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Investment in the filter running cost and benefit evaluation of a short process, small footprint. Domestic non-ferrous smelting industry the traditional waste acid sewage treatment process, equipment, piping complex, difficult to operate, easy to plug th e pipeline and equipment. Chemical flocculation precipitation combined the Gore filter process once the sewage treatment and solid-liquid separation of waste acid, greatly simplifying the process, and covers an area of only about 1/3 of the traditional craft. The same time, the bypass design can effectively prevent the clogging of the equipment and piping. b. investment, short construction period, low running costs. Greatly simplify the process and filter device configuration, it is necessary to reduce the engineering investment, but also shorten the construction period. Direct investment of nearly 750 million this project, such as using the traditional techniques, it is estimated that the direct investment in 1300 15 million yuan. The precision filter automation control.dust collector bags
The complex composition of this oily wastewater, nature is the harm, and handling difficult, is a major p roblem in the oil industry. A complete flocculation of the effluent, sewage was watery, the contaminants uniformly distributed on the inside, plus flocculant, dirty things to gather together, and then excluded. Due to the oily sewage water oil mix, adding additives to keep oil and water mixed emulsion is difficult to separate. Flocculation difficult role to play. Online adsorption filtered through activated carbon fiber, the characteristics of the activated carbon is concentrated into a fiber mat, and good performance should be higher than that of ordinary activated carbon adsorption effect, In addition, it also has good resistance to high temperature and parsing, can withstand 500 ° c high temperature. Filter process.
To the introduction of balanced pool filter waste acid from the smelting system and acid system sewage mixed; After mixing, the filter by the pump to the aeration tank reaches a certain liquid level in the aeration tanks dosing [ Ca (OH), "about 20% of the carbide slag emulsion, was adjusted to pH value of 7.8 8.0, so that the fluoride ion in the waste acid in sewage, heavy metal ions and arsenic precipitation, according to the content of the sewage waste acid arsenide dosing amount of FeS04, simultaneously to the mixture Walter pressure of about 50kPa air stirred and from the oxidation reaction sufficiently and the promotion of the Fe (OH) 2 flocculation effect good oxidized into Fe (OH) 3 colloid, the wastewater precipitation of arsenious acid and arsenite; After aerating completely, according to the level of content of heavy metal ions in the waste acid effluent, to decide whether to fine-tune the pH of a 9.0 to 8.5; in and aerating the waste acid sewage by Gore membrane filter for solid-liquid separation, The upper supernatant compliance return to the production system recycling, the bottom flowing through the plate and frame filter press filter press, residues harmless stockpiling, filtrate return in the aerati on tank.
Practical applications, the waste acid sewage treatment costs 1.5 2.5 yuan / t, processing costs far lower than the traditional process. c. a high degree of automation, good operating environment. When the membrane surface of the cake to a certain thickness, under the control of the controller can be quickly and automatically to the membrane surface backwash achieve continuous filtration, to overcome the traditional natural precipitation processes in solid-liquid mechanical separation then for the oil industry, the most serious pollution of oily wastewater. After clarifying the supernatant in order to discharge standards multiple separation drawbacks of traditional filtration equipment intermittent operation must be set to the drawbacks of multiple devices, thus effectively reducing the labor intensity, improve on-site operating environment. The control system may be based on a set cycle time, and receive the differential pressure signal for cleaning sewa ge, order signal received successively. The filter manual control: flow is manually controlled automatic filter state, hold down the start button, filter cleaning sewage, the start button is released, stop cleaning the sewage.
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