Fully automatic solid-liquid separation system for sludge treatment

Abstract

The present invention discloses a fully automatic solid-liquid separation system suitable for sludge treatment, including a material pretreatment system and a mud spreading filter press device; wherein the material pretreatment system includes: a sludge stirring bin, which is used to contain and stir the material to be spread; one or more conditioning tanks, which are connected to the sludge stirring bin and are equipped with an automatic conditioning agent feeding device; the mud spreading filter press device includes: one or more mud spreading machines, whose inlets are connected to the corresponding conditioning tanks, a filter press, which is arranged beside the material spreading outlet of the mud spreading machine, and includes one or more filter press devices, the number of filter press devices is the same as the number of mud spreading machines, and they are arranged one by one on the material spreading side of the mud spreading machine, and each filter press device includes a filter press assembly, a lifting mechanism and a press. The filter press system achieves the effects of fast solid-liquid separation and mud removal speed, high dehydration rate, low filter cloth requirements and small footprint.

Description

Technical Field

[0001] The invention belongs to the technical field of solid-liquid separation, and in particular relates to a full-automatic solid-liquid separation system suitable for sludge treatment. Background Art

[0002] The main function of the filter press is to separate sludge or water through mechanical kinetic energy. It has a wide range of uses. Common solid-liquid separation equipment in the prior art includes screw stacking machine, cloth belt filter press, spiral solid-liquid separator, and plate and frame filter press. The disadvantage of the screw stack sludge dewatering machine is that the equipment can work continuously, and the sludge water content is generally around 80%. The disadvantage of the cloth belt filter press is that the sludge water content is high, the energy consumption is large, and the maintenance is difficult. The water content of the solid after extrusion by the spiral extrusion solid-liquid separator is about 65-70%. The disadvantage of the plate and frame filter press is that the processing capacity is small and it is troublesome to replace the filter cloth.

[0003] In summary, due to the different structural forms, the process principles of various filter press equipment are also different, but from the perspective of dehydration effect and automation, there is currently no equipment that can operate fully automatically and ensure a dehydration rate below 38%. At the same time, the existing filter press system has a relatively low degree of automation, high labor costs, a large footprint, a low mud cake discharge speed, and high requirements for filter cloth. Summary of the invention

[0004] The purpose of the present invention is to provide a fully automatic solid-liquid separation system suitable for sludge treatment, so as to achieve the effects of fast solid-liquid separation and sludge removal speed of the filter press system, high dehydration rate, low requirements for filter cloth and small footprint.

[0005] The present invention adopts the following technical solutions:

[0006] The fully automatic solid-liquid separation system suitable for sludge treatment includes a material pretreatment system and a sludge filter press device;

[0007] Material pre-processing system, including:

[0008] A sludge mixing bin, which is used to contain and mix the materials to be laid;

[0009] One or more conditioning tanks are connected to the sludge mixing bin and are used to receive the materials to be laid pumped in from the sludge mixing bin, and an automatic conditioning agent feeding device is installed on the conditioning tank;

[0010] The mud filter press device includes:

[0011] One or more mud spreading machines, the number of which is the same as the number of conditioning tanks, and the inlets of which are connected to the corresponding conditioning tanks for receiving the conditioned materials to be spread;

[0012] A filter press is arranged beside the material distribution outlet of the mud distributor, which includes one or more filter press devices. The number of filter press devices is the same as the number of mud distributors, and they are arranged one by one on the material distribution side of the mud distributor. Each filter press device includes a filter press assembly, a lifting mechanism and a press:

[0013] A filter press assembly includes a plurality of filter press plates arranged in parallel from top to bottom, the upper surface of each filter press plate is used for cloth,

[0014] A lifting mechanism, whose lifting end is connected to the filter press assembly, is used to drive each filter press plate to switch between two states of separation and close contact; wherein, when adjacent filter press plates are in a state of separation, the mud distributor distributes material to each layer of filter press plates;

[0015] A press machine is vertically arranged on the top of the filter press assembly, and is used to press down the top filter press plate after the mud is distributed, so as to complete the filtration of the distributed material and form a mud cake.

[0016] Furthermore, the fully automatic solid-liquid separation system suitable for sludge treatment also includes a mud cake collection system, which is used to collect mud cakes formed after the material is filtered, and the number is the same as that of the filter press device. A mud cake collection system includes:

[0017] A belt conveyor is arranged on the side where the filter press device outputs the mud cake and is used to transport the mud cake;

[0018] A mud cake collecting bucket is connected to the belt conveyor and is used for receiving the mud cake.

[0019] Furthermore, the fully automatic solid-liquid separation system suitable for sludge treatment also includes a sewage treatment system, which includes:

[0020] a sump, connected to the sewage discharge portion of each filter press device, for collecting sewage generated during the filter press process;

[0021] A sewage treatment station is connected to the outlet of the sump and is used to purify the sewage.

[0022] Furthermore, the fully automatic solid-liquid separation system suitable for sludge treatment also includes an air suction and biological deodorization device, which includes:

[0023] An absorption tower, including an exhaust gas inlet and an exhaust gas outlet, for absorbing exhaust gas generated during the conditioning tank, mud distributor, filter press, mud cake collection system and / or sewage treatment system;

[0024] A biological deodorization device is connected to the exhaust gas outlet of the absorption tower and is used to deodorize the exhaust gas and then discharge it into the atmosphere after it reaches the standard.

[0025] Furthermore, the mud spreading machine comprises:

[0026] A mud distribution main pipe, arranged vertically, for conveying the materials to be distributed;

[0027] A plurality of mud spreading branch pipes are arranged in a horizontal array from top to bottom, each mud spreading branch pipe: the outlet end of each mud spreading branch pipe is provided with a mud spreading nozzle for spreading the material, and the inlet end of each mud spreading branch pipe is connected to the mud spreading main pipe;

[0028] A mobile support mechanism is used to provide a platform for the mud distribution main pipe and a plurality of mud distribution branch pipes to reciprocate in the horizontal direction;

[0029] Among them, the mobile support mechanism is used to move forward horizontally to place multiple mud distribution nozzles thereon in the gap for distribution when a gap is generated between adjacent filter press plates; it is also used to move backward horizontally to withdraw from the gap after the distribution is completed.

[0030] Furthermore, the mobile support mechanism includes:

[0031] A support frame is arranged on the mud distribution main pipe or any mud distribution branch pipe, and a slider is arranged on the support frame;

[0032] A bracket, on which a track matching the slider is arranged, for realizing horizontal reciprocating movement of the support frame thereon;

[0033] A mud spreading cylinder, the end of which is connected to a support frame, is used to realize the movement of a slider on a track through the telescopic action of the telescopic rod, thereby realizing the horizontal reciprocating movement of the mud spreading branch pipe.

[0034] Further, the filter press plate comprises:

[0035] A water-permeable plate, which is a flat plate structure provided with a plurality of water-permeable holes;

[0036] A bottom sealing plate is arranged below the water-permeable plate to form a closed water receiving space with the water-permeable plate, and a water outlet is provided on the side of the bottom sealing plate;

[0037] A filter cloth is horizontally and annularly arranged on the water-permeable plate and the bottom sealing plate, and its upper surface is used to place the material to be filtered, and is also used to rotate around the water-permeable plate and the bottom sealing plate, and then output the material to be filtered out;

[0038] A rubber sealing strip is arranged at the bottom of the bottom sealing plate.

[0039] Furthermore, the lifting mechanism comprises:

[0040] A plurality of hanging plates are connected and arranged between adjacent filter press plates, so as to keep the distance between the filter press plates within a certain spacing range when the filter press plates are separated;

[0041] A lifting cylinder, whose telescopic rod is connected to a filter press plate on the top layer, and the bottom of the cylinder body of the lifting cylinder is fixedly arranged on the bottom plate; it is used to adjust the distance between the filter press plates through the telescopic action of the telescopic rod.

[0042] Further, the press comprises:

[0043] A press upper platform;

[0044] A main press oil cylinder, the cylinder body of which is fixedly connected to the upper platform of the press;

[0045] A press table connected to the end of the telescopic rod of the main press cylinder;

[0046] Four filter press plate guide posts are vertically arranged between the upper platform and the bottom plate of the press, and are located around the main press cylinder.

[0047] The second technical solution adopted by the present invention is a working method of a fully automatic solid-liquid separation system suitable for sludge treatment, which adopts a fully automatic solid-liquid separation system suitable for sludge treatment, and specifically includes the following contents:

[0048] S1, the material pretreatment system pre-treats the material to be laid, and the pre-treated material to be laid is transported to the mud spreading machine;

[0049] S2, the mud distributor and the filter press work alternately in a cycle. One working cycle is as follows: the filter plates of the filter press are separated under the rising action of the lifting mechanism, and a uniform gap is formed under the limiting action of the hanging plate. The mud distributor moves forward under the action of the mobile support mechanism, so that the mud distributor nozzle enters the gap and distributes the material. After the distribution is completed, the mud distributor nozzle withdraws from the gap under the action of the mobile support mechanism, and the press presses down each filter plate to complete the filtration of the material and form a mud cake.

[0050] S3. The mud cake produced after each filtration is transported to the mud cake collection system;

[0051] The wastewater generated during the filter pressing process is sent to the sewage treatment system;

[0052] Waste gases generated during pretreatment, mud distributors, filter presses, mud cake collection systems and / or sewage treatment systems are sent to the suction and biological deodorization device.

[0053] The beneficial effects of the present invention are:

[0054] 1. The present invention provides a new solid-liquid separation system structure, in which the rollers arranged on each layer of filter press plates rotate, driving the filter cloth to rotate and be used for mud discharge, so each layer can discharge mud at the same time, and the overall mud discharge efficiency is high;

[0055] 2. The press of the present invention is a four-column press, which forcibly dehydrates the material between the filter cloths. Since the maximum tonnage of this type of press can reach 320t, its dehydration rate can reach up to about 38%.

[0056] 3. The filter cloth in the present invention is a closed ring structure arranged around each filter press plate. The length of a single filter press plate is usually 1-2 meters, so the pressure bearing capacity and softness requirements of the filter cloth are reduced, and only the water permeability requirement needs to be met.

[0057] 4. The filter cloths of the filter press of the present invention are overlapped longitudinally, and mud spreading and filtration can be completed at the same station, which reduces the floor space compared to a multi-station press. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a structural schematic diagram of a fully automatic solid-liquid separation system suitable for sludge treatment according to the present invention;

[0059] Figure 2 for Figure 1 The main view;

[0060] Figure 3 for Figure 1 Side view of

[0061] Figure 4 This is a process flow chart of a fully automatic solid-liquid separation system suitable for sludge treatment according to the present invention;

[0062] Figure 5 It is a front view of a sludge distributor of a fully automatic solid-liquid separation system suitable for sludge treatment according to the present invention;

[0063] Figure 6 for Figure 5 Side view of

[0064] Figure 7 for Figure 5 A top view of

[0065] Figure 8 It is a structural schematic diagram of a sludge distributing machine and a filter press in a sludge distributing state of a fully automatic solid-liquid separation system suitable for sludge treatment according to the present invention;

[0066] Fig. 9 It is a structural schematic diagram of a sludge distributor and a filter press in a filtration state of a fully automatic solid-liquid separation system suitable for sludge treatment according to the present invention;

[0067] Fig.10 It is a front view of the filter press plate of the fully automatic solid-liquid separation system suitable for sludge treatment of the present invention;

[0068] Fig.11 for Fig.10 A top view of

[0069] Fig.12 for Fig.10 Longitudinal cross-sectional view of .

[0070] Among them, 1. press, 2. sludge mixing bin, 3. conditioning tank, 4. sump, 5. sludge distributor, 6. automatic conditioning agent feeding device, 7. filter press, 8. sewage treatment station, 9. suction and biological deodorization device, 10. absorption tower, 11. press upper platform, 12. main press oil cylinder, 13. press platform, 14. filter plate guide column, 15. filter plate, 16. filter cloth cleaning nozzle, 17. bottom plate, 18. lifting Oil cylinder, 19. Sliding block, 20. Mud spreading oil cylinder, 21. Bracket, 22. Mud spreading nozzle, 23. Hanging plate, 24. Mud limiting plate, 25. Track, 31. Bottom sealing plate, 32. Rubber sealing strip, 33. Compression spring, 34. Permeable plate, 35. Reset plate, 36. Mud scraper, 37. Water outlet, 38. Guide sleeve, 39. Groove, 40. Drainage trough; 41. Mud spreading main pipe, 42. Mud spreading branch pipe, 43. Support frame. DETAILED DESCRIPTION

[0071] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] 1. The present invention provides a fully automatic solid-liquid separation system suitable for sludge treatment, such as Figure 1-3 As shown, it includes a material pretreatment system, a mud distributor 5 and a filter press 7; it may also include a mud cake collection system, a sewage treatment system and / or an air suction and biological deodorization device 9.

[0073] 1. The material pretreatment system includes a sludge mixing bin 2 and a conditioning tank 3, and may also include an automatic conditioning agent feeding device 6. The sludge mixing bin 2 is used to receive the material to be treated. The source of the material to be treated can be transported to the sludge mixing bin 2 by a solid-liquid transport vehicle, or directly built in a field where various types of sludge need to be treated, and transported to the sludge mixing bin 2 by a screw conveyor. The material to be treated is usually in the form of a solid-liquid mixture, and can be used for solid-liquid separation of sewage treatment plant sludge, grain processing plant sludge, brewery sludge, dairy plant sludge and separated kitchen waste.

[0074] The material after being stirred and processed by the sludge stirring bin 2 is transported to the conditioning tank 3 by the sludge pump. According to the production capacity requirements, the conditioning tank 3 can be set to one, two or more. Each conditioning tank 3 also includes an automatic conditioning agent feeding device 6, through which the flocculant is pumped into the conditioning tank 3.

[0075] The solid-liquid mixture is poured into the sludge mixing bin 2, which is equipped with two mixers for mixing the solid-liquid mixture, so that the solid-liquid mixture is fully mixed to prevent coagulation, precipitation and agglomeration. The sludge pump on the sludge mixing bin 2 then pumps the stirred viscous solid-liquid mixture into the conditioning tank 3, which is also equipped with a mixer; at the same time, the flocculant metering pump on the automatic conditioning agent feeding device 6 pumps the flocculant into the conditioning tank 3. The solid-liquid mixture and the flocculant are mixed according to the conventional ratio, and the metering pump controls the dosage ratio according to the program. Conditioning takes about 30 minutes.

[0076] 2. If Figure 5-7 As shown, the number of the mud spreading machines 5 is the same as the number of the conditioning tanks 3, and the inlet of a single mud spreading machine 5 is connected to the corresponding conditioning tank 3 for receiving the conditioned material to be spread.

[0077] A single mud spreading machine 5 includes a mud spreading main pipe 41, a plurality of mud spreading branch pipes 42 and a mobile support mechanism. The specific structure is described as follows:

[0078] 2.1. The mud distribution main pipe 41 can usually be set vertically as the entrance for conveying the material to be distributed; it is connected to the outlet of the conditioning tank 3; multiple mud distribution branch pipes 42 are arranged in parallel from top to bottom, each of the mud distribution branch pipes 42 includes an outlet end and an inlet end, and its outlet end is provided with a mud distribution nozzle 22 for distribution, and its inlet end is connected to the mud distribution main pipe 41. Among them, a mud limiting plate 24 for limiting the thickness of mud distribution and a filter cloth cleaning nozzle 16 for cleaning the mud distribution nozzle 22 are provided next to the outlet of each mud distribution nozzle 22. The mud distribution branch pipe 42 is used to move forward horizontally when a gap is generated between adjacent filter press plates 15 to place multiple mud distribution nozzles 22 thereon in the gap for distribution; it is also used to retreat horizontally to withdraw from the gap after the distribution is completed.

[0079] 2.2. A mobile support mechanism, which is used to provide a platform for the mud spreading main pipe 41 and the plurality of mud spreading branch pipes 42 to reciprocate in the horizontal direction. Specifically, it includes a support frame 43, a bracket 45 and a mud spreading cylinder 20. The support frame 43 is connected to the mud spreading main pipe 41 or any mud spreading branch pipe 42, and is used to combine the mud spreading main pipe 41 and the plurality of mud spreading branch pipes 42 into an integral structure, and a slider 19 is provided on the support frame 43. The bracket 45 is a fixed support structure, on which a track 25 matching the slider 19 is provided, and the slider 19 can reciprocate horizontally along the track 25. The movement of the slider 19 can be transmitted to the mud spreading main pipe 41 and the plurality of mud spreading branch pipes 42 through the support frame 43, so that the horizontal reciprocating movement of the mud spreading nozzle 22 is finally realized. The end of the telescopic rod of the mud spreading cylinder 20 is connected to the support frame 43, and is used to realize the movement of the slider 19 on the track 25 through the telescopic action of the telescopic rod, thereby realizing the horizontal reciprocating movement of the mud spreading branch pipe 42. It provides the basis for the subsequent intermittent mud spreading.

[0080] 2.3. The support frame 43 and the bracket 45 are welded by steel sections. The mud distribution main pipe 41 and each mud distribution branch pipe 42 are supported by the support frame 43, and a track 25 is installed on the bracket 45, and the track 25 is fixed. The mud distribution cylinder 20 extends forward, and the mud distribution main pipe 41 drives each mud distribution branch pipe 42 and the slider 19 to slide forward on the track 25. The mud distribution nozzle 22 enters the interlayer of the adjacent filter press plate 15, and the electric valves of the mud distribution cylinder 20 and the top three layers of mud distribution branch pipes 42 are opened. The material to be distributed is sprayed on the filter cloth of the top three layers of the filter press plate 15 in the form of a solid-liquid mixture. The driving motor of the filter cloth of the filter press plate 15 rotates counterclockwise, and the filter cloth moves forward with the solid-liquid mixture, and then the solid-liquid mixture is evenly arranged on the filter cloth between the layers of the filter press plate 15 through the mud limiting plate 24 in front of the mud distribution nozzle 22. Then, by analogy, mud spreading is carried out in intervals of three layers from top to bottom until the solid-liquid mixture is evenly distributed on the filter cloths of all filter press plates. The rod of the mud spreading cylinder 20 retracts, the entire mud spreading support retreats, and the mud spreading nozzles 22 also withdraw from the layers of each filter press plate 15 until the mud spreading cylinder 20 stops working after the retreat stroke is completed.

[0081] The number of the mud distribution branch pipes 42 is determined according to the number of the filter press plates 15 . The number of the filter press plates 15 minus one is the number of the mud distribution branch pipes 42 . The working principles of the mud distribution branch pipes 42 are the same.

[0082] 3. If Figure 8-9 As shown, the filter press 7 is arranged next to the material distribution outlet of the mud distribution machine 5, which includes one or more sets of filter press devices. The number of filter press devices is the same as the number of the mud distribution machines 5, and they are arranged one by one on the material distribution side of the mud distribution machine 5. Each set of the filter press devices includes a filter press assembly, a lifting mechanism and a press 1.

[0083] The filter press assembly includes a plurality of filter press plates 15 arranged in parallel from top to bottom, and the upper surface of each filter press plate 15 is used for material distribution. The lifting end of the lifting mechanism is connected to the filter press assembly, and is used to drive each filter press plate 15 to switch between two states of separation and close contact; wherein, when adjacent filter press plates 15 are in a state of separation, the mud distribution machine 5 distributes material to each layer of the filter press plates 15. The press machine 1 is vertically arranged at the top of the filter press assembly, and is used to press down the filter press plate 15 at the top after mud distribution, thereby generating downward pressure on the filter press assembly to complete the filtration of the distributed material.

[0084] The filter press 7 can adopt the following specific structure, but is not limited to the following structure:

[0085] 3.1. The materials filtered by the filter press assembly can be sewage treatment plant sludge, grain processing plant sludge, brewery sludge, dairy factory sludge and separated kitchen waste.

[0086] like Figure 10-12 As shown, the filter press plate 15 includes: a water-permeable plate 34, which is a flat plate structure with multiple water-permeable holes; a bottom sealing plate 31, which is arranged below the water-permeable plate 34 at intervals, and forms a closed water receiving space between the bottom sealing plate 31 and the water-permeable plate 34, and a water outlet 37 is opened on its side; a filter cloth, which is arranged horizontally and annularly on the water-permeable plate 34 and the bottom sealing plate 31, and its upper surface is used to place the material to be clothed, and is also used to rotate around the water-permeable plate 34 and the bottom sealing plate 31, and then output the material to be clothed after the filter is pressed; that is, the filter cloth is used for mud distribution and mud discharge. Usually, two rollers can be set at both ends of each layer of filter cloth, one is a non-powered roller, and the other is a motorized roller. By driving the motorized roller to rotate, the filter cloth is directly driven to rotate, and the mud discharge speed is fast. A rubber sealing strip 32 is set at the bottom of the bottom sealing plate 31.

[0087] A groove is arranged around the outer side of the bottom sealing plate 31, and a plurality of compression springs 33 are arranged vertically in the groove. One end of each compression spring 33 is fixedly mounted on the bottom sealing plate 31, and the other end is connected to a reset plate 35. When each filter press plate 15 is pressed and tightly fitted, the reset plate 35 of the lower filter press plate 15 will generate upward pressure on the upper filter press plate 15 under the action of the compression spring 33, thereby enhancing the contact pressure between adjacent filter press plates 15.

[0088] A large amount of liquid will be generated around the filter press plate 15 during the filtration process. The liquid will enter the water receiving space through the water permeable plate 34 and be discharged from the water outlet 37 .

[0089] The filter press plate 15 may further include one or two scraper plates 36, which are usually connected to the side walls of the bottom sealing plate 31, respectively located at the feed side and the discharge side of the filter press plate 15. The scraper plates 36 are used to scrape mud to separate the mud cake from the filter cloth.

[0090] At least two or more filter press plates 15 need to work at the same time to perform the filter pressing operation. When the materials are laid on the upper surface of each filter press plate 15, the main press cylinder 12 moves downward, and when each upper filter press plate 15 is pressed downward, the rubber sealing strip 32 at the bottom of the upper filter press plate 15 of the two adjacent filter press plates 15, together with the filter cloth, the material to be laid in a solid-liquid mixed state, and the filter cloth of the filter press plate 15 at the lower layer, is pressed downward, and the rubber sealing strip 32 of the upper filter press plate 15 drives the double-layer filter cloth to contact the reset plate 35 in the groove 39 of the lower filter press plate 15. Continuing to press down the compression spring 33 will generate an upward reaction force to support the upper filter cloth and the rubber sealing strip 32. Continuing to press down will become tighter and tighter and play a sealing role. However, it can only seal mud, not water. Even if some water leaks, it will leak into the groove 39. A drainage groove 40 is opened at the bottom of the groove 39.

[0091] The material to be filtered on the filter cloth will be wrapped in a relatively sealed space on all sides and cannot overflow. The main press cylinder 12 continues to press downward. During this process, the material to be filtered is squeezed by the upper filter plate 15 and the lower filter plate 15, and the waste water will be squeezed out. The waste water moves downward under the action of gravity and passes through the small holes in the water-permeable plate 34 to flow into the bottom sealing plate 31 and the water-permeable plate 34 to form a closed water receiving space, and gathers in the drainage groove 40 until it flows out from the outlet 37.

[0092] 3.2. A lifting mechanism is connected to the filter press assembly, and its lifting action is used to achieve two functions: driving each filter press plate 15 to rise and generating a uniform gap between adjacent filter press plates 15; driving each filter press plate 15 to descend and making each filter press plate 15 in close contact.

[0093] There are many structures to realize the lifting function, and the present invention provides a specific structure as follows:

[0094] The present invention uses a plurality of hanging plates 23, each of which is crescent-shaped or semicircular, and the hanging plates 23 are conventional and general parts. The plurality of hanging plates 23 are connected and arranged between the adjacent filter press plates 15, so as to keep the distance between the filter press plates 15 within a certain spacing range when the filter press plates 15 are separated. The hanging plates 23 are connected and arranged between the adjacent filter press plates 15, so that when the filter press plates 15 need to be separated, due to the length limitation of the hanging plates 23, a certain spacing can be maintained between the filter press plates 15; the arrangement of the hanging plates 23 does not affect the contact and separation action of the filter press plates 15, but is only used to limit the filter press plates 15 from being separated at will when they are separated.

[0095] At the same time, a lifting cylinder 18 is also provided, and its telescopic rod is connected to one of the topmost filter press plates 15. Then, when the telescopic rod of the lifting cylinder 18 is extended and retracted, it will drive the rise and fall of each filter press plate 15. At the same time, each filter press plate 15 will be evenly spaced when rising and will be in close contact when descending. When each filter press plate 15 is evenly spaced, material can be placed on the upper surface of each filter press plate 15. The lifting cylinder 18 is used to adjust the distance between the filter press plates 15 through the telescopic action of the telescopic rod.

[0096] The main press cylinder 12 rises and drives the press platform 13 to rise. The lifting cylinder 18 rises and drives the uppermost filter press plate 15 to move up. The hanging plates 23 on both sides of the filter press plate 15 will also move up, driving the suction layer filter press plate and then the next layer of semicircular hanging plates to move up. All the filter press plates 15 will be opened at one time, and the lifting cylinder 18 will also complete its stroke and then maintain pressure.

[0097] 3.3. The press machine 1 is vertically arranged on the top of the filter press assembly, and is used to generate downward pressure on the filter press assembly when the plurality of filter press plates 15 are in close contact, so as to complete the filter press of the material. The material is a solid-liquid mixture.

[0098] Specifically, the press 1 includes a press upper platform 11, the position of which remains fixed; a main press oil cylinder 12 is provided, including a cylinder body and a telescopic rod, the cylinder body of which is fixedly connected to the press upper platform 11, and the end of the telescopic rod is connected to a press platform 13. The press 1 also includes four filter plate guide pillars 14, which are vertically arranged around the main press oil cylinder 12 and are located between the press upper platform 11 and the bottom plate 17. Among them, the filter plate 15 can also include four guide sleeves 38, each of which is an annular structure, arranged on both sides of the bottom sealing plate 31, and used to be correspondingly sleeved on each of the filter plate guide pillars 14.

[0099] In summary, according to the production capacity requirements, the conditioning tank 3 can be set to one, two or more, and the corresponding mud spreading machine 5 can also be set to one, two or more. Figure 4 As shown, when there are two conditioning tanks 3, two mud distributors 5 are also provided, and one filter press 7 is provided. The filter press device inside the filter press 7 is also provided with two sets, and each set of filter press device includes a press machine 1 and a filter press assembly, that is, a total of two press machines 1 and two filter press assemblies. Then, the two mud distributors 5 are correspondingly provided beside the two filter press assemblies to distribute mud to the two filter press assemblies respectively. Among them, the filter press 7 including two sets of filter press devices is a double-head intelligent filter press separator.

[0100] 4. If Figure 1-2 As shown, the fully automatic solid-liquid separation system suitable for sludge treatment of the present invention may also include a mud cake collection system, which is used to collect mud cakes formed after the material is filtered, and the number is the same as that of the filter press device, wherein one mud cake collection system includes a belt conveyor and a mud cake collection bucket. The belt conveyor is arranged on the side where the filter press device outputs the mud cake, and is used to transport the mud cake to the mud cake collection bucket and process the mud cake.

[0101] The fully automatic solid-liquid separation system for sludge treatment of the present invention may also include a sewage treatment system, which includes a sump 4 connected to the sewage discharge part of each filter press device, and the sump 4 is used to collect sewage generated during the filter press; and also includes a sewage treatment station 8 connected to the outlet of the sump 4, and the sewage treatment station 8 is used to purify the sewage. The purified sewage that meets the standards is discharged into a river or an underground pipe network.

[0102] The fully automatic solid-liquid separation system suitable for sludge treatment of the present invention may also include an air suction and biological deodorization device 9, which includes an absorption tower 10 and a biological deodorization device. The absorption tower 10 includes an exhaust gas inlet and an outlet, which is used to absorb the exhaust gas generated during the conditioning tank 3, the mud spreading machine 5, the filter press 7, the mud cake collection system and / or the sewage treatment system. The biological deodorization device is connected to the exhaust gas outlet of the absorption tower 10, and is used to discharge the exhaust gas into the atmosphere after deodorization treatment to meet the standards.

[0103] 2. The working method of the fully automatic solid-liquid separation system suitable for sludge treatment of the present invention is:

[0104] S1, the material pretreatment system pre-treats the material to be laid, and the pre-treated material to be laid is transported to the mud spreading machine 5;

[0105] S2, the mud spreading machine 5 and the filter press 7 work alternately in a cycle, and one working cycle is as follows: the filter plates 15 of the filter press 7 are separated under the rising action of the lifting mechanism, and a uniform gap is formed under the limiting action of the hanging plate 23, and the mud spreading machine 5 moves forward under the action of the mobile support mechanism, so that the mud spreading nozzle 22 enters the gap and spreads the material; after the material is spread, the mud spreading nozzle 22 withdraws from the gap under the action of the mobile support mechanism, and the press 1 presses down each filter plate 15 to complete the filtration of the material and form a mud cake;

[0106] S3. The mud cake produced after each filtration is transported to the mud cake collection system;

[0107] The wastewater generated during the filter pressing process is sent to the sewage treatment system;

[0108] The waste gas generated during the pretreatment, mud distributor 5, filter press 7, mud cake collection system and / or sewage treatment system is sent to the suction and biological deodorization device 9.

[0109] in,

[0110] 1. The pretreatment process is that the material after stirring in the sludge stirring bin 2 is transported to the conditioning tank 3 through the sludge pump for further stirring, and at the same time, the flocculant is pumped into the conditioning tank 3 through the automatic conditioning agent feeding device 6.

[0111] 2. The process of mud distribution and filter pressing is:

[0112] 2.1. The mud distribution main pipe 41 and each mud distribution branch pipe 42 are supported by a support frame 43, and a track 25 is installed on the support frame 45, and the track 25 is fixed. The mud distribution cylinder 20 extends forward, and the mud distribution main pipe 41 drives each mud distribution branch pipe 42 and the slider 19 to slide forward on the track 25, and the mud distribution nozzle 22 enters the interlayer of the adjacent filter press plate 15, and the material to be distributed is sprayed on the filter cloth of the filter press plate 15 in the form of a solid-liquid mixture. The drive motor of the filter cloth of the filter press plate 15 rotates counterclockwise, and the filter cloth moves forward with the solid-liquid mixture, and then the solid-liquid mixture is evenly arranged on the filter cloth between the layers of the filter press plate 15 through the mud limiting plate 24 in front of the mud distribution nozzle 22. After the mud distribution is completed, the rod of the mud distribution cylinder 20 retracts, the entire mud distribution bracket retreats, and each mud distribution nozzle 22 also withdraws from the interlayer of each filter press plate 15 until the mud distribution cylinder 20 stops working after the retreat stroke is completed.

[0113] 2.2. The main press cylinder 12 drives the press platform 13 downward to press onto the top filter plate 15. The lifting cylinder 18 descends and drives all the filter plates 15 downward until all the filter plates 15 are closed. At this time, the press 1 maintains pressure for 10 minutes. During the pressure maintenance process, the filtered wastewater will be discharged to the main sewage collection pipe through the outlet 37 on the side of the filter plate 15. The sewage in the main sewage collection pipe flows directly into the sewage collection pit and is then pumped to the sewage treatment station 8 for treatment. After meeting the standards, it is discharged into the river or urban pipe network. After maintaining pressure for 10 minutes, the main press cylinder 12 drives the press platform 13 upward until the stroke is completed. The lifting cylinder 18 is actuated to lift up, driving each layer of filter plates 15 to open evenly. The solid and liquid substances after filtration have become mud cakes at this time. Each layer of filter plates 15 is actuated by its corresponding driving motor to rotate the filter cloth, and the filter cloth will move forward in the direction of mud discharge. When the mud cake reaches the end, it passes through the scraper plate 36, separates from the filter cloth and falls onto the belt conveyor, and is then sent out of the workshop until it is placed in the mud cake collection bucket. At this point, the entire filtration process is completed.

[0114] 2.3. The mud spreading machine 5 and the filter press 7 are two devices that work together. In the initial state, the press 1 is retracted to its original position, the lifting cylinder 18 is pushed out, and each layer of the filter press plate 15 will be opened at a uniform interval, and a hanging plate 23 is installed between each layer of the filter press plate 15. The mud spreading cylinder 20 extends, and the multi-layer mud spreading nozzle 22 enters the gap between the adjacent layers of the multi-layer filter press plate 15. The material to be spread, that is, the solid-liquid mixture that has been conditioned, can be pumped for filtration. The sludge pump at the bottom of the conditioning tank 3 works to pump the solid-liquid mixture to the sludge spreading device 5. The driving motors of each filter press plate 15 are activated, and the filter cloth will rotate around the filter press plate 15 where it is located. This process can deliver the solid-liquid mixture to the entire filter press plate 15, and the mud can be spread evenly after being limited by the scraper plate 36. The mud cylinder 20 is pneumatically retracted, and the entire mud spreading pipeline retreats and moves out of the gap between adjacent filter press plates 15. Next, the main press cylinder 12 and the lifting cylinder 18 are pressed down at the same time until all the filter presses 15 are completely closed, and then the pressure is maintained for 10 minutes, and the entire filter pressing process is completed. When the solid-liquid mixture is distributed to the end of the filter press plate 15 away from the mud distribution nozzle 22, the sludge pump is controlled to stop working through the sensor set on it, the mud distribution cylinder 20 is retracted, and the mud distribution nozzle 22 is completely withdrawn from the plate layers of each filter press plate 15, and the mud distribution stops.

[0115] 3. The mud cake collection process is that the belt conveyor conveys the mud cake obtained by filtration to the mud cake collection bucket. The sewage treatment process is that all the sewage generated by filtration of the filter press 7 is discharged into the sump 4, and then transported from the sump 4 to the sewage treatment station 8, and the sewage is purified. The sewage that meets the discharge standard can be discharged into the river or underground pipe network. The deodorization process is that the waste gas generated in the conditioning tank 3, the mud spreader 5, the filter press 7, the mud cake collection system and / or the sewage treatment system is collected in the absorption tower 10, and then transported to the biological deodorization device through the absorption tower 10, and the waste gas is deodorized and discharged into the atmosphere after meeting the standards.

[0116] The rollers arranged on each layer of the filter press plate of the present invention rotate, driving the filter cloth to rotate and discharge mud, so each layer can discharge mud at the same time, and the overall mud discharge efficiency is high. The conventional mud discharge equipment is a continuous Z-shaped folded filter cloth, and the time for the mud cake to be transported and discharged on this form of filter cloth is relatively long.

[0117] The filter cloths of the filter press of the present invention are arranged to overlap longitudinally, and mud spreading and filtration can be completed at the same station, which reduces the floor space compared to a multi-station press. The press of the present invention can be a four-column press or a frame press, which forcibly dehydrates the materials between the filter cloths. Since this type of press has a large tonnage, which can reach a maximum of 320t, its dehydration rate can reach up to about 38%. The separated products generally include mud cakes with a moisture content of about 38-45% and separated sewage. The purpose of solid-liquid separation is mainly to provide conditions for the later landfill, incineration, and organic fertilizer fermentation of mud cakes. After sludge dehydration, landfill and groundwater pollution can be reduced; after sludge dehydration, the incineration cost can be reduced; after sludge dehydration, the organic fertilizer fermentation speed can be accelerated and the pollution to the ambient atmosphere can be greatly reduced, which has long-term economic and social benefits.

[0118] In the prior art filter press, the basic requirement for the filter cloth is to have good water permeability. In the commonly used Z-shaped filter cloth arrangement, a 500-meter-long filter cloth can be used in one station. Due to the large span of the filter cloth, it must withstand a certain pressure, so the filter cloth must reach a certain strength; but in order to facilitate folding, the filter cloth is required to have a certain softness, and a certain water permeability must be guaranteed. It seems that the requirements for the filter cloth are relatively high, and the cost is high. The filter cloth in the present invention is a closed annular structure arranged around each filter press plate. The length of a single filter press plate is usually 1-2 meters, so the pressure bearing capacity and softness requirements of the filter cloth are reduced, and only the water permeability requirements need to be met.

Claims

1. A fully automatic solid-liquid separation system suitable for sludge treatment, characterized in that: It includes material pretreatment system and mud filter press device; among which, The material pretreatment system comprises: A sludge mixing bin (2) for containing and mixing the material to be laid; One or more conditioning tanks (3) are connected to the sludge stirring chamber (2) and are used to receive the material to be laid pumped into the sludge stirring chamber (2), and are equipped with an automatic conditioning agent feeding device (6); The mud filter press device comprises: One or more mud spreading machines (5), the number of which is the same as the number of the conditioning tanks (3), the inlets of which are connected to the corresponding conditioning tanks (3) and are used to receive the conditioned material to be spread; A filter press (7) is arranged beside the material distribution outlet of the mud distribution machine (5), comprising one or more filter press devices, the number of which is the same as the number of the mud distribution machines (5), and they are arranged one by one on the material distribution side of the mud distribution machine (5), each set of the filter press devices comprising a filter press assembly, a lifting mechanism and a press (1): A filter press assembly comprises a plurality of filter press plates (15) arranged in parallel from top to bottom, wherein the upper surface of each filter press plate (15) is used for spreading material. a lifting mechanism, the lifting end of which is connected to the filter press assembly, and is used to drive each filter press plate (15) to switch between two states of being separated from each other and being in close contact; wherein, when adjacent filter press plates (15) are in a state of being separated from each other, the mud distributor (5) distributes the material to each layer of the filter press plates (15); a press machine (1), vertically arranged at the top of the filter press assembly, for pressing down the filter press plate (15) at the top after the mud is spread, so as to complete the filtration of the spread material and form a mud cake; The mud spreading machine (5) comprises: A mud distribution main pipe (41), arranged vertically, for conveying the materials to be distributed; A plurality of mud spreading branch pipes (42) are arranged in a horizontal array from top to bottom, each of the mud spreading branch pipes (42): an outlet end of each mud spreading branch pipe (42) is provided with a mud spreading nozzle (22) for spreading materials, and an inlet end of each mud spreading branch pipe (42) is connected to the mud spreading main pipe (41); A movable support mechanism, used for providing a platform for the mud distribution main pipe (41) and the plurality of mud distribution branch pipes (42) to reciprocate in a horizontal direction; The movable support mechanism is used to horizontally move forward when a gap is generated between adjacent filter press plates (15) so as to place a plurality of mud distributing nozzles (22) thereon into the gap for distributing material; and is also used to horizontally move backward to withdraw from the gap after distributing material. The filter press plate (15) comprises: a water-permeable plate (34) which is a flat plate structure provided with a plurality of water-permeable holes; a bottom sealing plate (31) spaced below the water-permeable plate (34) to form a sealed water-receiving space between the bottom sealing plate and the water-permeable plate (34), and having a water outlet (37) formed on its side; a filter cloth, arranged horizontally and in an annular shape on the water-permeable plate (34) and the bottom sealing plate (31), the upper surface of which is used to place the material to be filtered, and is also used to rotate around the water-permeable plate (34) and the bottom sealing plate (31) and then output the material to be filtered to the outside; A rubber sealing strip (32) is arranged at the bottom of the bottom sealing plate (31).

2. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 1, characterized in that: The fully automatic solid-liquid separation system suitable for sludge treatment also includes a mud cake collection system, which is used to collect mud cakes formed after the material is filtered, and the number is the same as that of the filter press device. One mud cake collection system includes: a belt conveyor, arranged on the side where the filter press device outputs the mud cake, for transporting the mud cake; A mud cake collecting bucket is connected to the belt conveyor and is used for receiving the mud cake.

3. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 1 or 2, characterized in that: The fully automatic solid-liquid separation system suitable for sludge treatment also includes a sewage treatment system, which includes: a sump (4) connected to the sewage discharge portion of each filter press device and used for collecting sewage generated during the filter press process; A sewage treatment station (8) is connected to the outlet of the sump (4) and is used to purify the sewage.

4. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 3, characterized in that: The fully automatic solid-liquid separation system suitable for sludge treatment further comprises an air suction and biological deodorization device (9), wherein the air suction and biological deodorization device (9) comprises: an absorption tower (10), comprising an exhaust gas inlet and an exhaust gas outlet, for absorbing the exhaust gas generated during the conditioning tank (3), the mud distributor (5), the filter press (7), the mud cake collection system and / or the sewage treatment system; A biological deodorization device is connected to the exhaust gas outlet of the absorption tower (10) and is used to deodorize the exhaust gas and discharge it into the atmosphere after it meets the standards.

5. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 1 or 2, characterized in that: The mobile support mechanism comprises: a support frame (43) disposed on the mud distribution main pipe (41) or any one of the mud distribution branch pipes (42), wherein a slider (19) is disposed on the support frame (43); a bracket (21) on which a track (25) matching the slider is provided, and used to enable the support frame (43) to move horizontally back and forth thereon; A mud spreading cylinder (20) has a telescopic rod end connected to the support frame (43) and is used to achieve movement of the slider (19) on the track (25) through the telescopic action of the telescopic rod, thereby achieving horizontal reciprocating movement of the mud spreading branch pipe (42).

6. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 1 or 2, characterized in that: The lifting mechanism comprises: A plurality of hanging plates (23) connected and arranged between adjacent filter press plates (15) and used to ensure that the distance between the filter press plates (15) is maintained within a certain spacing range when the filter press plates (15) are separated; A lifting cylinder (18) having a telescopic rod connected to a topmost filter plate (15), and a bottom of a cylinder body of the lifting cylinder (18) fixedly arranged on a bottom plate (17); the lifting cylinder (18) is used to adjust the distance between the filter plates (15) by means of the telescopic action of the telescopic rod.

7. The fully automatic solid-liquid separation system suitable for sludge treatment according to claim 6, characterized in that: The press (1) comprises: A press upper platform (11); A main press oil cylinder (12), the cylinder body of which is fixedly connected to the press upper platform (11); A press platform (13) connected to the end of the telescopic rod of the main press cylinder (12); Four filter press plate guide pillars (14) are vertically arranged between the press upper platform (11) and the bottom plate (17), and are located around the main press cylinder (12).

8. A working method of a fully automatic solid-liquid separation system suitable for sludge treatment, characterized in that: The fully automatic solid-liquid separation system for sludge treatment according to any one of claims 1 to 7 specifically comprises the following contents: S1, the material pretreatment system pre-treats the material to be laid, and the pre-treated material to be laid is transported to a cloth spreading machine (5); S2, the mud spreading machine (5) and the filter press (7) work alternately in a cycle, wherein one working cycle is as follows: the filter plates (15) of the filter press (7) are separated under the ascending action of the lifting mechanism, and a uniform gap is formed under the limiting action of the hanging plate (23), and the mud spreading machine (5) moves forward under the action of the movable support mechanism, so that the mud spreading nozzle (22) enters the gap and spreads the material; After the material is distributed, the mud distribution nozzle (22) withdraws from the gap under the action of the mobile support mechanism, and the press machine (1) presses down each filter press plate (15) to complete the filtration of the material and form a mud cake; S3. The mud cake produced after each filtration is transported to the mud cake collection system; The wastewater generated during the filter pressing process is sent to the sewage treatment system; Waste gas generated during the pretreatment, mud distributor (5), filter press (7), mud cake collection system and / or sewage treatment system is sent to the air intake and biological deodorization device (9).

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