Unlock instant, AI-driven research and patent intelligence for your innovation.

Treatment system and treatment method for DOP production wastewater

A technology for the production of waste water and treatment methods, which is applied in the direction of water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problem of ineffective treatment of aromatic compounds in waste water, reduce the steps of loading and unloading, and improve efficiency effect

Inactive Publication Date: 2020-09-18
NANJING UNIV OF TECH +2
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only treat biodegradable pollutants
CN101462810A discloses a plasticizer wastewater treatment process. The wastewater is treated in the order of hydrolysis deesterification, neutralization, anaerobic treatment, aerobic treatment, and precipitation. It is a plasticizer wastewater treatment without dilution and low operating cost. process, the COD of the effluent is small, but it cannot effectively treat the aromatic compounds in the wastewater

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment system and treatment method for DOP production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The COD in the DOP production wastewater to be treated is 10562mgO 2 / L. Wherein, the content of phthalates (such as disodium phthalate, potassium phthalate, etc.) is 0.02wt%, the content of phthalic acid is 0.4wt%, alcohols (such as methanol, propanol etc.) content is 0.1wt%.

[0027] A treatment system for DOP production wastewater, including a multi-adsorption system, an in-situ microwave regeneration system and a regeneration waste gas oxygen cracking system; the multi-stage adsorption system consists of three adsorption towers with the same specifications (the first adsorption tower, The 2nd-stage adsorption tower and the 3rd-stage adsorption tower) are connected in series in sequence, and 50kg of 20-mesh coconut shell activated carbon is installed in each stage of the adsorption tower; a liquid inlet is provided at the bottom of the adsorption tower, and waste water is introduced from the top of the adsorption tower. There is a liquid outlet at the bottom of the...

Embodiment 2

[0031] The COD in the DOP production wastewater to be treated is 1041mgO 2 / L. Among them, the content of phthalates (such as disodium phthalate, potassium phthalate, etc.) is 0.004wt%, the content of phthalic acid is 0.003wt%, alcohols (such as methanol, propanol etc.) content is 0.0015wt%.

[0032] DOP production waste water passes through multistage adsorption system (with embodiment 1) with the flow of 1000L / h, and the COD of DOP waste water is reduced to 21.1mg after 3 stages of adsorption. 2 / L, reaching the national emission standard. When the volume of the discharge liquid from the first-stage adsorption tower reaches 9.3 times the column volume, the COD of the discharge liquid is almost equal to the COD of the inlet liquid. It is judged that the adsorption of the first-stage adsorption tower is saturated, the multi-stage adsorption system is suspended, and the first-stage adsorption tower is disconnected from the The connection of the multi-stage adsorption system,...

Embodiment 3

[0035] The COD in the DOP production wastewater to be treated is 1061mgO 2 / L. Among them, the content of phthalates (such as disodium phthalate, potassium phthalate, etc.) is 0.005wt%, the content of phthalic acid is 0.001wt%, alcohols (such as methanol, propanol etc.) content is 0.001wt%.

[0036] DOP production waste water passes through the multi-stage adsorption system of in-situ microwave regeneration in embodiment 2 with the flow rate of 1000L / h, and the COD of DOP waste water is reduced to 22.1mg after 3 stages of adsorption. 2 / L, reaching the national emission standard. When the effluent volume of the first-stage adsorption tower reached 8.9 times the column volume, the COD of the effluent liquid was almost equal to the COD of the inlet liquid, and it was judged that the adsorption of the first-stage adsorption tower was saturated. It can be seen that the adsorption effect of the regenerated activated carbon is almost the same as that of the unused activated carbo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a treatment system for DOP production wastewater. The treatment system comprises a multi-adsorption system, an in-situ microwave regeneration system and an oxygen cracking system; the multi-adsorption system is formed by sequentially connecting 3-8 stages of adsorption towers in series; a liquid inlet pipeline of each stage of adsorption tower is provided with a valve and awater pump; when any stage of adsorption tower is saturated in adsorption, the saturated adsorption tower is vertically arranged in a microwave device to form an in-situ microwave regeneration system, nitrogen is introduced from a liquid outlet in the bottom of the adsorption tower, and a liquid inlet in the top of the adsorption tower is connected with the oxygen pyrolysis system. The inventionalso discloses a treatment method for DOP production wastewater. The method comprises the following steps: introducing DOP production wastewater into the multi-adsorption system, adsorbing the DOP production wastewater by an adsorbent, discharging the DOP production wastewater after the DOP production wastewater reaches the emission standards; carrying out in-situ microwave regeneration on the adsorbent after adsorption saturation under a nitrogen condition; introducing nitrogen containing organic impurities and fresh air into the oxygen cracking system, and carrying out a purification treatment under the action of an oxygen cracking catalyst. The treatment method has the characteristics of high efficiency and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and relates to a treatment system and a treatment method for DOP production waste water. Background technique [0002] Phthalate esters (phthalate esters, PAEs, commonly known as phthalate esters) are a class of toxic organic compounds that widely exist in the environment. They are mainly used as plastic plasticizers. Such substances are generally colorless oily viscous liquids , poorly soluble in water, easily soluble in organic solvents, can enter human and animal bodies through inhalation, diet and skin contact, easily accumulate in living organisms, and have teratogenic and mutagenic effects. After entering the environment, phthalates can cause acute poisoning to organisms in the environment, especially aquatic organisms. Dioctyl phthalate (dioctyl phthalate, DOP) is an important phthalate compound and an important general-purpose plasticizer. It is mainly used in the processing of polyv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02B01D53/86B01D53/44C02F101/34
CPCC02F1/001C02F1/283C02F1/285B01D53/8687C02F2303/16B01D2257/708C02F2101/34
Inventor 乔旭刘清李进朋陈献崔咪芬齐敏周哲徐希化
Owner NANJING UNIV OF TECH