BTC deep chlorination device

Abstract

The utility model relates to a BTC deep chlorination device, which belongs to the technical field of BTC production process and comprises a glass reaction tower, a constant-temperature heating device is arranged on the outer side of the glass reaction tower, a cooling mechanism is arranged on the left side of the glass reaction tower, and a lock catch mechanism is arranged on the outer side of the constant-temperature heating device. According to the BTC deep chlorination device, the outer side of the glass reaction tower is annularly wrapped with the electric heating belt, the upper limiting block and the lower limiting block are limited through the upper limiting block and the lower limiting block, the electric heating belt is tightly attached to the outer side of the glass reaction tower, the heating efficiency can be better improved, the elastic belt is arranged to adapt to the glass reaction towers with different diameters, and the practicability is high. The glass reaction tower can be prevented from being scratched by the elastic band, the temperature in the glass reaction tower is increased by the electric heating band, the chlorination reaction temperature is ensured, the chlorination reaction is complete, the BTC product quality is ensured, and the constant-temperature heating device has a high-temperature power-off function, so that the risks that the temperature in the tower is too high and the product is decomposed at high temperature due to too large heating capacity are prevented.

Description

Technical Field

[0001] This utility model relates to the field of BTC production process technology, specifically a BTC deep chlorination device. Background Technology

[0002] BTC, also known as di(trichloromethyl) carbonate, is produced using a bulk chlorination process of DMC (dimethyl carbonate) in current BTC production processes, all of which utilize glass reaction towers.

[0003] Currently, BTC production processes all use glass reaction towers with internal cooling coils, making it difficult to install additional glass jackets on the outside of the existing glass reaction tower structure. On the other hand, existing chlorination processes generally involve a one-time addition of DMC followed by the introduction of chlorine gas under ultraviolet light to carry out the chlorination reaction until BTC is produced. The temperature drop in the later stages of the reaction is usually taken as the end of the reaction, but at this point the reaction is not yet complete. Ultimately, it is difficult for the initial melting point of the BTC product to reach 80°C. In the final stage of the reaction, as the reaction is nearing its end, the heat released by the chlorination reaction is less than the heat lost by the system (heat carried away by the reaction gases and heat dissipated to the environment), causing the reaction temperature to continue to drop. On the one hand, the temperature drop further reduces the chlorination reaction rate; on the other hand, the reaction liquid is at risk of solidification in the tower after the temperature drops. In production, the high temperature of the reactants poses a risk of decomposition, and the temperature cannot be controlled too high in the early stages of the reaction. Ultimately, the BTC chlorination reaction is incomplete, and the product quality cannot be optimized. Therefore, this application proposes a deep chlorination device for BTC to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a BTC deep chlorination device, which has advantages such as maintaining a constant temperature of the compound inside the tower, thus solving the problem of declining product quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a BTC deep chlorination device, comprising a glass reaction tower, a constant temperature heating device provided on the outside of the glass reaction tower, a cooling mechanism provided on the left side of the glass reaction tower, and a locking mechanism provided on the outside of the constant temperature heating device.

[0006] Furthermore, the constant temperature heating device includes an electric heating belt that is wrapped around the outside of the glass reaction tower in a ring shape with its ends touching. The locking mechanism is located at the point where the ends of the electric heating belt touch. An electric heating device is located on the outside of the electric heating belt. A display device is located on the front side of the electric heating device. An alarm device is located on the top of the electric heating device. A temperature sensor is located on the outside of the electric heating belt.

[0007] Furthermore, the locking mechanism includes a fixed seat located at the point where the ends of the electric heating band meet and near its right side. An elastic band extends from the inside of the fixed seat to its left end. A connecting block is provided at the end of the elastic band away from the fixed seat. A locking block is provided at the left end of the connecting block. A connecting shell is provided at the point where the ends of the electric heating band meet and near its left side. Limiting plates are provided at the top and bottom of the connecting shell. Limiting blocks are provided on the opposite side of the two limiting plates near their right ends. A movable block is slidably connected to the left side of the connecting shell. Two push rods are symmetrically distributed vertically and vertically along the central axis of the movable block at the right end. Semi-circular protrusions are provided on the opposite side of the two limiting plates near their left ends.

[0008] Furthermore, a slot is provided on the right side of the connecting shell to fit the gap of the locking block, and the front and rear sides of the locking block are respectively attached to the front and rear side walls of the inner cavity of the connecting shell.

[0009] Furthermore, the two push rods are located on the left side of the two semi-circular protrusions respectively, and the upper and lower sides of the connecting shell are provided with slots that allow the two limiting plates to rotate and connect. Torsion springs are provided at the connection points between the two limiting plates and the slots.

[0010] Furthermore, the cross-sectional shape of both limiting blocks is a triangle with inclined surfaces facing the upper and lower sides of the connecting block, and it fits against the right side of the card block.

[0011] Furthermore, there are two locking mechanisms, which are symmetrically distributed about the central axis of the electric heating belt.

[0012] Furthermore, the cooling mechanism includes a water tank located on the left side of the glass reaction tower. The water tank is connected to the external wall by bolts. A water pump is fixed to the upper surface of the water tank by bolts. The water pump has an inlet pipe connected to its inlet end and an outlet pipe connected to its outlet end. A liquid injection pipe is connected to the left side of the water tank.

[0013] Furthermore, the water tank is filled with refrigerant and has cooling plates installed inside. The end of the water outlet pipe away from the water pump passes through the outside of the glass reaction tower and extends into its interior, spiraling downwards. The bottom end of the water outlet pipe, located at the bottom of the glass reaction tower, passes through the inner wall of the glass reaction tower's inner cavity and extends to its left side, communicating with the right side of the water tank.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] This BTC deep chlorination device uses an electric heating belt that wraps around the outside of a glass reaction tower in a ring shape. Two adjacent limiting blocks restrict the upper and lower side blocks, ensuring a tight fit between the electric heating belt and the outside of the glass reaction tower. This improves heating efficiency. An elastic band accommodates glass reaction towers of different diameters and prevents scratches. The electric heating belt raises the temperature inside the glass reaction tower, maintaining the chlorination reaction temperature and ensuring complete chlorination, thus guaranteeing BTC product quality. The constant temperature heating device is equipped with a high-temperature power-off function to prevent excessive heating, which could lead to overheating and product decomposition. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the locking mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the cooling mechanism of this utility model.

[0019] In the diagram: 1 Glass reaction tower, 2 Locking mechanism, 201 Fixed base, 202 Elastic band, 203 Connecting block, 204 Locking block, 205 Connecting shell, 206 Semi-circular protrusion, 207 Limiting plate, 208 Limiting block, 209 Moving block, 210 Push rod, 3 Electric heating belt, 4 Cooling mechanism, 401 Water tank, 402 Water pump, 403 Inlet pipe, 404 Outlet pipe, 405 Liquid injection pipe, 5 Electric heating device. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 In this embodiment, a BTC deep chlorination device includes a glass reaction tower 1, a constant temperature heating device is provided on the outside of the glass reaction tower 1, a cooling mechanism 4 is provided on the left side of the glass reaction tower 1, and a locking mechanism 2 is provided on the outside of the constant temperature heating device.

[0022] The constant temperature heating device includes an electric heating belt 3 that is wrapped around the outside of the glass reaction tower 1 in a ring shape with its ends touching. A locking mechanism 2 is set at the point where the ends of the electric heating belt 3 are touching. An electric heating device 5 is set on the outside of the electric heating belt 3. A display device is set on the front side of the electric heating device 5. An alarm device is set on the top of the electric heating device 5. A temperature sensor is set on the outside of the electric heating belt 3.

[0023] Understandably, when maintaining a constant temperature of 80℃ is required, the temperature sensor can monitor the temperature of the electric heating belt 3 in real time, and the real-time temperature of the electric heating belt 3 can be observed through the display device. When the temperature deviates significantly, the alarm device will be activated to remind the staff to check.

[0024] Please see Figure 2 In this embodiment, the locking mechanism 2 includes a fixing seat 201 located at the point where the ends of the electric heating belt 3 meet and near its right side. An elastic band 202 extends from the inside of the fixing seat 201 to its left end. The elastic band 202 is fixed to the inside of the fixing seat 201 by pressing or using strong adhesive. A connecting block 203 is provided at the end of the elastic band 202 away from the fixing seat 201, and the connecting block 203 is fixedly connected to the elastic band 202. A locking block 204 is provided at the left end of the connecting block 203. A connecting shell 205 is provided at the contact point and near its left side. A limit plate 207 is provided at the top and bottom of the connecting shell 205. A limit block 208 is provided on the opposite side of the two limit plates 207 and near its right end. A moving block 209 is slidably connected to the left side of the connecting shell 205. Two push rods 210 are provided on the right end of the moving block 209, which are symmetrically distributed vertically and vertically along the central axis of the moving block 209. A semi-circular protrusion 206 is provided on the opposite side of the two limit plates 207 and near its left end.

[0025] There are two locking mechanisms 2, which are symmetrically distributed about the central axis of the electric heating belt 3. A slot is provided on the right side of the connecting shell 205 to fit the locking block 204. The front and rear sides of the locking block 204 are respectively attached to the front and rear side walls of the inner cavity of the connecting shell 205. Two push rods 210 are located to the left of the two semi-circular protrusions 206. Holes are provided on both the upper and lower sides of the connecting shell 205 to allow the two limiting plates 207 to rotate and connect. Torsion springs are provided at the connection points between the two limiting plates 207 and the hollow slots. The cross-sectional shape of the two limiting blocks 208 is an inclined surface facing the connecting block 203. The two triangular shapes on both sides, and the right side of the locking block 204, wrap the electric heating belt 3 in a ring around the outside of the glass reaction tower 1, so that its ends are close together. Then, the two locking blocks 204 on the right side are inserted into the two connecting shells 205 respectively, so that the two adjacent upper and lower limiting blocks 208 move in opposite directions in an arc trajectory. When the two locking blocks 204 move to the left side of the two adjacent upper and lower limiting blocks 208 respectively, the upper and lower torsion springs start to reset, so that the two adjacent upper and lower limiting blocks 208 limit the upper and lower locking blocks 204, thereby making the electric heating belt 3 fit tightly with the outside of the glass reaction tower 1, which can better improve the heating efficiency.

[0026] It is understandable that by pressing the two moving blocks 209 respectively, the two adjacent push rods 210 push the two adjacent semi-circular protrusions 206 respectively, so that the two adjacent limiting plates 207 move in opposite directions respectively. At this time, the two locking blocks 204 can be disengaged from the two connecting shells 205 respectively, thereby disassembling the electric heating belt 3.

[0027] Please see Figure 3 In this embodiment, the cooling mechanism 4 includes a water tank 401 located on the left side of the glass reaction tower 1. The water tank 401 is connected to the external wall by bolts. A water pump 402 is fixed to the upper surface of the water tank 401 by bolts. The water inlet end of the water pump 402 is connected to a water inlet pipe 403, and the water outlet end of the water pump 402 is connected to a water outlet pipe 404. A liquid injection pipe 405 is connected to the left side of the water tank 401, and the refrigerant is transferred to the water tank 401 through the liquid injection pipe 405.

[0028] The interior of water tank 401 is filled with refrigerant and equipped with a cooling plate, also known as a thermoelectric semiconductor refrigeration component. The cooling plate is a two-sided piece that absorbs heat on one side and dissipates heat on the other, serving as a heat conductor. It does not generate cold itself and is a common type of cooling plate in the prior art, which will not be described in detail here. The end of the water outlet pipe 404 away from the water pump 402 passes through the outside of the glass reaction tower 1 and extends into its interior, spiraling downwards. The bottom end of the water outlet pipe 404 at the bottom of the glass reaction tower 1 passes through the inner wall of the inner cavity of the glass reaction tower 1 and extends to its left side, connecting with the right side of the water tank 401. When cooling is required, the water pump 402 can be started to draw out the refrigerant and transfer it to the interior of the water outlet pipe 404, so that the refrigerant can exchange heat with the substances in the glass reaction tower 1, thereby achieving the purpose of cooling. The cooling plate can cool the refrigerant in the water tank 401, improving its cooling efficiency.

[0029] Understandably, the chlorination reaction of BTC begins at this point and is divided into two stages: the first stage is initial chlorination, and the second stage is final chlorination. During the initial chlorination, when the tower is started up for the first time with no charge, DMC is added all at once. After chlorination to generate polychlorinated compounds, the process immediately switches to normal production. DMC and chlorine are continuously added from the bottom of the tower, achieving a continuous production process for initial chlorination. The materials inside the tower are mainly polychlorinated compounds, which do not pose a risk of combustion or explosion. When restarting after a shutdown, the polychlorinated compounds are used directly to start the chlorination reaction, eliminating the safety risks caused by frequent DMC additions. During final chlorination, a constant temperature heating device is used to raise the temperature inside the glass reaction tower 1 through electric heating belts 3, ensuring the chlorination reaction temperature is maintained and thus ensuring the complete chlorination reaction and the quality of the BTC product. The constant temperature heating device is equipped with a high-temperature power-off function to prevent excessive heating, which could lead to excessively high tower temperatures and the risk of product decomposition at high temperatures.

[0030] It is understood that all electrical components mentioned in this article are electrically connected to the main controller and power supply, and all electrical components mentioned in this article are conventional and known devices. This application will not elaborate further. The main controller can be a conventional and known device such as a computer that performs control. The control circuit of the main controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices. Therefore, this utility model will not explain the control method and circuit connection in detail. At the same time, all parts not described in detail in this utility model are common technologies known to those skilled in the art.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The working principle of the above embodiments is as follows:

[0033] When the BTC deep chlorination unit is needed, the refrigerant is transferred to the water tank 401 through the injection pipe 405. Then, the electric heating belt 3 is wrapped in a ring around the outside of the glass reaction tower 1, with its ends close together. Next, the two right-side locking blocks 204 are inserted into the two connecting shells 205, causing the two adjacent upper and lower limiting blocks 208 to move in opposite directions along an arc-shaped trajectory. When the two locking blocks 204 move to the left side of the two adjacent upper and lower limiting blocks 208, the upper and lower torsion springs begin to reset, causing the two adjacent upper and lower limiting blocks 208 to limit the upper and lower locking blocks 204, thus ensuring a tight fit between the electric heating belt 3 and the outside of the glass reaction tower 1, improving heating efficiency. At this point, the BTC chlorination reaction begins, divided into two stages: the first stage is initial chlorination, and the second stage is final chlorination. During the initial empty tower start-up for initial chlorination, DMC is added all at once. After chlorination to generate polychlorinated compounds, the process immediately transitions to the final stage. In the normal production process, DMC and chlorine are continuously added from the bottom of the tower, achieving continuous production through initial chlorination. When cooling is required, the refrigerant can be extracted by starting the water pump 402 and transferred to the inside of the water outlet pipe 404, allowing the refrigerant to exchange heat with the substances in the glass reaction tower 1, thereby achieving the purpose of cooling. The refrigerant in the water tank 401 can be cooled by the cooling plates, improving its cooling efficiency. At this time, the materials in the tower are mainly polychlorinated compounds, which do not pose a risk of combustion or explosion. When restarting after a shutdown, the polychlorinated compounds are used directly to start the chlorination reaction, eliminating the safety risks caused by frequent DMC feeding. During final chlorination, a constant temperature heating device is used to raise the temperature inside the glass reaction tower 1 through the electric heating belt 3 to ensure the chlorination reaction temperature, thereby ensuring the chlorination reaction is complete and ensuring the quality of BTC products. The constant temperature heating device is equipped with a high-temperature power-off function to prevent excessive heating, which could cause the tower temperature to be too high and the product to decompose at high temperatures.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A BTC deep chlorination apparatus, comprising a glass reaction tower (1), characterized in that: A constant temperature heating device is provided on the outside of the glass reaction tower (1), a cooling mechanism (4) is provided on the left side of the glass reaction tower (1), and a locking mechanism (2) is provided on the outside of the constant temperature heating device. The constant temperature heating device includes an electric heating belt (3) that is wrapped around the outside of the glass reaction tower (1) in a ring shape and with its ends touching. The locking mechanism (2) is set at the point where the ends of the electric heating belt (3) touch. An electric heating device (5) is set on the outside of the electric heating belt (3). A display device is set on the front side of the electric heating device (5). An alarm device is set on the top of the electric heating device (5). A temperature sensor is set on the outside of the electric heating belt (3). The locking mechanism (2) includes a fixing seat (201) located at the point where the ends of the electric heating belt (3) are in contact and near its right side. An elastic band (202) extends from the inside of the fixing seat (201) to its left end. A connecting block (203) is located at one end of the elastic band (202) away from the fixing seat (201). A locking block (204) is located at the left end of the connecting block (203). A connecting shell (205) is located at the point where the ends of the electric heating belt (3) are in contact and near its left side. 5) Both the top and bottom ends are provided with limit plates (207), and the two limit plates (207) are provided with limit blocks (208) on the opposite side and near their right ends. The left side of the connecting shell (205) is slidably connected with a moving block (209). The right end of the moving block (209) is provided with two push rods (210) symmetrically distributed above and below the central axis of the moving block (209). The two limit plates (207) are provided with semi-circular protrusions (206) on the opposite side and near their left ends.

2. The BTC deep chlorination apparatus according to claim 1, characterized in that: The right side of the connecting shell (205) is provided with a slot that fits with the card block (204) with a clearance. The front and rear sides of the card block (204) are respectively attached to the front and rear side walls of the inner cavity of the connecting shell (205).

3. The BTC deep chlorination apparatus according to claim 1, characterized in that: The two push rods (210) are located on the left side of the two semi-circular protrusions (206). The upper and lower sides of the connecting shell (205) are provided with slots that allow the two limiting plates (207) to rotate and connect. Torsion springs are provided at the connection points between the two limiting plates (207) and the slots.

4. The BTC deep chlorination apparatus according to claim 1, characterized in that: The cross-sectional shape of the two limiting blocks (208) is a triangle with the inclined surface facing the upper and lower sides of the connecting block (203), and it fits against the right side of the card block (204).

5. The BTC deep chlorination apparatus according to claim 1, characterized in that: The number of the locking mechanism (2) is two, and the two locking mechanisms (2) are symmetrically distributed above and below each other with the central axis of the electric heating belt (3) as the line of symmetry.

6. The BTC deep chlorination apparatus according to claim 1, characterized in that: The cooling mechanism (4) includes a water tank (401) located on the left side of the glass reaction tower (1). The water tank (401) is connected to the external wall by bolts. A water pump (402) is fixed to the upper surface of the water tank (401) by bolts. The water inlet end of the water pump (402) is connected to a water inlet pipe (403). The water outlet end of the water pump (402) is connected to a water outlet pipe (404). A liquid injection pipe (405) is connected to the left side of the water tank (401).

7. A BTC deep chlorination apparatus according to claim 6, characterized in that: The water tank (401) is filled with refrigerant. The end of the water outlet pipe (404) away from the water pump (402) passes through the outside of the glass reaction tower (1) and extends into its interior, spiraling downwards. The bottom end of the water outlet pipe (404) located at the bottom of the glass reaction tower (1) passes through the inner wall of the inner cavity of the glass reaction tower (1) and extends to its left side, communicating with the right side of the water tank (401).

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