Device and method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater

A strong alkaline and sulfide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of complex treatment process, increased treatment cost, increased energy consumption, etc., and achieve simple process route , reduce the accumulation of sulfide and ammonia nitrogen, and improve the effect of removing ammonia nitrogen and sulfide

Inactive Publication Date: 2015-06-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to conventional treatment methods, sulfide and ammonia nitrogen often need to be treated separately, and at the same time, pH and temperature adjustments are required during the treatment process, resulting in increased treatment costs, complicated treatment processes, and increased energy consumption.

Method used

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  • Device and method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater
  • Device and method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater

Examples

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Embodiment 1

[0036] The strong alkaline ammonia nitrogen-containing and sulfide-containing wastewater 1 obtained after solid-liquid separation (pH value is 12.56, the content of sulfide is 90.5mg / L, the content of ammonia nitrogen is 100.5mg / L, and the temperature is 60°C) is sent to Into the reaction tower 4 (the volume of the reaction tower simulated under the laboratory conditions is 600mL, and the volume of the liquid added is 400mL; the reaction tower is a cylinder made of plexiglass, which has a water inlet, a water outlet, a slag outlet, and a gas outlet, etc.), Add catalyst 3 (catalyst comes from catalyst storage tank 2) from catalyst inlet 21 to reaction tower 4 while injecting water, and catalyzer is manganese sulfate, and the concentration of control manganese sulfate in reaction tower is 200mg / L, leaves standstill 15min. Then use air pump 6 to 0.250m 3 Air is continuously fed into the reaction tower at a rate of / h·L, and the air introduced is dispersed into the wastewater in t...

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Abstract

The invention provides a device and a method for synchronously removing ammonia nitrogen and sulfide of strong alkaline wastewater, and belongs to the technical field of wastewater treatment. The method comprises the steps of pouring strong alkaline wastewater into a reaction tower, and synchronously adding a catalyst which is manganese chloride or manganese sulfate; standing, then charging air, performing oxidation reaction through oxygen in the air to remove sulfide from the wastewater, introducing ammonia molecules from a liquid phase into a gas phase through bubble formed by the air, and then transferring into a subsequent waste gas absorbing device through a gas outlet of the reaction tower; standing to naturally precipitate; draining supernate through a water outlet of the reaction tower; discharging the rest solid-liquid mixture from the reaction tower through a slag discharging opening of the reaction tower so as to achieve the treatment of synchronously removing ammonia nitrogen and sulfide of the strong alkaline wastewater. The method is applicable to treatment of ammonia nitrogen and sulfide containing strong alkaline wastewater, in particular carbide-slag slurry supernate produced by preparing acetylene by the calcium carbide method; the process line is simple; the operation cost and energy consumption can be effectively saved.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a device and a method for simultaneously removing ammonia nitrogen and sulfide from strongly alkaline waste water produced in a process for producing acetylene by a calcium carbide method. Background technique [0002] In the process of producing acetylene by the calcium carbide method, when the raw material calcium carbide reacts with water, a large amount of calcium carbide slurry is released while the acetylene gas is released. The calcium carbide slurry from the acetylene generator flows into the sedimentation tank through overflow, and is deposited in the sedimentation tank. After mechanical dehydration and clarification in the pool to achieve solid-liquid separation, calcium carbide slag is discharged from the sludge discharge hopper, while the supernatant liquid (supernatant liquid) is relatively alkaline in the chlor-alkali system due to its high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/74C02F9/04
CPCC02F1/20C02F1/725C02F1/74C02F2101/101C02F2101/16
Inventor 花修艺朱磊董德明梁大鹏郭志勇
Owner JILIN UNIV
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