Sludge multi-stage extrusion dehydration treatment equipment

Abstract

The invention provides sludge multi-stage extrusion dewatering treatment equipment, which belongs to the technical field of sludge extrusion dewatering treatment, and comprises a first extrusion module, an intermediate treatment module, a second extrusion module and a frame body, the first extrusion module comprises a first extrusion groove; one side of the first extrusion groove is provided with a sludge inlet, and the other side is fixedly provided with a sludge outlet groove; the sludge outlet groove is communicated with the intermediate treatment module; the intermediate processing module is communicated with the second extrusion module; the first extrusion module, the intermediate processing module and the second extrusion module are fixedly mounted on the frame body; the bottom of the first extrusion module is higher than that of the intermediate treatment module; the bottom of the intermediate processing module is higher than that of the second extrusion module.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge extrusion dehydration treatment, and in particular relates to a sludge multi-stage extrusion dehydration treatment device. Background Art

[0002] Oily sludge has a complex composition, containing a large amount of crude oil, as well as a large amount of colloids, asphaltene, benzene, anthracene, phenol, pyrene and other toxic and harmful substances, and even radioactive substances and heavy metals. Therefore, the country attaches great importance to the sludge treatment in the petrochemical industry, and the environmental protection requirements for the treated products are also high. During the storage and transportation of crude oil, the solid particles in the crude oil (such as salt, minerals, rust, etc.) will precipitate over time to form solid sludge sediments; at the same time, during the oil refining process, impurities in crude oil (such as salt, suspended solids, colloids, etc.) will react with water to form colloidal sludge, which usually remain stable in liquid, increasing the complexity of sludge and the difficulty of treatment.

[0003] The following analysis is made for traditional sludge dewatering treatment: Problem 1: Sludge usually contains a high proportion of water, and the adhesion of solid particles and oil makes solid-liquid separation complicated. The mixture of oil and water in sludge often forms a colloidal liquid, which makes it difficult to separate the oil and water by direct squeezing, and the traditional separation method is not effective.

[0004] Question 2: When using roller squeezing to dehydrate sludge, the distance between the upper and lower filter cloths wrapped by the rollers must be small enough to have enough pressure to achieve sufficient sludge dehydration. At this time, solid sludge impurities such as gravel in the sludge will damage the filter cloth due to the strong pressure and the squeezing effect of the rollers. Summary of the invention

[0005] In view of this, the present invention proposes a sludge multi-stage extrusion dehydration treatment device which improves the mixing rate of sludge and reagents by differentiating and dividing the colloidal liquid formed by the oil-water mixture in the sludge, thereby improving the dehydration efficiency.

[0006] The present invention provides a sludge multi-stage extrusion dewatering treatment equipment, which includes a first extrusion module, an intermediate processing module, a second extrusion module and a frame; the first extrusion module includes a first extrusion groove; a mud inlet is opened on one side of the first extrusion groove, and a mud outlet groove is fixedly installed on the other side; the mud outlet groove is connected with the intermediate processing module; the intermediate processing module is connected with the second extrusion module; the first extrusion module, the intermediate processing module and the second extrusion module are all fixedly installed on the frame; the bottom of the first extrusion module is higher than the bottom of the intermediate processing module; the bottom of the intermediate processing module is higher than the bottom of the second extrusion module; pressure sensors and controllers adapted to the sensors are fixedly installed in the first extrusion module and the second extrusion module.

[0007] On the basis of the above technical solution, the sludge multi-stage extrusion dehydration treatment equipment of the present invention can also be improved as follows: Furthermore, the first extrusion module also includes a first hydraulic cylinder, a first pressure plate and a first drawer scraper; the first hydraulic cylinder is fixed separately; the first pressure plate is fixedly installed on the output end of the first hydraulic cylinder; the first pressure plate is slidably sleeved and installed in the first extrusion groove; the first extrusion groove has a groove at the bottom; the first pressure plate is slidably installed in the groove at the bottom of the first extrusion groove; the first drawer scraper is slidably installed inside the first extrusion groove; a filter is plugged and installed on the first drawer scraper; an electric push rod is fixedly installed outside the first extrusion groove; the output end of the electric push rod is fixedly connected to the first drawer scraper.

[0008] The beneficial effects of adopting the above further scheme are: by setting the first drawer scraper, cooperating with the first hydraulic cylinder and the first pressure plate, the colloidal sludge can be segmented and processed to facilitate subsequent stirring and secondary treatment; by setting the first drawer scraper, the remaining larger solid particles can be scraped away from the first extrusion groove to avoid damage to the first pressure plate during the subsequent extrusion and crushing process.

[0009] Furthermore, the intermediate processing module includes a processing barrel, which has an inlet on one side and an outlet on the other side; the inlet is fixedly connected to the outlet of the mud outlet trough; the outlet is fixedly connected to the second extrusion module; a stirring assembly for sufficient stirring is rotatably installed in the processing barrel; a lifting assembly is also fixedly installed outside the processing barrel; the lifting assembly is fixedly connected to the stirring assembly.

[0010] Furthermore, the stirring assembly includes a stirring shaft; one end of the stirring shaft is fixedly connected to the stirring motor through a coupling; a stirring scraper is rotatably installed on the other end of the stirring shaft; a stirring blade is sleeved on the stirring shaft; the outer diameter of the stirring scraper is the same as the inner diameter of the processing barrel.

[0011] The beneficial effects of adopting the above further scheme are: by setting up stirring blades, the sludge attached to the inner wall of the treatment barrel can be scraped off under the action of the lifting component; by setting up stirring blades connected to the stirring shaft through bearings, and the stirring shaft and the bottom of the treatment barrel are connected through bearings, the stirring blades will not rotate with the stirring shaft when it rotates, thereby reducing the resistance of the stirring shaft to rotate in the treatment barrel and reducing the torque at the output end of the stirring motor.

[0012] Furthermore, the lifting assembly includes a first electric push rod, which is installed on the outer shell of the processing barrel; a lifting frame is fixedly installed on the output end of the first electric push rod; and the stirring motor is fixedly installed on the lifting frame.

[0013] Furthermore, the second extrusion module includes a second extrusion groove, a second drawer scraper and a second hydraulic cylinder; the second hydraulic cylinder is fixed separately; a second pressure plate is fixedly installed on the output end of the second hydraulic cylinder; the second pressure plate is slidably sleeved and installed in the second extrusion groove; a sewage inlet is opened on one side of the second extrusion groove; the sewage inlet is connected with the outlet; the bottom of the second drawer scraper is grooved; the second drawer scraper is slidably installed in the groove at the bottom of the second extrusion groove; a blocking net is fixedly installed at the bottom of the second extrusion groove; a filter cloth is fixedly installed at the bottom of the second extrusion groove; a second electric push rod is fixedly installed outside the second extrusion groove; the second electric push rod is fixedly connected to the second drawer scraper.

[0014] Furthermore, the filter cloth is located below the second drawer scraper, and the filter cloth is located above the blocking net.

[0015] The beneficial effect of adopting the above further solution is: by setting a blocking net to drag the filter cloth from below, it is achieved to avoid the high pressure inside the second extrusion tank from damaging the filter cloth during the extrusion dehydration process.

[0016] Furthermore, notches are provided on both sides of the filter screen, a position where the first drawer scraper is mounted with a protrusion matched with the notches, and a stopper for fixing the filter screen is provided at the bottom of the first drawer scraper.

[0017] Furthermore, a sloping plate for removing large solid impurities is provided on one side of the frame body close to the first extrusion module; baffles are provided on both sides of the sloping plate.

[0018] The beneficial effects of adopting the above further solution are: by setting the inclined plate, the collection and processing of large-volume solid particle impurities can be achieved; by setting the baffle, the impurities are prevented from escaping from the side and becoming difficult to collect.

[0019] Furthermore, the mud outlet trough is in the shape of a trapezoidal funnel, the connection with the processing barrel is a round hole, and the connection with the first extrusion trough is a square hole.

[0020] Compared with the prior art, the beneficial effect of the sludge multi-stage extrusion dehydration treatment equipment provided by the present invention is: the present invention can separate a larger volume of solid sludge through preliminary pressing and screening, avoiding damage to the filter cloth caused by subsequent extrusion treatment. At the same time, the colloidal substances in the sludge can be fully divided during the pressurization process, which is convenient for subsequent intermediate treatment, so that the added agent can be better mixed with the sludge during the intermediate treatment, and the separation between oil and water in the sludge can be achieved to the greatest extent. At the same time, by setting the first drawer scraper, the separated rock chips can be removed from the entire operating device to avoid affecting the next treatment process; by setting the second drawer scraper, the pressurized dehydrated mud cake can be separated from the second extrusion module; by combining the sensor with the controller, the pressure during extrusion can be controlled within a certain range, avoiding damage to the equipment due to excessive pressure during sludge extrusion and dehydration, or incomplete sludge dehydration due to insufficient pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure; Figure 2 is a side view of the first extrusion module; Figure 3 is a cross-sectional view of the first extrusion module; Figure 4 This is the axonometric view of the intermediate processing module; Figure 5 It is the front view of the intermediate processing module; Figure 6 It is a cross-sectional view of the middle processing module at AA; Figure 7 is an axonometric view of the second extrusion module; Figure 8 is a side view of the second extrusion module; Fig. 9 This is a cross-sectional view of the second extrusion module along line AA.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 10. First extrusion module; 11. First extrusion trough; 111. Mud inlet; 12. First hydraulic cylinder; 13. First pressing plate; 14. First drawer scraper; 141. Filter; 15. Electric push rod; 16. Mud outlet trough; 20. Intermediate processing module; 21. Processing barrel; 211. Inlet; 212. Outlet; 22. Stirring assembly; 221. Stirring shaft; 222. Stirring blade; 223. Stirring scraper; 224. Stirring motor; 23. Lifting assembly; 231. First electric push rod; 232. Lifting frame; 30. Second extrusion module; 31. Second extrusion slot; 311. Sewage inlet; 32. Second drawer scraper; 33. Second electric push rod; 34. Second hydraulic cylinder; 35. Second pressing plate; 36. Filter cloth; 37. Blocking net; 40. Frame. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] like Figure 1-9 As shown, the present invention provides a sludge multi-stage extrusion dewatering treatment equipment, which includes a first extrusion module 10, an intermediate processing module 20, a second extrusion module 30 and a frame 40; the first extrusion module 10 includes a first extrusion groove 11; a mud inlet 111 connected to a sludge conveying device is opened on one side of the first extrusion groove 11; a mud outlet groove 16 is fixedly installed on the side of the first extrusion groove 11 away from the mud inlet 111; the first extrusion module 10 is connected to the intermediate processing module 20 through the mud outlet groove 16; the intermediate processing module 20 is connected to the second extrusion module 30 through a pipeline; the first extrusion module 10, the intermediate processing module 20 and the second extrusion module 30 are all fixedly installed on the frame 40. The sludge from the petrochemical plant is sent to the first extrusion module 10 through the mud inlet 111 through the sludge conveying equipment. The first extrusion module 10 uses the extrusion action to split and crush the colloid in the sludge, and at the same time removes the large particles of solid impurities in the colloid, and collects and discharges the solid impurities for subsequent reuse. The sludge after crushing and impurity removal enters the intermediate processing module 20, into which water, flocculants, etc. are added to perform secondary treatment on the crushed sludge at the biochemical level to facilitate subsequent dehydration and squeezing.

[0025] Optionally, in the above technical scheme, the first extrusion module 10 also includes a first hydraulic cylinder 12, a first pressure plate 13 and a first drawer scraper 14; the first hydraulic cylinder 12 is additionally fixed; the first pressure plate 13 is fixedly installed on the output end of the first hydraulic cylinder 12; the first extrusion groove 11 is grooved on one side at the bottom; the first pressure plate 13 is slidably installed in the groove at the bottom of the first extrusion groove 11; the first drawer scraper 14 is slidably installed at the bottom inside the first extrusion groove 11; the first drawer scraper 14 is plugged and installed with a filter screen 141 on one side near the mud outlet groove 16 of the first drawer scraper 14; an electric push rod 15 is fixedly installed at a position near the bottom of the outer side of the first extrusion groove 11; the output end of the electric push rod 15 is fixedly connected to the side of the first drawer scraper 14.

[0026] Optionally, in the above technical solution, the intermediate processing module 20 includes a processing barrel 21, and an inlet 211 is opened on one side of the processing barrel 21 near the top; an outlet 212 is opened on the processing barrel 21 away from the inlet 211 near the bottom; the inlet 211 is fixedly connected to the outlet of the mud outlet trough 16; the outlet 212 is fixedly connected to the second extrusion module 30 through a pipeline; a stirring assembly 22 for sufficient stirring is slidably installed in the processing barrel 21; and a lifting assembly 23 for lifting the stirring assembly 22 is also fixedly installed outside the processing barrel 21.

[0027] Optionally, in the above technical scheme, the stirring assembly 22 includes a stirring shaft 221, one end of which is fixedly connected to the stirring motor 224 through a coupling; the other end of the stirring shaft 221 is rotatably mounted with a stirring scraper 223 through a bearing sleeve; the bottom of the stirring scraper 223 is rotatably mounted with a protrusion at the bottom center of the processing barrel 21 through a bearing sleeve; a stirring blade 222 is fixedly mounted on the stirring shaft 221; the stirring blade 222 rotates with the stirring shaft 221; the outer diameter of the stirring scraper 223 is the same as the inner diameter of the processing barrel 21.

[0028] Optionally, in the above technical solution, the lifting assembly 23 includes a first electric push rod 231, which is fixedly mounted on the outer shell of the processing barrel 21 through a connecting plate; a lifting frame 232 is fixedly mounted on the output end of the first electric push rod 231; the lifting frame 232 has two layers, the upper and lower layers, and the stirring motor 224 is fixedly mounted between the upper and lower layers of the lifting frame 232.

[0029] Optionally, in the above technical scheme, the second extrusion module 30 includes a second extrusion groove 31, a second drawer scraper 32 and a second hydraulic cylinder 34; the second hydraulic cylinder 34 is additionally fixed; a second pressure plate 35 is fixedly installed on the output end of the second hydraulic cylinder 34; the second pressure plate 35 is slidably installed in the second extrusion groove 31; a sewage inlet 311 is opened on the side of the second extrusion groove 31 close to the intermediate processing module 20; the sewage inlet 311 is connected with the outlet 212 through a pipe; the bottom of the second drawer scraper 32 is grooved on both sides; the second drawer scraper 32 is slidably installed in the groove at the bottom of the second extrusion groove 31; the bottom of the second extrusion groove 31 is hollowed out, and a blocking net 37 is fixedly installed; a filter cloth 36 is fixedly laid above the blocking net 37; a second electric push rod 33 is fixedly installed near the bottom of the second extrusion groove 31 through a connecting plate; the output end of the second electric push rod 33 is fixedly connected to one end of the second drawer scraper 32.

[0030] Optionally, in the above technical solution, the filter cloth 36 is located below the second drawer scraper 32 , and the filter cloth 36 is located above the blocking net 37 .

[0031] Optionally, in the above technical solution, notches are provided on both sides of the filter 141 , the position where the filter 141 is installed on the first drawer scraper 14 has a protrusion adapted to the notch, and a block for fixing the filter 141 is provided at the bottom of the first drawer scraper 14 .

[0032] Optionally, in the above technical solution, a sloping plate for removing large solid impurities is further provided on one side of the frame 40 close to the first extrusion module 10; baffles are provided on both sides of the sloping plate.

[0033] Optionally, in the above technical solution, the mud outlet trough 16 is in a trapezoidal funnel shape, the connection with the processing barrel 21 is a round hole, and the connection with the first extrusion groove 11 is a square hole.

[0034] Optionally, in the above technical solution, pipeline switches are provided at the connections between the modules.

[0035] Optionally, in the above technical solution, the lower surfaces of the first pressing plate 13 and the second pressing plate 35 are provided with pressure sensors and alarms and controllers used in conjunction with the sensors. When the sludge is squeezed, the pressure sensors are used to ensure the magnitude of the applied pressure to avoid damage to the equipment due to excessive pressure or ineffective squeezing due to too low pressure, resulting in incomplete dehydration. At the same time, the sensors can also be used to control the applied pressure to be maintained within a relatively stable range during the entire squeezing and dehydration process, thereby improving the stability and safety of the overall equipment. If the equipment loses pressure, the alarm can provide feedback and alarm immediately to ensure the safety of the working process.

[0036] When in use, the sludge conveying equipment conveys the sludge to be treated in the sludge pool to the first extrusion groove 11 through the mud inlet 111, and the first hydraulic cylinder 12 is started to push the first pressing plate 13 to move downward to squeeze the sludge. The sludge is divided by the filter screen 141 under pressure and enters the processing barrel 21 through the mud outlet groove 16. In the process of sludge division, a large volume of solid impurities is left in the first drawer scraper 14. At this time, the electric push rod 15 is started to drive the first drawer scraper 14 to move away from the processing barrel 21, and the large volume of solid impurities left in the first drawer scraper 14 are taken away from the first extrusion groove 11. The large volume of solid impurities rolls down along the inclined plate of the frame 40. The divided and broken sludge enters the processing barrel 21. At this time, water, flocculants and other drugs are added to the inside through the top of the processing barrel 21, and the stirring motor 224 is started. The stirring motor 224 drives the stirring shaft 221 and the stirring blades fixed on the stirring shaft 221 to stir the mixture in the processing barrel 21 to make it fully fused. The fused mixture enters the second extrusion groove 31 through the outlet 212, and the second hydraulic cylinder 34 is activated to push the second pressing plate 35 downward to extrude and dehydrate the mixture. The mixture is dehydrated to form a mud cake under the action of the second pressing plate 35, the filter cloth 36 and the blocking net 37. At this time, the second electric push rod 33 is activated to drive the second drawer scraper 32 and take out the formed mud cake together.

[0037] After multiple treatments, a large amount of sludge-containing mixture will adhere to the inner wall of the treatment barrel 21. At this time, the first electric push rod 231 is started to push the lifting frame 232 to raise the stirring assembly 22 as a whole. At this time, the stirring scraper 223 located at the bottom of the treatment barrel 21 rises with the stirring shaft 221 to scrape the mixture on the inner wall of the treatment barrel 21.

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sludge multi-stage extrusion dehydration treatment equipment, characterized in that: The invention comprises a first extrusion module (10), an intermediate processing module (20), a second extrusion module (30) and a frame (40); the first extrusion module (10) comprises a first extrusion groove (11); a mud inlet (111) is provided on one side of the first extrusion groove (11), and a mud outlet groove (16) is fixedly installed on the other side; the mud outlet groove (16) is communicated with the intermediate processing module (20); the intermediate processing module (20) is communicated with the second extrusion module (30); the first extrusion module (10), the intermediate processing module (20) and the second extrusion module (30) are all fixedly installed on the frame (40); The bottom of the first extrusion module (10) is higher than the bottom of the intermediate processing module (20); the bottom of the intermediate processing module (20) is higher than the bottom of the second extrusion module (30); A pressure sensor and a controller adapted to the sensor are fixedly installed in the first extrusion module (10) and the second extrusion module (30).

2. The sludge multi-stage extrusion dehydration treatment equipment according to claim 1 is characterized in that: The first extrusion module (10) further comprises a first hydraulic cylinder (12), a first pressing plate (13) and a first drawer scraper (14); the first hydraulic cylinder (12) is fixed separately; the first pressing plate (13) is fixedly mounted on the output end of the first hydraulic cylinder (12); the first pressing plate (13) is slidably mounted in the first extrusion groove (11); the first extrusion groove (11) has a groove at the bottom; the first pressing plate (13) is slidably mounted in the groove at the bottom of the first extrusion groove (11); the first drawer scraper (14) is slidably mounted inside the first extrusion groove (11); a filter screen (141) is plugged and mounted on the first drawer scraper (14); an electric push rod (15) is fixedly mounted outside the first extrusion groove (11); the output end of the electric push rod (15) is fixedly connected to the first drawer scraper (14).

3. The sludge multi-stage extrusion dehydration treatment equipment according to claim 2 is characterized in that: The intermediate processing module (20) comprises a processing barrel (21), one side of the processing barrel (21) is provided with an inlet (211), and the other side of the processing barrel (21) is provided with an outlet (212); the inlet (211) is fixedly connected to the outlet of the mud outlet trough (16); the outlet (212) is fixedly connected to the second extrusion module (30); a stirring assembly (22) for sufficient stirring is rotatably installed in the processing barrel (21); a lifting assembly (23) is also fixedly installed outside the processing barrel (21); the lifting assembly (23) is fixedly connected to the stirring assembly (22).

4. The sludge multi-stage extrusion dehydration treatment equipment according to claim 3 is characterized in that: The stirring assembly (22) comprises a stirring shaft (221); one end of the stirring shaft (221) is fixedly connected to a stirring motor (224) via a coupling; a stirring scraper (223) is rotatably mounted on the other end of the stirring shaft (221); a stirring blade (222) is sleeved and mounted on the stirring shaft (221); the outer diameter of the stirring scraper (223) is the same as the inner diameter of the processing barrel (21).

5. The sludge multi-stage extrusion dehydration treatment equipment according to claim 4 is characterized in that: The lifting assembly (23) comprises a first electric push rod (231), which is mounted on the outer shell of the processing barrel (21); a lifting frame (232) is fixedly mounted on the output end of the first electric push rod (231); and the stirring motor (224) is fixedly mounted on the lifting frame (232).

6. The sludge multi-stage extrusion dehydration treatment equipment according to claim 5, characterized in that: The second extrusion module (30) comprises a second extrusion groove (31), a second drawer scraper (32) and a second hydraulic cylinder (34); the second hydraulic cylinder (34) is fixed separately; a second pressing plate (35) is fixedly mounted on the output end of the second hydraulic cylinder (34); the second pressing plate (35) is slidably mounted in the second extrusion groove (31); a sewage inlet (311) is provided on one side of the second extrusion groove (31); the sewage inlet (311) is communicated with the outlet (212); a groove is provided at the bottom of the second drawer scraper (32); the second drawer scraper (32) is slidably mounted in the groove at the bottom of the second extrusion groove (31); a blocking net (37) is fixedly mounted at the bottom of the second extrusion groove (31); a filter cloth (36) is fixedly mounted at the bottom of the second extrusion groove (31); a second electric push rod (33) is fixedly mounted outside the second extrusion groove (31); the second electric push rod (33) is fixedly connected to the second drawer scraper (32).

7. The sludge multi-stage extrusion dehydration treatment equipment according to claim 6 is characterized in that: The filter cloth (36) is located below the second drawer scraper (32), and the filter cloth (36) is located above the blocking net (37).

8. The sludge multi-stage extrusion dehydration treatment equipment according to claim 7 is characterized in that: Notches are provided on both sides of the filter screen (141); a protrusion matching the notches is provided at the position where the filter screen (141) is installed on the first drawer scraper (14); and a stopper for fixing the filter screen (141) is provided at the bottom of the first drawer scraper (14).

9. The sludge multi-stage extrusion dehydration treatment equipment according to claim 8, characterized in that: A sloping plate for removing large solid impurities is also provided on one side of the frame (40) close to the first extrusion module (10); baffles are provided on both sides of the sloping plate.

10. The sludge multi-stage extrusion dehydration treatment equipment according to claim 2, characterized in that: The mud discharge groove (16) is in the shape of a trapezoidal funnel, the connection with the processing barrel (21) is a round hole, and the connection with the first extrusion groove (11) is a square hole.

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