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Method for treating semi-dry desulfurization ash
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A technology of semi-dry desulfurization and treatment method, applied in the field of semi-dry desulfurization ash treatment, can solve problems such as expensive treatment, and achieve the effect of improving quality, good effect and strengthening purification
Pending Publication Date: 2022-03-25
上海电气电站环保工程有限公司
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[0003] Due to process limitations, CaSO in desulfurization ash 4 Less content, calcium sulfite CaSO 3 The content is relatively large, and contains some unreacted Ca(OH) 2 , cannot be used in the cement process or construction industry, it is a solid waste and needs to be disposed of at a cost
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Embodiment 1
[0030] The invention provides a treatment method for semi-dry desulfurization ash, the specific treatment steps are as follows:
[0031] Step 1: Add the measured desulfurization ash into the oxidation tank, add water and stir for 5 minutes, add hydrogenperoxide, and continue stirring for 30 minutes. During the stirring process, air is introduced into the bottom of the inner side of the oxidation tank to obtain a slurry;
[0032] Step 2: Put the slurry into the dehydrator through the slurry pump for dehydration to obtain solid products and waste water;
[0033] Step 3: Add compound treatment agent to the wastewater, continue to stir for 30 minutes, and perform ultrasonic treatment for 5 minutes at the same time, and then pump it into the separation device through the wastewater pump to obtain separated water and waste residue;
[0034] Step 4: The separated water can be reused, and the separated waste residue is treated as hazardous waste;
[0049] Take the treatment method of the semi-dry desulfurization ash in the above-mentioned embodiments 1-3, the treatment method of the semi-dry desulfurization ash of the control group 1, the treatment method of the semi-dry desulfurization ash of the control group 2, and the semi-dry desulfurization ash of the control group 3. The treatment method of dry desulfurization ash, the treatment method of semi-dry desulfurization ash of control group 4, the treatment method of semi-dry desulfurization ash of control group 5 and the treatment method of semi-dry desulfurization ash of control group 6, the treatment method of control group 1 The processing method of the semi-dry method desulfurization ash of the comparison with embodim...
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Abstract
The invention discloses a method for treating semi-dry desulfurization ash, and particularly relates to the technical field of desulfurization ash. According to the method, the desulfurized fly ash is added into the oxidation tank, hydrogenperoxide is added, and oxygen is introduced into water for oxidation treatment, so that calciumsulfite and calciumhydroxide can be effectively subjected to oxidation treatment and converted into calciumsulfate and calcium carbonate, and the desulfurized fly ash of solid waste can be effectively and rapidly converted into byproducts capable of bringing benefits; the content of chloride ions in the wastewater can be effectively reduced, the content of residual calcium sulfite and calcium hydroxide in solid products is extremely low, and the conversion rate is high; the composite material of nano manganese dioxide, nano aluminum oxide, nano silver particles, nano zinc oxide and grapheneoxide and reduced grapheneoxide is compounded into the activated carbon, so that the removal effect of chloride ions in the wastewater can be effectively enhanced, the purification of the wastewater generated by desulfurization ash treatment can be further enhanced, and the quality of the wastewater is further improved.
Description
technical field [0001] The invention relates to the technical field of desulfurization ash, more specifically, the invention relates to a semi-dry desulfurization ash treatment method. Background technique [0002] The main component of industrial waste desulfurization ash is gypsum. Gypsum is very cheap, and the cost of recycling and full utilization is high, so it is usually thrown away directly. The desulfurization ash semi-dry desulfurization processing technology is widely used in sintering and pelletizing in my country's iron and steel enterprises at this stage because of its short production process, small footprint, low project investment, simple control, low water consumption, and no white smoke and rain. In the flue gas desulfurization project of Tuanhe coal-fired power plant. Most of the products in wet calcium-based desulfurization are calcium sulfate CaSO 4 , commonly known as gypsum, is a raw material for cement production and can be used in the construction i...
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