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System and method for processing blue-green algae by using supercritical water oxidation (SCWO)

A supercritical water oxidation and supercritical technology, which is applied in the direction of oxidized water/sewage treatment, heating water/sewage treatment, etc., can solve the problems of complex structure and high cost of wastewater treatment system, and achieve convenient treatment, fast response speed, and efficient treatment system and the effect of simple process

Active Publication Date: 2011-04-13
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the wastewater treatment system is complex and the cost is high

Method used

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  • System and method for processing blue-green algae by using supercritical water oxidation (SCWO)
  • System and method for processing blue-green algae by using supercritical water oxidation (SCWO)
  • System and method for processing blue-green algae by using supercritical water oxidation (SCWO)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 2 As shown, a system utilizing supercritical water oxidation method to treat cyanobacteria comprises a water pump 1, a high-pressure plunger pump 2, a heat exchanger 3, a preheater 4, a supercritical reactor 5 and a high-pressure hydrocyclone 6, each Parts are sequentially connected by delivery pipeline 8 . The supercritical reactor 5 is a pressure-resistant container with a heater 7 inside.

[0043] A heat exchanger 3 is also provided on the delivery pipeline between the high-pressure plunger pump 2 and the preheater 4 . The output port of the high-pressure plunger pump 2 is connected to the inlet of the heat exchanger 3, and the cyanobacteria-contaminated water output by the high-pressure plunger pump 2 is input into the heat exchanger 3 as a cold medium, and the cold medium after heat exchange is input into the preheater 4, and then Then enter the supercritical reactor 5; the outlet of the supercritical reactor 5 is connected to the inlet of the hig...

Embodiment 2

[0052] Such as image 3 As shown, this example is basically the same as Example 1, except that a filter 12 is provided between the water pump 1 and the high-pressure plunger pump 2 . A low-pressure hydrocyclone 11 and an evaporator 10 are arranged between the water pump 1 and the high-pressure plunger pump 2, and the non-decomposed cyanobacteria-contaminated water to be treated extracted by the water pump 1 is separated from a part of the water by the low-pressure hydrocyclone 2, passed through After the evaporator 10 further removes water, the COD concentration of the cyanobacteria polluted water to be treated is increased. Moreover, the speed of the hydrocyclone 2 can also be controlled, so that the delivery speed of the cyanobacteria-contaminated water to be treated can be adjusted as required.

[0053] A method utilizing supercritical water oxidation to process cyanobacteria, comprising the following steps:

[0054] (1) After the cyanobacteria-contaminated water to be tr...

Embodiment 3

[0062] Such as Figure 4 As shown, this example is basically the same as Example 1, except that a filter 12 is provided between the water pump 1 and the high-pressure plunger pump 2 . The undecomposed cyanobacteria-contaminated water to be treated pumped out by the water pump 1 is dehydrated through the filter 12, thereby increasing the concentration of total organic carbon in the cyanobacteria-contaminated water to be treated.

[0063] A method for processing cyanobacteria by supercritical water oxidation, comprising the following steps:

[0064] (1) After the cyanobacteria-contaminated water to be treated is pumped out from the lake with the water pump 1, the water is removed by the filter 12, pressurized by the high-pressure plunger pump 2, preheated by the heat exchanger 3 and the preheater 4, and enters supercritical Reactor 5;

[0065] (2) After filling part of the cyanobacteria-contaminated water to be treated in the supercritical reactor 5, close the outlet valve of ...

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Abstract

The invention relates to a system and method for processing blue-green algae by using supercritical water oxidation (SCWO). The system comprises a water pump, a high-pressure plunger pump, a heat interchanger, a preheater, a supercritical reactor, a high-pressure cyclone hydraulic separator and an oxidant compression pump, wherein the water pump, the high-pressure plunger pump, the heat interchanger, the preheater, the supercritical reactor and the high-pressure cyclone hydraulic separator are connected in sequence by transmission pipelines; the steam outlet of the high-pressure cyclone hydraulic separator is connected with the thermal medium inlet of the heat interchanger; and the oxidant compression pump is connected with the supercritical reactor by pipelines. The system is characterized in that the supercritical reactor is a high pressure resistant container in which a heater is arranged.

Description

technical field [0001] The invention relates to a method for treating blue-green algae, more specifically treating blue-green algae with a supercritical water oxidation method and converting them into non-polluting substances such as water and carbon dioxide. Background technique [0002] Cyanobacteria is a low-level phytoplankton with strong adaptability. It can survive in hot springs at 85°C, in snow and ice in high mountains, and in oceans and fresh waters. Blue-green algae consume dissolved oxygen in water. When blue-green algae proliferate in large numbers, the concentration of dissolved oxygen in water will decrease rapidly, resulting in the death of aquatic organisms such as fish, shrimp, and snails, and polluting water bodies. Spirulina contains a large amount of heavy metal elements and cyanotoxins. After death, it rots and deteriorates very quickly, and it will also produce toxins during the process of being decomposed by bacteria. Cyanotoxins are very harmful to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/02
Inventor 廖传华朱跃钊王重庆李洋武一鸣方向
Owner NANJING TECH UNIV
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