Vacuum preparation system of expanded ammonium nitrate explosive

Abstract

The utility model discloses a vacuum preparation system for expanded ammonium nitrate explosives, which belongs to the technical field of manufacturing equipment for expanded ammonium nitrate explosives and comprises a crystallizer, a five-bag filter and a mechanical vacuum pump which are sequentially communicated through vacuum tubes. The vacuum tube between the crystallizer and the five-bag filter is linear; the mechanical vacuum pump is adopted as a power source of water vapor in the suction filtration crystallizer, and the problems that an existing water-ring vacuum pump cannot work in a plateau zone and cannot provide the vacuum degree required by reaction for a long time can be effectively solved; and meanwhile, a Y-shaped three-way pipe and a vacuum pipe horizontal section in an existing vacuum system are replaced by the linear vacuum pipe, so that the manufacturing cost of equipment can be saved, the problem of pipeline blockage can be avoided, and the pipeline cleaning frequency is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of manufacturing equipment for expanded ammonium nitrate explosives, and specifically relates to a vacuum preparation system for expanded ammonium nitrate explosives. Background Technology

[0002] Existing expanded ammonium nitrate explosive preparation systems often suffer from the following problems due to their inherent structure:

[0003] 1) Existing puffing crystallizers suffer from slow vacuum rise and insufficient vacuum levels to meet long-term production requirements when operating in high-altitude areas. As production time increases, products produced under low vacuum conditions will clump due to excessive moisture content.

[0004] 2) Existing extrusion crystallizers need to be used in conjunction with Y-type tee pipes, but Y-type tee pipes often experience material blockage, which seriously affects the overall production efficiency.

[0005] 3) In the preparation of existing expanded ammonium nitrate explosives, a vacuum filtration system is needed to continuously extract the water vapor generated during expansion from the expansion crystallizer, ensuring the crystallizer remains under vacuum and the expansion reaction continues. To prevent the extracted water vapor from being directly released into the environment, a Y-type tee pipe is typically connected to a corresponding five-bag filter, with a baffle valve and a horizontal section of the vacuum tube installed between the tee pipe and the filter to filter the water vapor. However, when the water vapor enters the horizontal section of the vacuum tube through the baffle valve, the pipe diameter increases instantaneously, causing the gas flow velocity to drop rapidly. This results in unreacted suspended particles in the water vapor gradually settling in the horizontal section of the vacuum tube. This situation not only requires frequent and thorough flushing of the vacuum pipeline but also poses a risk of burns to workers due to the high temperature of the cleaned material. Utility Model Content

[0006] The technical problem to be solved by this utility model is: how to provide an expanded crystallizer and an expanded ammonium nitrate explosive vacuum system to solve the problems of easy blockage of pipelines and poor quality of finished products.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A vacuum preparation system for expanded ammonium nitrate explosive, characterized in that it comprises a crystallizer, a five-bag filter and a mechanical vacuum pump connected in sequence through a vacuum tube;

[0009] The vacuum tube between the crystallizer and the five-bag filter is straight.

[0010] Furthermore, the discharge end of the crystallizer is equipped with at least two vacuum tubes, and each vacuum tube is connected to a corresponding five-bag filter.

[0011] Furthermore, the diameter of the vacuum tube between the crystallizer and the five-bag filter is 100mm to 200mm.

[0012] Furthermore, it also includes a baffle valve;

[0013] The vacuum tube between the crystallizer and the five-bag filter is connected to the five-bag filter via a baffle valve.

[0014] Furthermore, the crystallizer is provided with at least five injection holes.

[0015] Furthermore, the diameter of the spray nozzle is 5mm to 10mm.

[0016] The beneficial effects of this utility model are as follows: The vacuum preparation system for expanded ammonium nitrate explosive provided by this utility model uses a mechanical vacuum pump as the power source for pumping water and gas inside the crystallizer, which can effectively solve the problems that the existing water ring vacuum pump cannot work in high-altitude areas and cannot provide the vacuum required for the reaction for a long time; at the same time, replacing the Y-type tee pipe and the horizontal section of the vacuum pipe in the existing vacuum system with a straight vacuum pipe can not only save the manufacturing cost of the equipment, but also avoid the problem of pipe blockage, thereby reducing the frequency of pipe cleaning. Attached Figure Description

[0017] Figure 1 The diagram shown is a schematic representation of the vacuum preparation system for expanded ammonium nitrate explosive according to a specific embodiment of this utility model.

[0018] Figure 2 As shown Figure 1 A magnified view of point A;

[0019] Label Explanation:

[0020] 1. Crystallizer;

[0021] 2. Five-bag filters;

[0022] 3. Mechanical vacuum pump;

[0023] 4. Baffle valve;

[0024] 5. Atmospheric condenser. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] The most crucial concept of this invention lies in using a mechanical vacuum pump as the power source for pumping water and air inside the crystallizer. This effectively solves the problems of existing water ring vacuum pumps being unable to work in high-altitude areas and being unable to provide the required vacuum level for long periods of time. At the same time, connecting the crystallizer and the five-bag filter through a straight vacuum tube not only saves on equipment manufacturing costs but also avoids the problem of pipe blockage, thereby reducing the frequency of pipe cleaning.

[0027] Please refer to Figures 1 to 2 The vacuum preparation system for expanded ammonium nitrate explosive provided by this utility model includes a crystallizer 1, a five-bag filter 2 and a mechanical vacuum pump 3 connected in sequence through a vacuum tube;

[0028] The vacuum tube between crystallizer 1 and five-bag filter 2 is straight.

[0029] Specifically, the mechanical vacuum pump 3 of this utility model is a reciprocating mechanical vacuum pump 3; and the number of crystallizer 1, five-bag filter 2 and mechanical vacuum pump 3 can be freely adjusted by the operator according to actual needs.

[0030] As can be seen from the above description, the beneficial effects of this utility model are as follows: It provides a vacuum preparation system for expanded ammonium nitrate explosive, which uses a mechanical vacuum pump 3 as the power source for pumping water and gas inside the crystallizer 1. It can raise the limit vacuum of the system to between -0.067MPa and -0.070MPa in about one minute, and can maintain the vacuum between -0.062MPa and -0.065MPa during production. This effectively solves the problem that the existing water ring vacuum pump cannot work in high-altitude areas and cannot provide the vacuum required for the reaction for a long time, thereby improving product quality and preventing agglomeration. At the same time, replacing the Y-type tee pipe and the horizontal section of the vacuum pipe in the existing vacuum system with a straight vacuum pipe not only saves the manufacturing cost of the equipment, but also avoids the problem of pipe blockage, thereby reducing the frequency of pipe cleaning.

[0031] Furthermore, the discharge end of the crystallizer 1 is equipped with at least two vacuum tubes, and each vacuum tube is connected to a corresponding five-bag filter 2.

[0032] Furthermore, the diameter of the vacuum tube between the crystallizer 1 and the five-bag filter 2 is 100mm to 200mm.

[0033] Specifically, the diameter of the vacuum tube can be 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm or 200mm. Preferably, the diameter of the vacuum tube is 150mm.

[0034] As described above, the design makes specific modifications to the number and size of the vacuum tubes, which can further improve the smoothness of water vapor flow in the vacuum tubes, thereby preventing unreacted suspended particles in the water vapor from settling at the bends of the pipes due to obstruction, thus preventing pipe blockage.

[0035] Furthermore, the aforementioned vacuum preparation system for expanded ammonium nitrate explosive also includes a baffle valve 4;

[0036] The vacuum tube between the crystallizer 1 and the five-bag filter 2 is connected to the five-bag filter 2 through the baffle valve 4.

[0037] As described above, by combining the baffle valve 4 with the vacuum tube, not only can the principle of vacuum breaking and backflow be used to reduce dust accumulation in the fifth-generation filter and vacuum, but the frequency of overall equipment cleaning can also be further reduced. Only the five-bag filter 2 needs to be cleaned after each batch of production is completed, thereby achieving the effect of continuous production around the clock in one production process.

[0038] Furthermore, the crystallizer 1 is equipped with at least five injection holes.

[0039] Furthermore, the diameter of the spray nozzle is 5mm to 10mm.

[0040] Specifically, the diameter of the spray nozzle can be 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. Preferably, the diameter of the spray nozzle can be 6mm.

[0041] As can be seen from the above description, the design further optimizes the structure of the crystallizer 1. By increasing the number and diameter of the spray nozzles, the discharge pressure can be effectively increased, changing the material discharge from the original spray state to a flowing state. After the modification, the suspended particles in the crystallizer are effectively reduced, and the pipe blockage is eliminated.

[0042] Furthermore, the aforementioned vacuum preparation system for expanded ammonium nitrate explosive also includes an atmospheric condenser 5;

[0043] The mechanical vacuum pump 3 and the five-bag filter 2 are connected by an atmospheric condenser 5.

[0044] As described above, atmospheric condensation can effectively condense the high-temperature water vapor filtered by the five-bag filter 2 into a liquid state, so that this condensed water can be replenished to the crystallizer 1 in the subsequent preparation process, thereby saving water resources and reducing manufacturing costs.

[0045] The vacuum preparation system for expanded ammonium nitrate explosive of this invention can assist in the production of expanded ammonium nitrate explosive.

[0046] Please refer to Figures 1 to 2 Embodiment 1 of this utility model is as follows:

[0047] A vacuum preparation system for expanded ammonium nitrate explosive includes a crystallizer 1, a baffle valve 4, a five-bag filter 2, an atmospheric condenser 5, and a mechanical vacuum pump 3, which are connected in sequence via a vacuum tube. The vacuum tube between the crystallizer 1 and the five-bag filter 2 is straight. The discharge end of the crystallizer 1 is provided with two vacuum tubes, each of which is connected to the corresponding five-bag filter 2. The diameter of the vacuum tube between the crystallizer 1 and the five-bag filter 2 is 150 mm. The vacuum tube between the crystallizer 1 and the five-bag filter 2 is connected to the five-bag filter 2 via the baffle valve 4. The crystallizer 1 is provided with five injection holes, the diameter of which can be 6 mm.

[0048] The working principle of this utility model is as follows: When working, starting the mechanical vacuum pump 3 will continuously draw the water vapor generated inside the crystallizer 1 into the five-bag filter 2, ensuring the vacuum level inside the crystallizer 1, and also trapping the unreacted residue in the water vapor in the five-bag filter 2; at the same time, because the vacuum tube connected to the five-bag filter 2 is equipped with a baffle valve 4, the principle of vacuum breaking airflow back suction can be used to reduce the accumulation of dust at the feed inlet and pipe of the five-bag filter, thereby reducing the frequency of equipment cleaning.

[0049] In summary, the vacuum preparation system for expanded ammonium nitrate explosive provided by this utility model uses a mechanical vacuum pump as the power source for removing water vapor from the crystallizer. This allows the system's vacuum level to be raised to between -0.067 MPa and -0.070 MPa in approximately one minute, and the vacuum level can be maintained between -0.062 MPa and -0.065 MPa during production. This effectively solves the problems of existing water ring vacuum pumps being unable to operate in high-altitude areas and unable to provide the required vacuum level for extended periods, thus improving product quality and preventing agglomeration. Furthermore, a straight vacuum tube replaces the Y-type tube in existing vacuum systems. The horizontal sections of the T-junction and vacuum tubes not only save on equipment manufacturing costs but also avoid pipe blockage, thus reducing the frequency of pipe cleaning and directly eliminating the safety risks and hazards of high-temperature burns during equipment cleaning. Furthermore, by combining the baffle valve and vacuum tubes, the principle of vacuum-breaking airflow back suction can be used to reduce dust accumulation in the fifth-generation filter and vacuum, further reducing the frequency of overall equipment cleaning. Only five filter bags need to be cleaned after each batch of production is completed, thereby achieving continuous production around the clock in a single production process, enabling the equipment to produce up to 80 tons per start.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A vacuum preparation system for expanded ammonium nitrate explosive, characterized in that, It includes a crystallizer, five-bag filters, and a mechanical vacuum pump, all connected in sequence via vacuum tubes; The vacuum tube between the crystallizer and the five-bag filter is straight.

2. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 1, characterized in that, The crystallizer has at least two vacuum tubes at the discharge end, and each vacuum tube is connected to a corresponding five-bag filter.

3. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 2, characterized in that, The diameter of the vacuum tube between the crystallizer and the five-bag filter is 100mm to 200mm.

4. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 1, characterized in that, It also includes a baffle valve; The vacuum tube between the crystallizer and the five-bag filter is connected to the five-bag filter via a baffle valve.

5. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 1, characterized in that, The crystallizer is equipped with at least five nozzles.

6. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 5, characterized in that, The diameter of the spray nozzle is 5mm to 10mm.

7. The vacuum preparation system for expanded ammonium nitrate explosive according to claim 1, characterized in that, It also includes atmospheric condensers; The mechanical vacuum pump and the five-bag filter are connected via an atmospheric condenser.

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