A rapid reuse method of cleaning waste liquid produced by an iron bucket crushing and cleaning system
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A cleaning system and waste liquid technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, multi-stage water treatment, etc. big problem
Active Publication Date: 2022-07-22
天津绿展环保科技有限公司
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Problems solved by technology
The first is to purchase sewage treatment equipment by yourself. Due to the large changes in water quality and complex components, it is impossible to choose suitable water treatment equipment, and the later maintenance makes the cost of cleaning waste liquid treatment very high, and the workload of operators is also very large; the second is If you entrust a qualified unit to deal with it, the transportation cost and treatment cost of cleaning waste liquid are also relatively high.
[0005] For the current technology, there is no method that can not only guarantee the simplicity and effectiveness of the method, but also ensure the fast processing and reuse of energy for the treatment of waste liquid from the cleaning of hazardous waste iron drums.
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Embodiment 1
[0023] Example 1: Laboratory test
[0024] The first step: take 50ml of cleaning waste liquid and place it in a beaker, check that its pH value is 13, the standard suspended solids concentration is 1,600,000ppm, and the petroleum concentration is 400,000ppm, and let it stand for 15 minutes. During the standing process, the cleaning liquid waste liquid is gradually divided into upper , middle and lower layers, the colors are dark gray, reddish brown and gray respectively, use the oil separator to remove the oil slick on the upper layer, and leave the solution in the lower layer;
[0025] The second step: add concentrated sulfuric acid to the beaker, adjust the pH value to 4, and leave it to react for 15 minutes. At this time, the washing waste liquid separates out reddish-brown flocs to achieve the demulsification effect;
[0026] The third step: add 1ml of treatment agent to the beaker, and stir for 15s to carry out the first flocculation and decolorization. The main component...
Embodiment 2
[0032] Example 2: On-site treatment of the waste liquid produced by the applicant in the production process
[0033] When the cleaning solution in the production system is used for 30 days, it is found that the concentration of suspended particles in the cleaning solution is too high, which cannot guarantee the cleaning effect of the hazardous waste iron drum. At this time, it is necessary to effectively treat the cleaning waste liquid. In the liquid treatment tank, the standard suspended solids concentration in the waste liquid was 1,700,000 ppm, the petroleum concentration was 300,000 ppm, and the pH value was 14;
[0034] The first step: the cleaning waste liquid in the waste liquid treatment tank is left to settle for 20 minutes, and the cleaning waste liquid is gradually layered, and the colors are dark gray, reddish brown and gray from top to bottom. Leave the remaining layer solution;
[0035] The second step: add concentrated sulfuric acid to the waste liquid treatmen...
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Abstract
The invention relates to a rapid reuse method of cleaning waste liquid produced by an iron bucket crushing and cleaning system, and belongs to the field of hazardous waste treatment; the method comprises the following steps: a first step: taking the cleaning waste liquid produced by the iron bucket crushing and cleaning system, Set aside in the treatment tank, and the oil separator scrapes the upper layer of oil. Step 2: Add an acidic solution to the cleaning waste liquid to adjust the pH value. The third step: adding the treatment agent to the above cleaning waste liquid and stirring it evenly. The fourth step: adding 0.5% polyacrylamide aqueous solution to the above solution. The fifth step: carry out aeration and precipitation on the above-mentioned solution. After aeration and precipitation, the solid-liquid separation of the flocculation solution is carried out to obtain the supernatant liquid and the residue of the bottom layer. . The sixth step is to adjust the pH of the serum to between 7-9 and reuse it. Beneficial effects: the method of the invention has fast processing and recovery speed and low cost, and achieves the purposes of environmental protection, energy saving, high efficiency and cost reduction.
Description
technical field [0001] The invention belongs to the field of hazardous waste treatment, and in particular relates to a rapid reuse method for cleaning waste liquid produced by an iron bucket crushing and cleaning system. Background technique [0002] At present, the domestic treatment method for hazardous waste container iron barrels is to crush and clean the iron barrels. The invention patent of application publication number: CN 110180861 A discloses a clean production method for reusing waste packaging iron barrels. The waste packaging iron drum is broken. Step 2: Soak the iron flakes in the lye solution or spray the iron flakes with the lye solution, control the temperature and alkali concentration, and make the iron flakes react with the lye solution. Step 3: Clean and reuse the iron flakes, The cleaning wastewater is recycled after ultrafiltration. [0003] The applicant is a technology company specializing in hazardous waste treatment and solid waste treatment. The m...
Claims
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