A method for concentrating and dehydrating sludge

Abstract

The present invention relates to the technical field of sludge dewatering, and specifically to a sludge concentrating and dewatering method, the method using the following device, the device comprising a dewatering tank, a feed port is provided in the upper end of the dewatering tank, a feeding and dewatering mechanism is provided on the upper side of the feed port, the feeding and dewatering mechanism is fixedly connected to the dewatering tank, the sludge is transported through the feeding and dewatering mechanism, the annular drying tank is connected to the guide groove, a conveying mechanism is provided in the guide groove, the sludge is guided through the guide groove, and the sludge in the guide groove is transported to the annular drying tank through the conveying mechanism; the sludge is guided to the surface of the conveying and dewatering mechanism for preliminary dewatering treatment, the sludge after preliminary dehydration enters the dewatering tank, is scraped off by a scraper and discharged into the external environment, so that the water in the sludge is completely concentrated and dehydrated, and the problem of blockage of holes caused by squeezing and draining the sludge through a water pressure plate is solved.

Description

[0001] This application is a divisional application of application number 2024107155219, application date June 4, 2024, and invention name “A sludge concentration and dehydration device”. Technical Field

[0002] The invention relates to the technical field of sludge dehydration, in particular to a sludge concentration and dehydration method. Background Art

[0003] Sludge treatment is the process of reducing, stabilizing and harmlessly treating sludge, and sludge concentration and dehydration is an important process step that is widely used in sludge treatment. Generally, the water content of sludge is high, and it needs to be concentrated and dehydrated by flocculants or dehydrating agents before mechanical dehydration; such as the Chinese patent with announcement number CN219194788U, which discloses a sludge concentration and dehydration device, including a treatment tank and a water pressure mechanism, wherein the interior of the treatment tank is movably connected to the water pressure mechanism; the treatment tank includes a heating layer, a heat conduction plate and a steam interface, a steam interface is provided above the outer side of the heating layer, a heat conduction plate is provided inside the heating layer, and the water pressure mechanism includes a hydraulic cylinder, a push rod and a water pressure orifice plate.

[0004] However, the above scheme has the following shortcomings: in the above patent, the water pressure plate is used to squeeze the sludge entering the tank body through the hydraulic cylinder to separate the sludge and water, and the surface of the tank body is heated by steam to dry the sludge. However, after the sludge is initially dehydrated, there is still a small amount of moisture in it. At this time, part of the sludge will stick to the surface of the water pressure plate, blocking the holes in the water pressure plate for drainage. When the tank body is heated, part of the sludge stuck to the surface of the water pressure plate will be dried. When a large amount of sludge is dried on the surface of the water pressure plate, when the water pressure plate squeezes the sludge again, the squeezed water cannot pass through the holes and be discharged through the discharge hole, and the sludge cannot be completely dehydrated. For this reason, we have introduced a sludge concentration and dehydration method. Summary of the invention

[0005] The object of the present invention is to provide a sludge concentration and dehydration method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A sludge concentration and dehydration method, the method uses the following device, the device comprises a dehydration tank, a feed port is provided in the upper end of the dehydration tank, a feeding and dehydration mechanism is provided on the upper side of the feed port, the feeding and dehydration mechanism is fixedly connected to the dehydration tank, the sludge is transported by the feeding and dehydration mechanism, and the water in the sewage is separated during the transportation, a connecting seat is movably connected in the dehydration tank, a storage cavity is provided in the upper end of the connecting seat, the sludge is dehydrated by the feeding and dehydration mechanism and then transported to the feed port, the sludge entering the feed port is stored in the storage cavity, a guide groove is provided in the lower end of the storage cavity, an annular drying groove is provided on the outer side of the connecting seat, the annular drying groove is connected to the guide groove, a conveying mechanism is provided in the guide groove, the sludge is guided by the guide groove, and the sludge in the guide groove is transported to the annular drying groove by the conveying mechanism;

[0008] The dewatering tank is provided with a drying mechanism, which is connected to the steam box. The steam generated in the steam box enters the drying mechanism, so that the drying mechanism heats the inner wall of the dewatering tank, and then dries and sterilizes the sludge in the annular drying tank. A discharge cavity is provided in the lower end of the connecting seat, and the discharge cavity is connected to the annular drying tank. A scraper is fixedly connected in the discharge cavity, and the scraper contacts the inner side of the dewatering tank. Two groups of discharge holes are provided in the lower end of the dewatering tank, and the dried sludge is scraped into the discharge cavity by the scraper, and the sludge entered into the discharge cavity is discharged through the discharge holes.

[0009] Preferably, the feeding and dewatering mechanism comprises two groups of support plates, the lower ends of the two groups of support plates are fixedly connected to the upper end of the dewatering tank, the lower ends of the two groups of support plates are fixedly connected to the support columns, two groups of transmission rollers are movably connected between the two groups of support plates, two groups of blocking soft plates are sleeved on the outer sides of the two groups of transmission rollers, a permeable filter cloth is fixedly connected between the two groups of blocking soft plates, a pressure roller is provided on the upper side of the permeable filter cloth, the pressure roller is movably connected between the two groups of support plates, a connecting motor is fixedly connected to one side of one group of support plates, and the output end of the connecting motor is fixedly connected to a group of transmission rollers.

[0010] Preferably, the drying mechanism includes an annular heat-conducting copper plate, which is fixedly installed on the inner side of the dehydration tank, the annular heat-conducting copper plate corresponds to the position of the annular drying groove, a heat-conducting pipe is sleeved on the outer side of the annular heat-conducting copper plate, and the heat-conducting pipe is fixedly installed in the dehydration tank.

[0011] Preferably, the input end of the heat pipe extends out of the dehydration tank and is fixedly connected to a first one-way valve, the first one-way valve is fixedly installed on the upper end of the steam box, the output end of the heat pipe extends out of the dehydration tank and is fixedly connected to a second one-way valve, the second one-way valve is fixedly installed on the outside of the dehydration tank, and a heating plate is fixedly installed on the inner bottom of the steam box.

[0012] Preferably, a transmission motor is fixedly mounted at the lower end of the dehydration tank, and an output end of the transmission motor extends into the dehydration tank and is fixedly connected to a connecting seat.

[0013] Preferably, the conveying mechanism comprises a screw conveying rod, the screw conveying rod is movably connected in the guide groove, one end of the screw conveying rod is fixedly connected to the first motor, and the first motor is fixedly installed in the connecting seat.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by guiding the sludge to the surface of the conveying and dehydrating mechanism for preliminary dehydration treatment, the sludge after preliminary dehydration enters the dehydration tank and is stored in the storage cavity, and the steam in the steam box enters the drying mechanism to heat the inner wall of the dehydration tank, and when the conveying mechanism conveys the sludge in the storage cavity to the annular drying trough, the drying mechanism dries and sterilizes the sludge in the annular drying trough, and after the dried sludge moves to the position of the discharge cavity, it is scraped off by a scraper and discharged into the external environment, so that the moisture in the sludge is completely concentrated and dehydrated, thereby solving the problem of blockage of the holes caused by squeezing and draining the sludge through the water pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting seat of the present invention;

[0018] Figure 4 This is a cross-sectional structural schematic diagram of the connection relationship between the discharge chamber and the annular drying tank of the present invention;

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the connecting seat of the present invention.

[0020] In the figure: 1. dehydration tank; 2. storage chamber; 3. spiral conveying rod; 4. annular drying tank; 5. heat conduction pipe; 6. discharge hole; 7. transmission motor; 8. guide groove; 9. first motor; 10. connecting seat; 11. annular heat conduction copper plate; 12. second one-way valve; 13. first one-way valve; 14. steam box; 15. heating plate; 16. feed port; 17. support plate; 18. pressing roller; 19. blocking soft plate; 20. transmission roller; 21. support column; 22. water-permeable filter cloth; 23. connecting motor; 24. scraper; 25. discharge chamber. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5 , the present invention provides a technical solution: Embodiment 1:

[0023] A sludge concentration and dehydration method, the method uses the following device, the device comprises a dehydration tank 1, a feed port 16 is provided in the upper end of the dehydration tank 1, a feeding and dehydration mechanism is provided on the upper side of the feed port 16, the feeding and dehydration mechanism is fixedly connected to the dehydration tank 1, the sludge is transported by the feeding and dehydration mechanism, and the water in the sewage is separated during the transportation, a connecting seat 10 is movably connected in the dehydration tank 1, a storage chamber 2 is provided in the upper end of the connecting seat 10, the sludge is dehydrated by the feeding and dehydration mechanism and then transported to the feed port 16, the sludge entering the feed port 16 is stored in the storage chamber 2, a guide groove 8 is provided in the lower end of the storage chamber 2, an annular drying groove 4 is provided on the outer side of the connecting seat 10, the annular drying groove 4 is connected to the guide groove 8, a conveying mechanism is provided in the guide groove 8, the sludge is guided by the guide groove 8, and the sludge in the guide groove 8 is transported to the annular drying groove 4 by the conveying mechanism;

[0024] A drying mechanism is provided in the dewatering tank 1, and the drying mechanism is connected to the steam box 14. The steam generated in the steam box 14 enters the drying mechanism, so that the drying mechanism heats the inner wall of the dewatering tank 1, and then dries and sterilizes the sludge in the annular drying tank 4. A discharge chamber 25 is provided in the lower end of the connecting seat 10, and the discharge chamber 25 is connected to the annular drying tank 4. A scraper 24 is fixedly connected in the discharge chamber 25, and the scraper 24 contacts the inner side of the dewatering tank 1. Two groups of discharge holes 6 are provided in the lower end of the dewatering tank 1. As the connecting seat 10 rotates continuously, when the discharge chamber 25 moves to the position of the dried sludge, the dried sludge can be discharged into the external environment through the discharge hole 6 after falling off. The dried sludge is scraped into the discharge chamber 25 by the scraper 24, and the sludge entering the discharge chamber 25 is discharged through the discharge hole 6. Embodiment 2:

[0025] On the basis of Example 1, in order to allow the sludge to be initially dehydrated before entering the dehydration tank 1 for concentration and dehydration, the feeding and dehydration mechanism includes two groups of support plates 17, the lower ends of the two groups of support plates 17 are fixedly connected to the upper end of the dehydration tank 1, and the lower ends of the two groups of support plates 17 are fixedly connected to the support columns 21. Two groups of driving rollers 20 are movably connected between the two groups of support plates 17, and two groups of blocking soft plates 19 are sleeved on the outer sides of the two groups of driving rollers 20. A permeable filter cloth 22 is fixedly connected between the two groups of blocking soft plates 19. The two groups of blocking soft plates 19 can limit the sludge so that the sludge can always be on the surface of the permeable filter cloth 22. A pressing roller is provided on the upper side of the permeable filter cloth 22. 18, the pressing roller 18 is movably connected between the two groups of support plates 17, one side of a group of support plates 17 is fixedly connected with a connecting motor 23, the output end of the connecting motor 23 is fixedly connected to a group of driving rollers 20, the connecting motor 23 is turned on to drive the driving rollers 20 connected to its output end to start rotating, the driving rollers 20 rotate and drive the two groups of blocking soft plates 19 and the water-permeable filter cloth 22 to start rotating, and guide the sludge to the upper end of the water-permeable filter cloth 22, the moisture in the sludge can be discharged into the external environment through the water-permeable filter cloth 22, when the sludge on the surface of the water-permeable filter cloth 22 moves to the position of the pressing roller 18, the sludge will be squeezed by the pressing roller 18, so that the moisture in the sludge is squeezed out;

[0026] The drying mechanism includes an annular heat-conducting copper plate 11, which is fixedly installed on the inner side of the dehydration tank 1, and the annular heat-conducting copper plate 11 corresponds to the position of the annular drying tank 4. A heat-conducting pipe 5 is sleeved on the outer side of the annular heat-conducting copper plate 11, and the heat-conducting pipe 5 is fixedly installed in the dehydration tank 1. The input end of the heat-conducting pipe 5 extends out of the dehydration tank 1 and is fixedly connected to the first one-way valve 13, and the first one-way valve 13 is fixedly installed on the upper end of the steam box 14. The output end of the heat-conducting pipe 5 extends out of the dehydration tank 1 and is fixedly connected to the second one-way valve 12, and the second one-way valve 12 is fixedly installed. A heating plate 15 is fixedly installed on the bottom of the inner side of the steam box 14 outside the dehydration tank 1. After the heating plate 15 is started, it heats the water source in the steam box 14. The steam generated by the heating will enter the heat pipe 5 through the first one-way valve 13, and will not enter the second one-way valve 12. The steam moves along the heat pipe 5 to heat it. After the heat pipe 5 is heated, the heat is transferred to the annular heat-conducting copper plate 11. The steam passing through the heat pipe 5 will be cooled and finally returned to the steam box 14 through the second one-way valve 12.

[0027] A transmission motor 7 is fixedly installed at the lower end of the dehydration tank 1. The output end of the transmission motor 7 extends into the dehydration tank 1 and is fixedly connected to the connecting seat 10. By turning on the transmission motor 7, the connecting seat 10 can be driven to start rotating. The conveying mechanism includes a spiral conveying rod 3. The spiral conveying rod 3 is movably connected to the guide groove 8. One end of the spiral conveying rod 3 is fixedly connected to the first motor 9. The first motor 9 is fixedly installed in the connecting seat 10. By turning on the first motor 9, the spiral conveying rod 3 can be driven to start rotating. The rotating spiral conveying rod 3 conveys the sludge in the storage chamber 2 to the annular drying tank 4.

[0028] Working principle: when in use, turn on the connection motor 23 to drive the transmission roller 20 connected to its output end to start rotating. The rotation of the transmission roller 20 drives the two sets of blocking soft plates 19 and the water-permeable filter cloth 22 to start rotating, and guide the sludge to the upper end of the water-permeable filter cloth 22. The moisture in the sludge can be discharged into the external environment through the water-permeable filter cloth 22. When the sludge on the surface of the water-permeable filter cloth 22 moves to the position of the pressing roller 18, the sludge will be squeezed by the pressing roller 18, so that the moisture in the sludge is squeezed out. The sludge squeezed by the pressing roller 18 will enter the dehydration tank 1 through the feed port 16 during transmission, and fall into the storage chamber 2.

[0029] Turn on the transmission motor 7, the first motor 9 and the heating plate 15. The transmission motor 7 rotates to drive the connecting seat 10 to start rotating. The first motor 9 rotates to drive the spiral conveying rod 3 to start rotating. After the heating plate 15 is started, it heats the water source in the steam box 14. The steam generated by the heating will enter the heat pipe 5 through the first one-way valve 13, but will not enter the second one-way valve 12. The steam moves along the heat pipe 5 to heat it. After the heat pipe 5 is heated, the heat is transferred to the annular heat-conducting copper plate 11. The steam passing through the heat pipe 5 will be cooled and finally returned to the steam box 14 through the second one-way valve 12.

[0030] When the spiral conveying rod 3 rotates, the sludge in the storage chamber 2 is transported to the annular drying tank 4. The connecting seat 10 rotates so that the sludge is evenly distributed in the annular drying tank 4. The sludge is between the annular drying tank 4 and the annular heat-conducting copper plate 11. The sludge in the annular drying tank 4 is dried and sterilized by the heated annular heat-conducting copper plate 11 to concentrate the water in the sludge. As the connecting seat 10 continues to rotate, when the discharge chamber 25 moves to the position of the dried sludge, the dried sludge can be discharged into the external environment through the discharge hole 6 after falling off. At the same time, the scraper 24 rotates with the connecting seat 10, and the sludge adhering to the surface of the annular heat-conducting copper plate 11 can be scraped off and discharged into the external environment.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for concentrating and dehydrating sludge, the method using the following device, the device comprising a dehydration tank, characterized in that: A feed port is provided in the upper end of the dewatering tank, a feeding and dewatering mechanism is provided on the upper side of the feed port, the feeding and dewatering mechanism is fixedly connected to the dewatering tank, the sludge is transported through the feeding and dewatering mechanism, and the water in the sewage is separated during the transportation process, a connecting seat is movably connected in the dewatering tank, a storage cavity is provided in the upper end of the connecting seat, the sludge is dehydrated by the feeding and dewatering mechanism and then transported to the feed port, the sludge entering the feed port is stored in the storage cavity, a guide groove is provided in the lower end of the storage cavity, an annular drying groove is provided on the outer side of the connecting seat, the annular drying groove is connected to the guide groove, a conveying mechanism is provided in the guide groove, the sludge is guided by the guide groove, and the sludge in the guide groove is transported to the annular drying groove by the conveying mechanism; The dehydration tank is provided with a drying mechanism, which is connected with the steam box. The steam generated in the steam box enters the drying mechanism, so that the drying mechanism heats the inner wall of the dehydration tank, and then dries and sterilizes the sludge in the annular drying tank. A discharge cavity is provided in the lower end of the connecting seat, and the discharge cavity is connected with the annular drying tank. A scraper is fixedly connected in the discharge cavity, and the scraper contacts the inner side of the dehydration tank. Two groups of discharge holes are provided in the lower end of the dehydration tank, and the dried sludge is scraped into the discharge cavity by the scraper, and the sludge entering the discharge cavity is discharged through the discharge holes. A transmission motor is fixedly installed at the lower end of the dehydration tank, and an output end of the transmission motor extends into the dehydration tank and is fixedly connected to the connecting seat.

2. A sludge concentration and dehydration method according to claim 1, characterized in that: The material conveying and dewatering mechanism includes two groups of support plates, the lower ends of the two groups of support plates are fixedly connected to the upper end of the dewatering tank, the lower ends of the two groups of support plates are fixedly connected to the support columns, two groups of transmission rollers are movably connected between the two groups of support plates, two groups of blocking soft plates are sleeved on the outer sides of the two groups of transmission rollers, a permeable filter cloth is fixedly connected between the two groups of blocking soft plates, a pressing roller is provided on the upper side of the permeable filter cloth, the pressing roller is movably connected between the two groups of support plates, a connecting motor is fixedly connected to one side of one group of support plates, and the output end of the connecting motor is fixedly connected to a group of transmission rollers.

3. A sludge concentration and dehydration method according to claim 1, characterized in that: The drying mechanism includes an annular heat-conducting copper plate, which is fixedly installed on the inner side of the dehydration tank. The annular heat-conducting copper plate corresponds to the position of the annular drying tank. A heat-conducting pipe is sleeved on the outer side of the annular heat-conducting copper plate, and the heat-conducting pipe is fixedly installed in the dehydration tank.

4. A sludge concentration and dehydration method according to claim 3, characterized in that: The input end of the heat-conducting pipe extends out of the dehydration tank and is fixedly connected to the first one-way valve, the first one-way valve is fixedly installed on the upper end of the steam box, the output end of the heat-conducting pipe extends out of the dehydration tank and is fixedly connected to the second one-way valve, the second one-way valve is fixedly installed on the outside of the dehydration tank, and a heating plate is fixedly installed on the bottom inside the steam box.

5. A sludge concentration and dehydration method according to claim 1, characterized in that: The conveying mechanism comprises a screw conveying rod, the screw conveying rod is movably connected in the guide groove, one end of the screw conveying rod is fixedly connected to the first motor, and the first motor is fixedly installed in the connecting seat.

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