Sludge dewatering, dosing and conditioning device

Abstract

The utility model provides a sludge dewatering dosing conditioning device which comprises a sludge storage tank, a sludge conditioning tank, a sludge dewatering machine, a medicine soaking machine and a control system, the output end of the sludge storage tank is connected with the input end of the sludge conditioning tank, and a sludge concentration meter and an electromagnetic flowmeter are arranged between the sludge storage tank and the sludge conditioning tank. The output end of the medicine soaking machine is connected with the input end of the sludge conditioning tank, the dosing pump and the diluting device are arranged between the medicine soaking machine and the sludge conditioning tank, the sampling pump is arranged on the sludge conditioning tank, the output end of the sludge conditioning tank is connected with the input end of the sludge dewatering machine, and the control system is electrically connected with the dosing pump, the sludge concentration meter and the electromagnetic flowmeter. According to the utility model, the real condition of sludge medicament conditioning is tracked through instrument feedforward, feedback and timely flocculant dosage, so that the medicament adding process is prevented from being influenced by the running condition of dewatering equipment, thereby realizing the accurate adding of the dewatering medicament, avoiding the excessive consumption of the medicament and reducing the running cost of a sludge dewatering system.

Description

Technical Field

[0001] The utility model relates to the technical field of industrialized production equipment for sludge treatment, in particular to a sludge dehydration and dosing conditioning device. Background Art

[0002] In order to ensure the moisture content requirements of the sludge transported from the sewage plant, the remaining sludge needs to be conditioned by adding a high molecular flocculant (hereinafter referred to as flocculant) before mechanical dehydration. In actual work, the dosage of flocculant is artificially determined according to the inlet sludge flow rate and solid content, and once determined, it often remains unchanged for a long time. In addition, in order to maintain the stability of the desludge system, the operator does not consider the changes in the front-end sludge concentration, and often overdoses according to the "safe dosage", resulting in waste of reagents. In fact, not only the sludge concentration, but also the flow of the sludge to be dehydrated fluctuates with the operating conditions, and the two cause changes in the absolute dry amount of sludge. At this time, if the amount of absolute dry sludge increases, but the dosage of flocculant does not increase, it will affect the treatment effect, showing that the mud cake thickness is reduced and the supernatant is turbid; on the contrary, if the amount of absolute dry sludge decreases, the dosage of flocculant does not decrease, resulting in waste of flocculant, and the increase in treatment effect is not obvious, and even "re-stabilization" leads to difficulties in dehydration.

[0003] The existing traditional technology adopts the traditional manual dosing control method, lacks the necessary instruments, and cannot detect the solid content of the sludge to be treated online. The dosing of flocculants is determined according to human experience and remains unchanged for a long time. The consumption of chemicals is large and the dosing method is relatively extensive.

[0004] Patent technology 1, the existing Chinese patent with publication number CN209242897U, discloses a device for precise control of dosing of sludge centrifugal dehydration. The patent monitors the dehydration system's inlet flow, inlet concentration and outlet concentration in real time, calculates the dosage of the agent by inputting the sludge concentration and sludge flow; and calculates the difference Gk1 between the outlet solid content and the target solid content (G) by monitoring the outlet concentration meter, so that Gk1 is maintained near G.

[0005] Patent technology 2, the existing Chinese patent with publication number CN219342001U, discloses a device for precise dosing control of sludge centrifugal dehydration. The patent monitors the solid content of sludge entering the sludge centrifugal dehydrator in real time, sets the dosing ratio of the dehydrating agent, further adjusts the dosing amount according to the solid content in the filtrate, and uses the above monitoring means to control the operating frequency of the dosing pump to accurately add the dehydrating agent.

[0006] The above two patented technologies have the following problems in their addition methods: the mud concentration described in Patented Technology 1 and the solid content of the filtrate described in Patented Technology 2 are both affected by the operating conditions of the dehydration equipment, such as the dehydration machine filtration time, filtration pressure, filter cloth clogging condition, centrifugal index and other factors. The control relationship between the key parameters obtained by the two patented technologies (referring to the mud concentration described in Patented Technology 1 and the solid content of the filtrate described in Patented Technology 2) and the flocculant dosage has many interference items. As the system operation time increases, such as factors such as filter cloth clogging and aging, the control relationship between the flocculant dosage and the characteristic indicators described in the above two patents will be affected by the operating conditions of the filter press and may be misjudged.

[0007] Therefore, the inventors believe that it is necessary to provide a sludge dehydration and dosing conditioning device that can achieve accurate dosing of flocculants, while ensuring the conditioning effect and saving the consumption of chemicals. Utility Model Content

[0008] In view of the defects in the prior art, the utility model aims to provide a sludge dehydration and dosing conditioning device.

[0009] According to the utility model, a sludge dehydration and dosing conditioning device is provided, comprising: a sludge storage tank, a sludge conditioning tank, a sludge dehydrator, a drug soaking machine and a control system, the output end of the sludge storage tank is connected to the input end of the sludge conditioning tank, a sludge concentration meter and an electromagnetic flowmeter are arranged between the sludge storage tank and the sludge conditioning tank, the output end of the drug soaking machine is connected to the input end of the sludge conditioning tank, a dosing pump and a dilution device are arranged between the drug soaking machine and the sludge conditioning tank, a sampling pump is arranged on the sludge conditioning tank, the output end of the sludge conditioning tank is connected to the input end of the sludge dehydrator, and the control system is electrically connected to the dosing pump, the sludge concentration meter and the electromagnetic flowmeter respectively.

[0010] Preferably, a sludge lifting pump is provided between the sludge storage tank and the sludge conditioning tank, and the sludge storage tank transfers the sludge to the sludge conditioning tank through the sludge lifting pump.

[0011] Preferably, the sludge storage tank is connected to the sludge conditioning tank via a sludge conveying pipeline, and the sludge inlet of the sludge conditioning tank is arranged in the middle or lower part of the sludge conditioning tank.

[0012] Preferably, the sludge concentration meter and the electromagnetic flowmeter are both arranged inside the sludge conveying pipeline.

[0013] Preferably, the dilution device is connected to the sludge conditioning tank via a pipeline, and the drug inlet of the sludge conditioning tank is arranged in the middle or upper part of the sludge conditioning tank.

[0014] Preferably, the concentration of the flocculant input into the sludge conditioning tank is below 0.3%.

[0015] Preferably, an agitator is provided inside the sludge conditioning tank, and the rotation speed of the agitator is 25-45 rpm / min.

[0016] Preferably, the sampling pump is connected to the sludge conditioning tank via a water suction pipeline, and the sampling outlet of the sludge conditioning tank is arranged in the middle of the sludge conditioning tank.

[0017] Preferably, an image observer is provided on the water suction pipeline of the sampling pump, and the control system is electrically connected to the image observer.

[0018] Preferably, the sludge conditioning tank is connected to the sludge dewatering machine via a sludge discharge pipe, and the sludge discharge port of the sludge conditioning tank is arranged at the lower part of the sludge conditioning tank.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model observes the flocculation state through the sampling pump, and timely adjusts the flow rate of the dosing pump according to the conditioning effect inside the sludge conditioning tank, thereby adjusting the amount of flocculant in the dilution device, tracking the actual condition of sludge agent conditioning, and avoiding the dosing process from being affected by the operating condition of the dehydration equipment, thereby achieving accurate dosing of dehydration agents, avoiding excessive consumption of drugs, and reducing the operating cost of the sludge dehydration system.

[0021] 2. The utility model sets a sludge concentration meter and an electromagnetic flowmeter on the sludge conveying pipeline of the sludge storage tank, sets an image observer on the water suction pipeline of the sampling pump, and uses instrument feedforward and feedback to timely adjust the dosage according to the quality of the incoming sludge, realize accurate addition of flocculants, avoid the influence of human operation errors, and make the sludge conditioning effect more stable and the guarantee rate higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 The utility model is mainly a schematic diagram of a sludge dehydration and dosing conditioning device.

[0024] Reference numerals:

[0025] Sludge storage tank 1 Sludge lifting pump 2 Sludge conditioning tank 3

[0026] Sludge dewatering machine 4 Dosing machine 5 Dosing pump 6

[0027] Dilution device 7 Sludge concentration meter 8 Electromagnetic flow meter 9

[0028] Control system 10 Image observer 11 Sampling pump 12 DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0030] like Figure 1 As shown, a sludge dehydration and dosing conditioning device provided by the utility model includes a sludge storage tank 1, a sludge conditioning tank 3, a sludge dewatering machine 4, a drug soaking machine 5 and a control system 10. The output end of the sludge storage tank 1 is connected to the input end of the sludge conditioning tank 3, a sludge concentration meter 8 and an electromagnetic flowmeter 9 are arranged between the sludge storage tank 1 and the sludge conditioning tank 3, the output end of the drug soaking machine 5 is connected to the input end of the sludge conditioning tank 3, a dosing pump 6 and a dilution device 7 are arranged between the drug soaking machine 5 and the sludge conditioning tank 3, a sampling pump 12 is arranged on the sludge conditioning tank 3, the output end of the sludge conditioning tank 3 is connected to the input end of the sludge dewatering machine 4, and the control system 10 is electrically connected to the dosing pump 6, the sludge concentration meter 8 and the electromagnetic flowmeter 9 respectively.

[0031] The present application can realize automatic and accurate conditioning before sludge dehydration, avoid excessive addition of flocculating agents, avoid the "restability" phenomenon in the flocculation process, and ensure the sludge conditioning effect. The residual sludge is multiplied by the values ​​measured by the electromagnetic flowmeter 9 and the sludge concentration meter 8 to obtain the forward feed-forward absolute dry sludge amount, and the initial agent consumption is injected into the sludge conditioning tank 3 according to the absolute dry sludge amount. After conditioning, the flocculation state of the sample extracted by the sampling pump 12 is observed, the state of the flocs is analyzed, and converted into the flocculant dosage for accurate feedback.

[0032] A sludge lifting pump 2 is provided between the sludge storage tank 1 and the sludge conditioning tank 3 , and the sludge storage tank 1 transfers the sludge to the sludge conditioning tank 3 through the sludge lifting pump 2 .

[0033] The sludge storage tank 1 is connected to the sludge conditioning tank 3 through a sludge delivery pipeline, and the sludge inlet of the sludge conditioning tank 3 is arranged in the middle or lower part of the sludge conditioning tank 3. The sludge concentration meter 8 and the electromagnetic flowmeter 9 are both arranged inside the sludge delivery pipeline.

[0034] The diluting device 7 is connected to the sludge conditioning tank 3 through a pipeline, and the drug inlet of the sludge conditioning tank 3 is arranged in the middle or upper part of the sludge conditioning tank 3.

[0035] The concentration of the flocculant input into the sludge conditioning tank 3 is below 0.3%.

[0036] An agitator is arranged inside the sludge conditioning tank 3, and the rotation speed of the agitator is 25-45 rpm / min.

[0037] The sampling pump 12 is connected to the sludge conditioning tank 3 through a water suction pipeline, and the sampling outlet of the sludge conditioning tank 3 is arranged in the middle of the sludge conditioning tank 3 .

[0038] An image observer 11 is provided on the water suction pipeline of the sampling pump 12, and the control system 10 is electrically connected to the image observer 11. For example, an infrared camera is used to take pictures, and through big data image recognition technology, the data such as the looseness and density of the alum flowers after conditioning, the feathering state of the alum flowers' edges, and the alum flowers' proportion are compared, and the fuzzy judgment converts the above data control amount into the precise control amount of the flocculant, avoiding the influence of the dehydration equipment's operating conditions, and establishing a direct mapping relationship between the flocculant addition and the instrument evaluation feedback index.

[0039] The sludge conditioning tank 3 is connected to the sludge dewatering machine 4 through a sludge discharge pipeline, and the sludge discharge port of the sludge conditioning tank 3 is arranged at the lower part of the sludge conditioning tank 3. The sludge dewatering machine 4 can carry out the next process by transporting the dewatered sludge for disposal or discharging the filtrate.

[0040] The sludge dehydration dosing conditioning device of the present application is a dosing control device combining feedforward + feedback.

[0041] The excess sludge is lifted from the sludge storage tank 1 to the sludge conditioning tank 3 by the sludge lifting pump 2. An electromagnetic flowmeter 9 and a sludge concentration meter 8 are set between the sludge lifting pump 2 and the sludge conditioning tank 3. The electromagnetic flowmeter 9 detects the input sludge flow Q, and the pipeline sludge concentration meter 8 detects the MLSS of the excess sludge. After the two collect signals, they are calculated by the controller of the control system 10 to obtain the absolute dry sludge volume. The controller sets the system benchmark dosing unit consumption to 3-5kg / tDS. According to the calculation results, the dosing pump 6 is controlled to change frequency and the initial drug consumption is injected into the sludge conditioning tank 3. The drug is prepared by the flocculant soaking machine 5 and diluted to a concentration of less than 0.3% after maturation. The sludge conditioning tank 3 is provided with an agitator, and the rotation speed is controlled at 25-45rpm / min to avoid breaking the alum flocs. To avoid interference from the agitator of the conditioned sludge, the conditioned sludge mixed liquid is pumped out by the sampling pump 12, and the image observer 11 is arranged in the water suction pipeline of the sampling pump 12. The flocculation state of the conditioned sludge is observed by the image observer, and a machine learning method is adopted to analyze the state of the flocs based on the particle size, number, particle clarity, and transmittance of the alum flocs, and the cloud technology big data is used to convert it into the amount of flocculant added for accurate feedback.

[0042] The present application can observe the flocculation state through the sampling pump 12, timely adjust the amount of flocculant in the dilution device 7 according to the conditioning effect inside the sludge conditioning tank 3, track the actual condition of the sludge agent conditioning, and avoid the dosing process being affected by the operating conditions of the dehydration equipment, thereby achieving accurate dosing of the dehydration agent, avoiding excessive consumption of drugs, and reducing the operating cost of the sludge dehydration system. Without directly extracting characteristic value parameters such as the number and size of floc particles, the image data of the alum flower is recognized by the machine, and the big data cloud decision is made to fully avoid the influence of image recognition distortion caused by the large concentration of residual sludge and the overlapping of floc particles.

[0043] This application relies on the intelligent instrument strategy, through online instrument feedforward and feedback, to achieve automatic adjustment of the dosage according to the quality of the incoming sludge, to achieve accurate addition of flocculants, to avoid the influence of human operation errors, to achieve more stable sludge conditioning effect, and to achieve a higher guarantee rate. While ensuring the conditioning effect, it saves the consumption of chemicals and provides guarantee for subsequent sludge dehydration. In daily operation, except for the replenishment of chemicals, no manual intervention is required, and the operation is simpler and more convenient.

[0044] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A sludge dehydration and dosing conditioning device, characterized in that: include: A sludge storage tank (1), a sludge conditioning tank (3), a sludge dewatering machine (4), a drug-infusing machine (5) and a control system (10), wherein the output end of the sludge storage tank (1) is connected to the input end of the sludge conditioning tank (3), a sludge concentration meter (8) and an electromagnetic flowmeter (9) are arranged between the sludge storage tank (1) and the sludge conditioning tank (3), the output end of the drug-infusing machine (5) is connected to the input end of the sludge conditioning tank (3), a drug-infusing pump (6) and a dilution device (7) are arranged between the drug-infusing machine (5) and the sludge conditioning tank (3), a sampling pump (12) is arranged on the sludge conditioning tank (3), the output end of the sludge conditioning tank (3) is connected to the input end of the sludge dewatering machine (4), and the control system (10) is electrically connected to the drug-infusing pump (6), the sludge concentration meter (8) and the electromagnetic flowmeter (9) respectively.

2. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: A sludge lifting pump (2) is provided between the sludge storage tank (1) and the sludge conditioning tank (3), and the sludge storage tank (1) transfers sludge to the sludge conditioning tank (3) through the sludge lifting pump (2).

3. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The sludge storage tank (1) is connected to the sludge conditioning tank (3) via a sludge conveying pipeline, and the sludge inlet of the sludge conditioning tank (3) is arranged in the middle or lower part of the sludge conditioning tank (3).

4. The sludge dehydration and dosing conditioning device according to claim 3, characterized in that: The sludge concentration meter (8) and the electromagnetic flow meter (9) are both arranged inside the sludge conveying pipeline.

5. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The dilution device (7) is connected to the sludge conditioning tank (3) via a pipeline, and the drug inlet of the sludge conditioning tank (3) is arranged in the middle or upper part of the sludge conditioning tank (3).

6. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The concentration of the flocculant input into the sludge conditioning tank (3) is below 0.3%.

7. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The sludge conditioning tank (3) is provided with an agitator inside, and the rotation speed of the agitator is 25-45 rpm / min.

8. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The sampling pump (12) is connected to the sludge conditioning tank (3) via a water suction pipeline, and the sample outlet of the sludge conditioning tank (3) is arranged in the middle of the sludge conditioning tank (3).

9. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: An image observer (11) is provided on the water suction pipeline of the sampling pump (12), and the control system (10) is electrically connected to the image observer (11).

10. The sludge dehydration and dosing conditioning device according to claim 1, characterized in that: The sludge conditioning tank (3) is connected to the sludge dewatering machine (4) via a sludge discharge pipeline, and the sludge discharge port of the sludge conditioning tank (3) is arranged at the lower part of the sludge conditioning tank (3).

Images