Sludge concentration control device and control method

Abstract

The embodiment of the invention provides a sludge concentration control device and method, and belongs to the technical field of sewage treatment. The sludge concentration control device comprises a sludge storage tank, a residual sludge pump and a sludge concentration adjusting mechanism, the sludge storage tank is provided with a sludge production pipe, and the sludge production pipe is used for conveying sludge to the dehydrator; the excess sludge pump is communicated with the sludge storage tank and is used for inputting excess sludge into the sludge storage tank; the sludge concentration adjusting mechanism comprises a suction part and at least two groups of water pumping pipe assemblies, and the suction part is used for enabling the water pumping pipe assemblies to suck supernate in the sludge storage tank; wherein the extending lengths, located in the sludge storage pool, of the multiple sets of water pumping pipe assemblies are distributed in a progressive mode, so that at least one set of water pumping pipe assemblies in the multiple sets of water pumping pipe assemblies can pump supernate at different sludge heights in the sludge storage pool. The sludge concentration control device can continuously improve the sludge concentration in the sludge storage tank, shortens the operation time of the dehydrator, and reduces the operation energy consumption.

Description

technical field [0001] The present application relates to the technical field of sewage treatment, in particular, to a sludge concentration control device and control method. Background technique [0002] At present, the excess sludge of the sludge treatment plant is discharged to the structure. In order to prevent the phenomenon of anaerobic phosphorus release caused by the sludge staying for too long, a sludge storage tank is usually designed to temporarily store the excess sludge. After dehydration by dehydrator, it is shipped out. The traditional mud storage tank uses a fixed supernatant discharge port on the top of the tank, relying on manual observation of the liquid level of the supernatant, or even the mud level, and drains the supernatant in the mud storage tank through the fixed supernatant discharge port , has the following defects: [0003] When the mud level in the mud storage tank is higher than the discharge port, the sludge will be lost with the cement when...

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Problems solved by technology

[0003] When the mud level in the mud storage tank is higher than the discharge port, the sludge will be lost with the cement when the supernatant is discharged, and the sludge discharge effect of the biological system will not be achieved; when the mud level is lower than the discharge port, since the discharge port is located in the pool The top, whose position is fixed, makes the supernatant liquid in the sludge storage tank not exhausted, so the concentration of sludge entering the desilting equipment through the sludge production pipe is low, resulting in long operation time of the desilting equipment, low sludge production efficiency, and energy High energy consumption greatly reduces the operating efficiency of the dehydrator, and the dehydrator cannot be shut down in order to meet the production needs, so that the dehydrator cannot be maintained normally and increases the risk of equipment failure rate

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