Online concentrated continuous flow modular sludge storage tank

Abstract

The invention discloses an online concentrated continuous flow modular sludge storage tank which comprises a plurality of sludge storage tank modules; sludge inlet control valves corresponding to thesludge storage tank modules are arranged on a water inlet pipe, sludge outlet control valves corresponding to the sludge storage tank modules are arranged on a water outlet pipe, and a stirring deviceis mounted in each sludge storage tank module; the number of the storage tank modules is not less than three; wherein a decanting sleeve valve is arranged in each storage tank module, the decanting sleeve valves are connected with a wastewater collection system, and a control system is connected with the sludge inlet control valves, the sludge outlet control valves, the stirring devices and the decanting sleeve valves respectively and controls the storage tanks to operate according to three modes, namely a sludge inlet mode, a concentration mode and a sludge outlet mode. According to the invention, sludge is continuously fed and discharged while being concentrated, so that the efficiency of subsequent sludge treatment facilities is improved, the problems of secondary phosphorus release and the like and shutdown waiting of the sludge treatment facilities are avoided, and the equipment manufacturing cost and cost are reduced.

Description

technical field [0001] The invention relates to an on-line concentrated continuous flow modular mud storage tank, which belongs to the field of water treatment. Background technique [0002] The sludge produced during the biochemical treatment of wastewater has a high water content, so the volume of the raw sludge is large, which makes it difficult to treat, utilize and transport the sludge. Sludge thickening is to reduce the moisture content and volume of sludge through sludge thickening, thereby reducing subsequent treatment costs and energy consumption. There are three commonly used methods for sludge concentration: gravity concentration method, air flotation concentration method and centrifugal concentration method. These three processes have high engineering costs, complex equipment, and heavy operation and maintenance workload. Limited by factors such as cost and land occupation, most small sewage plants do not set up a separate concentration process section. Usually,...

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Problems solved by technology

The disadvantage of this method is that it is impossible to adjust the depth of drainage according to the height of the liquid level. When the outlet of the drain pipe is close to the mud-water interface, suction is prone to occur, and the settled sludge is sucked up and then discharged with the supernatant , causing the sludge to "return muddy" and cause the sludge to lose, and finally enter the sludge treatment system.

In order to avoid sludge suction during drainage, the depth of the supernatant that is often discharged should not be too large, which leads to the inconspicuous concentration effect. Generally, the skimmer is only installed at the upper one-fifth of the effective water depth, and the efficiency of the sludge treatment system is also improved. not obvious

[0004] In addition, when the sludge is concentrated, it is impossible to continuously feed or discharge the sludge at the same time, which will cause two problems: because the sludge cannot be fed continuously, in actual operation, the sludge is often driven into the sludge storage tank in batches in advance, which will cause It causes the sludge to stay in the sludge storage tank for a long time, which leads to the secondary release of phosphorus by phosphorus accumulating bacteria and reduces the efficiency of phosphorus removal in the biochemical system

Sludge discharge facilities also need to be controlled to start and stop multiple times, which will cause a lot of equipment loss; the inability to discharge sludge continuously will cause downtime and waiting time for subsequent treatment facilities, which not only prolongs the labor time of workers, but also easily causes frequent start and stop of equipment and serious wear and tear

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