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Treatment method for methoxyl acrylate pesticide product wastewater

A methoxyacrylic acid treatment method technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of high CODcr concentration in wastewater, no economic benefits, increased disposal costs, etc., to achieve treatment Good effect, save energy and water resources, solve high cost effect

Active Publication Date: 2017-06-13
利民化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Due to the high concentration of CODcr in wastewater, the mixed salt obtained by direct evaporation without pretreatment can only be disposed of as hazardous waste, which greatly increases the cost of disposal and wastes useful resources
[0006] 2) The steamed water still contains a high amount of organic matter, and it needs to be further treated before it can be discharged up to the standard. The treatment cost is high and does not produce economic benefits

Method used

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  • Treatment method for methoxyl acrylate pesticide product wastewater
  • Treatment method for methoxyl acrylate pesticide product wastewater
  • Treatment method for methoxyl acrylate pesticide product wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The first step is waste water collection and filtration and recycling products: the workshop produces 38 tons of waste water every day. The waste water enters the waste water collection tank with a cone-shaped bottom. The waste water pump outlet is equipped with a double filter for filtering and recycling products. 0.5 tons of products can be recycled every day. The double filter is equipped with pressure interlocking control. When the pressure of one filter is high, it will alarm and switch to the other to avoid clogging and affect the continuity of the treatment process. 37.5 tons of filtrate are produced per day and enter the second step of treatment.

[0041] The second step is to adjust the pH: the wastewater is 3.0m 3 / h is pumped into the pH adjustment tank, and 98% sulfuric acid is added at the same time. The ratio of acid to waste water is controlled according to the mass flow meter. The sulfuric acid is added at 114kg / h, and the pH is automatically adjusted to 2.5,...

Embodiment 2

[0048] The first step is the same as in Example 1.

[0049] The second step is to adjust the pH: the wastewater is 3.2m 3 / h is pumped into the pH adjustment tank, and 80% waste sulfuric acid is added at the same time. The ratio of acid to waste water is controlled according to the mass flowmeter. The sulfuric acid is added at 150kg / h, and the pH is automatically adjusted to 2.8, so that potassium carbonate (46kg / h) It reacts with potassium bicarbonate salt (150kg / h) to produce potassium sulfate (190kg / h), and the tail gas is introduced into the alkaline washing spray tower through the induced air system for treatment.

[0050] The third step, UV-photocatalytic oxidation: pH = 2.8 wastewater with 3.3m 3 / h is pumped into the UV-photocatalytic oxidation process system to pre-treat the wastewater. The automatic dosing system is used to input 30% hydrogen peroxide and 35% ferric chloride solution, the dosage is 1450ppm, 200ppm, and passes through the hydroxyl radical The oxidation ef...

Embodiment 3

[0056] The first step is the same as in Example 1.

[0057] The second step is to adjust the pH: the wastewater is 3.2m 3 / h is pumped into the pH adjustment tank, and 98% sulfuric acid is added at the same time. The ratio of acid to waste water is controlled according to the mass flow meter. The sulfuric acid is added at 125kg / h, and the pH is automatically adjusted to 3.0, so that potassium carbonate (48kg / h ) And potassium bicarbonate salt (152kg / h) react to produce potassium sulfate (193kg / h), and the tail gas is introduced into the alkaline washing spray tower through the induced air system for treatment.

[0058] The third step, UV-photocatalytic oxidation: pH=3.0 wastewater with 3.3m 3 / h is pumped into the UV-photocatalytic oxidation process system to pre-treat the wastewater. The automatic dosing system is used to input 30% hydrogen peroxide and 50% ferric chloride solution, and the dosage is 1400ppm and 150ppm, respectively, through the hydroxyl radical The oxidation effe...

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Abstract

The invention relates to a treatment method for methoxyl acrylate pesticide product wastewater. The method comprises the following steps of: collecting and filtering the wastewater; adding sulfuric acid, adjusting the pH value, and converting inorganic potassium salt into potassium sulfate; performing UV-photo-catalytic oxidation to convert organic potassium salt into potassium sulfate; adding potassium hydroxide, adjusting the pH value, neutralizing excessive sulfuric acid, and then adding ferric trichloride for a precipitation reaction; filtering the precipitate to remove a flocculant; and performing multiple-effect evaporation and crystal crystallization, and separating to obtain a potassium sulfate solid, wherein steam condensed water and evaporated water are reused for a workshop. Resource utilization of the wastewater is realized, the wastewater is not discharged, and thus the method has relatively high economical and environmental benefits.

Description

Technical field [0001] The present invention relates to the technical field of wastewater treatment, and in particular to a method for treating wastewater from methoxyacrylate pesticide products. Background technique [0002] Production of methoxy acrylate pesticide products such as pyraclostrobin, azoxystrobin, kresoxim-methyl, trifloxystrobin, etc. The main components of the wastewater produced are: technical medicine, potassium methyl sulfate, potassium carbonate, and hydrogen carbonate Potassium mixed salt, CODcr=30000-40000mg / l. [0003] For high-salinity wastewater, the current treatment processes commonly used by manufacturers are: the first step: press filter to recover the product; the second step, evaporation and desalination: the distilled water CODcr=5000-10000mg / l, it needs to be further treated and discharged after reaching the standard. Salt is entrusted for disposal as hazardous waste. [0004] The traditional processing technology has the following problems: [0005...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/00C01D5/02C02F101/10C02F103/36
CPCC01D5/00C01D5/02C02F1/001C02F1/048C02F1/32C02F1/5236C02F1/66C02F1/725C02F9/00C02F2101/10C02F2101/40C02F2103/343C02F2103/36C02F2301/08
Inventor 尚鸿艳孙敬权李新生张荣全庄文栋孙丽梅冯小冬
Owner 利民化学有限责任公司
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