Thiocarbazide production wastewater treatment technology

A technology for the production of thiocarbazide and waste water, which is applied in the preparation/purification of hydrazine, sulfur, nitrogen and non-metallic compounds, etc., can solve difficult problems such as treatment, achieve simple and easy methods, reduce treatment difficulty and treatment costs Effect

Inactive Publication Date: 2018-11-23
郭秦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention provides a thiocarbazide production wastewater treatment process, which comprises the following steps:

[0025] S1. Pump about 1100kg of 40% dilute sulfuric acid into the high-level dripping tank;

[0026] S2. Pump 4000KG (a batch of material) sulfur card waste liquid into the reactor, and turn on the tail gas absorption;

[0027] S3. Add dilute sulfuric acid dropwise, control the temperature of the reactor, and adjust the PH value to an appropriate value;

[0028] S4. Cool the reaction kettle again, discharge the material and filter with suction, and pump the filtrate to the receiving tank;

[0029] S5. The filter cake is collected by centrifugal bagging and sent to the sewage station for the next deep treatment;

[0030] S6. Refining of hydrazine sulfate: add 4000L of water into the washing reaction kettle, put the crude hydrazine sulfate into the dissolving kettle, stir and heat up, keep it warm for 2 hours, and then perform hot filtration;

[0031] S7. Dry the fil...

Embodiment 2

[0033] The invention provides a thiocarbazide production wastewater treatment process, which comprises the following steps:

[0034] S1. Pump about 500kg of 20% dilute sulfuric acid into the high-level dripping tank;

[0035] S2. Pump 2000KG (a batch of material) sulfur card waste liquid into the reactor, and turn on the tail gas absorption;

[0036] S3. Add dilute sulfuric acid dropwise, control the temperature of the reactor, and adjust the PH value to an appropriate value;

[0037] S4. Cool the reaction kettle again, discharge the material and filter with suction, and pump the filtrate to the receiving tank;

[0038] S5. The filter cake is collected by centrifugal bagging and sent to the sewage station for the next deep treatment;

[0039] S6. Refining of hydrazine sulfate: add 2000L of water to the washing reaction kettle, put the crude hydrazine sulfate into the dissolving kettle, stir and heat up, keep it warm for 1 hour, and then perform hot filtration;

[0040] S7. Dry the filter ...

Embodiment 3

[0042] The invention provides a thiocarbazide production wastewater treatment process, which comprises the following steps:

[0043] S1. Pump about 800kg of 25% dilute sulfuric acid into the high-level dripping tank;

[0044] S2. Pump 2500KG (a batch of material) sulfur card waste liquid into the reactor, and turn on the tail gas absorption;

[0045] S3. Add dilute sulfuric acid dropwise, control the temperature of the reactor, and adjust the PH value to an appropriate value;

[0046] S4. Cool the reaction kettle again, discharge the material and filter with suction, and pump the filtrate to the receiving tank;

[0047] S5. The filter cake is collected by centrifugal bagging and sent to the sewage station for the next deep treatment;

[0048] S6. Refining of hydrazine sulfate: add 2500L of water into the washing reaction kettle, put the crude hydrazine sulfate into the dissolving kettle, stir and heat up, keep it warm for 1.5 hours, and then perform hot filtration;

[0049] S7. Dry the fi...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C01B21/16C01B17/02
CPCC01B17/02C01B21/16
Inventor 郭秦崔利飞尹占杰田勤俭
Owner 郭秦
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