Preparation and regeneration methods of high-effective carbon-based mercury removal adsorbent

An adsorbent, mercury removal technology, applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve the problems of poor mercury removal effect, complex preparation process, high preparation cost, widening temperature range, simple and acceptable process. Control and reduce the effect of preparation cost

Inactive Publication Date: 2019-11-22
天津浩创节能环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing mercury removal adsorbents mainly have the following problems: on the one hand, there are many components added and the preparation process is complicated, resulting in high preparation co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] A high-efficiency carbon-based mercury removal adsorbent, the specific steps of its preparation method are as follows:

[0023] Step 1: Mix the fly ash with the lye and perform ultrasonic treatment, and etch for 10-12 hours after ultrasonic treatment to obtain etched fly ash;

[0024] Step 2: Add resin balls and dichloroethane into a three-necked flask at a mass ratio of 2:3, mix them uniformly at a temperature of 80°C and a stirring speed of 300-500r / min to prepare a mixed solution;

[0025] Step 3: Add sulfuric acid to the mixed solution prepared in Step 2, continue to stir and heat to 160°C for 6-10 hours, and after cooling to room temperature, filter to obtain sulfonated resin balls;

[0026] Step 4: Put the sulfonated resin ball prepared in Step 3 in dilute sulfuric acid with a concentration of 50-80% for pickling, and then wash with deionized water to neutrality after pickling to prepare the pretreated resin ball;

[0027] Step 5: Mix the pretreated resin ball prepared in s...

Example Embodiment

[0038] Example one

[0039] A method for preparing an efficient carbon-based mercury removal adsorbent, the specific steps are as follows:

[0040] Step 1: Mix the fly ash with the lye and perform ultrasonic treatment, and etch for 10 hours after ultrasonic treatment to obtain etched fly ash;

[0041] Step 2: Add resin balls and dichloroethane into a three-necked flask at a mass ratio of 2:3, and mix them evenly at a temperature of 80°C and a stirring speed of 300r / min to obtain a mixed solution;

[0042] Step 3: Add sulfuric acid to the mixed solution prepared in Step 2, continue to stir and heat to 160°C to react for 6 hours, after cooling to room temperature, filter to obtain sulfonated resin balls;

[0043] Step 4: Put the sulfonated resin balls prepared in step 3 in 50% dilute sulfuric acid for pickling, and then wash with deionized water to neutrality after pickling to prepare pretreated resin balls;

[0044] Step 5: Mix the pretreated resin ball prepared in step 4 with the etched ...

Example Embodiment

[0054] Example two

[0055] A method for preparing an efficient carbon-based mercury removal adsorbent, the specific steps are as follows:

[0056] Step 1: Mix the fly ash with the lye and perform ultrasonic treatment, and etch for 12 hours after ultrasonic treatment to obtain etched fly ash;

[0057] Step 2: Add resin balls and dichloroethane into a three-necked flask at a mass ratio of 2:3, mix them uniformly at a temperature of 80°C and a stirring speed of 500r / min to prepare a mixed solution;

[0058] Step 3: Add sulfuric acid to the mixed solution prepared in Step 2, continue to stir and heat to 160°C for 10 hours, after cooling to room temperature, filter to obtain sulfonated resin balls;

[0059] Step 4: Put the sulfonated resin ball prepared in step 3 in dilute sulfuric acid with a concentration of 80% for pickling, and then wash with deionized water to neutrality after pickling to prepare the pretreated resin ball;

[0060] Step 5: Mix the pretreated resin ball prepared in step ...

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Abstract

The invention provides preparation and regeneration methods of a high-effective carbon-based mercury removal adsorbent. The preparation method comprises the following specific steps: mixing fly ash with alkali liquor, and performing etching; uniformly mixing resin balls and dichloroethane at the temperature of 80 DEG C; adding sulfuric acid, heating the mixture, and cooling and filtering the mixture; acid-washing the resin balls in dilute sulfuric acid, and washing the resin balls with deionized water to be neutral; mixing the pretreated resin balls with etched fly ash, metal halide and alkali, carbonizing the resin balls at a constant temperature, and activating the carbon material at a constant temperature; mixing and modifying the activated carbon material and a metal halide solution; and carrying out heat treatment to prepare the high-effective carbon-based mercury removal adsorbent. The preparation method disclosed by the invention is simple and controllable in process and mild inoperation condition, so that the preparation cost of the mercury removal adsorbent is reduced; the carrier is prepared from two raw materials including the fly ash and the resin balls and is activated and modified, so that the effective temperature range of the carrier and active ingredients of the prepared mercury removal adsorbent is widened, the average mercury removal rate of the mercury removal adsorbent at different temperatures reaches 75 percent, and the mercury removal effect is improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection preparations, in particular to a method for preparing and regenerating an efficient carbon-based mercury-removing adsorbent. Background technique [0002] The current main non-renewable fuels such as oil and natural gas will contain a certain amount of mercury, which will not only pollute containers and pipelines, but as one of the main air pollutants, it will also have a certain negative effect on human health after combustion. Therefore, it is necessary to remove mercury from the tail gas after fuel combustion. The existing mercury removal adsorbents mainly have the following problems: on the one hand, there are many components added and the preparation process is complicated, resulting in high preparation costs; on the other hand, the carrier and active components are greatly affected by the ambient temperature of mercury removal , resulting in a poor mercury removal effect un...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01D53/02B01J20/30
CPCB01J20/20B01D53/02B01J20/103B01D2257/602
Inventor 田永军田晓亮田浩
Owner 天津浩创节能环保设备有限公司
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