Filtering device and expanded ammonium nitrate vacuumizing device

Abstract

The utility model discloses a filtering device and an expanded ammonium nitrate vacuumizing device. The device comprises a filtering cavity, a vacuum pipe, a suction filtration pipe and a filtering assembly, wherein the filtering assembly is arranged in the filtering cavity and divides the filtering cavity into a first space and a second space; the vacuum pipe is communicated with the first space; the suction filtration pipe is communicated with the second space; an electromagnetic valve communicated with the vacuum pipe is arranged on the vacuum pipe; during use, the vacuum pipe is communicated with peripheral vacuumizing equipment, and the suction filtration pipe is communicated with a preparation device of expanded ammonium nitrate, so that the vacuum degree requirement during expansion of a saturated ammonium nitrate solution can be ensured; and when the production is finished or the vacuum degree in the production process is smaller than a rated value, the electromagnetic valve is opened, so that the cleaning work of the filtering assembly can be completed under the condition that the filtering cavity is not opened, and the overall production quality and efficiency are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering equipment, and particularly relates to a filtering device and a vacuum pumping device for expanded ammonium nitrate. Background Art

[0002] In the production process of the existing expanded ammonium nitrate explosive, the vacuum degree of the continuous expansion crystallizer needs to be maintained at 0.060-0.065MPa, so that the saturated ammonium nitrate solution can be better expanded into a fluffy porous powdered expanded ammonium nitrate under the action of the expansion agent. However, during the vacuum pump vacuuming process, the expanded ammonium nitrate powder is easily adsorbed on the vacuum pipeline by negative pressure, causing pipeline blockage, thereby affecting the vacuuming pressure, causing the vacuum degree to decrease, and then the expansion is incomplete, and the hard block particles generated are more, which ultimately directly affects the expansion quality of the saturated ammonium nitrate solution. In order to solve this problem, it is necessary to shut down regularly and manually clean the pipeline, which not only reduces production efficiency, but also increases labor intensity. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to provide a filtering component and an expanded ammonium nitrate vacuum pumping device to improve the production quality and production efficiency of expanded ammonium nitrate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A filtering device comprises a filtering chamber, a vacuum tube, a suction filtering tube, and a filtering assembly arranged inside the filtering chamber and dividing the filtering chamber into a first space and a second space;

[0006] The vacuum tube is connected to the first space;

[0007] The suction filtration tube is connected to the second space;

[0008] The vacuum tube is provided with a solenoid valve connected therewith.

[0009] Further, the filter assembly includes a support plate and a filter screen;

[0010] The support plate is connected to the inner wall of the filter chamber;

[0011] The support plate is provided with at least two flow holes;

[0012] The filter holes are all provided with filter nets.

[0013] Further, it also includes a controller and a pressure detector;

[0014] The detection end of the pressure detector is arranged in the second space;

[0015] The solenoid valve and the pressure detector are both electrically connected to the controller.

[0016] Furthermore, the filter chamber is also provided with an inspection cover;

[0017] The inspection cover plate is sealed and connected to the filter chamber.

[0018] Furthermore, a vacuum extraction device for expanded ammonium nitrate is provided, comprising a vacuum pump, a continuous expansion crystallizer and the above-mentioned filtering device;

[0019] The vacuum pump is connected to the first space through a vacuum tube;

[0020] The continuous expansion crystallizer is connected to the second space through a suction filtration tube.

[0021] Furthermore, the number of the filtering devices is at least two.

[0022] The beneficial effects of the utility model are as follows: when the filtering device provided by the utility model is in use, the vacuum tube is connected to the peripheral vacuum pumping equipment, and the suction filter tube is connected to the preparation device of expanded ammonium nitrate, so that the vacuum degree requirement during the expansion of the saturated ammonium nitrate solution can be guaranteed; and when the vacuum degree is less than the rated value at the end of production or during the production process, the solenoid valve is opened, and the cleaning work of the filtering component can be completed without opening the filter chamber, thereby ensuring the overall production quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic structural diagram of a filtering device according to a specific embodiment of the utility model;

[0024] Figure 2 Shown is a top view of a filter assembly according to a specific embodiment of the utility model;

[0025] Figure 3 Shown is a schematic structural diagram of a vacuum pumping device for expanded ammonium nitrate according to a specific embodiment of the utility model;

[0026] Description of labels:

[0027] 1. Filter chamber; 11. Inspection cover;

[0028] 2. Vacuum tube; 21. Solenoid valve;

[0029] 3. Filter tube;

[0030] 4. Filter assembly; 41. Support plate; 42. Filter screen;

[0031] 5. Vacuum pump;

[0032] 6. Continuous expansion crystallization machine. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0034] The most critical concept of the utility model is that the vacuum tube and the suction filter tube are connected to the peripheral vacuum equipment and the preparation device of expanded ammonium nitrate respectively, so as to ensure the vacuum degree requirement during expansion; and when the vacuum degree is less than the rated value at the end of production or during the production process, the solenoid valve is opened to complete the cleaning work of the filter assembly without opening the filter chamber, thereby ensuring the overall production quality and efficiency.

[0035] Please refer to Figures 1 to 3 The filter device provided by the utility model comprises a filter chamber 1, a vacuum tube 2, a suction filter tube 3, and a filter assembly 4 arranged inside the filter chamber 1 and dividing the filter chamber 1 into a first space and a second space;

[0036] The vacuum tube 2 is connected to the first space;

[0037] The suction filter tube 3 is connected to the second space;

[0038] The vacuum tube 2 is provided with a solenoid valve 21 which is in communication therewith.

[0039] Specifically, there are no special requirements for the setting angle of the filter component 4 and the position of the filter component 4 in the filter chamber 1. The filter component 4 only needs to divide the filter chamber 1 into two relatively independent and interconnected first spaces and second spaces. At the same time, there are no special setting requirements for the first space and the second space. The first space and the second space can both be connected to the vacuum tube 2 or the suction tube 3, but the subsequent equipment that can detect the internal air pressure of the filter chamber 1 must be set inside the space connected to the suction tube 3 to ensure the accuracy of the air pressure detection.

[0040] From the above description, it can be seen that the beneficial effects of the utility model are: providing a filtering device, connecting the vacuum tube 2 and the suction filter tube 3 with the peripheral vacuum equipment and the preparation device of expanded ammonium nitrate respectively, so as to ensure the vacuum requirement during expansion; compared with the equipment used in the existing expanded ammonium nitrate preparation process, the solenoid valve 21 can be opened when the vacuum degree is less than the rated value at the end of production or during the production process, so as to complete the cleaning work of the filter component 4 without opening the filter chamber 1, thereby avoiding the problem of reduced vacuum degree caused by pipeline blockage, so as to improve the overall production quality and efficiency; at the same time, because the pipeline is in a negative pressure state, the moment the solenoid valve 21 is opened, the external gas or detergent can be instantly sucked into the filter chamber 1, so that the powder intercepted on the filter component 4 can flow back to the preparation device of expanded ammonium nitrate, so as to achieve the effect of indirect recovery of materials and cost saving.

[0041] Further, the filter assembly 4 includes a support plate 41 and a filter screen 42;

[0042] The support plate 41 is connected to the inner wall of the filter chamber 1;

[0043] The support plate 41 is provided with at least two flow holes;

[0044] The filter holes are all provided with filter screens 42 .

[0045] Preferably, the filter 42 can be in the shape of a net bag. This design enables the filter 42 to reciprocate slightly along the thickness direction of the support plate 41 according to the change of the pipeline pressure, so that the filter 42 can not only intercept more powder, but also indirectly increase the flow area due to the ability to move slightly, prevent the vacuum degree from being quickly reduced due to the rapid accumulation of powder, and thus indirectly reduce the cleaning frequency of the filter 42 to save cleaning costs. The size of the mesh of the filter 42 is adapted to the minimum size of the expanded ammonium nitrate powder that can be intercepted.

[0046] From the above description, it can be seen that the design has made specific improvements to the composition structure of the filter component 4, thereby providing structural support for the filter component 4 to effectively intercept the expanded ammonium nitrate powder, thereby preventing the expanded ammonium nitrate powder from being adsorbed on the vacuum tube 2 and causing pipeline blockage, ultimately affecting the quality of the finished product.

[0047] Furthermore, the above-mentioned filtering device also includes a controller and a pressure detector;

[0048] The detection end of the pressure detector is arranged in the second space;

[0049] The solenoid valve 21 and the pressure detector are both electrically connected to the controller.

[0050] From the above description, it can be seen that the design provides structural support for the filtering device to realize fully automatic cleaning of the filter component 4 according to the pressure change of the pipeline, that is, when the pressure detector detects that the negative pressure value of the pipeline is less than the rated value, it sends an opening signal to the solenoid valve 21 through the controller. Since the pipeline is in a negative pressure state, when the solenoid valve 21 is opened, a large amount of gas or detergent in the external environment can be quickly sucked into the vacuum tube 2, and further flow to the filter component 4, so that the powder intercepted on the filter component 4 flows back to the preparation device of expanded ammonium nitrate, thereby completing the cleaning work of the filter component 4, and at the same time indirectly avoiding the waste of materials.

[0051] Furthermore, the filter chamber 1 is also provided with an inspection cover 11;

[0052] The inspection cover plate 11 is sealedly connected to the filter chamber 1 .

[0053] Preferably, the filter chamber 1 is a cylindrical structure with one end open and the other end closed; the filter chamber 1 and the inspection cover 11 form a hollow interior and a storage space capable of accommodating the filter assembly 4 .

[0054] From the above description, it can be seen that after the production is completed or during the shutdown period, the staff can open the inspection cover 11 to take out the filter assembly 4 to clean the filter assembly 4, so as to ensure the filtering effect of the filter assembly 4; by sealingly connecting the inspection cover 11 with the filter chamber 1, it can be avoided that the peripheral vacuum equipment will leak during the vacuuming of the pipeline, thereby affecting the processing quality of expanded ammonium nitrate.

[0055] The utility model also provides a vacuum extraction device for expanded ammonium nitrate, comprising a vacuum pump 5, a continuous expansion crystallizer 6 and any of the above-mentioned filtering devices;

[0056] The vacuum pump 5 is connected to the first space through the vacuum tube 2;

[0057] The continuous expansion crystallizer 6 is connected to the second space through the suction filtration tube 3.

[0058] From the above description, it can be seen that the design has made specific improvements to the composition structure of the expanded ammonium nitrate vacuum device. The vacuum pump 5 provides structural support for the production process to meet the vacuum degree requirement of 0.060MPa to 0.065MPa, and through the filtering effect of the filtering device, it can avoid the negative pressure from introducing the expanded ammonium nitrate powder in the continuous expanding crystallizer 6 into the vacuum tube 2, thereby clogging the pipeline, reducing the vacuum degree, and thus affecting the final product quality.

[0059] Furthermore, the number of the filtering devices is at least two.

[0060] From the above description, it can be seen that setting up multiple groups of filtering devices can effectively ensure the stability during filtration. That is, when a filtering device is damaged or cannot be cleaned in time, the remaining filtering devices can be used to temporarily replace the problematic filtering device, thereby avoiding large fluctuations in the vacuum degree of the pipeline, so as to improve the stability of the overall processing and ensure the quality of the finished product.

[0061] The filtering device of the utility model can assist the preparation of expanded ammonium nitrate.

[0062] Please refer to Figure 1 to Figure 2 , Embodiment 1 of the present utility model is:

[0063] A filtering device comprises a filtering chamber 1, a vacuum tube 2, a suction filter tube 3, a controller and a pressure detector, and a filtering assembly 4 arranged inside the filtering chamber 1 and dividing the filtering chamber 1 into a first space and a second space; the vacuum tube 2 is connected to the first space; the suction filter tube 3 is connected to the second space; the vacuum tube 2 is provided with a solenoid valve 21 connected thereto; the detection end of the pressure detector is arranged in the second space; the solenoid valve 21 and the pressure detector are both electrically connected to the controller; the filtering chamber 1 is also provided with an inspection cover 11; the inspection cover 11 is sealed and connected to the filtering chamber 1.

[0064] The filter assembly 4 includes a support plate 41 and a filter screen 42 ; the support plate 41 is connected to the inner wall of the filter chamber 1 ; at least two flow holes are provided on the support plate 41 ; and the filter screens 42 are provided in each of the filter holes.

[0065] Please refer to Figure 3 , Embodiment 2 of the present utility model is:

[0066] A vacuum extraction device for expanded ammonium nitrate comprises a vacuum pump 5, a continuous expansion crystallizer 6 and two filtering devices of the first embodiment; the vacuum pump 5 is connected to the first space through a vacuum tube 2; the continuous expansion crystallizer 6 is connected to the second space through a suction filter tube 3.

[0067] The working principle of the utility model is as follows: start the vacuum pump 5, make the vacuum degree in the continuous puffing crystallizer 6 reach 0.06MPa, start the continuous puffing crystallizer 6 to puff and crystallize the saturated ammonium nitrate solution, and generate fluffy and porous puffed ammonium nitrate solid powder; during the continuous operation of the vacuum pump 5, the puffed ammonium nitrate solid powder in the continuous puffing crystallizer 6 enters the filter chamber 1 through the suction filter pipe 3 under the action of negative pressure, and is completely adsorbed and collected by the filter screen 42 of the filter assembly 4, so that the powder can be prevented from further flowing to the vacuum tube 2; when the vacuum degree in production is less than 0.06MPa or after the production is completed, shut down the vacuum pump 5, open the solenoid valve 21 to break the vacuum, so that the solid ammonium nitrate powder adsorbed by the filter screen 42 installed on the support plate 41 passes through the suction filter pipe 3 under the action of atmospheric pressure and falls back into the continuous puffing crystallizer 6, thereby realizing the recycling of materials. After the production is completed or during the shutdown period, the inspection cover 11 can be opened, the filter assembly 4 can be removed, and it can be cleaned to ensure the filtering effect of the subsequent filter assembly 4.

[0068] In summary, the utility model provides a filtering device, which connects the vacuum tube and the suction filter tube to the peripheral vacuum pumping equipment and the preparation device of expanded ammonium nitrate respectively, so as to ensure the vacuum degree requirement during expansion; compared with the equipment used in the existing expanded ammonium nitrate preparation process, the solenoid valve can be opened when the production is completed or the vacuum degree is less than the rated value during the production process, so as to complete the cleaning work of the filter component without opening the filter chamber, thereby avoiding the problem of reduced vacuum degree due to pipeline blockage, so as to improve the overall production quality and efficiency; at the same time, because the pipeline is in a negative pressure state, the external gas or detergent can be instantly sucked into the filter chamber at the moment of opening the solenoid valve, so that the powder stopped on the filter component can flow back to the preparation device of expanded ammonium nitrate, so as to achieve the effect of indirect material recovery and cost saving; the controller and the pressure detector can also be used to cooperate, so that the filtering device can realize full-automatic cleaning of the filter component according to the pressure change of the pipeline, thereby avoiding the vacuum degree reduction caused by the inability to clean the filter component in time, thereby affecting the quality of the finished product.

[0069] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A filtering device, characterized in that: It comprises a filter chamber, a vacuum tube, a suction filter tube, and a filter assembly arranged inside the filter chamber and dividing the filter chamber into a first space and a second space; The vacuum tube is connected to the first space; The suction filtration tube is connected to the second space; The vacuum tube is provided with a solenoid valve connected therewith.

2. The filtering device according to claim 1, characterized in that: The filter assembly includes a support plate and a filter screen; The support plate is connected to the inner wall of the filter chamber; The support plate is provided with at least two flow holes; The flow holes are all provided with filter screens.

3. The filtering device according to claim 1, characterized in that: Also included is a controller and a pressure detector; The detection end of the pressure detector is arranged in the second space; The solenoid valve and the pressure detector are both electrically connected to the controller.

4. The filtering device according to claim 1, characterized in that: The filter chamber is also provided with an inspection cover; The inspection cover plate is sealed and connected to the filter chamber.

5. A vacuum pump for expanded ammonium nitrate, characterized in that: It comprises a vacuum pump, a continuous expansion crystallizer and the filtering device according to any one of claims 1 to 4; The vacuum pump is connected to the first space through a vacuum tube; The continuous expansion crystallizer is connected to the second space through a suction filtration tube.

6. The vacuum pumping device for expanded ammonium nitrate according to claim 5, characterized in that: The number of the filtering devices is at least two.

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