A special reaction device for producing viscose staple fiber oil

Abstract

The utility model discloses a viscose short fiber oil agent production special reaction unit belongs to chemical production equipment field. It includes the reaction unit and stirring unit, and the reaction unit includes the reaction cavity, and it is used for accommodating the reactant in it, and the stirring unit inserts the reaction cavity, and the reactant in the reaction cavity is stirred, still includes defoaming unit, including defoaming chamber, collection tank, vacuum pipe, defoaming vane and vacuum pump: defoaming chamber is set up in the reactant liquid level above the reaction cavity, and its surface is equipped with the bubble -suction hole, collection tank is the sealed container, and is set up in the reaction unit outside, vacuum pipe is equipped with the open end and the closed end, and the open end communicates the collection tank, and the closed end inserts the inside of defoaming chamber, wherein, the pipe wall of vacuum pipe on inserting defoaming chamber is equipped with the negative pressure hole, defoaming vane is located in the defoaming chamber, and can rotate the sleeve joint in the outer wall of vacuum pipe simultaneously, vacuum pump communicates the collection tank and is used for carrying out the vacuumizing in the collection tank. The utility model aims at realizing defoaming without mechanical force.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment, and more specifically, relates to a special reaction device for the production of viscose staple fiber oil. Background Technology

[0002] Traditional stirred reactors present numerous problems in the production process of viscose staple fiber oils. Because the oils contain a large amount of surfactants, significant amounts of foam are generated during heating and stirring. If this foam is not promptly eliminated, it can easily lead to overflow, resulting in material waste, potential safety issues, and environmental pollution.

[0003] Meanwhile, viscose staple fiber oil has a high viscosity and is extremely prone to sticking to the vessel walls. Ordinary stirring paddles cannot effectively mix the materials near the vessel walls during the mixing process, resulting in poor mixing and affecting product quality. Furthermore, after the reaction, the oil adheres to the vessel walls and is difficult to clean; traditional cleaning methods consume significant manpower, resources, and time, reducing production efficiency.

[0004] For example, Chinese patent application No. 202110926396.2, published on September 10, 2021, discloses a reaction vessel with defoaming function. This reaction vessel includes a tank body with a stirring shaft at its center. A power mechanism for driving the stirring shaft is located at the top or bottom of the tank body. An annular float is located inside the tank body, with a central cylinder at its center. Several connecting ribs are provided between the central cylinder and the float. The central cylinder has a through hole at its center and an annular cavity coaxial with the through hole inside. Several induction coils are located within the annular cavity. Several sets of metal wires connect the central cylinder and the float. A rotor is located inside the central cylinder, and the stirring shaft drives the rotor to rotate. However, this reaction vessel relies on induced current passing through the metal wires to generate heat to burst the foam, which is costly due to the reliance on additional energy and has a complex structure.

[0005] Therefore, it is necessary to design a special reaction device for the production of viscose staple fiber oil, which can solve the defoaming problem at a low cost. Summary of the Invention

[0006] 1. The problem to be solved The purpose of this invention is to provide a special reaction device for the production of viscose staple fiber oil, which aims to achieve defoaming without mechanical force.

[0007] 2. Technical Solution To solve the above problems, the present invention adopts the following technical solution.

[0008] A special reaction apparatus for producing viscose staple fiber oil includes a reaction unit and a stirring unit. The reaction unit includes a reaction chamber for containing reactants. The stirring unit is inserted into the reaction chamber to stir the reactants. The apparatus also includes a defoaming unit, which comprises a defoaming chamber, a collection tank, a vacuum tube, defoaming blades, and a vacuum pump. The defoaming chamber is located above the surface of the reactant liquid in the reaction chamber, and its surface is provided with bubble-absorbing holes; The collection tank is a sealed container located outside the reaction unit; A vacuum tube has an open end and a closed end. The open end is connected to a collection tank, and the closed end is inserted into the defoaming chamber. The tube wall of the vacuum tube inserted into the defoaming chamber is provided with a negative pressure hole. The defoaming blade is located inside the defoaming chamber and can be rotatably sleeved on the outer wall of the vacuum tube; A vacuum pump, connected to a collection tank, is used to create a vacuum within the collection tank.

[0009] With the above technical solution, in the production process of viscose staple fiber oil, the foam generated by heating and stirring can be sucked in and broken by the defoaming unit, solving the problem of excessive foam causing overflow. Specifically, a vacuum pump evacuates the collection tank, which is connected to a vacuum tube and connected to the defoaming chamber through a negative pressure hole, creating a pressure difference between the defoaming chamber and the reaction chamber. Airflow enters through the suction holes in the defoaming chamber, then passes through the defoaming blades, causing them to rotate and break up the foam sucked into the defoaming chamber. The entire process relies on negative pressure to drive the airflow, requiring no mechanical assistance. The collection tank and vacuum tube should have good sealing performance to prevent air leakage from affecting the defoaming effect. The size and number of suction holes should be reasonably designed according to the size of the reaction vessel and the amount of foam generated. Defoaming blades are installed in the defoaming chamber, and the shape of the defoaming blades should be able to match the defoaming chamber so that the foam can fully collide with the blades to achieve defoaming.

[0010] In one possible embodiment of this invention, the distance between the bottom of the defoaming chamber and the surface of the reactant liquid in the reaction chamber is 20-30 cm. This effectively prevents foam from overflowing the reaction chamber and avoids the reactant being drawn into the defoaming chamber.

[0011] As one possible implementation of this utility model, the negative pressure hole is located above the connection between the defoaming blade and the vacuum tube, reducing the possibility of foam being sucked into the vacuum tube by the negative pressure hole.

[0012] In one possible embodiment of this invention, the diameter of the bubble-absorbing hole is larger than that of the negative pressure hole. This facilitates the absorption of foam generated within the reaction chamber by the bubble-absorbing hole, while the smaller size of the negative pressure hole reduces the possibility of foam being drawn into the vacuum tube. As a preferred embodiment, the diameter of the bubble-absorbing hole is 5-8 cm, and the diameter of the negative pressure hole is 2-3 cm.

[0013] In one possible embodiment of this utility model, the defoaming blade is rotatably sleeved on the outer wall of the vacuum tube via a bearing. It should be noted that, to enhance connection stability and protect the vacuum tube from damage, a flange is installed on the vacuum tube, and the bearing is sleeved on the outer surface of the flange. The defoaming blade consists of a central ring and several blades outside the ring. The central ring is sleeved on the outer surface of the bearing, and the blades rotate under the action of airflow.

[0014] In one possible embodiment of this utility model, the stirring unit includes a stirring motor, a stirring shaft, a stirring paddle, and a wall scraper. The stirring motor is located outside the reaction unit, and the stirring shaft is connected to the stirring motor. The stirring motor drives the stirring shaft to rotate. The stirring paddle is an anchor-type blade fixed to the stirring shaft. The rotation of the stirring shaft drives the anchor-type blade to stir within the reaction chamber. A wall scraper, made of rubber, is located near the edge of the stirring paddle close to the inner wall of the reaction chamber. This scraper can remove the inner layer of oil without damaging it. The stirring shaft is located at the center of the reaction chamber and is driven to rotate by the stirring motor. The anchor-type blade is anchor-shaped, and its shape matches the shape of the inner wall of the reaction chamber. The wall scraper is in close contact with the inner wall of the reaction chamber. The flexible rubber wall scraper can effectively remove the oil adhering to the vessel wall during stirring, ensuring thorough mixing of the materials and improving the mixing effect.

[0015] In one possible embodiment of this invention, the reaction unit is composed of an outer layer and an inner layer nested together, with a circulation chamber formed between the outer and inner layers, and a reaction chamber formed by the space within the inner layer. A circulating liquid is introduced into the circulation chamber to heat the reactants within the reaction chamber. Preferably, the inner and outer layers are made of high-borosilicate glass, which is resistant to high temperatures and corrosion, and facilitates observation of the experimental process; the heating within the circulation chamber prevents uneven heating of the materials.

[0016] In one possible embodiment of this invention, a temperature electrode and a heating device are also included. The temperature electrode is inserted into the reaction chamber; the heating device provides heating circulating liquid to the circulation chamber to form a circulation loop. The temperature electrode uses a platinum resistance temperature sensor with an accuracy of ±0.1℃, which collects temperature data in real time at high frequency. The heating device can be a boiler or a high-low temperature integrated unit.

[0017] As one possible embodiment of this utility model, it also includes a cleaning unit, which includes a nozzle, a delivery pump and a cleaning liquid tank. There are two nozzles, which are respectively located at the top of the reaction chamber and the top of the collection tank of the reaction unit. The cleaning liquid tank is connected to the two nozzles through pipes, and the delivery pump delivers the cleaning liquid in the cleaning liquid tank to the nozzles.

[0018] With the above technical solution, the nozzle is installed at the top of the reaction chamber, and the spray direction of the nozzle is towards the wall and bottom of the reactor. The delivery pump is used to control the flow rate and pressure of the cleaning liquid. When the reaction chamber needs to be cleaned, the valve is opened and the delivery pump is started. The cleaning liquid is sprayed from the cleaning liquid tank through the nozzle into the interior of the reaction chamber to clean the oil adhering to the inner wall and bottom of the reaction chamber.

[0019] The collection tank is connected to a vacuum pump to maintain a vacuum. The gas delivered by the vacuum tube enters the collection tank and passes through the nozzle at the top of the collection tank to further eliminate foam and complete the collection of waste liquid.

[0020] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The reaction device of this utility model has a defoaming function. The defoaming unit can eliminate a large amount of foam generated during the heating and stirring process in a timely manner, effectively preventing the occurrence of foam overflow, avoiding material waste and safety hazards, and also reducing pollution to the production environment. (2) The reaction device of this utility model has excellent stirring efficiency. The stirring unit is designed with an anchor-type stirring paddle, and a wall scraper is set on the outer edge of the stirring paddle. The wall scraper is preferably made of flexible rubber material, which can be closely attached to the reactor wall for stirring, so that the material can be fully stirred and mixed in the entire reactor. At the same time, the wall scraper effectively scrapes off the oil on the inner wall, which significantly improves the mixing effect and thus improves the product quality of viscose short fiber oil. (3) The reaction device of this utility model also realizes the cleaning function. The cleaning unit can quickly and effectively clean the reaction vessel after the reaction is completed, which greatly saves manpower, material resources and cleaning time and improves production efficiency. At the same time, a nozzle is designed on the top of the collection tank of the defoaming unit. When an unavoidable small amount of foam enters the collection tank, it is sprayed to defoam in time, avoiding too much foam in the collection tank and cleaning the collection tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the special reaction device for producing viscose staple fiber oil agent according to this utility model; Figure 2 This is a schematic diagram of the stirring unit in the special reaction device for producing viscose staple fiber oil agent according to this utility model; Figure 3 This is a front view of the defoaming chamber in the special reaction device for producing viscose staple fiber oil agent according to this utility model; Figure 4 This is a bottom view of the defoaming chamber in the special reaction device for producing viscose staple fiber oil agent according to this utility model. In the picture: 1. Reaction unit; 11. Outer layer; 12. Circulation chamber; 13. Inner layer; 14. Reaction chamber; 2. Stirring unit; 21. Stirring motor; 22. Stirring shaft; 23. Stirring blade; 24. Scraper; 3. Defoaming unit; 31. Defoaming chamber; 311. Bubble suction hole; 32. Collection tank; 33. Vacuum tube; 331. Negative pressure hole; 34. Defoaming blade; 35. Vacuum pump; 41. Temperature electrode; 42. Heating device; 5. Cleaning unit; 51. Nozzle; 52. Transfer pump; 53. Cleaning liquid tank. Detailed Implementation

[0022] 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 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.

[0023] Example like Figure 1 The image shows a reaction apparatus for producing viscose staple fiber oil in this embodiment, comprising a reaction unit 1, a stirring unit 2, and a defoaming unit 3. Specifically: Reaction unit 1 is a reaction vessel, including a reaction chamber 14. Common reaction vessels use the following methods to heat the reaction chamber 14: jacketed heating, coil heating (a spiral coil is installed inside the vessel or jacket, and a heat medium is introduced to improve heat transfer efficiency), electric heating (a hot wire wraps around the vessel body or an inserted electric heating rod), or open flame heating. This embodiment illustrates a jacketed heating structure, where reaction unit 1 is formed by a high borosilicate glass outer layer 11 and an inner layer 13, which together form a circulation chamber 12. The space in the inner layer 13 forms the reaction chamber 14. The circulation chamber 12 is circulated with a circulating liquid generated by a heating device 42, forming a circulation loop for heating the reactants in the reaction chamber 14. Indirect heating through the circulation chamber 12 avoids uneven heating of the materials. The heating device 42 can be a boiler or a high-low temperature integrated machine. To monitor the reaction temperature in the reaction chamber 14 in real time, an inserted temperature electrode 41, i.e., a platinum resistance temperature sensor with an accuracy of ±0.1℃, is installed to collect temperature data at high frequency in real time.

[0024] The stirring unit 2 is mainly made of metal, such as Figure 2As shown, the reaction unit 1 includes a stirring motor 21, a stirring shaft 22, and a stirring paddle 23. The stirring motor 21 is located outside the reaction unit 1. The metal stirring shaft 22 is connected to the stirring motor 21, and the stirring motor 21 drives the stirring shaft 22 to rotate. The stirring paddle 23 is a metal anchor-shaped blade fixed to the stirring shaft 22. The anchor-shaped blade is adapted to the shape of the reactor wall. The rotation of the stirring shaft 22 drives the anchor-shaped blade to stir within the reaction chamber 14, thus agitating the reactant components. A wall scraper 24 is provided near the edge of the inner wall of the reaction chamber 14. The wall scraper 24 is made of flexible rubber and fits tightly against the inner wall of the inner layer 13. It can scrape off the oil on the inner layer 13 without damaging it, effectively removing the oil adhering to the reactor wall during the stirring process, ensuring thorough mixing of the materials and improving the mixing effect.

[0025] The defoaming unit 3 includes a defoaming chamber 31, a collection tank 32, a vacuum tube 33, defoaming blades 34, and a vacuum pump 35. The defoaming chamber 31 is located 20-30 cm above the surface of the reactant liquid in the reaction chamber 14, effectively preventing foam from overflowing the reaction chamber and avoiding the absorption of reactants into the defoaming chamber 31. The surface of the defoaming chamber 31 is uniformly distributed with through holes—foam-absorbing holes 311. In this embodiment, the diameter of the foam-absorbing holes 311 is 5-8 cm.

[0026] The collection tank 32 is a sealed container located outside the reaction unit 1; the vacuum pump 35 is connected to the collection tank 32 and is used to evacuate the collection tank 32. At the same time, a valve is installed on the pipeline to control whether to evacuate.

[0027] The vacuum tube 33 has an open end and a closed end. The open end connects to the collection tank 32, and the closed end is inserted into the defoaming chamber 31. A valve is installed outside the reactor. A through hole—a negative pressure hole 341—is provided on the wall of the vacuum tube 33 inside the defoaming chamber 31. To reduce the possibility of foam being sucked into the vacuum tube by the negative pressure hole 341, the negative pressure hole 341 is located above the connection point between the defoaming blade 34 and the vacuum tube 33. In this embodiment, the diameter of the negative pressure hole 331 is 2-3 cm. The diameter of the bubble suction hole 311 is larger than that of the negative pressure hole 331, which facilitates the absorption of foam generated in the reaction chamber. Simultaneously, the smaller size of the negative pressure hole reduces the possibility of foam being sucked into the vacuum tube.

[0028] Defoaming blades 34 are located within the defoaming chamber 31 and are rotatably sleeved onto the outer wall of the vacuum tube 34 via bearings. In this embodiment, to protect the vacuum tube 33 from damage, a flange is installed on the vacuum tube 33, and the bearing is sleeved onto the outer surface of the flange. Figure 3 and Figure 4 As shown, the defoaming blade 34 consists of a central ring and several blades outside the ring. The central ring is fitted on the outer surface of the bearing, and the defoaming blade 34 rotates under the action of airflow.

[0029] To address the problem of oil adhering to the reactor wall and being difficult to clean, the reaction apparatus in this embodiment is also equipped with a cleaning unit 5. The cleaning unit 5 includes a nozzle 51, a delivery pump 52, and a cleaning liquid tank 53. The nozzle 51 is located at the top of the reaction chamber 14 of the reaction unit 1, facing the side wall and bottom of the reaction chamber 14. The cleaning liquid tank 53 is connected to the nozzle 51 through a pipeline. The delivery pump 52 delivers the cleaning liquid in the cleaning liquid tank 53 to the nozzle 51, and the flow rate is controlled to rinse the side wall and bottom of the reaction chamber 14.

[0030] Vacuum tube 33 may also draw foam into collection tank 32. Therefore, in this embodiment, a nozzle 51 is also provided at the top of collection tank 32, which is also connected to cleaning liquid tank 53. A valve is installed on the pipeline. In this embodiment, a three-way valve is installed on the pipeline after delivery pump 52, which branches into two branches, leading to the nozzle at the top of the reactor and the nozzle in collection tank 32 respectively. The nozzle pipeline at the top of collection tank 32 is opened in time as needed to spray and defoam the foam entering collection tank 32 at the top of collection tank 32 before it falls to the bottom of the tank. Collection tank 32 is cleaned and discharged regularly. At the same time, collection tank 32 can also be rinsed after the reaction is completed.

[0031] Using the reaction apparatus of this embodiment, during the production of viscose staple fiber oil, the stirring motor 21 and heating device 42 are turned on, and the vacuum pump 35 is started simultaneously. The defoaming chamber 31 draws in the foam generated in the reaction chamber 14, and the airflow causes the defoaming blades 34 to rotate within the defoaming chamber 31, breaking up and defoaming the drawn-in foam. When necessary, foam is drawn from the negative pressure hole 331 into the vacuum tube 33 and then into the collection tank 32. The pipe connecting the cleaning unit 5 to the collection tank 32 is opened, and a small amount of foam drawn into the collection tank 32 is sprayed to defoam and then falls to the bottom of the tank. After the reaction is completed, the stirring motor 21 and heating device 42 are turned off, and the cleaning unit 5 is started to clean the reaction chamber 14 and the collection tank 32. Through the above specific embodiments, the special reaction apparatus for viscose staple fiber oil production of this utility model can effectively solve the problems existing in traditional reaction apparatuses and improve production efficiency and product quality.

[0032] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A reaction apparatus for producing viscose staple fiber oil, comprising a reaction unit (1) and a stirring unit (2), wherein the reaction unit (1) includes a reaction chamber (14) for containing reactants, and the stirring unit (2) is inserted into the reaction chamber (14) to stir the reactants in the reaction chamber (14), characterized in that: It also includes a defoaming unit (3), which includes a defoaming chamber (31), a collection tank (32), a vacuum tube (33), defoaming blades (34), and a vacuum pump (35): The defoaming chamber (31) is located above the surface of the reactant liquid in the reaction chamber (14), and its surface is provided with bubble-absorbing holes (311). The collection tank (32) is a sealed container located outside the reaction unit (1); The vacuum tube (33) has an open end and a closed end. The open end is connected to the collection tank (32), and the closed end is inserted into the defoaming chamber (31). The tube wall of the vacuum tube (33) inserted into the defoaming chamber (31) is provided with a negative pressure hole (331). The defoaming blade (34) is located inside the defoaming chamber (31) and can be rotatably sleeved on the outer wall of the vacuum tube (33); A vacuum pump (35) is connected to a collection tank (32) for evacuating the collection tank (32).

2. The special reaction device for producing viscose staple fiber oiling agent according to claim 1, characterized in that: The distance between the bottom of the defoaming chamber (31) and the surface of the reactant liquid in the reaction chamber (14) is 20~30 cm.

3. The special reaction device for producing viscose staple fiber oiling agent according to claim 1, characterized in that: The negative pressure hole (331) is located above the connection between the defoaming blade (34) and the vacuum tube (33).

4. The reaction apparatus for producing viscose staple fiber oiling agent according to claim 1, characterized in that: The diameter of the bubble-absorbing hole (311) is larger than the diameter of the negative pressure hole (331).

5. The reaction apparatus for producing viscose staple fiber oiling agent according to claim 1, characterized in that: The diameter of the bubble-absorbing hole (311) is 5~8 cm, and the diameter of the negative pressure hole (331) is 2~3 cm.

6. The reaction apparatus for producing viscose staple fiber oiling agent according to claim 1, characterized in that: The defoaming blade (34) is rotatably sleeved on the outer wall of the vacuum tube (33) via a bearing.

7. A reaction apparatus for producing viscose staple fiber oil according to any one of claims 1 to 6, characterized in that: The stirring unit (2) includes a stirring motor (21), a stirring shaft (22), a stirring paddle (23), and a wall scraper (24). The stirring motor (21) is located outside the reaction unit (1). The stirring shaft (22) is connected to the stirring motor (21). The stirring motor (21) drives the stirring shaft (22) to rotate. The stirring paddle (23) is an anchor blade, which is fixed on the stirring shaft (22). The rotation of the stirring shaft (22) drives the anchor blade to stir in the reaction chamber (14). The wall scraper (24) is located near the edge of the inner wall of the reaction chamber (14) of the stirring paddle (23). The wall scraper (24) is made of rubber.

8. The reaction apparatus for producing viscose staple fiber oiling agent according to claim 7, characterized in that: The reaction unit (1) is formed by connecting an outer layer (11) and an inner layer (13). The outer layer (11) and the inner layer (13) form a circulation chamber (12), and the space of the inner layer (13) forms a reaction chamber (14). The circulation chamber (12) is filled with circulating liquid to heat the reactants in the reaction chamber (14).

9. A reaction apparatus for producing viscose staple fiber oiling agent according to claim 8, characterized in that: It also includes a temperature electrode (41) and a heating device (42), wherein the temperature electrode (41) is inserted into the reaction chamber (14); and the heating device (42) provides heating circulating liquid to the circulation chamber (12) to form a circulation loop.

10. A reaction apparatus for producing viscose staple fiber oiling agent according to claim 9, characterized in that: It also includes a cleaning unit (5), which includes a nozzle (51), a delivery pump (52) and a cleaning liquid tank (53). There are two nozzles (51), which are respectively located on the top of the reaction chamber (14) and the top of the collection tank (32) of the reaction unit (1). The cleaning liquid tank (53) is connected to the two nozzles (51) through pipes. The cleaning liquid in the cleaning liquid tank (53) is delivered to the nozzles (51) by the delivery pump (52).

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