Shandong APRIL SSYMB pulp and paper Corp. Ltd is at Rizhao, Shandong province. The annual production of plant phase I is 315,000 ton fine wood pulp, and 1,000,000 ton fine wood pulp of plant phase II per year. The plant phase II wood pulp line is the biggest single line right now of the world, the most advanced process technology and the equipment, and the highest environment protection level wood pulp line. The wood pulp plant phase II waste water plant treatment capability is 130,000 ton per day. The waste water is mainly from the cooking, washing and screening, bleaching, paper machine and the alkali recycle process segments. The waste water from the different process segments of the wood pulp line is collected by the plant waste water pipe lines and treated at the waste water plant.
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After the three levels deep treatment at the waste water plant, the waste water is supplied to the other company for the manufacture. It saves the water resource and realizes the middle water reuse. The sludge of the waste water treatment is the major solid waste at the pulp and paper industry. It is difficult to treat the sludge. At Shandong APRIL SSYMB pulp and paper Corp., Ltd, the one part sludge is manufactured to the healthy organic fertilizer. The healthy organic fertilizer will be for the forest planting and the agricultural production. The another part of sludge is transferred to the boiler plant as the fuel for the power generation. So the total sludge utilization rate is 100%.
The Metso TS transmitter is installed at the outlet of the sludge mixing tank. The sludge from the primary clarifier, the second clarifier and the flotation tank is mixed at the sludge mixing tank totally. The mixed sludge is transferred to the remote sludge dewater station. At the sludge dewater station, the mixed sludge is added the polymer. After the press and filte dewater of the belt press filter, the sludge is treated for the further drying. The final total solids concentration reaches about 40%. It decreases the sludge bulk and water content. It will be more convenient for the sludge storage and the transportation.
The over high mixed sludge concentration will make the sludge transportation pipe line blocked easily, or it will consume the feed pump more power for the sludge transportation. Metso TS sludge concentration transmitter is installed at the outlet of the sludge mixing tank. By the sludge concentration measurement, it controls the dilution water addition to the mixed sludge transportation pipe line. It will control the sludge concentration at the transportation pipe line at a stable and proper range, and make the sludge transportation more high efficiency and stable.
The TCU installed on site
The sensor installed on site
History measurement data
Display on site