A sludge pumping speed control system and industrial pump system

Abstract

The utility model relates to a kind of sludge pumping speed control system and industrial pump system, the control system includes buffer hopper, industrial pump, hydraulic station and control cabinet;Radar material level meter and weighing measurement system are set on the buffer hopper, the sludge material level height and sludge weight of buffer hopper are measured respectively;The hydraulic station is connected by hydraulic pipeline and provides power for the operation of industrial pump;The industrial pump is located below the discharge port of buffer hopper bottom, and sludge in buffer hopper is transported to sludge pipeline;Radar material level meter and weighing measurement system are respectively connected with control cabinet signal, control cabinet controls hydraulic station output hydraulic power, and then controls the feed rate of industrial pump;The industrial pump system includes the control system.The utility model can ensure that the pumping control of industrial pump system is stable, reduce the sudden increase and sudden decrease of pumping displacement caused by single radar material level detection bounce, ensure that hydraulic system runs smoothly, prolong the service life of equipment parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of sludge pumping speed control system and industrial pump system, belong to sludge treatment equipment technical field. BACKGROUND

[0002] The treatment process of sludge in sewage treatment plant is as shown in the figure. Figure 2

[0003] The industrial pump system of current sewage treatment plant mainly includes buffer hopper and industrial pump, and radar level gauge is arranged on the buffer hopper to monitor the material level height of sludge. Specifically, the sludge produced by sludge dewatering centrifuge is sent to buffer hopper by shaftless screw conveyor, and the industrial pump at the bottom of buffer hopper pumps the sludge to the far distance silo for storage by sludge pipeline. The radar level gauge monitors the material level of sludge in buffer hopper in real time. The sludge pumping speed of existing industrial pump is linearly related to the material level of buffer hopper, and the pumping speed changes in real time according to the material level of buffer hopper, that is, when the sludge in buffer hopper is less, the pumping speed is slowed down, and when the sludge in buffer hopper is more, the pumping speed is accelerated.

[0004] When the shaftless screw conveyor sends the sludge to the top of buffer hopper, the sludge does not fall vertically into the buffer hopper due to inertia, and splashing exists. When the radar level gauge monitors the material level of buffer hopper in real time, if the radar emitted by the probe monitors the splashing sludge, the material level will appear a high material level jitter, and the pumping speed will also appear jitter, which is easy to damage the equipment and shorten the service life of vulnerable parts. Therefore, a sludge pumping speed control system and industrial pump system capable of ensuring the accuracy of material level detection is needed, which can reduce the sudden increase and decrease of pumping displacement caused by material level detection jitter, ensure the smooth operation of hydraulic system, and prolong the service life of each part of the equipment. SUMMARY

[0005] The utility model aims at overcoming the above-mentioned shortcomings, providing a sludge pumping speed control system and industrial pump system capable of ensuring the accuracy of material level detection and stable pumping control, reducing the sudden increase and decrease of pumping displacement caused by sludge material level detection jitter, ensuring the smooth operation of hydraulic system, and prolonging the service life of each part of the equipment.

[0006] ​The utility model discloses a purpose is realized like this:

[0007] A sludge pumping speed control system, containing buffer hopper, industrial pump, hydraulic station and control cabinet, radar material level meter and weighing measurement system are arranged on the buffer hopper, and the sludge material level height and sludge weight of the buffer hopper are measured respectively, the hydraulic station is connected through hydraulic pipeline and provides power for the operation of industrial pump, the industrial pump is located below the discharge port of the bottom of buffer hopper, and sludge in the buffer hopper is transported to sludge pipeline, the radar material level meter and weighing measurement system are connected with control cabinet signal respectively, and the control cabinet controls the hydraulic station output hydraulic power, and then the feeding speed of industrial pump is controlled.

[0008] Further, the control cabinet is equipped with signal receiving module, central processing unit module and control output module that are connected with each other, the signal receiving module is connected with the radar material level meter and weighing measurement system through signal line electric signal, the central processing unit module calculates the adaptive running speed of industrial pump according to the sludge material level signal and weight data received by the signal receiving module, the control output module outputs the industrial pump running speed signal determined by the central processing unit module to the hydraulic station, and the hydraulic station controls the corresponding speed operation of industrial pump.

[0009] Further, the control cabinet contains PLC system, motor main circuit and control circuit, circuit breaker, contactor, relay and terminal, the PLC system sets the pumping speed of industrial pump as three gears of low speed, medium speed and high speed, and corresponds to the sludge material level below 30%, the material level between 30% and 70% and the material level higher than 70% respectively.

[0010] Further, the upper portion of the buffer hopper is provided with a shaftless screw conveyor, and the sludge after dewatering is transported into the buffer hopper.

[0011] Further, the sludge pipeline is connected with a silo for storing sludge, and the industrial pump pumps the sludge to the silo for storage.

[0012] Further, the industrial pump is one of centrifugal pump, diaphragm pump, screw pump, plunger pump or cam rotor pump.

[0013] An industrial pump system contains the sludge pumping speed control system.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model discloses a sludge pumping speed control system and industrial pump system, set up radar material position meter and weighing measurement system on the buffer hopper, respectively to the sludge material position in the hopper independent monitoring, control cabinet judges two kinds of material position signal and determines the power grading output of hydraulic station according to material position result, ensures the pumping control of industrial pump system steady, reduces the sudden increase and the sudden reduction of pumping displacement caused by sludge material position detection bounce, guarantees the stable operation of hydraulic system, prolongs the service life of each spare part of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural diagram of sludge pumping speed control system of the utility model.

[0017] Figure 2 It is the technological process diagram of sludge treatment of sewage treatment plant.

[0018] Figure 3 It is the pumping speed control logic diagram of industrial pump system of the utility model.

[0019] Among them:

[0020] Buffer hopper 1, industrial pump 2, hydraulic station 3, control cabinet 4, radar material position meter 5, weighing measurement system 6, sludge pipeline 7, hydraulic pipeline 8, signal circuit 9. DETAILED DESCRIPTION

[0021] Embodiment

[0022] See Figure 1 The utility model relates to a kind of sludge pumping speed control system, including buffer hopper 1, industrial pump 2, hydraulic station 3 and control cabinet 4;Radar material position meter 5 and weighing measurement system 6 are set on the buffer hopper 1, respectively measure the sludge material position height and sludge weight of buffer hopper 1;Shaftless screw conveyor is set on the upper portion of buffer hopper 1, and dewatered sludge is transported into buffer hopper 1;Hydraulic station 3 is connected by hydraulic pipeline 8 and provides power for the operation of industrial pump 2;Industrial pump 2 is located below the discharge port of the bottom of buffer hopper 1, and the sludge in buffer hopper 1 is transported to sludge pipeline 7, sludge pipeline 7 is connected to silo that stores sludge, and industrial pump 2 pumps sludge to silo storage;Radar material position meter 5 and weighing measurement system 6 are respectively connected with control cabinet 4 signal, and control cabinet 4 controls the output hydraulic power of hydraulic station 3, to further control the feed rate of industrial pump 2;

[0023] In the sludge treatment process of sewage treatment plant, the types of sludge conveying equipment include centrifugal pump, diaphragm pump, screw pump, plunger pump, cam rotor pump and other industrial pumps. The plunger sludge pump is a large and long-distance conveying equipment. It relies on the hydraulic cylinder to drive the conveying cylinder to reciprocate, and cooperates with the reversing device in the hopper to realize material suction and pumping. It is widely used in sewage treatment plants. The industrial pump in the embodiment is a plunger sludge pump. The industrial pump 2 in the embodiment is a plunger sludge pump.

[0024] The control cabinet 4 is provided with a signal receiving module, a central processor module and a control output module connected in a signal connection mode; the signal receiving module is connected with the radar level meter 5 and the weighing metering system 6 through a signal line 9 in an electrical signal connection mode; the central processor module calculates the adaptive running speed of the industrial pump according to the sludge level signal and the weight data received by the signal receiving module; the control output module outputs the industrial pump running speed signal determined by the central processor module to the hydraulic station 3, so that the hydraulic station 3 controls the industrial pump 2 to run at a corresponding speed.

[0025] Specifically, the control cabinet 4 of the embodiment comprises a main circuit and a control circuit of the motor, and specifically comprises a circuit breaker, a contactor, a soft starter, a time relay, a PLC system, an intermediate relay, a terminal and the like. The main circuit delivers 380V three-phase power to the motor, and ensures the safe and orderly operation of the motor through the circuit breaker and the contactor. The control circuit mainly comprises a PLC system, an intermediate relay and a coil of the contactor; the PLC system sets the pumping speed of the industrial pump 2 to low, medium and high gears, which correspond to the sludge level below 30%, the sludge level between 30% and 70%, and the sludge level above 70% respectively.

[0026] When the shaftless screw conveyor delivers sludge to the top of the buffer hopper 1, due to the inertia of the sludge, the sludge does not fall vertically into the buffer hopper, but splashes. When the radar level meter 5 monitors the level of the buffer hopper in real time, if the radar emitted by the probe monitors the splashing sludge, the level will appear a high level fluctuation. In order to prevent the fluctuation of the pumping speed, which is easy to damage the equipment and shorten the service life of the vulnerable parts, the weighing metering system 6 is used to exclude the level monitoring fluctuation caused by the false monitoring of the radar level meter 5 according to the weight of the buffer hopper 1, so as to ensure the reliability of the level monitoring system.

[0027] Specifically, the weight of the sludge buffer hopper 1 and the height of the sludge have a linear relationship, the weight value of the full material of the buffer hopper 1 is the stop value of the shaftless screw, and the weight values of the low pumping speed and the high pumping speed are set in sequence according to the empirical value. According to the actual needs of the site, the pumping speed of the pumping system can be divided into low speed, normal speed and high speed, when the radar material level and the weight material level are both lower than 30%, the pumping speed is low speed; when the radar material level and the weight material level are both between 30% and 70%, the pumping speed is normal speed; when the radar material level and the weight material level are both higher than 70%, the pumping speed is high speed; the specific operation logic control diagram is shown in Figure 3 . In this way, the sudden increase and decrease of the pumping displacement caused by the material level detection jumping can be reduced, the hydraulic system is stable, and the service life of each part of the equipment is prolonged. Embodiment

[0028] The industrial pump system disclosed by the utility model relates to a sludge pumping speed control system in the embodiment 1, and the working flow chart is shown in Figure 3 . The pumping speed of the pumping system is divided into low speed, normal speed and high speed, when the radar material level and the weight material level are both lower than 30%, the pumping speed is low speed; when the radar material level and the weight material level are both between 30% and 70%, the pumping speed is normal speed; when the radar material level and the weight material level are both higher than 70%, the pumping speed is high speed; the specific operation logic control diagram is shown in Figure 3 . In this way, the sudden increase and decrease of the pumping displacement caused by the material level detection jumping can be reduced, the hydraulic system is stable, and the service life of each part of the equipment is prolonged;

[0029] The industrial pump system is connected with the previous dehydration process, when the industrial pump system sends a stop command, the dehydration equipment must be stopped, otherwise the sludge will accumulate in the buffer hopper 1 and cannot be transported to the storage bin, and sludge overflow will occur; once the dehydration equipment is stopped, the time for restarting is long, which affects production. Therefore, the stop command must be accurate, the radar material level meter 5 and the weighing metering system 6 are used to double monitor the sludge material level of the buffer hopper 1 by the control cabinet 4, the stable operation of the industrial pump system is ensured, frequent problems are prevented, the stop command is not frequently sent, and normal production is affected.

[0030] In addition, it should be noted that the above specific embodiments are only an optimized scheme of the patent, and any changes or improvements made by those skilled in the art according to the above concept are within the protection scope of the patent.

Claims

1. A sludge pumping speed control system characterized by: The application relates to a sludge pumping speed control system, which comprises a buffer hopper (1), an industrial pump (2), a hydraulic station (3) and a control cabinet (4); a radar material level meter (5) and a weighing metering system (6) are arranged on the buffer hopper (1) and are used for respectively measuring the sludge material level height and the sludge weight of the buffer hopper (1); the hydraulic station (3) is connected through a hydraulic pipeline (8) and provides power for the operation of the industrial pump (2); the industrial pump (2) is located below a discharge port at the bottom of the buffer hopper (1) and is used for conveying sludge in the buffer hopper (1) to a sludge pipeline (7); the radar material level meter (5) and the weighing metering system (6) are respectively connected with the control cabinet (4) in signal connection, the control cabinet (4) controls the hydraulic station (3) to output hydraulic power, and then controls the conveying speed of the industrial pump (2).

2. The sludge pumping speed control system of claim 1, wherein: The control cabinet (4) is internally provided with a signal receiving module, a central processor module and a control output module which are connected in signal connection; the signal receiving module is connected with the radar material level meter (5) and the weighing metering system (6) in electric signal connection through a signal line (9); the central processor module calculates the adaptive operation speed of the industrial pump according to the sludge material level signal and the weight data received by the signal receiving module; the control output module outputs the industrial pump operation speed signal determined by the central processor module to the hydraulic station (3), and the hydraulic station (3) controls the industrial pump (2) to operate at the corresponding speed.

3. The sludge pumping speed control system of claim 1, wherein: The control cabinet (4) comprises a PLC system, a motor main circuit and a control circuit, a circuit breaker, a contactor, a relay and a terminal; the PLC system sets the pumping speed of the industrial pump (2) as three gears of low speed, medium speed and high speed, which respectively correspond to the sludge material level being lower than 30%, the material level being between 30% and 70% and the material level being higher than 70%.

4. The sludge pumping speed control system of claim 1, wherein: An unshafted screw conveyor is arranged on the upper portion of the buffer hopper (1) and is used for conveying the dewatered sludge into the buffer hopper (1).

5. The sludge pumping speed control system of claim 1, wherein: The sludge pipeline (7) is connected with a silo for storing sludge, and the industrial pump (2) pumps the sludge to the silo for storage.

6. The sludge pumping speed control system of claim 1, wherein: The industrial pump (2) is one of a centrifugal pump, a diaphragm pump, a screw pump, a plunger pump and a cam rotor pump.

7. An industrial pump system characterized by: The application further discloses the sludge pumping speed control system according to any one of claims 1 to 6.

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