A waste gas treatment system for trichlorosucrose production

Abstract

The utility model relates to waste gas treatment technical field, specifically is a kind of waste gas treatment system for trichlorosucrose production, including reaction box, the reaction box is divided into first reaction zone and second reaction zone by partition, the first reaction zone is connected with the first water inlet pipe, first air inlet pipe and first water outlet pipe controlled by corresponding solenoid valve, second reaction zone is connected with the second water inlet pipe, second air inlet pipe and second water outlet pipe controlled by corresponding solenoid valve, first water outlet pipe and second water outlet pipe outlet end are communicated in water storage bucket, first water inlet pipe and second water inlet pipe are communicated with water pump placed in sodium hydroxide liquid storage tank;First air inlet pipe and second air inlet pipe and waste gas discharge pipe are communicated.The use of the application can utilize the first reaction zone and the second reaction zone, ensure that the first reaction zone and the second reaction zone are in an absorption state, thereby ensuring continuous operation without stopping even when the sodium hydroxide solution is better, improving work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically a waste gas treatment system for sucralose production. Background Technology

[0002] In the synthesis of sucralose, the esterification step primarily uses orthoacetic acid triester or acetic anhydride as the esterification reagent, while the chlorination step primarily uses thionyl chloride or phosgene as the chlorination reagent. As is well known, in reactions using thionyl chloride as the chlorination reagent, a large excess of thionyl chloride (often more than 10 times the molar amount of the reactants) is required to ensure a complete chlorination reaction. This large excess of thionyl chloride decomposes into hydrogen chloride and sulfur dioxide during the reaction. Both hydrogen chloride and sulfur dioxide are strong acidic gases and cannot be directly released into the atmosphere.

[0003] The existing method involves discharging hydrogen chloride and sulfur dioxide into a sodium hydroxide solution for centralized treatment. However, continuous discharge of hydrogen chloride and sulfur dioxide into the sodium hydroxide solution causes the solution to change from alkaline to acidic. The solution is best treated at a neutral state. Therefore, the machine is often stopped when the solution reaches neutrality to avoid continuing to pump gas. The neutral solution is then poured out, and sodium hydroxide solution is poured back in before the gas is pumped back in. This method is inefficient because it requires machine shutdown. Utility Model Content

[0004] This invention provides a waste gas treatment system for sucralose production to address the deficiencies in existing technologies.

[0005] This utility model is achieved through the following technical solution:

[0006] A waste gas treatment system for sucralose production includes a reaction chamber, which is divided into a first reaction zone and a second reaction zone by a partition. A pH meter is installed in both the first and second reaction zones and is signal-connected to a controller. The first reaction zone is connected to a first water inlet pipe, a first air inlet pipe, and a first water outlet pipe, all controlled by corresponding solenoid valves. The second reaction zone is connected to a second water inlet pipe, a second air inlet pipe, and a second water outlet pipe, all controlled by corresponding solenoid valves. The outlet ends of the first and second water outlet pipes are connected to a water storage tank. The first and second water inlet pipes are connected to a water pump placed in a sodium hydroxide liquid storage tank. The first and second air inlet pipes are connected to a waste gas emission pipe.

[0007] In operation, both the first and second reaction zones contain sodium hydroxide solution. Initially, under the control of the controller, the second water inlet pipe, second air inlet pipe, second water outlet pipe, first water inlet pipe, and first water outlet pipe are closed, while the first air inlet pipe is open. Gas enters the first reaction zone for reaction. When the pH meter detects that the liquid is neutral, it sends a signal to the controller. The controller then closes the first air inlet pipe and opens the second air inlet pipe, allowing gas to enter the second reaction zone. Simultaneously, the controller opens the first water outlet pipe, allowing neutral water to flow through the second water outlet pipe into a storage tank for collection. After a period of time ensuring no liquid remains in the second reactor, the first water outlet pipe closes and the first water inlet pipe opens, allowing sodium hydroxide to enter the first reaction zone for later use. Once the liquid in the second reaction zone becomes neutral, gas re-enters the first reaction zone, and the neutral liquid in the second reaction zone flows into the storage tank, where new sodium hydroxide solution is then injected. This allows for cyclical operation, avoiding downtime for sodium hydroxide solution replacement and improving work efficiency.

[0008] Preferably, the first and second water inlet pipes are connected to the two outlets of the first three-way pipe, and the water inlet of the first three-way pipe is connected to a water pump placed in a sodium hydroxide liquid storage tank; the first and second air inlet pipes are connected via a horizontal pipe, one end of which is connected to a connecting pipe, and the other end of which is connected to an exhaust pipe; the first and second water outlet pipes are connected to the water inlet of the second three-way pipe, and the water outlet of the second three-way pipe is connected to a water pump placed in a sodium hydroxide liquid storage tank.

[0009] Preferably, both the first and second reaction zones are equipped with rotating rods, each with a lever along its length. The two rotating rods are fixedly connected by a connecting rod, which passes through a partition and is rotatably connected to the partition via a sealed bearing. The rotating rods are driven by a drive device to rotate along their axis. The rotation of the rotating rods, driven by the drive device and synchronized with the connecting rod, causes the levers to actuate, thus ensuring better gas integration into the liquid.

[0010] Preferably, the driving device includes a rotary motor fixedly mounted on the side of the reaction chamber. A drive gear is coaxially sleeved on the shaft of the rotary motor. The outer end of a rotating rod extends out of the reaction chamber and is rotatably connected to the reaction chamber via a sealed bearing. A driven gear, meshing with the drive gear, is sleeved on the rotating rod. The rotation of the rotary motor shaft drives the rotation of the drive gear, which in turn drives the rotation of the rotating rod.

[0011] Preferably, both the rotating rod and the lever are tubular structures, and the lever is connected to the rotating rod. Multiple nozzles are arranged along the length of the lever. One end of the rotating rod is closed, and the other end is connected to the outlet of the corresponding first and second air inlet pipes via a sealed bearing. Gas enters the corresponding first and second reaction zones through the rotating rod and the lever, ensuring more uniform mixing and more thorough integration.

[0012] The beneficial effects of this utility model are as follows: the use of this application can utilize the first reaction zone and the second reaction zone to ensure that one of the first reaction zone and the second reaction zone is in the absorption state, thereby ensuring that the machine can continue to work without stopping even in the presence of better sodium hydroxide solution, thus improving work efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] As shown in the figure:

[0016] 1. First reaction zone; 2. Second reaction zone; 3. First water inlet pipe; 4. First water outlet pipe; 5. First air inlet pipe; 6. Second water inlet pipe; 7. Second water outlet pipe; 8. Second air inlet pipe; 9. Rotary motor; 10. Drive gear; 11. Driven gear; 12. Rotating rod; 13. Pulley; 14. Water storage tank. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] A waste gas treatment system for sucralose production, such as Figure 1As shown, the reaction chamber includes a reaction box, which is divided into a first reaction zone 1 and a second reaction zone 2 by a partition. Both reaction zones 1 and 2 are equipped with pH meters, which are connected to a controller. The first reaction zone 1 is connected to a first water inlet pipe 3, a first air inlet pipe 5, and a first water outlet pipe 4, all controlled by corresponding solenoid valves. The second reaction zone 2 is connected to a second water inlet pipe 6, a second air inlet pipe 8, and a second water outlet pipe 7, all controlled by corresponding solenoid valves. The first water inlet pipe 3 and the second water inlet pipe 6 are connected to the two outlet ends of a first three-way pipe, the water inlet end of which is connected to a water pump placed in a sodium hydroxide liquid storage tank. The first air inlet pipe 5 and the second air inlet pipe 8 are connected by a horizontal pipe, one end of which is connected to a connecting pipe, the other end of which is connected to an exhaust pipe. The first water outlet pipe 4 and the second water outlet pipe 7 are connected to the water inlet end of the second three-way pipe, the water outlet end of which is connected to a water pump placed in a sodium hydroxide liquid storage tank. A water storage tank 14 is located below the reaction chamber.

[0019] In use, sodium hydroxide solution is placed in both the first reaction zone 1 and the second reaction zone 2. Firstly, under the control of the controller, the second water inlet pipe 6, the second air inlet pipe 8, the second water outlet pipe 7, the first water inlet pipe 3, and the first water outlet pipe 4 are closed, while the first air inlet pipe 5 is open. Gas enters the first reaction zone 1 to react. When the pH meter detects that the liquid is neutral, it sends a signal to the controller. The controller then closes the first air inlet pipe 5 and opens the second air inlet pipe 8, allowing gas to enter the second reaction zone 2. Simultaneously, the controller opens the first water outlet pipe 4, allowing neutral water to flow through the second water outlet pipe 7 into the storage tank 14 for unified collection. After a period of time ensuring no liquid remains in the second reactor, the first water outlet pipe 4 is closed and the first water inlet pipe 3 is opened, allowing sodium hydroxide to enter the first reaction zone 1 for later use. After the liquid in the second reaction zone 2 becomes neutral, gas re-enters the first reaction zone 1, and the neutral liquid in the second reaction zone 2 flows into the storage tank 14, where new sodium hydroxide solution is then injected. This allows for cyclical operation, avoiding downtime for changing the sodium hydroxide solution and improving work efficiency.

[0020] Both the first reaction zone 1 and the second reaction zone 2 are equipped with rotating rods 12, and levers 13 are provided along the length of each rotating rod 12. The two rotating rods 12 are fixedly connected by a connecting rod, which passes through a partition and is rotatably connected to the partition via a sealed bearing. The rotating rods 12 are driven by a driving device to rotate along their axis. The rotating rods 12 rotate under the drive of the driving device and synchronously under the action of the connecting rod. The rotation of the rotating rods 12 drives the levers 13 to move, thereby ensuring that the gas is better integrated into the liquid.

[0021] The driving device includes a rotary motor 9 fixedly mounted on the side of the reaction chamber. A drive gear 10 is coaxially sleeved on the shaft of the rotary motor 9. A rotating rod 12 extends out of the reaction chamber and is rotatably connected to it via a sealed bearing. A driven gear 11, meshing with the drive gear 10, is sleeved on the rotating rod 12. The rotation of the rotary motor 9 shaft drives the rotation of the drive gear 10, which in turn drives the rotation of the rotating rod 12.

[0022] Both the rotating rod 12 and the lever 13 are tubular structures, and the lever 13 is connected to the rotating rod 12. Multiple nozzles are arranged along the length of the lever 13. One end of the rotating rod 12 is closed, and the other end is connected to the outlet of the corresponding first air inlet pipe 5 and second air inlet pipe 8 via a sealed bearing. Gas enters the corresponding first reaction zone 1 and second reaction zone 2 via the rotating rod 12 and the lever 13, ensuring more uniform mixing and more thorough integration.

[0023] The use of this application can utilize the first reaction zone 1 and the second reaction zone 2 to ensure that one of the first reaction zone 1 and the second reaction zone 2 is in an absorption state, thereby ensuring that the machine can continue to work without stopping even in the presence of better sodium hydroxide solution, thus improving work efficiency.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waste gas treatment system for sucralose production, characterized in that: The system includes a reaction chamber, which is divided into a first reaction zone and a second reaction zone by a partition. Both the first and second reaction zones are equipped with pH meters, which are signal-connected to a controller. The first reaction zone is connected to a first water inlet pipe, a first air inlet pipe, and a first water outlet pipe, all controlled by corresponding solenoid valves. The second reaction zone is connected to a second water inlet pipe, a second air inlet pipe, and a second water outlet pipe, all controlled by corresponding solenoid valves. The outlets of the first and second water outlet pipes are connected to a water storage tank. The first and second water inlet pipes are connected to a sodium hydroxide solution. The water pump inside the sodium hydroxide liquid storage tank is connected; the first air inlet pipe and the second air inlet pipe are connected to the exhaust gas discharge pipe; the first water inlet pipe and the second water inlet pipe are connected to the two water outlets of the first three-way pipe; the water inlet of the first three-way pipe is connected to the water pump placed inside the sodium hydroxide liquid storage tank; the first air inlet pipe and the second air inlet pipe are connected through a horizontal pipe; one end of the horizontal pipe is connected to a connecting pipe; the other end of the connecting pipe is connected to the exhaust gas discharge pipe; the first water outlet pipe and the second water outlet pipe are connected to the water inlet of the second three-way pipe; the water outlet of the second three-way pipe is connected to the water pump placed inside the sodium hydroxide liquid storage tank.

2. The waste gas treatment system for sucralose production according to claim 1, characterized in that: Both the first and second reaction zones are equipped with rotating rods, and each rotating rod has a lever along its length. The two rotating rods are fixedly connected by a connecting rod, which passes through a partition and is rotatably connected to the partition via a sealed bearing. The rotating rods are driven by a driving device to rotate along their axis.

3. The waste gas treatment system for sucralose production according to claim 2, characterized in that: The driving device includes a rotary motor fixedly mounted on the side of the reaction chamber. The rotating shaft of the rotary motor is coaxially sleeved with a drive gear. The outer end of the rotating rod extends out of the reaction chamber and is rotatably connected to the reaction chamber through a sealed bearing. A driven gear that meshes with the drive gear is sleeved on the rotating rod.

4. The waste gas treatment system for sucralose production according to claim 3, characterized in that: Both the rotating rod and the lever are tubular structures, and the lever is connected to the rotating rod. Multiple nozzles are arranged along the length of the lever. One end of the rotating rod is closed, and the other end is connected to the air outlet of the corresponding first air inlet pipe and second air inlet pipe through a sealed bearing.

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