An extruder for the production of a compound oil phase

Abstract

The utility model discloses a kind of for the swelling equipment of composite oil phase production, belong to explosive production technical field.A kind of for the swelling equipment of composite oil phase production, including sequentially connected feed premixing component, swelling reaction tank and vacuum swelling forming cylinder, the feed premixing component includes ammonium nitrate solution delivery pipeline, composite oil phase delivery pipeline and mixed stirring rod, and one end of ammonium nitrate solution delivery pipeline is fixedly connected with one end of composite oil phase delivery pipeline.The utility model passes through conical pipeline, mechanical stirring and static mixer three-stage premixing process, ensures that composite oil phase is evenly dispersed in ammonium nitrate solution with droplet state, lays solid foundation for subsequent formation uniform, delicate swelling matrix, improves the explosion performance of final explosive;Swelling reaction tank is in the collaborative stirring action of frame type wall scraping and high shear.

Description

Technical Field

[0001] This utility model relates to the field of explosives production technology, and more specifically, to an extrusion device for the production of composite oil phases. Background Technology

[0002] In the production of expanded ammonium nitrate explosives, the composite oil phase needs to be efficiently and uniformly mixed and expanded with the ammonium nitrate solution to form an explosive matrix with an ideal microstructure. Existing expansion equipment typically employs simple pipe merging or static mixing in the premixing stage, making it difficult to achieve fine emulsification of the composite oil phase and ammonium nitrate solution at the microscale. This results in uneven expansion reactions, poor product pore structure, and affects the explosive's power and storage stability. Furthermore, materials in the expansion reaction tank are prone to sticking and coking, creating localized overheating points and posing safety hazards. Mixing efficiency is also low. The overall system's energy efficiency and automated safety control level also need improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an expansion device for the production of composite oil phases to solve the above-mentioned deficiencies.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model discloses an expansion device for producing composite oil phases, comprising a feeding premixing component, an expansion reaction tank, and a vacuum expansion forming cylinder connected in sequence. The feeding premixing component includes an ammonium nitrate solution conveying pipeline, a composite oil phase conveying pipeline, and a mixing and stirring rod. One end of the ammonium nitrate solution conveying pipeline is fixedly connected to one end of the composite oil phase conveying pipeline. The composite oil phase conveying pipeline has a conical structure, and the diameter of the end of the composite oil phase conveying pipeline closer to the ammonium nitrate solution conveying pipeline is smaller than that of the other end. The mixing and stirring rod passes through the ammonium nitrate solution conveying pipeline and the composite oil phase conveying pipeline, and is equipped with a spiral blade located in the ammonium nitrate solution conveying pipeline and an inclined stirring rod located in the composite oil phase conveying pipeline. One end of the mixing and stirring rod is connected to a first motor. The expansion reaction tank is equipped with a stirring shaft driven by a second motor, and the stirring shaft is equipped with a frame-type scraper blade and a high-shear blade. The vacuum expansion forming cylinder is equipped with a twin-screw extruder that meshes with each other.

[0006] Preferably, the feed premixing assembly further includes a static mixer and a booster pump. The inlet of the static mixer is connected to the outlet of the composite oil phase conveying pipeline, and the outlet of the static mixer is connected to the top feed port of the expansion reactor via the booster pump.

[0007] Preferably, the expansion reaction tank is provided with a first jacket through which high-temperature heat transfer oil flows, and the bottom of the expansion reaction tank is provided with a material outlet pipe with a valve, which is connected to the feed port of the vacuum expansion forming cylinder.

[0008] Preferably, the vacuum expansion forming cylinder is provided with a second jacket through which high-temperature heat-conducting oil flows.

[0009] Preferably, the end of the vacuum expansion forming cylinder is provided with a discharge die head, and a vacuum component is connected to one side of the vacuum expansion forming cylinder.

[0010] Preferably, the vacuum assembly includes a condenser, a gas-liquid separator, and a vacuum pump connected in sequence via pipes, with the condenser's inlet connected to the vacuum expansion forming cylinder's exhaust port.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0012] 1. This utility model ensures that the composite oil phase is uniformly dispersed in the ammonium nitrate solution in droplet form through a three-stage premixing process of conical pipeline, mechanical stirring and static mixer, which lays a solid foundation for the subsequent formation of a uniform and fine expanded matrix and improves the explosive performance of the final explosive.

[0013] 2. The puffing reaction tank of this utility model adopts a frame-type scraper and a high-shear synergistic stirring action, which not only effectively prevents materials from sticking to the wall and coking and local overheating, eliminating safety hazards, but also achieves efficient emulsification and preliminary reaction of materials, improving production efficiency. The equipment process is continuous, from premixing to vacuum puffing, with no dead corners in material conveying. The twin-screw design ensures the stability of material conveying and shearing in the vacuum section, and the vacuum component maintains the required high vacuum degree, ensuring the stability of the puffing effect. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the puffing equipment for producing composite oil phase according to this utility model;

[0015] Figure 2 This is a cross-sectional view of the puffing equipment for producing composite oil phase according to this utility model;

[0016] Figure 3 This is a structural diagram of the feeding premixing component of this utility model;

[0017] Figure 4 This is a structural diagram showing the connection between the expansion reaction vessel and the vacuum expansion forming cylinder of this utility model.

[0018] In the diagram: 1. Feed premixing assembly; 11. Ammonium nitrate solution conveying pipeline; 12. Composite oil phase conveying pipeline; 13. Mixing rod; 131. Spiral blade; 132. Stirring rod; 14. Static mixer; 15. Booster pump; 2. Expansion reaction tank; 21. Stirring shaft; 22. Frame-type scraper blade; 23. High-shear blade; 24. First jacket; 25. Material outlet pipe; 26. Valve; 3. Vacuum expansion forming cylinder; 31. Twin screw; 32. Discharge die; 33. Vacuum assembly; 34. Second jacket. Detailed Implementation

[0019] 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.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figures 1-4 The present invention provides an expansion device for the production of composite oil phase, comprising a feeding premixing component 1, an expansion reaction tank 2, and a vacuum expansion forming cylinder 3. The feeding premixing component 1 initially mixes ammonium nitrate solution and composite oil phase, and then feeds them into the expansion reaction tank 2 for shear reaction, and finally expands them under vacuum through the vacuum expansion forming cylinder 3.

[0022] Specifically, the feed premixing assembly 1 includes an ammonium nitrate solution conveying pipeline 11, a composite oil phase conveying pipeline 12, and a mixing rod 13. One end of the ammonium nitrate solution conveying pipeline 11 is fixedly connected to one end of the composite oil phase conveying pipeline 12. Both the ammonium nitrate solution conveying pipeline 11 and the composite oil phase conveying pipeline 12 are provided with corresponding material inlets. The composite oil phase conveying pipeline 12 has a conical structure, and the diameter of the end of the composite oil phase conveying pipeline 12 closest to the ammonium nitrate solution conveying pipeline 11 is smaller than that of the other end. The mixing rod 13 penetrates the ammonium nitrate solution conveying pipeline 11 and the composite oil phase conveying pipeline 12, and the mixing rod 13... The mixing rod 13 is positioned inside the ammonium nitrate solution conveying pipeline 11 and is equipped with a spiral blade 131. The mixing rod 13 is positioned inside the composite oil phase conveying pipeline 12 and is equipped with an inclined stirring rod 132. A first motor is installed at one end of the mixing rod 13, which drives the mixing rod 13 to rotate. When the inclined stirring rod 132 rotates, it will generate shearing, impact and segmentation effects on the flowing material. These effects can generate a large number of eddies and turbulence locally, further shearing the large oil droplets formed in the previous stage into finer droplets, greatly increasing the contact area between the two phases and making the mixing more refined and uniform.

[0023] More specifically, the feed premixing assembly 1 also includes a static mixer 14 and a booster pump 15. The static mixer 14 is connected to the outlet of the composite oil phase conveying pipeline 12. The ammonium nitrate solution and the composite oil phase are further mixed in the static mixer 14. After being pressurized by the booster pump 15, the premixed material enters the expansion reaction tank 2 from the top.

[0024] The puffing reaction tank 2 is equipped with a stirring shaft 21, on which a frame-type scraper blade 22 and a high-shear blade 23 are mounted. A second motor is mounted at the upper end of the stirring shaft 21. The second motor drives the stirring shaft 21, causing the outer edge of the frame-type scraper blade 22 to rotate in close contact with the inner wall of the tank, continuously scraping off the material adhering to the wall to prevent coking and overheating. The high-shear blade 23 applies mechanical shearing force to the material, further tearing, crushing, and emulsifying the oil phase and solution to form a uniform emulsion system, and in this process, the initial puffing reaction begins.

[0025] It is important to understand that the puffing reaction tank 2 is equipped with a first jacket 24 on its exterior, and a material outlet pipe 25 is installed at the lower end of the puffing reaction tank 2. A valve 26 is installed inside the material outlet pipe 25, which is connected to the vacuum puffing forming cylinder 3. The vacuum puffing forming cylinder 3 is equipped with a second jacket 34 on its exterior. High-temperature heat transfer oil is circulated inside the second jacket 34 and the first jacket 24 to heat and keep the material warm. Both the second jacket 34 and the first jacket 24 are equipped with heat transfer oil inlets and outlets. The top of the puffing reaction tank 2 is also equipped with a pressure sensor and a safety relief vent to monitor the pressure inside the tank in real time and provide overpressure protection, further ensuring the safe and reliable operation of the equipment.

[0026] The vacuum expansion forming cylinder 3 is equipped with a pair of meshing twin screws 31. The end of the vacuum expansion forming cylinder 3 is equipped with a discharge die 32. A vacuum assembly 33 is provided on one side of the vacuum expansion forming cylinder 3. The vacuum assembly 33 includes a condenser, a gas-liquid separator and a vacuum pump. The material is conveyed, squeezed and sheared by a pair of meshing twin screws 31 in the vacuum expansion forming cylinder 3. The mixture of water vapor and non-condensable gas in the material is extracted from the vacuum expansion forming cylinder 3 by the suction force of the vacuum pump and first enters the condenser. The gas-liquid mixture that has cooled down from the condenser enters the gas-liquid separator. The vacuum pump extracts the small amount of non-condensable gas remaining after condensation from the top outlet of the gas-liquid separator to establish and maintain the stable high vacuum required by the vacuum expansion forming cylinder 3. Finally, the expanded material is sent out through the discharge die 32.

[0027] Working process: Ammonium nitrate solution and composite oil phase enter the ammonium nitrate solution delivery pipeline 11 and composite oil phase delivery pipeline 12 respectively through their material inlets. The first motor drives the mixing rod 13 to rotate. The composite oil phase flows in the conical composite oil phase delivery pipeline 12. Its cross-sectional area change, in conjunction with the inclined stirring rod 132, generates strong turbulence, achieving initial dispersion of the oil phase. At the same time, the spiral blades 131 push the ammonium nitrate solution forward and merge with the dispersed oil phase for initial shear mixing. The mixture enters the static mixer 14 for further static mixing, forming a homogeneous premix. The booster pump 15 pressurizes the premix and pumps it from the top into the expansion reaction tank 2. The second motor drives the stirring shaft 21, which drives the frame-type scraper blades 22 and high-shear blades 23 to rotate at high speed. The frame-type scraper blades 22 continuously scrape off the material adhering to the tank wall to prevent coking and overheating. The high-shear blades 23... Mechanical shearing force is applied to the material to further tear, crush, and emulsify the premixed liquid, forming a uniform emulsion system. Under the heating and heat preservation of the first jacket 24, the initial expansion reaction begins. The reacted material enters the vacuum expansion forming cylinder 3 through the material outlet pipe 25 and valve 26. Under the heat preservation of the second jacket 34, the intermeshing twin screws 31 convey, squeeze, and shear the material. At the same time, the vacuum component 33 works to establish and maintain a high vacuum environment inside the cylinder. The moisture in the material flashes and vaporizes instantly, causing the material volume to expand rapidly and form a loose and porous solid matrix. Finally, the expanded material is continuously extruded and formed through the discharge die 32 at the end.

[0028] 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 process, method, article, or apparatus.

[0029] 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.

Claims

1. An extrusion apparatus for producing composite oil phases, comprising a feed premixing assembly (1), an extrusion reaction tank (2), and a vacuum extrusion forming cylinder (3) connected in sequence, characterized in that, The feed premixing assembly (1) includes an ammonium nitrate solution conveying pipeline (11), a composite oil phase conveying pipeline (12), and a mixing rod (13). One end of the ammonium nitrate solution conveying pipeline (11) is fixedly connected to one end of the composite oil phase conveying pipeline (12). The composite oil phase conveying pipeline (12) has a conical structure, and the diameter of the end of the composite oil phase conveying pipeline (12) closest to the ammonium nitrate solution conveying pipeline (11) is smaller than that of the other end. The mixing rod (13) passes through the ammonium nitrate solution conveying pipeline (11) and the composite oil phase conveying pipeline (12). The pipeline (12) is equipped with a spiral blade (131) located in the ammonium nitrate solution delivery pipeline (11) and an inclined stirring rod (132) located in the composite oil phase delivery pipeline (12). One end of the mixing stirring rod (13) is connected to a first motor. The puffing reaction tank (2) is equipped with a stirring shaft (21) driven by a second motor. The stirring shaft (21) is equipped with a frame-type scraper blade (22) and a high-shear blade (23). The vacuum puffing forming cylinder (3) is equipped with a twin screw (31) that meshes with each other.

2. The puffing equipment for producing composite oil phases according to claim 1, characterized in that, The feed premixing assembly (1) also includes a static mixer (14) and a booster pump (15). The inlet of the static mixer (14) is connected to the outlet of the composite oil phase conveying pipeline (12), and the outlet of the static mixer (14) is connected to the top feed port of the expansion reaction tank (2) through the booster pump (15).

3. The puffing equipment for producing composite oil phases according to claim 1, characterized in that, The expansion reaction tank (2) is provided with a first jacket (24) through which high-temperature heat transfer oil flows. The bottom of the expansion reaction tank (2) is provided with a material outlet pipe (25) with a valve (26). The material outlet pipe (25) is connected to the feed port of the vacuum expansion forming cylinder (3).

4. The puffing equipment for producing composite oil phases according to claim 1, characterized in that, The vacuum expansion forming cylinder (3) is provided with a second jacket (34) through which high-temperature heat-conducting oil flows.

5. The puffing equipment for producing composite oil phases according to claim 1, characterized in that, The end of the vacuum puffing forming cylinder (3) is provided with a discharge die head (32), and a vacuum component (33) is connected to one side of the vacuum puffing forming cylinder (3).

6. The puffing equipment for producing composite oil phases according to claim 5, characterized in that, The vacuum assembly (33) includes a condenser, a gas-liquid separator and a vacuum pump connected in sequence by pipes. The air inlet of the condenser is connected to the air extraction port of the vacuum expansion forming cylinder (3).

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