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Method and device for extracting phosphorus from sludge

An extraction method and technology for phosphorus elements, which are applied in the fields of sludge treatment, oxidation treatment of sludge, chemical instruments and methods, etc., can solve problems such as inability to effectively collect phosphorus elements, and achieve the effect of easy utilization and resource saving.

Active Publication Date: 2020-04-10
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the problem that phosphorus cannot be effectively collected in the prior art so as to provide a method and device for extracting phosphorus from sludge that can effectively collect phosphorus and save resources

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  • Method and device for extracting phosphorus from sludge
  • Method and device for extracting phosphorus from sludge

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Embodiment 1

[0021] Such as figure 1 As shown, this embodiment provides a method for extracting phosphorus in sludge, using the device for extracting phosphorus in sludge described in Example 1 to extract phosphorus, which specifically includes the following steps: Step S1: extracting phosphorus from sludge to be treated The mud is configured into a slurry; step S2: perform a supercritical reaction on the slurry to form a thermal fluid; step S3: separate the thermal fluid after cooling and reducing the pressure to obtain solid particles; step S4: add medicaments to the solid particles , mixed and sieved to obtain phosphorus-containing particles.

[0022] In the method for extracting phosphorus in the sludge described in this embodiment, in the step S1, the sludge to be treated is configured into a slurry, thereby facilitating the configuration of the slurry; in the step S2, the slurry is subjected to a supercritical reaction to form hot fluid, which is conducive to the further formation o...

Embodiment 2

[0029] Such as figure 2 As shown, this embodiment provides a device for extracting phosphorus in sludge, including a pulping pool 11, and a reactor 13 connected to the pulping pool 11 through a first channel of a heat exchanger 12, wherein the The reactor 13 is connected to the depressurization system 14 through the second channel of the heat exchanger 12 , the depressurization system 14 is connected to the dispensing tank 16 through the separation system 15 , and the dispensing tank 16 is connected to the collecting tank 17 .

[0030] The device for extracting phosphorus from sludge in this embodiment includes a pulping tank 11 , a heat exchanger 12 , a reactor 13 , a decompression system 14 , a separation system 15 , a dispensing tank 16 and a collecting tank 17 . Wherein the pulping tank 11 is connected to the reactor 13 through the first channel of the heat exchanger 12, and the sludge to be treated in the pulping tank 11 enters the reactor 13 after heat exchange and temp...

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Abstract

The invention relates to a method and a device for extracting a phosphorus element in sludge. The method comprises the following steps: preparing slurry from to-be-treated sludge; carrying out supercritical reaction on the slurry so as to obtain a thermal fluid; cooling and decompressing the thermal fluid, and then separating the thermal fluid, so as to obtain solid particles; and adding a medicament into the solid particles, mixing, and sieving so as to obtain phosphorus-containing particles. According to the method, the thermal fluid obtained by supercritical reaction is cooled, decompressed and separated to obtain the solid particles, and the solid particles are combined with the corresponding medicament, so that the collection of the phosphorus element is effectively realized, the phosphorus element in the sludge can be recycled and collected, the resources are saved, and the subsequent utilization of the phosphorus element is facilitated.

Description

technical field [0001] The invention relates to the technical field of sludge control and resource regeneration, in particular to a method and device for extracting phosphorus from sludge. Background technique [0002] At present, the depletion of phosphate rock resources has become a worldwide problem. Although China's phosphate rock reserves are second only to Morocco, accounting for the second place in the world. However, compared with developed countries in the world, my country has a large gap in ore quality, selectivity and phosphate rock mining, and the basic reserves of phosphate rock available for processing and utilization are relatively low, only 4.054 billion tons . Among them, medium and low-grade ores are mostly, and P 2 o 5 The rich ore with a mass fraction greater than 30% is only 1.108 billion tons. According to the current mining speed of phosphate rock, the rich ore can only maintain the demand for about 7-10 years, and then it will be forced to use lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/08C02F101/30
CPCC02F11/00C02F11/086C02F2101/105C02F2101/30C02F2209/02C02F2209/03
Inventor 刘扬程乐明刘晨
Owner ENN ENVIROTECH CO LTD