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Method and device for carbonizing printing and dyeing intermediate production wastewater with superheated steam

A technology for superheated steam and waste water production, applied in steam generation, chemical instruments and methods, and control of superheated temperature, etc., can solve the problems of waste of resources, poor carbonization effect, and low equipment reliability, and achieve the effect of ensuring uniformity

Active Publication Date: 2020-02-28
符蓉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for carbonizing printing and dyeing intermediate production waste water with superheated steam to solve the technical problems of waste of resources, poor carbonization effect and low reliability of equipment in the prior art

Method used

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  • Method and device for carbonizing printing and dyeing intermediate production wastewater with superheated steam

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Embodiment 1

[0034] combine figure 1 As shown, the present embodiment provides a method for superheated steam carbonization of printing and dyeing intermediate production wastewater, which includes the following steps:

[0035] S1. Distill, concentrate (or low-temperature desalinate) the waste water produced by printing and dyeing intermediates, and spray and dry to form dry powder waste; at this time, the water content of dry powder waste is less than 10%, sodium sulfate is about 15-70%, and sodium chloride is about 35%. , about 30% of naphthalene and aniline series organic matter, and COD is 180,000-500,000 mg / kg, turning production wastewater into a high-salt, high-COD waste.

[0036] S2. Send the dry powder waste as a material into the carbonization unit 2 through the feeding unit 1, and use the carbonization screw feeder to push the material so that the material can evenly contact the superheated steam. Preferably, the screw feeder in the feeding unit 1 is preferably a twisted cage f...

Embodiment 2

[0057] This embodiment also provides a device for carbonizing printing and dyeing intermediate production wastewater with superheated steam, which is used to implement the method for superheated steam carbonization of printing and dyeing intermediate production wastewater.

[0058] Such as figure 1 As shown, the device includes a control system and a feeding unit 1, a carbonization unit 2, a discharging unit 3, a first cyclone dust collector 6, a second cyclone dust collector 7, a deodorizing furnace 8, and a superheated steam generating unit that are respectively connected to the control system by communication. 5, the third cyclone dust collector 10, heat conduction oil heating device 11, exhaust fan 12 and tail gas terminal treatment system 13; the feeding unit 1 is connected with the carbonization unit 2 and the discharge unit 3 in sequence; the carbonization unit 2 is provided with superheated steam The inlet port and the exhaust gas outlet port, the superheated steam inl...

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Abstract

The invention relates to the technical field of organic waste treatment equipment, in particular to a method and a device for carbonizing production wastewater of printing and dyeing intermediates through superheated steam. The method comprises steps as follows: production wastewater of the printing and dyeing intermediates such as H-acid, T-acid and para-ester is subjected to distillation and concentration or low-temperature desalination and then is subjected to spray drying, dry powder waste is formed, the waste is put into a superheated steam carbonizing furnace for continuous anaerobic carbonization, and the superheated steam at the temperature of 350-850 DEG C is adopted for carbonization. According to the method, the uniformity of the carbonization is guaranteed, the COD (chemical oxygen demand) content is reduced to 500 mg / kg or lower, and recycling of sodium sulfate and sodium chloride is guaranteed. With the popularization of the technology, the bottleneck of an environmentally sound technology restricting production of H-acid, T-acid and para-ester is solved, so that large-scale production of the printing and dyeing intermediates is promoted rapidly.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing intermediate treatment methods, in particular to a method and device for carbonizing printing and dyeing intermediate production wastewater with superheated steam. Background technique [0002] H acid, T acid, and para ester are dye intermediates in the printing and dyeing industry. At present, in the process of producing these three intermediates, chemical plants will produce a large amount of highly polluted production wastewater. There are many conventional treatment methods for production wastewater: ozone-hydrogen peroxide oxidation pretreatment, emulsion liquid membrane treatment, wet air oxidation treatment, complex extraction and other methods. The prior art provides a treatment method for dye intermediate H-acid production wastewater, which only discloses how to turn H-acid (without mentioning T-acid, para-ester) production wastewater into solid waste, carbonization It simpl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04C10B53/00C10B49/02F22G5/02F23G7/06C01D5/16C01D3/14B01D45/12C02F103/30
CPCB01D45/12C01D3/14C01D5/16C02F1/04C02F2103/30C10B49/02C10B53/00F22G5/02F23G7/06Y02A20/124
Inventor 符国华
Owner 符蓉