A method for recycling electronically controlled solid propellant

Abstract

The invention discloses a method for recycling and treating an electrically controlled solid propellant, and belongs to the technical field of solid propellants. The method comprises the following steps: S1, adding water to the solid propellant to be recycled to swell, the swelling temperature is 25-35°C, the swelling time is 12-72h, and after solid-liquid separation, liquid A1 and solid B1 are obtained; S2, liquid A1 is mixed with an organic solvent, and after solid-liquid separation, liquid A3 and solid D1 are obtained; S3, solid B1 is dissolved in deionized water, the dissolution temperature is 65-90°C, and after solid-liquid separation, liquid A4 and solid C2 are obtained; S4, liquid A3 is subjected to reduced pressure distillation at a temperature of 50-80°C to obtain a recycled oxidant; S5, solid D1 is washed with an organic solvent, and dried to obtain a recycled adhesive; S6, solid C2 is washed with hot water at 65-90°C, and dried to obtain a recycled metal fuel. The invention realizes the safe and efficient separation and recovery of the oxidant, adhesive and metal fuel in the electrically controlled solid propellant, and is safe and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of solid propellants, and in particular relates to a recovery and treatment method of an electronically controlled solid propellant. Background Art

[0002] Controlled combustion solid propellant is an important development direction of solid energetic materials. It plays an important role in the adjustable thrust and repeated starting of solid rocket engines. As the power source of the engine, it can significantly improve the mobility and flexibility of weapons. As a new type of electrically responsive controlled combustion solid propellant, electronically controlled solid propellant has the characteristics of burning when powered on, extinguishing when powered off, and real-time adjustable burning rate with changes in applied voltage. It has potential application prospects in the fields of large solid rocket engines, attitude and orbit control engines, and micro-array thrusters.

[0003] Electronically controlled solid propellants have gained attention in the field of variable thrust engines due to their unique electronically controlled combustion characteristics. However, the development of electronically controlled solid propellants is still immature, and the formula and performance need to be continuously improved and perfected. It is still in the laboratory exploration and research stage and is still a long way from engineering application. As a new type of solid propellant, a large number of experiments are required to explore the formula and performance of the propellant during the development process. It is inevitable that problems such as propellant preparation failure and performance not meeting requirements will occur, resulting in a large amount of waste electronically controlled solid propellants. Even for electronically controlled solid propellants with mature formulas, a large amount of waste electronically controlled solid propellants will be generated during production or use due to reasons such as expiration of service, substandard production or internal aging.

[0004] Since electronically controlled solid propellants contain oxidants, adhesives and metal fuels, on the one hand, large amounts of waste will lead to increased research and development costs and waste of resources. On the other hand, waste electronically controlled solid propellants have the risk of combustion or explosion under external stimuli. At the same time, as environmental conditions change, the stability of waste electronically controlled solid propellants will decrease, making them more dangerous. Summary of the invention

[0005] In order to overcome the problems of increased costs, waste of resources, explosion risks, etc. caused by discarded electronically controlled solid propellants in the prior art, the present invention provides a solid propellant recovery and processing method to achieve the recovery and reuse of oxidants, adhesives and metal fuels in discarded electronically controlled solid propellants.

[0006] The present invention includes a method for recycling and treating an electrically controlled solid propellant, comprising the following steps:

[0007] S1, adding water to the solid propellant to be recovered to swell, the swelling temperature is 25-35°C, the swelling time is 12-72h, and after solid-liquid separation, liquid A1 and solid B1 are obtained;

[0008] S2, mixing liquid A1 with an organic solvent, and obtaining liquid A3 and solid D1 after solid-liquid separation;

[0009] S3, dissolving solid B1 in deionized water at a dissolution temperature of 65-90°C, and obtaining liquid A4 and solid C2 after solid-liquid separation;

[0010] S4, distilling the liquid A3 under reduced pressure at a temperature of 50 to 80° C. to obtain a recovered oxidant;

[0011] S5, washing the solid D1 with an organic solvent, and drying to obtain a recovered adhesive;

[0012] S6. Wash the solid C2 with hot water at 65 to 90°C and dry it to obtain the recovered metal fuel.

[0013] Furthermore, S2 comprises the following steps:

[0014] S2.1, centrifugally separating liquid A1 to obtain liquid A2 and solid C1;

[0015] S2.2. Mix liquid A2 with an organic solvent, and after solid-liquid separation, obtain liquid A3 and solid D1.

[0016] Furthermore, S6 also includes washing the solid C1 with hot water at 65 to 90° C. and then drying it to obtain the recovered metal fuel.

[0017] Furthermore, the mass ratio of liquid A1 to organic solvent in S2 is 1:1000-3000.

[0018] Furthermore, S5 also includes subjecting the liquid A4 to reduced pressure distillation to obtain a solid D2, washing the solid D2 with an organic solvent, and drying to obtain a recovered adhesive.

[0019] Furthermore, the mass ratio of solid B1 to deionized water in S3 is 1:2000-6000.

[0020] Furthermore, the organic solvent in S2 is one or a mixture of more than one of methanol, ethanol, dimethyl sulfoxide, N,N-dimethylformamide, acetonitrile, and ethyl acetate.

[0021] Furthermore, the oxidant in S4 is one or a mixture of more than one water-soluble oxidants such as nitrate, perchlorate or ammonium dinitramide.

[0022] Furthermore, the binder in S5 is one or a mixture of more than one of polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, polyethylene oxide or polyvinyl acetate.

[0023] Furthermore, the metal fuel in S6 is one or a mixture of more than one of aluminum, boron or tungsten.

[0024] Beneficial effects of the present invention:

[0025] (1) The present invention utilizes the water solubility of the oxidant in the electronically controlled solid propellant, and dissolves and separates the oxidant from the electronically controlled solid propellant by swelling with water at a condition close to room temperature, thereby avoiding the problem of the oxidant being decomposed by heating during the subsequent separation of the metal fuel and the binder, thereby not destroying the properties of the oxidant, and improving the safety of the recovery process and the stability of the oxidant;

[0026] By utilizing the difference between the oxidant and the binder in the organic solvent, the oxidant and the binder are separated by mixing the liquid obtained after swelling with the organic solvent, and the oxidant and the binder are recovered, thereby improving the purity of the recovered oxidant and the binder;

[0027] Taking advantage of the fact that the binder is soluble in hot water, the hot water dissolves the binder in the solid mixture obtained by swelling, and the binder is separated to obtain the metal fuel. The oxidant and the binder are removed through swelling and hot water treatment, thereby improving the purity of the recovered metal fuel. Furthermore, the excess water and organic solvent in the separated binder can be removed through reduced pressure distillation, and this part of the binder can be recycled.

[0028] (2) The present invention realizes the safe and efficient separation and recovery of the oxidant, binder and metal fuel in the electronically controlled solid propellant, which is safe and environmentally friendly, can improve the utilization rate of waste electronically controlled solid propellant, reduce the cost in the propellant development process, and achieve green and environmentally friendly sustainable development. In addition, the operation method of the present method is simple and easy to operate, and is suitable for large-scale application.

[0029] (3) The present invention effectively, safely and timely treats waste electric-controlled solid propellants by recycling components, thereby preventing the waste electric-controlled solid propellants from burning or exploding under external stimuli, thereby ensuring the safety of research, production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 A flowchart of an electronically controlled solid propellant recovery process in one embodiment of the present invention;

[0031] Attached Figure 2 The present invention is a flowchart of an electronically controlled solid propellant recovery process in another embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] As attached Figure 1 As shown, an embodiment of the present invention provides a method for recycling and treating an electronically controlled solid propellant, comprising the following steps:

[0035] S1, adding water to the solid propellant to be recovered to swell, the swelling temperature is 25-35°C, the swelling time is 12-72h, and after solid-liquid separation, liquid A1 and solid B1 are obtained;

[0036] This step utilizes the water solubility of the oxidant in the electronically controlled solid propellant, and dissolves and separates a large amount of the oxidant from the electronically controlled solid propellant by adding water for swelling at a condition close to room temperature, thereby avoiding the problem of the oxidant being decomposed by heating during the subsequent separation of the metal fuel and the binder. The obtained liquid A1 is used to extract the oxidant and / or the binder, and the obtained solid B1 is used to extract the metal fuel and / or the binder;

[0037] S2, mixing liquid A1 with an organic solvent, and obtaining liquid A3 and solid D1 after solid-liquid separation;

[0038] This step utilizes the difference between the oxidant and the binder in the organic solvent, adds an organic solvent to separate the oxidant and the binder in the liquid A1, and the obtained liquid A3 is used to extract the oxidant, and the obtained solid D1 is used to extract the binder;

[0039] S3, dissolving solid B1 in deionized water at a dissolution temperature of 65-90°C, and obtaining liquid A4 and solid C2 after solid-liquid separation;

[0040] This step uses the fact that the binder is soluble in hot water while the metal fuel is insoluble in water. The hot water dissolves and removes the binder in the solid B1, and further purifies to obtain the solid C2. The obtained solid C2 is used to extract the metal fuel, and the obtained liquid A4 can be further used to extract the binder.

[0041] S4, distilling the liquid A3 under reduced pressure at a temperature of 50 to 80° C. to obtain a recovered oxidant;

[0042] This step will not destroy the properties of the oxidant, ensuring the safety of the recovery process and the stability of the oxidant;

[0043] S5, washing the solid D1 with an organic solvent, and drying to obtain a recovered adhesive;

[0044] In this step, an organic solvent is used to further wash and remove any remaining oxidant in the solid D1, thereby improving the purity of the recovered adhesive.

[0045] S6, washing the solid C2 with hot water at 65-90°C, and drying to obtain the recovered metal fuel;

[0046] In this step, hot water treatment is used to remove any residual binder in the solid C2, thereby improving the purity of the recovered metal fuel.

[0047] The embodiment of the present invention realizes the safe and efficient separation and recovery of the oxidant, binder and metal fuel in the electronically controlled solid propellant, which is safe and environmentally friendly, can improve the utilization rate of the waste electronically controlled solid propellant, reduce the cost in the propellant development process, and achieve green and environmentally friendly sustainable development. In addition, the operation method of the method is simple and easy to operate, and is suitable for large-scale application. By recycling the components, the waste electronically controlled solid propellant is effectively, safely and timely treated, and the waste electronically controlled solid propellant is prevented from burning or exploding under external stimulation, thereby ensuring the safety of research, production and application.

[0048] In a preferred embodiment, step S2 further comprises the following steps:

[0049] S2.1, centrifugally separating liquid A1 to obtain liquid A2 and solid C1;

[0050] Preferably, to ensure the separation effect, the centrifugal speed is 2000-3000 r / min;

[0051] In this step, the solid matter in the liquid A1 is further separated by centrifugal separation to obtain a further purified liquid A2, which is used to extract the oxidant and / or the binder. The obtained solid C1 can be further used to extract the metal fuel.

[0052] S2.2, mixing liquid A2 with an organic solvent, and obtaining liquid A3 and solid D1 after solid-liquid separation;

[0053] This step utilizes the difference between the oxidant and the binder in the organic solvent, and adds an organic solvent to separate the oxidant and the binder in the liquid A2. The obtained liquid A3 is used to extract the oxidant, and the obtained solid D1 is used to extract the binder.

[0054] In this embodiment, the liquid A1 is further purified by centrifugal separation, thereby further ensuring solid-liquid separation and improving the purity of the recovered oxidant and / or adhesive.

[0055] In a preferred embodiment, step S6 further comprises washing the solid C1 with hot water at 65-90°C and drying to obtain recovered metal fuel. In this embodiment, the solid C1 obtained by centrifugation in step S2.1 is recovered and treated to extract the metal fuel therein, thereby improving the recovery rate of the metal fuel in the electronically controlled solid propellant.

[0056] In a preferred embodiment, in step S2, the mass ratio of liquid A1 to organic solvent is 1:1000-3000, ensuring that the amount of organic solvent can fully dissolve the oxidant contained in liquid A1, ensuring the recovery rate of the oxidant, while avoiding waste caused by excessive organic solvent and controlling the recovery cost.

[0057] In a preferred embodiment, in order to ensure the solid-liquid separation effect, step S2 uses centrifugal separation to achieve solid-liquid separation. Preferably, the centrifugal speed is 2000-3000 r / min.

[0058] In a preferred embodiment, step S5 further comprises distilling the liquid A4 under reduced pressure to obtain solid D2, washing the solid D2 with an organic solvent, and drying to obtain a recovered adhesive. In this embodiment, the liquid A4 obtained after the solid-liquid separation in step S3 is recycled to extract the adhesive therein, thereby improving the recovery rate of the adhesive in the electronically controlled solid propellant. Preferably, in order to ensure the recovery rate and improve the purity of the recovered product, the distillation temperature during the reduced pressure distillation is 70 to 90°C.

[0059] In a preferred embodiment, in step S5, the drying temperature is 40-60°C and the drying time is 12-24 hours, so as to ensure that the adhesive recovery process is safe and stable, and the recovered adhesive can be fully dried, thereby improving the recovery rate and purity of the adhesive.

[0060] In a preferred embodiment, in step S6, the drying temperature is 40-60°C and the drying time is 12-24 hours, which ensures that the metal fuel recovery process is safe and stable, and that the recovered metal fuel can be fully dried, thereby improving the recovery rate and purity of the metal fuel.

[0061] In a preferred embodiment, the mass ratio of solid B1 to deionized water in step S3 is 1:2000-6000, ensuring that hot water fully dissolves the binder in solid B1 while preventing waste caused by excessive deionized water and controlling recycling costs.

[0062] In a preferred embodiment, in order to dissolve the oxidant in the liquid A1, the organic solvent in step S2 is one or a mixture of more than one of methanol, ethanol, dimethyl sulfoxide, N,N-dimethylformamide, acetonitrile, and ethyl acetate.

[0063] In a preferred embodiment, in order to realize the recovery of the oxidant in the electronically controlled solid propellant, the oxidant recovered in step S4 is one or a mixture of more than one water-soluble oxidants such as nitrate, perchlorate or ammonium dinitramide.

[0064] In a preferred embodiment, in order to realize the recovery of the binder in the electronically controlled solid propellant, the binder recovered in step S5 is one or a mixture of more than one of polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, polyethylene oxide or polyvinyl acetate.

[0065] In a preferred embodiment, in order to realize the recovery of metal fuel in the electronically controlled solid propellant, the metal fuel recovered in step S6 is one or a mixture of more than one of aluminum, boron or tungsten.

[0066] In a specific embodiment, the recovery of the electronically controlled solid propellant is achieved by the following steps:

[0067] S1. After crushing the electrically controlled solid propellant, place it in deionized water for swelling treatment at a swelling temperature of 25 to 35° C. for a swelling time of 12 to 72 h, and obtain liquid A1 and solid B1 after solid-liquid separation;

[0068] S2, further processing liquid A1, comprising the following steps:

[0069] S2.1, centrifuge the liquid A1 at a centrifugal rate of 2000-3000 r / min to obtain liquid A2 and solid C1;

[0070] S2.2, mixing liquid A2 with an organic solvent, wherein the mass ratio of liquid A2 to organic solvent is 1:1000-3000, stirring thoroughly and filtering to obtain liquid A3 and solid D1;

[0071] S3, placing solid B1 in deionized water, the mass ratio of solid B1 to deionized water is 1:2000-6000, heating temperature is 65-90°C, and after complete dissolution, centrifugation is performed while hot, the centrifugal speed is 2000-3000r / min, to obtain liquid A4 and solid C2;

[0072] S4, distilling the liquid A3 under reduced pressure at a temperature of 50 to 80° C. to remove the organic solvent and obtain a recovered oxidant;

[0073] S5, distilling the liquid A4 under reduced pressure to remove water to obtain solid D2, the distillation temperature is 70-90° C.; washing the solid D1 and solid D2 repeatedly with an organic solvent for 3 times, and then drying them in a vacuum oven at 40-60° C. for 12-24 hours to obtain a recovered adhesive;

[0074] S6. Wash solid C1 and solid C2 repeatedly with hot water at 65-90° C. for three times, filter, and then place in a vacuum oven at 40-60° C. to dry for 12-24 hours to obtain recovered metal fuel.

[0075] Preferably, the crushing process in step S1 is cutting or shredding.

[0076] Example 1

[0077] The electronically controlled solid propellant recycled and processed in this embodiment uses hydroxylamine nitrate as an oxidant, polyvinyl alcohol as a binder, aluminum powder as a metal fuel, and anhydrous methanol as an organic solvent, including the following steps:

[0078] S1. Cut and chop the electric-controlled solid propellant, take 10 g of the crushed electric-controlled solid propellant and place it in 1000 g of deionized water, swell it at 25° C. for 48 hours, and obtain liquid A1-1 and solid B1-1 after solid-liquid separation;

[0079] S2, recycling and processing liquid A1-1, comprising the following steps:

[0080] S2.1, centrifuging the liquid A1-1 at a centrifugal rate of 2000 r / min to obtain a supernatant A2-1 and an aluminum powder precipitate C1-1;

[0081] S2.2, mixing the supernatant A2-1 with anhydrous methanol at a mass ratio of 1:1000, stirring thoroughly and filtering to obtain hydroxylamine nitrate solution A3-1 and polyvinyl alcohol precipitate D1-1;

[0082] S3, placing solid B1-1 in deionized water, the mass ratio of solid B1-1 to deionized water being 1:4000, heating at 80°C, centrifuging while hot after complete dissolution, at a centrifugal speed of 3000 r / min, to obtain polyvinyl alcohol solution A4-1 and aluminum powder precipitate C1-1;

[0083] S4, subjecting the hydroxylamine nitrate solution A3-1 to reduced pressure distillation at a temperature of 65° C. to remove methanol to obtain a final recovered hydroxylamine nitrate solution, i.e., a recovered oxidant;

[0084] S5. After removing water from the polyvinyl alcohol solution A4-1 by vacuum distillation at 90° C., a polyvinyl alcohol precipitate D2-1 is obtained; after repeatedly washing the polyvinyl alcohol precipitate D1-1 and the polyvinyl alcohol precipitate D2-1 with anhydrous methanol for 3 times, the polyvinyl alcohol precipitate D1-1 and the polyvinyl alcohol precipitate D2-1 are placed in a vacuum oven at 50° C. and dried for 12 hours to obtain the final recovered polyvinyl alcohol, i.e., the recovered adhesive;

[0085] S6. The aluminum powder precipitate C1-1 and the aluminum powder precipitate C2-1 are repeatedly washed three times with 80°C hot water, filtered, and then placed in a 50°C vacuum oven for drying for 12 hours to obtain the final recovered aluminum powder, i.e., the recovered metal fuel.

[0086] In this embodiment, the recovery rate of the oxidant hydroxylamine nitrate is 62.5%, and the concentration of hydroxylamine nitrate in the hydroxylamine nitrate solution finally recovered in step S4 is 90%; the recovery rate of the adhesive polyvinyl alcohol is 68%, and the purity is 95%; the recovery rate of the metal fuel aluminum powder is 60%, and the purity is 98%.

[0087] The calculation method of the recovery rate of each component is:

[0088]

[0089] Example 2

[0090] The electronically controlled solid propellant recycled and processed in this embodiment uses lithium perchlorate as an oxidant, polyvinyl alcohol as a binder, boron powder as a metal fuel, and anhydrous ethanol as an organic solvent, and includes the following steps:

[0091] S1. Cut and chop the electric-controlled solid propellant, take 10 g of the crushed electric-controlled solid propellant and place it in 2000 g of deionized water, swell it at 35° C. for 72 h, and obtain liquid A1-2 and solid B1-2 after solid-liquid separation;

[0092] S2, recycling and processing liquid A1-2, comprising the following steps:

[0093] S2.1, centrifuging the liquid A1-2 at a centrifugal rate of 3000 r / min to obtain a supernatant A2-2 and a boron powder precipitate C1-2;

[0094] S2.2, the supernatant A2-2 and anhydrous ethanol are mixed at a mass ratio of 1:3000, stirred thoroughly and filtered to obtain a lithium perchlorate solution A3-2 and a polyvinyl alcohol precipitate D1-2;

[0095] S3, placing solid B1-2 in deionized water, the mass ratio of solid B1-2 to deionized water being 1:6000, heating at 90°C, centrifuging while hot after complete dissolution, at a centrifugal speed of 3000 r / min, to obtain polyvinyl alcohol solution A4-2 and boron powder precipitate C2-2;

[0096] S4, subjecting the lithium perchlorate solution A3-2 to reduced pressure distillation at a temperature of 80° C. to remove ethanol to obtain the final recovered lithium perchlorate crystals, i.e., the recovered oxidant;

[0097] S5, after removing water from the polyvinyl alcohol solution A4-2 by vacuum distillation at 90° C., a polyvinyl alcohol precipitate D2-2 is obtained; after repeatedly washing the polyvinyl alcohol precipitate D1-2 and the polyvinyl alcohol precipitate D2-2 with anhydrous ethanol for 3 times, the polyvinyl alcohol precipitate D1-2 and the polyvinyl alcohol precipitate D2-2 are placed in a vacuum oven at 45° C. and dried for 24 hours to obtain the final recovered polyvinyl alcohol, i.e., the recovered adhesive;

[0098] S6. The boron powder precipitate C1-2 and the boron powder precipitate C2-2 are repeatedly washed three times with 90°C hot water, filtered, placed in a 50°C vacuum oven and dried for 12 hours to obtain the final recovered boron powder particles, i.e., the recovered metal fuel.

[0099] In this embodiment, the recovery rate of the oxidant lithium perchlorate is 75% and the purity is 92%; the recovery rate of the adhesive polyvinyl alcohol is 73% and the purity is 94%; the recovery rate of the metal fuel boron powder is 78% and the purity is 92%.

[0100] Example 3

[0101] The electronically controlled solid propellant recycled and processed in this embodiment uses lithium nitrate as an oxidant, polyvinyl alcohol as a binder, tungsten powder as a metal fuel, and anhydrous ethanol as an organic solvent, including the following steps:

[0102] S1. Cut and chop the electric-controlled solid propellant, take 10 g of the crushed electric-controlled solid propellant and place it in 2500 g of deionized water, swell it at 30° C. for 48 h, and obtain liquid A1-3 and solid B1-3 after solid-liquid separation;

[0103] S2, recycling and processing liquid A1-3, comprising the following steps:

[0104] S2.1, centrifuging the liquid A1-3 at a centrifugal rate of 2500 r / min to obtain a supernatant A2-3 and a tungsten powder precipitate C1-3;

[0105] S2.2, the supernatant A2-3 and anhydrous ethanol are mixed at a mass ratio of 1:2000, stirred thoroughly and filtered to obtain a lithium nitrate solution A3-3 and a polyvinyl alcohol precipitate D1-3;

[0106] S3, placing solid B1-3 in deionized water, the mass ratio of solid B1-3 to deionized water being 1:5000, heating at 85°C, centrifuging while hot after complete dissolution, at a centrifugal speed of 2500r / min, to obtain polyvinyl alcohol solution A4-3 and tungsten powder precipitate C2-3;

[0107] S4, subjecting the lithium nitrate solution A3-3 to reduced pressure distillation at a temperature of 65° C. to remove ethanol to obtain the final recovered lithium nitrate, i.e., the recovered oxidant;

[0108] S5, after removing water from the polyvinyl alcohol solution A4-3 by vacuum distillation at 90° C., a polyvinyl alcohol precipitate D2-3 is obtained; after the polyvinyl alcohol precipitate D1-3 and the polyvinyl alcohol precipitate D2-3 are repeatedly washed with anhydrous methanol for 3 times, they are placed in a vacuum oven at 50° C. and dried for 72 hours to obtain the final recovered polyvinyl alcohol, i.e., the recovered adhesive;

[0109] S6. Wash the tungsten powder precipitate C1-3 and the tungsten powder precipitate C2-3 repeatedly with 85°C hot water for three times, filter them, and dry them in a 40°C vacuum oven for 12 hours to obtain the final recovered tungsten powder particles, i.e., the recovered metal fuel.

[0110] In this embodiment, the recovery rate of the oxidant lithium nitrate is 77% and the purity is 93%; the recovery rate of the binder polyvinyl alcohol is 72% and the purity is 92%; the recovery rate of the metal fuel tungsten powder is 81% and the purity is 96%.

[0111] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0113] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A method for recycling and treating an electronically controlled solid propellant, Features: The following steps are involved: S1. Add water to the solid propellant to be recovered to swell, the swelling temperature is 25-35°C, the swelling time is 12-72h, and after solid-liquid separation, liquid A1 and solid B1 are obtained; S2, mixing liquid A1 with an organic solvent, and obtaining liquid A3 and solid D1 after solid-liquid separation; the mass ratio of liquid A1 to organic solvent is 1:1000-3000; The organic solvent is one or a mixture of more than one of methanol, ethanol, dimethyl sulfoxide, N,N-dimethylformamide, acetonitrile and ethyl acetate; S3, dissolving solid B1 in deionized water at a dissolution temperature of 65-90°C, and obtaining liquid A4 and solid C2 after solid-liquid separation; the mass ratio of solid B1 to deionized water is 1:2000-6000; S4, distilling the liquid A3 under reduced pressure at a temperature of 50-80° C. to obtain a recovered oxidant; The oxidant is one or a mixture of more than one of water-soluble nitrate, water-soluble perchlorate or water-soluble ammonium dinitramide; S5, washing the solid D1 with an organic solvent, and drying to obtain a recovered adhesive; The adhesive is one or a mixture of more than one of polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, polyethylene oxide or polyvinyl acetate; S6, washing the solid C2 with hot water at 65-90°C, and drying to obtain the recovered metal fuel; The metal fuel is one or a mixture of more than one of aluminum, boron or tungsten.

2. A method for recycling an electronically controlled solid propellant according to claim 1, Features: S2 includes the following steps: S2.1, centrifugally separating liquid A1 to obtain liquid A2 and solid C1; S2.

2. Mix liquid A2 with an organic solvent, and after solid-liquid separation, obtain liquid A3 and solid D1.

3. The method for recycling an electrically controlled solid propellant according to claim 1, Features: S6 also includes washing the solid C1 with hot water at 65-90° C. and drying it to obtain the recovered metal fuel.

4. The method for recycling an electrically controlled solid propellant according to claim 1, Features: S5 also includes subjecting the liquid A4 to reduced pressure distillation to obtain a solid D2, washing the solid D2 with an organic solvent, and drying to obtain a recovered adhesive.

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