Filtration column for treating phosphorus-containing sewage, and treatment method for phosphorus-containing sewage

A treatment method and filter column technology are applied in the field of treatment of phosphorus-containing sewage in chemical fertilizer plants, methods and supporting equipment, which can solve the problems of slow natural settlement, short service period, slow treatment speed, etc., so as to alleviate pollution and pressure and prolong use. The effect of cycle and high practical value

Inactive Publication Date: 2014-05-21
江苏晋煤恒盛化工股份有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The biological method of phosphorus removal is to absorb and utilize the phosphate in the wastewater by the phosphorus accumulating bacteria in the activated sludge, and remove it from the water. Although the operation cost of this method is low, the treatment speed is slow, especially for high The treatment effect of concentrated phosphate wastewater is not good
The chemical method mainly uses some dephosphorization agents to react with soluble phosphate in water to form insoluble phosphate, and then dephosphorize by natural sedimentation. Although this method can remove phosphorus well, it is less efficient due to the slow natural sedimentation. Low
The physical method is mainly filter adsorption, which uses activated carbon and other adsorption materials as the filter layer to adsorb and remove phosphorus in sewage. The disadvantage of this method is that the adsorption activity and permeability of the filter layer will gradually decrease with time, the service life is short, and it needs to be replaced frequently Filter layer, inconvenient to use

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  • Filtration column for treating phosphorus-containing sewage, and treatment method for phosphorus-containing sewage

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Experimental program
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Effect test

Embodiment 1

[0021] According to the mass fraction ratio, 30 parts of perlite (10 orders), 10 parts of ferric chloride (20 orders) and 10 parts of straw ash (50 orders), wherein the mass fraction of charcoal is 5%, the mass fraction of silicon dioxide 20%) mix uniformly, form reaction layer 3 in the PVC pipe of packing into, and the diameter of described PVC pipe is 5cm, height is 50cm, and the lower end has 200 order gauze 4, and the height of reaction layer 3 is controlled at about 20cm, in The reaction layer 3 is covered with a quartz sand layer 2, and the height of the quartz sand layer 2 is 5 cm. The phosphorus-containing sewage 1 of the chemical fertilizer plant is sprayed over the filter column and introduced through the filter column. The flow rate of the phosphorus-containing sewage 1 is set to 0.5L / min, and the water temperature of the phosphorus-containing sewage 1 is maintained at about 10°C. When the phosphorus-containing sewage 1 flows through the reaction layer 3, part of th...

Embodiment 2

[0023] According to the mass fraction ratio, 20 parts of perlite (20 orders), 10 parts of ferric chloride (30 orders) and 10 parts of straw ash (100 orders, wherein the mass fraction of charcoal is 6%, and the mass fraction of silicon dioxide is 30 %) mix evenly, pack into PVC pipe and form reaction layer 3, the diameter of described PVC pipe is 7cm, height is 60cm, and the lower end has 250 order gauze 4, and the height of reaction layer 3 is 25cm, is covered on reaction layer 3 The quartz sand layer 2, the height of the quartz sand layer 2 is 7cm. Phosphorus-containing sewage 1 from the fertilizer plant is introduced and passed through the filter column by spraying on the top of the filter column. The flow rate of phosphorus-containing sewage 1 is set to 0.7L / min, and the temperature of phosphorus-containing sewage 1 is maintained at about 15°C. The initial concentration of phosphorus in the phosphorus-containing sewage 1 in this embodiment is 10mg / L, after treatment, the wa...

Embodiment 3

[0025] According to the mass fraction ratio, 10 parts of perlite (40 orders), 10 parts of ferric chloride (50 orders) and 20 parts of straw ash (200 orders, wherein the mass fraction of carbon is 10%, and the mass fraction of silicon dioxide is 20%) mix evenly, pack into PVC pipe to form reaction layer 3, the diameter of described PVC pipe is 10cm, height is 70cm, and the lower end has 300 order gauze 4, and the height of reaction layer 3 is 30cm, above reaction layer 3 Covered with a quartz sand layer 2, the height of the quartz sand layer 2 is 10 cm. Phosphorus-containing sewage 1 from the fertilizer plant is introduced and passed through the filter column by spraying on the top of the filter column. The flow rate of phosphorus-containing sewage 1 is set to 1L / min, and the water temperature of phosphorus-containing sewage 1 is maintained at about 25°C. The concentration of phosphorus in the phosphorus-containing sewage 1 in the present embodiment is 3mg / L, after the treatmen...

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Abstract

The invention relates to a filtration column for treating phosphorus-containing sewage. The filtration column comprises a quartz sand layer positioned at an upper layer, and a reaction layer positioned at a lower layer; the reaction layer is a composite material layer which comprises the following components in parts by mass: 10-30 parts of perlite, 10-20 parts of ferric chloride, and 10-20 parts of straw ash. A treatment method for phosphorus-containing sewage comprises the step: treating the phosphorus-containing sewage, introducing the phosphorus-containing sewage in an atomized manner and flowing through the filtration column. The filtration column can make up for the deficiencies of the prior art, has stronger practical values, as well as high permeability, fixation and adsorption performances, and is capable of effectively removing phosphorus in the phosphorus-containing sewage, the filtration column is long in service cycle, low in cost, and environment-friendly, and has higher practical values; and the straw ash in the filtration column comes from a power plant, thus changing wastes into valuables, and relieving the pollution and pressure to the environment as the straw ash in the power plant is piled up.

Description

technical field [0001] The invention relates to a method for treating sewage and its supporting equipment, in particular to a method and supporting equipment for treating phosphorus-containing sewage in chemical fertilizer plants. Background technique [0002] In the process of fertilizer production, my country's chemical fertilizer factories will produce phosphorus-containing wastewater, the main components of which are phosphate and a small amount of organic phosphorus. If it is discharged randomly, it will lead to eutrophication of lake water and groundwater pollution, so a fast and efficient method is urgently needed. At present, the most widely used wastewater phosphorus removal technologies at home and abroad are biological methods (such as CN201310139268), chemical methods (such as CN201110256781) and physical methods (such as CN201210247140). The biological method of phosphorus removal is to absorb and utilize the phosphate in the wastewater by the phosphorus accumu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/28
Inventor 曹广安宋学武王元邵长安刘琼宋振久
Owner 江苏晋煤恒盛化工股份有限公司
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