Treatment system for carbide slag and waste sulfuric acid

Abstract

The utility model discloses a treatment system for carbide slag and waste sulfuric acid. The treatment system comprises a carbide slag slurry conveying pipe, a head tank, an enamel kettle, a filter press, a settling pond, an alkali liquor washing tower, a water washing tower and an activated carbon adsorption box, a liquid outlet of the carbide slag slurry conveying pipe and a liquid outlet of the head tank are both communicated with a liquid inlet of the enamel kettle, a liquid outlet of the enamel kettle is communicated with a liquid inlet of the filter press through a gypsum slurry main pipe, and a filtrate outlet of the filter press is communicated with an inlet of the sedimentation tank; a gas outlet of the enamel kettle is communicated with a gas inlet of the alkali liquor washing tower, a gas outlet of the alkali liquor washing tower is communicated with a gas inlet of the water washing tower, and a gas outlet of the water washing tower is communicated with a gas inlet of the activated carbon adsorption box. The device has the advantages that the connection is simple, the implementation is easy, the economic benefit of an enterprise is effectively improved, and the environmental pollution is avoided; the waste gas treatment and the waste water recycling are effectively realized, the environmental pollution is avoided, and meanwhile, the water resource is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of waste residue waste acid treatment systems, in particular to a kind of calcium carbide slag and waste sulfuric acid treatment system. BACKGROUND

[0002] Waste sulfuric acid is the waste liquid generated in many industrial processes, and the concentration of these waste sulfuric acid is different. The current treatment method of waste sulfuric acid is long-term storage, which not only wastes a lot of space and maintenance costs, but also has certain safety hazards. In the process of producing acetylene, calcium carbide (calcium carbide) reacts with water to produce acetylene gas, and at the same time, calcium carbide slag is produced, which is mainly composed of calcium hydroxide and has strong alkalinity. Currently, most of the calcium carbide slag is disposed of by piling up on site, which pollutes the environment. UTILITY MODEL CONTENT

[0003] The utility model aims to provide a calcium carbide slag and waste sulfuric acid treatment system with simple connection structure, which improves the economic benefit of enterprises and avoids environmental pollution.

[0004] The utility model is implemented by the following technical solutions: the patent provides a calcium carbide slag and waste sulfuric acid treatment system, which includes a calcium carbide slag slurry delivery pipe, a high tank, an enamel kettle, a filter press, a sedimentation tank, an alkali washing tower, a water washing tower, and an activated carbon adsorption box. The liquid outlet of the calcium carbide slag slurry delivery pipe and the liquid outlet of the high tank are both in communication with the liquid inlet of the enamel kettle. The liquid outlet of the enamel kettle is in communication with the liquid inlet of the filter press through a gypsum slurry main pipe. The filtrate outlet of the filter press is in communication with the inlet of the sedimentation tank. The gas outlet of the enamel kettle is in communication with the gas inlet of the alkali washing tower. The gas outlet of the alkali washing tower is in communication with the gas inlet of the water washing tower. The gas outlet of the water washing tower is in communication with the gas inlet of the activated carbon adsorption box.

[0005] Further, a jacket is wrapped around the outer wall of the enamel kettle. The circulating water inlet main pipe is in communication with the water inlet of the jacket. The water outlet of the jacket is in communication with the water inlet of the circulating water return main pipe.

[0006] Further, it also includes a calcium carbide slag bin and a stirring pool. The discharge outlet of the calcium carbide slag bin is in communication with the feed inlet of the stirring pool. The liquid outlet of the sedimentation tank is in communication with the liquid inlet of the stirring pool.

[0007] Further, it also includes an acid unloading tank. The liquid outlet of the acid unloading tank is in communication with the liquid inlet of the high tank. The overflow port of the high tank is in communication with the liquid inlet of the acid unloading tank.

[0008] Further, the clear liquid outlet of the sedimentation tank is in communication with one end of the gypsum slurry main pipe that is away from the filter press.

[0009] The advantages of this utility model are: 1. This utility model is simple to connect and easy to implement. By mixing and reacting waste sulfuric acid and carbide slag slurry in an enamel-lined kettle to form a gypsum slurry, and then filtering it through a filter press to obtain gypsum for use as a building material, it effectively improves the economic benefits of enterprises and avoids environmental pollution; 2. The filtrate obtained by the filter press is used to mix with carbide slag after sedimentation to form carbide slag slurry. The waste acid gas generated during the reaction in the enamel-lined kettle is treated by alkali washing and water washing, and finally adsorbed by activated carbon, which effectively achieves the treatment of waste gas and the recycling of wastewater, avoiding environmental pollution and saving water resources. Attached image description:

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] 1. Calcium carbide slag slurry conveying pipe; 2. High-level tank; 3. Enameled kettle; 4. Filter press; 5. Sedimentation tank; 6. Alkali washing tower; 7. Water washing tower; 8. Activated carbon adsorption box; 9. Calcium carbide slag silo; 10. Mixing tank; 11. Acid unloading tank; 12. Gypsum slurry main pipe; 13. Jacket; 14. Circulating water supply main pipe; 15. Circulating water return main pipe. Detailed implementation method:

[0013] Example: Figure 1 As shown, a treatment system for calcium carbide slag and waste sulfuric acid includes a calcium carbide slag slurry conveying pipe 1, an elevated tank 2, an enamel-lined kettle 3, a filter press 4, a sedimentation tank 5, an alkaline washing tower 6, a water washing tower 7, an activated carbon adsorption box 8, a calcium carbide slag silo 9, a mixing tank 10, and an acid unloading tank 11. The outlets of the calcium carbide slag slurry conveying pipe 1 and the elevated tank 2 are both connected to the inlet of the enamel-lined kettle 3. The outlet of the enamel-lined kettle 3 is connected to the inlet of the filter press 4 through a gypsum slurry main pipe 12. The filtrate outlet of the filter press 4 is connected to the inlet of the sedimentation tank 5. The air outlet of the enamel-lined kettle 3 is connected to the air inlet of the alkaline washing tower 6, the air outlet of the alkaline washing tower 6 is connected to the air inlet of the water washing tower 7, and the air outlet of the water washing tower 7 is connected to the air inlet of the activated carbon adsorption box 8.

[0014] A jacket 13 is provided on the outer wall of the enamel-lined kettle 3. The main water supply pipe 14 is connected to the inlet of the jacket 13, and the outlet of the jacket 13 is connected to the inlet of the main water return pipe 15.

[0015] The discharge port of the carbide slag bin 9 is communicated with the feeding port of the stirring pool 10, and the liquid outlet of the settling pool 5 is communicated with the liquid inlet of the stirring pool 10. The clear liquid outlet of the settling pool 5 is communicated with one end of the gypsum slurry main pipe 12 which is away from the filter press 4.

[0016] The liquid outlet of the acid discharging tank 11 is communicated with the liquid inlet of the high tank 2, and the overflow port of the high tank 2 is communicated with the liquid inlet of the acid discharging tank 11.

[0017] Working principle: The waste sulfuric acid stored in the acid discharging tank 11 is pumped into the high tank 2, and the waste sulfuric acid in the high tank 2 and the stirred carbide slag slurry in the stirring pool 10 are all sent to the enamel kettle 3 for stirring reaction. Since the reaction between the carbide slag and the waste sulfuric acid is an exothermic reaction, the circulating water is introduced into the jacket 13 outside the enamel kettle 3 for cooling. When the reaction is completed, the gypsum slurry in the enamel kettle 3 is transported to the filter press 4 through the gypsum slurry main pipe 12 for pressure filtration, so that the gypsum is obtained as building materials and is sent out, effectively improving the economic benefit of the enterprise and avoiding environmental pollution. The filtrate after pressure filtration is temporarily stored in the settling pool 5; the filtrate in the settling pool 5 and the carbide slag in the carbide slag bin 9 are sent to the stirring pool 10 to form the carbide slag slurry. When the gypsum slurry in the enamel kettle 3 is discharged, the supernatant in the settling pool 5 is sent to the gypsum slurry main pipe 12 to clean the gypsum slurry main pipe 12, so as to prevent the gypsum from being blocked in the gypsum slurry main pipe 12 after subsequent precipitation and drying, effectively realizing the recycling of waste water and saving water resources.

[0018] During the reaction in the enamel kettle 3, waste acid gas is discharged. The discharged waste acid gas is sequentially subjected to alkali washing in the alkali washing tower 6, water washing in the water washing tower 7, and active carbon adsorption, dehydration and demisting in the active carbon adsorption box 8, and is finally discharged into the atmosphere by the fan, so that the waste gas treatment is effectively realized and environmental pollution is avoided.

[0019] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for treating carbide slag and spent sulfuric acid, characterized in that, It includes carbide slag slurry delivery pipe, high tank, enamel kettle, filter press, sedimentation tank, lye washing tower, water washing tower and activated carbon adsorption box; the liquid outlet of the carbide slag slurry delivery pipe and the liquid outlet of the high tank are communicated with the liquid inlet of the enamel kettle, the liquid outlet of the enamel kettle is communicated with the liquid inlet of the filter press through the gypsum slurry main pipe, and the filtrate outlet of the filter press is communicated with the inlet of the sedimentation tank; the gas outlet of the enamel kettle is communicated with the gas inlet of the lye washing tower, the gas outlet of the lye washing tower is communicated with the gas inlet of the water washing tower, and the gas outlet of the water washing tower is communicated with the gas inlet of the activated carbon adsorption box.

2. A system for treating carbide slag and spent sulfuric acid according to claim 1, characterized in that, A jacket is coated on the outer wall of the enamel kettle, circulating water inlet main pipe is communicated with the water inlet of the jacket, and the water outlet of the jacket is communicated with the water inlet of circulating water return main pipe.

3. A system for treating carbide slag and spent sulfuric acid according to claim 1, characterized in that, It also includes a carbide slag bin and a stirring pool, the discharge port of the carbide slag bin is communicated with the feeding port of the stirring pool, and the liquid outlet of the sedimentation tank is communicated with the liquid inlet of the stirring pool.

4. A system for treating carbide slag and spent sulfuric acid according to claim 1, characterized in that, It also includes an acid discharge tank, the liquid outlet of the acid discharge tank is communicated with the liquid inlet of the high tank, and the overflow port of the high tank is communicated with the liquid inlet of the acid discharge tank.

5. A system for treating carbide slag and spent sulfuric acid according to claim 1, characterized in that, The clear liquid outlet of the sedimentation tank is communicated with one end of the gypsum slurry main pipe away from the filter press.

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