Sludge dewatering machine and sludge storage tank comprising same

Abstract

The utility model discloses a sludge dewatering machine and a sludge storage tank comprising the sludge dewatering machine, the sludge dewatering machine comprises the sludge storage tank and a stacked screw sludge dewatering machine for performing spiral extrusion dewatering on sludge in the sludge storage tank, the inlet end of the stacked screw sludge dewatering machine is connected with a sludge feeding screw pump, and the inlet end of the stacked screw sludge dewatering machine is connected with a sludge discharging screw pump. The discharged wet sludge is lifted and conveyed to the wet sludge bin by using the discharging scraper elevator to be stored and reserved for drying treatment, the dehydrated wet sludge does not need to be directly discharged to cause sludge containing sewage to permeate underground to cause pollution to underground water and soil, and then the sludge is dried by using a low-temperature drying machine from a sludge outlet of the wet sludge bin; the water in the wet sludge is further dried and dewatered, so that the discharged sludge does not contain water, the wet sludge is stored for drying and dewatering treatment after dewatering treatment, the wet sludge is dried and discharged, the environment is not polluted, and the quality and efficiency of sludge dewatering and drying treatment are further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, and particularly relates to a sludge dehydrator and a sludge storage tank containing the same. Background Art

[0002] Village and town sewage is often treated by decentralized sewage treatment stations for domestic sewage. After a period of operation of small decentralized sewage treatment facilities in rural and remote areas, a small amount of sludge and sediment will be generated, which needs to be treated in time, otherwise it will affect the water quality and the normal operation of the equipment. Generally, small decentralized sewage treatment facilities generally do not have the function of sludge reduction and dehydration. For sludge reduction and dehydration treatment, at present, small and medium-sized sewage treatment stations build small sludge treatment stations on-site for sludge dehydration. Existing sludge dehydration equipment is mostly fixed, often configured with sewage treatment facilities, and requires professional technicians during commissioning and normal operation. The sludge treatment device system is complex and the construction cost is high; the operation is complex and the operation cost is high. Due to the small amount of sludge produced, it is not convenient for small sewage treatment stations to use fixed sludge dehydration equipment, and mobile vehicle-mounted sludge dehydration equipment can be used.

[0003] Therefore, a movable sludge dehydration machine room with the publication number of "CN215559797U" relates to the technical field of sewage treatment; the dehydration machine room is of a container type and highly integrates the complete sets of equipment required for sludge dehydration, including a sludge screw conveyor pump, a sludge dehydrator and a chemical dosing device. It is convenient for transportation and can be installed on-site without a concrete foundation, and can quickly and conveniently realize sludge dehydration treatment; it can use the power supply provided by the sewage treatment facility and is no longer restricted by the application for temporary power. The dehydrator performs sludge dehydration operation on-site and returns the leachate to the sewage treatment facility, omitting the journey to the sewage treatment plant. It can also realize the automatic operation of the dehydration system through an automatic control system.

[0004] However, for the above-mentioned movable sludge dehydration machine room, although cationic polyacrylamide solution and sludge carry out a flocculation reaction in the reactor to generate flocs, the flocs enter the spiral press dehydrator for dehydration, and the dehydrated sludge cake is discharged from the spiral press dehydrator along the sludge outlet. There are still the following obvious defects in the use process: the sludge discharged after the spiral press dehydrator dehydrates the sludge has a certain humidity, and since the above-mentioned dehydration device does not have a component for storing and treating the dehydrated sludge and directly discharges it to the outside, it is impossible to effectively store or transport and transfer the dehydrated sludge by vehicle, so it will still cause pollution to the environment and land. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sludge dehydrator and a sludge storage tank containing the same to solve the problems raised in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A sludge dewatering machine, comprising a sludge storage tank, and a stacked screw sludge dewatering machine for screw extrusion dewatering of sludge in the sludge storage tank. A sludge feeding screw pump for conveying the sludge spiral conveyor belt into the stacked screw sludge dewatering machine is connected to the inlet end of the stacked screw sludge dewatering machine. The sludge feeding screw pump is arranged inside the sludge storage tank for pumping and conveying. A chemical dosing screw pump for adding a polymer flocculant into the stacked screw sludge dewatering machine for mixing and entering is connected to the sludge inlet of the stacked screw sludge dewatering machine. The inlet of the chemical dosing screw pump is connected to a preparation and storage tank for preparing and storing the polymer flocculant. A discharge scraper elevator for lifting and extruding the dewatered sludge is connected to one side of the stacked screw sludge dewatering machine. A wet sludge bin for storing the extruded and dewatered sludge is connected to one side of the stacked screw sludge dewatering machine.

[0007] Preferably, a screw conveyor A for spirally discharging the wet sludge is connected to the sludge discharge end of the wet sludge bin, which can synchronously add the sludge and the chemical agent in the sludge storage tank into the stacked screw sludge dewatering machine, reducing the phenomenon of sludge blockage in the equipment.

[0008] Preferably, a low-temperature dryer for low-temperature drying treatment of the wet sludge is connected to the discharge end of the screw conveyor A, realizing the drying treatment of the dewatered sludge by the low-temperature dryer, and reducing the seepage of the wet sludge into the ground to cause pollution.

[0009] Preferably, a screw conveyor B for outputting the low-temperature dried sludge to a sludge transport vehicle is connected to the discharge port of the low-temperature dryer, which can output the dried sludge and transport it to the place where it is needed and the location of the treatment equipment by the transport vehicle.

[0010] Preferably, a chemical dosing pipeline is connected to the output end of the chemical dosing screw pump. The other end of the chemical dosing pipeline is connected to the sludge inlet of the stacked screw sludge dewatering machine, and a chemical dosing electromagnetic flowmeter is installed on the chemical dosing pipeline, which can effectively control the chemical dosing flow rate during the process of adding the chemical agent to the sludge.

[0011] Preferably, a sludge suction pipe extending into the interior of the sludge storage tank is connected to the sludge inlet of the sludge feeding screw pump. A mud inlet electromagnetic flowmeter for monitoring the flow rate of the conveyed sludge is connected to the sludge suction pipe, which can control the amount of sludge input into the stacked screw sludge dewatering machine, avoiding the phenomenon of equipment failure caused by overload operation.

[0012] In addition, to achieve the above object, the present utility model also provides a sludge storage tank, which includes the above-mentioned sludge dewatering machine.

[0013] Compared with the prior art, the technical effects and advantages of the present utility model are as follows: for the sludge dehydrator and the sludge storage tank containing the same, through the combined use of the spiral sludge dehydrator, sludge feeding screw pump, discharging scraper elevator, wet sludge bin and low-temperature dryer in the sludge storage tank, after the spiral sludge dehydrator dehydrates and separates the sludge, the discharged wet sludge can be lifted and transported to the wet sludge bin by the discharging scraper elevator for storage and reserved for drying treatment, without directly discharging the dehydrated wet sludge, which may cause the sludge containing sewage to seep into the ground and pollute the groundwater and soil. Then, the wet sludge is dried by the low-temperature dryer at the sludge outlet of the wet sludge bin, so that the moisture in the wet sludge is further dried and dehydrated, so that the discharged sludge does not contain moisture, and further realizes the drying and dehydration treatment of the wet sludge after dehydration treatment, making the wet sludge become relatively dry and discharged without polluting the environment, and further improving the quality and efficiency of sludge dehydration and drying treatment. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present utility model.

[0015] In the figure: 1. Sludge storage tank; 2. Spiral sludge dehydrator; 3. Sludge feeding screw pump; 4. Chemical dosing screw pump; 5. Preparation storage tank; 6. Discharging scraper elevator; 7. Screw conveyor A; 8. Low-temperature dryer; 9. Screw conveyor B; 10. Chemical dosing pipeline; 11. Chemical dosing electromagnetic flowmeter; 12. Sludge suction pipe; 13. Inlet sludge electromagnetic flowmeter; 14. Wet sludge bin. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1, the present utility model provides a technical solution: a sludge dewatering machine, including a sludge storage tank 1, which is equipped with a large-diameter aeration and stirring device inside, and has the function of aerobic digestion and reduction. Aeration and oxygenation can be carried out in the sludge storage tank 1 to continue the aerobic biochemical action, decompose a part of the organic matter, achieve the effect of sludge reduction. At the same time, due to the aerobic biochemical action, the biochemical sludge itself generates a certain degree of flocculation, which can save the dosage of polymer flocculant during subsequent dewatering, and a spiral screw sludge dewatering machine 2 for spiral extrusion dewatering of sludge in the sludge storage tank 1. The sludge dewatering machine operates continuously and is composed of a chemical dosing and flocculation reaction tank and a spiral extrusion dewatering cavity. And there is a sludge stirring rod for reacting and stirring the sludge in the chemical dosing and flocculation reaction tank. The extrusion dewatering cavity is composed of a moving ring, a static ring, a central spiral body, an outlet adjusting pressing plate, a driving speed reducer, and an electric control system.

[0018] The inlet end of the spiral screw sludge dewatering machine 2 is connected with a sludge feeding screw pump 3 that conveys the sludge to the spiral screw sludge dewatering machine 2 through a sludge conveyor belt, which can reduce the occurrence of blockage during sludge transportation. The sludge feeding screw pump 3 is arranged inside the sludge storage tank 1 for pumping and conveying. The sludge inlet of the spiral screw sludge dewatering machine 2 is connected with a chemical dosing screw pump 4 that adds polymer flocculation agent into the spiral screw sludge dewatering machine 2 for mixing and entering, and accurately adds it during the sludge treatment process. These chemical agents can help with sludge dewatering, solid-liquid separation, deodorization, etc., thereby improving the treatment efficiency and quality. The chemical dosing screw pump 4 usually has precise flow control and chemical agent dosing rate, and can be adjusted according to the treatment process requirements and real-time sludge characteristics. This precise control can ensure the stability and uniformity of chemical agent dosing, avoid overdosage or underdosage, and thus improve the sludge treatment effect. The inlet of the chemical dosing screw pump 4 is connected with a preparation and storage tank 5 for preparing and storing the polymer flocculation agent. By providing an efficient and precise flocculant solution in sludge treatment, it promotes the solid-liquid separation and dewatering process of sludge. By providing an efficient and precise flocculant solution in sludge treatment, it promotes the solid-liquid separation and dewatering process of sludge.

[0019] On one side of the spiral sludge dewatering machine 2, there is a discharge scraper elevator 6 for lifting and squeezing the dewatered sludge. The sludge enters the elevator through the feed inlet and is then pushed by the scraper or chain and moves upward along the inclined plane or vertical track of the elevator. These scrapers or chains convey the sludge from the feed inlet to the discharge outlet through circular motion. The discharge scraper elevator 6 generally consists of an elevator body, a scraper (or chain), a motor, a transmission device, a feed inlet, a discharge outlet, etc. The sludge is input into the elevator through the feed inlet, and the scraper or chain starts to move driven by the motor. The scraper or chain continuously pushes the sludge from the feed inlet towards the discharge outlet and rises along the track or inclined plane of the elevator. On one side of the spiral sludge dewatering machine 2, there is a wet sludge bin 14 for storing the squeezed and dewatered sludge, which can stably store the sludge and avoid the problems of sludging and volatilization in open stacking or other environments. This helps to maintain the original characteristics and treated quality of the sludge, and helps to reduce the volume of the sludge. Through the processes of concentration and natural dewatering, the transportation and disposal costs are reduced. This is because during the storage process, part of the water will naturally evaporate or penetrate, increasing the solid content of the sludge. After a period of natural dewatering of the sludge in the wet sludge bin 14, its water content decreases, making it more suitable for further mechanical dewatering, pressure filtration, and drying.

[0020] The sludge discharge end of the wet sludge bin 14 is connected to a screw conveyor A7 for spirally discharging the wet sludge. The discharge end of the screw conveyor A7 is connected to a low-temperature dryer 8 for low-temperature drying treatment of the wet sludge. Through the heating system and air flow, the low-temperature dryer 8 can provide appropriate heat to accelerate the evaporation and volatilization of the water in the sludge, thus achieving the drying effect. During the drying process, a relatively low temperature is maintained to avoid the problems of excessive decomposition of organic substances in the sludge or the generation of coke. Compared with traditional high-temperature drying or incineration technologies, the low-temperature dryer 8 can save energy and reduce carbon emissions and the release of other pollutants. The discharge port of the low-temperature dryer 8 is connected to a screw conveyor B9 for outputting the low-temperature dried sludge to a sludge transport vehicle, which can discharge the dried and dewatered sludge.

[0021] The output end of the chemical dosing screw pump 4 is connected to a chemical dosing pipeline 10. The other end of the chemical dosing pipeline 10 is connected to the sludge inlet of the spiral sludge dewatering machine 2, and a chemical dosing electromagnetic flowmeter 11 is installed on the chemical dosing pipeline 10. The sludge inlet of the sludge feed screw pump 3 is connected to a sludge suction pipe 12 extending into the sludge storage tank 1, and an inlet sludge electromagnetic flowmeter 13 for monitoring the flow rate of the transported sludge is connected to the sludge suction pipe 12.

[0022] In addition, to achieve the above object, the present utility model also provides a sludge storage tank, which includes the above-mentioned sludge dewatering machine.

[0023] Specifically, during use, the biochemical sludge discharged from the sewage biochemical treatment system first enters the sludge storage tank 1 for storage. The sludge storage tank 1 is equipped with a large-pore aeration and agitation system, which has the function of aerobic digestion and reduction. Aeration and oxygenation can be carried out in the sludge storage tank 1 to continue the aerobic biochemical process, decompose part of the organic matter, and achieve the effect of sludge reduction. At the same time, due to the aerobic biochemical process, the biochemical sludge itself generates a certain degree of flocculability, which can save the dosage of polymer flocculants during subsequent dehydration.

[0024] The sludge after aerobic digestion and reduction is sent to the spiral sludge dewatering machine 2 by the sludge feeding screw pump 3 for dewatering. While the sludge dewatering machine is operating, the polymer flocculant prepared by the preparation and storage tank 5 is synchronously transported to the spiral sludge dewatering machine 2 by the dosing screw pump 4. After the polymer flocculant is synchronously added to the mud inlet of the spiral sludge dewatering machine 2, the spiral sludge dewatering machine 2 operates in a continuous working mode and consists of a dosing and flocculation reaction tank and a spiral extrusion dewatering cavity. The sludge first enters the dosing and flocculation reaction tank contained in the spiral sludge dewatering machine 2 by the sludge feeding screw pump 3, where the polymer flocculant is added and fully stirred and reacted. The sludge flocculates in the mud and water to form a firm blocky floc, and then enters the spiral extrusion dewatering cavity for extrusion dewatering. The extrusion dewatering cavity consists of a moving ring, a static ring, a central spiral body, an outlet adjusting pressing plate, a driving reduction gear, and an electric control system. The spiral extrusion dewatering cavity is arranged obliquely. The sludge floc enters from the lower end, is lifted and extruded by the central spiral body, and the water is extruded from the gaps between the ring pieces of the moving ring and the static ring, and the dry mud is extruded from the gap between the upper outlet adjusting pressing plate and the outlet. The discharging scraper elevator 6 receives the sludge from the mud outlet of the spiral dewatering machine or the belt filter press, and after lifting to a certain height, it falls into the wet sludge storage bin 14 for storage. When the sludge in the wet sludge storage bin 14 is stored to a certain height, the outlet knife gate valve is opened, and the screw conveyor A7 is started to send the sludge to the sludge transport vehicle or the low-temperature dryer 8. The sludge has a high moisture content and high viscosity, and will cause wall hanging and arching phenomena. Although the outlet knife gate valve of the wet sludge storage bin 14 is opened, once the wall hanging and arching phenomena occur, the sludge discharge volume at the outlet of the wet sludge storage bin 14 will be affected or no sludge will be discharged. At this time, the internal special arch-breaking device can be opened to eliminate the wall hanging and arching of the wet sludge, and the outlet sludge discharge volume will not be affected.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sludge dewatering machine, comprising a sludge storage tank (1) and a screw stacking sludge dewatering machine (2) for performing screw extrusion dewatering on the sludge in the sludge storage tank (1), characterized in that: The inlet end of the spiral stack sludge dewatering machine (2) is connected to a sludge feeding screw pump (3) for conveying the sludge spirally into the spiral stack sludge dewatering machine (2); the sludge feeding screw pump (3) is arranged inside the sludge storage tank (1) for extracting and conveying; the sludge inlet of the spiral stack sludge dewatering machine (2) is connected to a dosing screw pump (4) for adding a polymer flocculant into the spiral stack sludge dewatering machine (2) for mixing; the feed port of the dosing screw pump (4) is connected to a preparation storage box (5) for preparing and storing the polymer flocculant; one side of the spiral stack sludge dewatering machine (2) is connected to a discharge scraper elevator (6) for lifting and squeezing the dewatered sludge; and one side of the spiral stack sludge dewatering machine (2) is connected to a wet sludge silo (14) for storing the squeezed dewatered sludge.

2. A sludge dewatering machine according to claim 1, characterized in that: The sludge discharge end of the wet sludge silo (14) is connected to a screw conveyor A (7) for spirally discharging the wet sludge.

3. A sludge dewatering machine according to claim 2, characterized in that: The discharge end of the screw conveyor A (7) is connected to a low-temperature drying machine (8) for performing low-temperature drying treatment on the wet sludge.

4. A sludge dewatering machine according to claim 3, characterized in that: The discharge port of the low-temperature dryer (8) is connected to a screw conveyor B (9) for discharging the low-temperature dried sludge to a sludge transport vehicle.

5. A sludge dewatering machine according to claim 1, characterized in that: The output end of the dosing screw pump (4) is connected to a dosing pipeline (10), the other end of the dosing pipeline (10) is connected to the sludge inlet of the screw stack sludge dewatering machine (2), and a dosing electromagnetic flowmeter (11) is installed on the dosing pipeline.

6. A sludge dewatering machine according to claim 1, characterized in that: The sludge inlet of the sludge feeding screw pump (3) is connected to a sludge suction pipe (12) extending into the interior of the sludge storage tank (1), and the sludge suction pipe (12) is connected to a sludge feeding electromagnetic flowmeter (13) for monitoring the flow of transported sludge.

7. A mud storage tank, characterized in that: The sludge storage tank comprises the sludge dewatering machine described in any one of claims 1-6.

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