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Garbage-percolate evaporating and concentrating processing method capable of recycling ammonia and device thereof

A technology for landfill leachate and evaporation concentration, which is applied in the field of evaporation and concentration treatment methods and equipment for landfill leachate or high-concentration wastewater. The effect of cost reduction and low equipment cost

Active Publication Date: 2013-11-13
陈伟雄 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method that can directly meet the standard of wastewater evaporation and distilled water, it is generally solved by adding a process to treat the distilled water formed by the secondary steam condensation, such as biochemical, or ion exchange, or strong oxidation, stripping, etc. Processes, such as "A Treatment Process for Landfill Leachate" disclosed in Chinese Invention Patent 200710031584.9, are to solve the problem of high ammonia nitrogen content in distilled water by adding ion exchange and other subsequent treatment processes after evaporation of wastewater, which makes the existing treatment process Increasingly complex, lengthy and costly processes

Method used

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  • Garbage-percolate evaporating and concentrating processing method capable of recycling ammonia and device thereof
  • Garbage-percolate evaporating and concentrating processing method capable of recycling ammonia and device thereof
  • Garbage-percolate evaporating and concentrating processing method capable of recycling ammonia and device thereof

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specific Embodiment 1

[0053] image 3 The shown landfill leachate evaporation and concentration equipment capable of ammonia recovery is one of the embodiments of the present invention, which includes units such as an evaporator, a steam compressor, an ammonia recovery mechanism, and an oxidation / absorption mechanism; the equipment of this embodiment Among them, the evaporator adopts the MVC horizontal evaporator, and the existing general vertical evaporator can also be used. The horizontal evaporator includes an evaporation chamber and a heating pipe, and an ammonia recovery mechanism is arranged on the pipeline between the steam outlet of the evaporation chamber and the heating pipe; the steam outlet communicates with the steam inlet of the ammonia recovery mechanism through the first pipeline, so that the The secondary steam evaporated from the evaporation chamber is sent to the ammonia recovery mechanism; the steam outlet of the ammonia recovery mechanism is connected with the steam inlet of th...

specific Embodiment 2

[0069] The difference between the landfill leachate treatment equipment of this embodiment and the specific embodiment 1 is that the oxidation / absorption mechanism and the second steam compressor are omitted, and its structural diagram is as follows Figure 4 shown. Its specific processing flow is:

[0070] (1) Firstly, the pretreated leachate is sent into the evaporator, and the ammonia and volatile substances produced by evaporation are discharged out of the evaporator along with the secondary steam;

[0071] (2) The secondary steam enters the steam compressor to pressurize and then enters the ammonia recovery mechanism.

[0072] (3) After the ammonia in the secondary steam is neutralized with the acid absorption liquid in the ammonia recovery mechanism, ammonium salts are precipitated, and the pH of the acid absorption liquid is kept at less than 4.5, while the temperature of the acid absorption liquid is controlled to be higher than that of the secondary steam 0- 5°C, so...

specific Embodiment 3

[0074] The difference between the landfill leachate treatment equipment of this embodiment and the specific embodiment 1 is that the first steam compressor and the oxidation / absorption mechanism are omitted, and its structural diagram is as follows Figure 5 shown. The specific processing flow is:

[0075] (1) Firstly, the pretreated leachate is sent into the evaporator, and the ammonia and volatile substances produced by evaporation are discharged out of the evaporator along with the secondary steam;

[0076] (2) The ammonia in the secondary steam is neutralized with the acid absorption liquid in the ammonia recovery mechanism, and ammonium salts are precipitated. The pH of the acid absorption liquid is kept at less than 4.5, and the temperature of the acid absorption liquid is controlled to be 0-5 higher than that of the secondary steam. ℃, so as to ensure that the steam does not participate in the reaction and remains unchanged. The neutralization reaction method requires ...

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Abstract

The invention discloses a garbage-percolate evaporating and concentrating processing method capable of recycling ammonia, which comprises the following steps that: (1) garbage percolate is sent into a heating chamber of an evaporator to be evaporated and concentrated to form secondary steam and dischargeable concentrated liquid; (2) ammonia recycling treatment is undertaken for the secondary steam produced in the step (1); and (3) the secondary steam after the ammonia recycling treatment is sent into a heating tube in the evaporator in the step (1) through a pipeline to be used as a heat source for evaporating the garbage percolate. The invention also discloses a garbage-percolate evaporating and concentrating processing device for realizing the above method. Due to the method, the garbage percolate or high-ammonia high-organism high-salt waste water is evaporated, so the ammonia and volatile organisms in the waste water can be evaporated to form secondary steam with the vapor, the ammonia is recycled and the organisms are removed during the flowing process of the secondary steam, and further the method also has the characteristics of thorough absorption and easiness in implementation under the situation that the processed distilled water conforms to relevant emission standards.

Description

technical field [0001] The invention relates to an evaporation concentration treatment process and equipment for landfill leachate, in particular to an evaporation concentration treatment method and equipment for landfill leachate or high-concentration waste water capable of recovering ammonia. Background technique [0002] With the increase of my country's urban population, the expansion of city scale and the improvement of residents' living standards, the output of my country's urban domestic waste has also increased sharply. At present, the main treatment methods of urban waste include landfill, incineration, composting and so on. The national "Twelfth Five-Year Plan" requires that domestic waste in all towns and above in my country must be treated in a harmless manner. There will be a large amount of leachate generated during the treatment of domestic waste that needs to be treated. Due to the habit of eating and living in our country, the composition of domestic waste I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04C02F9/04C02F9/02C02F9/08C01C1/242C01C1/18C01B25/28
Inventor 陈伟雄沈玉东
Owner 陈伟雄
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