An intelligent control method for speed regulation of sludge screw pump

Abstract

The invention provides an intelligent control method for speed regulation of a sludge screw pump. A device involved in the method is composed of a weighing sensor, a pump body, a feeding hopper, a frequency converter, a motor, a feeding port, a discharging port and a PLC (programmable logic controller); the weighing sensor is arranged on the pump body and is used for collecting feeding quantity data in real time; a frequency conversion instruction is sent to the frequency converter of a motor of the sludge screw pump according to the feeding weight under a frequency conversion condition of thesludge screw pump on the basis of the feeding weight set by the PLC; the sludge screw pump executes variable frequency operation and changes along with the change of the feeding quantity, so as to keep a suitable conveying rate of the feed material; when the sludge feeding quantity exceeds a limit value, the sludge screw pump stops feeding. According to the method provided by the invention, the wear rates of a stator and a rotor are effectively reduced, the feeding port is prevented from being blocked, the sludge feeding quantity is kept consistent to the conveying quantity of the sludge screw pump, the idle running state can be prevented, efficient and stable running of the sludge screw pump can be guaranteed, the structure is simple, the running and maintenance cost is obviously reduced, the running efficiency is increased and the construction of unmanned factories is realized.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an intelligent control method for speed regulation of a sludge screw pump. Background technique [0002] In the sewage treatment process, the screw pump is generally used to complete the transportation of dewatered sludge. Due to the high viscosity of the dewatered sludge, it is easy to harden and form agglomerates. Therefore, the sludge is often suspended between the hopper and the connection port of the transfer pump and cannot be smoothly fed into the pump. This situation is called "bridging". Moreover, the sludge sticks to the wall of the hopper and it is difficult to go down smoothly, so that the speed of sludge discharge cannot keep up with the speed of sludge feeding, and the mud level in the hopper will rise, causing the sludge screw pump to block. At the same time, the amount of sludge fed is small, which is not enough to fill the gap between the stator and rot...

AI Technical Summary

Problems solved by technology

Moreover, the sludge sticks to the wall of the hopper and it is difficult to go down smoothly, so that the speed of sludge discharge cannot keep up with the speed of sludge feeding, and the mud level in the hopper will rise, causing the sludge screw pump to block

At the same time, the amount of sludge fed is small, which is not enough to fill the gap between the stator and rotor, and it will also cause dry wear, resulting in serious wear of the stator and rotor

The former needs to be manually rushed to the site in time to unclog, and once the latter occurs, the maintenance time will be long and the maintenance working environment will be harsh, which will directly affect the front-end process

Due to the above-mentioned structural defects in the existing sludge screw pump, the operating efficiency of the equipment is affected, and the cost and time of manual dredging are increased.

There is a problem of inconsistency between the amount of sludge fed and the amount delivered by the screw pump. The sludge screw pump is often in a dry running state, which leads to equipment wear and tear, resulting in a high failure rate, increasing operation and maintenance costs, and restricting the "unattended factory area." " build

[0003] Adjusting the sludge conveying speed of the sludge screw pump according to the amount of sludge feeding to ensure the efficient operation of the sludge screw pump is the key to solving the above problems. At present, there is no effective related technical solution

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