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Treatment method and system for biomass ash

A biomass ash and treatment method technology, applied in the direction of sustainable waste treatment, solid waste management, solid waste removal, etc., can solve the problems of high cost and difficult to use, so as to save costs and reduce secondary pollution , The effect of reducing the cost of flue gas treatment

Pending Publication Date: 2019-11-29
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

How to use appropriate technology to make full use of these resources at a lower cost and with a relatively simple process is a problem. Many institutions and research groups at home and abroad have conducted related research on this issue. For example, the invention patent application number is 201510402249 .X’s patent uses biomass ash to prepare silica microspheres with low specific surface area, activated carbon and nitrogen, phosphorus and potassium compound fertilizers, and another example is the invention patent of 201310315634.1, which uses biomass fly ash to prepare high-quality potassium-based compound fertilizers and inorganic silicon compounds As well as activated carbon products, however, the above-mentioned patents are expensive because of the introduction of acid and alkali as treatment, so it is difficult to use them in practical power plants

Method used

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  • Treatment method and system for biomass ash

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Experimental program
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Effect test

Embodiment 1

[0044] The processing method of biomass fly ash comprises the following steps (its process flow chart is as follows figure 1 shown):

[0045] Step 1: After sieving the biomass fly ash, weigh 20g as a group to be processed.

[0046] The biomass fly ash selected in step 1 is the 2# boiler fly ash of a certain biomass power plant, which is sieved through an 80-mesh sieve, and the diameter is less than 0.2mm.

[0047] Step 2: Place the weighed 20g of fly ash in an ultrasonic cleaner, add 100ml of deionized water according to the liquid-solid ratio of 5:1, mix the slurry and stir evenly.

[0048] The ultrasonic cleaner selected in step 2 is DOYES-002 type, and the ultrasonic power is 120W.

[0049] Step 3: The first ultrasonic leaching treatment at 25°C for 2 minutes, filtering with filter paper, collecting the filtrate and filter residue, taking the filtrate for ICP analysis, K + The leaching concentration reached 1080mg / L, the dissolution rate reached 13.45%, Na + The leachi...

Embodiment 2

[0052] The processing method of biomass fly ash comprises the following steps:

[0053] Step 1: After sieving the biomass fly ash, weigh 20g as a group to be processed.

[0054] The biomass fly ash selected in step 1 is the 2# boiler fly ash of a certain biomass power plant, which is sieved through an 80-mesh sieve, and the diameter is less than 0.2mm.

[0055] Step 2: Place the weighed 20g of fly ash in an ultrasonic cleaner, add 100ml of deionized water according to the liquid-solid ratio of 5:1, mix the slurry and stir evenly.

[0056] The ultrasonic cleaner selected in step 2 is DOYES-002 type, and the ultrasonic power is 120W.

[0057] Step 3: The first ultrasonic leaching treatment at 25°C for 5 minutes, filtering with filter paper, collecting the filtrate and filter residue, taking the filtrate for ICP analysis, K + The leaching concentration reached 2176mg / L, the dissolution rate reached 27.1%, Na + The leaching concentration reached 142mg / L, and the dissolution rat...

Embodiment 3

[0060] The processing method of biomass fly ash comprises the following steps:

[0061] Step 1: After sieving the biomass fly ash, weigh 20g as a group to be processed.

[0062] The biomass fly ash selected in step 1 is the 2# boiler fly ash of a certain biomass power plant, which is sieved through an 80-mesh sieve, and the diameter is less than 0.2mm.

[0063] Step 2: Place the weighed 20g of fly ash in an ultrasonic cleaner, add 100ml of deionized water according to the liquid-solid ratio of 5:1, mix the slurry and stir evenly.

[0064] The ultrasonic cleaner selected in step 2 is DOYES-002 type, and the ultrasonic power is 120W.

[0065] Step 3: The first ultrasonic leaching treatment at 25°C for 10 minutes, filtering with filter paper, collecting the filtrate and filter residue, taking the filtrate for ICP analysis, K + The leaching concentration reached 2850mg / L, the dissolution rate reached 35.41%, Na + The leaching concentration reached 185mg / L, and the dissolution r...

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Abstract

The invention discloses a treatment method and system for biomass ash. The treatment method comprises the following steps: sieving the biomass ash; mixing the ash with a particle size which is less than a set particle size with water, carrying out ultrasonic enhanced leaching, and filtering to obtain a leachate and filter residue; using the leachate as a desulfurization and denitrification slurry,or concentrating the leachate as a chemical fertilizer raw material; and using the filter residue as a cement and concrete building material or a construction project raw material. The ultrasonic enhanced leaching is carried out on the ash through an ultrasonic technology, leaching for heavy metal ions can be remarkably reduced compared with acid liquid leaching while easily-soluble ions can be efficiently leached, and then the content of the heavy metal ions in the leachate is remarkably reduced. When the leachate is adopted as a desulfurization and denitrification solution, and a desulfurization and denitrification product is used as a chemical fertilizer or the leachate is directly used as a chemical fertilizer after being concentrated, the secondary pollution of the heavy metal ions in the leachate to soil can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of processing and utilization of biomass boiler fly ash, and in particular relates to a method and system for processing biomass ash. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily to be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Energy shortage is a major problem facing the world today. At present, the energy used in the world is mainly fossil energy, mainly including coal, oil, and natural gas. The continuous development of mineral energy will eventually lead to energy shortages, and also cause serious problems such as global environmental pollution. Human beings are facing enormous pressure from population, resources and environment in the...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C05G1/00C04B7/28C04B18/10
CPCB09B3/00B09B5/00C04B7/28C04B18/101C05G1/00Y02W30/91Y02P40/10
Inventor 韩奎华朱应泉龙慎伟任科吴焕廷陈宪科张运虎李冠兵牛胜利齐建荟刘文洋
Owner SHANDONG UNIV
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