Thiocarbazide production wastewater treatment technology

Abstract

The invention discloses a thiocarbazide production wastewater treatment technology. The thiocarbazide production wastewater treatment technology comprises the following steps: sucking about 1100kg of40 percent of diluted sulfuric acid in a high-order dropwise adding tank, sucking 4000kg (a batch of materials) of thiocarbazide waste liquid into a reaction kettle, starting tail gas absorption, dropwise adding diluted sulfuric acid, controlling the temperature of the reaction kettle, regulating PH (Potential of Hydrogen) value to an appropriate numerical value, cooling the reaction kettle, carrying out discharging and suction filtration, sucking filtrate into a receiving tank, utilizing 40 percent of industrial waste diluted sulfuric acid to react with the filtrate, removing hydrazine hydrate and a sulfur-containing compound in the filtrate, and generating hydrazine sulfate and sulfur. According to the thiocarbazide production wastewater treatment technology disclosed by the invention, the COD (Chemical Oxygen Demand) content and the ammonia content are greatly reduced, and the removal rate of COD and ammonia is up to 95 percent. A method disclosed by the invention is simple and easyand is energy-saving and environment-friendly, high-COD thiocarbazide wastewater can be degraded, the treatment difficulty and the treatment cost fornext chemical treatment on wastewater can be reduced, byproducts of 99 percent of hydrazine sulfate and sulfur can be sold, and certain economic benefit is generated.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and specifically relates to a process for treating wastewater from the production of thiocarbazide. Background technique [0002] Wastewater refers to the general term of water discharged during residents’ activities and runoff rainwater. It includes domestic sewage, industrial waste water, and other unused water such as the inflow of the first rain path into drainage pipes and canals. It generally refers to that it cannot be recycled or first-level after a certain technical treatment. After pollution, the purification treatment of water that is difficult to reach a certain standard, thiocarbazide, also known as thiocarbazide, thiocarbazide, thiosemicarbazide, 1.3-dithiosemicarbazide, NN-bis-(2.4-two) Methyliminomethyl) methylamine is widely used in organic synthesis. It is an important raw material for the production of high-efficiency broad-spectrum herbicide-Mexifludone. The production of thioca...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of thiocarbazide production waste water treatment process, to solve the existing thiocarbazide (abbreviation thiocarb) production in the above-mentioned background technology is to use 80% hydrazine hydrate and carbon disulfide It is produced by reaction, which produces a large amount of waste water containing 10% hydrazine hydrate and sulfur, which is extremely difficult to treat, with COD as high as 250,000mg / L and ammonia nitrogen as high as 10,000mg / L.