Firework and cracker waste recycling system

Abstract

The utility model discloses a firework and cracker waste recycling system. Comprising a negative pressure adsorption treatment part, a part for separating potassium perchlorate from waste aluminum powder, a part for separating potassium perchlorate from waste residues, a part for recycling potassium perchlorate and potassium nitrate and a part for treating residues generated by all the parts. According to the firework and firecracker waste recycling system, potassium perchlorate, potassium nitrate, waste sulfur, waste aluminum powder and metal oxide in the firework and firecracker waste can be effectively recycled by recycling the firework and firecracker waste, and all the recycled waste is used as firework and firecracker raw materials after being dried. The system is good in continuity, simple to operate, low in investment cost and simple in equipment layout, and can be popularized and used.

Description

Technical Field

[0001] The utility model relates to the technical field of fireworks and firecracker waste, and in particular to a fireworks and firecracker waste recycling system. Background Art

[0002] Fireworks and firecrackers waste mainly comes from the waste white gunpowder, waste black gunpowder, waste fuse, waste bright beads, waste semi-finished products containing drugs, waste water for washing the ground and washing equipment, and waste raw materials (such as waste potassium perchlorate, waste potassium nitrate, waste sulfur, waste aluminum powder, etc.) that are discarded, left over, or dropped on the ground during the production process of fireworks and firecrackers production enterprises. These wastes are flammable, explosive, and reactive. Improper handling will cause safety accidents and environmental pollution. If their wastewater is discharged at will, it will cause ecological disasters such as excessive perchlorate and heavy metal pollution in the watershed.

[0003] The current method of dealing with fireworks and firecracker waste is to dump the hazardous waste into ponds formed by excavation to eliminate the risk of explosion. When the "pond" is filled, another one is dug, which causes serious exceeding of the perchlorate standard in nearby water basins.

[0004] Therefore, it is necessary to provide a fireworks and firecrackers waste recycling and processing system. Utility Model Content

[0005] The utility model provides a fireworks and firecracker waste recycling and processing system, which comprises a negative pressure adsorption processing part, a potassium perchlorate separation processing part in waste aluminum powder, a potassium perchlorate processing part in separation waste residue, a potassium perchlorate and potassium nitrate recycling part and a residue processing part generated by each part, wherein:

[0006] The negative pressure adsorption treatment part includes negative pressure adsorption of H2S and wastewater containing potassium perchlorate. The H2S treatment part generated after the waste is mixed with water into slurry includes a spray tower. The spray tower has an air inlet, and the air inlet is connected to a container containing the waste and water mixed into slurry. A negative pressure device is installed on the connected pipeline. Under negative pressure conditions, H2S generated after waste sulfur in the waste in the container is added with water is sucked into the spray tower for treatment. The container contains wastewater and waste residue containing potassium perchlorate.

[0007] The potassium perchlorate separation and treatment part of the waste aluminum powder includes a first sedimentation tank, a second sedimentation tank, and a first reactor. After the H2S is treated, the waste water and waste residue enter the first sedimentation tank. The first sedimentation tank is provided with an overflow port to connect to the second sedimentation tank. The second sedimentation tank is connected to the first reactor through a pipeline. The mud in the first sedimentation tank is repeatedly washed and precipitated. The floating waste aluminum powder overflows from the overflow port into the second sedimentation tank. A mud pump a is provided on the pipeline. The mud pump a pumps the floating waste aluminum powder in the second sedimentation tank into the first reactor. The waste aluminum powder is stirred and filtered in the first reactor. The filter residue is dried to become aluminum powder. The filtrate containing potassium perchlorate is added with water and heated to fully dissolve the potassium perchlorate. The waste water containing potassium perchlorate obtained in the first reactor enters the storage tank for storage.

[0008] The potassium perchlorate treatment part in the separated waste residue includes a conical material tank, a crusher, a pulping machine, and a second reactor. The potassium perchlorate and potassium nitrate precipitate produced in the first sedimentation tank is pumped into the conical material tank through a mud pump b. A spiral feeder is arranged between the discharge port of the conical material tank and the feed port of the crusher. The discharge port of the crusher is connected to the pulping machine. The outlet of the pulping machine is connected to the second reactor through a transfer pump. The material pumped into the second reactor is added with water, heated and filtered, and the filtrate enters a storage tank for storage;

[0009] The potassium perchlorate and potassium nitrate recovery part includes a storage tank, a first extraction kettle, a reverse osmosis system, a concentrate tank, and a distillation kettle. The storage tank is connected to the first reaction kettle and the second reaction kettle respectively. The storage tank is connected to the first extraction kettle through a material pump. The first extraction kettle is used to separate the drugs. The supernatant after extraction is pumped into the liquid inlet of the reverse osmosis system through the material pump b. The permeate outlet of the reverse osmosis system outputs fresh water, and the concentrate of the reverse osmosis system is conveyed to the concentrate tank through a pipeline. The distillation kettle is connected to the concentrate tank and negative pressure is provided by a vacuum pump.

[0010] Preferably, the slag processing part generated by each part includes a waste sulfur recovery part, and the waste sulfur recovery part includes a pulping tank, a second extraction kettle, an oil-water separation tank, a vacuum reactor, and a bag filter. The filter residue produced by the second reactor enters the pulping tank, and the pulping tank is connected to the second extraction kettle through a mud pump c. The extract outlet of the second extraction kettle is connected to the oil-water separation tank, and the oil-water separation tank is connected to the vacuum reactor through a pump, and the discharge port of the vacuum reactor is connected to the bag filter.

[0011] Preferably, the slag processing part generated by each part also includes a carbon disulfide recovery part, and the carbon disulfide recovery part includes a third reactor and a condenser. The slag generated by the second extraction kettle is mixed with water and pumped into the third reactor by a mud pump d. The third reactor is connected to the condenser to condense the volatilized carbon disulfide.

[0012] Preferably, the slag processing part produced by each part also includes a sediment recovery part, and the sediment recovery part includes a shaking table. The slag produced by the third reactor is connected to the shaking table through a mud pump d. The sediment separated by the shaking table is used to make unfired bricks, and the slag containing heavy metals such as copper oxide, bismuth trioxide, and strontium carbonate is further recovered and processed.

[0013] Preferably, the slag processing part generated by each part also includes a metal oxide recovery part, and the metal oxide recovery part includes a stirring barrel and a flotation tank. The slag containing heavy metals such as copper oxide, bismuth trioxide, and strontium carbonate generated by the shaking table is connected to the stirring barrel through a mud pump e, and the stirring barrel is connected to the flotation tank through a mud pump f. The floated heavy metal mixture is dried and used as the raw material for bright beads of fireworks, and the remaining slag is used to make unfired bricks.

[0014] Beneficial effects:

[0015] The utility model adopts the above technical solution, and by recycling the waste of fireworks and firecrackers, potassium perchlorate, potassium nitrate, waste sulfur, waste aluminum powder and metal oxides in the waste of fireworks and firecrackers can be effectively recycled, and each recyclable material can be used as the raw material of fireworks and firecrackers after drying. The system of the utility model has good continuity, simple operation, low investment cost and simple equipment layout, and can be promoted for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation mode of the utility model and the beneficial effects of the utility model, the drawings required for use in the implementation mode or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some implementation modes of the utility model. For ordinary technicians in this field, other structures can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the waste sulfur recovery part of the utility model.

[0019] Figure 3 This is a schematic diagram of the partial structure of the utility model for recycling waste aluminum powder.

[0020] Figure 4 This is a schematic diagram of the structure of the reverse osmosis system of the utility model.

[0021] Explanation of the accompanying numbers: barrel for mixing waste and water into slurry -1, spray tower -2, negative pressure device -3, first sedimentation tank -4, second sedimentation tank -5, first reactor -6, conical material tank -7, crusher -8, refiner -9, second reactor -10, potassium perchlorate storage tank -11, first extraction kettle -12, storage tank -13, reverse osmosis system -14, concentrate tank -15, distillation kettle -16, pulping tank -17, second extraction kettle -18, oil-water separation tank -19, vacuum reactor -20, bag filter -21, water tank -22, shaking table -23, stirring barrel -24, flotation tank -25. DETAILED DESCRIPTION

[0022] Specific embodiments of the utility model:

[0023] The present embodiment provides a fireworks and firecracker waste recycling and treatment system, including a negative pressure adsorption treatment part, a potassium perchlorate separation and treatment part in waste aluminum powder, a potassium perchlorate treatment part in waste residue separation, a potassium perchlorate and potassium nitrate recovery part, and a residue treatment part generated by each part, wherein:

[0024] The H2S generated after the fireworks and firecracker waste is mixed with water in a ratio of 1:1 into mud can be absorbed by negative pressure. The treatment part includes a spray tower 2, which has an air inlet. The air inlet is connected to a barrel 1 filled with the mud mixed with waste and water, and a negative pressure device 3 is installed on the connected pipeline. Under negative pressure conditions, the H2S generated after the waste sulfur in the waste in the barrel is added with water is sucked into the spray tower for treatment. The spray head can be sprayed with 20% sodium hydroxide solution and lime water (calcium hydroxide solution). The mud part is waste water and waste residue containing potassium perchlorate;

[0025] The potassium perchlorate separation and treatment part in the waste aluminum powder includes a first sedimentation tank 4, a second sedimentation tank 5, and a first reactor 6. The waste water and waste residue containing potassium perchlorate after H2S treatment and the waste water from the mixed cleaning barrel enter the first sedimentation tank. The first sedimentation tank is provided with an overflow port to connect to the second sedimentation tank. The second sedimentation tank is connected to the first reactor 6 through a pipeline. The waste aluminum powder floating in the mud after washing enters the second sedimentation tank from the overflow port. A mud pump is provided on the pipeline. The mud pump draws the floating waste aluminum powder into the first reactor 6. In the first reactor 6, water is added, stirred, and filtered. The filter residue is dried to become aluminum powder. The potassium perchlorate-containing filtrate is heated to fully dissolve the potassium perchlorate, and the waste water containing potassium perchlorate enters the storage tank for storage.

[0026] The potassium perchlorate treatment part in the separated waste residue includes a conical material tank 7, a crusher 8, a pulping machine 9, and a second reactor 10 (the utility model adopts two reactors, which are No. 1 or No. 2 leaching reactors, and each is connected to a potassium perchlorate storage tank 11). The precipitated waste residue produced in the first sedimentation tank is pumped into the conical material tank through a mud pump, and a spiral feeder is arranged between the discharge port of the conical material tank and the feed port of the crusher. The discharge port of the crusher is connected to the pulping machine, and the outlet of the pulping machine is connected to the second reactor through a mud delivery pump. The material pumped into the second reactor is added with water, heated and filtered, and the filtrate enters the storage tank for storage;

[0027] The potassium perchlorate and potassium nitrate recovery part includes a first extraction kettle 12, a storage tank 13, a reverse osmosis system 14, a concentrate tank 15, and a distillation kettle 16. The storage tank is connected to the first reaction kettle and the second reaction kettle respectively. The storage tank is connected to the first extraction kettle through a material pump. The first extraction kettle is used to separate the drugs. The supernatant after extraction is pumped into the liquid inlet of the reverse osmosis system through a material pump b. The permeate outlet of the reverse osmosis system outputs fresh water, and the concentrate of the reverse osmosis system is conveyed to the concentrate tank through a pipeline. The distillation kettle provides negative pressure through a vacuum pump and is connected to the concentrate tank through a pipeline.

[0028] The slag processing part produced by each part of the utility model includes a waste sulfur recovery part (1 section of slag), and the waste sulfur recovery part includes a pulping tank 17, a second extraction kettle 18, an oil-water separation tank 19, a vacuum reactor 20, and a bag filter 21. The slag produced by the first extraction kettle enters the pulping tank, and the pulping tank is connected to the second extraction kettle through a mud pump. The extract outlet of the second extraction kettle is connected to the oil-water separation tank, and the oil-water separation tank is connected to the vacuum reactor through a pump. The discharge port of the vacuum reactor is connected to the bag filter.

[0029] The slag processing part produced by each part of the utility model also includes a carbon disulfide recovery part, which includes a third reactor and a condenser. The slag produced by the second extraction kettle is mixed with water and then pumped into the third reactor by a mud pump d. The third reactor is connected to the condenser to condense the volatilized carbon disulfide.

[0030] The slag processing part produced by each part of the utility model also includes a sediment recovery part (2-stage slag), and the sediment recovery part includes a shaking table 23. The slag produced by the third reactor is connected to the shaking table through a mud pump.

[0031] The slag processing part produced by each part described in the utility model example also includes a metal oxide recovery part (3-stage slag), and the metal oxide recovery part includes a stirring barrel 24 and a flotation tank 25. The slag produced by the shaking table is connected to the stirring barrel through a mud pump, and the stirring barrel is connected to the flotation tank through a mud pump.

[0032] The treatment method using the above-mentioned fireworks and firecracker waste recycling and treatment system comprises the following steps:

[0033] Step 1: Collection and transportation of fireworks and firecracker waste:

[0034] (1) Fireworks and firecracker waste is considered hazardous waste and must be handled by a dedicated person and vehicle;

[0035] (2) Use special plastic barrels with "opening lids" to hold fireworks and firecracker waste. After fireworks and firecracker waste is placed in the plastic barrels, it must be covered with water for maintenance, and the ratio of residue to water is 4:6 by weight (40% residue, 60% water). Then, mix the fireworks and firecracker waste with water to form slurry, so as to eliminate the safety risks during collection and transportation;

[0036] (3) Waste white gunpowder and waste bright beads must be packed into barrels and soaked in cold water ≤5℃ for several days before they can be loaded onto trucks for transportation. During transportation, the temperature of the materials in the barrels and the water in which the materials are soaked must be kept ≤5℃.

[0037] Step 2: Pretreatment before unloading (treating H2S gas in the barrel):

[0038] Since fireworks and firecracker waste contains "waste sulfur", after adding water, the "waste sulfur" will generate H2S gas under the action of microorganisms and must be disposed of.

[0039] (1) H2S and potassium perchlorate-containing wastewater in negative pressure adsorption barrel:

[0040] (2) Treatment method: Negative pressure adsorption → sent to the spray tower, sprayed with 20-30% NaOH solution and lime water (calcium hydroxide solution) in two stages (or multiple stages) to convert the H2S gas into NaS solution and then into CaS precipitation. The CaS can be recovered after filtration.

[0041] Step 3: Separate potassium perchlorate from the floating waste aluminum powder:

[0042] (1) Mechanical barrel dumping + high-pressure water washing barrel → materials enter the No. 1 pool on the ground:

[0043] (2) The floating waste aluminum powder flows from (Pool No. 1) through the overflow port between Pool No. 1 and Pool No. 2 → into the ground (Pool No. 2);

[0044] (3) After the floating waste aluminum powder enters the ground (Pool No. 2), water is added to Pool No. 2 (to facilitate mud pump transportation), and then the floating waste aluminum powder is pumped into the "filtration reactor" near Pool No. 2 by the mud pump.

[0045] (4) After the floating waste aluminum powder is pumped into the "filtration reactor", water is added to mix the waste aluminum powder into slag with a ratio of 4:6 (i.e. 40% of the suspended liquid); the liquid temperature is heated to 40-60°C with steam, and the potassium perchlorate entrained and residual in the floating waste aluminum powder is quickly dissolved in water and washed out. The waste aluminum powder after separating the potassium perchlorate is dried and used as the raw material for fireworks and firecrackers.

[0046] Step 4: Separate potassium perchlorate from the waste residue and purify it (separation is called medicine):

[0047] (1) The precipitated waste residue material in pool No. 1 is pumped into a conical material tank by a mud pump, and then the material is evenly transferred to the crusher by a (sealed) screw feeder. After the material is crushed, it enters the refiner (refining), and the slurry is then pumped into the "No. 1 or No. 2 leaching reactor" by a mud pump; the above whole process is carried out under water curing;

[0048] Then add water to the "No. 1 or No. 2 leaching reactor" with materials (slurry), adjust the concentration of slag: water to 40%, and then heat with steam to 40-60°C, stir quickly, and fully dissolve the potassium perchlorate entrained and remaining in the materials in water, and wash it out; then filter = slag + aqueous solution containing potassium perchlorate. This operation is repeated many times until the potassium perchlorate in the aqueous solution obtained after filtration no longer exceeds the standard, and all leached water is an aqueous solution containing potassium perchlorate and potassium nitrate, and after reverse osmosis filtration through the reverse osmosis device of this project, pure water comes out;

[0049] (2) Treatment of aqueous solution containing potassium perchlorate - recovery of potassium perchlorate:

[0050] The drug is a kind of effective drug, and its ingredient is "potassium hydrogen phthalate". Potassium perchlorate products cannot have any "potassium hydrogen phthalate" left, otherwise, there will be a combustion and explosion accident, so they must be separated.

[0051] Pump the aqueous solution containing potassium perchlorate into the "drug extraction kettle" and add "lime water", potassium hydrogen phthalate + Ca(OH)2 → calcium phthalate. However, "calcium phthalate" is poorly soluble in water and precipitates out and can be separated. The specific operation is as follows:

[0052] After adding "lime water", control the mixer linear speed at 1.5 m / s, stir for 1 minute, let it stand, a large amount of precipitation will appear and stratify; separate the lower layer of precipitation (called medicine), take the supernatant, which is a relatively pure potassium perchlorate solution. Pump the supernatant to the "supernatant storage tank (200M 3 )” into the reverse osmosis system.

[0053] Step 5: Recover potassium perchlorate and potassium nitrate:

[0054] (1) Pump all the "potassium perchlorate solution" into the potassium perchlorate clear liquid storage tank (60M 3 ), and then pumped to the 10m3 of the reverse osmosis system by using a pipeline pump in a gap compensation manner. 3 Concentrate buffer tank;

[0055] (2) The reverse osmosis system consists of a reverse osmosis device and a 10m 3 The purpose of reverse osmosis is to increase the concentration of potassium perchlorate solution.

[0056] (3) Reverse osmosis process flow: The temperature of the potassium perchlorate solution in the "concentrated water buffer tank" of the reverse osmosis system is controlled at 60°C, and the potassium perchlorate solution in the "concentrated water buffer tank" is pumped to the "reverse osmosis device" by a high-pressure pipeline pump for reverse osmosis. Fresh water (pure water) is continuously discharged, and the concentrated water enters the "concentrated water buffer tank". In this way, the concentration of potassium perchlorate in the "concentrated water buffer tank" becomes higher and higher. When the concentration of potassium perchlorate solution reaches 7%, the reverse osmosis is stopped;

[0057] (4) Recovering potassium perchlorate: When the concentration of potassium perchlorate solution reaches 7%, stop reverse osmosis, use a pipeline pump to pump it to the negative pressure distillation kettle, heat and control the temperature to 60°C, pump the negative pressure to -0.06 MPa, and discharge the steam. The solution in the reactor cannot be drained at one time. The total amount of solution in the reactor must be ≥50% (close to 50%). If it is insufficient, it is necessary to supplement with a potassium perchlorate solution with a concentration of 7%. In this cycle, potassium perchlorate will continue to precipitate during the period, and potassium perchlorate will be recovered intermittently. In short, it can be as follows: vacuum distillation until the total amount of solution is ≈50% → supplement with a potassium perchlorate solution with a concentration of 7% → vacuum distillation until ≈50% → supplement with a potassium perchlorate solution with a content of 7%. During this period, potassium perchlorate will continue to precipitate, and potassium perchlorate will be recovered intermittently;

[0058] (5) Recovering potassium nitrate: Since potassium perchlorate solution contains "potassium nitrate", but the solubility of "potassium nitrate" is much greater than that of potassium perchlorate, the solubility of potassium nitrate at 60°C is 110g potassium nitrate / 100g water. Online monitoring is performed to ensure that the concentration of potassium nitrate in the "negative pressure distillation reactor" is ≤100g potassium nitrate / 100g water. At this time, only potassium perchlorate is precipitated without potassium nitrate;

[0059] When the vacuum distillation time of the reactor is getting longer and longer, the concentration of potassium nitrate is getting higher and higher, and when the concentration of potassium nitrate in the vacuum distillation reactor is 100g potassium nitrate / 100g water, stop replenishing the 7% potassium perchlorate solution, and distill the materials in the vacuum distillation reactor at one time to obtain "potassium nitrate" with higher purity, and recycle potassium nitrate. Potassium nitrate can be used as raw material for fireworks and firecrackers after drying.

[0060] Step 6: 1st stage slag treatment:

[0061] The slag from "Pool No. 1" is pumped to the "leaching reactor" to leach and recover potassium perchlorate and potassium nitrate, and then filtered. The resulting slag is called "stage 1 slag"; "stage 1 slag" contains waste sulfur, metal waste aluminum powder, copper oxide, bismuth oxide, strontium carbonate and other heavy metals, which must continue to be processed and recovered.

[0062] 1st stage slag recovery of waste sulfur:

[0063] (1) Pour the slag of stage 1 into the "slurry tank"; add water to make the slag of stage 1 into a slurry with a solid-liquid ratio of slag: water = 4:6, and use the "slurry pump" to pump it to the "No. 2 extraction kettle"; open the valve between the "No. 1 high-level water tank" and the "No. 2 extraction kettle"; start the "No. 7 pneumatic diaphragm pump" to pump carbon disulfide 3 times the total mass of the waste sulfur in the slag into the "No. 2 extraction kettle"; after pumping, close the CS2 feed pipe and pump. Control the stirring line speed to 1 m / s, stir for 10 minutes, close the valve between the "No. 1 high-level water tank" and the "No. 2 extraction kettle" → filter (No. 2 extraction kettle has a filtering function) to obtain: (CS2 + waste sulfur + water--mixture) + stage 2 slag.

[0064] (2) The mixture of CS2+waste sulfur+water → flows into the "No. 3 conical oil-water separation tank", and is allowed to stand. After CS2 and water phases are separated, the oil phase CS2 is pumped into the No. 4 vacuum reactor → the temperature is raised to 60°C (or 30°C, negative pressure -0.05mpa); CS2 is distilled out, cooled by -20°C chilled water through a condenser, and then cooled into a chilled water tank and the CS2 is recovered for reuse.

[0065] (3) Recovering waste sulfur: After all CS2 has volatilized, close the CS2 volatilization pipeline valve; add "waste sulfur washing water" to "reactor No. 4" and stir to allow the waste sulfur to enter the water phase; start "mud pump No. 8" to pump the (waste sulfur + water) mixture into the "bag filter" to filter out water to obtain waste sulfur. After drying the waste sulfur, use it as raw material for fireworks and firecrackers, with a recovery rate of more than 96%.

[0066] Step 7: 2nd stage slag treatment - recovery of scrap aluminum powder:

[0067] (1) Separation of metal powder from 2-stage slag: The 2-stage slag is made into 40% mud, which is pumped to a shaking table for gravity separation using a mud pump. The separation is mud and sand + metal waste aluminum powder + 3-stage slag; the mud and sand are used to produce "unburned bricks".

[0068] Step 8: 3-stage slag treatment - recovery of metal oxides:

[0069] Since the 3rd stage slag contains heavy metal elements such as copper oxide, bismuth trioxide and strontium carbonate, it must be recycled, otherwise it will pollute the environment. The treatment method is as follows:

[0070] The three sections of slag are made into a 25% concentration slurry, which is pumped into the "slurry adding barrel" with a slurry pump. Under stirring, "20% copper sulfate solution" is added in turn as an "activator" in an amount of 60g / ton of slurry; butyl xanthate is added as a collecting agent in an amount of 700g / ton of slurry; "water glass" is added as an inhibitor in an amount of 100g / ton of slurry; "sulfonated kerosene or dodecanol" is added as a foaming agent in an amount of 50g / ton of slurry, stirred together for 30 minutes, and flowed into the flotation tank. The blowing method and blowing volume of the flotation tank are adjusted; heavy metals such as copper oxide, bismuth oxide, and strontium carbonate are floated out.

[0071] Collect a mixture of heavy metals such as copper oxide, bismuth oxide, strontium carbonate, etc., test the content of each of the copper oxide, bismuth oxide, strontium carbonate, etc. in the mixture after drying, mark it, and use it as raw material for fireworks beads; the process water in the flotation process is reused.

[0072] Since the copper oxide, bismuth trioxide, strontium carbonate and other waste materials in fireworks and firecrackers are of relatively large fineness (about 300 meshes) and have relatively strong activity, they are relatively easy to float and have a relatively high recovery rate (the recovery rate can reach 98%).

[0073] The slag remaining after flotation collects heavy metals such as copper oxide, bismuth trioxide, strontium carbonate, etc. is tested and used to produce "unburned bricks" if it meets the test standards. If the heavy metal residue does not meet the standards, it will be floated again or handed over to a qualified unit for treatment.

[0074] The advantages of this system are:

[0075] Waste aluminum powder, aluminum-magnesium alloy powder, bright beads, etc. in fireworks and firecracker waste are very easy to undergo hydration reaction and are dangerous to explode when exposed to water; therefore, "Pool No. 1" in this device is a "hazardous source" and is arranged in the place farthest from residents in the factory area.

[0076] The "extraction kettle" and "CS2 storage tank" of the "waste sulfur extraction" section both contain CS2, which is a flammable, explosive and volatile organic solvent. Therefore, the "extraction kettle" and "CS2 storage tank" of the "waste sulfur extraction" section are a source of danger. It has been learned in practice that the distance between these two sources of danger needs to be ≥60 meters to ensure safe production.

[0077] This system process utilizes the fact that the solubility of potassium perchlorate is 7% at 60°C, while the solubility of potassium nitrate is 110g potassium nitrate / 100g water. The solubility of potassium nitrate is much greater than that of potassium perchlorate. The mixed solution containing potassium nitrate and potassium perchlorate is subjected to negative pressure distillation to precipitate potassium perchlorate and recover potassium perchlorate.

[0078] This system process utilizes the fact that the solubility of potassium nitrate at 60°C is 110g potassium nitrate / 100g water, which is much greater than the solubility of potassium perchlorate. The mixed solution containing both potassium nitrate and potassium perchlorate is subjected to negative pressure distillation and online monitoring is performed to ensure that the concentration of potassium nitrate in the "negative pressure distillation reactor" is ≤100g potassium nitrate / 100g water. Before that, only potassium perchlorate is precipitated without potassium nitrate.

[0079] When the negative pressure distillation time of the reactor is getting longer and longer, the potassium nitrate concentration is getting higher and higher, and the concentration of potassium nitrate in the "negative pressure distillation reactor" is close to 110g potassium nitrate / 100g water, stop replenishing the potassium perchlorate solution with a solubility of 7%; distill the materials in the negative pressure distillation reactor once to obtain potassium nitrate. The potassium nitrate obtained at this time has the lowest potassium perchlorate content and can be used as raw materials for fireworks and firecrackers.

[0080] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fireworks and firecracker waste recycling and processing system, characterized in that: Negative pressure adsorption treatment part, potassium perchlorate separation and treatment part in waste aluminum powder, potassium perchlorate treatment part in waste slag separation, potassium perchlorate and potassium nitrate recovery part, and slag treatment part generated by each part, including: The negative pressure adsorption treatment part includes negative pressure adsorption of H2S and wastewater containing potassium perchlorate. The H2S treatment part generated after the waste is mixed with water into slurry includes a spray tower. The spray tower has an air inlet, and the air inlet is connected to a container containing the waste and water mixed into slurry. A negative pressure device is installed on the connected pipeline. Under negative pressure conditions, H2S generated after waste sulfur in the waste in the container is added with water is sucked into the spray tower for treatment. The container contains wastewater and waste residue containing potassium perchlorate. The potassium perchlorate separation and treatment part of the waste aluminum powder includes a first sedimentation tank, a second sedimentation tank, and a first reactor. After the H2S is treated, the waste water and waste residue enter the first sedimentation tank. The first sedimentation tank is provided with an overflow port to connect to the second sedimentation tank. The second sedimentation tank is connected to the first reactor through a pipeline. The mud in the first sedimentation tank is repeatedly washed and precipitated. The floating waste aluminum powder overflows from the overflow port and enters the second sedimentation tank. A mud pump a is provided on the pipeline. The mud pump a pumps the floating waste aluminum powder in the second sedimentation tank into the first reactor. In the first reactor, the filter residue is dried to become aluminum powder through stirring, heating, and filtering. The potassium perchlorate-containing filtrate is added with water and heated to fully dissolve the potassium perchlorate. The waste water containing potassium perchlorate obtained in the first reactor enters the storage tank for storage. The potassium perchlorate treatment part in the separated waste residue includes a conical material tank, a crusher, a pulping machine, and a second reactor. The potassium perchlorate and potassium nitrate precipitate produced in the first sedimentation tank is pumped into the conical material tank through a mud pump b. A spiral feeder is arranged between the discharge port of the conical material tank and the feed port of the crusher. The discharge port of the crusher is connected to the pulping machine. The outlet of the pulping machine is connected to the second reactor through a transfer pump. The material pumped into the second reactor is watered, heated and filtered, and the filtrate enters a storage tank for storage; The potassium perchlorate and potassium nitrate recovery part includes a storage tank, a first extraction kettle, a reverse osmosis system, a concentrate tank, and a distillation kettle. The storage tank is connected to the first reaction kettle and the second reaction kettle respectively. The storage tank is connected to the first extraction kettle through a material pump. The first extraction kettle is used to separate the drugs. The supernatant after extraction is pumped into the liquid inlet of the reverse osmosis system through the material pump b. The permeate outlet of the reverse osmosis system outputs fresh water, and the concentrate of the reverse osmosis system is conveyed to the concentrate tank through a pipeline. The distillation kettle is connected to the concentrate tank and negative pressure is provided by a vacuum pump.

2. The fireworks and firecracker waste recycling and processing system according to claim 1 is characterized in that: The slag processing part generated by each part includes a waste sulfur recovery part, and the waste sulfur recovery part includes a pulping tank, a second extraction kettle, an oil-water separation tank, a vacuum reactor, and a bag filter. The filter residue generated by the second reactor enters the pulping tank, and the pulping tank is connected to the second extraction kettle through a mud pump c. The extract outlet of the second extraction kettle is connected to the oil-water separation tank, and the oil-water separation tank is connected to the vacuum reactor through a pump, and the discharge port of the vacuum reactor is connected to the bag filter.

3. The fireworks and firecracker waste recycling and processing system according to claim 2 is characterized in that: The slag processing part produced by each part also includes a carbon disulfide recovery part, which includes a third reactor and a condenser. The slag produced by the second extraction kettle is mixed with water and pumped into the third reactor by a mud pump d. The third reactor is connected to the condenser to condense the volatilized carbon disulfide.

4. The fireworks and firecracker waste recycling and processing system according to claim 3 is characterized in that: The slag processing part produced by each part also includes a sediment recovery part, and the sediment recovery part includes a shaking table. The slag produced by the third reactor is connected to the shaking table through a mud pump d.

5. The fireworks and firecracker waste recycling and processing system according to claim 4 is characterized in that: The slag processing part produced by each part also includes a metal oxide recovery part, which includes a stirring barrel and a flotation tank. The slag produced by the shaking table is connected to the stirring barrel through a mud pump e, and the stirring barrel is connected to the flotation tank through a mud pump f.

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