A continuous method for producing ammonium polyphosphate with a blockage removing device

Abstract

The utility model relates to continuous law ammonium polyphosphate processing equipment technical field, concretely is a kind of continuous law production ammonium polyphosphate is used to block removing device, the quenching air pipeline of quenching air system is equipped with quenching air total valve, the one end of quenching air total valve is connected with several branch pipes, quenching air branch valve is installed on branch pipe, for compressed air introduction three-stage reactor discharge port, quenching solidification is carried out to viscous material;Backblowing system includes one section backblowing pipeline and two section backblowing pipeline, one section backblowing pipeline is equipped with one section backblowing total valve, one section backblowing solenoid valve, two section backblowing pipeline is equipped with two section backblowing total valve, two section backblowing solenoid valve, two section backblowing bypass valve is used to carry out segmented backblowing to three-stage reactor to four-stage reactor feed short pipe, prevent material accumulation and block. Through integration quenching air system, backblowing system, the effective solution to the problem of material conveying process wall sticking, accumulation and blockage is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous ammonium polyphosphate processing equipment, specifically, to an anti-clogging device for continuous production of ammonium polyphosphate. Background Technology

[0002] Ammonium polyphosphate production involves melting and foaming monoammonium phosphate and urea, followed by solidification and pulverization to obtain the finished product. Existing continuous ammonium polyphosphate production systems consist of four-stage screw reactors. In the first and second stages, the solid raw material foams and becomes molten. It then polymerizes into a viscous, lumpy material in the third stage reactor. Finally, the fourth stage reactor cools and crushes the material to obtain the final powdered ammonium polyphosphate product. The materials obtained from the first three stages rely solely on gravity, while the viscous material from the polymerized ammonium polyphosphate lacks the necessary conveying power to reach the fourth stage, causing blockage at the joint between the third and fourth stages. As the material accumulates further, the entire system becomes clogged. Therefore, there is an urgent need to develop an anti-blocking device for the connection between the third and fourth stage reactors in continuous ammonium polyphosphate production. Utility Model Content

[0003] The purpose of this invention is to provide a declogging device for continuous production of ammonium polyphosphate, so as to solve the problem of pipeline blockage due to material blockage in the above-mentioned background technology, and further improve the production capacity and efficiency of continuous production of ammonium polyphosphate.

[0004] To achieve the above objectives, this utility model provides an anti-clogging device for continuous production of ammonium polyphosphate, characterized in that: it includes a quench air system, the quench air system includes a quench air pipeline, a quench air main valve is installed on the quench air pipeline, one end of the quench air main valve is connected to several branch pipelines, and quench air sub-valve is installed on the branch pipelines for introducing compressed air into the outlet of the three-stage reactor to quench and solidify viscous materials;

[0005] The backflush system includes a first-stage backflush gas pipeline and a second-stage backflush gas pipeline. The first-stage backflush gas pipeline is equipped with a first-stage backflush gas main valve and a first-stage backflush solenoid valve. The second-stage backflush gas pipeline is equipped with a second-stage backflush gas main valve and a second-stage backflush solenoid valve. The second-stage backflush bypass valve is used to perform segmented backflushing of the feed pipes from the third-stage reactor to the fourth-stage reactor to prevent material accumulation and blockage.

[0006] Preferably, the quench air system introduces compressed air into the outlet of the three-stage reactor through the coordinated action of the quench air branch valve and the quench air main valve, thereby rapidly cooling and solidifying the viscous material.

[0007] Preferably, a backflush bypass pipe is also installed on the backflush gas pipeline, and a backflush bypass valve is installed on the backflush bypass pipe. The backflush bypass valve and the backflush solenoid valve are connected in parallel.

[0008] Preferably, a two-stage backflush bypass pipe is also installed on the two-stage backflush air pipeline, and a two-stage backflush bypass valve is installed on the two-stage backflush bypass pipe. The two-stage backflush bypass valve is connected in parallel with the two-stage backflush solenoid valve.

[0009] Preferably, one end of the backflush air pipeline is connected to the end of the feed short pipe near the third-stage discharge port.

[0010] Preferably, one end of the two-section backflush air pipeline is connected to one side of the middle of the feed short pipe.

[0011] Preferably, the number of branch pipes is three.

[0012] Preferably, one end of the branch pipeline passes through the outer wall of the feed short pipe and is aligned with the outlet of the third-stage reactor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This anti-clogging device for continuous ammonium polyphosphate production effectively solves the problems of material sticking, accumulation, and blockage during material conveying by integrating a quench air system, a backflush system, a feed pipe, and an intelligent control system. The quench air system rapidly cools and solidifies viscous materials, reducing their adhesion during transport. The backflush system effectively prevents material accumulation and blockage in the third and fourth-stage feed pipes through segmented backflush. The introduction of the intelligent control system enables precise control of the entire anti-clogging process, improving production efficiency and ensuring the safe and stable operation of the device. In summary, this invention significantly improves the smoothness and reliability of the continuous ammonium polyphosphate production process, reduces production and maintenance costs, and has significant technical and economic benefits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A schematic diagram of the chilled air system and the backflush air system;

[0017] Figure 3 This is a flowchart illustrating the intelligent congestion relief program module in this utility model;

[0018] The meanings of the labels in the diagram are as follows:

[0019] 1. First stage backflush main valve; 2. First stage backflush solenoid valve; 3. First stage backflush bypass valve; 4. Second stage backflush main valve; 5. Second stage backflush solenoid valve; 6. Second stage backflush bypass valve; 7. Feed short pipe; 8. Quenching air branch valve; 9. Quenching air main valve; 10. Quenching air pipeline; 11. Branch pipeline; 12. First stage backflush pipeline; 121. First stage backflush bypass pipe; 13. Second stage backflush pipeline; 131. Second stage backflush bypass pipe. Detailed Implementation

[0020] 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.

[0021] like Figures 1-3 As shown, the continuous process for producing polyphosphoric acid comprises a first-stage reactor, a second-stage reactor, a third-stage reactor, and a fourth-stage reactor connected in series. The first-stage, second-stage, and third-stage reactors are connected sequentially via chutes, while the third-stage and fourth-stage reactors are connected via a feed pipe 7. The first-stage, second-stage, third-stage, and fourth-stage reactors are all twin-screw extruders. The chutes can be installed at an angle or vertically to facilitate the transport of reactants between the reactors, thereby improving production efficiency and reducing equipment investment. The specific reaction process is as follows:

[0022] In the first stage, monoammonium phosphate and urea, mixed in proportion, enter the first-stage reactor, where the melting process of the materials is completed.

[0023] In the second stage, the molten material from the first-stage reactor enters the second-stage reactor through a vertical chute, where the foaming reaction process is completed.

[0024] In the third stage, the molten material from the second-stage reactor enters the third-stage reactor through a vertical chute, where the solidification reaction process is completed.

[0025] In the fourth stage, the solidified material from the third-stage reactor enters the fourth-stage reactor through a vertical chute, where the material is pulverized to obtain qualified ammonium polyphosphate product.

[0026] To reduce the adhesion of viscous materials during the conveying process and effectively prevent the accumulation and blockage of materials in the third- to fourth-stage feed pipes, the equipment is equipped with a de-clogging device for continuous production of ammonium polyphosphate, including a quench air system and a backflush air system.

[0027] The quench air system includes a quench air pipeline 10, a quench air main valve 9 installed on the quench air pipeline 10, and a number of branch pipelines 11 connected to one end of the quench air main valve 9. Each branch pipeline 11 is equipped with a quench air branch valve 8, which is used to introduce compressed air from the factory's main air pipeline into the outlet of the three-stage reactor to quench and solidify viscous materials.

[0028] The backflush system includes a first-stage backflush gas pipeline 12 and a second-stage backflush gas pipeline 13. The first-stage backflush gas pipeline 12 is equipped with a first-stage backflush gas main valve 1 and a first-stage backflush solenoid valve 2. The second-stage backflush gas pipeline 13 is equipped with a second-stage backflush gas main valve 4 and a second-stage backflush solenoid valve 5. The second-stage backflush bypass valve 6 is used to perform segmented backflushing on the feed pipes from the third-stage reactor to the fourth-stage reactor to prevent material accumulation and blockage.

[0029] The intelligent control system includes an intelligent de-blocking program module, which is used to achieve precise control of the de-blocking process.

[0030] By implementing a quench air system, compressed air from the plant's main air duct can be rapidly introduced into the outlet of the third-stage reactor to quickly quench and solidify viscous materials, effectively reducing material adhesion and minimizing the risk of blockage during transport. Simultaneously, the backflushing system employs a segmented backflushing design, enabling targeted cleaning of the feed pipes from the third to the fourth-stage reactors, further preventing material accumulation and blockage. The feed short pipe, as a crucial material transport channel, is designed to ensure smooth material flow from the outlet of the third-stage reactor to the inlet of the fourth-stage reactor. The introduction of an intelligent control system enables precise control of the entire anti-blockage process, improving production efficiency and ensuring the safe and stable operation of the equipment. In summary, this invention significantly improves the smoothness and reliability of the continuous ammonium polyphosphate production process, reduces production and maintenance costs, and possesses significant technical and economic value.

[0031] In this embodiment, the quench air system introduces compressed air into the outlet of the three-stage reactor through the coordinated action of the quench air branch valve 8 and the quench air main valve 9, thereby rapidly cooling and solidifying the viscous material.

[0032] Specifically, a backflush bypass pipe 121 is installed on a section of the backflush gas pipeline 12, and a backflush bypass valve 3 is installed on the backflush bypass pipe 121. The backflush bypass valve 3 is connected in parallel with the backflush solenoid valve 2. The newly added backflush bypass pipe 121 and its associated backflush bypass valve 3 form a parallel connection with the original backflush solenoid valve 2. This design makes the backflush gas system more flexible and reliable. When needed, the backflush bypass valve 3 can be opened to perform targeted backflush on specific sections of the feed pipe from the third-stage reactor to the fourth-stage reactor, thereby more effectively preventing material accumulation and blockage in that area. At the same time, this parallel connection also provides a backup path. When the backflush solenoid valve 2 malfunctions or requires maintenance, the backflush function can be maintained through the backflush bypass valve 3, ensuring the continuity and stability of production. In summary, this design significantly improves the efficiency and reliability of the backflush system, providing a strong guarantee for the smooth operation of the continuous ammonium polyphosphate production process.

[0033] Furthermore, a second-stage backflush bypass pipe 131 is installed on the second-stage backflush air pipeline 13, and a second-stage backflush bypass valve 6 is installed on the second-stage backflush bypass pipe 131. The second-stage backflush bypass valve 6 is connected in parallel with the second-stage backflush solenoid valve 5. The newly added second-stage backflush bypass pipe 131 and its second-stage backflush bypass valve 6 form a parallel configuration with the original second-stage backflush solenoid valve 5. This ingenious design further enhances the flexibility and reliability of the backflush air system. It allows operators to perform targeted backflush operations on another critical section of the third- to fourth-stage feed pipe when needed by opening the second-stage backflush bypass valve 6, thereby more effectively preventing material accumulation and blockage in that area. At the same time, this parallel configuration also provides a backup path for the second-stage backflush solenoid valve 5. When the second-stage backflush solenoid valve 5 malfunctions or requires maintenance, the backflush function can be maintained through the second-stage backflush bypass valve 6, ensuring that the continuity and stability of production are not affected. In summary, this design greatly improves the overall efficiency and reliability of the backflush system, providing a more solid guarantee for the smooth and efficient operation of the continuous ammonium polyphosphate production process.

[0034] Furthermore, one end of a backflush air pipe 12 is connected to the end of the feed short pipe 7 near the third-stage discharge port.

[0035] Furthermore, one end of the second-stage backflush air pipeline 13 is connected to one side of the middle of the feed short pipe 7.

[0036] Furthermore, there are three branch pipes 11 to ensure that air is diverted into the system.

[0037] Preferably, one end of the branch pipe 11 passes through the outer wall of the feed short pipe 7 and is aligned with the third-stage discharge port.

[0038] The specific work process is as follows:

[0039] 1. System Preparation: Before feeding materials into the system, open the main quench air valve and the main backflush air valves for both the first and second stages to introduce compressed air into the pipeline network. Open the bypass valves for the first and second stages of backflush and start continuous purging air to ensure unobstructed pipeline flow.

[0040] 2. Activation of Quenching Air: After the system is fed, open the quenching air valve group to activate the quenching air and perform quenching and solidification treatment on the material. Compressed air is supplied from the factory's main air pipe to the third-stage discharge port as quenching air. The quenching air is used to quench and solidify materials with high viscosity, transforming them into non-sticky solids, thereby preventing material adhesion and accumulation in the pipeline.

[0041] 3. Intelligent Anti-clogging Program Operation: In the program start / stop and parameter setting module, set the purging time and cycle waiting time for the first and second stage backflush solenoid valves. Click the program start button to activate the intelligent anti-clogging program. The program automatically opens and closes the first and second stage backflush valves according to the set logical sequence, performing targeted backflush operations on the feed pipe. By repeatedly executing the above operations, the continuous unobstructed flow of the feed pipe is ensured, preventing material accumulation and blockage.

[0042] A first and second stage backflush air pipeline is added, and backflush solenoid valves and bypass valves are installed on the pipelines to form a parallel system. When material accumulates or blocks in the third- to fourth-stage feed pipe, the intelligent anti-blockage program is activated. The program first opens the first-stage backflush valve, blows for 10 seconds, and then closes it. Then, it performs targeted backflush on a specific section of the feed pipe to remove accumulated material. Next, it opens the second-stage backflush valve, blows for 10 seconds, and then closes it to perform backflush on another critical section. The program waits 300 seconds and then repeats the above operation to ensure continuous unobstructed flow in the feed pipe.

[0043] In summary, through innovative quenching and intelligent backflushing processes, the continuous ammonium polyphosphate plant has achieved effective material handling and continuous and stable production from the third-stage outlet to the fourth-stage inlet. It features intelligent programming, good anti-clogging effect, high degree of automation, and convenient operation.

[0044] Finally, it should be noted that the electronic components in the intelligent de-blocking program module and other components in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A declogging device for continuous production of ammonium polyphosphate, characterized in that: The system includes a quench air system, which includes a quench air pipeline (10). A quench air main valve (9) is installed on the quench air pipeline (10). One end of the quench air main valve (9) is connected to several branch pipelines (11). Each branch pipeline (11) is equipped with a quench air sub-valve (8) for introducing compressed air into the outlet of the three-stage reactor to quench and solidify viscous materials. The backflush system includes a backflush gas pipeline (12) and a backflush gas pipeline (13). The first backflush gas pipeline (12) is equipped with a backflush gas main valve (1) and a backflush solenoid valve (2). The second backflush gas pipeline (13) is equipped with a second backflush gas main valve (4) and a second backflush solenoid valve (5). The second backflush gas pipeline (13) is also equipped with a second backflush bypass pipe (131). The second backflush bypass pipe (131) is equipped with a second backflush bypass valve (6). The second backflush bypass valve (6) is connected in parallel with the second backflush solenoid valve (5). The second backflush bypass valve (6) is used to backflush the feed short pipe (7) from the third-stage reactor to the fourth-stage reactor in stages to prevent material accumulation and blockage.

2. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: The quench air system introduces compressed air into the outlet of the three-stage reactor through the coordinated action of the quench air branch valve (8) and the quench air main valve (9) to rapidly cool and solidify the viscous material.

3. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: A backflush bypass pipe (121) is also installed on the backflush air pipeline (12), and a backflush bypass valve (3) is installed on the backflush bypass pipe (121). The backflush bypass valve (3) and the backflush solenoid valve (2) are connected in parallel.

4. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: One end of the backflush gas pipeline (12) is connected to the end of the feed short pipe (7) near the outlet of the third-stage reactor.

5. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: One end of the two-section backflush air pipeline (13) is connected to one side of the middle of the feed short pipe (7).

6. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: The number of the branch pipes (11) is 3.

7. The anti-clogging device for continuous production of ammonium polyphosphate according to claim 1, characterized in that: One end of the branch pipe (11) passes through the outer wall of the feed short pipe (7) and is aligned with the outlet of the third-stage reactor.

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