Method for extracting printing and dyeing waste water heat with low cost

A low-cost technology for printing and dyeing wastewater, applied in heat transfer modification, heat exchange equipment, lighting and heating equipment, etc., can solve problems such as waste of heat energy, achieve the effects of reducing environmental pollution, improving heat exchange efficiency, and eliminating the discharge of three wastes

Active Publication Date: 2015-12-16
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing printing and dyeing wastewater is directly discharged, and the temperature of printing and dyeing wastewater can generally reach 50-80°C, which causes a lot of waste of heat energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A low-cost method for extracting heat from printing and dyeing wastewater, comprising the following steps:

[0049] (1) The inner wall of the heat exchange tube of the heat exchanger is sprayed with superconducting material by cyclone to form a layer of superconducting material;

[0050] (2) Heat the printing and dyeing wastewater through the above-mentioned heat exchanger to extract the heat of the printing and dyeing wastewater.

[0051] In the step (1), the sintering treatment is carried out after spraying the superconducting material. The sintering treatment is divided into two steps. The temperature of the first step is 410°C for 10 hours; the temperature of the second step is 700°C for 10 hours. 20h.

[0052] In the step (1), the thickness of the superconducting material layer is 10 μm.

[0053] In the step (2), the heat of the printing and dyeing wastewater is extracted and used for washing cloth.

[0054] Preferably, the step (2) further includes step (3) fil...

Embodiment 2

[0077] A low-cost method for extracting heat from printing and dyeing wastewater, comprising the following steps:

[0078] (1) The inner wall of the heat exchange tube of the heat exchanger is sprayed with superconducting material by cyclone to form a layer of superconducting material;

[0079] (2) Heat the printing and dyeing wastewater through the above-mentioned heat exchanger to extract the heat of the printing and dyeing wastewater.

[0080] In the step (1), sintering treatment is carried out after spraying the superconducting material. The sintering treatment is divided into two steps. The temperature of the first step is 500°C for 12 hours; the temperature of the second step is 720°C for 12 hours. 25h.

[0081] In the step (1), the thickness of the superconducting material layer is 30 μm.

[0082] In the step (2), the heat of the printing and dyeing wastewater is extracted and used for washing cloth.

[0083] Preferably, the step (2) further includes step (3) filteri...

Embodiment 3

[0106] A low-cost method for extracting heat from printing and dyeing wastewater, comprising the following steps:

[0107] (1) The inner wall of the heat exchange tube of the heat exchanger is sprayed with superconducting material by cyclone to form a layer of superconducting material;

[0108] (2) Heat the printing and dyeing wastewater through the above-mentioned heat exchanger to extract the heat of the printing and dyeing wastewater.

[0109] In the step (1), the sintering treatment is carried out after spraying the superconducting material. The sintering treatment is divided into two steps. The temperature of the first step is 550°C for 15 hours; the temperature of the second step is 750°C for 15 hours. 30h.

[0110] In the step (1), the thickness of the superconducting material layer is 50 μm.

[0111] In the step (2), the heat of the printing and dyeing wastewater is extracted and used for washing cloth.

[0112]Preferably, the step (2) further includes step (3) filt...

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PUM

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Abstract

The invention relates to the technical field of energy recovery and concretely relates to a method for extracting printing and dyeing waste water with low cost. The method comprises the following steps of first spraying superconducting material in a whirlwind way on the inner side wall of a heat exchanging pipe of a heat exchanger to form a superconducting material layer, second exchanging heat of the printing and dyeing waste water via the heat exchanger to extract heat of the printing and dyeing waste water. With the superconducting material sprayed on the inner side wall of the heat exchanging pipe of the heat exchanger in whirlwind way, heat exchanging efficiency for printing and dyeing waste water can be improved; the method is energy-saving and environment friendly, has wide application range and is suitable for wide promotion and application; and obvious social and economic beneficial effects can be achieved.

Description

technical field [0001] The invention relates to the technical field of energy recovery, in particular to a low-cost method for extracting heat from printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, of which 80-90% becomes wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. Impurities, sand substances, inorganic salts, etc. [0003] Most of the existing printing and dyeing wastewater is directly discharged, and the temperature of the printing and dyeing wastewater can g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B23/20F28F13/18C05D9/00C05F7/00
CPCY02A40/20Y02P20/10Y02P70/62
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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