Medicament spraying device for solidifying overproof landfill waste

Abstract

The utility model discloses a medicament spraying device for solidifying overproof landfill wastes, and relates to the technical field of solidifying and spraying equipment. The device comprises a device bearing frame body; the bottom of the driving motor is fixedly connected with the top of the device bearing frame body; the input end of the speed reducer is fixedly connected with the output end of the driving motor; the output end of the speed reducer is fixedly connected with a spiral stirring shaft, a U-shaped groove body is arranged outside the spiral stirring shaft, a main chemical box is arranged outside the U-shaped groove body, the inner wall of the main chemical box is fixedly connected with a main stirrer, the outer wall of the bottom of the main chemical box is fixedly connected with a main liquid pump, and the outer wall of the main liquid pump is fixedly connected with a main electric control valve through a pipeline; by means of the spraying device, the use amount of curing agents is reduced, the operation cost is reduced, and meanwhile the treatment efficiency of toxic leaching, heavy metal, inorganic fluoride, corrosive PH and waste with the low standard exceeding value is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solidification spraying equipment, and particularly relates to a medicament spraying device for solidifying over-standard landfill waste. Background Art

[0002] At present, there are mainly two types of hazardous waste landfills, namely flexible and rigid landfills. Among them, the flexible landfill has low cost, relatively mature technology and simple operation, so it has been widely used. However, the requirements for incoming waste are relatively strict, and a large part of hazardous waste needs to be pretreated such as stabilization / solidification before landfill. The main form of the disposal process for stabilized / solidified waste is cement and chelating agent solidification;

[0003] For the over-standard of heavy metal corrosion (PH) in small amounts / trace amounts, single corrosion in small amounts / trace amounts or single heavy metal in small amounts or trace amounts, it is not easy to control the dosage of solid medicament. Adding a small amount may cause the waste and the medicament not to be fully contacted and mixed, and the reaction is not complete, thus failing to play a stabilizing role. While adding too much medicament will increase the disposal cost and at the same time cannot accurately meet the requirement of "reduction" for hazardous waste disposal. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is: a medicament spraying device for solidifying over-standard landfill waste, including: a device bearing frame; a driving motor, the bottom of the driving motor is fixedly connected to the top of the device bearing frame; a speed reducer, the input end of the speed reducer is fixedly connected to the output end of the driving motor; the output end of the speed reducer is fixedly connected with a spiral stirring shaft, an outer part of the spiral stirring shaft is provided with a U-shaped groove body, an outer part of the U-shaped groove body is provided with a main medicament tank, the inner wall of the main medicament tank is fixedly connected with a main stirrer, the outer wall of the bottom of the main medicament tank is fixedly connected with a main liquid pump, and the outer wall of the main liquid pump is fixedly connected with a main electric control valve through a pipeline. This spraying device replaces the traditional cement solidification process device, not only reduces the usage amount of solidification medicament, reduces the operation cost, but also improves the disposal efficiency for waste with low over-standard values of toxicity leaching, heavy metals, inorganic fluorides, and corrosive PH.

[0005] Preferably, the top of the U-shaped groove body is fixedly connected with a feed inlet, the top of the feed inlet is fixedly connected with an inclined feed hopper, the inner wall of one end of the U-shaped groove body far away from the feed inlet is fixedly connected with a discharge outlet, and one end of the spiral stirring shaft far away from the speed reducer is rotationally connected with the top of the device bearing frame through a bearing.

[0006] Preferably, the outer wall of the top of the device load-bearing frame is fixedly connected with a main chemical addition pipeline. The inner wall of the bottom of the main chemical addition pipeline is fixedly connected with a vertical shunt pipeline. The vertical shunt pipeline is symmetrically and fixedly connected with a spray pipeline. The outer wall of the bottom of the spray pipeline is fixedly connected with a solid conical nozzle. The outer wall of the main chemical addition pipeline is connected to the outer wall of the device load-bearing frame. The input end of the main chemical addition pipeline is fixedly connected with a standby electric control valve. The inner wall of the standby electric control valve is fixedly connected with a standby liquid injection pump through a pipeline. The input end of the standby liquid injection pump is fixedly connected with a standby chemical agent tank. The inner wall of the standby chemical agent tank is rotatably connected with a standby stirrer.

[0007] The beneficial effects of the present utility model are as follows:

[0008] 1. By replacing the traditional cement solidification process device with a spray device that allows the chemicals such as spray lime water to fully contact and react with the waste in the spiral stirring, the present utility model not only reduces the usage amount of solidification chemicals and lowers the operation cost, but also improves the disposal efficiency for waste with low exceedance values of toxic leaching, heavy metals, inorganic fluorides, and corrosive pH. Description of the Drawings

[0009] Figure 1 is the front view of the present utility model;

[0010] Figure 2 is the sectional view of the present utility model;

[0011] Figure 3 is the experimental data diagram of the present utility model for traditional treatment of heavy metal sludge;

[0012] Figure 4 is the experimental data diagram of the present utility model for treating heavy metal sludge with spray lime water as a solidifying agent;

[0013] Figure 5 is the experimental data diagram of the present utility model for traditional treatment of heavy metal sludge;

[0014] Figure 6 is the experimental data diagram of the present utility model for treating sludge and dust removal ash with spray lime water as a solidifying agent;

[0015] Figure 7 is the experimental data diagram of the present utility model for treating phosphating slag waste with spray lime water as a solidifying agent.

[0016] In the figure: 1. Device load-bearing frame; 2. Driving motor; 3. Reducer; 4. Feed inlet; 5. Inclined feed hopper; 6. Main electric control valve; 7. Spare electric control valve; 8. Main chemical pipeline; 9. Spraying pipeline; 10. Solid conical nozzle; 11. Vertical shunt pipeline; 12. Spiral stirring shaft; 13. U-shaped trough; 14. Discharge port; 15. Main chemical tank; 16. Spare chemical tank; 17. Main stirrer; 18. Spare stirrer; 19. Main liquid pump; 20. Spare liquid pump. Detailed implementation manners

[0017] The present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners. The embodiments of the present utility model are given for the purpose of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0018] Embodiment: Please refer to Figure 1 - Figure 2 The present utility model provides a technical solution: A chemical spraying device for solidifying over-standard landfill waste, comprising: a device load-bearing frame 1; a driving motor 2, the bottom of the driving motor 2 is fixedly connected to the top of the device load-bearing frame 1; a reducer 3, the input end of the reducer 3 is fixedly connected to the output end of the driving motor 2; the output end of the reducer 3 is fixedly connected to a spiral stirring shaft 12, a U-shaped trough 13 is arranged outside the spiral stirring shaft 12, a main chemical tank 15 is arranged outside the U-shaped trough 13, a main stirrer 17 is fixedly connected to the inner wall of the main chemical tank 15, the outer wall of the bottom of the main chemical tank 15 is fixedly connected to a main liquid pump 19, and the outer wall of the main liquid pump 19 is fixedly connected to a main electric control valve 6 through a pipeline.

[0019] The top of the U-shaped trough 13 is fixedly connected to a feed inlet 4, the top of the feed inlet 4 is fixedly connected to an inclined feed hopper 5, the inner wall of one end of the U-shaped trough 13 away from the feed inlet 4 is fixedly connected to a discharge port 14, and one end of the spiral stirring shaft 12 away from the reducer 3 is rotatably connected to the top of the device load-bearing frame 1 through a bearing.

[0020] On the outer wall of the top of the device bearing frame 1, a main chemical addition pipeline 8 is fixedly connected. On the inner wall of the bottom of the main chemical addition pipeline 8, a vertical shunt pipeline 11 is fixedly connected. The vertical shunt pipeline 11 is symmetrically and fixedly connected with a spray pipeline 9. On the outer wall of the bottom of the spray pipeline 9, a solid conical nozzle 10 is fixedly connected. The outer wall of the main chemical addition pipeline 8 is connected to the outer wall of the device bearing frame 1. The input end of the main chemical addition pipeline 8 is fixedly connected with a standby electric control valve 7. Inside the standby electric control valve 7, a standby liquid injection pump 20 is fixedly connected through a pipeline. The input end of the standby liquid injection pump 20 is fixedly connected with a standby chemical agent tank 16. Inside the standby chemical agent tank 16, a standby stirrer 18 is rotatably connected.

[0021] Working principle:

[0022] The spray device includes a fuselage, a driving device, a reaction stirring device, a spray device, and a chemical addition device. Among them, the fuselage is stabilized by a bearing frame to maintain a stable state. The driving device is also installed on the bearing frame. The reaction stirring device connected to the driving device is inside the fuselage. The spray device for spraying the chemical agent is connected to the upper part of the fuselage. The chemical addition device for preparing the chemical agent is connected to the spray device, and is used for the solidification device for spraying and detoxifying a small amount of landfill waste with excessive infiltration.

[0023] Among them, the fuselage includes an inclined feed hopper 5, a U-shaped trough 13, a feed inlet 4, and a discharge outlet 14. Among them, the inclined feed hopper 5 is connected to the feed inlet 4 whose opening and closing can be controlled inside. The feed inlet 4 is fixed to the upper part of the U-shaped trough 13. A discharge outlet 14 is left at the end of the U-shaped trough 13.

[0024] The driving device includes a driving motor 2 and a speed reducer 3. The driving motor 2 is connected to the speed reducer 3. The power of the driving motor 2 is 22 kw, and the output speed after passing through the speed reducer 3 is 15 r / min.

[0025] The reaction stirring device includes a spiral stirring shaft 12 and the interior of the entire U-shaped trough 13. The spiral stirring shaft 12 is connected to the speed reducer 3 and is stable inside the U-shaped trough 13. Among them, the diameter of the spiral body of the rotating stirring shaft 12 is 600 mm, the thickness of the spiral blade is 8 mm, and the inner diameter of the U-shaped trough is 656 mm. Corrosion-resistant steel is selected for all of them. The top of the spiral stirring shaft 12 is placed on the device bearing frame 1 through a bearing. The device bearing frame 1 is divided into two parts and is located on both sides of the U-shaped trough 13 respectively.

[0026] Spraying device, including a main chemical addition pipeline 8, a vertical shunt pipeline 11, and a spraying pipeline 9; among them, the spraying device is supported by a main chemical addition pipeline 8 passing through the upper part of the device. The upper part of the main chemical addition pipeline 8 is connected to the main electric control valve 6 for chemical addition, and its lower part is connected to 23 vertical shunt pipelines 11 and the corresponding spraying pipelines 9. 10 solid conical nozzles 10 are evenly distributed at the lower part of the spraying pipeline 9, with a jet angle of 43°, a nozzle spraying hole diameter of 1.25 mm, a total of 230, so that the spraying coverage area reaches 2.4 m², covering the entire U-shaped groove cavity.

[0027] Chemical addition device, including a main chemical agent tank 15, a main agitator 17, a main liquid pump 19, a standby chemical agent tank 16, a standby agitator 18, and a standby liquid pump 20. Among them, the material of the standby chemical agent tank is selected as fiberglass reinforced plastic, and it can also be reserved for adding water or other scale inhibitors.

[0028] During use, by controlling the opening and closing of the main electric control valve 6 and the standby electric control valve 7, the dosing of two different chemical agents can be controlled. A main chemical addition pipeline 8 connected to the lower ends of the two valves divides the liquid-solidified chemical agent into 23 vertical shunt pipelines 11, and flows through the vertical shunt pipelines 11 to the spraying pipelines 9. Among them, the spraying pipelines 9 are parallel to each other, and their respective vertical shunt pipelines 11 are perpendicular to each other. 10 solid conical nozzles are evenly distributed at the lower part of the spraying pipeline 9, and the liquid is finally scattered and sprayed out through the nozzles, ensuring that the chemical agent is distributed on the upper surface of the entire U-shaped groove 13 device. Hazardous waste can be poured into the inclined feed hopper 5 manually or by forklift. The waste enters the device through the hopper opening 4 by its own weight. At this time, the chemical agent is sprayed into the U-shaped groove body 13 through the solid conical nozzles 10. The waste liquid is slowly moved in the U-shaped groove body 13 under the agitation of the spiral agitation shaft 12. During this process, the waste and the chemical agent are fully contacted and reacted, and are discharged from the discharge port 14 into the iron trough after being agitated by the spiral. Only after solidification and curing can the waste be safely landfilled;

[0029] When using this device for experimental comparison,

[0030] Heavy metal sludge treatment: For a small amount of excessive corrosive pH value A: Take the heavy metal sludge produced by the electroplating factory, with a physical property of brown and dark brown massive sludge. The pH value measured by a simple fingerprint test is 6 - 7, and the corrosive pH value measured by detection is 3.68 - 6.78. And the results obtained by separating the physical properties of the waste and the original toxicity leaching are as Figure 3 shown;

[0031] For waste with a small amount of excessive pH value in waste toxicity leaching, after being treated by this spraying and solidifying device, the toxicity leaching pH value of each batch of waste is greater than 7, meeting the admission standard required by the landfill. The components used in the experiment and the comparative detection results are as Figure 4 shown;

[0032] Treatment of sludge and dedusting ash: Currently, a small amount of heavy metals exceed the standard (including some wastes with excessive pH values), waste B: sludge B1 / 2 from an automobile manufacturing plant, and dedusting ash B3 / B4 from a chemical plant. Their physical properties are granular and powdery respectively. The pH value measured by simple fingerprint is 4 - 7. After being detected by X-ray fluorescence spectrometer, it contains zinc 34 - 25951 ppm, cadmium 5.71 - 11 ppm, lead 1.7 - 12.1 ppm, and nickel 17 - 8071 ppm. Through the toxicity leaching detection method required by national standards, it is found that heavy metals such as zinc, cadmium, lead, and nickel exceed the standard. The physical properties of the waste and the detailed statistics of the original toxicity leaching are Figure 5 ;

[0033] For waste B with a small amount of heavy metals exceeding the standard (including some wastes with excessive pH values), after being treated by the spraying device used in this case, the pH value of the toxicity leaching of each batch of waste is greater than 7, and the heavy metals all reach below the landfill standard limit value, fully meeting the entry standard required by the landfill. The components used in the experiment and the comparative test results are as Figure 6 shown;

[0034] Treatment of phosphating slag waste: Waste C with a small amount of inorganic fluoride exceeding the standard (including some wastes with excessive pH and a small amount of heavy metals exceeding the standard): Take several batches of phosphating slag waste generated by an auto parts factory. Its physical properties are light yellow and yellow solid wastes. The pH value measured by simple fingerprint is 4 - 7. After being detected by X-ray fluorescence spectrometer, it contains heavy metals zinc 20388 - 62107 ppm, cadmium 6.6 - 8.7 ppm, lead 3.3 - 20 ppm, and nickel 287 - 2772 ppm. Through the toxicity leaching detection method required by national standards, it is found that heavy metals zinc and nickel exceed the standard, and the pH of the toxicity leaching of the waste slightly exceeds the standard. After being treated by the spraying device used in this case, the pH value of the toxicity leaching of each batch of waste is greater than 7, meeting the entry standard required by the landfill. The components used in each experiment and the comparative test results are as Figure 7 shown

[0035] Based on the above cases, it can be shown that for traditional process to dispose of wastes with slightly excessive toxic leaching corrosivity, a small amount of heavy metals, and a small amount of inorganic fluoride exceeding the standard, a large amount of cement is required as a solidifying agent. If the spraying lime water spraying device of this case is used, the dosage of the agent can be reduced, thus reducing the generation amount of the landfilled waste after solidification; using this device not only simplifies the waste disposal and is easy to operate, but also has the advantage of improving the disposal efficiency, thereby reducing the labor and electricity costs. Therefore, the disposal cost of landfilling hazardous wastes is reduced;

[0036] The spray device also has the following advantages: for the large amount of waste with slightly excessive toxicity leaching entering the site, spraying lime water can fully contact with the waste to make the reaction more sufficient. This method can more efficiently achieve the purpose of harmless treatment of waste and meet the requirements of flexible landfill and safe landfill; less chemicals are added, changing the disadvantages of large amount of cement added in the past and difficult to control the dosage of cement; the lime water is solidified by spraying, the average hourly treatment volume increases, and the treatment efficiency of waste is improved. The process device is simple and reliable; the types and addition amounts of chemicals can be adjusted according to the differences in the properties of fly ash of different hazardous waste treatment manufacturers. This spray process device can also be applied to the treatment of various hazardous wastes.

[0037] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative work shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A chemical spraying device for solidifying landfill waste exceeding the standard, characterized in that, Comprising: Device load-bearing frame (1); Driving motor (2), the bottom of the driving motor (2) is fixedly connected to the top of the device load-bearing frame (1); Reducer (3), the input end of the reducer (3) is fixedly connected to the output end of the driving motor (2); The output end of the reducer (3) is fixedly connected with a spiral stirring shaft (12), an external U-shaped groove body (13) is arranged outside the spiral stirring shaft (12), a main medicine tank (15) is arranged outside the U-shaped groove body (13), a main stirrer (17) is fixedly connected to the inner wall of the main medicine tank (15), a main liquid injection pump (19) is fixedly connected to the outer wall of the bottom of the main medicine tank (15), and the outer wall of the main liquid injection pump (19) is fixedly connected with a main electric control valve (6) through a pipeline.

2. The chemical spraying device for solidifying over-standard landfill waste according to claim 1, wherein: The top of the U-shaped groove body (13) is fixedly connected with a feed inlet (4), the top of the feed inlet (4) is fixedly connected with an inclined feed hopper (5), and a discharge outlet (14) is fixedly connected to the inner wall of one end of the U-shaped groove body (13) away from the feed inlet (4).

3. The chemical spraying device for solidifying over-standard landfill waste according to claim 1, characterized in that: One end of the spiral stirring shaft (12) away from the reducer (3) is rotatably connected to the top of the device load-bearing frame (1) through a bearing.

4. The chemical spraying device for solidifying over-standard landfill waste according to claim 1, characterized in that: The outer wall of the top of the device load-bearing frame (1) is fixedly connected with a main chemical addition pipeline (8), a vertical diversion pipeline (11) is fixedly connected to the inner wall of the bottom of the main chemical addition pipeline (8), spray pipelines (9) are symmetrically fixedly connected to the vertical diversion pipeline (11), and a solid conical nozzle (10) is fixedly connected to the outer wall of the bottom of the spray pipeline (9).

5. The medicament spraying device for solidifying over-standard landfill waste according to claim 4, wherein: The outer wall of the main chemical addition pipeline (8) is connected to the outer wall of the device load-bearing frame (1).

6. The medicament spraying device for solidifying over-standard landfill waste according to claim 5, characterized in that: The input end of the main chemical addition pipeline (8) is fixedly connected with a standby electric control valve (7), the inner wall of the standby electric control valve (7) is fixedly connected with a standby liquid injection pump (20) through a pipeline, the input end of the standby liquid injection pump (20) is fixedly connected with a standby medicine tank (16), and a standby stirrer (18) is rotatably connected to the inner wall of the standby medicine tank (16).

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