Phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process

A three-in-one, acid recovery technology, applied in inorganic chemistry, carbon compounds, chemical instruments and methods, etc., can solve the problems of inability to achieve acid recovery, washing and dehydration, low dehydration efficiency, and inability to continuously fabricate

Pending Publication Date: 2021-07-06
福建省芝星炭业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing phosphoric acid-based activated carbon production process, the recovery of phosphoric acid in the pores of the activated material is generally carried out using a recovery barrel or a plate-and-frame filter press. These two recovery methods often have a residual phosphorus content of more than 3% in the recovered activated carbon pores, and The dehydration efficiency is not high, and it cannot be processed continuously. As a result, it is common in the prior art to achieve good acid recovery, washing and dehydration effects even after the cooperation of multiple equipments.

Method used

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  • Phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process
  • Phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process
  • Phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Please refer to Figure 1 to Figure 3 As shown, the three-in-one automatic process of phosphoric acid activated carbon recovery, rinsing and dehydration includes the following steps:

[0082] Step 1. Put the carbon slurry into the centrifuge for dehydration treatment, and collect the phosphoric acid into the first storage tank;

[0083] Step 2, add 320L in the centrifuge for the first time influent (phosphoric acid of 28 ° of Bé), carry out dehydration treatment 5min, collect the first time effluent in the first storage tank; the phosphoric acid water in the first storage tank is used for Prepare the next batch of carbon slurry;

[0084] Step 3, add 320L second time water inflow (phosphoric acid of 18 ° of Bé) in the centrifuge, carry out dehydration treatment 12min, collect the second time effluent in the second storage tank, described second time effluent is used as the next rinsing The first water use;

[0085] Step 4, add 320L in the centrifuge for the third time...

Embodiment 2

[0099] The difference between embodiment 2 and embodiment 1 is only that the phosphoric acid concentration of the first water inflow to the sixth inflow is different, and the first water inflow to the sixth inflow in embodiment 2 are respectively from the second water out to the seventh water out;

[0100] The first water inlet to the sixth water inlet of Example 2 are respectively: phosphoric acid of 32°Bé, phosphoric acid of 20°Bé, phosphoric acid of 14°Bé, phosphoric acid of 9°Bé, phosphoric acid of 4°Bé, phosphoric acid of 0.5°Bé .

Embodiment 3

[0102] The only difference between embodiment 3 and embodiment 1 is that the phosphoric acid concentration of the first water inflow to the sixth inflow is different, and the first water inflow to the sixth inflow in embodiment 3 are respectively From the second effluent to the seventh effluent, the high-concentration phosphoric acid water in the first storage tank is used to prepare the next batch of carbon slurry. It can also be used to adjust the concentration of the second effluent to the sixth effluent within the required range;

[0103] The first water inlet to the seventh water inlet of embodiment 3 are respectively: the phosphoric acid of 35°Bé, the phosphoric acid of 25°Bé, the phosphoric acid of 18°Bé, the phosphoric acid of 12°Bé, the phosphoric acid of 5°Bé, the phosphoric acid of 1°Bé Phosphoric acid of Bé.

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Abstract

The invention discloses a phosphoric acid method activated carbon acid recovery, rinsing and dehydration three-in-one automatic process, and belongs to the technical field of phosphoric acid method activated carbon. According to the process, carbon slurry is dehydrated, phosphoric acid is collected, then inlet water is added in sequence to carry out dehydration treatment on activated carbon, and outlet water of each time is collected to be used for treating the next batch of carbon slurry; the first inlet water is phosphoric acid of 25-35 Baume degrees, the second inlet water is phosphoric acid of 18-25 Baume degrees, the third inlet water is phosphoric acid of 12-18 Baume degrees, the fourth inlet water is phosphoric acid of 5-12 Baume degrees, the fifth inlet water is phosphoric acid of 2-5 Baume degrees, the sixth inlet water is phosphoric acid of 0-1 Baume degrees, and the seventh inlet water is clean water without chlorine. According to the process, by controlling the concentration of phosphoric acid in inlet water added each time and cooperating with a dehydration process, activated activated carbon is effectively rinsed and dehydrated, meanwhile, phosphoric acid is effectively recovered, the obtained finished product is thoroughly rinsed, the ash content is low, the quality is excellent, and a green and sustainable production mode is formed.

Description

technical field [0001] The invention belongs to the technical field of phosphoric acid activated carbon, and in particular relates to a three-in-one automatic process of phosphoric acid activated carbon recovery, rinsing and dehydration. Background technique [0002] Activated carbon by phosphoric acid method refers to activated carbon prepared by phosphoric acid method. During the preparation process, the activated carbon raw material is soaked in a certain concentration of phosphoric acid solution, and then activated at high temperature. After activation, the phosphoric acid in the activated carbon is washed away, and phosphoric acid is obtained after drying. activated carbon. The rinsing step in the preparation of phosphoric acid-based activated carbon is extremely critical. Rinsing can fully wash the phosphoric acid in the activated carbon and avoid phosphoric acid residues, resulting in a small amount of acidic impurities remaining in the pores of the activated carbon a...

Claims

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Application Information

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IPC IPC(8): C01B32/39C01B32/378
CPCC01B32/39C01B32/378
Inventor 魏安国林锐军林兴娇王欣
Owner 福建省芝星炭业股份有限公司
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