阅读说明：本技术 一种活性炭制备用洗涤干燥工艺 (Washing and drying process for preparing activated carbon ) 是由 程振国 于 2021-05-08 设计创作，主要内容包括：本发明涉及活性炭制备工艺相关技术领域,且公开了一种活性炭制备用洗涤干燥工艺,所述工艺包括以下制备步骤,S1、将炭化活化处理得到的活性炭,置入高压浸渍设备并导入浸渍液,浸渍液和活性炭的质量比例为1：1；S2、将高压浸渍设备升温至75—100℃区间,升温速度为5-8℃/min,在此同时,高压浸渍设备对浸有活性炭的浸渍液进行转速为5-10r/min的搅拌,高压浸渍设备内的封闭空间加压至1.5-2个标准大气压。该活性炭制备用洗涤干燥工艺,增加活性炭与浸渍液之间的反应效率,采用蒸馏水对浸渍过后的活性炭进行浸泡洗涤,然后通过大量的蒸馏水高压冲洗,使得蒸馏水中和酸性的活性炭,最大限度的降低活性炭微孔中的化学残留物,提高活性炭的使用性能。(The invention relates to the technical field related to activated carbon preparation processes, and discloses a washing and drying process for activated carbon preparation, which comprises the following preparation steps of S1, putting activated carbon obtained by carbonization and activation treatment into high-pressure impregnation equipment, and introducing impregnation liquid, wherein the mass ratio of the impregnation liquid to the activated carbon is 1: 1; s2, heating the high-pressure impregnation equipment to a temperature of 75-100 ℃, wherein the heating speed is 5-8 ℃/min, stirring the impregnation liquid impregnated with the activated carbon by the high-pressure impregnation equipment at a rotating speed of 5-10r/min, and pressurizing the closed space in the high-pressure impregnation equipment to 1.5-2 standard atmospheric pressures. This activated carbon preparation is with washing drying process increases the reaction efficiency between activated carbon and the maceration extract, adopts the distilled water to soak the washing to the activated carbon after the flooding, then washes through a large amount of distilled water high pressure for the chemical residue in the active carbon micropore is reduced to furthest to the acidic activated carbon of distilled water neutralization, improves the performance of activated carbon.)

1. The washing and drying process for preparing the activated carbon is characterized by comprising the following preparation steps of:

s1, putting the activated carbon obtained through carbonization and activation treatment into high-pressure impregnation equipment, and introducing impregnation liquid, wherein the mass ratio of the impregnation liquid to the activated carbon is 1: 1;

s2, heating the high-pressure impregnation equipment to a temperature of 75-100 ℃, wherein the heating speed is 5-8 ℃/min, stirring the impregnation liquid impregnated with the activated carbon by the high-pressure impregnation equipment at a rotating speed of 5-10r/min, and pressurizing a closed space in the high-pressure impregnation equipment to 1.5-2 standard atmospheric pressures;

s3, uniformly placing the impregnated activated carbon into a filtering and drying device for full drying, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

s4, putting the fully dried activated carbon into a filtering stirrer for washing, introducing distilled water into the filtering stirrer, and circularly rotating a filter screen bearing the activated carbon in the filtering stirrer in forward and reverse directions at a rotating speed of 20r/min, wherein the temperature range in the filtering stirrer is 45-60 ℃, and the washing time range of the distilled water is 80-120 min;

s5, putting the preliminarily washed activated carbon in the S4 into a washing and spraying device, and carrying out sufficient high-pressure washing and spraying through distilled water until the pH value of the derived sprayed distilled water is between 6 and 7;

s6, guiding the activated carbon after spray washing into a filtering and drying device for full drying again, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

and S7, detecting the moisture of the dried activated carbon by using a particle drying detection instrument, continuously drying unqualified activated carbon, and warehousing and storing qualified activated carbon.

2. The washing and drying process for preparing activated carbon according to claim 1, wherein the washing and drying process comprises the following steps: the dipping solution consists of a potassium sulfate solution and an ammonium persulfate solution, wherein the volume ratio of the potassium sulfate solution to the ammonium persulfate solution is 1:1, the concentration of the potassium sulfate solution is 3-5mol/L, and the concentration of the ammonium persulfate solution is 0.5-1 mol/L.

3. The washing and drying process for preparing activated carbon according to claim 1, wherein the washing and drying process comprises the following steps: the moisture content of the dried active carbon is less than or equal to 3 percent, and the dried active carbon is a qualified product.

4. The washing and drying process for preparing activated carbon according to claim 1, wherein the washing and drying process comprises the following steps: and in the step S4, the heating speed of the filtering stirrer for heating and washing the active carbon is 2-5 ℃/min.

5. The washing and drying process for preparing activated carbon according to claim 1, wherein the washing and drying process comprises the following steps: the pH value of the distilled water introduced in the step S4 is 6-7, and the mass ratio of the distilled water to the fully dried activated carbon is 3: 1.

6. The washing and drying process for preparing activated carbon according to claim 1, wherein the washing and drying process comprises the following steps: the organic material of the active carbon is wood or straw, and the crushing granularity of the active carbon is 2000-5000 meshes.

Technical Field

The invention relates to the technical field related to activated carbon preparation processes, in particular to a washing and drying process for activated carbon preparation.

Background

The active carbon is a black porous solid carbon, and is produced by crushing and molding organic matters or carbonizing and activating the organic matters by using uniform coal particles. The main component is carbon and contains a small amount of elements such as oxygen, hydrogen, sulfur, nitrogen, chlorine and the like. The specific surface area of the common activated carbon is 500-1700 m²Between/g. Has strong adsorption performance and is an industrial adsorbent with wide application.

The preparation of the activated carbon needs more process procedures, after the preparation of the activated carbon is finished, the activated carbon needs to be washed and dried, and the micropore residues of the activated carbon are thoroughly washed and dried.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a washing and drying process for preparing activated carbon, which solves the problem that a certain amount of processing residues are remained in the washing and drying process in the preparation of activated carbon to influence the service performance of the activated carbon.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a washing and drying process for preparing activated carbon comprises the following preparation steps:

s1, putting the activated carbon obtained through carbonization and activation treatment into high-pressure impregnation equipment, and introducing impregnation liquid, wherein the mass ratio of the impregnation liquid to the activated carbon is 1: 1;

s2, heating the high-pressure impregnation equipment to a temperature of 75-100 ℃, wherein the heating speed is 5-8 ℃/min, stirring the impregnation liquid impregnated with the activated carbon by the high-pressure impregnation equipment at a rotating speed of 5-10r/min, and pressurizing a closed space in the high-pressure impregnation equipment to 1.5-2 standard atmospheric pressures;

s3, uniformly placing the impregnated activated carbon into a filtering and drying device for full drying, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

s4, putting the fully dried activated carbon into a filtering stirrer for washing, introducing distilled water into the filtering stirrer, and circularly rotating a filter screen bearing the activated carbon in the filtering stirrer in forward and reverse directions at a rotating speed of 20r/min, wherein the temperature range in the filtering stirrer is 45-60 ℃, and the washing time range of the distilled water is 80-120 min;

s5, putting the preliminarily washed activated carbon in the S4 into a washing and spraying device, and carrying out sufficient high-pressure washing and spraying through distilled water until the pH value of the derived sprayed distilled water is between 6 and 7;

s6, guiding the activated carbon after spray washing into a filtering and drying device for full drying again, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

and S7, detecting the moisture of the dried activated carbon by using a particle drying detection instrument, continuously drying unqualified activated carbon, and warehousing and storing qualified activated carbon.

Preferably, the impregnation liquid consists of a potassium sulfate solution and an ammonium persulfate solution, the volume ratio of the potassium sulfate solution to the ammonium persulfate solution is 1:1, the concentration of the potassium sulfate solution is 3-5mol/L, and the concentration of the ammonium persulfate solution is 0.5-1 mol/L.

Preferably, the moisture content of the dried activated carbon is less than or equal to 3 percent, and the dried activated carbon is a qualified product.

Preferably, the temperature rising speed of the filtering stirrer for heating and washing the activated carbon in the step S4 is 2-5 ℃/min.

Preferably, the pH value of the distilled water introduced in the step S4 is in the range of 6-7, and the mass ratio of the distilled water to the fully dried activated carbon is 3: 1.

Preferably, the organic material of the activated carbon is wood or straw, and the crushing particle size of the activated carbon is 2000-5000 meshes.

(III) advantageous effects

The invention provides a washing and drying process for preparing activated carbon. The method has the following beneficial effects:

this washing drying process is used in active carbon preparation, carry out the high temperature soaking washing to the active carbon through the flooding liquid, the surface adsorption performance of effectual increase active carbon, improve the comprehensive performance of active carbon, apply highly compressed mode to the flooding liquid, accelerate the reaction rate between flooding liquid and the active carbon, shorten active carbon manufacturing procedure time, and carry out drying process with the active carbon that the flooding was accomplished, make the active carbon can carry out thorough drying with the flooding liquid and get rid of, reduce the quantity that follow-up washing soaked the distilled water, increase the reaction efficiency between active carbon and the flooding liquid, adopt the distilled water to soak the active carbon after the flooding, then wash through a large amount of distilled water high pressure, make the active carbon of distilled water neutralization acidity, furthest reduces the chemical residue in the active carbon micropore, improve the performance of active carbon.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a washing and drying process for preparing activated carbon comprises the following preparation steps:

s1, putting the activated carbon obtained through carbonization and activation treatment into high-pressure impregnation equipment, and introducing impregnation liquid, wherein the mass ratio of the impregnation liquid to the activated carbon is 1:1, the impregnation liquid consists of a potassium sulfate solution and an ammonium persulfate solution, the volume ratio of the potassium sulfate solution to the ammonium persulfate solution is 1:1, the concentration of the potassium sulfate solution is 3-5mol/L, the concentration of the ammonium persulfate solution is 0.5-1mol/L, the organic material of the activated carbon is wood or straw, and the crushing granularity of the activated carbon is 2000-5000 meshes;

s2, heating the high-pressure impregnation equipment to a temperature of 75-100 ℃, wherein the heating speed is 5-8 ℃/min, stirring the impregnation liquid impregnated with the activated carbon by the high-pressure impregnation equipment at a rotating speed of 5-10r/min, and pressurizing a closed space in the high-pressure impregnation equipment to 1.5-2 standard atmospheric pressures;

s3, uniformly placing the impregnated activated carbon into a filtering and drying device for full drying, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

s4, putting the fully dried activated carbon into a filtering stirrer for washing, introducing distilled water into the filtering stirrer, performing forward and reverse circulation rotation of a filter screen bearing the activated carbon in the filtering stirrer at a rotating speed of 20r/min, wherein the temperature range in the filtering stirrer is 45-60 ℃, the time range of washing the distilled water is 80-120min, the heating speed of the filtering stirrer for heating and washing the activated carbon is 2-5 ℃/min, the pH range of the distilled water introduced into the filtering stirrer is 6-7, and the mass ratio of the distilled water to the fully dried activated carbon is 3:1

S5, putting the preliminarily washed activated carbon in the S4 into a washing and spraying device, and carrying out sufficient high-pressure washing and spraying through distilled water until the pH value of the derived sprayed distilled water is between 6 and 7;

s6, guiding the activated carbon after spray washing into a filtering and drying device for full drying again, wherein the drying temperature range of the filtering and drying device is 60-80 ℃, and recovering the gas obtained by the filtering and drying device;

and S7, detecting the moisture of the dried activated carbon by using a particle drying detection instrument, continuously drying the unqualified activated carbon, warehousing and storing the qualified activated carbon, wherein the moisture content of the dried activated carbon is less than or equal to 3 percent and is a qualified product.

In conclusion, the impregnation liquid is used for soaking and washing the activated carbon at high temperature, so that the surface adsorption performance of the activated carbon is effectively improved, the processing procedure time of the activated carbon is shortened, the impregnated activated carbon is soaked and washed by distilled water, and then a large amount of distilled water is used for washing at high pressure, so that the distilled water neutralizes the acidic activated carbon, the chemical residues in micropores of the activated carbon are reduced to the maximum extent, and the use performance of the activated carbon is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.