage box 8, and the sliding plate 9 has a connecting port 91. After the sliding plate 9 slides, the connecting port 91 is connected to or disconnected from the entrance 81.

[0064] In this embodiment, the material storage box 8 is a sealed box body with an inlet 81, and the shape and size of the inlet 81 match the third outlet 121. The sliding plate 9 can be controlled to slide manually or automatically. The connection port 91 on the sliding plate 9 corresponds to the position of the inlet 81. When the sliding plate 9 slides to a specific position, the connection port 91 is connected to the inlet 81. At this time, the dried material can enter the material storage box 8 after passing through the inlet 81 and the connection port 91. After sliding the sliding plate 9 so that the connection port 91 is no longer connected to the inlet 81, the material storage box 8 can be closed. In the process of discharging after drying, the opening time of the third outlet 121 is controlled according to the capacity of the material storage box 8. In the process of discharging, it is necessary to slide the stirring shaft 61 first so that the blocking fast closes the third outlet 121. At this time, no material is discharged from the third outlet 121. After the material between the third outlet 121 and the inlet 81 passes through the connection port 91, the sliding plate 9 is slid again so that the connection port 91 is no longer connected to the inlet 81, and a new material storage box 8 is replaced. During the discharging process, the operation needs to be strictly followed in order to prevent the discharged materials from accumulating on the sliding plate 9 and thus being unable to enter the storage box 8 through the connecting port 91 .

[0065] The material storage box 8 can conveniently store the dried material, and the design of the sliding plate 9 can control the discharge and storage of the material, thereby improving the continuity and stability of production. The connection control between the connecting port 91 and the inlet 81 makes the discharge of the material more accurate and controllable.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high temperature drying oven for dimethyl carbonate production, characterized in that: include: A main drying box (1), wherein the main drying box (1) has a drying chamber (11); A cache box (2), the cache box (2) being arranged on the top of the main drying box (1), the cache box (2) having a cache cavity (21), and the cache cavity (21) having a first outlet (211); a sliding tube (3), one end of the sliding tube (3) being slidably disposed at the first outlet (211), and the other end of the sliding tube (3) being located outside the main drying box (1) after passing through the main drying box (1); after the sliding tube (3) slides, the drying chamber (11) and the buffer chamber (21) are connected or disconnected through the first outlet (211); Also includes: a partition (4), the partition (4) being arranged in the sliding tube (3), the partition (4) dividing the sliding tube (3) into a preheating chamber (31) and a feeding chamber (32), the feeding chamber (32) having a second outlet (321), and after the sliding tube (3) slides so that the second outlet (321) is located in the buffer chamber (21), the feeding chamber (32) is communicated with the buffer chamber (21); A stirring shaft (61) rotatably disposed in the main drying box (1), wherein the stirring shaft (61) has an air intake passage (611); a first stirring rod (62), the first stirring rod (62) having at least one first stirring rod (62), one end of the first stirring rod (62) being arranged on the stirring shaft (61), the first stirring rod (62) having a first exhaust channel (621), and two ends of the first exhaust channel (621) being respectively connected to the air inlet channel (611) and the drying chamber (11); The stirring shaft (61) is rotatably and slidably arranged in the main drying box (1); the drying chamber (11) has a second conical guide surface (12); the bottom of the second conical guide surface (12) has a third outlet (121); and further comprises: A blocking block (7), wherein the blocking block (7) is arranged at one end of the stirring shaft (61) close to the third outlet (121), and after the stirring shaft (61) slides, the blocking block (7) blocks or cancels the blocking of the third outlet (121).

2. A high temperature drying oven for dimethyl carbonate production according to claim 1, characterized in that: The bottom of the cache chamber (21) has a first conical guide surface (212), the first outlet (211) is located at the bottom of the first conical guide surface (212), and the bottom of the second outlet (321) is not higher than the bottom of the feed chamber (32).

3. A high temperature drying oven for dimethyl carbonate production according to claim 1, characterized in that: Also includes: An exhaust pipe (5), wherein the exhaust pipe (5) is provided in plurality, and the cache chamber (21) and the drying chamber (11) are both connected to the exhaust pipe (5); A one-way valve, wherein the one-way valve is arranged in the exhaust pipe (5).

4. A high temperature drying oven for dimethyl carbonate production according to claim 1, characterized in that: The first stirring rod (62) is arranged to be tilted downward, and further comprises: A second stirring rod (63), the second stirring rod (63) having at least one second stirring rod (63), the second stirring rod (63) being arranged on the stirring shaft (61) in an upwardly inclined manner, the second stirring rod (63) having a second exhaust channel (631), the two ends of the second exhaust channel (631) being respectively connected to the air inlet channel (611) and the drying chamber (11).

5. A high temperature drying oven for dimethyl carbonate production according to claim 4, characterized in that: Also includes: A stirring blade (64), wherein the stirring blade (64) is arranged on the first stirring rod (62) or the second stirring rod (63).

6. A high temperature drying oven for dimethyl carbonate production according to claim 1, characterized in that: The blocking block (7) has a third conical guide surface (71) at one end away from the third outlet (121).

7. A high temperature drying oven for dimethyl carbonate production according to claim 1, characterized in that: Also includes: A material storage box (8), the material storage box (8) having an inlet (81), the inlet (81) being used to abut against the third outlet (121); A sliding plate (9), the sliding plate (9) being slidably disposed in the material storage box (8), the sliding plate (9) having a connecting port (91), and after the sliding plate (9) slides, the connecting port (91) is connected to or disconnected from the inlet (81).

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