Purification method for wastewater of ammunition disassembly

A wastewater purification and ammunition technology, which is applied in the field of water purification, can solve the problems of intermittent discharge, ammunition dismantling wastewater purification method is immature, and the water volume is small, so as to achieve high treatment efficiency, complete and thorough ultraviolet ozone oxidation process, and short residence time Effect

Inactive Publication Date: 2008-09-24

ENG DESIGN & RES INST OF GENERAL ARMAMENTS DEPT

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AI-Extracted Technical Summary

Problems solved by technology

[0003] In view of this, in order to overcome the current immature purification method of ammunition dismantling wastewater, and at the same time aiming at the characteristics of small water volume and intermittent discharge of ammunition dismantling wastewater in ea...

Method used

The sump is located underground, and the cement prefabricated board is covered above, and an auxiliary room is...

Abstract

The invention discloses a purification method of ammunition resolving wastewater, which includes the purification steps that: firstly, oil slick and suspended particulates are filtered and removed; secondly, under the irradiation of ultraviolet light, ozone is mixed and reacted with wastewater by the micro bubble form; thirdly, reacted water flows into a biological pool, the biological pool purifies the wastewater and indicates the water quality, and the wastewater reaches the mark and can be discharged outside when in the normal state. Through the reinforced pretreatment, the purification method removes suspended substance and granule precipitate in the wastewater are filtered and removed before the ozone oxidation treatment, the consumption of the suspended substance and the granule precipitate to the ozone during the oxidation is reduced, and the purification method of the ammunition resolving wastewater, which has short detention time, high treatment efficiency, and good yielding water quality, is invented successfully by combining the ozone oxidation and the traditional biological pool technology.

Application Domain

Fatty/oily/floating substances removal devicesWater/sewage treatment by irradiation +4

Technology Topic

ChemistryMicro bubble +10

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Examples

Experimental program(4)

Example Embodiment

[0029] Example one

[0030] A certain ammunition destruction station concentrates on destroying used ammunition. The annual intensive work time is about two weeks, producing 20m of waste water from ammunition dismantling. 3 , It flows into the collecting basin, the size of the existing collecting basin is 3.3m×3.3m×3m, which can meet the requirements.

[0031] The sump is located underground and is covered with prefabricated cement slabs. An auxiliary room is built above the sump to protect the processing equipment and eliminate the noise caused by the air compressor.

[0032] The waste water is pumped into the air flotation filter, and most of the flocs in the waste water are removed under the air flotation action of the air flotation filter, and SS (Suspended Solid) is reduced from 600mg/l of raw water to 100mg/l; The air flotation device has no degradation effect on COD (chemical oxygen demand), but due to the reduction of suspended organic matter, the COD of the raw water is reduced from 800mg/l to 600mg/l; it has no effect on the concentration of TNT dissolved in the wastewater;

[0033] The waste water after air floatation is filtered by the activated carbon filled in the air floatation filter. The particle size of the activated carbon filter material is d min It is 3mm and the thickness of the filter layer is 1.0m. Replace the filter material after the completion of one treatment. After the activated carbon is filtered, the wastewater enters the intermediate water tank.

[0034] The wastewater enters the oxidation tank 2 from the intermediate water tank for oxidation reaction. The oxidation tank 2 is the main equipment for treating organic matter in the wastewater. The main structure of the oxidation tank 2 is as follows: figure 1 Shown. The ozone is mixed with the waste water in the form of tiny bubbles through the aeration tube 7 and reacts with the organic matter in the waste water under the irradiation of the ultraviolet lamp 9. Oxidation tank design processing capacity 0.8m 3 /Day, running two cycles per day, each cycle for 3.5 hours, water inflow for 15 minutes, oxidation reaction for 3.0 hours, and drainage for 15 minutes. Oxidation tank 2 effective volume 0.4m 3 , Size: 1.0×0.5×1.0 (m). The reaction cycle is coordinated with the working hours of the camp, and the two cycles each day are completed within working hours. The TNT concentration in the oxidation tank 2 is 140 mg/L, the ultraviolet light intensity is 1.6 W/L, the ozone dosage is 212 g/h, and the reaction time is 3.0 hours.

[0035] The effluent of oxidation tank 2 is discharged into the biological pond, the area of which is 34m 2, The water depth is 76cm, 5 kinds of aquatic plants such as reeds, rushes, and hornworts are planted, and mussels, snails and white dace are stocked. When the biological growth state in the biological indicator pond is normal, the water storage reaches a certain level and overflows and drains.

[0036] The indicators of wastewater after treatment are as follows:

[0037] Control parameters

[0038] The secondary standard of "Water Pollutant Discharge Standard for Ammunition Charge Industry":

[0039]

[0040] It can be found that the effluent indicators are better than the discharge standards.

[0041] Since the system has been in operation for more than 3 years, the treatment effect is good, and all indicators have reached the emission standards. It has significant military and environmental benefits.

Example Embodiment

[0042] Example two

[0043] It is basically the same as the first embodiment, but the difference lies in:

[0044] Activated carbon filter material, particle size d min 2mm, the thickness of the filter layer is 0.5m.

Example Embodiment

[0045] Example three

[0046] It is basically the same as the first embodiment, but the difference lies in:

[0047] Activated carbon filter material, particle size d min It is 4mm, and the thickness of the filter layer is 1.5m.

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Purification method for wastewater of ammunition disassembly

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Example Embodiment

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Description & Claims & Application Information

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