Arsenic-removed ammonium polyphosphate production device
By designing an ammonium polyphosphate production device combining arsenic desorption reactor and a polymerization reactor, the problem of high arsenic content in traditional production processes is solved, efficient arsenic removal is achieved, operation is simplified, cost is reduced, and product quality and environmental protection effect are improved.
Patent Information
- Application Number
- CN202420658326.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In the production process of traditional ammonium polyphosphate, the raw material polyphosphate often contains arsenic, which leads to a high arsenic content in the final product, which poses a potential threat to human health and environmental safety. The existing arsenic removal technology is not ideal, has complex operation, and is cost-effective.
A production device for desorbent polyphosphate was designed. Combined with a desorbent reactor and a polymerization reactor, the arsenic from the raw materials is removed through the desorbent reactor. The polymerization reactor conducts polymerization to generate ammonium polyphosphate, and the product yield and particle size uniformity are improved through cooling, crushing, screening and other equipment.
It realizes efficient removal of arsenic from ammonium polyphosphate, simplifies the operation process, reduces production costs, significantly improves the quality and safety of the product, and treats waste gas through multi-stage absorption towers to reduce harmful gas emissions and protect the environment.
Smart Images
Figure CN222567715U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of arsenic-removed ammonium polyphosphate production equipment, in particular to a arsenic-removed ammonium polyphosphate production device. Background Art
[0002] As an important chemical substance, ammonium polyphosphate is widely used in many fields such as agriculture, fireproof materials and environmentally friendly flame retardants. However, in the traditional ammonium polyphosphate production process, the arsenic content in the final product ammonium polyphosphate is relatively high because the raw material polyphosphoric acid often contains a certain amount of arsenic. Arsenic is a toxic element that poses a potential threat to human health and environmental safety. Therefore, ammonium polyphosphate with a high arsenic content is restricted in certain application areas.
[0003] In order to reduce the arsenic content in ammonium polyphosphate and improve the quality and safety of the product, it is necessary to improve the traditional production process. At present, although some arsenic removal technologies are applied to the production process of ammonium polyphosphate, these technologies often have problems such as unsatisfactory arsenic removal effect, complicated operation, and high cost. Therefore, the development of a production device that can efficiently remove arsenic from ammonium polyphosphate is of great significance to promoting the sustainable development of the ammonium polyphosphate industry. Utility Model Content
[0004] The purpose of the utility model is to provide a arsenic-removing ammonium polyphosphate production device to solve the problems raised in the above background technology that although some arsenic-removing technologies are applied to the production process of ammonium polyphosphate, these technologies often have the problems of unsatisfactory arsenic-removing effect, complicated operation and high cost.
[0005] To achieve the above-mentioned purpose, the utility model provides a dearsenicified ammonium polyphosphate production device, comprising a dearsenicating reactor and a polymerization reactor, one side of the polymerization reactor is connected to the bottom discharge end of the dearsenicating reactor through a pipeline, the bottom output end of the polymerization reactor is connected to a cooler, the output end of the cooler is connected to a crusher through a product conveyor belt, the top output end of the polymerization reactor is connected to a plate absorption tower through a pipeline, the output end of the plate absorption tower is sequentially connected to a level I absorption tower, a level II absorption tower, and a level III absorption tower, and the top side of the polymerization reactor is connected to a second reactant storage tank through a pipeline.
[0006] Preferably, the top of the arsenic removal reactor is connected to a first reactant storage tank via a pipeline.
[0007] Preferably, a plate-and-frame filter is installed on the pipeline between the polymerization reactor and the arsenic removal reactor.
[0008] Preferably, the top of the arsenic removal reactor is connected to a first raw material storage bin via a first raw material conveyor belt, and the top of the polymerization reactor is connected to a second raw material storage bin via a second raw material conveyor belt.
[0009] Preferably, the output end of the crusher is connected to a screening machine, the coarse material output end of the screening machine is connected to the top of the crusher through a pipeline, and the fine material output end of the screening machine is connected to a packaging machine.
[0010] Preferably, the bottoms of the first-level absorption tower, the second-level absorption tower, and the third-level absorption tower are all connected to a washing liquid tank.
[0011] Preferably, the first-level absorption tower, the second-level absorption tower and the third-level absorption tower are connected in series in sequence, the output end of the third-level absorption tower is connected to an exhaust pipe, and one side of the first-level absorption tower, the second-level absorption tower and the third-level absorption tower is connected to an acid storage tank through a pipeline.
[0012] Preferably, an ammonia evaporator is installed on the pipeline between the polymerization reactor and the second reactant storage tank.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] In the arsenic removal ammonium polyphosphate production device, by combining the arsenic removal reactor and the polymerization reactor, the efficient removal of arsenic in the ammonium polyphosphate production process is achieved. The device not only simplifies the operation process and reduces the production cost, but also significantly improves the quality and safety of the product.
[0015] Specifically, the arsenic removal reactor can effectively remove arsenic from the raw materials, ensuring that the arsenic content of the materials entering the polymerization reactor is greatly reduced. The polymerization reactor is responsible for converting the treated raw materials into ammonium polyphosphate. At the same time, through the connected coolers, crushers, screening machines and other equipment, the cooling, crushing and screening of the products are realized, further improving the product yield and particle size uniformity.
[0016] In addition, the device also effectively treats the waste gas generated by the polymerization reactor through the combination of a plate absorption tower and a three-stage absorption tower, preventing the emission of harmful gases and protecting the environment. At the same time, the setting of the acid storage tank allows the useful components in the waste gas to be recycled and reused, improving the utilization rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 It is one of the partial structural schematic diagrams of the utility model;
[0019] Figure 3 This is the second schematic diagram of the partial structure of the utility model;
[0020] Figure 4 This is the third partial structural schematic diagram of the utility model.
[0021] The meaning of each number in the figure is:
[0022] 1. Arsenic removal reactor; 2. Polymerization reactor; 3. First raw material storage bin; 4. First raw material conveyor belt; 5. First reactant storage tank; 6. Second raw material storage bin; 7. Second raw material conveyor belt; 8. Plate and frame filter; 9. Cooler; 10. Product conveyor belt; 11. Ammonia evaporator; 12. Crusher; 13. Second reactant storage tank; 14. Screening machine; 15. Packaging machine; 16. Plate absorption tower; 17. Level I absorption tower; 18. Level II absorption tower; 19. Level III absorption tower; 20. Exhaust pipe; 21. Washing liquid tank; 22. Acid storage tank. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] The utility model provides a dearsenicized ammonium polyphosphate production device, such as Figure 1-Figure 4As shown, it includes a dearsenicizing reactor 1 and a polymerization reactor 2, one side of the polymerization reactor 2 is connected to the bottom discharge end of the dearsenicizing reactor 1 through a pipeline, the bottom output end of the polymerization reactor 2 is connected to a cooler 9, the output end of the cooler 9 is connected to a crusher 12 through a product conveyor belt 10, the top output end of the polymerization reactor 2 is connected to a plate absorption tower 16 through a pipeline, the output end of the plate absorption tower 16 is sequentially connected to a first-level absorption tower 17, a second-level absorption tower 18, and a third-level absorption tower 19, and the top side of the polymerization reactor 2 is connected to a second reactant storage tank 13 through a pipeline. The main function of the dearsenicizing reactor 1 is to remove arsenic from the raw material. Arsenic is a harmful element, and its presence may affect the subsequent reaction and the performance of the product. Therefore, before the raw material enters the polymerization reactor, it needs to be dearsenified. The polymerization reactor 2 is the core part of the entire process, where the raw material undergoes a polymerization reaction to generate a polymer compound. The polymerization reaction usually requires certain temperature, pressure and catalyst conditions. The design of the reactor should ensure the stability and controllability of the reaction conditions to improve the quality and yield of the product. The product output from the bottom of the polymerization reactor 2 by the cooler 9 is usually at a high temperature. In order to facilitate subsequent processing and transportation, it needs to be cooled first. The function of the cooler 9 is to cool the high-temperature product to a suitable temperature. The cooling method can be water cooling, air cooling or other methods, depending on the properties of the product and the process requirements. The cooled product is transported to the crusher 12 through the conveyor belt 10. The conveyor belt is a commonly used material handling equipment with the characteristics of continuity, efficiency and stability. Here, it mainly plays the role of transporting the product from the cooler to the crusher. Since the polymer compound generated by the polymerization reaction may be in block or agglomerate form, it is not convenient to directly package and transport, so it needs to be crushed first. The function of the crusher 12 is to crush the large block product into small pieces or powder for subsequent packaging and transportation. Level I absorption tower 17, level II absorption tower 18, level III absorption tower 19: These devices constitute a multi-stage absorption system, which is mainly used to treat the gas output from the top of the polymerization reactor 2. These gases may contain unreacted raw materials, catalysts, solvents and other volatile components. By multi-stage absorption, these useful components can be recovered and recycled, and the discharge of harmful gases can be reduced simultaneously. The second reactant storage tank 13 is used to store the required second reactant of polyreaction. This reactant may be progressively added in the polymerization process, may also be used to regulate the condition or performance of polyreaction. Be connected to one side of the top of polymerization reactor 2 by pipeline, the second reactant can be easily joined in the polyreaction.
[0025] In this embodiment, the top of the arsenic removal reactor 1 is connected to a first reactant storage tank 5 through a pipeline for feeding the reactant into the arsenic removal reactor 1 .
[0026] Specifically, a plate-and-frame filter 8 is installed on the pipeline between the polymerization reactor 2 and the arsenic removal reactor 1 for filtering materials.
[0027] Furthermore, the top of the arsenic removal reactor 1 is connected to a first raw material storage bin 3 via a first raw material conveyor belt 4, and the top of the polymerization reactor 2 is connected to a second raw material storage bin 6 via a second raw material conveyor belt 7 for storing and feeding raw materials.
[0028] Furthermore, the output end of the crusher 12 is connected to a screening machine 14, the coarse material output end of the screening machine 14 is connected to the top of the crusher 12 through a pipeline, and the fine material output end of the screening machine 14 is connected to a packaging machine 15 for packaging.
[0029] Furthermore, the bottoms of the first-stage absorption tower 17, the second-stage absorption tower 18, and the third-stage absorption tower 19 are all connected to a washing liquid tank 21 to collect the washing liquid.
[0030] Furthermore, the first-level absorption tower 17, the second-level absorption tower 18, and the third-level absorption tower 19 are connected in series in sequence, the output end of the third-level absorption tower 19 is connected to the exhaust pipe 20, and one side of the first-level absorption tower 17, the second-level absorption tower 18, and the third-level absorption tower 19 is connected to the acid storage tank 22 through a pipeline.
[0031] Furthermore, an ammonia evaporator 11 is installed on the pipeline between the polymerization reactor 2 and the second reactant storage tank 13 .
[0032] When the arsenic-free ammonium polyphosphate production device of the utility model is used, the raw material is first sent from the first raw material storage bin 3 to the arsenic-free reactor 1 through the first raw material conveyor belt 4. At the same time, the first reactant storage tank 5 sends the reactant to the arsenic-free reactor 1 through the pipeline to perform arsenic-free treatment with the raw material. Arsenic-free is the key to this step, because arsenic is a harmful element, and its presence may have an adverse effect on the subsequent polymerization reaction and the performance of the product.
[0033] The material after arsenic removal enters the polymerization reactor 2 through a pipeline, which is the core part of the entire production process. Here, the material undergoes polymerization reaction under specific temperature, pressure and catalyst conditions to generate polymer compounds. In order to ensure the stability and controllability of the reaction conditions, the design of the polymerization reactor 2 is crucial.
[0034] The top of the polymerization reactor 2 receives the raw materials from the second raw material storage bin 6 through the second raw material conveyor belt 7, and receives the reactants from the second reactant storage tank 13 through the pipeline. These reactants may be gradually added during the polymerization process to adjust the conditions or performance of the polymerization reaction. Before adding the reactants, the ammonia evaporator 11 will pre-treat them.
[0035] The bottom output end of the polymerization reactor 2 is connected to a cooler 9, where the high-temperature product is cooled to a suitable temperature for subsequent processing and transportation. The cooled product is sent to a crusher 12 through a product conveyor belt 10, and the crusher breaks the large pieces of product into small pieces or powder for subsequent packaging and transportation.
[0036] At the same time, the top output end of the polymerization reactor 2 is connected to the plate absorption tower 16 through a pipeline to treat the gas generated during the polymerization reaction. These gases are then subjected to multi-stage absorption treatment through the first-stage absorption tower 17, the second-stage absorption tower 18 and the third-stage absorption tower 19 in sequence. This multi-stage absorption system is designed to recover useful components and reduce the emission of harmful gases. The treated gas is finally discharged through the exhaust pipe 20, and the washing liquid is collected in the washing liquid tank 21. Specifically, the acid is pumped into the absorption tower from the acid storage tank 22, sprayed down from the top to contact with the gas in countercurrent, and the gas is purified. The washing water enters the washing liquid tank 21 for recycling and reuse, and the absorption tower is internally circulated through a circulating pump.
[0037] The crushed products enter the screening machine 14 for screening, the coarse materials are sent back to the crusher 12 for further crushing, and the fine materials are sent to the packaging machine 15 for packaging.
[0038] The entire production process not only takes into account the quality and output of the product, but also pays attention to environmental protection and resource recycling, reflecting the green, environmentally friendly and efficient production concept.
[0039] Finally, it should be noted that the electronic components in the first-level absorption tower 17, the second-level absorption tower 18, the third-level absorption tower 19, etc. in this embodiment are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires respectively, and the specific connection means should refer to the working order between the electrical components in the above-mentioned working principle to complete the electrical connection, which are all well-known technologies in the art.
[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A dearsenicated ammonium polyphosphate production device, comprising a dearsenicating reactor (1) and a polymerization reactor (2), characterized in that: One side of the polymerization reactor (2) is connected to the bottom discharge end of the arsenic removal reactor (1) through a pipeline, the bottom output end of the polymerization reactor (2) is connected to a cooler (9), the output end of the cooler (9) is connected to a crusher (12) through a product conveyor belt (10), the top output end of the polymerization reactor (2) is connected to a plate absorption tower (16) through a pipeline, the output end of the plate absorption tower (16) is sequentially connected to a first-level absorption tower (17), a second-level absorption tower (18), and a third-level absorption tower (19), and one side of the top of the polymerization reactor (2) is connected to a second reactant storage tank (13) through a pipeline.
2. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: The top of the arsenic removal reactor (1) is connected to a first reactant storage tank (5) via a pipeline.
3. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: A plate-and-frame filter (8) is installed on the pipeline between the polymerization reactor (2) and the arsenic removal reactor (1).
4. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: The top of the arsenic removal reactor (1) is connected to a first raw material storage bin (3) via a first raw material conveyor belt (4), and the top of the polymerization reactor (2) is connected to a second raw material storage bin (6) via a second raw material conveyor belt (7).
5. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: The output end of the crusher (12) is connected to a screening machine (14), the coarse material output end of the screening machine (14) is connected to the top of the crusher (12) through a pipeline, and the fine material output end of the screening machine (14) is connected to a packaging machine (15).
6. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: The bottoms of the first-level absorption tower (17), the second-level absorption tower (18), and the third-level absorption tower (19) are all connected to a washing liquid tank (21).
7. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: The first-level absorption tower (17), the second-level absorption tower (18), and the third-level absorption tower (19) are connected in series in sequence; the output end of the third-level absorption tower (19) is connected to an exhaust pipe (20); and one side of the first-level absorption tower (17), the second-level absorption tower (18), and the third-level absorption tower (19) is connected to an acid storage tank (22) through a pipeline.
8. The arsenic-removed ammonium polyphosphate production device according to claim 1, characterized in that: An ammonia evaporator (11) is installed on the pipeline between the polymerization reactor (2) and the second reactant storage tank (13).